Method of and apparatus for forming gears.

摘要

A gear is formed in a gear-forming apparatus including a die block (53) formed with an axial bore (55) and a plurality of teeth (57) radially projecting into the bore and having lead-in portions (57a) adjacent one axial end of the bore, and an elongated mandrel (68) axially movable into the bore, by placing at least one blank in position outside the die block (53) and adjacent the axial end of the bore (55), causing the mandrel (68) to extend through the center hole in the blank; forcing the blank into the bore (55) from the axial end of the bore until the blank is moved past the teeth (57) of the die block (53) so that the blank is caused to form gear teeth on its outer peripheral surface by the teeth (57) of the die block (53); driving at least one of the die block (53) and the mandrel (68) to move with respect to each other so that the gear resulting from the blank is withdrawn together with the mandrel (68) out of the bore (55) in the die block (53); and removing the gear from the mandrel (68) outisde the die block (53).