Micro-rolling method for extra-thin variable-thickness strip

Abstract

The invention discloses a micro-rolling method for an extra-thin variable-thickness strip, and the micro-rolling method solves the problems that operations in the prior art are complex, the needed thickness can be reached by needing multi-pass rolling and the production efficiency is low. The method comprises the following steps of: firstly, determining a deformation-thickness ratio as H2 / H3, thereby determining a roll gap Hgap; in case of determining rolling speed V, setting an initial rolling roll gap as H2, length of a to-be-rolled thick region as S1 and length of a to-be-rolled thin region as S2; selecting a rolling direction and a rolling control way, opening the roll gap, putting a to-be-rolled strip onto a roll, closing the roll gap, pressing the roll by initial pressure of closing the roll gap, and clamping and pressing the head part of the strip; and enabling a rolling mill to start operation and rolling according to set roll gap amount. The micro-rolling method disclosed by the invention can realize variable-thickness micro rolling on the extra-thin strip, precisely controls thickness of a thin region and a thick region as well as length of a transition region, and completes regulation on the roll gap through automatic control; and single-pass pressing amount is increased by a hydraulic type pressing system, so that once forming of a variable-thickness rolled piece is realized.

Description

technical field [0001] The invention belongs to the technical field of strip rolling, and in particular relates to a micro-rolling method for ultra-thin variable-thickness strips with high production efficiency, precise strip thickness variation, simple operation and good controllability. Background technique [0002] With the rapid development of science and technology, electronic consumer products are also constantly developing in the direction of multi-function, miniaturization, light weight, high density and high reliability. The trend of continuous miniaturization of electronic products has sharply increased the demand for thin and ultra-thin strip parts, resulting in higher requirements for the processing size of parts in the market. [0003] The research on variable thickness strip rolling at home and abroad mainly focuses on the differential thickness plate with a thickness of 0.5-3mm, which is used in the automotive industry, and the LP plate with a thickness of 10-...

AI Technical Summary

Problems solved by technology

[0005] At present, the synchronous rolling and asynchronous rolling of ordinary strips, and the variable thickness rolling methods of thick and medium plates have been developed relatively maturely; however, the research on the rolling of extremely thin variable thickness strips is still relatively limited. few

Most of the existing two-roll and four-roll rolling mills have large roll diameters and complex operations, requiring multiple passes of rolling to achieve the required thickness; and the change of thickness cannot be realized, and the production efficiency is very low

Since the current production equipment and rolling methods cannot meet the market demand for variable-thickness ultra-thin strips, it is necessary to improve the existing ultra-thin variable-thickness strip rolling methods

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