Title:
METHOD FOR FORMING WAVE SHAPED BULGE OF TUBE AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3769350
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a wave shaped bulge forming method of a tube and a device therefor, with which the forming time is shortened caused by continuous forming from a pre-forming to a real forming and the high symmetric property to the center line of the formed wave shape and the high degree of freedom for selecting the wave cross-section shape are realized.
SOLUTION: This is a method for continuously executing a pre-forming process and a real forming process, in the pre-forming process, a wave shape 1a of bulging outside is produced with the deformation of rubber by the crushing pressure added to a hollow urethane rubber 2 by stroking, in the compressing direction, a pressing side inner die 10 and an outer die 11 having an individual pressing means against a locked pressure receiving side inner die 12 and a fixed pressure receiving side outer die 13, and in the real forming process, by releasing the pressure to the pressing side inner die 10, only adding the pressure to the pressing side outer die 11 and stroking the pressing side inner die 10 and the pressure receiving side inner die 12 in the direction to loose the deformation of rubber with synchronizing to the compression stroke of this pressing side outer die 11, the wave shape 1a is regulated while adding the pre-pressure to the wave shape 1a from the inner side with the hollow urethane rubber 2.
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Inventors:
Yukio Koike
Application Number:
JP8620097A
Publication Date:
April 26, 2006
Filing Date:
April 04, 1997
Export Citation:
Assignee:
Calsonic Kansei Co., Ltd.
International Classes:
B21D22/02; F16L11/11; B21C37/15; B21D22/10; F16L9/06; (IPC1-7): B21D22/10; B21C37/15; F16L11/11
Domestic Patent References:
| JP56144830A | ||||
| JP8128127A | ||||
| JP59133021A |
Attorney, Agent or Firm:
Satoru Asakura
Masamichi Ayata
Masao Nishimura
Masamichi Ayata
Masao Nishimura
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