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  • 51.
    Bellét, M
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Bay, F
    Chenot, J
    Decultieux, F
    Menai, M
    Levaillant, C
    Schmidt, P
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Thermomechanics of the cooling stage in casting processes: three-dimensional finite element analysis and experimental validation1996In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 27, no 1, p. 81-99Article in journal (Refereed)
  • 52. Bellét, M
    et al.
    Menai, M
    Bay, F
    Schmidt, P
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Finite Element Modelling of the Cooling Phase in Casting Processes1993In: Proceedings of Modelling of Casting, Welding and Advanced solidification processes-VI, Palm Coast Florida, USA, 1993Conference paper (Refereed)
  • 53.
    Bengtsson, Magnus
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Hybrid ITX: Kompakt och mångsidigt datorchassi2011Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 54.
    Bergkvist, Sandra
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Läbom, Malin
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Motordrivet höj- och sänkbart TV-stativ: Motor-driven rise- and sinkable TV-stand2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This master's thesis has been performed in cooperation with the company ROL Ergo which design and manufacture motor-driven rise- and sinkable desks. The company wants to expand their assortment by marketing motor-driven rise- and sinkable TVstands towards the public service. The stand shall be designed with the same technical solutions and principles as the company already applies. The mission was given out as a master thesis to Jönköping University. The authors has through a given requirement specification and own field studies on the market made the foundation for the development of the TV-stand. Through different well known working methods the work has been charted, planed in detail and supporting in decisions of greater and smaller concept selections.

    The requirements and desiderates from potential costumers has accurately been worked thru to be fulfilled one at a time and they have also been supporting in decisions of technical and designable shaping. The constructions is build up with support from predetermined parts that was given from ROL Ergo and thru investigations in the ergonomic area, practical laboratory work, computing and discussions with the mentor on the company. A rough construction was developed as a base for the whole product and from that upcoming problems could be discussed and solved to supply the main part of the requirements and desires. After that piece by piece was designed in a detail construction phase to work together in the end as an overall solution. The result becomes a mobile motor-driven TV-stand that can take TVs up to 42". The stand is ergonomically suitable for both a sitting and standing audience. The TV-stand is designed to fit well in public services and is therefore styled discreet and sobered with few visible details.

  • 55.
    Berglund, Alexander
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Bondesson, Martin
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Kapacitetsökning av en kemisk ytbehandlingsprocess2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Utveckling av maskiner och dess kringutrustning för tillverkningsindustrin medför många gånger att de blir mer avancerade och kan producera fler detaljer med färre operatörer. Detta fenomen återspeglar sig många gånger i kostnaden för dem. Automatiseringen av tillverkningsindustrin bidrar till att vi gör oss mer beroende av utrustningen, samtidigt som det medför att det blir höga kostnader för företag att köpa sig mer kapacitet i form av exempelvis flera parallella system.

     

    Detta examensarbete är resultatet av en förfrågan av Amtek Components Sweden AB. Denna fabrik, som är benägen i Västra Götaland, är en tillverkande verksamhet av navmoduler, bromsskivor och vevstakar till automotive-kunder världen över.

     

    Amteks prognoser tyder på en ökad efterfrågan på bland annat navmodulerna. De har identifierat att ytbehandlingsprocessen är en teoretisk flaskhals och därmed begränsar deras möjliga kapacitet av navmodulerna.

     

    Syftet med detta arbete är att generera förbättringsförslag samt riktlinjer för Amtek Components Sweden AB med avseende på den utrustningen de redan använder idag. Detta på grund den prognostiserade framtida efterfrågan och därmed för att hjälpa dem att uppnå en högre kapacitet av navmodulerna. Eftersom Amtek först och främst är intresserade av att förbättra den befintliga utrustningen, så har författarna har valt att fokusera på att undersöka möjligheterna att reducera förlusterna som processen lider av och på så vis öka utnyttjandet av utrustningen. Författarna har även valt att undersöka om de nuvarande enskilda stegen i ytbehandlings-processen är tillräckligt korta för att klara av en ökad takt.

     

    En fallstudie har utförts där data har samlats in genom främst intervjuer, observationer och dokument. Det har även utförts en litteraturstudie för att öka kunskap inom vissa områden och för att komplimentera kunskapsbasen.

     

    Amtek för redan idag en kontinuerlig driftsuppföljning på deras ytbehandlingsprocess. Den har varit kritisk i arbetet med att identifiera förlusterna processen lider av. Denna data har varit kritisk för att kunna identifiera förlusterna och grundorsakerna till dem.

  • 56.
    Berglund, Elisabeth
    et al.
    Jönköping University, School of Engineering.
    Birgersson, Jörgen
    Jönköping University, School of Engineering.
    Cederfeldt, Mikael
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Ten+ Years of Successful Workplace Learning through Host Company Collaboration2008Conference paper (Other academic)
    Abstract [en]

    For a period of more than ten years a very successful Host Company Program has been running at the School of Engineering at Jönköping University (JTH), Sweden. This program enables close collaboration between the university and its staff and the 500 regional host companies (HCs) who support the quality assurance of the engineering education given at the School of Engineering.

    With the introduction of the principles of CDIO at JTH, the host company program and the engineering methodology course was seen as a pre-existing building block of CDIO. This paper will explain in more detail how the HCP is orchestrated at JTH as well as how it is perceived by university staff, the engineering students, and the HCs. Also, how the HCP fits the principles of CDIO will be discussed further together with what is needed to be refined within the HCP.

  • 57.
    Bergqvist, Björn
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    What is the meaning of a sandbox2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis project uses various Industrial design methods to create a concept that will evolve a sandbox into a more versatile and interesting playing area. By using parts that can be attached to the frame of the sandbox many different versions can be built to suit different demands and needs. The concept also uses lights and decorated panels to make the sandbox more interesting and visible in today's colorful playgrounds.

    The project is based on the meaning different stakeholders could have in the product. Research has shown that products made with the help of stakeholders has a better chance to be realized. The findings from research by interviews, fieldtrips and library studies were used as reference when sketching and building sketch-models. Sketching is used both for ideation and for explanatory pictures and has been a big part of the project. Many of the sketches and photos can be seen in the report and in the attachments.

  • 58.
    Bergqvist, Björn
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Blomström, Johan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utveckling av en mättillsats till kökskran2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report contains the concept development of measure device for a kitchen tap, the basic function is to measure the amount of water. The purpose with this product is to replace the current use of a handheld cup when measuring water, but since the measuring cup still fills its function much of the report is focused on using modern technology with innovative solutions to find unexpected needs. The report is based on the writers own idea and the need for such a product, the report has been conducted without contractor with guidance from School of Engineering at Jönköping University.The report describes how the process of an idea to a finished concept focused on the design process. The implementation involves numerous concepts that have been developed with the help of methods like brainstorming and build-test-method to later be screened of with different methods for screening to result in a final concept.The final concept resulted in a measuring device that blends well in to the modern kitchen. The concept has been developed with the idea that form should follow function. The concept was designed to be both easy to install and to use. The result is presented with renderings and a material presentation model.

  • 59.
    Bergstedt, Malin
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Daniel, Lidberg
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Analys och kartläggning av tillverkningsprocessen: Fastställning av produktionen och uppdagande av produktionsstörningar på Saab Avionics Systems2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 60.
    Bergström, Adam
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Bergvad, Jonas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Konceptframtagning av icke kundanpassat isolerat lasthus2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This report describes the bachelor thesis project conducted by Adam Bergström and Jonas Bergvad at the School of Engineering at Jönköping University 2017. The thesis was carried out on behalf of Portsystem 2000 AB in collaboration with Semcon AB as a final part of the Bachelor of Science in Mechanical Engineering with specialization in Product Development and Design.

    The assignment was to develop a non- customized insulated loadhouse at concept level. A loadhouse is the link between the warehouse and the truck, used to protect the goods from external climate during loading and unloading. The company’s customers who are dealing with temperature sensitive products require an insulating function of the loadhouse, and therefore the company formulated this degree project with focus on product development.

    With a broad starting point, a pilot study was carried through at the beginning of the project to investigate the requirements and wishes that were put on the product by the company’s customers. With a defined requirement specification, the product development process progressed and resulted in a concept of a non-customized insulated loadhouse that Portsystem 2000 AB can use in further development of their future products.

    The insulating function of the loadhouse could be met by using the same wall and roof elements previously used by the company and therefore the project focused on optimizing the construction of the product by keeping down the amount of components and striving for a low installation height.

    Many thanks to Åsa Dencker, Johan Pelmas and Johan Örtlund for guidance during the project.

  • 61.
    Bergström, Gustav
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Zetterqvist, Dennis
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utformning av hållare för inköpslista: I samarbete med Sigma Industry2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 62.
    Berthou, Lina
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Studie av internt materialflöde vid Volvo Pentas fabrik i Vara2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    Within today’s organizations there is continual development work to increase efficiency and the power to compete at the market. Production development with focus on continual improvements constitutes an important part of the daily work within a lot of organizations today.

    The purpose of this study is to contribute to a part of the development process that Volvo Penta factory in Vara has in mind. A description of the current situation was compiled by mapping the internal runnings and material flow throughout the factory. A new suggestion for a layout and a comparison with the current situation will assist with creating a factual basis for the development of a new goods reception.

    A study was made where the volumes and the quantity of the daily arrival goods were settled. Another study mapped the fork lift - and the moped traffic of the factory. The quantity and the volume of the material that was transported were also settled. The layout that was proposed was used during the comparison.

    The compilation of the description of the current situation showed that the fork lift truck constitute 40 % of the total number of runnings. Empty box running and empty running constitute 15 % and 45% of the transportations respectively. The material-, empty box- and empty runnings of the moped are divided 40 %, 19 % and 41 %.

    The result of the comparison of the existing with the planned goods reception showed that the new solution would decrease the use of fork lift truck transportations by as much as 16 %. The equivalent rate for the moped runnings would be 3 %.

    The conclusion of the studies is that a new goods reception, placed close to the start point of the process, would make a contribution to a streamlining of the internal runnings in the factory. It was also established, by the layout flowchart, that the material- and the process flow would be more efficient.

    The aim of the project was achieved through the extensive studies that were made. All of the transport stretches can now be studied in depth according to which factors are seen to be most important. The study contains separate information from each driver. A closer review by each driver is therefore suggested during the continued work. The development of new transport stretches where coordinated runnings may decrease and empty runnings may decrease is possible in order to reach even greater efficiency.

  • 63.
    Bielsa, Germán
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Redesign of the interior of the JU solar car2017Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    This thesis analyzes the interior of the solar car, used by the JU Solar Team, to improve the user experience in terms of user interaction and ergonomics.

    Following the Design Thinking methodology, it starts with a research phase to understand how the user interacts with the car and the elements required for this interaction during the race. It also studies the dimension of the actual interior and the anthropometric factors, some changes are proposed for a more efficient use of the space.

    The next phase explores new buttons and configurations for the steering wheel. The use of prototypes and sketches leads the development of the ideas, which are further developed and defined, including the graphical design and the dimensions of the interior. In the findings, the redesign of the steering wheel and interior is shown in several renders with an explanation of the final design decisions, which can be summarized in:

    A new shape for the steering wheel where most of the buttons have been added with new shapes and colors. The emergency buttons and light indicators have been allocated on a central control panel. The user has access to the buttons without releasing the steering wheel and the dimension of the canapé has been reduced thanks to a more efficient use of the space.

    As a part of the thesis a full scale model of the steering wheels and a 1:10 scale model of the interior is provided.

    This thesis solves some of the problems in the actual design of the solar car and explore some of the important factors in user interaction. A human-centered design approach to a project usually driven by the performance of the car and not the user experience.

  • 64.
    Binadam, Zulkiflee
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Bergeling, Gustav
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Övergångsfasen till ISO 9001:2015 i ett marknadsledande företag2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The thesis work has been carried out in a market-leading company in the painting industry, where the main focus of the report focuses on which areas in the company that needs improvement in order to certify itself against ISO 9001:2015. The production department has been reported as an independent company within the company in order to apply the requirements of the standard that fall on management.

    The report has addressed the problems that most companies have in the transition process to ISO 9001:2015. The issues are formulated to provide answer to how well the studied company meets the requirement at current situation and then present a gap-analysis of what needs to be done to meet the requirements that are not met. These analysis leads to a result where key areas of improvement within the company are presented together with proposals to meet the requirements of the ISO-standard.

    In order to make the thesis as credible as possible, several different methods have been used and evaluated, to then make a fair assessment of the company’s current situation. The methods presented in the report include, among other things, a method of self-assessment, where the authors have received inspiration from previous thesis works, as well as interviews with an audit firms and relevant staff at the company. An observation/survey has also been conducted on the operators in the company to gain an insight of how they feel about the company’s work with ISO-standards.

    The report's discussion and conclusion presents the areas in the business that the company is lacking and suggests how the company should develop these areas. The key areas identified are: continuous improvement, leadership, process orientation and risk-based thinking. These areas have been analyzed by the authors as the most deficient areas that the company should further develop and proposals for how to develop these areas have been presented. The action proposals are based on the authors' knowledge and experience, where the proposals were developed in consultation with supervisors and staff at the company. The conclusion also evaluates the suitability of methods and tools for implementing ISO 9001: 2015 in an organization.

  • 65.
    Bjärkvik, Emil
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Bankelius, Jesper
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Implementering av standardoperationsblad2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Hur kan en produktionsledare säkerställa att standardoperationsblad följs och uppdateras? Denna fråga ställdes inledningsvis i detta examensarbete, som är gjort i samarbete med Saab Aerostructures i Linköping. Bakgrunden till arbetet är att det i dagsläget finns flera olika sätt att utföra arbetsmoment på. Genom att göra på olika sätt uppstår variation av säkerhet, kvalitet och cykeltid.

    Syftet med examensarbetet var att utforma ett standardoperationsblad till en arbetsstation och sedan analysera hur arbetet med framtagning och uppdatering av standardoperationsbladen skulle utföras. För att uppfylla examensarbetet syfte och besvara de ställda frågeställningarna har författarna samlat information genom samtal med berörd personal, observationer av arbetssekvenser och litteraturstudier.

    Författarna har genom litteraturstudier beskrivit grundläggande teorier relevanta för området och sedan använt den insamlade informationen för att skapa en nulägesbeskrivning. Nulägesbeskrivning har tillsammans med analysen legat till grund för författarnas åtgärdsförslag.

    Efter att observationer av en arbetsstation genomförts, upprättade författarna i samråd med montör ett standardoperationsblad. För att säkerställa att standardoperationsbladen hålls levande tog författarna fram en process som ska förenkla framtagning, uppföljning och uppdatering av standardoperationsbladen.

    Under arbetet har författarna även diskuterat kring hur processen kan appliceras på andra avdelningar på Saab och eventuellt andra företag.

    Slutsatsen för examensarbetet är att författarna har kommit fram till ett resultat som minskar variation av säkerhet, kvalitet och cykeltid genom att arbeta standardiserat. Författarna har även upprättat en process för arbetet kring standardoperationsblad.

  • 66.
    Björk, Oliver
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Sihvo, Sebastian
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    KARTLÄGGNING OCH REDUCERING AV FÖRLUSTER I EN PRODUKTION UTIFRÅN LEAN2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study is to investigate the presence of losses in a production department. Based on this analysis, improvements and suggestions that meet the performance requirements set by the company on the department’s planed cycle time.

    With this purpose in mind, two questions have been raised. These are the questions:

    1. What losses can be identified in the department?

    2. How can these identified losses in the department be reduced?

    A case study has been performed on a producing company, where the production has been observed and staff from the department has been interviewed for increased insight into the situation. The data presented has been analyzed in relation to the theoretical framework set up to achieve the results of the study.

    The result shows how the presence of losses in a production can be connected to production planning and batch size. These connections have in this study support in Lean production and its three M. Losses associated with waste were also found, such as movement, transport and waiting.

    In this study, there was only focus on one case company. The case company is a producing company, the department that the study focuses on produces a compressor product. The study does not take into account the production design or requirements beyond what is relevant for designing the improvement proposals.

  • 67.
    Björkman, Britt
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Fahlgren, Hanna
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Produktutveckling av låscylinderadapter2010Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta examensarbetet har utförts i samarbete med företaget BXB Industrial Fittings och med handledning från Jönköpings Tekniska Högskola.

    Uppdraget ändrades under projektets gång, därför beskrivs genomgörandet i rapporten i två delar då vissa moment gjordes två gånger. Från början bestod uppdraget i att utveckla ett lås för maskinskyddsgaller, men ändrades till att istället utveckla adaptrar för oval- och PZ-cylindrar så att de enkelt kan monteras i det tidigare nämnda låshuset.

    Ovalcylindern är den låscylinder som är vanligast i Skandinavien, medan PZ-cylindern är den cylinder som är vanligast i övriga Europa. Problemet med dessa två låscylindrar är att de har olika dimensioner vilket gör att de inte kan monteras i samma låshus. Eftersom BXB:s lås säljs över hela Europa och kunder efterfrågar lås med samma funktion, men med olika låscylindrar anses en adapter som en bra lösning på detta problem.

    Då författarna inte tidigare hade någon erfarenhet av konstruktion av lås gjordes en grundlig patent- och marknadsundersökning för att skapa en bra grund för fortsatt arbete. Efter undersökningen startade författarna idégenereringsprocessen som resulterade i ett stort antal skisser på olika lösningsförslag. Efter idégenereringen gjordes en sållning för att få fram det slutliga förslaget, detta förslag måttsattes och justerades sedan i CAD.

    Arbetet resulterade i två adaptrar med samma utvändigt mått som utvinner en identisk rörelse och kraft. Adaptrarna underlättar vid konstruktionen av lås eftersom de medgör att både PZ-cylindern och ovalcylindern kan monteras i samma låshus. Adaptrarna har konstruerats på ett användarvänligt sätt genom att hänsyn har tagits till de personer som kommer i kontakt med dem. Antalet komponenter har minimerats och enkla mekanismer har använts, vilket gör adaptrarna enklare att montera under tillverkningen. Detta leder i sin tur till att tillverkningskostnaderna minimeras och att adaptrarna både genom sitt pris och sin användarvänlighet anses vara konkurrenskraftiga på dagens marknad. Adaptrarnas konstruktion och inre mekanik beskrivs i rapporen utifrån CAD-bilder.

  • 68.
    Björkman, Joel
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Matti, Joseph
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Automatiserad Konstruktion av Varmkanalsystem2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The thesis has been carried out in cooperation with Master Flow AB, Västervik owned by the EWEBE Group. The company produces and sells hot runner systems that are tailor made for the customers.

    The problem that MasterFlow AB has encountered is in the construction of complex hot runner systems in SolidWorks. With several different lengths, fronts and endcaps that builds the nozzles of the hot runner systems, is affecting the problems for MasterFlow AB. The purpose of this work is to automate the design of hot runner systems so it does not overload the CAD-system SolidWorks.

    To gain an understanding of the problem, there have been several studies and observations at the company, where the focus has been on how the work is done with the design of hot runner systems. By using help from the corporate management, enough information has been collected to find a solution to these problems.

    The implementation of design automation has been based on a flowchart that was created. It describes how MasterFlow AB approaches when they choose nozzles to its hot runner systems. Programming was done in Visual Studio, in the language Visual Basic. Furthermore, the program Howtomation was used to tie the programming together.

    An application called “Bushing Generator” has been created where automation of the design of nozzle is fully possible. The program Bushing Generator selects the options that is specific for the selected nozzle and creates one or more nozzles which is mounted to the assembly of the manifold.

    Master Flow AB is considered to have high potential for further automation of the hot runner system. Automation that includes the manifold and the creation of drawings is considered possible.

  • 69.
    Björn, Jonathan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Simulation of a Clinch Unit by using Cosmos and Abaqus2007Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The following report contains an evaluation of the use of mathematical simulation programs at the company Isaberg Rapid AB. The work includes booth FE and motion simulations where the results are compared with real life test data.

    The goal of the report is to evaluate the accuracy of simulations which can be performed by engineers as a part of the design process. By using mathematical simulation tools it is possible to find a good design solution early in the development phase and thereby shorten lead time and reduce costs.

  • 70.
    Blomqvist, Anton
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Eliasson, Simon
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Kvalitetsförbättring av räcke2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 71.
    Blåbäck, Ludvig
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Khalil, Gilbert
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utveckling av CBC Strap Cutter: Genom att möjliggöra en viss materialseparation tillsammans med en förenklad tömningsprocess2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose - In this thesis a further development of Cyklop Teknik AB's existing product, CBC Strap Cutter, has been developed. The product is a machine that cuts packaging tape to reduce the amount space the waste takes up, especially during waste transports. Some problem areas had been revealed after the market introduction of the product. One of these problems was that several unnecessary steps had to be performed before the waste bin could be emptied. One of these step was lifting the machine from the waste bin who also acted as a rack of sorts. A material sorting function, for plastics and ferromagnetic metals, was also requested by Cyklop Teknik AB.

    Method – The work has been performed by completing a concept study. First a requirement specification [appendix 1] and a Gantt chart [appendix 3] was developed to provide a benchmark for what should be done and when. The work that followed thereafter was a competitive analysis supplemented by a pre-study. The purpose of these studies was to observe how the competitors and related industries had solved these and related problems. Results from the studies that was performed made it clear that no competitor had a similar product that could sort the materials. Brainstorming was thereafter performed to develop new ideas as a help to solve the aforementioned problems and to generate new concepts. Furthermore, the most appropriate concepts was selected through direct feedback from Cyklop Teknik AB among others and a method called "Concept Scoring Matrix". Finally one concept remained and was further developed in a CAD environment, specifically in SolidWorks.

    Results - The final result was a concept that had been divided into different sub-components. These were cutting machine, separation module, rack and waste bin. The cutting machine was the part cut up the input material. This in turn was kept as close to the original machine as possible and only acquired minor adjustments. In doing so Cyklop Teknik AB's manufacturing processes could remain similar as they have been. A module was developed for the separation, it in turn was constructed with a spinning magnetic tube. The reason for this was that it would give the company possibility of selling the concept with or without the sorting module and its function. At the same time the module could be adapted and sold for other areas where fast sorting of said material would need to be performed. A rack has also been developed to simplify the vacating of the waste bin that was a critical part of the work. In doing so there would be no unnecessary moments that had to be performed. A waste bin was also designed with both wheels and forklift slots to facilitate emptying and offer great opportunities for the user. A single emptying process was developed and made it possible to empty the waste bin when it would be hoisted by a forklift.

    Restrictions - This project has only developed a prototype in CAD that in turn could be developed further. The reason for this was the short time frame that was allocated for the thesis. No simulations or computations were either performed to validate and optimize the concept in each area. Likewise, it was because of the short time frame. No customer study has been conducted, the work has instead been based on the information received from the Cyklop Teknik AB.

  • 72.
    Bogdanoff, Toni
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Dahlström, Jimmy
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    The influence of copper on an Al-Si-Mg alloy (A356) - Microstructure and mechanical properties2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Aluminum alloys are widely used in many manufacturing areas due to good castability, lightness and mechanical properties. The purpose of this research is to investigate copper’s influence on an Al-Si-Mg alloy (A356). Copper in the range of 0.6 – 1.6 wt. % has been used in an A356 aluminum based alloy. In this work a simulation of three different casting processes, sand-, die- and high pressure die-casting has been employed with the help of gradient solidification equipment. The microstructure of the samples has been studied by optical and scanning electron microscopy. Materials in both as-cast and heat treated states have been investigated through tensile test bars  to get the mechanical properties of the different conditions.

     

    Questions that have been subjected to answer are what influence does copper have on the plastic deformation and on fracture behavior and whether there is a relationship between the content of copper and increased porosity or not; and in that case explore this relationship  between the amount of copper and the mechanical behaviour.

     

    It has been analyzed that a peak of mechanical properties is obtained with a content about 1.6 wt. % copper. The increment of copper seems to have a remarkable impact on the mechanical properties and especially after the aging process showing a large raise on the ultimate tensile strength and yield strength.

    Relationship between the copper content and increased porosity could not be found.

  • 73.
    Bognandi, Saralie
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. 1990.
    Sillanpää, Niclas
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Att ta fram koncept till en monostabil växelväljare med roterande inmatning2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syfte – Syftet med detta examensarbete är att med hjälp av undersökningar, metoder och teorier ta fram konceptförslag åt Kongsberg Automotive för en växelväljare med roterande inmatning som ska sitta i automatväxlade bilar.

    Metod – Design brief, konkurrentanalys, funktionsanalys, brainstorming, kravspecifikation, enkätundersökning, användartest, TAM-Technology Acceptance Model.

    Resultat – Resultatet blev en prototyp av ett koncept på en monostabil växelväljare för automatväxlade bilar. Konceptet är cirkulärformad med två stycken rattar i två nivåer som hanterar växlarna drive-reverse respektive park-neutral.

    Implikationer – Studenterna har valt att hålla sig borta från det traditionella växelmönster, som säger att Neutralen ligger mellan växlarna Drive och Reverse, på grund av de nya möjligheterna med Skift By Wire. Genom att manipulera växlingsmönstret lite och separera växlarna Drive - Reverse från Park - Neutral är eleverna övertygade om att det nya växelreglaget är säkrare och mer lättmanövrerad.

    Begränsningar – endast monostabila växelväljare med roterande inmatning har behandlats i denna rapport.

    Nyckelord – Shift-by-wire, GUI, usability, användarupplevelse, interaktionsdesign, fordon, Kongsberg Automotive.

  • 74.
    Borefur, Stefan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utveckling av arbetsmodell för att skapa spårbarhet i SME verksamhet Arbetsmodell för spårbarhet2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    An important part of improving the business is to know what the core of the problem is, so-called root cause. When companies detect errors internally or externally on the product, the root cause must be determined to correct it. For manufacturing companies, this step means that details and/or batches should be delimited to certain manufacturing conditions. Can the company make this delimitation and the manufacturing conditions are determined, the root causes can be identified. In order to make this delimitation, traceability is required.

     

    The company in this report finds that their traceability does not meet customer requirements or provides the information needed to delineate batches. Therefore, the manufacturing conditions can not be determined and nether the root cause. Attempts made to create traceability have not met the requirements. The purpose of this degree project is to develop a work model that enables traceability based on the company's needs and conditions. Theory is gathered from articles, standards and literature to gain insight into existing knowledge in the field. Based on the theory, what is required to achieve traceability is determined. The current situation of the company is mapped based on interviews and observations and documentation.

     

    Based on the overall theory and the mapped current situation, gap analyses are performed to illustrate where the company doesn’t meet the requirements. The analysis results in twelve deficiencies and these deficiencies were analysed to find out what is the underlying problem. In total, six different problems are summarized in a frequency table to demonstrate their impact on the deficiencies. Based on the results of the analysis, a methodology that ensures traceability is compiled. The result was proposals of different nature and scope based on the company's needs. Both theoretical and practical actions was proposed on how the company can achieve traceability.

  • 75. Brannebo, J
    et al.
    Liden, L-M
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    The influence of physical properties and process parameters on metal penetration in small gaps1993Report (Other academic)
  • 76. Brännström, K
    et al.
    Sunnersjö, Staffan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Lateral Vibrations of Propeller Shafts: Computer Calculations and Full Scale Measurements1986In: CADMO 86: proceedings of the International Conference on Computer Aided Design, Manufacture and Operation in the Marine and Offshore Industries, Washington DC, U.S.A., September 1986, Berlin: Springer , 1986Conference paper (Refereed)
  • 77. Burman, Erik
    et al.
    Hansbo, Peter
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Fictitious domain methods using cut elements: III. A stabilized Nitsche method for Stokes’ problem2011Report (Other academic)
    Abstract [en]

    We extend our results on fictitious domain methods for Poisson’s problem to the case of incompressible elasticity, or Stokes’ problem. The mesh is not fitted to the domain boundary. Instead boundary conditions are imposed using a stabilized Nitsche type approach. Control of the non-physical degrees of freedom, i.e., those outside the physical domain, is obtained thanks to a ghost penalty term for both velocities and pressures. Both inf–sup stable and stabilized velocity pressure pairs are considered.

  • 78.
    Burman, Erik
    et al.
    University College London.
    Hansbo, Peter
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Fictitious domain methods using cut elements: III. A stabilized Nitsche method for Stokes’ problem2014In: Mathematical Modelling and Numerical Analysis, ISSN 0764-583X, E-ISSN 1290-3841, Vol. 48, no 3, p. 859-874Article in journal (Refereed)
    Abstract [en]

    We extend the classical Nitsche type weak boundary conditions to a fictitious domain setting. An additional penalty term, acting on the jumps of the gradients over element faces in the interface zone, is added to ensure that the conditioning of the matrix is independent of how the boundary cuts the mesh. Optimal a priori error estimates in the H 1- and L 2-norms are proved as well as an upper bound on the condition number of the system matrix.

  • 79.
    Bäck, Jonathan
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Callerud, Erik
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Kostnadsreduktion med VAVE-metoden: Den bortglömda metoden2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This assignment was performed at Swegon AB in Kvänum, a company that develops, manufactures and sells indoor air conditioning systems. The head management was looking for a more structured method when trying to reduce costs on their products. When constructing a cost reduction evaluation, Swegon uses the VAVE method (Value analysis/Value engineering).

    The assignment was to reduce the variable costs on Swegons Compact assortment, as well as being coordinates in a VAVE-evaluation. Furthermore the assignment also included a review of the VAVE method and submitting suggestions on improvements that could be made to reduce costs at the same time as both employees and management are satisfied. The measures to be made are focused on reducing the costs of constructing a VAVE evaluation. This resulted in two questions:

    1. What changes could be made by using VAVE that would reduce variable costs when manufacturing the Compact products?

    2. Are there any improvements to be implemented in Swegons VAVE?

    To answer question one, full participation was needed both when preparing the workshop and during the workshop. As participation after the workshop are outside the frames of the assignment, that was left out. To answer question two, a thorough investigation of the VAVE method was needed, as well as a comparison to similar methods and experiences from the carried out VAVE. Interviews, observations and document analysis were also done in order to answer the questions in the best way possible.

    As a result, the assignment suggests implementations that would reduce the variable manufacturing costs on the Compact assortment by as much as 12.3%. The measures are focused on reconstruction and change of existing components. Measures giving the highest savings are estimated to run over more than 12 months and therefore resulted in a project that will be carried out in the future when resources are available. The assignment also resulted in an improved version of VAVE where unnecessary steps are removed and elements that can enhance the results are added or changed. The removed steps is make a prototype before the workshop, relationship matrix and pareto chart. The added or changed steps is product specification, customer demands, cost breakdown, evaluation and presentation of the workshop.

    Suggestions on further work in this area would be to evaluate the results of the new version of VAVE, by using it multiple times and then compare it to the version that Swegon currently uses.

  • 80. Bäckman, J
    et al.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Evaluation og filter parameters from direct observations at aluminium castings1999Conference paper (Refereed)
  • 81.
    Börjesson, Tim
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Bolin, Gabriel
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Förbättringsarbete inom materialhantering: På företaget ORWAK AB2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    ORWAK AB is a market leading manufacturer of compaction and baling solutions for solid waste materials like corrugated cardboard, plastics and paper. The company strives for continuous development of their processes and operations with the goal to achieve better efficiency to be able to supply their customers with new innovations and high-quality products. Their vision is “Turning Waste Into Value”

    The purpose of this study has been to identify losses related to the company’s internal supply and management of materials. The study has been limited to a single production line which was chosen together with the company because of its good attributes for generalization. It was also necessary as the consequence of the limited time span. In addition, the purpose of the study has been to develop an action proposal on how to solve the identified losses. To be able to identify the losses the study has processed a numerous of logistics and production theories to constitute an understanding of how an efficient supply of materials can be achieved.

    The empirical research was constructed by the help of observations, interviews, conversations and different time studies. The time studies that was conducted yielded data about how different activities related to each other in frequency and time. The activities were classified into different categories to determine which activities that was adding value, and which were not. This made it possible to determine the total loss of the studied production line. As a total, 17% of the documented activates was categorized as losses.  

    The analysis connects the identified losses with different aspects of applicable theory to identify and solve them. These connections then create the foundation for the action proposal that has been presented. The result of the action proposal was to implement a more specific standard about how production and warehouse related activities should function, reform the current tool and material racks in production and remove unnecessary pallets, equipment and tools which is not of use. A new production line layout which improves the flow and handling of material for the operators as well as reduces the losses identified to supply of material. The action proposal also presents a suggestion to implement a new module to the company’s current ERP-system to solve the lack of information flow between the warehouse and production regarding material levels, locations and material call offs.

  • 82. Caceres, C.H.
    et al.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Taylor, J.A.
    Strength-Ductility Behaviour of Al-Si-Cu-Mg Casting Alloys in T6 Temper2003In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 15, no 5, p. 531-543Article in journal (Refereed)
  • 83. Cacers, C.H
    et al.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Taylor, J.A.
    Microstructural Factors and the Mechanical Performance of Al-Si-Mg and Al-Si-Cu-Mg Casting Alloys2002In: Advances in Aluminum Casting Technology II: Proceedings of the Second International Aluminum Casting Technology Symposium, Columbus, Ohio, October 2002 / [ed] M Tiryakioglu; J Campbell, Columbus, OH; USA: ASM International , 2002, p. 49-57Conference paper (Refereed)
  • 84.
    Callenberg, Mikael
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Bohman, Stefan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utveckling av hjälpmedel för rörelsehindrade: Air Grip-13052013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The work is an extension of a previous year's work, whose goal was to create a 3D-printed model of a vacuum suction. An assistant device for disabled people to pick up objects from the ground or narrow places. Based on that, the authors together with E.MIL Energy & Environment decided to work on and develop the vacuum suction to a more functionally orientated direction. The aim of this work is to make relevant tests, analyze the components and eventually create a functional model of the vacuum suction assigned the working title of AG-1305.

    The implementation and the method consists of tests on two existing fans, one centrifugal fan and one axial fan. Many tests have been conducted with various objects. The tests have been performed with regard to a variety of factors as the ratios of the tubes length, design and materials and as well as the voltage impact on the fan.

    The results showed clear guidelines of what’s important to take into consideration when a function model should be created. With the help of literature reviews on batteries and ergonomics a model could be assembled. A model well adapted in both performance and also the ergonomically requirements set up in regard of the target group that is disabled people.

  • 85.
    Cannmo, Patrik
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    An interface model based on damage coupled to slip and dilatation1998In: Fracture from defects: Proceedings of the 12th Bienniel Conference on Fracture - ECF, held in Sheffield, U.K., 14-18 September 1998, West Midlands, U.K.: Engineering Materials Advisory Services , 1998, p. 957-962Conference paper (Refereed)
    Abstract [en]

    The mesomechanics behavior of a polycrystalline microstructure subjected to creep and constant strain rate loadings is investigated. The analysis is based on a Voronoi polygonization strategy for the generation of grains, that are bonded to each other via interfaces along the grain boundaries. A new constitutive model is proposed for the rate-dependent debonding along these interfaces, whereby damage is kinetically coupled to viscoplastic slip and dilatation. The paper may be viewed as generalizing the rate-independent model used in Cannmo et al. (1995).

  • 86.
    Cannmo, Patrik
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Damage-based interface model: application to the degradation and failure of a polycrystalline microstructure1997Doctoral thesis, monograph (Other scientific)
    Abstract [en]

    A constitutive model is introduced for material interfaces. The model is based on damage coupled to plastic slip and dilatation, and can describe the successive degradation and failure of an interface. The main application of the interface model is in the context of a mesomechanics analysis of a polycrystalline microstructure which may consist of two phases. FE-calculations are carried out for a unit cell of microstructure. A sensitivity analysis is carried out for possible variation of the interfacial parameters. Localization and shear bands are detected in the analytically predicted range.

  • 87.
    Cannmo, Patrik
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Mähler, Lennart
    Runesson, Kenneth
    Modelling of interfacial viscoplastic slip coupled to damage in a polycrystalline microstructure1997In: Computational Mechanics, ISSN 0178-7675, E-ISSN 1432-0924, Vol. 20, no 1-2, p. 12-19Article in journal (Refereed)
    Abstract [en]

    The mesomechanics behavior of a polycrystalline microstructure subjected to creep and constant strain rate loadings is investigated. The analysis is based on a Voronoi polygonization strategy for the generation of grains, that are bonded to each other via interfaces along the grain boundaries. A new constitutive model is proposed for the rate-dependent debonding along these interfaces, whereby damage is kinetically coupled to viscoplastic slip and dilatation. The paper may be viewed as generalizing the rate-independent model used in Cannmo et al. (1995).

  • 88.
    Cannmo, Patrik
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Runesson, Kenneth
    Ristinmaa, Matti
    Modelling of plasticity and damage in a polycrystalline microstructure1995In: International journal of plasticity, ISSN 0749-6419, E-ISSN 1879-2154, Vol. 11, no 8, p. 949-970Article in journal (Refereed)
    Abstract [en]

    The mesomechanical behavior of a polycrystalline microstructure subjected to monotonic and cyclic loadings is investigated. The analysis is based on a Voronoi polygonization strategy for generation of grains embedded in a contiguous matrix. The main emphasis is to investigate the interaction between the microconstituents and the failure processes along grain boundaries. A rational interface theory based on damage development coupled to inelastic slip and dilatation is developed. The theory uses the interface width as a constitutive parameter, which regularizes the theory of LEMAITRE [1992], that is restricted to perfect bond between grain and matrix. In a series of FE-analyses parameter variations were performed. The unit cell size (as compared to the average grain diameter), the grain-matrix area ratio, the interface width and constitutive parameters. It appears that the composite behavior can be designed as brittle or ductile solely depending on the strength and rate of damage development in the interfaces. A localization band was detected, and its orientation is in the range that is predicted within continuum theory

  • 89.
    Cannmo, Patrik
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Seifeddine, Salem
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Svensson, Linnea
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Svensson, Ingvar L
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Stress-Strain Modelling Influenced by Porosities in Cast Aluminium Alloys2006Conference paper (Refereed)
  • 90.
    Cannmo, Patrik
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Snygg, Henrik
    FE-modeling of dynamic experimental testing with large elastic-plastic deformations2001In: Proceedings of IMAC-XIX: a conference on structural dynamics : February 5-8, 2001, Hyatt Orlando, Kissimmee, Florida, Bethel, Conn.: Society for Experimental Mechanics , 2001, p. 531-537Conference paper (Refereed)
    Abstract [en]

    Several types of dynamic tests are carried out at SP Swedish National Testing and Research Institute. The tests considered in this paper, which are all simulated with FE-calculations, are as follows: a drop test of cask filled with water, a tennis racket/ball test, a test of a full face protector for hockey players and an impact test of a simplified bumper. To obtain a high-quality verification of the FE-results high-speed video recording of the test sequence is done in all four cases. Parameter studies are done regarding velocity and drop height. The FE-models are built up in the commercial software ABAQUS and I-deas, and are all solved numerically with ABAQUS/Explicit. The material models used in the FE-calculations include linear elastic, elastic-plastic with non-linear hardening, hyperelastic and linear hydrodynamic behavior. Different types of tests are carried out on material specimens in order to determine the material parameters used in the FE-models.

  • 91.
    Cao, Haiping
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Component Technology.
    On some characteristics of microstructure and defects in die-cast magnesium components2005In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 488-489, p. 283-286Article in journal (Refereed)
    Abstract [en]

    A mapping of fatigue crack growth rates in thick plates of a high strength aluminium alloy has been done. The plate thicknesses investigated was 100, 150 and 200 mm. In this work, material from near edge at near surface and mid-thickness has been investigated.

    Measurements of crack length has been performed using DC potential drop. Cyclic condensation is used in order to reveal crack growth behaviour for stage I and the earlier part of stage II crack growth.

    Influence of crack closure, crack branching and slow growing side cracks on fatigue crack growth rate of S-L and L-T oriented specimens are discussed. Variation of difference in growth rate in the upper part of the stage II growth between near surface and mid thickness positioned L-T specimens are found to vary with plate thickness.

  • 92.
    Cao, Haiping
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Component Technology.
    On the Microstructure and Mechanical Properties of Mg-Al Alloys2004Licentiate thesis, monograph (Other academic)
  • 93.
    Cao, Haiping
    et al.
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Granath, Olof
    Wessén, Magnus
    Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    The effect of Si Content on the Mechanical Properties of Rheocast Al Components Using the RHEOMETAL Process2008In: Solid State Phenomena, ISSN 1012-0394, E-ISSN 1662-9779, Vol. 141-143, p. 779-784Article in journal (Refereed)
  • 94.
    Cao, Haiping
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Wessén, Magnus
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Characteristics of microstructure and banded defects in die-cast AM50 magnesium components2005In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 18, no 6, p. 377-384Article in journal (Refereed)
    Abstract [en]

    It has become more and more common for companies to move part of their production to low cost countries and/or closer to important markets. However, quite often the product development is not moved. The result is an increased distance between product development and production. The interface between the two departments is important to lead time, cost and quality and therefore the cooperation must work smoothly. To achieve this, most literature recommends early and tight cooperation. However this can be complicated by expensive and time consuming travels and/or usage of less rich communication such as emails and phone calls.

    It is difficult to make the transition in general from product development to production and the possible problems increase with the distance. The PD-P interface consists of several components and how a problem in one component is affected by problems in other components is not explicitly discussed in literature. The purpose in this paper is to explore if there are such connections i.e. connections between an observable problem and other components in the PD-P interface in a geographically dispersed setting. The paper does so by merging the distributed work literature and the PD-P interface literature.

    The analysis is based on four PD-P interface components; technological, organizational, scope and task. The analysis indicates that observable problems as e.g. low frequency of communication can be the symptom of one or a combination of problems. Connections between the components in the PD-P interface are exemplified in a geographically dispersed setting. Furthermore the underlying causes to the problems connected to the geographically dispersed setting in the PD-P interface are elucidated. In the case of low frequency of communication, it could be the technical system hindering communication and the different time zones disrupt it even more. Hence one symptom could be caused by different underlying problems. Each problem needs to be broken down to find the cause and the solution could be found in any of the four interface components.

    The results indicate that the actual distance is not the biggest problem but uncertainties (e.g. new collaborations) and differences (culture and work methods) which increase lead time. We have also seen that single underling problems can cause problem in several of the PD-P interface components. This indicates that if these underlying problems can be solved the project results can be vastly improved. For example, trust issues occur in the scope component (affects the willingness to share information) and in the organizational interface component (both competence trust and goodwill trust affects involvement and commitment to the project). Consequently, if problems like this can be solved many other problems will become minor problems and project objectives will be more likely to be obtained. However trust is difficult to achieve with a geographical distance between product development and production. The analysis also indicates that due to the distance more attention is paid to the PD-P interface, e.g. more experienced team members are appointed. This can be contributing to a smoother PD-P interface than expected.

  • 95.
    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.
    Effect of Microstructure on Mechanical Properties of As-Cast Mg-Al Alloys2004In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 35, no 1, p. 309-319Article in journal (Refereed)
  • 96.
    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.
    Influence of Microstructure on Mechanical Properties in Mg-Al Casting alloys2002Conference paper (Other academic)
  • 97.
    Cao, Haiping
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Wessén, Magnus
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
    Mechanisms of segregation band defect formation in pressure die-cast magnesium components2005In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 488-489, p. 381-384Article in journal (Refereed)
    Abstract [en]

    Initially, when implementing a design automation system the focus is on successfully developing a system that generates design variants based on different customer specifications, i.e. the execution of system embedded knowledge and system output. However, in the long run two important aspects are the modelling and management of the knowledge that govern the designs. The increasing emphasis to deploy a holistic view on the products properties and functions implies an increasing number of life-cycle requirements. These requirements should all be used to enhance the knowledge-base allowing for correct decisions to be made. In a system for automated variant design these life-cycle requirements have to be expressed as algorithms and/or computational statements to be intertwined with the design calculations. The number of requirements can be significantly large and they are scattered over different systems. The aim of the presented work is to provide an approach for modelling of manufacturing requirements, supporting both knowledge execution and information management, in systems for automated variant design.

  • 98.
    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.
    Modelling of Microstructure: Mechanical Property Relations in Cast Mg-Al alloys2003In: Modeling of casting, welding and advanced solidification processes - X: proceedings from the Tenth International Conference on Modeling of Casting, Welding and Advanced Solidification Processes held in Destin, Florida on May 25-30, 2003 / [ed] Doru Michael Stefanescu, Warrendale, Penn.: TMS , 2003, p. 165-172Conference paper (Other academic)
  • 99.
    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.
    On the mechanisms of segregation band formation and its influence on the mechanical properties of pressure die cast magnesium alloys2003In: 11. Magnesium-Abnehmerseminar: 25./26. September 2003 in Aalen = 11th Magnesium Automotive and End User Seminar, Aalen: Europ. Forschungsgemeinschaft Magnesiumguss , 2003Conference paper (Other academic)
  • 100.
    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.
    Processing effects on the morphology of semi-solid Mg alloy slurry produced by the RSFTM process2006In: Proceedings of 3rd International Conference High Tech Die Casting, AIM, Vicenza, Italy, 2006Conference paper (Other academic)
1234567 51 - 100 of 675
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