Title:
フランジ付パイプの製造方法
Document Type and Number:
Japanese Patent JP5373277
Kind Code:
B2
Abstract:
An engaging dented portion is formed in a region from an axially intermediate portion of the pipe insertion hole to a position of a connecting surface of a flange on an inner peripheral surface of the pipe insertion hole. The end portion of the pipe is inserted into the pipe insertion hole of the flange so that the end face of the pipe is positioned within a range from the axially intermediate portion of the pipe insertion hole to a position of the connecting surface of the flange. Next, each die segment of an expanding die arranged in the hollow portion of the pipe is moved radially outward of the pipe to thereby subject the end portion of the pipe to an expanding process so that the end portion of the pipe is engaged with the engaging dented portion. With this, the flange is connected to the end portion of the pipe.
Inventors:
Yoji Kawamata
Application Number:
JP2007284234A
Publication Date:
December 18, 2013
Filing Date:
October 31, 2007
Export Citation:
Assignee:
SHOWA DENKO K.K.
International Classes:
B21D39/06; B21D39/20; F16L23/024; F16L23/026; F16L23/028
Domestic Patent References:
| JP2007275932A | ||||
| JP3041113U | ||||
| JP51008659U | ||||
| JP2007222877A | ||||
| JP63042992U |
Foreign References:
| US20030196307 |
Attorney, Agent or Firm:
Hisayoshi Shimizu
Ken Takada
Yoshihito Shimizu
Ken Takada
Yoshihito Shimizu
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