Automatic bearing ring flaw detector based on forked coil

Abstract

The invention is suitable for the technical field of metal flaw detection devices, and provides an automatic bearing ring flaw detection machine based on a fork-shaped coil, which comprises an equipment rack, and the equipment rack is provided with a first fork-shaped magnetization unit, a second fork-shaped magnetization unit and a bearing ring mounting unit, the bearing ring mounting unit is used for mounting a to-be-detected bearing ring workpiece and can also drive the bearing ring workpiece to rotate so as to facilitate flaw detection observation and magnetic suspension spraying, and a circumferential magnetization current path is formed by a plurality of first conductive forks and a plurality of second fork strips; a longitudinal magnetization current path is formed by the two ends of the first annular electrified coil and the second annular electrified coil, the overall flaw detection effect is improved in a two-way composite magnetization mode, and when flaw detection is conducted on the bearing ring workpiece, the annular structure of the bearing ring workpiece can be inserted between the two side edges of the first conductive fork of the U-shaped structure, so that the flaw detection efficiency is improved. Therefore, the circumferential magnetic field received by the inner side wall and the outer side wall of the bearing ring workpiece is more uniform.

Description

Technical Field

[0001] The invention is applicable to the technical field of metal flaw detection devices and provides an automatic bearing ring flaw detector based on a fork-shaped coil. Background Art

[0002] As an important pressure-bearing component, bearings are subject to strict quality inspection before assembly and use. Among them, the detection of cracks or various minor defects by magnetic particle flaw detector is an important step in the quality inspection of bearing components. Magnetic particle flaw detection is a non-destructive testing method that detects defects on the surface or near the surface of ferromagnetic materials by the accumulation of magnetic particles in the leakage magnetic field near the defect. However, in the magnetic particle flaw detection of the bearing ring, one of the important components of the bearing, due to the annular structure of the bearing ring, the traditional magnetic particle flaw detector usually magnetizes the workpiece surface by the rod penetration method (i.e., inserting a current-carrying conductor into the annular hole of the bearing ring). However, the magnetic field distribution of this method is not uniform, and the magnetic field on the inner surface of the ring is stronger than that on the inner surface of the ring. The outer surface of the ring, which leads to inaccurate detection on the outer side of the ring. In this case, the magnetic field on the outer surface of the ring can only be forcibly increased by passing an energized conductor current. This method will not only cause energy waste, but also make the accuracy of magnetization more difficult to control. Especially when performing flaw detection on larger bearing rings, this shortcoming will be infinitely magnified. In particular, our customers currently need a bearing ring flaw detection equipment for wind turbine gear box bearings. The size of wind turbine gear box bearings is large, and the difference between the inner and outer diameters is also large. It is difficult to meet the customer's needs using traditional flaw detection equipment. At the same time, there is currently no flaw detection machine workpiece fixing device that can adapt to bearing rings of multiple sizes at the same time. Summary of the invention

[0003] To this end, the present invention provides an automated bearing ring flaw detector based on a fork-shaped coil, wherein a circumferential magnetization current path is formed by a first fork-shaped magnetization unit and a second fork-shaped magnetization unit, and a longitudinal magnetization current path is formed by two ends of a first annular energized coil and a second annular energized coil, and the overall flaw detection effect is improved by two-way composite magnetization. The first fork-shaped magnetization unit is provided with a first conductive fork of a "U"-shaped structure. When flaw detection of a bearing ring workpiece is performed, the annular structure of the bearing ring workpiece can be inserted between two side edges of the first conductive fork, so that the circumferential magnetic field received by the inner and outer side walls of the bearing ring workpiece will be more uniform, thereby avoiding the problem in the above-mentioned background technology that the magnetic field on the inner surface of the ring is stronger than that on the outer surface of the ring. At the same time, a bearing ring installation unit with a lifting function is used to install the bearing ring workpiece to be detected to adapt to bearing ring workpieces of different sizes.

[0004] In order to achieve the above object, the present invention provides the following technical solution: an automatic bearing ring flaw detector based on a fork-shaped coil, comprising:

[0005] Equipment racks for mounting the units;

[0006] A bearing ring installation unit, used for installing a bearing ring workpiece to be tested, the bearing ring installation unit comprising a lifting frame, the lifting frame is fixedly connected to a roller installation plate, and the roller installation plate is provided with at least one ring roller;

[0007] The first fork-shaped magnetizing unit and the second fork-shaped magnetizing unit are slidably arranged on the equipment frame, the first fork-shaped magnetizing unit includes a first fixed seat, the second fork-shaped magnetizing unit includes a second fixed seat, the equipment frame is provided with a first magnetizing unit driving device for driving the first fixed seat to move and a second magnetizing unit driving device for driving the second fixed seat to move, the first fixed seat and the second fixed seat can move towards each other or move away from each other under the drive of the first magnetizing unit driving device and the second magnetizing unit driving device, the first fixed seat is provided with a first annular energized coil and a plurality of first conductive forks arranged in an annular array, the first conductive fork is a "U"-shaped structure, the second fixed seat is provided with a second annular energized coil and a plurality of second conductive strips arranged in an annular array, in the process of the first fixed seat and the second fixed seat moving towards each other, the plurality of first conductive forks and the plurality of second conductive strips are connected end to end in sequence to form a complete circumferential magnetization current path.

[0008] Furthermore, the first fixing seat is provided with a flaw detection magnetic rod, and the flaw detection magnetic rod can be inserted into the center position of the hole of the bearing ring workpiece to be inspected.

[0009] Furthermore, the number of the ring rollers is two, and the two ring rollers are arranged on a roller mounting plate for parallel rotation. The roller mounting plate is also provided with a roller rotation driving device, and the roller rotation driving device is connected to the two ring rollers for driving. The roller rotation driving device is used to drive the two ring rollers to rotate synchronously in the same direction.

[0010] Furthermore, the equipment frame is provided with an installation unit moving rail and an installation unit driving device, the bearing ring installation unit includes a translation base, the lifting frame is fixedly connected to the translation base, the translation base is slidably connected to the installation unit moving rail, and the installation unit driving device is used to drive the translation base to reciprocate on the installation unit moving rail. The translation base can move from one side of the first fork-type magnetization unit and the second fork-type magnetization unit to between the first fork-type magnetization unit and the second fork-type magnetization unit through the installation unit moving rail and the installation unit driving device.

[0011] Furthermore, the translation base is fixedly provided with a ferrule anti-collision and anti-skew device, the ferrule anti-collision and anti-skew device is arranged below the ferrule roller, and the ferrule anti-collision and anti-skew device includes two groups of anti-collision and anti-skew rod groups arranged at intervals.

[0012] Furthermore, the equipment frame is provided with a liquid collecting tank, a toroidal coil transformer and a fork coil transformer, both ends of the first toroidal energized coil and both ends of the second toroidal energized coil are electrically connected to the toroidal coil transformer, and both ends of the circumferential magnetizing current path formed by connecting the first conductive forks and the second conductive strips are electrically connected to the fork coil transformer respectively.

[0013] Furthermore, the first fixing seat is fixedly provided with a first coil bottom plate, the first annular powered coil is fixedly provided on the first coil bottom plate, the first annular powered coil is fixedly provided with a first fork-shaped coil bottom plate on the side away from the first coil bottom plate, the first conductive fork is fixedly provided on the first fork-shaped coil bottom plate, the second fixing seat is fixedly provided with a second coil bottom plate, the second annular powered coil is fixedly provided on the second coil bottom plate, the second annular powered coil is fixedly provided with a second fork-shaped coil bottom plate on the side away from the second coil bottom plate, and the second conductive strip is fixedly provided on the second fork-shaped coil bottom plate.

[0014] Furthermore, end closing mechanisms are provided at both ends of the second conductive strip, and the end closing mechanisms include a junction box, the ends of the second conductive strip are arranged in the junction box, and the junction box is connected to an end pressing push block, and the end pressing push block is arranged facing the ends of the second conductive strip.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Multiple first conductive forks of a "U"-shaped structure are inserted into one circumference of the bearing ring workpiece, and then connected with multiple second conductive strips to form a complete circumferential magnetization current path. Since the two sides of the first conductive fork are respectively located near the inner and outer surfaces of the bearing ring workpiece, when the bearing ring workpiece is circumferentially magnetized, the difference in magnetic field intensity between the inner and outer surfaces of the bearing ring workpiece can be significantly reduced, thereby ensuring the flaw detection effect of the inner and outer surfaces of the bearing ring workpiece;

[0017] 2. Through the circumferential magnetization current path formed by the first fork-shaped magnetization unit and the second fork-shaped magnetization unit, the longitudinal magnetization current path is formed through the two ends of the first annular energized coil and the second annular energized coil, and the overall flaw detection effect is improved by the two-way composite magnetization of circumferential magnetization and longitudinal magnetization;

[0018] 3. Hoist the bearing ring workpiece onto two ring rollers, and drive the bearing ring workpiece to rotate through the rotation of the ring rollers, so as to observe the surface flaw detection. At the same time, the ring rollers can be lifted and lowered by using the lifting frame. When lifting the ring rollers of different sizes, the center of the bearing ring workpiece can always be aligned with the center of the circumferential magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an automatic bearing ring flaw detector based on a fork-shaped coil mentioned in the present invention;

[0020] Figure 2 A top view of the structure of an automatic bearing ring flaw detector based on a fork-shaped coil mentioned in the present invention;

[0021] Figure 3 It is a structural schematic diagram of an automatic bearing ring flaw detector based on a fork-shaped coil mentioned in the present invention when performing flaw detection on a bearing ring workpiece;

[0022] Figure 4 is a schematic structural diagram of the first fork-shaped magnetization unit mentioned in the present invention;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of the first fork-shaped magnetization unit mentioned in the figure after removing the first fork-shaped coil bottom plate;

[0024] Figure 6 is a schematic structural diagram of the second fork-shaped magnetization unit mentioned in the present invention;

[0025] Figure 7 for Figure 6 A schematic diagram of the structure of the second fork-shaped magnetization unit mentioned in the figure after removing the second fork-shaped coil bottom plate;

[0026] Figure 8 is a schematic structural diagram of the second conductive strip mentioned in the present invention;

[0027] Fig. 9 It is a schematic structural diagram of the bearing ring installation unit mentioned in the present invention when the bearing ring workpiece is installed.

[0028] In the figure:

[0029] 100, equipment rack, 110, first magnetization unit driving device, 120, second magnetization unit driving device, 130, installation unit driving device;

[0030] 200, first fork-shaped magnetization unit, 210, first fixing seat, 220, first coil bottom plate, 230, first annular energized coil, 240, first conductive fork, 250, first fork-shaped coil bottom plate,;

[0031] 300, second fork-shaped magnetizing unit, 310, second fixing seat, 320, second coil bottom plate, 330, second annular energized coil, 340, second conductive strip, 350, end closing mechanism, 351, junction box, 352, end pressing push block, 360, second fork-shaped coil bottom plate;

[0032] 400, bearing ring installation unit, 410, translation base, 420, lifting frame, 430, roller installation plate, 440, ring roller, 450, roller rotation drive device, 460, anti-collision and anti-skew rod group;

[0033] 500, liquid collecting tank;

[0034] 600, toroidal coil transformer;

[0035] 700, fork coil transformer;

[0036] 800, bearing ring workpiece;

[0037] 900. Magnetic rod for flaw detection. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] For example, see the attached Figure 1 , Attachment Figure 2 The present invention provides an automatic bearing ring flaw detector based on a fork-shaped coil, comprising an equipment frame 100, the equipment frame 100 is provided with a first magnetization unit track, a second magnetization unit track and an installation unit moving track, the first magnetization unit track, the second magnetization unit track and the installation unit moving track are respectively provided with a first fork-shaped magnetization unit 200, a second fork-shaped magnetization unit 300 and a bearing ring installation unit 400 slidingly, and the equipment frame 100 is also provided with a first magnetization unit driving device 110, a second magnetization unit driving device 120 and an installation unit driving device 130, in this embodiment, combined with actual production, the first magnetization unit driving device 110, the second magnetization unit driving device 120 and the installation unit driving device 130 are all in the form of linear cylinders, and the three driving devices are respectively used to drive the first fork-shaped magnetization unit 200, the second fork-shaped magnetization unit 300 and the bearing ring installation unit 400 to reciprocate along their respective tracks;

[0040] Among them, as attached Fig. 9As shown, the bearing ring installation unit 400 is used to install the bearing ring workpiece 800 to be tested, and the bearing ring installation unit 400 includes a translation base 410. The bearing ring installation unit 400 is slidably installed on the installation unit moving track through the translation base 410. The installation unit driving device 130 drives the translation base 410 to drive the bearing ring installation unit 400 to move from one side of the first fork-type magnetizing unit 200 and the second fork-type magnetizing unit 300 to between the first fork-type magnetizing unit 200 and the second fork-type magnetizing unit 300, so that the bearing ring to be tested can be realized. For automatic loading of workpiece 800, a lifting frame 420 is fixedly installed on the translation base 410, and the lifting frame 420 is fixedly connected to a roller mounting plate 430. Two ferrule rollers 440 are arranged in parallel and spaced apart on the roller mounting plate 430. The two ferrule rollers 440 are arranged to rotate. At the same time, a roller rotation driving device 450 is also arranged on the roller mounting plate 430. The roller rotation driving device 450 is connected to the two ferrule rollers 440 for driving. The roller rotation driving device 450 is used to drive the two ferrule rollers 440 to rotate synchronously in the same direction. The bearing ring workpiece 800 to be tested is facing the inner side. The bearing ring workpiece 800 to be inspected can be driven to rotate by the rotation of the ring rollers 440, so that the operator can conveniently observe the inspection condition of the bearing ring workpiece 800 in detail during the inspection process. The ring rollers 440 realize the lifting function through the lifting frame 420, so that the ring rollers 440 can adjust the hole center position of the bearing ring workpiece 800 it lifts, so as to ensure that the bearing ring workpieces 800 of different sizes can always be located in the first fork-shaped magnetization unit 20 0 and the center position of the second fork-shaped magnetizing unit 300 are magnetized, ensuring that the circumferential magnetic field of the bearing ring workpiece 800 is uniform during the flaw detection process. The translation base 410 is fixedly provided with a ring anti-collision and anti-skew device, which is arranged below the ring roller 440. The ring anti-collision and anti-skew device includes two groups of anti-collision and anti-skew rod groups 460 arranged at intervals. The bearing ring workpiece 800 is installed between the two groups of anti-collision and anti-skew rod groups 460, mainly to prevent the bearing ring workpiece 800 from tilting greatly during the rotation process, and to stabilize the detection position of the bearing ring workpiece 800.

[0041] At the same time, as attached Figures 4 to 8As shown, the first fork-shaped magnetization unit 200 includes a first fixed seat 210, and the first fixed seat 210 is provided with a flaw detection magnetic rod 900, and the flaw detection magnetic rod 900 can be inserted into the hole center position of the bearing ring workpiece 800 to be detected. The second fork-shaped magnetization unit 300 includes a second fixed seat 310, and the first fixed seat 210 and the second fixed seat 310 can move toward each other or move away from each other under the drive of the first magnetization unit driving device 110 and the second magnetization unit driving device 120. The first fixed seat 210 is fixedly provided with a first coil bottom plate 220, and the first coil bottom plate 220 is fixedly provided with a first annular energized coil 230, and the first annular energized coil 230 is fixedly provided with a first fork-shaped coil bottom plate 220 on the side away from the first coil bottom plate 220. 50, a first fork-shaped coil bottom plate 250 is fixedly provided with a plurality of first conductive forks 240 arranged in a circular array on the side facing the second fork-shaped magnetizing unit 300, and the first conductive fork 240 is a "U"-shaped structure. When the bearing ring workpiece 800 is inspected, the bearing ring workpiece 800 will be inserted between the two sides of the "U"-shaped first conductive fork 240 along the axis of the center hole, and a second fixed seat 310 is fixedly provided with a second coil bottom plate 320, and a second annular energized coil 330 is fixedly provided on the second coil bottom plate 320, and a second fork-shaped coil bottom plate 360 ​​is fixedly provided on the side of the second annular energized coil 330 away from the second coil bottom plate 320, and a plurality of first conductive forks 240 are fixedly provided on the side facing the first fork-shaped magnetizing unit 200 on the second fork-shaped coil bottom plate 360 The second conductive strips 340 are arranged in a circular array, and end closing mechanisms 350 are provided at both ends of the second conductive strips 340. The end closing mechanisms 350 include a junction box 351. The ends of the second conductive strips 340 are arranged in the junction box 351. The junction box 351 is connected to an end pressing push block 352. The end pressing push block 352 is made of an insulating material. The end pressing push block 352 is arranged facing the end of the second conductive strip 340. The end pressing push block 352 is driven by a linear cylinder. In the process of the first fixed seat 210 and the second fixed seat 310 moving toward each other, the first conductive forks 240 and the second conductive strips 340 are connected end to end in sequence to form a complete circumferential magnetization current path. In the way of forming the circumferential magnetization current path, the circumferential The tail end of the first first conductive fork 240 in the magnetizing current path is inserted into the end closing mechanism 350 at the head end of the first second conductive strip 340. At this time, the tail end of the first first conductive fork 240 is located between the head end of the first second conductive strip 340 and the end pressing push block 352. Then, the tail end of the first conductive fork 240 and the head end of the first second conductive strip 340 can be pressed together to form an electrical connection through the end pressing push block 352. The tail end of the subsequent first second conductive fork is electrically connected to the head end of the second first conductive fork 240 through the same end closing mechanism 350. The subsequent first conductive forks 240 and the second conductive strips 340 are connected end to end in the above manner, so that a complete circumferential magnetizing current path is finally formed.The head end of the first first conductive fork 240 and the tail end of the last second conductive strip 340 are used to connect to a power source to supply energy to the circumferential magnetizing current path.

[0042] In order to ensure the normal operation of the equipment, the equipment frame 100 is also provided with a liquid collecting tank 500, a toroidal coil transformer 600 and a fork coil transformer 700. Both ends of the first toroidal energized coil 230 and both ends of the second toroidal energized coil 330 are electrically connected to the toroidal coil transformer 600. The toroidal coil transformer 600 controls the intensity of the longitudinal magnetic field by changing the voltage. Both ends of the circumferential magnetization current path formed by connecting a plurality of first conductive forks 240 and a plurality of second conductive strips 340 are electrically connected to the fork coil transformer 700 respectively. The fork coil transformer 700 controls the intensity of the circumferential magnetic field by changing the voltage.

[0043] The working principle of this embodiment is as follows:

[0044] In the initial state, the bearing ring installation unit 400 is located on one side of the first fork-shaped magnetization unit 200 and the second fork-shaped magnetization unit 300, and the first conductive fork 240 and the second conductive strip 340 are in a separated state. Fig. 9As shown, the bearing ring workpiece 800 is hoisted onto two ring rollers 440. At this time, the inner side surface of the bearing ring workpiece 800 is in contact with the ring rollers 440, and the lower part of the bearing ring workpiece 800 is arranged between the two anti-collision and anti-skew rod groups 460. Then, according to the inner and outer diameter dimensions of the bearing ring workpiece 800, the height of the bearing ring workpiece 800 is adjusted by the lifting frame 420, so that the hole center of the bearing ring workpiece 800 and the central axis of the flaw detection magnetic rod 900 are at the same height. At this time, the installation unit driving device 130 drives the translation base 410 to move the shaft on which the bearing ring workpiece 800 to be tested is installed. The bearing ring installation unit 400 moves between the first fork-shaped magnetization unit 200 and the second fork-shaped magnetization unit 300. After moving into position, the hole center of the bearing ring workpiece 800 to be detected is located on the central axis of the flaw detection magnetic rod 900. At this time, the first fork-shaped magnetization unit 200 and the second fork-shaped magnetization unit 300 are driven by the first magnetization unit driving device 110 and the second magnetization unit driving device 120 to move toward each other. During the approaching process, the flaw detection magnetic rod 900 will be inserted into the hole center position of the bearing ring workpiece 800, and the annular structure of the bearing ring workpiece 800 will be inserted into the "U"-shaped structure. The first conductive fork 240 is formed between two side edges of the first conductive fork 240, so that the two side edges of the first conductive fork 240 will be close to the inner wall and the outer wall of the bearing ring workpiece 800 respectively, which ensures that the magnetic field strength received by the inner wall and the outer wall of the bearing ring workpiece 800 in the subsequent process is similar. After the first fork-shaped magnetization unit 200 and the second fork-shaped magnetization unit 300 move towards each other and approach each other, the tail end of the first first conductive fork 240 will be inserted into the end closing mechanism 350 at the head end of the first second conductive strip 340. At this time, by driving the end pressing push block 352, the first conductive fork 240 can be closed. The tail end of the first conductive fork 240 is pressed and fit tightly with the head end of the second conductive strip 340. In the same principle, the head end of the next first conductive fork 240 will be inserted into the end closing mechanism 350 at the tail end of the first second conductive strip 340 and fit with the tail end of the second conductive strip 340. Several first conductive forks 240 and several second conductive strips 340 are connected head to tail in sequence, and finally a complete circumferential magnetization current path will be formed. The head end of the first first conductive fork 240 and the tail end of the last second conductive strip 340 are connected to the fork coil transformer 700 as the two ends of the circumferential magnetization current path. The state of the equipment before flaw detection is as shown in the attached figure. Figure 3As shown, at this time, the flaw detection power supply is started, the ring roller 440 starts to rotate and drives the bearing ring workpiece 800 to start rotating, and the matching magnetic suspension spraying device sprays the magnetic suspension to the bearing ring workpiece 800, and the bearing ring workpiece 800 stops rotating and starts to be magnetized. Through the combination of the first annular energized coil 230, the second annular energized coil 330 and the flaw detection magnetic rod 900, a magnetic field parallel to the axis of the first annular energized coil 230 and the second annular energized coil 330 can be generated on the bearing ring workpiece 800. This method is used to check for transverse defects in which the magnetic lines of force are perpendicular to the axis of the bearing ring workpiece 800, and the first conductive fork 240 and the second conductive strip 340 form a magnetic field. The circumferential magnetization current path can generate a circumferential magnetic field on the bearing ring workpiece 800. This method is used to detect radial defects on the brake disc workpiece. The above two magnetizations can be used separately or simultaneously. When the bearing ring workpiece 800 is magnetized circumferentially and longitudinally at the same time, since the phase difference between the two magnetic fields is 120°, their synthetic magnetic field is an elliptical magnetic field, which can detect all-round defects on the workpiece surface. This composite magnetization is inspected by a continuous method. After the magnetization is completed, the bearing ring workpiece 800 is driven to rotate by the rotation of the ring roller 440. During the rotation of the bearing ring workpiece 800, the operator can observe the defects on the surface of the bearing ring workpiece 800 with the naked eye. After the inspection is completed, the bearing ring workpiece 800 begins the demagnetization step. The specific demagnetization methods are as follows: circumferential magnetization, circumferential demagnetization, longitudinal magnetization, longitudinal demagnetization, composite magnetization, and longitudinal demagnetization. When the +5V voltage passes through the capacitor and relay KA3, due to the effect of the capacitor, the voltage of CON gradually changes from +5V to smaller, the conduction angle of the trigger module changes from larger to smaller, and the current of the secondary circuit also changes from larger to smaller to achieve current attenuation demagnetization. In the above-mentioned magnetization and demagnetization process, the AC main circuit adopts thyristor control technology for stepless voltage regulation, so that the magnetization current can be continuously adjusted. When the magnetization starts, the voltage gradually increases, and the power-off phase controller is used to convert the AC mains into low-voltage AC. The primary uses two anti-parallel thyristors. , the output voltage can be adjusted by adjusting the conduction angle of the two thyristors at the same time. When a load is added to the secondary of the transformer, the current passing through the load also changes accordingly. When the circumferential potentiometer is adjusted to change its resistance value, the trigger pulse changes continuously in the range of 0 to 180 degrees, thereby achieving the purpose of continuously adjusting the current. The trigger circuit adopts an RS trigger in design. When the magnetization stops, the trigger pulse is not cut off until it crosses the zero point, so it has a power-off phase function. The magnetizing current is coupled by the current transformer and indicated by the ammeter. The magnetizing current changes accordingly by adjusting the potentiometer. In the demagnetization state, the trigger pulse gradually decays after starting, and the magnetic field on the surface of the workpiece will gradually drop to zero.

[0045] After the flaw detection is completed, the first magnetization unit driving device 110 and the second magnetization unit driving device 120 are driven to move the first fork-shaped magnetization unit 200 and the second fork-shaped magnetization unit 300 away from each other and separate, and the installation unit driving device 130 drives the bearing ring installation unit 400 to be pushed out between the first fork-shaped magnetization unit 200 and the second fork-shaped magnetization unit 300, and then the bearing ring workpiece 800 after the flaw detection is completed is removed, completing the entire flaw detection process.

[0046] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention by using the above technical solutions or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An automatic bearing ring flaw detector based on a fork-shaped coil, characterized in that: include: An equipment rack (100) for mounting each unit; A bearing ring installation unit (400) is used to install a bearing ring workpiece (800) to be tested, the bearing ring installation unit (400) comprising a lifting frame (420), the lifting frame (420) being fixedly connected to a roller installation plate (430), the roller installation plate (430) being provided with at least one ring roller (440); A first fork-shaped magnetizing unit (200) and a second fork-shaped magnetizing unit (300) are slidably arranged on an equipment frame (100); the first fork-shaped magnetizing unit (200) comprises a first fixing seat (210); the second fork-shaped magnetizing unit (300) comprises a second fixing seat (310); the equipment frame (100) is provided with a first magnetizing unit driving device (110) for driving the first fixing seat (210) to move and a second magnetizing unit driving device (120) for driving the second fixing seat (310) to move; the first fixing seat (210) and the second fixing seat (310) are arranged on the first magnetizing unit driving device (110) and the second magnetizing unit driving device (120) The first fixing seat (210) is driven by a first anode and a cathode ray tube (214) to move closer to each other or move away from each other in opposite directions. The first fixing seat (210) is provided with a first annular energized coil (230) and a plurality of first conductive forks (240) arranged in an annular array, and the first conductive forks (240) are of a "U"-shaped structure. The second fixing seat (310) is provided with a second annular energized coil (330) and a plurality of second conductive strips (340) arranged in an annular array. When the first fixing seat (210) and the second fixing seat (310) move closer to each other, the plurality of first conductive forks (240) and the plurality of second conductive strips (340) are connected end to end in sequence to form a complete circumferential magnetization current path.

2. The automatic bearing ring flaw detector based on a fork-shaped coil according to claim 1 is characterized in that: The first fixing seat (210) is provided with a flaw detection magnetic rod (900), and the flaw detection magnetic rod (900) can be inserted into the center position of the hole of the bearing ring workpiece (800) to be detected.

3. The automatic bearing ring flaw detector based on a fork-shaped coil according to claim 2 is characterized in that: The number of the ring rollers (440) is two, and the two ring rollers (440) are arranged on the roller mounting plate (430) for parallel rotation. The roller mounting plate (430) is also provided with a roller rotation driving device (450), and the roller rotation driving device (450) is drivingly connected to the two ring rollers (440). The roller rotation driving device (450) is used to drive the two ring rollers (440) to rotate synchronously in the same direction.

4. The automatic bearing ring flaw detector based on a fork-shaped coil according to claim 3 is characterized in that: The equipment frame (100) is provided with an installation unit moving track and an installation unit driving device (130); the bearing ring installation unit (400) comprises a translation base (410); the lifting frame (420) is fixedly connected to the translation base (410); the translation base (410) is slidably connected to the installation unit moving track; the installation unit driving device (130) is used to drive the translation base (410) to reciprocate on the installation unit moving track; the translation base (410) can move from one side of the first fork-shaped magnetization unit (200) and the second fork-shaped magnetization unit (300) to between the first fork-shaped magnetization unit (200) and the second fork-shaped magnetization unit (300) through the installation unit moving track and the installation unit driving device (130).

5. The automatic bearing ring flaw detector based on a fork-shaped coil according to claim 4 is characterized in that: The translation base (410) is fixedly provided with a ferrule anti-collision and anti-skew device, the ferrule anti-collision and anti-skew device is arranged below the ferrule roller (440), and the ferrule anti-collision and anti-skew device comprises two groups of anti-collision and anti-skew rod groups (460) arranged at intervals.

6. The automatic bearing ring flaw detector based on a fork-shaped coil according to claim 5 is characterized in that: The equipment frame (100) is provided with a liquid collecting tank (500), a toroidal coil transformer (600) and a fork coil transformer (700); both ends of the first toroidal energized coil (230) and both ends of the second toroidal energized coil (330) are electrically connected to the toroidal coil transformer (600); and both ends of a circumferential magnetizing current path formed by connecting the plurality of first conductive forks (240) and the plurality of second conductive strips (340) are electrically connected to the fork coil transformer (700) respectively.

7. The automatic bearing ring flaw detector based on a fork-shaped coil according to claim 6 is characterized in that: The first fixing seat (210) is fixedly provided with a first coil bottom plate (220), the first annular energized coil (230) is fixedly provided on the first coil bottom plate (220), a first forked coil bottom plate (250) is fixedly provided on the side of the first annular energized coil (230) away from the first coil bottom plate (220), the first conductive fork (240) is fixedly provided on the first forked coil bottom plate (250), the second fixing seat (310) is fixedly provided with a second coil bottom plate (320), the second annular energized coil (330) is fixedly provided on the second coil bottom plate (320), a second forked coil bottom plate (360) is fixedly provided on the side of the second annular energized coil (330) away from the second coil bottom plate (320), and the second conductive strip (340) is fixedly provided on the second forked coil bottom plate (360).

8. The automatic bearing ring flaw detector based on a fork-shaped coil according to claim 7 is characterized in that: End closing mechanisms (350) are provided at both ends of the second conductive strip (340), the end closing mechanism (350) comprising a junction box (351), the end of the second conductive strip (340) is arranged in the junction box (351), the junction box (351) is connected to an end pressing push block (352), and the end pressing push block (352) is arranged facing the end of the second conductive strip (340).

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