Slab head and tail width prediction-based variable step size control method for rough rolling sizing machine

A control method and width-fixing machine technology, applied in the direction of rolling mill control devices, metal rolling, length measuring devices, etc., can solve problems such as the complexity of head and tail shapes, achieve optimal head and tail shape control, improve yield and width control The effect of precision

Inactive Publication Date: 2019-07-23
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

In this way, the two effects of widthwise depression and horizontal depression are superimposed, making the change of the shape of the head and tail more complicated

Method used

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  • Slab head and tail width prediction-based variable step size control method for rough rolling sizing machine
  • Slab head and tail width prediction-based variable step size control method for rough rolling sizing machine
  • Slab head and tail width prediction-based variable step size control method for rough rolling sizing machine

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Please combine Figure 4 to Figure 5 As shown, the variable step length control method based on the prediction of the head and tail width of a rough rolling mill provided by the present invention comprises the following steps:

[0026] S1. Calculate the head width deviation;

[0027] The factors affecting the prediction of the head and tail width of the slab include a series of factors such as the slab width, side pressure, slab temperature, width-to-thickness ratio, etc., which can be calculated using classical formulas, or the main influencing factors can be determined according to the characteristics of the production line, based on process data Determining the parameters and the specific method for predicting the width of the head and tail are not regarded as the content of the invention.

[0028] The embodiment i...

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Abstract

The invention discloses a slab head and tail width prediction-based variable step size control method for a rough rolling sizing machine. The method comprises the following steps of S1, calculating the width deviation value of a slab head part; S2, calculating the stepping length of the slab head part and a slab tail part according to the deviation obtained in S1; S3, enabling the primary beatingposition of a slab to reach a station in the pressure measuring sizing machine; S4, enabling a downward pressing module of the pressure measuring sizing machine to downwards press the slab head part for the first time; S5, carrying out stepping and downward pressing according to the calculated stepping quantity for three steps of the head part ; S6, keeping the conventional fixed stepping quantitytill the tail part; and S7, carrying out stepping and downward pressing according to the calculated tail part stepping quantity for the three times of the tail part. According to the method, different stepping lengths are set according to the head and tail width prediction under the factors of different slab widths, pressure measurement and the like, so that the head and tail control condition isoptimized, and the strip steel yield and the width control precision are improved.

Description

technical field [0001] The invention relates to a large-scale pressure measuring and width measuring machine for hot continuous rolling rough rolling, and more specifically relates to a variable step length control method for a rough rolling and width measuring machine based on the prediction of the head and tail width of a slab. Background technique [0002] The rough rolling of the existing hot continuous rolling production line is equipped with a large pressure measuring and width setting machine, which can reduce the width specification of the continuous casting slab, which is conducive to the logistics connection between the steelmaking plant and the rolling mill, and creates economic benefits for the enterprise benefit. There is a stop-and-go large pressure measuring and width measuring machine, referred to as SSP, such as figure 1 As shown, under the common drive of the main eccentric and the synchronous mechanism, the pressure measurement module 1 compresses the sla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/22B21B38/06
CPCB21B37/22B21B38/06B21B2261/06
Inventor 刘苗幸利军
Owner BAOSHAN IRON & STEEL CO LTD
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