Inner step ultrasonic detection test block

Abstract

The invention relates to an inner step ultrasonic detection test block, which belongs to the technical field of ultrasonic non-destructive testing and comprises a test block body, and a plurality of through holes are formed in the test block body 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 stepped test block is formed by hollowing the interior of the test block body, so that different stepped distributions can be formed when the test block body is positively placed and reversely placed, compared with the existing stepped test block, the number of steps of the test block is doubled, and due to the fact that actual steps are not arranged on the appearance, the two surfaces of the test block are of a stable structure when the test block is placed.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic nondestructive testing, and in particular to an internal step ultrasonic testing block. Background Art

[0002] Ultrasonic test blocks are samples with simple geometric shapes and artificial reflectors designed for certain purposes, and they play an important role in ultrasonic testing. At present, most of the step test blocks used in ultrasonic testing are stair-type step test blocks, which are made by machining metal cubes according to different step heights to form a staircase-like style, and the step height and width can be adjusted according to actual needs.

[0003] For example, the patent CN202020135660.1 discloses a simulation test block for ultrasonic precise quantitative detection of defects in SiCp / Al composite materials, including a body, a flat-bottom hole and a filler, wherein: the body is in the shape of equal-width steps, including more than 3 steps, and each step is provided with a flat-bottom hole with the same aperture, and three flat-bottom holes are arranged in parallel on the middle step, one of which is not filled with material, and the other two are filled with different fillers, respectively, and the fillers are Al columns and SiCp / Al composite materials. This type of stepped step test block has a plane and a step surface. When the test block is tested from the step surface, the placement of the test block is relatively stable, but if it is tested from the plane to the step surface, the test block cannot be placed flat and needs to be assisted by an auxiliary bracket. Moreover, due to the form of the steps, only half of the metal block is used in the height direction. For example, if the step range is 5 steps, if it is to be increased to 10 steps, the test block needs to be extended or the step surface needs to be reduced. Extending the test block will increase the volume of the test block, while reducing the step surface will reduce the flaw detection surface, resulting in the usable ultrasonic probe size being limited to a certain range. Summary of the invention

[0004] The purpose of the present invention is to provide an internal step ultrasonic testing block in order to overcome at least one of the defects of the above-mentioned prior art. The present invention forms a step test block by hollowing out the inside of the test block body, so that the test block body can form different step distributions when placed upright or inverted. Compared with the existing step test block, the number of test block steps is doubled. Since there is no actual step in appearance, it is a stable structure when placed on both sides.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An internal step ultrasonic testing block comprises a test block body, wherein the test block body is provided with a plurality of through holes along the length direction;

[0007] The plurality of through holes are arranged in a stepped manner on the test block body, and the distance between the through holes at the head end and the upper end surface of the test block body and the distance between the through holes at the tail end and the lower end surface of the test block body are not equal.

[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, vertical grooves are respectively provided on the upper end surface and the lower end surface of the through hole, and the bottom defects are simulated by the vertical grooves.

[0012] Furthermore, the vertical groove has a height of 0.5 to 2 mm and a length of 0.5 to 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 internal defects are simulated through the pair of transverse through holes.

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

[0015] Furthermore, the test block body is provided with a plurality of dimension markings, and the dimension markings are respectively 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. In other words, the dimension markings are the distances between the upper end face of the through hole and the upper end face of the test block body, or the distances between the lower end face of the through hole and the lower end face of the test block body.

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

[0017] Compared with the prior art, the present invention forms a stepped test block by hollowing out the interior of the test block body, so that the test block body can form different step distributions whether placed upright or inverted. Compared with the existing stepped test blocks, the number of test block steps is doubled. Since there are no actual steps in appearance, the structure is stable when placed on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 A schematic diagram of a structure for adding anti-slip protrusions to the inner-step ultrasonic testing block in the embodiment;

[0020] Figure 3Schematic diagram of different thickness ranges formed by through holes of the inner step ultrasonic testing block in the embodiment;

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

[0022] Figure 5 This is a schematic diagram of a structure for simulating defects by adding a square groove to the inner groove of the inner step ultrasonic inspection test block in the embodiment;

[0023] Figure 6 A schematic diagram of a structure in which a transverse through hole is added to the internal step ultrasonic inspection test block in the embodiment to simulate a defect;

[0024] Figure 7 It is the echo signal received by ultrasonic wave on test blocks of different thicknesses;

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

[0026] Fig. 9 The detection method and echo path of the inner step ultrasonic test block in the embodiment;

[0027] As shown in the figure, the numbers are as follows: a101-through hole; a102-anti-slip protrusion; a103-dimension marking diagram; a104-vertical groove; a105-transverse 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-spacing between the upper end face of the first through hole and the upper end face of the test block body; ah2-spacing between the lower end face of the first through hole and the lower end face of the test block body; bh1-spacing between the upper end face of the second through hole and the upper end face of the test block body; bh2-spacing between the lower end face of the second through hole and the lower end face of the test block body; ch1-spacing between the upper end face of the third through hole and the upper end face of the test block body; ch2-spacing 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 DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0029] Example

[0030] In actual ultrasonic testing and thickness measurement, we may encounter Figure 7 The signal problem shown is that as the ultrasonic wave propagates farther and farther in the material, the echo signal becomes weaker and weaker. This situation will cause the echo signals formed by defects of the same size at different depths to be inconsistent. Therefore, sound path compensation will be performed in actual detection. In this process, a step test block will be used, and defect holes of different depths will also be used for calibration.

[0031] The existing step test block has two problems in the form of a staircase with a single step: ① Placing the step face downward will cause the plane to tilt, requiring auxiliary devices; ② Adding more steps requires increasing the size of the test block or reducing the detection surface. Therefore, this embodiment provides an internal step ultrasonic test block to solve the above problems. The specific structure is shown in Figure 1-3 The test block includes a test block body, and the test block body is provided with a plurality of through holes a101 along the length direction;

[0032] The plurality of through holes a101 are arranged in a stepped manner on the test block body, and the distance between the through holes a101 at the head end and the upper end surface of the test block body and the distance between the through holes a101 at the tail end and the lower end surface of the test block body are not equal.

[0033] In this embodiment, the through hole a101 is a rectangular through hole. Along the length direction of the test block body, the spacing between two adjacent through holes a101 is 0. Along the height direction of the test block body, the spacing 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 8 through holes a101 in total, wherein the distance between the upper end face of the first through hole and the upper end face of the test block body is recorded 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 recorded 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 recorded 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 recorded 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 recorded 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 recorded 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 recorded as dh1; the distance between the lower end face of the fourth through hole and the lower end face of the test block body is recorded as The spacing between the upper end face of the fifth through hole and the upper end face of the test block body is recorded as dh2; the spacing between the upper end face of the fifth through hole and the upper end face of the test block body is recorded 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 recorded 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 recorded 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 recorded 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 recorded 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 recorded 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 recorded 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 recorded 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 surfaces of the through hole a101 are respectively provided with vertical grooves a104. Figure 5 The bottom defect is simulated by the vertical groove a104. 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. 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 0.5-2 mm, preferably 1 mm.

[0039] In this embodiment, the test block body is provided with a plurality of dimension markings 103 by laser, which is convenient for 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.

[0040] In this embodiment, the upper end face and / or lower end face of the test block body is provided with an anti-slip protrusion a102. Preferably, the anti-slip protrusion a102 is 3 mm in diameter and is made of plastic or other flexible materials. It can be bonded or drilled in advance on the test block and installed by rotation through threads.

[0041] Working principle:

[0042] In this embodiment, the test block body is hollowed out internally, thereby innovatively constructing a stepped test block. This special form of internal hollowing allows the test block body to present a completely different stepped distribution state whether it is placed upright or inverted. Compared with the traditional stepped test block, the number of steps in this test block has doubled. Figure 8-9 In terms of appearance, the test block does not have the obvious abrupt steps in the conventional sense. This design brings great advantages in structural stability, allowing the test block to maintain a stable structural state when placed on both sides, effectively avoiding problems such as unstable placement caused by steps, and providing a more reliable foundation for related experiments and application scenarios.

[0043] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. An internal step ultrasonic testing 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 through holes (a101) at the head end and the upper end surface of the test block body and the spacing between the through holes (a101) at the tail end and the lower end surface of the test block body are not equal.

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

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

4. The internal step 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. The internal step 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 vertical grooves (a104), and the defects are simulated by the vertical grooves (a104).

6. The internal step ultrasonic testing block according to claim 5, characterized in that: The vertical groove (a104) has a height of 0.5 to 2 mm and a length of 0.5 to 2 mm.

7. The internal step ultrasonic testing block according to claim 1, characterized in that: 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), and defects are simulated through the pair of transverse through holes (a105).

8. The internal step ultrasonic testing block according to claim 7, characterized in that: The diameter of the transverse through hole (a105) is 0.5 to 2 mm.

9. The internal step ultrasonic testing block according to claim 1, characterized in that: The test block body is provided with a plurality of dimension markings (103), wherein the dimension markings (103) are the distances between the upper and lower end surfaces of the through hole (a101) and the upper and lower end surfaces of the test block body, respectively.

10. The internal step ultrasonic testing block according to claim 1, characterized in that: The upper end surface and / or the lower end surface of the test block body are provided with anti-slip protrusions (a102).

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