Variable thickness rolling length control method

Abstract

Disclosed is a variable thickness rolling length control method. The variable thickness rolling length control method comprises the steps of, when variable thickness rolling is not performed, setting the count of a length measuring roller to be 0; when the variable thickness rolling is performed, starting to record the lengths of rolled strips through the length measuring roller, and enabling the length measuring roller to work as follows that the working roller presses downwards at a certain speed when the measured length reaches L1 / 2, stops downward pressing when the measured length reaches L1 / 2+T1, moves up at a certain speed when the measured length reaches L1 / 2+T1+L2, and maintains the position without moving up when the measured length reaches L1 / 2+2*T1+L2; when the measured length reaches L1+L2*T1*2, clearing the count of the length measuring roller and repeating the steps above. According to the variable thickness rolling length control method, the pressing position of the working roller is adjusted in real time according to the length measured by the length measuring roller and by referring to a set strip contour.

Description

technical field [0001] The invention relates to the field of cold rolling, in particular, the invention relates to a method for controlling the lengths of equal thickness sections and transition sections during variable thickness rolling. In this method, a length-measuring roll is placed behind the thickness gauge at the roll gap exit of the rolling mill. According to the length measured by the length-measuring roll and with reference to the set strip profile, the pressing position of the work roll is adjusted in real time. The length of each cycle is controlled to reduce the influence of accumulated errors on the length control, and then achieve the purpose of controlling the length of each section of the export. Background technique [0002] Automobile lightweight is one of the key research topics in the current global automotive industry. The variable thickness sheet has been recognized by the automotive industry for its remarkable weight reduction effect. Therefore, the ...

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Problems solved by technology

[0006] The above-mentioned patented technology tracks the length of each equal-thickness section and transition section of a variable-thickness cycle separately; instead of tracking the total length of a variable-thickness cycle (including each equal-thickness section and transition section), and The deviation between the rolled strip length and the actual length measured by the length measuring roller under tension is not considered, so the length accuracy controlled by the above method needs to be improved

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