Controlling method for scrap steel reeling caused by head part offset at finish rolling exit

Abstract

A control method for coiling steel scrap caused by the deviation of the exit head of finishing rolling, comprising the following steps: (1), after the strip steel is rolled out from the stand of the finishing rolling mill, after the flatness detection equipment detects the shape of the strip, it is sent into the Coiling position; (2), according to the detection data in the step (1), determine the offset degree of the finishing head; (3), determine whether to issue an opening adjustment command according to the numerical value of the offset degree in the step (2); (4 ), set the opening of the side guide plate to the specified value according to the issued opening adjustment command. The control method not only improves work efficiency and reduces manual intervention; it also avoids wrong intervention and reduces human errors; and effectively reduces accidents of coiling scrap steel.

Description

Technical field [0001] The invention relates to a finishing rolling mill, a coiling machine, a head straightness detection and an automatic control system, in particular to a control technology applied to coiling scrap steel caused by the deviation of the finishing rolling outlet head. Background technique [0002] For the coil biting requirements of hot rolled strip in the prior art, please refer to the attached figure 1 As the final forming equipment of the entire main rolling line, the coiler's success rate of steel biting is directly related to the stable operation of the rolling line. The probability of coiler biting is largely dependent on the finished strip 1 Whether the shape of the head is in good condition, and when the strip specification changes greatly during the finishing rolling process, the flatness of the finishing exit will inevitably shift. In the past, the finishing operator always informs the coiling operator through the walkie-talkie, and the coiling operato...

AI Technical Summary

Problems solved by technology

At the same time, the offset will also cause folds and towers in the roll shape after coiling, which seriously affects the user's use. The defective part must be cut off in the finishing process, which will also cause quality cost loss.

[0006] c. Unsuccessful coiling and biting is more common, among which the coiling cannot be normally bitten due to the offset of the exit plate shape of the finish rolling accounted for a large proportion

[0007] When changing the specifications of finish rolling, due to the large jumps in width, temperature and hardness, the setting value of PFC (automatic control system for hot-rolled steel plate crown) is not in place, and the limitation of planning arrangement leads to the deviation of the exit head of finish rolling. The situation of shifting is unavoidable. After coiling, the irregular head plate shape collides with the coiling side guide plate and then folds, which makes it difficult for the coiler to bite into the scrap steel

[0008] Generally speaking, the greater the plate shape offset at the finish rolling exit, the more serious the scrape with the side guide plate of the coiler, the easier it is to fold the head, and the more difficult it is for the coiler to bite

For a long time, in the prior art, the coiling bite of hot-rolled strip steel is mainly improved by controlling the shape of the finish rolling outlet, the position control of the coiling side guide plate, and the coiling tension control, etc., but the improvement range is limited, and it is difficult to effectively avoid and alleviate this problem. defect

[0009] Therefore, in the existing technology, the coiling area cannot predict the shape offset information of the incoming material head, and it is impossible to control the coiling side guide plate according to the exit offset of the finish rolling. Communicate relevant information so that the following questions exist:

[0010] 1. Due to the delay in information transmission and the hysteresis of manual intervention, it is often too late for the guide to move;

[0011] 2. Information transmission errors and manual intervention errors lead to inaccurate guide plate movements, and even excessive intervention leads to negative effects;

[0012] 3. Differences in operational skills lead to differences in team and individual control, resulting in quality fluctuations

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