比较新式的车床(如1A62)的走刀箱内,都有车蜗杆螺纹的变速机构。但一般的公制或英制齿轮车床的走刀箱内,是没有这种变速机构的。而只有车每吋牙数和螺距的变速机构。所以操作者遇到在一般齿轮车床上车制蜗杆螺纹时,就感到困难。现在我们介绍一种在一般车床上车蜗杆螺纹的配换齿轮计算方法。计算配换齿轮前,先变换一下走刀箱上的手柄。交换手柄时,可以把铭牌上每吋牙数位置看作蜗杆螺纹径节(D.P.)数的位置;螺距位置看作蜗杆螺纹模数(M)的位置。然后在铭牌上找到需车的蜗杆螺纹的径节或模数 The relatively new lathe (such as 1A62) in the box, there are worm gear worm gear. But the general metric or inch gear lathe in the box, there is no such speed change mechanism. And only the number of teeth per tooth and pitch of the gearbox. So the operator encountered in the general gear lathe worm screw system, it is difficult. Now we introduce a replacement gear calculation method of worm screw in general lathe. Calculate the gear change, the first switch on the handle box handle. When exchanging handles, consider the position of each inch on the nameplate as the number of D.P. threads; the pitch position is taken as the position of the worm thread modulo (M). Then find the diameter or modulus of the worm thread on the nameplate