KR101224985B1

KR101224985B1 - Device for controlling loading of materials in hot-rolling process and method therefor

Info

Publication number: KR101224985B1
Application number: KR1020100119474A
Authority: KR
Inventors: 최석윤
Original assignee: 현대제철 주식회사
Priority date: 2010-11-29
Filing date: 2010-11-29
Publication date: 2013-01-22
Also published as: KR20120057914A

Abstract

The present invention relates to a hot rolled material entry control device and a method which does not perform a malfunction processing when a material enters the rolling mill through the side guide in the hot rolling process, and is installed at the front end of the rolling mill through a table roller. The step of entering the material into the side guide, if the abnormality in the entry of the material, the step of turning off the material sensor located on the table roller, and, if the material sensor is off, the side of the guide and the rolling mill After the operation mode is changed to the manual mode and changed back to the automatic mode, and according to the automatic mode, the controller initializes the various devices including the side guide and the rolling mill to the initial position, and when the material sensor is turned on, The controller operates to allow the material on the table rollers to roll back into the side guides and roll. It provides the steps:

Description

DEVICE FOR CONTROLLING LOADING OF MATERIALS IN HOT-ROLLING PROCESS AND METHOD THEREFOR}

The present invention relates to a hot rolling process, and more particularly, to a hot rolled material entry control apparatus and a method of performing a malfunction when an abnormality occurs in a material entering the rolling mill through a side guide in the hot rolling process.

In general, in order to produce a rolled material in a steel mill, a rolling process is performed. The rolling process is performed between two rotating rolls of materials such as beam blanks, blooms, billets, slabs, etc., produced in a continuous casting process. It is a process of producing a finished product of the desired shape.

The rolling mill is a device for forming a shaped steel, a plate, a bar, etc. through plastic deformation of a material while passing a high temperature material between rolls rotating at room temperature or high temperature. A conveyance guide is provided between the rolling mill and the rolling mill to feed the rolling mill to the rolling mill in the next step.

When the steel is produced in the rolling mill, the steel is continuously produced through the straightening and cooling process, which is cut and loaded and stored to a certain length.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hot rolling material entry control device and a method for automatically reentering without malfunctioning when an abnormality occurs in a raw material entering a rolling mill through a side guide in a hot rolling process.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular embodiments that are described. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, There will be.

Hot rolling material entry control method of the present invention for realizing the above object, the step of entering the material into the side guide installed in the front end of the rolling mill through the table roller; If an abnormality occurs in the entry of the material, turning off the material sensor located on the table roller; Changing the operation mode of the side guide and the rolling mill to the manual mode when the material detecting sensor is off and then to the automatic mode again; In response to the change of the automatic mode, the controller initializing all the devices including the side guide and the rolling mill to an initial position; And when the material detecting sensor is turned on, the controller drives the material on the table roller to enter the side guide again.

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As described above, according to the present invention, when abnormality occurs in the material entering the rolling mill through the side guide in the hot rolling process, the recovery rate of the product is increased due to the reduced occurrence of malfunctions by automatically re-entering without malfunction processing, In the event of a malfunction, there is an advantage to minimize the occurrence of malfunction processing time.

1 is a view showing a hot rolling mill and a material entry control apparatus according to an embodiment of the present invention.
2 is a flow chart showing the operating process of Figure 1 according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like elements in the figures are denoted by the same reference numerals wherever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a view showing the hot rolling mill 50 and the raw material 1 entry control apparatus according to an embodiment of the present invention, the table roller 10, the side guide 30, the rolling mill 50, the material sensor 110 ), The sensor switch 130, the mode selection unit 150 and the controller 170 is made.

The table roller 10 transfers the hot rolling material 1 introduced from the outside to the rolling mill 50 through the side guide 30.

The side guides 30 are arranged on both sides of the table roller 10 in front of the rolling mill 50 to guide the position of the raw material 1 entering the rolling mill 50.

The rolling mill 50 includes at least one or more rolling rolls 51 to 55 for hot rolling the raw material 1 introduced through the side guide 30 into a shape according to a standard through a plurality of rolling rolls. It is composed. Here, in order to improve the efficiency of hot rolling, since the raw material 1 is repeatedly reciprocated through the rolling mill 50 several times, the position of the raw material 1 is adjusted by the side guide 30 according to a process sequence. When the material 1 passes through the rolling mill 50 once, it is referred to as one pass, and the material may be passed several times or repeatedly as necessary. Here, the rolling mill 50 performs an intermediate universal mill (UR; 51) for rolling the material, an edge mill (E) 53 for performing edging rolling of the material, and rolling for erecting flanges on both sides of the material. May include a finish universal mill (UF) 55. Of course, a rolling roll for primarily rolling the material 1 at the front end of the rolling mill 50 may be further provided.

The product molded through the rolling mill may be a section steel, in particular an H section steel. In this case, the intermediate universal mill (UR; 51) performs the H-shaped steel rolling of the material, the edge mill (E; 53) performs the edging rolling of the H-shaped steel, and the finish universal mill (UF; 55) is the H-shaped steel. Rolling is performed to erect the flanges on both sides of the.

The material detecting sensor 110 is disposed on the table roller 10 that is the front end of the side guide 30 to detect the presence or absence of the material 1 on the table roller 10.

The sensor switch 130 turns on / off the operation of the material detecting sensor 110 according to an external input when the material 1 enters the side guide 30.

The mode selector 150 selects the operation of the various devices including the side guide 30 and the rolling mill 50 in the automatic mode or the manual mode according to an external input.

The controller 170 is changed from the manual mode to the automatic mode again through the mode selection unit 150 after the material detection sensor 110 is turned off through the sensor switch 130 and the side guide 30 and the rolling mill ( A device such as a programmable logic controller (PLC) which initializes various devices including the 50 and controls the material 1 on the table roller 10 to reenter the side guide 30 when the sensor switch 130 is turned on. Consists of Here, when the controller 170 detects the workpiece 1 through the workpiece sensor 110 in the automatic mode, the workpiece 1 on the table roller 10 is transferred to the rolling mill 50 through the side guide 30. Control to supply.

Hot rolling is to complete the product by rolling the material (1) in the shape according to the standard through a plurality of rolling rolls 80, the side guide (to adjust the position of the material (1) entering the rolling mill 50) 30), and corrects the position of the material 1 to be conveyed through the table roller 10 or the like from the preceding process. It is necessary to adjust the position of the raw material 1 according to the process order because the raw material 1 is repeatedly rolled several times in order to increase the efficiency of hot rolling.

As shown in the drawing, the controller 170 controls the side guides 30 provided at the front and rear ends of the rolling mill 50 to correct the position of the material 1.

In general, when the raw material 1 does not enter through the side guide 30 due to an indentation abnormality in the automatic driving mode state when the material enters the side guide 30 side, the operation mode is manually switched and then treated as a malfunction. Here, if the raw material 1 is caught in the side guide 30 under the condition of which the cause is unknown, a situation in which the raw material 1 may be malfunctioned due to the temperature drop of the raw material 1 to be rolled during the tracking of the cause occurs. In general, the surface temperature of the material 1 supplied to the hot rolling mill 50 is about 1000 ° C. or more, and when the temperature is below a predetermined temperature, hot rolling may not be performed.

Therefore, in the present invention, when the material entering abnormality, the material sensing sensor 110 in the state that the material 1 is present in the table roller 10, and then off the hydraulic cylinder 25 or the rolling mill ( By controlling the respective motors 41, 43, and 45 of 50 to initialize the various devices including the side guide 30 and the rolling mill 50 to perform a restart, malfunctions can be overcome.

2 is a flow chart showing the operating process of Figure 1 according to the present invention.

First, the raw material 1 heated to a temperature required for hot rolling through a heating device (not shown) is first rolled and then transferred to the rolling mill 50 through the table roller 10 (S1). The surface temperature of the raw material 1 conveyed to the rolling mill 50 becomes about 1000 degreeC or more.

Here, when the material 1 is transferred to the side guide 30 through the table roller 10, the controller 170 detects the entry of the material 1 through the material detection sensor 110, and detects the material 1 The side guide 30 and the rolling mill 50, etc. are initialized to a preset position to prepare an automatic driving mode.

The raw material 1 transferred to the rolling mill 50 through the table roller 10 is corrected in position by the side guide 30 to enter the rolling mill 50, and the raw material 1 entered into the rolling mill 50 is Hot rolling is carried out to the shape according to the specification through the rolling mill 50 (S2, S3). Here, in order to improve the efficiency of hot rolling, since the raw material 1 is repeatedly reciprocated through the rolling mill 50 several times, the position of the raw material 1 is adjusted by the side guide 30 according to a process sequence. The rolling mill 50 performs an intermediate universal mill (UR) for rolling the shaped steel (H-shaped steel, etc.), an edge mill (E) for performing edging rolling, and performs H-shaped rolling to erect flanges on both sides of the shaped steel. Finish universal mill (UF).

Meanwhile, a situation in which the material 1 does not enter through the side guide 30 may occur due to an abnormal entry when the material enters the side guide 30 in the automatic driving mode (S2). In this way, when an abnormality occurs in the entry of the raw material 1 and the 1 pass is also prevented, the sensor switch 130 is turned off to turn off the material detecting sensor 110 located on the table roller 10 ( S4). When the material detecting sensor 110 is turned off, the controller 170 may not recognize whether or not the material 1 is introduced (existence).

When the material detecting sensor 110 is turned off, after changing the operation mode of the side guide 30 and the rolling mill 50 to the manual mode through the mode selection unit 150 (S5). Here, the rolling mill 50 is possible in principle only in the automatic operation mode, and automatic restart is not possible if the raw material 1 exists in the table roller 10 when the manual mode is switched before the 1 pass rolling. That is, automatic restart is possible only in a state in which the material 1 is not present in the table roller 10.

When the mode selection unit 150 is changed from the automatic mode to the manual mode, the controller 170 includes the hydraulic cylinder 25 of the side guide 30 and each motor 41 to 45 of the rolling mill 50. After the device is controlled and initialized to the initial position, automatic restart is performed (S6). Here, since the material detecting sensor 110 is turned off by the sensor switch 130, the controller 170 may initialize the general apparatus.

Subsequently, when the sensor switch 130 is turned on according to an external input, the controller detects the material 1 through the material detection sensor 110 (S7), and accordingly, the controller 170 moves the material on the table roller 10. Driving (1) to enter the side guide 30 again to roll the material (1) normally (S8).

The sensor switch 130 and the mode selector 150 applied to the present invention may be arbitrarily selected by the user, but the sensor switch 130 and the mode selector 150 according to the control algorithm of the controller 170 at the time of entering the material. Of course) may be configured to be electrically switched and controlled automatically. Here, the entry into the material can be recognized through whether the material moves.

Therefore, in the present invention, when the entry of the material 1 into the side guide 30, the material detecting sensor 110 is turned off, and then the side guide 30 and the rolling mill 50 are initialized to restart the rolling system. By simply solving the impossibility of the entry of the material (1) due to the malfunction of, the recovery rate due to the reduction of the occurrence of malfunction is increased, it is possible to minimize the malfunction processing time in the event of a malfunction.

The present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

1: Material 10: Table Roller
30: side guide 50: rolling mill
110: material detection sensor 130: sensor switch
150: mode selector 170: controller

Claims

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Entering the material into the side guide installed at the front end of the rolling mill through the table roller;
If an abnormality occurs in the entry of the material, turning off the material sensor located on the table roller;
When the material detecting sensor is turned off, the operation mode of the side guide and the rolling mill is changed to the manual mode and then changed back to the automatic mode;
The controller initializes all the apparatus including the side guide and the rolling mill to an initial position according to the automatic mode; And
And when the material detecting sensor is turned on, driving the controller so that the material on the table roller is rolled back into the side guide and rolled.

The method according to claim 5,
The controller is a hot rolled material entry control method for controlling the raw material on the table roller to enter the rolling mill through the side guide when the material is detected through the material sensor in the automatic mode.