Effective method for solving problem of hot rolling coiling indentations

Abstract

The invention discloses an effective method for solving the problem of hot rolling coiling indentations, and relates to a method special for a control technology of a metallurgical hot rolling strip steel coiling machine. The control precision of the head of strip steel is improved from the four aspects of correction tracking calculation, wrapper roller pressing force compensation, wrapper rollerbounce-off value compensation and position control-force control switch critical point delay compensation, and correction tracking comprises load correction and forward slip compensation correction within a protection range, so that the pressure control time sequence deviation borne by the head of the strip steel is greatly reduced, the pressure impact is obviously reduced, steel stacking accidents are effectively avoided, and the problem that head indentations cannot be thoroughly eliminated in an existing control scheme is solved.

Description

technical field [0001] The invention relates to the technical field of metallurgical hot-rolled steel strip coiler control, in particular to an effective method for solving the problem of indentation in hot-rolled coils. Background technique [0002] The leading product of the 2250mm hot-rolled metal manufacturing company is high-quality rare earth hot-rolled coil, and the featured products are high-strength steel such as pipeline steel. The highest tensile strength of high-strength steel can reach 1200MPa, and the highest grade of pipeline steel is X100. The product is positioned as a high-value-added high-quality plate, which is widely used in ships, automobiles, bridge construction, machinery manufacturing, pressure vessels, petrochemical equipment, power equipment, pipeline transportation and other industries, especially pipeline steel is used in large-scale transportation projects such as the West-East Gas Transmission Project. The main material of construction. [00...

AI Technical Summary

Problems solved by technology

The disadvantage is that this solution shortens the time for the coiling-assisting roller to pressurize the outer surface of the strip, and also weakens the pressing function of the coiling-assisting roller for assisting coiling. At the same time, it does not take into account the impact problem caused by inaccurate tracking of the strip head , the analysis of the reasons for eliminating the indentation is not deep enough, and the indentation cannot be eliminated fundamentally

The disadvantage is that this method of using compensation correction does not take into account that in actual production, the force feedback signal sometimes fluctuates due to unexpected shocks, resulting in error correction tracking

The disadvantage is that the setting of the jump-off value of the winding-assisting roll is completely dependent on calling the static parameter table, which does not take into account the actual production, which is affected by the accuracy of the equipment, the yield strength of the strip, and the material properties, resulting in a large deviation from the feedback, and the control method is rigid. no closed loop

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