三维槽型重车削刀片有限元模拟仿真与试验研究  

Finite Element Simulation and Experimental Study on Heavy Turning Insert with Three-dimensional Groove

作　　者：刘敏 庞佳[2] 

机构地区：[1]株洲钻石切削刀具股份有限公司,湖南株洲412007 [2]华中科技大学,湖北武汉430074

出　　处：《硬质合金》2012年第2期86-93,共8页Cemented Carbides

基　　金：国家重大科技专项课题(2009ZX04012-021);国家973重点基础研究发展计划项目(2009CB724306)

摘　　要：以热力耦合和温度场模型、材料本构关系及断裂准则等数学模型为理论基础,采用人工加密网格和软件自划分网格两种不同的方法,对自行开发的硬质合金三维复杂槽形重车削刀片的切削过程进行了有限元模拟仿真,并对仿真结果进行了试验验证。研究结果表明:在不同的切削条件下,采用人工加密网格,主切削力的仿真精度在14%～20%左右,而采用软件自划分网格,主切削力的仿真精度达到30%以上;另外,温度方面的仿真,采用人工加密网格比软件自划分网格的仿真结果更符合金属切削原理中切削温度的相关理论。故对重型刀片进行有限元分析时,采用人工加密网格的方法更有利于定性分析和找到刀片优化设计的正确方向。Based on the models of thermal-mechanical coupling and temperature field, and the mathematical models of material constitutive relation and fracture criterion, the cutting process of the developed heavy turning insert with three- dimensional complex groove was simulated by finite element methods of artificial and adaptive mesh refinement. Then the simulation results were verified through the experiment. The results show that, under different cutting conditions, the simu- lation precision is about 14% to 20% in the case of artificial mesh refinement, while it is above 30% in the case of adap- tive mesh refinement. The temperature simulation result of the artificial mesh refinement is more suitable to the cutting temperature theory in metal cutting principle than that of adaptive mesh refinement. Adopting artificial mesh refinement is more beneficial to qualitatively analyze the heavy turning insert by finite element method as well as optimize the design.

关 键 词：三维复杂槽型 重车削刀片 有限元 网格 AdvantEdge FEM 

分 类 号：TG51[金属学及工艺—金属切削加工及机床]