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蜗轮蜗杆传动是机械零件基本传动形式之一,因此广泛地应用于各类机械中。蜗杆螺纹最简便的加工方法是在车床上加工。目前一般使用的切削方法有:左右切削法、片切式切削法、阶梯式切削法和分层式切削法等(见图1)。但是这些切削方法都不够理想,主要有下列不足之处: (1)多数使用高速钢刀具,因此其切削速度一般小于30m/min,生产率较低。 (2)都要分粗车和精车,粗车后的余量须适当。余量太少有可能造成废品;余量过多时,精车不便。 (3)中途要换一次刀,操作较麻烦。粗车时刀具要左右借刀,而拖板导轨间、螺纹螺母间总存在间隙,所以常为此打刀。
Worm gear transmission is one of the basic form of mechanical parts transmission, it is widely used in various types of machinery. Worm thread is the most simple processing method is in the lathe processing. Currently used cutting methods are: left and right cutting method, slice cutting method, step cutting method and the hierarchical cutting method (see Figure 1). However, these cutting methods are not ideal, mainly due to the following deficiencies: (1) most of the use of high-speed steel cutting tools, the cutting speed is generally less than 30m / min, low productivity. (2) should be divided into rough car and fine car, rough car after the margin to be appropriate. Too little residue may cause waste; excess allowance, fine car inconvenience. (3) to change the knife midway, the operation is more troublesome. The rough car when the knife to about borrowing knife, and the carriage board between the threaded nut there is always a gap, so often for this fight.