KR100785253B1 - Apparatus and method for controlling movement of down kicker - Google Patents

Abstract

An apparatus and a method for controlling movements of down kickers are provided to prevent accidents and operation stopping and improve operation efficiency and safety by performing a checking process of operating the down kicker after checking if a down kicker in front of the down kicker has operated at a time point when a down kicker is operated on a normally-rolled rolling workpiece. As an apparatus for controlling operation of the down kickers with respect to a rolling workpiece that advances into a rolling line(100) in which plural pairs of sensing device(110a-110c) and down kickers(150a-150c) are installed, an apparatus for controlling movements of down kickers comprises: an input part(200) into which advance sensing signals and bent amounts are inputted from the sensing device; and a decision processing part(220) for outputting a corresponding control signal by deciding if a down kicker just in front of the down kicker has completed its operation at a time point when operating a down kicker. The apparatus further comprises an alarm part(240) for generating a warning by a control signal according to the error determination in the decision processing part.

Description

 Apparatus and method for controlling movement of down kicker}

1 is a block diagram illustrating a rolling process of a general intermediate rolling line in which a plurality of sensing means and a down kicker are installed as a pair.

Figure 2 is a block diagram showing the configuration of the down-kicker operation control device configured in the intermediate rolling process according to an embodiment of the present invention.

3 is a flowchart illustrating a method of controlling a down kicker operation according to an embodiment of the present invention in detail.

Description of the main parts of the drawing

100: rolling line 110: detection means

130: rolling stand 150: down kicker

200: input unit 220: judgment processing unit

240: alarm unit 242: buzzer

244: alarm lamp

The present invention relates to an apparatus and method for operating a down kicker in a rolling process, and more particularly, to an apparatus and a method for controlling a down kicker to prevent a malfunction of a plurality of down kickers installed in a rolling line.

The rolling process transfers the semi-finished products produced in continuous casting to hot rolled, thick plate, steel, section steel, and bar mills and reheats them. It is a process of making various shapes by pushing and compressing between two rolls.

Typically, the rolling process consists of a rolling mill, an intermediate mill, and a finishing mill. Rough rolling is an initial process for converting rolled materials such as Billet, Bloom, Beam blank, etc. into product shape, and almost no product shape appears. The intermediate rolling has a shape similar to that of the product, and complete rolling is achieved by passing through finishing rolling.

After rough rolling, the rolled material is cut by a predetermined length by a first cutting machine (NO.1 C / C shear) (not shown), and the process proceeds to the intermediate rolling process. At this time, in the intermediate rolling process, a down-kicker is provided between the rolling stands so that the down-kicker operates on the normally-rolled material when the normally rolled material moves to a predetermined position along the rolling line.

1 is a block diagram illustrating a rolling process of a general intermediate rolling line in which a plurality of sensing means and a down kicker are installed as a pair.

As shown in FIG. 1, when the rolled material is transferred along the rolling line 100 and enters the upper portion of the first sensing means 110a positioned at the front end of the first rolling stand 130a, the first sensing means 110a. ) Confirms the entry of the rolled material (this is defined as a sensing means ON state). When the first sensing means 110a is turned on, the first sensing means 110a generates a constant pulse signal through a pulse generator (not shown). The length of the rolled material entering the first rolling stand 130a through a counter (not shown) is counted up based on the pulse signal. When the length of the rolled material reaches a predetermined value, the first down kicker 150a driven in conjunction with the first sensing means 110a is placed on the upper end of the second sensing means 110b. You will perform a down kick. The first sensing means 110a checks the presence or absence of the rolled material before the rolled material enters the intermediate rolling step (a sensing means is turned on), counts up the length of the rolled material, and when the length reaches a predetermined value. It is possible to drive the first down kicker 150a. In this process, before the first down kicker 150a performs the down kick, the rolled material passing through the first rolling stand 130a to the upper end of the second sensing means 110b is the second sensing means 110b. Entry is confirmed by). The length of the rolled material is counted up. After the operation of the first down kicker 150a, the second sensing means 110b located at the lower end of the first down kicker 150a may return the loop amount of the compressed combustion material refracted by the down kick of the first down kicker 150a. The amount of curvature) and count up the length of the rolled material entering the second rolling stand 130b and when the length reaches a predetermined value, the second down kicker 150b downkicks the rolled material. To be able to perform In this case, like the second sensing means 110b, the third sensing means 110c checks the entry of the rolled material entering through the second rolling stand 130b and counts up the length. Subsequently, after the down kick is performed, the third sensing means 110c positioned at the bottom of the second down kicker 150b detects the loop amount (curvature amount) of the rolled material and enters the third rolling stand 130c. When the distance of the rolled material is counted up, when the distance reaches a predetermined value, the third down kicker 150c driven in conjunction with the third sensing means 110c operates on the rolled material. Thereafter, the sensing means 110 and the down kicker 150 also operate in the above-described manner.

By the way, the sensing means 110 for detecting the entry of the rolled material is to operate as an optical sensor using the light energy, it is affected by the external environment. For example, when used not only indoors but also in exposed areas such as outdoors, light or external light (natural light) from field workers' flashes, and materials or objects that scatter and reflect light such as fog, snow, moisture, dust, paint, etc. For example, the entry of the rolled material may not be properly confirmed.

When the detection means 110 using the optical sensor principle is malfunctioned as described above, the down kicker 150 operating in such a manner is operated early, causing a roll of miss that the rolled materials overlap. In other words, if the front end of the detection means 110 is malfunctioning, there is a case in which the down-kicker 150 of the rear end associated with this occurs early operation, accordingly, the rolled material is moved to the rear end along the rolling line 100 There is a problem in that the miss roll that collides with the pre-operated down kicker 150 or the rolled materials overlap. In addition, due to the premature operation of the down kicker 150, there is a risk that the rolling line 100 may be damaged or the rolled material may leave the rolling line 100 and hit the worker.

The present invention has been proposed to solve the above-described problems, by going through a confirmation process to operate the down-kicker located at the front end immediately after the operation of any down-kicker on a normal rolled rolled material It is possible to prevent the misroll. In addition, it is an object of the present invention to provide a down-kicker control device and method for preventing accidents and shutdowns that can occur during the conventional rolling process and to increase the operation efficiency and safety.

The present invention for solving the above problems, the control unit to determine whether the operation of the down kicker of the front end immediately at the time to operate the input unit and the down kicker receives the input material and the amount of rolling material input detection signal from the sensing means And a decision processing unit for outputting a signal.

Preferably, the determination processing unit determines that the down kicker of the previous stage is completed when the curvature of the rolled material is a predetermined normal value at the time of operating any one of the plurality of down kickers. Can be operated.

The apparatus may further include an alarm unit configured to alert an alarm based on a control signal according to an error determination in the determination processor.

In addition, the alarm unit may be configured as an alarm lamp or a buzzer.

On the other hand, the down-kicker operation control method according to the present invention comprises a first step of determining by the determination processor whether the down-kicker of the front end has completed the operation immediately at which time the down-kicker to operate; And a second step of operating the one of the down kickers when the down kicker of the previous stage has completed the operation immediately at the time of operating any one of the down kickers.

In addition, the determination processing unit may further include an alarm step of generating an alarm through the alarm unit, if the down-kicker of the front end does not operate immediately at the time of operating any one of the down-kickers.

In addition, the alarm step, it can be alarmed through the alarm lamp or buzzer.

The present invention made as described above will be described in detail with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, the same reference numerals are given to the same parts as in the prior art, and detailed description thereof will be omitted.

Figure 2 is a block diagram showing the configuration of the down-kicker operation control device configured in the intermediate rolling process according to an embodiment of the present invention.

First, the first detection for detecting the rolling material is placed in the front end of the first rolling stand (130a) of the intermediate rolling process in the control device for the operation of the down kicker 150 according to an embodiment of the present invention The means 110a may use a hot metal detector (HMD) or a hot metal position detector (HMPD) according to a user's selection. However, hereinafter, the sensing means used in the description of the present invention is to use HMPD.

As shown in FIG. 2, the apparatus for controlling a down kicker according to the present invention includes a sensing unit 110, an input unit 200, a determination processing unit 220, and an alarm unit 240.

The sensing means 110 is generally used a hot metal position detector (HMPD). The sensing means 110 detects the entry of the rolled material that is normally rolled and enters the intermediate rolling process, and counts up the length of the rolled material when the entry is detected. After the down kick is performed by the down kicker 150, the bending amount of the rolled material is sensed and output.

The input unit 200 receives an input detection signal from the sensing unit and outputs the input detection signal to the determination processing unit 220. In addition, the bending amount (loop amount) of the rolled material detected by the sensing means 110 is received and output to the determination processing unit 220.

The determination processor 220 determines whether the down kicker 150 is completed on the basis of the curvature amount (loop amount) of the rolled material detected by the sensing means 110, and the curvature amount of the rolled material is set to a predetermined normal value. If not applicable to form an interlock by outputting an interlock signal to prohibit the downkick operation of the down kicker 150 for the protection of the rolling machine or the safety of the operator. In addition, if the amount of curvature of the rolled material does not correspond to a predetermined normal value, the alarm manager outputs an alarm signal and generates an alarm using a buzzer 242 or an alarm lamp 244 to manage and monitor the rolling line 100. Detects an error of the down kicker 150 and can perform an action thereto.

On the other hand, when the amount of curvature of the rolled material corresponds to a predetermined normal value, the determination processing unit 220 outputs a drive signal to the down-kicker 150 so that the down-kicker 150 may perform a down kick on the rolled material. Will be. Accordingly, at the time when the down kicker 150 corresponding to the signal is operated, the down kicker 150 of the next stage may operate only when the down kicker 150 immediately before the operation is completed.

When the amount of curvature of the rolled material does not correspond to a preset normal value, the alarm unit 240 receives an alarm generation signal from the determination processing unit 220 to perform an alarm through the buzzer 242 or the alarm lamp 244. The alarm unit 240 may be attached to the cab (not shown) or the intermediate rolling line for managing and monitoring the rolling process, and to draw the attention of the driver or user to the rolling line due to malfunction of the down kicker 150 ( It is possible to take quick action against the problem of 100).

In the embodiment of the present invention, the input unit 200 is shown and described as a different component from the determination processing unit 220, but in the modification of the embodiment, the input unit 200 is included in the determination processing unit 220 internally, The decision processing unit 220 may have a connection relationship with the decision processing unit 220.

3 is a flowchart illustrating a method of controlling a down kicker operation according to an embodiment of the present invention in detail.

First, the same reference numerals are used for the same configurations as in the prior art, and repeated descriptions are omitted.

Automatic operation of the intermediate rolling mill is started, the first detecting means (110a) starts to check the entry of the rolled material (S10). When the rolled material is detected, the first sensing unit 110a is turned on and starts counting up the length of the rolled material (S12). By counting up the length of the rolled material, the rolled material passes through the first rolling stand 130a and moves to the upper end of the second sensing means 110b so that the first down kicker 150a can perform the down kick. It is determined whether or not the position (S14). When it is determined that the length of the rolled material is a certain length and the first down kicker 150a is in a position to perform the down kick, the determination processor 220 drives the first driving unit in connection with the first sensing unit 110a. The driving signal is output to the down kicker 150a to drive the first down kicker 150a (S18). In this process, before the first down kicker 150a performs the down kick, the rolled material passing through the first rolling stand 150a to the upper end of the second sensing means 110b is the second sensing means 110b. Entry is confirmed by). The second sensing means (110b) is to count up the length of the rolled material (S16). After the first down kicker 150a is driven to the rolled material, the second sensing unit 110b measures the curvature amount (loop amount) of the rolled material (S20). The measured amount of curvature is input to the determination processing unit 220 through the input unit 200 and used as a means for determining whether the down kicker 150 has performed a down kick through comparison with a predetermined normal value. The length of the rolled material is counted up by the second sensing means 110b, so that the rolled material passes through the second rolling stand 130b and moves to the upper end of the third sensing means 110c, and thus the second down kicker 150b. It is determined whether is in the position to perform the down kick (S22). If the length of the rolled material is a certain length and the second down kicker 150b is determined to be in the position to perform the down kick, the determination processing unit 220 and the amount of curvature measured by the second sensing means (110b) The preset normal value is compared (S24). As a result of the comparison, when the measured curvature amount does not correspond to a predetermined normal value, the determination processor 220 determines that the first down kicker 110a has not performed the down kick and forms an inter lock (I / L). Done. In addition, the alarm generation signal is output to the alarm unit 240 to generate an alarm using the buzzer 242 or the alarm lamp 244 (S26). Thus, the manager who monitors and manages the rolling line 100 can recognize the current error occurrence situation of the rolling process and take action accordingly. (S28)

As a result of the comparison, when the measured amount of curvature corresponds to a normal value, the determination processor 220 determines that the first down kicker 150a performs the down kick, and outputs a driving signal to the second down kicker 150b to output the second signal. The down kicker 150b is driven (S32). In this process, before the second down kicker 150b performs the down kick, the rolled material passing through the second rolling stand 130b to the upper end of the third sensing means 110c is the third sensing means 110c. Is confirmed by). The third sensing means 110c counts up the length of the rolled material (S30). After the second down kicker 150b is driven to the rolled material, the third sensing means 110c measures the curvature amount (loop amount) of the rolled material (S34). The length of the rolled material is counted up by the second sensing means 110b, so that the rolled material passes through the second rolling stand 130b and moves to the upper end of the third sensing means 110c, and thus the second down kicker 150b. It is determined whether is in the position to perform the down kick (S36). If it is determined that the length of the rolled material is a predetermined length and the second down kicker is in a position to perform the down kick, the determination processor 220 determines the curvature measured by the third sensing means 110c and a predetermined normal value. It is compared (S38). As a result of the comparison, when the measured curvature amount does not correspond to a predetermined normal value, the determination processor 220 determines that the second down kicker 150b has not performed a down kick and forms an inter lock (I / L). Done. In addition, the alarm generation signal is output to the alarm unit 240 to generate an alarm using the buzzer 242 or the alarm lamp 244 (S40). The manager who monitors and manages the rolling line 100 through the alarm recognizes a current error occurrence state of the rolling process and takes action accordingly (S42). As a result of the comparison, if the measured curvature amount corresponds to a preset normal value, the determination processor 220 determines that the second down kicker 150b performs the down kick, and outputs a driving signal to the third down kicker 150c. The third down kicker 150c is driven (S46). In this process, the rolled material entering the upper end of the fourth sensing means 110d after passing through the third rolling stand 130c before the third down kicker 150c performs the down kick is performed by the third sensing means 110c. Entry is confirmed by). The fourth detecting means (110d) is to count up the length of the rolled material (S44). After the third down kicker 150c is driven to the rolled material, the fourth sensing means 110d measures the curvature amount (loop amount) of the rolled material (S48). The length of the rolled material is counted up by the third sensing means 110c, and the rolled material passes through the third rolling stand 130c to move to the upper end of the fourth sensing means 110d, and thus the third down kicker 150c. It is determined whether is in the position to perform the down kick (S50). Subsequent sensing means and down kickers also operate in the manner described above. Therefore, in the exemplary embodiment of the present invention, only the process of performing the down kick by the third down kicker 150c has been described. However, even when the down kicker is added, the operation of the down kicker may be controlled through the above-described process. .

The interlock (I / L) is operated by the down-kicker 150 of the next stage for the protection of the device or the safety of the operator until the determination processor 220 determines that the down-kicker 150 of the front end has performed the operation. It is a state that is not to be fulfilled. The method of providing the interlock is well known in the art, and a person skilled in the art can easily derive from the present specification.

As mentioned above, although the preferred embodiment of this invention was shown and described, this invention is not limited to the specific embodiment mentioned above, Usually, in the technical field to which this invention pertains without deviating from the summary of this invention claimed in a claim. Various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or the prospect of the present invention.

As described above, according to the operation control method and method of the down-kicker according to the present invention, it is determined whether the down-kicker of the front end is operated at the time of the down-kicker operation. By forming an interlock on the down kicker, it is possible to prevent the down liner from operating early due to a malfunction of the sensing means and to prevent the production line from being damaged or causing injury. Therefore, it is possible to solve the problems occurring in the field, such as damage and damage to the production line, it is possible to improve the production efficiency of the operator.

Claims (7)

An apparatus for controlling the operation of the plurality of down kicker with respect to the rolling material entering the rolling line installed a plurality of sensing means and the down kicker, An input unit for receiving a rolled material entry detection signal and a curvature amount from the sensing means; And And a determination processing unit for determining whether the down-kicker is completed at the time of operating the down-kicker and outputting a control signal corresponding thereto. The method according to claim 1, The determination processing unit judges that the down-kicker of the front end is operated and operates one of the down-kickers if the curvature of the rolled material is a predetermined normal value at the time of operating any one of the down-kickers. Down kicker motion control device characterized in that. The method according to claim 1 or 2, And an alarm unit for alarming by a control signal according to an error determination in the decision processing unit. The method according to claim 3, And the alarm unit comprises an alarm lamp or a buzzer. As a method for controlling the operation of the plurality of down kicker with respect to the rolling material entering the rolling line installed a plurality of sensing means and the down kicker, A first step of determining, by the determination processing unit, whether the down-kicker of the previous stage has completed the operation at the time when the down-kicker is operated; And And a second step of operating any one of the down kickers if the decision processing unit has completed the operation immediately before the operation of any one of the down kickers. The method according to claim 5, And determining, by the processing unit, an alarm step of generating an alarm through the alarm unit, if the down-kicker of the front end is not operated immediately at the time of operating any one of the down-kickers. The method according to claim 6, The alarming step, characterized in that the alarm via the alarm lamp or buzzer operation control method.

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