Method of spin-welding

Details Method of spin-welding Method of spin-welding

B - Operations, Transporting

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B

18/963

B67B 5/00 (2006.01) B29C 47/00 (2006.01) B29C 57/00 (2006.01) B29C 65/00 (2006.01) B29C 65/02 (2006.01) B29C 65/06 (2006.01) B29D 23/20 (2006.01)

Patent

CA 1268610

ABSTRACT METHOD OF SPIN-WELDING An end component 3 is spin-welded into the cut end of an extruded tube 1 with the application of axial pressure but without the application of radial pressure to the weld area. The radial forces required to create a weld are provided by hoop stresses which are formed in the tube by shock-cooling the tube as it emerges from the extrusion die. When the tube is cut, the hoop stresses cause the cut end of the tube to contract radially prior to insertion of the end component. To assist in insertion of the end component, a cylindrical skirt thereof 4 is provided with a chamfered end 9.

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