Industrial CT detection comparison test block, manufacturing method and detection method

Abstract

The present invention belongs to the technical field of nondestructive testing, and discloses an industrial CT detection comparison test block, a manufacturing method and a detection method. The comparison test block includes a first additive manufacturing block, a second additive manufacturing block and a plurality of additive manufacturing micro blocks. A plurality of mutually spaced first receiving grooves are provided on one side of the first additive manufacturing block, and a plurality of mutually spaced first protrusions are provided on one side of the second additive manufacturing block. The depth of the first receiving groove is greater than the height of the first protrusion. The bottom end of each first receiving groove can be sealed and filled with an additive manufacturing micro block, and the top end of each first receiving groove can be sealed and filled with a first protrusion, and the first protrusion and the additive manufacturing micro block in the same first receiving groove are mutually attached, and an artificial defect of the order of μm is provided on the additive manufacturing micro block in at least one first receiving groove. The industrial CT detection comparison test block proposed by the present invention improves the verification capability of the detection sensitivity of the industrial CT detection method.

Description

Technical Field

[0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to an industrial CT testing comparison test block, a manufacturing method and a testing method. Background Art

[0002] Industrial CT detection technology uses X-rays to detect defects inside workpieces, and can obtain information on internal density uniformity, pores, cracks, and other defects. Industrial CT detection has the advantages of high precision and three-dimensional visualization imaging, and is often used for non-destructive detection of micro defects in metal parts, especially for metal additive manufacturing parts.

[0003] The structure of metal additive manufacturing materials usually contains microscopic defects ranging from tens of microns to hundreds of microns, such as holes, pores, cracks, etc. This scale of defects will affect the mechanical properties of the material. Therefore, most industrial CT detection methods are used for non-destructive testing of metal additive manufacturing parts. The non-destructive testing sensitivity of the industrial CT detection method is verified by its detection of comparison test blocks.

[0004] At present, the defects inside the existing metal additive manufacturing comparison test blocks are usually directly embedded through printing, and the position and number of defects are fixed. Therefore, the comparison test blocks have a small scope of application, and the accuracy of the defects inside the comparison test blocks is low, which makes it impossible to accurately verify the detection sensitivity of the industrial CT detection method, resulting in difficulty in evaluating the accuracy and stability of the industrial CT detection results of the corresponding parts. Summary of the invention

[0005] The purpose of the present invention is to provide an industrial CT detection comparison test block, a manufacturing method and a detection method, which have a large scope of application and improve the detection sensitivity verification capability of the industrial CT detection method.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An industrial CT detection comparison test block, comprising:

[0008] A first additive manufacturing block, wherein a plurality of first accommodating grooves spaced apart from each other are formed on one side surface of the first additive manufacturing block;

[0009] a second additive manufacturing block, wherein a plurality of first protrusions spaced apart from each other are arranged on one side surface of the second additive manufacturing block, and a depth of the first receiving groove is greater than a height of the first protrusion;

[0010] A plurality of additively manufactured micro-blocks are provided, wherein the bottom end of each of the first receiving grooves can be sealed and filled with one of the additively manufactured micro-blocks, the top end of each of the first receiving grooves can be sealed and filled with one of the first protrusions, and the first protrusions and the additively manufactured micro-blocks in the same first receiving groove are in contact with each other, and an artificial defect of the order of μm is provided on the additively manufactured micro-block in at least one of the first receiving grooves.

[0011] Preferably, a third additive manufacturing block is further included, and a plurality of second protrusions spaced apart from each other are arranged on one side surface of the third additive manufacturing block, and a plurality of second receiving grooves spaced apart from each other are opened on the side of the second additive manufacturing block which is different from the first protrusions, and each of the second receiving grooves can simultaneously seal and fill a second protrusion and an additive manufacturing micro-block, and the artificial defect is arranged on the additive manufacturing micro-block in at least one of the second receiving grooves.

[0012] Preferably, the first protrusion and the second receiving groove are respectively arranged on two opposite sides of the second additive manufacturing block.

[0013] Preferably, the additively manufactured micro-block is a cubic block or a cylinder.

[0014] Preferably, a plurality of the first accommodating grooves are evenly arranged along a straight line.

[0015] Preferably, the artificial defect comprises a blind hole, and the diameter and depth of the blind hole are the same.

[0016] A method for manufacturing an industrial CT detection comparison test block is used to manufacture the above-mentioned industrial CT detection comparison test block, the method comprising:

[0017] Printing a first additive manufacturing block, a second additive manufacturing block, and a plurality of additive manufacturing micro blocks using an additive printing method;

[0018] Artificial defects of μm magnitude are machined out on a partial number of additively manufactured micro-blocks using precision machining methods.

[0019] An industrial CT detection comparison test block detection method adopts the above industrial CT detection comparison test block, and the method comprises:

[0020] Filling an additive manufacturing micro-block into each first receiving groove of the first additive manufacturing block, ensuring that an additive manufacturing micro-block with an artificial defect is placed in at least one first receiving groove;

[0021] Inserting the first additive manufacturing block and the second additive manufacturing block together to assemble a comparison test block;

[0022] Scanning the comparison test block at least once using an industrial CT detection method to obtain detection data;

[0023] Determine whether the industrial CT detection method can meet the required sensitivity requirements based on the detection data.

[0024] Preferably, when the sensitivity verification requirement for the industrial CT detection method is relatively low, an additively manufactured micro-block with artificial defects is placed in at least two first containing grooves, and the comparison test block is scanned at least once using the industrial CT detection method.

[0025] Preferably, when the sensitivity verification requirement for the industrial CT detection method is high, the same additively manufactured micro-block with artificial defects is placed one by one in multiple first receiving grooves, and a scan is performed each time it is placed in a first receiving groove.

[0026] Beneficial effects of the present invention:

[0027] The present invention provides an industrial CT detection comparison test block, wherein a first additive manufacturing block and a second additive manufacturing block are plugged into each other, an additive manufacturing micro-block is sealed and filled in the first additive manufacturing block, and then the comparison test block formed by the plugging is scanned by an industrial CT detection method, and the detection sensitivity of the industrial CT detection method can be verified according to the scanning result; at least one additive manufacturing micro-block in a first receiving groove is provided with an artificial defect of the order of μm, and the additive manufacturing micro-blocks in the remaining first receiving grooves have no artificial defects and are used as fillers, so that the number of additive manufacturing micro-blocks with artificial defects can be changed and the additive manufacturing micro-blocks with artificial defects can be replaced in different first receiving grooves for verification, so as to realize the detection sensitivity verification of different areas of the comparison test block and increase the scope of application; moreover, the artificial defects reach the order of μm, with high precision, and the accuracy of sensitivity verification can be improved.

[0028] The present invention also provides a method for manufacturing an industrial CT detection comparison test block, firstly, a first additive manufacturing block, a second additive manufacturing block and an additive manufacturing micro block are printed by an additive printing method; then, an artificial defect of the order of μm is machined on a part of the additive manufacturing micro blocks by a precision machining method. The use of the precision machining method can machine artificial defects with higher precision, thereby improving the accuracy of sensitivity verification.

[0029] The present invention also provides an industrial CT detection comparison test block detection method. First, the first additive manufacturing block, the additive manufacturing micro block and the second additive manufacturing block are plugged and assembled, and then the industrial CT detection method is used to scan and verify to determine its detection sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the industrial CT detection comparison test block in a decomposed state provided by the first embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of a first structure of an industrial CT detection comparison test block provided in the first embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of a second structure of an industrial CT detection comparison test block provided in the first embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the third structure of the industrial CT detection comparison test block provided in the first embodiment of the present invention.

[0034] In the figure:

[0035] 1. First additive manufacturing block; 2. Second additive manufacturing block; 3. Additive manufacturing micro block; 4. Third additive manufacturing block; 5. Fourth additive manufacturing block;

[0036] 11. First receiving groove; 21. First protrusion; 22. Second receiving groove; 41. Second protrusion; 51. Third protrusion. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "installed" should be understood in a broad sense, for example, it can be an installed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0041] Embodiment 1

[0042] like Figures 1 to 4 As shown, the present embodiment provides an industrial CT detection comparison test block, which includes a first additive manufacturing block 1, a second additive manufacturing block 2 and a plurality of additive manufacturing micro blocks 3, a plurality of mutually spaced first receiving grooves 11 are provided on one side surface of the first additive manufacturing block 1; a plurality of mutually spaced first protrusions 21 are provided on one side surface of the second additive manufacturing block 2, and the depth of the first receiving groove 11 is greater than the height of the first protrusion 21; the bottom end of each first receiving groove 11 can be sealed and filled with an additive manufacturing micro block 3, the top end of each first receiving groove 11 can be sealed and filled with a first protrusion 21, and the first protrusion 21 and the additive manufacturing micro block 3 in the same first receiving groove 11 are in contact with each other, and an artificial defect of the order of μm is provided on the additive manufacturing micro block 3 in at least one first receiving groove 11.

[0043] The industrial CT detection comparison test block provided in this embodiment has a first additive manufacturing block 1 and a second additive manufacturing block 2 inserted into each other, and the additive manufacturing micro-block 3 is sealed and filled in the first additive manufacturing block 1, and then the comparison test block formed by the insertion is scanned by the industrial CT detection method, and the detection sensitivity of the industrial CT detection method can be verified according to the scanning result; at least one of the additive manufacturing micro-blocks 3 in the first receiving groove 11 is provided with an artificial defect of the order of μm, and the additive manufacturing micro-blocks 3 in the other first receiving grooves 11 have no artificial defects, and are used as fillers, and the number of additive manufacturing micro-blocks 3 with artificial defects can be changed and the additive manufacturing micro-blocks 3 with artificial defects can be replaced into different first receiving grooves 11 for verification, so as to realize the detection sensitivity verification of different areas of the comparison test block, so that the verification method is more flexible and the scope of application is increased. Moreover, the artificial defects reach the order of μm, and the accuracy is high, which can improve the accuracy of sensitivity verification.

[0044] The industrial CT detection comparison test block provided in this embodiment also includes a third additive manufacturing block 4, on one side of which a plurality of mutually spaced second protrusions 41 are arranged, and on the side of the second additive manufacturing block 2 different from the first protrusion 21, a plurality of mutually spaced second receiving grooves 22 are opened, and each second receiving groove 22 can simultaneously seal and fill a second protrusion 41 and an additive manufacturing micro-block 3, and at least one of the additive manufacturing micro-blocks 3 in the second receiving groove 22 is provided with an artificial defect. The setting of the third additive manufacturing block 4 can realize the detection of artificial defects at more different positions, making the detection method more flexible and diverse, and further improving the accuracy of sensitivity verification.

[0045] In order to achieve sealing and plugging, the cross-sectional shapes of the first receiving groove 11 and the second receiving groove 22 are the same and both are sealed with the cross-sectional shape of the additively manufactured micro-block 3. The sum of the height of the additively manufactured micro-block 3 and the height of the first protrusion 21 is equal to the depth of the first receiving groove 11, and the sum of the height of the additively manufactured micro-block 3 and the height of the second protrusion 41 is equal to the depth of the second receiving groove 22, ensuring that there is no gap inside when plugged together, avoiding the gap as a new defect and affecting the detection results.

[0046] Specifically, the first protrusion 21 and the second receiving groove 22 are respectively arranged on two opposite sides of the second additive manufacturing block 2. This arrangement facilitates the insertion of the first additive manufacturing block 1, the second additive manufacturing block 2 and the third additive manufacturing block 4, making the assembled structure stable and convenient for detection.

[0047] Optionally, the industrial CT inspection comparison test block provided in this embodiment also includes a fourth additive manufacturing block 5, and a plurality of third protrusions 51 are arranged on one side surface of the fourth additive manufacturing block 5, and a plurality of third receiving grooves are opened on the side surface of the third additive manufacturing block 4 opposite to the second protrusions 41. The plurality of third protrusions 51 are inserted into the plurality of third receiving grooves in a one-to-one correspondence, and the additive manufacturing micro-blocks 3 are filled in the third receiving grooves, thereby further realizing the detection of artificial defects at more different positions.

[0048] like Figure 2 As shown in the figure, the additive manufacturing micro-block 3 corresponding to the second protrusion 41 on the leftmost side of the third additive manufacturing block 4 is provided with an artificial defect, and the rest are free of artificial defects. Of course, the additive manufacturing micro-block 3 with artificial defects can also be placed in other second containing grooves 22, and multiple additive manufacturing micro-blocks 3 with artificial defects can also be placed. The specific location and number of artificial defects are determined according to actual detection requirements.

[0049] Alternatively, if Figure 2 As shown, the first additive manufacturing block 1, the second additive manufacturing block 2 and the third additive manufacturing block 4 are all cylindrical, and the diameters of the bottom surfaces of the three are the same. After being inserted together, they form a large cylindrical structure, which is used to simulate the sensitivity of the industrial CT detection method to defect detection in cylindrical metal additive manufacturing parts.

[0050] Alternatively, if Figure 3 As shown, the first additive manufacturing block 1, the second additive manufacturing block 2, the third additive manufacturing block 4 and the fourth additive manufacturing block 5 are all truncated cone-shaped and are assembled into a large truncated cone structure for simulating the sensitivity of the industrial CT detection method to the defect detection of truncated cone-shaped metal additive manufacturing parts.

[0051] Alternatively, if Figure 4As shown, the first additive manufacturing block 1, the second additive manufacturing block 2, the third additive manufacturing block 4 and the fourth additive manufacturing block 5 are plugged and assembled into a spherical structure, which is used to simulate the sensitivity of the industrial CT detection method for defect detection in spherical metal additive manufacturing parts. Of course, it can also be assembled into other shapes, and the specific shape can be designed and manufactured according to the appearance characteristics of the inspected parts.

[0052] Optionally, the additive manufacturing micro block 3 may be a cubic block. Accordingly, the cross-sections of the first receiving groove 11, the second receiving groove 22 and the third receiving groove are all square. The additive manufacturing micro block 3 may also be a cylinder, and accordingly, the cross-sections of the first receiving groove 11, the second receiving groove 22 and the third receiving groove are all circular. Of course, the additive manufacturing micro block 3 may also be a cuboid, etc., which are not listed here one by one.

[0053] Specifically, the plurality of first receiving grooves 11 are evenly arranged along a straight line, and of course, can also be arranged along an arc or an irregular line.

[0054] Optionally, the artificial defect includes a blind hole 31, the diameter and depth of the blind hole 31 are the same, so as to simulate a hole defect. Of course, it can also include a stripe-shaped groove to simulate a crack defect, further increasing the detection range.

[0055] Embodiment 2

[0056] This embodiment provides a method for manufacturing an industrial CT detection comparison test block, which is used to manufacture the industrial CT detection comparison test block proposed in the first embodiment, wherein the components identical or corresponding to the first embodiment are marked with the corresponding reference numerals of the first embodiment, and the comparison test block manufacturing method includes:

[0057] S1. Printing a first additive manufacturing block 1, a second additive manufacturing block 2 and an additive manufacturing micro block 3 using an additive printing method.

[0058] First, according to the material characteristics of the inspected part, a plurality of additively manufactured micro-blocks 3 of equal volume are printed using an additive printing method, for example, a cube with a size of 1 mm×1 mm×1 mm.

[0059] Then, the comparison test block model is designed according to the appearance characteristics of the inspected part, and the corresponding cavities in the detection sensitivity focus area on the comparison test block should be reserved to place the additive manufacturing micro-block 3, usually the comparison test block shaft area, near surface area, upper and lower side areas, etc. The comparison test block design is divided into several separable sections to facilitate the placement of the additive manufacturing micro-blocks 3 located in each cavity. For example, the design model of the comparison test block is divided into a first additive manufacturing block 1, a second additive manufacturing block 2, a third additive manufacturing block 4, and a fourth additive manufacturing block 5, etc.

[0060] Finally, according to the design models of the designed first additive manufacturing block 1, the second additive manufacturing block 2, the third additive manufacturing block 4 and the fourth additive manufacturing block 5, entities are printed out using an additive printing method.

[0061] S2. Using precision machining methods to machine artificial defects of μm magnitude on a portion of the additively manufactured micro-blocks 3.

[0062] First, according to the detection sensitivity requirements of the inspected parts, one or more additive manufacturing micro-blocks 3 are processed by precision machining methods or laser processing methods to produce artificial defects of corresponding sizes to be detected. For example, if the inspected parts need to detect a hole defect of 0.03 mm, a small hole with a diameter of 0.03 mm and a depth of 0.03 mm is drilled on the additive manufacturing micro-block 3. Then, the additive manufacturing micro-blocks 3 are accurately measured using high-resolution detection equipment such as micro-focus high-resolution industrial CT, and the additive manufacturing micro-blocks 3 with high-precision artificial defects are selected to be used as qualified additive manufacturing micro-blocks 3, which is conducive to improving the accuracy of detection. Moreover, by accurately measuring the additive manufacturing micro-blocks 3, the additive manufacturing micro-blocks 3 that have defects in the printing stage can also be excluded, further improving the accuracy of detection.

[0063] Embodiment 3

[0064] This embodiment provides an industrial CT detection comparison test block detection method, using the industrial CT detection comparison test block proposed in Example 1, wherein the components identical or corresponding to those in Example 1 use the corresponding reference numerals in Example 1, and the comparison test block detection method:

[0065] S1. Fill an additive manufacturing micro-block 3 into each first containing groove 11 of the first additive manufacturing block 1, and ensure that at least one first containing groove 11 contains an additive manufacturing micro-block 3 with artificial defects.

[0066] S2, inserting the first additive manufacturing block 1 and the second additive manufacturing block 2 to assemble into a comparison test block.

[0067] S3. Use the industrial CT detection method to scan the comparison test block at least once to obtain the detection data.

[0068] S4. Determine whether the industrial CT detection method can meet the required sensitivity requirements based on the detection data. If the artificial defects in all areas of the comparison test block are identified, the industrial CT detection method can meet the sensitivity requirements for detecting defects of the same size in the inspected parts.

[0069] Specifically, when the sensitivity verification requirement for the industrial CT detection method is relatively low, the additive manufacturing micro-block 3 with artificial defects is placed in at least two first containing grooves 11, and the industrial CT detection method is used to perform at least one scan on the test block to be detected. In a single scan, the additive manufacturing micro-block 3 with artificial defects is placed in multiple detection sensitivity focus areas at the same time, which can improve the efficiency of the sensitivity verification of the industrial CT detection method.

[0070] Specifically, when the sensitivity verification requirements that the industrial CT detection method can achieve are high, the same additively manufactured micro-block 3 with artificial defects is placed one by one in multiple first receiving grooves 11, and a scan is performed each time a first receiving groove 11 is placed. In each scan, the additively manufactured micro-block 3 with artificial defects is placed in only one of the first receiving grooves 11, so that in the process of verifying the detection sensitivity, the size and shape of the artificial defects in the different detection sensitivity focus areas of the comparison test block can be kept strictly consistent. Of course, it is also possible to selectively change the position in the multiple first receiving grooves 11, the multiple second receiving grooves 22, and the multiple third receiving grooves. When all areas on the comparison test block can accurately detect artificial defects, it means that the industrial CT detection method meets the corresponding sensitivity requirements.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An industrial CT detection comparison test block, characterized in that: include: A first additive manufacturing block (1), wherein a plurality of mutually spaced first accommodating grooves (11) are provided on one side surface of the first additive manufacturing block (1); a second additive manufacturing block (2), wherein a plurality of mutually spaced first protrusions (21) are arranged on one side surface of the second additive manufacturing block (2), and the depth of the first containing groove (11) is greater than the height of the first protrusion (21); A plurality of additively manufactured micro-blocks (3), the bottom end of each of the first containing grooves (11) being capable of being sealed and filled with one of the additively manufactured micro-blocks (3), the top end of each of the first containing grooves (11) being capable of being sealed and filled with one of the first protrusions (21), and the first protrusions (21) and the additively manufactured micro-blocks (3) in the same first containing groove (11) being in contact with each other, and at least one of the additively manufactured micro-blocks (3) in the first containing groove (11) being provided with an artificial defect of the order of μm.

2. The industrial CT detection comparison test block according to claim 1, characterized in that: It also includes a third additive manufacturing block (4), a side surface of which is provided with a plurality of second protrusions (41) spaced apart from each other, and a side surface of the second additive manufacturing block (2) which is different from the first protrusion (21) is provided with a plurality of second receiving grooves (22) spaced apart from each other, each of the second receiving grooves (22) being capable of sealing and filling one of the second protrusions (41) and one of the additive manufacturing micro-blocks (3) at the same time, and the artificial defect is provided on the additive manufacturing micro-block (3) in at least one of the second receiving grooves (22).

3. The industrial CT detection comparison test block according to claim 2, characterized in that: The first protrusion (21) and the second receiving groove (22) are respectively arranged on two opposite side surfaces of the second additive manufacturing block (2).

4. The industrial CT detection comparison test block according to claim 1, characterized in that: The additively manufactured micro-block (3) is a cubic block or a cylinder.

5. The industrial CT detection comparison test block according to claim 1, characterized in that: A plurality of the first accommodating grooves (11) are evenly arranged along a straight line.

6. The industrial CT detection comparison test block according to claim 1, characterized in that: The artificial defect comprises a blind hole, and the diameter and depth of the blind hole are the same.

7. A method for manufacturing an industrial CT detection comparison test block, characterized in that: For manufacturing the industrial CT detection comparison test block according to any one of claims 1 to 6, the method comprises: Printing a first additive manufacturing block (1), a second additive manufacturing block (2), and a plurality of additive manufacturing micro blocks (3) using an additive printing method; Artificial defects of the order of μm are machined on a portion of the additively manufactured micro-blocks (3) using a precision machining method.

8. An industrial CT detection comparison test block detection method, characterized in that: The industrial CT detection comparison test block according to any one of claims 1 to 6 is used, and the method comprises: Filling an additive manufacturing micro block (3) into each first containing groove (11) of the first additive manufacturing block (1), ensuring that an additive manufacturing micro block (3) having an artificial defect is placed in at least one first containing groove (11); Inserting the first additive manufacturing block (1) and the second additive manufacturing block (2) together to form a comparison test block; Scanning the comparison test block at least once using an industrial CT detection method to obtain detection data; Determine whether the industrial CT detection method can meet the required sensitivity requirements based on the detection data.

9. The industrial CT detection comparison test block detection method according to claim 8, characterized in that When the sensitivity verification requirement for the industrial CT detection method is relatively low, an additively manufactured micro-block (3) with artificial defects is placed in at least two first containing grooves (11), and the comparison test block is scanned at least once using the industrial CT detection method.

10. The industrial CT detection comparison test block detection method according to claim 8, characterized in that: When the sensitivity verification requirement for the industrial CT detection method is high, the same additively manufactured micro-block (3) with artificial defects is placed one by one in a plurality of first containing grooves (11), and a scan is performed each time it is placed in a first containing groove (11).

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