A cold extruding die for producing rectangle external splines hollow shaft has

The utility model discloses a cold extruding die for producing rectangle external splines hollow shaft has includes mould and lower mould, goes up the mould and installs on the hydraulic press, and the lower mould is fixed on the table surface of hydraulic press. Go up the mould and include cope match -plate pattern, upper die base, go up mould overcoat and drift, the upper die base is fixed install in the lower surface of cope match -plate pattern, upward the mould overcoat is fixed installs in the lower surface of upper die base, and the drift is installed on last mould overcoat. The lower mould includes lower bolster, die holder, lower mould overcoat and mold core down, and the die holder is fixed to be installed on the lower bolster, and the lower mould overcoat is fixed to be installed on the lower bolster, and lower mold core is colded pressing through tapering interference fit and is adorned in the lower mould overcoat, and lower mould in -core portion is equipped with shaping die cavity, and the die cavity inner wall that should take shape be equipped with a plurality of shaping portions that have the rectangular channel, and the lower bolster is corresponding with the die holder it has offered the discharge opening to become the die cavity. The utility model discloses an above -mentioned mechanism design can improve the quality of hollow shaft, improves production efficiency, improves material utilization rate and reduction in production cost.