锻压技术

薄板拉深过程中压边力与破裂关系的研究

英文标题：Analysis of blank holder force and fracture during the process of deep drawing for thin sheet

作者：李二玲邓沛然杨尚磊曹阳根王殊寻

单位：上海工程技术大学

分类号：TG386.41

出版年,卷(期):页码：2014,39(6):55-59

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. Intelligent control system was applied in the deep drawing experiment; compared with traditional research, the process parameters were controlled 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.

基金项目：

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

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