Title:
バルジ成形方法
Document Type and Number:
Japanese Patent JP4748861
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a bulge forming method capable of forming a product of high precision having less reduction of the plate thickness, capable of requiring less forming time at low pressure and of requiring inexpensive equipment. SOLUTION: After a prescribed region of small diameter round pipe stock is expanded in a No.1 process, pressing force is given to the expanded pipe to form a bent pipe P2 and then, a rectangular pipe is formed by adding crushing pressure against the bent pipe P2. And, as a crushing direction at the time of forming the rectangular pipe, when light is irradiated from the light irradiation source S in the lateral side, rotating the rectangular pipe around the revolving shaft J, crush forming is performed from the right-angled direction against the projector direction when the length of shadow in the longitudinal direction is the shortest.
Inventors:
Horiide
Manabu Maruyama
Yuji Kanai
Kageyama Yoshihiro
Kenji Miyanaga
Takaki Mizutani
Manabu Maruyama
Yuji Kanai
Kageyama Yoshihiro
Kenji Miyanaga
Takaki Mizutani
Application Number:
JP2001011623A
Publication Date:
August 17, 2011
Filing Date:
January 19, 2001
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
B21D26/033; B21D7/06; B21D22/02; B21D26/039; B21D26/041
Domestic Patent References:
| JP8192238A | ||||
| JP57019114A | ||||
| JP2000246361A | ||||
| JP1040121A |
Attorney, Agent or Firm:
Yu Koyama
Tomiho Inamoto
Osamu Kataoka
Tomiho Inamoto
Osamu Kataoka