微细特征模压成形实验研究与数值模拟  

Experimental investigation and numerical simulation of coining processing with micro-structural characteristics

作　　者：郑伟[1] 宋立彬[1] 王广春[1] 吴涛[1] 冯超[1] 

机构地区：[1]山东大学材料液固结构演变与加工教育部重点实验室,济南250061

出　　处：《材料科学与工艺》2011年第1期7-11,共5页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50975163);教育部"长江学者和创新团队发展计划"创新团队资助项目(RT0931)

摘　　要：采用微孔模具,改变润滑条件和微孔尺寸,通过万能试验机对不同厚度的纯铜试件进行了微细特征模压成形的实验研究,同时对成形过程进行了数值模拟,分析并给出了微细特征模压成形时的主要变形区域以及成形力的变化特点.实验和模拟结果表明:微细特征尺寸越大,润滑状态越好,成形越容易;适当的坯料厚度可以降低成形的难度;微细特征成形在坯料较薄时存在尺寸效应.本研究揭示了微细特征模压的成形规律及其机理.Under different lubrication conditions,pure copper workpieces with different thicknesses were coined experimentally by using a series of dies with different fine holes on universal testing machine,and the coining processes were simulated,by which the characteristics of main deformation area and load were investigated.The experimental and simulated results shows that when the friction is small and the diameter of the hole is large,the workpiece is easy to be coined.An appropriate thickness of workpiece is helpful for the coining process.When the workpiece is very thin,the so-called ＂scale effect＂ on the coining process with micro-structural characteristics appears.

关 键 词：微细成形 模压 成形规律 变形机理 尺寸效应 

分 类 号：TG306[金属学及工艺—金属压力加工]