KR100862035B1 - Roll defect auto detection apparatus - Google Patents

Abstract

Automatic detection device for rolling roll defects according to the present invention is horizontal by a roll fixing stand on which a rolling roll for surface measurement is mounted, a position control unit installed on the roll fixing stand, a horizontal position control motor and a vertical position control motor installed on the position control unit. And a vertical bar that is vertically moved, a sensor unit mounted at the bottom of the vertical bar, and a roll surface measurement data detected by the sensor unit for processing, recording and displaying the position control for controlling the horizontal position control motor and the vertical position control motor. And a user computer device for generating a signal, wherein the sensor unit includes a plate for coupling with the mobile unit, a body unit coupled to the plate with a spring, and a nonmetallic transfer wheel installed at both edges of the body unit; Ultrasonic induction coil and remote distance sensor of polyester material and built in the main body, and ultrasonic induction coil mounted in the lower part of the main body And stainless steel cladding to protect remote distance sensor.

Sensor part, ultrasonic guided coil, distance sensor, rolling roll, roll fixing stand, roll surface defect

Description

Roll defect auto detection apparatus

1 is an explanatory view of a rolling roll defect inspection working state using a conventional probe.

2 is an ultrasonic flaw detector for a conventional roll roll flaw detection.

3 is a defect detection state diagram according to a conventional probe method.

Figure 4 is a graph of the conventional rolling roll defect inspection results output.

5 is an overall perspective view of a rolling roll defect detection apparatus according to the present invention.

6 is a perspective structural diagram of a sensor unit for a detection device according to the present invention.

7 is an exploded perspective view of the sensor unit for a detection device of the present invention.

8 is an internal configuration diagram of a sensor unit for a detection device according to the present invention.

9 is an internal flaw detection state diagram of the rolling roll by the detection device of the present invention.

10 is a graph of detection result output by the detection device of the present invention.

※ Explanation of symbols about main part of drawing ※

1 rolling roll 2 ultrasonic flaw detector

3: probe 4: grinding oil
5: roll defect 6: roll fixing rack
10: sensor unit 11: transfer wheel
12: spring 13: coil clamp
14: guide shaft 15: cast bracket
16: main body 17: linear bearing
18: plate 20: position control unit
21: horizontal moving motor 22: vertical moving motor
23: actuator 24: shaft
27: vertical bar 28: motor control unit
29: gear box 31: ultrasonic guided coil
32: cover plate 33: remote distance sensor
34: outgoing connector 35: outgoing connector
36: fixing bolt 40: user computer

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The present invention relates to an apparatus for quickly identifying defects on the surface and surface of a steel mill rolling roll. The present invention relates to a rolling roll defect automatic detection device that can be automatically inspected.

In general, rolling rolls may have concave and convex marks caused by scales or foreign matters attached to bars and strips, and foreign matters in the cooling water, and the tail part may strike a work roll when the mail is passed (twisted). Phenomenon) A strong impact on the work roll may cause defects such as scratches and cracks on the roll.                         

As a way to detect defects in such rolls, it has conventionally been relied on manual labor by an operator.

1 shows a manual process in the conventional roll surface inspection. As referred to here, as shown in FIG. 1, the rolling roll 1 to be scanned is mounted on the roll holder 6, and then a large amount of grinding oil 4 is applied to the surface of the rolling roll and the probe ( 3) The ultrasonic flaw detector 2 is used for flaw detection, and the use of grinding oil is to prevent scratching of the rolling roll 1 and to prevent wear of the probe 3 and to obtain sensitive operating characteristics of the probe 3. .

However, this rolling roll flaw detection method not only takes a long time to apply the grinding oil to the roll, but also has a high possibility of malfunction or excessive flaw detection error due to the grinding oil layer 4, and a portable flaw detector 2 as shown in FIG. Since the operator carries and inspects a roll surface defect, etc., the operator's flaw detection work is inconvenient and the degree of flaw detection has appeared according to the skill of the operator.

In particular, the conventional roll flaw detection method is a method in which a small probe 3 is directly contacted with the surface of the rolling roll 1 for flaw detection. Thus, as shown in FIG. 3, the penetration area of the probe 3 is small and its penetration depth is small. In addition, the excessive work time was not enough, and the defects 5 inside the large roll 1 had a disadvantage in that no flaw was detected at all.

In addition, as shown in FIG. 4, the results of the flaw detection show only the degree of the defect on the monitor of the ultrasonic flaw detector 2 only in a graph, and thus, the operator has to check the naked eye at that time, so that the flaw detection of the flaw was also high.                         

Therefore, the surface defects, which are relatively small in size, are not found in advance and left unattended for a long time, which may cause a large accident such as roll breakage or separation during rolling.

The present invention is to solve the above problems in the conventional rolling roll defect detection method, an object of the present invention is to automatically and quickly measure the surface defects of the rolling roll using a distance sensor and ultrasonic guided coil It is to provide a rolling roll defect automatic detection device.

Rolling roll automatic detection device of the present invention is horizontal and horizontal by the roll fixing stand is equipped with a rolling roll for measuring the surface, the position control unit is installed on the roll fixing stand, the horizontal position control motor and the vertical position control motor provided in the position control unit Position control signal for controlling the horizontal position control motor and the vertical position control motor by vertically moving the vertical bar, the sensor unit mounted at the lower part of the vertical bar, and the roll surface measurement data detected by the sensor unit. It includes a user computer device for generating a, the sensor unit plate for coupling with the mobile table, the body portion coupled to the spring with the plate, the non-metallic transfer wheels installed on both edges of the body portion, the main body It is embedded in the part, and the ultrasonic induction coil and remote distance sensor made of polyester material, and the ultrasonic induction coil and circle It is characterized by consisting of a stainless steel cover plate for protecting the distance sensor.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

5 is a general configuration diagram of a device for measuring the rolling roll defect of the present invention.

As referred to herein, the detection apparatus of the present invention further includes a position control unit 20 in the roll fixing stand 6 on which the rolling roll 1 for surface measurement is mounted.

The position control unit 20 includes a shaft 24 connected to the axis of the horizontal position control motor 21, a gear box 29 moving horizontally by rotation of the shaft, and a vertically coupled and installed vertically in the gear box. It includes a bar 27, an actuator 23 for moving the vertical position of the vertical bar, and a vertical position control motor 22 for operating the actuator.

In addition, a motor control unit 28 is installed on the vertical bar 27.

The lower end of the vertical bar 27 is fixed to the sensor unit 10 which will move the surface of the rolling roll to be measured, the roll surface measurement data detected by the sensor unit 27 is input to the user computer 40 To be processed, recorded and displayed.

6 to 8 are views for explaining the internal and external structures of the sensor unit 27.

As referred to herein, the sensor portion 27 includes a plate 18 for coupling with the movable table, a body portion 16 coupled to the plate with a spring, and both edges of the body portion. The transfer wheel 11 installed in the main body, the ultrasonic induction coil 31 and the remote distance sensor 33, which is built in the main body portion, and is mounted to the lower portion of the main body for protecting the ultrasonic induction coil and the remote distance sensor It consists of the coating plate 32 of stainless material.

In more detail, the sensor unit 27 has four non-metallic transfer wheels 11 fixed to each of the guide shaft 14 and the cast bracket 15, and are mounted to the bottom of the apparatus. Coil clamps 13 are assembled on both sides of the main body 16 so that the internal sensor device, i.e., the ultrasonic guide coil and the remote distance sensor wood can be detachably attached.

In addition, the spring 12 of the durable material is combined with the linear bearing 17 is inserted between the body portion 16 and the plate 18 so as not to shake even in the case of excessive external impact.

The sensor unit 10 is equipped with an ultrasonic guided coil 31 and a remote distance sensor 33, and receives a receiving connector 35 and an outgoing connector 34 for receiving a power supply and control signal and outputting a detection signal. Equipped.

Four high information bolts to facilitate the detachment of the stainless cover plate 32 on the thin flexible flexible ultrasonic guide coil 31 made of a reinforcing polyester film material which allows the remote distance sensor 33 and the ultrasonic waves to be widely transmitted to the roll surface. Assemble with (36).

The user computer unit 40 may be designed as a touch screen capable of inputting and outputting all measured values and set values.

As described above, the operation of the apparatus of the present invention is as follows.

First, the dried roll 1 in the dried state is placed on the roll holder 6 and the position control unit 20 is operated by the motor control unit 28 so that the sensor unit 10 is positioned at the flaw detection position of the roll 1. do.                     

At this time, the user computer 40 receives the sensing value by the distance sensor of the sensor unit 10 and sends a control signal accordingly to the motor control unit 28 so that the motor control unit 28 operates the vertical position control motor 22. In this case, the actuators 23 are operated to allow the sensor unit 10 provided at the end of the vertical bar 270 to be in contact with the surface of the roll.

Then, the motor control unit 28 drives the horizontal position control motor 21 so that the vertical bar 27 is horizontally moved by the gearbox 29 so that the sensor unit 10 detects the roll surface along the surface of the roll. do.

That is, the analog signal detected by the remote distance sensor 33 is transmitted to the user computer 40 to indicate its information, and at the same time, the control signal is transmitted to the motor control unit 28 to decode the respective position control motors 22. By controlling the number of revolutions of the sensor 10 to set the position.

After the scanning operation to obtain the information of the measurement term rolling roll 1, the non-metallic transfer wheel 11 of the sensor unit 10 is lowered on the roll surface by the command of the user computer 40 and the roll is rotated. Ultrasonic waves for surface detection are simultaneously generated in the ultrasonic guide coil 31 while moving at a constant interval in the direction.

The ultrasonic wave is introduced into the outgoing connector 34 and the ultrasonic magnetic induction coil 31 passes through the process of being discharged to the receiving connector 35, and a strong magnetic field is emitted, as shown in FIG. 9. It is widely diverged by the ultrasonic guide coil 31 made of polyester film.

Accordingly, the surface detection on the roll can also be measured in a wide range, so that defects of a wide roll can be inspected quickly and accurately.

In particular, the ultrasonic waves of the strong magnetic field allow the measurement of deep defects inside the roll.

Defects detected during the inspection process, the position, size and depth of the degree is sent to the user computer 40, accurately calculated, processed and stored, and this information is transmitted to the subsequent roll polishing and processing equipment to the basis of the polishing process Is provided as information.

According to the present invention as described above, by using a remote distance sensor, a non-metallic transfer wheel, a cover plate, and the like provided on the sensor unit, an ultrasonic flaw detection is automatically performed by maintaining a proper distance on the surface of the rolling roll without a large amount of grinding oil. Therefore, it is possible to find the surface defects quickly and also send the information such as the defect location, the size of the defects and the depth of the defects to the user's computer immediately so that it can be accurate and speeded up in the future grinding and processing work.

In addition, the present invention makes it possible to store and manage the roll measurement data by the database, it is possible to track the roll history

Claims (1)

The roll fixing stand 6 on which the rolling roll 1 for surface measurement is mounted, the position control unit 20 installed on the roll fixing stand, the horizontal position control motor and the vertical position control motor installed in the position control unit And a vertical bar 27 that is vertically moved, a sensor unit 10 mounted to a lower end of the vertical bar, and a roll surface measurement data detected by the sensor unit to be processed and recorded and displayed, and the horizontal position control motor and A user computer device 40 for generating a position control signal for controlling the vertical position control motor, The sensor unit 10 includes a plate 18 for coupling with the movable table, a main body 16 coupled with a spring between the plate, and a non-metallic transport installed at both edges of the main body. The wheel 11, embedded in the body portion, and the ultrasonic induction coil 31 and the remote distance sensor 33 of the polyester material, and is mounted to the lower portion of the main body to protect the ultrasonic induction coil and the remote distance sensor Rolling roll defect automatic detection device, characterized in that consisting of a stainless steel cover plate (32).

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