JPS63132709A - Controller for rolling mill - Google Patents

Abstract

PURPOSE:To improve the product quality and accuracy by installing devices concurrently detect information on both a planar shape and a temp. distribution and to perform coordinate controls of draft and temp. adjustment based on respective recognition results. CONSTITUTION:An infrared camera 9 concurrently detects information on a planar shape and a temp. distribution of a steel sheet 1, a planar shape recognizing device 10, and a temp. distribution recognizing device 11 are installed, respectively. The camera 9 images the sheet 1 right under a cooler 3 and makes the devices 10 and 11 recognize a planar shape and a temp. distribution of the entire sheet 1, respectively. Then, a coordinate controller 12 calculates an optimum cooling pattern correction amount and a draft position correction amount and makes drafting mechanisms 6, 6 and the water cooler 3 coordinately control the sheet 1. The quality and accuracy of the sheet 1 as a product are improved because a shape and temp. distributions are correlatively controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rolling mill control device for controlling the planar shape and temperature distribution of a rolled plate material such as a steel plate rolled on a rolling line.

[Prior Art] Fig. 2 is a block diagram showing a conventional rolling mill control device disclosed in, for example, Japanese Patent Publication No. 13883/1983. On the other hand, the temperature distribution in the width direction of the steel plate is controlled by a heating device.

In FIG. 2, 101.102 is a rolling mill, 103 is a steel plate rolled by the rolling mill 101.102, and 104.1
05 is a heating device that compensates for the temperature distribution in the width direction of the steel plate 103 on the operation side and drive side of the steel plate 103, respectively.

106 and 107 are load cells for detecting rolling loads on the operation side and drive side of the rolling mill 101, respectively, and 108 and 109 are load cells 106 and 1, respectively.
Steel plate 10 based on the detection results F%+s, Fds from 07
Temperature calculation device for calculating temperatures Tws and Tds at 3, 1
10 is a storage device for storing the difference signal (Tds-Tws) of the calculation results from the temperature calculation devices 1108 and 109; 11
1 transfers the data stored in the memory device ff1lo to the steel plate 103.
A transfer device 112 is a correction heating reference ΔR based on the temperature from the transfer device 111.
Calculate the heating equipment! ! This is a conversion device that outputs to 104.105.

In such an apparatus, the steel plate 103 is passed through the rolling mill 101 in the preceding stage.
When the load cell 10 on the operation side is being rolled by
From the rolling load Fws which is the output of No. 6, the input side and exit side plate thicknesses Hws, hws, and the rolling speed V.

The temperature calculation device 108 calculates the operation side temperature Tws, and also calculates the rolling load Fds, which is the output of the drive side load cell 107, and the input side and exit side plate thicknesses Hds.

hds and the rolling speed V, the temperature calculation device E109 calculates the operating side temperature Tds.

Then, in the storage device 110, the temperature calculation device 108
．． The difference between T%Is and Tds, which are the outputs of the steel plate 109, is stored, and this stored temperature difference is transferred to the heating devices 104 and 105 according to the conveyance state of the steel plate 103 by the transfer device 111.
will be tracked up to.

This temperature difference is input to the conversion device 112, where a corrected heating reference ΔR is calculated.

Heating device on the operating side! By subtracting from the reference RIIIs of 104, the reference Rds of the heating device @105 on the driving side is obtained.

In this way, the corrected heating reference ΔR is corrected according to the position of the steel plate 103, and each heating device 104, 105
By operating the steel plate 103, the temperature difference between the operating side and the driving side of the steel plate 103 is controlled to be eliminated, and temperature disturbances are removed during rolling in the subsequent rolling mill 102.

Furthermore, FIG. 3 is a schematic diagram showing a conventional rolling mill control device disclosed in, for example, Japanese Patent Publication No. 59-26366. This is to control the planar shape of the steel plate 103 so as to correct it.

In FIG. 3, 120 is a steel plate 10 as a plate material to be rolled.
A pair of upper and lower rolling rolls for rolling 3, 121 is a steel plate 10
A camera that images the planar shape (especially camber) of No. 3, 12
2 is the plane shape detection result of the camera 121 (captured image information)
a camber recognition device that calculates the camber of the steel plate 103 from 123, a calculation device that calculates the difference in thickness in the width direction to correct the calculated camber, and 124 a rolling mechanism that adjusts the roll gap; are respectively disposed on the operating side and the driving side in a rolling mill equipped with the rolling rolls 120. Also, 125 is an arithmetic unit! This is a lowering control device that controls the lowering mechanism 124 based on the calculation result of 123.

In such a device, a camber recognition device 11224:, based on the image information captured by the camera 121,
The camber of 03 is calculated, and based on the calculated camber, the calculation device 123 calculates the thickness difference in the width direction for correcting the camber.

Then, the reduction control device 125 compares the calculated target thickness difference with the current thickness difference, and controls the reduction mechanism 124 so that the steel plate 103 approaches the target thickness difference. do.

In this way, the camber of the steel plate 103 is corrected and controlled.

[Problems to be Solved by the Invention] As described above, as a conventional rolling mill control device, the steel plate 103
The temperature distribution and camber of
It has been proposed to separately and independently control the lowering mechanism 124 and lowering mechanism 124.

However, in reality, there is a close relationship between changes in temperature distribution and planar shapes such as camber, and there are limits to obtaining high-precision products by controlling them alone6. If the temperature distribution in the width direction of the steel plate 103 is uneven, the rolling load will also be uneven in the width direction of the steel plate 103, and a difference will occur in the thickness of the sheet exiting from the rolling mill in the width direction, causing camber. In such a case, even if the temperature distribution of the steel plate 103 is not controlled and only the roll gap control, that is, the rolling load control is performed by the rolling down mechanism 124, the fundamental cause, that is, the uneven temperature distribution is not resolved. If rolling continues, camber will occur again.

In this way, there is a mutual relationship between the temperature distribution of the rolled plate material and the planar shape such as camber, and conventional rolling mill control systems are extremely insufficient to manufacture high-precision products. Ta.

Therefore, it may be possible to combine the respective devices shown in Figures 2 and 3, but simply combining them will not work.
Due to the components in each device, not only the rolling mill control device but also the structure in the vicinity of the rolling mill becomes complicated.

This invention was made in order to solve the above-mentioned problems.It has a simple structure, and allows simultaneous and coordinated control of the temperature distribution and planar shape of rolled plates such as steel plates, so that the material quality is uniform. The object of the present invention is to obtain a rolling mill control device that allows manufacturing of high-precision products with good planar shapes.

[Means for Solving the Problems] A rolling mill control device according to the present invention includes a detection device that simultaneously detects planar shape information and temperature distribution information of a rolled plate material, and a detection device that detects the rolled plate material based on the detection results of the detection device. A planar shape recognition device and a temperature distribution recognition device are provided to recognize the planar shape and temperature distribution, respectively. A cooperative control device is provided that outputs a position control signal and a temperature adjustment signal to the rolling mechanism and the plate material temperature adjustment device, respectively.

[Function] In the rolling mill control device of the present invention, the planar shape recognition device and the temperature distribution recognition device each recognize the planar shape and temperature distribution of the rolled plate material from the detection results of the detection device, and based on the recognition results, The mutually correlated rolling down position control signal and temperature adjustment signal thus obtained are output from the cooperative control device to the rolling down mechanism and the plate material temperature adjustment mechanism. As a result, the rolling position of the rolling mill is adjusted, the planar shape of the plate to be rolled is controlled, the temperature distribution of the plate to be rolled is controlled, and these controls are mutually coordinated and controlled.
This is done while compensating each other.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
FIG. 1 is a schematic diagram showing a rolling mill control device according to an embodiment of the present invention. In FIG. 1, 1 is a steel plate as a plate material to be rolled, 2 is a rolling mill consisting of a pair of upper and lower rolling rolls;
3 is a water cooling device installed near the entrance side of the rolling mill 2 to cool the steel plate 1; 4 is a water cooling device that controls the flow rate of water discharged from the water cooling device 3 to the steel plate 1 in the width direction and length direction of the steel plate 1. The water cooling control device 5 is a cooling pattern calculation device that determines a cooling pattern for each part of the steel plate 1 based on a temperature adjustment signal to be described later and sends the command to the water cooling control device 4 in order to control the temperature distribution of the steel plate 1. , these water cooling devices3. The water cooling control device 4 and the cooling pattern calculation device 5 constitute a plate material temperature adjustment device A.

Further, reference numeral 6 denotes a rolling down mechanism for adjusting the roll gap in the rolling mill 2, and this rolling mechanism 6 is disposed on the operating side and the driving side of the rolling mill 2, respectively. Furthermore, 7 is a lowering control device that drives and controls each lowering mechanism 6, 6;
Reference numeral 8 denotes a roll-down position calculation device that calculates roll-down positions on the operating side and drive side based on a roll-down position control signal to be described later, and outputs the command signal to the roll-down control devices 7, 7.

9 is an infrared camera as a detection device that simultaneously detects planar shape information and temperature distribution information of the steel plate 1 as captured image information; 10 is a planar shape recognition that recognizes the planar shape of the steel plate 1 from the captured image information of the infrared camera 9; device, 11
Similarly, 12 is a temperature distribution recognition device that recognizes the temperature distribution of the steel plate 1 from image information captured by the infrared camera 9, and 12 is a cooperative control device.

This cooperative control device 12 is a planar shape recognition bag for controlling the planar shape and temperature of the steel plate 1 in a coordinated manner. 10 and the recognition results of the temperature distribution recognition device 11, the curvature (camber) of the planar shape of the steel plate 1 and non-uniformity of temperature are analyzed, and the correction amount of the rolling position in the rolling mechanism 6, 6 and the cooling pattern in the water cooling device 3 are determined. and the correction amount as mutually correlated rolling position control signals and temperature adjustment signals, and these signals are output to the rolling position calculation bag M8 and the cooling pattern calculation device 5, respectively.

Next, the operation will be explained. First, the infrared camera 9 images the steel plate 1 at the entrance side of the cooling zone directly below the water cooling device 3, and the captured image information is analyzed. In other words, the planar shape recognition device 10 determines the external contour of the steel plate 1 and While recognizing the planar shape of the entire board, the center line of the board width is calculated in the length direction, and the amount of bending of the same center line is determined as the bending direction and radius of curvature of each part.

Furthermore, the infrared camera 9 uses an optical filter to select the wavelength of infrared rays and capture images.

Since the temperature of each part of the steel plate 1 can be identified, the temperature distribution recognition device 11 analyzes the spectrum of infrared rays included in the captured image information from the infrared camera 9 to recognize the temperature distribution, and the temperature of the steel plate 1 is determined. A map is created.

Then, from the temperature distribution along the curve of the center line in the steel plate 1 recognized by the planar shape recognition device 10 and the temperature distribution recognition device 11, the optimal cooling pattern correction amount and rolling position correction amount are calculated in the cooperative control device 12. ,
These calculation results are sent from the coordination control device 12 to the reduction position calculation device 8 and the cooling pattern calculation device as a reduction position control signal and a temperature adjustment signal that are correlated with each other. 5 respectively.

As a result, the lowering mechanisms 6, 6 are controlled by the lowering control device 7, respectively.
, 7, and the rolling position of the rolling mill 2 is adjusted to control the planar shape of the steel plate 1. At the same time, in coordination with this, the water cooling device 3 is controlled by the water cooling control device 4, and the temperature of the steel plate 1 is adjusted. Since the distribution is adjusted, the rolling temperature of the steel plate 1 is made uniform, the steel plate 1 has a good planar shape without camber, and a product with uniform material quality and high precision can be manufactured.

Furthermore, in this embodiment, since the infrared camera 9 also serves as a device for detecting the planar shape and temperature distribution of the steel plate 1,
The structure is extremely simple compared to a simple combination of conventional devices.

In the above embodiment, the water cooling device 3 is used as the plate material temperature adjustment device, but a heating device that can partially heat the steel plate 1 may be used, or both the heating device and the cooling device may be used. They may be used simultaneously, and the same effects as in the above embodiment can be achieved in these cases as well.

[Effects of the Invention] As described above, according to the present invention, the planar shape and temperature distribution of the rolled plate material are recognized based on the detection results from the same detection device, and the planar shape and temperature distribution of the rolled plate material are determined from each recognition result. Since the configuration is configured to coordinately control the shape and temperature distribution, the rolling temperature of the rolled plate material is made uniform with an extremely simple structure, the rolled plate material has a good planar shape without camber, and the material quality is improved. This has the effect of producing uniform, high-precision products.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a rolling mill control device according to an embodiment of the present invention, Fig. 2 is a block diagram showing a conventional rolling mill control device, and Fig. 3 is a schematic diagram showing another conventional rolling mill control device. It is a diagram. In the figure, 1 - a steel plate as a plate material to be rolled, 2 - a rolling machine, 6 - a rolling mechanism, 9 - an infrared camera as a detection device,
10 One plane shape recognition device, 11 One Temperature distribution recognition device, 1
2-Coordination control device, 8-Plate material temperature adjustment device. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A detection device that includes a rolling mill having a rolling mechanism and a plate temperature adjustment device for cooling or heating the rolled plate material near the rolling mill, and simultaneously detects planar shape information and temperature distribution information of the rolled plate material. , a planar shape recognition device and a temperature distribution recognition device are provided, which respectively recognize the planar shape and temperature distribution of the rolled plate material from the detection results of the detection device, and coordinate the planar shape and temperature of the rolled plate material. In order to perform the control, a mutually correlated rolling position control signal and temperature adjustment signal obtained based on the recognition results of the above-mentioned planar shape recognition device and temperature distribution recognition device are sent to the above-mentioned rolling mechanism and plate temperature adjustment device, respectively. A rolling mill control device characterized by being provided with a coordination control device that outputs output.