Tubular workpiece flaw detection machine with groove-shaped structure on circumferential surface and flaw detection method

Abstract

The invention relates to a flaw detection machine for a cylindrical workpiece with a groove-shaped structure on the circumferential surface and a flaw detection method, and the flaw detection machine comprises a transfer module for driving a bottom frame to move between a loading and unloading station and a flaw detection station; the overturning platform is arranged on the bottom frame and can be switched between a horizontal state and an inclined state; the bearing driving module is arranged on the overturning platform and is used for supporting and positioning the to-be-detected workpiece and driving the to-be-detected workpiece to rotate around the axis of the to-be-detected workpiece; the magnetization module is used for magnetizing the to-be-tested workpiece borne on the bearing driving module; the magnetic suspension spraying module is used for spraying the magnetic suspension on the peripheral surface of the to-be-detected workpiece borne on the bearing driving module; and the detection module is used for photographing the to-be-detected workpiece sprayed with the magnetic suspension, and the detection control system judges whether the workpiece meets the quality requirement or not according to the fluorescent magnetic powder trace on the picture. According to the scheme, the cylindrical workpiece is obliquely arranged to pour out the residual magnetic suspension in the circumferential groove-shaped structure, so that the problem of high flaw detection difficulty of the circumferential groove-shaped structure of the cylindrical workpiece can be perfectly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of flaw detection, and in particular to a cylindrical workpiece flaw detector with a groove-shaped structure on the circumference thereof and a flaw detection method. Background Art

[0002] The magnetic particle inspection test is suitable for flaw detection on the surface of cylindrical steel materials such as steel pipes and motor vehicle shafts. In the magnetic particle inspection test, a magnetic powder solution containing magnetic powder is applied to the surface of the object to be inspected, and measures such as applying a magnetic field to the object to be inspected are taken to magnetize the object to be inspected. When flaws such as cracks exist on the surface of the magnetized object to be inspected, magnetic flux leaks from the flaws, so the magnetic powder is attracted by the leaked magnetic flux, forming an indication pattern formed by the magnetic powder. Therefore, by observing this magnetic powder indication pattern, the flaw is inspected.

[0003] In the related technology, it is necessary to perform flaw detection on a cylindrical workpiece with a groove-like structure on the circumference. With the above solution, the magnetic suspension is likely to remain in the groove-like structure and cover the gap, thus affecting the flaw detection results. Currently, manual intervention is mostly used to clean the magnetic suspension remaining in the groove-like structure on the circumference of the cylindrical workpiece, and then take photos for detection. This method has the problems of low detection efficiency, missed detection, and false detection.

[0004] Therefore, in view of the shortcomings of the prior art, it is necessary to design a cylindrical workpiece flaw detector and a flaw detection method having a groove structure on the circumference to solve the above problems. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the present invention aims to provide a cylindrical workpiece flaw detector and a flaw detection method having a groove-shaped structure on the circumference.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the technical solution provided by the present invention is: a cylindrical workpiece flaw detector having a groove-shaped structure on the circumference, comprising: The transfer module is used to drive the chassis to move between the loading and unloading stations and the flaw detection station; A turning platform is arranged on the base frame and can be switched between a horizontal state and an inclined state; A bearing drive module is disposed on the flip platform and is used to support and position the workpiece to be measured, and to drive the workpiece to be measured to rotate around its own axis; A magnetization module, used for magnetizing the workpiece to be tested carried on the carrying drive module; comprising an upper magnetic yoke and a lower magnetic yoke, wherein the lower magnetic yoke is arranged on the flip platform, and the upper magnetic yoke is arranged above the lower magnetic yoke and driven to be lifted obliquely by a lifting drive mechanism; the lifting drive mechanism is configured to drive the upper magnetic yoke to dock with the lower magnetic yoke in an inclined state to form a closed-circuit magnetic yoke; A magnetic suspension spraying module, used for spraying the magnetic suspension on the peripheral surface of the workpiece to be tested carried by the carrying drive module; The detection module is used to take photos of the workpiece to be tested after being sprayed with magnetic suspension, and the detection control system determines whether the workpiece meets the quality requirements based on the fluorescent magnetic powder marks on the photo.

[0007] The preferred technical solution is: the transfer module is composed of a slide rail assembly, a rack, a gear and a transfer motor; the rack is horizontally erected between the loading and unloading stations and the flaw detection station; the slide rail assembly is fixed on both sides of the rack and arranged parallel to the rack; the base frame is slidably mounted on the slide rail assembly; the transfer motor is fixed on the base frame and is used to drive the gear to rotate; the gear is meshed with the rack.

[0008] The preferred technical solution is: the flip platform is mounted on the base frame through a flip adjustment mechanism, and the flip adjustment mechanism is composed of a rotating shaft, a flip cylinder, a slide rail assembly 2, an articulated ear plate 1, an articulated ear plate 2 and a connecting rod. The rotating shaft is laterally rotated on the base frame, and the bottom of the flip platform is fixedly connected to the rotating shaft, the slide rail assembly 2 is longitudinally fixed on the base frame, the articulated ear plate 1 is fixed on the sliding seat of the slide rail assembly 2, and the articulated ear plate 2 is fixed on the bottom of the flip platform, one end of the connecting rod is hinged to the articulated ear plate 1, and the other end of the connecting rod is hinged to the articulated ear plate 2, and the flip cylinder is longitudinally fixed to the base frame and is used to drive the articulated ear plate 1 to slide reciprocatingly on the slide rail assembly 2.

[0009] The preferred technical solution is: the bearing drive module includes three groups of roller and wheel assemblies, and the roller and wheel assemblies are composed of roller mechanisms and wheel centering mechanisms. The three groups of roller mechanisms are arranged in a Y shape on the flip platform and are used to support and drive the workpiece to be measured to rotate; the three groups of wheel centering mechanisms are arranged in a one-to-one correspondence with the three groups of roller mechanisms and can reciprocate along the axes of the corresponding roller mechanisms. The three groups of wheel centering mechanisms are used to position the workpiece to be measured.

[0010] The preferred technical solution is: the roller mechanism is composed of rollers and roller drive motors, the roller drive motor is arranged on the flip platform and is used to drive the rollers to rotate; the wheel centering mechanism is composed of a slide rail assembly three, a fixed frame, a movable frame, a screw, a centering motor and a roller, the slide rail assembly three is fixedly arranged on both sides of the roller along the axial direction of the roller, the movable frame is slidably arranged on the slide rail assembly three, the fixed frame is arranged at the outer end of the slide rail assembly three, the centering motor is fixedly arranged on the fixed frame and is used to drive the screw arranged along the axial direction of the roller to rotate, the movable frame is fixedly connected to the screw nut screwed on the screw, and the wheel is vertically rotatable on the movable frame.

[0011] The preferred technical solution is: the lifting drive mechanism is composed of an upper yoke mounting frame, a slide rail assembly four, a lifting cylinder, a guide sprocket, a driving sprocket and a chain; the slide rail assembly four is obliquely fixed on the upper yoke mounting frame, the upper yoke is slid on the slide rail assembly four, the lifting cylinder is fixed at the bottom of the upper yoke mounting frame, the driving sprocket is rotatably mounted on the telescopic end of the lifting cylinder, the guide sprocket is rotatably mounted on the upper yoke mounting frame, one end of the chain is fixedly connected to the upper yoke, the other end of the chain is fixedly connected to the middle section of the upper yoke mounting frame, and the middle section of the chain is wound around the guide sprocket and the driving sprocket.

[0012] The preferred technical solution is: the upper yoke mounting frame is fixed on the longitudinal movement mechanism, and the longitudinal movement mechanism is composed of a base, a slide rail assembly five, a transfer motor two, a gear two and a rack two, the rack two is fixed on the outer side of the transverse movement module along the longitudinal direction, the slide rail assembly five is fixed on both sides of the rack two and is arranged parallel to the rack two, the base is slidably mounted on the slide rail assembly five, the transfer motor two is fixed on the base and is used to drive the gear two to rotate, and the gear two is meshed with the rack two.

[0013] The preferred technical solution is: the magnetic suspension spray module is composed of a spray head assembly, a reflux hopper, a magnetic suspension stirring box, a spray pump, a stirring motor and a stirring blade; the spray head assembly is fixedly mounted on the upper magnetic yoke mounting frame and arranged toward the workpiece to be measured; the spray head assembly is connected to the spray pump through a spray pipeline; the spray pump is arranged in the magnetic suspension stirring box; the stirring motor is fixedly mounted on the magnetic suspension stirring box and is used to drive the stirring blade to stir the magnetic suspension in the magnetic suspension stirring box; the reflux hopper is arranged at the lower side end of the flip platform and is used to receive the magnetic suspension sprayed on the workpiece to be measured; the reflux hopper is connected to the magnetic suspension stirring box through a reflux pipeline.

[0014] The preferred technical solution is: a liquid level sensor is provided in the magnetic suspension stirring box; and the detection module adopts a CCD camera.

[0015] A method for using a cylindrical workpiece flaw detector having a groove-shaped structure on the circumferential surface based on any one of the above-mentioned items comprises the following steps: Step 1: Send the workpiece to be measured to the bearing drive module, and the bearing drive module positions the workpiece to be measured; Step 2: The transfer module moves the workpiece to be tested from the loading and unloading station to the flaw detection station; Step 3: Flip the platform to flip the workpiece to be tested from a horizontal state to an inclined state; Step 4: The magnetization module magnetizes the workpiece to be tested in an inclined state; Step 5: The bearing drive module drives the workpiece to be measured to rotate around its own axis; Step 6: The magnetic suspension spraying module sprays the magnetic suspension onto the circumferential surface of the workpiece to be measured in a rotating state. During this process, the magnetic suspension remaining in the groove-shaped structure on the circumferential surface of the workpiece to be measured flows out of the groove-shaped structure; Step 7: The bearing drive module drives the workpiece to be tested to rotate at multiple angles, and the detection module takes photos of the circumference of the workpiece to be tested at multiple angles, and determines whether it meets the quality requirements based on the fluorescent magnetic powder marks on the photos.

[0016] Due to the application of the above technical solution, the present invention has the following beneficial effects: The present invention proposes a cylindrical workpiece flaw detector with a groove-like structure on the circumferential surface. By providing a turning platform and a load-bearing drive module and an inclined magnetization module matched with the turning platform, the cylindrical workpiece can be tilted and positioned and driven to rotate. In this state, the magnetic suspension remaining in the groove-like structure on the circumferential surface of the cylindrical workpiece after being sprayed can be poured out to prevent the residual magnetic suspension from covering the cracks in the groove-like structure and causing flaw detection omissions. The flaw detector has an ingenious structure and can perfectly solve the problem of difficulty in flaw detection of the groove-like structure on the circumferential surface of the cylindrical workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the overall structure of the flaw detector.

[0018] Figure 2 The figure is a schematic structural diagram of the flip platform involved in the present invention at one viewing angle.

[0019] Figure 3 The figure is a schematic structural diagram of the flip platform involved in the present invention from another viewing angle.

[0020] Figure 4 The present invention is a schematic diagram of the structure of the lifting drive mechanism. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] See also Figure 1-Figure 4 . It should be noted that in the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish the descriptions, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example: like Figures 1 to 4 As shown, according to an overall technical concept of the present invention, a cylindrical workpiece flaw detector having a groove structure on the circumference is provided, comprising: The transfer module 1 is used to drive the base frame 2 to move between the loading and unloading stations and the flaw detection station; The turning platform 3 is arranged on the base frame 2 and can be switched between a horizontal state and an inclined state; The bearing drive module 4 is arranged on the turning platform 3 and is used to support and position the workpiece to be measured, and to drive the workpiece to be measured to rotate around its own axis; The magnetization module 5 is used to magnetize the workpiece to be tested carried by the carrying drive module 4; it includes an upper magnetic yoke 51 and a lower magnetic yoke 52, the lower magnetic yoke 51 is arranged on the flip platform 3, the upper magnetic yoke 51 is arranged above the lower magnetic yoke 52 and is driven by the lifting drive mechanism 6 to lift obliquely; the lifting drive mechanism 6 is configured to drive the upper magnetic yoke 51 to dock with the lower magnetic yoke 52 in an inclined state to form a closed-circuit magnetic yoke; The magnetic suspension spraying module 7 is used to spray the magnetic suspension on the peripheral surface of the workpiece to be tested which is carried by the carrying drive module 4; The detection module (not shown) is used to take a photo of the workpiece to be tested after being sprayed with magnetic suspension, and the detection control system determines whether the workpiece meets the quality requirements based on the fluorescent magnetic powder marks on the photo.

[0025] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the transfer module 1 is composed of a slide rail assembly 11, a rack 12, a gear 1 (not shown) and a transfer motor 13. The rack 12 is horizontally mounted between the loading and unloading station and the flaw detection station. The slide rail assembly 11 is fixed on both sides of the rack 12 and arranged parallel to the rack 12. The base frame 2 is slidably mounted on the slide rail assembly 11. The transfer motor 13 is fixed on the base frame 2 and is used to drive the gear 1 to rotate. The gear 1 is meshed with the rack 12.

[0026] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the flip platform 3 is mounted on the base frame through a flip adjustment mechanism 8, and the flip adjustment mechanism 8 is composed of a rotating shaft 81, a flip cylinder 82, a slide rail assembly 83, a hinged ear plate 1 84, a hinged ear plate 2 85 and a connecting rod 86. The rotating shaft 81 is rotated on the base frame 2 in the horizontal direction, and the bottom of the flip platform 3 is fixedly connected to the rotating shaft 81. The slide rail assembly 83 is fixed on the base frame 2 in the longitudinal direction. The hinged ear plate 1 84 is fixed on the sliding seat of the slide rail assembly 83, and the hinged ear plate 2 85 is fixed on the bottom of the flip platform 3. One end of the connecting rod 86 is hinged to the hinged ear plate 1 84, and the other end of the connecting rod 86 is hinged to the hinged ear plate 2 85. The flip cylinder 82 is fixed on the base frame 2 in the longitudinal direction and is used to drive the hinged ear plate 1 84 to slide back and forth on the slide rail assembly 83, thereby driving the flip platform 3 to switch between a horizontal state and an inclined state.

[0027] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the bearing drive module 4 includes three groups of roller and wheel assemblies, and the roller and wheel assemblies are composed of a roller mechanism 41 and a wheel centering mechanism 42. The three groups of roller mechanisms 41 are arranged in a Y shape on the turning platform 3 and are used to support and drive the workpiece to be measured to rotate; the three groups of wheel centering mechanisms 42 are arranged in a one-to-one correspondence with the three groups of roller mechanisms 41 and can reciprocate along the axes of the corresponding roller mechanisms 41, and the three groups of wheel centering mechanisms 42 are used to position the workpiece to be measured.

[0028] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the roller mechanism 41 is composed of a roller 411 and a roller drive motor (not shown), the roller drive motor is arranged on the flip platform 3 and is used to drive the roller 411 to rotate; the wheel centering mechanism 42 is composed of a slide rail assembly 3 421, a fixed frame 422, a movable frame 423, a screw 424, a centering motor 425 and a wheel 426, the slide rail assembly 3 421 is fixedly arranged on both sides of the roller 411 along the axial direction of the roller 411, the movable frame 423 is slidably arranged on the slide rail assembly 3 421, the fixed frame 422 is arranged at the outer end of the slide rail assembly 3 421, the centering motor 425 is fixedly arranged on the fixed frame 422 and is used to drive the screw 424 arranged along the axial direction of the roller 411 to rotate, the movable frame 423 is fixedly connected to the screw nut screwed on the screw 424, and the wheel 426 is vertically rotatably arranged on the movable frame 423.

[0029] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the lifting drive mechanism 6 is composed of an upper yoke mounting frame 61, a slide rail assembly four 62, a lifting cylinder 63, a guide sprocket 64, a driving sprocket 65 and a chain 66. The slide rail assembly four 62 is fixedly arranged on the upper yoke mounting frame 61 along an oblique direction, the upper yoke 51 is slidably arranged on the slide rail assembly four 62, the lifting cylinder 63 is fixedly arranged at the bottom of the upper yoke mounting frame 61, the driving sprocket 65 is rotatably arranged on the telescopic end of the lifting cylinder 63, the guide sprocket 64 is rotatably arranged on the upper yoke mounting frame 61, one end of the chain 66 is fixedly connected to the upper yoke 51, and the other end of the chain 66 is fixedly connected to the middle section of the upper yoke mounting frame 61, and the middle section of the chain 66 is wound around the guide sprocket 64 and the driving sprocket 65.

[0030] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the upper yoke mounting frame 61 is fixed on the longitudinal movement mechanism (not shown), and the longitudinal movement mechanism is composed of a base, a slide rail assembly five, a transfer motor two, a gear two and a rack two. The rack two is fixed on the outer side of the transverse movement module along the longitudinal direction, the slide rail assembly five is fixed on both sides of the rack two and is arranged parallel to the rack two, the base is slidably mounted on the slide rail assembly five, the transfer motor two is fixed on the base and is used to drive the gear two to rotate, and the gear two is meshed with the rack two.

[0031] like Figures 1 to 4As shown, in an exemplary embodiment of the present invention, the magnetic suspension spray module 7 is composed of a spray head assembly 71, a reflux hopper 72, a magnetic suspension stirring box 73, a spray pump 74, a stirring motor (not shown) and a stirring blade. The spray head assembly 71 is fixedly mounted on the upper magnetic yoke mounting frame 61 and is arranged toward the workpiece to be measured. The spray head assembly 71 is connected to the spray pump 74 through a spray pipeline. The spray pump 74 is arranged in the magnetic suspension stirring box 73. The stirring motor is fixed on the magnetic suspension stirring box 73 and is used to drive the stirring blade to stir the magnetic suspension in the magnetic suspension stirring box 73. The reflux hopper 72 is arranged at the lower side end of the turning platform 3 and is used to receive the magnetic suspension sprayed on the workpiece to be measured. The reflux hopper 72 is connected to the magnetic suspension stirring box 73 through a reflux pipeline.

[0032] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, a liquid level sensor is provided in the magnetic suspension stirring box 73; and the detection module adopts a CCD camera.

[0033] In addition, the present application also relates to a method for using a cylindrical workpiece flaw detector having a groove-shaped structure on a circumferential surface, comprising the following steps: Step 1: Send the workpiece to be measured to the bearing drive module 4, and the bearing drive module 4 positions the workpiece to be measured; Step 2: The transfer module 1 moves the workpiece to be tested from the loading and unloading station to the flaw detection station; Step 3: Flip the workpiece to be tested from a horizontal state to an inclined state by flipping the platform 3; Step 4: The magnetization module 5 magnetizes the workpiece to be tested in an inclined state; Step 5: The bearing drive module 4 drives the workpiece to be measured to rotate around its own axis; Step 6: The magnetic suspension spraying module 7 sprays the magnetic suspension onto the circumferential surface of the workpiece to be measured in a rotating state. During this process, the magnetic suspension remaining in the groove-shaped structure on the circumferential surface of the workpiece to be measured flows out of the groove-shaped structure; Step 7: The bearing drive module 4 drives the workpiece to be tested to rotate at multiple angles, and the detection module takes photos of the circumference of the workpiece to be tested at multiple angles, and determines whether it meets the quality requirements based on the fluorescent magnetic powder marks on the photos.

[0034] Therefore, the present invention has the following advantages: The present invention proposes a cylindrical workpiece flaw detector with a groove-like structure on the circumferential surface. By providing a turning platform and a load-bearing drive module and an inclined magnetization module matched with the turning platform, the cylindrical workpiece can be tilted and positioned and driven to rotate. In this state, the magnetic suspension remaining in the groove-like structure on the circumferential surface of the cylindrical workpiece after being sprayed can be poured out to prevent the residual magnetic suspension from covering the cracks in the groove-like structure and causing flaw detection omissions. The flaw detector has an ingenious structure and can perfectly solve the problem of difficulty in flaw detection of the groove-like structure on the circumferential surface of the cylindrical workpiece.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A cylindrical workpiece flaw detector having a groove-shaped structure on the circumference, characterized in that: include: The transfer module is used to drive the chassis to move between the loading and unloading stations and the flaw detection station; A turning platform is arranged on the base frame and can be switched between a horizontal state and an inclined state; A bearing drive module is disposed on the flip platform and is used to support and position the workpiece to be measured, and to drive the workpiece to be measured to rotate around its own axis; A magnetization module, used for magnetizing the workpiece to be tested carried on the carrying drive module; comprising an upper magnetic yoke and a lower magnetic yoke, wherein the lower magnetic yoke is arranged on the flip platform, and the upper magnetic yoke is arranged above the lower magnetic yoke and driven to be lifted obliquely by a lifting drive mechanism; the lifting drive mechanism is configured to drive the upper magnetic yoke to dock with the lower magnetic yoke in an inclined state to form a closed-circuit magnetic yoke; A magnetic suspension spraying module, used for spraying the magnetic suspension on the peripheral surface of the workpiece to be tested carried by the carrying drive module; The detection module is used to take photos of the workpiece to be tested after being sprayed with magnetic suspension, and the detection control system determines whether the workpiece meets the quality requirements based on the fluorescent magnetic powder marks on the photo.

2. A cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 1, characterized in that: The transfer module is composed of a slide rail assembly, a rack, a gear and a transfer motor. The rack is horizontally installed between the loading and unloading stations and the flaw detection station. The slide rail assembly is fixed on both sides of the rack and arranged parallel to the rack. The base frame is slidably mounted on the slide rail assembly. The transfer motor is fixed on the base frame and is used to drive the gear to rotate. The gear is meshed with the rack.

3. A cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 1, characterized in that: The flip platform is mounted on the base frame through a flip adjustment mechanism, and the flip adjustment mechanism is composed of a rotating shaft, a flip cylinder, a slide rail assembly 2, an articulated ear plate 1, an articulated ear plate 2 and a connecting rod. The rotating shaft is laterally rotated on the base frame, and the bottom of the flip platform is fixedly connected to the rotating shaft. The slide rail assembly 2 is longitudinally fixed on the base frame, the articulated ear plate 1 is fixed on the sliding seat of the slide rail assembly 2, and the articulated ear plate 2 is fixed on the bottom of the flip platform. One end of the connecting rod is hinged to the articulated ear plate 1, and the other end of the connecting rod is hinged to the articulated ear plate 2. The flip cylinder is longitudinally fixed to the base frame and is used to drive the articulated ear plate 1 to slide reciprocatingly on the slide rail assembly 2.

4. A cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 1, characterized in that: The bearing drive module includes three groups of roller and wheel assemblies, and the roller and wheel assemblies are composed of roller mechanisms and wheel centering mechanisms. The three groups of roller mechanisms are arranged in a Y shape on the flip platform and are used to support and drive the workpiece to be measured to rotate; the three groups of wheel centering mechanisms are arranged in a one-to-one correspondence with the three groups of roller mechanisms and can reciprocate along the axes of the corresponding roller mechanisms. The three groups of wheel centering mechanisms are used to position the workpiece to be measured.

5. A cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 4, characterized in that: The roller mechanism is composed of rollers and roller drive motors, and the roller drive motor is arranged on the flip platform and is used to drive the rollers to rotate; the supporting wheel centering mechanism is composed of a slide rail assembly three, a fixed frame, a movable frame, a screw, a centering motor and a supporting wheel, the slide rail assembly three is fixedly arranged on both sides of the roller along the axial direction of the roller, the movable frame is slidably arranged on the slide rail assembly three, the fixed frame is arranged at the outer end of the slide rail assembly three, the centering motor is fixedly arranged on the fixed frame and is used to drive the screw arranged along the axial direction of the roller to rotate, the movable frame is fixedly connected to the screw nut screwed on the screw, and the supporting wheel is vertically rotatable on the movable frame.

6. The cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 1, characterized in that: The lifting drive mechanism is composed of an upper yoke mounting frame, a slide rail assembly four, a lifting cylinder, a guide sprocket, a driving sprocket and a chain. The slide rail assembly four is fixedly arranged on the upper yoke mounting frame in an oblique direction, the upper yoke is slidably arranged on the slide rail assembly four, the lifting cylinder is fixedly arranged at the bottom of the upper yoke mounting frame, the driving sprocket is rotatably arranged on the telescopic end of the lifting cylinder, the guide sprocket is rotatably arranged on the upper yoke mounting frame, one end of the chain is fixedly connected to the upper yoke, and the other end of the chain is fixedly connected to the middle section of the upper yoke mounting frame, and the middle section of the chain is wound around the guide sprocket and the driving sprocket.

7. A cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 6, characterized in that: The upper yoke mounting frame is fixed on the longitudinal movement mechanism, and the longitudinal movement mechanism is composed of a base, a slide rail assembly five, a transfer motor two, a gear two and a rack two. The rack two is fixed on the outer side of the transverse movement module along the longitudinal direction, the slide rail assembly five is fixed on both sides of the rack two and is arranged parallel to the rack two, the base is slidably mounted on the slide rail assembly five, the transfer motor two is fixed on the base and is used to drive the gear two to rotate, and the gear two is meshed with the rack two.

8. The cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 6, characterized in that: The magnetic suspension spray module is composed of a spray head assembly, a reflux hopper, a magnetic suspension stirring box, a spray pump, a stirring motor and a stirring blade. The spray head assembly is fixedly mounted on the upper magnetic yoke mounting frame and arranged toward the workpiece to be measured. The spray head assembly is connected to the spray pump through a spray pipeline. The spray pump is arranged in the magnetic suspension stirring box. The stirring motor is fixedly mounted on the magnetic suspension stirring box and is used to drive the stirring blade to stir the magnetic suspension in the magnetic suspension stirring box. The reflux hopper is arranged at the lower side end of the flip platform and is used to receive the magnetic suspension sprayed on the workpiece to be measured. The reflux hopper is connected to the magnetic suspension stirring box through a reflux pipeline.

9. A cylindrical workpiece flaw detector having a groove-shaped structure on the circumference according to claim 8, characterized in that: The magnetic suspension stirring box is provided with a liquid level sensor; the detection module adopts a CCD camera.

10. A method for using a cylindrical workpiece flaw detector having a groove-shaped structure on the peripheral surface according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Send the workpiece to be measured to the bearing drive module, and the bearing drive module positions the workpiece to be measured; Step 2: The transfer module moves the workpiece to be tested from the loading and unloading station to the flaw detection station; Step 3: Flip the platform to flip the workpiece to be tested from a horizontal state to an inclined state; Step 4: The magnetization module magnetizes the workpiece to be tested in an inclined state; Step 5: The bearing drive module drives the workpiece to be measured to rotate around its own axis; Step 6: The magnetic suspension spraying module sprays the magnetic suspension onto the circumferential surface of the workpiece to be measured in a rotating state. During this process, the magnetic suspension remaining in the groove-shaped structure on the circumferential surface of the workpiece to be measured flows out of the groove-shaped structure; Step 7: The bearing drive module drives the workpiece to be tested to rotate at multiple angles, and the detection module takes photos of the circumference of the workpiece to be tested at multiple angles, and determines whether it meets the quality requirements based on the fluorescent magnetic powder marks on the photos.

Images