摘要
大进给铣削是提高钛合金等难加工材料粗加工效率的先进工艺技术之一,但其切削机理因与常规铣削不同而仍有待进一步研究。为此,以有限元法为研究手段,应用有限元分析软件Deform-3D对Ti6Al4V钛合金大进给铣削过程进行了模拟,分析了每齿进给量对铣削力和铣削温度等参数的影响。结果表明:随着每齿进给量的增加,铣削力和铣削温度均随之增加,每齿进给量对径向切深方向的铣削分力影响最大,最高切削温度出现在切屑与刀具前刀面接触且靠近刃口的位置,工件的最大等效应力分布在第一变形区。此外,与试验结果的对比分析表明,有限元模拟值与实测值的变化趋势一致,铣削力模拟值与实测值数值较为接近,但铣削温度模拟值与夹丝法半人工热电偶实测值仍相差一定数值。
High feed milling is one of the advanced technologies to improve the rough machining efficiency of titanium alloys and other difficult-to-machine materials,but its cutting mechanism is different from conventional milling and still needs further research. Therefore,the simulation process of high feed milling of Ti6Al4 V alloy was established by commercially finite element software Deform-3D,to study the influence of feed per tooth on milling force and milling temperature,etc. The results show that： the milling force and milling temperature increase with the increase of feed per tooth. The influence of feed per tooth on milling force of radial cutting depth is greatest and the maximum milling temperature in the position of contact area between chip and tool rake face which near to the cutting edge. The maximum stress effective distribution of workpiece is in the first deformation zone. In addition,compared with the results of experiment,the change trend of finite element simulation value and experiment value is consistent. The milling force of simulation value and experiment value are relatively close,but the milling temperature simulation value differs with experiment value which by an embedded semi-artificial thermocouple.
出处
《工具技术》
北大核心
2015年第12期31-35,共5页
Tool Engineering
基金
国家科技重大专项(2014ZX04012014)
关键词
3D有限元模拟
大进给铣削
钛合金
铣削力
铣削温度
3D finite element simulation
high feed milling
titanium alloy
milling force
milling temperature
