Method for optimizing rolling scope of hot strip rolling

Abstract

The invention discloses a method for optimizing the rolling scope of hot strip rolling. The method comprises the following step: setting initial parameters; selecting the width node value and initial thickness value of a rolled piece; generating an initial rolling schedule of the rolled piece according to the width node value and initial thickness value of the rolled piece; judging whether rolling constraint conditions are satisfied or not; reducing the thickness of the rolled piece according to the thickness variable step size of the rolled piece; recording and outputting the last computed minimum thickness value of the rolled piece, i.e. the corresponding minimum thickness value of the width node; and calculating the next width node value. The method aims at relative equal load and good sheet shape, takes finish rolling temperature, allowable rolling force and allowable power as inequality constraints, utilizes pressing distribution as equality constraint to optimize a pressing schedule, accordingly, the minimum rolling thickness is searched, the optimum formulation of a rolling technology is realized at the same time, the equipment capability can be utilized more effectively, the yield of a rolling machine and the product quality are improved, and the rolling energy consumption and production cost are reduced.

Description

technical field [0001] The invention belongs to the off-line simulation field of strip hot rolling, in particular to a rolling range optimization method of strip hot rolling. Background technique [0002] The research on the rollable range of strip hot rolling products is to determine the limit specifications of the rolled steel types. The limit specification is the embodiment of the production capacity of the rolling line. The accuracy of its calculation model not only plays an important role in the design of the rolling line and the control of the production process, but also can expand the range of product specifications of the existing rolling line and give full play to the capacity of the rolling mill. [0003] In the production of cold-rolled strip steel, due to the small thickness of the finished product, the deformation of the work roll has a great influence on the thickness of the strip steel, that is, the interaction between the roll pressure and the roll surface b...

AI Technical Summary

Problems solved by technology

The rollable range of the existing strip hot rolling will remain unchanged once it is determined, but the rollable range is limited by the actual rolling steel type and rolling parameters, and there is a certain error, so that the rolling capacity of the rolling mill cannot be effectively utilized. High energy consumption and high production cost for rolling

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