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Side guide plate variable pressure control method of hot-continuous-rolled chromium-series stainless steel recoiling machine

A pressure control, stainless steel technology, applied in the field of coiling control of hot continuous rolling strip steel, can solve the problems of poor edge quality of coiled steel strip, high pressure of side guide plate, damage of side guide equipment, etc., and achieve edge quality The effect of improving, reducing horn volume, and reducing maintenance costs

Active Publication Date: 2015-08-05
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, when the coiler is coiling steel, one side of the coiling side guide plate is controlled by pressure. Due to the large change in the width of the stainless steel strip, it is very easy to cause a large pressure on the edge of the strip by the side guide plate, resulting in hot continuous rolling stainless steel coiling. The quality of the edge has not been very good, resulting in the edge of the strip being gnawed, a large number of pits on the surface of the strip, and in severe cases, horn rolls will occur, and the side guide equipment is also seriously damaged

Method used

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Embodiment Construction

[0020] This embodiment is automatically realized in the computer program: the first-level computer automatically realizes the side guide variable pressure control program of the coiler according to the strip steel type, and the variable pressure control benchmark algorithm is as follows: ka*F

[0021] Among them: F——Original pressure control reference, F=C*K*H*W*L*RHO;

[0022] C——Pressure correction coefficient, the value is 0~1;

[0023] K—— lateral guide pressure calculation model constant, take the value of 0.25;

[0024] H——strip thickness (mm);

[0025] W——strip width (mm);

[0026] L——the distance from the end frame to the pinch roller (m);

[0027] RHO——The density of strip steel (7.7 g / cm 3 );

[0028] ka - variable coefficient (value 0.5 ~ 0.8).

[0029] For example: steel type 441 belongs to chromium series stainless steel, rolling specification: 5.0 * 1240 mm;

[0030] The control reference value of the original lateral pilot pressure is calculated by the co...

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Abstract

The invention discloses a side guide plate variable pressure control method of a hot-continuous-rolled chromium-series stainless steel recoiling machine, which is suitable for recoiling control of hot-rolled strip steel, that is, when the head of the strip steel penetrates through a side guide of the recoiling machine, a first-grade computer realizes a recoiling side guide pressure control procedure according to a second-grade sent chromium-series stainless steel mark and a recoiling load signal: a side guide variable pressure reference value is put into control for 800 milliseconds after the control of 100% side guide original pressure reference value for 300 milliseconds; the side guide variable pressure reference value is put into control for 800 milliseconds after the control of 100% side guide original pressure reference value for 300 milliseconds; and the side guide pressure reference values are alternately changed to control the recoiling side guide until the tail of the strip steel leaves from the side guide of the recoiling machine to retreat from the recoiling side guide pressure control. The control method eliminates the major quality hidden trouble of pocks and horn coils on the edge and the surface of the strip steel caused by the recoiling of side guide mechanical equipment, solves the influence on strip steel product quality caused by the recoiling of side guide, and improves the product pass percent.

Description

technical field [0001] The invention belongs to the field of coiling control of hot continuous rolling strip steel, and relates to the automatic control of the side guide plate of the hot continuous rolling strip steel coiler. Background technique [0002] At present, when the coiler is coiling steel, one side of the coiling side guide plate is controlled by pressure. Due to the large change in the width of the stainless steel strip, it is very easy to cause a large pressure on the edge of the strip by the side guide plate, resulting in hot continuous rolling stainless steel coiling. The quality of the edge has not been very good, resulting in the edge of the strip being gnawed, a large number of pits on the surface of the strip, and in severe cases, horn rolls will occur, and the side guide equipment is also seriously damaged. To improve the edge quality of the coiled strip and ensure the coil shape, the side guide pressure control of the hot-rolled coiled strip is one of t...

Claims

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Application Information

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IPC IPC(8): B21C47/02
Inventor 闫峥嵘康炜
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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