薄板冲小孔中力学性能研究及生产工艺改进  

Study on Mechanical Properties During Punching Little Holes and Improvement of Manufacturing Process

作　　者：缪军[1] 龚红英[1] 张杰[1] 吕弘毅[1] 廖泽寰 许志敏 MIAO Jun GONG Hongying ZHANG Jie LYU Hongyi LIAO Zehuan XU Zhimin(School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China Shanghai East Cold Forging Co. ,Ltd. , Shanghai 201821, China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海东芙格尔冷锻制造有限公司,上海201821

出　　处：《上海工程技术大学学报》2017年第3期210-214,共5页Journal of Shanghai University of Engineering Science

基　　金：上海工程技术大学校企产学合作资助项目((17)CL-003)

摘　　要：在薄板冲小孔过程中,细长冲头除承受轴向冲裁力的反向作用力外,还会承受与冲孔方向垂直的侧向力,自身刚度较低的冲头会出现弯曲,甚至折断现象.基于薄板小孔冲裁变形机理的分析,推导出冲头屈服强度至少在板料抗拉强度的5倍以上或其抗压强度要在板料抗拉强度15倍以上,才能保证冲头不被挤压变形甚至断裂的力学性能关系,并总结得出增加冲头保护套和使用弹性压卸料装置两种可行的保护措施,最后提出适用于单件小批量孔类零件生产的堆叠式钻孔方法.During the process of punching little holes on steel sheet, in addition to the reverse acting force of the axial blanking force, the thin punch will also bears the lateral force perpendicular to the punch which leads to the bending or even breaking of the punch. Based on the analysis of deformation mechanism of punching little holes on steel sheet, the relationship between the mechanical properties of thin punch and sheet was deduced. The yield strength of punch should be at least 5 times of the tensile strength of the sheet or the compressive strength of punch should be more than 15 times of the tensile strength, the punch is not deformed or even fractured. Two practical protective measures of adding protection sleeve and using elastic pressing device were obtained and the method of stacking drilling which is suitable for the single batch production of parts with little holes was put forward.

关 键 词：冲小孔 冲头 冲裁力 力学性能 堆叠式钻孔 

分 类 号：TG381[金属学及工艺—金属压力加工]