铝合金板电磁冲孔变形过程分析  

Deformation analysis of aluminum alloy sheet in electromagnetic punching

作　　者：黄伍平 程溧 吕枫[1] 邓将华[1] 

机构地区：[1]福州大学机械工程及自动化学院,福州350108

出　　处：《塑性工程学报》2016年第5期62-68,共7页Journal of Plasticity Engineering

基　　金：轻合金加工科学与技术国防重点学科实验室开放基金资助项目(gf201201001);福建省自然科学基金资助项目(2013J01181);福州大学SRTP项目基金(21013)

摘　　要：电磁冲孔是将电磁成形技术应用于材料冲孔工艺的一种高能高速加工方法。采用松散耦合法对铝合金板电磁冲孔过程进行数值模拟,分析板坯的动态变形过程,并进行不同电压铝合金板电磁冲孔试验,验证了模拟方法的可靠性。研究结果表明,电磁冲孔过程中板料以自由胀形的方式产生塑性变形;在变形过程中板料受到拉应力与剪切力的共同作用,以拉应力为主;断口主要表现为被撕裂的拉长韧窝,其断裂方式属于韧性断裂。Electromagnetic punching is a kind of forming method with high energy and high velocity,which is the application of electromagnetic forming technology to material punching process.The numerical simulation of electromagnetic punching for aluminum alloy sheet was performed by using loose coupling method.The dynamic deformation process of sheet was analyzed and the experiment of electromagnetic punching for aluminum alloy sheet was conducted under different discharge voltages.The simulation method was proved to be reliable.The results show that plastic deformation way of metal sheet is the form of free bulging in the process of electromagnetic punching.The sheet is subjected to the combined action of tensile stress and shear stress,and tensile stress plays the main role in deformation process.Fracture morphology is stretched dimple by tearing and the fracture mode is ductile fracture.

关 键 词：电磁冲孔 数值模拟 变形过程 松散耦合法 断口形貌 

分 类 号：TG391[金属学及工艺—金属压力加工]