KR100897142B1 - Apparatus for varifing of mold width in continous casting machine - Google Patents

Abstract

The present invention can simply and accurately change the mold width by using the pulse signal generated from the digital taco generator, and even after the power supply supplied during the mold replacement is cut off, the mold width can be easily inputted and corrected. Another object is to provide a player mold width variable device.

Therefore, the present invention provides a sensor 100 for transmitting a pulse signal generated by the digital taco generator 302 integrally formed with the servo motor 300 for varying the width of the mold to the main control computer 304, and the main control computer. The digital taco generator 302 and the calibration unit 200 for driving the servo motor 300 to calculate the pulse width transmitted to the 304 to indicate the width of the mold and feed it back to the width of the mold are set. It provides a player mold width variable device consisting of a steam cut-off unit 400 for blocking.

Mold, Digital Taco Generator, Pulse, Control Computer

Description

Apparatus for varifing of mold width in continous casting machine}

1 is a view schematically showing a general player.

Figure 2 is a block diagram showing the configuration of a player mold width variable device according to the prior art.

Figure 3 is a block diagram showing the configuration of the sensing unit of the player mold width variable apparatus according to the present invention.

Figure 4 is a block diagram showing the configuration of the correction unit of the player mold width variable apparatus according to the present invention.

Figure 5 is a block diagram showing the configuration of the steam cutoff portion of the apparatus mold width variable apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>
100: detection unit 200: correction unit

300: servo motor 400: steam cut off

delete

The present invention relates to a player mold width variable device for varying the width of the mold of the player, and more particularly, by accurately measuring the width of the mold using a pulse signal generated from a digital taco generator that is integrally installed in the servo motor. It relates to a player mold width variable device that can accurately correct the width of the mold.

In general, the player 10 includes a tundish 42 for temporarily storing molten steel from the ladle 40, a mold 12 for solidifying molten steel falling from the tundish 42, and a molten steel solidified in the mold 12. It consists of a pinch roll 44 for carrying out.

In addition, the front of the tundish 42, the cab 50 is installed on one side in order to see the falling molten steel, the electrical room 60 made of a comfortable environment that can operate the electrical equipment at a certain distance from the player 10 This is installed.

As shown in FIG. 2, the absolute encoder sensor 16 measuring the width of the player mold is installed at the upper and lower parts of the reducer 14 installed at both short sides of the mold 10 of the player 10. As the rotation generates an absolute pulse signal, the generated pulse signal is transmitted to the pulse counter 20 of the main control computer 18 to continuously measure the variable amount of the width of the mold 12.

Conventionally, when the variable position data and the end time of the target mold 12 width are input to the motion controller 22 through the RS-485 communication device 21 in the main control computer 18, the motion controller 22 is The speed reference is transmitted to the servo drive 24 by converting the variable position and the end time of the target mold 12 width into the speed reference, and the servo drive 24 outputs a voltage corresponding to the speed reference to the servo motor 26. ) Will be driven.

When the servo motor 26 is driven, the digital taco generator 28 feeds back a feedback pulse signal proportional to the actual speed of the servo motor to the servo drive 24 to compensate for the speed deviation.

At this time, when the servo motor 26 is driven, the reducer 14 is rotated, and the rotational force of the reducer 14 is applied to the short side of the mold 12 so that the width of the mold 12 is varied.

When the short side of the mold 12 starts to be variable, the position detection and control of the short side, which is the final goal and the most important element of the variable width, is performed by the absolute encoder sensor 16 connected to the opposite axis according to the rotation of the reducer 14. While rotating as shown in (14), it generates an absolute pulse which is proportional to the rotational speed of the reducer 14, and transmits it to the pulse counter 20 in the main control computer 18 to count the number of input absolute pulses. do.

The absolute pulse counted in this way is converted to the short side position of the mold 12 being changed through the position calculator 30, and finally the rotation speed of the servo motor 26 is controlled by using the converted position value. This variable is changed to the target position.

However, high temperature steam is generated by the coolant during the casting operation, and the inside of the spray chamber of the player becomes very high and irregular in humidity and temperature.

Therefore, the absolute encoder sensor is broken due to this, and thus the width cannot be changed. Therefore, there is a problem in that production is interrupted and productivity is reduced.

In addition, if the absolute encoder sensor is replaced when the mold is replaced, the main control computer and the power supplied to the mold should be cut off. If the power of the absolute encoder sensor is also cut off, the width of the stored mold is lost.

Therefore, before mounting the absolute encoder sensor from the reducer, it is necessary to measure the position of the actual short side using a tape measure and remove it. Excessive work time is used and manual measurement at the same time. There is this.

Accordingly, the present invention has been made to solve the above problems, it is possible to simply and accurately vary the mold width by using a pulse signal generated from the digital taco generator that is integrally attached to the servo motor used for speed control An object is to provide a player mold width variable device.

Another object of the present invention is to provide a player mold width variable device capable of simply inputting and correcting a mold width after replacement even if the power supplied to the mold exchange is cut off.

In order to achieve the above object, the present invention is a player mold width variable device for varying the mold width of the player, the main control computer for generating a pulse signal generated in the digital ride generator formed integrally with the servo motor for varying the width of the mold; Detecting unit for transmitting to; A correction unit for calculating a pulse signal transmitted to the main control computer to indicate a width of the mold and feeding the feedback to the servo motor to drive the servo motor to a width of the mold; Provided is a player mold width variable device including a protective cover installed to seal the servo motor, a steam cut-off unit consisting of a compressor for supplying air dried by communicating with one side of the protective cover.

The detector includes a photocoupler that insulates the signal transmitted from the digital taco generator, a pulse filter that filters the signal insulated from the photocoupler, a microprocessor that converts the signal filtered by the pulse filter into a position signal, and a position signal converted by the microprocessor. A programmable logic device that converts gray signals, an output photocoupler that insulates the converted gray signal from the programmable logic device and sends it to the main control computer, a 7-digit display that displays the converted gray signal from the programmable logic device, and a microprocessor. It is preferably made of a whitefish battery that is electrically connected and installed to store the position signal of the mold.

In addition, the calibration unit is a push button switch installed in the cab to input the width of the mold, a BCD code converter for converting the signal input to the push button switch to the BCD code, a microprocessor to convert the output signal through the BCD code converter and output Preferably, the RS-485 communication controller controls an interface between the microprocessor and the sensing unit, a photocoupler for isolating a signal transmitted from the microprocessor, and a 7-digit display for displaying an insulated signal from the photocoupler.

Hereinafter, the player mold width variable device according to the present invention will be described with reference to the accompanying drawings.

Figure 3 is a block diagram showing the configuration of the sensing unit of the player mold width variable apparatus according to the present invention, Figure 4 is a block diagram showing the configuration of the correction unit of the player mold width variable apparatus according to the present invention, Figure 5 is the present invention It is a block diagram which shows the structure of the steam interruption part of the apparatus mold width variable apparatus which concerns on this.

The player mold width variable device includes a sensing unit 100 for transmitting a pulse signal generated by the digital tacho generator 302 integrally formed in the servo motor 300 for varying the width of the mold to the main control computer 304, and the main unit. The digital taco generator 302 and the calibrator 200 for driving the servo motor 300 to calculate the pulse width transmitted to the control computer 304 to indicate the width of the mold and to feed back the width of the mold. It is made of a steam blocking unit 400 to block from steam.

In this case, the sensing unit 100 may be installed in an electric room 60 having an appropriate environment, and the calibration unit 200 may be installed in the cab 50 so as to quickly correct the mold width.

First, the sensing unit 100 is provided with a 7-digit display 101 indicating a variable amount of the continuously measured mold width, a power switch for turning on / off the power, and an LED lamp for checking the power.

 In addition, the photo-coupler 104 for inputting the pulse signal input at high frequency and insulated from the digital taco generator 302 signal, the pulse filter 105 for filtering the noise of the input pulse signal, and the pulse filter The microprocessor 107 converts the pulse signal filtered by the 105 into position data and controls the interface with the calibration unit 200 through the RS-485 communication controller 108, and the position converted by the microprocessor 107. A programmable logic device 109 for converting data to a gray signal and an output photocoupler 110 for isolating the signal before transmitting the converted gray signal to the main control computer 304.

In addition, the backup battery 106 is electrically connected to the microprocessor 107 so that the variable data of the measured mold width can be maintained even when the power is cut off.

Next, the calibration unit 200 is a power switch to turn on / off the power, LED lamp to check the power, push button switch 203 that can be input to the width of the measured mold without error, and input A counter 205 for counting the width of the mold, a BCD code converter 208 for converting the width of the mold counted by the counter 205 into a BCD code, and a width of the mold input through the BCD code converter 208. Microprocessor 209 for converting the signal into a predetermined signal and outputting it, a photocoupler 211 for insulating the signal output from the microprocessor 209, and checking whether the width of the mold is normally input to the sensing unit. It consists of a digit display 207.

In addition, the RS-485 communication controller 210 is connected to the microprocessor 209 to control the interface with the sensing unit 100.

Next, the steam blocking unit 400 includes a protective cover 402 for sealing the servo motor 300 so as to protect the digital pulse generator 302 integrally installed in the servo motor 300 from steam, and generates a positive pressure to generate air. Compressor 404 for pumping, an air dryer 406 for removing moisture in the produced air, and a solenoid valve 408, 410 for opening and closing the flow of air.

Hereinafter, the operation of the player mold width variable apparatus according to the present invention will be described.

First, when the servo motor 300 is driven to change the mold width, the digital taco generator 302 generates pulse signals having A and B phases. In order to input the generated pulse signals on the A and B to the sensing unit 100, the signal is insulated using the photocoupler 104. The isolated pulse signals on A and B pass through the pulse filter 105 for filtering noise, thereby increasing the reliability of the signals, and the filtered pulse signals on A and B are input to the microprocessor 107.

At this time, the microprocessor 107 detects an input sequence of pulse signals on A and B having a phase difference of 90 ° and checks whether the width of the mold is increased or decreased, and counts the number of input pulses, The position is calculated.

The calculated position of the short side is calculated by adding the position data initially set by the calibration unit 200 to calculate the final variable width.

The variable amount of the calculated mold width is stored using the backup battery 106 to maintain the position data even when the power supply of the sensing unit 100 is cut off.

In addition, the microprocessor 107 inputs the calculated position data to the programmable logic device 109 and communicates bidirectionally with the calibration unit 200 installed in the cab 50 through the RS-485 communication controller 108. Can be.

The programmable logic device 109 converts the mold width position data into a gray pulse signal for transmitting the mold width position data calculated in the microprocessor 107 to the main control computer 304.

The gray pulse signal thus converted is transmitted to the main control computer 304 after signal isolation through the output photocoupler 110 and at the same time installed in the final sensing unit 100 input to the programmable logic device 109. -Transmitted to the digit display 101, so that the variable state of the mold width can be easily confirmed.

In addition, the variable after replacing the mold first inputs the width of the mold measured using the pushbutton switches 203 and 204.

When the counter 205 is displayed according to the input of the push button switches 203 and 204, the BCD code converter 208 transmits the BCD signal corresponding to the input number to the microprocessor 209.

Next, when the set switch is pressed, the value of the mold width stored in the microprocessor 209 is set by the RS-485 communication controller 210 through the RS-485 communication controller 108 of the sensing unit 100. ), And after the transmission is normally performed, the width of the mold input to the sensing unit 100 is fed back to appear on the 7-digit display 207.

 Next, when air is generated in the compressor 404 to block steam, the air is converted into dry air through the air dryer 406 along the installed pipe, and at this time, the inlet solenoid valve 408 is opened to protect the cover ( 402) Allow dry air to be supplied into the interior.

Therefore, the air dried in the protective cover 402 is circulated, the circulated air is discharged to the open solenoid valve 410 open.

As described above, since the player mold width variable apparatus according to the present invention uses a signal generated from the digital tachogenerator drop instead of the frequent encoder sensor that has frequent failures, the productivity can be prevented from falling due to the failure of the sensor.

In addition, since the microprocessor is powered by the backup battery when the mold is replaced, the information on the width of the mold is stored to reduce the maintenance time, and the width data of the stored mold is used without measuring the width of the mold with a tape measure. The accuracy of slab width is improved.

Claims (3)

In the player mold width variable device for varying the mold width of the player, A detector for transmitting a pulse signal generated by a digital ride generator formed integrally with a servo motor to vary the width of the mold to a main control computer; A calibration unit for driving the servomotor to calculate the pulse signal transmitted to the main computer to indicate the width of the mold and to feed back the width of the mold; A protective cover installed to seal the servomotor, a first pipe communicating with one side of the protective cover and supplying dry air therein, and a compressor installed in the first pipe to supply positive pressure air into the protective cover, An air dryer installed between the first pipe and the compressor to remove moisture from the air supplied from the compressor, and a steam blocking part including a second pipe communicating with the other side of the protective cover to discharge air supplied to the servomotor; Including, And a solenoid valve for adjusting air flow in the first pipe and the second pipe. The method of claim 1, The detector includes a photocoupler that insulates the signal transmitted from the digital taco generator, a pulse filter that filters the signal insulated from the photocoupler, a microprocessor that converts a position signal from the signal filtered by the pulse filter, and the microprocessor A programmable logic device that converts the converted position signal to a gray signal, an output photocoupler that insulates the converted gray signal from the programmable logic device and transmits the gray signal converted from the programmable logic device to the main control computer; Digit display, the apparatus mold width variable device, characterized in that the electrical connection is installed to the microprocessor made of a battery for storing the position signal of the mold. The method of claim 1, The calibration unit is a push button switch installed in the cab so as to input the width of the mold, a BCD code converter for converting the signal input to the push button switch into a BCD code, and converts the signal received through the BCD code converter to output A microprocessor, an RS-485 communication controller for controlling an interface between the microprocessor and the sensing unit, a photocoupler for isolating a signal transmitted from the microprocessor, and a 7-digit display for displaying an insulated signal from the poltocoupler. A player mold width variable device, characterized in that made.

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