切边工艺对冲压件回弹影响的研究

作为冲压产品生产的重要工序之一,切边对零件形状精度产生明显影响。针对目前关于切边回弹研究比较少的情况,以某矿用防爆灯灯罩为研究对象,在Dynaform平台下,对切边回弹的产生、构成、切边线位置变化及切边工序安排对冲压件形状精度的影响进行了仿真分析,研究结果认为:切边回弹一方面是由于切边导致零件形状结构变化、内应力重新分布而引起的,另一方面是因为切边线附近应力、应变状态变化而产生的。其中前者占主导地位,在冲压加工中必须予以充分考虑,后者占总体回弹比例较小,对大型、复杂冲压件拉深成形后的切边可忽略其影响;另外,切边线位置变化、切边工序的顺序安排,对零件回弹变形影响明显,实际生产中,可通过适当选择切边线位置、合理安排切边工序在整个工艺路线中的顺序来有效控制切边回弹。

Study on influence of trimming process on springback of Stamping part

As one of the mostimportant process of stamping production,trimming process has an obvious effect on shape and dimension accuracy of final part. Whereas the correlative reports of trimming springback study are rather rare,the present work,aiming at lamp-chimney part of a defend-explosive mine lamp,studied generating mechanism and constitute of trimming springback,the influence of trimming line position change and trimming process planning on the shape accuracy of stamping part by means of Dynaform software....