Method for preventing great under-pressure distribution change in steel rolling process

Abstract

The invention relates to a rolling method of medium-thick plates and wide and thick plates, in particular to a method for preventing great under-pressure distribution change in a steel rolling process. Through the memory on the preset under-pressure distribution, the rereading of the under-pressure distribution among passes in the rolling process is realized, the rolling force of each pass after the correction is combined, and the re-correction of a roller seam of each pass is realized. The method has the advantages that the serious change of the under-pressure distribution in the rolling process can be effectively avoided, the stability of the rolling process can be favorably realized, the problems of improper performance, ultralimit dimension, plate shapes and the like due to serious oscillation of the under-pressure distribution are avoided, and the unplanned rate and the equipment damage rate are reduced.

Description

technical field [0001] The invention relates to a rolling method for a medium-thick plate and a wide-thick plate, in particular to a method for avoiding large changes in reduction and distribution in the rolling process. Background technique [0002] In the rolling process of medium and heavy plates and wide and heavy plates, reasonable reduction distribution will directly affect the performance of finished products. Unreasonable reduction distribution, for example, if the reduction amount in the rough rolling stage is too small, it may affect the crushing of grains and directly cause the performance of the finished product to be unsuitable. In the finishing rolling stage, especially if the reduction in the last few passes is too small or too large, it will directly affect the shape of the plate, cause the product to be warped or be rejected, and even cause the head to hit the equipment, resulting in a large number of downtime and even equipment failure. damage. Therefore,...

AI Technical Summary

Problems solved by technology

However, in order to ensure the target thickness hit rate of the product, in the production process, the secondary computer system usually needs to dynamically recalculate the rules, and the recalculation is usually completed by recirculating and iterative calculations, and the calculated reduction allocation scheme is often consistent with The original plan is completely different. When the difference is large, it will cause problems in the shape and even quality of the product

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