A Calculation Method for Predicting the Temperature Field of Cold-rolled Strip Steel

Abstract

The invention relates to the field of rolling process control and particularly relates to a computing method for predicting the temperature field of a cold-roll strip steel. The computing method is characterized in that inlet temperature of the strip steel, deformation heat and heat conduction factor are introduced into a predictive model of the temperature field of a cold-roll strip steel, deformation heat and friction heat in a roll gap can be calculated by using numerical integration, and the surface temperature of the steel strip in the roll gap is as formula 1. Compared with the prior art, the computing method provided by the invention has the benefits as follows: (1), with the consideration of the variation of contact arc in a plate length direction, a computing model for friction heat of a roller and a steel strip during the cold rolling process and the plastic deformation heat of the steel strip inside the roll gap is built, a numerical integration method is adopted for computing the friction heat and the deformation heat during the cold rolling process, so as to obtain very high temperature prediction accuracy and the detailed information of plate and belt temperature distribution during the enter rolling process, and set and optimized parameters for the rolling process are provided; and (2), since a numerical integration is adopted, computer control is very suitable for being introduced, the computing efficiency is improved, and the applicability is strong.

Description

technical field [0001] The invention relates to the field of rolling process control, in particular to a calculation method for predicting the temperature field of cold-rolled strip steel. Background technique [0002] During the rolling process, due to the frictional heat in the rolling zone and the deformation heat of the strip during the deformation stage, the temperature of the strip will increase, and the deformation heat itself is affected by the strain and strain rate of the strip and the temperature conduction. On the one hand, this temperature increase will cause the strip steel material to soften, and on the other hand, it will also affect the strip shape quality. [0003] At present, in the rolling process control, although the calculation of the thermal deformation of the strip has made some progress, there has been no suitable solution for the calculation of the deformation heat and friction heat in the roll gap. During the cold rolling process, the deformation...

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Problems solved by technology

[0002] During the rolling process, due to the frictional heat in the rolling zone and the deformation heat of the strip during the deformation stage, the temperature of the strip will increase, and the deformation heat itself is affected by the strain and strain rate of the strip and the temperature conduction. On the one hand, this temperature increase will cause the strip material to soften, and on the other hand, it will also affect the shape quality of the strip.

[0003] At present, in the rolling process control, although the calculation of the thermal deformation of the strip has made some progress, there has been no suitable solution for the calculation of the deformation heat and friction heat in the roll gap.

During the cold rolling process, the deformation heat and friction heat in the roll gap are the two main factors that cause the temperature rise of the strip, and are the prerequisites for solving the temperature field of the strip steel. At present, due to the inaccurate calculation of the deformation heat and friction heat in the roll gap, the cold rolling The calculation accuracy of the strip temperature field is limited

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