Stamping part appearance defect detection device based on machine vision

Abstract

The invention discloses a device for detecting appearance defects of stamping parts based on machine vision. Comprising a bottom plate, bosses arranged on the two sides of the bottom plate, vertical frame plates arranged on the two sides of the bosses, clamping parts connected with the bottom plate in a sliding mode, direction adjusting detection structures arranged on the inner sides of the bosses, overlook detection structures arranged on the tops of the vertical frame plates and lateral detection structures arranged on the inner walls of the vertical frame plates, and two sliding rails are arranged on the top of the bottom plate; a movable conveying block is arranged on the sliding rail, the top of the conveying block is connected with a clamping component, rotatable shaft rods are symmetrically arranged on the two sides of the inner wall of the boss, the outer ends of the shaft rods are connected with a direction adjusting detection structure, and longitudinal sliding groove plates are symmetrically arranged on the inner side of the vertical frame plate. A first hydraulic cylinder is arranged at the bottom end of the sliding groove plate, and the output end of the first hydraulic cylinder is connected with the lateral detection structure. The visual inspection device can perform visual inspection on the automobile stamping part at multiple angles, and the inspection is relatively comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical detection, and in particular to a detection device for appearance defects of stamping parts based on machine vision. Background Art

[0002] Stamping parts are widely used in the automotive manufacturing industry, and the detection methods for the surface quality of various stamping parts mainly include manual detection methods such as visual inspection, touch inspection, oiling inspection and fixture inspection. The shortcomings of manual inspection (such as the resolution ability of the human eye, visual fatigue, etc.) make enterprises invest a lot of money in the detection of workpiece surface quality, but still cannot guarantee a high and stable pass rate and detection efficiency. Therefore, it is necessary to study the automatic detection technology suitable for the surface defects of automobile stamping parts in a timely manner to improve the detection efficiency and detection quality. As a non-contact automatic detection technology widely used in recent years, machine vision detection technology has the main principle of imitating the visual perception principle of the human eye, obtaining the initial image and saving the processing and judgment, so that the machine has the same visual function as a human, thereby realizing the functions of detection, judgment, recognition, measurement, etc. This method is an important means to detect and analyze the surface defects of workpieces. Therefore, applying machine vision technology to the detection of surface defects of stamping parts can improve the detection accuracy and automation level of the surface quality of stamping parts.

[0003] The existing detection device cannot detect stamping parts at multiple angles during the detection process, which makes the detected products easily unqualified. Therefore, a detection device for the appearance defects of stamping parts based on machine vision is proposed. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a detection device for the appearance defects of stamping parts based on machine vision, which solves the problem that the existing detection devices are unable to detect stamping parts at multiple angles during the detection process, resulting in the detected products being easily unqualified.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a detection device for the appearance defects of stamping parts based on machine vision, comprising a base plate, bosses arranged on both sides of the base plate, a frame plate arranged on both sides of the boss, a clamping component slidably connected to the base plate, a direction adjustment detection structure arranged on the inner side of the boss, a top-view detection structure arranged on the top of the frame plate and a lateral detection structure arranged on the inner wall of the frame plate, two slide rails are arranged on the top of the base plate, and a movable transmission block is arranged on the slide rails, the top of the transmission block is connected to the clamping component, and rotatable shafts are symmetrically arranged on both sides of the inner wall of the boss, the outer ends of the shafts are connected to the direction adjustment detection structure, the inner side of the frame plate is symmetrically provided with longitudinal slide plates, the bottom end of the slide plate is provided with a hydraulic cylinder 1, and the output end of the hydraulic cylinder 1 is connected to the lateral detection structure.

[0008] As a further preferred embodiment of the present invention, a casting block is provided near the middle position of the stand plate, and the top of the casting block is connected to the overhead detection structure, the overhead detection structure includes a disc-shaped seat plate, a plurality of deformable bending rods are equidistantly provided on the outer wall of the seat plate, the outer end of the bending rod is connected to a visual acquisition head, and a plurality of visual acquisition heads are equidistantly provided on the bottom of the seat plate.

[0009] As a further preferred embodiment of the present invention, the clamping component includes a hydraulic cylinder 2, the output end of the hydraulic cylinder 2 is connected to a load-bearing platform, the load-bearing platform is columnar and tapered, four slots are provided on the side wall of the load-bearing platform, a rotatable adjustment rod is provided inside the slot, the adjustment rod is connected to a folding plate, and a clamping block is connected to the top of the folding plate.

[0010] As a further preferred embodiment of the present invention, the direction adjustment detection structure includes a linkage plate, which is inclined, and the outer end of the linkage plate is connected to a horizontal plate, a hydraulic cylinder three is connected near the bottom of the outer end of the horizontal plate, and the output end of the hydraulic cylinder three is connected to a strip block, and a plurality of visual acquisition heads two are equidistantly arranged on the outer wall of the strip block.

[0011] As a further preferred embodiment of the present invention, the lateral detection structure includes a support plate, a card plate is arranged on the top of the support plate, the card plate is in a semicircular ring shape, and a plurality of visual acquisition heads are equidistantly arranged on the outer wall of the card plate.

[0012] As a further preferred embodiment of the present invention, an electromagnetic slide rail is arranged in the middle of the stand plate, movable blocks are symmetrically arranged on both sides of the ingot, and the movable blocks are embedded in the electromagnetic slide rail of the stand plate.

[0013] As a further preferred embodiment of the present invention, a display screen is arranged on the outer wall of the stand plate, and a main control box is arranged on the outer side of the display screen.

[0014] As a further preferred embodiment of the present invention, the main control box is internally provided with a driving module, a direction adjustment module, an image processing module, a quality parameter module, an image comparison module, a warning error reporting module, and a central processing module, and the driving module, the direction adjustment module, the image processing module, the quality parameter module, the image comparison module, the warning error reporting module, and the central processing module are all interconnected.

[0015] (III) Beneficial effects

[0016] The present invention provides a device for detecting appearance defects of stamping parts based on machine vision. It has the following beneficial effects:

[0017] (1) The device for detecting appearance defects of stamped parts of the present invention has two slide rails on the top of its bottom plate. The workpiece can be fixed by driving the clamping parts through the transmission block. When the workpiece is transmitted to the middle position, the top-view detection structure can be used to visually inspect the flatness and defects of the stamped parts from the top. The bending rod on the seat plate of the top-view detection structure can adjust the angle as needed, and the visual acquisition head at its end can be used to collect image information. In addition, a plurality of visual acquisition heads are equidistantly arranged at the bottom of the seat plate to collect information from a top-view angle.

[0018] (2) The direction adjustment detection structure of the present invention can drive the shaft rod and the linkage plate to adjust the angle by using the motor inside the boss. At the same time, the outer end bottom of the horizontal plate is connected to a hydraulic cylinder three to drive the bar block to move downward, adjust the position of the visual acquisition head three, and detect the outside of the stamping part. The overall lateral detection structure can adjust the angle through the hydraulic cylinder two, and the card plate is semicircular, which increases the visual area, and uses a number of visual acquisition heads three equidistantly arranged on the outer wall of the card plate for detection.

[0019] (3) The outer wall of the stand plate of the present invention is provided with a display screen and a main control box. The image is processed and compared using the internal drive module, direction adjustment module, image processing module, quality parameter module, image comparison module, warning error module, and central processing module of the main control box to perform sufficient inspection to ensure the quality of the stamped parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the front view of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the present invention from a top view;

[0023] Figure 4 It is a structural schematic diagram of the clamping component of the present invention;

[0024] Figure 5 It is a schematic diagram of the system principle framework of the main control box of the present invention.

[0025] In the figure: 1. bottom plate; 2. boss; 3. frame plate; 4. transmission block; 5. shaft rod; 6. slide plate; 7. hydraulic cylinder one; 8. casting block; 9. seat plate; 10. bending rod; 11. visual acquisition head one; 12. hydraulic cylinder two; 13. load-bearing platform; 14. adjustment rod; 15. folding plate; 16. clamping block; 17. linkage plate; 18. cross plate; 19. hydraulic cylinder three; 20. strip block; 21. visual acquisition head two; 22. support plate; 23. card plate; 24. visual acquisition head three; 25. electromagnetic slide rail; 26. movable block; 27. display screen; 28. main control box. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-5 The embodiment of the present invention provides a technical solution: a detection device for appearance defects of stamping parts based on machine vision, comprising a base plate 1, a boss 2 arranged on both sides of the base plate 1, a frame plate 3 arranged on both sides of the boss 2, a clamping component slidably connected to the base plate 1, a direction adjustment detection structure arranged on the inner side of the boss 2, a top-view detection structure arranged on the top of the frame plate 3 and a lateral detection structure arranged on the inner wall of the frame plate 3, two slide rails are arranged on the top of the base plate 1, and a movable transmission block 4 is arranged on the slide rails, the top of the transmission block 4 is connected to the clamping component, and a rotatable shaft rod 5 is symmetrically arranged on both sides of the inner wall of the boss 2, and the outer end of the shaft rod 5 is connected to the direction adjustment detection structure, and a longitudinal slide plate 6 is symmetrically arranged on the inner side of the frame plate 3, and a hydraulic cylinder 7 is arranged at the bottom end of the slide plate 6, and the output end of the hydraulic cylinder 7 is connected to the lateral detection structure.

[0028] A casting block 8 is provided near the middle position of the frame plate, and the top of the casting block 8 is connected to a top-view detection structure, which includes a disc-shaped seat plate 9, and a plurality of deformable bending rods 10 are equidistantly provided on the outer wall of the seat plate 9, and a visual acquisition head 11 is connected to the outer end of the bending rod 10, and a plurality of visual acquisition heads 11 are equidistantly provided on the bottom of the seat plate 9. The angle is adjusted by using the bending rod 10 at the outer end of the seat plate 9, and then the visual acquisition head 11 is used to capture images of the stamping parts.

[0029] The clamping component includes a hydraulic cylinder 12, the output end of which is connected to a load-bearing platform 13. The load-bearing platform 13 is columnar and tapered. Four slots are provided on the side wall of the load-bearing platform 13. A rotatable adjustment rod 14 is provided inside the slot. The adjustment rod 14 is connected to a folding plate 15. The top of the folding plate 15 is connected to a clamping block 16. The motor inside the load-bearing platform 13 is used to drive the adjustment rod 14 to rotate, and the folding plate 15 and the clamping block 16 are used to clamp and fix the workpiece.

[0030] The direction adjustment detection structure includes a linkage plate 17, which is inclined, and the outer end of the linkage plate 17 is connected to a horizontal plate 18, and a hydraulic cylinder three 19 is connected to the bottom of the outer end near the horizontal plate 18, and the output end of the hydraulic cylinder three 19 is connected to a strip block 20, and a plurality of visual acquisition heads two 21 are equidistantly arranged on the outer wall of the strip block 20. The hydraulic cylinder three 19 is used to drive the strip block 20 and the visual acquisition head three 21 to collect image information of the stamping parts and perform detection.

[0031] The lateral detection structure includes a support plate 22, on the top of which is a card plate 23, which is in a semicircular ring shape, and on the outer wall of the card plate 23, a number of visual acquisition heads 24 are equidistantly arranged. The visual acquisition heads 24 on the semicircular card plate 23 on the top of the support plate 22 are used to perform real-time detection of the stamping parts.

[0032] An electromagnetic slide rail 25 is arranged in the middle of the frame plate, and movable blocks 26 are symmetrically arranged on both sides of the casting block 8. The movable blocks 26 are embedded in the electromagnetic slide rail 25 of the frame plate. The movable blocks 26 are driven to slide up and down by using the electromagnetic slide rail 25, so that the position of the overhead detection structure can be adjusted up and down.

[0033] A display screen 27 is provided on the outer wall of the stand plate, and a main control box 28 is provided on the outer side of the display screen 27. The display screen 27 can display the collected image, and the main control box 28 is used for intelligent detection.

[0034] The main control box 28 is internally provided with a driving module, an adjustment module, an image processing module, a quality parameter module, an image comparison module, a warning and error reporting module, and a central processing module. The driving module, the adjustment module, the image processing module, the quality parameter module, the image comparison module, the warning and error reporting module, and the central processing module are all interconnected. These modules are used to process and compare images for sufficient inspection to ensure the quality of the stamping parts.

[0035] Working principle: Two slide rails are arranged on the top of the bottom plate 1, and the workpiece can be fixed by driving the clamping parts through the transmission block 4. When it is transmitted to the middle position, the top-view detection structure can be used to visually inspect the flatness and defects of the stamping parts from the top. The bending rod 10 on the seat plate 9 of the top-view detection structure can adjust the angle as needed, and the image information can be collected by using the visual acquisition head 11 at its end, and a number of visual acquisition heads 11 are equidistantly arranged on the bottom of the seat plate 9, which can collect information from the top-view angle. The direction adjustment detection structure can drive the shaft rod 5 and the linkage plate 17 to adjust the angle by using the motor inside the boss 2. At the same time, the outer end bottom of the cross plate 18 is connected A hydraulic cylinder 3 19 is connected to drive the bar block 20 to move downward, adjust the position of the visual acquisition head 3 24, and detect the outside of the stamping part. The lateral detection structure as a whole can adjust the angle through the hydraulic cylinder 2 12, and the card plate 23 is in a semicircular ring shape, which increases the visual area. A number of visual acquisition heads 3 24 are equidistantly arranged on the outer wall of the card plate 23 for detection. A display screen 27 and a main control box 28 are provided on the outer wall of the stand plate 3. The driving module, direction adjustment module, image processing module, quality parameter module, image comparison module, warning error module, and central processing module inside the main control box 28 are used to process and compare the image, and sufficient detection is performed to ensure the quality of the stamping parts.

[0036] The present invention comprises: 1. bottom plate; 2. boss; 3. stand plate; 4. transmission block; 5. shaft rod; 6. slide plate; 7. hydraulic cylinder 1; 8. ingot; 9. seat plate; 10. bending rod; 11. visual acquisition head 1; 12. hydraulic cylinder 2; 13. load-bearing platform; 14. direction adjustment rod; 15. folding plate; 16. clamping block; 17. linkage plate; 18. horizontal plate; 19. hydraulic cylinder 3; 20. strip block; 21. visual acquisition head 2; 22. support plate; 23. card plate; 24. visual acquisition head 3; 25. electromagnetic slide rail; 26. movable block; 27. display screen; 28. main control The machine box, the components are all universal standard parts or components known to the technical personnel in this field, and their structures and principles can be known by the technical personnel in this field through technical manuals or through conventional experimental methods. The problem solved by the present invention is that the existing detection device cannot detect the stamping parts at multiple angles during the detection process, which leads to the problem that the detected products are prone to unqualified phenomena. The present invention combines the above components with each other. The detection device for the appearance defects of stamping parts of the present invention has two slide rails on the top of its bottom plate, and the clamping components can be driven by the transmission block to fix the workpiece. When it is transmitted to the middle position, the top-view detection structure can be used to look down from the top to visually inspect the flatness and defects of the stamping parts. The bending rod on the seat plate of the top-view detection structure can adjust the angle as needed, and the visual collection head at its end can be used to collect image information, and several visual collection heads are equidistantly arranged at the bottom of the seat plate to collect information at a top-view angle. The direction adjustment detection structure of the present invention can drive the shaft rod and the linkage plate to adjust the angle by using the motor inside the boss. At the same time, the outer end bottom of the horizontal plate is connected to a hydraulic cylinder three, which can drive the bar block to move downward to adjust the visual The position of the three vision acquisition heads is detected to inspect the outside of the stamping parts. The angle of the lateral detection structure as a whole can be adjusted by the two hydraulic cylinders, and the card plate is in a semicircular ring shape, which increases the visual area. A number of three vision acquisition heads are equidistantly arranged on the outer wall of the card plate for detection. A display screen and a main control box are arranged on the outer wall of the stand plate of the present invention. The driving module, direction adjustment module, image processing module, quality parameter module, image comparison module, warning error module and central processing module inside the main control box are used to process the image, compare it, and conduct sufficient detection to ensure the quality of the stamping parts.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A detection device for appearance defects of stamping parts based on machine vision, comprising a base plate (1), bosses (2) arranged on both sides of the base plate (1), a stand plate (3) arranged on both sides of the boss (2), a clamping component slidably connected to the base plate (1), a direction adjustment detection structure arranged on the inner side of the boss (2), a top view detection structure arranged on the top of the stand plate (3) and a lateral detection structure arranged on the inner wall of the stand plate (3), characterized in that: Two slide rails are arranged on the top of the base plate (1), and a movable transmission block (4) is arranged on the slide rails. The top of the transmission block (4) is connected to a clamping component. Rotatable shaft rods (5) are symmetrically arranged on both sides of the inner wall of the boss (2). The outer ends of the shaft rods (5) are connected to a direction adjustment detection structure. The inner side of the stand plate (3) is symmetrically provided with longitudinal slide plates (6). The bottom end of the slide plate (6) is provided with a hydraulic cylinder (7). The output end of the hydraulic cylinder (7) is connected to the lateral detection structure.

2. According to claim 1, a stamping parts appearance defect detection device based on machine vision is characterized in that: A casting block (8) is provided near the middle position of the stand plate, and the top of the casting block (8) is connected to the overhead detection structure, the overhead detection structure comprises a disc-shaped seat plate (9), the outer wall of the seat plate (9) is provided with a plurality of deformable bending rods (10) at equal intervals, the outer end of the bending rod (10) is connected to a visual acquisition head (11), and a plurality of visual acquisition heads (11) are provided at equal intervals at the bottom of the seat plate (9).

3. The device for detecting appearance defects of stamping parts based on machine vision according to claim 1, characterized in that: The clamping component comprises a second hydraulic cylinder (12), the output end of the second hydraulic cylinder (12) is connected to a load-bearing platform (13), the load-bearing platform (13) is columnar and tapered, four notches are provided on the side wall of the load-bearing platform (13), a rotatable adjustment rod (14) is provided inside the notch, the adjustment rod (14) is connected to a folding plate (15), and the top end of the folding plate (15) is connected to a clamping block (16).

4. The device for detecting appearance defects of stamping parts based on machine vision according to claim 1, characterized in that: The direction adjustment detection structure comprises a linkage plate (17), the linkage plate (17) is inclined, and the outer end of the linkage plate (17) is connected to a transverse plate (18), a hydraulic cylinder three (19) is connected near the outer end bottom of the transverse plate (18), the output end of the hydraulic cylinder three (19) is connected to a strip block (20), and a plurality of visual acquisition heads two (21) are equidistantly arranged on the outer wall of the strip block (20).

5. The device for detecting appearance defects of stamping parts based on machine vision according to claim 1, characterized in that: The lateral detection structure comprises a support plate (22), a card plate (23) is arranged on the top of the support plate, the card plate (23) is in a semicircular ring shape, and a plurality of visual acquisition heads (24) are equidistantly arranged on the outer wall of the card plate (23).

6. The device for detecting appearance defects of stamping parts based on machine vision according to claim 1, characterized in that: An electromagnetic slide rail (25) is arranged in the middle of the stand plate, and movable blocks (26) are symmetrically arranged on both sides of the ingot (8), and the movable blocks (26) are embedded in the electromagnetic slide rail (25) of the stand plate.

7. The device for detecting appearance defects of stamping parts based on machine vision according to claim 1, characterized in that: A display screen (27) is arranged on the outer wall of the stand plate, and a main control box (28) is arranged outside the display screen (27).

8. The device for detecting appearance defects of stamping parts based on machine vision according to claim 7 is characterized in that: The main control box (28) is provided with a driving module, a direction adjustment module, an image processing module, a quality parameter module, an image comparison module, a warning error reporting module, and a central processing module inside, and the driving module, the direction adjustment module, the image processing module, the quality parameter module, the image comparison module, the warning error reporting module, and the central processing module are all interconnected.

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