Control method for dynamic shearing displacements of flying shear of hot continuous rolling mill

A technology of hot continuous rolling mill and control method, which is applied in the direction of computer control, program control, shearing device, etc., can solve the problems of affecting rolling stability, shearing waste, and reducing yield, and achieve high-precision shearing control Effect

Active Publication Date: 2015-09-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount of shear is too small, the shape of the head and tail of the strip will be poor, causing the strip to enter the rolling mill, causing uneven contact between the roll and the surface of the strip, and affecting rolling stability; The billet is cut off, resulting in cutting waste and reducing the yield

Method used

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  • Control method for dynamic shearing displacements of flying shear of hot continuous rolling mill
  • Control method for dynamic shearing displacements of flying shear of hot continuous rolling mill
  • Control method for dynamic shearing displacements of flying shear of hot continuous rolling mill

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Embodiment 1

[0036] Such as image 3 Described, a kind of hot rolling mill flying shear dynamic shear amount control method, comprises the following steps:

[0037] S1: Set the standard roll speed V 0 , the initial shear length of the head L 0 , and the strip thickness T is obtained by measurement;

[0038] Standard roll speed V 0 The value is selected according to the characteristics of the rolling mill, usually the speed is less than 3m / s;

[0039] Head initial cut length L 0 Controlled by the process machine or set by experience;

[0040] The thickness T of the strip steel is obtained through the actual measurement of the position sensor of the oil cylinder of the water cutting roller. The oil cylinder of the water cutting roller is equipped with a position sensor. At this time, the water cutting roller will be in close contact with the strip steel, so the value displayed by the water cutting roller position sensor is the actual thickness value of the strip steel.

[0041] S2: Ac...

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Abstract

The invention discloses a control method for the dynamic shearing displacements of a flying shear of a hot continuous rolling mill. The control method comprises the following steps: setting a standard roll speed and initial head shearing lengths, and obtaining the thicknesses of strip steels through measurements; calculating according to the standard roll speed and through an experimental combination with an actual roll speed during actual working to obtain the velocity compensation factors of the strip steels; obtaining a primary shearing compensation quantity; carrying out a secondary amendment on the primary shearing compensation quantity by virtue of the velocity compensation factors of the strip steels, and finally obtaining actual head shearing displacements. According to the control method disclosed by the invention, the shearing displacements are compensated by combining with the changes of the shearing angles of the strip steels with different thicknesses during the shearing of the flying shear and the depreciation condition of the flying shear, and then a compensation result is secondarily amended according to the characteristics of the strip steels during a shearing process and by virtue of the velocity factors, thus realizing high-accuracy shearing control.

Description

technical field [0001] The invention relates to the field of hot continuous rolling, in particular to a method for controlling flying shear of a hot continuous rolling mill. Background technique [0002] The "Double-scale flying shear" Chinese patent with the patent number "CN200820073677.8" discloses a double-scale flying shear, including: a DC motor, an electronic control unit, a speed control unit, a flying shear body and a finished rolling mill; the electronic control unit The PLC receives the signals of the finished rolling mill encoder, hot metal detector and proximity switch respectively, and communicates with the man-machine interface unit. The speed control unit receives the control signal in the electric control unit PLC and connects with the DC motor. The flying shear body and the flying shear head are connected in sequence. The front end of the flying shear head is sequentially provided with a hot metal detector and a finished rolling mill. The hot metal detector...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/404B23D25/02
CPCB23D25/02G05B19/404
Inventor 荣鸿伟周兴泽徐欣磊
Owner BAOSHAN IRON & STEEL CO LTD
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