Method for forming electric welded pipe

Details Method for forming electric welded pipe Method for forming electric welded pipe

1982-05-28

1984-07-17

Combs, E. Michael

Metal fusion bonding

Process

With shaping

72 51, 72181, 228151, B23K 3106, B21D 512, B21D 3903

Patent

active

044601182

ABSTRACT:
In a method for roll forming a flat metal strip through a roll forming machine into a round tubular product while the metal strip is being lengthwise fed therethrough, an improved method wherein regions of a specified width extending inward from the edges of said strip are imparted with substantially zero curvature. The tube forming method prevents decrease in the wall thicknesses at the edges when used in the manufacture of a thick walled electric welded pipe, and prevents the occurrence of edge buckling and springback when used in the manufacture of thick walled pipe so that in either case a proper and satisfactory butt junction for subsequent welding can be obtained.

REFERENCES:
patent: 330338 (1885-11-01), Lippincott
patent: 1816534 (1931-07-01), Hume
patent: 2025922 (1935-12-01), Weinrich
patent: 4148426 (1979-04-01), Midzutani et al.
patent: 4294095 (1981-10-01), Kawano et al.
patent: 4373365 (1983-02-01), Taira et al.

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