Method and apparatus for expanding tubes

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

1977-09-13

1979-01-16

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

Tool orbiting or rotating about an axis

72125, 291574, B21D 3910

Patent

active

041342860

ABSTRACT:
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.

REFERENCES:
patent: 2355852 (1944-08-01), Fisher
patent: 3449812 (1969-06-01), Hauschke et al.

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