一、前言 剖分式轴瓦一般都是平板毛坯经冲压成形为半圆形状。在生产当中,经常发现,冲压成形后的工件(图1),经过涂色法检查,展开以后,其外圆表面的印迹如图2所示,变形不均匀,似马鞍形,端面至30°附近的变形剧烈,工件普遍增宽变厚。而且,工件的外圆粘合度也不理想,中间和两端贴合不好。 工件冲压成形时,产生这些缺陷,其影响的因素较多,现主要从冲压机理出发,粗略探讨冲模工作参数的影响。 二、冲压机理 First, the preface Split bushings are generally flat blank by stamping into a semicircle shape. In the production, it is often found that the stamping of the workpiece (Figure 1), after color inspection method, after unfolding, the outer surface of the footprint shown in Figure 2, the uneven deformation, saddle-shaped, end to 30 ° In the vicinity of the dramatic deformation, the general widening and thickening of the workpiece. Moreover, the outer cylindrical workpiece adhesion is not ideal, the middle and ends are not good fit. Workpiece stamping, resulting in these shortcomings, the impact of many factors, mainly from the stamping mechanism, a rough discussion of the impact of die operating parameters. Second, the stamping mechanism