批量生产小型盘类齿轮时,因工件精度要求较高,所以配制专用夹具较困难,尤以内孔定位的工件最明显。为此,我们设计制造了切削抗力自压紧心轴。心轴箭头所指方向(附图)装配在车床的主轴孔内或用卡盘夹紧,校正定位要求。卡盘夹紧时应安止动销1。工件(齿轮)材料为45钢,调质217～255HB。经粗车端面、拉圆孔、拉键槽后,工件装在心轴3上,钢球被压在孔内,防 When mass-producing small disc gears, it is more difficult to formulate the special fixtures because of the higher precision of the workpiece, especially the workpiece with the inner hole being positioned. To this end, we design and manufacture of cutting resistance self-compacting mandrel. The direction indicated by the arrow of the mandrel (drawing) is assembled in the spindle hole of the lathe or chucked to correct the positioning requirements. Chuck should be stopped when moving pin 1. Workpiece (gear) material is 45 steel, conditioned 217 ~ 255HB. After the crude car end, pull the hole, pull the keyway, the workpiece mounted on the mandrel 3, the ball is pressed in the hole, the anti