A motor stator core oil hole penetration detection device and detection method

Abstract

The present invention discloses a device and method for detecting the continuity of oil holes in the stator core of a motor. The device comprises a workbench panel fixed to a profile base by bolts, a workpiece rotating table is arranged in the middle of the workbench panel, and light source sliding mechanisms and camera sliding mechanisms are arranged relatively on the workbench panels on both sides of the workpiece rotating table; a rotating mechanism for driving the workpiece rotating table to rotate horizontally is also arranged on the bottom end surface of the workbench panel; the workpiece rotating table, the rotating mechanism, the light source sliding mechanism and the camera sliding mechanism are all controlled and coordinated by a PLC control system to complete the detection of the continuity of the oil holes in the stator core. The present invention can not only realize the automatic detection of the continuity of the oil holes in the stator core of the motor, but also realize the detection of a large number of oil holes in the stator core of the motor with different hole shapes and small sizes. The detection results can be observed intuitively, with high detection efficiency and good detection effect.

Description

Technical Field

[0001] The invention relates to the technical field of motor iron core oil through hole detection, and in particular to a device and method for detecting the penetration of a motor stator iron core oil through hole. Background Art

[0002] In recent years, the development of the automobile industry has faced energy shortages and environmental pollution problems. The development of new energy vehicles is the only way to solve these problems. With the development of new energy electric vehicles, high precision, high power and other performance requirements are put forward for motors. The temperature rise of the motor is one of the main factors limiting the power of the motor. In order to ensure the high-performance operation of the motor, the stator core of the motor is provided with a dense oil hole structure on its outer edge to facilitate the circulation of cooling oil during the operation of the motor, so as to ensure that the motor can fully dissipate heat during operation.

[0003] The stator core is made of stator loose sheets stacked in a certain pattern. The oil holes of the stator core are punched on each lamination by metal fingers in the stamping die. Due to the complex process, it is inevitable that the oil holes of the assembled stator core will be blocked. The reasons are mainly reflected in the following aspects: 1) Because the fingers are small, they are prone to wear and even breakage, resulting in the corresponding holes not being punched out normally, which may cause blockage in the oil hole structure; 2) The mixing of waste sheets during the stamping process can easily cause partial blockage of the oil passage; 3) When the stator loose sheets are stacked in a certain pattern to stack the stator core, whether it is manual or automatic, there is a possibility of wrong sheets, missing sheets or wrong stacking angles. Once one of the loose sheets of the entire stator core is incorrect, it is very likely to cause the oil hole to be blocked.

[0004] Since the stator core oil holes have different shapes, a large number, small size (0.1mm~3mm) and deep holes, the existing process cannot fully guarantee that the stator core oil holes are completely through. Manual inspection is inconvenient, inefficient and labor-intensive, which requires corresponding equipment to detect the continuity of the stator core oil holes. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a detection device and a detection method for the continuity of the oil holes of the stator core of a motor, which are used to ensure 100% detection of the continuity of the oil holes of the stator core and further ensure product quality.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0007] A motor stator core oil hole penetration detection device comprises a workbench panel fixed to a profile base by bolts, a workpiece rotating table is arranged in the middle of the workbench panel, and a light source sliding mechanism and a camera sliding mechanism are arranged relatively on the workbench panels on both sides of the workpiece rotating table; a rotating mechanism for driving the workpiece rotating table to rotate horizontally is also arranged on the bottom end surface of the workbench panel; the workpiece rotating table, the rotating mechanism, the light source sliding mechanism and the camera sliding mechanism are all controlled and coordinated by a PLC control system to complete the stator core oil hole penetration detection work.

[0008] The above-mentioned motor stator core oil hole penetration detection device, the light source sliding mechanism includes a first servo motor and a first slide rail mechanism, a first sliding plate is arranged on the first slide rail mechanism, the first sliding plate and the first servo motor are connected by a first transmission mechanism, and a parallel light source perpendicular to the first sliding plate is arranged on the first sliding plate through a light source fixing frame.

[0009] The above-mentioned motor stator core oil hole penetration detection device, the camera sliding mechanism includes a second servo motor and a second slide rail mechanism, the second slide rail mechanism is provided with a second sliding plate, the second sliding plate is connected to the output shaft of the second servo motor through a second transmission mechanism, a telecentric lens is fixedly provided on the second sliding plate through a V-shaped frame, and a camera is also fixedly provided on the second sliding plate located behind the telecentric lens through a support assembly.

[0010] The above-mentioned motor stator core oil hole penetration detection device, the rotating mechanism includes a pair of divider support plates fixedly mounted on the bottom end surface of the workbench panel, the bottom ends of the two divider support plates are fixedly connected by a divider fixing plate; a stepper motor is arranged on the divider fixing plate via a stepper motor fixing plate, a cam divider is fixedly arranged on the divider fixing plate on one side of the stepper motor, and the input end of the cam divider is connected to the stepper motor via a fourth synchronous pulley assembly; the side of the cam divider opposite to the fourth synchronous pulley assembly is connected to a cam via the third rotating shaft of the cam divider.

[0011] In the above-mentioned motor stator core oil hole penetration detection device, the top end of the cam divider is provided with a second rotating axis of the cam divider; the workpiece rotating table includes a rotating base fixedly arranged on the second rotating axis of the cam divider, a roller wall panel perpendicular to the rotating base is fixedly arranged on one side of the top end surface of the rotating base, a bearing mechanism for placing the stator core to be detected is arranged on the inner wall of the roller wall panel located above the rotating base, and the rotating base is also fixedly provided with a third servo motor through a motor fixing block, and the output end of the third servo motor is connected to the controlled end of the bearing mechanism through a third synchronous pulley assembly.

[0012] The above-mentioned motor stator core oil hole penetration detection device, the bearing mechanism includes a plurality of rotating shafts arranged on the inner wall of the roller wall plate through bearings and parallel to the rotating base, the plurality of rotating shafts are evenly distributed and arranged in a ring, a rotating shaft is arranged directly above the third servo motor, and the other rotating shafts on both sides of the middle rotating shaft are sleeved with rollers that support the stator core to be detected, and the middle rotating shaft and the third servo motor and the two adjacent rotating shafts are connected by a third synchronous pulley assembly.

[0013] The above-mentioned motor stator core oil hole penetration detection device, the PLC control system includes a PC, a PLC controller, a switch, a first servo drive, a second servo drive, a third servo drive, a stepper drive, and a communication module; the PC and the switch are connected to the PLC controller via a network cable; the first servo drive, the second servo drive, the third servo drive, and the communication module are connected to the switch via a network cable, and the stepper drive is directly connected to the PLC controller.

[0014] In the above-mentioned motor stator core oil hole penetration detection device, the light source sliding mechanism and the camera sliding mechanism are both provided with a limit sensor group, the rotating mechanism is provided with a photoelectric sensor, the limit sensor group and the photoelectric sensor are respectively connected to the PLC controller through wires; the camera sliding mechanism is also provided with a distance measuring sensor connected to the communication module through a cable.

[0015] A method for detecting the continuity of an oil hole in a motor stator core is implemented based on a device for detecting the continuity of an oil hole in a motor stator core, and specifically comprises the following steps:

[0016] First, after the stator core to be inspected is grabbed onto the workpiece rotating table and scanned successfully, the PLC controller controls the rotating mechanism to rotate 90º clockwise to the inspection station, and then controls the bearing mechanism on the workpiece rotating table to drive the stator core to rotate 240º axially. The PLC controller reads multiple feedback values ​​of the distance measuring sensor through the communication module to calculate the average value;

[0017] Secondly, according to the average value calculated by the PLC controller, the PLC controller controls the first sliding plate of the light source sliding mechanism and the second sliding plate of the camera sliding mechanism to move on their respective linear guide rails, driving the light source and the camera lens to move to the photographing station;

[0018] Then, after the camera takes a photo, it compares the location of the oil hole with the standard position and feeds it back to the PLC controller to calculate the angle correction value; the PLC controller controls the workpiece rotating table to make the stator core under inspection return to the standard position to solve the distribution deviation problem of each hole type; after that, the camera takes a photo every time the stator core rotates 20° in the axial direction until the stator core completes a rotation;

[0019] Finally, the PLC controller controls the light source sliding mechanism and the camera sliding mechanism to return to the origin, and the rotating mechanism rotates 90º counterclockwise to the unloading station.

[0020] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0021] The present invention can realize automatic detection of the continuity of the oil holes of the motor stator core, which has high detection efficiency and high detection effect; it can realize the detection of a large number of motor stator core oil holes with different hole shapes and small sizes, with human-computer communication prompt information, the detection results can be observed intuitively, and the detection effect is good; it can also bind the detection results and the collected pictures with the product QR code information to form a local file and store it in a PC, so that customers can trace the product oil hole continuity detection information.

[0022] The detection device described in the present invention is a movable equipment and can be added to one side of the stator core discharging station. It can not only utilize the space of the existing site, but also does not need to change the production line structure. It can reliably ensure 100% detection of the penetration of the stator core oil hole, and further ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a motor stator core oil hole penetration detection device according to the present invention.

[0024] Figure 2 The present invention is a schematic diagram of a light source sliding mechanism of a motor stator core oil hole penetration detection device.

[0025] Figure 3 It is a schematic diagram of the camera sliding mechanism of the motor stator core oil hole penetration detection device of the present invention.

[0026] Figure 4 The present invention is a schematic diagram of the rotating mechanism of the motor stator core oil hole penetration detection device.

[0027] Figure 5 It is a schematic diagram of another axial side of the rotating mechanism of the motor stator core oil hole penetration detection device of the present invention;

[0028] Figure 6 The present invention is a schematic diagram of a workpiece rotating table of a motor stator core oil hole penetration detection device.

[0029] Figure 7 The present invention is a schematic diagram of a PLC control system of a motor stator core oil hole penetration detection device.

[0030] Among them: 1. Display screen, 2. Protective cover, 3. Workbench panel, 4. Profile base, 5. Electric control cabinet, 6. Anti-slip feet, 7. PC host, 8. Rotation mechanism, 9. Control box, 10. Camera sliding mechanism, 11. Workpiece rotating table, 12. Light source sliding mechanism, 13. Parallel light source, 14. Light source fixing frame, 15. First sliding plate, 16. First ball screw assembly, 17. First stop bearing, 18. First motor fixing plate, 19. First synchronous pulley assembly, 20. First screw fixing bearing seat, 21. First servo motor, 22. First anti-collision block, 23, first guide rail spacer, 24, first guide rail slider, 25, first shading plate, 26, first slide rail, 27, first linear guide rail, 28, first limit sensor group, 29, ranging sensor, 30, L-shaped bracket, 31, telecentric lens, 32, V-shaped bracket, 33, second sliding plate, 34, second guide rail spacer, 35, second shading plate, 36, second guide rail slider, 37, second linear guide, 38, second slide rail, 39, second limit sensor group, 40, second anti-collision block, 41, second servo motor, 42, second motor fixing plate, 43. Second synchronous pulley assembly, 44. Second screw fixed bearing seat, 45. Second ball screw assembly, 46. Support assembly, 47. Camera, 48. Divider support plate, 49. Stepper motor, 50. Planetary gear reducer, 51. Stepper motor fixing plate, 52. Indexing motor tensioning strip, 53. Fourth synchronous pulley assembly, 54. Divider fixing plate, 55. Cam divider first rotating shaft, 56. Auxiliary fixing member, 57. Cam divider, 58. Cam divider second rotating shaft, 59. Dividing sensor bracket, 60. Photoelectric sensor, 61 , cam, 62, the third rotating axis of the cam divider, 63, the roller wall panel, 64, the roller, 65, the opening support column, 66, the tension strip, 67, the bearing, 68, the rotating base plate, 69, the rotating base plate, 70, the motor fixing block, 71, the third servo motor, 72, the third synchronous pulley assembly, 73, the rotating axis, 74, the cam bearing follower, 75, the first servo drive, 76, the second servo drive, 77, the third servo drive, 78, the communication module, 79, the switch, 80, the PLC controller, 81, the stepping drive, 82, the PC. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] A motor stator core oil hole penetration detection device, the structure of which is as follows Figures 1 to 6 As shown, it includes a profile base 4, a worktable panel 3, a workpiece rotating table 11, a light source sliding mechanism 12, a camera sliding mechanism 10, a rotating mechanism 8 and a PLC control system.

[0033] The workbench panel 3 is fixed to the profile base 4 by bolts, and the four corners of the profile base 4 are provided with anti-skid feet 6.

[0034] The workpiece rotating table 11 is arranged in the middle of the worktable panel 3, and is used to support the stator core to be detected. The light source sliding mechanism 12 and the camera sliding mechanism 10 are relatively arranged on the worktable panel 3 on both sides of the workpiece rotating table 11. The light source sliding mechanism 12 is used to adjust the distance of the detection light source relative to the stator core to be detected, and the camera sliding mechanism is used to adjust the distance of the camera relative to the stator core to be detected to ensure the best detection effect. The rotating mechanism 8 is arranged on the bottom end surface of the worktable panel 3, and is used to drive the workpiece rotating table 11 to rotate horizontally and switch different workstations.

[0035] The rotating mechanism 8, the workpiece rotating platform 11, the light source sliding mechanism 12 and the camera sliding mechanism 10 are all controlled by a PLC control system to coordinately complete the penetration detection of the oil through hole of the stator core.

[0036] The structure of the light source sliding mechanism 12 is as follows Figure 2 As shown, it includes a first servo motor 21 and a first slide rail mechanism, the first servo motor 21 is installed on the top surface of the workbench panel 3 through a first motor fixing plate 18; a first sliding plate 15 is arranged on the first slide rail mechanism, and the first sliding plate 15 and the first servo motor 21 are connected through a first transmission mechanism; a parallel light source 13 is arranged on the first sliding plate 15 through a light source fixing frame 14, and the parallel light source 13 is perpendicular to the first sliding plate.

[0037] The first slide rail mechanism includes a first linear guide rail 27, a first guide rail slider 24, a first slide rail 26, a first limit sensor group 28, a first anti-collision block 22, and a first guide rail pad 23. The first linear guide rail 27 is installed on the first guide rail pad 23 by bolts, and the first guide rail pad 23 is arranged on the first slide rail 26; the first anti-collision block 22 is installed on both sides of the first guide rail pad 23 by bolts; the first sliding plate 15 is installed on the first linear guide rail 27 through the first guide rail slider 24; the first limit sensor group 28 is installed on the first slide rail 26 by bolts.

[0038] In this embodiment, a first shading plate 25 is installed on the side of the first sliding plate 15 through a bracket. The first shading plate 25 is arranged horizontally corresponding to the first limit sensor group 28. The first limit sensor group 28 adopts a photoelectric sensor, which can block the photoelectric sensor by a non-contact method, so that the photoelectric sensor generates a signal, thereby limiting the movement range of the first sliding plate 15.

[0039] The first transmission mechanism includes a first synchronous pulley assembly 19, a first stop bearing 17, a first ball screw assembly 16, and a first screw fixed bearing seat 20. A first screw fixed bearing seat 20 is fixedly connected above the first servo motor 21 and on the bottom end surface of the first sliding plate 15, respectively. The first ball screw assembly 16 is rotatably connected between the two first screw fixed bearing seats 20; the first synchronous pulley assembly 19 is installed between one end of the first ball screw assembly 16 and the output shaft of the first servo motor 21, and the first ball screw assembly 16 is installed with a synchronous wheel of the first synchronous pulley assembly 19 through the first stop bearing 17.

[0040] The structure of the camera sliding mechanism 10 is as follows Figure 3 As shown, it includes a second servo motor 41 and a second slide rail mechanism. The second servo motor 41 is installed on the top surface of the workbench panel 3 through a second motor fixing plate 42; a second sliding plate 33 is arranged on the second slide rail mechanism, and the second sliding plate 33 is connected to the output shaft of the second servo motor 41 through a second transmission mechanism. A telecentric lens 31 is fixedly arranged on the second sliding plate 33 through a V-shaped frame 32, and the telecentric lens is arranged to face the parallel light source; a camera 47 is also fixedly arranged on the second sliding plate 33 located behind the telecentric lens through a supporting assembly 46.

[0041] The second slide rail mechanism includes a second linear guide rail 37, a second guide rail slider 36, a second slide rail 38, a second limit sensor group 39, a second anti-collision block 40, and a second guide rail pad 34; the second linear guide rail 37 is installed on the second guide rail pad 34 by bolts, and the second guide rail pad 34 is arranged on the second slide rail 38; the second anti-collision block 40 is installed on both sides of the second guide rail pad 34 by bolts; the second sliding plate 33 is installed on the second linear guide rail 37 through the second guide rail slider 36; the second limit sensor group 39 is installed on the second slide rail 38 by bolts.

[0042] In this embodiment, a second shading plate 35 is installed on the side of the second sliding plate 33 through a bracket. The second shading plate 35 is arranged in the horizontal direction corresponding to the second limit sensor group 29. The second limit sensor group 29 adopts a photoelectric sensor, which can block the photoelectric sensor by a non-contact method, so that the photoelectric sensor generates a signal, thereby limiting the movement range of the second sliding plate 33.

[0043] The second transmission mechanism includes a second synchronous pulley assembly 43, a second stop bearing, a second ball screw assembly 45, and a second screw fixed bearing seat 44; a second screw fixed bearing seat 44 is fixedly connected above the second servo motor 41 and on the bottom end surface of the second sliding plate 33, respectively, and the second ball screw assembly 45 is rotatably connected between the two second screw fixed bearing seats 44; the second synchronous pulley assembly 43 is installed between one end of the second ball screw assembly 45 and the output shaft of the second servo motor 41, and the second ball screw assembly 45 is installed with the synchronous wheel of the second synchronous pulley assembly 43 through the second stop bearing.

[0044] Since the position of the stator core to be inspected on the workpiece rotating table 11 is deviated, the present invention installs a distance measuring sensor 29 on the second sliding plate 33 located on the side of the telecentric lens through an L-shaped bracket 30, which is used to measure the distance from the surface of the stator core to be inspected on the workpiece rotating table 11 to the lens 31, and then calibrate the distance at which the lens 31 is correctly focused, thereby ensuring that the lens 31 moves to the corresponding position according to the calibrated distance.

[0045] In this embodiment, two protective covers 2 are also provided on the workbench panel 3 for covering the light source sliding mechanism and the camera sliding mechanism, but the end surfaces of the light source sliding mechanism and the camera sliding mechanism facing the workpiece rotating table 11 are both open to facilitate the detection of the workpiece on the workpiece rotating table 11.

[0046] The structure of the rotating mechanism 8 is as follows: Figure 4 and Figure 5 As shown, it includes a stepper motor 49, a fourth synchronous pulley assembly 53, a cam divider 57, and a dividing motor tensioning strip 52. A pair of divider support plates 48 are vertically arranged on the bottom end surface of the workbench panel 3, and the bottom ends of the two divider support plates 48 are fixedly connected by a divider fixing plate 54.

[0047] The output shaft of the stepper motor 49 is connected to a planetary gear reducer 50; the stepper motor 49 is set on a dividing motor tension strip 52 through a stepper motor fixing plate 51, and the dividing motor tension strip 52 is installed on a divider fixing plate 54 by bolts. The tension of the fourth synchronous belt in the fourth synchronous pulley assembly 53 can be adjusted by sliding the stepper motor fixing plate left and right in the dividing motor tension strip 52.

[0048] The cam divider 57 is fixedly arranged on the divider fixing plate 54 on one side of the stepper motor 49, and the cam divider first rotating shaft 55 of the cam divider 57 is connected to the output shaft of the planetary gear reducer 50 through the fourth synchronous pulley assembly 53. The function of the cam divider is to convert the input continuous rotation drive into the output intermittent rotation action, and the rotation positioning accuracy is high.

[0049] The top of the cam divider is provided with a second rotating shaft 58 of the cam divider; a third rotating shaft 62 of the cam divider is provided on the side of the cam divider 57 opposite to the fourth synchronous pulley assembly 53, and a cam 61 is fixedly provided on the third rotating shaft 62 of the cam divider by a stop screw, such as Figure 5 shown.

[0050] The cam 61 has a light-shielding portion and a light-transmitting portion, and uses the photoelectric sensor 60 to determine whether the cam divider 57 has rotated 90 degrees to the correct position.

[0051] A split sensor bracket 59 and a photoelectric sensor 60 are also provided above the splitter fixing plate 54. The split sensor bracket 59 is mounted on the cam splitter 57 by bolts; the photoelectric sensor 60 is mounted on the split sensor bracket 59 by bolts. Figure 5 shown.

[0052] A group of auxiliary fixing parts 56 are respectively fixed by bolts on the front and rear sides of the divider fixing plate 54, which can disperse the gravity of the rotating mechanism 8 and the workpiece rotating table 11 to part of the profile frame, thereby playing a role in strengthening the connection.

[0053] The structure of the workpiece rotating platform 11 is as follows: Figure 6 As shown, it includes a rotating base, a roller wall plate 63 and a supporting mechanism.

[0054] The rotating base is located above the workbench panel 3 and is arranged parallel to the workbench panel 3, and includes a rotating base plate 69 and a rotating bottom plate 68 fixedly connected together by bolts, wherein the rotating base plate 69 is fixedly arranged on the second rotating shaft 58 of the cam divider.

[0055] A roller wall panel 63 is fixed on the two long sides of the top surface of the rotating base plate 68 by bolts and positioning pins respectively. The roller wall panel 63 is arranged perpendicular to the rotating base plate 68. The two roller wall panels 63 are symmetrical based on the center lines of the two long sides of the rotating base plate 68, and the two roller wall panels 63 are connected together by an open support 65 to play a role of fixed support.

[0056] The bearing mechanism is arranged on the inner wall of the roller wall plate 63 located above the rotating base, and is used for placing the stator core to be inspected.

[0057] A third servo motor 71 is also fixedly disposed on the rotating base plate 68 via a motor fixing block 70 , and an output end of the third servo motor 71 is connected to a controlled end of the bearing mechanism via a third synchronous pulley assembly 72 .

[0058] The bearing mechanism includes a plurality of rotating shafts 73, rollers 64, tensioning strips 66 and cam bearing followers 74. In this embodiment, a total of five rotating shafts are provided.

[0059] The rotating shaft 73 is set on the inner wall of the roller wall panel 63 through the bearing 67 and is parallel to the rotating base; the five rotating shafts 73 are evenly distributed and arranged in a ring, and a middle rotating shaft 73 is set directly above the third servo motor 71, and the other rotating shafts on both sides of the middle rotating shaft are sleeved with rollers 64 that support the stator core to be detected, and two rollers 64 are arranged at intervals on each rotating shaft.

[0060] The middle rotating shaft and the third servo motor 71 and the two adjacent rotating shafts are connected by the third synchronous pulley assembly 72. The third synchronous pulley assembly 72 between the middle rotating shaft and the third servo motor 71 is located at the end of the middle rotating shaft, and the third synchronous pulley assembly 72 between the two adjacent rotating shafts is located on the rotating shaft between the two rollers. The roller 64 and the synchronous pulley of the third synchronous pulley assembly are fixed to the rotating shaft 73 by a set screw, as shown in FIG. Figure 5 shown.

[0061] In the present invention, the arrangement of four groups of rollers is mathematically deduced, three of which are used for three-point centering to determine the center reference, and one group of rollers plays an auxiliary centering role to solve the problem of workpiece jolting when the motor stator rotates on the workpiece rotating table.

[0062] In this embodiment, four opening support columns and four tensioning strips are provided, which are respectively located below the rotating shaft and the roller, and are mounted on the roller wall panel 63 by bolts.

[0063] The cam bearing follower 74 is fixed to the tensioning strip 66 by a nut. The cam bearing follower 74 is provided with a free-rolling cylinder to support the synchronous belt in the synchronous pulley assembly 72. The tension of the synchronous belt is adjusted by moving the tensioning strip 66 up and down.

[0064] The PLC control system is the core control part of the present invention, including a control box 9, a PC 82, a PLC controller 80, a switch 79, a first servo driver 75, a second servo driver 76, a third servo driver 77, a stepper driver 81 and a communication module 78.

[0065] The control box 9 is installed on the side of the workbench panel 3 and connected to the input end of the PLC controller. The PC includes a PC host 7 and a display screen 1 connected by a data cable; the PC host 7 is arranged on the right side below the profile base, and the display screen 1 is installed on the workbench panel 3 through a bracket. An electric control cabinet 5 is arranged under the profile base on the left side of the PC host 7, and a PLC controller 80, a switch 79, a first servo driver 75, a second servo driver 76, a third servo driver 77, a stepper driver 81, and a communication module 78 are placed in the electric control cabinet. Figure 1 shown.

[0066] The electrical connection relationship of the above components is as follows Figure 7 As shown, the PC 82 and the switch 79 are connected to the PLC controller 80 via a network cable; the first servo driver, the second servo driver, the third servo driver, and the communication module are connected to the switch via a network cable, and the input end of the communication module is connected to the output end of the ranging sensor; the stepper driver is directly connected to the PLC controller 80; the input end of the PLC controller is also connected to the output ends of the first limit sensor group, the second limit sensor group, and the photoelectric sensor; the output end of the camera is connected to the PC 82 via a network cable.

[0067] A method for detecting the continuity of oil holes in a motor stator core is implemented based on the above-mentioned device for detecting the continuity of oil holes in a motor stator core, and specifically comprises the following steps.

[0068] First, after the stator core to be inspected is grabbed onto the workpiece rotating table and scanned successfully, press the start button on the control box. The PLC controller controls the rotating mechanism to rotate 90º clockwise to the inspection station. Then, the supporting mechanism on the workpiece rotating table is controlled to drive the stator core to rotate 240º axially. The PLC controller reads multiple feedback values ​​of the distance measuring sensor through the communication module and calculates the average.

[0069] Secondly, according to the mean value calculated by the PLC controller, the PLC controller controls the first sliding plate of the light source sliding mechanism and the second sliding plate of the camera sliding mechanism to move on their respective linear guide rails, driving the parallel light source and the camera lens to move to the photo-taking station; at this time, the parallel light source is started to emit light, and the camera captures the light beam passing through the oil hole of the stator core to be inspected, and takes a photo.

[0070] Then, after the camera takes a photo, it compares the location of the oil hole with the standard position and feeds it back to the PLC controller to calculate the angle correction value. The PLC controller controls the workpiece rotating table to return the stator core to the standard position to solve the distribution deviation problem of each hole type; then the stator core is placed on the workpiece rotating table, and the stator core is controlled to rotate axially in 20° steps. The camera takes a photo every time it rotates until the stator core completes a rotation.

[0071] Finally, the PLC controller controls the light source sliding mechanism and the camera sliding mechanism to return to the origin, and the rotating mechanism rotates 90° counterclockwise to the unloading station. The PC host reflects the penetration status of the oil hole on the display screen 1 and saves it in a log file.

Claims

1. A detection method based on a motor stator core oil hole penetration detection device, wherein the detection device is characterized in that: it comprises a workbench panel (3) fixed to a profile base (4) by bolts, a workpiece rotating table (11) is arranged in the middle of the workbench panel (3), and a light source sliding mechanism (12) and a camera sliding mechanism (10) are arranged on the workbench panel (3) on both sides of the workpiece rotating table (11) in a relative manner; a rotating mechanism (8) for driving the workpiece rotating table (11) to rotate horizontally is also arranged on the bottom end surface of the workbench panel (3); the workpiece rotating table (11), the rotating mechanism (8), the light source sliding mechanism (12) and the camera sliding mechanism (10) are all controlled and coordinated by a PLC control system to complete the stator core oil hole penetration detection work; The workpiece rotating platform (11) comprises a rotating base, a roller wall plate (63) perpendicular to the rotating base is fixedly arranged on one side of the top surface of the rotating base, a bearing mechanism for placing the stator core to be tested is arranged on the inner side wall of the roller wall plate (63) above the rotating base, and a third servo motor (71) is fixedly arranged on the rotating base via a motor fixing block (70), and the output end of the third servo motor (71) is connected to the controlled end of the bearing mechanism via a third synchronous pulley assembly (72); The bearing mechanism comprises a plurality of rotating shafts (73) arranged on the inner side wall of the roller wall plate (63) via bearings and parallel to the rotating base, the plurality of rotating shafts (73) being evenly distributed and arranged in a ring shape, a rotating shaft (73) being arranged directly above the third servo motor (71), rollers (64) supporting the stator core to be detected being sleeved on the other rotating shafts on both sides of the middle rotating shaft, and the middle rotating shaft and the third servo motor (71) as well as two adjacent rotating shafts being connected via a third synchronous pulley assembly (72); The PLC control system comprises a PC (82), a PLC controller (80), a switch (79), a first servo drive (75), a second servo drive (76), a third servo drive (77), a stepper drive (81), and a communication module (78); the PC (82) and the switch (79) are connected to the PLC controller (80) via a network cable; the first servo drive, the second servo drive, the third servo drive, and the communication module are connected to the switch via a network cable, and the stepper drive is directly connected to the PLC controller (80); The light source sliding mechanism and the camera sliding mechanism are both provided with a limit sensor group, the rotating mechanism is provided with a photoelectric sensor, and the limit sensor group and the photoelectric sensor are respectively connected to the PLC controller through wires; the camera sliding mechanism is also provided with a distance sensor connected to the communication module through a cable; The detection method specifically comprises the following steps: First, after the stator core to be inspected is grabbed onto the workpiece rotating table and scanned successfully, the PLC controller controls the rotating mechanism to rotate 90º clockwise to the inspection station, and then controls the bearing mechanism on the workpiece rotating table to drive the stator core to rotate 240º axially. The PLC controller reads multiple feedback values ​​of the distance measuring sensor through the communication module to calculate the average value; Secondly, according to the average value calculated by the PLC controller, the PLC controller controls the first sliding plate of the light source sliding mechanism and the second sliding plate of the camera sliding mechanism to move on their respective linear guide rails, driving the light source and the camera lens to move to the photographing station; Then, after the camera takes a photo, it compares the location of the oil hole with the standard position and feeds it back to the PLC controller to calculate the angle correction value; the PLC controller controls the workpiece rotating table to make the stator core under inspection return to the standard position to solve the distribution deviation problem of each hole type; after that, the camera takes a photo every time the stator core rotates 20° in the axial direction until the stator core completes a rotation; Finally, the PLC controller controls the light source sliding mechanism and the camera sliding mechanism to return to the origin, and the rotating mechanism rotates 90º counterclockwise to the unloading station.

2. A detection method based on the motor stator core oil hole penetration detection device according to claim 1, characterized in that: The light source sliding mechanism (12) comprises a first servo motor (21) and a first slide rail mechanism, a first slide plate (15) being arranged on the first slide rail mechanism, the first slide plate (15) and the first servo motor (21) being connected via a first transmission mechanism, and a parallel light source (13) perpendicular to the first slide plate being arranged on the first slide plate (15) via a light source fixing frame (14).

3. The detection method based on the motor stator core oil hole penetration detection device according to claim 1 is characterized in that: The camera sliding mechanism (10) comprises a second servo motor (41) and a second slide rail mechanism, a second sliding plate (33) is arranged on the second slide rail mechanism, the second sliding plate (33) is connected to the output shaft of the second servo motor (41) via a second transmission mechanism, a telecentric lens (31) is fixedly arranged on the second sliding plate (33) via a V-shaped frame (32), and a camera (47) is also fixedly arranged on the second sliding plate (33) located behind the telecentric lens via a support assembly.

4. The detection method based on the motor stator core oil hole penetration detection device according to claim 1 is characterized in that: The rotating mechanism (8) comprises a pair of divider support plates (48) fixedly mounted on the bottom end surface of the workbench panel (3), the bottom ends of the two divider support plates (48) being fixedly connected via a divider fixing plate (54); a stepper motor (49) is arranged on the divider fixing plate (54) via a stepper motor fixing plate (51); a cam divider (57) is fixedly arranged on the divider fixing plate (54) on one side of the stepper motor (49), the input end of the cam divider (57) is connected to the stepper motor (49) via a fourth synchronous pulley assembly (53); and a cam (61) is connected to the side of the cam divider (57) opposite to the fourth synchronous pulley assembly (53) via a third rotating shaft (62) of the cam divider.

5. The detection method based on the motor stator core oil hole penetration detection device according to claim 4 is characterized in that: A cam divider second rotating shaft (58) is provided at the top end of the cam divider, and a rotating base is fixedly arranged on the cam divider second rotating shaft (58).

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