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Method and device for controlling belt threading

A control method and strip threading technology, applied in the direction of rolling force/roll gap control, etc., can solve problems such as work roll damage, broken strip, improper operation, etc.

Active Publication Date: 2022-03-08
BEIJING SHOUGANG COLD ROLLED SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a control method and device for threading and starting, which is used to solve the problems in the belt threading process in the prior art when strip steel of thick and narrow specifications is threaded and started. There are technical problems such as broken belts and improper operation during start-up, which lead to damage to the work rolls, thereby reducing the working efficiency of the production line

Method used

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  • Method and device for controlling belt threading
  • Method and device for controlling belt threading

Examples

Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a control method for starting a car with a belt on, such as figure 1 shown, methods include:

[0037] S110, before threading the strip, flatten the lead of the strip;

[0038] In order to avoid the warping of the lead to affect the belt threading, before threading the strip, use a leveling tool to flatten the lead of the strip; make the lead meet the following flattening parameters: the warped length of the lead is 10-20mm, and the tilting angle is 2 ~7°, no major deformation within 2 to 4 meters of the lead is relatively flat.

[0039] S112, control the pressing rollers, strip guide plates and strip steel clamping parts of each finishing stand to be in a raised state, and control the roll gap of each finishing stand to be in an open state;

[0040] Before threading, control the pressing rollers, threading guides and strip clamping parts of each finishing stand to be in a raised state, and control the roll gap of each finishing stand to be in ...

Embodiment 2

[0054] This embodiment also provides a control device for putting on the belt and starting the car, such as figure 2 As shown, the device includes: a processing unit 21, a first control unit 22 and a second control unit 23; wherein,

[0055] In order to avoid the lifting of the lead to affect the threading, before threading the strip, the processing unit 21 is used to flatten the lead of the strip with a leveling tool; so that the lead meets the following smoothing parameters: the length of the lead warped is 10-20mm , The tilting angle is 2 to 7°, and the lead is relatively flat without large deformation within 2 to 4 meters.

[0056] Before threading, the first control unit 22 is used to control the pressing rollers, threading guides and strip clamping parts of each finishing stand to be in a raised state, and to control the roll gap of each finishing stand to be in an open state; Place it at the entrance of the first finishing stand and start threading. During the strapp...

Embodiment 3

[0068] In practical application, when the strip steel with a thickness of 5mm, a width of 1007mm and a yield strength of 552Mpa is put on and started, the specific implementation is as follows:

[0069] In order to avoid the lifting of the lead to affect the belt threading, before threading the strip, use a leveling tool to flatten the lead of the strip; the length of the lead is 11mm, the tilting angle is 5°, and there is no comparison within 2 to 4 meters of the lead. Large deformation is relatively flat.

[0070] Before threading, control the pressing rollers, threading guides and strip clamping parts of each finishing stand to be in a raised state, and control the roll gap of each finishing stand to be in an open state; place the lead on the first finishing stand. The entrance begins to wear the belt. During the strapping process, the strapping situation of the leader needs to be tracked, so that the strapping can be adjusted in time.

[0071] After the tape head comes o...

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Abstract

The embodiment of the present invention provides a control method and device for strip threading and start-up. The method includes: before threading the strip steel, smoothing the strip head of the strip steel; The threading guide plate and the strip clamping parts are in the lifted state, and the roll gaps of the various finishing stands are controlled to be in an open state; the outlet tension of the last finishing stand is controlled to be greater than 20KN; when the finishing stand is started, the control The pressure rollers, the strip threading guide plates and the strip clamping parts of each finishing stand are in the rolling state, and the minimum rolling force of the pressing roll gap of each finishing stand is controlled; the last finish rolling stand is controlled The bending degree of the working roll is 20-40%, and the bending degree of the middle roll is 30-50%.

Description

technical field [0001] The invention belongs to the technical field of tandem cold rolling, and in particular relates to a control method and device for threading and starting a car. Background technique [0002] In today's increasingly fierce market competition in the cold-rolled strip steel industry, methods to reduce costs and increase efficiency and improve work efficiency have become more important. [0003] At present, the high-strength strip with thick and narrow specifications in continuous rolling mills is a major problem that operators need to face when it is broken and stripped. In the process of stripping, there are often broken strips, and improper operation of the finishing rolling stand after starting up causes injuries. Roller and other problems reduce the work efficiency of the production line. SUMMARY OF THE INVENTION [0004] Aiming at the problems existing in the prior art, the embodiments of the present invention provide a control method and device fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/58
CPCB21B37/58
Inventor 陈湘宁陈甚超陈彦旭宋浩源曾卫仔于海龙王斌马凯史风龙胡佳新王佳雨
Owner BEIJING SHOUGANG COLD ROLLED SHEET
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