Method and apparatus for forming bends in a tube

Details Method and apparatus for forming bends in a tube Method and apparatus for forming bends in a tube

1990-12-13

1991-11-05

Jones, David

Metal deforming

By relatively movable offset tool-faces

Embodying three or more coacting relatively movable tools

72384, B21D 1107

Patent

active

050622889

ABSTRACT:
A method and apparatus is provided for forming bends in a tube. A set of bend forming elements are mounted on each of a pair of parallel guideways. Each set of bend forming elements are interconnected by lazy tongs and a motor is provided to drive each set of bend forming elements along the guideways so that each set of bend forming elements may be moved together or separated while maintaining equal spacing between the elements. When a straight tube is placed between the sets of bend forming elements and the bend forming elements are driven together while the guideways simultaneously are driven apart, bends are formed in the tube to form the tube into a serpentine configuration. The bend forming elements have at least two different curvatures on their external surfaces so that the bends in the tube are formed in two stages with each of the different curvatures being sequentially operative to form the final bends in the tube.

REFERENCES:
patent: 3722254 (1973-03-01), Katogir
patent: 4753098 (1988-06-01), Roehm et al.

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