Method and apparatus for making welded tapered tubes

Details Method and apparatus for making welded tapered tubes Method and apparatus for making welded tapered tubes

1988-12-21

1990-11-20

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

219613, B21C 3704

Patent

active

049712390

ABSTRACT:
A welded tapered tube is made by deforming a flat, elongated trapezoidal sheet of metal into an elongated, U-shaped trough in a wagon open at its top and having a U-shaped trough for a bottom. The wagon moves along a track to carry the U-shaped sheet past a series of fin rolls, which deform the U-shaped sheet into an oval-shaped, tapered tube with a seam running the length of the tube. The wagon and tube thereafter move past a welding station where the seam is forged and welded together to form an elongated, tapered tube with an oval-shaped cross section, which may be squeezed between two elongated and semicircular die cavities to form a tapered tube of circular cross section.

REFERENCES:
patent: 3452424 (1969-07-01), Morris
patent: 3691337 (1972-09-01), Morris
patent: 3802329 (1974-04-01), Karmann et al.
patent: 4148426 (1979-04-01), Midzutani et al.

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