GEAR SHAPING METHOD AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To improve the productivity of the gear by significantly shortening the manufacturing time of a gear and remarkably improving the operational efficiency of a gear shaping device. SOLUTION: The gear shaping apparatus 10 for forging and forming a gear stock 12 has a fixed die 58 with a fixed gear cutting portion 82 formed thereon, and a movable die 96 with a movable gear cutting portion 112 formed thereon. A gear cutting portion 114 is demarcated by the fixed gear cutting portion 82 and the movable gear cutting portion 112. The gear stock 12 is pressed by a punch 106 downwardly in the perpendicular direction, and the material of the gear stock 12 is allowed to flow in the gear cutting 114 to form a tooth profile portion 118 of a gear 116. The fixed gear cutting portion 82 and the movable gear cutting portion 112 are joined with each other in a state inclined by a predetermined angle to the axial direction.