Method for the cold rolling of metallic rolled stock

Abstract

The invention is based on a known method for the cold rolling of metallic rolled stock (4) , which for plastic deformation enters a roll gap (3) formed between oppositely rotating rolls (1, 2) on a run-in side and leaves the roll gap on a run-out side, deformation heat that is produced being removed by supplying an industrial gas which is at a lower temperature than the rolled stock. In order on this basis to provide a cold rolling method with which, on the one hand, corrosion of the surfaces of the rolled stock and the surfaces of the rolls in the region of the roll .gap is effectively prevented and with which, on the other hand, condensation of moisture on the rolls and a reduction of the oxygen content of the ambient air of relevance to health as a result of the supply of large amounts of inert gas are avoided, it is proposed according to the invention that a measured value for the surface temperature of at least one of the rolls is determined, and that the supply of industrial gas is set on the basis of the measured value.

Description

technical field [0001] The invention relates to a method for the cold rolling of metal rolled stock, which enters a nip formed between counter-rotating rollers on the input side for plastic deformation and leaves this nip on the output side by supplying a temperature The industrial gas below the rolled material removes the generated heat of deformation. Background technique [0002] In the cold rolling process, billets—for example in the form of strips, sections or plates, non-ferrous metals, aluminum or other metals—are continuously fed into a rolling stand and cold-formed there. Contrary to thermoforming, the rolled material is not heated before being plastically deformed. [0003] The change in shape of the metal below the corresponding recrystallization temperature results in beneficial property changes such as increased strength and hardness. However, the deformations introduced into the rolling stock can lead to internal frictional effects and thus generate heat whic...

AI Technical Summary

Problems solved by technology

However, the proposed method of cooling the surface of the rolled material may cause moisture condensation and cause corrosion when the rolled material leaves the inert gas environment, and on the other hand, the oxygen content in the ambient air decreases due to the supply of a large amount of inert gas, which May cause health problems for personnel working near rolling mill stands

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