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Short Stroke Control Method for Front Vertical Roller of Finishing Mill in Hot Continuous Rolling Line

A technology of short-stroke control and finishing mill, which is applied in the direction of rolling force/roll gap control, etc. It can solve problems such as rolling waste accidents, damage equipment, and steel clamping at the vertical roll of finishing rolling, so as to reduce rolling waste and adjustment time Shorten and avoid the effect of vertical roller clamping steel

Inactive Publication Date: 2016-09-21
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current control system, the setting value of the short stroke of the front vertical roll of the finishing mill has always been a fixed value. The overall centering level of the flatness of the finishing mill, but in some special production cases, such as the first stand F of the finishing mill 1 Empty over production, in F 1 After the steel bite signal appears on the rack, if the finishing vertical roll normally performs the previous short-stroke action, at this time the vertical rolls on both sides are only about 2.5mm away from the edge of the strip. Large, or there is a problem of super-wide head, because the first stand of the finishing rolling unit is too empty and does not bear the reduction, without the traction of the finishing stand, it is easy to cause the phenomenon of steel clamping at the vertical roll of the finishing rolling , causing the strip to move forward and being blocked by the vertical roll, causing rolling waste accidents and damaging equipment in severe cases

Method used

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  • Short Stroke Control Method for Front Vertical Roller of Finishing Mill in Hot Continuous Rolling Line
  • Short Stroke Control Method for Front Vertical Roller of Finishing Mill in Hot Continuous Rolling Line
  • Short Stroke Control Method for Front Vertical Roller of Finishing Mill in Hot Continuous Rolling Line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] S1: Set target strip width H, waiting margin RD and short stroke margin SS;

[0038] S2: Adjust the front vertical roller of the finishing mill to reach the waiting position. The specific process is: use the sensor to measure the distance in real time, and the two front vertical rollers of the finishing mill will move synchronously, and adjust the distance between any one of the front vertical rollers of the finishing mill and the target strip. is RD / 2, such as image 3 shown;

[0039] S3: Adjust the front vertical rolls of the finishing mill to reach the rolling position. The specific realization process is: two front vertical rolls of the finishing mill move inward synchronously (RD-SS) / 2.

[0040] The advantage of this method is that the distance between the waiting positions is relatively large, the accuracy of distance measurement is relatively low, and it is relatively easy to adjust.

Embodiment 2

[0042] S1: Set target strip width H, waiting margin RD and short stroke margin SS;

[0043] S2: Adjust the front vertical roll of the finishing mill to reach the waiting position. The specific realization process is: adjust the distance between the two front vertical rolls of the finishing mill to be H+RD;

[0044] S3: Adjust the front vertical roll of the finishing mill to reach the rolling position. The specific implementation process is to use the sensor to measure the distance in real time, and the two front vertical rolls of the finishing mill will move synchronously. The distance is SS / 2, such as Figure 4 shown.

[0045] The advantage of this method is that it can effectively shorten the waiting time, and at the same time, the smaller the distance, the smaller the adjustment range and the shorter the adjustment time.

[0046] According to the above steps, in the case of rolling special steel grades and other production abnormalities, the operator can flexibly change a...

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Abstract

The invention provides a hot continuous rolling production line finishing mill front vertical roller short stroke control method. The method includes the following steps that S1, the target band steel width H, the waiting allowance RD and the short stroke allowance SS are set; S2, a finishing mill front vertical roller is adjusted to reach a waiting position; S3, the finishing mill front vertical roller is adjusted to reach a rolling position. The whole operating process is completely based on an existing control host, the short stroke value of the finishing mill front vertical roller can be directly set and modified on the control host through program embedded supplementation, and the short stroke of the finishing mill front vertical roller is controlled in a layered and specialized mode under different conditions that specifications, steel types and the like are distinguished instead of an existing single short stroke.

Description

technical field [0001] The invention relates to the field of hot continuous rolling production line control, in particular to a short-stroke control method for front vertical rolls of a finishing mill in a hot continuous rolling production line. Background technique [0002] There are vertical roll structures in front of the finish rolling unit of some hot continuous rolling production lines, such as figure 1 As shown, the finish rolling vertical roll device is located after the flying shear and finish rolling descaling box equipment, and before the finish rolling stand. The rollers are then introduced to the finishing mill by the finishing vertical rollers for final rolling of the finished product. The finish rolling vertical roll generally adopts cylindrical roll type without pass. Since the strip thickness has been significantly reduced after rough rolling and reaching the finish rolling entrance, if the finishing rolling vertical roll is the same as the rough rolling ve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/58
Inventor 王鹏李文王克柱杨恒赵月强赵磊
Owner SHANDONG IRON & STEEL CO LTD
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