Metal deforming – By deflecting successively-presented portions of work during... – By use of deflector arranged to bend work transversely of...
Patent
1982-01-25
1984-11-20
Crane, Daniel C.
Metal deforming
By deflecting successively-presented portions of work during...
By use of deflector arranged to bend work transversely of...
72182, 72 52, 228147, B21D 514, B21B 2702, B21H 802
Patent
active
044831676
ABSTRACT:
A complementary pair of top and bottom rolls for the initial breakdown step of a skelp in the manufacture of welded tubular products by rolling. The bottom roll has a convex midportion, a pair of concave end portions, and a pair of straight border portions each lying between the midportion and one of the concave end portions. The top roll is shaped in complementary relation to the bottom roll to define therebetween a path for the skelp. The breakdown roll pair of the above configuration makes it possible to curl the opposite edge portions of the skelp into arcs of a desired radius without the usual defects of rolling, and in such a way that the skelp can be subsequently rounded and have its edges welded together into a tube of minimal out-of-roundness.
REFERENCES:
patent: 12268 (1855-01-01), Booth
patent: 726691 (1903-04-01), Johnson
patent: 845437 (1907-02-01), Schmeltzer
patent: 1510704 (1924-10-01), Rendleman
patent: 1936228 (1933-11-01), Crafton
patent: 2343126 (1944-02-01), Matlat
patent: 3344641 (1967-10-01), Pomory
patent: 4030330 (1977-06-01), Nyssen et al.
Crane Daniel C.
Kabushiki Kaisha Sanyo Seiki
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