Hot demounting method for roll collar of horizontal roll of rolling mill

Abstract

The invention provides a hot demounting method for a roll collar of a horizontal roll of a rolling mill. The hot demounting method orderly comprises the steps of 1, removing rust and fatlute on the surface of the horizontal roll, 2, placing the horizontal roll vertically and keeping partial horizontal roll comprising the roll collar in a sealed space, 3, preheating the outer roll surface of the roll collar to increase the temperature to the outer roll surface of the roll collar to the range of 170 to 200 DEG C, and meanwhile, increasing the temperature of inner roll surface of the roll collar to the range of 90 to 120 DEG C, 4, heating the outer roll surface of the roll collar, the upper end face of the upper part of the roll collar and the inner roll surface of the upper part of the roll collar, so that the roll collar can be detached from a roll shaft when the expansion quantity of the roll collar exceeds the expansion quantity of the roll shaft. The hot demounting method is capable of greatly improving the working efficiency; in the hot demounting method, the satisfied temperature difference between the roll shaft and the roll collar can be well guaranteed by thoroughly utilizing the thermal expansion effect of the roll collar and the roll shaft, and consequently, the roll collar can be smoothly detached from the roll shaft.

Description

Technical field [0001] The present invention belongs to the technical field of rolling mill mechanical equipment. Specifically, the present invention relates to a method for thermally dismantling the roll ring of a horizontal roll of a rolling mill; more specifically, it relates to a method for thermally dismantling the roll ring of a composite horizontal roll of a H-beam rolling mill . Background technique [0002] The important part of the H-beam rolling mill is the roll, among which the horizontal roll is the core of the section steel forming. The new roll is formed by hot-fitting the roll ring and the roll shaft, which is an interference fit. Only the roll ring is heated during hot charging, and the roll shaft is not heated. When the inner diameter of the roll ring is large enough, the roll shaft is put into the roll ring, and after the roll ring is cooled, it forms a composite horizontal roll with the roll shaft. However, the composite horizontal roll will wear out during...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for thermally dismantling the roll ring of the horizontal roll of a rolling mill, to at least solve the technical problem that the roll ring and the roll shaft are not easy to be disassembled in the prior art, and further solve the problem of the roll ring and the roll shaft existing in the current technology. The technical problems of low efficiency of roller splitting and environmental pollution

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