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A Method for Predicting the Width of Hot-rolled Strip Steel

A prediction method and technology of hot-rolled strip steel, applied in the field of rolling, can solve problems such as large overshoot, long adjustment time, and reduced control system stability, and achieve the effects of saving production investment costs, improving precision, and accurate calculations

Active Publication Date: 2017-06-16
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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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, 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

Method used

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  • A Method for Predicting the Width of Hot-rolled Strip Steel
  • A Method for Predicting the Width of Hot-rolled Strip Steel
  • A Method for Predicting the Width of Hot-rolled Strip Steel

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Embodiment Construction

[0064] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0065] 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.

[0066] A method for predicting the width of hot-rolled strip steel, such as Figure 6 shown, including the following steps:

[0067] 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;

[0068] 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 bet...

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Abstract

The invention provides a method for predicting the width of hot-rolled strip, which includes: determining the exit thickness of the hot-rolled slab, the entrance thickness, the entrance width and the entrance temperature of the hot-rolled slab according to the process specification data of a certain pass of hot rolling; detecting the hot-rolled steel strip width. The entrance speed of the slab and the roll speed are used to obtain the roll radius and the friction factor between the roll and the slab; the width prediction model of the hot-rolled slab at any position in the rolling deformation zone is used to predict the strip width after rolling; the present invention predicts the hot-rolled strip By predicting the width of the steel strip, the width after rolling is closer to the actual value on site, which has irreplaceable theoretical value and practical application value with the numerical fitting method. Based on comprehensive consideration of various process parameters in the rolling process, the strip width after rolling can be accurately predicted during the rolling process, which solves the problem of predicting the width of the slab after rolling under different production conditions. The invention can calculate the post-rolling width online, thereby saving production investment costs and improving the accuracy of width control.

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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Patent Type & Authority Patents(China)
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 LIAONING
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