Apparatus for making butt-welded tubes

Details Apparatus for making butt-welded tubes Apparatus for making butt-welded tubes

1976-03-25

1977-05-24

Goldberg, E. A.

Electric heating

Metal heating

For bonding with pressure

29125, 219 59, 219119, 228 175, B23K 1106

Patent

active

040257495

ABSTRACT:
Apparatus for making butt-welded tube from a strip includes a pair of grooved weld rolls for aligning the longitudinal edges of the strip bent into a tubular shape. To insure that the inside seam of the tube is flush regardless of variations in thickness between strip edges, each roll is made in two sections. In a horizontal mill the seam is on top and each bottom roll section is fixed in horizontal position while the top roll section has limited axial movement. Resilient means bias the roll sections apart and against a top stop so that the top of one edge of the strip is higher than the other when the edges are of different thicknesses. If desired, the rolls may also be adjusted to insure that the outside seam of the tube is flush.

REFERENCES:
patent: 1585596 (1926-04-01), Smith
patent: 1884465 (1932-10-01), Windsor
patent: 3154037 (1964-10-01), Marath
patent: 3596453 (1953-04-01), Weidel

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