针对淬火钠内螺旋齿轮难加工的问题，讨论了淬火钢内螺旋齿轮电火花加工的方法和装置的设计，分析研究了淬火钢内螺旋齿轮加工的特点和加工原理，分析了工具电极齿轮的修形设计和误差补偿技术，推导了相应的计算公式，并进行了该装置的误差分析。由分析研究得出：电火花加工较好地解决了这类在材质和形状上均有特殊性的齿轮加工问题；考虑放电间隙和电极损耗，工具电极是被加工齿轮的变位和修形齿轮；通过误差补偿和螺旋机构的误差控制可提高电火花加工内螺旋齿轮的加工精度。

Aiming at the problem of machining quenched internal helical gears, a method and its equipment are discussed and designed, which is used for machining quenched internal helical gears by EDM. Its characteristic and principle are proposed. The modifying design of the electrode gear and the calculating method of its modification coefficients is presented. Analyzing for the error of the machining equipment is done. The results show that this problem can be solved by EDM, the electrode gear is the modification gear of machined gear and the machining accuracy can be improved by controlling errors.

TH132.422 TG661

重庆市科委应用基础研究资助项目 (编号 :2 0 0 0 -6 16 7)