Magnetic induction defect eddy current detection device for aluminum alloy forging part and detection method of magnetic induction defect eddy current detection device

Abstract

The invention relates to the field of magnetic sensor detection, in particular to a magnetic induction aluminum alloy forging part defect eddy current detection device and a detection method thereof.The magnetic induction aluminum alloy forging part defect eddy current detection device comprises a detection cabinet and a free rotary table arranged on the detection cabinet and used for bearing a to-be-detected workpiece; the first transmission line and the second transmission line are respectively arranged on two sides of the detection cabinet; the workpiece transfer mechanism is arranged on the detection cabinet; the rotating speed of the cylindrical driving wheel and the workpiece can be changed by triggering a probe movably arranged on the cylindrical detection cabinet through the assembling mechanism and a speed regulating mechanism connected with the assembling mechanism; by arranging the speed regulating mechanism, the speed regulating mechanism can be triggered whenever the probe arrives at the position of the circular truncated cone on the workpiece in the ascending process of the probe, so that the rotating speed of the speed regulating motor can be correspondingly adjusted according to the diameter of the circular truncated cone to be detected by the probe, and the circular truncated cones with different diameters are automatically matched with proper rotating speeds when being detected; the accuracy and the reliability of the eddy current detection system based on the magnetic sensor are effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of magnetic sensor detection, and in particular to a magnetic induction aluminum alloy forging piece defect eddy current detection device and a detection method thereof. BACKGROUND

[0002] Aluminum alloy forging pieces are widely used in some fields due to their lightweight and high-strength characteristics. During the forming process, defects such as cracks and inclusions may occur. In production, the aluminum alloy forging pieces need to be detected. Traditional methods often use electromagnetic induction principles and utilize the core eddy current probe of a magnetic sensor to scan the surface of the workpiece. An alternating magnetic field induces eddy currents in conductive materials, and defects disturb the eddy current field. The magnetic sensor identifies defects through impedance changes. The probe scans and collects signals to construct a defect map.

[0003] For rotary aluminum alloy forging pieces, the conventional detection process drives them to rotate at a constant speed, and the eddy current probe translates along the axial direction at a fixed distance. However, some actual workpieces are not uniform-diameter cylinders (functional design), and their axial direction often presents a stepped variable-diameter structure composed of multiple circular truncated cones. To ensure sensitivity, the probe also needs to be adjusted in the radial direction of the workpiece to maintain a constant lift-off distance from the detection surface.

[0004] When the magnetic sensor scans the large-diameter circular truncated cone region, under the condition of constant spindle speed, the surface linear velocity at this point is significantly higher than that of the small-diameter section, which may cause the relative motion speed between the magnetic sensor and the detection point to be too large. Fast scanning speed can easily cause the eddy current field at the defect site to not be fully established, and the disturbance information has not been completely generated before it leaves the effective sensing range of the magnetic sensor. The collected signal exhibits dynamic distortion phenomena such as amplitude attenuation, steep front edge, and truncated trailing edge. This can easily lead to underestimation of the defect equivalent size or even missed detection, ultimately making it difficult to effectively guarantee the accuracy and reliability of the eddy current detection system based on the magnetic sensor. SUMMARY

[0005] The present application aims to provide a magnetic induction aluminum alloy forging piece defect eddy current detection device and a detection method thereof to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A magnetic induction aluminum alloy forging piece defect eddy current detection device, comprising a detection cabinet and a free turntable arranged on the detection cabinet for supporting a workpiece to be detected, further comprising:

[0008] The first transmission line and the second transmission line are respectively arranged on the two sides of the detection cabinet, and a workpiece transfer mechanism is arranged on the detection cabinet, the workpiece transfer mechanism is used for simultaneously transferring the workpiece which has completed detection on the free turntable to the second transmission line and transferring the workpiece to be detected on the first transmission line to the free turntable, and the workpiece transfer mechanism is connected with a limiting mechanism arranged on the detection cabinet, the limiting mechanism performs clamping action on the workpiece to be detected on the free turntable after the workpiece transfer is completed;

[0009] A driving wheel is movably arranged on the detection cabinet through a pneumatic mechanism, when the workpiece clamping is completed, the driving wheel can abut against the workpiece and drive the workpiece to rotate;

[0010] The probe is movably arranged on the detection cabinet through the assembly mechanism, in the detection process, the probe ascends, and when the probe reaches the connection position of the workpiece with different diameter circular tables, the probe can move along the radial direction of the workpiece, the speed regulating mechanism connected with the assembly mechanism is triggered, and the rotating speed of the driving wheel and the workpiece can be changed.

[0011] The magnetic induction aluminum alloy forging defect eddy current detection device as described above: the pneumatic mechanism comprises two cylinders rotatably arranged on the side of the detection cabinet, a mounting plate is slidably arranged on the detection cabinet, and the movable ends of the two cylinders are rotatably connected with the mounting plate;

[0012] The driving wheel is rotatably arranged on the bottom of the mounting plate, and a speed regulating motor is further arranged on the mounting plate, and the output end of the speed regulating motor is connected with the rotating shaft of the driving wheel.

[0013] The magnetic induction aluminum alloy forging defect eddy current detection device as described above: the assembly mechanism comprises two vertical plates fixed on the detection cabinet, and further comprises:

[0014] A mounting plate movably arranged on the two vertical plates and connected with the speed regulating mechanism, the mounting plate can be driven by two third linear drive modules respectively arranged on the two vertical plates to perform lifting action;

[0015] Two groups of elastic components arranged on the mounting plate and connected with the probe, the elastic components are matched with the vertical plates, so that the probe can move along the radial direction of the workpiece when the probe reaches the connection position of the workpiece with different diameter circular tables.

[0016] The magnetic induction aluminum alloy forging defect eddy current detection device as described above: the elastic component comprises a mounting arm fixed with the mounting plate and internally hollow, a guide column fixed in the mounting arm, and a sliding block slidably arranged in the mounting arm and slidably connected with the guide column;

[0017] The guide post is fitted with a cylindrical spring on its outer periphery. The two ends of the cylindrical spring are respectively connected to the inner wall of the assembly arm and the slider. The probe is fixedly connected to the slider.

[0018] The magnetic induction defect eddy current detection device for aluminum alloy forgings described above: a cylinder is fixed on the side of the slider facing the vertical plate, the vertical plate is provided with a groove adapted to the cylinder, the cylinder extends into the groove and is slidably connected to the vertical plate, the groove includes a first vertical section and a plurality of L-shaped sections connecting the first vertical section.

[0019] The groove also includes an inclined section connecting the L-shaped section, a second vertical section communicating with the inclined section, and a straight section connecting the second vertical section and the first vertical section. A one-way limiting plate is also rotatably installed on the vertical plate, and the one-way limiting plate is located at the end of the inclined section facing the second vertical section.

[0020] The magnetic induction defect eddy current detection device for aluminum alloy forgings as described above: the speed regulation mechanism includes a speed regulator installed on the detection cabinet, a vertical shaft rotatably installed on the detection cabinet, and a sleeve fixed on the mounting plate and slidably fitted with the vertical shaft. The knob of the speed regulator is fixedly connected to a first gear, and a second gear meshing with the first gear is fixed on the vertical shaft.

[0021] The sleeve is fixed with a drive column, and the vertical shaft is provided with a sliding groove adapted to the drive column. The drive column extends into the sliding groove and is slidably connected to the vertical shaft. The sliding groove includes a first groove arranged along the axial direction of the vertical shaft and a plurality of second grooves arranged in a spiral shape. The plurality of second grooves are connected by a third groove, which is arranged along the axial direction of the vertical shaft.

[0022] The eddy current detection device for defects in aluminum alloy forgings using magnetic induction as described above: the workpiece transfer mechanism includes two lifting plates movably mounted on the detection cabinet, a transverse plate movably mounted between the two lifting plates, and two sets of clamping fixtures mounted on the transverse plate;

[0023] The lifting plate can be driven to rise and fall by a first linear drive module mounted on the testing cabinet, and the transverse plate can be driven to move horizontally by a second linear drive module mounted on the two lifting plates.

[0024] The magnetic induction defect eddy current detection device for aluminum alloy forgings as described above: the limiting mechanism includes four first guide rails fixed on the detection cabinet and equidistantly distributed along the circumference. The first guide rails are inclined and a driven plate is slidably fitted on them. A limiting wheel is provided at one end of the driven plate facing the free turntable.

[0025] Each of the two lifting plates is connected to a set of sliding fit structures. The sliding fit structures connect two driven plates located on the same side of the testing cabinet and can drive the driven plates to slide on the first guide rail.

[0026] The magnetic induction defect eddy current detection device for aluminum alloy forgings as described above: the sliding fit structure includes a second guide rail fixed on the detection cabinet and a transverse seat slidably fitted on the second guide rail. The transverse seat is fixedly connected to a transmission arm located above the driven plate, and the transmission arm is provided with two strip grooves. The driven plate is fixed with a protrusion that passes through the strip grooves and is slidably connected to the transmission arm.

[0027] The transverse seat is also fixed with a transmission plate, which has a through groove. The lifting plate is fixed with a follower column that passes through the through groove and is slidably connected to the transmission plate. The through groove includes a first groove section that is inclined and a second groove section that is vertically arranged and connected to the first groove section.

[0028] A defect detection method for aluminum alloy forgings, employing the magnetic induction eddy current detection device for defects in aluminum alloy forgings as described in any one of the above-mentioned methods, includes the following steps:

[0029] Step 1: The workpiece transfer mechanism transfers the workpiece to be inspected from the first transmission line to the free turntable;

[0030] Step two: The drive wheel comes into contact with the workpiece, causing the workpiece to rotate;

[0031] Step 3: The assembly mechanism drives the probe to rise. When the probe reaches the height of each frustum on the workpiece, it moves radially along the workpiece. The speed regulation mechanism is triggered before the probe reaches the position of the frustum on the workpiece, so that the speed of the speed regulation motor is adjusted according to the diameter of the frustum to be detected by the probe, so that frustums of different diameters are automatically matched with appropriate speeds when being detected.

[0032] Step four: After the inspection is completed, the workpiece transfer mechanism simultaneously transfers the workpiece that has been inspected on the free turntable to the second transmission line and transfers the workpiece to be inspected on the first transmission line to the free turntable.

[0033] Step 5: Based on the test results, classify the workpieces on the second transmission line.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] This invention, by setting up an assembly mechanism, drives the probe to rise during the detection process. During this process, through the cooperation of the cylinder and the vertical plate, the probe can move radially along the workpiece when it reaches the height of each frustum on the workpiece, ensuring that the probe always maintains a constant lifting distance from the detection surface to ensure sensitivity.

[0036] Secondly, by setting up a speed regulation mechanism, during the probe's ascent, the mechanism is triggered before the probe reaches the frustum position on the workpiece. This allows the speed of the speed regulation motor to be adjusted according to the diameter of the frustum to be detected. This ensures that frustums of different diameters automatically match the appropriate speed during detection. While maintaining detection efficiency, this avoids situations where, when the probe scans a large-diameter frustum area, the surface linear velocity is significantly higher than that of a small-diameter section due to the constant workpiece speed. This prevents excessive relative speed between the probe and the detection point, which could lead to a series of problems caused by excessively fast scanning speeds. It also ensures the full establishment of the eddy current field at the defect location, preventing disturbance information from leaving the effective sensing range of the magnetic sensor before it is fully generated, and avoiding dynamic distortion phenomena such as amplitude attenuation, steep leading edges, and truncated trailing edges in the acquired signal. This effectively guarantees the accuracy and reliability of the eddy current detection system based on the magnetic sensor. Attached Figure Description

[0037] Figure 1 An isometric view of one embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0038] Figure 2 This is a schematic diagram of one embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0039] Figure 3 This is a schematic diagram of another aspect of an embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0040] Figure 4 This is a schematic diagram of another aspect of an embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0041] Figure 5 This is a schematic diagram of the structure of the inspection cabinet in one embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0042] Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle.

[0043] Figure 7 This is a schematic diagram of the workpiece transfer mechanism in one embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0044] Figure 8 This is a schematic diagram of the workpiece transfer mechanism from another angle in one embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0045] Figure 9This is a schematic diagram of the assembly mechanism in one embodiment of a magnetic induction-based eddy current detection device for defects in aluminum alloy forgings.

[0046] Figure 10 An exploded view of the assembly mechanism in one embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0047] Figure 11 This is a schematic diagram of the vertical plate in one embodiment of a magnetic induction-based eddy current detection device for defects in aluminum alloy forgings.

[0048] Figure 12 This is a schematic diagram of the structure of the vertical plate at another angle in one embodiment of a magnetically induced eddy current detection device for defects in aluminum alloy forgings.

[0049] In the diagram: 1. Testing cabinet; 2. First transmission line; 3. Second transmission line; 4. Turntable; 5. Lifting plate; 501. Follower column; 6. Horizontal movement plate; 7. First linear drive module; 8. Second linear drive module; 9. First guide rail; 10. Driven plate; 1001. Protruding column; 11. Limiting wheel; 12. Second guide rail; 13. Horizontal movement seat; 14. Transmission arm; 1401. Strip groove; 15. Transmission plate; 1501. First groove segment; 1502. Second groove segment; 16. Assembly plate; 17. Cylinder; 18. Speed ​​regulating motor; 19. Drive wheel; 20. Probe; 21. Speed ​​controller; 22. First gear; 23. Vertical shaft; 2301. First groove; 2302. Second groove; 2303. Third groove; 24. Vertical plate; 2401. First vertical section; 2402. L-shaped section; 2403. Inclined section; 2404. Second vertical section; 2405. Straight section; 25. Third linear drive module; 26. Mounting plate; 27. Sleeve; 2701. Drive column; 28. Assembly arm; 29. ​​Guide column; 2901. Columnar spring; 30. Second gear; 31. Slider; 3101. Cylinder; 32. One-way limit plate. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0052] Please see Figures 1-12 In this embodiment, a magnetic induction defect eddy current detection device for aluminum alloy forgings includes a detection cabinet 1 and a free-turning stage 4 mounted on the detection cabinet 1 for supporting the workpiece to be inspected, and further includes:

[0053] The first transmission line 2 and the second transmission line 3 are respectively located on both sides of the inspection cabinet 1, and the workpiece transfer mechanism is located on the inspection cabinet 1. The workpiece transfer mechanism is used to simultaneously transfer the workpiece that has been inspected on the free turntable 4 to the second transmission line 3 and to transfer the workpiece to be inspected on the first transmission line 2 to the free turntable 4. The workpiece transfer mechanism is connected to the limiting mechanism located on the inspection cabinet 1. After the workpiece transfer is completed, the limiting mechanism performs a clamping action on the workpiece to be inspected on the free turntable 4.

[0054] Drive wheel 19, which is mounted on the inspection cabinet 1 by a pneumatic mechanism, can abut against the workpiece and drive the workpiece to rotate after the workpiece is clamped.

[0055] The probe 20, which is mounted on the inspection cabinet 1 via the assembly mechanism, rises during the inspection process. When the probe 20 reaches the connection point of different diameter frustums on the workpiece, it moves radially along the workpiece. The speed regulation mechanism connected to the assembly mechanism is triggered, which can change the rotational speed of the drive wheel 19 and the workpiece.

[0056] In this embodiment, it should be further explained that during actual operation, the robot arm transfers the workpiece to be inspected to the first transmission line 2. The workpiece transfer mechanism can simultaneously transfer the workpiece that has been inspected on the free turntable 4 to the second transmission line 3 and transfer the workpiece to be inspected on the first transmission line 2 to the free turntable 4. Subsequently, the workpiece on the second transmission line 3 will be classified according to the inspection results, thus realizing continuous automatic inspection.

[0057] As a further embodiment of the present invention, please refer again. Figure 4The pneumatic mechanism includes two cylinders 17 rotatably mounted on the side of the testing cabinet 1. An assembly plate 16 is slidably mounted on the testing cabinet 1. The movable ends of the two cylinders 17 are rotatably connected to the assembly plate 16. A drive wheel 19 is rotatably mounted on the bottom of the assembly plate 16. A speed-regulating motor 18 is also mounted on the assembly plate 16. The output end of the speed-regulating motor 18 is connected to the rotation shaft of the drive wheel 19.

[0058] In this embodiment, further, after the workpiece transfer mechanism transfers the workpiece to be inspected onto the free turntable 4, and after the limiting mechanism completes the clamping of the workpiece, the cylinder 17 drives the assembly plate 16 to move the drive wheel 19 toward the workpiece on the inspection cabinet 1 until the drive wheel 19 abuts against the outer wall of the workpiece. Subsequently, during the inspection process, the speed regulating motor 18 drives the drive wheel 19 to rotate, which enables the drive wheel 19 to keep the workpiece rotating, and the probe 20 can scan the surface of the workpiece.

[0059] It should be noted that the speed adjustment mechanism is designed to change the rotational speed of the drive wheel 19 and the workpiece when the probe 20 corresponds to different diameter frustums on the workpiece during the detection process. Specifically, when the probe 20 corresponds to a larger diameter frustum on the workpiece, the speed of the speed adjustment motor 18 is lower than that of a smaller diameter frustum. This ensures that the relative speed between the probe 20 and various parts of the larger diameter frustum surface is reduced, preventing the workpiece from rotating at a constant speed when the probe 20 scans the area of ​​the larger diameter frustum, where the surface linear velocity is significantly higher than that of the smaller diameter section. This would lead to an excessively high relative speed between the probe 20 and the detection point, causing a series of problems due to excessive scanning speed.

[0060] As a further embodiment of the present invention, please refer again. Figure 9 and Figure 10 The assembly mechanism includes two vertical plates 24 fixed on the testing cabinet 1, and also includes a mounting plate 26 movably disposed on the two vertical plates 24 and connected to the speed regulating mechanism. The mounting plate 26 can be driven by two third linear drive modules 25 respectively mounted on the two vertical plates 24 to perform lifting and lowering actions.

[0061] Two sets of elastic components are provided on the mounting plate 26 and connected to the probe 20. The elastic components cooperate with the vertical plate 24 so that the probe 20 can move radially along the workpiece when it reaches the connection of different diameter frustums on the workpiece.

[0062] The elastic component includes an assembly arm 28 fixed to the mounting plate 26 and hollow inside, a guide post 29 fixed inside the assembly arm 28, and a slider 31 slidably disposed inside the assembly arm 28 and slidably connected to the guide post 29; wherein, a cylindrical spring 2901 is sleeved on the outer periphery of the guide post 29, and the two ends of the cylindrical spring 2901 are respectively connected to the inner wall of the assembly arm 28 and the slider 31, and the probe 20 is fixedly connected to the slider 31.

[0063] Please refer to it again. Figure 11 A cylinder 3101 is fixed to the side of the slider 31 facing the vertical plate 24. The vertical plate 24 is provided with a groove adapted to the cylinder 3101. The cylinder 3101 extends into the groove and is slidably connected to the vertical plate 24. The groove includes a first vertical section 2401 and a plurality of L-shaped sections 2402 connecting the first vertical section 2401. The groove also includes an inclined section 2403 connecting the L-shaped sections 2402, a second vertical section 2404 communicating with the inclined section 2403, and a straight section 2405 connecting the second vertical section 2404 and the first vertical section 2401. A one-way limiting piece 32 is also rotatably installed on the vertical plate 24. The one-way limiting piece 32 is located at the end of the inclined section 2403 facing the second vertical section 2404.

[0064] Among them, multiple L-shaped segments 2402 correspond to frustums of different diameters on the workpiece. Specifically, during detection, the third linear drive module 25 drives the mounting plate 26 to raise the probe 20. The cylinder 3101 first moves upward within the first vertical segment 2401. When the probe 20 reaches the position of the frustum on the workpiece, the cylinder 3101 reaches the end of the L-shaped segment 2402. Then, the cylindrical spring 2901 rebounds, causing the cylinder 3101 to switch to the intersection of the L-shaped segments 2402. The slider 31 then drives the probe 20 to move radially along the workpiece, allowing the probe 20 to approach the outer wall of the frustum, ensuring that the probe 20 always maintains a constant lift-off distance from the detection surface to ensure sensitivity.

[0065] In detail, the one-way limiting piece 32 is also connected to a torsion spring;

[0066] In this embodiment, after passing through multiple L-shaped segments 2402, the cylinder 3101 enters the inclined segment 2403. Then, the cylinder 3101 slides against the vertical plate 24 via the inclined segment 2403. This causes the cylinder 3101 to move the slider 31, which slides towards the mounting plate 26 within the assembly arm 28. The cylindrical spring 2901 is then recompressed until the cylinder 3101 causes the one-way limiting piece 32 to deflect towards the second vertical segment 2404. The cylinder 3101 then... The cylinder 3101 enters the second vertical segment 2404 and continues to rise, causing the unidirectional limiting piece 32 to elastically deflect and reset. Then, the third linear drive module 25 drives the mounting plate 26 to move downward, and the cylinder 3101 moves downward along the second vertical segment 2404. When the mounting plate 26 moves downward and resets to the initial height, that is, when the cylinder 3101 reaches the connection between the second vertical segment 2404 and the straight segment 2405, the columnar spring 2901 rebounds, causing the cylinder 3101 to return to the connection between the straight segment 2405 and the first vertical segment 2401.

[0067] As a further embodiment of the present invention, please refer again. Figure 6 and Figure 10 The speed regulating mechanism includes a speed regulator 21 mounted on the testing cabinet 1, a vertical shaft 23 rotatably mounted on the testing cabinet 1, and a sleeve 27 fixed on the mounting plate 26 and slidably fitted with the vertical shaft 23. The knob of the speed regulator 21 is fixedly connected to a first gear 22, and a second gear 30 that meshes with the first gear 22 is fixed on the vertical shaft 23.

[0068] The sleeve 27 is fixed with a drive column 2701, and the vertical shaft 23 is provided with a sliding groove adapted to the drive column 2701. The drive column 2701 extends into the sliding groove and is slidably connected to the vertical shaft 23. The sliding groove includes a first groove 2301 arranged along the axial direction of the vertical shaft 23 and a plurality of second grooves 2302 arranged in a spiral shape. The plurality of second grooves 2302 are connected by a third groove 2303, which is arranged along the axial direction of the vertical shaft 23.

[0069] It should be noted that the speed controller 21 is an application of existing technology. It is the core execution component for the speed-regulating motor 18 to realize the speed change function. It changes the output speed by adjusting the motor input parameters (voltage / frequency / excitation, etc.). This application will not elaborate on this further.

[0070] In this embodiment, during the detection process, the mounting plate 26 moves the sleeve 27 upward together. Before the probe 20 reaches the frustum position on the workpiece, the drive column 2701 passes through the second groove 2302. Since the second groove 2302 is spirally arranged, when the drive column 2701 passes through the second groove 2302, it will cause the vertical shaft 23 to rotate. Correspondingly, the vertical shaft 23 drives the knob of the speed regulator 21 to rotate through the second gear 30 and the first gear 22, so that the speed of the speed regulating motor 18 can be adjusted according to the diameter of the frustum to be detected by the probe 20.

[0071] The present invention, by setting up an assembly mechanism, drives the probe 20 to rise during the detection process. During this process, through the cooperation of the cylinder 3101 and the vertical plate 24, the probe 20 can move radially along the workpiece when it reaches the height of each frustum on the workpiece, ensuring that the probe 20 always maintains a constant lifting distance from the detection surface to ensure sensitivity.

[0072] Secondly, by setting the speed regulation mechanism, during the ascent of the probe 20, the speed regulation mechanism is triggered before the probe 20 reaches the frustum position on the workpiece, so that the speed of the speed regulation motor 18 can be adjusted accordingly according to the diameter of the frustum to be detected by the probe 20. This allows frustums of different diameters to automatically match the appropriate speed when being detected. While ensuring detection efficiency, this avoids the situation where the surface linear velocity is significantly higher than that of the small diameter section when the probe 20 scans the area of ​​the large diameter frustum due to the constant rotation speed of the workpiece. This would lead to an excessive relative speed between the probe 20 and the detection point, causing a series of problems due to excessive scanning speed. This ensures the full establishment of the eddy current field at the defect location, avoids the disturbance information from leaving the effective sensing range of the magnetic sensor before it is fully generated, and avoids dynamic distortion phenomena such as amplitude attenuation, steep leading edge, and truncation of the acquired signal. This effectively guarantees the accuracy and reliability of the eddy current detection system based on the magnetic sensor.

[0073] As a further embodiment of the present invention, please refer again. Figure 5 , Figure 7 as well as Figure 8 The workpiece transfer mechanism includes two lifting plates 5 movably mounted on the inspection cabinet 1, and a transverse plate 6 movably mounted between the two lifting plates 5. The transverse plate 6 is provided with two sets of clamping fixtures. The lifting plates 5 can be driven to rise and fall by a first linear drive module 7 mounted on the inspection cabinet 1, and the transverse plate 6 can be driven to move horizontally by a second linear drive module 8 mounted on the two lifting plates 5.

[0074] It should be added that the clamping fixture is an application of existing technology, and its specific structure will not be described in detail in this application.

[0075] In this embodiment, it should be noted that the first linear drive module 7, the second linear drive module 8, and the third linear drive module 25 are the same, all of which are driven by a lead screw and a servo motor to achieve linear drive of the component.

[0076] Furthermore, during operation, the first linear drive module 7 drives the lifting plate 5 to move downwards. The two sets of clamping fixtures are respectively located above the free turntable 4 and the first transmission line 2. Thus, one set of clamping fixtures clamps the workpieces that have been inspected on the free turntable 4, while the other set of clamping fixtures clamps the workpieces that have not been inspected on the first transmission line 2. Subsequently, the lifting plate 5 is raised, so that the two workpieces are picked up. The second linear drive module 8 then drives the transverse plate 6 to move horizontally, so that the uninspected workpieces are moved above the free turntable 4, and the inspected workpieces are moved above the second transmission line 3. Then, the first linear drive module 7 drives the lifting plate 5 to move downwards again, and the two sets of clamping fixtures release the workpieces, so that the inspected workpieces are placed on the second transmission line 3, and the uninspected workpieces are placed on the free turntable 4.

[0077] As a further embodiment of the present invention, the limiting mechanism includes four first guide rails 9 fixed on the testing cabinet 1 and equidistantly distributed along the circumference. The first guide rails 9 are inclined and have driven plates 10 slidably fitted on them. The driven plates 10 are provided with a limiting wheel 11 at one end facing the free turntable 4. Each of the two lifting plates 5 is connected to a set of sliding engagement structures. The sliding engagement structures connect the two driven plates 10 located on the same side of the testing cabinet 1 and can drive the driven plates 10 to slide on the first guide rails 9.

[0078] The sliding fit structure includes a second guide rail 12 fixed on the detection cabinet 1 and a transverse shift seat 13 slidably fitted on the second guide rail 12. The transverse shift seat 13 is fixedly connected to a transmission arm 14 located above the driven plate 10, and the transmission arm 14 is provided with two strip grooves 1401. The driven plate 10 is fixed with a protrusion 1001 that passes through the strip grooves 1401 and is slidably connected to the transmission arm 14.

[0079] The transverse seat 13 is also fixed with a transmission plate 15. The transmission plate 15 is provided with a through groove. The lifting plate 5 is fixed with a follower column 501 that passes through the through groove and is slidably connected to the transmission plate 15. The through groove includes a first groove section 1501 that is inclined and a second groove section 1502 that is vertically arranged and connected to the first groove section 1501.

[0080] In this embodiment, with attachment Figure 1Taking the state shown as an example, at this time, the workpiece to be inspected on the free turntable 4 is in a clamping state, and the follower column 501 is located at the end of the first groove section 1501 away from the second groove section 1502.

[0081] After the workpiece on the free turntable 4 has been inspected, during the downward movement of the clamping fixture, the follower column 501 slides successively in the first groove 1501 and the second groove 1502. Specifically, when the follower column 501 moves in the first groove 1501, it slides with the transmission plate 15, causing the transmission plate 15 to drive the transverse seat 13 and the transmission arm 14 away from the free turntable 4. Thus, the transmission arm 14 can drive the driven plate 10 away from the workpiece on the first guide rail 9 via the protruding column 1001. The workpiece slides, causing the limiting wheel 11 to separate from the workpiece, releasing the workpiece from its clamping and limiting state. Subsequently, the follower column 501 moves in the second groove section 1502, keeping the limiting wheel 11 separated from the workpiece, facilitating the transfer of the workpiece by the clamping fixture. After the workpiece transfer process is completed, during the upward reset process of the clamping fixture, the follower column 501 again drives the transmission plate 15 to move the transverse seat 13 and the transmission arm 14 toward the free turntable 4 through the first groove section 1501, so that the limiting wheel 11 completes the clamping and limiting of the workpiece to be inspected.

[0082] A defect detection method for aluminum alloy forgings, employing the magnetic induction eddy current detection device for defects in aluminum alloy forgings as described in any one of the above-mentioned methods, includes the following steps:

[0083] Step 1: The workpiece transfer mechanism transfers the workpiece to be inspected from the first transmission line 2 to the free turntable 4;

[0084] Step 2: Drive wheel 19 comes into contact with the workpiece, causing the workpiece to rotate;

[0085] Step 3: The assembly mechanism drives the probe 20 to rise. When the probe 20 reaches the height of each frustum on the workpiece, it moves radially along the workpiece. The speed regulation mechanism is triggered before the probe 20 reaches the position of the frustum on the workpiece, so that the speed of the speed regulation motor 18 is adjusted according to the diameter of the frustum to be detected by the probe 20, so that the appropriate speed is automatically matched when frustums of different diameters are detected.

[0086] Step 4: After the inspection is completed, the workpiece transfer mechanism simultaneously transfers the workpiece that has been inspected on the free turntable 4 to the second transmission line 3 and transfers the workpiece to be inspected on the first transmission line 2 to the free turntable 4.

[0087] Step 5: Based on the test results, classify the workpieces on the second transmission line 3.

[0088] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0089] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A magnetic induction defect eddy current detection device for aluminum alloy forgings, comprising a detection cabinet and a free turntable mounted on the detection cabinet for supporting the workpiece to be inspected; Its features are, Also includes: The first transmission line and the second transmission line are respectively located on both sides of the inspection cabinet, and the workpiece transfer mechanism is located on the inspection cabinet. The workpiece transfer mechanism is used to simultaneously transfer the workpiece that has been inspected on the free turntable to the second transmission line and transfer the workpiece to be inspected located on the first transmission line to the free turntable. The workpiece transfer mechanism is connected to the limiting mechanism located on the inspection cabinet. After the workpiece transfer is completed, the limiting mechanism performs a clamping action on the workpiece to be inspected on the free turntable. The drive wheel, which is mounted on the inspection cabinet via a pneumatic mechanism, can contact the workpiece after it is clamped and drive the workpiece to rotate. The probe, which is mounted on the inspection cabinet via the assembly mechanism, rises during the inspection process. When the probe reaches the connection point of different diameter frustums on the workpiece, it moves radially along the workpiece. The speed regulation mechanism connected to the assembly mechanism is triggered, which can change the rotational speed of the drive wheel and the workpiece.

2. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 1, characterized in that, The pneumatic mechanism includes two cylinders rotatably mounted on the side of the testing cabinet, and an assembly plate is slidably provided on the testing cabinet. The movable ends of the two cylinders are rotatably connected to the assembly plate. The drive wheel is rotatably mounted on the bottom of the assembly plate, and a speed-regulating motor is also mounted on the assembly plate. The output end of the speed-regulating motor is connected to the rotation shaft of the drive wheel.

3. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 2, characterized in that, The assembly mechanism includes two vertical plates fixed to the testing cabinet, and also includes: The mounting plate is located on the two vertical plates and connected to the speed regulating mechanism. The mounting plate can be driven by two third linear drive modules respectively mounted on the two vertical plates to perform lifting and lowering actions. Two sets of elastic components are mounted on the mounting plate and connected to the probe. The elastic components cooperate with the vertical plate to allow the probe to move radially along the workpiece when it reaches the connection point of different diameter frustums on the workpiece.

4. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 3, characterized in that, The elastic component includes an assembly arm that is fixed to the mounting plate and is hollow inside, a guide post fixed inside the assembly arm, and a slider that is slidably disposed inside the assembly arm and slidably connected to the guide post. The guide post is fitted with a cylindrical spring on its outer periphery. The two ends of the cylindrical spring are respectively connected to the inner wall of the assembly arm and the slider. The probe is fixedly connected to the slider.

5. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 4, characterized in that, A cylinder is fixed to one side of the slider facing the vertical plate. The vertical plate is provided with a groove adapted to the cylinder. The cylinder extends into the groove and is slidably connected to the vertical plate. The groove includes a first vertical section and a plurality of L-shaped sections connecting the first vertical section. The groove also includes an inclined section connecting the L-shaped section, a second vertical section communicating with the inclined section, and a straight section connecting the second vertical section and the first vertical section. A one-way limiting plate is also rotatably installed on the vertical plate, and the one-way limiting plate is located at the end of the inclined section facing the second vertical section.

6. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 5, characterized in that, The speed control mechanism includes a speed controller mounted on the testing cabinet, a vertical shaft rotatably mounted on the testing cabinet, and a sleeve fixed to the mounting plate and slidably fitted with the vertical shaft. The knob of the speed controller is fixedly connected to a first gear, and a second gear meshing with the first gear is fixed on the vertical shaft. The sleeve is fixed with a drive column, and the vertical shaft is provided with a sliding groove adapted to the drive column. The drive column extends into the sliding groove and is slidably connected to the vertical shaft. The sliding groove includes a first groove arranged along the axial direction of the vertical shaft and a plurality of second grooves arranged in a spiral shape. The plurality of second grooves are connected by a third groove, which is arranged along the axial direction of the vertical shaft.

7. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 1, characterized in that, The workpiece transfer mechanism includes two lifting plates movably mounted on the inspection cabinet, a transverse plate movably mounted between the two lifting plates, and two sets of clamping fixtures mounted on the transverse plate. The lifting plate can be driven to rise and fall by a first linear drive module mounted on the testing cabinet, and the transverse plate can be driven to move horizontally by a second linear drive module mounted on the two lifting plates.

8. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 7, characterized in that, The limiting mechanism includes four first guide rails fixed to the detection cabinet and equidistantly distributed along the circumference. The first guide rails are inclined and have driven plates slidably fitted on them. The end of the driven plate facing the free turntable is provided with a limiting wheel. Each of the two lifting plates is connected to a set of sliding fit structures. The sliding fit structures connect two driven plates located on the same side of the testing cabinet and can drive the driven plates to slide on the first guide rail.

9. The eddy current detection device for defects in aluminum alloy forgings using magnetic induction according to claim 8, characterized in that, The sliding fit structure includes a second guide rail fixed to the testing cabinet and a transverse sliding seat slidably fitted on the second guide rail. The transverse sliding seat is fixedly connected to a transmission arm located above the driven plate, and the transmission arm is provided with two strip grooves. The driven plate is fixed with a protrusion that passes through the strip grooves and is slidably connected to the transmission arm. The transverse seat is also fixed with a transmission plate, which has a through groove. The lifting plate is fixed with a follower column that passes through the through groove and is slidably connected to the transmission plate. The through groove includes a first groove section that is inclined and a second groove section that is vertically arranged and connected to the first groove section.

10. A method for defect detection of aluminum alloy forgings, employing the magnetic induction eddy current detection device for defects in aluminum alloy forgings as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: The workpiece transfer mechanism transfers the workpiece to be inspected from the first transmission line to the free turntable; Step two: The drive wheel comes into contact with the workpiece, causing the workpiece to rotate; Step 3: The assembly mechanism drives the probe to rise. When the probe reaches the height of each frustum on the workpiece, it moves radially along the workpiece. The speed regulation mechanism is triggered before the probe reaches the position of the frustum on the workpiece, so that the speed of the speed regulation motor is adjusted according to the diameter of the frustum to be detected by the probe, so that frustums of different diameters are automatically matched with appropriate speeds when being detected. Step four: After the inspection is completed, the workpiece transfer mechanism simultaneously transfers the workpiece that has been inspected on the free turntable to the second transmission line and transfers the workpiece to be inspected on the first transmission line to the free turntable. Step 5: Based on the test results, classify the workpieces on the second transmission line.

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