A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS

金属学报(英文版), 2001, 14(5): 380-386.

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

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

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

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

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

6.Shanghai Volkswagen Automotive Company Ltd.(SVM),Shanghai,201805,China

7.Shanghai Volkswagen Automotive Company Ltd.(SVM),Shanghai,201805,China

A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS

Keywords： drawbead

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.``

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A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEETMETAL DEEP DRAWING PROCESS

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