Thermal infrared detection test block

Abstract

The utility model provides a thermal infrared detection test block. The thermal infrared detection test block is formed by laying a plurality of plates made of carbon fiber materials, a plurality of circular grooves I, circular grooves II, circular grooves III, circular grooves IV, circular grooves V and circular grooves VI are formed in the thermal infrared detection test block at equal intervals and are used for thermal infrared detection; the thermal infrared detection test block is formed by crosswise laying plates in four directions of 0 degree, 45 degrees, 90 degrees and 135 degrees; the device is small in size and convenient to carry, can be used for effectively and comprehensively verifying the performance and detection sensitivity of thermal infrared equipment, and can be used for adjusting the detection sensitivity, quantitatively evaluating and analyzing defects and evaluating the detection performance of the equipment in thermal infrared detection of a carbon fiber composite material laminated board, so that the product quality is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal infrared detection equipment, and particularly relates to a thermal infrared detection test block. Background Technique

[0002] During the process of processing composite laminates, due to the influence of the surface state of reinforcing fibers, resin viscosity, impregnation of resin and fibers, and control of material forming process parameters, delamination defects are inevitable in their products. In addition, during the assembly process, due to non-designed loads, construction environments, foreign object impacts, etc., new delaminations will occur or the existing delaminations will expand, and these defects and damages will pose great potential safety hazards to the flight safety of aircraft. Before assembling parts, ultrasonic methods are generally used to detect delaminations in laminates. However, after assembly, the structure is complex, and ultrasonic detection will generate many interference waves, making it impossible to effectively perform in-situ detection of composites. Thermal infrared has non-contact, fast, portable, and visual detection, and can be used as an effective means for in-situ detection of composites. Whether the method and equipment of thermal infrared detection are reliable and can detect defects of the specified size designed must be verified by making a thermal infrared detection comparison test block in advance and using this test block to verify the performance of the thermal infrared detection method and equipment before each detection. The sensitivity of thermal infrared detection is greatly related to the thickness of the part and the size of the defect. The greater the thickness, the smaller the sensitivity; the greater the defect, the higher the sensitivity. Therefore, a large number of artificial defects with different defect sizes and depths are needed to comprehensively verify the performance of thermal infrared equipment and detection sensitivity. However, at present, the sizes and depths of prefabricated artificial defects in thermal infrared detection test blocks on the market are few, and the performance of the equipment and detection sensitivity cannot be effectively verified. Content of the Utility Model

[0003] Aiming at the above problems, the purpose of the utility model is to provide a thermal infrared detection test block with high strength, which can effectively verify the performance of the equipment and detection sensitivity.

[0004] The utility model is realized by the following technical solutions:

[0005] A thermal infrared detection test block is formed by stacking a number of plates made of carbon fiber materials; a number of circular grooves 1, circular grooves 2, circular grooves 3, circular grooves 4, circular grooves 5 and circular grooves 6 are equidistantly arranged on the thermal infrared detection test block for thermal infrared detection; the number of the circular grooves 1 is 5, the size is Φ2mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm respectively; the number of the circular grooves 2 is 7, the size is Φ3mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm respectively; the number of the circular grooves 3 is 5, the size is Φ5mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm respectively; the number of the circular grooves 4 is 5, the size is Φ10mm, and the depths are 1.75mm, 2mm, 2.25mm, 2.5mm, 2.75mm respectively; the number of the circular grooves 5 (6) is 5, the size is Φ15mm, and the depths are 3mm, 3.25mm, 3.5mm, 3.75mm, 4mm respectively; the number of the circular grooves 6 is 5, the size is Φ20mm, and the depths are 4.25mm, 4.5mm, 4.75mm, 5mm respectively; the thermal infrared detection test block is hot-pressed and formed by crossing and stacking the plates in four directions of 0°, 45°, 90°, and 135°; the thermal infrared detection test block is 170mm long, 120mm wide, and 8mm thick.

[0006] The beneficial effects of the present utility model:

[0007] The present utility model is small in volume and convenient to carry, and can effectively comprehensively verify the performance of thermal infrared equipment and detection sensitivity. It can be used for the adjustment of detection sensitivity, defect quantitative evaluation analysis and equipment detection performance evaluation in the thermal infrared detection of carbon fiber composite laminates, so as to ensure product quality. Description of the drawings

[0008] The following further describes the present utility model in detail with reference to the drawings.

[0009] Figure 1 It is a structural schematic diagram of the present utility model.

[0010] As shown in the figure: 1 - plate; 2 - circular groove 1; 3 - circular groove 2; 4 - circular groove 3; 5 - circular groove 4; 6 - circular groove 5; 7 - circular groove 6. Specific embodiments

[0011] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0012] It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and clarity, and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present utility model.

[0013] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. It should be noted that the terms "comprising", "including" or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0014] As Figure 1 shown, a thermal infrared test block includes: a plate 1, a circular groove one 2, a circular groove two 3, a circular groove three 4, a circular groove four 5, a circular groove five 6, and a circular groove six 7.

[0015] The material of the plate 1 is carbon fiber. In order to avoid bending and impact damage, the thermal infrared test block is cross-laid in four directions of 0°, 45°, 90°, and 135°, then placed on a tooling for vacuum sealing and bagging, and sent into a autoclave for curing and forming; the thermal infrared test block is 170 mm long, 120 mm wide, and 8 mm thick.

[0016] A number of circular grooves one 2, circular grooves two 3, circular grooves three 4, circular grooves four 5, circular grooves five 6, and circular grooves six 7 are equidistantly arranged on the thermal infrared test block for thermal infrared detection.

[0017] The number of the circular grooves one 2 is 5, the size is Φ2 mm, and the depths are 0.5 mm, 0.75 mm, 1 mm, 1.25 mm, and 1.5 mm respectively.

[0018] The number of the second circular grooves 3 is 7, the size is Φ3mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm, 1.75mm, and 2mm respectively.

[0019] The number of the third circular grooves 4 is 5, the size is Φ5mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, and 1.5mm respectively.

[0020] The number of the fourth circular grooves 5 is 5, the size is Φ10mm, and the depths are 1.75mm, 2mm, 2.25mm, 2.5mm, and 2.75mm respectively.

[0021] The number of the fifth circular grooves 6 is 5, the size is Φ15mm, and the depths are 3mm, 3.25mm, 3.5mm, 3.75mm, and 4mm respectively.

[0022] The number of the sixth circular grooves 7 is 5, the size is Φ20mm, and the depths are 4.25mm, 4.5mm, 4.75mm, and 5mm respectively.

[0023] Working principle:

[0024] S1 Specimen layup:

[0025] Cut the prepreg of the plate 1; lay it crosswise in four directions of 0°, 45°, 90°, and 135° to avoid bending and impact damage;

[0026] S2 Specimen forming:

[0027] Vacuum seal and bag the completed laid-up specimen on the tooling, and send it into the autoclave for curing and forming;

[0028] S3 Specimen processing:

[0029] Milling the periphery of the thermo-infrared detection specimen; by means of numerically controlled milling of holes, mill the first circular groove 2, the second circular groove 3, the third circular groove 4, the fourth circular groove 5, the fifth circular groove 6, and the sixth circular groove 7 on the thermo-infrared detection specimen respectively;

[0030] S4 Specimen identification;

[0031] Detect the thermo-infrared detection specimen. It is required that the thermo-infrared detection specimen is not allowed to have natural defects, all embedded artificial defects can be detected, and the difference between the defect display size and the actual size is within the range of ±25%; then verify the applicability of the thermo-infrared detection method, the comprehensive performance of the equipment, and the detection sensitivity.

[0032] The protection scope of the present utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A thermal infrared test block, characterized in that: The thermal infrared detection test block is formed by stacking a number of plates (1) made of carbon fiber material; a number of circular grooves one (2), circular grooves two (3), circular grooves three (4), circular grooves four (5), circular grooves five (6) and circular grooves six (7) are respectively arranged at equal intervals in a staggered manner on the thermal infrared detection test block for thermal infrared detection.

2. The thermal infrared test block according to claim 1, wherein: The number of the circular grooves one (2) is 5, the size is Φ2mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm respectively.

3. The thermal infrared test block according to claim 1, wherein: The number of the circular grooves two (3) is 7, the size is Φ3mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm respectively.

4. A thermal infrared test block according to claim 1, characterized in that: The number of the circular grooves three (4) is 5, the size is Φ5mm, and the depths are 0.5mm, 0.75mm, 1mm, 1.25mm, 1.5mm respectively.

5. The thermal infrared test block according to claim 1, wherein: The number of the circular grooves four (5) is 5, the size is Φ10mm, and the depths are 1.75mm, 2mm, 2.25mm, 2.5mm, 2.75mm respectively.

6. A thermal infrared test block according to claim 1, characterized in that: The number of the circular grooves five (6) is 5, the size is Φ15mm, and the depths are 3mm, 3.25mm, 3.5mm, 3.75mm, 4mm respectively.

7. A thermal infrared test block according to claim 1, characterized in that: The number of the circular grooves six (7) is 5, the size is Φ20mm, and the depths are 4.25mm, 4.5mm, 4.75mm, 5 mm respectively.

8. The thermo-infrared test block according to claim 1, wherein: The thermal infrared detection test block is hot-pressed and formed by stacking the plates (1) in four directions of 0°, 45°, 90°, and 135°.

9. The thermo-infrared test block according to claim 1, characterized in that: The thermal infrared detection test block is 170mm long, 120mm wide, and 8mm thick.

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