CN1324311C - Method for calibrating universal material pull-test machine - Google Patents
Method for calibrating universal material pull-test machine Download PDFInfo
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- CN1324311C CN1324311C CNB2005100426236A CN200510042623A CN1324311C CN 1324311 C CN1324311 C CN 1324311C CN B2005100426236 A CNB2005100426236 A CN B2005100426236A CN 200510042623 A CN200510042623 A CN 200510042623A CN 1324311 C CN1324311 C CN 1324311C
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Abstract
The present invention relates to a testing method of a universal material tension testing machine, a standard tension test sample is clamped on a testing machine according to a force value of a region to test of the testing machine; the standard tension test sample is tensioned via the testing machine according to a standard specified speed of a GB/T228-2002 standard; when the standard tension test sample is tensioned, an extensometer or a strain foil is arranged on the standard tension test sample, and the tension testing machine goes on to tension the standard tension test sample; the extensometer or the strain foil displays the elongation quantity of the standard tension test sample, and the elongation quantity is converted into a tension value; the tension value is compared with the same force value point of the standard tension test sample on a graduated circle of the tension testing machine; the technology state and the precision of the testing machine are determined according to the difference of the compared values. The method determines the precision of the testing machine by using a hooks law and comparing the force value converted from the elongation quantity of the standard tension test sample and the force value of the graduated circle of the testing machine. The method greatly simplifies the operation process of test, and is good for the convenience and the standardization of daily test of an original tension state of the testing machine.
Description
Technical field
The invention belongs to equipment calibrating metering field, relate to a kind of calibration method of universal material pull-test machine, with the state of the art of confirmed test machine and the accuracy of power value demonstration.
Background technology
Because testing machine is in usual work, can be subjected to various influences, as vibration, magnetic field, humiture, maintenance repair and temporary derangement eliminating etc., these all might have influence on the state of the art of testing machine, accuracy of experimental results is reduced, bring influence to scientific research and production, also may cause great loss to scientific research and production because of the guidance of its mistake, therefore be necessary the power value of universal material pull-test machine is carried out periodic, daily verification calibrating, with the accuracy class and the state of the art formedness of warranty test machine.
The calibrating metering of metal current material universal tensile testing machine is to finish by dynamometer, the most basic dynamometer has that mercury is box, optical profile type, spring standard dynamometer and strain gauge dynamometer, the principle of work of these dynamometers is that the pulling force with testing machine is converted into pressure, be converted into the macroscopic deformation amount again and carry out the metering of power value, its complex structure, the manufacturing cost height, need 2-3 people just can finish the work of certificate test machine, only using as the secondary standard dynamometer now, also is the method for measurement verification department year calibrating.
Summary of the invention
Loaded down with trivial details in order to solve present testing machine calibration method, the equipment needed thereby complex structure, the shortcoming that cost is high, the calibration method that the purpose of this invention is to provide a kind of universal material pull-test machine, it is easy and simple to handle, can examine and determine testing machine at any time, to guarantee the formedness of its accuracy class and state of the art.
The technical solution adopted in the present invention is, the calibration method of universal material pull-test machine, at first according to the power value of tested interval tension tester, choice criteria pulling force sample, the power value of standard tension sample be this interval full scale power value 60%～90% between select, with standard tension sample clamping on tension tester, speed by the GB/T228-2002 standard code allows tension tester that the standard tension sample is stretched, when having swing slightly, the pointer of tension tester stops at once stretching, be that the standard tension sample is in extended state, load onto extensometer or stick foil gauge this moment on the standard tension sample, speed by the GB/T228-2002 standard code allows tension tester continue the standard tension sample is stretched, extensometer or foil gauge show the elongation of standard tension sample, according to Hooke's law, elongation is scaled value of thrust, again with the tension tester scale on the power value point identical with the standard tension sample compare, come confirmed test machine technology state and precision according to the difference of comparison value.
The standard tension sample power value of selecting be this interval full scale power value 70%～80% between selection.
Method of the present invention has utilized the elastic deformation of material microworld to meet the rule of Hooke's law, only need to use the standard tension sample, it is connected with extensometer or electric wire strain gauge, by extensometer or electric wire strain gauge its elongation is exported, conversion is converted into value of thrust, this value of thrust is being put or linear metering gets final product.This method has been simplified the operating process of calibration equipment greatly, can realize the daily calibrating of the original extended state of metal material universal testing machine fully, testing machine field adjustable to new installation, debugging after day-to-day test machine fault is got rid of, the equipment and technology status checking brings great convenience and standardization before the Intermediate Checks of equipment, day-to-day test.
Embodiment
The invention will be further described below by example.
The calibration method of universal material pull-test machine, at first according to the power value of tested interval tension tester, choice criteria pulling force sample, the power value of standard tension sample be this interval full scale power value 60%～90% between select, effect is better between being chosen in 70%～80%, with standard tension sample clamping on tension tester, speed by the GB/T228-2002 standard code allows tension tester that the standard tension sample is stretched, when having swing slightly, the pointer of tension tester stops at once stretching, be that the standard tension sample is in extended state, load onto extensometer or stick foil gauge this moment on the standard tension sample, speed by the GB/T228-2002 standard code allows tension tester continue the standard tension sample is stretched, extensometer or foil gauge show the elongation of standard tension sample, according to Hooke's law, elongation is scaled value of thrust, again with the tension tester scale on the power value point identical with the standard tension sample compare, come confirmed test machine technology state and precision according to the difference of comparison value.Should adjust tension tester when the testing machine of 1 class precision grade is surpassed 1% error, should adjust tension tester line correction factor when system controlled by computer electronics universal tensile testing machine is surpassed 5 ‰ errors and get final product.
With the hydraulic testing machine is example, 60 tons of testing machine accuracy classes are one-level, when the scale power value of 30 tons of centres of need calibrating, select the standard tension sample of arbitrary power value of 18～27 tons to examine and determine by 60%～90% power value scope, such as the standard tension sample of selecting 24 tons, speed by the GB/T228-2002 standard code allows tension tester that the standard tension sample is stretched, when having swing slightly, pointer stops at once stretching, be installed in extensometer on the standard tension sample this moment, adjusting the extensometer dial gauge is zero point, begins to stretch, when the dial gauge pointer is 16 again, be that standard tension sample elongation is 0.16mm, corresponding value of thrust is 24 tons, scale pulling force indicating value in the middle of the 60 tons of testing machine pointer indications of read-write that stop this moment stretching, 0.1 ton of each calibration of middle scale, when pointer is in 23.76～24.24 tons of scopes, be that error is no more than 1%, prove that the testing machine state of the art is good, be the one-level testing machine, otherwise error surpasses 1%, should adjust tension tester and get final product less than 1% until error.
Can carry out a point or multiple spot calibrating continuously in this load section according to the standard tension sample of the identical definite value of load selection for system controlled by computer electronics universal tensile testing machine.
The definite value precision of method standard pulling force sample of the present invention is more than 5 ‰.
This method can use corresponding standard pulling force sample to examine and determine the tension tester of any power value.
Claims (2)
1. the calibration method of universal material pull-test machine, it is characterized in that, at first according to the power value of tested interval tension tester, choice criteria pulling force sample, the power value of standard tension sample should be selected in this interval full scale power value 60%～90% between, with standard tension sample clamping on tension tester, speed by the GB/T228-2002 standard code allows tension tester that the standard tension sample is stretched, when having swing slightly, the pointer of tension tester stops at once stretching, be that the standard tension sample is in extended state, load onto extensometer or stick foil gauge this moment on the standard tension sample, speed by the GB/T228-2002 standard code allows tension tester continue the standard tension sample is stretched, extensometer or foil gauge show the elongation of standard tension sample, according to Hooke's law, elongation is scaled value of thrust, again with the tension tester scale on indicated value of thrust compare, come confirmed test machine technology state and precision according to the difference that contrast obtains.
2. calibration method according to claim 1 is characterized in that, choice criteria pulling force sample, the power value of standard tension sample should be selected in this interval full scale power value 70%～80% between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100426236A CN1324311C (en) | 2005-04-29 | 2005-04-29 | Method for calibrating universal material pull-test machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100426236A CN1324311C (en) | 2005-04-29 | 2005-04-29 | Method for calibrating universal material pull-test machine |
Publications (2)
| Publication Number | Publication Date |
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| CN1687742A CN1687742A (en) | 2005-10-26 |
| CN1324311C true CN1324311C (en) | 2007-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100426236A Expired - Fee Related CN1324311C (en) | 2005-04-29 | 2005-04-29 | Method for calibrating universal material pull-test machine |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107402164A (en) * | 2017-08-08 | 2017-11-28 | 安吉元融仪器仪表检测有限公司 | A kind of method for verifying electronic tensile machine |
| CN107515168A (en) * | 2017-08-08 | 2017-12-26 | 安吉元融仪器仪表检测有限公司 | A kind of electronic tensile machine school detecting method |
| JP7472505B2 (en) * | 2020-01-24 | 2024-04-23 | 株式会社島津製作所 | Material testing machine and method for controlling material testing machine |
| CN112304760B (en) * | 2020-10-30 | 2022-12-16 | 广西玉柴机器股份有限公司 | Method for evaluating tensile strength of non-metallic gasket |
| CN113654887B (en) * | 2021-07-30 | 2024-05-24 | 中国航空工业集团公司济南特种结构研究所 | High-efficiency test method for tensile and compressive properties of composite material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2047370U (en) * | 1989-04-13 | 1989-11-08 | 国营江北机械厂 | Rhombus multirange standard dynamometric instrument |
| CN2173396Y (en) * | 1993-09-06 | 1994-08-03 | *** | Pull force sensor |
| JP2002131152A (en) * | 2000-10-27 | 2002-05-09 | Yazaki Corp | Fixing structure of sensing element |
-
2005
- 2005-04-29 CN CNB2005100426236A patent/CN1324311C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2047370U (en) * | 1989-04-13 | 1989-11-08 | 国营江北机械厂 | Rhombus multirange standard dynamometric instrument |
| CN2173396Y (en) * | 1993-09-06 | 1994-08-03 | *** | Pull force sensor |
| JP2002131152A (en) * | 2000-10-27 | 2002-05-09 | Yazaki Corp | Fixing structure of sensing element |
Non-Patent Citations (3)
| Title |
|---|
| MTS-QT/25电子拉力试验机的一种示值误差校正方法 刘智涛，计量与测试技术，第1期 2003 * |
| MTS-QT/25电子拉力试验机的一种示值误差校正方法 刘智涛，计量与测试技术，第1期 2003;浅谈拉力、压力和万能试验机的检定方法 王庆安，试验技术与试验机，第40卷第3、4期 2000 * |
| 浅谈拉力、压力和万能试验机的检定方法 王庆安，试验技术与试验机，第40卷第3、4期 2000 * |
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| CN1687742A (en) | 2005-10-26 |
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Granted publication date: 20070704 Termination date: 20120429 |