KR20000006094U - Furnace charging control device of billet - Google Patents

Abstract

The present invention relates to a heating furnace charging control device of a billet that can automatically detect the length of the billet charged into the wire furnace and automatically extract the billet outside the specification range.

To this end, the present invention can charge the billet supplied from the billet supply table by driving the billet supply solenoid to the wire rod furnace by heating the billet feed means, and then heat and extract the heated billet. A billet heating furnace charging control device, comprising: a length measuring unit for measuring the length of a billet transferred from a billet supply table to a billet conveying means, a length input section for inputting an upper limit value and a lower limit value of the billet; And a billet ejector solenoid for driving the billet rejector that rejects the long billet to the billet loading time, a first position detecting switch for detecting the start point of rejection of the billet ejector solenoid, and an operation point of the length measuring unit. The second position detection switch and the second position detection switch are turned on to operate the length measuring unit. Control of the billet feed solenoid, billet rejector solenoid and billet conveying means to detect the length of the billet and limit the charging into the furnace if the detected billet length is not within the range set in the length input section. A main control part is provided.

Description

Furnace charging control device of billet

The present invention relates to a billet furnace control device for controlling billet charging and extraction of billets into a wire furnace, and more specifically, to automatically measure the length of billets charged into the wire furnace. It is related with the heating furnace charging control apparatus of the billet which detected and detected the billet outside the specification range automatically.

In general, a furnace of a wire rod factory is a facility having a function of charging a billet inside to heat and extracting a rolling target temperature to perform a rolling operation. Here, the charging and heating and extraction of the billet is performed, and the process performed for the charging of the conventional billet is as shown in FIG. 1, where the billet charging material is supplied from the billet supply table 107 to the billet supply roller. When entering, the billet feed motor 109 is driven to move the billet with the billet feed roller. At this time, when the billet 101 enters the billet feed roller, the length of the billet is measured by the length measuring roll 102, and the measured data is applied to the counter of the controller (not shown) through the pulse generator 103. Will be. On the other hand, the roll measuring the length is charged into the heating furnace 115 by the billet charging roller is heated and then extracted to the outside of the heating furnace by the push-out bar 105 is rolled by the rolling roll 106. .

On the other hand, the length measurement data of the pulse generator 103 applied to the counter of the control unit is output as the measured length value of the billet through the BCD code converter. Therefore, the operator of the cab judges whether the billet is within the specification, that is, within 15,000mm ~ 18,200mm, based on the screen output value, and if the billet does not meet the specification, the billet feed roller and the billet feed roller Each motor drive was controlled to retreat, and the billet reject 108 was driven to extract the long billet and placed on the billet stacker.

However, in the conventional device for determining the length of the charged billet, the control of the non-standard billet is prevented from being charged into the heating furnace after detecting the non-standard billet. Problems such as deterioration occurred. Furthermore, since the non-standard billet is extracted based on the billet length data outputted on the screen, when the non-standard billet is charged into the furnace due to an operator's error, many problems occur when heating and extracting the billet. That is, in the case of a long billet, when the working beam inside the furnace is moved, a collision with the inner wall of the furnace occurs, the inner wall of the furnace is damaged, and the long billet is bent, which causes a problem in extracting the furnace. . In addition, in the case of the short billet, there is no problem in charging and heating the furnace, but there is a problem in that the driving of the push-out bar is interrupted during extraction of the furnace and the quality is lowered because the product falls short of the product specification.

Therefore, the present invention has been devised to solve such a conventional problem, and its purpose is to determine whether the billet is long or short by detecting the length of the billet when charging the billet into the heating furnace. If it is judged, stop the charging into the furnace, and prevent the damage of the inner wall of the furnace and the occurrence of obstacles in the extraction operation of the billet. It is to provide.

1 is a schematic configuration diagram of a heating furnace charging control device of a conventional billet.

Figure 2 is a block diagram showing the configuration of the heating furnace charging control device of the billet according to the present invention.

FIG. 3 is a circuit diagram illustrating a detailed configuration of the main controller shown in FIG. 2.

Explanation of symbols on the main parts of the drawings

102 ... length measuring roll 103 ... pulse generator

105 ... Furnace 107 ... Billet Supply Table

108 ... Billette Rejector 109,110 ... First and Second Motor

406 Display 409,425 Position detection switch

421,426 ... 1st and 2nd reset switch 422 ... Beep generator

424 ... table drive switch 427 ... reject drive switch

437 Billet loading rack 439 Long input

440 ... Short Input 441 ... Main Control

446 ... Table driven solenoid 447 ... Reject driven solenoid

In order to achieve the above object, the billet heating furnace charging control device according to the present invention sequentially transfers the billet supplied from the billet supply table by the billet feed solenoid to the wire rod furnace by the billet conveying means. A billet heating furnace charging control device capable of extracting and rolling a heated billet after charging and heating, wherein the length measurement for measuring the length of the billet transferred from the billet supply table to the billet conveying means A start of a negative input, a length input unit for receiving the upper and lower limit values of the billet, a billet ejector solenoid for driving the billet ejector for rejecting the long billet according to the billet loading time, and the reject start of the billet rejector solenoid A first position detection switch for detecting a viewpoint and a second position detection for detecting an operation timing of the length measuring unit When the switch and the second position detection switch are turned on, the length measuring unit is operated to detect the length of the billet, and if the detected billet length is not within the range set in the length input unit, charging into the heating furnace. It characterized in that it comprises a main controller for controlling the drive of the billet supply solenoid, billet rejector solenoid and billet conveying means to limit the.

Hereinafter, with reference to the accompanying drawings, the configuration and operation effects of the heating furnace charging control device of the billet according to a preferred embodiment of the present invention will be described in detail.

Figure 2 is a block diagram showing the configuration of the heating furnace charging control device of the billet according to the present invention, Figure 3 is a circuit diagram showing a detailed configuration of the main controller shown in FIG. First, as shown in FIG. 2, the billet heating furnace charging control device according to the present invention is a table driving cylinder 114 for sequentially transferring the billet 112 of the billet supply table 107 to the billet supply roller. ), A table drive solenoid 446 for controlling the drive of the table drive cylinder 114, a first motor 109 for forward and reverse rotation of the billet feed roller forward and backward, and a billet feed roller Billet conveying roller which conveys the billet conveyed by the drive to a billet charging roller, the 2nd motor 110 which performs forward and reverse rotation to forward / reverse a billet conveying roller, and the length which measures the length of a billet Measuring roll 102, the pulse generator 103 for generating pulse data corresponding to the measurement result of the length measuring roll 102, and the first position detection switch 425 for detecting the start of the reject of the long billet ) And the length measuring roll 102 The second position detection switch 409 for detecting the starting point of the operation, the reject driving solenoid 447 for controlling the driving of the billet rejector 108, and the heating furnace in accordance with the detection result of the pulse generator 103 It is determined whether the length of the billet to be charged is long or long, and when it is determined that the billet is long or short, the driving of the billet supply table 107 is stopped while limiting the charging into the heating furnace 115. The main controller 441 is configured to control the driving of each motor and the solenoid so as to retreat the long billet afterwards to allow the billet stacker 437 to be removed.

Furthermore, the heating furnace charging control device of the billet according to the present invention is a long input unit 439 and short input unit 440 to receive the appropriate numerical data from the driver (operator) to set the upper and lower limit of the length of the billet; The display 406 displays the length of the billet measured by the pulse generator 103 on the screen, and generates a specific beep sound for the driver to recognize when the determined billet is long or short. A tone generator 422, a reject drive switch 427 for controlling the drive direction of the reject drive solenoid 447, and a table drive switch 424 for controlling the drive direction of the table drive solenoid 446; And resetting the driving states of the first reset switch 421 and the first motor 109 and the second motor 110 to manually reset the driving of the beep generator 422. It further comprises a second reset switch 426 for.

In the above configuration, as shown in FIG. 3, the main control unit displays a counter 404 for counting pulse data output from the pulse generator, and converts the billet length data counted by the counter 404 into a decimal number to display. A display control unit 441 composed of a BC (BCD) code converter 405 for outputting; A first comparator 407 for comparing the output value of the non-CD decoder 405 and the length data input from the long input unit 439, and the length input to the output value of the non-CD decoder 405 and the short input unit 440. A second comparator 408 for comparing data, a first AND gate 410 for ORing the output value according to the comparison result of the first comparator 407 and the output signal of the second position detection switch 409, and The second AND gate 411 multiplying the comparison result of the second comparator 408 and the output signal of the second position detection switch 409 and the output signal of the first AND gate 410 are input to generate on pulses. The first on-pulse generator 412, the first flip-flop 414 that receives the on-pulse output from the first on-pulse generator 412, and the output signal of the second AND gate 411 are input. Receiving the second on pulse generator 413 and the second on pulse generator 413 The second flip-flop 415 and the 'Q' signals of the first flip-flop 414 and the second flip-flop 415, which are inputted from the output pulses to the set end, are output to the beep generator 422. It comprises a beep control unit of the third or gate 416.

In addition, the main control unit is driven by receiving the output signal of the third orifice 416, the first and second timers 417 and 418, the output signal of the first reset switch 421 and the first timer ( The first or gate 420 and the output signal of the first reset switch 421 and the second timer are applied to the reset terminal of the first flip-flop 414 by receiving and outputting the output signal of the first flip-flop 414. A second orifice 419 for receiving the output signal of 417 and performing logical sum operation to be applied to the reset terminal of the second flip-flop 415 and the output signal of the first on pulse generator 412 are set. A third flip-flop 430 for receiving the output signal of the third timer 429 which is input to the stage and driven by the output signal of the first position detection switch 425, and the first flip-flop 'Q' output negative signal of the fourth flip-flop 431 which receives the 'Q' output of 414 at the set end and the output of the table driving switch 424 A table driving controller having a third end gate 433 for multiplying the output signal by the logical signal and applying it to the table driving solenoid 446; A third timer 429 that is driven by an output signal of the first position detection switch 425 to apply the output signal to the reset end of the third flip-flop 430, and the third flip-flop 430 A reject driving solenoid driven by receiving a fourth AND gate 432 for performing an AND operation on a 'Q' output and an output signal of the first position detection switch 425, and an output signal of the fourth AND gate 432. And a reject drive control section (447).

Further, the main control unit outputs the fourth or gate 444 and the reject driving switch 427 which OR the output signal of the second reset switch 426 and the 'Q' output of the third flip-flop 430. A fifth AND gate 434 that logically multiplies the signal by the negative output signal of the fourth or gate 444, and an AND signal which is negatively output by the reject drive switch 427 and the output signal of the fourth or gate 444. The motor driver 445 for receiving the output signals of the sixth end gate 435 and the fifth and sixth end gates 434 and 435 to drive the first motor 109 and the second motor 110 forward and backward. It further comprises a motor drive control unit.

Hereinafter will be described in detail the operation of the heating furnace charging control device of the billet according to an embodiment of the present invention.

First, in the heating furnace charging control apparatus of the billet according to the present invention, when the billet is charged into the billet supply table 107, the billet is transferred to the billet supply roller side by the table driving cylinder 114, and then the feed roller is moved. It drives and delivers a billet to a conveyance roller side. At this time, when the billet is transferred to the feed roller by the second position detection switch 409 located at the tip of the feed roller, the length of the billet is measured through the length measuring roll 409. This may be determined as a value converted into a decimal number through the non-CD decoder 405 after counting the output of the pulse generator 103 which receives the sensing signal of the length measuring roll 409 and generates a predetermined pulse signal. The billet length data determined at this time is compared with the length upper limit value and the length lower limit value of the billet set through the long input unit 439 and the short input unit 440, respectively. As a result of the comparison, when the measured length of the billet measured by the pulse generator 103 falls within the range of the upper limit and the lower limit of the billet, it is determined that the product meets the standard. It is determined as a standard product and the billet extraction is performed. At this time, the measurement length of the billet measured by the pulse generator 103 is output to the screen on the display 406 to be recognized by the operator of the cab.

First, when the measured length of the billet is included in the upper limit and the lower limit, the feed roller and the charging roller are driven forward to charge and heat the billet into the heating furnace 115. After the heating of the billet is completed, the billet push-out bar 105 is driven to discharge the heated billet to the rolling roller 106 outside the heating furnace to perform a rolling process.

On the other hand, when the measured length of the billet is larger than the preset upper limit or smaller than the lower limit, the motors are driven to reverse the feed roller and the feed roller. At this time, when the feed roller and the feed roller are driven backward by the driving of each motor and the billet determined to be non-standard is detected by the first position detection switch 425 installed at the rear end of the feed roller, the drive of the feed roller and the feed roller is stopped. After driving, the billet reject 108 is driven to transfer the non-standard billet to the billet stacker 437. After the extraction of the non-standard billet is completed, the above process of receiving the next billet from the billet supply table 107 and charging it into the heating furnace is repeated.

On the other hand, the operation of the main control unit for implementing the present invention will be described. That is, as shown in Figure 3, the billet is measured by the length measuring roll while the billet is transferred to the billet feed roller passing through the feed table 107 to the feed roller in the wire rod charging process ) Pulse data is input to the counter 404 and deciphered through the non-CD decoder 405 and then output to the screen on the display 406 installed in the cab. At the same time, the decimated pulse data is input to the type force terminals of the first and second comparators 407 and 408 which have been manually input by the operator to the length upper limit value and the length lower limit value, respectively, to the length upper limit value and the length lower limit value. Will be compared with The first comparator 407 and the second comparator 408 compare the length upper limit value with the measured actual length value, the length lower limit value and the measured actual length value, respectively, and the measured actual length value is greater than the upper limit length value, respectively. Alternatively, when the length is smaller than the lower limit, a signal having a high level voltage is output to the first and second AND gates 410 and 411. Accordingly, the second position detection switch 409 is turned on in the first and second AND gates 410 and 411, so that the output signals of the first comparator 407 and the second comparator 408 are ' Becomes high, and outputs a signal of 'high' level as an output signal. When the output signals of the first comparator 407 and the second comparator 408 are at a 'low' (eg, 0V) level, a signal having a 'low' level is output. That is, the first and second end gates 410 and 411 may be configured to have a length measurement result when the second position detecting switch 409 is turned on, if the length of the billet is not within the range of the upper limit and the lower limit. The first on pulse generator 412 and the second on pulse generator 413 are driven. As the first on pulse generator 412 or the second on pulse generator 413 is driven, the first flip flop 414 or the second flip flop 415 is set so that the output of the third or gate 416 is' High, and the beep generator 422 is driven to signal a non-standard billet.

On the other hand, the 'high' output signal of the third or gate 416 is input to the first and second timers 417 and 418 to drive the timer, when the predetermined time (T1) (T3) set in the timer elapses By turning the output of the first and second orifices 419 and 420 high, the first and second flip-flops 414 and 415 are reset to turn off the beep generator 422. In addition, when the first reset switch 421 provided to manually reset the driving of the beep generator 422 is turned on by an operator, the outputs of the first and second orifices 420 and 419 are operated in the same manner as described above. Becomes high, driving of the beep generator 422 is turned off.

When the beep generator 422 is driven as described above and the driver recognizes that the billet transferred to the feed roller is a long billet, the driving of the billet feed table 117 is stopped and the feed roller and the feed roller are retracted. The long billet is extracted by the billet stacker 437. That is, when the billet is long, charging into the heating furnace is not possible, and even though the table driving switch 424 is turned on, the negative signal of the 'Q' signal of the fourth flip-flop 431 is not included. It is applied to the three end gates 433 to turn off the driving of the table driving solenoid 446.

In addition, the output signal of the first on-pulse generator 412 sets the third flip-flop 430, the fourth or gate 444 receives the 'Q' signal of the third flip-flop 430 receives the fifth And controlling driving of the motor controller 445 to reversely rotate the first motor 109 and the second motor 110 through the sixth end gates 434 and 435. Thus, the first motor 109 and the second motor 110 are rotated in reverse to reverse the billet to the feed roller. At this time, if the backward completion of the billet is detected by the first position detection switch 425, the output of the fourth end gate 432 becomes 'high', and accordingly the reject driving solenoid 447 is driven to billet. The reject 108 is driven to take out the long billet to the billet stacker 437. At the same time, the high level output signal of the fourth end gate 432 is applied to the off pulse generator 443 to reset the fourth flip-flop 431 to drive the table driving solenoid 446 to supply the next billet to the supply roller. To be transported.

On the other hand, the third timer 429 receiving the detection signal of the first position detection switch 425 has a third flip-flop when a predetermined time T10 set corresponding to the driving completion time of the billet rejector 108 has elapsed. By resetting 430, the level of the 'Q' output signal becomes 'low' and the output signal of the fourth end gate 432 becomes the 'low' level. As a result, the reject driving solenoid 447 is turned off, and the output of the fourth or gate 444 is also low, so that the motor driving control unit 445 is driven to rotate the motor forward. Thus, the first motor 109 and the second motor 110 charge the next billet into the heating furnace by advancing the feed roller and the transfer roller.

The heating furnace charging control device of the billet according to the present invention is not limited to the above-described embodiment and may be variously modified within the range allowed by the technical idea of the present invention.

As described above, the billet furnace heating control device according to the present invention by measuring the length of the billet before charging the billet into the wire furnace to distinguish whether the length of the billet is long or short In the case of the long billet, the charging into the heating furnace is automatically restricted and the automatic billing of the long billet is applied to the long billet, so that it is possible to improve the work efficiency.

In addition, by limiting the charging of the long billet to the heating furnace, productivity can be improved by preventing the occurrence of obstacles during the extraction of the billet due to the damage of the inner wall and the bending of the long billet during the working beam operation of the furnace. Can provide a beneficial effect.

Claims (3)

The billets supplied from the billet feed table by the billet feed solenoid are sequentially loaded into the wire rod furnace by the billet feed means and heated, and then the heated billets are extracted and rolled. In the furnace charging control device, A length measuring unit for measuring the length of the billet transferred from the billet supply table to the billet conveying means; A length input unit for inputting the upper and lower limit values of the billet, Billet injector solenoid which drives billet injector which rejects long billet to billet pile, A first position detection switch detecting a start time of rejection of the billet rejector solenoid; A second position detection switch detecting an operation time of the length measuring unit; When the second position detection switch is turned on to operate the length measuring unit to detect the length of the billet, if the length of the detected billet is not included in the range set in the length input unit to limit the charging into the heating furnace And a main controller for controlling the driving of the billet supply solenoid, the billet rejector solenoid, and the billet conveying means. The method of claim 1, When the billet is supplied from the billet supply table, the main control unit moves the billet conveying means to move toward the heating furnace, and when the billet is detected by the second position detection switch, the length measuring unit is driven to drive the billet. A heating furnace charging control device for billets, characterized in that the length is measured. The method according to claim 1 or 2, When the main controller determines that the length of the billet measured by the length measuring unit is not included in the range set in the length input unit, the main control unit reverses the billet conveying means and stops the driving of the billet supply table. And controlling the driving of the billet supply solenoid and driving the billet rejector solenoid according to a detection result of the first position detecting switch to drive the billet out of the billet according to the billet loading time. Furnace charging control device of billet.