CN110823732A - Correction method for Vickers hardness test deviation of electronic glass - Google Patents
Correction method for Vickers hardness test deviation of electronic glass Download PDFInfo
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- CN110823732A CN110823732A CN201910931925.0A CN201910931925A CN110823732A CN 110823732 A CN110823732 A CN 110823732A CN 201910931925 A CN201910931925 A CN 201910931925A CN 110823732 A CN110823732 A CN 110823732A
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- G—PHYSICS
- 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
- G01N3/40—Investigating hardness or rebound hardness
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- G—PHYSICS
- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0098—Tests specified by its name, e.g. Charpy, Brinnel, Mullen
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Abstract
The invention discloses a correction method for Vickers hardness test deviation of electronic glass, and relates to the field of liquid crystal glass test. A correction method for Vickers hardness test deviation of electronic glass comprises the following steps: 1) measuring the Vickers hardness values of the standard microscopic Vickers hardness block and the sample to obtain the test value of the standard microscopic Vickers hardness block and the test value of the sample; the standard micro Vickers hardness block and the sample have the same test conditions; 2) and correcting the test deviation of the sample by using the deviation of the standard value and the test value of the standard micro Vickers hardness block. The correction method of the invention effectively reduces the Vickers hardness test deviation of the electronic glass through the test of introducing the standard microscopic Vickers hardness block and simple data processing.
Description
Technical Field
The invention belongs to the field of liquid crystal glass testing, and particularly relates to a correction method for Vickers hardness testing deviation of electronic glass.
Background
Hardness refers to the ability of a solid material to resist the force of other objects without residual deformation. The hardness of glass depends primarily on the chemical composition and structure. In the development process of the glass material side, the Vickers hardness of the glass is captured, and the material side is adjusted according to the relation between the hardness and the chemical components so as to obtain the electronic glass with proper hardness. The vickers hardness test procedure is as follows: indenting the glass surface by using a Vickers diamond square cone with a certain load force and load time, observing and selecting an indentation boundary by using a microscope system, and calculating the length of an indentation diagonal line; the vickers hardness is calculated by the following formula to characterize the strength of the glass hardness.
Wherein Hv-vickers hardness; f, the load force of the pressure head on the sample to be detected; d is the length of the diagonal of the indentation.
However, under the same conditions of loading time and loading force, the test results obtained by different testers are often difficult to be consistent, and the difference is from several to tens of differences, even more, twenty-three differences. This is mainly due to human eye vision errors, differences in the micro-focus and in the selected indentation boundary process. Therefore, in order to reduce human error, an automatic vickers hardness tester appears, and hardness indentations can be automatically selected to give test values. However, with the change of the test material, the impression mode is random, the accuracy of automatic capture is not high, and some even four corners of the impression can not be captured, the edge of the impression still needs to be confirmed by manual selection, and the human error still exists.
Disclosure of Invention
The invention aims to overcome the defect of Vickers hardness test deviation caused by difference of selected indentation boundaries and provides a correction method of the Vickers hardness test deviation of electronic glass.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a correction method for Vickers hardness test deviation of electronic glass comprises the following steps:
1) measuring the Vickers hardness values of the standard microscopic Vickers hardness block and the sample to obtain the test value of the standard microscopic Vickers hardness block and the test value of the sample;
the standard micro Vickers hardness block and the sample have the same test conditions;
2) correcting the test deviation of the sample by using the deviation of the standard value and the test value of the standard micro Vickers hardness block, wherein the calculation formula of the sample correction value is as follows:
further, the test conditions in the step 1) comprise a load test force and a pressure holding loading time.
Compared with the prior art, the invention has the following beneficial effects:
the correction method of the Vickers hardness test deviation of the electronic glass provided by the invention comprises the steps of testing the Vickers hardness of a sample and the Vickers hardness of a standard microscopic Vickers hardness block, calculating a deviation proportion by utilizing the deviation of a standard value and a test value of the standard microscopic Vickers hardness block, and correcting the test value of the sample according to the test deviation of the standard microscopic Vickers hardness block to obtain a corrected value.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, fig. 1 is a flow chart of the present invention, step 1) testing vickers hardness values of a standard microscopic vickers hardness block and a sample to obtain a test value of the standard microscopic vickers hardness block and a test value of the sample; comparing the deviation between the standard value of the standard micro Vickers hardness block and the test value of the tester, and calculating the deviation proportion; and correcting the test value of the sample according to the test deviation of the standard microscopic Vickers hardness block to obtain a final corrected true value.
Step 2) correcting the test deviation of the sample by using the deviation of the standard value and the test value of the standard microscopic Vickers hardness block, wherein the calculation formula of the corrected value of the sample is as follows:
example 1
Sample Y was selected, the standard value Hv of the standard micro vickers hardness block is 443, and the test was adjusted to: t is 25s, F is 200 g; 5 testers test the same sample, finally obtain an average value to correct, and the results are summarized as follows:
TABLE 15 test values and correction values for multiple tests performed by the same tester on the same sample
| Testing personnel | Sample test value | Standard microscopic dimension | Correction value |
| A | 560.9 | 452.1 | 549.4 |
| B | 541.2 | 438.0 | 547.3 |
| C | 551.1 | 445.6 | 547.9 |
| D | 534.8 | 438.4 | 540.4 |
| E | 526.3 | 433.7 | 537.3 |
| Extreme difference | 34.6 | 18.4 | 12.0 |
| Standard deviation of | 12.1 | 6.5 | 4.7 |
The results are summarized, and it can be seen that the test range of 5 testers on the sample is 34.6, after the test correction of the standard microscopic Vickers hardness block, the correction result range is reduced to 12.0, within the error range of the instrument (+ -15.0), and the data is valid. And the standard deviation of the sample test results of 5 testers is 12.1 through the analysis of the standard deviation, and the standard deviation of the results is reduced to 4.7 after the correction by the correction method, so that the numerical value of the final correction result is closer to the average value of the sample, the data discreteness is reduced, and the method is more accurate and credible.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (2)
1. The correction method for the Vickers hardness test deviation of the electronic glass is characterized by comprising the following steps of:
1) measuring the Vickers hardness values of the standard microscopic Vickers hardness block and the sample to obtain the test value of the standard microscopic Vickers hardness block and the test value of the sample;
the standard micro Vickers hardness block and the sample have the same test conditions;
2) correcting the test deviation of the sample by using the deviation of the standard value and the test value of the standard micro Vickers hardness block, wherein the calculation formula of the sample correction value is as follows:
2. the method for correcting the Vickers hardness test deviation of electronic glass according to claim 1, wherein the test conditions in step 1) include a load test force and a press-hold load time.
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| CN201910931925.0A CN110823732A (en) | 2019-09-29 | 2019-09-29 | Correction method for Vickers hardness test deviation of electronic glass |
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Citations (5)
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| 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 |
| CN102419282A (en) * | 2011-08-22 | 2012-04-18 | 中原特钢股份有限公司 | Manufacturing method of reference block for on-site conversion of Leeb hardness to Brinell hardness |
| CN105954132A (en) * | 2016-04-28 | 2016-09-21 | 启东雷泰精密仪器有限公司 | Vickers hardometer and hardness measurement and correction method |
| CN110231239A (en) * | 2018-05-07 | 2019-09-13 | 上海明华电力技术工程有限公司 | A kind of lee ' hardness detection error modification method |
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2019
- 2019-09-29 CN CN201910931925.0A patent/CN110823732A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| CN1338608A (en) * | 2001-09-28 | 2002-03-06 | 宁波永新光学股份有限公司 | System error correction method for fibre image measurement |
| CN102419282A (en) * | 2011-08-22 | 2012-04-18 | 中原特钢股份有限公司 | Manufacturing method of reference block for on-site conversion of Leeb hardness to Brinell hardness |
| 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 |
| CN105954132A (en) * | 2016-04-28 | 2016-09-21 | 启东雷泰精密仪器有限公司 | Vickers hardometer and hardness measurement and correction method |
| CN110231239A (en) * | 2018-05-07 | 2019-09-13 | 上海明华电力技术工程有限公司 | A kind of lee ' hardness detection error modification method |
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