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High-strength, low-temperature, and thick-gauge hot-rolled plate strip coil shape control method

A control method and thick gauge technology, which are applied in the coil shape control of high-strength, thick gauge hot-rolled strips and low temperature fields, can solve the problems of coil quality dislocation, etc., so as to improve product quality, increase efficiency, and eliminate dislocation. Effect

Active Publication Date: 2015-06-17
SHANGHAI MEISHAN IRON & STEEL CO LTD
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AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at the technical problems existing in the prior art, and provides a method for controlling the coil shape of high-strength, low-temperature, thick-spec hot-rolled strips, and solves the problem of coil quality when rolling such products in current hot-rolling enterprises. Serious misalignment problem

Method used

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  • High-strength, low-temperature, and thick-gauge hot-rolled plate strip coil shape control method
  • High-strength, low-temperature, and thick-gauge hot-rolled plate strip coil shape control method
  • High-strength, low-temperature, and thick-gauge hot-rolled plate strip coil shape control method

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Embodiment 1

[0033] see figure 2 , 3 , a method for high strength, low temperature, thick gauge hot-rolled strip volume control, the concrete steps of the method are as follows,

[0034] 1) Before the strip steel arrives at the coiler, the pinch roller and the auxiliary winding roller are in the roll gap control mode;

[0035] 2) After the pinch roll bites the strip, the pinch roll switches from the roll gap control mode to the pressure control mode;

[0036] 3) During the first few laps of strip steel coiling, 1#, 2#, 3# auxiliary winding rollers are in the pressure or roll gap control mode;

[0037] The above control is the same as the prior art, and the invention points of this technology are as follows:

[0038] 4) After the first few laps of strip steel on the reel (X 0 The number of laps is manually set), 2# winding-assisting rollers are all opened, so that the roll unloading trolley can rise up, ready to unload, 1#, 3# winding-assisting rollers enter the stepping control mode, ...

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Abstract

The present invention relates to a high-strength, low-temperature and thick-gauge hot-rolled plate strip coil shape control method, which is characterized in that the control method comprises that: 1) before a strip steel reaches a coiler, a clamping and conveying roller and auxiliary coiling rollers are in roller gap control manners; 2) after the clamping and conveying roller bites the strip steel, the roller gap control manner of the clamping and conveying roller is switched into a pressure control manner; 3) during coiling of the previous several circles of the strip steel by a coiling cylinder, the auxiliary coiling rollers 1#, 2# and 3# are in the pressure control manners or roller gap control manners; 4) after coiling of the previous several circles of the strip steel by the coiling cylinder, the number of the circles is set as the X0 and is manually set, the auxiliary coiling roller 2# is completely opened so as to make a coil unloading trolley lift and be ready for unloading, and the auxiliary coiling rollers 1# and 3# enter a stepping control manner and the roller gap control and pressure control alternate control manner, wherein the phenomenon that the auxiliary roller always presses on the strip steel so as to cause the strip steel surface scratch can be avoided; and 5) the clamping and conveying roller both-side pressure control PID adjuster control parameters P value and I value are adjusted.

Description

technical field [0001] The invention relates to a method for controlling the coil shape of high-strength, low-temperature, and thick-gauge hot-rolled strips, which is an effective control method for solving the serious dislocation of the coil quality when rolling such products in current hot-rolling enterprises. [0002] Background technique [0003] With the demand of the market, the products of hot-rolled enterprises continue to expand to high-end. Rolling high-strength, low-temperature, thick-gauge strips has become an important means for individual enterprises to expand their profitability, such as X70, X80 and other products, which are used to manufacture spiral buried Arc-welded pipe steel is a brand in the American Petroleum Institute standard API Spec 5L "Pipeline Steel Pipe Specification". High hardness and low coiling temperature lead to unsatisfactory coil shape control quality when hot rolling companies coil such products, and serious misalignment occurs (such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C47/04
Inventor 张奉贤朱成功姚禹
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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