一种弧形高强钢车身零件冲压回弹控制方法

高强度钢板材料冲压性能对冲压成形后零件精度的影响较大,主要表现在成形性能不稳定和回弹控制复杂.弧形零件具有典型的回弹特征,且回弹量较大,难以获取回弹的具体运动规律,给回弹控制和补偿带来了困难.本文在分析弧形高强钢零件回弹特征规律的基础上,开发典型截面回弹运动规律分析程序,定量分析回弹截面整体和局部的平动与转动量,采用反...

A new method of control of springback of high strength steel parts with arched surface

High strength steels are widely used in automotive industry, they are often found to be more likely to cracked and springback than ordinary plain-carbon steels when they are used. It is difficult to control springback of parts with arched surface in respect that more springback warp. The paper studied on springback of a typical part with arched surface, a system which can control springback is presented based on the characteristic cross-section of the movement of springback method. Firstly, the result of springback could be calculated by FE system or obtained by scan way. Secondly, the parameters of springback movement in the characteristic cross-sections could be analyzed by springback movement of characteristic cross-section method (SMCS). And thirdly, springback control section could be obtained based on the parameters of springback movement by compensation factor method. And last, based on the origin CAD surface and the control section of springback, the mould was compensated for springback by application of shape global deformation method. The practice proved that the system can save more time to deal with springback of part with arched surface, the result of springback compensation is right and applied and the method is worth to spread.