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Automated design of rotary draw bending tools: an approach based on generic CAD-models driven by heuristic and algorithmic knowledge
Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
2006 (English)In: International conference on efficient development of manufacturing machines and processes, 2006, Wroclaw, Poland, 2006Conference paper, (Refereed)
Abstract [en]

For parts suppliers in the manufacturing industry the process of preliminary production preparation and subsequent calculation of offers are critical business activities. A vital part of production preparation is the design of fixtures and tooling necessary for many processes of metal forming. For a company to give quick responses to customer enquiries, or changes in prior specifications, it would be highly beneficial with a degree of automation in this design process. This implies the development of a computer based system able to capture existing design procedures and associated knowledge for the classes of tooling required for the forming process.

In this work we exemplify an automated design system for tooling by an implementation for rotary draw bending of aluminium tubing. The system is based on established design practice and heuristic knowledge developed over many years of practical experience. The system will evaluate whether a given specification is producible with existing materials and equipment, select suitable machine, determine process parameters and determine type and dimensions of components of form die, clamp die, follower or pressure die, wiper and mandrel. The system is built on readily available commercial software packages. When building a system of this kind it is essential that the knowledge documentation and structure is such that the functions of the system can be easily understood by the users of the system and by future developers. Aspects of user friendliness, transparency and scalability are addressed in the summary of this paper.

Place, publisher, year, edition, pages
2006.
Keyword [en]
Design Automation, Rotary Draw Bending, Knowledge acquisition, CATIA V5
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:hj:diva-4804OAI: oai:DiVA.org:hj-4804DiVA: diva2:35624
Available from: 2007-12-13 Created: 2007-12-13 Last updated: 2011-05-16Bibliographically approved
In thesis
1. Design Automation Systems for Production Preparation: Applied on the Rotary Draw Bending Process
Open this publication in new window or tab >>Design Automation Systems for Production Preparation: Applied on the Rotary Draw Bending Process
2008 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Intensive competition on the global market puts great pressure on manufacturing companies to develop and produce products that meet requirements from customers and investors. One key factor in meeting these requirements is the efficiency of the product development and the production preparation process. Design automation is a powerful tool to increase efficiency in these two processes.

The benefits of automating the production preparation process are shortened led-time, improved product performance, and ultimately decreased cost. Further, automation is beneficial as it increases the ability to adapt products to new product specifications with production preparations done in few or in a single step. During the automation process, knowledge about the production preparation process is collected and stored in central systems, thus allowing full control over the design of production equipments.

Three main topics are addressed in this thesis: the flexibility of design automation systems, knowledge bases containing conflicting rules, and the automation of the finite element analysis process. These three topics are discussed in connection with the production preparation process of rotary draw bending.

One conclusion drawn from the research is that it is possible to apply the concept of design automation to the production preparation process at different levels of automation depending on characteristics of the implemented knowledge. In order to make design automation systems as flexible as possible, the concept of object orientation should be adapted when building the knowledge base and when building the products geometrical representations. It is possible to automate the process of setting up, running, and interpreting finite element analyses to a great extent and making the automated finite element analysis process a part of the global design automation system.

Place, publisher, year, edition, pages
Göteborg: Chalmers, 2008. 74 p.
Series
Research Series from Chalmers University of Technology Department of Product and Production Development, ISSN 1652-9243 ; 33
Keyword
Design automation, Rotary draw bending, Knowledge Based Engineering (KBE), and Finite Element Analysis (FEA)
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
urn:nbn:se:hj:diva-10673 (URN)
Presentation
(English)
Opponent
Supervisors
Available from: 2009-12-22 Created: 2009-10-19 Last updated: 2016-08-12Bibliographically approved
2. Automated Computer Systems for Manufacturability Analyses and Tooling Design: Applied to the Rotary Draw Bending Process
Open this publication in new window or tab >>Automated Computer Systems for Manufacturability Analyses and Tooling Design: Applied to the Rotary Draw Bending Process
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Automatiserade Datorsystem för Tillverkningsbarhets-analyser och Verktygskonstruktion : Tillämpat på Dragbockningsprocessen
Abstract [en]

Intensive competition on the global market puts great pressure on manufacturing companies to develop and produce products that meet requirements from customers and investors. One key factor in meeting these requirements is the efficiency of the product development and the production preparation processes. Design automation is a powerful tool to increase efficiency in these two processes.

The benefits of automating the manufacturability analysis process, a part of the production preparation process, are shortened lead-time, improved product performance, quality assurance, and, ultimately, decreased costs. Further, automation is beneficial as it increases the ability to adapt products to new product specifications with production preparations done in a few or in a single step. During the automation process, knowledge about the manufacturability analysis process is collected and stored in central systems, thus allowing full control over the design of production equipments.

Topics addressed in this thesis include the flexibility of design automation systems, knowledge-bases containing alternative design rules, the automation of the finite element analysis process, manufacturability analysis over several productions steps, and the determination of production limits by looping the automated manufacturability analysis process. These topics are discussed in connection with the rotary draw bending of aluminum profiles.

It is concluded that the concept of design automation can be applied to the manufacturability analysis process at different levels of automation depending on the characteristics of the implemented knowledge. The concept of object orientation should be adapted when implementing a knowledge-base and when developing the geometrical representations of the products. This makes a design automation system flexible enough to edit underlying knowledge and to extend the targeted design space. It is possible to automate the process of setting up, running, and interpreting finite element analyses to a great extent, enabling the design automation system to evaluate its own design proposals. It is also possible to enable such systems to consider sequences of manufacturing steps and loop them to develop decision support guiding engineers early in the design process, saving time and money while still assuring high product quality.

Place, publisher, year, edition, pages
Göteborg: Chalmers Reproservice, 2011. 82 p.
Series
Doktorsavhandlingar vid Chalmers tekniska högskola, ISSN 0346-718X ; 3191
Keyword
Design For Manufacturability, Design Automation, Rotary Draw Bending, and Knowledge-based Engineering (KBE)
National Category
Other Engineering and Technologies not elsewhere specified Other Mechanical Engineering
Identifiers
urn:nbn:se:hj:diva-15011 (URN)978-91-7385-510-5 (ISBN)
Public defence
2011-04-29, E1405, Gjuterigatan 5, Jönköping, 10:00 (Swedish)
Opponent
Supervisors
Available from: 2011-05-16 Created: 2011-05-12 Last updated: 2012-01-09Bibliographically approved

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