斜刃刃口凸模对微冲裁过程的影响研究  

Influence of Inclined Edge Punch on Micro Blanking Process

作　　者：张荣华 马腾 杨君峰 余祖元[1] 李国栋 夏恒[2] ZHANG Ronghua;MA Teng;YANG Junfeng;YU Zuyuan;LI Guodong;Natsu Wataru(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China;Department of Mechanical Systems Engineering,Tokyo University of Agriculture and Technology,Tokyo 184-8588,Japan)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024 [2]东京农工大学机械系统工程系,日本东京184-8588

出　　处：《电加工与模具》2023年第3期58-65,共8页Electromachining & Mould

基　　金：国家自然科学基金项目(52275408)。

摘　　要：微冲裁作为一种微成形加工方法,是利用微型凸模对板料中的一部分沿微型凹模的封闭曲线从整体中分离。针对细长形状零件冲裁过程中易出现凸模断裂的情况,研究凸模底部刃口形状对微冲裁过程的影响,通过实验采集的冲裁力和冲裁位移数据,建立了有限元仿真模型,优化设计凸模底部刃口形状,降低冲裁力的峰值,为凸模最优刃口的选择提供参考。基于微细电火花加工技术,在线制备出平刃凸模及底部斜刃高度为50μm的斜刃凸模,并在厚度为100μm的304不锈钢箔料上进行微冲裁实验,通过比较采集的实验与仿真数据,验证了模型的可行性,结果表明:采用斜刃刃口凸模可降低峰值冲裁力,获得成形质量较好的异形复杂截面形状的落料件。As one of micro forming techniques,micro blanking provides an alternative method for the mass and efficient production of micro parts.A micro part is separated from a piece of sheet metal by micro blanking.However,in the blanking process,the punch is broken easily when a thin and long micro part is blanked.In order to study the influence of the bottom edge shape of punch on the micro blanking process,a finite element simulation model is used to analyze the peak value of punching force based on the collected data of blanking force and blanking displacement,to design the optimal punch edge shape.Based on the micro-EDM technology,the flat edge punch and the bottom inclined edge punch with a height of 50μm were prepared online,and the micro-blanking experiment was carried out on the 304 stainless steel foil with a thickness of 100μm.Comparing the collected experimental and simulation data,the feasibility of the model was verified,and it was shown that the use of the inclined edge punch can reduce the peak blanking force,and obtain the blanking parts with good forming quality and complex cross-section shape.

关 键 词：微冲裁 有限元仿真 微细电火花加工 斜刃刃口凸模 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]