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在微孔电化学加工中,阴极侧壁区域的工件阳极溶解极易导致加工锥度的产生.为了提高阳极溶解的定域性,采用阴极侧壁绝缘电极进行微孔电化学加工的实验研究.采用直径80～100μm的侧壁绝缘阴极,在0.5mm厚度的不锈钢板(1Cr18Ni9Ti)上加工出一系列微孔.结果表明,阴极侧壁绝缘可以很好地减少加工锥度,从而提高微孔电化学加工精度.此外,减小脉冲宽度及加工电流密度、降低电解液浓度也有益于加工精度的改善.
In the micropore electrochemistry processing, the work piece anodic dissolution in the cathode side wall region can easily lead to the processing taper .In order to improve the localization of the anode dissolution, the cathode side wall insulated electrode is used to carry out micropore electrochemistry processing experiment research. A series of micropores were fabricated on a 0.5mm-thick stainless steel plate (1Cr18Ni9Ti) with a diameter of 80 ~ 100μm.The results show that the insulation of the cathode sidewall can reduce the machining taper and improve the performance of microporous electrochemical machining Accuracy.In addition, reduce the pulse width and processing current density, reduce the electrolyte concentration is also beneficial to improve the processing accuracy.