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Control method for precise positioning of drum notch of steekle mill

A technology for precise positioning and steckel rolling mills, which is applied in the direction of rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems of increasing the difficulty of precise positioning control of notches, achieves improved positioning control accuracy, simple and high-efficiency implementation Effect of precision positioning control

Active Publication Date: 2020-06-26
北京科技大学设计研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equipment of the furnace coiler mainly includes a reel, a reducer and a transmission motor. Due to the mechanical clearance, inertia of the equipment and the control accuracy of the transmission system, when the given value of the coiler speed is zero, the coiler cannot stop for a moment, Figure 4 As shown, this stage is equivalent to the out-of-control stage, which increases the difficulty of controlling the precise positioning of the notch

Method used

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  • Control method for precise positioning of drum notch of steekle mill
  • Control method for precise positioning of drum notch of steekle mill
  • Control method for precise positioning of drum notch of steekle mill

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The program is implemented on a 1780mm coil rolling line in a factory, and the specific implementation steps are as follows:

[0052] Step 1: At the moment when the positioning of the reel notch is started, first judge whether the automatic positioning is completed when the reel rotates the first turn or the positioning is completed when the reel turns the second turn according to the value of the angle feedback value θ of the reel notch. The basis for judging the number of turns n required to complete positioning is:

[0053]

[0054] In the formula, β is the threshold for judging the number of positioning circles;

[0055] Among them, the calculation formula of β is: LU=1.0m / s, K=0.1.

[0056] Step 2: Calculate the control deviation e according to the feedback value θ of the notch angle of the reel and the number of turns n required for the notch to complete the positioning. The calculation formula is: e=360n-θ;

[0057] Step 3: Start the positioning control of...

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Abstract

The invention provides a control method for precise positioning of a drum notch of a steekle mill, and belongs to the technical field of metal processing control. This method comprises the following steps of: firstly calibrating a threading position of the drum notch as zero, when starting the automatic positioning of the drum notch, subtracting the drum notch angle feedback value Delta by 360 asa control deviation e, dynamically adjusting the linear speed of a reeling machine according to the size of the control deviation e, when the actual angle of the notch is greater than a control threshold value Gamma, setting the linear speed of the reeling machine as zero to complete the automatic positioning of the drum notch, when the feedback linear speed of the reeling machine is zero, savingthe control deviation e at this moment, and carrying out self-learning to the threshold value Gamma according to the size of e so as to improve the positioning precision of the next notch. Based on aself-learning algorithm, the control method does not require human intervention in a control process, and the control precision and stability of a steekle mill notch positioning control system are improved.

Description

technical field [0001] The invention relates to the technical field of metal processing control, in particular to a control method for precise positioning of a coil notch of a steckel rolling mill. Background technique [0002] Steckel mill production line is a form of hot rolling production line, which is characterized in that a coiling furnace is arranged on the entrance side and the exit side of the reversing rolling mill respectively. The coiler equipment structure of the coiling furnace is similar to that of the traditional downcoiler. Different, the furnace coiler does not have coiling aids such as coiling rolls or coiling belts. It fixes the head of the strip through the notch on the coil of the furnace coiling mill, and then performs subsequent strip building and coiling. production work. The coiling process control process of the steckel rolling mill is as follows: before threading the strip, the notch of the reel is first accurately positioned so that the notch is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/00
CPCB21B37/00
Inventor 任晓怀宗胜悦熊创邵泽州
Owner 北京科技大学设计研究院有限公司
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