Controlling method of rough rolling breakdown bar camber

A control method, camber technology, applied in rolling mill control devices, metal rolling, contour control, etc., can solve the problem that it is difficult to accurately find out the quantitative relationship between roll gap difference and camber

Active Publication Date: 2009-12-09
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0006] There are two difficulties in the above-mentioned control method. First, the camber caused by temperature and roll gap difference is coupled together, so it is difficult to clearly determine which reason is at work; second, it is difficult to accurately The quantitative relationship between the roll gap difference and the camber can be accurately found out, so in actual operation, the operator often makes adjustments based on experience

Method used

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  • Controlling method of rough rolling breakdown bar camber
  • Controlling method of rough rolling breakdown bar camber
  • Controlling method of rough rolling breakdown bar camber

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Embodiment Construction

[0020] A method for controlling the sickle curve of the rough rolling intermediate slab, which is to jointly control the position and pressure of the side guide plate. In the multi-pass rolling of the forward and reverse passes of the rough rolling mill, the opening degree of the side guide plate can be reduced. The added value makes the side guide plate constrain the bending deformation of the intermediate billet at the entrance and exit of the roughing mill in the horizontal direction, so as to reduce the camber of the intermediate billet and prevent the side guide plate from being in contact with the intermediate billet for a long time to cause serious wear.

[0021] The position control of the side guide plate (APC for short) refers to the short stroke control of the side guide plate, that is, when the intermediate blank 5 does not enter the side guide plate 1, the opening degree of the side guide plate 1 is in the waiting position, and the opening degree is equal to that of...

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Abstract

The invention relates to the control technology in the steel rolling process. The invention discloses a method for controlling the sickle curve of an intermediate billet in rough rolling. The control method adopts the combination of position control and pressure control, and suppresses the generation of sickle in the intermediate billet during the multi-pass rolling of forward and reverse passes in the rough rolling mill. bend. The control method of the present invention can reduce the added value of the opening of the side guide plate, so that the side guide plate restrains the bending deformation of the intermediate billet at the entrance and exit of the roughing mill in the horizontal direction, and realizes the purpose of reducing the camber of the intermediate billet. It can prevent the severe wear caused by the long-term contact between the side guide plate and the intermediate blank.

Description

(1) Technical field [0001] The invention relates to the control technology in the rolling process of steel rolling, in particular to the control method of the camber of the rough rolling intermediate slab. (2) Background technology [0002] During the hot rolling process, the intermediate billet after each pass of the roughing mill is bent in the horizontal direction, which is usually called camber. There are two main reasons for the camber of the intermediate billet. One is that the deformation of the thickness direction of the two sides of the intermediate billet is inconsistent due to the deviation of the roll gap between the working side and the driving side of the horizontal rolling mill, which causes one side to extend horizontally than the other side. Bending; secondly, due to the temperature difference between the working side and the driving side of the intermediate billet, the deformation in the thickness direction of the two sides of the intermediate billet is inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/68B21B37/48B21B37/28B21B39/14
Inventor 王自强黄传清
Owner BAOSHAN IRON & STEEL CO LTD
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