Calibration test block for ultrasonic phased array detection of epoxy casting product

Abstract

The utility model discloses a calibration test block for ultrasonic phased array detection of an epoxy cast product, which belongs to the field of nondestructive testing, and is integrally cast and molded by adopting a thermosetting resin material, so that the test block and a workpiece to be detected have the same parameters such as sound velocity, acoustic impedance and the like. In order to avoid cracks in subsequent drilling, pipelines arranged at different depth positions in a test block made of a thermosetting resin material are used as prefabricated defects, so that the sensitivity, the detection limit and the resolution of a measurement curve are verified. The calibration test block group is cast by using the thermosetting resin material, the pipeline is used as a prefabricated defect in the calibration test block, and the position of the calibration test block in the calibration test block is determined, so that the test block provided by the utility model is made of the thermosetting resin material, and air holes and cracks are not generated in the processing process; the current situation that no calibration test block exists in the ultrasonic phased array detection of the epoxy casting product is solved, the calibration difficulty can be reduced, and misjudgment is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of nondestructive testing and relates to a calibration test block for ultrasonic phased array testing of epoxy casting products. Background Art

[0002] The existing test blocks are machined and have low insulation and mechanical properties. Therefore, thermosetting resin is introduced. This material has good insulation and mechanical properties and is widely used in the high-voltage switch industry. Its performance stability is crucial to the stability of the performance of high-voltage electrical products.

[0003] The production process of thermosetting resins is highly specialized. Compared with metal materials, the acoustic impedance of thermosetting resin cast products is larger, the energy attenuation is large during detection, the sound beam propagation distance is short, the sensitivity is low, and the detection line is high. Traditional metal test blocks are not fully applicable. However, the thermosetting resin also has high performance requirements. Therefore, defects such as pores and cracks will appear in the processing process, which increases the difficulty of processing and leads to low accuracy of verification results and misjudgment. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art and provides a calibration test block for ultrasonic phased array detection of epoxy casting products.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a calibration test block for ultrasonic phased array detection of epoxy casting products, comprising a test block, wherein the test block is cast by thermosetting resin;

[0007] A plurality of transverse through holes are opened on the test block, a pipeline is arranged in each transverse through hole, and the plurality of transverse through holes are arranged at equal intervals and in the same direction.

[0008] Preferably, there are several test blocks, and the positions of the transverse through holes on each test block are consistent.

[0009] Preferably, the angle between the transverse through holes arranged in the same direction and the horizontal plane is 76°.

[0010] Preferably, the pipeline is made of metal material.

[0011] Preferably, the diameter of the pipe ranges from 0.7 mm to 2.5 mm.

[0012] Preferably, the thermosetting resin is epoxy resin.

[0013] Preferably, the test block has a length ranging from 350 mm to 400 mm, a width ranging from 35 mm to 50 mm, and a height ranging from 100 mm to 160 mm.

[0014] Preferably, the distance between the transverse through hole and the two end surfaces of the test block is not less than 35 mm, and the distance between the transverse through hole and the upper surface of the test block is 10 mm to 20 mm.

[0015] Preferably, the diameters of the several pipes are the same.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model proposes a calibration test block for ultrasonic phased array detection of epoxy cast products. The test block is integrally cast and molded using a thermosetting resin material so that the test block and the workpiece to be tested have the same sound velocity, acoustic impedance and other parameters. In order to avoid cracks in subsequent drilling, the utility model inserts pipes at different depths in the test block made of thermosetting resin material as prefabricated defects to verify the sensitivity, detection limit and resolution of the measurement curve. The calibration test block group is cast using thermosetting resin material, and the pipe is used as a prefabricated defect inside the calibration test block, and its position inside the calibration test block is determined. Therefore, the test block proposed by the utility model uses thermosetting resin material and will not have pores and cracks during the processing process, so as to solve the current situation that there is no calibration test block for ultrasonic phased array detection of epoxy cast products, and can reduce the difficulty of calibration and reduce misjudgment.

[0018] Furthermore, the center positions of the corresponding prefabricated defects of each test block should be consistent to avoid errors when making curves and calibrating.

[0019] Furthermore, the distance between the transverse through holes on both sides and the two end surfaces of the test block is no less than 35 mm, and the distance between the top transverse through hole and the upper surface of the test block is 10-20 mm, which meets the requirements for making phased array TCG curves to verify the detection limit and sensitivity of phased array detection of epoxy casting specimens. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a result diagram of the calibration test block used for ultrasonic phased array testing of epoxy cast products of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The utility model is further described in detail below with reference to the accompanying drawings:

[0029] The utility model provides a calibration test block for ultrasonic phased array detection of epoxy casting products, such as Figure 1 As shown, it includes a test block 1, which is cast and molded with a thermosetting resin; a plurality of transverse through holes are opened on the test block 1, and a pipe is arranged in each transverse through hole, and the plurality of transverse through holes are arranged at equal intervals and arranged in the same direction, and the angle between the transverse through holes arranged in the same direction and the horizontal plane is 76°. The test block 1 is integrally cast and molded with a thermosetting resin material, so that the test block 1 and the workpiece to be measured have the same parameters such as sound velocity and acoustic impedance. In order to avoid cracks in subsequent drilling, the utility model uses pipes inserted at different depths in the test block made of thermosetting resin material as prefabricated defects to verify the sensitivity, detection limit and resolution of the measurement curve. The calibration test block 1 is cast using thermosetting resin material, and a pipe is used as a prefabricated defect inside the calibration test block 1, and its position inside the calibration test block is determined. Therefore, the test block 1 proposed by the utility model uses thermosetting resin material and will not have pores and cracks during the processing process, so as to solve the current situation that there is no calibration test block for ultrasonic phased array detection of epoxy cast products, which can reduce the difficulty of calibration and reduce misjudgment.

[0030] There are several test blocks 1, the symmetry planes of the test blocks 1 are parallel, and the positions of the transverse through holes on each test block 1 are consistent, so as to avoid errors in making curves and calibration.

[0031] The pipe is made of metal material to avoid the inevitable cracks and other defects of brittle materials in the drilling, which affect the accuracy of TCG curve production and calibration. The diameters of several pipes are the same, ranging from 0.7mm to 2.5mm. Five specifications of metal pipes with diameters of 0.7mm to 2.5mm are used as prefabricated defects to verify the detection sensitivity, detection limit, and calibration basis of the curve. Using the test block group with 0.7mm to 2.5mm prefabricated defects, parameters such as the speed of sound in test block 1 can be tested. For test blocks of different thicknesses, test curves with different sensitivities and detection limits can be produced, and the measurement parameters of the curve can be tested.

[0032] The thermosetting resin is epoxy resin, which is used to measure parameters such as the sound velocity of the resin material, produce ultrasonic phased array TCG curves of epoxy casting products, verify the detection sensitivity, detection limit and scanning resolution of different thicknesses, and solve the problems of difficulty and low efficiency of non-destructive testing of epoxy casting products due to large attenuation.

[0033] The test block 1 is in the shape of a cuboid, with a length ranging from 350 mm to 400 mm, a width ranging from 35 mm to 50 mm, and a height ranging from 100 mm to 160 mm, and its thickness meets the requirements of detection limit, detection accuracy and sensitivity.

[0034] The distance between the transverse through hole and the two end faces of the test block 1 is not less than 35mm, and the distance between the transverse through hole and the upper surface of the test block 1 is 10mm to 20mm, which meets the requirements for the production of the phased array TCG curve to verify the detection limit and sensitivity of the phased array for epoxy casting test pieces. The highest and lowest prefabrication defects should meet the requirements for avoiding monitoring blind spots.

[0035] The utility model proposes a calibration test block for ultrasonic phased array detection of epoxy cast products. The detection method is phased array ultrasonic detection. The test block group is block-shaped and is a cast product of epoxy cast material. Each test block is cast with 1 to 8 pipes made of metal material as prefabricated defects. The pipes made of metal material are arranged linearly, and the outer diameters of the metal pipes are five specifications of 0.7mm, 1.0mm, 1.5mm, 2.0mm, and 2.5mm. The diameter of the metal pipes on each test block is the same. The cross-hole is corrected to make the cross-hole flush with the surface of the test block. In order to solve the current situation that there is no calibration test block for ultrasonic phased array detection of epoxy cast products, the detection technical parameters are the same as the material of the workpiece being detected, and the acoustic impedance and other properties are the same. It has the characteristics of low calibration difficulty, intuitive detection results, high similarity and can reduce misjudgment. The detection accuracy and display accuracy of the TCG curve surface scan are detected through the longitudinal and horizontal distances of the metal material pipe. The surface finish should be guaranteed when machining the test block 1.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A calibration test block for ultrasonic phased array detection of epoxy cast products, characterized in that: The test block (1) is formed by casting of a thermosetting resin; A plurality of transverse through holes are provided on the test block (1), a pipeline is provided in each transverse through hole, and the plurality of transverse through holes are arranged at equal intervals and in the same direction.

2. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: There are a plurality of test blocks (1), and the positions of the transverse through holes on each test block (1) are consistent.

3. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: The included angle between the transverse through holes arranged in the same direction and the horizontal plane is 76°.

4. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: The pipeline is made of metal material.

5. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: The diameter of the pipe ranges from 0.7 mm to 2.5 mm.

6. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: The thermosetting resin is epoxy resin.

7. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: The test block (1) has a length ranging from 350 mm to 400 mm, a width ranging from 35 mm to 50 mm, and a height ranging from 100 mm to 160 mm.

8. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: The distance between the transverse through hole and the two end surfaces of the test block (1) is not less than 35 mm, and the distance between the transverse through hole and the upper surface of the test block (1) is 10 mm to 20 mm.

9. The calibration test block for ultrasonic phased array detection of epoxy cast products according to claim 1, characterized in that: Several pipes have the same diameter.

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