锻压技术

冲压速度对DP780双相钢和304不锈钢胀形性能影响的试验对比分析

英文标题：Experimental comparative analysis for influence of punch speed on bulging performance of DP780 dual phase steel and 304 stainless steel

作者：程令霞曹阳根邓沛然苏钰

单位：上海工程技术大学

关键词：冲压速度杯突试验胀形性能

分类号：TG386.1

出版年,卷(期):页码：2015,40(2):145-147

摘要：

利用速度可控的小松伺服压力机对双相钢DP780与304不锈钢1 mm板料进行杯突试验，根据杯突试验值Er的大小来研究冲压速度对试验结果的影响。对比双相钢DP780及304不锈钢两种材料的试验结果发现，在冲压速度由3 mm·s-1增大到30 mm·s-1的过程中，304不锈钢杯突值从9.39 mm降低到8.59 mm，双相钢DP780杯突值从7.53 mm降低到7.39 mm。此实验结果使速度对材料拉胀成形性能的影响得到确认，即在3～30 mm·s-1 区间内，随着冲压速度的升高，材料杯突值不断减小，材料的抗破裂成形性能逐渐降低，即材料的拉胀成形性能降低。

The cupping tests of 1 mm sheet metal for dual phase steel DP780 and 304 stainless steel were carried out using Komatsu servo press with controlled speed. The influence of punch speed on the test results was studied based on the test Er value (Erichsen value)obtained from the cupping test. Comparing the test result of DP780 dual phase steel to the one of 304 stainless steel, it is found that when the punch speed increases from 3 mm·s-1 to 30 mm·s-1 during the process, the Er value of 304 stainless steel reduces from 9.39 mm to 8.59 mm, and the Er value of dual phase steel decreases from 7.53 mm to 7.39 mm. Therefore, the influence of punch speed on the bulging performance of material is confirmed by the results above, that is,the Er value and resistance to rupture of material reduce gradually with the increasing punch speed within 3-30 mm·s-1, which means that bulge forming performance of material decreases.

基金项目：

国家自然科学基金资助项目（051301105）

程令霞（1987-），女，硕士研究生

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