Method for cold joining a coupling element to a pipe

Details Method for cold joining a coupling element to a pipe Method for cold joining a coupling element to a pipe

2005-03-18

2011-11-15

Nguyen, Donghai D. (Department: 3729)

Metal working

Method of mechanical manufacture

Assembling or joining

C029S282000, C029S522100, C285S382400

Reexamination Certificate

active

08056208

ABSTRACT:
A method for joining flanges or other couplings to pipes, wherein a plurality of radially expanding segments (10) with circular ridges (11) on a tool inserted into the pipe (1), press beads (5, 6) in the pipe wall into corresponding grooves (3, 4) in the surrounding coupling element (2), where the pipe end, by means of a projection on the segments, is given an overbending outwards that prevents the pipe end from tapering inwards during the pressing of the beads. The invention comprises the interior configuration of the coupling element as well as a tool for pressing the beads.

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