Splined hole hobbing centering fixture

The invention discloses a splined hole hobbing centering fixture which is characterized by comprising a connecting disk, a positioning disk, a centering shaft, a centering shaft sleeve, a pull rod and a drive device, wherein the connecting disk is fixed on a machine tool, the positioning disk is fixed on the connecting disk, the centering shaft is positioned at the center of the positioning disk, the pull rod penetrates through the axle center of the positioning disk, the lower end of the pull rod is connected with the drive device, the upper end of a workpiece is provided with a press plate, the press plate is pressed through the upper end of the pull rod so as to press the workpiece, the centering shaft sleeve is sleeved on the centering shaft, and the excircle of the positioning shaft sleeve is matched with a positioning splined hole of the workpiece. The invention has the advantages of simple structure, convenience for installation and wide application range, improves positioning precision of hobbing thro