拼接淬硬钢铣削特性有限元模拟  

FEM Simulation on Milling Feature of Transition Region Assembled Hardened Steels

作　　者：李刚[1] 王扬渝[1] 周浩东 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部重点实验室

出　　处：《工具技术》2014年第5期24-27,共4页Tool Engineering

基　　金：863计划重点项目(2009AA044302);浙江省科技计划项目(2012C31017);现代制造技术与刀具开发黑龙江省高校重点实验室开放课题(2012DJ-002)

摘　　要：研究了拼接淬硬钢过渡区的铣削加工过程,建立了不同硬度下的Cr12MoV淬硬模具钢的本构关系式,采用有限元法对单一硬度和多硬度过渡区的铣削加工过程进行了数值模拟,分析了铣削力的变化规律,揭示了铣削温度场的分布形式。数值模拟结果表明通过有限元模拟的方式可以准确地得到多硬度过渡区的铣削力和温度场的相关信息,铣削力稳定性、温度场分布均匀性与铣削深度等铣削工艺参数有着密切的关系,通过合理的工艺参数优化可以实现过渡区的稳定加工,产生连续而均匀的切屑,形成高质量的表面。The aim of this paper is to investigate the milling process of transition region with different hardness of as- sembled hardend steel. Johnson - Cook constitution models of CrI2MoV hardened steel under different hardness were estab- lished. Based on the finite element analysis, the milling processes of single hardness and assembled with different hardness steels weresimulated, respectively. The variation regular of milling force was analyzed. The distribution of milling tempera- ture field was discussed. The results show that the information of milling force and temperature field can be obtained by n- sing numerical simulation method. The milling processing parameters can influence the stability of milling force and uni- formity of temperature field. So the optimal milling processing parameters can realize the high quality milling of transition region with different hardness of assembled hardend steel, create continuous and homogeneous grindings, form high quality milled surface.

关 键 词：铣削特性 多硬度过渡区 铣削力 温度场 数值模拟 

分 类 号：TG54[金属学及工艺—金属切削加工及机床]