KR100879883B1 - Method for controlling buckle of the strip and the apparatus - Google Patents

Abstract

The present invention relates to a method and apparatus for automatically controlling the rolling of a plating rolling apparatus by detecting a buckle generated on a strip, and calculating a difference between a measured value transmitted from a shear buckle detection sensor and a measured value with a set value of the buckle. A shear buckle detection decision unit for sending the result of the comparison decision process of occurrence to the comparison decision unit and the distance measurement operation unit; A rear end buckle detection decision unit which calculates the difference between the measured value transmitted from the rear end buckle detection sensor and the set value and sends the result to the comparison decision unit after the comparison determination process of buckle occurrence; Calculate the difference between the set value (fixed distance between the shear buckle sensor and the rolling roll) and the detected value (buckle moving distance from the speed detector) after calculating the distance by the speed detector based on the signal transmitted from the shear buckle detection and determining unit A distance measurement operation unit performing a comparison determination process and sending the result to the comparison determination unit; When the buckle occurrence is determined according to the signal transmitted from the front buckle detection and the distance measurement operation unit, the signal is transmitted to the hydraulic control control unit to automatically open the plating rolling device, and according to the signal transmitted from the rear buckle detection unit A comparison judging part which transmits a signal to the hydraulic control control part and automatically closes the plating rolling device when it is determined that the buckle part has passed all of the plating rolling device; The buckle control device of the plating rolling device consisting of a gist.

Plating Rolling Equipment, Buckles, Control

Description

Method and device for controlling buckle of plating rolling equipment {method for controlling buckle of the strip and the apparatus}

1 is a block diagram of a general plating rolling apparatus according to the prior art.

Figure 2 is an overall configuration of the plating rolling apparatus according to the present invention.

3 is a block diagram of a buckle detection device according to the present invention.

Figure 4 is a rolling roll progress status according to the present invention.

5 is a flowchart illustrating a buckle generation signal control unit according to the present invention.

(Short description of the main reference numerals)

1: strip

2: Tension Roll Bridging Roll Shear Tension Roll Roll

3: plating rolling device

4: hydraulic control control unit

5: program logic control unit

6: Tension bridle roll after plating rolling device

7: plating rolling device shear buckle detection sensor

8: Buckle detection sensor at the back of the rolling mill

9: speed detection device                 

10: shear buckle detection sensor control unit

11: shear buckle detection judgment part

12: distance measurement calculation unit

13: rear buckle detection sensor control unit

14: rear buckle detection unit

The present invention relates to a buckle control method and apparatus of a plating rolling device, and more particularly, to provide a buckle detection sensor in a plating rolling device, which is installed in a plating factory to impart a shape and extension to the surface of a strip to improve product quality. A method and apparatus for automatically controlling rolling of a plating rolling apparatus by detecting a buckle generated in a use strip.

1 shows a schematic configuration diagram of a general plating rolling apparatus, which will be described below with reference to FIG. 1. As shown in the figure, a strip supplied to a plating factory is usually subjected to a heat treatment, a galvanizing process and passed through a plating rolling apparatus to make a final product. At this time, during the heat treatment and plating process, there is a case that the buckle occurs in the strip 1 depending on the working conditions, and the buckle generating part passes through the roll of the plating rolling apparatus. There is a problem that tearing occurs to replace the roll or a long pause occurs.                         

Therefore, in order to prevent such a problem, the user checks directly with the user's eyes when the buckle portion of the strip 1 arrives and manually opens the roll of the plating rolling apparatus 3 to prevent roll damage and tearing of the strip. When all the strip buckle passes, the user's eyes are checked again, and the roll of the plating rolling device 3 is closed to perform a cumbersome operation such as rolling the strip 1. This is because there is no device that can detect the buckle automatically when the buckle occurs in the strip and only rely on checking with the user's eyes.

The present invention has been made to solve the conventional problems as described above, by measuring the buckle portion generated in the strip and automatically open or close the roll of the plating rolling device accordingly to damage the roll and the strip An object of the present invention is to provide a buckle control method and a device of a plating rolling device, which prevents tearing and prevents a plant stop.

In order to achieve the above object, the present invention, in the method for automatically controlling the rolling of the plating rolling device by detecting the buckle generated in the strip, by measuring the buckle of the strip through the shear buckle detection sensor to determine the presence or absence of the buckle A first step of transmitting a buckle generation signal; A second step of receiving the buckle generation signal and calculating the opening time of the roll of the plating rolling apparatus through distance calculation by a speed detector; A third step of sending a signal from the program logic controller to the hydraulic control controller to substantially open the plating rolling apparatus and stop rolling according to the opening time; Provided the buckle control method of the plating rolling device comprising a fourth step of measuring the buckle of the strip through the rear buckle detection sensor of the plating rolling device and closing the roll of the plating rolling device to perform rolling when the buckle generation part is completely out. do.

In addition, the present invention is a device for automatically controlling the rolling of the plating rolling device by detecting the buckle generated on the strip, the buckle is generated by calculating the difference between the measured value transmitted from the shear buckle detection sensor and the measured voltage with the set value Shear buckle detection decision to send the comparison judgment and the comparison judgment and the distance measurement operation unit after the; A rear end buckle detection decision unit which calculates the difference between the measured value transmitted from the rear end buckle detection sensor and the set value and sends the result to the comparison decision unit after the comparison determination process of buckle occurrence; Calculate the difference between the set value (fixed distance between the shear buckle sensor and the rolling roll) and the detected value (buckle moving distance from the speed detector) after calculating the distance by the speed detector based on the signal transmitted from the shear buckle detection and determining unit A distance measurement operation unit performing a comparison determination process and sending the result to the comparison determination unit; When the buckle occurrence is determined according to the signal transmitted from the front buckle detection and the distance measurement operation unit, the signal is transmitted to the hydraulic control control unit to automatically open the plating rolling device, and according to the signal transmitted from the rear buckle detection unit A comparison judging part which transmits a signal to the hydraulic control control part and automatically closes the plating rolling device when it is determined that the buckle part has passed all of the plating rolling device; Provides a buckle control consisting of.

In the present invention, it is preferable to further include a delay timer means for preventing the instantaneous closing of the roll of the plating rolling apparatus when there is a settlement portion in the middle of the buckle generation portion.

In the present invention, the distance calculation in the distance measurement operation unit is calculated through the following equation.

L = {Ls-(P * 3.14 * Dia / Gr)}

(L; Roll open distance (M) of plated rolling device, Ls; Set distance (M) between plated rolling device and shear buckle detection sensor, P; Value fed back from speed detector (pulse), Dia; Roll diameter (M) ), Gr; gear ratio associated with the roll)

Hereinafter, a method of controlling the plating rolling apparatus with respect to the buckle generated in the strip according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an overall configuration diagram for automatically controlling the plating rolling apparatus 3 with respect to the buckle generated in the strip according to an embodiment of the present invention. As shown in FIG. At the time of automatic control of rolling stop of the device, the value detected by the principle of the buckle detection detailed configuration shown in FIG. 3 from the shear buckle detection sensor 7 to the buckle detection sensor control unit 10 and the buckle detection determination unit 11. To determine the occurrence of the buckle, and to send a signal for the result to the program logic control unit 5 and the distance measurement operation unit 12 to be applied to the open time distance calculation of the rolling mill 3 roll and the hydraulic control control unit 4. This ensures smooth automatic control of the strip (1) buckle generation, and the buckle part generated completely passes through the plating rolling device, and the back buckle inspection when the plating rolling device is used again. The sensor 8 sends the value detected by the principle of the buckle detection detail shown in FIG. 3 to the buckle sensor control unit 13 and the buckle detection judging unit 14 to determine that there is no buckle, and sends this signal to the program logic. By rolling to the control part 5, it is comprised so that rolling of the plating rolling apparatus 3 roll may be performed automatically via the hydraulic control control part 4. As shown in FIG.

Figure 3 shows a block diagram of a buckle detection device according to the present invention.

As shown in Fig. 3, light is emitted from the laser 1,2 diodes attached to the transmitter and a voltage output of 0.1 V is obtained for a height change of 0.1 mm depending on the amount of light reflected by the detection object (strip). It is a commercially available laser sensor whose output voltage ranges from 0V to 10V. Using this principle, the strip (detection object) used in the plating factory is used from 0.4mm to 2.3mm, so if you set the offset value in the microcomputer section at 0.1V per 0.1mm thickness, the output section will be at least 0.4V. The output voltage is obtained according to the thickness of 2.3V. Therefore, set the buckle judgment value as 0.2V ~ 2.5V considering the tolerance ± 5% (± 0.2V). When the buckle occurs, the amount of light reflected by the reflective object (strip) is diffusely reflected, so the value is greater than the set value of the buckle judgment (0.2V ~ 2.5V), and the buckle at the shear buckle judgment part according to this output value. The occurrence will be judged. In addition, when the output voltage is within 0.2V ~ 2.5V, the rear buckle judging unit determines that the buckle generating part has completely passed the plating rolling device.

Figure 4 is a rolling roll progress diagram according to the present invention, Figure 5 is a flow chart showing a buckle generation signal control unit according to the present invention.

As shown in FIG. 4, the detection of the buckle generation part in the front end buckle sensor is described in detail in the front end buckle detection part of FIG. 5 when the buckle part arrives at the front end buckle detection sensor 7. Using the principle of the configuration diagram, the detected value transmitted from the shear buckle detection sensor of FIG. 2 is set in step 30 (voltage per material thickness and 0.4 to 2.3 V) and the detected value (actual voltage for the buckle coming from the shear buckle detection sensor). Difference is calculated and the comparison judgment processing for the buckle occurrence (difference <ZERO) is performed in step 31 and sent to the comparison determination unit and the distance measurement operation unit.

In the operation of entering the rolling device of the buckle generating unit and stopping the rolling of the roll, when the distance measuring operation unit of FIG. 5 receives the signal in step 31, the distance value transmitted from the speed detecting device 9 of FIG. In step 33, the difference between the set value (fixed distance between the shear buckle sensor and the rolling roll) and the detected value (the buckle movement distance coming from the speed detecting device) is calculated, and in step 34, the comparison judgment processing (difference ≤ zero) is performed to the comparison judgment part. send.

The distance calculation method of the detected value is performed by the following equation.

『Equation-1』

 L = {Ls-(P * 3.14 * Dia / Gr)}

  -L: Rolling distance of plating rolling device (M)

  -Ls: Set distance (M) between plating rolling device and shear buckle detection sensor (7)

  -P: Value fed back from the speed detector (9) (PULSE)

  Dia: Roll diameter (M) of tension bridle roll (6)

  -Gr: Gear ratio connected with tension bridle roll (6)

In step 37, the comparison decision unit combines the signals sent from steps 31 and 34 in step 37 to finally determine the occurrence of buckle upon satisfaction, and transmits the signal to the hydraulic control controller 4 of FIG. It is a control method to automatically stop the rolling of the plating rolling equipment.

In addition, in the case of progress 3 of FIG. 4, if there is a normal part in the middle of the buckle occurrence part, a delay timer setting function is performed at step 40 in the comparative determination part of FIG. It was made to protect.

When the buckle portion generated in the strip 1 passes completely through the plating rolling apparatus and the reuse of the plate rolling apparatus roll is used again, the shear buckle detection portion of FIG. 5 is set in step 30 as shown in FIG. 4. Calculate the difference between (voltage of each material thickness 0.4 ~ 2.3V) and the detected value (actual voltage for the buckle coming from the shear buckle detection sensor) and perform the comparative judgment process (buckle <ZERO) on the buckle occurrence in step 31. The detection value sent to the comparison judging unit and the distance measuring operation unit and transmitted from the rear end buckle detection sensor 8 of FIG. 2 to the rear end buckle detection board in step 35 is detected with the set value (voltage for each material thickness: 0.4 to 2.3 V). The difference between the values (actual voltage for the buckle coming from the rear buckle detection sensor) is calculated and the comparison judgment processing for buckle occurrence (step <ZERO) is sent to the comparison judging unit in step 36. When the signals sent from the steps 31, 36, and 40 are all combined, it is finally determined that the buckle portion generated in the strip has passed through the plating rolling apparatus when all the signals are satisfied, and the signal is received in step 41 after the delay setting time of step 40. It is a control method for transmitting to the hydraulic control control unit 4 of FIG. 2 to automatically close the plating rolling device and perform rolling.

As described above, according to the present invention, the plating rolling device buckle control method measures the buckle portion by using a laser sensor with respect to the buckle portion generated in the supplied strip and automatically controls the rolling of the plating rolling apparatus. There is an advantage that it is possible to prevent the equipment damage by preventing roll damage and tearing of the strip.

The technical idea of the plating rolling apparatus control method of the present invention has been described above with the accompanying drawings, but this is by way of example only and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (4)

In the method for automatically controlling the rolling of the plating rolling device by detecting the buckle generated in the strip, A first step of measuring the buckle of the strip through the front end buckle detection sensor and determining whether the buckle is present and transmitting a buckle generation signal; A second step of receiving the buckle generation signal and calculating the opening time of the roll of the plating rolling apparatus through distance calculation by a speed detector; A third step of sending a signal from the program logic controller to the hydraulic control controller according to the opening time to open the plating rolling apparatus and stop rolling; When the buckle generation part is completely out of the fourth step of performing the rolling by measuring the buckle of the strip through the buckle detection sensor of the plating rolling device and closing the roll of the plating rolling device again. The distance calculation is buckle control method of the plating rolling device, characterized in that calculated through the following equation. L = {Ls-(P * 3.14 * Dia / Gr)} (L; Roll open distance (M) of plated rolling device, Ls; Set distance (M) between plated rolling device and shear buckle detection sensor, P; Value fed back from speed detector (pulse), Dia; Roll diameter (M) ), Gr; gear ratio associated with the roll) In the device for automatically controlling the rolling of the plating rolling device by detecting the buckle generated in the strip, A shear buckle detection unit which calculates the difference between the measured value transmitted from the shear buckle detection sensor and the set value and compares the buckle occurrence to the comparison unit and the distance measurement unit; A rear buckle detection decision unit which calculates the difference between the measured value transmitted from the rear buckle detection sensor and the set value and compares the result of the buckle occurrence and sends it to the comparison decision unit; Calculate the difference between the set value (fixed distance between the shear buckle sensor and the rolling roll) and the detected value (buckle moving distance from the speed detector) after calculating the distance by the speed detector based on the signal transmitted from the shear buckle detection and determining unit A distance measurement operation unit performing a comparison determination process and sending the result to the comparison determination unit; When the buckle occurrence is determined according to the signal transmitted from the front buckle detection and the distance measurement operation unit, the signal is transmitted to the hydraulic control control unit to automatically open the plating rolling device, and according to the signal transmitted from the rear buckle detection unit A comparison judging part which transmits a signal to the hydraulic control control part and automatically closes the plating rolling device when it is determined that the buckle part has passed all of the plating rolling device; Buckle control device of the plating rolling device, characterized in that consisting of. The method of claim 2, The comparison judging portion is further provided with a delay timer means for preventing the instantaneous closing of the roll of the plating rolling device when there is a settlement site in the middle of the buckle generating portion buckle control device of the plating rolling device. The method according to claim 2 or 3, Bucket control device of the rolling mill, characterized in that for calculating the distance calculation in the distance calculation unit through the following equation. L = {Ls-(P * 3.14 * Dia / Gr)} (L; Roll open distance (M) of plated rolling device, Ls; Set distance (M) between plated rolling device and shear buckle detection sensor, P; Value fed back from speed detector (pulse), Dia; Roll diameter (M) ), Gr; gear ratio associated with the roll)

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