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Implementing Computer Simulation into the Concept to Product Process
Technical Paper
1999-01-1003
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Process simulation for product and process design is currently being practiced in industry. However, a number of input variables have a significant effect on the accuracy and reliability of computer predictions. A study was conducted to evaluate the capability of finite element method (FEM) simulations for predicting part characteristics and process conditions in forming complex-shaped, industrial parts.
In industrial applications, there are two objectives for conducting FEM simulations of the stamping process: (1) to optimize the product design by analyzing formability at the product design stage and (2) to reduce the tryout time and cost in process design by predicting the deformation process in advance during the die design stage. For each of these objectives, two kinds of FEM simulations are applied. Pam-Stamp, an incremental dynamic-explicit FEM code released by Engineering Systems Int‘l, matches the second objective well because it can deal with most of the practical stamping parameters. FAST_FORM3D, a one-step FEM code released by Forming Technologies Inc., matches the first objective because it only requires the part geometry and not the complex process information.
In a previous study, these two FEM codes were applied to complex-shaped parts used in manufacturing automobiles and construction machinery. Their capabilities in predicting formability issues in stamping were evaluated. This paper reviews the results of this study and summarizes the recommended procedures for obtaining accurate and reliable results from FEM simulations.
In another study, the effect of controlling the blank holder force (BHF) during the deep drawing of hemispherical, dome-bottomed cups was investigated. The standard automotive aluminum-killed, drawing-quality (AKDQ) steel was used as well as high performance materials such as high strength steel, bake hard steel, and aluminum 6111. It was determined that varying the BHF as a function of stroke improved the strain distributions in the domed cups.
Topic
Citation
Thomas, W. and Altan, T., "Implementing Computer Simulation into the Concept to Product Process," SAE Technical Paper 1999-01-1003, 1999, https://doi.org/10.4271/1999-01-1003.Also In
References
- Ahmetoglu, A. Kinzel, G. Altan, T. 1994 Computer simulation for tool and process design in sheet forming. Journal of Materials Processing Technology 46 421 441
- Ahmetoglu, M. Altan, T. Kinzel, G. 1992 Improvement of part quality in stamping by controlling blank-holder force and pressure Journal of Materials Processing Technology, 33 195 214
- Kergen, R. 1992 Computerised control of BHF in deep drawing, Sheet Metal Industries August 1992 12 15
- Konieczny, A. Kolodziejski, J. Karima, M. 1996 On Feasibility Assessment Tools for Car Body Styling and Body/Product Design IBEC Body Assembly and Manufacturing
- Lange, K. 1985 Handbook of Metal Forming (Lehrbuch der Umformtechnik) Berlin Springer- Verlag
- Shiraya, S. 1993 A Study of the Estimation Method for Sheet Blank Shape. TOYOTA Tech. Report Vol 43
- Siegert, K. 1995 Closed- Loop Control System for Blank Holder Forces In Deep Drawing. Annals of CIRP 44/1/1995 251 254.
- Thomas, W. Altan, T. 1998 Application of Computer Modeling in Part, Die, and Process Design for Manufacturing of Automotive Stampings. Steel Research. 69 4+5