薄板成形中模具硬度对拉毛影响的实验研究  

Experimental research on the effect of die hardness on the galling in sheet metal forming

作　　者：陈新平[1] 侯英岢[2] 蒋浩民[1] 孙芳钟[1] 鲍平[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900 [2]上海交通大学机械工程学院,上海200240

出　　处：《锻压技术》2008年第2期31-33,共3页Forging & Stamping Technology

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.

关 键 词：高强度钢板 拉毛 模具硬度 

分 类 号：TG386.32[金属学及工艺—金属压力加工]