Straightening apparatus for steel pipes and the like

Details Straightening apparatus for steel pipes and the like Straightening apparatus for steel pipes and the like

1981-08-11

1983-09-27

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72 99, B21D 304

Patent

active

044061412

ABSTRACT:
An apparatus for straightening the bend in steel pipes, round bars and the like (hereinafter simply referred to as steel pipes). The apparatus includes a first straightener comprising a combination of concave rolls and a second straightener comprising a combination of a concave roll and a convex roll and arranged at least at the entry side or the exit side of the first straightener and the top rolls or the bottom rolls of the first and second straighteners are adapted to be moved vertically, whereby when one or the other of the first and second straighteners presses a steel pipe, the pressure application of the other straightener is released so that the bend extending practically over the entire length of the steel pipe is straightened and the bend in the end portions of the steel pipe is straightened by the second straightener, thus straightening the steel pipe in a short period of time with a high degree of accuracy.

REFERENCES:
patent: 4057988 (1977-11-01), Tsukamoto

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