Screw locking skew detection equipment

Abstract

According to the technical scheme, the screw locking skew detection equipment is characterized in that the screw locking skew detection equipment comprises a driving mechanism and a visual detection mechanism, the driving mechanism is used for driving the visual detection mechanism to move, and the driving mechanism comprises a z-axis driving part and further comprises a y-axis driving part and / or an x-axis driving part; the visual inspection mechanism comprises a first shooting camera and a second shooting camera which are used for shooting a to-be-detected product, an included angle is formed between shooting angles of the first shooting camera and the second shooting camera, and the visual inspection mechanism further comprises a visual system which is used for performing consistency judgment on images acquired by the first shooting camera and the second shooting camera; therefore, whether the screw locking is skewed or not is judged. According to the utility model, the visual inspection mechanism photographs the locking screw from two different visual angles, and the visual system compares whether the screw is inclined, so that the accuracy and the efficiency of detection are improved, the reject ratio of products is reduced, and a powerful guarantee is provided for stable and efficient operation of an automatic assembly line.

Description

Technical Field

[0001] This utility model relates to the field of screw fastening equipment technology, and more specifically to a screw fastening misalignment detection device. Background Technology

[0002] Existing screw fastening equipment may result in screw misalignment after screw fastening. Although the fastening system is equipped with functions for detecting screw height and stripped threads, these detection methods mainly focus on the tightness of the screw and the condition of the threads, and cannot detect screw misalignment. This can cause instability and failure in subsequent process links, resulting in overall product defects.

[0003] Most testing devices on the market do not have a skew defect detection function. 3D line scanning detection is expensive and unstable, and cannot meet production needs. If manual visual inspection is used, the product quality is inconsistent and the efficiency is very low. Utility Model Content

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] A screw fastening misalignment detection device includes a drive mechanism and a vision inspection mechanism. The drive mechanism is used to drive the vision inspection mechanism to move. The drive mechanism includes a z-axis drive component, a y-axis drive component, and / or an x-axis drive component. The vision inspection mechanism includes a first camera and a second camera for taking pictures of the product to be inspected. The shooting angles of the first camera and the second camera have an included angle.

[0006] The present invention is further configured such that the shooting angles of the first shooting camera and the second shooting camera are perpendicular.

[0007] The present invention is further configured such that: the driving mechanism includes a support frame, a y-axis driving component is disposed on the support frame, a z-axis driving component is disposed on the y-axis driving component, and the vision detection mechanism is disposed on the z-axis driving component.

[0008] The present invention is further configured such that: the y-axis drive component is a first drive module arranged in the horizontal direction, and the z-axis drive component is a second drive module arranged in the vertical direction; the first drive module drives the second drive module to move in the horizontal direction, and the second drive module drives the vision inspection mechanism to move in the vertical direction.

[0009] The present invention is further configured such that both the first drive module and the second drive module include a motor and a lead screw.

[0010] The present invention is further configured such that: the visual inspection mechanism includes a mounting plate, a right-angled triangular block is provided on the mounting plate, and the first camera and the second camera are respectively disposed on the two right-angled sides of the right-angled triangular block.

[0011] The present invention is further configured such that: a first light source and a second light source are provided on the mounting plate, the first light source irradiates the first camera, the second light source irradiates the second camera, and the product to be tested is located at the intersection of the line connecting the first camera and the first light source and the line connecting the second camera and the second light source.

[0012] The present invention is further configured to include a lifting fixture plate, wherein the lifting fixture plate is provided with a plurality of positioning fixtures for fixing the product to be tested.

[0013] Compared with the prior art, the present invention has at least the following advantages:

[0014] 1. By setting up two sets of cameras at certain angles to take pictures of the screws from two different visual angles, the vision system compares the pictures to check whether the screws are crooked, which improves the accuracy and efficiency of inspection, reduces the product defect rate, and provides a strong guarantee for the stable and efficient operation of automated assembly lines.

[0015] 2. The vision inspection mechanism is moved sequentially to the product to be inspected by the Y-axis drive, and the vision inspection mechanism is lowered by the Z-axis drive to take pictures and inspect the product. The equipment inspection is automated, improving production efficiency. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of this embodiment;

[0017] Figure 2 This is the first perspective image from a visual inspection agency;

[0018] Figure 3 This is the second perspective view from the visual inspection agency;

[0019] Figure 4 It is a top-down view of the product when it was photographed;

[0020] Figure 5 This is a schematic diagram of the positioning fixture.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Support frame; 2. Z-axis drive component; 3. Y-axis drive component; 4. Vision inspection mechanism; 401. First camera; 402. Second camera; 403. Mounting plate; 404. Right-angled triangle block; 405. First light source; 406. Second light source; 5. Lifting fixture plate; 6. Positioning fixture; 7. Product to be inspected; 8. Screws. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] A screw fastening misalignment detection device, such as Figures 1 to 3 As shown, the device includes a drive mechanism and a vision inspection mechanism 4. The drive mechanism is used to move the vision inspection mechanism 4. The drive mechanism includes a z-axis drive component 2, a y-axis drive component 3, and / or an x-axis drive component, so that the drive mechanism can move the vision inspection mechanism 4 in the horizontal and vertical directions. The vision inspection mechanism 4 includes a first imaging camera 401 and a second imaging camera 402 for taking pictures of the product 7 to be inspected. The shooting angles of the first imaging camera 401 and the second imaging camera 402 are at an angle.

[0026] The visual inspection mechanism also includes a vision system used to determine the consistency between the first screw image acquired by the first camera and the second screw image acquired by the second camera, in order to determine whether the screw is misaligned. If the screw's feature information in the images captured by the two cameras is consistent, such as center position deviation and shape changes being within the normal range, then the screw can be considered not misaligned. Conversely, if there is a significant difference in the image analysis results of the two cameras, such as one camera showing a normal screw center position while the other camera shows a significant deviation, then it is very likely that the screw is misaligned. The vision system in this embodiment is from Hangzhou Hikrobot Co., Ltd., version information: V4.4.0 Build20240813, which belongs to the prior art.

[0027] The first camera 401 and the second camera 402 perform double-layer reconstructed angle imaging detection on the product surface. The captured images are then compared by a vision system to determine whether the screws 8 are misaligned, thereby judging whether the product is a good product. In this embodiment, the shooting angles of the first camera 401 and the second camera 402 are preferably perpendicular, that is, the angle between the line connecting the first camera 401 to the screw 8 and the line connecting the second camera 402 to the screw 8 is a right angle.

[0028] The driving mechanism includes a support frame 1, on which a y-axis drive component 3 is mounted. A z-axis drive component 2 is mounted on the y-axis drive component 3. The visual inspection mechanism 4 is mounted on the z-axis drive component 2. Therefore, the y-axis drive component 3 drives the z-axis drive component 2 to move along the y-axis, and the z-axis drive component 2 then drives the visual inspection mechanism 4 to move along the z-axis. In this embodiment, the products to be inspected 7 are arranged in a line along the y-axis without an x-axis drive component. In other embodiments, the y-axis drive component 3 can be replaced with an x-axis drive component as needed, or both y-axis and x-axis drive components can be used simultaneously. For example, the x-axis drive component can be mounted on the y-axis drive component 3, and the z-axis drive component 2 can be mounted on the x-axis drive component, thus achieving three-axis movement of the visual inspection mechanism 4.

[0029] The y-axis drive unit 3 is a first drive module arranged in the horizontal direction, and the z-axis drive unit 2 is a second drive module arranged in the vertical direction. The first drive module drives the second drive module to move in the horizontal direction (y-axis), and the second drive module drives the vision inspection mechanism to move in the vertical direction (z-axis).

[0030] In this embodiment, both the preferred first drive module and the preferred second drive module are motor modules, including a motor and a lead screw. The motor drives the lead screw to rotate, thereby driving the slider to move. The second drive module is fixed on the slider of the first drive module, and the vision inspection mechanism 4 is fixed on the slider of the second drive module.

[0031] The visual inspection mechanism 4 includes a mounting plate 403, which is fixed on the slider of the second drive module. A horizontally placed right-angled triangle block 404 is fixed on the mounting plate 403. The first camera 401 and the second camera 402 are respectively fixed on the two right-angled sides of the right-angled triangle block 404, so that the first camera 401 and the second camera 402 form a precise right-angled angle.

[0032] like Figure 2 , Figure 4 , Figure 5 As shown, a first light source 405 and a second light source 406 are provided on the mounting plate 403. The first light source 405 illuminates the first camera 401, and the second light source 406 illuminates the second camera 402. The product 7 to be tested is located at the intersection of the line connecting the first camera 401 and the first light source 405, and the line connecting the second camera 402 and the second light source 406, i.e., at the intersection of the crosshairs. In this embodiment, the first light source 405 and the second light source 406 are surface light sources, and the shooting directions of the first camera 401 and the second camera 402 are perpendicular to the surface light sources.

[0033] The testing equipment also includes a lifting fixture plate 5, on which several positioning fixtures 6 are provided for fixing the product 7 to be tested. These positioning fixtures 6 are arranged at equal intervals along the y-axis. During testing, the y-axis drive 3 sequentially moves the z-axis drive 2 above the positioning fixtures 6. The z-axis drive 2 then lowers the vision inspection mechanism 4, causing the first camera 401, the second camera 402, the first light source 405, and the second light source 406 to surround the positioning fixtures 6 and photograph the product for testing. Both the support frame 1 and the lifting fixture plate 5 are installed on the product production line, and the testing equipment is a process within that production line.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw fastening misalignment detection device, characterized in that: The device includes a drive mechanism and a vision inspection mechanism. The drive mechanism is used to move the vision inspection mechanism. The drive mechanism includes a z-axis drive component, a y-axis drive component, and / or an x-axis drive component. The vision inspection mechanism includes a first camera and a second camera for taking pictures of the product to be inspected. The first camera and the second camera have an angle between their shooting angles. The vision inspection mechanism also includes a vision system for judging the consistency between a first screw image acquired by the first camera and a second screw image acquired by the second camera, so as to determine whether the screw is misaligned.

2. The screw fastening misalignment detection device according to claim 1, characterized in that: The shooting angles of the first and second cameras are perpendicular.

3. The screw fastening misalignment detection device according to claim 1, characterized in that: The driving mechanism includes a support frame, on which a y-axis driving component is disposed, and on which a z-axis driving component is disposed, and the vision detection mechanism is disposed on the z-axis driving component.

4. The screw fastening misalignment detection device according to claim 3, characterized in that: The y-axis drive is a first drive module arranged in the horizontal direction, and the z-axis drive is a second drive module arranged in the vertical direction. The first drive module drives the second drive module to move in the horizontal direction, and the second drive module drives the vision inspection mechanism to move in the vertical direction.

5. The screw fastening misalignment detection device according to claim 4, characterized in that: Both the first drive module and the second drive module include a motor and a lead screw.

6. The screw fastening misalignment detection device according to claim 1, characterized in that: The visual inspection mechanism includes a mounting plate with a right-angled triangular block. The first camera and the second camera are respectively mounted on the two right-angled sides of the right-angled triangular block.

7. The screw fastening misalignment detection device according to claim 6, characterized in that: The mounting plate is provided with a first light source and a second light source. The first light source illuminates the first camera, and the second light source illuminates the second camera. The product to be tested is located at the intersection of the line connecting the first camera and the first light source and the line connecting the second camera and the second light source.

8. The screw fastening misalignment detection device according to claim 1, characterized in that: It also includes a lifting fixture plate, which is provided with several positioning fixtures for fixing the product to be tested.

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