CN212228819U - Universal bolt hole eddy current testing test block set - Google Patents
Universal bolt hole eddy current testing test block set Download PDFInfo
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- CN212228819U CN212228819U CN202020706627.XU CN202020706627U CN212228819U CN 212228819 U CN212228819 U CN 212228819U CN 202020706627 U CN202020706627 U CN 202020706627U CN 212228819 U CN212228819 U CN 212228819U
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- test block
- bolt hole
- eddy current
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Abstract
The utility model discloses a test block group is examined to general bolt hole vortex, including a plurality of test block base member, the test block base member is that the middle part is the cylinder of circular cone, and the test block base member is equipped with the axial line in circular cone inner wall one side and cuts the cut groove, and test block base member circular cone inner wall opposite side is equipped with a plurality of circumference ring cut groove, and the test block base member is at the scale that the outer wall that is close to circumference ring cut groove was equipped with. Simple structure, convenient to use realizes the needs that detect different specification bolt hole inner walls, realizes the coupling requirement and the sensitivity calibration of eddy current probe coil and adjusts, reduces customized special reference block, simplifies the detection procedure, saves reference block cost of manufacture, improves detection efficiency and suitability.
Description
Technical Field
The utility model relates to a vortex inspection technical field particularly, relates to a test block group is examined to general bolt hole vortex.
Background
The eddy current inspection technology is one of the longest inspection methods in the field of nondestructive inspection, is mainly used for quality inspection of raw materials such as pipes, bars and plates and equipment such as blades, bolts and nuts, and aims to find surface and near-surface defects of conductive materials; the eddy current inspection has wide application range and high reliability. The principle is based on electromagnetic induction, the change of induced eddy current in a detected workpiece is measured by measuring the change of the impedance of a detection coil, and the performance change or the defect-free conclusion of the detected workpiece is further evaluated.
The bolt connection mode is widely applied to the manufacture of large-scale mechanical equipment, and the inner wall of a bolt hole is subjected to tensile stress or torsional stress as a force bearing part for connecting different parts, so that fatigue cracks are easy to appear in use; when the bolt is removed and installed, heat damage cracks may occur if the bolt is heated by the heating rod and comes into contact with the inner wall of the bolt hole. Therefore, the detection of the inner wall of the bolt hole is an important content for the supervision of the bolt technology, and based on the advantages of eddy current detection, the inner wall of the bolt hole is usually inspected and detected by an eddy current detection method.
However, in engineering applications, bolt holes exist in a variety of sizes. When the eddy current inspection method is used for inspecting the inner wall of the bolt hole, the sensitivity of an eddy current inspection system needs to be calibrated and adjusted firstly, and the calibration and adjustment comprises selection of inspection parameters such as inspection frequency and phase and evaluation of defect size. At present, in order to ensure the close coupling of the detection coil and the hole wall, the diameter of the ball body of the detection coil embedded in the end part of the existing eddy current detection hole probe must be the same as that of the detected hole, so that when the bolt holes with different diameters are detected, the hole probes with a plurality of corresponding specifications and the reference blocks made of the materials with the corresponding specifications need to be customized to be matched, and great waste is caused.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model provides a test block group is examined to general bolt hole vortex, simple structure, convenient to use realizes detecting the needs of different specification bolt hole inner walls, realizes that the coupling of vortex probe coil requires and sensitivity calibration adjusts, reduces customized special reference block, simplifies the testing procedure, saves reference block cost of manufacture, improves detection efficiency and suitability.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a test block group is examined to general bolt hole vortex, includes a plurality of test block base member, the test block base member is the cylinder that the middle part is the circular cone hole, the test block base member is equipped with axial line cutting groove in circular cone hole inner wall one side, test block base member circular cone hole inner wall opposite side is equipped with a plurality of circumference ring cutting groove, the test block base member is being close to the scale that the outer wall of circumference ring cutting groove was equipped with.
Further, the test block base body is provided with three.
Preferably, the axial wire-cut grooves in the three test block substrates have depths of 0.2mm, 0.5mm and 1.0mm, respectively.
Preferably, the widths of the axial wire-cut grooves in the three test block matrixes are all 0.05 mm.
Further, the depths of the circumferential ring cutting grooves in the three test block substrates are 0.2mm, 0.5mm and 1.0mm, respectively.
Preferably, the circumferential ring cutting grooves in the three test block matrixes are all 0.05mm in width.
Further, the inner wall of the conical hole is provided with threads.
Preferably, the axial wire cut groove is a square groove parallel to the tapered surface.
Preferably, the section of the circumferential ring cutting groove is a semicircular square groove.
Further, the scale is marked with a numerical value in mm.
The utility model has the advantages that:
the detection coil coupling in the eddy current detection of bolt holes with various inner diameter specifications can be realized by adopting the cone bolt holes; 3 manual notches with different depths are adopted for simulating the defects of different sizes of the inner wall of the bolt hole; 2 manual grooves in different directions are adopted to simulate the defects of the inner wall of the bolt hole in different directions; the requirement of detecting the inner walls of bolt holes of various specifications is met by using the minimum number of test blocks of the test block group, and the coupling requirement and the sensitivity calibration adjustment of the eddy current probe coil are implemented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of a test block base according to an embodiment of the present invention;
FIG. 2 is a side view of a test block base according to an embodiment of the present invention;
FIG. 3 is a top view of a test block base according to an embodiment of the present invention;
in the figure:
1. a test block substrate; 2. a conical bore; 3. cutting grooves along an axial line; 4. cutting a groove circumferentially; 5. and (4) calibration.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
As shown in FIGS. 1-3, according to the embodiment of the utility model provides a test block group is examined to general bolt hole vortex, including a plurality of test block base member 1, test block base member 1 is the cylinder that the middle part is conical bore 2, test block base member 1 is equipped with axial line cutting groove 3 in conical bore 2 inner wall one side, test block base member 1 conical bore 2 inner wall opposite side is equipped with a plurality of circumference ring cutting groove 4, test block base member 1 is being close to scale 5 that circumference ring cutting groove 4's outer wall was equipped with.
In a specific embodiment of the present invention, three test block bases 1 are provided.
In a specific embodiment of the present invention, the depth of the axial linear cutting groove 3 in the test block base body 1 is three, and the depth is 0.2mm, 0.5mm and 1.0mm respectively.
In a specific embodiment of the present invention, the width of the axial line cutting groove 3 in the three test block base bodies 1 is 0.05 mm.
In a specific embodiment of the present invention, the depth of the circumferential ring cutting groove 4 in the three test block base bodies 1 is 0.2mm, 0.5mm and 1.0mm, respectively.
In a specific embodiment of the present invention, the width of the circumferential ring cutting groove 4 in three test block base bodies 1 is 0.05 mm.
In a specific embodiment of the present invention, the inner wall of the conical hole 2 is provided with a thread.
In one embodiment of the present invention, the axial wire cutting groove 3 is a square groove parallel to the conical surface.
In one embodiment of the present invention, the circumferential ring cutting groove 4 has a semicircular square groove in cross section.
In a specific embodiment of the present invention, the scale 5 is marked with a numerical value in mm.
For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.
In the utility model, each group comprises 3 test blocks, and cone bolt holes are adopted to simulate bolt holes with various internal diameter specifications; and marking the numerical value of the aperture size of the bolt at each depth position by using a graduated scale outside the test block.
And selecting three test block matrixes 1 according to artificial grooves with different depths in each group, wherein the three test block matrixes are respectively marked as TYLKSK-1, TYLKSK-2 and TYLKSK-3.
The corresponding artificial groove depth is 0.2mm, 0.5mm and 1.0mm respectively;
the width of the manual notch groove is 0.05 mm;
the other design specifications and sizes are the same;
the three manual notches are used for simulating the defects of different sizes of the inner wall of the bolt hole.
The manual grooving of each test block base body 1 comprises an axial line cutting groove 3 parallel to the axis of the inner wall of the cone bolt hole and a circumferential ring cutting groove 4 parallel to the circumferential direction of the inner wall of the cone bolt hole.
The two manual notches are used for simulating the defects of the inner wall of the bolt hole in different directions.
When the bolt hole eddy current test device is used specifically, the numerical value of the inner diameter of the bolt hole of the detected bolt is measured in advance, then the universal bolt hole eddy current test block TYLKSK-1 is selected, the numerical value of the inner diameter of the corresponding bolt hole is found on an external graduated scale, and the depth position corresponding to the position is measured by the upper end face of the steel plate ruler.
Selecting a universal bolt hole eddy current detection hole probe, extending the probe to a corresponding depth position, adjusting the universal bolt hole eddy current detection hole probe, circumferentially rotating the probe at the depth, utilizing axial linear cutting manual grooving and circumferential circular cutting manual grooving, selecting detection parameters such as detection frequency and phase according to instrument operation rules, and determining detection sensitivity.
After the adjustment of each parameter is finished, the eddy current detection of the inner wall of the bolt hole can be carried out on the detected bolt, and if the detection finds that the signal exceeds the reference sensitivity amplitude, the TYLKSK-2 test blocks and the TYLKSK-3 test blocks are sequentially used by the same method to judge and find the approximate size of the defect depth.
In summary, with the above technical solution of the present invention, detection coil coupling during eddy current detection of bolt holes with various inner diameter specifications can be realized; 3 manual notches with different depths are adopted for simulating the defects of different sizes of the inner wall of the bolt hole; 2 manual grooves in different directions are adopted to simulate the defects of the inner wall of the bolt hole in different directions; the requirement of detecting the inner walls of bolt holes of various specifications is met by using the minimum number of test blocks of the test block group, and the coupling requirement and the sensitivity calibration adjustment of the eddy current probe coil are implemented.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a test block group is examined to general bolt hole vortex, includes a plurality of test block base member (1), its characterized in that, test block base member (1) is the cylinder that the middle part is conical bore (2), test block base member (1) is equipped with axial line cutting groove (3) in conical bore (2) inner wall one side, test block base member (1) conical bore (2) inner wall opposite side is equipped with a plurality of circumference ring cutting groove (4), test block base member (1) is being close to scale (5) that the outer wall of circumference ring cutting groove (4) was equipped with.
2. The universal bolt hole eddy current test block set according to claim 1, wherein there are three test block bases (1).
3. The universal bolt hole eddy current test block set according to claim 2, characterized in that the depths of the axial line cutting grooves (3) in the three test block base bodies (1) are 0.2mm, 0.5mm and 1.0mm, respectively.
4. The universal bolt hole eddy current test block set according to claim 2 or 3, wherein the widths of the axial line cutting grooves (3) in the three test block base bodies (1) are all 0.05 mm.
5. The universal bolt hole eddy current testing block set according to claim 2, characterized in that the depths of the circumferential ring cutting grooves (4) in the three test block base bodies (1) are 0.2mm, 0.5mm and 1.0mm, respectively.
6. The universal bolt hole eddy current testing block set according to claim 2 or 5, characterized in that the circumferential ring cutting grooves (4) in the three test block base bodies (1) are all 0.05mm wide.
7. The universal bolt hole eddy current test block set according to claim 1, characterized in that the inner wall of the conical hole (2) is threaded.
8. The universal bolt hole eddy current test block set according to claim 4, characterized in that the axial wire cut groove (3) is a square groove parallel to the conical surface.
9. The universal bolt hole eddy current test block set according to claim 6, wherein the circumferential ring cutting groove (4) is a semicircular square groove in cross section.
10. The universal bolt hole eddy current test block set according to claim 1, characterized in that the scale (5) is engraved with a numerical value in mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020706627.XU CN212228819U (en) | 2020-04-30 | 2020-04-30 | Universal bolt hole eddy current testing test block set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020706627.XU CN212228819U (en) | 2020-04-30 | 2020-04-30 | Universal bolt hole eddy current testing test block set |
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| Publication Number | Publication Date |
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| CN212228819U true CN212228819U (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020706627.XU Active CN212228819U (en) | 2020-04-30 | 2020-04-30 | Universal bolt hole eddy current testing test block set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155952A (en) * | 2021-03-26 | 2021-07-23 | 中国飞机强度研究所 | Test block for testing internal crack capability of eddy current detection multilayer structure and application method thereof |
-
2020
- 2020-04-30 CN CN202020706627.XU patent/CN212228819U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155952A (en) * | 2021-03-26 | 2021-07-23 | 中国飞机强度研究所 | Test block for testing internal crack capability of eddy current detection multilayer structure and application method thereof |
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Address after: No. 2096, Beijing New Energy Technology Research Institute Patentee after: Guoneng boiler and Pressure Vessel Inspection Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION Co.,Ltd. |