Automobile safety airbag cover plate weakening groove detection equipment
By combining CCD visual detection and coaxial laser displacement sensor technology in the automotive airbag cover detection equipment, the problems of low detection accuracy and difficult operation in the prior art are solved, and efficient and accurate weakened groove detection is achieved, ensuring automobile safety and production efficiency.
Patent Information
- Application Number
- CN202422207851.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The prior art is difficult to achieve efficient and accurate detection of the weakened groove of the automobile airbag cover plate, resulting in low measurement accuracy, difficult operation and not suitable for the detection of face-up products, posing safety hazards.
Using detection equipment including CCD visual detection components and coaxial laser displacement sensors, automated detection is realized through the coordination of the motion module and the tire tool, and errors in manual operation are reduced.
It improves detection accuracy and efficiency, ensures the quality of the car airbag cover, reduces production costs, and reduces safety hazards.
Smart Images
Figure CN223050627U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile parts production, in particular to an inspection device for the weakening groove of an automobile airbag cover plate. Background Art
[0002] In the traditional thickness inspection of the weakening groove (weakening frame) of an automobile airbag cover plate, full inspection cannot be achieved in most cases. Inspectors can only damage the injection-molded airbag cover plate by means of initial, intermediate, and final sampling inspections and measure it with a caliper, and the measurement accuracy needs to be controlled within an error range of 0.1 mm. Once there are defects, batch investigation and traceability are required. Moreover, most of the airbag frame materials are TPO materials with high tensile strength and good wear resistance. Therefore, it is difficult to damage manually, and this measurement method is difficult to operate and has low efficiency, which greatly affects the production efficiency.
[0003] For the common weakening groove of the airbag cover plate in the prior art, the existing wall thickness inspection method is the coordinate measuring method. The three-dimensional contour data of the measured part is obtained by a coordinate measuring machine, and contour reconstruction is carried out on one side of the part surface by using fitting or interpolation technology. Then, by calculating the distance from the discrete points on the other side to the reconstructed contour surface, the thickness distribution of the part can be obtained. Although this method has relatively high measurement accuracy, the overall price of the equipment is relatively expensive, it occupies a relatively large space, and it is not suitable for the inspection of modified products.
[0004] The airbag cover plate is an important safety component of an automobile. In production traceability, usually only the production batch is traced, and there is no quantitative traceability for its special characteristics (the thickness of the weakening groove). Therefore, once a safety accident occurs, it is very difficult to have theoretical data support for the remaining thickness of its weakening groove, which poses a huge safety hazard to automobile safety components. Content of the Utility Model
[0005] Aiming at the deficiencies of the prior art, the utility model provides an inspection device for the weakening groove of an automobile airbag cover plate, including a CCD vision inspection component and a coaxial laser displacement sensor, so as to solve the above technical problems.
[0006] The technical solution adopted by the utility model is as follows:
[0007] An inspection device for the weakening groove of an automotive airbag cover plate, comprising a bottom plate, a motion module, a CCD vision inspection component, a coaxial laser displacement sensor, and a tooling. It is characterized in that the motion module includes a transverse slide rail, a longitudinal slide rail, and a slider. The slider is slidably mounted on the longitudinal slide rail, the longitudinal slide rail is slidably mounted on the transverse slide rail, the transverse slide rail is fixedly mounted on the bottom plate, the slider and the longitudinal slide rail are respectively driven by the motors connected to them. The CCD vision inspection component and the coaxial laser displacement sensor are mounted and connected to the slider on the longitudinal slide rail through a connection structure. The CCD vision inspection component is mounted and connected with a camera and is provided with an output end. The coaxial laser displacement sensor is mounted and connected with a laser head and is provided with an output end. The tooling includes a bracket and a tooling body. A hollow window is opened in the middle of the tooling body and is fixed above the bracket. The bracket is fixed on the bottom plate.
[0008] The CCD vision inspection component is electrically connected to an industrial control computer.
[0009] The motion module is electrically connected to an industrial control computer.
[0010] The inspection device for the weakening groove of the automotive airbag cover plate of the present utility model is scientifically designed, reasonably structured, occupies a small space, has good appearance quality, is convenient to use, functions safely and reliably, has high measurement accuracy, ensures the quality of the automotive airbag cover plate, and has a low manufacturing cost. Description of the Drawings
[0011] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application.
[0012] Figure 1 It is a schematic diagram of the inspection device for the weakening groove of the automotive airbag cover plate of the present utility model;
[0013] Figure 2 It is a schematic diagram of the motion component;
[0014] Figure 3 It is a schematic diagram of the coaxial laser displacement sensor;
[0015] Figure 4 It is a schematic diagram of the tooling;
[0016] Figure 5 It is a top view schematic diagram of the tooling and the airbag cover plate;
[0017] Figure 6 Schematic diagram of the thickness detection principle of the weakening groove;
[0018] In the figure: 1 - bottom plate; 2 - motion module; 21 - horizontal slide rail; 22 - vertical slide rail; 23 - slider; 3 - CCD vision detection component; 4 - coaxial laser displacement sensor; 5 - tooling; 51 - bracket; 52 - tooling body; 6 - airbag cover; 61 - weakening groove; A - upper end distance; B - lower end distance; C - two - end distance; t - weakening groove thickness. Detailed implementation manners
[0019] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described below are only used to explain the present utility model. In these descriptions, the key words that need to be noted include "CCD vision detection", "coaxial laser displacement sensor", "motion component", "tooling", "tooling body", "empty window", "weakening groove", etc. These are only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as a limitation to the present utility model.
[0020] As Figure 1 shown, the weakening groove detection device for the airbag cover of an automobile of the present utility model includes a bottom plate 1, a motion module 2, a CCD vision detection component 3, a coaxial laser displacement sensor 4 and a tooling 5.
[0021] In this embodiment, the motion module 2 selects a product of Schaeffler Group USA, model LMA90 - L483 - B - D1 - C1 - P1 - H - S3, the CCD vision detection component 3 selects an industrial camera CA - HF2100C of Keyence Corporation of Japan, and the coaxial laser displacement sensor 4 selects a product of the CL - 3000 series of Keyence Corporation of Japan, and the sensor laser head model is CL - P070 (70mm point - type). The above products can all be replaced by other domestic similar products.
[0022] Referring to Figure 2 shown, the motion module 2 includes a horizontal slide rail 21, a vertical slide rail 22 and a slider 23. The slider 23 is slidably installed on the vertical slide rail 22, the vertical slide rail 22 is slidably installed on the horizontal slide rail 21, the horizontal slide rail 21 is fixedly installed on the bottom plate 1, and the slider 23 and the vertical slide rail 22 are respectively driven by the motors connected to them. The CCD vision detection component 3 and the coaxial laser displacement sensor 4 are installed and connected to the slider 23 on the vertical slide rail 22 through a connection structure (plate). The CCD vision detection component is installed and connected with a camera and has an output end. The coaxial laser displacement sensor 4 is installed and connected with a laser head and has an output end. As Figure 4 shown, the tooling 5 includes a bracket 51 and a tooling body 52. An empty window is opened in the middle of the tooling body 52, and it is fixed above the bracket 51. The bracket 51 is fixed on the bottom plate 1.
[0023] When the utility model is used, the airbag cover plate 6 will be detected as Figure 1 The CCD visual detection component and the coaxial laser displacement sensor are located at the initial position in the middle of the airbag cover 6 in the tire 5. Figure 5 As shown, in this embodiment, the main body thickness of the airbag cover 6 is 3mm, and its weakened groove 61 is in the shape of a capital letter H, and its thickness (weakened groove thickness t) is 0.5±0.1mm. First, the camera of the CCD visual detection component is used to capture the image of the airbag cover 6 and its weakened groove. Since the intensity of the light required to be recognized by the CCD visual detection component, that is, the intensity of the weakened groove light, is set in advance, the light reflected by the photographed object is imaged on the CCD through the lens, and the characteristic position of the weakened groove of the detected object will be identified. Then, the image signal is converted into a digital signal through an AD converter and transmitted to the connected industrial computer through the output port. The industrial computer controls the connected motor according to the above signal to drive the slider 23 and the longitudinal slide rail 22 of the motion module 2 to slide, so that the coaxial laser displacement sensor can be aligned with the weakened groove 61 of the airbag cover 6, and move along the H-shaped weakened groove 61 of the airbag cover 6 to detect its thickness. Its detection principle is as follows Figure 6 As shown:
[0024] See also Figure 3 As shown, there is a set of coaxial laser displacement sensors 4 at the top and bottom, aiming at the weakened groove 61 of the airbag cover 6, as shown in FIG. Figure 6 As shown, the upper end distance A and the lower end distance B are measured by the coaxial laser displacement sensor 4 laser head respectively, and the data is transmitted to the connected computer processing system through the output end. The weakening groove thickness t is calculated by the distance C between the two ends of the upper and lower laser heads, that is, t=C-(A+B), to determine whether it is qualified. Even if the object to be measured swings up and down during the measurement, since (A+B) is fixed, no measurement error will occur. The coaxial laser displacement sensor 4 emits a light beam up and down, and its accuracy can reach the micron level. The motion module 2, the CCD visual detection component 3, the coaxial laser displacement sensor 4 and the mold 5 cooperate with each other to realize the automation process and reduce the error of manual operation. After the detection is completed, the CCD visual detection component and the coaxial laser displacement sensor 4 return to the initial position with the motion module 2.
[0025] The above is only one embodiment of the present invention. For those skilled in the art, the present invention may have other embodiments with various modifications and variations, which are not described here one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope required by the present invention.
Claims
1. A vehicle airbag cover weakening groove detection device, comprising a base plate (1), a motion module (2), a CCD visual detection component (3), a coaxial laser displacement sensor (4) and a mold (5), characterized in that: The motion module (2) comprises a transverse slide rail (21), a longitudinal slide rail (22) and a slider (23); the slider (23) is slidably mounted on the longitudinal slide rail (22); the longitudinal slide rail (22) is slidably mounted on the transverse slide rail (21); the transverse slide rail (21) is fixedly mounted on the bottom plate (1); the slider (23) and the longitudinal slide rail (22) are respectively driven by motors connected thereto; the CCD visual detection component (3) and the coaxial laser displacement sensor (4) are mounted on the slider (23) connected to the longitudinal slide rail (22) via a connecting structure; the CCD visual detection component (3) is mounted and connected to a camera and is provided with an output end; the coaxial laser displacement sensor (4) is mounted and connected to a laser head and is provided with an output end; the tire (5) comprises a bracket (51) and a tire body (52); a hollow window is opened in the middle of the tire body (52) and is fixed above the bracket (51); the bracket 51 is fixedly mounted on the bottom plate (1).
2. The vehicle airbag cover weakening groove detection device according to claim 1, characterized in that: The CCD visual detection component (3) is connected to the industrial computer circuit.
3. The vehicle airbag cover weakening groove detection device according to claim 1, characterized in that: The motion module (2) is connected to the industrial computer circuit.