Visual defect detection device for automobile bearing

Abstract

The utility model provides a visual defect detection device for automobile bearings, which comprises a base frame and further comprises a material storing and conveying unit arranged on the base frame, the material storing and conveying unit comprises a material storing box for stacking the bearings and a material pushing device, one side of the material storing box is provided with a material outlet, and the other side of the material storing box is provided with a material outlet. The bearing is pushed out from a discharge hole of the storage box through the pusher; the conveying unit comprises a conveying belt arranged on the base frame, and the conveying belt is used for bearing and conveying bearings from the storage boxes. And the detection unit comprises a plurality of image collectors arranged on the base frame and is used for photographing the bearing for image analysis. According to the visual defect detection device for the automobile bearing, the bearing is pushed by the pusher to enter the conveying belt from the discharge port, the conveying belt conveys the bearing to the position of the detection unit, the image collector photographs the bearing, and unqualified products are detected after image collection. Assembly line type automatic detection of bearing surface defects is realized, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a visual defect detection device for automobile bearings. Background Art

[0002] In the automated production of automotive parts, the use of visual inspection for defects in automotive parts is already a mature and effective technology. A bearing is a mechanical element that limits relative motion to a desired range of motion and reduces friction between moving parts. The design of the bearing can provide free linear motion of the moving part or free rotation around a fixed axis, or it can prevent motion by controlling the vector of the normal force acting on the moving part.

[0003] During the production process and normal operation of bearings, bearings may have defects such as missing balls, surface scratches, surface pits, surface rust, and unqualified rivets. These defects may affect the performance of the bearings, and may cause the bearings to be scrapped, affect the normal operation of the equipment, and bring safety hazards. Visual inspection technology has been widely used in target recognition, position detection, integrity detection, shape and size detection, and surface detection. Due to the large output of micro bearings, and the size, depth and distribution of the pits and scratches on the surface are random, companies currently usually use manual visual inspection methods to complete this work, which not only requires a large amount of labor and low efficiency, but also has a high rate of missed inspections, affecting the quality of the product, and often users return and exchange, which not only causes economic losses, but also has a negative impact on users. The use of computer vision inspection technology for non-contact inspection is the best way to solve this problem. The automatic detection technology of micro bearing surface defects based on CCD image recognition technology is a combination of multidisciplinary high-tech technologies in optics, digital image technology, computer technology, software technology, and automation technology.

[0004] However, the existing visual inspection devices still have the following problems: the existing visual inspection devices usually require the bearings to be manually placed in the inspection area of ​​the inspection device, which cannot achieve streamlined operation and limits the inspection efficiency of the inspection device; the existing visual inspection devices can usually only identify surface defects of bearings, and both qualified and unqualified bearings need to be manually screened and collected, and the degree of automation is low. Utility Model Content

[0005] In view of this, the utility model aims to propose a visual defect detection device for automobile bearings, so as to realize assembly line-type automatic detection of bearing surface defects and improve detection efficiency.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A visual defect detection device for automobile bearings, comprising a base frame, and further comprising:

[0008] A material storage and delivery unit is arranged on the base frame, and the material storage and delivery unit comprises a material storage box and a pusher for stacking bearings, one side of the material storage box has a material discharge port, and the bearing is pushed out from the material discharge port of the material storage box by the pusher;

[0009] A transport unit, comprising a conveyor belt arranged on the base frame, the conveyor belt being used to receive and transport the bearing from the storage box;

[0010] The detection unit includes a plurality of image collectors arranged on the base frame to take pictures of the bearing for image analysis.

[0011] Furthermore, the material storage box has a accommodating cavity so that the bearings can be stacked vertically, the discharge port is located at the bottom of the material storage box and is connected to the accommodating cavity, the height of the discharge port is the same as the thickness of a single bearing, and a limiting groove is provided from top to bottom on the side of the material storage box facing away from the discharge port. Due to the limiting groove, the bearing cannot be taken out from the side of the material storage box.

[0012] Furthermore, the pusher includes a push block and a cylinder driving the push block to move.

[0013] Furthermore, the cross section of the push block is a right-angled trapezoid, and the thickness of the push block on one side away from the cylinder is smaller than that on the other side.

[0014] Furthermore, the conveyor belt is arranged at an angle, and the transport unit also includes baffles arranged on the conveyor belt and located on both sides of the storage box, and the openings at both ends of the two baffles are different in size, wherein the opening at one end of the two baffles close to the storage box is larger than the opening at the other end.

[0015] Furthermore, a plurality of rolling bodies are embedded inside the baffle, and the rolling bodies are evenly arranged along the length direction of the baffle.

[0016] Furthermore, the detection unit includes an observation box arranged on a base frame, the observation box is made of a transparent acrylic plate and has an opening that passes through the direction in which the conveyor belt is set. The bearing can be moved into the observation box by the conveyor belt, and the image collector is used to take a picture of the bearing and perform image analysis.

[0017] Furthermore, the bottom of the observation box can be operated to be opened or closed.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The utility model discloses a visual defect detection device for automobile bearings. The bearing is pushed from a material outlet to a conveyor belt by a pusher. The conveyor belt sends the bearing to the position of a detection unit. An image collector takes a picture of the bearing and uses image processing and recognition analysis technology to detect defects on the bearing surface. After image acquisition, unqualified products are detected, thereby realizing assembly line-type automatic detection of bearing surface defects and improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, top and bottom involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of a visual defect detection device for automobile bearings according to an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of another perspective of the visual defect detection device for automobile bearings according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic structural diagram of a visual defect detection device for automobile bearings according to an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Base frame; 2. Storage box; 20. Discharge port; 21. Accommodating chamber; 22. Limiting groove; 3. Pusher; 30. Push block; 31. Cylinder; 4. Conveyor belt; 5. Baffle; 50. Rolling body; 6. Observation box; 60. Through hole; 7. Image collector; 8. Fill light; 9. First platform; 10. Second platform. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] The present embodiment relates to a visual defect detection device for automobile bearings. In terms of overall structure, the visual defect detection device for automobile bearings includes a base frame 1, a material storage and conveying unit, a transport unit, and a detection unit.

[0031] Among them, the storage and conveying unit is arranged on the base frame 1, and the storage and conveying unit includes a storage box 2 and a pusher 3 for stacking bearings. One side of the storage box 2 has a discharge port 20, and the bearing is pushed out from the discharge port 20 of the storage box 2 through the pusher 3; the transportation unit includes a conveyor belt 4 arranged on the base frame 1, and the conveyor belt 4 is used to receive and transport the bearings from the storage box 2; the detection unit includes a plurality of image collectors 7 arranged on the base frame 1 to take pictures of the bearings for image analysis.

[0032] As shown in the above structure, the bearing is pushed by the pusher 3 and enters the conveyor belt 4 from the discharge port 20. The conveyor belt 4 sends the bearing to the position of the detection unit. The image collector 7 takes a picture of the bearing and uses image processing and recognition analysis technology to detect defects on the bearing surface. After image acquisition, unqualified products are detected, realizing assembly line-type automatic detection of bearing surface defects and improving detection efficiency.

[0033] Based on the above overall design, an exemplary structure of the visual defect detection device for automobile bearings of this embodiment is as follows: Figures 1 to 3 As shown, it is worth mentioning that the above-mentioned storage box 2 has a receiving chamber 21, and multiple bearings can be vertically stacked in the receiving chamber 21, so that the staff can put multiple bearings into the receiving chamber 21 at one time, avoiding multiple loading, saving time and effort. In addition, the discharge port 20 is located at the bottom of the storage box 2 and is connected to the receiving chamber 21, wherein the discharge port 20 is opened toward the conveyor belt 4, and the conveyor belt 4 is connected to the bottom of the discharge port 20, and the pusher 3 pushes the bearing out of the discharge port 20, so that the bearing can fall onto the conveyor belt 4.

[0034] In addition, as a preferred embodiment, in this embodiment, the height of the discharge port 20 is the same as the thickness of a single bearing, so that the number of bearings is one each time the material is discharged. In addition, the height of the discharge port 20 can also be greater than the thickness of one bearing and less than the thickness of two bearings, as long as the number of bearings is guaranteed to be one each time. In order to prevent the bearing from tipping over during the discharge process, and also to facilitate the observation of the number of remaining bearings in the storage box 2, a limiting groove 22 is provided from top to bottom on the side of the storage box 2 facing away from the discharge port 20. Specifically, the limiting groove 22 is provided on the outer wall of the storage box 2, and the width of the limiting groove 22 is less than the diameter of the bearing, so the bearing can be placed in the storage box 2 from the top of the storage box 2, and the bearing cannot be taken out from the side of the storage box 2 because of the limiting groove 22.

[0035] Combination Figure 2 As shown, the pusher 3 includes a push block 30 and a cylinder 31 for driving the push block 30. It is worth mentioning that the detection device of this embodiment has a control unit, and the control unit controls the start of the cylinder 31, the conveyor belt 4 and the image collector 7 for detecting the bearing. The control unit can adopt a PLC controller, and its programming and control are known to those skilled in the art, so it is not described in detail in this embodiment. After the cylinder 31 is started, the output end of the cylinder 31 pushes the push block 30 to move, and the push block 30 pushes the bottom layer of the bearing to move out of the discharge port 20.

[0036] In addition, in order to better push the bearing and retract the push block 30, preferably, the cross-section of the push block 30 is a right-angled trapezoid, and the thickness of the push block 30 on the side away from the cylinder 31 is smaller than the other side. When the push block 30 moves toward the bearing, the thinner end of the push block 30 is limited to contact the bearing and pushes the first bearing of the bottom layer forward. Since the push block 30 has an inclined slope, the second bearing above the bottom layer bearing will fall on the push block 30 due to the weight of the upper bearing. After the first bearing of the bottom layer moves to the conveyor belt 4, the remaining bearings fall back into the storage box 2 due to the limit groove 22 during the retraction of the push block 30, and the cycle is repeated.

[0037] Reference Figure 2 and Figure 3, the conveyor belt 4 is tilted, and the height of the conveyor belt 4 near one end of the storage box 2 is lower than the height of the other end. In addition, the transport unit of this embodiment also includes baffles 5 arranged on the conveyor belt 4 and located on both sides of the storage box 2. The baffles 5 are fixed to the base frame 1, and the openings at both ends of the two baffles 5 are different in size, wherein the openings at one end of the two baffles 5 near the storage box 2 are larger than the openings at the other end. In this way, when the bearing is transported from the conveyor belt 4, the baffles 5 can correct the movement route of the bearing, so that the bearing can smoothly enter the detection unit. In order to prevent the baffle 5 from affecting the movement of the bearing, in this embodiment, a plurality of rolling bodies 50 are embedded in the inner side of the baffle 5, and the rolling bodies 50 are evenly arranged along the length direction of the baffle 5. It should be noted that the rolling bodies 50 are cylindrical and can rotate freely.

[0038] In this embodiment, the detection unit includes an observation box 6 arranged on the base frame 1. The observation box 6 is made of a transparent acrylic plate and has a through hole 60 that penetrates along the setting direction of the conveyor belt 4. The bearing can be moved from the conveyor belt 4 to the observation box 6, and the image collector 7 is used to take pictures of the bearing and perform image analysis. The collected images are processed and recognized to detect the surface quality of the inner and outer rings of the bearing. It should be noted that the observation box 6 is received at the end of the conveyor belt 4, and the observation box 6 is located at the opening of the two baffles 5. After the bearing moves to the end of the conveyor belt 4, the conveyor belt 4 continues to rotate to push the bearing into the observation box 6 so that the image collector 7 can take pictures of the bearing.

[0039] It should also be noted that the number of image collectors 7 in this embodiment is two, of course, multiple can also be set, it is just for example and no specific number limit is made, the two image collectors 7 are respectively arranged above the observation box 6 and arranged obliquely, so as to be able to more comprehensively collect the outer ring and inner ring images of the bearing, and the image collector 7 feeds back the information to the control unit after taking pictures, and the control unit detects the surface quality of the inner ring and outer ring of the bearing through image processing and recognition. In addition, a fill light 8 is arranged above the observation box 6.

[0040] It is worth mentioning that the bottom of the observation box 6 can be operated to be opened or closed. A first platform 9 is provided under the observation box 6 to detect unqualified bearings. The control unit controls the observation box 6 to open, and the unqualified bearings immediately fall onto the first platform 9, while the qualified bearings will remain in the observation box 6. When the next bearing enters the observation box 6, the qualified bearing is pushed to the second platform 10 located in front of the observation box 6.

[0041] The visual defect detection device for automobile bearings described in this embodiment, when in use, the cylinder 31 pushes the push block 30 to move, and the push block 30 pushes the bearings at the bottom layer of the storage box 2 onto the conveyor belt 4. After passing through the conveyor belt 4, the bearings reach the observation box 6, and the image collector 7 takes pictures and performs information analysis to screen out unqualified bearings, thereby realizing assembly line-type automatic detection of bearing surface defects, and automatically screening and collecting qualified bearings and unqualified bearings, with high detection efficiency and simple structure.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A visual defect detection device for automobile bearings, comprising a base frame (1), characterized in that Also includes: A material storage and delivery unit is arranged on the base frame (1), the material storage and delivery unit comprises a material storage box (2) for stacking bearings and a pusher (3), one side of the material storage box (2) is provided with a discharge port (20), and the bearing is pushed out from the discharge port (20) of the material storage box (2) through the pusher (3); A transport unit, comprising a conveyor belt (4) arranged on the base frame (1), the conveyor belt (4) being used to receive and transport the bearings from the storage box (2); The detection unit comprises a plurality of image collectors (7) arranged on the base frame (1) to take pictures of the bearing and perform image analysis.

2. The visual defect detection device for automobile bearings according to claim 1 is characterized in that: The material storage box (2) has a accommodating cavity (21) so that the bearings can be stacked vertically. The discharge port (20) is located at the bottom of the material storage box (2) and is connected to the accommodating cavity (21). The height of the discharge port (20) is the same as the thickness of a single bearing. A limiting groove (22) is provided from top to bottom on the side of the material storage box (2) facing away from the discharge port (20). Due to the limiting groove (22), the bearing cannot be taken out from the side of the material storage box (2).

3. The visual defect detection device for automobile bearings according to claim 1, characterized in that: The pusher (3) comprises a push block (30) and a cylinder (31) for driving the push block (30) to move.

4. The visual defect detection device for automobile bearings according to claim 3 is characterized in that: The push block (30) has a cross section in the form of a right-angled trapezoid, and the thickness of one side of the push block (30) away from the cylinder (31) is smaller than that of the other side.

5. The visual defect detection device for automobile bearings according to claim 1, characterized in that: The conveyor belt (4) is arranged at an angle, and the transport unit also includes baffles (5) arranged on the conveyor belt (4) and located on both sides of the storage box (2), and the openings at both ends of the two baffles (5) are of different sizes, wherein the opening at one end of the two baffles (5) close to the storage box (2) is larger than the opening at the other end.

6. The visual defect detection device for automobile bearings according to claim 5, characterized in that: A plurality of rolling bodies (50) are embedded inside the baffle (5), and the rolling bodies (50) are evenly arranged along the length direction of the baffle (5).

7. The visual defect detection device for automobile bearings according to claim 1, characterized in that: The detection unit comprises an observation box (6) arranged on a base frame (1); the observation box (6) is made of a transparent acrylic plate and has a through hole (60) penetrating along the direction in which the conveyor belt (4) is arranged; the bearing can be moved from the conveyor belt (4) into the observation box (6); and the image collector (7) is used to photograph the bearing and perform image analysis.

8. The visual defect detection device for automobile bearings according to claim 7, characterized in that: The bottom of the observation box (6) can be operated to be opened or closed.

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