Defect detection equipment and production line

Abstract

The present invention discloses a defect detection device and a production line, which belong to the technical field of honeycomb ceramic carriers. The acquisition detection unit of the defect detection device includes a central stage, a first detection module and a rotation detection module. The first detection module is arranged above the central stage and facing the central stage, and is used to detect the position information of the outer contour of the workpiece to be detected. The second detection module is configured to perform a circumferential detection around the workpiece to be detected with the XY plane moving mechanism, while rotating and always facing the side of the workpiece to be detected, so as to realize automatic and accurate detection of the side of the honeycomb ceramic carrier, reduce the labor intensity of workers, and facilitate the mass production of honeycomb ceramic carriers.

Description

Technical Field

[0001] The invention relates to the technical field of honeycomb ceramic carriers, and in particular to a defect detection device and a production line. Background Art

[0002] Honeycomb ceramic carriers are commonly used carriers for three-way catalysts in automobile exhaust pipes. Their cross-sections are honeycomb structures, and common shapes include round, oval, and racetrack. During the production and firing process of honeycomb ceramic carriers, due to uneven heating and other reasons, cracks and fractures may occur on the sides of the carriers, which makes them unable to enter the next production link normally. As emission requirements become more and more stringent, the diameter of honeycomb ceramic carriers is getting larger and larger, which means that the possibility of cracks on the sides is also increasing, and the cracks are relatively fine.

[0003] The common aperture of honeycomb ceramic carriers is in the range of 80 to 330 mm, and the side area is relatively large. However, honeycomb ceramic carrier manufacturers and coating manufacturers can usually only perform manual visual inspections. For side defect inspection, workers cannot quantify and record data on defects such as cracks on the side of the carrier, resulting in low inspection efficiency and a great burden on workers' eyes, which is not conducive to the mass production of honeycomb ceramic carriers.

[0004] Therefore, there is an urgent need to provide a defect detection device and a production line to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a defect detection device and a production line, which can automatically and accurately detect the side of the honeycomb ceramic carrier, reduce the labor intensity of workers, and facilitate the mass production of the honeycomb ceramic carrier.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] A defect detection device comprises a feeding unit, a collecting and detecting unit and a discharging unit, wherein the collecting and detecting unit comprises:

[0008] The central stage is used to place the workpiece to be inspected;

[0009] A first detection module, disposed above the central stage and facing the central stage, for detecting position information of the outer contour of the workpiece to be detected;

[0010] A rotation detection module, comprising a second detection module and an XY plane moving mechanism, wherein the second detection module is used to detect the side surface of the workpiece to be detected, the second detection module is rotatably arranged on the XY plane moving mechanism, and the XY plane moving mechanism is arranged on a mounting platform and performs a circular motion according to the detected position information of the outer contour;

[0011] The second detection module is configured to perform circumferential detection around the workpiece to be detected along with the XY plane moving mechanism, while rotating and always facing the side of the workpiece to be detected.

[0012] As an optional solution for the defect detection equipment, the second detection module includes a driving motor, a mounting base and a line scan camera. The fixed end of the driving motor is arranged at the driving end of the XY plane moving mechanism, and the rotating end of the driving motor is transmission-connected to the mounting base. The line scan camera is arranged on the mounting base in a vertical direction.

[0013] As an optional solution for the defect detection equipment, the second detection module also includes a fixed light source and a movable light source. A rotating screw is rotatably arranged on the mounting base. The fixed light source is fixed at the rear end of the mounting base. The movable light source is screwed on the rotating screw and can be raised and lowered relative to the fixed light source.

[0014] As an optional solution for the defect detection equipment, the feeding unit is arranged on the feeding side of the collection and detection unit, and the feeding unit includes a horizontal conveying mechanism and a lifting conveying mechanism. The height of the central loading platform is greater than the height of the horizontal conveying mechanism, and the lifting conveying mechanism is used to convey the workpiece to be inspected from the horizontal conveying mechanism to the central loading platform.

[0015] As an optional solution for the defect detection equipment, the horizontal conveying mechanism includes a first roller, a second roller and a plurality of conveyor belts wound around the first roller and the second roller. The plurality of conveyor belts are arranged at intervals along a direction perpendicular to the conveying direction, and an avoidance space is formed between two adjacent conveyor belts.

[0016] As an optional solution for the defect detection equipment, the lifting and conveying mechanism is located under the conveyor belt, and the lifting and conveying mechanism includes a horizontal pushing mechanism and a lifting claw assembly arranged on the horizontal pushing mechanism. The horizontal pushing mechanism moves back and forth along the conveying direction, and the lifting claw assembly can pass through the avoidance space and lift the workpiece to be inspected and convey it to the central loading platform.

[0017] As an optional solution for the defect detection equipment, a plurality of avoidance grooves are recessed on the central loading platform, and the plurality of avoidance grooves extend along the conveying direction, and the plurality of avoidance grooves are arranged in one-to-one correspondence with the plurality of avoidance spaces, so as to be used for extracting the lifting claw assembly from the central loading platform after it is lowered.

[0018] As an optional solution for the defect detection equipment, the horizontal conveying mechanism also includes a servo motor, which is transmission-connected to the second roller. The defect detection equipment also includes a position detection module, which includes a first detection sensor. The first detection sensor is arranged on the mounting platform, and the front end and the rear end of the workpiece to be inspected pass through the first detection sensor in sequence.

[0019] As an optional solution of the defect detection device, the position detection module also includes a second detection sensor, which is arranged on the mounting platform, and the emitting part of the second detection sensor is facing the axis of the central stage.

[0020] A production line comprises a safety shield and any one of the above-mentioned defect detection devices, wherein the outer cover of the defect detection device is provided with the safety shield, and the side wall of the safety shield is provided with an observation window.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The defect detection equipment provided by the present invention places the workpiece to be detected on the central stage, and arranges the first detection module above the central stage and facing the workpiece to be detected on the central stage, so as to detect the outer contour position information of the workpiece to be detected, and the XY plane moving mechanism drives the second detection module to surround the workpiece to be detected for detection, and the second detection module simultaneously rotates so as to always face the side of the workpiece to be detected, thereby realizing automatic and accurate detection of the side of the honeycomb ceramic carrier, reducing the labor intensity of workers, and facilitating the mass production of honeycomb ceramic carriers.

[0023] The production line provided by the present invention can realize automatic and accurate detection of the side surface of the honeycomb ceramic carrier, reduce the labor intensity of workers, and is conducive to the batch production of the honeycomb ceramic carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the assembly of a defect detection device in an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a second detection module in an embodiment of the present invention;

[0027] Figure 3It is a structural schematic diagram of a feeding unit in an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the central stage, the mounting platform and the position detection module in an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the structure of the safety shield in an embodiment of the present invention.

[0030] Reference numerals:

[0031] 100, feeding unit; 200, collecting and detecting unit; 300, discharging unit;

[0032] 1. Central loading platform; 11. Avoidance groove; 2. Workpiece to be detected; 3. First detection module; 4. Rotation detection module; 41. Second detection module; 411. First drive motor; 412. Mounting base; 413. Line scan camera; 414. Fixed light source; 415. Active light source; 416. Rotating screw; 42. XY plane moving mechanism; 5. Horizontal conveying mechanism; 51. First roller; 52. Second roller; 53. Conveyor belt; 54. Avoidance space; 6. Lifting and conveying mechanism; 61. Horizontal pushing mechanism; 62. Lifting claw assembly; 7. Position detection module; 71. First detection sensor; 72. Second detection sensor; 73. Mounting frame; 8. Mounting platform; 9. Safety shield; 91. Observation window; 92. Side sliding door; 93. Warning light; 94. Touch display screen. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive 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 limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] The common aperture of honeycomb ceramic carriers is in the range of 80mm-330mm, and the side area is relatively large. However, honeycomb ceramic carrier manufacturers and coating manufacturers can usually only perform manual visual inspection. For side defect detection, workers cannot quantify and record data on defects such as cracks on the side of the carrier. The detection efficiency is low, the burden on workers' eyes is extremely high, and most importantly, the reliability of crack detection cannot be guaranteed at all.

[0041] In order to automatically and accurately detect the side of the honeycomb ceramic carrier, reduce the labor intensity of workers, and facilitate the mass production of honeycomb ceramic carriers, this embodiment provides a defect detection device, which is combined with Figures 1 to 5 The specific contents of this embodiment are described in detail.

[0042] like Figure 1 As shown, the defect detection device includes a feeding unit 100 , a collection and detection unit 200 and a discharging unit 300 , and the collection and detection unit 200 includes a central stage 1 , a first detection module 3 and a rotation detection module 4 .

[0043] Among them, the central stage 1 is used to place the workpiece 2 to be detected; the first detection module 3 is arranged above the central stage 1 and facing the upper end surface of the central stage 1, and the workpiece 2 to be detected is placed on the upper end surface of the central stage 1. The first detection module 3 is used to detect the position information of the outer contour of the workpiece 2 to be detected, and send the position information of the outer contour of the workpiece 2 to be detected to the controller. The rotation detection module 4 includes a second detection module 41 and an XY plane moving mechanism 42. The second detection module 41 is used to detect the side of the workpiece 2 to be detected. The second detection module 41 is rotatably arranged on the XY plane moving mechanism 42. The XY plane moving mechanism 42 is arranged on the mounting platform 8. The controller can control the movement of the XY plane moving mechanism 42, and the XY plane moving mechanism 42 is made to move around the outer contour of the workpiece 2 to be detected according to the position information of the detected outer contour. The second detection module 41 is configured to perform a surrounding detection around the workpiece 2 to be detected with the XY plane moving mechanism 42, while rotating and always facing the side of the workpiece 2 to be detected. Specifically, the first detection module 3 is a surface array contour camera, and the second detection module 41 is a CIS (Contact Image Sensor Camera) line scan camera. The surface array contour camera accurately locates the position and contour of the honeycomb ceramic carrier, obtains the contour information of the honeycomb ceramic carrier, and converts it into actual coordinate axis values, and drives the CIS line scan camera to circle around the contour (the focal length of the CIS line scan camera is fixed at 15mm during operation) to complete image acquisition.

[0044] In short, the defect detection equipment provided by the present invention places the workpiece 2 to be inspected on the central stage 1, and sets the first detection module 3 above the central stage 1 and facing the workpiece 2 to be inspected located on the central stage 1, so as to detect the outer contour position information of the workpiece 2 to be inspected, and the XY plane moving mechanism 42 drives the second detection module 41 to perform surrounding detection around the workpiece 2 to be inspected, and the second detection module 41 rotates at the same time so as to always face the side of the workpiece 2 to be inspected, thereby realizing automatic and accurate detection of the side of the honeycomb ceramic carrier, reducing the labor intensity of workers, and facilitating the mass production of honeycomb ceramic carriers.

[0045] Furthermore, the second detection module 41 includes a first drive motor 411, a mounting base 412 and a line scan camera 413. The fixed end of the first drive motor 411 is arranged at the drive end of the XY plane moving mechanism 42, and the rotating end of the first drive motor 411 is transmission-connected to the mounting base 412. The line scan camera 413 is arranged vertically on the mounting base 412. Specifically, the mounting base 412 is arranged vertically, and the line scan camera 413 is detachably connected to the mounting base 412. The vertical arrangement of the line scan camera 413 can meet the requirements of detecting honeycomb ceramic carriers of different heights, thereby expanding the scope of application.

[0046] In special cases, the side cracks of the honeycomb ceramic carrier may not be captured well under normal lighting conditions, so in addition to the camera's own light source, a supplementary light source is also required.

[0047] Furthermore, if Figure 2 As shown, the second detection module 41 also includes a fixed light source 414 and a movable light source 415. A rotating screw 416 is rotatably provided on the mounting base 412. The fixed light source 414 is fixedly provided at the tail end of the mounting base 412. The movable light source 415 is screwed on the rotating screw 416 and can be lifted and lowered relative to the fixed light source 414. The spacing between the fixed light source 414 and the movable light source 415 is adjusted according to the different heights of the honeycomb ceramic carrier. The fixed light source 414 and the movable light source 415 are added to improve the clarity of the line scan camera 413. Furthermore, the fixed light source 414 is tilted upward so that the light is more fully irradiated on the workpiece 2 to be detected, making the cracks clearer and improving the detection accuracy.

[0048] Furthermore, if Figure 1 and Figure 3 As shown, the feeding unit 100 is arranged on the feeding side of the collection and detection unit 200, and the feeding unit 100 includes a horizontal conveying mechanism 5 and a lifting conveying mechanism 6. The height of the central loading platform 1 is greater than the height of the horizontal conveying mechanism 5, and the lifting conveying mechanism 6 is used to transport the workpiece 2 to be inspected from the horizontal conveying mechanism 5 to the central loading platform 1.

[0049] Furthermore, if Figure 3As shown, the horizontal conveying mechanism 5 includes a first roller 51, a second roller 52, and a plurality of conveyor belts 53 wound around the first roller 51 and the second roller 52. The plurality of conveyor belts 53 are arranged at intervals along a direction perpendicular to the conveying direction, and an escape space 54 is formed between two adjacent conveyor belts 53. Specifically, the horizontal conveying mechanism 5 also includes a roller frame, and the first roller 51 and the second roller 52 are rotatably arranged at both ends of the roller frame. A sensor is installed on the side of the roller frame close to the first roller 51 to detect whether the workpiece 2 to be detected is on the conveyor belt 53, and then control the first roller 51 and the second roller 52 to rotate. In this embodiment, the first roller 51 is a driven rotating member, and the second roller 52 is an active driving member. The second roller 52 is connected to the servo motor in a transmission manner.

[0050] Furthermore, if Figure 3 As shown, the lifting and conveying mechanism 6 is located below the conveyor belt 53. The lifting and conveying mechanism 6 includes a horizontal pushing mechanism 61 and a lifting claw assembly 62 arranged on the horizontal pushing mechanism 61. The horizontal pushing mechanism 61 moves back and forth along the conveying direction. The lifting claw assembly 62 can pass through the avoidance space 54 and lift the workpiece 2 to be inspected and convey it to the central loading platform 1. Specifically, the lifting claw assembly 62 includes a lifting claw, a telescopic cylinder and a mounting plate, and the lifting claw is driven by the telescopic cylinder to pass through the avoidance space 54. The horizontal pushing mechanism 61 includes a second driving motor and a threaded rod. A threaded hole is provided below the mounting plate. The threaded rod passes through the threaded hole. The threaded rod and the second driving motor are driven by belt transmission.

[0051] Furthermore, if Figure 4 As shown, a plurality of avoidance grooves 11 are recessed on the central stage 1, and the plurality of avoidance grooves 11 extend along the conveying direction, and the plurality of avoidance grooves 11 are arranged one by one with the plurality of avoidance spaces 54, so that the lifting claw assembly 62 can be drawn out from the central stage 1 after it is lowered. The lifting claw first lifts the workpiece 2 to be inspected and sends it to the top of the central stage 1. At this time, the plurality of lifting claws correspond to the plurality of avoidance grooves 11 from top to bottom, and then the lifting claw descends and falls into the avoidance grooves 11, and the workpiece 2 to be inspected is placed on the upper end surface of the central stage 1. After the loading of the workpiece 2 to be inspected is completed, the horizontal pushing mechanism 61 drives the lifting claw back to the initial position.

[0052] Furthermore, if Figure 1 and Figure 4As shown, the horizontal conveying mechanism 5 also includes a servo motor, which is in driving connection with the second roller 52. The defect detection device also includes a position detection module 7, which includes a first detection sensor 71. The first detection sensor 71 is arranged on the mounting platform 8, and the front end and the rear end of the workpiece 2 to be detected sequentially pass through the first detection sensor 71. The servo motor rotates at a set angle and speed by receiving a rising edge pulse, and calculates the time when the front end and the rear end of the workpiece 2 to be detected sequentially pass through the first detection sensor 71, thereby obtaining the diameter of the workpiece 2 to be detected.

[0053] Furthermore, if Figure 4 As shown, the position detection module 7 also includes a second detection sensor 72, which is arranged on the mounting platform 8, and the emission portion of the second detection sensor 72 is directly facing the axis of the central stage 1. When the front end of the workpiece 2 to be detected triggers the second detection sensor 72, the controller controls the workpiece 2 to be detected to move forward along the conveying direction by a distance equal to the radius length of the workpiece 2 to be detected, so as to ensure that the center of the workpiece 2 to be detected coincides with the center of the central stage 1.

[0054] The structure of the discharging unit 300 in this embodiment is the same as that of the feeding unit 100 , and the feeding unit 100 and the discharging unit 300 are symmetrically arranged on both sides of the collecting and detecting unit 200 .

[0055] This embodiment also provides a production line, which includes a safety shield 9 and the defect detection equipment mentioned above. The outer cover of the defect detection equipment is provided with a safety shield 9, and an observation window 91 is provided on the side wall of the safety shield 9. Organic tempered glass is installed on the three observation windows 91 on the front of the equipment to observe the detection of the carrier in the equipment, which are respectively located in front of the feeding unit 100, the collection and detection unit 200, and the discharge unit 300. The housing part of the collection and detection unit 200 area is provided with a side sliding door 92, which can be opened in some emergencies to take out the honeycomb ceramic carrier. The defect detection equipment is a closed detection mechanism as a whole, and the left and right sides are respectively the feed port and the discharge port for the workpiece 2 to be detected. An alarm light 93 and a touch display screen 94 are provided above the safety shield 9. The use of the touch display screen 94 frees up the space occupied by peripherals such as keyboards and mice, and improves the degree of integration of the equipment; the industrial computer chassis of industrial standards is adopted, which can meet the normal use of various external environments. The defect detection equipment can detect side defects of honeycomb ceramic carriers such as side cracks, side transverse cracks, side defects, skin protrusions, skin depressions, bubbles and other defects; taking side cracks as an example, it can detect cracks with a length of ≥2.0mm, a width of ≥0.03mm, and a depth of ≥0.1mm. It is suitable for honeycomb ceramic carriers with diameters of 80 to 330mm and heights of 45 to 180mm. The equipment only requires one worker to complete all operations and can detect 3-4 honeycomb ceramic carriers per minute.

[0056] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A defect detection device, comprising a feeding unit (100), a collection and detection unit (200) and a discharging unit (300), characterized in that: The acquisition and detection unit (200) comprises: A central loading platform (1) is used to place a workpiece (2) to be inspected; the feeding unit (100) is arranged on the feeding side of the collection and inspection unit (200); the feeding unit (100) comprises a horizontal conveying mechanism (5) and a lifting conveying mechanism (6); the height of the central loading platform (1) is greater than the height of the horizontal conveying mechanism (5); the lifting conveying mechanism (6) is used to convey the workpiece (2) to be inspected from the horizontal conveying mechanism (5) to the central loading platform (1); A first detection module (3), arranged above the central stage (1) and facing the central stage (1), and used for detecting position information of the outer contour of the workpiece (2) to be detected; A rotation detection module (4), comprising a second detection module (41) and an XY plane moving mechanism (42), wherein the second detection module (41) is used to detect the side surface of the workpiece (2) to be detected, the second detection module (41) is rotatably arranged on the XY plane moving mechanism (42), and the XY plane moving mechanism (42) is arranged on the mounting platform (8) and performs a circular motion according to the detected position information of the outer contour; The second detection module (41) is configured to carry out circumferential detection around the workpiece to be detected (2) along with the XY plane moving mechanism (42), while rotating on its own and always facing the side of the workpiece to be detected (2); The second detection module (41) comprises a driving motor (411), a mounting base (412), a line scan camera (413), a fixed light source (414) and a movable light source (415); the fixed end of the driving motor (411) is arranged at the driving end of the XY plane moving mechanism (42); the rotating end of the driving motor (411) is transmission-connected to the mounting base (412); the line scan camera (413) is arranged on the mounting base (412) in a vertical direction; a rotating screw (416) is rotatably arranged on the mounting base (412); the fixed light source (414) is fixedly arranged at the rear end of the mounting base (412); and the movable light source (415) is screwed onto the rotating screw (416) and can be raised and lowered relative to the fixed light source (414).

2. The defect detection device according to claim 1, characterized in that: The horizontal conveying mechanism (5) comprises a first rotating roller (51), a second rotating roller (52), and a plurality of conveying belts (53) wound around the first rotating roller (51) and the second rotating roller (52); the plurality of conveying belts (53) are arranged at intervals along a direction perpendicular to the conveying direction, and an escape space (54) is formed between two adjacent conveying belts (53).

3. The defect detection device according to claim 2, characterized in that: The lifting and conveying mechanism (6) is located below the conveying belt (53), and comprises a horizontal pushing mechanism (61) and a lifting claw assembly (62) arranged on the horizontal pushing mechanism (61). The horizontal pushing mechanism (61) moves back and forth along the conveying direction, and the lifting claw assembly (62) can pass through the avoidance space (54) and lift the workpiece (2) to be inspected and convey it to the central loading platform (1).

4. The defect detection device according to claim 3, characterized in that: The central loading platform (1) is provided with a plurality of avoidance grooves (11), the plurality of avoidance grooves (11) extending along the conveying direction, and the plurality of avoidance grooves (11) are arranged in one-to-one correspondence with the plurality of avoidance spaces (54), and are used for the lifting claw assembly (62) to be pulled out from the central loading platform (1) after it is lowered.

5. The defect detection device according to any one of claims 2 to 4, characterized in that: The horizontal conveying mechanism (5) further comprises a servo motor, the servo motor being in driving connection with the second rotating roller (52), the defect detection device further comprises a position detection module (7), the position detection module (7) comprising a first detection sensor (71), the first detection sensor (71) being arranged on the mounting platform (8), and the front end and the rear end of the workpiece (2) to be detected sequentially pass through the first detection sensor (71).

6. The defect detection device according to claim 5, characterized in that: The position detection module (7) further comprises a second detection sensor (72), wherein the second detection sensor (72) is arranged on the mounting platform (8), and an emitting portion of the second detection sensor (72) faces the axis of the central loading platform (1).

7. A production line, characterized in that: It comprises a safety shield (9) and the defect detection device according to any one of claims 1 to 6, wherein the outer cover of the defect detection device is provided with the safety shield (9), and an observation window (91) is provided on the side wall of the safety shield (9).

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