A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS
来源期刊：Acta Metallurgica Sinica2001年第5期
论文作者：Y.J.Luo J.F.Zheng J.L.Cheng S.P.Li J.Y.Jiang Y.Q.Zhang D.N.He
Key words：drawbead; restraining force; sheet metal; deep drawing;
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.``
Y.J.Luo1，J.F.Zheng1，J.L.Cheng2，S.P.Li1，J.Y.Jiang2，Y.Q.Zhang1，D.N.He1
(1.National Mold & Die CAD Engineering Research Center, Shanghai 200030, China;
2.Shanghai Volkswagen Automotive Company Ltd.(SVM)
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;
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