A method for rolling ultra-thin foil with pulse current assisted multi-roll mill

Abstract

The invention belongs to the technical field of ultra-thin strip rolling, and specifically relates to a method of applying pulse current in the process of rolling ultra-thin foil by a multi-roll mill, so as to obtain thinner thickness, higher dimensional accuracy, more stable performance, and crystal grain A method for foils of smaller dimensions. It mainly includes multi-roll mills, brushes and pulse power supplies. The upper and lower work rolls of the multi-roll rolling mill are Sialon ceramic rolls, which can solve the insulation problem of rolling mill equipment, avoid heat energy generated when pulse current passes through the rolls, reduce wear of the rolls, and save electric energy. The pulse current output by the pulse power supply forms a closed loop through the brush and the ultra-thin strip to realize electroplastic rolling. By adding pulse current in the multi-roll rolling process of ultra-thin strips, the plastic deformation ability of ultra-thin strips is improved, crack propagation is suppressed, ultra-thin strips with bright surfaces are rolled, production efficiency is improved, and thickness is thinner and dimensional accuracy is higher. , more stable performance, finer grain size of the ultra-thin strip.

Description

technical field [0001] The invention belongs to the technical field of ultra-thin foil rolling, and in particular relates to a method of applying pulse current in the process of rolling ultra-thin foil by a multi-roller mill, so as to obtain thinner thickness, higher dimensional accuracy, more stable performance, and better crystallinity. The method of foil with finer grain size. Background technique [0002] In the process of ultra-thin foil strip rolling, when the thickness of the rolling stock is reduced to a certain extent, the thickness of the rolling stock does not decrease significantly even if the rolling force is continued to increase, and the minimum rollable thickness is reached at this time. In order to obtain ultra-thin foil strips with smaller thickness, multi-roll mills with smaller work roll diameters are usually used for rolling. The experimental study on the minimum rollable thickness shows that when the ultra-thin foil strip reaches the minimum rollable t...

AI Technical Summary

Problems solved by technology

There are two reasons why it is difficult to apply to multi-roll mills: on the one hand, the insulation of rolling mill equipment is relatively difficult, and it is difficult to achieve insulation in multi-roll mills; It has a great influence on the stiffness and service life of the multi-roll mill, and it will lead to increased wear of the multi-roll mill

The multi-roll mill is mainly used to produce precision strip steel, and the quality of precision strip steel has very strict requirements on the roll shape, which will inevitably increase the frequency of roll changing and repairing, and increase production costs

[0004] It has not been found that electroplastic rolling technology is applied to the process of rolling ultra-thin foil in multi-roll mills

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