Title:
HYDROSTATIC FORMING METHOD AND STRUCTURE FOR SUPPORTING END OF WORK USED IN HYDROSTATIC FORMING
Document Type and Number:
Japanese Patent JP3848909
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a hydrostatic forming method by which excessive pulling-in of the end part of a tubular work in toward the middle area in the length direction of the axis of a work is restrained when performing hydrostatic forming and the supporting structure of the end of the work used in the hydrostatic forming.
SOLUTION: A means for transmitting the direction change of pressure receiving force is arranged on the side of the inside wall surface 20i of the end part 20 of the tubular work 2 by using the means for transmitting the direction change of pressure receiving force having a pressure receiving body 3 having a pressure receiving surface 34 and a work restraining body 4 having a restraining surface 42. The restraining property of the end part 20 of the tubular work 2 is raised by pressurizing the restraining surface 42 of the work restraining body 4 along the outward direction ( the direction of the arrow Y1 ) of the diameter of the tubular work 2 against the inside wall surface of the end part of the tubular work 2 by receiving the liquid pressure of the hollow chamber 21 of the tubular work 2 by the pressure receiving surface 34 of the pressure receiving body 3 and also changing the direction of the receiving force received by the pressure receiving surface 34 as force in the outward direction of the diameter of the tubular work 2.
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Inventors:
Uchikawa Yoshiyuki
Application Number:
JP2002277817A
Publication Date:
November 22, 2006
Filing Date:
September 24, 2002
Export Citation:
Assignee:
Aisin Takaoka Co., Ltd.
International Classes:
B21D26/033; B21D26/041; B21D26/047; (IPC1-7): B21D26/02
Domestic Patent References:
| JP10277660A | ||||
| JP11028539A | ||||
| JP2000084622A | ||||
| JP61122018U |
Attorney, Agent or Firm:
Hiroshi Okawa
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