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: 2008-07-23
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
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  • Claims
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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 relate to a control technique of the rolling process of a rolling steel. The invention discloses a control method of a rough rolling intermediate billet camber. The control method combines a position control with a pressure control; in a multi-pass rolling of the positive-pass and reverse-pass of a roughing mill, the camber generation of the intermediate billet is restricted. The control method of the invention can reduce the additional value of the openness of a side guide plate, leads the flexible deformation of the intermediate billet between the inlet and the outlet of the roughing mill in the horizontal direction to be restricted by the side guide plate, reduces the camber of the intermediate billet, and prevents the severe abrasion which is caused by the long-term contact of the side guide plate and the intermediate billet.

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 Applications(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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