Full-automatic finished bearing bore eddy current testing machine
By using technical means such as electric telescopic rods, connecting columns and rubber suction cups in bearing detection equipment, the problem of low detection accuracy of existing equipment is solved, high accuracy and automation of vortex current detection in bearing holes is achieved, and the quality of finished products is improved .
Patent Information
- Application Number
- CN202411300510.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2024-12-17
AI Technical Summary
During the flaw detection process of existing bearing detection equipment, the surrounding conductor structure affects the eddy current magnetic field, resulting in low detection accuracy and prone to misjudgment, resulting in unstable quality of the finished product and reduced practicality.
Adopt a fully automatic finished bearing inner bore vortex current detector. By setting up an electric telescopic rod, connecting column and rubber suction cup, the bearing workpiece is ensured to be stable inside the AC coil, avoid external metal materials interference to the maximum extent, and improve automation through the central pad and bracket. degree and work efficiency.
It effectively improves the accuracy of AC coils to detect the bearing workpieces, improves the degree of automation and work efficiency of the equipment, and ensures the accuracy and stability of the inspection.
Smart Images
Figure CN119147626A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of automatic detection of inner holes of bearings, and in particular to a fully automatic eddy current detection machine for inner holes of finished bearings. Background Art
[0002] Bearing inspection is an operation to detect defects and material deformation on the bearing surface. The principle of eddy current inspection is to bring a conductor close to a coil with alternating current, and the coil will establish an alternating magnetic field. The alternating magnetic field passes through the conductor and has electromagnetic induction with it, establishing eddy currents in the conductor. The eddy currents in the conductor will also generate their own magnetic fields. The effect of the eddy current magnetic field will also change the strength of the original magnetic field, which will lead to changes in the coil voltage and impedance. Therefore, when defects appear on the surface or near the surface of the conductor or the measured metal material changes, it will affect the intensity and distribution of the eddy current. The change of eddy current will cause the change of the voltage and impedance of the detection coil. According to this change, it is possible to indirectly know the existence of defects in the conductor and whether the performance of the metal material has changed.
[0003] However, during the flaw detection process of bearings, the existing bearing detection equipment has an impact on the eddy current magnetic field due to the surrounding conductor structure, resulting in low accuracy of the magnetic field flaw detection of the bearings. At the same time, it is prone to misjudgment, resulting in a large number of bearing parts. After testing, there are still some unstable factors in the quality of the finished products, which in turn reduces the practicability of the equipment, so it needs to be improved. Summary of the invention
[0004] In order to improve the accuracy of AC coil flaw detection on bearing workpieces, the present application provides a fully automatic eddy current testing machine for the inner hole of a finished bearing.
[0005] The present application provides a fully automatic finished bearing inner hole eddy current testing machine adopts the following technical solution: by setting an electric telescopic rod, a connecting column and a rubber suction cup, and utilizing the mutual cooperation of the electric telescopic rod, the operator adsorbs and fixes the bearing workpiece through the rubber suction cups installed on both sides of the bracket, thereby achieving the purpose of stabilizing the bearing workpiece, and at the same time, starts the electric telescopic rod to extend, and drives the bracket and the rubber suction cup as a whole to move toward the inside of the AC coil through the electric telescopic rod, until the entire bearing workpiece on the side of the rubber suction cup is placed inside the AC coil, and at the same time ensures that the electric telescopic rod is located at the periphery of the top of the AC coil, so that the bearing workpiece can be normally inspected through the AC coil, and the rubber suction cup and the bracket and fixed plate of non-ferromagnetic materials are used for inspection. The bearing workpiece is moved and taken out, thereby minimizing the interference of metal materials in the external environment on the AC coil, thereby effectively improving the accuracy of the AC coil's flaw detection work on the bearing workpiece. At the same time, by setting a central pad and a bracket, the central pad is used to fit and support the entire bearing after moving, which can ensure the influence of the ferromagnetic material below on the bearing workpiece as a whole. At the same time, it is convenient for the electric telescopic rod to be effectively positioned, so that after driving the bearing to move to the top of the central pad and generating resistance, it can reach the required moving range, thereby completing the moving and conveying of the bearing, further improving the overall automation and work efficiency of the equipment, and improving the degree of coordination between the overall equipment and the internal structures to solve the problems raised in the above background technology.
[0006] A fully automatic finished bearing inner hole eddy current testing machine comprises an equipment body, an inspection window is arranged on the side end of the equipment body, a three-color lamp is electrically connected to the top of the equipment body, foot pads are arranged at the four corners of the bottom end of the equipment body, a accommodating window is detachably installed on the side end of the equipment body, a fixed pallet is placed inside the equipment body, a supporting side frame is fixedly installed on the top end of the fixed pallet; an electric telescopic rod is fixedly installed on the bottom end of the supporting side frame, a pair of symmetrically distributed control boards are fixedly installed on the top end of the fixed pallet and on the inner side of the supporting side frame, an AC coil is placed at the center position of the fixed pallet, a central pad is fixedly connected to the top end of the fixed pallet and directly below the AC coil, contact point ends are fixedly installed on the left and right ends of the AC coil, and a connecting column is fixedly sleeved on the bottom end of the electric telescopic rod.
[0007] By adopting the above technical solution and utilizing the function of the connecting column, it is ensured that a certain distance is always maintained between the electric telescopic rod and the AC coil, thereby ensuring that the ferromagnetic material inside the electric telescopic rod affects the eddy current magnetic field formed by the AC coil, further ensuring the normal operation of the equipment in the bearing workpiece detection work and improving the detection effect of the equipment.
[0008] Optionally, a fixing plate is fixedly connected to the bottom end of the connecting column, and reinforcing ribs are evenly spaced and circumferentially arranged at the top end of the fixing plate and on the side of the connecting column.
[0009] By adopting the above technical solution and utilizing the reinforcing ribs equidistantly arranged at the top of the fixing plate, it is possible to ensure a high degree of firmness between the fixing plate and the connecting column, thereby improving the fixing strength between the structures.
[0010] Optionally, a bracket is embedded and installed on the side of the fixed plate, a side circular hole is opened on the side of the bracket, and an inner wall surface of the side circular hole is evenly coated with a layer of lubricating grease.
[0011] By adopting the above technical solution, a layer of lubricating grease is evenly coated on the inner wall surface of the circular hole on the side surface, so that the friction between the fixed shaft and the fixed shaft is low, thereby improving the working life of the structure.
[0012] Optionally, a fixed shaft is fixedly sleeved inside the circular hole on the side surface, and a rubber suction cup is inlaid and installed on the side surface of the fixed shaft, with the opening end of the rubber suction cup facing the inner side of the bracket.
[0013] By adopting the above technical solution, the rubber suction cup can effectively adsorb and fix the entire bearing and facilitate the subsequent bearing removal process.
[0014] Optionally, a bearing workpiece is sucked and attached to a side surface of the rubber suction cup, and a shape of a side of the rubber suction cup close to the bearing workpiece is matched with a surface curvature of the bearing workpiece.
[0015] By adopting the above technical solution, the shape of one side of the rubber suction cup is adapted to the surface curvature of the bearing workpiece, so that the adhesion effect between the two is higher. At the same time, after the adhesion is completed, the rubber suction cup as a whole is not prone to air intake problems.
[0016] Optionally, the diameter of the rubber suction cup is smaller than the thickness of the bearing workpiece, and the inner wall surface of the rubber suction cup is smooth.
[0017] By adopting the above technical solution, the diameter of the rubber suction cup is smaller than the thickness of the bearing workpiece, so that when the side of the bearing workpiece is adsorbed, the side area of the bearing workpiece is guaranteed to be sufficient for the rubber suction cup to adsorb, thereby giving full play to its strong adsorption working effect and improving the overall adsorption quality of the rubber suction cup.
[0018] Optionally, the center of the connecting column and the center of the AC coil are maintained on the same central axis, and the sum of the lengths of the connecting column and the bracket is greater than the thickness of the bearing workpiece.
[0019] By adopting the above technical solution, the total length of the connecting column and the bracket is greater than the thickness of the bearing workpiece, which ensures that there is sufficient space margin between the electric telescopic rod and the AC coil when the electric telescopic rod moves, thereby minimizing the interference of the electric telescopic rod on the AC coil.
[0020] Optionally, two ends of the AC coil are electrically connected to the inside of the AC coil via contact point ends, and the bottom end of the AC coil is in contact with the top end of the fixed support plate.
[0021] By adopting the above technical solution, the bottom end of the AC coil and the top end of the fixed support plate are in close contact with each other, which ensures that the AC coil is always in a stable state during the passage, thereby effectively improving the stability of the AC coil in the bearing workpiece detection process and the accuracy during operation.
[0022] Optionally, the central pad is generally made of non-magnetic material, and the diameter of the central pad is greater than the diameter of the bearing workpiece, and the diameter of the central pad is smaller than the diameter range of the AC coil.
[0023] By adopting the above technical solution, the diameter of the central pad is larger than the diameter of the bearing workpiece, so that the bearing workpiece can be effectively lifted as a whole, thereby facilitating the AC coil to continuously detect the surface of the bearing workpiece and ensuring the stability of the bearing workpiece during detection.
[0024] Optionally, a mounting base is fixed to the bottom end of the supporting side frame, and an embedding inner hole adapted to the electric telescopic rod is provided inside the mounting base, and a transition fit is adopted between the embedding inner hole and the electric telescopic rod.
[0025] By adopting the above technical solution, the embedded inner hole and the electric telescopic rod are matched with each other, so that the stability of the two during the assembly process is better, thereby ensuring a high degree of matching between the embedded inner hole and the electric telescopic rod.
[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention sets an electric telescopic rod, a connecting column and a rubber suction cup, and utilizes the mutual cooperation of the electric telescopic rod, so that the operator adsorbs and fixes the bearing workpiece through the rubber suction cups installed on both sides of the bracket, thereby achieving the purpose of stabilizing the bearing workpiece, and at the same time starts the electric telescopic rod to extend, and drives the bracket and the rubber suction cup to move toward the inner side of the AC coil through the electric telescopic rod, until the entire bearing workpiece on the side of the rubber suction cup is placed inside the AC coil, and at the same time ensures that the electric telescopic rod is located at the outer periphery of the top of the AC coil, so that the AC coil can be used to normally detect the bearing workpiece, and the rubber suction cup and the bracket and fixing plate of the non-ferromagnetic material are used to move and remove the bearing workpiece, thereby maximally avoiding the interference of metal substances in the external environment on the AC coil, thereby effectively improving the accuracy of the AC coil in flaw detection of the bearing workpiece; 2. The present invention provides a central pad and a bracket, and utilizes the central pad to provide fitting support for the entire bearing after it is moved, thereby ensuring the influence of the ferromagnetic material below on the entire bearing workpiece, and facilitating effective positioning of the electric telescopic rod, so that after driving the bearing to move to the top of the central pad and generating resistance, the desired moving range can be reached, thereby completing the moving and conveying of the bearing, further improving the overall automation level and work efficiency of the equipment, and improving the degree of coordination between the various structures of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of the overall structure of the eddy current testing machine of Example 1 of the present application; Figure 2 This is a schematic diagram of the overall structure of the fixed support plate of Example 2 of the present application; Figure 3 This is a schematic diagram of the three-dimensional assembly structure of Example 2 of the present application; Figure 4 This is a schematic diagram of the partial structure of Example 2 of the present application; Figure 5 This is a schematic diagram of the overall structure of the supporting side frame of Example 2 of the present application; Figure 6 This is a schematic diagram of the overall structure of the side surface of Example 2 of the present application; Figure 7 This is a schematic diagram of the working of the AC coil and bearing of application embodiment 2.
[0028] Explanation of the accompanying drawings: 1. Equipment body; 2. Inspection window; 3. Three-color light; 4. Foot pad; 5. Accommodation window; 6. Fixed pallet; 7. Support side frame; 8. Electric telescopic rod; 9. Control board; 10. AC coil; 11. Central pad; 12. Contact point end; 13. Connecting column; 14. Fixed plate; 15. Reinforcement rib; 16. Bracket; 17. Side round hole; 18. Rubber suction cup; 19. Fixed shaft; 20. Bearing workpiece. DETAILED DESCRIPTION
[0029] The following is combined with Figure 1-7 This application is described in further detail.
[0030] The embodiment of the present application discloses a fully automatic eddy current testing machine for the inner hole of a finished bearing.
[0031] Example 1 Reference Figure 1 A fully automatic finished bearing inner hole eddy current testing machine comprises an equipment body 1, an inspection window 2 is arranged at the side end of the equipment body 1, a three-color lamp 3 is electrically connected to the top of the equipment body 1, foot pads 4 are arranged at the four corners of the bottom end of the equipment body 1, a receiving window 5 is detachably installed at the side end of the equipment body 1, a fixed support plate 6 is placed inside the equipment body 1, and a supporting side frame 7 is fixedly installed at the top of the fixed support plate 6; An electric telescopic rod 8 is fixedly installed on the bottom end of the supporting side frame 7, a pair of symmetrically distributed control boards 9 are fixedly installed on the top end of the fixed support plate 6 and located on the inner side of the supporting side frame 7, an AC coil 10 is placed at the center position of the fixed support plate 6, a central pad 11 is fixedly connected to the top end of the fixed support plate 6 and located directly below the AC coil 10, contact point ends 12 are fixedly installed on the left and right ends of the AC coil 10, and a connecting column 13 is fixedly sleeved on the bottom end of the electric telescopic rod 8.
[0032] The implementation principle of Example 1 is as follows: first, the conductor to be tested is brought close to the coil through which alternating current is passed, and then the conductor is fixed to the end of the electric telescopic rod 8 as a whole by a clamp, and completely enters the interior of the coil as the electric telescopic rod 8 moves. After the entry is completed, the electric telescopic rod 8 stops moving and stabilizes the conductor. At the same time, the connecting column 13 plays a connecting role to ensure that the electric telescopic rod 8 above the conductor is always located outside the magnetic field of the coil. At the same time, the contact point end 12 establishes a connection between the control board 9 and the AC coil 10, and connects the electrical signal. At this time, an alternating magnetic field is established by the coil, and the alternating magnetic field passes through the conductor and generates electromagnetic induction with it, establishing eddy currents in the conductor. The eddy currents in the conductor will also generate their own magnetic fields. The effect of the eddy current magnetic field will also change the strength of the original magnetic field, thereby causing The change of coil voltage and impedance, therefore, when defects appear on the surface or near the surface of the conductor or the measured metal material changes, it will affect the intensity and distribution of the eddy current. The change of eddy current causes the change of the detection coil voltage and impedance. According to this change, the existence of defects in the conductor and whether the performance of the metal material has changed can be indirectly known, and the detection data can be recorded in real time and backed up at the same time. After the detection is completed, the electric telescopic rod 8 is contracted in the opposite direction, thereby driving the conductor out of the magnetic field, and then the clamp is loosened, and the conductor (bearing) that has been tested is taken out. At this point, the detection work is completed, and the bearings are sorted and distinguished into qualified products and defective products through the detection data of each item, so as to complete the subsequent packaging and delivery work, and complete the flaw detection and overall integrity detection workflow of the bearing.
[0033] Example 2 Reference Figure 2-7A fully automatic finished bearing inner hole eddy current testing machine includes a connecting column 13, the bottom end of the connecting column 13 is fixedly connected to a fixing plate 14, the top of the fixing plate 14 and the side of the connecting column 13 are evenly spaced and arranged with reinforcing ribs 15, the side of the fixing plate 14 is embedded with a bracket 16, the side of the bracket 16 is provided with a side circular hole 17, the inner wall surface of the side circular hole 17 is evenly coated with a layer of lubricating grease, the inner fixed sleeve of the side circular hole 17 is provided with a fixing shaft 19, the side of the fixing shaft 19 is inlaid with a rubber suction cup 18, the open end of the rubber suction cup 18 faces the inner side of the bracket 16, the side of the rubber suction cup 18 is sucked and attached with a bearing workpiece 20, the shape of the side of the rubber suction cup 18 close to the bearing workpiece 20 is adapted to the surface curvature of the bearing workpiece 20, and the two ends of the AC coil 10 are connected through the contact point end 12 It is electrically connected to the inside of the AC coil 10, the bottom end of the AC coil 10 is in contact with the top end of the fixed support plate 6, the center of the connecting column 13 and the center of the AC coil 10 are maintained on the same central axis, and the sum of the length values of the connecting column 13 and the bracket 16 is greater than the thickness value of the bearing workpiece 20, the central pad 11 is generally a non-magnetic material component, and the diameter value of the central pad 11 is greater than the diameter value of the bearing workpiece 20, and the diameter value of the central pad 11 is less than the diameter value range of the AC coil 10, and a mounting base is fixed to the bottom end of the supporting side frame 7, and an embedded inner hole compatible with the electric telescopic rod 8 is opened inside the mounting base, and a transition fit is adopted between the embedded inner hole and the electric telescopic rod 8, and the surface of the electric telescopic rod 8 is smooth, the diameter value of the rubber suction cup 18 is less than the thickness value of the bearing workpiece 20, and the inner wall surface of the rubber suction cup 18 is smooth.
[0034] The implementation principle of Example 2 is as follows: the operator fixes the bearing workpiece 20 by adsorbing it through the rubber suction cups 18 installed on both sides of the bracket 16, so as to achieve the purpose of stabilizing the bearing workpiece 20. At the same time, the electric telescopic rod 8 is started to extend, and the bracket 16 and the rubber suction cup 18 are driven by the electric telescopic rod 8 to move toward the inner side of the AC coil 10 as a whole, until the entire bearing workpiece 20 on the side of the rubber suction cup 18 is placed inside the AC coil 10, and at the same time, the electric telescopic rod 8 is ensured to be located at the outer periphery of the top of the AC coil 10, so that the bearing workpiece 20 can be normally detected through the AC coil 10, and the bearing workpiece 20 can be moved and removed through the rubber suction cup 18 and the bracket 16 and the fixed plate 14 made of non-ferromagnetic materials, so as to minimize the interference of metal substances in the external environment with the AC coil 10, thereby effectively improving the accuracy and work quality of the AC coil 10 for flaw detection of the bearing workpiece 20.
[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A fully automatic finished bearing inner hole eddy current testing machine, characterized by: The device comprises a device body (1), a side end of the device body (1) is provided with an inspection window (2), the top end of the device body (1) is electrically connected to a three-color light (3), foot pads (4) are provided at the four corners of the bottom end of the device body (1), and a detachable accommodation window (5) is installed on the side end of the device body (1), and the device body (1) is characterized in that: a fixed support plate (6) is placed inside the device body (1), a support side frame (7) is fixedly installed on the top end of the fixed support plate (6); and a support side frame (7) is fixedly installed on the bottom end of the support side frame (7). An electric telescopic rod (8) is provided. A pair of symmetrically distributed control panels (9) are fixedly installed at the top of the fixed support plate (6) and located on the inner side of the supporting side frame (7). An AC coil (10) is placed at the center of the fixed support plate (6). A central pad (11) is fixedly connected to the top of the fixed support plate (6) and located directly below the AC coil (10). Contact point ends (12) are fixedly installed at the left and right ends of the AC coil (10). A connecting column (13) is fixedly sleeved on the bottom end of the electric telescopic rod (8).
2. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 1, characterized in that: The bottom end of the connecting column (13) is fixedly connected to a fixing plate (14), and reinforcing ribs (15) are arranged at equal intervals in the circumferential direction at the top end of the fixing plate (14) and on the side of the connecting column (13).
3. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 2, characterized in that: A bracket (16) is embedded and installed on the side of the fixing plate (14), a side circular hole (17) is opened on the side of the bracket (16), and the inner wall surface of the side circular hole (17) is evenly coated with a layer of lubricating grease.
4. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 3, characterized in that: A fixed shaft (19) is fixedly sleeved inside the side circular hole (17), and a rubber suction cup (18) is inlaid and installed on the side of the fixed shaft (19), with the open end of the rubber suction cup (18) facing the inner side of the bracket (16).
5. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 4, characterized in that: The side surface of the rubber suction cup (18) is sucked and attached with the bearing workpiece (20), and the shape of the side of the fixed shaft (19) close to the bearing workpiece (20) is mutually adapted to the surface curvature of the bearing workpiece (20).
6. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 5, characterized in that: The diameter of the rubber suction cup (18) is smaller than the thickness of the bearing workpiece (20), and the inner wall surface of the rubber suction cup (18) is smooth.
7. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 3, characterized in that: The center of the connection column (13) and the center of the AC coil (10) are maintained on the same central axis, and the sum of the lengths of the connection column (13) and the bracket (16) is greater than the thickness of the bearing workpiece (20).
8. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 1, characterized in that: The two ends of the AC coil (10) are electrically connected to the interior of the AC coil (10) via contact point ends (12), and the bottom end of the AC coil (10) is in contact with the top end of the fixed support plate (6).
9. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 1, characterized in that: The central pad (11) is generally a non-magnetic material component, and the diameter value of the central pad (11) is greater than the diameter value of the bearing workpiece (20), and the diameter value of the central pad (11) is less than the diameter value range of the AC coil (10).
10. The fully automatic eddy current testing machine for inner hole of finished bearing according to claim 1, characterized in that: A mounting base is fixed to the bottom end of the supporting side frame (7), and an embedding inner hole matching the electric telescopic rod (8) is provided inside the mounting base, and a transition fit is adopted between the embedding inner hole and the electric telescopic rod (8).