高速磨粒流动辅助电解复合加工方法

High-speed Abrasive Particle Flow Assisted Electrochemical Machining Method

针对难加工材料表面抛光难、工具损耗严重、加工效率低的问题,提出了一种高速磨粒流动辅助电解加工的方法,通过在电解液中添加微小磨粒,伴随电解液高速流动实现电化学溶解与钝化膜微量磨削的复合加工。针对该方法的加工参数进行了分析,研究了加工时间、加工电压、加工间隙、电解液浓度、电源种类、磨粒粒径对实验结果的影响。结果表明:采用5 V电压的直流电源,以质量分数10%的NaNO3作为电解液,设定加工间隙1 mm,用1200目的磨粒加工5 min,可得到表面质量较好的工件,表面粗糙度Ra<0.1μm。

Aiming at the problems of difficult surface polishing,severe tool wear and low processing efficiency,a high-speed abrasive particle flow assisted electrochemical machining method was proposed.By adding tiny abrasive particles to electrolyte,the combined machining of electrochemical dissolution and micro-grinding of passivation film was achieved with high speed flow of electrolyte.The effects of processing parameters including processing time,processing voltage,processing gap,electrolyte concentration,type of power source and abrasive particle size on the test results were studied.The results show that setting the parameters of a DC power source at 5 V,electrolyte of 10%NaNO3,a machining gap of 1 mm and processing with 1200 mesh abrasive particles for 5 minutes,the better surface quality of the workpiece can be obtained,of which the roughnessless than Ra0.1μm.