When we produce the milling machine spindle, we need to process the involute spline of 200mm length, z=24, m=3 (Fig. 1). To this end, we designed the clamping device used on the YM3180H gear hobbing machine, the effect is better. The two V-shaped faces of the bracket 7 (Fig. 2) are fixed on the hobbing machine column guide rail, the copper sleeve 3 supports the φ85mm portion of the workpiece, and the three-jaw centering chuck 16 clamps the small end of the φ64 mm outer circle to ensure
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