采用弹性垫抑制多点数字化拉形工艺中的压痕

Suppression of dimples in digital multi-point stretching process

利用ANSYS/LS-DYNA软件对马鞍形件的传统拉形及多点拉形过程进行了数值模拟,并对多点拉形中压痕的产生原因及抑制方法进行了研究。研究结果表明:多点拉形工艺中的压痕主要分为包络式和凹凸式两种;采用弹性垫技术能够有效抑制压痕的产生;弹性垫越厚对压痕的抑制作用越好,但是成形件与目标形状的误差也相应加大;选择适当厚度的弹性垫,可以得到表面光滑、成形误差较小的工件。

The fundamentals of the digital multi-point stretching process were introduced. The numerical simulations for the traditional stretching and the digital multi-point stretching process of the saddle part were performed by ANSYS/LS-DYNA software.The generation and suppression of dimples in the multi-point stretching process were studied.The results showed that the enveloping dimple and the concave-convex dimple are the main styles produced in the multi-point stretching process.The dimples can be suppressed ef...