立铣加工过程中的微元铣削力建模分析

针对单纯通过高速切削技术制造某些大型飞机零件过程中,存在难以控制的加工变形和较强表面残余拉应力分布等突出问题,以直齿和螺旋齿立铣加工过程为研究对象,基于微元切削机理,通过对刀齿铣削过程的分析,建立动态铣削加工仿真模型,导出铣削面积、铣削力、主轴扭矩、铣削功率与切削用量的关系.数值模拟结果与试验值较吻合,表明该模型可以实现动态铣削力预测,优化切削用量.

Modeling analysis on infinitesimal milling force in end milling process

As to the outstanding problems that it is difficult to control the processing deformation and strong surface residual tensile stress distribution in manufacturing some large parts of aircraft simply through high speed cutting technology, the end milling progress with straight teeth and helical teeth is taken as the study object. Based on infinitesimal cutting mechanism, a dynamic simulation model is built for milling process by analyzing the milling process of cutters, and then the relationship of cutting amount with milling area, milling force, spindle torque and milling power is derived. The numerical simulation results are consistent with the test results and it indicates that the model can achieve dynamic milling force prediction and optimize cutting amount.