薄板拉深过程中压边力与破裂关系的研究  

Analysis of blank holder force and fracture during the process of deep drawing for thin sheet

作　　者：李二玲[1] 邓沛然[1] 杨尚磊[1] 曹阳根[1] 王殊寻 

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《锻压技术》2014年第6期55-59,共5页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51075256);校基金资助项目(A-2600-12-01066)

摘　　要：研究了304不锈钢薄板在拉深成形过程中产生破裂的原因及改善措施。将智能化控制系统应用在拉深实验中,相对于传统的拉深工艺研究,使其拉深工艺参数得到精确控制。实验结果表明,在冲压速度、润滑条件等相同的条件下,对于厚度为0.28 mm的钢板,直径为Φ45.1 mm的坯料最佳压边力为80 kN,直径为Φ44.5 mm的坯料最佳压边力为60 kN,这一结果与模拟趋势也基本吻合。在一定范围内,通过增大压边力,可以改善筒形件在成形过程中的起皱缺陷,解决在拉深成形过程中304不锈钢薄板出现竖向破裂的问题;压边力被精确记载,有助于快速准确地制定薄板材料拉深工艺。The fracture reason and improvement measure of thin 304 stainless sheet during the deep drawing process were studied. Intelli- gent control system was applied in the deep drawing experiment; compared with traditional research, the process parameters were con- trolled precisely. Experiment results show that, for 0. 28 mm thickness steel plate, under the same conditions of stamping and lubrication conditions etc. , the optimum blank - holder force is 80 and 60 kN while plate diameter is 45.1 mm and 44. 5 mm respectively. The result coincides with the tendency of simulation. Within a certain range, the wrinkling in the cylindrical parts can be improved by increasing the blank-holder force in the process of forming and the problem of vertical fracture occuring in the process of drawing for thin 304 stainless sheet is solved. The blank-holder force can be recorded precisely, which is benefit for seeing out the process of deep drawing for thin sheet materials rapidly and accurately.

关 键 词：智能化控制 薄板拉深 起皱 竖向破裂 

分 类 号：TG386.41[金属学及工艺—金属压力加工]