System for forming end flanges on pipes

Details System for forming end flanges on pipes System for forming end flanges on pipes

B - Operations, Transporting

21

D

B21D 19/08 (2006.01) B21D 17/02 (2006.01) B21D 19/00 (2006.01)

Patent

CA 2086302

The system increases the diameter to which pipe flanges can be flared. The tendency of the radial wall of the flange to crumple inwards is obviated by coining the transition corner of the wall. First, the pipe end is belled out to provide access for the coining punch. The belled-out end is then swaged back in, after the punch is removed. with the corner transition thus pre- conditioned, further axial pressure on the pipe with a suitable female punch causes the flange to expand diametrally in a controllable manner.

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