KR100548631B1 - Inner Diameter Inspection Device for Moving Hollow Shape - Google Patents

Abstract

     In the present invention, in order to maintain and repair a backup roll bearing supporting a work roll in a hot rolling operation of a steel mill, the bearing interior is mapped to the inside of the bearing, and when the inner diameter is inspected, the straightness of the bearing is conveniently, safely and precisely. And it relates to a mobile hollow bearing bearing bore inspection apparatus that can measure the roundness, mounted on the top of the bearing 20, using the PDA controller 70 to move the up and down 100 up and down and the rotating part 200 Rotation around the axis using) to measure the profile according to the wear of the bearing 20 can be diagnosed the exact wear degree.

Backing roll, bearing, measurement

Description

Device for detecting inner diameter of bearing

     1 is a view showing a general bearing maintenance work

     Figure 2 is a photograph showing the load distribution and wear of the bearing

     3 is a view showing a conventional bearing inner diameter inspection apparatus;

     4 is a view showing the working configuration of the bearing bore inspection apparatus of the present invention.

     Fig. 5 shows a bearing inner diameter inspection device of the present invention.

     6A is a cross-sectional view showing an up-down portion of the present invention, and FIG. 6B is an exploded view.

     Fig. 7A is a sectional view showing a rotating part of the present invention, and Fig. 7B is an exploded view.

     Fig. 8A is a view showing a measuring unit of the present invention, and Fig. 8B is an exploded view.

     9 is a diagram showing a measurement system setting mode of the present invention.

     10A and 10B show the measuring position of the present invention.

     11 is a graph showing the measurement results of the present invention.

     12 is a flow chart showing the operational sequence of the present invention.

     <Description of the symbols for the main parts of the drawings>

       10: micrometer 20: bearing

       30: support 100: up-down part

       104: body top 110: timing pulley

       112: motor mount 116: stepping motor

       126: ball screw nut 128: ball screw nut housing

       130: ball screw 140: ball spline shaft

       200: rotating part 202: flange

       204: ball spline bush 210: sleeve

       212 housing 214: contact ball bearing

       220: rotating plate 224: motor bracket

       300: probe portion 302: center block

       306a, b: level block 308a, b: guide block

       310: center plate 312a, b: setter

       314a, b: guide bar 316a, b: probe

    The present invention relates to a large bearing inner diameter inspection apparatus of the internal hollow type, and more particularly, after the separation from the roll to maintain the backup roll bearing supporting the work roll in the hot rolling work of the steel mill When inspecting the inner diameter, it provides a device that can measure and manage the straightness and roundness of bearings conveniently, safely and precisely to prevent backup roll bearing accidents in advance and further reduce rolling productivity downtime and improve rolling quality. A moving hollow shape bearing inner diameter inspection apparatus for improving.

    1 shows a general bearing maintenance work, in which the bearing 20 is placed on the support 30 and the operator is measuring the flatness with the micrometer 10.

    In general, the oil bearing (20) widely used in the backup roll chocks of the four-stage roll for rolling hot rolled steel sheet has a roll neck shell bearing supporting the rotating journal of the backup roll. Bearings such as a babbit alloy (Sn base) or an aluminum alloy having a thickness of about 4 mm are used.

    Since the oil film bearing has a constant thickness between the journal and the journal and the bearing are completely separated in the steady state operation, the friction coefficient is about 0.001 to 0.003, and the oil film bearing having such characteristics uses lubricant. It is unavoidable that carbides in the oil deposit on the hydraulic parts of the bearings (the inner surfaces of the shell bearings), and these deposits form a non-uniform film layer, which will cause metal friction, which will cause the carbides at high temperatures to be lowered into chokes. It can also cause bearing accidents that cause metal to collapse.

    The maintenance and repair of backup rolls is based on 1.5 million tons of production, which removes the carbon generated in the shell bearing and choke inner diameter.

    Figure 2 is a photograph showing the bearing wear, such carbides (50, 55) is not locally caught in the entire inner diameter portion, but occurs locally, and the shape is also varied. Therefore, carbide removal involves disassembling all parts during maintenance of the backup roll, and then replacing carbides stuck in the shell bearing and choke inner diameter with sandpaper. It is done by the method. The carbide removed portion is generated as shown in Figure 2 due to the local wear and deepening every time the maintenance is shortened the life of the bearing as well as the risk of bearing accident during rolling.

    Therefore, after removing the carbide completely, the axially generated by using an inside micrometer by hand is used to determine how much the locally produced wear portion affects the flatness (straightness) of the bearing surface. It is measured by designating the direction of middle, low, and circumferential direction, but it is difficult to grasp the precise straightness such as deviation of the measuring part and excessive measurement time, too much measurement time, and it is difficult to make the local wear part smoothly. Therefore, there is a problem such as a maintenance failure is predicted to some extent.

    As a general method, as shown in FIG. 1, a worker directly enters a bearing to measure a bearing and recognizes a wear level according to the measured value. The measured value varies depending on the operator, and an accurate measuring device is required. Do.

    Figure 3 shows a conventional bearing inner diameter inspection apparatus, a large bushing-type bearing inner diameter measuring device filed in Patent Application No. 2001-41696 as a method for solving the above problems is the drive unit 400, column 300 ), Which consists of a dial gauge measuring unit 100, manufactured according to the standard of the bushing-type bearing (1) and installed on the main base 15 to rotate and the main base of the driving unit 400 ( 15 is located on the upper right side of the column 12 and the column (300) having a cylinder (9a) to operate back and forth, and fixed to the cylinder (9) and the guide rod (10) of the column (300) bushing type The measurer 100 having the sensor 200 for measuring the inner diameter of the bearing 1 is configured to measure the inner diameter of the bearing.

    In addition, the drive unit 400 for rotating and measuring the bearing is not centered by the vibration during rotation, poor center control due to a large measurement error occurs, it is difficult to precisely manage the bearing, poor roundness due to wear of the bearing, etc. When rolling work in the state, there is a problem that the thickness of the plate is not constant, so it is necessary to check the roundness and to repair the chokes and bearings in which the abnormality occurs.There is no device that can check the roundness, There were a number of problems such as not measuring precisely according to measurement error and skill level by checking the roundness by measuring several points using a micrometer or the like while turning in the direction.

     An object of the present invention is to solve the above problems, to take out the rolling bearings from the choke to mount the measuring body to the upper part of the bearing in order to measure the wear of the bearing to enable the movement of the up and down using the controller The purpose of the present invention is to provide a movable hollow-shaped bearing inner diameter inspection device that can prevent the occurrence of facility accidents, work avoidance, and safety accidents by measuring the profile according to the wear level of the bearing by rotating about the axis by using the rotating part.

     The movable hollow-shaped bearing inner diameter inspection apparatus of the present invention comprises an up-down part that is responsible for the up and down movement of a bearing measuring device, a rotation assembly that rotates the measuring part left and right, and a measuring part that measures and detects a bearing profile.

     The present invention will be described in detail with reference to the accompanying drawings.

     Figure 4 shows the working configuration of the bearing bore inspection apparatus of the present invention, Figure 5 shows the bearing bore inspection apparatus of the present invention.

     The bearing bore inspection apparatus of the present invention is located above the bearing 20, and the data obtained by the apparatus of the present invention is transmitted to the PDA terminal 70, and stored in the personal computer 75 to analyze the data. The configuration is shown.

     Referring to FIG. 5, the up-down portion 100 to which the stepping motor 116 is attached and having the body pipe 150 is supported by the triangular leg portion 80, and a rotating portion (below) of the up-down portion 100 is provided. 200 is positioned, and the measuring unit 300 is positioned below the rotating unit 200.

     The up-down portion of the present invention is shown in cross section in Fig. 6A and in exploded view in Fig. 6B.

     Referring to FIG. 6B, a ball screw 130 having a screw is installed in the up-down part 100 and installed in the body pipe 150, and a round shape having a screw formed therein to move up and down on the upper part of the ball screw 130. Ball screw nut housing 128 is secured by ball screw nut 126.

     At the top of the ball screw nut housing 128 a housing 124 with a round cylindrical center hole is inserted, in turn a circular ball bearing 122 is inserted first, and the round spacer 118 is fastened in turn and somewhat A round flange 113 with two holes is inserted.

     On the flange 113, a motor mount 112 having a square hole 101 and a round hole 103 formed therein is installed, and a timing pulley having a round end recessed in the hole 103 ( 110 is inserted, and a round cylindrical body top 104 is installed thereon. The top of the body top 104 is attached with a hanger 102 is a five-point round groove.

     A square motor plate 108 and a small timing pulley 106 are inserted in the upper portion of the hole 101 of the motor mount 112, and the timing pulley 106 is driven by a stepping motor 116 which performs a precise action. The timing pulley 106 is connected to the timing pulley 110 by a belt (not shown).

     Referring to FIG. 6A, a ball spline shaft 140 of a round circular pipe shape is securely fastened to the ball screw nut housing 128 on the outside of the ball screw 130 and a body pipe (outside) of the ball spline shaft 140. 150 is located.

     Fig. 7A shows the rotating part of the invention in cross section and Fig. 7B shows an exploded view.

     Referring to FIG. 7A, the ball bearings 206 and 208 are inserted into the rotary part 200 at the upper portion of the sleeve 210 with the lower jaw, and the ball spline bush 204 is fixed. A housing 212 is installed outside the sleeve 210, and a flange 202 processed in a round shape is fastened to an upper portion of the housing 212. Two contact ball bearings 214 are inserted between the lower portion of the sleeve 210 and the lower portion of the housing 212, and the ball spline bush 216 is fastened inside the lower portion of the sleeve 210.

     The round plate 223 is machined at the center of the square iron plate and the rotary plate 220 having the square hole 221 at one end thereof is fixed to the lower portion of the housing 212 at the center hole, and has a round flange 228. Is fixed by.

     A flange 232 is fixed to the lower part of the sleeve 210, a gear 234 having a round circular angle is fixed to the lower part of the flange 232, and a gear washer 236 is fixed to the lower part of the gear 234. .

    A stepping motor 222 for correct rotation is inserted into the square hole 221 of the rotating plate 220, and is fastened by the motor bracket 226, and the gear 230 is fixed to the stepping motor 222, and the gear 234 is fixed. ) And power transmission is achieved.

      Fig. 8A shows the measuring section of the present invention, and Fig. 8B shows an exploded view.

   In the measuring unit 300, a square center block 302 is connected to the washer 236 shown in FIG. 7B, and small square level blocks 306a and 306b are attached to both ends of the center block 302. In the upper portion of the level blocks 306a and 306b, lever bolts 304a and 304b in the shape of “a” are provided with respective guide blocks 308a and 308b.

   The center plate 310 is fixed to the lower portion of the center block 302, and guide bars 314a and 314b formed by two long pipe-shaped rods are formed in the center plate 310 along the hole of the center plate 310. It is installed to move, both ends of the guide bar (314a, 314b) is guided by the guide block (308a, 308b).

     Both ends of the guide bars 314a and 314b are coupled with the “T” shaped setters 312a and 312b, and the centers of the setters 312a and 312b include probe bars 320a and 320b inserted into the holes. Extending at the end of each of the probe bars 320a and 320b, the clamps 318a and 318b having a rectangular shape with “a” shaped probe caps 322a and 322b installed thereto are fixed thereto.

     Probes 316a and 316b are externally installed in the clamps 318a and 318b.

     The operation of the bearing bore inspection apparatus of the present invention configured as described above will be described.

     First, when the stepping motor 116 of the up-down part 100 according to the present invention shown in FIG. 6A is driven, the timing pulley 110 is provided through a timing pulley 106 and a timing belt (not shown) installed in the motor 116. Rotation force is transmitted to the) and receives the rotational force from the timing pulley 110, the ball screw 130 also rotates. The ball screw nut 126 operates by the rotation of the ball screw 130 to move up and down with the screw nut housing 128.

      At this time, the ball spline shaft 140 assists the rotation of the ball screw 130 and firmly supports the ball screw nut 126 and the ball screw nut housing 128, and the body pipe 150 is a ball screw Act to protect and support (130).

      In the rotating part 200 shown in FIG. 7B, when the stepping motor 222 is acted on, the stepping motor 222 is applied to the small gear 230 under the motor plate 220, and the power is transmitted to the gear 234 again. Rotation takes place.

      In the measuring unit 300 illustrated in FIG. 8B, the center plate 310 positioned below the center block 302 supports the guide bars 314a and 314b and is installed on the setters 312a and 312b. , 320b) adjusts the lengths of the probes 316a and 316b for measuring the bearing profile according to the measurement position.

      9 shows a measurement system setting mode of the present invention.

      The setting mode selects manual, setting, roundness and straightness.

      10A and 10B show the measuring position of the present invention.

      Conventional measurement positions were measured by forming three to four points 450, 452, and 454 as shown in FIG. 10A by forming an angle.

      However, in the present invention, the measurement device designated by selecting the measurement object using the setting mode and the angle of the start position and the end position is designated as shown in Fig. 10B, R1, S1 (460), R2, S2 (462), Specifies to measure the profile while rotating R3, S2 (464).

      11 shows the measurement results of the present invention graphically.

      The data value measured by the above method is a graph showing the result data of straightness and roundness as shown in FIG.

      12 shows the operational sequence of the present invention as a flowchart.

      An embodiment of the operation of the bearing bore inspection apparatus of the present invention operated as described above will be described with reference to the flowchart of FIG. 12.

      First, when the inspection apparatus of the present invention starts work at the home position at the initial setting and the stepping motor 116 of the up-down part 100 is driven, the ball screw nut housing 128 moves to perform the operation of the up-down part. To complete.

      When the probes 316a and 316b of the measuring unit 300 are brought into contact with the point a 450 of the bearing, and if the contact is poor, the probes 316a and 316b are rotated again to measure the profile, and through the above method. The obtained data is transmitted to the PDA terminal 70 and stored in the personal personal computer 75 to analyze the data.

      When the ball screw nut housing 128 completes movement by acting on the stepping motor 116 of the up-down part 100, the point 460 of the probes 316a and 316b of the measuring part 300 is placed on the bearing. If the contact is made in poor contact, the contact is re-contacted to rotate the probes 316a and 316b to measure the profile, and transfer the data obtained through the above method to the PDA terminal 70 for storage in the personal computer 75. When the ball screw nut housing 128 is completed by moving the stepping motor 116 of the up-down part 100, the probes 316a and 316b of the measuring part 300 are placed on the bearing. In contact with the point 470, the probes 316a and 316b are rotated to measure the profile, and the data obtained through the above method is transferred to the PDA terminal 70 and stored in the personal computer 75 to store the data. When the stepping motor 222 of the rotating part 200 is stopped, And, the operation is ended when stopping the stepping motor 116 of the up-down member (100).

The movable hollow portion bearing inner diameter inspection apparatus of the present invention configured as described above is mounted on the upper portion of the bearing 20 to measure the straightness and roundness according to the wear rate of the backup roll bearing, and the up-down portion using the PDA controller 70. By moving up and down 100 and rotating about the axis using the rotating part 200 to measure the profile according to the wear of the bearing 20, it is possible to diagnose the accurate wear degree, the quality of the roll precision management and rolling through There is an excellent effect of contributing to cost reduction by improving delay, preventing accidents and extending service life.

Claims (3)

    Up and down part 100 that is responsible for the up and down movement of the bearing measuring device, and located in the lower part of the rotating part 200 and the rotating part 200 which is located at the lower part of the up and down part 100 and rotates the measuring part left and right, Is composed of a measuring unit 300 for measuring and detecting      A stepping motor 116 is attached to the up-down part 100, has a body pipe 150, supported by a triangular leg 80, and a ball screw 130 is installed in the body pipe 150. The ball screw nut housing 128 is fixed to the upper part of the screw 130 by the ball screw nut 126, and the housing 124 is inserted into the upper part of the ball screw nut housing 128, and in turn, the ball bearing 122 and The spacer 118 and the flange 113 are inserted, and the motor mount 112 in which the square hole 101 and the round hole 103 are machined is installed on the flange 113, and the timing is provided in the hole 103. The pulley 110 is inserted, the body top 104 is installed thereon, the hanger 102 is attached to the top of the body top 104 and the motor plate 108 on the top of the hole 101 of the motor mount 112 And the timing pulley 106 is inserted and the timing pulley 106 is driven by the stepping motor 116 and the timing pulley 106 is connected to the timing pulley 110 by a belt, and outside the ball screw 130, the ball spline shaft 140 is firmly fastened to the ball screw nut housing 128 and the ball spline shaft 140 A movable hollow shape bearing inner diameter inspection device configured to be positioned outside the body pipe 150. The method of claim 1,      Ball bearings 206 and 208 are inserted into the rotating part 200, the ball spline bush 204 is fixed, and a housing 212 is installed outside the sleeve 210 and the housing 212 is inserted into the rotating part 200. ), A flange 202 is fastened, a contact ball bearing 214 is inserted between a lower portion of the sleeve 210 and a lower portion of the housing 212, and a ball spline bush 216 inside the lower end of the sleeve 210. Is fastened and a round hole 223 is processed at the center and a square plate 221 at one end of the rotating plate 220 is fixed to the lower part of the housing 212 at the center hole, and has a round flange 228. Is fixed by a flange 232 to the lower portion of the sleeve 210, the gear 234 is fixed to the lower portion of the flange 232, the gear washer 236 is fixed to the lower portion of the gear 234, the rotating plate Stepping motor 222 is inserted into the square hole 221 of 220 by the motor bracket 226 The fastening and stepping motor 222, the gear 230 is fixed and the movable hollow-shape bearing inner diameter inspection device which is engaged with the gear 234, the power transmission is made. The method of claim 1, A center block 302 is connected to the washer 236 in the measuring unit 300, and level blocks 306a and 306b are attached to both ends of the center block 302 and above the level blocks 306a and 306b. The lever bolts 304a and 304b install the respective guide blocks 308a and 308b, the center plate 310 is fixed to the lower part of the center block 302, and the guide bars 314a and 314b laterally to the center plate 310. ) Is installed to move along the hole of the center plate 310, both ends of the guide bar (314a, 314b) is guided by the guide block (308a, 308b) and the setter (both ends of the guide bar (314a, 314b) 312a and 312b are coupled, and probe bars 320a and 320b extend outwards at the center of each setter 312a and 312b, and probe caps 322a and 322b at the ends of each probe bar 320a and 320b. ) Clamps 318a and 318b are fixed, and each of the clamps 318a and 318b is externally provided with probes 316a and 316b. Mobile hollow-shaped bearing inner diameter testing device.

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