一种高硬度弧齿锥齿轮电解加工阴极装置设计研究

Research on cathode device for electrolytic machining of high hardness spiral bevel gear design

针对高硬度材料的弧齿锥齿轮加工,提出适用于电解加工阴极刀具结构的设计方法,以改善高硬度弧齿锥齿轮传统双面铣削加工存在的齿形面精度低、啮合质量差、刀具磨损严重、加工效率低等问题。利用采样点偏置法对弧齿齿面进行建模并描述其特征,根据平衡间隙理论,设计弧齿锥齿轮阴极刀具形状,合理布局型腔主流道及分流道结构。对加工淬火后的20CrMnTi齿轮制件进行实验验证,由测量结果可知零件精度及表面质量较高,实现了高硬度弧齿锥齿轮的加工要求。

Aiming at the machining of spiral bevel gear with high hardness material,the design method of cathode tool structure which is suitable for electrolytic machining is put forward.The structure design method of cathode tool for spiral bevel gear effectively improves the traditional double side milling of high hardness spiral bevel gear,which has the problems of low precision of tooth profile,poor meshing quality,serious tool wear and low machining efficiency.Based on the method of sampling point offset,the profile of spiral bevel gear cathode tool and reasonable layout of the cavity main channel and shunt channel structure are designed by using the theory of balanced clearance.The experimental verification shows that the precision and surface quality of the parts are high,and the processing requirements of high hardness spiral bevel gear are realized.