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在宇航工业中,经常遇到有小孔、特形孔及复杂形状的钛合金零件需要电火花加工。为了研究钛合金电火花加工性能,我们曾进行了TC4钛合金电火花加工性探讨试验,用晶体管脉冲电源,在煤油介质中进行了紫铜、黄铜、石墨电极、正负极性及有无高压等等的加工,结果均不理想,加工后在钛合金工件表面上产生凸泡,在电极表面上出现一个凹坑。用小能量加工时也同样产生,加工越深或者面积越大凸坑越大,电极损坏越严重。 通过试验发现:在蒸馏水(电阻率为375千欧·厘米)中用紫铜电极、负电极、具有270伏高压回路加工较为理想。为了使钛合金在蒸馏水中电火花加工更好的应用,因而进行了本课题的试验研究,现将结果介绍如下。
In the aerospace industry, often encountered holes, special shaped holes and complex shapes of titanium parts require EDM. In order to study the EDM performance of titanium alloy, we have conducted a TC4 titanium EDM discussion, with a pulse power transistor, kerosene medium in the copper, brass, graphite electrodes, positive and negative polarity and the presence or absence of high pressure And so the processing, the results are not ideal, after processing titanium alloy workpiece surface bubble, a pothole on the electrode surface. The same is true when machining with small energy. The deeper the machining or the bigger the area, the larger the embossment, the more serious the electrode damage. Through the test found that: in distilled water (resistivity of 375 kilohms cm) with a copper electrode, the negative electrode, with 270 volts high pressure circuit processing is ideal. In order to make titanium alloy EDM in distilled water better application, so the subject of the pilot study, the results are as follows.