１概述闸阀和截止阀手轮上的六方孔或四方孔的几何尺寸精度较高，与阀杆螺母或阀杆配合间隙为０１～０３ｍｍ。由于手轮与配合件之间没有滑动，开启和关闭阀门时灵活快速。以前我厂加工手轮六方孔（图１）是在拉床上用拉刀拉削，其缺点是拉刀成本高，拉床加工费用高。... 1 Overview Gate valve and globe valve handwheel hexagonal hole or square hole geometry of high precision, and the stem nut or stem with the gap 0  1 ~ 0  3mm. Since there is no slip between the handwheel and the fitting, the valve is flexible and quick to open and close. In the past, our factory processing handwheel hexagonal hole (Figure 1) was broaching with a broach on the broaching machine. The disadvantage is that broaching costs are high and broaching costs are high. ...