电火花加工表面微织构仿真与实验研究

Simulation and experimental study on micro texture of EDM surface

表面微织构在抗磨减阻、机械密封和改善接触面润滑状态等方面应用颇多,但采用传统的机械加工方法在高硬度、形状复杂的零件表面加工微织构是极其困难的。采用电火花加工技术在GCr15淬硬钢零件表层加工凹坑状微织构,首先在ANSYS平台上模拟微织构加工过程中温度场变化情况,并对织构的深径比进行预测,其次搭建实验平台进行操作加工,采用超景深显微镜对加工后织构形貌特征进行观察测量,对比仿真与实验结果两者误差小于10%,验证了该方法是一种有效的表面微织构加工工艺方法。

Surface micro-texture is widely used in anti-wear and drag reduction,mechanical sealing,and improving the lubrication state of the contact surface.However,it is extremely difficult to process micro-texture on the surface of high-hardness and complex-shaped parts using traditional machining methods.This paper uses EDM technology to process the pit-like micro-texture on the surface of GCr15 hardened steel parts.First,the temperature field changes during the micro-texture processing are simulated on the ANSYS platform,and the depth-to-diameter ratio of the texture is predicted.An experimental platform was set up for operation and processing,and the experimental results were observed and measured with an ultra-depth-of-field microscope.The error between the simulation and the experimental results was less than 10%,which verified that the method is an effective surface micro-texture processing method.