面畸变控制措施的实验研究

Experiment study on controlling technique of surface deflection

面畸变是汽车外覆盖件成形中的重要缺陷 ,通过工艺措施来减小和控制面畸变 ,是解决面畸变问题最有效的途径。由于汽车覆盖件本身的复杂性 ,不便于直接用来研究面畸变问题 ,本文以矩形柱面扁壳为模型 ,提出了其拉深件面畸变的测量方法和评价指标 ,得到了压边力、拉深筋、局部加压、改变压料面形状等工艺措施对面畸变的影响规律 ,从而为面畸变的抑制提供了基本依据。

The surface deflection is an important disadvantaged in the automobile outer panels forming. It can be controlled effectively through forming process. It is difficult to study the surface deflection because of the complexity of automobile panels. A model of cylinder shallow shell is founded, and the measured method and evaluated indicator of surface deflection for drawing parts are presented. The influence law of process techniques on surface deflection such as binder force, draw-beads, local force, and shape of blank-hold surface is achieved, which give a basic reference for controlling surface deflection.