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Inner-furnace tension compensation control method suitable for continuous rolling horizontal type annealing furnace

A horizontal annealing furnace, compensation control technology, applied in heat treatment process control, furnace, heat treatment furnace, etc., can solve problems such as tension fluctuations in the furnace, improve production efficiency and product quality, reduce abnormal downtime, and avoid damage Effect

Active Publication Date: 2018-10-19
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing technology, solve the problem of tension fluctuation in the continuous rolling super-long annealing furnace during the process of acceleration and deceleration, and the problem of smooth transition to the tension setting value when the steel specification changes, an applicable In-furnace tension compensation control method for continuous rolling horizontal annealing furnace to improve production efficiency and product quality

Method used

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  • Inner-furnace tension compensation control method suitable for continuous rolling horizontal type annealing furnace
  • Inner-furnace tension compensation control method suitable for continuous rolling horizontal type annealing furnace
  • Inner-furnace tension compensation control method suitable for continuous rolling horizontal type annealing furnace

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Embodiment 1

[0032] In this embodiment one, the ultra-pure ferritic steel 441 with a size specification of 1.1×1250mm is taken as an example, as figure 1 The bouncing roller device and the bouncing roller movement closed-loop control system are installed as shown, when the steel strip of the same specification passes through the annealing furnace, the influence of the acceleration and deceleration process in the furnace area on the tension in the furnace:

[0033] Before the steel coil goes online, the width of the ferritic steel 441 is measured by the on-site sensor in the program, and the given value of the thickness gauge at the exit of the rolling mill is collected through the rolling mill. Calculate ΔW=|1252mm-1249mm|=3mm, Δh=|1.098mm-1.105mm|=0.007mm, determine the compensation coefficient n as 0.5,

[0034] Ultra pure ferritic steel 441

previous volume

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width

1249mm

1252mm

thickness

1.105mm

1.098mm

[0035] Such as fi...

Embodiment 2

[0038] In the second embodiment, the ultra-pure ferritic steel 441 with a size specification of 1.1×1250 mm is changed into an ultra-pure ferritic steel 441 with a size specification of 1.5×1500 mm as an example, such as figure 1 The bouncing roller device and the bouncing roller motion closed-loop control system are installed as shown in the figure. Under the same strip speed, the influence of the specification change process on the tension in the furnace is as follows:

[0039] Ultra pure ferritic steel 441

[0040] The speed of the steel strip in the annealing furnace is fixed at 50m / min, and the program selection is used to calculate ΔW=|1505mm-1248mm|=257mm, Δh=|1.498mm-1.102mm|=0.396mm, and the compensation coefficient n is determined to be 1.1, such as image 3 , Dimensions and specifications change, the program calculates that the set value of tension in the furnace is changed from 11.96kN to 15.09kN. During the rolling process, through the spring roller tensi...

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Abstract

The invention provides an inner-furnace tension compensation control method suitable for a continuous rolling horizontal type annealing furnace and belongs to the technical field of continuous rollinghorizontal type annealing furnace production line. Technical problems of super long inner-furnace tension wave in the continuous rolling annealing furnace and smooth transition to a set value of tension when specifications of steel types vary are solved. The solution scheme includes the steps of a, a bouncing roller device is arranged at the outlet position of the continuous rolling horizontal type annealing furnace; the opening degree of a servo valve of the bouncing roller is controlled through the deviation of data collected by a tensometer and a pressure sensor from the set value; and corresponding compensation factors n are provided respectively; b, the inner-furnace steel belt speed v and the actual steel belt tension value are collected in real time, wherein according to the difference value-FACT between the collected actual tension value of the steel belt at the outlet of the continuous rolling horizontal type annealing furnace and the set tension value, mathematical models are established, and compensation value needed for the change of inner-furnace tension is calculated; and c, the tension value needed to be compensated is changed into the difference value between the set value of the gas pressure compensated and the on-the-spot feedback gas pressure; the opening degree of the servo valve of the bouncing roller is adjusted; and smooth and steady inner-furnace tension of the continuous rolling horizontal type annealing furnace is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of a continuous rolling horizontal annealing furnace production line, and in particular relates to a furnace tension compensation control method suitable for a continuous rolling horizontal annealing furnace. Background technique [0002] After the stainless steel continuous cold rolling production line completes strip rolling, a series of processes such as horizontal furnace annealing, pickling, and leveling are directly carried out. The design speed of the annealing and pickling area is 170m / min. The length of the annealing furnace is longer than that of the general production line, and the actual length on site It is 294m. Due to the special limitation of the annealing process, the tension in the annealing zone is very small. During the acceleration and deceleration process and when the steel specification (thickness, width, etc.) changes, the tension in the furnace fluctuates greatly, which affects the ...

Claims

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Application Information

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IPC IPC(8): C21D11/00C21D9/56
Inventor 韩新建韩存武志平何凯胡智慧
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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