Automatic control method for camber and wedge of hot rolled strip roughing mill

Abstract

The invention provides an automatic control method for a camber and a wedge of a hot rolled strip roughing mill, which is realized by adding an auxiliary control module in a hot rolled strip roughing mill control system. The automatic control method takes the actual values of rolling forces on two sides of an in-situ roughing mill, the actual calculated values of a gap between rolls and bounce parameters on two sides of a rack as inputs to be accurately calculated, and finally realizes the correction to the camber and the wedge through regulating the gap between rolls on one side or two sides of the rolling mill. By applying the control method, the extremely accurate control over the camber and the wedge can be realized without adding a camber shape detection device with blanks, and the control effect of the control method can be further assured if the camber shape detection device is equipped in situ.

Description

technical field [0001] The present invention relates to the automatic control technology of hot-rolled steel strip and hot-rolled plate production line, in particular to an automatic control method for the first-level dynamic intermediate billet or wedge-shape and camber bend of strip steel in the production process of strip steel. Satisfy the requirements of good plate shape for intermediate billet or strip steel. Background technique [0002] In the production process of hot-rolled strip steel, the slab is generally rough-rolled first, and the intermediate billet often bends to the horizontal direction during rough rolling, which is commonly called camber. The essential reason for the camber phenomenon of the intermediate slab is that the extension of the slab in the length direction of both sides is inconsistent. There are many reasons for the inconsistent extension, mainly including: uneven temperature on both sides of the slab; large deviation of the roll gap between t...

AI Technical Summary

Problems solved by technology

However, this type of camber automatic feedback control system also has the following disadvantages: one is the dependence on the detection device, and when the detection device detects the camber, the intermediate billet has been rolled for a long period of time, and at this time the camber has been corrected. Not the best timing, that is, the adjustment of the camber is not timely enough; second, it is difficult for the controller of this type of system to calculate the corresponding roll gap adjustment amount according to the degree of camber, so when the control result is abnormal, it is impossible to analyze and find the reason afterwards. Especially in the case of operator intervention; third, the control logic of this type of system does not essentially analyze the control output, and these control results cannot be further counted and inherited to the next slab, nor can it be analyzed to determine the camber. Fourth, this type of control system needs to identify and select detection devices, while general high-precision detection devices are expensive, occupy a large area, require high installation and commissioning, and are difficult to maintain. Influence of other on-site environment

Images