Claims
- 1. A method of manufacturing an undetachable flange joint characterized in that it is practiced by way of the steps of
- preparing two semi-circular clamp halves having a concave cross-sectional configuration by press forming a strip of sheet metal into a V-shaped cross-sectional configuration,
- providing each said clamp half with a first and a second end part,
- arranging said clamp halves opposite to one another with said first end parts having an annular link hung therearound,
- causing said first end parts to be subjected to a curling operation in such a manner as to encase said annular link in the curled said first end parts to join said clamp halves at said first end parts,
- mounting the pair of half assembled clamp halves around two whole flanges to be joined to one another so that the internal circumferential lateral surface of said clamp halves is caused to come in contact with the external circumferential lateral surfaces of said two flanges to be connected together,
- hanging an annular link around said second end parts of said clamp halves,
- causing the latter to be subjected to another curling operation in the same manner as described above so as to join said clamp halves at said second end parts, and
- said curling operations are performed by advancing a curl punch between said clamp halves.
Priority Claims (1)
Number |
Date |
Country |
Kind |
57-2327 |
Jan 1982 |
JPX |
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Parent Case Info
This application is a divisional of copending application Ser. No. 454,033, filed on Dec. 28, 1982, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
507903 |
May 1953 |
BEX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
454033 |
Dec 1982 |
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