Method for milling thin plate by four-high reversing cold mill

Abstract

The invention relates to a method for milling a thin plate by a four-high reversing cold mill, which belongs to the technical field of cold-milling hard rolling plates. The method comprises the steps: pickling raw materials of a hot-milling rolling plate and coldly milling a pickled hot-milling rolling plate, wherein the milling steps comprise a first milling step and a second milling step; a milling plate which is obtained from the first milling step is annealed after the first milling step and is milled after being annealed so as to obtain a thin plate with the thickness of 0.18 mm to 0.23 mm, and the pickled hot-milling rolling plate with the thickness of 3 mm to 4 mm is milled into a milling plate with the thickness of 1 mm in the first milling step. The method for milling a thin plate by a four-high reversing cold mill can change the ultimate milling thickness of 0.23 mm into the ultimate milling thickness of 0.18 mm to 0.23 mm in the prior art.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled hard coils, and in particular relates to a method for rolling thin plates by a reversible four-roller cold rolling mill. Background technique [0002] The single-stand reversible four-high cold rolling mill in the prior art (reversible four-roll cold rolling mill for short in the industry and also called four-roll reversible cold rolling mill) cold-rolls the hard coil operation as follows: firstly, the thickness is 3-4mm Hot-rolled coils are pickled and then cold-rolled in multiple passes (usually 5 or 6 or 7 passes) to obtain thin sheets with a thickness of 0.3-0.8 mm. Rolling the thickness of 3-4mm by the reversible four-roll cold rolling mill to a thin plate with a thickness of 0.3-0.8mm, the total reduction rate is 80-90% of the plate itself, the maximum is 90%, it is difficult or even impossible to break through 90% total reduction. Considering from a simple way of thinking, increasing ...

AI Technical Summary

Problems solved by technology

However, due to the inability of many small and medium-sized enterprises in my country to own multi-roll mills in large steel mills and most of them have single-stand reversing four-roll cold rolling mills with a width of 1450mm, they cannot process thin plates with a width of <0.23mm unless they purchase six The cold rolling mill with six or more rollers, but because the price of this kind of cold rolling mill is beyond the economic capacity of ordinary small and medium-sized enterprises, it also has very high technical requirements

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