齿轮油泵侧盖(如图1)上的双孔,中心距的精度要求较高。在没有座标镗床的情况下,我们设计了一套夹具,在车床上加工侧盖双孔。夹具的结构如图2所示。3是专用花盘。将套筒9打入车床主轴锥孔后,加工内孔,使心轴8与车床回转中心同心。底盘2以心轴8定心,并固定在花盘上。工件借弯板7紧固在摆盘1上。摆盘1与底盘2的结构如图3所示。加工时,用转动支轴5和定位销10,将摆盘上的孔C′和A分别与底盘上的孔C和D对正,然后用螺 Gear pump side cover (Figure 1) on the double hole, the center of the high precision requirements. In the absence of a jig boring machine, we designed a set of jigs to machine double side holes in the lathe. Fixture structure shown in Figure 2. 3 is a special faceplate. After the sleeve 9 is driven into the taper hole of the lathe spindle, the inner hole is machined so that the mandrel 8 is concentric with the turning center of the lathe. The chassis 2 is centered on the mandrel 8 and fixed to the faceplate. The work piece is fastened to the wobble plate 1 by the bent plate 7. Swing plate 1 and chassis 2 structure shown in Figure 3. Processing, with the rotating shaft 5 and the positioning pin 10, the wobbled holes C ’and A, respectively, with the chassis holes C and D, and then with the screw