| 摘要 |
PURPOSE:To obtain a good product in manufacturing a gear-like product by using a pair of rolling dies by reversing the rotation of dies during rolling and thereyby offsetting errors in tooth profile. CONSTITUTION:A work 3 is rolled to work a gear 31 while moving a die 1A together wirh a main shaft 1 in the direction of an arrow, and narrowing the distance between axes of the die 1A and die 2A. In initial rolling work, the work 3 is rotated counterclockwise and working is mae while narrowing the distance between axes until the position at which engagement is performed at Dp<1> which is greater than the final finish pitch diameter Dp of the gear 31 by DELTADp. Then, rotation of dies 1A, 2A is stopped and rotated in the reverse direction, that is clockwise, and the die 1A is moved toward the work 3 again. Rolling is performed while narrowing the distance between axes of two dies 1A, 2A to the position of final finish pitch diameter Dp of the gear 31 produced. |
