一种新的铣刀刀齿等效直径确定方法

为确定铣刀刀齿的等效直径，建立了铣刀的等效模型，将铣刀分为刀杆和刀齿两个子结构，基于子结构分析和理论计算的结果建立刀齿等效直径优化的目标函数，采用遗传算法优化确定刀齿的等效直径。以5把不同参数的2刃、3刃和4刃铣刀为研究对象，采用该方法确定刀齿等效直径，据此计算铣刀刀尖点的频响函数，并与等质量法确定的刀齿等效直径所计算的铣刀刀尖点频响函数及其实验值进行对比。分析结果表明，该方法具有更高的计算精度及更好的适用性。

A New Method for Determining Equivalent Diameters of Milling Cutters

In order to determine the equivalent diameters of milling cutters, an equivalent model of milling cutters was established, which was divided into tool holder and cutter teeth, then based on structural analysis and results calculated theoretically, the target function of optimizing cutter teeth equivalent diameters was established, and cutter tooth's equivalent diameters were determined using genetic algorithm. Taking several two fluted milling cutters, three fluted ones and four fluted ones with different parameters as the study objects, adopting the proposed method to determine their teeth's equivalent diameters, which were used to calculate their tool point frequency response functions respectively, and comparing the tool point frequency response functions calculated by the proposed method with ones calculated by equivalent mass method and experimental results. It is shown that the proposed method has higher calculation accuracy and better adaptation.