| 摘要 |
PROBLEM TO BE SOLVED: To improve the precision of a form-rolled gear by performing a hot generating form-rolling process by using roller-dies and a warm finish form- rolling process by using finish roller-dies in this order. SOLUTION: A blank 7 is held with a first blank holding part 11. A second motor 22 is driven, and the blank 7 is arranged in a high frequency induction heating coil 28 and rotated in this circumferential direction to induction-heat the outer peripheral part with the high frequency induction heating coil 28. The blank 7 is carried further in the arrow mark Y1 direction with the second motor 22 and arranged to a working position R1. The first and the second roller-dies 32, 42 are pushed while mutually synchronizing to the outer peripheral part of the blank 7. By this method, suitable pieces of tooth parts are generated with the hot generating form-rolling. After completing the hot generating form- rolling, the blank 7 is arranged to a finish working position R2 and the rotated first and second finish roller-dies 31, 43 are pushed while mutually synchronizing to the blank 7. By this method, the tooth part of the blank 7 is finish-form-rolled in the warm temp. range. |
