图示夹具是以锥柄定位,安装于车床主轴的锥孔内。工件装在夹具顶尖和车床尾座顶尖之间。使用时用螺钉1压紧鸡心夹头4,并使其在圆盘3的相对位置固定下来。在盘2的圆周上均布12个切槽并刻有标线,使用时根据蜗杆螺纹头数,转动圆盘3使对定装置5插到花盘2上相应的槽内,再紧固 The picture shows the fixture is taper shank positioning, installed in the taper hole of lathe spindle. The workpiece is mounted between the tip of the fixture and the center of the lathe tailstock. Use the screw 1 to clamp the center of the collet 4, and make it fixed in the relative position of the disc 3. On the circumference of the disc 2 are evenly distributed 12 slots and marked with a standard line, when used according to the number of worm screw head, turn the disc 3 so that the matching device 5 inserted into the corresponding grooves on the face plate 2, and then tighten