在加工中,发现用活络扳手套螺纹很方便。先用尾座把板牙顶在要套螺纹的工件上,见图1(如果板牙外圆小于尾座锥孔,可装上钻头套筒)。再用扳手轻轻夹住板牙外圆,见图2。板牙外圆上有一条定位槽,用一片垫刀铁板,卡在定位槽和扳手之间。开动车床,轻摇尾座跟进,即可进行套螺纹。套好工件后,退出尾座,开倒车,把铁板卡在扳手另一边,就能退出板牙。 In the process, found that with an active spanner thread is very convenient. First with the tailstock to the top of the tooth to thread the workpiece, shown in Figure 1 (if the die is less than the outer cylindrical tail cone hole, you can install the drill sleeve). Then use a wrench gently clamping the outer edge of the die, see Figure 2. There is a positioning groove on the outer circle of the toothbrush, with a knife blade iron plate stuck between the positioning groove and the wrench. Turn the lathe, flick the tailstock follow-up, you can set the thread. Set the workpiece, the exit from the tailstock, open the reverse, the iron card in the wrench on the other side, you can exit the teeth.