球头铣刀加工钛合金零件的铣削力特性

Milling Force Characteristics of Titanium Alloy Parts Machined by Ball-end Milling Cutter

在钛合金的铣削加工过程中,切削力特性将对零件的最终加工质量有重要的影响.对用球头铣刀铣削钛合金工件的切削力特性进行研究.首先建立了用球头铣刀对Ti-6Al-4V铣削加工的切削力数学模型,并通过编写程序求解得出了瞬时切削力及其变化规律;其次建立了球头铣刀对Ti-6Al-4V铣削加工的有限元仿真分析模型,获得了铣削过程中铣削区域的应力场、温度场等;最后设计并完成了切削力测试实验,将得到的实验数据进行了正交分析.结果表明切削参数对平均铣削力影响程度大小的顺序为:轴向切深、每齿进给量、径向切深和主轴转速.

In the milling process of titanium alloy parts,the cutting force characteristics will exert an important influence on the final machining quality of the parts.The cutting force characteristics of milling titanium alloy with ball-end milling cutter are studied.Firstly,the mathematical model of cutting force for Ti-6 Al-4 V milling with ball-end milling cutter is established,and the instantaneous cutting force and its variation law are obtained by compiling program.Secondly,the simulation model of Ti-6 Al-4 V milling with ball-end milling cutter is established by using finite element analysis software,and the stress field and temperature field in milling area are obtained.Finally,the cutting force test experiment is designed and completed,and the experimental data are analyzed by orthogonal design.The results show that the influence of cutting parameters on the average milling force is in the order of axial cutting depth,feedrate per tooth,radial cutting depth and spindle speed.