Nondestructive testing device for shaft parts

Abstract

The invention belongs to the technical field of part detection, and particularly discloses a shaft part nondestructive testing device which comprises a chain scraper conveyor. The magnetic attraction turnover mechanism is arranged on one side of the middle of the chain scraper conveyor, the first telescopic cylinder is located on one side of the magnetic attraction turnover mechanism, the rotating shaft is vertically installed at the output end of the first telescopic cylinder, the two guide rods are fixed to the lower portion of the rotating shaft, the translation assembly is fixed to the top end of the rotating shaft, and the installation vertical rod is driven by the translation assembly. And a second servo motor is coaxially arranged at the bottom end of the mounting vertical rod, a rotating disc is coaxially arranged at the output end of the second servo motor, and an industrial camera and a positioning probe are arranged below the rotating disc. The device can automatically position the axis of a shaft part conveyed to an imprecise position, drives an industrial camera to carry out equidistant scanning imaging along the axis track of the part, effectively overcomes the axis positioning problem caused by workpiece conveying position randomness, ensures the constancy of the object distance of the camera in the detection process, and improves the detection accuracy. And the pixel quantization error caused by the change of the imaging distance is eliminated.

Description

Technical Field

[0001] This invention belongs to the field of parts inspection technology, specifically referring to a non-destructive testing device for shaft parts. Background Technology

[0002] As core components of mechanical transmission systems, shaft parts' machining quality and surface integrity directly determine the operational accuracy, fatigue life, and safety of the entire equipment. These parts are widely used in high-end equipment manufacturing, covering key industries such as aerospace, automotive manufacturing, precision instruments, and heavy engineering machinery. In traditional industrial production processes, to achieve efficient, non-contact quality control, machine vision-based non-destructive testing technology has gradually replaced manual visual inspection, becoming the mainstream online inspection method. Existing general inspection solutions typically use high-resolution industrial cameras to acquire real-time images of shaft parts on the transmission line and analyze and identify surface features using image processing algorithms. However, in actual industrial applications, existing vision inspection devices still face significant technical bottlenecks, mainly in the following two aspects: First, existing industrial camera vision inspection systems typically rely on pre-calibrated pixel equivalents (i.e., the actual physical size represented by each pixel) for quantitative assessment of defect size. However, this calibration is usually based on a fixed object distance (the distance from the camera lens to the surface of the object being measured). According to the principles of geometrical optics imaging, when the imaging distance between the industrial camera and the sidewall of the shaft-like part changes, the optical magnification of the system also changes. Specifically, as the distance between the camera and the surface of the shaft-like part increases, due to the perspective projection effect (i.e., the "nearer objects appear larger, farther objects appear smaller" principle), the number of pixels occupied by a defect of the same physical size on the target surface of the image sensor will decrease accordingly. This results in the defect size calculated by the system based on the number of pixels often being smaller than the true value. This misjudgment caused by imaging distance drift can easily lead to serious missed detections or underestimation of the defect level, thus creating potential quality problems.

[0003] Secondly, in automated production lines, shaft parts are typically transported via conveyor belts or roller tracks. Their starting and stopping positions are highly random and discrete, influenced by mechanical inertia, friction coefficients, and control precision. Most existing inspection devices employ fixed positions or preset trajectories for scanning, lacking the ability to adaptively address the actual axis of the shaft parts. Because the instantaneous axis of the shaft parts cannot be accurately located in the automated process, the inspection device struggles to ensure that the scanning module consistently performs equidistant scanning along the axis of the shaft parts. This lack of positioning and tracking capability further exacerbates the aforementioned fluctuations in imaging distance, failing to meet the process requirements of high-precision non-destructive testing. Summary of the Invention

[0004] To address the above issues, this invention provides a non-destructive testing device for shaft-type parts. This device can automatically locate the axis of shaft-type parts transported to a non-precise position and drive an industrial camera to perform equidistant scanning imaging along the axis trajectory of the parts. This effectively overcomes the axis positioning problem caused by the randomness of the workpiece transport position, ensures the constant camera-object distance during the testing process, eliminates pixel quantization errors caused by changes in imaging distance, and significantly improves the accuracy of non-destructive testing and the stability of automated operations.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a non-destructive testing device for shaft parts, including a chain conveyor, a magnetic attraction flipping mechanism located on one side of the middle of the chain conveyor, a first telescopic cylinder located on one side of the magnetic attraction flipping mechanism, a rotating shaft vertically installed at the output end of the first telescopic cylinder, two guide rods fixed to the lower part of the rotating shaft, a translation component fixed to the top of the rotating shaft, and a mounting vertical rod driven by the translation component.

[0006] Furthermore, a second servo motor is coaxially mounted at the bottom end of the mounting rod, and a turntable is coaxially mounted at the output end of the second servo motor. An industrial camera and a positioning probe are mounted below the turntable for scanning and positioning, respectively.

[0007] Furthermore, the first telescopic cylinder is horizontally positioned and perpendicular to the conveying direction of the chain conveyor, and the two guide rods are horizontally fixed to the rotating shaft at an angular interval and point to the axis of the rotating shaft; when the mounting vertical rod is pushed by the translation component, its axis is always located in the vertical plane containing the angle bisector of the angle formed by the two guide rods.

[0008] Furthermore, the magnetic flipping mechanism includes a pair of brackets on one side of the chain conveyor, a magnetic plate rotatably disposed between the brackets, an electromagnet driver disposed on the back of the magnetic plate, a worm wheel coaxially fixed at the rotatable connection of the magnetic plate, a worm meshing with the worm wheel, and a first servo motor fixed on the bracket for driving the worm to rotate. The magnetic plate switches between a vertical state and a horizontal state.

[0009] Furthermore, the translation component includes a lead screw guide rail horizontally fixed to the top of the rotating shaft and a movable platform slidably disposed on the lead screw guide rail. The mounting vertical rod is vertically fixed to the bottom of the movable platform, and the mounting vertical rod is located on the side of the rotating shaft close to the chain conveyor.

[0010] Furthermore, the conveying surface of the chain conveyor is provided with an array of grooves for placing shaft parts. The length direction of the grooves is perpendicular to the conveying direction of the chain conveyor. The side of the conveying surface of the chain conveyor facing the magnetic plate is penetrated by the grooves, which facilitates the picking up of shaft parts.

[0011] Furthermore, a vertical second telescopic cylinder and a third telescopic cylinder are fixed on the turntable. The industrial camera is fixed to the output end of the second telescopic cylinder, and the positioning probe is fixed to the output end of the third telescopic cylinder. The lens of the industrial camera faces the axis of the turntable, and the positioning probe is horizontally set with its front end pointing to the axis of the turntable.

[0012] Furthermore, the horizontal distance between the front end of the positioning probe and the center line of the turntable is equal to the radius of the shaft part, and the industrial camera is set opposite to the positioning probe.

[0013] Furthermore, the two guide rods are located on a horizontal plane at the same height as the bottom of the shaft part in the vertical state, and the turntable is located above the shaft part in the vertical state. In the initial state, the two guide rods are set towards the chain conveyor to capture the shaft part.

[0014] Furthermore, when the second servo motor is in the initial reset state, the axis of the positioning probe is located in the vertical plane containing the angle bisector of the angle formed by the two guide rods, and the positioning probe is located between the mounting rod and the rotating shaft.

[0015] Furthermore, the rotating shaft is rotatably connected to the output end of the first telescopic cylinder via a bearing engagement, enabling the rotating shaft to adaptively rotate according to the contact conditions between the two guide rods and the shaft components.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows: (1) In view of the randomness of the position of shaft parts during the transportation process mentioned in the background technology, which makes it impossible for the camera to accurately locate the axis center, thus causing changes in the imaging object distance and errors in the pixel equivalent estimation, the present invention uses a first telescopic cylinder to push a rotating shaft with free rotation capability, and uses two guide rods set at an angle to contact the shaft parts. No matter where the shaft parts are located, under the action of thrust, the rotating shaft will adaptively rotate until both guide rods are tangent to the surface of the shaft parts. Based on the geometric principle, the translation component drives the mounting vertical rod to move along the bisector of the angle. With the distance fixing function of the positioning probe, the true axis center position of the shaft parts can be physically locked, and the rotation center of the turntable is completely coincident with the axis center of the shaft parts. This design ensures that the industrial camera always maintains a constant distance (equidistant scanning) relative to the surface of the shaft parts when scanning with the rotation of the turntable, thereby solving the defect size quantification error caused by perspective projection effect (near is larger and far is smaller). High-precision surface inspection data can be obtained without complex software compensation, which significantly improves the reliability of the inspection results.

[0017] (2) This invention introduces a magnetic flipping mechanism in conjunction with a chain conveyor. The groove on the chain conveyor is used to initially limit the shaft part. Then, the magnetic plate attracts and flips the horizontally transported shaft part to a vertical state, thereby changing the shaft part from a horizontal to a vertical position. Combined with the above-mentioned adaptive centering mechanism, the industrial camera can perform 360-degree surround shooting around the shaft part without blind spots, avoiding the detection blind spots caused by the conveyor belt. After the detection is completed, the magnetic flipping mechanism can accurately reset the shaft part to the conveyor line. The whole process does not require manual intervention and can be directly embedded into the existing automated production line, which greatly improves the automation level and operation efficiency of online detection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the non-destructive testing device for shaft parts proposed in this invention.

[0019] Figure 2 This is a side view of the initial state of a non-destructive testing device for shaft parts proposed in this invention.

[0020] Figure 3 This is a top view of the initial state of a non-destructive testing device for shaft parts proposed in this invention.

[0021] Figure 4 This is a three-dimensional structural diagram of a non-destructive testing device for shaft parts proposed in this invention during testing.

[0022] Figure 5 for Figure 4 Enlarged view of section A in the middle.

[0023] Figure 6 This is a schematic diagram showing the structural relationship between the mounting vertical rod and the rotating shaft of a non-destructive testing device for shaft parts proposed in this invention.

[0024] Figure 7 for Figure 2 Enlarged view of section B.

[0025] Figure 8 This is a schematic diagram showing the position of the lead screw guide rail during testing in a non-destructive testing device for shaft parts proposed in this invention.

[0026] Figure 9 This is a schematic diagram showing the position of the guide rod during testing in a non-destructive testing device for shaft parts proposed in this invention.

[0027] Among them, 1. Chain conveyor, 11. Groove, 2. Shaft parts, 3. First telescopic cylinder, 31. Rotary shaft, 32. Guide rod, 4. Magnetic flipping mechanism, 41. Magnetic plate, 42. Bracket, 43. Electromagnetic driver, 44. Worm gear, 45. Worm, 46. First servo motor, 5. Translation component, 51. Lead screw guide rail, 52. Movable platform, 6. Mounting vertical rod, 61. Second servo motor, 7. Turntable, 8. Industrial camera, 81. Second telescopic cylinder, 9. Positioning probe, 91. Third telescopic cylinder.

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the present invention proposes a non-destructive testing device for shaft parts, which mainly includes a chain conveyor 1, a magnetic flipping mechanism 4, a first telescopic cylinder 3, a rotating shaft 31, a guide rod 32, a translation component 5, a mounting vertical rod 6, a second servo motor 61, a turntable 7, an industrial camera 8, and a positioning probe 9.

[0032] As the main material transport carrier, the chain conveyor 1 has several grooves 11 arranged along the conveying direction on its conveying surface for placing shaft parts 2. The length direction of the grooves 11 is perpendicular to the conveying direction of the chain conveyor 1. This design uses gravity and friction to keep the shaft parts 2 in a relatively stable posture during the conveying process, preventing them from rolling randomly. In order to cooperate with the subsequent flipping action, the side of the conveying surface of the chain conveyor 1 facing the magnetic flipping mechanism 4 is penetrated by the grooves 11 to form an open port.

[0033] The magnetic flipping mechanism 4 is located on one side of the middle of the chain conveyor 1. Specifically, it includes a pair of brackets 42 fixed on the foundation or frame. A magnetic plate 41 is rotatably connected between the two brackets 42. An electromagnet driver 43 is provided on the back of the magnetic plate 41 to control the magnetic force on and off on the front of the magnetic plate 41. In order to realize the flipping action, a worm wheel 44 is coaxially fixed at the rotatable connection of the magnetic plate 41. The worm wheel 44 meshes with a worm 45. The worm 45 is driven to rotate by a first servo motor 46 fixed on the bracket 42. Through the self-locking characteristics of the worm wheel 44 and worm 45 structure, the positioning accuracy and stability of the magnetic plate 41 when switching between the vertical state (adsorption position) and the horizontal state (detection position) can be guaranteed.

[0034] To address the issue of inconsistent imaging distance caused by the randomness of the position of shaft component 2, this device designs an adaptive center-finding mechanism based on geometric principles. The first telescopic cylinder 3 is horizontally positioned on one side of the magnetic flipping mechanism 4, and its telescopic direction is perpendicular to the conveying direction of the chain conveyor 1. The output end of the first telescopic cylinder 3 is rotatably connected to a vertical rotating shaft 31 via a bearing, allowing the rotating shaft 31 to rotate freely relative to the end of the first telescopic cylinder 3, thereby achieving adaptive adjustment.

[0035] At the lower part of the rotating shaft 31, two guide rods 32 are fixed horizontally at an angle. These two guide rods 32 point to the axis of the rotating shaft 31 and are located on a horizontal plane at the same height as the bottom of the shaft part 2 in the vertical state. In the initial state, the openings of the two guide rods 32 face the chain conveyor 1, forming a "V"-shaped capture port.

[0036] A translation component 5 is horizontally fixed at the top of the rotating shaft 31. The component includes a lead screw guide rail 51 and a movable platform 52 slidably mounted on the lead screw guide rail 51. A mounting rod 6 is vertically fixed at the bottom of the movable platform 52, and the mounting rod 6 is located on the side of the rotating shaft 31 close to the chain conveyor 1.

[0037] The present invention has a key geometric position limitation: when the mounting rod 6 is pushed by the translation component 5, its axis is always located in the vertical plane where the angle bisector of the angle formed by the two guide rods 32 is located. This design is based on the geometric theorem that the angle bisector of two tangents drawn from a point outside a circle must pass through the center of the circle.

[0038] The bottom end of the mounting rod 6 is coaxially mounted with a second servo motor 61. The output end of the motor is coaxially connected to a turntable 7. The turntable 7 is located above the shaft part 2 in the vertical state. A vertically arranged second telescopic cylinder 81 and a third telescopic cylinder 91 are respectively fixed on the turntable 7.

[0039] The industrial camera 8 is fixed to the output end of the second telescopic cylinder 81, and its lens optical axis always faces the axis of the turntable 7. The positioning probe 9 is fixed to the output end of the third telescopic cylinder 91, is horizontally set, and its front tip points to the axis of the turntable 7. It should be noted that the horizontal distance between the front end of the positioning probe 9 and the axis of the turntable 7 is preset to be equal to the radius of the shaft part 2 to be measured. The industrial camera 8 and the positioning probe 9 are set opposite to each other on the turntable 7.

[0040] In the initial reset state (i.e., when the second servo motor 61 is reset to zero), the axis of the positioning probe 9 is located in the vertical plane containing the angle bisector of the angle formed by the two guide rods 32, and the positioning probe 9 is located between the mounting rod 6 and the rotating shaft 31.

[0041] The specific work process is as follows: Adsorption and flipping: The shaft part 2 is placed in the groove 11 of the chain conveyor 1 and moves with the conveyor belt. When a shaft part 2 moves into the range of the magnetic plate 41, the chain conveyor 1 stops according to the preset program. At this time, the magnetic plate 41 is in a vertical state. The electromagnet driver 43 is turned on, and the magnetic plate 41 generates a strong magnetic force, which attracts one end of the shaft part 2 in the groove 11 and firmly adsorbs it onto the surface of the magnetic plate 41. The first servo motor 46 is started, which drives the worm gear 45 to rotate, thereby driving the worm wheel 44 and the magnetic plate 41 to flip 90 degrees, changing from a vertical state to a horizontal state. At this time, the shaft part 2 adsorbed on the magnetic plate 41 becomes vertical, and its bottom end is firmly fixed by the magnetic force.

[0042] Adaptive geometric centering: The first telescopic cylinder 3 extends forward, pushing the rotating shaft 31 and two guide rods 32 closer to the vertical shaft part 2. Since the position of the shaft part 2 after stopping is random, the output end of the first telescopic cylinder 3 is usually not directly aligned with the axis of the shaft part 2. When one of the guide rods 32 first contacts the surface of the shaft part 2, the rotating shaft 31, connected to the output end of the first telescopic cylinder 3 via a bearing, will adaptively rotate under the thrust until the other guide rod 32 also contacts the surface of the shaft part 2. At this point, both guide rods 32 are tangent to the outer circular surface of the shaft part 2. When the first telescopic cylinder 3 detects that the resistance has reached a preset threshold, it stops extending. At this point, the rotating shaft 31 is restricted by the reaction force of the shaft part 2 and no longer rotates. Since the translation component 5 is fixed to the top of the rotating shaft 31, the lead screw guide rail 51 also rotates by the same angle. According to the plane geometry theorem: two tangent lines are drawn from a point outside the circle (the center of the rotating shaft 31) to the circle (the surface of the shaft part 2). The line (guide rod 32) connecting this point to the center of the circle bisects the angle between the tangents. Therefore, the vertical plane containing the angle bisector of the angle between the two guide rods 32 must pass through the axis of the shaft part 2. Since the device is designed so that the movement trajectory of the mounting rod 6 under the push of the movable platform 52 is always within the plane of the angle bisector, the translation direction of the mounting rod 6 is automatically aligned with the axis of the shaft part 2. The translation component 5 is driven to work, driving the mounting rod 6, the second servo motor 61 and the turntable 7 to move towards the shaft part 2 along the angle bisector direction. In the initial state, the positioning probe 9 is located on the plane of the angle bisector and points to the axis. When the front end of the positioning probe 9 touches the upper outer wall of the shaft part 2, the translation component 5 stops. At this time, according to the geometric relationship, the front end of the positioning probe 9 contacts the surface of the shaft part 2, and the distance from the front end of the positioning probe 9 to the axis of the turntable 7 is preset to be equal to the radius of the shaft part 2. Therefore, the axis of the turntable 7 is completely coincident with the axis of the shaft part 2 in space.

[0043] Isometric scanning detection: Control the third telescopic cylinder 91 to retract, causing the positioning probe 9 to move upward and disengage from the shaft part 2. Then, control the second telescopic cylinder 81 to extend, moving the industrial camera 8 downward to various detection heights. Start the second servo motor 61 to drive the turntable 7 to rotate. Since the axis of the turntable 7 is now aligned with the axis of the shaft part 2, the industrial camera 8 will perform concentric circular motion around the shaft part 2, realizing isometric scanning detection of the entire surface of the shaft part 2, completely eliminating pixel quantization errors caused by changes in object distance.

[0044] Reset and Cycle: After the test is completed, the industrial camera 8 resets and moves upward, the translation component 5 retracts, the first telescopic cylinder 3 retracts, the second servo motor 61 resets, so that the positioning probe 9 returns to its initial position, the magnetic flipping mechanism 4 flips and resets in the opposite direction, the shaft part 2 falls back into the groove 11 of the chain conveyor 1, the electromagnet driver 43 is de-energized and demagnetized, and the chain conveyor 1 starts to enter the next test cycle.

[0045] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0047] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for non-destructive testing of shaft-like parts, comprising a chain conveyor (1), characterized in that: Also include the magnetic side of the chain plate conveyor (1) in the middle of the mechanism (4), located in the magnetic flip mechanism (4) on the side of the first telescopic cylinder (3), vertical installation in the first telescopic cylinder (3) output shaft (31), fixed on the lower part of the two guide rod (32), fixed on the top of the pivot shaft (31) translation component (5) and by the translation component (5) driven by the installation of vertical pole (6); The bottom end of the installation of vertical pole (6) coaxial with the second servo motor (61), the output end of the second servo motor (61) coaxial with the turntable (7), the lower part of the turntable (7) is equipped with industrial camera (8) and positioning probe (9); The first telescopic cylinder (3) is horizontally arranged and perpendicular to the conveying direction of the chain plate conveyor (1), the two guide rods (32) are angularly spaced horizontally fixed on the pivot shaft (31) and directed to the axial line of the pivot shaft (31); When the installation of vertical pole (6) is pushed by the translation component (5), the axial line thereof is always located in the vertical plane of the angle bisector of the included angle between the two guide rods (32).

2. The shaft part non-destructive testing device according to claim 1, characterized in that: The magnetic flip mechanism (4) includes a pair of brackets (42) arranged on one side of the chain plate conveyor (1), a magnetic plate (41) rotatably arranged between the brackets (42), an electromagnet driver (43) arranged on the back of the magnetic plate (41), a worm gear (44) coaxially fixed to the rotating connection of the magnetic plate (41), a worm (45) engaged with the worm gear (44), and a first servo motor (46) fixed to the bracket (42) for driving the worm (45) to rotate, and the magnetic plate (41) is switched between vertical state and horizontal state.

3. The shaft part non-destructive testing device according to claim 2, characterized in that: The translation component (5) includes a screw guide rail (51) horizontally fixed on the top of the pivot shaft (31) and a movable platform (52) slidingly arranged on the screw guide rail (51), the installation of vertical pole (6) is vertically fixed to the bottom of the movable platform (52), and the installation of vertical pole (6) is located on the side of the pivot shaft (31) close to the chain plate conveyor (1).

4. The shaft part non-destructive testing device according to claim 3, characterized in that: The conveying surface of the chain plate conveyor (1) is arrayed with grooves (11) for placing shaft parts (2), the length direction of the grooves (11) is perpendicular to the conveying direction of the chain plate conveyor (1), and the conveying surface of the chain plate conveyor (1) is penetrated by the grooves (11) towards the side of the magnetic plate (41).

5. The shaft part non-destructive testing device according to claim 4, characterized in that: The second telescopic cylinder (81) and the third telescopic cylinder (91) are fixed vertically on the turntable (7), the industrial camera (8) is fixed to the output end of the second telescopic cylinder (81), the positioning probe (9) is fixed to the output end of the third telescopic cylinder (91), the lens of the industrial camera (8) faces the axial line of the turntable (7), and the positioning probe (9) is horizontally arranged with its front end pointing to the axis of the turntable (7).

6. The shaft part non-destructive testing device according to claim 5, characterized in that: The horizontal distance between the front end of the positioning probe (9) and the axial line of the turntable (7) is equal to the radius of the shaft part (2), and the industrial camera (8) is arranged opposite to the positioning probe (9).

7. The shaft part non-destructive testing device according to claim 6, characterized in that: Two guide rods (32) are located on the horizontal plane with the same height as the bottom end of the shaft part (2) in the vertical state, and the rotating disc (7) is located above the shaft part (2) in the vertical state, and in the initial state, the two guide rods (32) are arranged towards the chain plate conveyor (1).

8. The shaft part non-destructive testing device according to claim 7, characterized in that: When the second servo motor (61) is in the initial reset state; the axis of the positioning probe (9) is located in the vertical plane of the angle bisector of the included angle formed by the two guide rods (32), and the positioning probe (9) is located between the mounting vertical rod (6) and the rotating shaft (31).

9. The shaft part non-destructive testing device according to claim 8, characterized in that: The rotating shaft (31) is rotatably connected to the end of the output end of the first telescopic cylinder (3) through a bearing, so that the rotating shaft (31) can adaptively rotate with the contact condition of the two guide rods (32) and the shaft part (2).

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