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水表零件如图1,内腔底部螺孔M9×1.25,外螺纹M80×2,为保证同心度,这两种螺距的螺纹必须在同一工位上加工完成。为达此目的,设计制造了如图2的螺纹加工刀盘。其结构和动作原理如下。 攻丝动力头的靠模螺距选用2mm,刀盘随动力头主轴旋转并按每转螺距2mm进给。刀体1上装有4块螺距为2mm的螺纹梳刀2,可以在工件上切削出M80×2的外螺纹。刀杆3与刀体内孔滑动配合,刀体旋转运动由销4传给刀杆,刀杆上的丝锥随主轴和刀盘旋转并进给,当丝锥接触工件攻丝时,
Water meter parts shown in Figure 1, cavity at the bottom of the screw M9 × 1.25, M80 × 2 external thread, in order to ensure concentricity, these two pitch thread must be completed in the same station. To achieve this goal, the design and manufacture of thread machining shown in Figure 2 cutter. Its structure and action principle is as follows. Tapping power head by die pitch selection 2mm, cutter head with power head rotation and feed per pitch pitch 2mm. The cutter body 1 is equipped with 4 thread combs 2 with a pitch of 2mm, which can cut M80 × 2 external threads on the workpiece. The cutter bar 3 is slidably matched with the inner hole of the cutter body, the rotary movement of the cutter body is transmitted to the cutter bar by the pin 4, the tap on the cutter bar is rotated and fed with the spindle and the cutter disc, and when the tap contacts the workpiece tapping,