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Title:
FLANGED PIPE AND METHOD OF FORMING FLANGED PIPE
Document Type and Number:
Japanese Patent JPH09203456
Kind Code:
A
Abstract:

To provide a method of forming a flanged pipe such as a feed pipe for defining an oil passage in an automobile transmission, in which a flange part and a pipe part are formed integrally with each other, and the diameter of the flange part is enlarged to a value about two times as large as the diameter of the pipe by bulging the flange part.

A pipe 1 is held at its one end in a holding hole 10a in a holder 10, and is inserted therein at its the other end opening with an insertion part 12a of a punch 12 which is then pressed so that a curl forming part in the root peripheral part of the insertion part 12 enlarges and arcuately curves the opening edge of the pipe 1. Further, during this process, the front end part is forced into a fold-back guide groove (m) in the holder 10 so as to be guided, and finally, a hemming part (h) of the front end part is processed simultaneously with the formation of a flange part 1b. Further, the flange part has a diameter which is about two times as large as that of the pipe.


Inventors:
TADA YUTAKA
Application Number:
JP1195696A
Publication Date:
August 05, 1997
Filing Date:
January 26, 1996
Export Citation:
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Assignee:
BESUTETSUKUSU KIYOOA KK
International Classes:
F16L9/02; B21D19/08; B21D19/12; B21K23/04; F16H57/04; (IPC1-7): F16H57/04; B21D19/08; B21D19/12; B21K23/04; F16L9/02
Attorney, Agent or Firm:
小山 有 (外2名)



 
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