KR20010029090A - Apparatus for auto-sensing the buckle in continuous heating line - Google Patents

Abstract

PURPOSE: An automatic buckle sensing apparatus of a continuous annealing line is provided to prevent plate fracture or roll mark by early and automatically sensing buckle generated on surface of steel plate during heat treatment process, thereby opening or closing rolls of a skin pass mill. CONSTITUTION: The automatic buckle sensing apparatus of a continuous annealing line comprises a roll part (10) sensing buckle defects during passing of the steel plate by rotationally assembling upper and lower rolls (12,14) each of which is contacted with upper and lower surfaces of the steel plate between a pair of upper and lower bearing blocks (11a,11b,13a,13b); a body part generating upper and lower vibrations during passing of buckle defected parts by having upper and lower springs (36a,36b,37a,37b) with socket bolts (34a,34b) of sleeves being a boundary, wherein cylindrical sleeves (32a,32b) are installed on upper sides of bearing bases (31a,31b) of each upper bearing blocks (11a,11b), and hollow spring cases (33a,33b) into which the sleeves are inserted are installed on a support beam which is installed in a width direction of the steel plate; and a plurality of position sensors (40a,40b) transmitting a sensing signal to a main operation room by sensing upper and lower vibrations generated during passing of the defected buckle parts, wherein the position sensors are installed lower surface of the support beam, and the bearing bases (31a,31b) are connected with end parts of connection wires (41) fetched to lower side from the position sensors.

Description

Automatic buckle detecting device of continuous annealing line {APPARATUS FOR AUTO-SENSING THE BUCKLE IN CONTINUOUS HEATING LINE}

The present invention continuously detects the buckle generated on the surface of the steel sheet during the heat treatment process in the continuous annealing line to open and close the roll of the temper mill continuously to prevent breakage and roll marks It relates to a line buckle automatic detection device.

In general, a cold rolling facility of an ironworks is to produce the final product through the cold rolled material by electroplating, continuous annealing, temper rolling, and correcting work, as shown in FIG. It consists of the furnace part 5 which heat-processes the steel plate used in an annealing furnace, and the exit part 7 which rolls the steel plate rolled material in several rough rolling mills 7a and 7b. Reference numeral 6 is a looping tower.

In the case of rolling a steel sheet of ultra-thin material having a thickness of 0.15 to 0.8 mm in such a cold rolling facility, the thickness deviation portion of the steel sheet intensifies tension and heat during the heat treatment at a high temperature of 750 to 800 ° C. in the annealing furnace of the furnace 5. When a line trouble occurs or a line trouble occurs, a buckle defect occurs on the surface of the steel sheet due to line speed reduction.

On the other hand, when the steel sheet in which the buckle defect part is generated is advanced to the temper rolling mill 7a (7b) side of the exit part 7 as it is, the upper and lower back-up rolls, work of the temper rolling mill 7a (7b) through which the steel sheet passes. Since the rolls 3 and 4 hold the steel sheet at a constant rolling reduction amount, there is a high possibility that plate breaking occurs when the steel sheet having the buckle defect portion passes through the rough rolling mills 7a and 7b. If break occurs, there is a problem that the line is stopped to reduce the work productivity.

In addition, a mark is formed on the work roll surface of the temper mills 7a and 7b to generate a defective part such as a roll mark on the surface of the rolled steel sheet, as well as irregularities on the roll surface, thereby replacing the roll with a new one. must do it.

Therefore, in the related art, the main driver of the main cab and the field operator of the rolling equipment consisted of three persons, and the buckle defect of the steel plate was visually monitored through a monitoring monitor installed in the main cab. That is, when the main operator of the main cab confirms through the monitor that the buckle defect is generated on the surface of the steel sheet, the field operator opens the gap between the work rolls 4 of the temper mills 7a and 7b to generate the buckle defect. After passing the steel sheet as it was, the opened work roll 4 was closed to its original position and normal operation was resumed.

However, since the monitoring of the occurrence of the buckle and the passing of the generated buckle failure part are all performed by hand, the productivity is reduced, and the main driver of the main cab is performing other tasks in parallel, so When it is not confirmed, the buckle portion passes through the rough mills 7a and 7b, causing the above problems, causing many problems.

The present invention has been made in view of such a conventional problem, the object of the present invention is to find the buckle defects generated on the surface of the steel sheet in the early stage of the heat treatment process to automatically open / chloro work quickly during the temper rolling operation An object of the present invention is to provide an automatic buckle detection system for continuous annealing lines that can prevent sheet breakage and roll marks.

1 is a conventional working state for monitoring the buckle generating portion generated in the general rolling process equipment,

Figure 2 is an installation state showing an automatic buckle detection device of the continuous annealing line according to the present invention,

Figure 3 is an assembly configuration showing an automatic buckle detection device of the continuous annealing line according to the present invention.

* Explanation of symbols for the main parts of the drawings *

7a, 7b ....... Quenching Mill 11a, 11b ..... Upper Bearing Block

12 ....... upper roll 13a, 13b ..... lower bearing block

14 ....... lower roll 31a, 31b ..... bearing base

32a, 32b ... sleeve 33a, 33b ..... spring case

34a, 34b ...... Socket bolt 36a, 36b ..... Upper spring

37a, 37b ... lower spring 38a, 38b ..... fixed shaft

39 ........ Support beam 40a, 40b ..... Position sensor

As a technical configuration for achieving the above object, the present invention,

In the equipment for rolling a steel sheet equipped with an annealing furnace for heat-treating the steel sheet and a plurality of temper rolling mill passing through the heat-treated steel sheet,

A roll unit for rotatably assembling the upper and lower rolls respectively contacting the upper and lower surfaces of the steel sheet between a pair of upper and lower bearing blocks to detect a buckle defect when passing the steel sheet;

Cylindrical sleeves are installed on the upper surface of the bearing base of each of the upper bearing blocks, and a hollow spring case into which the sleeves are inserted is installed on the support beam installed in the width direction of the steel plate, and is bounded by the socket bolts of the sleeves. A main body portion having upper and lower springs to generate upper and lower vibrations when a defective buckle is passed; And

A plurality of position sensors installed on the lower surface of the support beam and connected to the bearing base leading to the bearing base to detect the vertical vibration generated when the buckle is defective and transmit a detection signal to the main cab. By providing a buckle automatic detection device of a continuous annealing line characterized in that.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an installation state diagram showing the automatic buckle detection device of the continuous annealing line according to the present invention, Figure 3 is an assembly configuration showing the automatic buckle detection device of the continuous annealing line according to the present invention, as shown The apparatus 1 of the present invention is installed at the inlet side of the roofing tower 6, and the buckle defect part, which is a defect portion generated on the surface of the steel sheet, which proceeds in the course of advancing the steel plate to the roofing equipment 6 side after the heat treatment in the annealing furnace, in one direction. As an early detection, this device 1 is composed of a roll portion 10, a body portion 30, a position sensor 40a, 40b, and the like.

That is, the roll part 10 is provided with upper and lower rolls 12 and 14 so as to be in contact with the upper and lower surfaces of the steel plate which proceeds in one direction on the outer surface, so as to sensitively detect the occurrence of a buckle defect when passing the steel sheet. The upper roll 12 is rotatably installed at both ends of the roll shaft between a pair of upper bearing blocks (11a) (11b), the lower roll 14 is a roll member for supporting a steel plate traveling in one direction from the bottom, Both ends of the roll shaft are rotatably installed between the pair of lower bearing blocks 13a and 13b fixed to the bottom surface. Accordingly, the steel sheet traveling in one direction by the lower roll 14 is prevented from sagging downward or vibrating up and down.

In addition, the main body portion 30 to generate the upper and lower vibrations when passing through the steel sheet in which the buckle failure is generated is a bearing base (31a) (31b), each of which the upper bearing blocks (11a) (11b) is mounted, and a plurality of upper surfaces Cylindrical sleeves 32a and 32b vertically installed as two fastening members 32 and vertically installed as a plurality of fastening members 33 in the support beam 39 crossing in the width direction of the steel plate. 32a and 32b are provided with hollow spring cases 33a and 33b into which the inner holes are inserted.

Socket bolts 34a on the upper ends of the sleeves 32a and 32b inserted into the spring cases 33a and 33b to facilitate disassembly and assembly of the sleeves 32a and 32b and the spring cases 33a and 33b. ) 34b is mounted, and the upper springs 36a and 36b and the lower springs 37a and 37b each having a predetermined elastic restoring force are installed inside the spring cases 33a and 33b. On the other hand, the lower springs (37a) (37b) is supported by being fitted to the fixed shaft (38a) (38b) is mounted on the upper end of the sleeve (32a) (32b). At this time, the upper and lower ends of the fixed shafts 38a and 38b do not contact the lower surface of the support beam 39 during vertical vibration of the bearing bases 31a and 31b according to the detection of the buckle defect. 36a) and 36b are shorter than the formation length.

In addition, the position sensors 40a and 40b for detecting the vertical vibration generated when passing the steel sheet in which the buckle defect is generated are mounted in a pair of left and right, respectively, on the lower surface of the support beam 39a, and the sensors 40a and 40b. Each of the connecting line 41 drawn out from the bottom is fixed to the end of the bearing base (31a) (31b) moving up and down when detecting the buckle defect, while the connecting line 41 is a position sensor (40a) (40b) A pulling force upward is always received by a winding member such as a spring (not shown) provided therein. As a result, the position sensors 40a and 40b detect the up and down vibration generated when the steel plate having the buckle defect is passed, and transmit a detection signal to the main cab, and according to the up and down vibration which is the received detection signal in the main cab. By calculating the length of the buckle failure portion, the gap between the work rolls 4 is controlled so that the steel sheet on which the buckle failure portion is generated passes through the rough rolling mills 7a and 7b.

Here, the elastic force of the upper and lower springs 36a, 36b, 37a, 37b is the connection line 41 of the position sensor 40a, 40b so that the surface of the upper roll 12 is always in contact with the steel sheet surface. Should be set greater than the pulling force.

The operation of the present invention having the configuration as described above will be described.

Since the apparatus 1 of the present invention is installed at the entrance side of the roofing tower 6 so as to detect the occurrence of a buckle defect after entering the roofing tower 6 after the steel sheet has been heat treated, the heat treated steel sheet has a bottom surface. It is fixedly installed in the lower roll 14 for supporting the steel plate to proceed in one direction and the upper roll 12 for detecting the buckle defect while passing through the surface contact.

At this time, when a problem occurs during the annealing operation of heat treatment of the steel sheet and the steel sheet with the buckle defect is generated on the surface, the steel sheet surface is crushed by the buckle defect portion between the upper and lower rolls (12, 14) The upper roll 12 vibrates up and down by the thickness change of the steel sheet because it passes through the surface contact.

In addition to the vertical vibration of the upper roll 12, the upper bearing blocks 11a and 11b at both ends thereof also vibrate up and down, thereby vibrating the bearing bases 31a and 31b mounted thereon up and down, and the bearing base 31a. The sleeves 32a and 32b mounted on the blade 31b also vibrate up and down. That is, the upper and lower springs 36a, 36a, 37a, 37b in the spring casings 33a, 33b are contracted by the upward force when the sleeves 32a, 32b are raised by the vertical vibration. The upper and lower springs 36a, 36a, 37a and 37b are freely inflated by the elastic restoring force to return the upper roll 12 to its original position.

In addition, since the connecting line 41 of the position sensors 40a and 40b, whose tip is connected to the upper surface by the vertical vibration of the bearing bases 31a and 31b, also moves up and down by the built-in spring, the buckle failure The up and down vibration movement of the upper roll 12 according to the passage of the negative, and the detection signal detected by the position sensors (31a) (31b) is transmitted to the main cab. In addition, when the steel sheet having the buckle defect part enters the roofing tower 6 by passing between the upper and lower rolls 12 and 14, the upper and lower vibrations of the upper roll 12 are stopped and the position sensor 40a ( The sensing operation by 40b) does not occur.

Accordingly, the main cab is generated on the surface of the steel sheet on the basis of the time from the start of the first transmitted detection signal to the end of the detection signal according to the upper and lower rolls 12 and 14 of the buckle failure portion and the steel sheet traveling speed. You can calculate the length of the buckle.

And when the steel plate which has a buckle defect part arrives at the bridle roll 4 provided in the entrance side of the temper mill 7a, 7b, the quick gap which opens the gap between the work rolls 4 of the temper mill 7a, 7b. After passing the buckle defect part between the work rolls 4 opened by the open operation, the quick closing operation is carried out between the work rolls 4 of the rough rolling mills 7a and 7b opened for the normal rolling operation. Continue.

That is, when the buckle defect is detected by the position sensors 40a and 40b for detecting the up and down vibration of the detection roll 12, the main cab generates an alarm indicating the detection of the buckle defect and at the same time the length of the buckle defect is formed. Start saving it. At this time, in preparation for a malfunction of the position sensors 40a and 40b, an on / off switch may be provided in the main cab. When the buckle defect reaches the braid roll 5, the polisher for importing the upper and lower backup rolls is separated from the roll by the quick-open start signal transmitted from the main cab, and the anti-clamping roll and the anti-cross bow roll are removed. It is possible to pass the steel plate having the buckle defect portion as it is between the work roll (4) to be completed is the fall of the.

On the other hand, when all of the buckle defects are passed, between the work rolls 4 which have been opened by the quick-opening operation by the quick-close start signal transmitted from the main cab is retracted, and the anti-clamping rolls and anti-rolls are lowered for restarting. The bow rolls are raised respectively, and when the polisher is pulled in, restart the exit line and resume the normal rolling operation.

According to the present invention having the configuration as described above, by detecting the upper and lower vibrations of the upper roll vibrating up and down as the position sensor early when passing the steel plate formed with the buckle defect, the buckle defect based on the detection signal transmitted to the main cab After calculating the length of the part, the gap between the work rolls can be automatically opened and quick-closed so that the buckle defect does not come into contact with the roll of the temper mill. It prevents plate breakage and roll mark by preventing contact between part and roll.

In addition, when the buckle defect is passed, the line deceleration operation and the manual delay operation by the conventional manual operation are prevented, and the automatic operation is performed by the single operator, thereby improving the line work productivity and operation efficiency.

Claims (2)

In the equipment for rolling a steel sheet equipped with an annealing furnace for heat-treating the steel sheet and a plurality of temper rolling mill (7a) (7b) through which the heat-treated steel sheet passes, The upper and lower rolls 12 and 14, which are in contact with the upper and lower surfaces of the steel sheet, respectively, are rotatably assembled between a pair of upper and lower bearing blocks 11a, 11b, 13a, and 13b. Roll unit 10 for detecting a buckle defect; And, Cylindrical sleeves 32a and 32b are provided on the upper surfaces of the bearing bases 31a and 31b of the upper bearing blocks 11a and 11b, and the support beams 39 are installed in the width direction of the steel plate. Hollow spring cases 33a and 33b into which the sleeves 32a and 32b are inserted are installed, and the upper and lower springs are bounded by the socket bolts 34as and 34b of the sleeves 32a and 32b. A main body 20 having 36a, 36b, 37a, 37b for generating up and down vibrations upon passing of the buckle failure; And It is installed on the lower surface of the support beam 39, and connected to the bearing base (31a) (31b) leading to the leading end of the connecting line (41) drawn to the bottom to detect the vertical vibration generated during the passage of the buckle failure to detect the detection signal Automatic detection device of the buckle of the continuous annealing line comprising a; a plurality of position sensors (40a, 40b) for transmitting to the main cab. The method of claim 1, The elastic force of the upper and lower springs 36a, 36b, 37a and 37b is above the connecting line 41 of the position sensors 40a and 40b so that the surface of the upper roll 12 is always in contact with the steel plate surface. Buckle automatic detection device of the continuous annealing line, characterized in that it is set larger than the pulling force.