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  • 101.
    Cao, Haiping
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Wessén, Magnus
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Segringsband i pressgjutna magnesiumkomponenter2005In: Gjuteriet, ISSN 0017-0682, Vol. 5, p. 27-Article in journal (Other academic)
  • 102.
    Cao, Haiping
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Wessén, Magnus
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Granath, Olof
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Effect of injection velocity on porosity formation in rheocast Al component using RheoMetal process2010In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 23, no 3, p. 158-163Article in journal (Refereed)
  • 103.
    Carlsson, Angelique
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Kravspecifikation för en knapp till ett automatväxlingskoncept2011Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis deals with the development of a specification regarding a push-button, which will be used to control the gear-shifting function in an automobile. In addition to this the author will describe different techniques and theories that have been helpful in achieving data and results for the specification.

    Kongsberg Automotive AB, is located in Mullsjö, Sweden, the company supplies parts to the automotive industry. In the research and development department, R&D, there is a group that works with development of Shift-By-Wire systems. In an automobile with a Shift-By-Wire system the communication between the gear-shifter and the gear-box occurs electronically. The mechanical link is, in most cases, taken away and replaced by the digital system. Within this group an internal Kongsberg project is in motion dealing with the development of a number of gear-shifters, finalizing in the mounting of the shifters in a Smart Car. These concepts will be displayed to customers by Kongsberg as a demonstration of what the company has to offer.

    To be able to decide what appears in the specification the author has done a thorough push-button examination. Tightness is one of the most important elements in a push-button; it determines what the push-button conveys and its character. The choice of mechanical solution will affect both the tightness and the character of the push-button. To illustrate this, the author has chosen to use a version made of silicon rubber. The silicon rubber part is ordered from a supplier company specializing in customer-specific push-buttons. The method is simple, cost-effective, enables regulation in tightness, compressive force, illumination, density, repelling liquids, penetrating objects and other parameters. All of these properties are desirable when developing push-buttons.

    The specification consists of seven chapters. The first chapter describes the document. Chapter two is an introduction chapter. The following three chapters present the requirements made concerning the product. The sixth chapter concerns laws and regulations and the seventh and last chapter is an appendix. The requirements concerning the product consist of functional, qualitative and electrical requirements. Belonging to the functional requirements are the following: stroke, force, illumination etc. To the qualitative requirements belong: performance, reliability, applicability etc. The electrical requirements consist of preparing the button for Kongsbergs own patented sensor system.

    The specification will be handed over to Kongsberg on the finalization of the thesis. The result will work as a template, with the intent that the document is to be used and followed up by the company. The functional and qualitative requirements and data have been assumed by the author and will later be tested, followed up and if necessary altered by Kongsberg.

  • 104.
    Casadesus Baldursson, Jordi Hans
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Design concept for a Multifunctional Hygiene Cabin 20142013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The project  is related to the design of a new type of Public Toilets from the company Danfo for the year 2014.

     

    The proper project follows asequential order to show how to create solution to the existing problems of these Service  and re-design the product itself to create a new look and new core values to the existing service , creating   a new product line for this kind of service in the market in this particular case the re-design  of a new type of Public Toilets for the year 2014.

     

    Following the sequential order of a  design process it is proposed a new concept of Public Toilets  which will give service to users in City’s and Landscape areas. Developing a new  style and realistic concept of Publict Toilets.  Creating  sustainable buildings  which generate the 60 % of the own used energy,  using renewable energy sources from sun and wind, reusing the rainwater and with purifying water systems, for minimum water consumption, moreover a building  design to avoid vandalism and which give different services on the exterior creating information  reunion point, for the interior is looked at  the essence of  Public Toilets and why they where designed,  creating a new concept of  a multifunctional Hygiene cabin, and resolving the existing detected problems to create a  design concept that satisfied all the stakeholders involved in  the proper artifact and combined with the innovation of the design to open new markets.

     

    A new type of Public Toilets with  new core values and which gives new services based on the conclusion and reflections of the  done research.

    It is proposed a Re-design of the Exterior and Interior  of the existing building and the design  of two  new artifacts  for the interior which resolves and gives service, creating new goals for the company  and a new style. Combined with the existing technology and production methods  and materials thinking in the future development and trends.

  • 105.
    Cederfeldt, Mikael
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Planning Design Automation: A Structured Method and Supporting Tools2007Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The demand for customised products that meet different markets and different customers is steadily increasing. Also, the demand for shorter lead times for the delivery of these customised products puts strains on design departments whose work tends to become increasingly repetitive. At the same time, designing variants takes time from innovative, original design, and/or problem-solving tasks. A powerful tool in the endeavour to cut lead times, workloads, and ultimately costs in order to become more competitive in an increasingly globalised market is Design Automation. Automating tedious and repetitive design tasks will free the designers to focus on the tasks that require skill, creativity, intuition, and cooperation to be solved. Consequently, seeing a need for design automation systems is not difficult. What becomes a lot more difficult is identifying the type, scope, and format of the system implementation, as well as the actual design tasks and activities to support or automate. Therefore, there is a need for structured and systematic approaches for the realisation and implementation of design automation systems. This research work is aimed at presenting such approaches, methods, and aids. It also addresses the importance of identifying the exact tasks to be automated. This has to be done in order to find the method and implementations best suited for solving the tasks, something that is especially important for companies whose human and financial resources might not allow them to invest in a system with functionality that vastly exceeds their actual needs.

    The contribution of this work is a structured method for planning for design automation implementation. First, the design process is discussed from an automation perspective. Following this is a presentation of a framework of design automation. This framework has the purpose of serving as a common base for consensual discussions about design automation. In addition, it supports the setting-up of system specifications. The framework is followed by the introduction of a set of identifiers of system needs and potentials, focusing on the existing processes that need to be broken down and identified in order to specify the tasks to be automated. Following this is a set of criteria of system characteristics, focusing on properties of the intended system implementation. Finally, some realisation and implementation issues are addressed and exemplified through a number of pilot system implementations.

    The presented method for planning design automation, together with the presented framework of design automation, provides implementers with issues to address regarding potential, need, scope, and format of system implementations. Further, it supports the weighing of desired system characteristics in order to find the right balance between system complexity and functionality.

  • 106.
    Cederfeldt, Mikael
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Planning Design Automation Systems: Criteria and Guidelines2005Licentiate thesis, monograph (Other academic)
    Abstract [en]

    Design automation can be a powerful tool in the continuous endeavour to cut lead times, workloads, and, ultimately, costs in order to become more competitive in an increasingly globalised market. Identifying a need for design automation is, consequently, not difficult. What becomes a lot more difficult is identifying the actual need, i.e. the type, scope, and format of the system implementation, as well as the actual design tasks and activities to be automated.

    There is currently a need for structured and systematic approaches for the realisation and implementation of design automation systems. This research work is aimed at identifying such approaches, methods, and aids. It also addresses the importance of identifying the exact tasks that are to be automated. This has to be done in order to find the tools and implementations that are best suited for solving the tasks, something that is especially important for companies whose resources and economy might not allow them to invest in a system with functionality that vastly exceeds their actual needs.

    In this work, the design process is discussed from an automation perspective. Following this is a presentation of a framework of design automation. This framework has the purpose of serving as a common base for discussions about design automation as well as support in the setting up of initial system specifications. This is followed by the introduction of a set of criteria of design system characteristics, to be used for planning for design automation. These criteria, and descriptions of their use for system implementation and evaluation, constitute the main results of this work. The contribution of the set of criteria is a systematic approach to identifying design automation needs and setting up final system specifications. It provides implementers with general questions to answer about potential, need, scope, and format of system implementations. Further, it leads to weighing desired system characteristics in order to find the right balance between system complexity and functionality. Finally, some realisation and implementation issues are addressed. The set of criteria is complemented by guidelines for system implementation supporting some of the criteria.

    A design automation system based on the presented criteria and design automation framework is also presented. This system is evaluated by its users who give their views of systems performance related to the criteria’s level of fulfilment.

    The main conclusion of this work is that the set of criteria is a powerful tool for planning and evaluating design automation systems. Together with the presented framework, they also provide a structured and systematic approach to identifying the actual needs of design automation and setting up system specifications.

  • 107.
    Cederfeldt, Mikael
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Towards a Strategy for Mapping of Design Problems to Suitable Solutions: A Case of Design Automation Using CBR2006In: Proceedings of the DESIGN 2006: 9th International Design Conference, 2006, p. 471-478Conference paper (Refereed)
    Abstract [en]

    In order to make the designing of product variants more effective and efficient by automating the process, there is a need to break down and analyse the design process. In doing so, a clearer picture of the actual process will emerge. From this, a problem definition and a system specification can be outlined. This paper presents one such case of breaking down a design problem, defining its process character and capturing its inherent domain knowledge. This is then mapped to suitable tools and computer implementations. One of the tools chosen in this work, Case Based Reasoning, is further addressed, together with some implementation issues concerning CBR. Finally, advantages of a variant design approach to setting up CBR indexing templates are presented.

  • 108.
    Cederfeldt, Mikael
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Towards a Strategy for Mapping of Design Problems to Suitable Solutions: A Case of Design Automation using CBR2007In: Strojarstvo, ISSN 0562-1887, Vol. 49, no 1, p. 17-24Article in journal (Refereed)
    Abstract [en]

    In order to make the designing of product variants more efficient and effective there often exists the possibility of automating the process, or at least implementing some form of computer support to aid the designers. Designing though, is often not a simple and single task. Instead, it often consists of several interlinked sub-tasks that have to be performed either in some previously known order, iteratively, or perhaps even by inference. Furthermore, the levels of knowledge and task formalisation and process maturity may vary from known and clearly documented tasks (explicit), to known but undocumented tasks (implicit), or even unclear and unstructured tasks (ad-hoc).

    In doing so a clearer picture of the actual design process will emerge and a problem definition and/or system specification can be outlined [Cederfeldt 2005]. This will in turn give rise to new questions that needs to be answered in parallel with setting up of a final system specification. Some of these questions address the choice of solution approach related to the design process and its inherent knowledge. This paper presents one such attempt at breaking down a design problem, defining its process character and capturing its inherent domain knowledge. This is then mapped to suitable tools, and computer implementations. One of the tools chosen in this work, Cased Based Reasoning (CBR), will be addressed further and some implementation issues of CBR as well as the advantages of a variant design approach to setting up of CBR indexing templates are discussed in more detail.

  • 109.
    Cederfeldt, Mikael
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Variant Design Automation: Strategy and Procedure for Storing Design Process Information2004In: 2004 Proceedings of Design Engineering Technical Conference & Computers & Information Engineering Conference: DETC2004, September 28 - October 2, 2004, Salt Lake City, Utah, USA., 2004Conference paper (Refereed)
    Abstract [en]

    When creating a design automation system for a mature product, there already exists a complete and functional product design, and the task is to retrace the initial design process to find the input parameters, algorithms, rules, relations and solution strategies (design process information) that govern this initial design.

    This paper presents strategies and procedures for retracing, naming, classifying and storing the design process information governing the design variables of a mature product design, seen from a CAD representation perspective. Emphasis is on the strategy for storing the design process information for use with the CAD representation, as well as system transparency and efficient reuse of the documented and stored information.

  • 110.
    Cederfeldt, Mikael
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Design Automation Systems in SMEs: Current State, Potential, Need and Requirements2005In: Engineering Design and the Global Economy: Proceedings of the 15th International Conference on Engineering Design, August 15-18, 2005, Melbourne, Australia., 2005Conference paper (Refereed)
    Abstract [en]

    To ensure and improve the competitiveness of SMEs acting in an environment of distributed engineering and globalisation, four important factors are low cost, short lead-time, improved product performance, and the possibility to adapt products to different costumer specifications. One way of gaining these competitive advantages is to adopt an approach where products are based on prepared design. If some of the work related to these products and design tasks are automated, the design process can become more effective and efficient. This allows for shortened lead-time of product designs, cost estimates (Elgh and Sunnersjö, 2003), more optimised product designs, and customer tailoring, while giving the designers more time for creative problem solving. Companies have to consider the advantages of design automation, its realisation and implementation, as well as its applicability. Other issues of importance are: scope of implementation, how far to push the automation level, procedure for development, identification of information needed, definition of information models (Elgh, 2004), strategy and procedure for handling and storing design process information (Cederfeldt, 2004), selection of suitable application software (Amen et al, 1999), initial cost, maintenance cost, and the use of internal and external expertise. To support companies in choosing appropriate type and level of design automation, there is a need to address the important questions about potential, wishes, requirements, constraints and actual need of design automation. This paper addresses these questions from a SME standpoint. Other issues addressed are the current state of design automation in industry and the companies’ views regarding some important aspects and criteria of design automation characteristics, realisation and implementation.

  • 111.
    Cederfeldt, Mikael
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Sunnersjö, Staffan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Solid Modelling with Dimensional and Topological Variability2003In: Research for Practice - Innovations in Products, Processes and Organisations: Proceedings of the 14th International Conference on Engineering Design, August 19 - 21, 2003, Stockholm, Sweden., Glasgow: The Design Society , 2003Conference paper (Refereed)
    Abstract [en]

    With the advent of commercial solid modelling systems some fifteen years ago, the opportunity for three-dimensional parametric geometry was opened to industry. Today solid modelling systems are the dominating CAD tool among advanced engineering companies, but despite the time and money saving implications, industry has been slow to exploit the parametric capabilities of these systems (Amen and Sunnersjö, 1996).

    One reason for the slow adoption of parametric modelling is that originally many solid modellers suffered from lack of stability under parametric changes. This situation is now changed and if a model in a modern CAD system collapses, this is usually due to modelling deficiencies rather than numerical failures. Straightforward dimensional variations rarely cause any problems. However, to fully exploit the parametric capability for complex features with a variable topology, there is a need for a systematic approach to build stable and purposeful parametric models.

    The purpose of this work is to discuss how different modelling approaches relate to the ease of use and robustness of the CAD model in terms of creating variants and product families. We use the term Design for Variability, DFV, for a modelling approach that ensures that parametric models are well suited for variation design.

  • 112.
    Cenanovic, Mirza
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization. Jönköping University, School of Engineering, JTH, Product Development.
    Hansbo, Peter
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Larson, Mats G,
    Umeå University.
    Minimal surface computation using a finite element method on an embedded surface2015In: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 104, no 7, p. 502-512Article in journal (Refereed)
    Abstract [en]

    We suggest a finite element method for finding minimal surfaces based on computing a discrete Laplace–Beltrami operator operating on the coordinates of the surface. The surface is a discrete representation of the zero level set of a distance function using linear tetrahedral finite elements, and the finite element discretization is carried out on the piecewise planar isosurface using the shape functions from the background three-dimensional mesh used to represent the distance function. A recently suggested stabilized scheme for finite element approximation of the mean curvature vector is a crucial component of the method.

  • 113.
    Ceschini, Lorella
    et al.
    University of Bologna, SMETEC Department.
    Boromei, Iuri
    Morri, Alessandro
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Microstructure, tensile and fatigue properties of the Al–10%Si–2%Cu alloy with different Fe and Mn content cast under controlled conditions2009In: Journal of Materials Processing Technology, ISSN 0924-0136, E-ISSN 1873-4774, Vol. 209, no 15-16, p. 5669-5679Article in journal (Refereed)
  • 114.
    Ceschini, Lorella
    et al.
    University of Bologna.
    Boromei, Iuri
    University of Bologna.
    Morri, Alessandro
    University of Bologna.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Component Technology.
    Svensson, Ingvar L.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Component Technology.
    Tensile and fatigue behaviour of an AlSi10Cu alloy cast under controlled solidification conditions2008Conference paper (Refereed)
  • 115.
    Cheung, Ching Chi
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Semi-automated process planning and cost estimation of turned components based on CATIA V5 Machining2008Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
    Abstract [en]

    To be more competitive in the market, many companies are trying to speed up the quotation process and quote more attractive prices. Therefore, they have identified a need for support in the quotation process in order to reduce the quotation lead-time and ensure a higher level of accuracy in the cost estimations. The Quotation Calculator, an application program, has been developed as part of the degree thesis which was carried out at AB Norrahammars Mekaniska Verkstad, NMW 2006/07. This Quotation Calculator can be operated to calculate the material and manufacturing costs of a new product.

    NMW has recently acquired licenses for CATIA V5, Dassault Systems, for the purpose of making process planning and NC-programming more efficient. NMW wants to generate the data needed from the machining module for the cost calculations. Hence this project was initiated in order to extract data from CATIA V5 for further use in Quotation Calculator or other computer system in NMW.

    This work has resulted in a system developed with a common hosted programming language to extract and transfer information. The system retrieves model geometry from CAD and information on process planning from CAM, then matches the information in the application for the purpose of cost estimation. The system once developed, is supposed to be used for every new product. For this approach, the relationship of the data from CATIA V5 and the Quotation Calculator has been analyzed.

    Within this thesis, the focus is on production cost estimation. The method used here is programming in Visual Basic Editor to extract information from the machining module in CATIA V5 and then import them to Microsoft Excel. With standard operations, tables of data and several inputs, the cost calculation and hence the quotation process can be automatically implemented. This work has been generated with the Quotation Calculator. With the correct input data to process planning and this new quotation system, the machining time and the costs can be estimated more accurately and easier. The time and cost information is made available for decision making. As a result, the lead time for the quotation process will be shortened and a relatively more attractive price can be quoted to the customers.

  • 116. Christensen, XP.W
    et al.
    Klarbring, A
    Pang, J.S.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Formulation and comparison of algorithms for frictional contact problems1998In: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 42, no 1, p. 145-173Article in journal (Refereed)
  • 117.
    Constantin, Therese
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Konceptframtagning av testinstrument för vattendetektion baserad på MIP2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Water is vital for all life on earth. But it can also be dangerous, even fatal, if it is polluted water. 60 percent of child mortality can directly be deduced to dirty water. Not only developing countries are affected, even in the western world epidemics are breaking out by partake or bathing in dirty/polluted water.

    MIP, Molecularly Imprinted Polymers, is a biosensor technology that can provide faster and more reliable response than the current methods of water analysis. It is also cheaper and due to that more samples can be taken and analyzed. These three variables can reduce the number of patients due to polluted water are detected faster and appoint of necessary measures can be done faster.

    This project searches for the design of an automated sample tool based on MIP techniques. The Concepts must express innovation, high quality and clarity. The instrument should be used both in laboratory and in the field.

    The project has resulted in one concept. The concept is based on the one construction of internal components that is as low height as possible (20 centimeters) and is slightly wider than its depth (40 vs. 30 centimeters). MIP-and NIP containers are located by one of the short side and the battery is near the edge of the front side. The placement is designed to facilitate the loading and exchange.

    The concept answers against all of the demands and two of three wishes.  Also the concept is designed after the further user. The further user has also been involved during the process of the concept design. The development of the concept start with the questions from the brainstorming “What will the user feel when they lay their eyes of the product/instrument and uses is?” The ides and thoughts were to ides sketches. They also used in the evaluation of the same sketches. The most exalting ides develop in to three concepts, and in evaluations, with help from further user, with kansei and discussions. The evaluation showed that one of the concepts was adaptable for further development.

    The concept is smooth and has areas for hold. The user is self looking and searching for the optimal hold. The instrument has none parts that extend from the body and can damage the user. The instruments components that the user need to exchange is placed in a box that by automatic shouts out. The aces to this I controlled by a touch screen. One the touch screen is a hand scanner that is used to lock and unlock the instrument. With a window the process of the analyses is showed. That rice the reliability, lift the functions, give a high-tech and a hero feeling and are fun for the users.

  • 118.
    Corselli, Rebecca
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Al-Shawi, Sajjad
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Prototyp av växelspaksknopp CMG32016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study has taken place in Mullsjö at Kongsberg Automotive (KA). The purpose of

    the study was to evaluate how to construct an easy mountable gearknob to the lowest

    cost based on design and functionality by using the techniques of concept generation

    and sifting. The knob is intended to be integrated in a Shift-ByWire shifter and generate

    prototypes through SLS.

    Researchers followed a concept study methodology following an abductive approach,

    to generate an appropriate mechanical design for the gearknob. Concepts were formed

    by a brainstorming process, followed by weighing criteria for the knob and were

    finalised by evaluating the formed concepts using a Pughs Matrix constructed by the

    researches. Relevant literature of mechanical designs processes was reviewed to

    develop the theoretical framework. In addition, data was collected from Kongsberg´s

    computer system and unstructured interviews with employees within certain specific

    areas to gain additional understanding. In cooperation with supervisors, pros and cons

    analysis of cost, functionality and mounting capability were used to enable the

    researchers to draw recommendations for mechanical designs meeting the requirements

    of specification.

    The study resulted in several findings in relation to each research question. In general,

    a gear knob has been constructed using SLS that can be both used for mounting and

    demounting purposes. In addition, this construction met the specification of

    requirements by KA. The Printed Circuit Board (PCB) were constructed using the

    geometrics in the inherent components of the knob. The study further resulted in a

    leather gaiter that were constructed as a link between the dashboard and the knob.

    Results from this study imply that more screws would be used for mounting different

    components in the prototype phase, which will impact the view on criteria for

    forthcoming knobs and their mounting methods. In addition, data collection have also

    shown that snaps in chromium details easily break, which can also further question the

    use of chromium snaps for dismantling purposes.

    Finalised recommendations for the gearknob met the requirements of specification

    since researchers constructed the most simple mounting on the current surface design.

    Researchers conclude that these concepts are applicable and could be presented in a

    following prototype phase. However, if the knob is to be produced, researchers do not

    have enough support regarding the liquid injection moulding, which requires to be

    further considered. Materials will require the design constructed in this study to be

    modified.

  • 119.
    Dalslätt, Göran
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Konstruktion rörklammer2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This report describes the development process of a pipe clamp used on exhaust system for cars. It is made based on the manufacturers desire to improve and make the clamp easier to manufacture and to reduce its price to their customers. This should be done either by manufacturing the clamp in one piece without an expensive and work intensive welding process, or by generating ideas of how to develop a brand new type of clamp. Investigating the market for similar products was done to eliminate intrusion of other manufacturers’ patents but also to generate ideas. Making drawings of the many ideas gave a concept of three concepts called existing clamp in one piece, existing clamp by several pieces and innovation solutions. Some of these ideas were investigated further and were 3D modelled in pro-engineer and necessary drawing files were made to be used in the manufacturing of several prototypes. One of the solutions resulted in a prototype that was manufactured by handmade tools and the results of the tests was very positive. The clamp was strong enough to join the pipes together very well without breaking. It was manufactured in one piece and formed in five steps without any welding operations instead of the seven steps, including welding, that is used on the clamp today. The prototype requires 25 % more material and most of it is scrap from the cutting operation.

  • 120.
    Dautovic, Armin
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Karlsson, Artur
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Förbätringsförslag för höj- och sänkbara bordsben2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    At present, it has become increasingly common for the end user to vary their work position At present, it has become increasingly common for the end user to vary their work position during the working day. This is due to the fact that the worker is encountering repetitive activities for long periods of time, which can lead to various problems on the body. Variation and movement changes counteract positive fatigue and various problems that would hurt the body. From this a category of furniture that can be customized and changes after the user has grown forward and established itself in the furniture market. This candidate thesis takes place in the product development category and focuses on studying the economic and assembly consequences that may arise in connection with a design change. By studying the changes, it can be seen whether the changes will be economically justifiable, which is why the idea is to be implemented. The approach that the students chose to use was based on a preparatory study of the project, which then developed into concepts. These concepts were weighed against a product specification created at the preparatory study of the project. Once concrete evidence has been given that the requirements are met, a study on how the design can affect assembly and economy can be implemented. The goal of this project was to reduce the friction of the component by making a design change. A criteria that arose during the preliminary investigation is that the stability of the product shall not suffer when the friction is reduced and therefore a study was also made of stability after the design changes. The completed design change was then analyzed using observations, qualitative interviews, time studies, work measurements, analysis of flow charting, economic analysis and literature studies. The purpose of this analysis is to control changes that a structural change creates and to see what financial differences will occurring. By checking the assembly and the economic aspects of design changes, a profitable proposal will be reported to the company.

    The proposal that is presented in the project means that the most suitable concept that is calculated and tested in practice, turned out to be better than the current plastic-detail. Comparing the current plastic-detail and the concept it turned out that the total time on the montage reduced 3.55 %, removes the lubricant from the mount process, capacity increase with 4%, maintain current stability in the table, total costs savings by 66.4% and theoretical friction reduction by 57.14%.

  • 121.
    Dickèr, Jonathan
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Jonker, Marjo
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utveckling av bearbetningsmaskin för rullkedjor2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This project is about developing an existing machine that customizes roller chains. The old machine is manufactured and used by the Swedish transmission company Jens S Transmissioner. However, it turns out to be inadequate in many aspects, such as its safety guard and ergonomics. The aim of this thesis is to help Jens S to retrieve a new manufacturing plan for a machine that satisfies the operators and companies demands. The authors will not build the machine and more advanced machine parts such as power sources will be purchased from subcontractors.

    In order to achieve a clear image of what problems had to be solved the machine was carefully observed and issues were discussed with the operator. Out of these discussions five questions were formulated which act as guidelines throughout the project.

    Each question were attempted to be answered by creating a number of ideas that were conceived by using various idea generating methods. Three different possible concepts, which differed in level of complexity, were achieved using a morphological matrix.

    By applying different mechanical design processes and using tools such as FEA- studies and Computer Aided Design the construction and its different parts were developed and improved.

    After choosing one of the concepts and improve it even more the project resulted in a machine construction that managed to fulfill the problems and give improved work ergonomics and efficiency for the operator.

    Since the project was lead independently it successfully gave an increased feeling and understanding of mechanical engineering and product development. There has been a continuous effective co-operation during the whole process where both parts contributed with their own specific skills. However, various obstacles showed up. These obstacles have implied new insights such as many good ideas comes from developing other, and thus problems should be considered as an encouragement for improvement rather than a discouragement. 

  • 122.
    Dinh, Minh Thu
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Makaraan, Hassan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Framtagning av förebyggande underhållsplan: På tomgodsförsörjningen av rullpallar på Arla Foods Jönköping2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The pursuit for a greater competitiveness has brought changes in modern production, where there is an ongoing transition from labour-dependent production to an increased automation in production plants. The increase of automation and the advance of technology has meant that production equipment has become more sophisticated and complicated to maintain.

    The changes have brought greater demands on the dependability of production equipment in order to meet customer requirements and also maintain competitiveness. The execution of an effective maintenance has become an important factor in order to achieve a dependable production plant.

    Arla Foods Jönköping’s dairy plant works with both operator and specialist maintenance, where measurement on equipment are carried out and preventive maintenance plan has been developed. On the other hand, the empty-packaging-supplying system, which supplies empty cargo carriers to the packaging machines and to the cold storage warehouse, lacks a maintenance plan and therefore only emergency maintenance work are applied. The purpose of this study has been to develop a preventive maintenance plan for the empty-packaging-supplying system of rolltainers. This has taken alongside an interference analysis where interferences were mapped and then a proposal for action was devised.

    All data was obtained in Arla Foods Jönköping’s dairy plant, where the methods that were used are observations, interviews, workshops and document studies. Literature studies, that treats basic maintenance principles and Total Productive Management, TPM, where also performed in order to provide a theoretical basis for the study.

    The analysis covers a compilation of interferences, through a Pareto chart, where those interferences which affected the supplying system most could be identified. The analysis showed that 49,3 percent of all the interferences was due to rolltainers that got stuck on curves and defective rolltainers that went through controls and caused a stop of the supplying system. An analysis was also made of the current maintenance work and how the lack of a maintenance plan affects the supplying system.

    Based on the analysis, a proposal for action was devised for the two most prevalent interferences and a preventive maintenance plan for the supplying system was developed. With the help of literature studies, maintenance staffs competencies and the suppliers maintenance guide, a preventive maintenance plan was developed, where great emphasis was put on to not introduce an alien working method. Since the whole production works with RIS-boards and the personnel are familiar with them, it was viewed as a suitable working method. The maintenance plan consists of scorecards, RIS-cards, with instructions for each area, and will also serve as a checklist for the maintenance work to take place at the right time. In order for the maintenance work to be fulfilled a delegation of responsibility for the maintenance work has been made. The RIS-boards enables error reports to be made in a proper way, delegate responsibility and enables documentations of performed reparations.

    Furthermore, Arla Foods Jönköping is recommended to integrate the newly developed maintenance plan with SAP, which is an enterprise resource planning software, which the maintenance department is currently working with to perform preventive maintenance on the packaging machines. Also, an implementation of TPM should be applied throughout the whole organization, where the newly developed maintenance plan is considered to be a basis for achieving interference-free production through a structured approach and create a commitment in the organization to work together for continuous improvement efforts. In the long term, consideration should be given to reconstruct the rolltainer tracks and create more direct transportation tracks to avoid curves and the interferences they create.

  • 123.
    Dini, Hoda
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Andersson, Nils-Eric
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Jarfors, Anders E.W.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Effect of process parameters on distortion and residual stress in high pressure die cast AZ91D components after shot peening and paintingManuscript (preprint) (Other academic)
  • 124.
    Dini, Hoda
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Svoboda, A.
    Andersson, Nils-Eric
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Ghassemali, Ehsan
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Lindgren, L.
    Jarfors, Anders E.W.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Modeling the Deformation Behavior of As-Cast AZ1D Including the Effect of The Cast Microstructure2017In: Proceedings of PLASTICITY ’17: The Twenty Third International Conference on Plasticity, Damage, and Fracture, 2017, p. 37-39Conference paper (Refereed)
  • 125.
    Dissler, Per-Inge
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Lagerqvist, Simon
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Nyutveckling av Nålträdarsystem2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This thesis work is performed on VSM Group Ltd in Huskvarna that produces sewing machines under the trademarks Pfaff and Husqvarna Viking. On these sewing machines is an application that helps the user to thread the needle. The aim with the work has been to study today's applications on VSM and their competitors' sewing machines in order to since developing a new Needle-threader that divides itself from all the ones used today. The objective with the work has been an entire new concept with an operational prototype.

    As a base the competitor analysis was used where today's applications was studied in order to identify positive and negative aspects of these. This led to a number off “concept families” where different variants off the same ideas were collected and evaluated. The choice fell on the concepts with air suction that was regarded as the most unique and viable.

    Different applications in order to create air suction were tested and the one with best results were chosen for a prototype.

    The final prototype sucks the thread through the needles eye, using a mouthpiece that is positioned behind the needle. The suction is created when a diaphragm pumps from the air from an airtight shell whose only opening is the mouthpiece.

    Of those concepts that have been tested in this thesis work it’s this solution that is most realistic to be used in future sewing machines.

  • 126.
    Diószegi, Attila
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Evaluation of eutectic growth in grey cast iron by means of inverse modelling2003In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 16, no 1-3, p. 301-306Article in journal (Refereed)
    Abstract [en]

    Computer simulation of casting becomes a valuable tool for developing advanced materials and casting components. Recent investigations and validation work on simulated cast components reveal the necessity of reliable analyses methods to determine solidification behaviour and to extract parameters for kinetic models to use at simulation of complex cast iron materials.

    The paper will present an inverse modelling method for determination of eutectic growth. The method include an experimental part proper to investigate simultaneously the solidification at three different cooling rates while the cast material has the same metallurgical origin, and a computational part for calculation of grow kinetics. Validation of the inverse method is made together with simulation. The inverse modelling of eutectic growth in grey iron indicates that chemical composition, type and amount of inoculants and cooling condition are strongly influencing the eutectic growth condition and gives different eutectic growth coefficients. By invoking a generalized KJMA* equation, the shape of the growing eutectic interface can be predicted. Deviation from perfectly spherical growth in real solidification cases is the source of variation of eutectic growth coefficients. The results of the inverse model are valuable to simulate differences in solidification behaviour in differently treated grey iron melts.

    * KJMA is the abbreviation of the name of the famous scientists Kolmogorow, Johnson, Mehl and Avrami who developed and applied the equation.

  • 127.
    Diószegi, Attila
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Microstructure and tensile property simulation of grey cast iron components2004Report (Other academic)
  • 128.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Dugic, Izudin
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    The Mechanism of Metal Expansion Penetration in Gray Cast Iron2006Conference paper (Refereed)
  • 129.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Dugic, Izudin
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Metal Expansion Penetration on Concave Casting Surfaces of Grey Cast Iron Cylinder Heads2007In: Transactions of the American Foundry Society, Vol. 115, p. 609-615Article in journal (Refereed)
  • 130.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Dugic, Izudin
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Penetrationsfehler an konkaven Gussteiloberflächen von Grauguss-Zylinderköpfen (Penetration errors casting concave surfaces of grey cast iron cylinder heads)2007In: Giesserei-Praxis, ISSN 0016-9781, Vol. 58, no 11, p. 450-454Article in journal (Other academic)
  • 131.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Elmquist, Lennart
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Orlenius, Jessica
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Dugic, Izudin
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Defect Formation at Casting of Gray Iron Components2009In: Proceedings of the Carl Loper Cast Iron Symposium, Madison, Wisconsin, US, 2009Conference paper (Refereed)
  • 132.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Elmquist, Lennart
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Orlenius, Jessica
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Dugic, Izudin
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Defect Formation of Gray Iron Casting2009In: International Journal of Metalcasting, ISSN 1939-5981, Vol. 3, no 4, p. 49-58Article in journal (Refereed)
    Abstract [en]

    Cast iron is one of the oldest technical alloys used for creating objects. Foundrymen from the very beginning of casting was fighting to avoid casting defects. In the beginning a successfully performed casting was associated with witchcraft. Cast component producers suffer yearly substantial expenses due to rejecting or repairing castings. The present work will summarize research efforts to understand formation mechanisms of defects, performed in collaboration with Swedish foundries during the last years. The presented work will focus on defects, specific casting of gray iron components. Studied defects are gas porosity, shrinkage porosity and metal expansion penetration. Novell experimental set up has been developed or existing methods has been improved to study defect formation mechanisms. Today we can realize that casting without defects are possible only by approaching the defect formation mechanism with multidisciplinary science.

  • 133.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Fourlakidis, Vasilios
    Swerea - Swecast.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Fracture Mechanics of Gray Cast Iron2010In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 649, p. 517-522Article in journal (Refereed)
    Abstract [en]

    The fracture mechanism of gray cast iron was investigated on tension loaded samples produced under different conditions. The parameters studied included the graphite morphology, the carbon content, the inoculation and the cooling condition. The observations made reveal the role of the microstructure on crack propagation. The cracks were found to always propagate parallel with the graphite flakes. The interaction between the metallic matrix precipitated as primary austenite and graphite has been interpreted by a simplified model of the austenite reinforced eutectic cell. The geometrical transcription gave a standard crack component configuration with known mathematical solution. The microstructure observed in the experiments has been analysed by means of a novel interpretation. The fictitious stress intensity at yield and the fictitious maximum stress intensity at failure are strongly related to the relative shape of the eutectic cell and the fraction primary austenite. A different slope is observed for the material cooled at high rate when the precipitation of primary carbide reduces the stress intensity. The observed relations indicate that the tensile strength of the grey cast iron is the result of the collaboration between the toughness of the metallic matrix precipitated as primary austenite and the brittleness of the graphite phase. The shape and distribution of the primary austenite and graphite can be influenced by chemical composition, by inoculation or by the cooling condition, but they will maintain equilibrium with respect to the stress intensity.

  • 134.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Fourlakidis, Vasilios
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Microstructure and tensile properties of grey cast iron2004Report (Other academic)
  • 135.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Hattel, Jesper
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Inverse thermal analysis method to study solidification in cast iron2004In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 17, no 5, p. 311-318Article in journal (Refereed)
  • 136.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Liu, Kalle Z
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Inoculation of Primary Austenite in Grey Cast Iron2006Conference paper (Refereed)
  • 137.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Liu, Kalle Z
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Inoculation of Primary Austenite in Grey Cast Iron2007In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 20, no 2, p. 68-72Article in journal (Refereed)
  • 138.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Millberg, Adam
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Microstructure evaluation and simulation of mechanical properties of a cylinder head in cast iron2001In: The science of Casting and Solidification, Brassó-Brasov, Romania, 2001, p. 269-277Conference paper (Refereed)
  • 139.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Interpretation of Solidification by Thermal Analysis of Cooling Rate2005In: Transactions of the Indian Institute of Metals, ISSN 0019-493X, Vol. 58, no 4, p. 611-616Article in journal (Refereed)
  • 140.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Inverse kinetic analysis method to study eutectic growth2005In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 18, no 1, p. 41-45Article in journal (Refereed)
  • 141.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Lemezgrafitos öntöttvas dermedési mecanizmusai2007Conference paper (Other academic)
  • 142.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    On the problems of thermal analysis of solidification2005In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 413-414, p. 474-479Article in journal (Refereed)
  • 143.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Wessén, Magnus
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Measurement and simulation of thermal condition and mechanical properties in a complicated shaped cylinder head cast in grey iron2000Conference paper (Refereed)
  • 144.
    Diószegi, Attila
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Wessén, Magnus
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Measurement and simulation of thermal condition and mechanical properties in a complicated shaped cylinder head cast in grey iron2001In: Indian Foundry Journal, Vol. 8, no 4Article in journal (Other academic)
  • 145.
    Doberauer, Andreas
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Zeng, Kent
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Toolflex Rörfäste2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 146.
    Dohlmar, Gustaf
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Åstrand, Emma
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Johnsson, Jimmie
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Kalkylverktyg För Sågklingor2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    The purpose of this report is to survey Swedex AB’s production costs and to gather all info into a manageable calculation tool. This was made by time and motion studies, interviews of the personnel. All factors were gathered into an Excel chart.

    The calculation was made according to an additional-charge-method that was considered to satisfy Swedex AB’s goal. This makes a complete-cost-estimate which is important when the selling price should cover the production costs. The blades were divided into different populations to facilitate the calculation work. The division was made with the production cost in consideration to minimize the risk of losing parameters.

    The time and motion study, which is the basis of the calculation, was obtained by the group and gave insight of the saw blade production. Here it was discovered, what was said to be a bottleneck was not the case.

    Swedex AB has a great amount of products in labour, this in opposite to the “just in time”-philosophy, but Swedex AB see’s this as a resource. This is seen as a utilization increaser, to keep up the production rate.

    Swedex AB has a lot of old machines, but these have to be part of the calculation while they in a near future will be reinvested with new machines. An adjustment has been done to consider purchase price, second hand price and service/repair costs.

  • 147. Dugic, Izudin
    et al.
    Diószegi, Attila
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Metal Expansion Penetration on Concave Casting Surfaces of Grey Cast Iron Cylinder Heads2006Report (Other academic)
    Abstract [en]

    Cylinder heads have an extremely complex shape with large areas of concave casting surfaces. The concave casting surfaces are often associated with metal expansion penetration problems or other surface defects, e. g. surface shrinkage. The defects cause high production costs due to component rejection and increased fettling time. This report presents an investigation of the microstructure in grey cast iron close to the sand-metal interface affected by metal penetration in a complex shaped casting. The dominant penetration defect observed in the cylinder heads was expansion penetration. Even pre-solidification penetration and sand crack defects were observed. The microstructure found in the non penetrated areas is typical for solidification of grey iron cast in sand moulds.

  • 148. Dugic, Izudin
    et al.
    Diószegi, Attila
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    The Influence of Inoculation on the Metal Expansion Penetration With Respect to the Primary and Eutectic Solidification2005Report (Other academic)
    Abstract [en]

    The mechanism of metal expansion penetration of grey cast iron components is dependent on both solidification anomalies at the metal – mould interface and the inclination of the sand mould to permit the metal liquid to penetrate between the sand grains. The present work utilizes the latest development of primary austenite inoculation in combination with classic eutectic inoculation to limit the metallurgical contribution to metal expansion penetration. A solid shell containing the primary austenite dendrite network constitutes the barrier between the liquid metal and mould interface. Inoculants of both the primaryand eutectic phase control the permeability of the dendrite network.

  • 149.
    Dugic, Izudin
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    An investigation of the effect of inoculants on the metal expansion penetration in grey iron1999In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 11, no 5, p. 333-338Article in journal (Refereed)
  • 150.
    Edholm, Anton
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Fredriksson, William
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Portabel Laddningsstation för Friluftsliv: Produktidé för laddningstillbehör till smartphone2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report processes the product development regarding a portable charging station for handheld devices. It has been done in collaboration with the R&D-department on Thule Group. The thesis aims to project an idea for a product in the Bags & Outdoor segment and will be presented through CAD and renderings.The fundamental problem behind the report is that the lack of charging possibilities when hiking in nature, which can lead to concerns that the device’s battery will discharge. This can be fatal in the event of an accident where rescue services should be invoked. It is also important that the charging station can perform as a protective casing to withstand external shocks and ingress of dust and moisture.The thesis background stems from a pilot study where a market analysis has been made to create an understanding of what the market wants form this kind of product. To find possible market segments a competitive analysis has been made. The theory has been found in course literature where methods that are known to the authors have been chosen. Furthermore, a concept development has been done where sketches and simple CAD have generated relevant decision matrices. This is to see which concepts are feasible or not.The thesis has resulted in a protective hard case that also charges the device through a wired connection. The power supply comes from an external charger or solar panel that is mounted on or inside the backpack. The hard case is suspended around the neck with a loop, where in the back, an USB-port is located to simplify charging capability.This thesis will serve as a basis for further development of the product. To realize the product, Thule must develop production documentation and make an adequate analysis regarding IP-classification and materials.

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