CN113092301A - On-spot with experimental calibration test block of richter hardness - Google Patents
On-spot with experimental calibration test block of richter hardness Download PDFInfo
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- CN113092301A CN113092301A CN202110462332.1A CN202110462332A CN113092301A CN 113092301 A CN113092301 A CN 113092301A CN 202110462332 A CN202110462332 A CN 202110462332A CN 113092301 A CN113092301 A CN 113092301A
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- 238000012360 testing method Methods 0.000 title claims abstract description 121
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 25
- 238000012545 processing Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 description 38
- 238000003466 welding Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007542 hardness measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/62—Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups
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Abstract
本发明公开的一种现场用里氏硬度试验校准试块，属于检验检测技术领域。包括基础块和若干单体试块；基础块上设有若干安装孔，若干单体试块安装在安装孔内，若干单体试块的硬度值不同。若干不同硬度值的单体试块安装在基础块的安装孔中，保证了单体试块的稳定，不会在检测时发生位移和晃动。在检测目标的材质和加工工艺等参数确定后，可以根据上述参数选定若干硬度值的单体试块，然后现场再根据检测目标的实际硬度范围数值，在最合适的单体试块上对硬度计进行校核，可最大限度确保所使用硬度计的准确性。同时，只需要携带一个基础块和若干单体试块，就能够实现在一个试块上同时对不同硬度范围进行标定校核，大大提高了测试的精度、可操作性。
The invention discloses a field-use Leeb hardness test calibration test block, which belongs to the technical field of inspection and detection. It includes a base block and a number of single test blocks; the base block is provided with a number of mounting holes, a number of single test blocks are installed in the mounting holes, and the hardness values of the single test blocks are different. Several single test blocks with different hardness values are installed in the installation holes of the base block, which ensures the stability of the single test block and will not cause displacement and shaking during detection. After the parameters such as the material and processing technology of the test target are determined, a single test block with several hardness values can be selected according to the above parameters, and then on the spot, according to the actual hardness range value of the test target, on the most suitable single test block The hardness tester is checked to ensure the maximum accuracy of the hardness tester used. At the same time, only one basic block and several single test blocks need to be carried, so that the calibration and verification of different hardness ranges can be performed on one test block at the same time, which greatly improves the accuracy and operability of the test.
Description
Technical Field
The invention belongs to the technical field of inspection and detection, and relates to a field calibration test block for a Leeb hardness test.
Background
The hardness value of the metal material is one of important parameters for evaluating the mechanical property of the metal material, and can be obtained by a quick, economic and simple method, so that the hardness detection is widely applied to the inspection and detection of the metal material, for example, the hardness detection is one of main detection items for inspecting and accepting a steel pipe base metal and a welding line, and is also one of main items for evaluating the safety of pressure-bearing key equipment of an in-service generator set.
In the field maintenance of the in-service unit, the portable Richter hardness tester is mainly used for rapidly detecting the field hardness. The hardness standard test block is an essential part of a hardness tester and is the only verification method for confirming whether the test value of the hardness tester is accurate. Generally, the standard Richter hardness test block is large in size and weight and not easy to carry, and only one standard test block is usually used for calibration in field detection. The hardness value selectivity of the standard hardness test block is small in practice, the limitation is large, the hardness requirement range of different detected parts on site cannot be completely met, the difference between the hardness value range and the required hardness value range is often far, the hardness tester is calibrated by using the test block with a single hardness value, and when the hardness of the detected part with a large hardness range difference is measured, the measurement result cannot truly and accurately reflect the actual hardness value of the detected part.
Therefore, when the hardness requirement range of the part to be detected and the hardness value difference of the standard hardness test block of the Leeb hardness meter are large, large errors often occur when the part to be detected is detected, the false detection of the base metal and the welding line of the part is easily caused, and potential safety hazards and unnecessary loss are brought to a generator set.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a calibration test block for on-site hardness testing, which can calibrate and check different measurement ranges of a hardness tester to meet the requirement of hardness testing precision.
The invention is realized by the following technical scheme:
the invention discloses a field calibration test block for a Leeb hardness test, which comprises a foundation block and a plurality of monomer test blocks; be equipped with a plurality of mounting holes on the basis piece, a plurality of monomer test blocks are installed in the mounting hole, and the hardness number of a plurality of monomer test blocks is different.
Preferably, the single test block is an external thread cylinder, and the mounting hole is a screw hole matched with the thread of the single test block.
Preferably, the outer wall of the single test block and the inner wall of the mounting hole are respectively provided with a convex strip and a guide groove which are matched with each other.
Further preferably, the outer wall of the single test block is provided with a convex strip, the inner wall of the mounting hole is provided with a guide groove, the length of the guide groove is smaller than that of the mounting hole, and the length of the convex strip is equal to that of the guide groove.
Preferably, the mounting hole is a through hole, and an annular limiting boss is arranged in the mounting hole.
Preferably, the mounting hole is a blind hole, and the bottom of the mounting hole is provided with an exhaust hole communicated with the outside of the base block.
Preferably, the thickness of the monomer test block is greater than 70 mm.
Preferably, the total weight of the base block and the plurality of monomer test blocks is greater than 5 kg.
Preferably, the difference of the Brinell hardness of the monomer test blocks is 25-35 HBHLD.
Preferably, the distance between the axes of the adjacent mounting holes is 1.5 times the maximum width of the single test block.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the field-used Leeb hardness test calibration test block disclosed by the invention, the plurality of monomer test blocks with different hardness values are installed in the installation holes of the foundation block, so that the stability of the monomer test blocks is ensured, and displacement and shaking can not occur during detection. After the material quality, the processing technology and other parameters of the detection target are determined, the monomer test blocks with a plurality of hardness values can be selected according to the parameters, and then the hardness meter is checked on the most appropriate monomer test block according to the actual hardness range value of the detection target on site, so that the accuracy of the used hardness meter can be ensured to the maximum extent. Meanwhile, only one foundation block and a plurality of single test blocks need to be carried, calibration and checking of different hardness ranges on one test block can be achieved, and testing precision and operability are greatly improved.
Furthermore, the monomer test block is the external screw thread cylinder, and the mounting hole is the screw that matches with the screw of monomer test block, simple to operate, and it is comparatively inseparable to combine, and stability is high.
Further, monomer test block outer wall and mounting hole inner wall are equipped with sand grip and the guide slot that matches each other respectively, and this structure processing is simple, and the cooperation is good.
Further, when the mounting hole is the blind hole, the bottom of mounting hole is equipped with the exhaust hole with the outside intercommunication of basic piece, can avoid piston effect, and the installation is simple high-efficient.
Furthermore, the thickness of the single test block is larger than 70mm, the detection meets the relevant requirements, and the accuracy of the detection value is ensured.
Furthermore, the total weight of the foundation block and the plurality of monomer test blocks is more than 5kg, so that enough stability can be reported, the detection meets the relevant requirements, and the accuracy of the detection value is ensured.
Furthermore, the Brinell hardness difference value of the single test blocks is 25-35 HBHLD, the specification number of the single test blocks can be reduced on the premise of ensuring the detection range and precision, and therefore the manufacturing cost is reduced.
Furthermore, the distance between the axes of the adjacent mounting holes is 1.5 times of the maximum width of the single test block, so that the detection head of the hardness tester cannot enter the range of the adjacent single test block during detection, and the detection precision is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of embodiment 1;
FIG. 3 is a schematic structural view of example 5.
In the figure, 1 is a base block, 2 is a monomer test block, 2-1 is a first monomer test block, 2-2 is a second monomer test block, 2-3 is a third monomer test block, 2-4 is a fourth monomer test block, 2-5 is a fifth monomer test block, 3 is a mounting hole, 3-1 is a first mounting hole, 3-2 is a second mounting hole, 3-3 is a third mounting hole, 3-4 is a fourth mounting hole, and 3-5 is a fifth mounting hole.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples:
referring to fig. 1, the field calibration test block for the richter hardness test of the present invention comprises a base block 1 and a plurality of single test blocks 2; be equipped with a plurality of mounting holes 3 on the basis piece 1, a plurality of monomer test blocks 2 are installed in mounting hole 3, and the hardness number of a plurality of monomer test blocks 2 is different. The thickness of the monomer test block 2 is more than 70 mm; the total weight of the base block 1 and the plurality of monomer test blocks 2 is more than 5 kg; the Brinell hardness difference of the monomer test blocks 2 is 25-35 HBHLD; the distance between the axes of the adjacent mounting holes 3 is 1.5 times of the maximum width of the single test block 2.
Example 1
The basis piece 1 is the cylinder, is equipped with a plurality of cylinder mounting holes 3 on the basis piece 1, and after mounting hole 3 was installed into to a plurality of monomer test blocks 2, realized fixedly through the one end with the welding of basis piece 1 of monomer test block 2. The welding adopts spot welding and can be removed or replaced after detection.
Example 2
The foundation block 1 is a cylinder, a plurality of mounting holes 3 are arranged on the foundation block 1, the mounting holes 3 are screw holes, the single test block 2 is a stud, and the single test block 2 can be screwed into the mounting holes 3.
Example 3
Be equipped with a plurality of mounting holes 3 on the basis piece 1, be equipped with the sand grip on the outer wall of monomer test block 2, be equipped with the guide slot on the inner wall of mounting hole 3. Preferably, the length of the guide groove is smaller than that of the mounting hole 3, and the length of the convex strip is equal to that of the guide groove.
Example 4
Be equipped with a plurality of mounting holes 3 on the basis piece 1, mounting hole 3 is the through-hole, and the bottom region of mounting hole 3 is equipped with cyclic annular spacing boss.
Example 5
As shown in fig. 3, a plurality of mounting holes 3 are formed in the foundation block 1, the mounting holes 3 are blind holes, and exhaust holes communicated with the outside of the foundation block 1 are formed in the bottoms of the mounting holes 3.
The selection of the particular parameters of each component is further illustrated by the following one of the specific embodiments:
as shown in fig. 2, the base block 1 is a cylinder having a diameter of 120mm and a thickness of 70 mm. The foundation block 1 is provided with a first mounting hole 3-1, a second mounting hole 3-2, a third mounting hole 3-3, a fourth mounting hole 3-4 and a fifth mounting hole 3-5, wherein the axes of the first mounting hole, the second mounting hole, the third mounting hole, the fourth mounting hole and the fifth mounting hole are all parallel to the axis of the foundation block 1, the diameters of the 5 mounting holes are all 30mm, and the distance between the axes of the adjacent mounting holes is 40 mm.
The first monomer test block 2-1, the second monomer test block 2-2, the third monomer test block 2-3, the fourth monomer test block 2-4 and the fifth monomer test block 2-5 are cylinders, the diameters of the cylinders are 29mm, and the thicknesses of the cylinders are 70 mm; the Brinell hardness values of the 5 test blocks are 140-145 HBHLD, 180-185 HBHLD, 210-215 HBHLD, 250-255 HBHLD and 295-300 HBHLD respectively.
When the invention is used:
1) measuring the end faces of all the monomer test blocks 2 by using a desk type Brinell hardness tester which is qualified in verification, and calibrating the numerical values; obtaining the approximate hardness range value of the detection target according to the known parameters of the material, the processing technology and the like of the detection target, and carrying the single test block 2 according to the value;
2) after the monomer test block 2 and the foundation block 1 are assembled on site, selecting the monomer test block 2 with the closest numerical value according to the actual hardness numerical value of a detection target, measuring the monomer test block 2 by using a Leeb hardness tester, and checking the Leeb hardness tester according to the calibration numerical value and the measurement value of the monomer test block 2;
3) and testing the detection target by using the checked Leeb hardness tester.
It should be noted that the above description is only one embodiment of the present invention, and all equivalent changes of the system described in the present invention are included in the protection scope of the present invention. Persons skilled in the art to which this invention pertains may substitute similar alternatives for the specific embodiments described, all without departing from the scope of the invention as defined by the claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110462332.1A CN113092301A (en) | 2021-04-27 | 2021-04-27 | On-spot with experimental calibration test block of richter hardness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110462332.1A CN113092301A (en) | 2021-04-27 | 2021-04-27 | On-spot with experimental calibration test block of richter hardness |
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| CN113092301A true CN113092301A (en) | 2021-07-09 |
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| CN202110462332.1A Pending CN113092301A (en) | 2021-04-27 | 2021-04-27 | On-spot with experimental calibration test block of richter hardness |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607513A (en) * | 2021-07-20 | 2021-11-05 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking low-hardness 91 steel hardness value |
| CN113848100A (en) * | 2021-09-08 | 2021-12-28 | 河南中原特钢装备制造有限公司 | Manufacturing method of hardness comparison test block of chrome-plated layer of limit mandrel for continuous rolling mill |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323174A (en) * | 2011-09-16 | 2012-01-18 | 东莞市高品检测技术服务有限公司 | Method for calibrating hardness indicating value of rubber hardness gauge and standard blocks |
| CN208621445U (en) * | 2018-06-12 | 2019-03-19 | 山东恒量测试科技有限公司 | A kind of portable hardometer detection device |
| CN214749547U (en) * | 2021-04-27 | 2021-11-16 | 西安热工研究院有限公司 | A field-use Leeb hardness test calibration test block |
-
2021
- 2021-04-27 CN CN202110462332.1A patent/CN113092301A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323174A (en) * | 2011-09-16 | 2012-01-18 | 东莞市高品检测技术服务有限公司 | Method for calibrating hardness indicating value of rubber hardness gauge and standard blocks |
| CN208621445U (en) * | 2018-06-12 | 2019-03-19 | 山东恒量测试科技有限公司 | A kind of portable hardometer detection device |
| CN214749547U (en) * | 2021-04-27 | 2021-11-16 | 西安热工研究院有限公司 | A field-use Leeb hardness test calibration test block |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607513A (en) * | 2021-07-20 | 2021-11-05 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking low-hardness 91 steel hardness value |
| CN113607513B (en) * | 2021-07-20 | 2023-06-23 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking hardness value of low-hardness 91 steel |
| CN113848100A (en) * | 2021-09-08 | 2021-12-28 | 河南中原特钢装备制造有限公司 | Manufacturing method of hardness comparison test block of chrome-plated layer of limit mandrel for continuous rolling mill |
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