基于斜角切削的铣削力三维数值模拟  

Three-Dimensional Numerical Simulation of Milling Force Based on Oblique Cutting

作　　者：王保升[1,2] 左健民[1] 汪木兰 侯军明 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]南京工程学院材料学院,南京211167 [3]先进数控技术江苏省高校重点建设实验室,南京211617

出　　处：《组合机床与自动化加工技术》2011年第11期38-42,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：江苏省高校自然科学基础研究项目(08kjb460004);江苏省六大人才高峰项目(2008163)

摘　　要：采用有限元软件建立反映金属切削过程中高温、大应变、大应变率的模型,模拟了Al6061-T6铣削加工中刀具微元的斜角切削过程,得到了微元切削力的变化曲线。利用不同切削厚度的仿真结果,分析了切削力、切削力系数与厚度的关系,建立了切削力系数与切削厚度的函数关系模型。利用此模型,模拟了瞬时铣削力。通过铣削试验获得了相同铣削条件下的铣削力,与模拟铣削力比较,发现两者具有良好的一致性,证明了模型的正确性。为复杂工况下铣削力的研究、工件变形预测以及铣削工艺参数优化奠定了基础。A finite element model was developed and was used to simulate the oblique cutting process of cutting edge discrete element for the Al6061-T6 milling.The model reflects the effects of high temperature,large strain and strain rate to the workpiece material.Cutting force was obtained by simulation,and the relationship between cutting force and chip thickness was established.The relationship between cutting force coefficients and chip thickness was induced from a series of simulation tests,and an inverse proportion model was presented.With the model the instantaneous milling force was simulated.A milling force experiment with the same milling parameters is carried out.A good agreement between simulation and experimental results was achieved and proved the correctness of the model.This work will be a base for milling force modeling with complex conditions,workpiece deformation prediction and optimization of milling parameters.

关 键 词：铣削力 数值模拟 斜角切削 切削力系数 

分 类 号：TH122[机械工程—机械设计及理论] TG501[金属学及工艺—金属切削加工及机床]