响应曲面法预测铣削力模型及影响因素的分析

通过统计学中的响应曲面法建立了螺旋铣削过程中切削力的二阶模型，并分析了主轴转速、每齿进给量、轴向和径向切削深度等因素对切削力的影响。将主轴回转一个周期时的切削力波形分成几个区间，建立不同切削条件下切削力区间端点的切削力模型，预测一定切削参数范围内任意切削条件下的切削力区间端点值，将各端点的连线用傅里叶级数表示，可得到周期性的切削力波形，该模型的置信度为95％，预测结果和实验测得的数据十分吻合，对实际生产加工中切削参数的优化选取具有一定的指导作用。

Milling Force Prediction and Analysis Using Statistics Method

A quadratic model of predicting helical milling force was researched. The effects of spindle speed, feed per tooth, and axial and radial depth of cut were analyzed. The measured milling force wave per spindle revolution is divided into suitable intervals. The end values of each milling force interval can be predicted for any cutting conditions within the certain range of cutting parameters. To link the end points of each interval, a periodical milling force waveform can be built by means of the expansion of the Fourier series. The predicted model is adequate for a 95% confidence interval, and it shows a very satisfactory agreement with those obtained by the experiments.