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Automated Manufacturability Analysis of the Draw Bending of Complex Aluminum Profiles
Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.ORCID iD: 0000-0003-1162-724X
2009 (English)In: ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE 2009), 2009Conference paper, Published paper (Refereed)
Abstract [en]

Manufacturing companies are required to develop and produce products that meet increased requirements from customers and investors on shortened time spans. 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 lead-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 the corporation systems, thus allowing full control over the design of production equipments.

The contribution of this work is a method for connecting knowledge pieces implemented in auxiliary software applications using an inference engine. The knowledge pieces can control CAD-models and automatically generate, execute, and interpret finite element analyses. The presented method allows the automation of corporation know-how developed by skilled engineers over time. Further, it is possible for the resulting systems to meet criteria for good design automation systems such as low effort of developing, low level of investment, user readable and understandable knowledge, scalability, and flexibility.

The method is exemplified by an implementation for analyzing manufacturability of the rotary draw bending of extruded sections of aluminum where the sections are complex. The output from the example system is based on established design practice and heuristic knowledge developed over many years of practical experience, rules analytically derived from fundamental physical laws, and finite element calculations. The system applies knowledge to a given specification that a skilled engineer otherwise would do manually. The method is described along with the example system in this paper.

Place, publisher, year, edition, pages
2009.
Identifiers
URN: urn:nbn:se:hj:diva-10674OAI: oai:DiVA.org:hj-10674DiVA, id: diva2:272964
Available from: 2009-10-19 Created: 2009-10-19 Last updated: 2016-08-12Bibliographically approved
In thesis
1. 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. p. 82
Series
Doktorsavhandlingar vid Chalmers tekniska högskola, ISSN 0346-718X ; 3191
Keywords
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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