A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS

Acta Metallurgica Sinica (English Letters) ›› 2001, Vol. 14 ›› Issue (5): 380-386 .

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A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS

Y.J. Luo, S.P. Li, J.F. Zheng

National Mold & Die CAD Engineering Research Center, Shanghai 200030, China

Received:2001-05-14 Revised:2001-08-13 Online:2001-10-25 Published:2009-10-10
Contact: Y.J. Luo

Abstract

Abstract: In sheet metal forming, drawbeads are often used to control uneven material flow which may cause defects such as wrinkles, fracture, surface distortion and springback.Appropriate setting and adjusting the drawbead force is one of the most important parameters in sheet metal forming process control. This paper derives the model of loop drawbead restraining force (DBRF) using plastic forming theory, and gives the minimum blankholding force. Experiments are carried out to verify the proposed DBRF model. The good agreement between the calculated values and experiments data justifies the proposed loop drawbead restraining force model.

Key words: drawbead, restraining force, sheet metal, deep drawing

Y.J. Luo, S.P. Li, J.F. Zheng. A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS[J]. Acta Metallurgica Sinica (English Letters), 2001, 14(5): 380-386 .

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[7]	D. N. He, X. F. Yin, H. Z. Thao, D. L*, X. Y. Ruan, J. L. Cheng and J. Y. Jiang 1) Shanghai Jiao Tong University, National Die & Mold CAD E. R. C, Shanghai 200030, China 2) Shanghai Vopkswagen Automotive Company Ltd., Shanghai 201805, China Manuscript received. RESEARCH ON THE EVALUATION METHOD OF FRICTION AND LUBRICATION IN DEEP DRAWING [J]. Acta Metallurgica Sinica (English Letters), 2000, 13(2): 439-445.
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[11]	J.Wang School of Mechanical, Manufacturing and Medical Engineering, Queensland University of Technology, GPO Box 2434, Brisbane, Qld. 4001, Australia. AN EXPERIMENTAL STUDY OF CO 2 LASER CUTTING OF METALLIC COATED SHEET STEELS [J]. Acta Metallurgica Sinica (English Letters), 1999, 12(5): 880-885.

A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS

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