KR20020052752A - Roll checking apparatus for continuous thin slab casting machine and its checking method - Google Patents

Abstract

PURPOSE: Roll checking apparatus and method are provided which recognize roll threading point of time and accurately measure roll gap and rotation conditions of rolls using measured signals of a sensor generated according to transfer of a dummy bar by inserting the dummy bar into segments of a continuous thin slab casting machine during non-casting. CONSTITUTION: In a roll checking apparatus(100) for checking conditions of rolls installed at a continuous casting machine casting molten steel discharged from a mold, the roll checking apparatus(100) comprises a sensor part(10) measuring roll gap and rotation conditions of the rolls as it is passing between the rolls of the continuous casting machine during non-casting; and a control part(50) which is connected to a dummy bar passing between the rolls of the continuous casting machine during non-casting and hinge connected to the sensor part(10) to analyze information of the rolls by receiving electric signals outputted from the sensor part(10), wherein the sensor part is equipped with a plurality of roll gap measuring sensors(13) measuring gaps between the rolls of the continuous casting machine, a plurality of roll rotation defect sensing sensors(19) which are installed between the roll gap measuring sensors(13) to measure rotation conditions of the rolls, and a plurality of anvils(17) which are elastically installed by springs so as to apply the same degree of force as repulsive force exerted on the rolls as the sensor part is passing between the rolls, and the control part(50) is equipped with a roll gap amp box(51) processing the roll gap measured signals outputted from the sensor part, an analog to digital convertor converting the signals outputted from the roll rotation defect sensing sensors(19) into digital signals, a central processing unit analyzing the roll gaps and roll rotation conditions by receiving the signals outputted from the analog to digital convertor, a radio remote controller wireless transmitting the information analyzed in the central processing unit, and a battery pack(57) supplying power supply to the central processing unit and the roll gap amp box(51).

Description

Roll checking apparatus for continuous thin slab casting machine and its checking method

The present invention relates to an apparatus and a method for measuring the roll gap of two opposite segments of a continuous casting machine, and more particularly, to measure the roll gap and the rotational state of the roll while passing between the two segments connected to the dummy bar during non-casting The present invention relates to a roll inspection apparatus and an inspection method thereof.

In general, molten steel is cast in a continuous casting machine (hereinafter referred to as "rolling cycle") into slabs having a constant thickness and width. In order to improve the quality of the slab produced in the machine and the productivity of the slab, it is necessary to check the gap of the guide roll installed in the machine segment during casting.

1 is a schematic diagram showing equipment of a general player.

As shown in FIG. 1, since the management of the guide roll gap of the player has a great influence on the surface and internal cracks of the caster, it is necessary to set and maintain an appropriate roll gap according to the type of cast steel to ensure quality. It is an indispensable element.

Conventionally, the roll gap has been managed by using a value obtained by measuring a person directly and a value calculated by a detection mechanism by inserting a gap driving device. However, in this manner, the deformation of the frame due to the bending and wear of the roll, heat and load Or abnormality of the roll gap resulting from the damage of a shaft was not managed, and a large quantity of quality abnormalities may arise.

To date, there is no state measuring device of the guide roll 3 that can be used in the mini mill process. This is because the minimum thickness of the slab produced in the thin slab continuous casting machine is as thin as 50 ~ 100mm, because the spacing between the two segments 1 is too small, which makes it difficult to transport the device that can measure the roll gap. This is because the development of a conventional strand status monitor is not easy.

The present invention is provided to solve the problems of the prior art as described above, the pass of the roll using the measurement signal of the sensor generated by the transfer of the dummy bar by inserting into the segment of the thin slab continuous casting machine during the non-casting It is an object of the present invention to provide a roll inspection apparatus and an inspection method thereof capable of accurately measuring a roll gap and a roll rotation state as well as recognizing a viewpoint.

1 is a schematic diagram showing the equipment of a typical player,

2 is a plan view of a roll inspection apparatus according to an embodiment of the present invention,

3 is a side view of the roll inspection apparatus shown in FIG.

4 is a plan view (b) showing a state in which the roll inspection apparatus shown in FIG. 2 is installed and a plan view (a) showing a general dummy bar,

5 is a conceptual diagram illustrating a signal flow of a controller of the roll inspection apparatus illustrated in FIG. 2;

FIG. 6 is a schematic diagram illustrating a process in which the roll inspection apparatus illustrated in FIG. 2 progresses between segments of a general player.

♠ Explanation of symbols on the main parts of the drawing ♠

1: segment 3: roll

10 sensor unit 13 roll gap measuring sensor

19: roll rotation detection sensor 50: control unit

51: roll gap amplifier box 55: controller

70: dummy bar 77: the dummy head portion

According to the present invention for achieving the object as described above, in the roll inspection device for inspecting the state of the roll installed in the continuous casting machine for casting molten steel discharged from the mold, passing between the rolls of the continuous casting machine during non-casting While connected to the sensor unit for measuring the roll gap and the roll rotation state information, and the dummy bar passing between the roll of the continuous casting machine during the non-casting and hinged with the sensor unit receives the electrical signal output from the sensor unit There is provided a roll inspection device including a control unit for analyzing the information of the roll.

In addition, the sensor unit of the present invention is installed between the plurality of roll gap measuring sensor for measuring the gap between the roll of the continuous casting machine, and the roll gap measuring sensor is a plurality of roll rotation failure to measure the rotational state of the roll A sensing sensor and a plurality of anvils are elastically installed by the spring to apply the same force as the repulsive force on the roll while passing through the roll, the control unit is a roll gap measurement signal output from the sensor unit A roll gap amplifier box for processing a; and an A / D converter for converting a signal output from the roll gap amplifier box and a signal output from the roll failure sensor to a digital signal; and a signal output from the A / D converter. A central processing unit (CPU) for receiving a roll gap and roll rotation state information, and a wireless remote unit for wirelessly transmitting the analyzed information from the CPU. A controller and a battery pack for supplying power to the CPU and the roll gap amplifier box.

Further, according to the present invention, in the method of inspecting the state of the roll while passing between the rolls installed in the continuous casting machine for casting molten steel discharged from the mold, the roll gap and the roll rotation state while passing between the rolls of the continuous casting machine Measuring a gap with the roll sensor and the roll gap information and the roll rotation state information measured by the measuring sensor, and analyzing the gap and rotation state of each roll of the continuous casting machine; The roll inspection method includes transmitting the roll information to the roll information receiver installed around the continuous casting machine by wirelessly transmitting the roll gap and the roll rotation state analyzed in the above.

In the following, with reference to the accompanying drawings, a preferred embodiment of the roll inspection apparatus and the inspection method of the thin slab continuous casting machine according to the present invention will be described in detail.

First, as shown in FIG. 1, a general thin slab player has a total of six segments 1, and is composed of a total of 55 pairs of rolls 3. In the middle of the segment 1 there is a pinch roll 5 which is driven by a motor to draw the slab and the rolls other than the pinch roll are idle rolls which return to frictional force by contact with the slab. . It is impossible to adjust the gap for the individual rolls in the segment 1 by adjusting the roll gap of the thin slab player, and the roll gap is adjusted by moving the segments by the hydraulic cylinder 7.

In the roll inspection apparatus and inspection method thereof of the thin slab continuous casting machine according to the present invention, the basic preconditions of the strand state monitoring system for thin slab players are as follows.

First, the connection should be connected to the chain, replacing the dummy bar head.

Secondly, the measuring point is automatically measured while drawing the dummy bar as in casting.

Third, the measurement speed is designed to be possible at maximum circumferential speed. Was designed under the basic preconditions.

2 is a plan view of the roll inspection apparatus according to an embodiment of the present invention, Figure 3 is a side view of the roll inspection apparatus shown in Figure 2, Figure 4 is a state in which the roll inspection apparatus shown in Figure 2 is installed Is a plan view (b) and a general dummy bar (a), and FIG. 5 is a conceptual diagram showing a signal flow of the control unit of the roll inspection apparatus shown in FIG. 2, and FIG. 6 is a roll inspection apparatus shown in FIG. Schematic diagram showing the process of progressing between segments of a typical player.

As shown in Figures 2 and 3, the roll inspection apparatus 100 is largely equipped with a sensor unit 10 equipped with measurement sensors, and a control unit 50 for processing, storing and transmitting information input from the measurement sensors. Can be divided. The sensor unit 10 and the control unit 50 are connected by the connecting bolt 45.

The body of the sensor unit 10 in which a plurality of measuring sensors is installed is a plate, and a total of 12 roll gap measuring sensors 13 for measuring a roll gap are installed on the top and bottom of the body. A total of four (19) are installed on each side, and the anvil (17) elastically installed with spring is applied three times on one side to apply the same force as the repulsive force on the roll (3) during continuous slab casting. Six are installed. At this time, assuming that six roll gap measuring sensors 13 installed on one surface are installed at regular intervals, one anvil 17 is installed at the center of the body of the sensor unit 10 and the other two anvils ( 17 is provided between each of the two roll gap measuring sensors 13 at both edges, and the roll failure detecting sensor 19 is formed by the two roll gap measuring sensors 13 and the anvil 17 installed at both ends. Is installed between. In addition, two sensor bolts 10 are installed on opposite sides of the connection bolt 45 connecting the sensor unit 10 and the control unit 50, that is, at the tip end side of the sensor unit 10. In addition, a total of eight through holes 61 are formed at the rear end of the controller 50, that is, the opposite side of the eye bolt 21, and fixed in a state corresponding to the eight through holes 75 formed in the dummy bar 70. It is connected by bolts (not shown). Therefore, it is fastened to the dummy bar 70.

Then, the control unit 50 is connected to the rear end of the sensor unit 10 by the connecting bolt 45, at this time, the sensor unit 10 and the control unit 50 at a predetermined angle according to the traveling direction (Fig. 3). The sensor unit 10 and the control unit 50 are hinged by the connecting bolt 45 so as to be tilted by α).

In addition, the control unit 50 has sensors 13 and 19 during the transfer of the roll gap amplifier box 51 and the roll inspection device 100 for signal processing of the differential transformer LVDT used as the roll gap measuring sensor 13. There is a controller 55 for continuously receiving the signal from the storage device in real time and a battery pack 57 for driving the controller 55 and the roll gap amplifier box 51 without the aid of external power during measurement. It includes a wireless remote control module that can be controlled by a remote controller external to the device to start the controller 55 so that power is supplied to the ready mode for measurement. In addition, the rear end of the controller 50 is connected to the dummy bar connecting portion 60 to which the first chain 73 of the dummy bar 70 is hinged, and the dummy bar connecting portion 60 is connected to the first chain 73. Eight through holes 75 and eight through holes 61 corresponding to the through holes 75 and the through holes 61 of the dummy bar connection part 60 of the first chain 73 are formed. In the corresponding state, the fixing bolt is fastened so that the roll inspection device 100 and the dummy bar 70 are connected.

As shown in (a) of FIG. 4, the dummy bar 70 includes a dummy head portion 77, a first chain 73 having eight through holes 75 connected to the dummy head portion 77, and And a second chain 71 connected to the first chain 73. The dummy bar 70 enters along the strand of the segment 1 from the second chain 71.

On the other hand, as shown in Figure 4 (b), the roll inspection apparatus 100 of the present invention has eight through holes formed in the dummy bar connecting portion 60 of the roll inspection apparatus in the state that the dummy head portion 77 is removed ( 61 and eight through holes 75 of the first chain 73 are fastened and fixed by fixing bolts in a state in which they are located to correspond. Then, the second chain 71 enters along the strand of the segment 1.

The roll inspection apparatus configured as described above allows the roll inspection apparatus to be at the center of the segment upper and lower rolls during the roll inspection.

On the other hand, as shown in Figure 5, the sensors 13, 19 of the sensor unit 10 is composed of two types for the detection of the roll gap and roll rotation failure, these sensors (13, 19) are each Signal is input to the roll gap amplifier box 51, which is a signal processor, is connected to an analog input terminal through signal processing, and the roll number recognized by the displacement sensor signal for measuring the roll gap and the bending amount is digital I It is entered via / O. The input signal is input to a central processing unit module 55-2 via an analog-to-digital converter 55-1, and is then converted by a physical quantity conversion equation according to a sensor output to convert various kinds of signals. Operation will be processed.

The main controller 55 of the roll inspection device is an embedded computer including RAM and flash disk as 586.DX and has two serial ports. The measurement data was automatically stored in the flash memory 55-3 in the device, and after completion of the measurement, the data was input by connecting a serial cable.

On the other hand, as shown in Figure 6, rolls 3, which are generally used in mini mill players, use two divided rolls 3-2 or three rolls 3-3. There is a bearing support 9 at the divided portion of the roll 3, and these bearing supports 9 are arranged in a zigzag form sequentially in the slab advancing direction.

The width direction position of the roll gap measuring sensor 13 was determined so that the intermediate bearing support 9 of the split rolls 3-2 and 3-3 did not interfere with the roll gap. In the case of 3-2), three roll gap measuring sensors 13 are in contact with each of the split rolls, and in the case of the three split rolls 3-3, the two roll gap measuring sensors 13 are each part of the split rolls. It can be seen that the arrangement of the roll gap measuring sensor 13 is well made in the width direction because it is in contact with.

The dummy bar 70 is as shown in FIG. Here, the length of the dummy head portion 77 is 305 mm, the length of the first chain 73 is 1135 mm, and the length of the second chain 71 is 8720 mm. The thickness of the first and second chains 73 and 71 is 68 to 71 mm.

On the other hand, the appearance of the roll inspection apparatus 100 of the present invention mounted on the dummy bar 70 replaced in place of the dummy head portion 77 is as shown in FIG. The roll inspection apparatus 100 is 580 mm, and the position from the connection portion of the first chain 73 and the second chain 71 to the roll gap measuring sensor 13 is 1645 mm. Therefore, in this case, the roll gap of the segment 1 through which the dummy head portion 77 passes and the segment 1 immediately before the passage are stepwise within the range in which the dummy bar 70 can be pulled out when the dummy bar 70 is pulled out. A separate tracking mode is required to change to 67.5mm.

As described in detail above, the roll inspection apparatus of the thin slab continuous casting machine of the present invention is connected to the dummy bar to measure the roll gap and the roll rotation state while passing between the segments of the thin slab player. Therefore, in producing the thin slab, there is an advantage that the quality of the thin slab can be improved by detecting an accurate roll gap and roll rotation state.

Although the technical idea of the roll inspection apparatus and the inspection method of the thin slab continuous casting machine of the present invention has been described with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is 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 (3)

In the roll inspection device for inspecting the state of the roll installed in the continuous casting machine for casting molten steel discharged from the mold, A sensor unit for measuring roll gap and roll rotation state information while passing between the rolls of the continuous casting machine during non-casting; And a control unit connected to a dummy bar passing between rolls of the continuous casting machine during non-casting and hinged with the sensor unit to receive an electrical signal output from the sensor unit and analyze the information of the roll. Roll inspection device. The method of claim 1, The sensor unit has a plurality of roll gap measurement sensor for measuring the gap between the roll of the continuous casting machine, a plurality of roll rotation failure detection sensor is installed between the roll gap measurement sensor to measure the rotational state of the roll, It has a plurality of anvils elastically installed with springs so that the sensor unit can pass the force between the rolls and the same force as the repulsive force on the rolls. The control unit may include a roll gap amplifier box for processing a roll gap measurement signal output from the sensor unit, and a signal for converting a signal output from the roll gap amplifier box and a signal output from the roll rotation detection sensor into a digital signal. A central processing unit (CPU) for receiving a signal output from the D converter, the A / D converter, and analyzing roll gap and roll rotation state information; a wireless remote controller for wirelessly transmitting the analyzed information from the CPU; And a battery pack for supplying power to the CPU and the roll gap amplifier box. In the method of inspecting the state of the roll while passing between the rolls installed in the continuous casting machine for casting molten steel discharged from the mold, Measuring the roll gap and the roll rotation state with a measuring sensor while passing between the rolls of the continuous casting machine; A roll analysis step of analyzing the gap and rotation state of each roll of the continuous casting machine by receiving the roll gap information and the roll rotation state information measured from the measuring sensor; And transmitting the roll information to the roll information receiver installed around the continuous casting machine by wirelessly transmitting the roll gap and the roll rotation state analyzed in the roll analysis step.