Method and apparatus for expanding tubes

Details Method and apparatus for expanding tubes Method and apparatus for expanding tubes

B - Operations, Transporting

21

D

26/145

B21D 53/02 (2006.01) B21C 37/22 (2006.01) B21D 26/02 (2006.01) B21D 39/10 (2006.01)

Patent

CA 1095222

IMPROVED METHOD AND APPARATUS FOR EXPENDING TUBES Abstract of the Disclosure A method of expanding a tube into engagement with a header wherein the expander is permitted to move longitudinally a predetermined amount relative to the tube while the expander is being rotated-and expanding the tube into engagement with the header. The tube expanding apparatus includes a rotatable expander for insertion into the tube to be expanded, a stop collar that engages the header, a thrust collar that is fixed relative to the expander and a spring disposed between the stop collar and thrust collar permitting the thrust collar and expander to move relatively into the tube as the expander is rotated. .1a.

308587

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