Hot-rolled strip steel width prediction method

A prediction method and technology for hot-rolled strip, applied in the field of rolling, can solve the problems of long adjustment time, the inability of the width adjustment amount to control the signal in time, and the large overshoot amount.

Active Publication Date: 2016-05-18
NORTHEASTERN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

At present, the width control technology at home and abroad is to use the width measuring device after the rolling mill to carry out width feedback control, which has a certain hysteresis, s

Method used

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  • Hot-rolled strip steel width prediction method
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  • Hot-rolled strip steel width prediction method

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Embodiment Construction

[0065] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0066] In this embodiment, take a 1450mm hot continuous rolling roughing unit in a factory as an example, the equipment layout is as follows figure 1 As shown, among them, E1, E2 are vertical roll mills, R1, R2 are flat roll mills.

[0067] A method for predicting the width of hot-rolled strip steel, such as Image 6 shown, including the following steps:

[0068] Step 1: Determine the outlet thickness of the hot-rolled slab according to the data of a certain hot-rolled pass process specification 2h 1 =0.1941m, entrance thickness of hot-rolled slab 2h 0 =0.2339m, entrance width 2w 0 =1.2712m and inlet temperature T=1162°C, slab steel type: Q235;

[0069] Step 2: Detect the inlet velocity v of the hot-rolled slab 0 = 1.444m / s and roll speed v R =1.66m / s, obtain the roll radius R=0.643m and the friction factor m=2μ=0.56 betw...

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Abstract

The invention provides a hot-rolled strip steel width prediction method. The hot-rolled strip steel width prediction method comprises the following steps: an outlet thickness, an inlet thickness, an inlet width and an inlet temperature of a hot-rolled plate blank are determined according to technological procedure data in one pass of hot rolling; an inlet speed of the hot-rolled plate blank and a roller speed are detected to obtain a roller radius and a friction factor between a roller and the plate blank; and a strip steel after-rolled width is predicted by using a width prediction model of the hot-rolled plate blank in any position of a rolling deformation area. The hot-rolled strip steel width prediction method predicts the broadening condition of the hot-rolled steel strip; the obtained strip steel after-rolled width is more close to an actual scene value; and the hot-rolled strip steel width prediction method has theoretical value and actual application value incapable of being replaced by a numerical value fitting method. On the basis of comprehensively considering all process parameters in the rolling process, the hot-rolled strip steel width prediction method precisely predicts the strip steel after-rolled width in the rolling process, and solves the problem of prediction of the plate blank after-rolled width under different production conditions. The hot-rolled strip steel width prediction method can obtain the after-rolled width through online calculation, and improves the width control precision when saving the production investment cost.

Description

technical field [0001] The invention belongs to the technical field of rolling, in particular to a method for predicting the width of a hot-rolled steel strip. Background technique [0002] With the development of hot-rolled production technology and the increasing quality requirements of users for hot-rolled strip products, width accuracy has gradually become an important indicator of product quality. Expansion makes the research on width control more and more important. At present, the width control technology at home and abroad is to use the width measuring instrument equipment after the rolling mill to carry out width feedback control, which has a certain hysteresis, so that the width adjustment amount cannot control the action of the signal in time, and there is a large overshoot and a long adjustment time. , reducing the stability of the control system. Therefore, it has more and more practical significance and application value to use mathematical model to accuratel...

Claims

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Application Information

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IPC IPC(8): B21B38/04
CPCB21B38/04B21B2261/06
Inventor 刘元铭王青龙孙杰龚殿尧张殿华赵德文
Owner NORTHEASTERN UNIV
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