This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Finite Element and Experimental Study of Sheet Deformation as Influenced by Drawbead End Geometry
Technical Paper
2003-01-0687
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Drawbeads have been playing an important role in deep drawing processes. The restraining force exerted by the drawbeads is important in enhancing the part formability. It is found that improper drawbead design will result in defects such as wrinkles and splitting. Thus, the drawbead geometry, especially its end radius, is a critical aspect in the die design. The present investigation focuses on the influence of the drawbead end radius and blankholder force on the sheet deformation patterns. The experimental results reveal that a drawbead with end radius equal to its cross sectional radius will cause severe deformation and wrinkling downstream of its end. With drawbead end radius twice the size of its cross sectional radius, the deformation in the downstream side of the drawbead end becomes smoother, hence improving the severe deformation and wrinkling. A higher blankholding force also suppresses the wrinkling near the drawbead end. A corresponding finite element model successfully corroborates such trends.
Authors
Citation
Chen, C. and Weinmann, K., "A Finite Element and Experimental Study of Sheet Deformation as Influenced by Drawbead End Geometry," SAE Technical Paper 2003-01-0687, 2003, https://doi.org/10.4271/2003-01-0687.Also In
References
- Avitzur, B. 1983 Handbook of Metal Forming Processes Wiley Interscience Publication New York
- Hosford, W. Caddell, R. 1983 Metal Forming: Mechanics and Metallurgy Prentice Hall Englewoods Cliffs, N. J. 07632, United States
- ASM International Metal Handbook 1988 9th 14 S. L. Semiatin Metal Park, Ohio
- Beck, S. 2000 Control of the Deep Drawing Process through Active Drawbeads New Development in Sheet Metal Forming 195 212
- Bohn, M. L. Jurthe, S. U. Weinmann, K. J. 1998 A New Multi-point Active Drawbead Forming Die: Model Development for Process Optimization” SAE Paper No. 980076 Detroit, Michigan 23 30
- Li, R. Weinmann, K. J. 1999 The Effect of Active Drawbeads on Depth of Draw in the Forming of Aluminum Panel Proceedings of the 6 th International Conference on Technology of Plasticity 2031 2038
- Michler, J. R. Weinmann, K. J. Kashani, A. R. Majlessi, S. A. 1994 A Strip Drawing Simulator with Computer Controlled Drawbead Penetration and Blankholder Pressure J. Mater. Process. Technol. 43 177 194
- Michler, J. R. Weinmann, K. J. Kashani, A. R. 1995 Feedback Control of Sheet Metal Forming Process Using Drawbead Penetration as the Control Variable Trans. NAMRI/SME XXIII 71 76
- Demeri, M. Y. 1993 Drawbeads in Sheet Metal Forming J. of Mater. Eng. and Performance 2 6 863 866
- Bohn, M. L. Michler, J. R. Weinmann, K. J. 1996 A New Concept for A Hydro-mechanical Press Conversion for Sheet Metal Research Paper MF96-126, Proc. of NAMRC XXIV Ann Arbor, Michigan 95 99
- Manthey, D. Nastasia, L. 1998 A.S.A.M.E Reference Manual Version 4.0 Camsys Inc.
- LS-DYNA 1998 Theoretical Manual Livermore Software Technology Corporation
- LS-DYNA 1998 Keyword User's Manual: Non-linear Dynamic Analysis of Structures, Version 940 Livermore Software Technology Corporation
- Weinmann, K. J. Rosenberger A. H. Sanchez L. R. ‘The Bauschinger Effect of Sheet Metal under Cyclic Reverse Pure Bending,’ Annals of the CIRP 37 1 1988 289 293
- Xu, S. G. Weinmann, K. J. 1996 A Three Dimensional FE Study of Sheet Metal Flow Over the Drawbead SAE Technical Paper, 960591
- Xu, S. G. Weinmann, K. J. 1996 An Investigation of Drawbead Control in Rectangular Box Forming by Finite Element Modeling Trans. NAMRI/SME May 21-23 Ann Arbor, Michigan 24 137 142
- Kutt, L. M. Pifko, A. B. Nardiello, J. A. Papazian, J. M. 1998 Slow Dynamic Finite Element Simulation of Manufacturing Process Computers and Structures 66 1 1 17