|
摘要：
|
|
起皱是盒形件拉深成形中的主要缺陷,而压边力是控制法兰起皱的主要手段。本文采用基于C-B准则的理论解析与数值模拟方法,研究了材料性能和工艺参数对盒形件拉深法兰起皱临界压边力的影响规律。结果表明:材料性能参数中强度系数K、硬化指数n对法兰起皱临界压边力影响较大,而塑性应变比γ对临界压边力几乎没有影响;临界压边力随拉深行程增加而增大,凹模圆角增大时,临界压边力减小,凸、凹模间隙对临界压边力影响较小。
|
|
Wrinkling is the major defect in the rectangular box deep drawing,and blank holder force is the main method to control wrinkling.Using C-B criterion-based theoretical analysis and numerical simulation,the influences of material properties and technical parameters on the critical blank holder force of flange wrinkling were investigated.The analytic and simulation results show that material parameters,K and n,have significant influences on the critical blank holder force of flange wrinkling in the rectangular box deep drawing,but γ-value has a little influence on it.The critical blank holder force increases with the punch stroke and decreases with the round corner radius,but it is not related to the clearance between punch and die.
|
|
基金项目：
|
|
塑性成形模拟及模具技术国家重点实验室开放基金资助项目(批准号:06-13)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]Cao J,Boyce M.Wrinkling behavior of rectangular platesunder lateral contraint[J].International Journal of Solidsand Sructures,1997,34(2):153-176.
[2]赵军,马瑞,杨嵩,等.盒形件法兰皱曲失稳的临界条件[J].锻压技术,2006,31(5):124-126.
[3]李东琳.盒形件智能化拉深的法兰皱曲预测[D].秦皇岛:燕山大学,2005.
[4]雷君相.圆锥形零件冲压成形皱曲与破裂三极限的预报与控制[J].钢铁研究学报,1999,11(3):20-21.
[5]潘文武.圆锥形件拉深成形智能化控制中合理压边力规律[D].秦皇岛:燕山大学,2002.
[6]谢晖.薄板冲压成形中板料起皱的临界应力分析和预测[J].计算力学学报,2003,20(1):95-100.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
