An industrial vision-based appearance inspection device for sheet metal processing

Abstract

This invention relates to the field of sheet metal manufacturing, specifically disclosing an appearance inspection device for sheet metal processing based on industrial vision. The device includes a housing with an industrial camera mounted on its lower side wall. A hollow rotating column is located in the center of the housing's inner cavity, and a drive mechanism for lifting and rotating the sheet metal part is mounted on the side of the hollow rotating column. It also includes a fixture switching assembly. This appearance inspection device for sheet metal processing, based on industrial vision, allows the sheet metal part to rotate as it descends, switching between upper and lower fixtures upon reaching the bottom. This enables highly efficient appearance inspection of the sheet metal part. Furthermore, because the sheet metal part rotates continuously, the viewing angle between the industrial camera and the sheet metal part constantly changes, avoiding blind spots.

Description

Technical Field

[0001] This invention relates to the field of sheet metal production, and more particularly to an appearance inspection device for sheet metal processing based on industrial vision. Background Technology

[0002] In the sheet metal processing, appearance quality directly affects the assembly accuracy and performance of the product. Since stamping, bending and other processes can easily cause defects such as scratches, dents, warping or surface corrosion, traditional manual visual inspection has problems such as low efficiency, inconsistent standards and high risk of missed inspections. Especially in precision fields such as automobile manufacturing and electronic equipment housings, minor appearance defects may cause structural failures or sealing problems.

[0003] Existing inspection technologies generally employ single-station fixed vision inspection systems, which require physical positioning of sheet metal parts using mechanical fixtures and image acquisition and defect analysis on each side. For workpieces with irregular geometric shapes or bending structures, this method requires repeated adjustments to the clamping posture, resulting in long inspection times for a single piece. Secondly, the coordinated movement between the fixing device and the flipping mechanism increases system complexity and the frequency of manual intervention. More importantly, single-view imaging is prone to creating blind spots. These technical defects restrict production line cycle time, and the proportion of manual re-inspection remains high, failing to meet the requirements of intelligent manufacturing for full-process automation.

[0004] Therefore, it is necessary to propose an appearance inspection device for sheet metal parts processing based on industrial vision to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art. The present invention proposes an appearance inspection device for sheet metal parts processing based on industrial vision, which solves the problem of low inspection efficiency of sheet metal parts in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An appearance inspection device for sheet metal parts processing based on industrial vision includes a housing, and an industrial camera is provided on the lower side wall of the housing.

[0008] A hollow rotating column is provided in the middle of the inner cavity of the outer shell. A drive mechanism for driving the sheet metal parts to lift and rotate is provided on the side of the hollow rotating column. The drive mechanism includes a support frame provided on the upper side of the hollow rotating column. A lead screw is rotatably provided on the upper end of the support frame. A second drive source for driving the lead screw to rotate is provided on the top of the lead screw. A lifting frame is threaded to the outside of the lead screw. The lower end of the lifting frame extends to the bottom of the support frame and is rotatably provided with a rotating rod. A spiral groove is provided on the side wall of the rotating rod. A guide frame corresponding to the rotating rod is provided on the side wall of the hollow rotating column. One end of the guide frame is movably sleeved with the rotating rod, and a guide block that movably cooperates with the spiral groove is provided on one end of the guide frame.

[0009] It also includes a clamp switching assembly, which includes a first clamp frame disposed at the bottom of the rotating rod, an upper clamp component disposed at the bottom of the first clamp frame, a bracket corresponding to the first clamp frame disposed on the lower side wall of the hollow rotating column, a lower clamp component disposed at the upper end of the bracket for automatically fixing one end of the sheet metal part, a second rotating shaft disposed on the inner side of the bracket for driving the lower clamp component to rotate, a lower rotating shaft corresponding to the bracket disposed on the lower inner side of the hollow rotating column, an upper rotating shaft corresponding to the lower rotating shaft disposed on the upper end, and the lower rotating shaft and the upper rotating shaft are rotatably connected by a one-way bearing. Corresponding synchronous pulleys are disposed on the upper end of the lead screw, the upper end of the upper rotating shaft, the lower end of the lower rotating shaft, and the second rotating shaft, and synchronous belts are disposed on the two corresponding synchronous pulleys.

[0010] Preferably, the upper clamping component includes fixed seats disposed at both ends of the bottom of the first clamping frame. Upper clamping plates are rotatably disposed on the sides of both fixed seats. The lower side wall of one upper clamping plate is provided with an upper insert block for interlocking with a hole on the sheet metal part, and the size of the upper insert block is smaller than the size of the hole on the sheet metal part. A fixed plate is fixed to the upper side wall of one upper clamping plate, and a slot is provided at one end of the fixed plate. A floating plate located above the fixed plate is movably connected to the upper side wall of the other upper clamping plate. A locking block for interlocking with the slot is provided at the bottom of one end of the floating plate, and the locking block has a trapezoidal or triangular cross section. A protruding plate located above the floating plate is provided on the upper side wall of the upper clamping plate corresponding to the floating plate. A first elastic structure is provided between the protruding plate and the floating plate.

[0011] Preferably, the upper clamping component is provided with a self-reversing concealing assembly, the self-reversing concealing assembly includes a blind hole provided on the side of the fixed base, the end of the upper clamping plate is provided with a first rotating shaft rotatably connected to the blind hole, and a torsion spring is provided between one end of the first rotating shaft and the inner wall of the blind hole, and a traction arm corresponding to the sheet metal part is provided on the side of the floating plate, and the lower end of the traction arm is lower than the fixed plate.

[0012] Preferably, the upper end of the spiral groove is provided with a vertical groove, and the inner wall of the vertical groove smoothly transitions with the inner wall of the spiral groove.

[0013] Preferably, the lower clamping component includes a second clamping frame disposed on the upper end of the second rotating shaft. A pair of lower clamping plates are disposed on the upper end of the second clamping frame. A clamping block is movably connected to the inner side wall of one of the lower clamping plates. The upper end of the clamping block is inclined and is used to insert and cooperate with holes on the sheet metal part. A second elastic structure is disposed between one end of the clamping block and the inner side wall of the corresponding lower clamping plate.

[0014] Preferably, the clamping block is provided with a manual pull rod extending to the outside of the lower clamping plate on the side near the second elastic structure.

[0015] Preferably, the lower end of the traction arm is rotatably provided with a roller, and the roller is used to roll and engage with the edge of the sheet metal part.

[0016] Preferably, the hollow rotating column is rotatably disposed in the middle of the inner cavity of the outer shell, and the top of the outer shell is provided with a first driving source for driving the hollow rotating column to rotate;

[0017] The drive mechanism and the clamp switching assembly are evenly arranged around the circumferential side of the hollow rotating column.

[0018] Preferably, a loading / unloading window is provided on one side of the outer casing.

[0019] Preferably, a light source corresponding to an industrial camera and used to blow hot air onto sheet metal parts is provided through the lower side of the housing.

[0020] Compared with the prior art, the beneficial effects of the present invention include:

[0021] This industrial vision-based sheet metal parts processing appearance inspection device, through a set drive mechanism and a fixture switching component, allows the sheet metal parts to rotate as they descend. Upon reaching the bottom, the upper and lower fixture components are switched, enabling highly efficient appearance inspection of sheet metal parts. Moreover, as the sheet metal parts rotate continuously, the viewing angle between the industrial camera and the sheet metal parts constantly changes, avoiding the generation of blind spots. The upper fixture component automatically opens and hides when pressed by one end of the sheet metal parts, while the lower fixture component automatically fixes the sheet metal parts when pressed by the other end, changing the fixed position. After the fixtures are switched, the drive mechanism reverses and resets, while the sheet metal parts can continue to rotate. In conjunction with the industrial camera, the remaining parts obscured by the upper fixture component can be monitored. The device has a compact structure, is easy to use, and improves efficiency. Attached Figure Description

[0022] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0023] Figure 1 The schematic diagram shows the overall structure of the present invention;

[0024] Figure 2 The schematic diagram shows the internal structure of the outer casing of the present invention;

[0025] Figure 3 The schematic diagram shows the structure of the protective shell and hollow rotating column of the present invention in a disassembled state;

[0026] Figure 4 The schematic diagram shows a partial cross-sectional view of the hollow rotating column in this invention;

[0027] Figure 5 The schematic diagram shows the structure of the lower and upper rotating shafts of the present invention in their disassembled state;

[0028] Figure 6 The schematic diagram shows the structure of the present invention with the rotating shaft and lead screw in the engagement state;

[0029] Figure 7 The schematic diagram shows the structure of the upper end of the rotating rod and the guide frame of the present invention in a disassembled state;

[0030] Figure 8 The schematic diagram shows the structure of the two upper clamping plates of the present invention in a vertically joined state;

[0031] Figure 9 The invention is illustrated schematically. Figure 8 A schematic diagram of the structure in its disassembled state.

[0032] Figure 10 The invention is illustrated schematically. Figure 8 A schematic diagram of the structure in cross-sectional view based on the foundation;

[0033] Figure 11 The schematic diagram shows a cross-sectional view of the bracket of the present invention.

[0034] Labels in the diagram: 1. Outer shell; 2. Loading / unloading window; 3. Industrial camera; 4. Light source; 5. First drive source; 6. Hollow rotating column; 7. Protective shell; 8. Bracket; 9. Second drive source; 10. Rotating rod; 11. First clamp frame; 12. Guide frame; 13. Support frame; 14. Lead screw; 15. Lower rotating shaft; 16. Upper rotating shaft; 17. Second clamp frame; 18. Synchronous belt; 19. Synchronous pulley; 20. Lifting frame ; 21. Upper clamping plate; 22. Spiral groove; 23. Guide block; 24. Vertical groove; 25. Fixed seat; 26. Floating plate; 27. Fixed plate; 28. Traction arm; 29. ​​Torsion spring; 30. First rotating shaft; 31. Slot; 32. Protruding plate; 33. First elastic structure; 34. Manual pull rod; 35. Clamping block; 36. Second rotating shaft; 37. Lower clamping plate; 38. Second elastic structure; 39. Clamping block; 40. Upper inserting block. Detailed Implementation

[0035] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0036] According to one embodiment of the present invention, Figures 1-11 As shown.

[0037] like Figures 1-7 As shown, an appearance inspection device for sheet metal processing based on industrial vision includes a housing 1. An industrial camera 3 is installed on the lower side wall of the housing 1. The industrial camera 3 is a conventional technology and will not be described in detail. A hollow rotating column 6 is installed in the middle of the inner cavity of the housing 1. A drive mechanism for driving the sheet metal parts to lift and rotate is installed on the side of the hollow rotating column 6. The drive mechanism includes a support frame 13 installed on the upper side of the hollow rotating column 6. A lead screw 14 is rotatably installed on the upper end of the support frame 13. A second drive source 9 for driving the lead screw 14 to rotate is installed on the top of the lead screw 14. The second drive source 9 is preferably a geared motor. A lifting frame 20 is threaded to the outside of the lead screw 14. The lower end of the lifting frame 20 extends to the bottom of the support frame 13 and is rotatably installed with a rotating... The rod 10 and the extension of the lifting frame 20 and the support frame 13 are in a movable guide fit. The lifting frame 20 will not rotate with the lead screw 14. The side wall of the rotating rod 10 is provided with a spiral groove 22. The side wall of the hollow rotating column 6 is provided with a guide frame 12 corresponding to the rotating rod 10. One end of the guide frame 12 is movably sleeved with the rotating rod 10. The inner side of the sleeve of the guide frame 12 and the rotating rod 10 is provided with a guide block 23 that is movably fitted with the spiral groove 22. In order to protect the drive mechanism, a protective shell 7 is provided on the upper side of the hollow rotating column 6. The lower end of the rotating rod 10 extends to the bottom of the protective shell 7. The second drive source 9 is installed on the top of the protective shell 7. Moreover, a maintenance port can be provided on the protective shell 7 for periodically lubricating the lead screw 14 and the rotating rod 10.

[0038] like Figures 3-6 , Figures 8-10As shown, in order to change the fixed position of the sheet metal part, a first clamping frame 11 is provided at the bottom of the rotating rod 10. An upper clamping component is provided at the bottom of the first clamping frame 11. The upper clamping component is used to fix the upper end of the sheet metal part, and the upper clamping component can be automatically unlocked and hidden under pressure. As a preferred embodiment, the upper clamping component includes a fixing seat 25 provided at both ends of the bottom of the first clamping frame 11. An upper clamping plate 21 is rotatably provided on the side of both ends of the fixing seat 25. When the two upper clamping plates 21 are in the vertical state, the distance between the upper clamping plates 21 is adapted to the thickness of the sheet metal part, which can increase the stability of the sheet metal part. An upper insertion block 40 is provided on the lower side wall of one of the upper clamping plates 21 for insertion and cooperation with the hole on the sheet metal part, and the size of the upper insertion block 40 is smaller than the size of the hole on the sheet metal part. A fixing plate 27 is fixed on the upper side wall of one of the upper clamping plates 21. A slot 31 is provided at one end of the fixing plate 27. The upper side wall of the other upper clamping plate 21 is movably connected to the fixing plate 27. The floating plate 26 above 7 has a locking block 35 at one end of its bottom for engaging with the slot 31. The locking block 35 has a trapezoidal or triangular cross section. The upper side wall of the upper clamping plate 21 corresponding to the floating plate 26 has a protruding plate 32 located above the floating plate 26. A first elastic structure 33 is provided between the protruding plate 32 and the floating plate 26. The first elastic structure 33 is preferably a spring. In order to realize the automatic pressure-flipping and hiding of the upper clamping plate 21, a blind hole is provided on the side of the fixed seat 25. The end of the upper clamping plate 21 is provided with a first rotating shaft 30 rotatably connected to the blind hole. A torsion spring 29 is provided between one end of the first rotating shaft 30 and the inner wall of the blind hole. A traction arm 28 corresponding to the sheet metal part is provided on the side of the floating plate 26. The lower end of the traction arm 28 is lower than the fixed plate 27. In order to reduce the friction between the lower end of the traction arm 28 and the sheet metal part, a roller is rotatably provided at the lower end of the traction arm 28. The roller is used to roll and engage with the edge of the sheet metal part.

[0039] Further, such as Figures 2-5 , Figure 11As shown, the lower side wall of the hollow rotating column 6 is provided with a bracket 8 corresponding to the first clamping frame 11. The upper end of the bracket 8 is provided with a lower clamping component for automatically fixing the lower end of the sheet metal part. The lower clamping component includes a second clamping frame 17 located on the upper end of the second rotating shaft 36. The upper end of the second clamping frame 17 is provided with a pair of lower clamping plates 37, and the distance between the two lower clamping plates 37 is slightly greater than the thickness of the sheet metal part. A clamping block 39 is movably connected to the inner side wall of one of the lower clamping plates 37. The upper end of the clamping block 39 is inclined to facilitate the sheet metal part to squeeze and push the clamping block 39. The clamping block 39 is used to engage with the holes on the sheet metal part. A second elastic structure 38 is provided between one end of the clamping block 39 and the inner side wall of the corresponding lower clamping plate 37. The second elastic structure 38 is preferably a spring. In order to facilitate the subsequent disassembly of the sheet metal part, a manual pull rod 34 extending to the outside of the lower clamping plate 37 is provided on the side of the clamping block 39 near the second elastic structure 38. In order to prevent the sheet metal part from rotating when it approaches the lower clamping component, a vertical groove 24 is provided at the upper end of the spiral groove 22, and the inner wall of the vertical groove 24 smoothly transitions with the inner wall of the spiral groove 22.

[0040] Further, such as Figure 4-Figure 6 , Figure 11 As shown, to facilitate the upward reset of the upper clamping component while continuing to drive the sheet metal part to rotate, a second rotating shaft 36 is provided inside the bracket 8 to drive the lower clamping component to rotate. The second rotating shaft 36 is a damped rotation and will not easily rotate, ensuring that the sheet metal part can correspond to the gap between the pair of lower clamping plates 37 when it descends to the lower clamping component. The lower end of the inner side of the hollow rotating column 6 is rotatably provided with a lower rotating shaft 15 corresponding to the bracket 8, and the upper end is provided with an upper rotating shaft corresponding to the lower rotating shaft 15. Shaft 16, and the lower rotating shaft 15 and the upper rotating shaft 16 are rotatably connected by a one-way bearing. Specifically, a one-way bearing is embedded in the inner side of the lower end of the upper rotating shaft 16, and the upper end of the lower rotating shaft 15 is fixed to the inner wall of the one-way bearing. The upper end of the lead screw 14, the upper end of the upper rotating shaft 16, the lower end of the lower rotating shaft 15, and the second rotating shaft 36 are all provided with corresponding synchronous pulleys 19. Synchronous belts 18 are provided on the two corresponding synchronous pulleys 19, and the synchronous belts 18 penetrate the side wall of the hollow rotating column 6.

[0041] To achieve continuous detection, the hollow rotating column 6 is rotatably positioned in the middle of the inner cavity of the outer shell 1. The top of the outer shell 1 is provided with a first driving source 5 for driving the hollow rotating column 6 to rotate. The first driving source 5 is preferably a geared motor. The driving mechanism and the clamp switching assembly are evenly arranged around the circumferential side of the hollow rotating column 6. A loading and unloading window 2 is provided on one side of the outer shell 1. The industrial camera 3 is staggered from the loading and unloading window 2.

[0042] To increase the brightness of the image, a light source 4 is provided on the lower side of the outer casing 1, which corresponds to the industrial camera 3 and faces the sheet metal part.

[0043] In use, open the loading / unloading window 2, place the sheet metal part to be inspected under the first clamping frame 11, and flip the upper clamping plate 21 with the upper insert block 40 downwards. The upper clamping plate 21 torsion spring 29 is twisted by the first rotating shaft 30, and the hole at one end of the sheet metal part is fitted onto the upper insert block 40. Then, flip the other upper clamping plate 21 downwards, so that the fixed plate 27 moves closer to the floating plate 26, and the locking block 35 contacts the fixed plate 27 and is pressed. Then, the second rotating shaft 36 drives the locking block 35 to move upwards, and the first elastic structure 33 is compressed. When the two upper clamping plates 21 are vertical, the locking block 35 is engaged in the locking slot 31, and the sheet metal part is fixed at this time. Then, control the first drive source 5 to drive the hollow rotating column 6 to rotate a certain angle so that the sheet metal part corresponds to the industrial camera 3. At this time, the lower end of the sheet metal part is aligned with the industrial camera. 3 corresponds to the second drive source 9 corresponding to the sheet metal part. The second drive source 9 drives the lead screw 14 to rotate, the lead screw 14 drives the lifting frame 20 to descend, and the lifting frame 20 drives the rotating rod 10 to descend. With the cooperation of the guide block 23 and the spiral groove 22, the rotating rod 10 drives the sheet metal part to rotate through the first clamp frame 11. It rotates while descending, and cooperates with the industrial camera 3 to realize detection. At this stage, although the lead screw 14 drives the upper rotating shaft 16 to rotate through the synchronous belt 18 and the synchronous pulley 19, the lower rotating shaft 15 is rotatably connected to the upper rotating shaft 16 through a one-way bearing. At this time, the upper rotating shaft 16 will rotate relative to the lower rotating shaft 15, while the lower rotating shaft 15 remains stationary. When the sheet metal part approaches the lower clamp component, the guide block 23 enters the vertical groove 24. At this time, the rotating rod 10 will not pass through the first clamp frame 11. The clamp frame 11 drives the sheet metal part to rotate, and the lower end of the sheet metal part corresponds to the gap between the pair of lower clamping plates 37. The sheet metal part moves vertically downward a short distance, so that the lower end of the sheet metal part enters between the pair of lower clamping plates 37. At this time, the sheet metal part is compressed, and the upper end of the clamping block 39 is inclined and compressed. The clamping block 39 will displace and compress the second elastic structure 38. The clamping block 39 is inserted into the hole at the lower end of the sheet metal part. Because the sheet metal part is compressed, and the size of the hole on the sheet metal part is larger than that of the upper insertion block 40, the sheet metal part will move upward relative to the upper clamping plate 21. Then, the lower roller of the traction arm 28 will contact and be compressed with the upper edge of the sheet metal part. Then, the traction arm 28 drives the floating plate 26 to move upward, and the first elastic structure 33 is compressed again. Then, the floating plate 26 drives the locking block 35 to move upward, and the locking block 35 disengages from the locking slot 31 and unlocks. Then, the twisting... Spring 29 resets, the two upper clamping plates 21 flip open and hide in opposite directions, and then the second drive source 9 drives the lead screw 14 to reverse. At this time, the upper rotating shaft 16 drives the lower rotating shaft 15 to rotate, the rotating rod 10 and the first clamping frame 11 rise and reset, and the lower rotating shaft 15 drives the second rotating shaft 36 to rotate through the lower synchronous belt 18 and synchronous pulley 19. The second rotating shaft 36 then drives the sheet metal part to continue to rotate through the lower clamping component. At this time, the industrial camera 3 is controlled to detect the upper area of ​​the sheet metal part, thereby realizing comprehensive detection and improving efficiency. Moreover, multiple sheet metal parts can be fixed on the side of the hollow rotating column 6. While detecting, loading and unloading operations can also be performed through the loading and unloading window 2. When loading and unloading, the manual pull rod 34 is manually pulled open, and the manual pull rod 34 drives the clamping block 39 to disengage from the hole on the sheet metal part.The sheet metal part is then removed, and the sheet metal part to be inspected is fixed between the two upper clamping plates 21 at the bottom of the first clamping frame 11;

[0044] It should be noted that the upper clamping component and the lower clamping component of this application are applicable to situations where there are holes in the sheet metal parts. The above is the preferred embodiment, which is applicable to the inspection of specific sheet metal parts. In this case, automatic fixing and self-unlocking under pressure can be achieved. When there are no holes in the sheet metal parts, the upper clamping component and the lower clamping component need to be replaced. It is preferable to fix them by pneumatic grippers or other devices that can automatically clamp or release the clamps.

[0045] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A visual inspection device for sheet metal parts processing based on industrial vision, characterized in that: Includes an outer casing, and an industrial camera is mounted on the lower side wall of the outer casing; A hollow rotating column is provided in the middle of the inner cavity of the outer shell. A drive mechanism for driving the sheet metal parts to lift and rotate is provided on the side of the hollow rotating column. The drive mechanism includes a support frame provided on the upper side of the hollow rotating column. A lead screw is rotatably provided on the upper end of the support frame. A second drive source for driving the lead screw to rotate is provided on the top of the lead screw. A lifting frame is threaded to the outside of the lead screw. The lower end of the lifting frame extends to the bottom of the support frame and is rotatably provided with a rotating rod. A spiral groove is provided on the side wall of the rotating rod. A guide frame corresponding to the rotating rod is provided on the side wall of the hollow rotating column. One end of the guide frame is movably sleeved with the rotating rod, and a guide block that movably cooperates with the spiral groove is provided on one end of the guide frame. It also includes a clamp switching assembly, which includes a first clamp frame disposed at the bottom of the rotating rod, an upper clamp component disposed at the bottom of the first clamp frame, a bracket corresponding to the first clamp frame disposed on the lower side wall of the hollow rotating column, a lower clamp component disposed at the upper end of the bracket for automatically fixing one end of the sheet metal part, a second rotating shaft disposed on the inner side of the bracket for driving the lower clamp component to rotate, a lower rotating shaft corresponding to the bracket rotatably disposed at the lower inner side of the hollow rotating column, an upper rotating shaft corresponding to the lower rotating shaft disposed at the upper end, and the lower rotating shaft and the upper rotating shaft are rotatably connected by a one-way bearing. Corresponding synchronous pulleys are disposed on the upper end of the lead screw, the upper end of the upper rotating shaft, the lower end of the lower rotating shaft, and the second rotating shaft, and synchronous belts are disposed on the two corresponding synchronous pulleys. The upper clamping component includes fixed seats at both ends of the bottom of the first clamping frame. Upper clamping plates are rotatably mounted on the sides of both fixed seats. One upper clamping plate has an upper insert block on its lower side wall for interlocking with a hole on a sheet metal part. The size of the upper insert block is smaller than the size of the hole on the sheet metal part. A fixed plate is fixed to the upper side wall of one upper clamping plate. A slot is provided at one end of the fixed plate. A floating plate located above the fixed plate is movably connected to the upper side wall of the other upper clamping plate. A locking block for interlocking with the slot is provided at the bottom of one end of the floating plate. The locking block has a trapezoidal or triangular cross section. A protruding plate located above the floating plate is provided on the upper side wall of the upper clamping plate corresponding to the floating plate. A first elastic structure is provided between the protruding plate and the floating plate. The upper clamping component is provided with a self-reversing hiding component, which includes a blind hole provided on the side of the fixed base. The end of the upper clamping plate is provided with a first rotating shaft that is rotatably connected to the blind hole, and a torsion spring is provided between one end of the first rotating shaft and the inner wall of the blind hole. The side of the floating plate is provided with a traction arm corresponding to the sheet metal part, and the lower end of the traction arm is lower than the fixed plate. The upper end of the spiral groove is provided with a vertical groove, and the inner wall of the vertical groove smoothly transitions with the inner wall of the spiral groove. The lower clamping component includes a second clamping frame disposed on the upper end of the second rotating shaft. A pair of lower clamping plates are disposed on the upper end of the second clamping frame. A clamping block is movably connected to the inner side wall of one of the lower clamping plates. The upper end of the clamping block is inclined and is used to insert and cooperate with holes on the sheet metal part. A second elastic structure is disposed between one end of the clamping block and the inner side wall of the corresponding lower clamping plate.

2. The appearance inspection device for sheet metal processing based on industrial vision according to claim 1, characterized in that: The clamping block is provided with a manual pull rod extending to the outside of the lower clamping plate on the side near the second elastic structure.

3. The appearance inspection device for sheet metal processing based on industrial vision according to claim 1, characterized in that: The lower end of the traction arm is rotatably equipped with a roller, which is used to roll and engage with the edge of the sheet metal part.

4. A visual inspection device for sheet metal parts processing based on industrial vision according to any one of claims 1-3, characterized in that: The hollow rotating column is rotatably disposed in the middle of the inner cavity of the outer shell, and a first driving source for driving the hollow rotating column to rotate is provided at the top of the outer shell. The drive mechanism and the clamp switching assembly are evenly arranged around the circumferential side of the hollow rotating column.

5. The appearance inspection device for sheet metal processing based on industrial vision according to claim 4, characterized in that: A loading / unloading window is provided on one side of the outer casing.

6. The appearance inspection device for sheet metal processing based on industrial vision according to claim 4, characterized in that: A light source corresponding to an industrial camera is provided through the lower side of the outer casing.

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