Title:
自動車用ホイールリムの成形方法
Document Type and Number:
Japanese Patent JP5013711
Kind Code:
B2
Abstract:
A method prevents a cylindrical body from buckling in externally curling edges of both side portions by pressing curling dies in an axial direction after molding the cylindrical body having a drop portion whose outer diameter is small and two side portions whose outer diameter is large by enlarging a cylindrical material made of aluminum alloy by electromagnetic molding. In curling the edges of the side portions, a buckling preventing die restrains an outer periphery of the drop portion of the cylindrical body. Because the buckling preventing die receives the axial compression force of the curling dies, it can prevent the cylindrical body from buckling and deforming. The buckling preventing die is what a split die disposed on the side of an outer periphery of the cylindrical material in the electromagnetic molding is used as.
Inventors:
Mihisa Imamura
Junichi Sato
Daigo Masumoto
Katsuhiro Motode
Junichi Sato
Daigo Masumoto
Katsuhiro Motode
Application Number:
JP2005376441A
Publication Date:
August 29, 2012
Filing Date:
December 27, 2005
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
DAIDO KOGYO CO.,LTD.
DAIDO KOGYO CO.,LTD.
International Classes:
B21D53/30; B21D19/12; B21D26/14
Domestic Patent References:
| JP2005095982A | ||||
| JP2003236637A | ||||
| JP2005052884A | ||||
| JP2004160542A |
Attorney, Agent or Firm:
Kaoru Kamoto