Machine for manufacture of spiral tubing with folded seam

Details Machine for manufacture of spiral tubing with folded seam Machine for manufacture of spiral tubing with folded seam

1979-06-13

1981-08-25

Larson, Lowell A.

Metal deforming

With use of self regulating control system utilizing...

72 49, 72181, B21D 512

Patent

active

042852226

ABSTRACT:
A machine for the manufacture of helically seamed tubing, including a number of preshaping roller pairs for a strip material and a folding roller pair, arranged to form a folded seam in the strip material while feeding it to a coiling and tube shaping tool, each roller pair being driven by a separate hydraulic motor arranged to drive one of the rollers, the second roller being driven by a cog wheel transmission from the first, the second roller being movable in relation to the first roller in the same roller pair and being spring loaded in the direction towards same the first. The hydraulic motors are connected to each other in series, thus driving the successive individual roller pairs with a successively reduced speed, each roller including at least one surrounding circumferential groove, into which semi-circular ring members having an outwardly extending portion, or a groove, at the outer peripheral surface, are insertable and attachable.

REFERENCES:
patent: 519182 (1894-05-01), Gould
patent: 2352675 (1944-07-01), Yoder
patent: 4070887 (1978-01-01), Hankin
patent: 4112722 (1978-09-01), Boucard

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