关键词: 阶梯孔, 电解加工, 固定阴极, 数值分析, 阶梯式电压

Abstract:

For the structure characteristics and machining difficulties of lightweight stepped hole with big inside and small outside, a fixed cathode electrochemical machining method was proposed to realize the inner hole machining. Taking the center stepped hole on rotation shaft of an airplane landing gear for example，in order to improve the machining quality and efficiency, the cathode structure was optimized firstly based on numerical analysis and experimental verification. Stepped variable voltage machining method was proposed which met the actual production needs. Based on the above, taper of cathode was modified and experiments were conducted. Finally, passable products were manufactured and the process is stable, which can meet the requirements of mass process.

Key words: stepped hole, electrochemical machining, fixed cathode, numerical analysis, stepped voltage