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《Die & Mould Industry》 2007-08
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Effect of blankholder pressure on the spring-back in U-shaped bending of sheet material

YANG An-min(Henan Xinfei Electric Appliances Co.,Ltd,Xinxiang,Henan 453002,China)  
The modeling of U-shaped bending and the quantification presentation of U-shaped bending resilience were stated.The effects of blankholder pressure on the bending resilience were researched by using numerical simulation.The facilities and samples used in the experimental study on the resilience were described.The test results indicates that when the blankholder pressure varies within limits,the spring back angle will decrease with the increase of blankholder pressure;the curvature radius of U-shaped component side wall will increase with the augmentation of blankholder pressure,i.e.the curling of side wall will lessen.It is concluded that the appropriate selection of blankholder pressure value can diminish the resilience,and the optimization of blankholder pressure can obtain high quality of bent parts.
【CateGory Index】: TG386.31
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