Method and apparatus for joining tubes

Details Method and apparatus for joining tubes Method and apparatus for joining tubes

B - Operations, Transporting

23

P

B23P 19/12 (2006.01) B25B 27/00 (2006.01) F16L 13/16 (2006.01)

Patent

CA 2462357

A method and apparatus for joining a first tubular member having an end with a first diameter is interlocked with a second tubular member having an end with a second diameter that is larger than the first diameter. The tubes are positioned in overlapping relation, and the joint edge of the larger-diameter tube is curled inwardly while the joint edge of the smaller-diameter tube is curled outwardly so that the joint edges interlock. In the preferred embodiment, the invention forms a bead about the smaller-diameter tube by retracting a spacer ring at the end of the compression stroke, and clinches the curled edge of the larger-diameter tube between the bead and the curled edge of the smaller-diameter tube.

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