Plate type control method adopted in process of producing aluminum alloy plate through cold rolling method

Abstract

The invention discloses a plate type control method adopted in the process of producing an aluminum alloy plate through a cold rolling method. According to the type of a machined aluminum alloy, the middle target value and the middle spraying quantity of a cold rolling machine are firstly given, and then in the coiling process, along with decrease of the uncoiling diameter, the roll bending forceof the cold rolling machine is reduced step by step, and the given value of the middle spraying quantity is increased. In the method, according to constant changing of the uncoiling diameter, the rollbending force and the spraying given value are changed, specifically, in the operation process, along with constant decrease of the uncoiling diameter, the positive bow given value of a work roll isreduced synchronously, meanwhile, the middle spraying quantity is increased, the degree of camber of a strip is reduced by reducing the given value of the roll bending force, and force borne by the strip is reduced; and meanwhile, temperature increase of the middle of the work roll is reduced by increasing the spraying quantity of the middle of the strip, the influence of increase of the degree ofcamber of the work roll on the plate type of the strip is reduced, and therefore consistency of plate types of a whole coil of the aluminum alloy strip is guaranteed.

Description

technical field [0001] The invention relates to the field of aluminum alloy processing technology, in particular to a method for controlling the shape of an aluminum alloy sheet produced by a cold rolling method. Background technique [0002] Both the theory and practice of cold rolling show that the tension has a relatively large influence on the flatness of the strip when cold rolling or flattening the strip. Tension changes mainly affect the strip shape by changing the distribution of tension along the width of the strip on the metal flow in the rolling deformation zone. When the tension is small, the strip is prone to edge waves, and when the tension is large, the strip is prone to edge waves. When the strip with lower tension has side waves, as the tension increases, the side waves gradually decrease until they disappear, and the middle waves gradually increase. [0003] In the existing cold-rolling or skin-pass shape control technology, the commonly used shape contro...

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Problems solved by technology

[0012] In order to solve the problem in the prior art that the detection result of the shape roll is inaccurate and the shape of the product is unstable due to the close distance between the crimping part of the cold rolling mill and the shape roll, the invention provides a cold rolling This method is used to control the shape of the aluminum alloy sheet by changing the parameters such as bending force and spray setting value according to the change of the uncoiling diameter during the shape control, so as to keep the shape of the whole coil consistent.