Appearance detection device for sheet metal part processing based on industrial vision

Abstract

The invention relates to the field of sheet metal part production, and particularly discloses an appearance detection device for sheet metal part processing based on industrial vision, the appearance detection device comprises an outer shell, the side wall of the lower end of the outer shell is provided with an industrial camera; a hollow rotating column is arranged in the middle of an inner cavity of the outer shell, and a driving mechanism used for driving the sheet metal part to ascend, descend and rotate is arranged on the side face of the hollow rotating column. The device further comprises a clamp switching assembly. According to the appearance detection device for sheet metal part machining based on industrial vision, the arranged driving mechanism is matched with the clamp switching assembly, a sheet metal part rotates while descending, switching of an upper clamp part and a lower clamp part is achieved when the sheet metal part reaches the bottom, efficient appearance detection of the sheet metal part can be achieved, and due to continuous rotation of the sheet metal part, the sheet metal part is not damaged; and the visual angle between the industrial camera and the sheet metal part is continuously changed, so that a visual blind area is avoided.

Description

Technical Field

[0001] The present invention relates to the field of sheet metal production, and in particular to an appearance detection device for sheet metal processing based on industrial vision. Background Art

[0002] During the sheet metal processing process, the appearance quality directly affects the assembly accuracy and performance of the product. Since stamping, bending and other processes are prone to cause defects such as scratches, dents, warping or surface rust, 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 casings, minor appearance defects may cause structural failure or sealing problems.

[0003] Existing inspection technologies generally use single-station fixed visual inspection systems, which require physical positioning of sheet metal parts through mechanical fixtures, and image acquisition and defect analysis are completed side by side. This method requires repeated adjustment of the clamping posture for workpieces with irregular geometric shapes or bending structures, and single-piece inspection takes a long time. Secondly, the coordinated movement between the fixing device and the flipping mechanism leads to increased system complexity and increased frequency of manual intervention. More importantly, single-view imaging is prone to visual blind spots. These technical defects restrict the production line rhythm, and the proportion of manual re-inspection remains at a high proportion, which cannot meet the requirements of intelligent manufacturing for full-process automation.

[0004] Therefore, it is necessary to propose an appearance inspection device for sheet metal 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 processing based on industrial vision, which solves the problem of low inspection efficiency of sheet metal parts in the prior art in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: An appearance inspection device for sheet metal processing based on industrial vision, comprising an outer shell, wherein an industrial camera is provided on a lower side wall of the outer shell; The driving mechanism that the present invention relates to is that the cam is located in the upper part of the cam body and the cam face has the advantages of small size and high efficiency, and the like. The cam face has the advantages of small size and high efficiency, and the like. The cam face has the advantages of small size and high efficiency, and the cam face has the advantages of small size and high efficiency. The cam is secured to the bottom of the first support frame and secured to the bottom of the second support frame, and the cam is secured to the bottom of the second support frame by a spring.

[0007] Preferably, the upper clamp component includes a fixing seat arranged at both ends of the bottom of the first clamp frame, and the sides of the fixing seats at both ends are rotatably provided with an upper clamping plate, the lower end side wall of one of the upper clamping plates is provided with an upper plug-in block for plugging and cooperating with the hole on the sheet metal part, and the size of the upper plug-in block is smaller than the size of the hole on the sheet metal part, the upper end side wall of one of the upper clamping plates is fixed with a fixing plate, one end of the fixing plate is provided with a slot, and the upper end side wall of the other upper clamping plate is movably connected to a floating plate located above the fixing plate, and the bottom of one end of the floating plate is provided with a clamping block for plugging and cooperating with the slot, and the cross-section of the clamping block is trapezoidal or triangular, and the upper end side wall of the upper clamping plate corresponding to the floating plate is provided with a convex plate located above the floating plate, and a first elastic structure is provided between the convex plate and the floating plate.

[0008] Preferably, a self-flipping hidden component is provided on the upper clamp component, and the self-flipping hidden component includes a blind hole provided on the side of the fixed seat, the end of the upper clamp is provided on 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.

[0009] Preferably, a vertical groove is provided at the upper end of the spiral groove, and the inner wall of the vertical groove transitions smoothly with the inner wall of the spiral groove.

[0010] Preferably, the lower clamp component includes a second clamp frame arranged at the upper end of the second rotating shaft, and a pair of lower clamps are provided at the upper end of the second clamp frame, wherein a clamp block is movably connected to the inner side of the side wall of one of the lower clamps, the upper end of the clamp block is a slope, and the clamp block is used to plug and cooperate with the hole on the sheet metal part, and a second elastic structure is provided between one end of the clamp block and the inner side of the side wall of the corresponding lower clamp plate.

[0011] Preferably, a manual pull rod extending to the outside of the lower clamping plate is provided on one side of the clamping block close to the second elastic structure.

[0012] Preferably, a roller is rotatably provided at the lower end of the traction arm, and the roller is used for rolling cooperation with the edge of the sheet metal part.

[0013] Preferably, the hollow rotating column is rotatably arranged in the middle of the inner cavity of the outer shell, and the top end of the outer shell is provided with a first driving source for driving the hollow rotating column to rotate; The driving mechanism and the clamp switching assembly are evenly arranged around the circumferential side of the hollow rotating column.

[0014] Preferably, a loading and unloading window is provided on one side of the outer shell.

[0015] Preferably, a light source corresponding to the industrial camera and used for blowing hot air to the sheet metal part is provided through the side surface of the lower end of the outer shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The appearance inspection device for sheet metal processing based on industrial vision realizes efficient appearance inspection of sheet metal parts by coordinating a driving mechanism with a fixture switching component. The sheet metal part rotates while descending, and the upper and lower fixture parts are switched when reaching the bottom. Moreover, due to the continuous rotation of the sheet metal part, the viewing angle between the industrial camera and the sheet metal part is constantly changing, thereby avoiding the generation of visual blind spots. The upper fixture part is automatically opened and hidden by being squeezed by one end of the sheet metal part, and the lower fixture part is automatically fixed to the sheet metal part by being squeezed by the other end of the sheet metal part, thereby changing the fixed position. After the fixture is switched, the driving mechanism is reversed and reset. At the same time, the sheet metal part can continue to rotate, and the industrial camera can be used to monitor the remaining part blocked by the upper fixture part. The device has a compact structure, is easy to use, and has improved efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present 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 the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them: Figure 1 Schematically shows the overall structural diagram of the present invention; Figure 2 The schematic diagram of the structure inside the outer shell of the present invention is shown schematically; Figure 3 The schematic diagram shows the structure of the protective shell and the hollow rotating column of the present invention in a disassembled state; Figure 4 Schematically shows a partial cross-sectional structural diagram of the hollow rotating column of the present invention; Figure 5 Schematically shows the structure of the lower rotating shaft and the upper rotating shaft of the present invention in a disassembled state; Figure 6 Schematically shows the structure of the present invention when the upper rotating shaft and the screw rod are in the matching state; Figure 7 Schematically shows the structure of the upper end of the rotating rod and the guide frame of the present invention in a disassembled state; Figure 8 A schematic diagram of the structure of the two upper splints corresponding to the present invention in a vertically combined state is shown; Figure 9 The present invention is schematically shown Figure 8 Schematic diagram of the structure in the disassembled state; Figure 10 The present invention is schematically shown Figure 8 Schematic diagram of the structure in the cross-section state of the foundation; Figure 11 The cross-sectional structure diagram of the bracket of the present invention is schematically shown.

[0018] Numbers in the figure: 1. Outer shell; 2. Loading and unloading window; 3. Industrial camera; 4. Light source; 5. First driving source; 6. Hollow rotating column; 7. Protective shell; 8. Bracket; 9. Second driving source; 10. Rotating rod; 11. First fixture frame; 12. Guide frame; 13. Support frame; 14. Screw; 15. Lower rotating shaft; 16. Upper rotating shaft; 17. Second fixture frame; 18. Synchronous belt; 19. Synchronous pulley; 20. Lifting frame ; 21. Upper splint; 22. Spiral groove; 23. Guide block; 24. Vertical groove; 25. Fixed seat; 26. Floating plate; 27. Fixed plate; 28. Pulling arm; 29. Torsion spring; 30. First rotating shaft; 31. Slot; 32. Protruding plate; 33. First elastic structure; 34. Manual pull rod; 35. Block; 36. Second rotating shaft; 37. Lower splint; 38. Second elastic structure; 39. Clamping block; 40. Upper plug block. DETAILED DESCRIPTION

[0019] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0020] According to one embodiment of the present invention, Figures 1-11 Shown.

[0021] like Figure 1-Figure 7 As shown, an appearance inspection device for sheet metal processing based on industrial vision includes an outer shell 1, and an industrial camera 3 is provided on the lower side wall of the outer shell 1. The industrial camera 3 is an existing conventional technical means and will not be described in detail. A hollow rotating column 6 is provided in the middle of the inner cavity of the outer shell 1, and a driving mechanism for driving the sheet metal to lift and rotate is provided on the side of the hollow rotating column 6. The driving mechanism includes a support frame 13 provided on the upper side of the hollow rotating column 6, and a screw rod 14 is rotatably provided on the upper end of the support frame 13. A second driving source 9 for driving the screw rod 14 to rotate is provided on the top of the screw rod 14. The second driving source 9 is preferably a reduction motor. The external thread of the screw rod 14 is connected to the lifting frame 20, and the lower end of the lifting frame 20 extends to the bottom of the support frame 13 and is rotatably provided with a rotating Rod 10, and the extension of the lifting frame 20 and the support frame 13 is a movable guide, the lifting frame 20 will not rotate with the screw rod 14, the side wall of the rotating rod 10 is provided with a spiral groove 22, and the side wall of the hollow rotating column 6 is provided with a guide frame 12 corresponding to the rotating rod 10, and one end of the guide frame 12 is movably connected to the rotating rod 10, and the inner side of the connection between the guide frame 12 and the rotating rod 10 is provided with a guide block 23 that movably cooperates with the spiral groove 22. In order to protect the driving mechanism, a protective shell 7 is provided on the upper end side of the hollow rotating column 6, and the lower end of the rotating rod 10 extends to the bottom of the protective shell 7. The second driving source 9 is installed on the top of the protective shell 7, and a maintenance port can be provided on the protective shell 7 for regular lubrication of the screw rod 14 and the rotating rod 10.

[0022] like Figure 3-Figure 6 、 Figures 8-10As shown, in order to change the fixing position of the sheet metal part, a first clamp frame 11 is provided at the bottom of the rotating rod 10, and an upper clamp component is provided at the bottom of the first clamp frame 11, and the upper clamp component is used to fix the upper end of the sheet metal part, and the upper clamp component can be automatically unlocked and hidden under pressure. As a preferred embodiment, the upper clamp component includes a fixing seat 25 provided at both ends of the bottom of the first clamp frame 11, and the sides of the fixing seats 25 at both ends are rotatably provided with an upper clamping plate 21. When the two upper clamping plates 21 are in a vertical state, the spacing 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. The lower end side wall of one of the upper clamping plates 21 is provided with an upper plug block 40 for plugging into the hole on the sheet metal part, and the size of the upper plug block 40 is smaller than the size of the hole on the sheet metal part. The upper end side wall of one of the upper clamping plates 21 is fixed with a fixing plate 27, and one end of the fixing plate 27 is provided with a slot 31, and the upper end side wall of the other upper clamping plate 21 is movably connected with a fixing plate 2 The cam 32 is provided on the upper end of the upper clamping plate 21 corresponding to the floating plate 26, and a first elastic structure 33 is provided between the cam 32 and the floating plate 26. The first elastic structure 33 is preferably a spring. In order to realize the automatic pressure-resistant flip and hiding of the upper clamping plate 21, a blind hole is provided on the side of the fixing seat 25. The end of the upper clamping plate 21 is provided with a first rotating shaft 30 rotatably connected to the blind hole, and 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 is provided on the side of the floating plate 26, and 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, a roller is rotatably provided at the lower end of the traction arm 28, and the roller is used to roll with the edge of the sheet metal. Further, such as Figure 2-Figure 5 、 Figure 11As shown, the lower side wall of the hollow rotating column 6 is provided with a bracket 8 corresponding to the first clamp frame 11, and the upper end of the bracket 8 is provided with a lower clamp component for automatically fixing the lower end of the sheet metal. The lower clamp component includes a second clamp frame 17 provided on the upper end of the second rotating shaft 36. The upper end of the second clamp frame 17 is provided with a pair of lower clamping plates 37, and the distance between the two lower clamping plates 37 is slightly larger than the thickness of the sheet metal. A clamping block 39 is movably connected to the inner side of the side wall of one of the lower clamping plates 37. The upper end of the clamping block 39 is an inclined surface, which is convenient for the sheet metal to squeeze and push the clamping block 39. The clamping block 39 is used to engage with the hole on the sheet metal part. A second elastic structure 38 is provided between one end of the clamping block 39 and the inner side of the 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 close to the second elastic structure 38. In order to prevent the sheet metal part from rotating when it approaches the lower clamping part, 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 to the inner wall of the spiral groove 22. Further, such as Figure 4-Figure 6 、 Figure 11 As shown, in order to facilitate the upper clamp component to rise and reset while continuing to drive the sheet metal to rotate, a second rotating shaft 36 is provided on the inner side of the bracket 8 for driving the lower clamp component to rotate. The second rotating shaft 36 is a damped rotation and will not rotate easily, ensuring that the sheet metal can correspond to the gap between a pair of lower clamping plates 37 when it descends to the lower clamp 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 through 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 screw rod 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 wheels 19, and the corresponding two synchronous wheels 19 are provided with synchronous belts 18, and the synchronous belts 18 are arranged through the side wall of the hollow rotating column 6.

[0023] In order to achieve continuous detection, the hollow rotating column 6 is rotated and set 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 reduction motor. The driving mechanism and the fixture 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, and the industrial camera 3 is staggered with the loading and unloading window 2.

[0024] In order to increase the shooting brightness, a light source 4 is provided on the lower side of the outer shell 1 , corresponding to the industrial camera 3 and facing the sheet metal part.

[0025] When in use, open the loading and unloading window 2, place the sheet metal to be inspected under the first clamp frame 11, flip down the upper clamping plate 21 with the upper plug block 40, and the upper clamping plate 21 twists the torsion spring 29 through the first rotating shaft 30 to put the hole at one end of the sheet metal on the upper plug block 40, and then flip down the other upper clamping plate 21, so that the fixed plate 27 approaches the floating plate 26, and then the block 35 contacts and is compressed with the fixed plate 27, and then the second rotating shaft 36 drives the block 35 to move up, and the first elastic structure 33 is compressed. When the two upper clamping plates 21 are vertical, the block 35 is stuck in the slot 31, and the fixation of the sheet metal is completed. Then the first driving source 5 is controlled to drive the hollow rotating column 6 to rotate a certain angle so that the sheet metal corresponds to the industrial camera 3. At this time, the lower end of the sheet metal is aligned with the industrial camera 3 corresponds, and then controls the second driving source 9 corresponding to the sheet metal part, the second driving source 9 drives the screw rod 14 to rotate, the screw rod 14 drives the lifting frame 20 to descend, and the lifting frame 20 drives the rotating rod 10 to descend. Under 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, and rotates while descending, and cooperates with the industrial camera 3 to realize detection. At this stage, although the screw rod 14 drives the upper rotating shaft 16 to rotate through the synchronous belt 18 and the synchronous wheel 19, the lower rotating shaft 15 is 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, and 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 The clamping block 39 will be displaced and compressed by the second elastic structure 38, and the clamping block 39 will be inserted into the hole at the lower end of the sheet metal. Because the sheet metal is under pressure and the size of the hole on the sheet metal is larger than the upper insert block 40, the sheet metal will move up relative to the upper clamping plate 21, and then the roller at the lower end of the traction arm 28 will contact and be compressed with the upper edge of the sheet metal, and then the traction arm 28 will drive the floating plate 26 to move up, and the first elastic structure 33 will be compressed again, and then the floating plate 26 will drive the clamping block 35 to move up, and the clamping block 35 will be unlocked from the slot 31, and then the The spring 29 is reset, and the two upper clamps 21 are flipped back to back, opened and hidden, and then the second driving source 9 is controlled to drive the screw rod 14 to reverse. At this time, the upper rotating shaft 16 will drive the lower rotating shaft 15 to rotate, and the rotating rod 10 and the first clamp frame 11 rise and reset. The lower rotating shaft 15 drives the second rotating shaft 36 to rotate through the synchronous belt 18 and the synchronous wheel 19 at the lower end, and the second rotating shaft 36 drives the sheet metal to continue to rotate through the lower clamp component. At this time, the industrial camera 3 is controlled to detect the upper end area of the sheet metal, thereby realizing comprehensive detection and improving efficiency. In addition, 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.Then, the sheet metal part to be inspected is removed and fixed between the two upper clamping plates 21 at the bottom of the first fixture frame 11; It should be noted that the upper clamp component and the lower clamp component of the present application are suitable for situations where there are holes on the sheet metal. The above is the optimal embodiment, which is suitable for specific sheet metal detection. In this case, automatic fixation and self-unlocking under pressure can be achieved. When there are no holes on the sheet metal, the upper clamp component and the lower clamp component need to be replaced, preferably by means of pneumatic clamps, or other devices that can automatically clamp or release the clamp.

[0026] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An appearance inspection device for sheet metal processing based on industrial vision, characterized by: It comprises an outer shell, wherein the lower end side wall of the outer shell is provided with an industrial camera; The driving mechanism that the present invention relates to is that the cam is located in the upper part of the cam body and the cam face has the advantages of small size and high efficiency, and the like. The cam face has the advantages of small size and high efficiency, and the like. The cam face has the advantages of small size and high efficiency, and the cam face has the advantages of small size and high efficiency. The cam is secured to the bottom of the first support frame and secured to the bottom of the second support frame, and the cam is secured to the bottom of the second support frame by a spring.

2. The appearance inspection device for sheet metal processing based on industrial vision according to claim 1, characterized in that: The cam is secured to the bottom of the first and second mounting plates, which are secured to the bottom of the first and second mounting plates at a speeds of 100 to 250 km / h. The cam is secured to the bottom of the first and second mounting plates at a speeds of 100 to 250 km / h.

3. The appearance inspection device for sheet metal processing based on industrial vision according to claim 2, characterized in that: The upper clamp component is provided with a self-flipping hidden component, and the self-flipping hidden component includes a blind hole provided on the side of the fixed seat, the end of the upper clamp is provided on the 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 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.

4. The appearance inspection device for sheet metal processing based on industrial vision according to claim 1, characterized in that: A vertical groove is provided at the upper end of the spiral groove, and the inner wall of the vertical groove transitions smoothly with the inner wall of the spiral groove.

5. The appearance inspection device for sheet metal processing based on industrial vision according to claim 4, characterized in that: The lower clamp component includes a second clamp frame arranged at the upper end of the second rotating shaft, and a pair of lower clamping plates are provided at the upper end of the second clamp frame, wherein a clamping block is movably connected to the inner side of the side wall of one of the lower clamping plates, the upper end of the clamping block is an inclined surface, and the clamping block is used to plug and cooperate with the hole on the sheet metal part, and a second elastic structure is provided between one end of the clamping block and the inner side of the side wall of the corresponding lower clamping plate.

6. The appearance inspection device for sheet metal processing based on industrial vision according to claim 5, characterized in that: A manual pull rod extending to the outside of the lower clamping plate is provided on one side of the clamping block close to the second elastic structure.

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

8. The appearance inspection device for sheet metal processing based on industrial vision according to any one of claims 1 to 7, characterized in that: The hollow rotating column is rotatably arranged in the middle of the inner cavity of the outer shell, and the top end of the outer shell is provided with a first driving source for driving the hollow rotating column to rotate; The driving mechanism and the clamp switching assembly are evenly arranged around the circumferential side of the hollow rotating column.

9. The appearance inspection device for sheet metal processing based on industrial vision according to claim 8, characterized in that: A loading and unloading window is provided on one side of the outer shell.

10. The appearance inspection device for sheet metal processing based on industrial vision according to claim 8, characterized in that: A light source corresponding to the industrial camera is provided through the lower end side surface of the outer shell.

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