An appearance defect vision apparatus

Abstract

The application discloses an appearance defect visual equipment and belongs to the technical field of visual inspection. The appearance defect visual equipment comprises a synchronous belt conveyor, a first rack, a second rack and a material moving mechanical arm. A full-range visual inspection mechanism is installed on the first rack. The full-range visual inspection mechanism comprises a dividing table, a first tool plate, an upper visual inspection assembly, a lower visual inspection assembly and a side visual inspection assembly. A re-measuring and cleaning mechanism is installed on the second rack. Through the above mode, the application realizes the automatic detection of the material plate through the cooperative operation of multiple stations and multiple mechanisms. Compared with manual detection, the efficiency and precision of automatic detection are higher, and the automatic detection can meet the mass production demand. Meanwhile, the upper visual inspection assembly, the lower visual inspection assembly and the side visual inspection assembly are used in cooperation to realize the multi-angle appearance detection of the material plate. The full-range visual inspection mechanism can not only realize the comprehensive detection of the material plate, but also meet the demand of product and detection item diversity.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, and more specifically to a visual device for appearance defects. Background Technology

[0002] Visual inspection devices are systems that use machines to replace human eyes for automated, high-precision measurement and judgment. They overcome the physiological limitations of the human eye in terms of speed, accuracy, and stability, and are one of the core technologies for realizing intelligent manufacturing and industrial automation.

[0003] When inspecting the appearance of workpieces, it is necessary to detect defects such as oil stains, burrs, and cracks on the material appearance. Existing visual inspection devices can only distinguish between materials with defects and those without defects. Further judgment by humans is required. This not only fails to achieve accurate collection and discharge of qualified material plates (2), but also increases the labor intensity of manual labor.

[0004] Based on this, the present invention designs a visual device for appearance defects to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a visual device for appearance defects.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A visual defect detection device includes a synchronous belt conveyor (10), a first frame (11) and a second frame (12), the first frame (11) and the second frame (12) being located on the front and rear sides of the synchronous belt conveyor (10), respectively, and the synchronous belt conveyor (10) being used to convey material plates (2). The first frame (11) is equipped with an all-around vision inspection mechanism (3). The all-around vision inspection mechanism (3) includes an indexing table (31), a first tooling plate (32), an upper vision inspection component (33), a lower vision inspection component (34), and a side vision inspection component (35). The indexing table (31) is intermittently rotatable on the first frame (11). Multiple first tooling plates (32) adapted to the material plate (2) are fixedly installed on the indexing table (31) in a circumferential array. The upper vision inspection component (33), the lower vision inspection component (34), and the side vision inspection component (35) are sequentially installed on the first frame (11) along the circumference of the indexing table (31). A material transfer robotic arm (4) is fixedly installed on the first frame (11). The material transfer robotic arm (4) is located between the indexing table (31) and the synchronous belt conveyor (10). A material transfer clamp (5) is fixedly installed on the movable end of the material transfer robotic arm (4). A retesting and cleaning mechanism (6) is installed on the second frame (12). A marking and sorting mechanism (7) is also installed at the discharge end of the synchronous belt conveyor (10).

[0007] Furthermore, the retesting cleaning mechanism (6) includes a second tooling plate (61), an in-situ flipping component (62), a cleaning robotic arm (63), a mounting frame (64), and an external shielding blowing component (65). The second tooling plate (61) and the cleaning robotic arm (63) are fixedly installed on the upper end of the second frame (12). The second tooling plate (61) is adapted to the material plate (2). The in-situ flipping component (62) is installed on the upper end of the second frame (12) and located in front of the second tooling plate (61). The mounting frame (64) is fixedly installed on the movable end of the cleaning robotic arm (63). A high-efficiency cleaning component is installed on the mounting frame (64).

[0008] Furthermore, the in-situ flipping assembly (62) includes a lifting slide (621), a translation slide (622), a rotary cylinder (623), and a parallel gripper cylinder (624). The lifting slide (621) is fixedly installed at the front end of the second frame (12), the translation slide (622) is fixedly installed at the moving end of the lifting slide (621), the rotary cylinder (623) is fixedly installed at the moving end of the translation slide (622), and multiple parallel gripper cylinders (624) are fixedly installed at the output end of the rotary cylinder (623).

[0009] Furthermore, the high-efficiency cleaning component includes an outer shielding blower assembly (65) and an inner jet cleaning assembly (66), which are mounted on a mounting bracket (64), with the inner jet cleaning assembly (66) located inside the outer shielding blower assembly (65).

[0010] Furthermore, the external shielding blower assembly (65) includes an outer cylinder (651), ball bearings (652), suction holes (653), and a floating assembly (654). The outer cylinder (651) is mounted on the lower end of the mounting frame (64) via the floating assembly (654). A cavity is provided inside the outer cylinder (651), and a guide slope is provided on the outer edge of the lower end of the outer cylinder (651). Multiple ball bearings (652) are installed in a circumferential array on the outer side of the lower end face of the outer cylinder (651), and multiple suction holes (653) communicating with the cavity are opened in a circumferential array on the inner side of the lower end face of the outer cylinder (651).

[0011] Furthermore, the inner spray cleaning assembly (66) includes an outer cylinder (651), a brush (664), and a rotary drive assembly. The outer cylinder (651) is rotatably connected to the mounting bracket (64) and located inside the outer cylinder (651). The rotary drive assembly (667) is fixedly mounted on the mounting bracket (64). The output end of the rotary drive assembly (667) is drivenly connected to the inner cylinder (661). The brush (664) is fixedly mounted on the bottom of the inner cylinder (661).

[0012] Furthermore, the inner cylinder (661) is concentrically provided with a first inner cavity (662) and a second inner cavity (663). The bottom of the inner cylinder (661) is provided with a plurality of first liquid outlet holes (665) communicating with the first inner cavity (662) in a circumferential array. The bottom of the inner cylinder (661) is also provided with a second liquid outlet hole (666) communicating with the second inner cavity (663). The upper ends of the first inner cavity (662) and the second inner cavity (663) are respectively connected to the first rotary joint (668) and the second rotary joint (669).

[0013] Furthermore, the second inner cavity (653) of the suction hole of the outer cylinder (651) and the liquid outlet end of the first liquid outlet hole (665) of the inner cylinder (661) are both inclined towards the axis of the inner cylinder (661).

[0014] Compared with the prior art, the present invention has the following advantages: The present invention achieves automated inspection of the material plate (2) through the collaborative operation of multiple workstations and multiple mechanisms. Compared with manual inspection, the efficiency and accuracy of automated inspection are higher, which can meet the needs of mass production. At the same time, by using the upper vision inspection component (33), the lower vision inspection component (34) and the side vision inspection component (35) together, the appearance inspection of the material plate (2) from multiple perspectives can be achieved. This not only enables comprehensive inspection of the material plate (2), but also meets the needs of product and inspection item diversity. Furthermore, the re-inspection and cleaning mechanism (6) can accurately clean the material plate (2) with appearance defects and send the cleaned material plate (2) back for re-inspection, thereby ensuring that qualified material plates (2) are accurately collected and discharged, further ensuring the quality of the output. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a visual defect detection device according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a visual defect detection device according to the present invention. Figure 2 ; Figure 3 The structural three-dimensional representation of an appearance defect visual device according to the present invention Figure 1 ; Figure 4 The structural three-dimensional representation of the retesting and cleaning mechanism of the present invention. Figure 1 ; Figure 5 The structural three-dimensional representation of the retesting and cleaning mechanism of the present invention. Figure 2 ; Figure 6 This is a front half-sectional plan view of the outer cylinder and inner cylinder of the present invention; Figure 7 This is a frontal half-sectional perspective view of the outer cylinder and inner cylinder of the present invention.

[0017] The labels in the diagram represent: 10. Synchronous belt conveyor; 11. First frame; 12. Second frame; 2. Material plate; 3. All-around vision inspection mechanism; 31. Indexing table; 32. First tooling plate; 33. Upper vision inspection component; 331. Upper three-axis linear module; 332. First vision module; 34. Lower vision inspection component; 341. Lower three-axis linear module; 342. Second vision module; 35. Side vision inspection component; 351. Translation linear module; 352. Third vision module; 4. Material transfer robotic arm; 5. Material transfer fixture; 6. Re-testing and cleaning mechanism; 61. Second tooling plate; 62. In-situ flipping component; 621. Lifting slide; 622. 623. Translation slide; 624. Rotary cylinder; 625. Parallel gripper cylinder; 63. Cleaning robotic arm; 64. Mounting bracket; 65. External shielding blower assembly; 651. Outer cylinder; 652. Ball bearing; 653. Suction port; 654. Floating assembly; 66. Internal spray cleaning assembly; 661. Inner cylinder; 662. First inner cavity; 663. Second inner cavity; 664. Brush; 665. First liquid outlet; 666. Second liquid outlet; 667. Rotary drive assembly; 668. First rotary joint; 669. Second rotary joint; 7. Marking and sorting mechanism; 71. Laser marking machine; 72. Defective product pusher cylinder; 73. Defective product box. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0019] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0020] In some embodiments, please refer to the accompanying drawings. Figures 1-7A visual defect detection device includes a synchronous belt conveyor (10), a first frame (11) and a second frame (12), the first frame (11) and the second frame (12) being located on the front and rear sides of the synchronous belt conveyor (10) respectively, and the synchronous belt conveyor (10) being used to convey material plates (2). The first frame (11) is equipped with an all-around vision inspection mechanism (3). The all-around vision inspection mechanism (3) includes an indexing table (31), a first tooling plate (32), an upper vision inspection component (33), a lower vision inspection component (34), and a side vision inspection component (35). The indexing table (31) is intermittently rotatable on the first frame (11). A cam divider is fixedly installed at the lower end of the first frame (11). The output end of the cam divider is driven and connected to the indexing table (31). Multiple first tooling plates (32) adapted to the material plate (2) are fixedly installed in a circular array on the indexing table (31). The upper vision inspection component (33), the lower vision inspection component (34), and the side vision inspection component (35) are sequentially installed on the first frame (11) along the circumference of the indexing table (31). A material transfer robotic arm (4) is fixedly installed on the first frame (11). The material transfer robotic arm (4) is located between the indexing table (31) and the synchronous belt conveyor (10). A material transfer clamp (5) is fixedly installed on the movable end of the material transfer robotic arm (4). A retesting and cleaning mechanism (6) is installed on the second frame (12). A marking and sorting mechanism (7) is also installed at the discharge end of the synchronous belt conveyor (10).

[0021] In this embodiment, the material transfer fixture (5) is a vacuum suction cup fixture.

[0022] In this invention, the material transfer robot arm (4) can control the movement of the material plate (2) through the material transfer clamp (5), so that the material plate (2) can rotate between the first tooling plate (32), the synchronous belt conveyor (10), and the retesting and cleaning mechanism (6); the synchronous belt conveyor (10) drives the material plate (2) to be inspected to be transported to the right, and the material transfer robot arm (4) grabs the material plate (2) on the synchronous belt conveyor (10) and transfers it to the first tooling plate (32) on the indexing table (31) through the material transfer clamp (5), so that the upper vision inspection component (33), the lower vision inspection component (34), and the side vision inspection component (35) sequentially perform visual inspection on the front, back, and side of the material plate (2) to observe the material plate (2). 2) Are there any appearance defects such as cracks or dirt? If the material plate (2) does not have any appearance defects, then put the material plate (2) back on the synchronous belt conveyor (10). If the material plate (2) has appearance defects, then place the material plate (2) on the retesting and cleaning mechanism (6) to clean the appearance defects of the material plate (2), and then put the cleaned material plate (2) back on the first tooling plate (32) for retesting. If the appearance defects of the material plate (2) disappear, then put the material plate (2) back on the synchronous belt conveyor (10). If the material plate (2) still has appearance defects, then send the material plate (2) to wait for manual re-inspection. The qualified material plate (2) is moved to the underside of the marking and sorting mechanism (7) and sorted again by the material plate (2). This invention achieves automated inspection of the material plate (2) through the collaborative operation of multiple workstations and mechanisms. Compared with manual inspection, automated inspection is more efficient and accurate, and can meet the needs of mass production. At the same time, by using the upper vision inspection component (33), the lower vision inspection component (34) and the side vision inspection component (35) together, the appearance inspection of the material plate (2) from multiple perspectives can be achieved. This not only enables comprehensive inspection of the material plate (2), but also meets the needs of diverse products and inspection items. Furthermore, the re-inspection and cleaning mechanism (6) can accurately clean the material plate (2) with appearance defects and send the cleaned material plate (2) back for re-inspection, thereby ensuring that qualified material plates (2) are accurately collected and discharged, further ensuring the quality of the output.

[0023] The upper vision detection component (33) includes an upper three-axis linear module (331) and a first vision module (332). The upper three-axis linear module (331) is fixedly installed on the upper end of the first frame (11) and mounted on the upper side of the indexing table (31). The first vision module (332) is fixedly installed on the moving end of the upper three-axis linear module (331), and the detection end of the first vision module (332) is set vertically downward. The lower vision detection component (34) includes a lower three-axis linear module (341) and a second vision module (342). The lower three-axis linear module (341) is fixedly installed at the lower end of the first frame (11), and the second vision module (342) is fixedly installed at the moving end of the lower three-axis linear module (341). The second vision module (342) is set vertically, and the indexing table (31) has a through slot for avoiding the second vision module (342). The side vision detection component (35) includes a translational linear module (351) and a third vision module (352). The translational linear module (351) is fixedly installed on the upper end of the first frame (11) and mounted on the upper side of the indexing table (31). There are two translational linear modules (351) and they are symmetrically distributed on the front and rear sides of the indexing table (31). Each of the two translational linear modules (351) has a third vision module (352) fixedly installed at its moving end. The third vision modules (352) on both sides are horizontally distributed and their detection ends are set opposite each other.

[0024] In this invention, the upper three-axis linear module (331) and the first vision module (332) work together to perform visual inspection on the front of the material plate (2), the lower three-axis linear module (341) and the second vision module (342) work together to perform visual inspection on the back of the material plate (2), and the translational linear module (351) and the third vision module (352) work together to perform visual inspection on the side of the material plate (2). The three inspection methods are distributed at different workstations to achieve automated inspection of the material plate (2).

[0025] The retest cleaning mechanism (6) includes a second tooling plate (61), an in-situ flipping component (62), a cleaning robotic arm (63), a mounting frame (64), and an external shielding blowing component (65). The second tooling plate (61) and the cleaning robotic arm (63) are fixedly installed on the upper end of the second frame (12). The second tooling plate (61) is adapted to the material plate (2). The in-situ flipping component (62) is installed on the upper end of the second frame (12) and located in front of the second tooling plate (61). The mounting frame (64) is fixedly installed on the movable end of the cleaning robotic arm (63). A high-efficiency cleaning component is installed on the mounting frame (64).

[0026] The in-situ flipping assembly (62) includes a lifting slide (621), a translation slide (622), a rotary cylinder (623), and a parallel gripper cylinder (624). The lifting slide (621) is fixedly installed at the front end of the second frame (12), the translation slide (622) is fixedly installed at the moving end of the lifting slide (621), the rotary cylinder (623) is fixedly installed at the moving end of the translation slide (622), and multiple parallel gripper cylinders (624) are fixedly installed at the output end of the rotary cylinder (623). After the parallel gripper cylinder (624) is pushed towards the material plate (2) by the translation slide (622), the material plate (2) is clamped and fixed by the parallel gripper cylinder (624). Then, the material plate (2) is lifted by the lifting slide (621), and the material plate (2) can be rotated 180 degrees by the rotating cylinder (623). Then, the lifting slide (621) moves down to reset, the parallel gripper cylinder (624) releases the material plate (2), and the translation slide (622) resets again, so as to achieve the effect of in-situ rotation of the material plate (2).

[0027] The high-efficiency cleaning component includes an outer shielding blower assembly (65) and an inner spray cleaning assembly (66), which are mounted on a mounting bracket (64), and the inner spray cleaning assembly (66) is located inside the outer shielding blower assembly (65). The external shielding blower assembly (65) includes an outer cylinder (651), ball bearings (652), suction holes (653), and a floating assembly (654). The outer cylinder (651) is mounted on the lower end of the mounting frame (64) via the floating assembly (654). A cavity is provided inside the outer cylinder (651), and the cavity is connected to a suction machine (not shown in the figure) via a pipe. A guide slope is provided on the outer edge of the lower end of the outer cylinder (651). Multiple ball bearings (652) are installed in a circumferential array on the outer side of the lower end face of the outer cylinder (651), and multiple suction holes (653) communicating with the cavity are opened in a circumferential array on the inner side of the lower end face of the outer cylinder (651). The internal spray cleaning assembly (66) includes an outer cylinder (651), a brush (664), and a rotary drive assembly. The outer cylinder (651) is rotatably connected to the mounting bracket (64) and located inside the outer cylinder (651). The rotary drive assembly (667) is fixedly mounted on the mounting bracket (64). The output end of the rotary drive assembly (667) is drivenly connected to the inner cylinder (661). The brush (664) is fixedly mounted at the bottom of the inner cylinder (661). A first inner cavity (662) and a second inner cavity (664) are concentrically arranged inside the inner cylinder (661). 663), the bottom of the inner cylinder (661) is provided with a plurality of first liquid outlet holes (665) that communicate with the first inner cavity (662) in a circumferential array, and the bottom of the inner cylinder (661) is also provided with a second liquid outlet hole (666) that communicates with the second inner cavity (663); the upper ends of the first inner cavity (662) and the second inner cavity (663) are respectively connected to the first rotary joint (668) and the second rotary joint (669), and the first rotary joint (668) and the second rotary joint (669) are respectively connected to a water pump (not shown in the figure) through pipelines.

[0028] In this embodiment, the rotation drive assembly (667) adopts a hollow rotation platform.

[0029] In this embodiment, the floating component (654) adopts a spring slide rod floating structure.

[0030] In this invention, a material plate (2) with appearance defects discovered during initial inspection is transferred to a second tooling plate (61) by a material transfer robotic arm (4) and a material transfer fixture (5). A cleaning robotic arm (63) drives a mounting frame (64) to move, causing the outer cylinder (651) to be pressed against the material plate (2) under the action of a floating component (654), so that the brush (664) of the inner cylinder (661) comes into contact with the surface of the material plate (2). Subsequently, a rotation drive component (667) drives the inner cylinder (661) to rotate, so that the brush (664) cleans the appearance defect area of ​​the material plate (2). During the brushing process, clean water enters the first inner cavity (662) through the first rotary joint (668) and is then sprayed out from the first liquid outlet (665). Meanwhile, cleaning liquid enters the second inner cavity (663) through the second rotary joint (669) and is then sprayed out from the second liquid outlet (666). The clean water and cleaning liquid collide and fuse on the surface of the material plate (2) to significantly increase the cleaning effect on the surface of the material plate (2). Finally, the wastewater is drawn away from the suction hole (653), thereby achieving an automatic cleaning effect on the surface defects of the material plate (2) and eliminating the occurrence of surface defects such as dirt.

[0031] In this embodiment, the second inner cavity (653) of the suction hole of the outer cylinder (651) and the liquid outlet end of the first liquid outlet hole (665) of the inner cylinder (661) are both inclined towards the axis of the inner cylinder (661), so that the wastewater after cleaning will flow towards the edge of the inner cylinder (661) and be easily drawn away by the second inner cavity (653) of the suction hole.

[0032] The marking and sorting mechanism (7) includes a laser marking machine (71), a defective product push cylinder (72), and a defective product box (73). The laser marking machine (71) is mounted on the upper side of the synchronous belt conveyor (10). A QR code recognition camera is also installed on the laser marking machine (71). The defective product push cylinder (72) is fixedly installed on the side of the frame of the synchronous belt conveyor (10). The defective product box (73) is located on the side of the synchronous belt conveyor (10) and opposite to the defective product push cylinder (72). The QR code recognition camera on the laser marking machine (71) reads the identification code on the material plate (2). The laser marking machine (71) then laser marks the qualified material plate (2), and the defective product push cylinder (72) pushes the unqualified material plate (2) into the defective product box (73) to realize the automatic sorting of qualified and defective parts.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A visual defect detection device, comprising a synchronous belt conveyor (10), a first frame (11), and a second frame (12), wherein the first frame (11) and the second frame (12) are respectively located on the front and rear sides of the synchronous belt conveyor (10), the synchronous belt conveyor (10) being used to convey a material plate (2), characterized in that: The first frame (11) is equipped with an all-around vision inspection mechanism (3). The all-around vision inspection mechanism (3) includes an indexing table (31), a first tooling plate (32), an upper vision inspection component (33), a lower vision inspection component (34), and a side vision inspection component (35). The indexing table (31) is intermittently rotatable on the first frame (11). Multiple first tooling plates (32) adapted to the material plate (2) are fixedly installed on the indexing table (31) in a circumferential array. The upper vision inspection component (33), the lower vision inspection component (34), and the side vision inspection component (35) are sequentially installed on the first frame (11) along the circumference of the indexing table (31). A material transfer robotic arm (4) is fixedly installed on the first frame (11). The material transfer robotic arm (4) is located between the indexing table (31) and the synchronous belt conveyor (10). A material transfer clamp (5) is fixedly installed on the movable end of the material transfer robotic arm (4). A retesting and cleaning mechanism (6) is installed on the second frame (12). A marking and sorting mechanism (7) is also installed at the discharge end of the synchronous belt conveyor (10).

2. The appearance defect vision device according to claim 1, characterized in that, The retest cleaning mechanism (6) includes a second tooling plate (61), an in-situ flipping component (62), a cleaning robotic arm (63), a mounting frame (64), and an external shielding blowing component (65). The second tooling plate (61) and the cleaning robotic arm (63) are fixedly installed on the upper end of the second frame (12). The second tooling plate (61) is adapted to the material plate (2). The in-situ flipping component (62) is installed on the upper end of the second frame (12) and located in front of the second tooling plate (61). The mounting frame (64) is fixedly installed on the movable end of the cleaning robotic arm (63). A high-efficiency cleaning component is installed on the mounting frame (64).

3. The appearance defect vision device according to claim 2, characterized in that, The in-situ flipping assembly (62) includes a lifting slide (621), a translation slide (622), a rotary cylinder (623), and a parallel gripper cylinder (624). The lifting slide (621) is fixedly installed at the front end of the second frame (12), the translation slide (622) is fixedly installed at the moving end of the lifting slide (621), the rotary cylinder (623) is fixedly installed at the moving end of the translation slide (622), and multiple parallel gripper cylinders (624) are fixedly installed at the output end of the rotary cylinder (623).

4. The appearance defect vision device according to claim 3, characterized in that, The high-efficiency cleaning component includes an outer shielding blower assembly (65) and an inner spray cleaning assembly (66), which are mounted on a mounting bracket (64), with the inner spray cleaning assembly (66) located inside the outer shielding blower assembly (65).

5. The appearance defect vision device according to claim 4, characterized in that, The external shielding blower assembly (65) includes an outer cylinder (651), ball bearings (652), suction holes (653), and a floating assembly (654). The outer cylinder (651) is mounted on the lower end of the mounting frame (64) via the floating assembly (654). A cavity is provided inside the outer cylinder (651), and a guide slope is provided on the outer edge of the lower end of the outer cylinder (651). Multiple ball bearings (652) are installed in a circumferential array on the outer side of the lower end face of the outer cylinder (651), and multiple suction holes (653) communicating with the cavity are opened in a circumferential array on the inner side of the lower end face of the outer cylinder (651).

6. The appearance defect vision device according to claim 5, characterized in that, The inner spray cleaning assembly (66) includes an outer cylinder (651), a brush (664) and a rotary drive assembly. The outer cylinder (651) is rotatably connected to the mounting bracket (64) and located inside the outer cylinder (651). The rotary drive assembly (667) is fixedly installed on the mounting bracket (64). The output end of the rotary drive assembly (667) is drivenly connected to the inner cylinder (661). The brush (664) is fixedly installed at the bottom of the inner cylinder (661).

7. The appearance defect vision device according to claim 6, characterized in that, The inner cylinder (661) is concentrically provided with a first inner cavity (662) and a second inner cavity (663). The bottom of the inner cylinder (661) is provided with a plurality of first liquid outlet holes (665) communicating with the first inner cavity (662) in a circumferential array. The bottom of the inner cylinder (661) is also provided with a second liquid outlet hole (666) communicating with the second inner cavity (663). The upper ends of the first inner cavity (662) and the second inner cavity (663) are respectively connected to the first rotary joint (668) and the second rotary joint (669).

8. The appearance defect vision device according to claim 7, characterized in that, The second inner cavity (653) of the suction hole of the outer cylinder (651) and the liquid outlet end of the first liquid outlet hole (665) of the inner cylinder (661) are both inclined towards the axis of the inner cylinder (661).

Images