Inner step ultrasonic detection test block

Abstract

The utility model relates to an inner step ultrasonic detection test block, which belongs to the technical field of ultrasonic nondestructive testing and comprises a test block body provided with a plurality of through holes along the length direction. The plurality of through holes are arranged on the test block body in a step shape, and the distance between the through hole at the head end and the upper end surface of the test block body is not equal to the distance between the through hole at the tail end and the lower end surface of the test block body. Compared with the prior art, the step test block is formed by hollowing the interior of the test block body, so that different step distributions can be formed when the test block body is positively placed and reversely placed, compared with the existing step test block, the number of steps of the test block is doubled, and as the appearance is not provided with actual steps, the two-side placement is of a stable structure.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic nondestructive testing technology, specifically to an internal stepped ultrasonic testing block. Background Technology

[0002] Ultrasonic testing blocks are artificial reflective specimens with simple geometric shapes designed and manufactured for specific purposes, playing a crucial role in ultrasonic testing. Currently, the stepped test blocks used in ultrasonic testing are mostly stair-shaped blocks. They are manufactured by machining metal cubes according to different step heights to form a staircase-like shape, and the step height and width can be adjusted according to actual needs.

[0003] For example, patent CN202020135660.1 describes a simulated test block for precise quantitative ultrasonic detection of defects in SiCp / Al composite materials. The block includes a body, flat-bottomed holes, and fillers. The body is a stepped structure of equal width, comprising three or more steps, each step having a flat-bottomed hole of the same diameter. Three flat-bottomed holes are arranged side-by-side on the middle step. One of these holes is not filled with material, while the other two are filled with different fillers, namely Al pillars and SiCp / Al composite materials. This type of stepped test block has a flat surface and a stepped surface. When testing from the stepped surface, the test block is relatively stable. However, when testing from the flat surface to the stepped surface, the test block cannot be placed flat and requires an auxiliary support. Furthermore, due to the stepped shape, only half of the metal block is used in the height direction. For example, if the stepped range is 5 steps, increasing it to 10 steps requires lengthening the test block or reducing the size of the stepped surface. Extending the test block will increase its volume, while reducing the step surface will reduce the flaw detection area, thus limiting the usable ultrasonic probe size to a certain range. Utility Model Content

[0004] The purpose of this invention is to overcome at least one of the defects in the existing technology mentioned above and to provide an internally stepped ultrasonic testing block. This invention forms a stepped test block by hollowing out the interior of the test block body, allowing different stepped distributions to be formed whether the test block body is placed upright or upside down. Compared to existing stepped test blocks, the number of steps is doubled. Since there are no actual steps on the surface, the structure is stable whether placed on either side.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An internal stepped ultrasonic testing block includes a test block body, wherein the test block body has multiple through holes along its length.

[0007] Multiple through holes are arranged in a stepped manner on the test block body. The distance between the first through hole and the upper end face of the test block body is different from the distance between the last through hole and the lower end face of the test block body.

[0008] Furthermore, the through hole is a rectangular through hole.

[0009] Furthermore, along the length direction of the test block body, the spacing between two adjacent through holes is 0.

[0010] Furthermore, along the height direction of the test block body, the spacing between any two adjacent through holes is equal.

[0011] Furthermore, the upper and lower surfaces of the through hole are respectively provided with vertical grooves to simulate bottom defects.

[0012] Furthermore, the height of the vertical groove is 0.5–2 mm, and the length is 0.5–2 mm.

[0013] Furthermore, a pair of transverse through holes are provided on the wall surface of the test block body on both sides of the through hole, and the pair of transverse through holes are used to simulate internal defects.

[0014] Furthermore, the diameter of the transverse through hole is 0.5–2 mm.

[0015] Furthermore, the test block body is provided with multiple dimension markings, which indicate the distances between the upper and lower end faces of the through hole and the upper and lower end faces of the test block body, respectively. That is, the dimension markings indicate the distance between the upper end face of the through hole and the upper end face of the test block body, or the distance between the lower end face of the through hole and the lower end face of the test block body.

[0016] Furthermore, the upper and / or lower surfaces of the test block body are provided with anti-slip protrusions.

[0017] Compared with the prior art, this utility model forms a stepped test block by hollowing out the inside of the test block body, so that different stepped distributions can be formed when the test block body is placed upright or upside down. Compared with the existing stepped test blocks, the number of steps of the test block is doubled. Since there are no actual steps on the surface, the structure is stable when placed on both sides. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal stepped ultrasonic testing block structure in the embodiment;

[0019] Figure 2 A schematic diagram of the anti-slip protrusion structure added to the inner stepped ultrasonic testing block in the embodiment;

[0020] Figure 3This is a schematic diagram showing the different thickness ranges of the internal stepped ultrasonic testing block formed by the through holes in the embodiment;

[0021] Figure 4 This is a schematic diagram showing the thickness marking of the inner stepped ultrasonic testing block in the embodiment;

[0022] Figure 5 This is a schematic diagram of the simulated defect structure with a square groove added to the inner groove of the inner stepped ultrasonic testing block in the embodiment;

[0023] Figure 6 This is a schematic diagram of the simulated defect structure with a transverse through hole added to the inner stepped ultrasonic testing block in the embodiment;

[0024] Figure 7 The echo signals received by ultrasound on test blocks of different thicknesses;

[0025] Figure 8 The existing ultrasonic testing method and echo path for stepped test blocks;

[0026] Figure 9 The internal stepped ultrasonic testing block detection method and echo path in the embodiment;

[0027] The labels in the diagram indicate: a101 - through hole; a102 - anti-slip protrusion; a103 - dimensioning; a104 - vertical groove; a105 - horizontal through hole; M - height of the test block body; N - length of the test block body; m - height of the through hole; n - width of the through hole; ah1 - distance between the upper end face of the first through hole and the upper end face of the test block body; ah2 - distance between the lower end face of the first through hole and the lower end face of the test block body; bh1 - distance between the upper end face of the second through hole and the upper end face of the test block body; bh2 - distance between the lower end face of the second through hole and the lower end face of the test block body; ch1 - distance between the upper end face of the third through hole and the upper end face of the test block body; ch2 - distance between the lower end face of the third through hole and the lower end face of the test block body; dh1 - The distance between the upper end face of the fourth through hole and the upper end face of the test block body; dh2 - the distance between the lower end face of the fourth through hole and the lower end face of the test block body; eh1 - the distance between the upper end face of the fifth through hole and the upper end face of the test block body; eh2 - the distance between the lower end face of the fifth through hole and the lower end face of the test block body; fh1 - the distance between the upper end face of the sixth through hole and the upper end face of the test block body; fh2 - the distance between the lower end face of the sixth through hole and the lower end face of the test block body; gh1 - the distance between the upper end face of the seventh through hole and the upper end face of the test block body; gh2 - the distance between the lower end face of the seventh through hole and the lower end face of the test block body; hh1 - the distance between the upper end face of the eighth through hole and the upper end face of the test block body; hh2 - the distance between the lower end face of the eighth through hole and the lower end face of the test block body. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0029] Example

[0030] In actual ultrasonic testing and thickness measurement, the following situations may be encountered: Figure 7 The signal problem shown is that as the ultrasonic waves travel further in the material, the echo signal becomes weaker and weaker. This situation can cause the echo signals formed by defects of the same size at different depths to be inconsistent. Therefore, in actual testing, sound path compensation is performed. In this process, stepped test blocks are used, and defect holes of different depths are also used for calibration.

[0031] Existing stepped test blocks, with their single-sided staircase design, present two problems: ① placing the stepped side downwards causes the surface to tilt, requiring auxiliary devices; ② adding more steps necessitates increasing the block size or reducing the testing surface. Therefore, this embodiment provides an internally stepped ultrasonic testing block to solve these problems. The specific structure is shown below. Figure 1-3 The test block includes a test block body, and the test block body has multiple through holes a101 along the length direction;

[0032] Multiple through holes a101 are arranged in a stepped manner on the test block body. The distance between the first through hole a101 and the upper end face of the test block body is different from the distance between the last through hole a101 and the lower end face of the test block body.

[0033] In this embodiment, the through hole a101 is a rectangular through hole. Along the length of the test block body, the distance between two adjacent through holes a101 is 0. Along the height of the test block body, the distance between any two adjacent through holes a101 is equal.

[0034] In this embodiment, the height M, length N, and width of the test block body are 50mm, 150mm, and 30mm, respectively; the height m of the through hole a101 is 2.5mm, and the length n is 15mm. Optionally, there are a total of 8 through holes a101, wherein the distance between the upper end face of the first through hole and the upper end face of the test block body is denoted as ah1; the distance between the lower end face of the first through hole and the lower end face of the test block body is denoted as ah2; the distance between the upper end face of the second through hole and the upper end face of the test block body is denoted as bh1; the distance between the lower end face of the second through hole and the lower end face of the test block body is denoted as bh2; the distance between the upper end face of the third through hole and the upper end face of the test block body is denoted as ch1; the distance between the lower end face of the third through hole and the lower end face of the test block body is denoted as ch2; the distance between the upper end face of the fourth through hole and the upper end face of the test block body is denoted as dh1; and the distance between the lower end face of the fourth through hole and the lower end face of the test block body is denoted as dh1. The spacing between the upper end face of the fifth through hole and the upper end face of the test block body is denoted as dh2; the spacing between the upper end face of the fifth through hole and the lower end face of the test block body is denoted as eh1; the spacing between the lower end face of the fifth through hole and the lower end face of the test block body is denoted as eh2; the spacing between the upper end face of the sixth through hole and the upper end face of the test block body is denoted as fh1; the spacing between the lower end face of the sixth through hole and the lower end face of the test block body is denoted as fh2; the spacing between the upper end face of the seventh through hole and the upper end face of the test block body is denoted as gh1; the spacing between the lower end face of the seventh through hole and the lower end face of the test block body is denoted as gh2; the spacing between the upper end face of the eighth through hole and the upper end face of the test block body is denoted as hh1; the spacing between the lower end face of the eighth through hole and the lower end face of the test block body is denoted as hh2. See Figure 3-4 The specific values ​​are shown in the table below. It can be seen that compared with the stepped test block, the thickness step range has doubled. The more curve points drawn during calibration, the better the calibration effect.

[0035]

[0036] In this embodiment, the upper and lower end faces of the through hole a101 are respectively provided with vertical grooves a104, see Figure 5 The vertical groove a104 is used to simulate bottom defects. The height of the vertical groove is 0.5-2 mm, preferably 1 mm; the length is 0.5-2 mm, preferably 1 mm.

[0037] In this embodiment, a pair of transverse through holes a105 are provided on the wall surface of the test block body on both sides of the through hole a101, see Figure 6 Internal defects are simulated through the pair of transverse through holes a105.

[0038] In this embodiment, the diameter of the transverse through hole a105 is 0.5 to 2 mm, preferably 1 mm.

[0039] In this embodiment, the test block body is provided with multiple dimension markings 103 by laser to facilitate comparative observation during use. The dimension markings 103 are the distances between the upper and lower end faces of the through hole a101 and the upper and lower end faces of the test block body, respectively.

[0040] In this embodiment, the upper and / or lower surfaces of the test block body are provided with anti-slip protrusions a102. Preferably, the anti-slip protrusions a102 are 3mm in diameter and made of plastic or other flexible materials. They can be glued or pre-drilled on the test block and installed by rotating them through threads.

[0041] Working principle:

[0042] In this embodiment, the test block body is internally hollowed out, thus innovatively constructing a stepped test block. This unique internal hollowing-out design allows the test block body to exhibit distinctly different stepped distribution patterns whether placed upright or upside down. Compared to traditional stepped test blocks, the number of steps in this test block is doubled. Figure 8-9 In terms of appearance, the test block does not have the obvious and abrupt steps of the conventional design. This design brings a great advantage in structural stability, allowing the test block to maintain a stable structural state when placed on both sides. It effectively avoids problems such as instability caused by steps, and provides a more reliable foundation for related experiments and application scenarios.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An internal step ultrasonic test block comprising a test block body, characterized in that, The test block body is provided with a plurality of through holes (a101) along the length direction; The plurality of through holes (a101) are arranged in a stepped manner on the test block body, and the spacing between the front end through hole (a101) and the upper end surface of the test block body is different from the spacing between the tail end through hole (a101) and the lower end surface of the test block body.

2. An internal stepped ultrasonic testing block according to claim 1, characterized in that, The through hole (a101) is a rectangular through hole.

3. An internal stepped ultrasonic testing block according to claim 1, characterized in that, Along the length direction of the test block body, the spacing between two adjacent through holes (a101) is 0.

4. An internal stepped ultrasonic testing block according to claim 1, characterized in that, Along the height direction of the test block body, the spacing between any two adjacent through holes (a101) is equal.

5. An internal stepped ultrasonic testing block according to claim 1, characterized in that, The upper end surface and the lower end surface of the through hole (a101) are respectively provided with a vertical groove (a104) for simulating defects.

6. An internal ladder ultrasound testing block according to claim 5, characterized in that, The height of the vertical groove (a104) is 0.5-2mm, and the length is 0.5-2mm.

7. An internal stepped ultrasonic testing block according to claim 1, wherein, A pair of horizontal through holes (a105) are arranged on the wall surface of the test block body on both sides of the through hole (a101) for simulating defects.

8. An internal stepped ultrasonic testing block according to claim 7, characterized in that The diameter of the horizontal through hole (a105) is 0.5-2mm.

9. An internal stepped ultrasonic testing block according to claim 1, wherein, The test block body is provided with a plurality of size marking indications (103), and the size marking indication (103) is the spacing between the upper and lower end surfaces of the through hole (a101) and the upper and lower end surfaces of the test block body.

10. An internal stepped ultrasonic testing block according to claim 1, wherein, The upper end surface and / or the lower end surface of the test block body is provided with an anti-skid protrusion (a102).

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