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An effective method to solve the problem of coil indentation in hot-rolled coil

A hot-rolled coil and indentation technology, applied in tension/pressure control, rolling force/roll gap control, tail end control, etc., can solve problems such as insufficient indentation analysis, error correction tracking, and rigid control methods. , to achieve the effect of eliminating indentation defects, preventing error correction, and avoiding steel stacking accidents

Active Publication Date: 2022-07-26
BAOTOU IRON & STEEL GRP
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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

Method used

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  • An effective method to solve the problem of coil indentation in hot-rolled coil
  • An effective method to solve the problem of coil indentation in hot-rolled coil
  • An effective method to solve the problem of coil indentation in hot-rolled coil

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Embodiment Construction

[0034] like Figures 1 to 5 As shown, an effective method to solve the problem of coil indentation in hot-rolled coil

[0035] S1. Strip head tracking data correction

[0036] S1.1 Pinch Roller (PR) Tracking Correction: Before the strip head leaves the finishing mill and is about to enter the coiler, it first passes through the Hot Metal Detector (HMD) to trigger the preparation signal; then passes through the Cold Metal Detector (CMD), Trigger the head tracking calculation; the strip head passes through the pinch roller, and the pinch roller passes the force value feedback to trigger the loading signal, and the tracking data is corrected in time according to the formula SPR′=SPR﹣△, where SPR is the instantaneous tracking value before correction, SPR' is the corrected instantaneous tracking value, △=SPR﹣2640mm, the measured distance from the bottom of the cold metal detector to the lower pinch roller is 2640mm.

[0037]S1.2 Tracking correction of the first circle of the help...

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Abstract

The invention discloses an effective method for solving the indentation problem of hot-rolled coiling, and relates to a method specially suitable for the control technology of a metallurgical hot-rolled strip coiler. The control process in the process improves the control accuracy of the strip head from four aspects: correcting the tracking calculation, compensating the pressing force of the helper roller, compensating the jump value of the helper roller, and compensating the delay of the critical point of the position control and shear force control. The correction tracking includes two parts: load correction with protection range and forward slip compensation correction, so that the pressure control timing deviation at the head of the strip is greatly reduced, the pressure impact is significantly reduced, and the occurrence of stacking accidents is effectively avoided. The problem that the existing control scheme cannot completely eliminate the head indentation is solved.

Description

technical field [0001] The invention relates to the technical field of metallurgical hot-rolled strip coiler control, in particular to an effective method for solving the indentation problem of hot-rolled coils. Background technique [0002] The main products of the 2250mm hot-rolled metal manufacturing company are high-quality rare earth hot-rolled coils, and the featured products are high-strength steels such as pipeline steels. The tensile strength of high-strength steel can reach up to 1200MPa, and the highest grade of pipeline steel is X100. The product is positioned as a high-value-added high-quality sheet, 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 a large-scale transportation project such as the West-East Gas Pipeline. Main materials for construction. [0003] With the large-scale appli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/72B21B37/58B21B37/48
CPCB21B37/72B21B37/58B21B37/48
Inventor 刘淑鹏刘宪超赵建李震周学刚丁黎王春生韩明亮于洋齐鑫王博
Owner BAOTOU IRON & STEEL GRP
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