锻压技术

薄板成形中模具硬度对拉毛影响的实验研究

英文标题：Experimental research on the effect of die hardness on the galling in sheet metal forming

作者：陈新平侯英岢蒋浩民孙芳钟鲍平

单位：宝山钢铁股份有限公司研究院上海交通大学机械工程学院宝山钢铁股份有限公司研究院宝山钢铁股份有限公司研究院宝山钢铁股份有限公司研究院上海201900 上海200240 上海201900 上海201900 上海201900

关键词：高强度钢板拉毛模具硬度

分类号：TG386.32

出版年,卷(期):页码：2008,33(2):31-33

摘要：

借助带拉深筋的盒形件拉深工艺,模拟高强度钢板成形中的覆盖件表面拉毛行为。用表面粗糙度Ra和最大划痕深度H来定量评价冲压件拉毛程度。实验研究表明:随着拉深次数的增加,Ra值和H值越来越大,并且在成形前期和后期其数值增长速度较快;同时,Ra值和H值随模具硬度的降低而增大,即模具的硬度越低,越易于产生拉毛缺陷。

A cup part with draw-beads was designed to simulate the galling in the forming of high strength steel.The average roughness(Ra) and the largest depth of scoring h were used to evaluate the galling.The experimental results show that Ra value and h value become larger with the increase of drawing times,and increase very fast in the initial and final stage of forming process.Meanwhile,with the decrease of surface hardness of die,Ra and h values increase.The lower the surface hardness, the more the galling defects.

基金项目：

参考文献：

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