Title:
METHOD FOR MANUFACTURING MOTHER PIPE FOR BULGING, BULGED ARTICLE AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP3835325
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a mother pipe for bulging in which forming failure in bulging is suppressed and process is simplified when a tapered mother pipe as well as a straight mother pipe is used in bulging such as hydraulic bulging, and provide a bulged article, and provide a method for manufacturing the same.
SOLUTION: The mother pipe for bulging is produced through a first processing process in which a material 1 is formed into the mother pipe for bulging and through a second processing process in which the material 1 is processed to make bulging easier, and the second processing is carried out before the first processing process is completed.
Inventors:
Atsushi Tomizawa
Application Number:
JP2002085818A
Publication Date:
October 18, 2006
Filing Date:
March 26, 2002
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21C37/15; B21C37/08; B21D5/01; B21D5/12; B21D26/033; B21D26/035; B21D26/057; B21D35/00; B21D53/84; B21D53/88; (IPC1-7): B21C37/15; B21C37/08; B21D5/01; B21D5/12; B21D26/02; B21D35/00; //B21D53/84; B21D53/88
Domestic Patent References:
| JP8010832A | ||||
| JP2000309853A | ||||
| JP64034515A |
Attorney, Agent or Firm:
Shoichi Hirose
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