CN101587047A - High-precision force value loading adjusting device for hardness meter - Google Patents
High-precision force value loading adjusting device for hardness meter Download PDFInfo
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- CN101587047A CN101587047A CNA2009101580728A CN200910158072A CN101587047A CN 101587047 A CN101587047 A CN 101587047A CN A2009101580728 A CNA2009101580728 A CN A2009101580728A CN 200910158072 A CN200910158072 A CN 200910158072A CN 101587047 A CN101587047 A CN 101587047A
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Abstract
The invention relates to a high-precision force value loading and adjusting device for a hardness tester, which comprises a high-rigidity machine body, a pressure head lifting device and a working platform lifting coarse adjustment device, wherein a piezoelectric ceramic force value loading block formed by overlapping a plurality of pieces of piezoelectric ceramics is arranged on a force value loading central axis of the device, the circuit connection structure of the piezoelectric ceramics is in a parallel connection mode, excitation voltage of the piezoelectric ceramics is provided by a driver through positive and negative electrode wires, and the driver is controlled by a computer.
Description
Technical field
The present invention is a kind of high-precision hardness tester force value loading adjusting device, belongs to the technical field of structures of product.
Background technology
At present, high precision standard hardness tester force value loading system mostly adopts counterweight dead weight mode to realize both at home and abroad, and the standard hardness tester force loading device physical construction of Zhi Zuoing is huge thus, maintenance and operation is inconvenient, need periodic calibration, inefficiency.And in other existing sclerometers, electromagnetic type power value charger can be realized little power value adjusting, but is difficult to realize the desired maximum load power of Brinell test value.Electrodynamic type and fluid pressure type power value loading structure can be realized the quick loading that is worth energetically, but power value degree of regulation can only reach ± 1%, can not satisfy accuracy requirement as standard machine ± 0.1%.
Summary of the invention
The present invention designs at the deficiency that exists in the above-mentioned existing product just a kind of high-precision hardness tester force value loading adjusting device is provided, it adopts the piezoceramic material distortion to drive the loading of the power of testing, the value of exerting all one's strength precision surpasses ± 0.1%, has simultaneously to respond advantage fast, compact conformation.
Piezoceramic material has been widely used in fields such as micrometric displacement precision positioning, ultrasonic transducer and force standard machines, but the high-precision force value loading adjusting device that the inverse piezoelectric effect of utilizing piezoceramic material is made is applied in standard hardness tester, does not also have relevant report.
The objective of the invention is to be achieved through the following technical solutions:
This kind high-precision hardness tester force value loading adjusting device, comprise body, pressure head jacking gear, workbench, workbench lifting device and motor, the top of pressure head jacking gear connects power value sensor, it is characterized in that: the piezoelectric ceramics power value loading blocks that is superimposed as by the multi-disc piezoelectric ceramics is installed on the axis that the power value of this device loads, the circuit connection structure of multi-disc piezoelectric ceramics is a parallel way, its driving voltage is provided by driver by the positive and negative electrode line, and driver is by computer control;
The sheet number of piezoelectric ceramics (2) is calculated by following formula:
In the formula: δ is under External Electrical Field, the static output of piezoelectric ceramics loading blocks (2) displacement; s
33Submissive coefficient for stupalith on the polarised direction; P is a power output; S is the potsherd area; L is a single ceramic sheet thickness; N is the potsherd number of plies; d
33Be the piezoelectric strain coefficient; U is for applying voltage.
Along with the understanding to piezoelectric ceramic technology is progressively goed deep into, utilize the inverse piezoelectric effect of piezoelectric ceramics, the power value small quantity that is applied under the heavy load situation is regulated, and is applied.Yet the applied research that the inverse piezoelectric effect of piezoelectric ceramics is applied to the hardness tester force value loading system does not also have relevant report.In the application of force standard machines, because the loading one-piece construction rigidity of force standard machines is bigger, deflection is little, and there is not the restriction of overshoot and load time in the power value loading procedure, only be concerned about that the power value index after stablizing gets final product, thereby be easy to carry out the adjusting and the control of loading force value, it is longer often to load the steady control time.And in the hardness tester force value loading procedure, because the singularity of hardness test, exist under the bigger plastic yield situation in tested sample, not only require the quick loading (finishing in 6s ~ 8s) of realizable force value, and require overshoot do not allow the overshoot value ± 0.1%, be time in the hardness tester force value loading procedure and overshoot index request all specific force standard machine more strict restriction is arranged, therefore the afterburning mode of this kind is applied to scleroscopic power value load domains and still belongs to the first time.
Minimum because of the telescopic displacement of piezoelectric ceramics, it uses the loading that is not enough to finish the power value separately, so adopt load maintainer electronic and that piezoelectric ceramics is connected mutually in power value loading structure.During beginning, computer control driven by motor lead screw transmission, the one-level that realizes test force loads, and monitor output in real time by force transducer, when feedback force value during near expectation value, motor stops operating and keeps, and computing machine is transferred control Piezoelectric Ceramic source, finishes the loading and the fine adjustments of remaining force value.Because technical solution of the present invention adopts thickness second order force value Loading Control mode, degree of regulation is very high.
Description of drawings
Fig. 1 is the structural representation of piezoelectric ceramics power value loading blocks in apparatus of the present invention
Fig. 2 is the structural representation that piezoelectric ceramics power value loading blocks is installed in the workbench below in apparatus of the present invention
Fig. 3 is the structural representation that piezoelectric ceramics power value loading blocks is installed in pressure head jacking gear top in apparatus of the present invention
Specific embodiments
To be further described apparatus of the present invention with embodiment with reference to the accompanying drawings below:
Shown in accompanying drawing 1～3, this kind high-precision hardness tester force value loading adjusting device, comprise body 6, pressure head jacking gear 4, workbench 8, workbench lifting device 1 and motor 7, the top of pressure head jacking gear 4 connects power value sensor 5, the piezoelectric ceramics power value loading blocks 2 that is superimposed as by multi-disc piezoelectric ceramics 2 is installed on the axis that the power value of this device loads, piezoelectric ceramics power value loading blocks 2 can be installed in the below of workbench 3, also can be installed in the top of pressure head jacking gear 4, piezoelectric ceramics power value loading blocks 2 is with upper cover plate 12 by pretension bolt 11, lower cover 13 and multilayer piezoelectric ceramic sheet 2 are fixed together, the circuit connection structure of multi-disc piezoelectric ceramics 2 is a parallel way, positive and negative electrode line 8 links to each other with driver 9, its driving voltage is provided by driver 9, driver 9 is by computing machine 10 controls, and the power value that piezoelectric ceramics power value loading blocks 2 produces changes by power value sensor 5 gives computing machine 10 with measurement feedback;
The sheet number of piezoelectric ceramics (2) is calculated by following formula:
In the formula: δ is under External Electrical Field, the 2 static output displacements of piezoelectric ceramics loading blocks; s
33Submissive coefficient for stupalith on the polarised direction; P is a power output; S is the potsherd area; L is a single ceramic sheet thickness; N is the potsherd number of plies; d
33Be the piezoelectric strain coefficient; U is for applying voltage.
Under External Electrical Field, the last formula of representing with static output displacement is deformed into:
Properties of materials parameter such as submissive coefficient, piezoelectric strain coefficient etc. and dimensional parameters such as potsherd area, potsherd thickness all are the influence factors of power output as can be seen, just by controlling the power output of driving voltage U controllable driver.
In the course of the work, workbench lifting device 1 is fixed on the rigid frame of the extraordinary body 6 of rigidity, pressure head jacking gear 4, test specimen 3 on 1 pair of workbench 8 of workbench lifting device applies original pressure, the coarse adjustment of this process realizable force value, computing machine 10 timely collection power value sensor 5 detected power value signals, computing machine 10 carries out regulating after the analyzing and processing driving voltage of driver 9 to image data according to pre-set programs, the driving voltage that piezoelectric ceramics power value loading blocks 2 is provided according to driver 9 carries out the flexible of corresponding amount, carry out the accurate adjustment of power value, guaranteed to impose on the high-precision force value of test specimen 3 thus.According to the actual tests situation, the swell increment of potsherd under 3 tons of loads gets final product greater than 30 μ m.
Technical solution of the present invention goes in the power value loading system of all static sclerometers (Rockwell, surperficial Rockwell, Vickers, micro-etc.).
Technical solution of the present invention compares the precision that can the value of exerting all one's strength loads and surpasses with prior-art devices ± 0.1%, have simultaneously that response is fast, the advantage of compact conformation.
Claims (1)
1. high-precision hardness tester force value loading adjusting device, comprise body (6), pressure head jacking gear (4), workbench (3), workbench lifting device (1) and motor (7), the top of pressure head jacking gear (4) connects power value sensor (5), it is characterized in that: the piezoelectric ceramics power value loading blocks (2) that is superimposed as by multi-disc piezoelectric ceramics (2) is installed on the axis that the power value of this device loads, the circuit connection structure of multi-disc piezoelectric ceramics (2) is a parallel way, its driving voltage is provided by driver (9) by positive and negative electrode line (8), and driver (9) is controlled by computing machine (10);
The sheet number of piezoelectric ceramics (2) is calculated by following formula:
In the formula: δ is under External Electrical Field, the static output of piezoelectric ceramics loading blocks (2) displacement; s
33Submissive coefficient for stupalith on the polarised direction; P is a power output; S is the potsherd area; L is a single ceramic sheet thickness; N is the potsherd number of plies; d
33Be the piezoelectric strain coefficient; U is for applying voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009101580728A CN101587047A (en) | 2009-07-20 | 2009-07-20 | High-precision force value loading adjusting device for hardness meter |
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| CNA2009101580728A CN101587047A (en) | 2009-07-20 | 2009-07-20 | High-precision force value loading adjusting device for hardness meter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866065A (en) * | 2012-09-10 | 2013-01-09 | 中国科学院半导体研究所 | Continuous pressurizing device |
| RU2473069C1 (en) * | 2011-08-11 | 2013-01-20 | Федеральное государственное образовательное учреждение высшего профессионального образования "Калининградский пограничный институт Федеральной службы безопасности Российской Федерации" | Device for measuring strength of solid body |
| CN103308406A (en) * | 2013-06-06 | 2013-09-18 | 成都瑞拓科技实业有限责任公司 | Coaxial pressure approaching type hardness detector |
| CN104297083A (en) * | 2014-10-17 | 2015-01-21 | 上海集成电路研发中心有限公司 | Silicon wafer hardness testing device |
| CN104807708A (en) * | 2015-05-07 | 2015-07-29 | 济南时代试金仪器有限公司 | Fully automatic Rockwell hardness meter and control method |
| CN105223098A (en) * | 2015-10-28 | 2016-01-06 | 上海核工程研究设计院 | A kind of control rod hook and connecting rod wear resistance test device |
| CN108151959A (en) * | 2018-01-11 | 2018-06-12 | 浙江大学 | Sinusoidal force on-line calibration device based on PZT (piezoelectric transducer) |
| CN108318179A (en) * | 2018-01-11 | 2018-07-24 | 浙江大学 | Sinusoidal force on-line calibration device based on piezoelectric ceramics |
| CN112129431A (en) * | 2020-09-11 | 2020-12-25 | 合肥工业大学 | PVDF sensor array structure based on wrist and performance testing device thereof |
| CN114062170A (en) * | 2021-11-02 | 2022-02-18 | 中国航空工业集团公司北京长城计量测试技术研究所 | Balanced type micro force value loading device and method based on comb capacitor |
-
2009
- 2009-07-20 CN CNA2009101580728A patent/CN101587047A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2473069C1 (en) * | 2011-08-11 | 2013-01-20 | Федеральное государственное образовательное учреждение высшего профессионального образования "Калининградский пограничный институт Федеральной службы безопасности Российской Федерации" | Device for measuring strength of solid body |
| CN102866065A (en) * | 2012-09-10 | 2013-01-09 | 中国科学院半导体研究所 | Continuous pressurizing device |
| CN102866065B (en) * | 2012-09-10 | 2014-07-30 | 中国科学院半导体研究所 | Continuous pressurizing device |
| CN103308406A (en) * | 2013-06-06 | 2013-09-18 | 成都瑞拓科技实业有限责任公司 | Coaxial pressure approaching type hardness detector |
| CN104297083A (en) * | 2014-10-17 | 2015-01-21 | 上海集成电路研发中心有限公司 | Silicon wafer hardness testing device |
| CN104807708A (en) * | 2015-05-07 | 2015-07-29 | 济南时代试金仪器有限公司 | Fully automatic Rockwell hardness meter and control method |
| CN105223098A (en) * | 2015-10-28 | 2016-01-06 | 上海核工程研究设计院 | A kind of control rod hook and connecting rod wear resistance test device |
| CN105223098B (en) * | 2015-10-28 | 2024-04-09 | 上海核工程研究设计院股份有限公司 | Control rod claw and connecting rod wear resistance test device |
| CN108151959A (en) * | 2018-01-11 | 2018-06-12 | 浙江大学 | Sinusoidal force on-line calibration device based on PZT (piezoelectric transducer) |
| CN108318179A (en) * | 2018-01-11 | 2018-07-24 | 浙江大学 | Sinusoidal force on-line calibration device based on piezoelectric ceramics |
| CN112129431A (en) * | 2020-09-11 | 2020-12-25 | 合肥工业大学 | PVDF sensor array structure based on wrist and performance testing device thereof |
| CN114062170A (en) * | 2021-11-02 | 2022-02-18 | 中国航空工业集团公司北京长城计量测试技术研究所 | Balanced type micro force value loading device and method based on comb capacitor |
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