Title:
【発明の名称】ベベルギア軸部の製造方法
Document Type and Number:
Japanese Patent JP3228510
Kind Code:
B2
Abstract:
PCT No. PCT/JP92/00675 Sec. 371 Date Jan. 18, 1994 Sec. 102(e) Date Jan. 18, 1994 PCT Filed May 21, 1992 PCT Pub. No. WO93/23186 PCT Pub. Date Nov. 25, 1993A method for producing a bevel gear shaft, adaptable to produce a shaft having a desired recess shape, such as an involute spline, in the longitudinal direction. A blank, having a bevel gear portion complementary to an upper die and a shaft portion small enough to fit into a lower die, is utilized in the process. The product is formed to the shape of upper and lower dies held together in a press. An upper punch passes downward through the upper die and a lower punch passes upward through the lower die. The punches displace some of the raw material of the blank forcing it to bulge and take on the shape of the upper and lower dies. The bevel gear portion may be coined by the upper die simultaneously with the forging of the bevel gear shaft. The invention shortens production time, increases product strength, and improves product yield per unit weight of raw material.
Inventors:
Yoji Tanaka
Katsunori Noda
Kazuaki Okajima
Katsunori Noda
Kazuaki Okajima
Application Number:
JP51054392A
Publication Date:
November 12, 2001
Filing Date:
May 21, 1992
Export Citation:
Assignee:
Nichidai Co., Ltd.
International Classes:
B21K1/30; F16H55/17; (IPC1-7): B21K1/30; F16H55/17
Domestic Patent References:
| JP60184444A |
Attorney, Agent or Firm:
Minako Uchiyama (2 outside)