A locating pin detection device for welding skids in passenger vehicles

Abstract

This utility model discloses a positioning pin detection device for welding skids in passenger vehicles. Integrated on the skid conveyor line, it includes a brush assembly and a positioning pin detection device located downstream of the brush assembly. The positioning pin detection device includes a base frame; a vision inspection system mounted on the base frame, including a camera and light source for acquiring images of the positioning pins; and a vibration damping component mounted at the bottom of the base frame to isolate the base frame from the ground or mounting platform. This utility model has the advantages of high automation and high detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of passenger vehicle welding skid technology, and specifically discloses a positioning pin detection device for passenger vehicle welding skids. Background Technology

[0002] In welding skid conveyor systems, the inspection of skid positioning pins is a crucial step in ensuring production quality. Current inspection methods primarily rely on manual operation: empty skids are transported to offline maintenance stations via transfer equipment such as conveyors, where they are inspected manually using inspection tools. The accuracy of the positioning pins is visually assessed to determine if it exceeds the inspection tolerance range. If it does, the pin remains in the maintenance area for repair; otherwise, it is returned to the conveyor line.

[0003] However, the existing inspection methods described above have the following drawbacks: 1. Low inspection efficiency: Manual inspection is time-consuming and cannot meet the current 50-second production cycle requirement. Only random sampling is possible, and it is impossible to effectively check all skids. 2. Low overall efficiency: Inspection needs to be performed offline, occupying a significant amount of time and reducing overall production efficiency. 3. Limited accuracy and reliance on human experience: The accuracy of manually operating the inspection tools is limited. Inspection results depend heavily on the operator's experience and judgment, requiring high skill levels and making it difficult to guarantee the stability and accuracy of the inspection.

[0004] To address these issues, there is an urgent need in this field for an automated detection device that can improve detection efficiency and accuracy. Utility Model Content

[0005] To address the aforementioned problems and improve detection efficiency and accuracy, this invention provides an automated device for detecting skid positioning pins, which has the advantages of high automation and high detection efficiency.

[0006] This utility model discloses a positioning pin detection device for welding skids in passenger vehicles. It is integrated into the skid conveyor line and includes a brush assembly and a positioning pin detection device located downstream of the brush assembly. The positioning pin detection device includes a base frame; a vision inspection system installed on the base frame, including a camera and a light source for acquiring images of the positioning pins; and a vibration damping component installed at the bottom of the base frame for isolating the base frame from the ground or installation platform.

[0007] Preferably, the brush assembly includes a bottom support frame; at least one adjustable mounting base mounted on the bottom support frame; a brush fixed to the adjustable mounting base; and a dust collection tray for collecting dust.

[0008] Preferably, the adjustable mounting base adopts a clamp structure, which can adjust the position and angle of the brush.

[0009] Preferably, the adjustable mounting base includes multiple units, each of which includes a first connecting shaft, a second connecting shaft, and a third connecting shaft; the second connecting shaft is connected to the first connecting shaft via a clamp, and the central axis of the second connecting shaft is perpendicular to the central axis of the first connecting shaft; the third connecting shaft is connected to the second connecting shaft via a clamp, and the central axis of the third connecting shaft is perpendicular to the central axis of the second connecting shaft; the brush is connected to the third connecting shaft; the first connecting shaft, the second connecting shaft, and the third connecting shaft can all be rotated and adjusted around their own axes.

[0010] Preferably, the visual inspection system further includes an adjustable support mounted on the base frame, and the camera and light source are fixed on the adjustable support.

[0011] Preferably, the adjustable support adopts a clamp structure for adjusting the alignment position of the camera and the light source.

[0012] Preferably, the adjustable support includes multiple supports, each of which includes a first connecting shaft, a second connecting shaft, and a third connecting shaft; the second connecting shaft is connected to the first connecting shaft via a clamp, and the central axis of the second connecting shaft is perpendicular to the central axis of the first connecting shaft; the third connecting shaft is connected to the second connecting shaft via a clamp, and the central axis of the third connecting shaft is perpendicular to the central axis of the second connecting shaft; the camera and the light source are connected to the third connecting shaft; the first connecting shaft, the second connecting shaft, and the third connecting shaft can all be rotated and adjusted around their own axes.

[0013] Preferably, the clamp is cubic in shape and has two through holes that are perpendicular to each other and have opposite faces.

[0014] Preferably, the vibration damping assembly includes an airbag shock absorber.

[0015] Preferably, the positioning pin detection device is installed below the roller bed of the skid conveyor line.

[0016] The beneficial effects of this utility model are: This utility model realizes online full inspection and has high production efficiency: It integrates all cleaning and inspection processes into the main production line, and the skid can complete the inspection without going offline, realizing 100% full coverage inspection, fully adapting to the production rhythm, and solving the problems of low sampling rate and low overall efficiency of the existing technology.

[0017] Furthermore, this invention boasts high detection accuracy and reliability. It employs a vision inspection system to replace manual visual inspection, eliminating errors and instabilities caused by human experience. Simultaneously, the unique vibration damping component design effectively isolates the interference of production line vibrations on camera imaging, ensuring the stability and accuracy of the detection data.

[0018] This utility model also has the advantages of flexible adjustment and strong applicability: the adjustment mechanism of both the brush assembly and the vision inspection system adopts a three-dimensional adjustment structure consisting of a cubic clamp and three mutually perpendicular connecting shafts. This structure can realize all-round rotation and translation adjustment, with accurate positioning, reliable locking, simple structure, and easy on-site quick installation and debugging.

[0019] Finally, this utility model has a high degree of automation and strong traceability. The entire testing process does not require manual intervention, and the test data can be automatically recorded, saved and analyzed, which facilitates the traceability and management of product quality and improves the intelligence level of the production line. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments disclosed in this invention, the accompanying drawings of the embodiments will be briefly described below. These drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the brush assembly in this utility model.

[0023] Figure 3 This is a schematic diagram of the positioning pin detection device in this utility model.

[0024] Figure 4 This is a schematic diagram of the positioning mechanism in this utility model. Figure 5 This is a schematic diagram of the operation of the positioning pin detection device in this utility model.

[0025] In the diagram: 1-Brush assembly, 1.1-Bottom support frame, 1.2-Adjustable mounting base, 1.3-Brush, 1.4-Dust collection tray, 2-Positioning pin detection device, 2.1-Base frame, 2.2-Vibration damping assembly, 2.3-Adjustable support, 2.4-Camera and light source. Detailed Implementation

[0026] The technical solutions, including preferred solutions, of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1-5As shown, the positioning pin detection device for welding skids in passenger vehicles disclosed in this utility model is integrated into the skid conveyor line. The device mainly consists of two functional components: a brush assembly 1 located upstream of the detection station along the skid conveying direction and a positioning pin detection device 2 located downstream.

[0028] Please refer to the description of the structure and connection relationship of the brush assembly 1 of this utility model. Figure 2 The brush assembly 1 is the pretreatment unit of this device, and its specific structure is as follows: Bottom support frame 1.1: As the base of the entire brush assembly 1, it is fixed to the workshop floor or the steel platform next to the conveyor line by means of anchor bolts, etc., to provide a stable installation foundation for the upper components.

[0029] Adjustable mounting base 1.2: Multiple adjustable mounting bases 1.2 are fixed to the uprights and crossbeams of the bottom support frame 1.1. This is the core mechanism for achieving precise three-dimensional adjustment of the brush 1.3. Its internal structure is as follows: Each adjustable mounting base 1.2 includes a first connecting shaft, a second connecting shaft, and a third connecting shaft. One end of the first connecting shaft is fixed to the bottom support frame 1.1.

[0030] A clamp connects the first connecting shaft and the second connecting shaft. The clamp is cubic in shape and has two mutually skewed and perpendicular through holes. The first connecting shaft passes through one of the through holes, and the second connecting shaft passes through the other through hole. When the fastening bolts on the clamp are tightened, the central axis of the second connecting shaft remains perpendicular to the central axis of the first connecting shaft.

[0031] Similarly, another cubic clamp connects the second connecting shaft and the third connecting shaft in the same way, such that the central axis of the third connecting shaft is perpendicular to the central axis of the second connecting shaft.

[0032] By loosening the clamps, the first, second, and third connecting shafts can all rotate freely around their own axes, thus achieving multi-degree-of-freedom adjustment.

[0033] Brush 1.3: The handle of brush 1.3 is fixed to the end of the third connecting shaft of the adjusting mechanism. By adjusting the adjustable mounting base 1.2, the bristles of brush 1.3 can be precisely aligned and contact the locating pin on the skid.

[0034] Ash receiving tray 1.4: Ash receiving tray 1.4 is installed at the lower part of the bottom support frame 1.1, directly below the working area of ​​brush 1.3, and is used to collect dust and debris that fall during the cleaning process.

[0035] Please refer to the description of the structure and connection relationship of the positioning pin detection device 2 of this utility model. Figure 3The positioning pin detection device 2 is the core detection unit of this device, and its specific structure is as follows: 2.1 Base Frame: Serving as the base of the detection unit, it is installed below the roller bed of the skid conveyor line and has a frame structure, providing an independent and stable mounting platform for the camera and light source.

[0036] Vibration damping component 2.2: Vibration damping component 2.2 is installed between the bottom support leg of the base frame 2.1 and the ground or mounting platform. In this embodiment, it is preferably a plurality of airbag shock absorbers. These airbag shock absorbers flexibly isolate the base frame 2.1 from external vibration sources, ensuring that vibrations generated during the operation of the conveyor line are not transmitted to the camera and light source 2.4.

[0037] Adjustable support 2.3: Multiple adjustable supports 2.3 are fixed to the crossbeam of the base frame 2.1. Their function is to provide three-dimensional adjustment capability for the camera and light source 2.4. Their internal structure is exactly the same as the aforementioned adjustable mounting base 1.2, that is, they also adopt a three-axis vertical adjustment mechanism consisting of the first, second, and third connecting shafts and two cubic clamps.

[0038] Camera and Light Source 2.4: The camera and light source 2.4 are fixed as a single module at the end of the third connecting shaft of the adjustable support 2.3. By adjusting the adjustable support 2.3, the shooting angle, focusing distance, and lighting position of the camera 2.4 can be precisely adjusted to perfectly align it with the positioning pin on the skid, thereby obtaining high-quality inspection images.

[0039] The specific workflow and data processing method of this utility model are as follows: Step 1: Online Cleaning. As the skids carrying the body parts move along the conveyor line, they first pass the brush assembly 1 located upstream. (Example...) Figure 2 As shown, the multiple brushes 1.3 on the brush assembly 1 have been pre-adjusted to the optimal position by the adjustable mounting base 1.2, which can effectively clean the positioning pins on the skid, removing dust and impurities from their surface, and providing a clean inspection object for subsequent accurate inspection. The dust that falls off during cleaning is collected by the dust collection tray 1.4.

[0040] Step 2: Precise Positioning. After cleaning, the skid continues forward, entering the station of the downstream positioning pin detection device 2. At this time, as... Figure 4 As shown and Figure 5 As shown, a positioning mechanism is also installed on the conveyor line. The positioning mechanism, such as a pneumatic pin or a stop, is a conventional technology in the field. It can accurately stop and position the skid to ensure that the skid is in the exact same position every time it is tested. This is the key to ensuring the repeatability of the test data.

[0041] Step 3: Photo Inspection. After the skid positioning is completed, the positioning pin detection device 2 begins to operate. For example... Figure 3 As shown, the camera and light source 2.4 mounted on the adjustable support 2.3 are activated and take pictures of the positioning pins. The vision system then analyzes the acquired high-definition images and automatically calculates key geometric data such as the spacing and position coordinates of the positioning pins through algorithms. These measured data are then compared with preset standard values ​​and tolerance ranges, thereby achieving 100% online inspection of each skid.

[0042] Step 4: Data Processing and Distribution. Finally, based on the comparison of the detection results, the central control system, such as a PLC, performs intelligent distribution processing on the skids: Acceptance status: If the test results are within the preset acceptable tolerance range, the skid is allowed to continue to the next station and participate in production normally.

[0043] Minor deviations: If the test result slightly exceeds the acceptable tolerance range, the central control computer records the skid number and deviation data for subsequent quality traceability and equipment wear trend analysis. At the same time, the skid continues to be released to the next workstation to avoid production interruption.

[0044] Severe out-of-tolerance situation: If the test result is significantly outside the acceptable tolerance range, it indicates that the locating pin of the skid is severely worn or damaged. While recording the data, the central control unit will issue an instruction to transfer the skid from the main conveyor line to the rework area for offline maintenance.

[0045] In terms of structural details, both the adjustable mounting base 1.2 and the adjustable support 2.3 employ a three-dimensional adjustment mechanism consisting of a cubic clamp and three mutually perpendicular and rotatable connecting shafts. The specific structure has been detailed in the claims and will not be repeated here. This structure ensures that the brush, camera, and light source can be precisely and stably adjusted to their optimal working positions. Simultaneously, the vibration damping component 2.2, preferably an airbag shock absorber, effectively isolates production line vibrations, providing a reliable guarantee for stable and clear imaging by the camera.

[0046] In summary, this utility model, through a fully automated process integrating online cleaning, positioning, detection, and intelligent diversion, successfully solves the problems of low efficiency, poor accuracy, and reliance on manual labor in the detection of positioning pins in the prior art. It is an automated detection device with significant progressive value.

[0047] It will be readily understood by those skilled in the art that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, substitutions, improvements, etc., made under the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A positioning pin detection device for welding skids in passenger vehicles, characterized in that, It is integrated on the skid conveyor line and includes a brush assembly (1) and a positioning pin detection device (2) located downstream of the brush assembly (1). The positioning pin detection device (2) includes a base frame (2.1); a vision inspection system installed on the base frame (2.1) including a camera and a light source (2.4) for acquiring positioning pin images; and a vibration damping assembly (2.2) installed at the bottom of the base frame (2.1) for isolating the base frame (2.1) from the ground or the installation platform.

2. The positioning pin detection device for welding skids in passenger vehicles according to claim 1, characterized in that, The brush assembly (1) includes a bottom support frame (1.1); at least one adjustable mounting base (1.2) mounted on the bottom support frame (1.1); a brush (1.3) fixed on the adjustable mounting base (1.2); and a dust collection tray (1.4) for collecting dust.

3. The positioning pin detection device for welding skids in passenger vehicles according to claim 2, characterized in that, The adjustable mounting base (1.2) adopts a clamp structure, which can adjust the position and angle of the brush (1.3).

4. The positioning pin detection device for welding skids in passenger vehicles according to claim 3, characterized in that, The adjustable mounting base (1.2) includes multiple units, each of which includes a first connecting shaft, a second connecting shaft, and a third connecting shaft; the second connecting shaft is connected to the first connecting shaft by a clamp, and the central axis of the second connecting shaft is perpendicular to the central axis of the first connecting shaft; the third connecting shaft is connected to the second connecting shaft by a clamp, and the central axis of the third connecting shaft is perpendicular to the central axis of the second connecting shaft; the brush (1.3) is connected to the third connecting shaft; the first connecting shaft, the second connecting shaft, and the third connecting shaft can all be rotated and adjusted around their own axes.

5. The positioning pin detection device for welding skids in passenger vehicles according to claim 1, characterized in that, The visual inspection system also includes an adjustable support (2.3) mounted on the base frame (2.1), and the camera and light source (2.4) are fixed on the adjustable support (2.3).

6. The positioning pin detection device for welding skids in passenger vehicles according to claim 5, characterized in that, The adjustable support (2.3) adopts a clamp structure and is used to adjust the alignment position of the camera and light source (2.4).

7. The positioning pin detection device for welding skids in passenger vehicles according to claim 6, characterized in that, The adjustable support (2.3) includes multiple supports, each of which includes a first connecting shaft, a second connecting shaft, and a third connecting shaft; the second connecting shaft is connected to the first connecting shaft by a clamp, and the central axis of the second connecting shaft is perpendicular to the central axis of the first connecting shaft; the third connecting shaft is connected to the second connecting shaft by a clamp, and the central axis of the third connecting shaft is perpendicular to the central axis of the second connecting shaft; the camera and light source (2.4) are connected to the third connecting shaft; the first connecting shaft, the second connecting shaft, and the third connecting shaft can all be rotated and adjusted around their own axes.

8. The locating pin detection device for welding skids in passenger vehicles according to claim 4 or 7, characterized in that, The clamp is cubic in shape and has two through holes that are perpendicular to each other.

9. The positioning pin detection device for welding skids in passenger vehicles according to claim 1, characterized in that, The vibration damping assembly (2.2) includes an airbag shock absorber.

10. The locating pin detection device for welding skids in passenger vehicles according to claim 1, characterized in that, The positioning pin detection device (2) is installed below the roller bed of the skid conveyor line.

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