Title:
HELICAL INTERNAL GEAR MACHINING METHOD, AND DIE
Document Type and Number:
Japanese Patent JP2010201442
Kind Code:
A
Abstract:
To enhance the yield by reducing a non-filled part X when forging a helical internal gear.
In a helical internal gear machining method, the back pressure F during the sizing is applied to a material M of a gear forming part 14 at an upper position.
Inventors:
YAGI TETSUJI
Application Number:
JP2009047542A
Publication Date:
September 16, 2010
Filing Date:
March 02, 2009
Export Citation:
Assignee:
YAMANAKA GOOKIN KK
International Classes:
B21K1/30; B21J5/06; B21J13/02
Domestic Patent References:
| JPH07323346A | 1995-12-12 | |||
| JP2003117629A | 2003-04-23 | |||
| JPS6037237A | 1985-02-26 | |||
| JPH01170544A | 1989-07-05 |
Attorney, Agent or Firm:
Takeshi Nakatani