Equipment for detecting surface defects of fiber reinforced composite material

Abstract

The utility model belongs to the technical field of composite material quality detection, and particularly discloses fiber reinforced composite material surface defect detection equipment which comprises a conveying device, a mechanical arm, a rotary worktable, an optical detection module, an acoustic emission detection module and a three-dimensional lifting platform, the conveying device comprises a first conveying device and a second conveying device; the rotary workbench is located between the first conveying device and the second conveying device, the mechanical arm is arranged on one side of the first conveying device, the three-dimensional lifting table is located on one side of the second conveying device, the acoustic emission detection module is arranged on the three-dimensional lifting table, and X-axis movement, Y-axis movement and Z-axis movement are achieved through the three-dimensional lifting table. The utility model provides detection equipment for surface defects of a fiber reinforced composite material, which can be used for detecting the surface defects and internal defects so as to comprehensively detect the surface defects of the fiber reinforced composite material.

Description

Technical Field

[0001] This utility model belongs to the field of quality inspection technology and relates to a detection device for surface defects of fiber reinforced composite materials. Background Technology

[0002] In recent years, with the rapid development of new energy vehicles, their electronic components have gradually become lighter. Lightweighting, especially for automotive chassis and control systems, places high demands on strength, lightness, and safety. Fiber-reinforced composite materials are widely used in the automotive industry due to their low density, high strength, corrosion resistance, designability, strong vibration damping, and excellent flame retardant properties. However, surface defects are easily generated during the production process of fiber-reinforced composite materials, causing a decrease in strength at defective areas and posing significant safety hazards during material use. Therefore, surface defect detection of fiber-reinforced composite materials is of great significance for ensuring product quality.

[0003] Existing inspection technologies mainly include visual inspection, ultrasound, infrared thermography, X-rays, and acoustic emission. These conventional defect detection technologies have certain shortcomings: manual visual inspection has poor accuracy and cannot observe internal defects; ultrasonic inspection has difficulty locating defects, and when defects are located deep within the body, the ultrasonic echo signal is weak and easily affected by environmental noise; infrared thermography is still in its early stages of non-destructive testing, suffering from low imaging resolution; and X-rays require sophisticated equipment design and are relatively expensive, making them unsuitable for routine production inspections.

[0004] Patent CN210604420U discloses an online inspection device for composite materials. It uses visual inspection and ultrasonic waves to detect defects on the surface and inside of composite materials. The device is suitable for simple roll-type composite materials, but not for fiber-reinforced composite shells with complex structures.

[0005] Patent CN215574838U discloses an ultrasonic and eddy current testing device for carbon fiber laminate composite materials. It uses eddy current and ultrasound to detect the delamination and thermal loss properties of carbon fiber reinforced composite materials of laminate structure type, and therefore only involves the detection of internal defects. Summary of the Invention

[0006] In view of this, the present invention provides a detection device for surface defects of fiber-reinforced composite materials, which can detect both surface and internal defects, thereby achieving comprehensive detection of surface defects in fiber-reinforced composite materials.

[0007] To address the aforementioned problems, embodiments of this utility model provide a detection device for surface defects in fiber-reinforced composite materials, characterized in that:

[0008] Includes a conveying device, a robotic arm, a rotary table, an optical inspection module, an acoustic emission inspection module, and a three-dimensional lifting platform;

[0009] The conveying device includes a first conveying device and a second conveying device; a rotary table is located between the first conveying device and the second conveying device; a robotic arm is set on one side of the first conveying device; a three-dimensional lifting platform is located on one side of the second conveying device; and an acoustic emission detection module is set on the three-dimensional lifting platform, which enables movement along the X, Y, and Z axes.

[0010] The first conveying device is used to transport the fiber-reinforced composite material to be tested. The robotic arm moves the fiber-reinforced composite material to be tested onto the rotary table. The optical detection module is used to detect surface defects of the fiber-reinforced composite material. The robotic arm moves the fiber-reinforced composite material to be tested onto the second conveying device. The acoustic emission detection module realizes the detection of internal defects of the fiber-reinforced composite material.

[0011] Furthermore, the rotating worktable can rotate 360°; there are two optical detection modules, which are respectively set on both sides of the rotating worktable.

[0012] Furthermore, the conveying device includes a conveyor belt and a transmission assembly, wherein the transmission assembly has a drive wheel mounted on a transmission rod, the drive wheel is controlled to rotate by a drive mechanism, and the conveyor belt is connected to a driven wheel.

[0013] Furthermore, the robotic arm is a six-axis robotic arm, which can achieve six degrees of freedom of movement at the end effector by driving the rotation of six joint axes through six servo motors.

[0014] Furthermore, the rotary worktable includes a worktable and a rotary cylinder. The surface of the worktable is provided with an anti-slip pad, which has a certain friction to prevent the fiber-reinforced composite material from sliding during rotation. It works in conjunction with the optical detection module for scanning. The rotary cylinder can rotate up to 360 degrees. It uses a pneumatic drive to drive the worktable to rotate, which can complete the rotation action in a short time and achieve high-precision control.

[0015] Furthermore, the optical inspection module includes a smart camera and a supplementary light source. The smart camera has high linearity, high light intensity uniformity, and high stability, which can ensure accurate alignment and measurement of the fiber-reinforced composite material. The supplementary light source includes a ring light source, a strip light source, and a backlight source, which ensures sufficient illumination during the inspection process to further highlight the surface details and defects of the fiber-reinforced composite material to be inspected.

[0016] Furthermore, the acoustic emission detection module includes a sensor, an amplifier, and a signal processor, wherein the sensor has high sensitivity and wide bandwidth response, with a frequency range of 10kHz to 10MHz.

[0017] Furthermore, the three-dimensional lifting platform includes a three-axis guide rail and a servo motor control system, with a minimum resolution of 0.002mm, a maximum movement speed of 1000mm / s, and a repeatability of ±0.025mm.

[0018] Compared with existing technologies, the fiber-reinforced composite material surface defect detection device of this invention has at least the following beneficial effects:

[0019] This invention uses an optical detection module to scan the surface of fiber-reinforced composite materials, establish a visualized three-dimensional visual model, locate surface defects, and then place it in the acoustic emission detection area using a robotic arm. The acoustic emission detection module is then used to detect internal defects, analyze and collect internal defect information, thereby achieving comprehensive detection of surface defects in fiber-reinforced composite materials. The detection efficiency is high, and the combined use of optical and acoustic emission detection methods enables multi-dimensional defect detection, both internal and external. The device has a high degree of automation and can operate continuously.

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional view of the main structure of a fiber-reinforced composite material surface defect detection device according to the present invention.

[0023] In the figure: 1. First conveying device, 2. Robotic arm, 3. Rotary worktable, 4. Optical detection module, 5. Acoustic emission detection module, 6. Three-dimensional lifting platform, 7. Second conveying device, 8. Fiber-reinforced composite material to be tested. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] See Figure 1 This invention proposes a detection device for surface defects in fiber-reinforced composite materials, comprising a conveying device, a robotic arm 2, a rotary table 3, an optical detection module 4, an acoustic emission detection module 5, and a three-dimensional lifting platform 6. The conveying device includes a first conveying device 1 and a second conveying device 7; the rotary table 3 is located between the first conveying device 1 and the second conveying device 7; the robotic arm 2 is positioned on one side of the first conveying device 1; the optical detection module 4 is positioned around the rotary table 3; the three-dimensional lifting platform 6 is located on one side of the second conveying device 7; and the acoustic emission detection module 5 is mounted on the three-dimensional lifting platform 6. Movement along the X, Y, and Z axes is achieved through the three-dimensional lifting platform 6.

[0026] Specifically, both the first conveying device 1 and the second conveying device 7 include a conveyor belt and a transmission assembly. The transmission assembly includes a drive wheel, which is mounted on a transmission shaft. The drive wheel is controlled to rotate by a drive mechanism. After the drive wheel rotates, it drives the driven wheel to rotate through the conveyor belt.

[0027] Specifically, the robotic arm 2 is a six-axis robotic arm that can drive the rotation of six joint axes through six servo motors to achieve six degrees of freedom of movement at the end.

[0028] Specifically, the rotary worktable 3 includes a worktable and a rotary cylinder. The surface of the worktable is provided with an anti-slip pad, which has a certain friction to prevent the fiber-reinforced composite material from sliding during rotation. It works in conjunction with the optical detection module for scanning. The rotary cylinder can rotate up to 360 degrees. It uses a pneumatic drive to drive the worktable to rotate, which can complete the rotation action in a short time and achieve high-precision control.

[0029] The optical inspection module 4 uses the OPT-SC series camera and SciVision vision development kit manufactured by Guangdong Optoelectronics Technology Co., Ltd. It includes a supplementary light source and optical components. The intelligent optical components mainly consist of a laser sensor and an optical lens, achieving high precision by using a cylindrical objective lens to diffuse the laser light into a line laser, which is then projected onto the target surface to form diffuse reflection. The reflected light is then imaged on a CMOS sensor, and displacement and shape are measured by detecting changes in position and shape. The supplementary light source includes a ring light source, a strip light source, and a backlight, ensuring sufficient illumination during the inspection process to further highlight the surface details and defects of the fiber-reinforced composite material being inspected.

[0030] The acoustic emission detection module 5 can use PCI-2 / PCI-E equipment and acoustic emission software AE-APP produced by Beijing Wusheng Technology Co., Ltd. It includes a sensor, an amplifier and a signal processor. The sensor has high sensitivity and wide bandwidth response, with a frequency range of 10kHz to 10MHz.

[0031] The three-dimensional lifting platform 6 includes a three-axis guide rail and a servo motor control system, with a minimum resolution of 0.002mm, a maximum movement speed of 1000mm / s, and a repeatability of ±0.025mm.

[0032] The working process of the detection device for surface defects of fiber-reinforced composite materials proposed in this utility model is as follows:

[0033] See Figure 1 The fiber-reinforced composite material 8 to be inspected is first transported by the first conveying device 1. A robotic arm 2 is placed on one side of the first conveying device 1, and the robotic arm 2 realizes the loading and unloading transfer. The robotic arm 2 moves the fiber-reinforced composite material 8 to be inspected from the first conveying device 1 to the rotating worktable 3, which can rotate 360°. Two optical inspection modules 4 are placed diagonally above the rotating worktable 3 to detect surface defects of the fiber-reinforced composite material. The optical inspection modules 4 include a smart camera and a supplementary light source. The smart camera is used to scan the surface of the fiber-reinforced composite material, collect surface size data, and then build a three-dimensional visual model in the system. The supplementary light source is used to supplement the light and avoid the generation of surface shadows during the inspection process. When the inner surface of the fiber-reinforced composite material needs to be inspected, the robotic arm 2 can be used to assist in the inspection. The material is vertically flipped and then scanned and inspected using an optical detection module. After surface inspection, the robotic arm 2 moves the fiber-reinforced composite material to the second conveying device 7. The acoustic emission detection module 5, consisting of a sensor, amplifier, and signal processor, sends elastic waves to the fiber-reinforced composite material. After the signal propagates through the material, plastic deformation occurs, causing stress changes and generating stress waves. These stress waves are received and amplified by the detection module and transmitted to the signal processor to obtain the detection results. This process enables the detection of internal defects in the fiber-reinforced composite material. The acoustic emission detection module is fixed on a three-dimensional lifting platform, which allows for movement along the X, Y, and Z axes, facilitating detection at different locations on the fiber-reinforced composite material. Finally, the fiber-reinforced composite material enters the next process via the second conveying device 7.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A device for detecting surface defects in fiber-reinforced composite materials, characterized in that: It includes a conveying device, a robotic arm (2), a rotary table (3), an optical detection module (4), an acoustic emission detection module (5), and a three-dimensional lifting platform (6); The conveying device includes a first conveying device (1) and a second conveying device (7); a rotary table (3) is located between the first conveying device (1) and the second conveying device (7); a robotic arm (2) is set on one side of the first conveying device (1); an optical detection module (4) is set around the rotary table (3); a three-dimensional lifting platform (6) is located on one side of the second conveying device (7); and an acoustic emission detection module (5) is set on the three-dimensional lifting platform (6). The movement of the X, Y and Z axes is realized through the three-dimensional lifting platform (6).

2. The detection device for surface defects of fiber-reinforced composite materials according to claim 1, characterized in that: The rotating worktable (3) can rotate 360°; there are two optical detection modules (4), which are respectively set on both sides of the rotating worktable (3).

3. The equipment for detecting surface defects in fiber-reinforced composite materials according to claim 2, characterized in that: The conveying device includes a conveyor belt and a transmission assembly, wherein the transmission assembly includes a drive wheel, which is mounted on a transmission shaft. After the drive wheel rotates, it drives the driven wheel to rotate through the conveyor belt.

4. The detection device for surface defects of fiber-reinforced composite materials according to claim 3, characterized in that: The robotic arm (2) is a six-axis robotic arm, which can drive the rotation of six joint axes through six servo motors to achieve six degrees of freedom of movement at the end.

5. The equipment for detecting surface defects in fiber-reinforced composite materials according to claim 4, characterized in that: The rotary worktable (3) includes a worktable and a rotary cylinder. The rotary cylinder is pneumatically driven to drive the worktable to complete the rotation action.

6. The detection device for surface defects of fiber-reinforced composite materials according to claim 5, characterized in that: The surface of the rotary worktable (3) is provided with an anti-slip pad.

7. The detection device for surface defects of fiber-reinforced composite materials according to claim 6, characterized in that: The optical detection module (4) includes a supplementary light source, which is a ring light source, a strip light source, or a backlight source.

8. The detection device for surface defects of fiber-reinforced composite materials according to claim 7, characterized in that: The acoustic emission detection module (5) includes a sensor, an amplifier, and a signal processor.

9. The equipment for detecting surface defects in fiber-reinforced composite materials according to claim 8, characterized in that: The three-dimensional lifting platform (6) includes a three-axis guide rail and a servo motor control system, with a minimum resolution of 0.002mm, a maximum movement speed of 1000mm / s, and a repeatability of ±0.025mm.

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