KR20020053624A - Apparatus for controlling the detection of the looper car position - Google Patents

Abstract

PURPOSE: A control apparatus for detecting position of a looper car is provided which is capable of detecting accurate position of a looper by detecting looper amount of the looper car in an automatic control method and perceiving detected values. CONSTITUTION: The control apparatus for detecting position of a looper car comprises a housing in which a plural floodlights(213) are installed, the floodlights are spaced apart from each other in a certain distance along rails; a light receiver(214) which is mounted on the looper car(100) to receive light projected from the floodlights(213); and a controller(200) which operation controls looper amounts of the looper car(100) by receiving signals transmitted from the light receiver(214), wherein the control apparatus further comprises a cleaning means for removing scale and foreign materials by ejecting air onto the floodlights(213) and light receiver(214), and sensors each of which are installed at both ends of the moving section of the looper car(100) so as to forcibly stop the looper car(100) if the looper car(100) exceeds the control limits.

Description

Apparatus for controlling the detection of the looper car position}

The present invention relates to a control device that can accurately detect the position of the looper car by preventing the malfunction of the looper amount conversion of the looper car and the zeroing recognition of the looper, and more specifically, the looper amount of the looper car is automatically controlled. The present invention relates to a looper car position detection control apparatus capable of detecting an accurate looper position by detecting a detected value.

In general, the looper (looper) is a facility for storing the strip for continuous operation of the center line when the entrance equipment is stopped. That is, the time required for welding and inspection in the process of welding the leading strip and the trailing strip in the welding machine at the entrance and transporting to the exit side, and the inspection after the width change in the trimmer cutting the strip to the width of the order The strips are stored in the looper for the smooth flow of the strips, taking into account the time required to perform and delays due to changing units of exit and other operations.

Referring to FIG. 1, the looper car 100 moves a predetermined section to store the strip 104 in the looper in consideration of the time function as described above. Bracket limit 107 is provided at both ends of the moving section of the looper car 100 to set the strip storage amount, that is, the minimum and maximum limit values of the moving distance of the looper car, and the collision preventing stopper 105 is adjacent thereto. ) Is provided.

The limit value of both ends of the looper is detected by the sensor for each section, but the moving distance of the looper car in the section is recognized as the sector unit that distinguishes the moving section. For example, as shown in FIG. 2, if the length of a specific section is 100m and the section is divided into five sectors, the movement distance of the looper car in the section is recognized by each sector. That is, five divided sectors (X11, X2, X3, X4, X5) represent the looper positions by 20m, and the looper values are output as 20%, 40%, 60%, 80%, and 100% in the corresponding sectors, respectively. do.

Therefore, even if the looper car 100 is located in the middle of each sector, the looper value of the previously recognized sector is recognized, thereby increasing the error range. For example, the actual looper car at the 39m point recognizes the looper value, 20%, which is touched by the sensor at the 20m point, causing a lot of errors, resulting in a driving failure, and a facility accident.

In addition, even if a backlash phenomenon occurs in which the looper is pushed backward while the tension is turned off during the normal operation and the strip tension is lost, the looper car has the looper value previously recognized. Therefore, the looper value zeroing is required to make the looper value recognize the zero point of looper value after the tension is off due to the error of the actual looper value. Zeroing must also be performed. As a result, extra time is required to perform zeroing, resulting in reduced productivity and worker workload.

In addition, when the welded portion of the bracket 106 installed in the looper car is dropped, the sensor 110 is not recognized or the speed of recognition is slowed down and the sensor of both ends of the looper car moving section is caused by the bending phenomenon and the locking phenomenon of the bracket 106. A malfunction of the touch occurs, and if a scale or the like scattered from the strip 104 accumulates in the sensor, the sensor does not operate.

As described above, according to the conventional embodiment, there are problems caused by the recognition deviation for each sector of the looper, the backlash phenomenon when the tension is off, and the sensor malfunction.

The present invention has been made in order to solve the above-mentioned conventional problems, the problem that the looper value error is greatly generated by detecting by sector when detecting the position of the looper, and the backlash phenomenon occurs when the tension is off The looper car position detection can solve the problem that the looper amount error occurs when the car deviates from the currently recognized value, and the scale formed in the coating of the hot rolled coil is scattered, which contaminates the sensor part and causes the looper value recognition error. The purpose is to provide a control device.

1 is a view schematically showing an operating state of a looper car according to a conventional embodiment.

2 is a view showing a looper amount detection method of a looper car according to a conventional embodiment.

3 is a view showing a looper amount detection apparatus of a looper car according to the present invention.

<Description of Symbols for Major Parts of Drawings>

100: looper car

200: controller

209: air piping

210: injection nozzle

211: protective cover

213: Floodlight

214: Receiver

In order to achieve the above object, according to the present invention, the control device for detecting the position of the looper car movably installed along the rail in the looper for storing the strip for continuous operation of the center line when the entrance equipment is stopped. A housing having a plurality of light emitters spaced apart at predetermined intervals, a light receiver mounted to the looper car to receive light projected from the light emitter, and a signal transmitted from the light receiver to receive the looper car It is characterized by consisting of a controller for operation control of the looper amount of.

That is, the looper car position detection control device according to the present invention comprises a control means for largely detecting the position of the looper car, and a control unit for calculating and controlling the value detected by the detection means as a looper amount.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

According to the present invention, the detailed looper amount can be detected by arithmetic control of the looper amount using the light of the light emitter 213 and the light receiver 214. In addition, if the initial zeroing is performed only once, the zeroing point is automatically found, the current value is recognized, and the looper amount can be confirmed as the detected value.

A protective cover is installed to prevent the scale (foreign material) from penetrating into the looper car position detection sensor unit and a cleaning device is installed inside to prevent facility accidents and to improve productivity by eliminating work delay time.

In order to detect the position of the moving looper car 100, a light projector 213 is installed in the protective cover 211 along the looper car rail, and the light receiver 214 is installed at the side of the looper car 100. To enter the protective cover 211 of the transmitter, it is installed under the transmitter 213 to receive the light emitted from the transmitter.

A control device 200 capable of arithmetic control of the signal value transmitted from the light receiver 214 to the looper amount is installed in the cab so that the looper car 100 moves forward and backward and rotates the looper roll 103. Can be saved.

Where the light emitter 213 and the light receiver 214 are installed, a cleaning device air pipe 209 and an air spray nozzle 210 capable of removing scales and foreign matters are installed on both sides of the looper to perform a cleaning role. Perform.

Meanwhile, at both ends of the looper, primary looper car stop sensors 202 and 207 and secondary stop sensors 201 and 208 for preventing the looper car 100 from coming off due to excessive movement of the looper car or too little looper. ) To prevent excessive operation of the looper car.

Both ends of the looper are equipped with an anti-shock stopper 105 in preparation for a large accident when the rail of the looper is detached. The controller (PLC; 200) installed to enable automatic operation and programs controlling the operation of each of these components is provided in the electrical room. The panel for operation is located in the cab and on site.

The operation of the present invention configured as described above is as follows.

First, when the tension of the looper is turned off while the line starts and proceeds, the Q-STOP becomes the first, and when the tension is normally turned on, the looper is stored and the looper car 100 is operated to detect the amount of looper. Sensor 214 reads into controller 200 to monitor the position of looper car 100.

Convert the maximum and minimum ranges (maximum 90% minimum 5% of the total looper's storage capacity) into the distance value, then find the zero point of the looper and automatically recognize the current looper's position. Find the looper position correctly so you can:

When the looper car 100 operates, the sensor bracket 212 attached to the looper car moves along the looper car 100 and outputs a signal from the light emitter 213 to detect the position of the looper car. The signal is received by the receiver 214 attached to the signal and transmitted to the controller 200 to calculate the position of the looper car.

The position calculation control method of the looper car is as follows.

The light emitter 213 for loop position detection is linked with the position value in units of 1 cm, and the next first point is 1 cm, except for a maximum 90% minimum 5% value for the total looper amount, so that the entire unit continues in 1 cm units.

The conversion value accordingly is calculated | required by the following formula.

L = S + (T ± n / cm),

Here, L is the shifted position value of the looper car, S is the existing looper car movement distance, T is the sensing on the sensor, n is the value of the change in movement (cm), ± n / cm is the sensing distance in units of 1 cm.

For example, in the case of moving 10 cm from the current position, 48m 25cm to the maximum value (+), the shifted position value L of the looper car becomes 48m 35cm according to the above formula. The minimum position value is calculated to be 48m 15cm.

When the position according to the looper car operation is detected, the cab control panel 200 enables the looper car operation so that the driver operates the looper car according to the working conditions.

When the contactless sensors 204 and 205 attached to the protective cover 211 of the looper position detection device detect the approach of the looper car 100, a signal is sent to the controller 200, and the controller adjusts the position of the looper car. Recognize and instruct the next task.

When the bracket 212 of the looper car 100 is touched at the positions of the sensors 204 and 205 while the normal work is performed, the looper car 100 is forcibly decelerated.

As air is supplied from the cleaning device air pipe 209 and air is injected from the air injection nozzle 210, air is supplied to the light emitter 213 and the light receiver 214 located in the protective cover 211 of the looper car position detection device. Spray to remove scale and debris.

When the looper car 100 reaches the positions of the sensors 203 and 206 and the sensor is touched, the cleaning operation in the looper position detector is finished and the forced deceleration continues.

Even if the deceleration is maintained, if the sensors 202 and 207 are touched even if the looper amount is controlled, the Q-STOP is applied regardless of the driver's control while informing the danger of exceeding the looper amount control range. Stop 100).

If the operation is continued without stopping, the looper car stop signal is forcibly output by touching the bracket 212 of the looper car from the sensors 201 and 208, and at the same time, the looper car operation is not performed by turning off the power of the main electric room. Do not

Therefore, according to the present invention, since the position of the looper car 100 is detected and controlled at a predetermined interval by the position detection method by scanning using a light emitter and a light receiver, the position of the looper car can be read in detail to determine the actual position of the looper car. It is possible to work with accurate judgment, and by installing air cleaning devices at two ends of the looper, it is possible to remove foreign substances and scales inside the looper car position detection device while detecting the exact position of the looper car. It has the effect of improving productivity and preventing safety accidents by eliminating problems such as equipment accidents and work delay obstacles.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. It should be recognized.

Claims (3)

In the control device for detecting the position of the looper car movably installed along the rail in the looper for storing the strip for continuous operation of the center line when the entrance equipment is stopped, A housing in which a plurality of light emitters are installed to be spaced apart at predetermined intervals along the rail; A light receiver mounted to the looper car to receive light projected from the light projector; And a controller for receiving a signal transmitted from the light receiver and calculating and controlling the looper amount of the looper car. The method of claim 1, And a cleaning means for injecting air into the transmitter and the receiver to remove scale and foreign matter. The method of claim 1, The looper car position further comprises a sensor installed at each end of the moving section of the looper car to detect whether the looper car exceeds the control range when the looper car exceeds the control range. Detection control device.