Penetrating agent performance detection method and detection tool

Abstract

The invention discloses a penetrant performance detection method and a detection tool. The detection method comprises the following steps: permeating, arranging a test block which is provided with a test surface, processing a plurality of strip-shaped defects with different widths on the test surface, and applying a penetrant to the positions of the plurality of strip-shaped defects on the test surface; removing residues, namely removing the redundant penetrant on the test surface; developing: applying a layer of developing agent with a preset thickness t on the test surface, and adsorbing the penetrating agent penetrating into the strip-shaped defect to the surface of the developing agent by using the developing agent to generate a defect image; and determining, observing and recording defect image conditions corresponding to different strip-shaped defects. According to the invention, the test block is arranged and a plurality of strip-shaped defects with different widths are processed on the test block, so that the strip-shaped defects with different widths are permeated by the penetrant, and the sensitivity condition of the penetrant to the defects with different widths can be detected and the permeability of the penetrant can be evaluated according to the development result of the subsequent defect image.

Description

Technical Field

[0001] The present invention relates to the technical field of defect detection, and in particular to a method and a tool for detecting performance of a penetrant. Background Art

[0002] During production and processing, workpieces may form tiny cracks or open defects on the surface. These tiny defects are difficult to observe with the naked eye and usually need to be measured by penetrant testing. Penetrant testing technology is a non-destructive testing technology based on the principle of capillary action. It mainly uses penetrants to penetrate into tiny defects on the surface of the workpiece and uses developers to adsorb the penetrants to the surface of the inspected workpiece to produce visible defect images on the surface of the workpiece to achieve the purpose of detection. Penetrants play a vital role in penetrant testing. Despite this, there is no standardized method in the prior art to evaluate the performance of penetrants. The existing differentiation methods are limited to determining whether a specific penetrant is suitable for the detection of a certain material, and do not go further into the penetration performance of the penetrant. Given that the penetration performance of the penetrant directly affects the accuracy of penetrant testing, it is particularly urgent to develop a detection method for evaluating the penetration performance of penetrants. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a method for detecting the performance of a penetrant, which detects the sensitivity of the penetrant and evaluates the penetration performance of the penetrant by setting a plurality of strip defects of different widths.

[0004] The invention also provides a detection tool applied to the penetrant performance detection method.

[0005] According to the first aspect of the present invention, the method for detecting the performance of a penetrant comprises the following steps:

[0006] Penetration, setting a test block, the test block having a test surface, the test surface being processed with a plurality of strip defects of different widths, and applying a penetrant to the plurality of strip defects on the test surface;

[0007] Removing excess penetrant from the test surface;

[0008] Development, applying a layer of developer with a preset thickness t on the test surface, and using the developer to adsorb the penetrant that has penetrated into the strip defect to the surface of the developer to generate a defect image;

[0009] Measure, observe and record the defect images corresponding to different strip defects.

[0010] The penetrant performance detection method described in the embodiment of the present invention has at least the following beneficial effects: by setting a test block and processing a plurality of strip defects of different widths thereon, the penetrant is allowed to penetrate the strip defects of different widths, and based on the subsequent development results of the defect image, the sensitivity of the penetrant to defects of different widths can be detected, thereby evaluating the penetration performance of the penetrant.

[0011] According to some embodiments of the present invention, the test block is made of a transparent material, and the plurality of strip-shaped defects have at least two different depth sizes, and when performing the penetration step, the depth of the penetrant penetrating into the corresponding strip-shaped defect is measured.

[0012] According to some embodiments of the present invention, the test block is optical glass.

[0013] According to some embodiments of the present invention, a ruler or scale lines are provided on one side of the test block.

[0014] According to some embodiments of the present invention, when performing the infiltration step, the time required for the penetrant to penetrate to the corresponding depth is recorded.

[0015] According to some embodiments of the present invention, the width of the strip defect ranges from 0.2 to 0.5 mm.

[0016] According to some embodiments of the present invention, the depth dimension of the stripe defect ranges from 0.2 to 8 mm.

[0017] According to some embodiments of the present invention, after the removal step and before the development step, the test surface is dried.

[0018] According to some embodiments of the present invention, during the development step, the preset thickness t is in the range of 25 to 45 microns.

[0019] The detection tool according to the second aspect of the embodiment of the present invention comprises a test block applied to the method for detecting the performance of a penetrant according to the first aspect of the embodiment of the present invention.

[0020] The detection tool described in the embodiment of the present invention has at least the following beneficial effects: by setting a plurality of strip defects of different widths on the test block and applying the above-mentioned penetrant performance detection method for detection, the sensitivity of the penetrant can be detected and the penetration performance of the penetrant can be evaluated.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a schematic diagram of the structure of a test block in a detection tool according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the partial cross-sectional structure of the test block.

[0025] Reference numerals:

[0026] Test block 10 , test surface 11 , strip defect 12 . DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it is necessary to understand that if it involves orientation description, the orientation or position relationship indicated by, for example, up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention.

[0029] In the description of the present invention, if the words such as several, greater than, less than, exceed, above, below, within, etc. appear, among which, several means one or more, more means more than two, greater than, less than, exceed, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself.

[0030] If the first and second are described, they are only used to distinguish the technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Reference Figure 1 and Figure 2 , a method for detecting penetrant performance, comprising the following steps:

[0033] Penetration, setting a test block 10, the test block 10 has a test surface 11, the test surface 11 is processed with multiple strip defects 12 of different widths, and applying a penetrant at the multiple strip defects 12 on the test surface 11;

[0034] Removing excess penetrant from the test surface 11;

[0035] Development, applying a layer of developer with a preset thickness t on the test surface 11, and using the developer to adsorb the penetrant that has penetrated into the strip defect 12 to the surface of the developer to generate a defect image;

[0036] Measure, observe and record defect images corresponding to different strip defects 12.

[0037] It is understandable that, when performing the penetration step, time should be reserved for the penetrant to penetrate into the strip defect 12, and the penetration step should be performed for no less than 10 minutes to avoid the penetrant failing to effectively penetrate into the strip defect 12 due to a short time. When performing the removal step, the excess penetrant on the test surface 11 can be removed by unidirectional wiping or scraping, and the penetrant that has penetrated into the strip defect 12 should be avoided. When performing the development step, the development time should be no less than 7 minutes to ensure that the penetrant can be effectively adsorbed. The development time should not be too long to avoid the penetrant spreading on the developer and causing a blurred defect image. The measurement step should be completed within 60 minutes after applying the developer. At the same time, the developer, penetrant residues and other contaminants of the strip defect 12 need to be removed in time after the measurement step. Figure 1 and Figure 2 As shown, the present invention sets a test block 10 and processes a plurality of strip defects 12 of different widths thereon, so that the penetrant can penetrate the strip defects 12 of different widths. According to the subsequent development results of the defect image, the sensitivity of the penetrant to defects of different widths can be detected, and the penetration performance of the penetrant can be evaluated.

[0038] In actual application, the number and length of the strip defects 12 can be set accordingly according to actual use needs.

[0039] In some embodiments, the test block 10 is made of a transparent material, and the plurality of stripe-shaped defects 12 have at least two different depths. When the penetration step is performed, the depth of the penetrant penetrating into the corresponding stripe-shaped defects 12 is measured.

[0040] It is understandable that if Figure 2 As shown, the multiple strip defects 12 have a variety of different depth sizes. By setting different depths, since the test block 10 is made of transparent material, it is possible to measure the depth of the penetrant penetrating into the corresponding strip defect 12 during the penetration step, thereby being able to detect the penetration depth capability of the penetrant and evaluate the penetration performance of the penetrant.

[0041] Further, the test block 10 is optical glass. It is understandable that by setting the test block 10 to be optical glass, it has a high degree of optical uniformity, transparency and stability, which is conducive to observing and measuring the penetration depth of the penetrant. In actual application, the test block 10 can also be a transparent high molecular polymer material.

[0042] Furthermore, a ruler or scale line (not shown) is provided on one side of the test block 10. It is understandable that by providing a ruler or scale line on the side of the test block 10, the ruler or scale line can be used as a reference to measure the depth data of the penetrant penetrating into the corresponding strip defect 12, which is convenient for use. In actual application, in addition to setting the ruler and scale line, the test block 10 can also be placed in a detection device, and the penetration depth of the penetrant can be automatically measured using the relevant detection device, which can be set accordingly according to actual use needs.

[0043] Furthermore, when the penetration step is performed, the time required for the penetrant to penetrate to the corresponding depth is recorded. It is understandable that by recording the penetration time of the penetrant, combined with the corresponding penetration depth and the aspect ratio of the corresponding strip defect 12, the diffusion rate of the penetrant can be obtained and the penetration performance of the penetrant can be evaluated.

[0044] In some embodiments, the width dimension of the strip defect 12 has a value range of 0.2-0.5 mm (including the endpoint value). It is understandable that the width dimension of 0.2-0.5 mm is a common width dimension of a crack defect of a workpiece. By setting the width dimension of the strip defect 12 to have a value range of 0.2-0.5 mm (including the endpoint value), the crack defect of the workpiece can be better simulated, which is convenient for detection. In actual application, the specific width dimension of the strip defect 12 can be set in the range of 0.2-0.5 mm, which can be set accordingly according to actual use needs.

[0045] In some embodiments, the depth dimension of the strip defect 12 has a value range of 0.2-8 mm (including the endpoint value). It is understandable that the depth dimension of 0.2-8 mm is a common depth dimension of a crack defect of a workpiece. By setting the depth dimension of the strip defect 12 to have a value range of 0.2-8 mm (including the endpoint value), the crack defect of the workpiece can be better simulated, which is convenient for detection. In actual application, the specific depth dimension of the strip defect 12 can be set in the range of 0.2-8 mm, which can be set accordingly according to actual use needs.

[0046] In some embodiments, after the excess removal step and before the development step, the test surface 11 is dried. It is understandable that after the excess removal step, the test surface 11 is dried to remove moisture from the test surface 11, which is conducive to allowing the penetrant to fully penetrate the strip defect 12 or to seep back onto the developer in the subsequent development step, so as to facilitate the subsequent development step. In actual application, the drying method can be natural air drying, air drying or heating drying, which can be set accordingly according to actual use needs.

[0047] In some embodiments, when performing the development step, the preset thickness t has a value range of 25 to 45 microns. It is understandable that when performing the development step, the thickness of the developer applied should not be too thick or too thin. The preset thickness t has a value range of 25 to 45 microns, which is conducive to avoiding the developer on the test surface 11 being too thick, resulting in blurred imaging, and avoiding the developer on the test surface 11 being too thin, resulting in the penetrant being unable to be effectively adsorbed from the strip defect 12, affecting subsequent measurements. In actual application, the preset thickness t can be 25 microns, 35 microns, or 45 microns, etc., and can be set accordingly according to actual use needs.

[0048] The detection tool according to the second embodiment of the present invention comprises a test block 10 applied to the method for detecting the performance of a penetrant according to the first embodiment of the present invention.

[0049] The detection tool according to the embodiment of the present invention can detect the sensitivity of the penetrant and evaluate the penetration performance of the penetrant by setting a plurality of strip defects 12 of different widths on the test block 10 and applying the above-mentioned penetrant performance detection method for detection.

[0050] In actual application, the detection tool may also include a stopwatch, a timer, etc. for recording time, which can be set accordingly according to actual use needs and will not be described in detail here.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A method for detecting penetrant performance, characterized in that: The following steps are involved: Penetration, setting a test block, the test block having a test surface, the test surface being processed with a plurality of strip defects of different widths, and applying a penetrant to the plurality of strip defects on the test surface; Removing excess penetrant from the test surface; Development, applying a layer of developer with a preset thickness t on the test surface, and using the developer to adsorb the penetrant that has penetrated into the strip defect to the surface of the developer to generate a defect image; Measure, observe and record the defect images corresponding to different strip defects.

2. The method for detecting penetrant performance according to claim 1, characterized in that: The test block is made of transparent material, and there are at least two different depths between the plurality of strip-shaped defects. When the penetration step is performed, the depth of the penetrant penetrating into the corresponding strip-shaped defects is measured.

3. The method for detecting penetrant performance according to claim 2, characterized in that: The test block is made of optical glass.

4. The method for detecting penetrant performance according to claim 2, characterized in that: A ruler or scale lines are provided on one side of the test block.

5. The method for detecting penetrant performance according to claim 2, characterized in that: As the infiltration step is performed, the time required for the penetrant to penetrate to the corresponding depth is recorded.

6. The method for detecting penetrant performance according to claim 1, characterized in that: The width of the strip defect has a value range of 0.2-0.5 mm.

7. The method for detecting penetrant performance according to claim 1, characterized in that: The depth dimension of the stripe defect ranges from 0.2 to 8 mm.

8. The method for detecting penetrant performance according to claim 1, characterized in that: After the removal step and before the development step, the test surface is dried.

9. The method for detecting penetrant performance according to claim 1, characterized in that: When performing the developing step, the preset thickness t is in the range of 25 to 45 microns.

10. A detection tool, characterized in that: The invention comprises a test block applied to the method for detecting the performance of a penetrant according to any one of claims 1 to 9.

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