基于DYNAFORM的汽车减震器端盖多步冲压成形分析
Simulation on Multi-steps Stamping for Shock Absorber Lid Based on DYNAFORM
黄 瑶， 朱 青， 王雷刚
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作者单位：（江苏大学 材料科学与工程学院，江苏 镇江 212013）
中文关键字：汽车减震器端盖；多步冲压；数值模拟；中心工艺孔
英文关键字：shock absorber lid; multi-steps stamping; numerical simulation; process hole
中文摘要：汽车减震器端盖是一个非规则深矩形盒零件,冲压成形时容易产生筒壁开裂缺陷。通过对其成形特点的分析,提出了开中心工艺孔的两步拉延冲压成形方案,采用DYNAFORM软件对有无中心工艺孔的方案进行了比较。模拟结果显示,开中心工艺孔可以使板料塑性流动更均匀,减薄率减小,避免了拉裂,提高成形质量,与生产实际吻合。
英文摘要：Fracturing in deep drawing for Shock absorber lid is a common problem because of its irregular rectangular shape. The forming characteristics of shock absorber lid were analyzed and the numerical simulation method was adopted to estimate the defects at two-steps stamping based on the model with middle process hole. By the finite element code DYNAFORM, the forming process based on the model with central process hole was simulated. And another analysis based on the model without middle process hole was also performed. Comparison between the simulation results show that by punching the central process hole, the plastic flow uniformity can be increased and the ratio of thinning is reduced. In addition, the crack can be more effectively controlled and the forming quality can be improved. The simalation result is coincided with the fact.