Method for channel steel high-temperature straightening

Abstract

The invention provides a method for channel steel high-temperature straightening. The method comprises the following steps that (1), a straightening hole type is designed, the waist center line of thestraightening hole type is equal to the waist center line of a finished hole type, the waist thickness of the straightening hole type is the same as that of the finished hole type, and the degree ofan included angle formed between a waist linear segment and a leg outer side is unchanged; by changing inclination of the waist linear segment, the waist deflection and the outer edge deflection of channel steel are straightened; (2),the straightening hole type is utilized for directly implementing straightening on the waist deflection and the outer edge deflection of the channel steel which is not cooled after the rolling working procedure; and (3), conventional straightening is conducted after cooling. The rolling working procedure in the method is a conventional rolling working procedure, or one rolling pass is reduced compared with the conventional rolling working procedure, finished products can be obtained through rolling of an original k2 rolling machine, and the method has the advantages that no straightening blind area exists, the energy consumption is low, and no hysteretic nature exists.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a high-temperature straightening method for channel steel. Background technique [0002] In the production process of channel steel, product straightening is one of the core issues of production control. The bending caused by hot rolling and cooling is corrected through straightening, and the pass design adopts the large inclination of the bend and the outer edge inclination produced by the butterfly pass process. Correction of degree deviation and waist deflection. [0003] The finishing rolling of Angang’s 400mm profile unit is 5 racks and two rolls horizontally. In order to reduce roll wear, improve rolling precision and reduce rolling force in channel steel pass design, a bend with large inclination or butterfly pass is adopted. System, the finishing adopts the process of cutting to length first, and then straightening. In order to prevent bending deformat...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of the existing channel steel straightening process proposed in the background technology, the present invention provides a method for channel steel straightening at high temperature, which has the advantages of no straightening blind zone, low energy consumption, and no hysteresis, and solves the above-mentioned problems. Questions raised in the background art

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