Visual inspection device for periphery of workpiece

Abstract

The utility model relates to the technical field of visual inspection, and discloses a workpiece periphery visual inspection device, which comprises at least three lighting devices arranged in a circumferential array around a preset center line; one detection camera is arranged between every two adjacent lighting devices, and light emitted by the lighting devices cannot directly enter a lens of the detection camera; the center line of a lens of the detection camera is perpendicular to the preset center line, and the lens of the detection camera faces the preset center line. The visual detection device for the periphery of the workpiece can better detect the periphery of the workpiece.

Description

TECHNICAL FIELD

[0001] The utility model relates to visual inspection technical field especially relates to a workpiece outer periphery visual inspection device. BACKGROUND

[0002] The visual inspection device comprises a light source and a detection camera, the light source generally emits light vertically downward to illuminate the top surface of the workpiece, and then the detection camera is arranged obliquely to take a photograph of the top surface of the workpiece for detection.

[0003] Therefore, it is necessary to design a workpiece outer periphery visual inspection device to better detect the outer periphery of the workpiece.

[0004] The above information is given as background information only to assist with an understanding of the present disclosure, and does not constitute a determination or admission as to whether any of the above information constitutes prior art with respect to the present disclosure. SUMMARY

[0005] The utility model provides a workpiece outer periphery visual inspection device to better detect the outer periphery of the workpiece.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A workpiece outer periphery visual inspection device comprises:

[0008] Lighting devices are provided with at least three, and all the lighting devices are arranged in a circumferential array around a preset center line;

[0009] Detection cameras are arranged between every two adjacent lighting devices, the light emitted by the lighting devices cannot directly enter the lens of the detection camera, the center line of the lens of the detection camera is perpendicular to the preset center line, and the lens of the detection camera faces the preset center line.

[0010] Optionally, the lighting device comprises a first inclined light emitting section, a second parallel light emitting section and a third inclined light emitting section connected in sequence, and the second parallel light emitting section is parallel to the preset center line.

[0011] The first inclined light emitting section and the third inclined light emitting section are located at opposite ends of the second parallel light emitting section, the first inclined light emitting section is closer to the preset center line when farther away from the second parallel light emitting section, and the third inclined light emitting section is closer to the preset center line when farther away from the second parallel light emitting section.

[0012] Optionally, the lighting device comprises a circuit board and lamp beads installed on the circuit board in an interval along the extension direction of the circuit board.

[0013] The lamp beads are installed on the side of the circuit board close to the preset center line, and the two side edges of the circuit board are provided with light shielding plates to avoid the direct light of the lamp beads into the lens of the detection camera.

[0014] Optionally, the light device is symmetrically arranged about a symmetric center plane, and the symmetric center plane passes through the preset center line.

[0015] Optionally, the light device is in a strip shape, and the light device extends spirally around the preset center line.

[0016] Optionally, the workpiece outer periphery visual detection device further comprises a conveying device for conveying the workpiece.

[0017] The conveying device comprises a sliding conveying pipe, and the sliding conveying pipe is provided with a positioning device for positioning the workpiece.

[0018] The center of the sliding conveying pipe is parallel to the preset center line.

[0019] Optionally, the workpiece outer periphery visual detection device further comprises a conveying device for conveying the workpiece.

[0020] The positioning device comprises a rotating driving device installed in the inner hole of the sliding conveying pipe, a cam installed on the driving shaft of the rotating driving device, and a bracing column in sliding connection with the sliding conveying pipe.

[0021] The sliding conveying pipe is provided with a mounting through hole perpendicular to the preset center line, the bracing column is slidingly installed in the mounting through hole, and one end of the bracing column abuts against the cam.

[0022] Optionally, an elastic member is sleeved on the bracing column, one end of the elastic member abuts against the inner hole wall of the sliding conveying pipe, and the other end of the elastic member is fixedly connected with the bracing column.

[0023] Optionally, the preset center line is parallel to a horizontal plane, and the center line of the sliding conveying pipe is higher than the preset center line.

[0024] Compared with the prior art, the workpiece outer periphery visual detection device has the following beneficial effects:

[0025] The workpiece outer periphery visual detection device provided by the utility model, through the arrangement of at least three light devices around the preset center line, and the circumferential array arrangement of all the light devices around the preset center line, the 360° outer periphery of the workpiece can be well illuminated, one detection camera is arranged in every two adjacent light devices, and the lens of the detection camera directly faces the area illuminated by the two adjacent light devices, so that the detection camera can well detect the outer periphery surface area of the workpiece, and the mutual cooperation of all the detection cameras can well detect the 360° outer periphery of the workpiece.

[0026] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the installation structure of the visual inspection device for the outer periphery of a workpiece provided in this embodiment of the utility model;

[0029] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure between points A and A;

[0030] Figure 3 This is a three-dimensional structural schematic diagram of the workpiece peripheral visual inspection device provided in this embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the installation structure of the visual inspection device for the outer periphery of a workpiece with a light shield 130 installed, provided in an embodiment of this utility model.

[0032] Figure 5 This is a cross-sectional structural schematic diagram of the conveying device provided in an embodiment of the present utility model;

[0033] Figure 6 yes Figure 5 An enlarged view of position A in the middle.

[0034] Reference numerals: 1. Lighting device; 101. Preset center line; 11. First inclined light-emitting section; 110. Circuit board; 120. Lamp bead; 130. Light shield; 12. Second parallel light-emitting section; 13. Third inclined light-emitting section; 2. Detection camera; 3. Conveying device; 31. Sliding conveying pipe; 32. Positioning device; 321. Rotary drive device; 322. Cam; 323. Support column; 324. Elastic element; 100. Workpiece. Detailed Implementation

[0035] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0036] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0037] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0038] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0039] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0040] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0041] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0042] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0044] In view of the aforementioned deficiencies in existing visual inspection devices, the applicant, based on years of extensive practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, has actively conducted research and innovation in order to create a technology that can overcome the deficiencies in the existing technology and make the visual inspection device more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value has finally been created.

[0045] Please refer to Figures 1 to 3 This utility model provides a workpiece peripheral visual inspection device that can better inspect the outer peripheral surface of the workpiece.

[0046] The workpiece peripheral visual inspection device includes: a lighting device 1, of which at least three are arranged in a circular array around a preset center line 101; and an inspection camera 2, with one inspection camera 2 arranged between every two adjacent lighting devices 1, the light emitted by the lighting device 1 not being able to directly enter the lens of the inspection camera 2; the center line of the lens of the inspection camera 2 is perpendicular to the preset center line 101, and the lens of the inspection camera 2 faces the preset center line 101.

[0047] Specifically, at least three lighting devices arranged in a circular array around the preset center line 101 can illuminate the 360° outer perimeter of the workpiece. Combined with the imaging detection of the inspection camera 2, the 360° outer perimeter of the workpiece can be inspected. Furthermore, the light emitted by the lighting device 1 cannot directly enter the lens of the inspection camera 2, and the lens of the inspection camera 2 can directly face the workpiece for imaging detection. This helps improve the accuracy of the imaging, reduces the influence of stray light, and enhances the accuracy of the inspection imaging.

[0048] It should be noted that if the workpiece is long, it can be inspected in sections until all the circumferential areas of the workpiece have been inspected.

[0049] Optionally, the lighting device 1 includes a first inclined light-emitting segment 11, a second parallel light-emitting segment 12, and a third inclined light-emitting segment 13 connected in sequence; the second parallel light-emitting segment 12 is parallel to a preset center line 101; the first inclined light-emitting segment 11 and the third inclined light-emitting segment 13 are located at opposite ends of the second parallel light-emitting segment 12, and the more the first inclined light-emitting segment 11 is away from the second parallel light-emitting segment 12, the closer it is to the preset center line 101, and the more the third inclined light-emitting segment 13 is away from the second parallel light-emitting segment 12, the closer it is to the preset center line 101.

[0050] Specifically, the second parallel light-emitting segment 12 is parallel to the preset center line 101, and the emitted light can perpendicularly illuminate the outer peripheral surface of the workpiece. The first inclined light-emitting segment 11 and the second inclined light-emitting segment 13 provide supplementary lighting to the workpiece from different directions, such as... Figure 2 As shown, the light emitted by the first inclined light-emitting segment 11 is tilted to the left and illuminates the circumference of the workpiece, while the light emitted by the third inclined light-emitting segment 13 is tilted to the right and illuminates the circumference of the workpiece, thus providing a better lighting effect. The light emission directions of the first inclined light-emitting segment 11, the second parallel light-emitting segment 12, and the third inclined light-emitting segment 13 intersect, which makes it easier for the inspection camera 2 to capture and detect surface defects such as scratches, damage, and cracks on the workpiece.

[0051] Optionally, such as Figure 4As shown, the lighting device 1 includes a circuit board 110 and LED beads 120 arranged at intervals along the extension direction of the circuit board 110. The LED beads 120 are installed on the side of the circuit board 110 near the preset center line 101, and light shields 130 are installed on both sides of the circuit board 110 to prevent the light from the LED beads 120 from directly entering the lens of the inspection camera 2. Specifically, the light shields 130 can effectively prevent the light from the LED beads 120 from directly entering the lens, and can effectively reduce the impact of the light emitted by the LED beads 120 on the inspection camera 2, that is, reduce the impact of external stray light on the inspection camera 2, which is beneficial to improving the imaging clarity of the inspection camera 2.

[0052] Optionally, the lighting device 1 is symmetrically arranged about the center plane of symmetry, and the center plane of symmetry passes through the preset center line 101. This helps to improve the uniformity of light output of the lighting device 1 and avoid the presence of dark areas on the surface of the workpiece 100 during the inspection process.

[0053] Optionally, the lighting device 1 is strip-shaped and extends spirally around a preset center line 101. Specifically, multiple spirally extending lighting devices 1 can further improve the uniformity of lighting and reduce the problem of large differences in light intensity on the surface of the workpiece 100 caused by different lighting devices 1 having different light output brightness, which is conducive to improving the detection accuracy.

[0054] Optionally, the workpiece peripheral visual inspection device further includes a conveying device 3 for conveying the workpiece 100; the conveying device 3 includes a sliding conveying tube 31, and a positioning device 32 for positioning the workpiece 100 is installed in the sliding conveying tube 31; the center of the sliding conveying tube 31 is parallel to the preset center line 101.

[0055] Optionally, such as Figure 5 and Figure 6 As shown, the workpiece peripheral visual inspection device also includes a conveying device 3 for conveying the workpiece 100; the positioning device 32 includes a rotary drive device 321 installed in the inner hole of the sliding conveying pipe 31, a cam 322 installed on the drive shaft of the rotary drive device 321, and a support column 323 slidably connected to the sliding conveying pipe 31; the sliding conveying pipe 31 has an installation through hole perpendicular to the preset center line 101, the support column 323 is slidably installed in the installation through hole, and one end of the support column 323 abuts against the cam 322. Specifically, the rotary drive device 321 drives the cam 322 to rotate, and the rotation of the cam 322 drives the support column 323 to extend and retract along the installation through hole. When it is necessary to position the workpiece, the rotation of the cam 322 drives the support column 323 to extend out of the installation through hole, and the support column 323 presses against the inner wall of the workpiece 100, so that the workpiece 100 is fixed relative to the sliding conveying pipe 31. It should also be noted that the workpiece 100 is sleeved on the sliding conveying pipe 31 and is slidably conveyed along the sliding conveying pipe 31. For example, a push rod can be provided to push the workpiece 100 to slide along the sliding conveyor pipe 31.

[0056] Optionally, an elastic element 324 is sleeved on the tensioning column 323. One end of the elastic element 324 abuts against the inner wall of the sliding conveying pipe 31, and the other end is fixedly connected to the tensioning column 323. Specifically, the elastic element 324 is used to reset the tensioning column 323. After the tensioning column 323 is reset, it no longer abuts against the inner wall of the workpiece 100, so that the workpiece 100 can continue to be conveyed along the sliding conveying pipe 31.

[0057] Optionally, the preset centerline 101 is parallel to the horizontal plane, and the centerline of the sliding conveying pipe 31 is higher than the preset centerline 101, such as... Figure 6 As shown.

[0058] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A visual inspection device for the outer periphery of a workpiece, characterized in that, include: At least three lighting devices (1) are provided, and all the lighting devices (1) are arranged in a circular array around a preset center line (101); A detection camera (2) is provided between each pair of adjacent lighting devices (1). The light emitted by the lighting device (1) cannot directly enter the lens of the detection camera (2). The center line of the lens of the detection camera (2) is perpendicular to the preset center line (101), and the lens of the detection camera (2) faces the preset center line (101).

2. The workpiece peripheral visual inspection device according to claim 1, characterized in that, The lighting device (1) includes a first inclined light-emitting segment (11), a second parallel light-emitting segment (12) and a third inclined light-emitting segment (13) connected in sequence; the second parallel light-emitting segment (12) is parallel to the preset center line (101); The first tilted light-emitting segment (11) and the third tilted light-emitting segment (13) are located at opposite ends of the second parallel light-emitting segment (12). The more the first tilted light-emitting segment (11) is away from the second parallel light-emitting segment (12), the closer it is to the preset center line (101). The more the third tilted light-emitting segment (13) is away from the second parallel light-emitting segment (12), the closer it is to the preset center line (101).

3. The workpiece peripheral visual inspection device according to claim 1, characterized in that, The lighting device (1) includes a circuit board (110) and LED beads (120) arranged at intervals on the circuit board (110) along the extending direction of the circuit board (110); The LED (120) is installed on the side of the circuit board (110) near the preset center line (101), and light shields (130) are installed on both sides of the circuit board (110) to prevent the light from the LED (120) from shining directly into the lens of the detection camera (2).

4. The workpiece peripheral visual inspection device according to claim 1, characterized in that, The lighting device (1) is symmetrically arranged about the center plane of symmetry, and the center plane of symmetry passes through the preset center line (101).

5. The workpiece peripheral visual inspection device according to claim 1, characterized in that, The lighting device (1) is strip-shaped and extends spirally around the preset center line (101).

6. The workpiece peripheral visual inspection device according to claim 1, characterized in that, It also includes a conveying device (3) for conveying the workpiece (100); The conveying device (3) includes a sliding conveying tube (31), and a positioning device (32) for positioning the workpiece (100) is installed in the sliding conveying tube (31); The center of the sliding conveying pipe (31) is parallel to the preset center line (101).

7. The workpiece peripheral visual inspection device according to claim 6, characterized in that, The positioning device (32) includes a rotary drive device (321) installed in the inner hole of the sliding conveying pipe (31), a cam (322) installed on the drive shaft of the rotary drive device (321), and a support column (323) slidably connected to the sliding conveying pipe (31). The sliding conveying pipe (31) has an installation through hole perpendicular to the preset center line (101), the support column (323) is slidably installed in the installation through hole, and one end of the support column (323) abuts against the cam (322).

8. The workpiece peripheral visual inspection device according to claim 7, characterized in that, An elastic element (324) is sleeved on the tensioning column (323). One end of the elastic element (324) abuts against the inner wall of the sliding conveying pipe (31), and the other end is fixedly connected to the tensioning column (323).

9. The workpiece peripheral visual inspection device according to claim 6, characterized in that, The preset center line (101) is parallel to the horizontal plane, and the center line of the sliding conveying pipe (31) is higher than the preset center line (101).

Images