In response to the urgent need for machining tiny holes with complex postures in special materials without a recast layer in the aerospace field,this article combined the advantages of electrical discharge machining(EDM)and ultrasonic vibration drilling.This approach systematically overcame the core technologies of such equipment in terms of CNC systems,electrical systems,mechanical systems,and processing methods.Based on the need for precise positioning of tiny holes with complex postures,a six-axis CNC system for composite machining was developed using the Windows and the RTX framework.A discharge control module based on an SoC chip and a composite machining control circuit were designed.A coaxial coupling machining mechanism for EDM and vibration drilling was designed.A composite machining test platform was set up,and composite machining experiments were conducted.Using the machining of tiny holes in single-crystal superalloy,a typical special material,as an example,the EDM ultrasonic vibration composite machining achieved an average of 55 seconds per hole with a surface roughness of less than Ra0.8 μm and no recast layer.
关键词
复杂位姿/重铸层/Windows+RTX框架/精密加工
Key words
complex orientations/recast layer/Windows and RTX framework/precision machining
维普
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