(TiB+TiC)/TC4复合材料电解钻孔试验研究

钛基复合材料是一种典型的难加工材料,采用传统机械加工方法存在加工效率低和加工质量差等问题。利用电解加工技术,采用直径为10mm的管状阴极,对(TiB+TiC)/TC4复合材料进行电解钻孔加工试验研究。进行了(TiB+TiC)/TC4复合材料的电化学特性研究,测量了(TiB+TiC)/TC4复合材料在10%NaNO₃溶液中的极化曲线和电流效率。探究了加工电压、电解液压力对加工精度的影响。结果表明,当加工电压为30V,电解液压力为0.6MPa时,电解钻孔可以在1mm/min的进给速度下稳定加工。当加工的盲孔深径比为3.06时,孔的圆度误差为41.1μm,锥度为0.4°,具有较高的加工精度。

Experimental Investigation of Electrochemical Drilling of(TiB+TiC)/TC4 Composites

Titanium matrix composites is a kind of typical hard-to-cut materials,and traditional machining methods have problems such as low machining efficiency and poor machining quality.To this end,experimental investigation on electrochemical drilling of(TiB+TiC)/TC4 composites using a tubular cathode with a diameter of 10mm was conducted.The electrochemical characteristics of(TiB+TiC)/TC4 composites were studied.The polarization curves and current efficiency of(TiB+TiC)/TC4 composites in 10%NaNO₃ solution were measured.The influence of processing voltage and electrolyte pressure on processing accuracy was explored.The results show that when the machining voltage is 30V and the electrolyte pressure is 0.6MPa,the electrochemical drilling process is stably at a feed speed of 1mm/min.When the depthto-diameter ratio of the machined blind hole is 3.06,the roundness error of the hole is 41.1μm and the taper is 0.4°,which shows the high machining accuracy of the electrochemical drilling method.