Timing hole punching auxiliary tool for timing spinning belt pulley

A timing hole punching auxiliary tool of a timing spinning belt pulley comprises an upper die and a lower die which are matched with each other. A timing hole punch and a material returning mechanism are arranged on the upper die; the material returning mechanism comprises a material returning plate, a polyurethane rubber sleeve and a material returning screw; the upper end of the material returning screw is freely inserted into an upper screw hole in the upper die plate, and the lower end of the material returning screw is fixed to a threaded hole in the outer ring of the material returning plate; the polyurethane rubber sleeve is sleeved in the middle of the material returning screw; a hole matched with the timing hole punch is formed in the middle of the stripper plate; the lower die comprises a lower die plate, a female die and a positioning device, a plurality of timing holes corresponding to the timing hole punches are formed in the female die, all timing signal holes in the timing spinning belt pulley