Dynamic setting method for rolling roller gap through hot rough rolling

Abstract

The invention relates to a method for dynamically setting a hot rough rolling roll gap, and belongs to the technical field of metal rolling control. The method sequentially determines the working stroke of the hydraulic cylinder and the set value range of the hydraulic pressure roll gap; calculates the set value of the hydraulic pressure roll gap for each pass of the steel coil and sets the maximum working stroke of the hydraulic cylinder as the first pass hydraulic pressure of the steel coil. The set value of the lower roll gap; calculate the set value of the roll gap under the electric pressure of each pass of the steel coil; calculate the hydraulic pressure roll gap of each pass of the next steel coil according to the actual measurement of the actual value of the hydraulic pressure of the roll gap of each pass of the steel coil Set value deviation, and calculate the set value of the hydraulically pressed roll gap for each pass of the next steel coil; judge whether the set value of the hydraulically pressed roll gap for the last pass of the next steel coil is less than the minimum value of the hydraulically pressed roll gap, according to Judgment result Repeat the above process until the last piece of steel coil. This method can reduce hydraulic cylinder wear and roll gap setting time and ensure the accuracy of roll gap adjustment in the whole process.

Description

technical field [0001] The invention relates to a method for setting rolling roll gap during hot rough rolling, which belongs to the technical field of metal rolling control. Background technique [0002] The common method of adjusting the roll gap of the rolling mill during rough rolling in the existing hot rolling mill is to use electric and hydraulic pressure to adjust the roll gap of each pass during the whole (full pass) rolling, and the roll gap adjustment is mainly by electric Press down, hydraulic press down for fine adjustment of roll gap. In this way, the total roll gap value of each pass is composed of the electric roll gap value and the hydraulic pressure roll gap value. [0003] The specific method process of the existing traditional adjustment of the roll gap of the rolling mill is: at first a fixed value of the hydraulically pressed roll gap is given (i.e. Hydraulic pressing roll gap setting value or Hydraulic cylinder extension position setting value ), a...

AI Technical Summary

Problems solved by technology

[0005] In view of the problem of failure of the middle position of the hydraulic cylinder in the existing traditional method of adjusting the roll gap of the rolling mill, and the problems of low precision and low speed in the existing method of separately adjusting the roll gap of the rolling mill by electric and hydraulic pressure

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