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Control device for hot rolling line

A control device and technology for rolling materials, which are applied in rolling mill control devices, driving devices for metal rolling mills, metal rolling, etc., can solve the problem of increased time required for rolling, increased energy consumption, and inability to ensure output interval time. and other problems to achieve the effect of reducing energy consumption

Active Publication Date: 2012-08-22
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Reducing the rolling speed in order to suppress the energy consumption of the hot rolling line will increase the time required for rolling, and it may not be possible to ensure the required output interval to achieve the target production volume.
On the other hand, by increasing the rolling speed, the target rolling time can be achieved, but there is a problem that energy consumption increases

Method used

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  • Control device for hot rolling line
  • Control device for hot rolling line
  • Control device for hot rolling line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0052] The control device 10 of the hot rolling line according to Embodiment 1 of the present invention is as follows: figure 1As shown, it is a control device for a hot rolling line 20, including an operating condition processing device 11, an output interval calculation device 12, a target rolling time calculation device 13, an initial plan calculation device 14, a plan correction device 15, and a rolling time forecast calculation device. device 16, rolling time adjustment device 17, and energy consumption adjustment device 18.

[0053] The hot rolling line 20 controlled by the control device 10 includes a heating furnace and a finishing mill including a plurality of rolling stands arranged continuously and cooling sprayers arranged between the plurality of rolling stands. Before describing the control device 10 in detail, refer to figure 2 The hot rolling line 20 will be described. figure 2 The hot rolling line 20 shown includes a furnace 21 , a roughing mill 23 , a fin...

Embodiment approach 2

[0176] Figure 10 shown for illustration in figure 1 The flow chart of the method of determining the output interval time in Embodiment 2 performed by the control device 10 of the hot rolling line 20 shown.

[0177]First, in step S1010, with reference to image 3 The method described in the flow chart 31 is the same, and the rolling operation period in which the total number of rolled materials 100 is P is calculated. Next, in steps S1020 to S1140, the following calculations are performed in the order of rolling for the rolled materials 100[1] to 100[P-1] in the rolling operation cycle.

[0178] In step S1030, the calculated output interval time t of the rolled material 100[a] EX [a] and the output interval time t of the rolled material 100[a+1] EX The combination of [a+1] is set as the first output interval time combination.

[0179] In step S1040, the energy consumption adjustment device 18 uses the output interval time t EX [a],t EX [a+1], refer to rolled material 10...

Embodiment approach 3

[0197] In addition to formula (1), the following formula (27) can also be used to calculate the output interval time t EX .

[0198] t EX = t Tgt / P+χ(dh)(dh[a]-dhAV)+χ(l)(l[a]-lAV)+

[0199] χ(FDTa)(FDTa[a]-FDTa AV )+χ(Rp(GC))(Rp(GC[a])-Rp(GC) AV )…(27)

[0200] In formula (27), dh is the reduction, l is the length of the rolled material, FDTa is the target FDT, and GC is the material type code. Values ​​marked with letters AV for each item represent the average value of all the rolled material to be treated. The function Rp() calculates the number of rolling passes of the rough rolling mill 23 based on the material type code GC.

[0201] In addition, the function χ () is calculated according to the variation of the required rolling time t relative to the variation of each item x of formula (27):

[0202] χ(x)=dt / dx...(28)

[0203] That is, in the control device 10 according to Embodiment 3 of the present invention, the output interval calculation device 12 calculate...

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Abstract

A rolling line material prediction and material control apparatus for controlling the material with high accuracy by having a function of simulating the variation course of a process and complementing information to improve the prediction accuracy of a material model. The apparatus has a rolling record information collecting function of collecting rolling record information obtained from a sensor for measuring the state of a hot rolling line and the state of a rolled steel sheet and from the controller for controlling the hot rolling line, process information supplement function for predicting process intermediate information representing the intermediate state of the rolling line not collectable as rolling record information on the basis of the rolling record information, fixed information such as the machine dimensions,; and target information such as on the thickness and width of the rolled steel sheet, material prediction function for predicting the material of the rolled steel sheet in synchronism with the progress of the rolling record information and the process intermediate information on the basis of the rolling record information and the process intermediate information, and material control function of making a control so that the predicted material agrees with the target one.

Description

technical field [0001] The invention relates to a control device for a hot rolling line for the manufacture of metal products. Background technique [0002] Generally, a hot rolling line includes: a heating furnace for heating the rolled material, a rough rolling mill and a finishing mill for rolling the heated rolled material, a cooling device for cooling the rolled material, and a rolling mill for rolling the rolled material. A winding machine that winds the rolled material into a coil shape. [0003] The temperature change of the rolled material on the hot rolling line will affect the material (mechanical properties) of the rolled material. In addition, the temperature of the material to be rolled during the rolling process will change the hardness of the material to be rolled, which has a great impact on the energy consumption required for the rolling process. Therefore, temperature measurement is performed by disposing thermometers on the exit side of the rough rollin...

Claims

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Application Information

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IPC IPC(8): B21B37/00B21B37/74
CPCB21B37/46B21B37/74B21B45/0233B21B2261/20B21B2275/04
Inventor 北乡和寿佐野光彦
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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