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目前,微小孔的加工方法有数十种,在机械加工方面,有高速钻孔,冲孔,拉孔,铰孔等。在特种加工方面,有激光,电子束,电解,超声,电火花等。但上述这些方法都有一定适用范围。我们结合纺织机械零件的特点,研究了微孔的超声放电加工技术,它利用了超声及放电加工的优点,加工的微孔最小孔径达0.05mm,深径比达40以上。加工速度比一般放电加工提高了数倍到数十倍,加工精度有一定提高,微孔光洁度也有一定改善。超声放电加工用的设备,见图1。现将其效果和原因简介如下: 一、超声回转放电加工的效果 1.提高加工速度——图2曲线比较了放电工具电极上加超声与不加超声时的加工速度。当加工厚度为0.4mm时,加超声的加工时间要比不加超声的少
At present, there are dozens of processing methods for the tiny holes. In the machining, there are high-speed drilling, punching, pulling holes and reaming holes. In special processing, there are laser, electron beam, electrolysis, ultrasound, sparks and so on. However, these methods have a certain scope of application. We combine the characteristics of textile machinery parts, studied the microporous ultrasonic discharge machining technology, which takes advantage of ultrasonic and EDM processing, processing the smallest hole diameter of 0.05mm, depth-diameter ratio of 40 or more. Machining speed than the average EDM increased several times to several times, machining accuracy has improved, there is also some improvement in the micropore finish. Ultrasonic discharge machining equipment, shown in Figure 1. Now the effect and reasons are as follows: First, the effect of ultrasonic rotary discharge machining 1. Increase the processing speed - Figure 2 curve to compare the discharge tool electrode with ultrasonic and without ultrasonic processing speed. When the processing thickness of 0.4mm, plus ultrasonic processing time than without ultrasound