Title:
PRODUCTION OF GEAR
Document Type and Number:
Japanese Patent JP3569852
Kind Code:
B2
Abstract:
PURPOSE: To excellently shape a tooth by pre-forming a recessed part to assist building-up of the tooth on the end face of the direction of tooth width.
CONSTITUTION: The tooth part G of a gear is built up with a die and formed in a forging process, a heading process and a sizing process. Then, a recessed groove 13 is formed in a recessed state on the end face of the direction of tooth width along the dedendum circle, and a recessed part 14 projecting to the outer circumference side than the dedendum circle is formed in a recessed state on each tooth part G continuing to the recessed groove 13. The recessed part 14 to be formed on each tooth part G can be set so that the thickness against the line of external diameter of the tooth part G is made, for example, more than 1.5mm, if such recessed groove 13 and recessed part 14 are formed, building-up with the die can be assisted more excellently and lightening of the gear can be made. In such a way, the gear having the tooth shape with large strength and the gear of light weight can be produced.
Inventors:
Yoshio Haruhara
Application Number:
JP26156794A
Publication Date:
September 29, 2004
Filing Date:
September 30, 1994
Export Citation:
Assignee:
Aichi Machine Industry Co., Ltd.
International Classes:
B21K1/30; (IPC1-7): B21K1/30
Domestic Patent References:
| JP62166029A | ||||
| JP59039442A |
Attorney, Agent or Firm:
Yoshihisa Shimizu