KR20230127552A - Inspecting apparatus, equipment for inspecting having the same and inspecting method - Google Patents

Abstract

Inspection devices according to embodiments of the present invention include a test seat arranged so that a bearing to be inspected can be seated on an upper surface, and a first detector installed to detect a displacement value of a bearing positioned between the test seat and the test seat. In order to detect the vibration generated from the bearing located between the first judgment unit and the test seater, which first determines whether the bearing is defective by using the displacement value detected by the first detector and the preset reference displacement value Includes a second detector disposed facing the test seat and selectively operating according to the judgment result of the first determination unit and a second determination unit that secondarily judges whether or not the bearing is defective by using the vibration detected by the second detector. can do.
Therefore, according to embodiments of the present invention, the bearing is first inspected by a simple method of pressurizing the bearing and detecting a change in height of the bearing. And, if the bearing is judged to be defective in the primary inspection, additional secondary inspection is not performed. That is, if it is determined that the bearing is defective in the first inspection, the second inspection, which is more complicated and takes a long time than the first inspection, is omitted, and it is finally determined that the bearing is defective. Accordingly, the time required for inspecting the bearing can be shortened.

Description

Inspection device, inspection facility and inspection method including the same

The present invention relates to an inspection device, an inspection facility and an inspection method including the same, and more particularly, to an inspection device capable of reducing the time for inspecting a bearing, an inspection facility including the same, and an inspection method.

A casting device for casting a slab includes a plurality of segments for guiding a slab drawn from a mold in a casting direction. The segment includes a plurality of rolls arranged in one direction, and a bearing is connected between the plurality of rolls.

The bearing includes a hollow inner ring, an outer ring formed to extend from the outside of the inner ring in the circumferential direction of the inner ring, and a plurality of balls disposed between the inner and outer rings and arranged in the circumferential direction of the inner and outer rings.

On the other hand, as the use time or the number of uses of the bearing increases, at least one of the inner ring, the ball, and the outer ring may be damaged, such as wear. In addition, damage to the bearing is a factor that damages a device to which the bearing is connected, for example, a roll, or causes abnormal operation of the roll. Therefore, the bearing is periodically disassembled and inspected for damage.

Conventionally, as suggested in Korean Patent Registration No. 10-1485680, vibration generated from the bearing was detected to inspect whether the bearing was damaged. That is, in the related art, vibration generated by rotating the bearing is sensed, and the detected vibration is converted into a characteristic frequency of each of the inner ring, the ball, and the outer ring. In addition, the characteristic frequencies of each of the inner ring, ball, and outer ring were compared with the reference characteristic frequency to examine whether or not the bearing was damaged. That is, it was examined whether the bearing could be used further.

As such, in the related art, characteristic frequencies for all components provided in the bearing are detected and each is compared with a reference characteristic frequency for inspection. Accordingly, there is a problem in that it takes a long time to inspect the bearing.

Korea Patent Registration 10-1485680

The present invention provides an inspection device capable of reducing the time required to inspect a bearing, an inspection facility including the same, and an inspection method.

The present invention provides an inspection device capable of reducing the time required for inspection by reducing the step of inspecting whether or not a bearing is damaged using frequency characteristics, an inspection facility including the same, and an inspection method.

An inspection device according to an embodiment of the present invention includes an inspection seat arranged so that a bearing to be inspected can be seated on an upper surface; a first detector installed to detect a displacement value of a bearing positioned between the test seat and the test seat; a first judgment unit that firstly determines whether or not the bearing is defective by using the displacement value detected by the first detector and a preset reference displacement value; a second detector disposed to face the test seat and selectively operating according to a result of the determination in the first judgment unit so as to detect vibration generated in a bearing located between the test seat and the test seat; and a second determination unit that secondarily determines whether or not the bearing is defective by using the vibration detected by the second detector.

The first detector may include a pressing member disposed facing the test seater to move toward the bearing seated on the test seater to pressurize the bearing or move to the opposite side of the bearing; a first detection sensor disposed to face the pressing member so as to detect a displacement value of a bearing seated on the inspection seat; and a pressure measuring member mounted on the pressing member to measure the pressure applied by the pressing member to the bearing.

and a control unit controlling operations of the first and second detectors and first and second determination units, wherein the control unit controls the second detector and the second determination unit when the first determination unit determines that the bearing is normal. When the bearing is operated and the first determination unit determines that the bearing is defective, the second detector and the second determination unit may be controlled not to operate.

The second detector includes a second detection sensor disposed facing the test seat to detect vibration and selectively operated by the control unit according to a result of the determination by the first determination unit. A holder installed on the upper side of the inspection seat so that the first and second detection sensors can be mounted and ascended and descended, and the height of the lower surface of the first detection sensor is the lower surface of the second detection sensor. It may be mounted on the stage so as to be higher than the height of.

The upper surface of the inspection seat may include an inclined surface whose height decreases from both outer sides in the width direction toward the center.

An elevator connected to the test seat may be included to lift and lower the test seat.

A first fixture installed in front of the test seater to horizontally move to apply force to the bearing from the front side of the bearing seated on the upper surface of the test seater; a second fixture installed at the rear of the inspection seat to be inserted into the inner ring of the bearing moving backward by the operation of the first fixture to fix the vertical height of the inner ring of the bearing; and a horizontal mover installed at the rear of the inspection seat so as to horizontally move to apply force to the bearing from the rear of the bearing into which the second fixture is inserted.

Inspection equipment according to an embodiment of the present invention

inspection device; a carry-in unit disposed on one side of the inspection seat in a direction crossing the direction in which the first and second fixtures are disposed so that the bearing to be inspected can be seated on the upper surface; a first carry-out unit disposed on the other side of the inspection seat so that the bearings determined to be normal in both the first and second judgment units can be seated on the upper surface; a second carry-out unit disposed on the other side of the first carry-out unit so that the bearings determined to be defective by the first judgment unit and the bearings judged to be defective by the second judgment unit may be seated on an upper surface; and a pick-up unit capable of moving horizontally in a direction in which the carrying-in unit, the inspection seat, the first carrying-out unit, and the second carrying-out unit are arranged by supporting the bearing, and moving up and down.

Each of the carry-in unit, first and second carry-out units may include a seater extending in a direction in which the first and second fixtures are aligned so that the bearing can be seated on the upper surface; and a feeder fastened to the seater to support the bearing seated on the seater and slide along the seater.

The pick-up unit includes a pick-up unit having a pair of pick-up members arranged in a diametrical direction of the bearing so that the bearing can be positioned therebetween; and a pickup driver connected to the pickup to move the pair of pickup members closer to or farther from each other according to the diameter of the bearing to be inspected.

The inspection method according to an embodiment of the present invention includes a first inspection process of pressing the bearing from the lower side of the bearing and detecting a change in height of the bearing after pressing to determine whether the bearing is defective; and a second inspection process, which is selectively performed according to a result of the determination in the first inspection process, and inspects the bearing in a different way from the first inspection process.

The process of pressurizing the bearing includes a process of pressurizing the outer ring of the bearing, and in the primary inspection process, before the process of pressurizing the outer ring, the vertical heights of at least a part of other components other than the outer ring are fixed. It may include a process of fixing so that it can be fixed.

The first inspection process may include: detecting a first height (OH _nf ) of the outer ring of the bearing; Pressing the outer ring of the bearing by applying force in an upward direction to the outer ring of the bearing; Detecting the second height (OH _af ) of the pressurized outer ring; Calculating a height difference (OH _d ) between the first height (OH _nf ) and the second height (OH _af ); When the calculated height difference (OH _d ) is less than or equal to a preset reference height difference (OH _s ), determining that the bearing is normal; and determining the bearing as defective when the calculated height difference (OH _d ) exceeds the reference height difference (OH _s ).

The fixing process may include fixing the inner ring so that the vertical height of the inner ring of the bearing may be fixed.

The process of pressurizing the outer ring may include measuring a pressure applied to the outer ring; and adjusting the measured pressure to be a preset reference pressure. When the measured pressure reaches a preset reference pressure, a process of detecting the second height OH _af may be performed. there is.

When the bearing is determined to be normal in the first inspection process, the second inspection process may be performed.

The secondary inspection process may include rotating the inner ring of the bearing; and detecting vibration from the rotating bearing and using the detected vibration to determine whether or not the bearing is defective.

When the bearing is determined to be normal in the secondary inspection process, a process of finally determining that the bearing is normal and moving the bearing after the secondary inspection to a first transport position may be included.

when the bearing is determined to be defective in the first inspection, finally determining that the bearing is defective, and moving the bearing for which the first inspection has been completed to a second carrying position different from the first carrying out position; and when the bearing is determined to be defective in the secondary inspection, finally determining that the bearing is defective and moving the bearing for which the secondary inspection has been completed to the second transport position.

According to embodiments of the present invention, the bearing is first inspected by a simple method of pressurizing the bearing and detecting a change in height of the bearing. And, if the bearing is judged to be defective in the primary inspection, additional secondary inspection is not performed. That is, if it is determined that the bearing is defective in the first inspection, the second inspection, which is more complicated and takes a long time than the first inspection, is omitted, and it is finally determined that the bearing is defective. Accordingly, the time required for inspecting the bearing can be shortened.

In addition, if the bearing is determined to be normal in the first inspection, the bearing can be inspected more accurately by additionally performing the second inspection.

1 is a cross-sectional view showing a general bearing to be inspected using an inspection facility according to an embodiment of the present invention.
2 is a three-dimensional view of an inspection facility according to an embodiment of the present invention.
FIG. 3 is a three-dimensional view of FIG. 2 viewed from the 'A' side.
FIG. 4 is an enlarged view of 'C' in FIG. 2 .
5 is a three-dimensional view illustrating a pick-up unit connected to a guide of a test device according to an embodiment of the present invention and a carry-in unit located below the pick-up unit.
6 and 7 are three-dimensional views illustrating a detection unit according to an embodiment of the present invention.
8 is a front cross-sectional view of the detection unit shown in FIGS. 6 and 7 .
9 is a diagram conceptually illustrating a method of detecting a height of an outer ring of a bearing using a first detector according to an embodiment of the present invention.
10 is an example of detection characteristic frequencies of an inner ring and a ball acquired by a converting unit of a second judgment unit according to an embodiment of the present invention.
11 is a flowchart illustrating a method of inspecting a bearing using an inspection facility according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments will complete the disclosure of the present invention, and will fully cover the scope of the invention to those skilled in the art. It is provided to inform you. In order to explain the embodiments of the present invention, the drawings may be exaggerated, and the same reference numerals in the drawings refer to the same components.

1 is a cross-sectional view showing a general bearing to be inspected using an inspection facility according to an embodiment of the present invention.

First, bearings will be described with reference to FIG. 1 .

As shown in FIG. 1, the bearing B is a hollow inner ring 12 having an open or open center, and an outer ring 11 extending from the outside of the inner ring 12 in the circumferential direction of the inner ring 12. and a plurality of balls 13 each positioned between the inner race 12 and the outer race 11 and arranged side by side in the circumferential direction of the inner race 12 and the outer race 11.

These bearings (B) may be, for example, provided in a segment, for example, of the configuration of a casting apparatus for casting a cast steel. More specifically, the segments include a plurality of rolls that are aligned and arranged in one direction and rotate, respectively, and the bearings B may be connected between the plurality of rolls. At this time, a roll may be connected to the inner race 12 of the bearing B, and the bearing B may be operated together by the rotation of the roll. That is, when the roll rotates, the inner ring 12 of the bearing B rotates. Due to the rotational motion of the bearing B, the roll can be smoothly rotated while fixing its rotation axis.

Meanwhile, at least one of the ball 13, the outer race 11, and the inner race 12 may be damaged by the rotational operation of the bearing B. That is, at least one of the outer circumferential surface of the ball 13, the inner circumferential surface of the outer ring 11 with which the ball 13 is in contact, and the outer circumferential surface of the inner ring 12 may be worn or damaged.

Such damage to the bearing (B) may be a factor that causes or damages the operation of a part to which the bearing (B) is connected, for example, a roll. Therefore, it is necessary to periodically disassemble and inspect the bearing (B). And, if it is determined that it can no longer be used, it is necessary to replace it with a new bearing (B).

The present invention relates to an inspection facility, and more particularly, to an inspection facility capable of reducing the time required to inspect a bearing (B).

Hereinafter, an inspection facility according to an embodiment of the present invention will be described.

2 is a three-dimensional view of an inspection facility according to an embodiment of the present invention. FIG. 3 is a three-dimensional view of FIG. 2 viewed from the 'A' side. FIG. 4 is an enlarged view of 'C' in FIG. 2 .

2 and 4, the inspection facility includes a first detector 1300 equipped with a first detection sensor 1320 for measuring or detecting the height of the bearing B for the first inspection and for the second inspection. The detector 1000 includes a second detector 1400 having a second detection sensor 1420 for detecting or detecting vibration generated in the rotating bearing B.

In addition, the inspection facility uses the height of the bearing B detected by the first detector 1300 to determine whether the bearing B is defective, and the first determination unit 2000a determines whether the bearing is defective or not. When (B) is determined to be normal or good, not defective, it includes a second determination unit 2000b that secondarily determines whether or not the bearing B is defective by using the vibration detected by the second detector 1400.

And referring to FIGS. 2 and 3, the inspection equipment is arranged on one side of the detection unit 1000, and the carrying-in unit 3000, where the bearing B to be inspected is brought in and seated, the first inspection and the second inspection are judged normal. The first carrying out unit 4000 disposed on the other side of the detection unit 1000 so that the bearing (B) can be seated and carried out, and the bearing (B) judged to be defective in the first or second inspection is seated and A second delivery unit 5000 disposed on the other side of the first delivery unit 4000 may be included so as to be transported to the outside.

In addition, the inspection facility is a pick-up unit capable of moving in the direction in which the carrying-in unit 3000, the detecting unit 1000, the first carrying-out unit 4000, and the second carrying-out unit 5000 are aligned and supporting the bearing B ( 6000), and a guide part 7000 for moving the pick-up part 6000. In addition, the operation of the carry-in unit 3000, the pick-up unit 6000, the guide unit 7000, the first and second take-out units 4000 and 5000, the detection unit 1000, and the first and second decision units 2000b It may include a control unit 8000 for controlling.

In addition, the inspection facility includes a carrying-in unit 3000, a detection unit 1000, first and second output units 4000 and 5000, a base unit 9100 on which a guide unit 7000 is mounted, and a bearing (B) to be inspected. ) may be further included.

Among the configurations of the above-described inspection facility, a configuration including the detection unit 1000, the first determination unit 2000a, and the second determination unit 2000b may be referred to as an inspection device. That is, the inspection facility includes an inspection device, and the inspection device may be described as including the detection unit 1000, the first determination unit 2000a, and the second determination unit 2000b.

In addition, 'defect' determined by the first and second judgment units 2000a and 2000b may mean that the bearing B to be inspected is damaged and can no longer be used. In addition, 'normal' or 'good quality' judged by the first and second judgment units 2000a and 2000b means that the bearing B to be inspected is not damaged at all or is damaged but still usable. can mean

Hereinafter, each component of the inspection facility will be described. At this time, for convenience of explanation, the direction in which the carrying-in unit 3000, the detecting unit 1000, the first carrying-out unit 4000, and the second carrying-out unit 5000 are arranged is the first direction (X-axis direction) and the first horizontal direction. A direction intersecting or orthogonal to the direction is defined as the second direction (Y-axis direction). In addition, the vertical direction or vertical direction is defined as a third direction (Z-axis direction).

The base part 9100 is a means for supporting the carry-in part 3000, the detection part 1000, the first and second take-out parts 4000 and 5000, and the guide part 7000. As shown in FIGS. 2 and 3 , the base part 9100 has a carrying-in part 3000, a detecting part 1000, first and second carrying parts 4000 and 5000, a guide part 7000, etc. An upper member 9110 to be mounted or coupled thereto and a lower member 9120 mounted below the upper member 9110 to support the upper member 9110 may be included. In addition, a wheel 9130 may be mounted below the lower member 9120. The shape of the base part 9100 is particularly limited if the carry-in part 3000, the detection part 1000, the first and second take-out parts 4000 and 5000, and the guide part 7000 can be supported or mounted thereon. It doesn't work.

The guide unit 7000 is a means for moving the pickup unit 6000 in a first direction (X-axis direction). The guide unit 7000 includes, for example, a guide unit 7100 extending in a first direction from the upper side of the base unit 9100 as shown in FIG. 2 and a support unit connecting the guide unit 7100 and the base unit 9100 ( 7200) may be included.

The guide unit 7100 guides the movement of the pickup unit 6000 while providing a driving force so that the pickup unit 6000 can move in a first direction (X-axis direction). The guide unit 7100 includes, for example, a guide rail 7110 extending in a first direction (X-axis direction), a guide rail 7110 to slide along the guide rail 7110, and a pick-up unit (to be described below) 6000) may include a moving block 7120 fastened to connect (see FIG. 3). Here, the guide rail 7110 may be, for example, a means including a LM rail (Linear Motor rail), and the moving block 7120 may include a LM block (Linear Motor block) capable of sliding along the LM rail. can be Of course, the guide 7100 is not limited to the above example, and any means may be used as long as it can move the pick-up unit 6000 in the first direction (X-axis direction).

Supporters 7200 may be provided as a pair, and the pair of supporters 7200 may be installed to be connected to one end and the other end of the guide unit 7100.

5 is a three-dimensional view illustrating a pick-up unit connected to a guide of a test device according to an embodiment of the present invention and a carry-in unit located below the pick-up unit.

Hereinafter, a pickup unit 6000 according to an embodiment of the present invention will be described with reference to FIGS. 2, 3, and 5. At this time, the direction in which the guide unit 7100 is located in the second direction (Y-axis direction) is defined as forward, and the direction opposite to the guide unit 7100 is defined as rear.

The pickup unit 6000 is fastened to the pickup unit 6100 and the guide unit 7100 supporting the bearing B to move in a first direction (X-axis direction), and supports the pickup unit 6100 to perform the pickup unit 6100. An elevator 6200 capable of moving the machine 6100 up and down may be included. Also, the pickup unit 6000 may include a pickup driver 6300 that applies force to the pickup 6100 so that the pickup 6100 supports or fixes the bearing B.

The pickup 6100 may include a pair of pickup members 6110 and 6120 arranged in a first direction (X-axis direction) and spaced apart from each other. Each of the pair of pick-up members 6110 and 6120 may have a shape extending in a vertical direction (Z-axis direction) and may be arranged to face each other. And, as shown in FIGS. 2 and 3, the bearing (B) is positioned between the pair of pickup members (6110, 6120), and the inner surfaces of the pickup members (6110, 6120) facing each other are in contact with the outer circumferential surface of the bearing (B). Alternatively, when in close contact, the bearing B may be supported or fixed to the pick-up unit 6100. Therefore, the bearing B supported by the pick-up unit 6100 can be moved up and down or moved in the first direction by the lift-down or horizontal movement of the pick-up unit 6100 in the first direction.

The pickup driver 6300 may be a means for moving each of the pair of pickup members 6110 and 6120 in a first direction (X-axis direction) so that the pair of pickup members 6110 and 6120 become closer or farther apart from each other. . The pickup driver 6300 may be provided to be connected to a pair of pickup members 6110 and 6120, respectively. In addition, the pickup driver 6300 may be connected to the upper portion of the pair of pickup members 6110 and 6120. This pick-up actuator 6300 may be a means including, for example, a ball screw linear guide. Of course, the pickup driver 6300 is not limited to the above-described example, and any means may be used as long as it can move each of the pair of pickup members 6110 and 6120 in the first direction (X-axis direction).

A method of supporting the bearing B using the pickup 6100 will be described below. First, the separation distance between the pair of pick-up members 6110 and 6120 is adjusted to be greater than the diameter or diameter of the bearing B. At this time, it can be adjusted by moving the pair of pickup members 6110 and 6120 apart from each other using the pickup driver 6300. Next, the carrying unit 3000 is operated to move the bearing B located at the rear of the guide unit 7100 in the second direction (Y-axis direction), that is, forward where the guide unit 7100 is located. At this time, the bearing B seated in the carrying unit 3000 is moved to be positioned between a pair of pickup members 6110 and 6120 as shown in FIG. 2 . When the bearing B is positioned between the pair of pick-up members 6110 and 6120, the inner surface of each of the pair of pick-up members 6110 and 6120 may come into contact with the outer circumferential surface of the bearing B, that is, the outer ring 11. The separation distance between the pair of pickup members 6110 and 6120 is adjusted so as to be This can be adjusted by moving the pair of pickup members 6110 and 6120 closer to each other using the pickup driver 6300. Accordingly, the bearing B is supported or fixed to the pair of pickup members 6110 and 6120.

The elevator 6200 is a means for adjusting the height of the pickup 6100 and may be connected to the pickup driver 6300 as shown in FIG. 5 . More specifically, the pickup actuator 6300 may be installed to connect between the guide 7100 and the pickup actuator 6300 . The elevator 6200 moves between the guide rail 6210 and the pick-up actuator 6300 so as to slide along the guide rail 6210 extending in the vertical direction, that is, in the third direction (Z-axis direction), and along the guide rail 6210. It may include a moving block 6220 fastened to connect. Here, the guide rail 6210 may be a means including a linear motor rail (LM rail), and the moving block 6230 may be a means including a linear motor block (LM block). Of course, the elevator 6200 is not limited to the above example, and any means can be used as long as it can move the pickup 6100 up and down.

The bearing carrying unit 9200 is a means for seating a bearing to be inspected on the upper part of the carrying unit 3000 . Referring to FIG. 2, the bearing carrier 9200 is a carrier 9210 capable of supporting or gripping the bearing B to be inspected, and a first guide machine extending in a first direction (X-axis direction). 9220a, a second guide unit 9220b extending in a second direction (Y-axis direction) and having the first guide unit 9220a mounted thereon. As shown in FIG. 2 , the bearing transport unit 9200 may be installed to be positioned behind the guide unit 7000 to which the pickup unit 6000 is connected.

And the carrier 9210 may be a means including, for example, a hoist. That is, the transporter 9210 may be a means including a hook (h) capable of ascending and descending.

A brief description of how to support or grip the bearing B, which is an inspection target, on the carrier 9210 is as follows. First, prepare a rope and pass the rope through the central opening of the inner ring 12 of the bearing B to be inspected. Then, tie both ends of the rope and hang it on the hook (h) of the transporter (9210). As a result, the bearing B is supported or gripped by the transporter. Then, when the first guide unit 9220a slides along the second guide unit 9220b, the carrier 9210 mounted on the first guide unit 9220a moves in the second direction (Y-axis direction), that is, forward. go to In addition, when the carrier 9210 slides along the first guide 9220a, the position of the carrier 9210 in the first direction (X-axis direction) is adjusted.

In this way, the carrier 9210 is moved to be positioned on the upper side of the carrying unit 3000, and then the carrier 9210 is lowered and seated on the upper surface of the carrying unit 3000. Then, the rope is separated from the hook and the rope is separated from the bearing (B).

The carrying unit 3000 is a means for seating the bearing B, which is an inspection target, and moving it toward the guide unit 7000 or the pickup unit 6000. That is, the carrying unit 3000 moves the bearing B to be positioned between the pair of pickup members 6110 and 6120 as shown in FIG. 2 . Referring to FIG. 5 , the carry-in unit 3000 supports the carry-in seat 3100 extending in the second direction (Y-axis direction) and the bearing B so that the bearing B can be seated on the upper surface. The carry-in transporter 3200 fastened to the carry-in seater 3100 so as to slide along the machine 3100, and the carry-in seater 3200 to move the carry-in transporter 3200 in the second direction (Y-axis direction) It may include a carry-in driver 3300 installed in 3100.

An upper surface of the carry-in seat 3100 may be provided as an inclined surface. That is, the upper surface of the carry-in seat 3100 may be provided with an inclination in which the height decreases toward the center from both outer sides in the first direction (X-axis direction). The reason why the upper surface of the carry-in seat 3100 is provided as an inclined surface is to more stably support the bearing B having a circular shape.

The carry-in actuator 3300 may include a first actuator 3310 coupled to the load conveyor 3200 and a second actuator 3320 operating the first actuator 3310 .

The first driving body 3310 may be means including, for example, a ball screw linear guide. That is, the first driving body 3310 extends in the second direction (Y-axis direction) and has a screw formed on the outer circumferential surface of the shaft 3311 and the shaft 3311 so as to slide along the shaft 3311. It may include a moving block 3312 that is fastened and connected to the transporter 3200 and has a ball therein.

The second driving body 3320 may be connected to the first driving body 3310 to provide rotational power. And the second driving body 3320 may be a means including, for example, a motor. More specifically, the second driving body 3320 includes a motor 3323 that provides rotational power, a first pulley 3321 connected to the motor 3323 to rotate, and a second pulley 3322 connected to the shaft 3311. ), and a connecting member 3324 connecting the first pulley 3321 and the second pulley 3322. Here, the connecting member 3324 may be a ring-shaped belt installed to surround the outer circumferential surfaces of the first and second pulleys 3321 and 3322 .

According to the carry-in actuator 3300, the carry-in conveyor 3200 can move in the second direction (Y-axis direction) by the operation of the first actuator 3310 by the second actuator 3320. That is, when the motor 3323 operates and the first pulley 3321 rotates, the rotational power of the first pulley 3321 is transmitted through the connecting member 3324 and the second pulley 3322 to the first driving body 3310. ) is transmitted to the shaft 3311. When the shaft 3311 of the first actuator 3310 rotates, the moving block 3312 moves in the second direction (Y-axis direction) while being fastened to the shaft 3311. Accordingly, the transporter 3200 connected to the moving block 3312 can move in the second direction (Y-axis direction).

Of course, the load driver 3300 is not limited to the above example, and any means may be used as long as it can move the load conveyor 3200 in the second direction (Y-axis direction).

The carry-in conveyor 3200 is a means for pushing and moving the bearing B seated on the load seater 3100 in the second direction (Y-axis direction). To this end, the lower portion of the transporter 3200 may be engaged with the first driving body 3310 of the transporter 3300. That is, the transporter 3200 may be engaged with the moving block 3312 of the first actuator 3310 as shown in FIG. 5 . In addition, the carry-in conveyor 3200 may be installed to be positioned behind the pick-up unit 6000.

Referring to FIG. 5, the carry-in conveyor 3200 is a transfer member extending in the radial direction of the bearing B or the width direction (X-axis direction) of the carry-in seater 3100 so as to be in contact with the bearing B ( 3210) and a support member 3220 extending in the vertical direction to connect the transfer member 3210 and the moving block 3312 of the first driving body 3310. At this time, the support members 3220 may be provided as a pair to be aligned in the width direction (X-axis direction) of the transfer member 3210 . And one of the pair of support members 3220 connects one end of the transfer member 3210 and the moving block 3312, and the other support member 3220 connects the other end of the transfer member 3210 and the moving block 3312. ) may be provided to connect them.

The transporter 3200 moves in the second direction (Y-axis direction) by the operation of the transporter 3300. That is, the transporter 3200 moves toward the guide part 7000 (forward) or moves to the opposite side of the guide part 7000 (backward) according to the operation of the load driver 3300. At this time, the bearing B may be positioned between the pair of pick-up members 6110 and 6120 by the movement of the transporter 3200 forward toward the guide unit 7000. More specifically, first, the transporter 3200 is moved toward the other end of the one end and the other end of the loader 3100 located at the rear of the guide unit 7000, that is, to the rear. Then, the bearing B is seated on the upper surface of the loading and unloading device 3100 by using the bearing carrier 9200 . At this time, the bearing (B) is seated so as to be positioned in front of the transporter 3200. Then, the carry-in driver 3300 is operated to move the carry-in conveyor 3200 forward. Accordingly, the transfer member 3210 of the carry-in conveyor 3200 comes into contact with and adheres to the bearing B located in front thereof. Thereafter, the bearing B is pushed toward the guide part 7000 by the forward movement of the conveyor 3200 . That is, the bearing B advances toward the guide part 7000 . At this time, the operation of the carry-in driver 3300 is controlled so that the bearing B supported by the carry-in conveyor 3200 can move between the pair of pick-up members 6110 and 6120.

The first and second delivery units 4000 and 5000 may have the same or similar configuration as the above-described carrying unit 3000 . That is, each of the first and second delivery units 4000 and 5000 includes a delivery seater 4100 and 5100 extending in the second direction (Y-axis direction) so that the bearing B can be seated on the upper surface, and the bearing B ) to support and slide along the take-out seaters 4100 and 5100, the take-out conveyors 4200 and 5200 fastened to the take-out seaters 4100 and 5100, and the take-out conveyors 4200 and 5200 are set to the second Transport actuators 4300 and 5300 installed in the transport trays 4100 and 5100 may be included so as to move in the direction (Y-axis direction). Here, the take-out seaters 4100 and 5100, the take-out transporters 4200 and 5200, and the take-out actuators 4300 and 5300 of the first and second take-out units 4000 and 5000 are the take-in setters 3100 of the carry-in unit, respectively. , It may be provided with the same configuration, structure and shape as the carry-in transporter 3200 and the carry-in driver 3300.

Therefore, a detailed description of the first and second delivery units 4000 and 5000 will be omitted.

Hereinafter, a detection unit according to an embodiment of the present invention will be described.

6 and 7 are three-dimensional views illustrating a detection unit according to an embodiment of the present invention. 8 is a front cross-sectional view of the detection unit shown in FIGS. 6 and 7 .

Here, FIGS. 6 to 8 are views in which a portion of the base unit is omitted for convenience of description of the detection unit. In addition, FIG. 6 shows a state before the first stator moves toward the second stator and before the second stator is inserted into the inner ring of the bearing. 7 shows a state in which the first stator is moved toward the second stator and the second stator is inserted into the inner ring of the bearing.

6 to 8, the detection unit 1000 includes a test seat 1100 installed on the upper part of the base part 9100 so that the bearing B can be seated on the upper surface, and a second fixture on the bearing B. The first fixture (1200a) located in front of the test seater 1100 to apply force toward (1200b), the test seater 1100 so that it can be inserted into the inner ring 12 of the bearing (B) A second fixture (1200b) installed facing the first fixture (1200a) from the rear, and a first detection sensor (1320) for detecting the height of the bearing (B) for the primary inspection of the bearing (B) are provided. A first detector 1300 is included.

In addition, the detection unit 1000 includes a second detector 1400 equipped with a second detection sensor 1420 for detecting the vibration of the bearing B used for the secondary inspection, and the first and second detection sensors 1320 and 1420 ) and a horizontal mover (1200c) located after the test seat (1100) so as to apply force toward the first fixture (1200a) to the support (1500) and bearing (B) that can be raised and lowered while supporting the test seat (1200c). there is.

In addition, the detection unit 1000 is installed so that a part of the elevator 1600 and the second fixture 1200b connected to the lower part of the test seat 1100 can be accommodated so that the test seat 1100 can be moved up and down. A case 1230c may be included.

The inspection seat 1100 is installed on the upper part of the base part 9100 so as to be positioned between the first fixture 1200a and the second fixture 1200b in the second direction (Y-axis direction). In other words, it is installed on the upper part of the base part 9100 so as to be located on the lower side of the bearing B located between the first fixture 1200a and the second fixture 1200b. The inspection seat 1100 may have, for example, a rectangular plate shape. In addition, the upper surface of the inspection seat 1100 may be provided with an inclined surface as shown in FIGS. 6 and 7 . That is, the upper surface of the test seat 1100 may be prepared to include an inclined surface whose height decreases from both outer sides toward the center in the first direction (X-axis direction). By the inclined surface of the inspection seat 1100, the circular bearing B can be more stably supported.

Also, both outer edges of the upper surface of the test seat 1100 in the first direction (X-axis direction) may be a flat surface without an inclination. That is, both outer edge regions of the upper surface of the test seat 1100 in the first direction (X-axis direction) may be parallel to the upper member 9110 of the base part 9100 . Thus, the upper surface of the inspection seat 1100 can be described as including an inclined surface and flat surfaces that are both outer surfaces of the inclined surface. In this way, both outer edge areas of the upper surface of the inspection seat 1100 and the flat surface may be used as a reference surface in detecting the height of the bearing B in the first detector 1300 .

The elevator 1600 supports the lower portion of the test seat 1100 to raise or lower the test seat 1100 . That is, the test seat 1100 is raised or lowered according to the diameter or size of the bearing (B). The elevator 1600 includes a driving source 1610 located below the upper member 9110 of the base part 9100 to provide lifting power and an elevating member connecting the driving source 1610 and the inspection seat 1100. (1620). Also, the driving source 1610 and the elevating member 1620 may be installed to be positioned below the upper member 9110 of the base part 9100 as shown in FIGS. 6 and 7 . That is, the driving source 1610 and the elevating member 1620 may be installed to be positioned inside the lower member 9120 of the base part 9100.

In this way, by connecting the elevator 1600 to the lower part of the test seat 1100 so that the test seat 1100 can go up and down, even if the diameter or size of the bearing B to be inspected changes, the bearing B This is so that the inner ring 12 of ) faces the first and second fixtures 1200a and 1200b. That is, as the diameter of the bearing (B) is smaller, the height of the inspection seat (1100) is lowered using the elevator (1600) so that the inner ring (12) of the bearing (B) is moved to the first and second fixtures (1200a, 1200b). ) can be placed face to face. Conversely, as the diameter of the bearing (B) increases, the height of the test seat 1100 is raised using an elevator so that the inner ring 12 of the bearing (B) faces the first and second testers 1200a and 1200b. can do.

The elevator 1600 is not limited to the above example, and any means may be used as long as it is a means capable of moving the inspection seat 1100 up and down.

The first fixture 1200a moves the contact member 1210a extending in the radial direction of the bearing B or in the first direction (X-axis direction) and the contact member 1210a in the second direction (Y-axis direction). It may include a driving member (1220a) connected to the contact member (1210a) so as to be able to.

The adhesion member 1210a may have a plate shape extending in the first direction (X-axis direction). In addition, the length of the adhesion member 1210a in the first direction (X-axis direction) is preferably provided to be equal to or greater than the diameter of the bearing having the largest diameter among the bearings B of various diameters to be inspected. do. When the contact member 1210a is brought into close contact with the front surface of the bearing B to fix the bearing B, the contact member 1210a extends from the inner ring 12 to the outer ring 11 of the bearing B. in order to make contact.

Here, the front surface of the bearing B is a surface facing the contact member 1210a, and the rear surface of the bearing B means a surface facing the second fixture 1200b described later. can

In addition, as shown in FIGS. 6 and 7 , a plurality of adhesion members 1210a may be provided in different sizes. For example, two contact members 1211 and 1212 having different lengths in the first direction (X-axis direction) may be provided. Also, the two contact members 1211 and 1212 may overlap or overlap each other in the first direction (X-axis direction). In other words, the relatively short second contact member 1212 is located in front of the relatively long first contact member 1211 in the first direction relative to the second direction (Y-axis direction). can be arranged to do so. In addition, the driving member 1220a may be connected to each of the plurality of contact members 1211 and 1212 .

The driving member 1220a is a means for horizontally moving the adhesion member 1210a in the second direction (Y-axis direction). The driving member 1220a is a driving source 1221 located in front of the contact member 1210a to provide horizontal movement force and a driving source to horizontally move in the second direction (Y-axis direction) by the operation of the driving source 1221 ( 1221) and a moving member 1222 installed to connect between the contact member 1210a. The driving source 1221 of the driving member 1220a may include, for example, a cylinder, and the moving member 1222 may include a piston.

The first fixture 1200a as described above may be supported by a separately provided support 1700. At this time, the support 1700 supports the adhesion member 1210a and the drive member 1220a so that the adhesion member 1210a and the drive member 1220a can be spaced apart from the upper side of the base portion 9100. The support 1700 may be provided in a shape extending vertically, and a portion of the driving member 1220a, for example, the driving source 1221 may be mounted on the top thereof.

The second fixture 1200b is inserted into an opening provided in the center of the inner ring 12 of the bearing B to support or fix the inner ring 12 (see FIGS. 7 and 8 ). That is, it is a means for fixing the inner ring 12 so that the height of the inner ring 12 does not change during the configuration of the bearing B. The second fixture 1200b may be disposed behind the first fixture 1200a to face the first fixture 1200a. The second fixture 1200b is installed so that its height does not change and is fixed. For example, the second fixture 1200b may be fixedly installed to be connected to a rotator 1410 to be described later.

The second fixture 1200b includes an insertion member 1210b and an insertion member 1210b disposed facing the first fixture 1200a so that the second fixture 1200b can be inserted into the central opening of the inner ring 12 from the rear of the bearing B. It may include a connecting member (1220b) extending from the rear. Also, at least a portion of the connection member 1220b may be installed to be accommodated inside the case 1230c as shown in FIGS. 6 and 7 . And, the holder 1500 may be mounted on the top of the case 1230c.

Insertion member (1210b) may be provided in a shape corresponding to the central opening of the inner ring (12). That is, when the shape of the inner ring 12 or its central opening is circular, the insertion member 1210b may be provided in a cylindrical shape extending in the second direction (Y-axis direction). Also, the insertion member 1210b may be provided to have an outer diameter that allows its outer circumferential surface to come into contact with the inner circumferential surface of the inner ring 12 when inserted into the central opening of the inner ring 12 . This is to ensure that the inner ring 12 is supported and fixed by the insertion member 1210b when the insertion member 1210b is inserted into the central opening of the inner ring 12. To this end, the insertion member 1210b may be replaced and mounted according to the diameter of the bearing B to be inspected. At this time, since the insertion member 1210b is mounted on the connection member 1220b, it can be replaced with an insertion member 1210b having a different diameter and mounted on the connection member 1220b according to the diameter of the bearing B to be inspected. there is. In addition, without being limited thereto, when the insertion member 1210b and the connection member 1220b are made of one body, one component including the connection member 1220b and the insertion member 1210b may be replaced.

For inspection, the bearing B may be supported or fixed as shown in FIGS. 7 and 8 by the first and second fixers 1200a and 1200b as described above. The method of supporting or fixing the bearing B by the first and second fixing units 1200a and 1200b will be described in more detail as follows.

First, the bearing B in the carrying-in unit 3000 is supported or picked up by using the pickup unit 6000, and the pickup unit 6000 is moved to the upper side of the inspection seat 1100. Then, by lowering the pick-up unit 6000, the bearing B is seated on the inspection seat 1100 as shown in FIG. 6 .

Thereafter, the driving member 1220a is operated to move the adhesion member 1210a in the direction where the second fixture 1200b is located. When the adhesion member 1210a moves toward the second stator 1200b, the adhesion member 1210a comes into contact with the front surface of the bearing B. Further, when the contact member 1210a is further moved toward the second fixture 1200b, the bearing B moves toward the second fixture 1200b. That is, the bearing B is pushed towards the second stator 1200b. At this time, by controlling the operation of the driving member (1220a), as shown in FIGS. 7 and 8, the second fixing member (1200b) is inserted into the inner ring 12 of the bearing (B), so that the second fixing member (1210a) is inserted into the second. It moves toward the fixture (1200b). In other words, the adhesion member 1210a is moved toward the second stopper 1200b until the insertion member 1210b of the second stopper 1200b is inserted into the central opening of the inner ring 12.

Accordingly, the bearing B is fixed or supported by the first and second fixtures 1200a and 1200b as shown in FIGS. 7 and 8 . That is, fixed by the adhesion member 1210a applying force from the front of the bearing B to the front surface of the bearing B and the insertion member 1210b inserted into the inner ring 12 of the bearing B or supported In particular, the height of the second fixture 1200b is fixed in the vertical direction, and the insertion member 1210b of the second fixture 1200b is inserted into the inner ring 12 of the bearing B to make the inner ring 12 ) are supported. Accordingly, even when force is applied to the bearing B, the inner ring 12 does not move by the second fixture 1200b. That is, the height of the inner ring 12 is fixed without moving upward.

After fixing the bearing B using the first and second fixing devices 1200a and 1200b, an inspection is performed using a first detector 1300 described later. This is because when force is applied (pressing) to the outer ring 11 of the bearing B while the height of the inner ring 12 is fixed, the outer ring 11 moves depending on whether the bearing B is worn or damaged. In the embodiment, a primary inspection of the bearing B is performed using whether the outer ring 11 moves and the degree of movement (ie, displacement).

In addition, an inspection is performed using a second detector 1400 to be described later in a state in which the bearing B is fixed using the first and second fixers 1200a and 1200b. This is to perform the inspection using only the rotational force intentionally applied from the second detector 1400 in a state in which movement or shaking of the bearing B is minimized by external factors.

The horizontal mover 1200c is a means for separating the bearing B into which the insertion member 1210b of the second fixture 1200b is inserted from the insertion member 1210b. That is, the horizontal mover 1200c horizontally moves the bearing B toward the first fixture 1200a. The horizontal mover 1200a moves forward toward the test seater 1100 or vice versa by the operation of the drive source 1210c located at the rear of the test seater 1100 and the drive source 1210c to provide horizontal movement force. A moving member 1220c capable of moving backward in the direction may be included. The driving source 1210c of the horizontal mover 1200c may include, for example, a cylinder, and the moving member 1220c may include a piston.

Prior to the description of the first and second detectors 1300 and 1400, the first and second detection sensors 1320 and 1420 provided in the first and second detectors 1300 and 1400 are described with reference to FIG. 4 . The support stage 1500 will be described first.

The holder 1500 is a means for adjusting the height of the first and second detection sensors 1320 and 1420 while supporting the first and second detection sensors 1320 and 1420 . Referring to FIG. 4 , the holder 1500 includes an elevating member 1510 and an elevating member 1510 mounted on an upper portion of a case 1230c in which a part of the second fixture 1200b is accommodated to provide a driving force for elevating and descending. ) to the first fixture 1200a and may include a mounting member 1520 supporting the first and second detection sensors 1320 and 1420 . Also, the holder 1500 may include a proximity sensor 1530 mounted on the holder 1520 .

The elevating member 1510 is a guide rail 1511 extending in the vertical direction and a moving block ( 1512) may be included. Here, the guide rail 1511 may be, for example, a means including a LM rail (Linear Motor rail), and the moving block 1512 may include a LM block (Linear Motor block) capable of sliding along the LM rail. can be Of course, the elevating member 1510 is not limited to the above-described example, and any means may be used as long as the mounting member can be elevated and lowered.

The mounting member 1520 extends from the guide rail 1511 toward the first fixture 1200a, and from the first holder 1521 on which the second detection sensor 1420 is mounted and the second detection sensor 1420 to the second height. It may include a second cradle 1522 extending toward the regular 1200b and on which the first detection sensor 1320 is mounted.

A slit penetrating in a vertical direction may be provided in the first holder 1521, and the slit may be provided to extend in a second direction (Y-axis direction). In addition, the second detection sensor 1420 may be installed to pass through the slit provided in the first cradle 1521 in the vertical direction, and may be mounted or supported on the first cradle 1521 . Thus, the second detection sensor 1420 may be mounted so that its lower part protrudes downward from the first holder 1521 .

The second cradle 1522 may be connected to an upper portion of the second detection sensor 1420 . Also, the second holder 1522 may have a shape extending from an upper portion of the second detection sensor 1420 toward the first holder 1200a. Also, the first detection sensor 1320 may be installed to pass through the second cradle 1522 in the vertical direction and be mounted on the second cradle 1522 .

At this time, the first detection sensor 1320 and the second detection sensor 1420 are mounted so that their lower ends have different heights. That is, the height of the lower surface of the second detection sensor 1420 that detects the vibration is lower than the height of the lower surface of the first detection sensor 1320 . In other words, with the first cradle 1521 as a reference, the second detection sensor 1420 is more protruded to the lower side of the first cradle 1521 than the first detection sensor 1320 . In this way, the reason why the second detection sensor 1420 is protruded more than the first detection sensor 1320 is that the second detection sensor 1420 is in contact with the outer circumferential surface of the bearing B, that is, the outer ring 11. This is because vibration must be detected in , and at this time, the first detection sensor 1320 must be spaced apart from the outer ring 11 .

The proximity sensor 1530 may be a sensor capable of detecting whether the second detection sensor 1420 is in contact with the outer race 11 of the bearing B. That is, for the secondary inspection, the second detection sensor 1420 must detect the vibration generated in the bearing B, and for this, the second detection sensor 1420 must come into contact with the outer circumferential surface of the outer ring 11. Accordingly, the elevating member 1510 is operated to lower the holding member 1520. At this time, when the proximity sensor 1530 is in contact with the outer ring 11 and a contact signal is generated, the second detection sensor 1420 moves the outer ring ( 11) is judged to have been in contact with. The proximity sensor 1530 may be a means including, for example, a touch sensor. In addition, the proximity sensor 1530 may be mounted below the first cradle 1521 . At this time, the proximity sensor 1530 may be mounted such that its lower surface has the same height as the height of the lower surface of the second detection sensor 1420 .

The first detector 1300 is a means used for primary inspection of the bearing B. 6 to 8, the first detector 1300 is located below the first and second fixtures 1200a and 1200b so that the bearing B can be pressurized from the lower side, and a pressing member capable of moving up and down ( 1310), a first detection sensor 1320 located on the upper side of the bearing B located between the first fixture 1200a and the second fixture 1200b to detect the height of the bearing B. can

In addition, the first detector 1300 is configured to measure the elevating member 1330 connected to the pressing member 1310 and the pressing force by which the pressing member 1310 presses the bearing B so as to provide an elevating driving force. A pressure measuring member 1340 installed on the pressing member 1310 may be included.

The pressing member 1310 may be installed below the first and second fixtures 1200a and 1200b as shown in FIG. 8 to be positioned between the first fixture 1200a and the second fixture 1200b. More specifically, the pressing member 1520 includes the contact member 1210a and the insertion member 1210a and the insertion member 1210a and the insertion member 1210b so as to face the outer ring 11 of the bearing B fixed and supported. (1210b) may be installed on the lower side. At this time, the pressing member 1310 may be installed so that one end (upper end) in the extension direction faces upward where the bearing B is located, and the other end (lower end) is connected to the elevating member 1330.

Meanwhile, as described above, the inspection seat 1100 is installed below the space between the first fixture 1200a and the second fixture 1200b. Accordingly, the pressing member 1310 may be installed to pass through a portion of the test seat 1100 in the vertical direction, as shown in the enlarged views of FIGS. 6 and 7 . To this end, the inspection seat 1100 may be provided with a hole or slit S formed to pass through in a thickness direction or a vertical direction.

The elevating member 1330 may be installed on the base part 9100 to be positioned below the pressing member 1310 . That is, the elevating member 1330 may be installed inside the lower member 9120 so as to be positioned below the upper member 9110 constituting the base part 9100 . The elevating member 1300 includes, for example, a driving source 1331 that provides a driving force for elevating and lowering, and an elevating member 1332 that is installed to connect between the lower end of the pressing member 1310 and the driving source 1331 and can move up and down. You can (see Figure 8).

The pressure measuring member 1340 is mounted on the pressing member 1310, and as shown in the enlarged views of FIGS. 6 and 7, it may be mounted on one end toward the bearing B, that is, on the upper end. Also, the pressure measuring member 1340 may be a means including a load cell. Of course, any means may be used as the pressure measuring member 1340 as long as it can measure the pressure (pressing force) applied by the pressing member 1310 to the bearing B.

When the pressure is measured by the pressure measuring member 1340, it may be transmitted to the controller 8000. And the controller 8000 compares the measured pressure with a preset reference pressure. Then, the controller 8000 controls the operation of the elevating member 1330 so that the measured pressure becomes the reference pressure. Then, when the measured pressure becomes the reference pressure, the controller 8000 operates the first detector 1300 to detect the height of the outer ring 11 .

The first detection sensor 1320 is disposed on the upper side of the first and second fixtures 1200a and 1200b so as to be located on the upper side of the bearing B. That is, the first detection sensor 1320 is supported on the support 1500 as shown in FIGS. 6 and 7 so as to be located on the upper side of the bearing B, which is supported and fixed by the contact member 1210a and the insertion member 1210b. The first detection sensor 1320 detects or measures the height of the outer ring 11 more specifically than the height of the bearing B.

At this time, the first detection sensor 1320 measures the height of the outer ring 11 (hereinafter, the height of the outer ring 11 in an unpressurized state) when the pressing member 1310 does not pressurize the bearing B, and , When the pressing member 1310 presses the bearing B, the height of the outer ring (hereinafter, the height of the outer ring 11 in a pressurized state) is measured. For example, the first detection sensor 1320 may be a means including a laser distance sensor.

Here, the height of the outer ring 11 may be, for example, the distance from the upper surface of the test seat 1100 on which the bearing B is seated to the upper surface of the outer ring 11 facing the first detector 1300. there is. More specifically, the height of the outer ring 11 is the upper surface of the test seat 1100 on both edges in the first direction (X-axis direction) and faces the first detection sensor 1320 from a flat surface without an inclination. It can be the distance to the top surface of the outer ring 11 you are looking at. That is, the reference surface (reference surface) for detecting the height of the outer ring 11 may be, for example, a flat surface that is an edge region of the upper surface of the upper surface of the inspection seat 1100 more specifically.

Of course, the reference surface for detecting the height of the outer ring 11 is not limited to the test seat 1100, and for example, the upper member 9110 of the base portion 9100 can be used. That is, the upper surface of the upper member 9110 on which the test seat 1100 is seated may be used as a reference surface for detecting the height of the outer ring 11. In this case, the height of the outer ring 11 may be the distance from the upper surface of the upper member 9110 to the upper surface of the outer ring 11 facing the first detector 1300 .

Then, the height of the outer ring, that is, the height of the upper surface of the outer ring 11 is measured using the first detection sensor 1320, which is detected using the separation distance between the first detection sensor 1320 and the outer ring 11. can do. That is, it can be detected by detecting the separation distance between the upper surface facing the first detection sensor 1320 and the first detection sensor 1320 of the outer circumferential surface of the outer ring 11 and converting it to the height of the outer ring 11. there is.

Accordingly, the shorter the separation distance from the outer ring 11 detected by the first detection sensor 1320, the higher the height of the outer ring 11 is detected, and the higher the distance between the outer ring 11 detected by the first detection sensor 1320. The longer the separation distance, the lower the height of the outer ring 11 is detected. And, in detecting the separation distance from the upper surface of the outer ring 11 using the first detection sensor 1320, the first detection sensor 1320 is positioned at a preset height and then detected. The height of the first detection sensor 1320 may be adjusted through the operation of the holder 1500 .

The first determination unit 2000a determines whether the bearing B is defective by using the height of the bearing B detected by the first detector 1300, that is, the height of the outer ring 11. That is, the first determination unit 2000a determines the height of the outer ring 11 in an unpressurized state (OH _nf ) and the height (OH _af ) of the outer ring 11 in a pressurized state detected by the first detection sensor 1320. It is used to determine whether the bearing (B) is defective. The first determination unit 2000a is a calculation unit that calculates a height difference (OH d ) between the height (OH _nf ) of the outer _ring 11 in an unpressurized state and the height (OH _af ) of the outer ring 11 in a pressurized state. (2100a), the calculated height difference (OH _d ) is compared with a preset reference height difference (OH _s ) (reference displacement value (OH _s )) to determine whether or not the bearing (B) is defective 1st A processing unit 2200a may be included.

Hereinafter, referring to FIG. 9 , a method of firstly inspecting a bearing using the first detector 1300 and the first judgment unit 2000a will be described. At this time, as a reference surface for detecting the height of the outer ring, a flat surface, which is both edge areas in the first direction, of the upper surface of the inspection seat will be described as an example.

9 is a diagram conceptually illustrating a method of detecting a height of an outer ring of a bearing using a first detector according to an embodiment of the present invention. Here, FIG. 9 exemplarily shows a case where the inner circumferential surface of the outer ring of the bearing is damaged. And FIG. 9 expresses the extent of damage to the inner circumferential surface of the outer ring in an extreme way for convenience of explanation.

When the bearing (B) is seated on the test seat 1100, the first detection sensor 1320 is adjusted to a preset height. Next, the separation distance between the first detection sensor 1320 and the outer ring 11 is detected and converted into the height of the outer ring 11 . Accordingly, the height OH _nf of the upper surface of the outer ring facing the first detection sensor 1320 is detected. That is, the height OH _nf of the outer ring 11 in an unpressurized state is detected (see FIG. 9(a)). Here, the height (OH _nf ) of the outer ring 11 in an unpressurized state may be referred to as the height (OH _nf ) or the first height (OH _nf ) of the bearing (B) in an unpressurized state.

Subsequently, the pressing member 1310 is raised by using the elevating member 1330 . At this time, as shown in (b) of FIG. 9, the pressure measuring member 1340 coupled to one end of the pressing member 1310 is raised until it contacts the outer ring 11 of the bearing B. In addition, the operation of the elevating member 1300 is controlled so that the pressure measured by the pressure measuring member 1340 becomes the reference pressure.

When the pressure measured by the pressure measuring member 1340 becomes the reference pressure, the height OH _af of the outer ring 11 is detected using the first detection sensor 1320 . That is, the first detection sensor 1320 detects the distance between the first detection sensor 1320 and the outer ring 11 and converts it into the height of the outer ring 11 . Accordingly, the height OH _af of the upper surface of the outer ring 11 facing the first detection sensor 1320 is detected. That is, the height OH _af of the outer ring 11 in a pressurized state is detected (see (b) of FIG. 9 ). Here, the height (OH _af ) of the outer ring 11 in a pressurized state may be referred to as the height (OH _af ) or the second height (OH _af ) of the bearing B in a pressurized state.

The first determination unit 2000a uses the height (OH _nf ) of the outer ring 11 in an unpressurized state and the height (OH _af ) of the outer ring 11 in a pressurized state detected by the first detection sensor 1320 Prior to explaining the method of determining whether the bearing B is defective, the reason why the height difference occurs before and after pressing will be first described.

When the inner circumferential surface of the outer ring 11 and the ball 13 constituting the bearing B are not damaged, the outer circumferential surface of the ball 13 contacts the inner circumferential surface of the outer ring 11 as shown in FIG. 1 . That is, ideally, there is no or very small gap between the ball 13 and the inner circumferential surface of the outer ring 11. However, when at least one of the inner circumferential surface of the outer ring 11 and the outer circumferential surface of the ball 13 constituting the bearing (B) is worn or damaged, as shown in FIG. ), that is, a gap (g) may exist between them. Therefore, a difference in height of the outer ring 11 may occur before and after pressing. As shown in (a) of FIG. 9, the case where the inner circumferential surface of the outer ring 11 is worn or damaged is described as follows.

When the bearing (B) is pressurized by raising the pressing member 1310, the outer ring 11 is pushed upward. At this time, for example, when the inner circumferential surface of the outer ring 11 is worn and a gap g exists between the inner circumferential surface of the outer ring and the ball, the gap acts as the floating or movable space. Accordingly, when the outer ring 11 is pressurized by raising the pressing member 1310 from the lower side of the outer ring 11, the outer ring 11 can be raised or pushed a predetermined distance in the opposite direction to the pressing member 1310, that is, upward. there is.

At this time, the inner ring 12 does not move because it is fixed by the insertion member 1210b of the second fixture 1200b. That is, the position of the inner ring is fixed so as not to move vertically by the second holder 1200b. Thus, when the pressing member 1310 applies an upward force to the bearing B, that is, the outer ring 11 (pressing), the entire bearing B may not move, but the outer ring 11 may move, and at this time At least the inner ring 12 may not move upward.

Therefore, when the outer ring 11 of the bearing B is not pressurized using the pressing member ₁₃₁₀ , the outer ring 11 of the bearing B is When pressurized, the height of the inner ring (IH _af ) may be the same as shown in FIG. 9(a) and FIG. 9(b). Here, the heights (IH _nf , IH _af ) of the inner ring 12 are the distance between the flat surface, which is both edge areas of the upper surface of the test seat 1100 in the first direction, and the center of the inner ring 12 in the radial direction. can be

In the above, the heights (IH _nf , IH _af ) of the inner ring 12 have been described based on the center position of the inner ring 12 in the radial direction. However, the heights (IH _nf , IH _af ) of the inner ring 12 are not limited thereto, and various positions of the inner ring 12, for example, the upper surface of the inner ring 12 facing the first detection sensor 1320 and the inspection seat It may also mean the separation distance to the upper surface of (1100).

Since the inner ring 12 of the bearing B is fixed in this way, when the inner circumferential surface of the outer ring 11 is worn or damaged, when the outer ring 11 is pressed, the outer ring 11 moves and displacement occurs, but the inner ring 11 moves. (12) may not move.

Therefore, when the inner circumferential surface of the outer ring 11 is worn or damaged, the height (OH _nf ) of the outer ring 11 in a state in which the outer ring 11 is not pressurized and the pressing member 1310 hold the outer ring 11 A difference is generated between the heights OH _af of the outer ring 11 in the state of being pressurized. That is, the height (OH _af ) of the outer ring 11 in a pressurized state is higher than the height (OH _nf ) of the outer ring 11 in an unpressurized state. In addition, even when the outer circumferential surface of the ball 13 is worn or damaged, a difference between the height of the outer ring 11 in an unpressurized state (OH _nf ) and the height of the outer ring 11 in a pressurized state (OH _af ) may occur. there is. The height difference (OH _d ) or height change value of the outer ring 11 may be referred to as 'displacement' or 'displacement value (OH _d )'.

On the other hand, a difference occurs between the height of the outer ring 11 in an unpressurized state (OH _nf ) and the height of the outer ring 11 in a pressurized state (OH _af ), but the difference may be very small. This may be a case where, for example, at least one of the outer ring 11 and the ball 13 is damaged but to a very fine degree. As another example, the outer ring 11 and the ball 13 are not damaged, but it may be caused by a fine gap between the outer ring 11 and the ball 13.

Accordingly, when there is a difference between the height of the outer ring 11 in an unpressurized state (OH _nf ) and the height of the outer ring 11 in a pressurized state (OH _af ), the degree of the difference, that is, the bearing ( It can be determined whether B) is a good product that can be used any more, or whether it is in a normal state or a defective product that can no longer be used.

Again, returning to the first judgment unit 2000a, a method of determining whether the bearing B is defective will be described.

The height of the outer ring in an unpressurized state (OH _nf ) and the height of the outer ring in a pressurized state (OH _af ) detected by the first detection sensor 1320 are transmitted to the first determination unit 2000a. The first determination unit 2000a calculates a height difference (OH d ) between the height of the outer ring in an _{unpressurized} state (OH _nf ) and the height of the outer ring in a pressurized state (OH _af ) (see Equation 1).

[Formula 1]

Next, the first determination unit 2000a compares the calculated height difference OH _d with a preset reference height difference OH _s . At this time, when the calculated height difference OH _d is less than or equal to the standard height difference OH _s (refer to relational expression 1), the first judgment unit 2000a primarily determines that the bearing B is not defective. That is, the first judgment unit 2000a first determines that the bearing B can be used more or is in a normal state.

[Relationship 1]

However, when the calculated height difference (OH _d ) exceeds the reference height difference (OH _s ) (refer to relational expression 2), the first judgment portion (2000a) is damaged in the bearing (B). It is judged to the degree that it can no longer be used, that is, it is defective. That is, the first judgment unit 2000a first determines that the bearing B is in a defective state in which it can no longer be used.

[Relationship 2]

As described above, in the first inspection, after pressing the outer ring 11 while the inner ring 12 is fixed, it is determined whether or not the bearing B is defective by using the displacement of the outer ring 11. And, as described above, the difference in the height of the outer ring between the unpressurized state and the pressurized state may be due to damage to at least one of the outer ring 11 and the ball 13. Therefore, if it is determined that the bearing B is defective in the first inspection, it may be determined that at least one of the outer ring 11 and the ball 13 is defective. And if it is judged to be defective, since the bearing (B) can no longer be used, a subsequent inspection, that is, a secondary inspection is not performed. That is, since the bearing B was determined to be defective in the first inspection, there is no need to perform a second inspection. Therefore, the bearing inspection time can be shortened.

Meanwhile, in the first inspection, it is possible to inspect whether the outer ring 11 and the ball 13 are defective, but the inner ring 12 cannot be inspected. Therefore, since it is not known whether or not the inner ring 12 is defective even if it is determined to be normal in the first inspection, a second inspection is additionally performed when it is determined to be normal in the first inspection. At this time, in the secondary inspection, components other than the outer ring 11, that is, each of the ball 13 and the inner ring 12 are inspected for defects.

The first test result from the first determination unit 2000a is transmitted to the control unit 8000. In addition, the control unit 8000 controls the pickup unit 6000 and the guide unit so that the bearing B is moved to or not moved to the second delivery unit 5000 according to the primary determination result of the first determination unit 2000a. 7000) to control the operation. That is, when the first judgment unit 2000a determines that the bearing B is normal rather than defective as a result of the first inspection, a second inspection is performed using the second detector 1400 . Accordingly, the control unit 8000 controls the operation of the pickup unit 6000 and the guide unit 7000 so that the bearing B is seated on the inspection seat 1100 without moving. Conversely, if the first judgment unit 2000a determines that the bearing B is defective as a result of the first inspection, the subsequent inspection, that is, the second inspection is not performed. Accordingly, the control unit 8000 controls the operations of the pickup unit 6000 and the guide unit 7000 so that the bearing B is seated on the second carrying unit 5000 .

10 is an example of detection characteristic frequencies of an inner ring and a ball acquired by a converting unit of a second judgment unit according to an embodiment of the present invention.

The second detector 1400 is a means used for secondary inspection of the bearing (B). As shown in FIGS. 7 and 8 , the second detector 1400 is a rotator connected to the holder 1200b at the rear of the second fixture 1200b so as to rotate the second holder 1200b. 1410 and a second detection sensor located on the upper side of the bearing B located between the first fixture 1200a and the second fixture 1200b to detect vibration generated from the rotating bearing B. (1420).

The rotator 1410 may include a driving body 1411 providing rotational driving force and a rotating body 1412 installed to connect between the connecting member 1220b of the second fixture 1200b and the driving body 1411. . Here, the actuator 1411 may be a means including, for example, a motor. Also, the rotating body 1412 is rotated by the operation of the driving body 1411, and thus the second fixture 1200b connected to the rotating body 1412 rotates. Due to this, the inner ring 12 of the bearing B into which the insertion member 1210b of the second stator 1200b is inserted can rotate.

As shown in FIGS. 7 and 8 , the rotator 1410 may be fixedly mounted on the upper surface of the base part 9100, that is, the upper surface of the upper member 9110. And the connecting member 1220b of the second fixture 1200b is connected to the rotating body 1412 of the rotating machine 1410. Accordingly, the second fixture 1200b may be installed such that its height is fixed by the rotator 1410 .

The second detection sensor 1420 is disposed to be positioned above the bearing B fixed and supported by the contact member 1210a and the insertion member 1210b. That is, the second detection sensor 1420 is supported by the holder 1500 so as to be positioned above the bearing B fixed by the contact member 1210a and the insertion member 1210b. Further, the second detection sensor 1420 senses or detects vibration generated in the bearing B when the inner ring 12 of the bearing B is rotated by the operation of the rotating machine 1410 . More specifically, the second detection sensor 1420 is lowered to contact the outer race of the bearing to detect vibration, and transmits the detected vibration information to the second determination unit 2000b.

The second determination unit 2000b determines whether the bearing B is defective by using the vibration detected by the second detector 1400 . A configuration of the second judgment unit 2000b and a method of determining whether the bearing B is defective in the second judgment unit 2000b may be the same as those of Korean Patent Registration No. 10-1485680.

That is, the second determination unit 2000b receives the vibration information detected as an analog signal by the second detection sensor 1420 and converts the frequency of the digital signal (hereinafter, the detection characteristic frequency), and the rotation machine driving. In other words, the second processing unit 2200b obtains a reference characteristic frequency (hereinafter referred to as reference characteristic frequency) using the number of rotations of the motor and compares the detected characteristic frequency with the reference characteristic frequency to determine whether the bearing is defective. can include

The converter 2100b transfers the vibration information detected or detected as an electrical analog signal from the second detection sensor 1420 to the inner ring 12 and the ball 13 of the bearing B, excluding the outer ring 11, respectively. Converts to the detection characteristic frequency of That is, the vibration detected by the second detection sensor 1420 while rotating the inner ring 12 for a preset time is transmitted to the converting unit 2100b, and the converting unit 2100b uses this to vibrate for a preset time. Acquire information about (frequency). Then, by using this, it is converted into a frequency (detection characteristic frequency), which is the number of repetitions (oscillations) in a unit time, for example, 1 second. Thus, a frequency profile having amplitude and period data according to time can be obtained. Here, the amplitude may be determined according to the magnitude of the vibration, and the period may be determined according to the vibration occurrence interval. The converted detection characteristic frequency may be stored in the conversion unit 2100b.

The detected characteristic frequency of each of the inner ring 12 and the ball 13 of the converted bearing B may be as shown in FIG. 10 , for example.

The second processing unit 2200b receives the number of rotations of the drive body 1411, that is, the motor, and calculates the reference characteristic frequency for the inner ring 12 and the ball 13 of the normal bearing B for the number of rotations. At this time, the formula for calculating the reference characteristic frequency for the inner ring 12 and the ball 13 of the bearing B is as follows.

[Formula 2]

Inner race reference characteristic frequency (BPFI, Ball Pass Frequency Inner Race)

[Formula 3]

Ball reference characteristic frequency (BSF, Ball Spin Frequency)

(However, N _b = number of balls, B _d = ball diameter, P _d = bearing pitch diameter, θ = contact angle, RPM = revolutions per minute)

In addition, the second processing unit 2200b compares the detected characteristic frequency with the reference characteristic frequency to determine whether the bearing is defective. That is, the second processing unit 2200b compares the detection characteristic frequency for the inner ring 12 and the reference characteristic frequency, and compares the detection characteristic frequency for the ball 13 and the reference characteristic frequency. For example, the profile of the detection characteristic frequency acquired by the converter 2100b and the profile of the reference characteristic frequency may be compared. And, if there is a difference between the detection characteristic frequency and the reference characteristic frequency of the inner ring 12, the second processing unit 2200b determines that the inner ring 12 is no longer usable as a defect, and if not, it is a normal person who can use it further. judge it to be In addition, if there is a difference between the detection characteristic frequency and the reference characteristic frequency of the ball 13, the second processing unit 2200b determines that the ball is no longer usable as defective, and if not, determines that it is normal that it can be used further. do.

The second test result from the second determination unit 2000b is transmitted to the control unit 8000. Further, the control unit 8000 controls the pickup unit 6000 so that the bearing B is moved to the first delivery unit 4000 or the second delivery unit 5000 according to the second determination result of the second determination unit 2000b. ) and the operation of the guide unit 7000 is controlled. That is, when the second judgment unit 2000b determines that the bearing B is good rather than defective as a result of the second inspection, the control unit 8000 controls the pickup unit so that the bearing B is seated on the first delivery unit 4000. 6000 and the operation of the guide unit 7000 are controlled. However, when the second determination unit 2000b determines that the bearing B is defective as a result of the secondary inspection, the control unit 8000 operates the pickup unit 6000 so that the bearing B is seated on the second delivery unit 5000. and controls the operation of the guide unit 7000.

11 is a flowchart illustrating a method of inspecting a bearing using an inspection facility according to an embodiment of the present invention.

Hereinafter, with reference to FIGS. 2 to 11, a bearing inspection method using an inspection facility according to an embodiment of the present invention will be described.

First, the bearing B to be inspected is seated on the upper surface of the carry-in and seater 3100 by using the bearing carrier 9200 . At this time, the bearing (B) is seated so as to be positioned in front of the carry-in conveyor 3200 located at the other end of the carry-in seater 3100.

Then, the carry-in driver 3300 is operated to move the carry-in conveyor 3200 forward in the direction where the pick-up unit 6000 is located. Accordingly, the bearing B located in front of the carry-in conveyor 3200 moves while being pushed forward by the carry-in conveyor 3200. At this time, the conveyor 3200 is moved so that the bearing B can be positioned between the pair of pick-up members 6110 and 6120 as shown in FIG. 2 .

When the bearing B reaches between the pair of pickup members 6110 and 6120, the pickup actuator 6300 is operated to move the pair of pickup members 6110 and 6120 closer to each other. At this time, the pair of pickup members 6110 and 6120 are horizontally moved so that the inner surfaces of the pair of pickup members 6110 and 6120 come into contact with the outer ring 11 of the bearing B.

Next, the pair of pickup members 6110 and 6120 are lifted by using the elevator 6200 of the pickup unit 6000 to separate the bearing B from the loading and unloading unit 3100. In addition, the pick-up unit 6000 is moved to the upper side of the inspection seat 1100 located on the other side of the carry-in unit 3000 by using the guide unit 7000 . When the pick-up unit 6000 reaches the upper side of the test seat 1100, the pair of pick-up members 6110 and 6120 are lowered using the elevator 6200 to move the bearing B onto the test seat 1100. settle in Accordingly, the bearing B is positioned between the first fixture 1200a and the second fixture 1200b as shown in FIG. 2 .

Then, the bearing B is supported or fixed using the first and second fixers 1200a and 1200b. To this end, the driving member 1220a of the first fixture 1200a is operated to move the contact member 1210a toward the second fixture 1200b. Accordingly, the contact member 1210a comes into contact with the front surface of the bearing B, and then the bearing 1210a moves toward the second stopper 1200b, causing the bearing B to move toward the second stopper 1200b. ) is pushed towards At this time, the bearing (B) is moved using the first fixture (1200a) until the insertion member (1210b) of the second fixture (1200b) is inserted into the central opening of the inner ring (12) of the bearing (B). Accordingly, the bearing B is supported and fixed by the contact member 1210a and the insertion member 1210b as shown in FIGS. 7 and 8 .

Next, a primary inspection of the bearing B is performed (S100) (see FIG. 11).

To this end, first, the height of the first detection sensor 1320 located above the bearing (B) is adjusted. This can be adjusted by adjusting the operation of the elevating member 1510 provided on the holder 1500 to reach a preset sensor reference height. Then, the height (OH _nf ) of the outer ring in an unpressurized state is detected using the first detection sensor 1320 (S110) (see (a) of FIG. 9).

Next, the pressing member 1310 is raised by operating the elevating member 1330 of the first detector 1300 (S120). At this time, as shown in (b) of FIG. 9 , the pressure measuring member 1340 mounted on one end of the pressing member 1310 is raised so that the pressure measuring member 1340 can come into contact with the outer ring 11 of the bearing B. In addition, the operation of the elevating member 1330 is controlled so that the pressure measured by the pressure measuring member 1340 becomes a preset reference pressure.

When the pressure measured by the pressure measuring member 1340 becomes the reference pressure, the height OH _af of the outer ring is detected using the first detection sensor 1320 (S130) (see (b) of FIG. 9). That is, the height (OH _af ) of the outer ring in a pressurized state is detected. The height of the outer ring in an unpressurized state (OH _nf ) and the height of the outer ring in a pressurized state (OH _af ) detected by the first detection sensor 1320 are transmitted to the calculation unit 2100a of the first determination unit 2000a. .

The calculation unit 2100a calculates a height difference (OH _d ) between the height of the outer ring in an unpressurized _state (OH nf ) and the height of the outer ring in a pressurized state (OH _af ) (S140). Then, the first processing unit 2200a compares the calculated height difference OH _d with the preset reference height difference OH _s (S150) to determine whether the bearing B is defective (S161 and S162).

For example, when the calculated height difference OH _d exceeds the reference height difference OH _s (No), the first processing unit 2200a determines that the bearing B is defective (S162). That is, the primary inspection result for the bearing (B) is defective.

The determination signal from the first determination unit 2000a is transmitted to the controller 8000. Then, the control unit 8000 controls the first fixture 1200a, the horizontal mover 1200c, and the pick-up unit so that the bearing B seated on the inspection seat 1100 can be transported to the second delivery unit 5000. 6000), and controls the operation of the guide unit 7000. That is, the control unit 8000 operates the first fixture 1200a so that the contact member 1210a is separated from the bearing B. Then, the control unit 8000 operates the horizontal mover 1200c so that the bearing is pushed toward the first fixture 1200a. Accordingly, the insertion member 1210b of the second stator 1200b is taken out of the inner ring 12 of the bearing B, and the bearing B is separated from the first and second stators 1200a and 1200b. Thereafter, the control unit 8000 controls the pickup unit 6000 to pick up the bearing B placed on the inspection seat 1100 and place it on the second delivery unit 5000 . Accordingly, the bearing B determined to be defective in the first inspection is seated on the second delivery unit 5000 . That is, the bearing (B) determined to be defective in the first inspection result is immediately moved to the second delivery unit 5000 without performing the second inspection (S320).

As another example, when the calculated height difference (OH _d ) is less than or equal to the reference height difference (OH _s ) (Yes), the first processing unit 2200a of the first judgment unit 2000a determines that the bearing B is normal or good It is judged (S161). That is, the primary inspection result for the bearing (B) is normal. This determination signal is transmitted to the control unit 8000. Then, the controller 8000 operates the second detector 1400 and the second determination unit 2000b so that the second inspection can be performed.

For the second inspection (S200), first, the pressing member 1310 pressing the bearing (B) is lowered (S210). Then, the rotating machine 1410 is operated to rotate the inner ring 12 (S220).

Then, the height of the second detection sensor 1420 is adjusted so that it can come into contact with the outer ring 11 of the bearing (B). More specifically, the lifting member 1510 of the holding device 1500 is operated to lower the holding member 1520. At this time, the proximity sensor 1530 installed under the mounting member 1520 lowers the mounting member 1520 until a signal is generated in contact with the outer ring 11 . Accordingly, the second detection sensor 1420 is in contact with the outer ring of the bearing (B).

Next, vibration of the bearing B is sensed or detected using the second detection sensor 1420 and sent to the conversion unit 2100b of the second determination unit 2000b. Accordingly, detection characteristic frequencies for each of the inner ring 12 and the ball 13 of the bearing B are obtained (S230).

In addition, the second processing unit 2200b of the second determination unit 2000b receives the number of rotations of the drive body 1411 of the rotating machine 1410, that is, the motor, and receives the number of rotations of the inner ring 12 of the normal bearing B ) and the reference characteristic frequency for the ball 13 is calculated and stored. Subsequently, the second processing unit 2200b of the second determination unit 2000b compares the detected characteristic frequency with the reference characteristic frequency (S240) to determine whether the bearing is defective. That is, it is determined whether the inner ring and the ball are defective.

At this time, for example, when the detection characteristic frequency of each of the inner ring 12 and the ball 13 is the same as the reference characteristic frequency (Yes), the second processing unit 2200b determines that the bearing B is normal (S251). That is, the secondary inspection result or the final inspection result for the bearing becomes normal. The determination signal from the second determination unit 2000b is transmitted to the controller 8000.

Accordingly, the control unit 8000 controls the first fixture 1200a and the horizontal mover 1200c so that the bearing B seated on the inspection seat 1100 can be transported to the first delivery unit 4000 (S310). , Controls the operations of the pickup unit 6000 and the guide unit 7000.

As another example, if at least one of the inner ring 12 and the ball 13 has a different detection characteristic frequency and a reference characteristic frequency (No), the second processing unit 2200b determines that the bearing B is defective (S252) . That is, the secondary inspection result or the final inspection result for bearing B is defective. The determination signal from the second determination unit 2000b is transmitted to the controller 8000. Accordingly, the controller controls the first fixture 1200a, the horizontal mover 1200c, and the pick-up unit so that the bearing B seated on the inspection seat 1100 can be transported to the second delivery unit 5000 (S320). (6000), controls the operation of the guide unit (7000).

The bearings B inspected in this way and transported to the first and second delivery units 4000 and 5000 are transported out of the inspection facility.

In this way, in the embodiment, the bearing (B) is first inspected by a simple method of pressurizing the bearing (B) and detecting a change in height of the outer ring (11). And, if it is determined that the bearing B is defective in the first inspection, the step of performing the second inspection of the bearing B by using the frequency characteristic due to the vibration of the bearing B is not performed. In other words, if it is determined that the bearing B is defective in the first inspection, the second inspection, which is more complicated and takes a long time than the first inspection, is omitted, and it is finally determined that the bearing B is defective. Accordingly, the time required for inspecting the bearing B can be shortened.

In addition, when the bearing B is determined to be normal in the first inspection, the bearing B can be inspected more accurately by additionally performing the second inspection.

1000: detection unit 1100: inspection seater
1200a: first fixture 1210a: adhesion member
1200b: second fixture 1210b: insertion member
1300: first detector 1310: pressing member
1320: first detection sensor 1340: pressure measuring member
1400: second detector 1410: rotator
1420: second detection sensor

Claims (19)

An inspection seat arranged so that the bearing to be inspected can be seated on the upper surface;
a first detector installed to detect a displacement value of a bearing positioned between the test seat and the test seat;
a first judgment unit that firstly determines whether or not the bearing is defective by using the displacement value detected by the first detector and a preset reference displacement value;
a second detector disposed to face the test seat and selectively operating according to a result of the determination in the first judgment unit so as to detect vibration generated in a bearing located between the test seat and the test seat; and
and a second determination unit that secondarily determines whether or not the bearing is defective by using the vibration detected by the second detector. The method of claim 1,
The first detector,
a pressing member disposed facing the test seater to move toward the bearing seated on the test seater and pressurize the bearing or to move toward the opposite side of the bearing;
a first detection sensor disposed to face the pressing member so as to detect a displacement value of a bearing seated on the inspection seat; and
and a pressure measuring member mounted on the pressing member to measure the pressure applied by the pressing member to the bearing. The method of claim 2,
A control unit for controlling the operation of the first and second detectors and the first and second determination units;
The control unit operates the second detector and the second determination unit when the first determination unit determines that the bearing is normal, and operates the second detector and the second determination unit when the first determination unit determines that the bearing is defective. An inspection device that controls the operation of the judgment unit. The method of claim 3,
The second detector includes a second detection sensor disposed facing the test seat to detect vibration and selectively operated by the control unit according to a result of the determination in the first determination unit,
It includes a holder installed on the upper side of the inspection seat so that the first and second detection sensors can be mounted and ascended and descended,
The inspection device mounted on the holder so that the height of the lower surface of the first detection sensor is higher than that of the lower surface of the second detection sensor. The method of claim 1,
The upper surface of the test seat includes an inclined surface whose height decreases from both outer sides in the width direction toward the center. The method of claim 1,
An inspection device including an elevator connected to the inspection seating unit to lift and lower the inspection seating unit. The method according to any one of claims 1 to 6,
A first fixture installed in front of the test seater to horizontally move to apply force to the bearing from the front side of the bearing seated on the upper surface of the test seater;
a second fixture installed at the rear of the inspection seat to be inserted into the inner ring of the bearing moving backward by the operation of the first fixture to fix the vertical height of the inner ring of the bearing; and
Inspection apparatus comprising a; horizontal mover installed at the rear of the inspection seat so that the second fixture can move horizontally to apply force to the bearing from the rear of the inserted bearing. an inspection device according to claim 7;
a carry-in unit disposed on one side of the inspection seat in a direction crossing the direction in which the first and second fixtures are disposed so that the bearing to be inspected can be seated on the upper surface;
a first carry-out unit disposed on the other side of the inspection seat so that the bearings determined to be normal in both the first and second judgment units can be seated on the upper surface;
a second carry-out unit disposed on the other side of the first carry-out unit so that the bearings determined to be defective by the first judgment unit and the bearings judged to be defective by the second judgment unit may be seated on an upper surface; and
Inspection equipment including a; pick-up unit capable of moving horizontally in the direction in which the carrying-in part, the test seater, the first carrying-out part, and the second carrying-out part are arranged by supporting bearings, and being able to move up and down. The method of claim 8,
Each of the carry-in unit, the first and second carry-out units,
A seater extending in a direction in which the first and second fixtures are arranged so that the bearing can be seated on the upper surface; and
Inspection equipment including a conveyor fastened to the seater to support the bearing seated on the seater and to slide along the seater. The method of claim 8,
the pick-up unit,
a pickup having a pair of pickup members arranged in a diametrical direction of the bearing so that the bearing can be positioned therebetween; and
Inspection equipment comprising a; pickup driver connected to the pickup to move the pair of pickup members closer to or farther from each other according to the diameter of the bearing to be inspected. A first inspection process of pressurizing the bearing from the lower side of the bearing and detecting a change in height of the bearing after pressurizing to determine whether the bearing is defective; and
A second inspection process, which is selectively performed according to a result of the determination in the first inspection process, and inspects the bearing in a different way from the first inspection process. The method of claim 11,
The process of pressurizing the bearing includes a process of pressurizing the outer ring of the bearing,
The primary inspection process includes a process of fixing so that the vertical height of at least a part of the bearing structure other than the outer ring can be fixed before the process of pressurizing the outer ring. The method of claim 12,
In the first inspection process,
The process of detecting the first height (OH _nf ) of the outer ring of the bearing;
Pressing the outer ring of the bearing by applying force in an upward direction to the outer ring of the bearing;
Detecting the second height (OH _af ) of the pressurized outer ring;
Calculating a height difference (OH _d ) between the first height (OH _nf ) and the second height (OH _af );
When the calculated height difference (OH _d ) is less than or equal to a preset reference height difference (OH _s ), determining that the bearing is normal; and
and determining that the bearing is defective when the calculated height difference (OH _d ) exceeds the reference height difference (OH _s ). The method of claim 12,
The fixing process is
A test method comprising: fixing the inner ring of the bearing so that the vertical height of the inner ring of the bearing can be fixed. The method of claim 13,
The process of pressurizing the outer ring,
Measuring the pressure applied to the outer ring; and
Including; the process of adjusting the measured pressure to be a preset reference pressure,
When the measured pressure becomes a preset reference pressure, a process of detecting the second height (OH _af ) is performed. The method of claim 13,
Inspection method of performing the second inspection process when the bearing is determined to be normal in the first inspection process. The method of claim 16
In the second inspection process,
The process of rotating the inner ring of the bearing; and
An inspection method comprising: detecting vibration from a rotating bearing and using the detected vibration to determine whether or not the bearing is defective. The method according to any one of claims 11 to 17,
and determining that the bearing is normal when the bearing is determined to be normal in the secondary inspection process, and moving the bearing after the secondary inspection to a first transport position. The method of claim 18
when the bearing is determined to be defective in the first inspection, finally determining that the bearing is defective, and moving the bearing for which the first inspection has been completed to a second carrying position different from the first carrying out position; and
and a step of finally determining that the bearing is defective when the bearing is determined to be defective in the secondary inspection, and moving the bearing for which the secondary inspection is completed to the second transport position.

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