CN102721607B - A deformation measuring device for a boss-free metal material high-temperature tensile test - Google Patents
A deformation measuring device for a boss-free metal material high-temperature tensile test Download PDFInfo
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- CN102721607B CN102721607B CN201110076672.7A CN201110076672A CN102721607B CN 102721607 B CN102721607 B CN 102721607B CN 201110076672 A CN201110076672 A CN 201110076672A CN 102721607 B CN102721607 B CN 102721607B
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Abstract
The invention relates to a deformation measuring device for a boss-free metal material high-temperature tensile test, comprising a spring, an upper scissor type device, a lower scissor type device, an upper clamp, a lower clamp, extension rods, deformation sensors, and a high-temperature furnace, wherein both the upper clamp and the lower clamp are arranged in the high-temperature furnace, the upper part of the upper clamp is provided with the upper scissor type device while the lower part of the upper clamp is fixed to the extension rods, and the upper part of the lower clamp is provided with the low scissor type device while the lower part of the lower clamp is fixed to the extension rods; the top ends of both the upper scissor type device and the lower scissor type device are connected with the spring and reaches out of the upper opening of the high-temperature furnace, making sure the upper clamp and the lower clamp firmly clamp a sample with force applied by the spring; the lower ends of the extension rods reaches out reach out of the lower opening of the high-temperature furnace and respectively connects with the two deformation sensors on the two symmetrical sides of the sample, thereby forming a two-side measuring system to measure the deformation value of the sample. Compared with the prior art, the device can measure the deformation value within a gauge length during the high-temperature tensile test of not only an ordinary boss-free metal material sample such as wires, bars, and pipes, and the like, but also a multi-strand special boss-free metal material sample such as steel tendons and the like.
Description
Technical field
The present invention relates to Metal Materials At High Temperature stretching mechanical property testing field, is a kind of while carrying out high temperature tension test for wire rod, bar, tubing, steel tendon etc. without boss metal materials sample, measures the technique device of its gauge length internal strain amount.
Background technology
At present, when carrying out high temperature tension test without boss metal materials sample (as wire rod, bar, tubing etc.), adopt when method is measured gauge length internal strain comparatively accurately both at home and abroad, device used mostly is side-plug-in extensometer.This kind of extensometer can only be realized the monolateral measurement to sample deformation, makes the sample deformation measurement machine malalignment that is put to the test cause the eccentric impact of load larger, and measuring accuracy is not high enough; Its range is limited, and gauge length is below 50mm; Owing to mostly being imported product, expensive.In addition, this extensometer is mainly applicable to single sample, for looking like the special in boss metal materials sample of the Multi-strands such as steel strand wires and steel tendon, only can measure the high temperature deformation amount of outer wires, and can not measure the deflection of sample entirety, is therefore difficult to be suitable for.
Summary of the invention
The object of the invention is to provide a kind of applied range in order to overcome the deficiency that above-mentioned prior art exists, can realize bilateral measurement, be applicable to the deformation measuring device used without boss metal materials high temperature tension test.
Technical scheme of the present invention is:
One without boss metal materials deformation measuring device used for high-temperature tensile test, is characterized in that, comprises spring, upper scissor arrangement, lower scissor arrangement, upper fixture, lower clamp, the bar of extending, deformation-sensor, high temperature furnace, described upper fixture, lower clamp are all placed in high temperature furnace, and upper fixture top arranges scissor arrangement, the bottom bar of fixedly extending, lower clamp top arranges lower scissor arrangement, the bottom bar of fixedly extending; Described upper scissor arrangement, lower scissor arrangement top all connect with spring, and it is suitable for reading to stretch out high temperature furnace, pass through spring-loaded, make fixture, lower clamp clamp securely sample, stretch out from high temperature furnace end opening the described bar lower end of extending, connect deformation-sensor in the symmetrical both sides of sample, form bilateral measuring system, to measure the deformation values of sample.
Described upper fixture comprises two clamping plate that clamp the relative both sides of sample, and two clamping plate one end are fixed together, and the other end connects respectively scissor arrangement.
Described upper scissor arrangement comprises two scissor hinged pull bars, two pull bar one end are connected in fixture, the other end interconnects by spring, and two clamping plate that the elastic force of spring makes fixture enter in evenly in sample stretches elongated, the process that attenuates, firm grip sample all the time.
Described lower clamp comprises two clamping plate that clamp the relative both sides of sample, and two clamping plate one end are fixed together, and the other end connects respectively lower scissor arrangement.
Described lower scissor arrangement comprises two scissor hinged pull bars, two pull bar one end are connected in lower clamp, the other end interconnects by spring, and two clamping plate that the elastic force of spring makes lower clamp enter in evenly in sample stretches elongated, the process that attenuates, firm grip sample all the time.
The described bar of extending comprises four, and upper fixture bottom is fixed two, and lower clamp bottom is fixed two, and four bar lower ends of extending are arranged on orienting lug, and ensure the to extend axis of bar and the axis of sample are parallel.
Described deformation-sensor is differential transformer displace￣ ment transducer, and totally two, symmetry is arranged on sample both sides, each deformation-sensor connects two bars of extending, form a bilateral measuring system, to measure the relative shift between upper fixture and lower clamp, draw sample high temperature deformation value.
The beneficial effect of apparatus of the present invention is: compared with prior art, apparatus of the present invention not only can solve as wire rod (as steel wire), bar, tubing etc. are common without boss metal materials sample, can also solve the deformation measurement problem while carrying out high temperature tension test as this Multi-strand of steel tendon special without boss metal materials sample, the applicable temperature range of this device is 0～1000 DEG C, can measure sample from elastic deformation till the overall process deflection of fracture, can realize bilateral measurement, avoid the impact of the eccentric tension that monolateral measurement brings, improve measuring accuracy, and expense is cheaply more a lot of than the monolateral extensometer of the side-plug-in of import.Apparatus of the present invention are complete has tested simple root metal material sample if steel wire and special type Multi-strand metal material sample are as the each relevant mechanical property of steel tendon under drawing by high temperature.
Brief description of the drawings
Fig. 1 is the structural representation in apparatus of the present invention longitudinal profile;
Fig. 2 is the structural representation in apparatus of the present invention other direction longitudinal profile;
Fig. 3 is the planar structure schematic diagram of apparatus of the present invention;
In figure: 1-metal material sample, 2-spring, the upper scissor arrangement of 3-, scissor arrangement under 4-, the upper fixture of 5-, 6-lower clamp, the 7-bar a that extends, the 8-bar b that extends, the 9-bar c that extends, the 10-bar d that extends, 11-high temperature furnace, 12-orienting lug, 13-differential transformer displace￣ ment transducer a, 14-differential transformer displace￣ ment transducer b.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figures 1 to 3, a kind of without boss metal materials deformation measuring device used for high-temperature tensile test, comprise spring 2, upper scissor arrangement 3, lower scissor arrangement 4, upper fixture 5, lower clamp 6, the bar a7 that extends, bar b8 extends, bar c9 extends, the bar d10 that extends, high temperature furnace 11, orienting lug 12, differential transformer displace￣ ment transducer a13, differential transformer displace￣ ment transducer b14.
When use, first lower chuck on metal material sample 1 use cupping machine is clamped, then according to the sample marking distance of reserving, two clamping plate of upper fixture 5 are fixed to the upper gauge length end of sample, two clamping plate one end are fixed together, the other end connects respectively scissor arrangement 3, it is suitable for reading that high temperature furnace 11 is stretched out on the top of two scissor hinged pull bars of upper scissor arrangement 3, and interconnect by spring 2, the elastic force of spring makes that two clamping plate are elongated at sample, enter firm grip sample all the time in the process that attenuates in evenly.
In like manner, two clamping plate of lower clamp 6 are fixed to the lower gauge length end of sample, two clamping plate one end are fixed together, the other end connects respectively lower scissor arrangement 4, it is suitable for reading that high temperature furnace 11 is stretched out on the top of two scissor hinged pull bars of lower scissor arrangement 4, and connect by spring 2, spring force makes that two clamping plate are elongated at sample, enter firm grip sample all the time in the process that attenuates in evenly.
Upper fixture 5 bottoms connect two bars of extending: bar a7 and the bar c9 that extends extend, lower clamp 6 bottoms connect two bars of extending: bar b8 and the bar d10 that extends extend, stretch out from high temperature furnace 11 end openings four bar lower ends of extending, be arranged on orienting lug 12, and adjust straight, the bar a7 that extends is connected differential transformer displace￣ ment transducer a13 with the bar b8 lower end of extending, the bar c9 that extends is connected differential transformer displace￣ ment transducer b14 with the bar d10 lower end of extending, form bilateral measuring system in the both sides of sample symmetry like this, in high temperature tension test process, differential transformer displace￣ ment transducer a13 and differential transformer displace￣ ment transducer b14 can record respectively the relative displacement of sample between upper fixture 5 and lower clamp 6, high temperature deformation amount in using the mean value of two groups of data as sample marking distance section.
Claims (2)
1. without a boss metal materials deformation measuring device used for high-temperature tensile test, it is characterized in that, comprise spring, upper scissor arrangement, lower scissor arrangement, upper fixture, lower clamp, the bar of extending, deformation-sensor, high temperature furnace, described upper fixture, lower clamp are all placed in high temperature furnace, and upper fixture top arranges scissor arrangement, the bottom bar of fixedly extending, lower clamp top arranges lower scissor arrangement, the bottom bar of fixedly extending; Described upper scissor arrangement, lower scissor arrangement top all connect with spring, and it is suitable for reading to stretch out high temperature furnace, pass through spring-loaded, make fixture, lower clamp clamp securely sample, stretch out from high temperature furnace end opening the described bar lower end of extending, connect deformation-sensor in the symmetrical both sides of sample, form bilateral measuring system, to measure the deformation values of sample;
Described upper fixture comprises two clamping plate that clamp the relative both sides of sample, and two clamping plate one end are fixed together, and the other end connects respectively scissor arrangement;
Described upper scissor arrangement comprises two scissor hinged pull bars, two pull bar one end are connected in fixture, the other end interconnects by spring, and two clamping plate that the elastic force of spring makes fixture enter in evenly in sample stretches elongated, the process that attenuates, firm grip sample all the time;
Described lower scissor arrangement comprises two scissor hinged pull bars, two pull bar one end are connected in lower clamp, the other end interconnects by spring, and two clamping plate that the elastic force of spring makes lower clamp enter in evenly in sample stretches elongated, the process that attenuates, firm grip sample all the time;
The described bar of extending comprises four, and upper fixture bottom is fixed two, and lower clamp bottom is fixed two, and four bar lower ends of extending are arranged on orienting lug, and ensure the to extend axis of bar and the axis of sample are parallel;
Described deformation-sensor is differential transformer displace￣ ment transducer, and totally two, symmetry is arranged on sample both sides, each deformation-sensor connects two bars of extending, form a bilateral measuring system, to measure the relative shift between upper fixture and lower clamp, draw sample high temperature deformation value.
2. one according to claim 1 is without boss metal materials deformation measuring device used for high-temperature tensile test, it is characterized in that, described lower clamp comprises two clamping plate that clamp the relative both sides of sample, and two clamping plate one end are fixed together, and the other end connects respectively lower scissor arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110076672.7A CN102721607B (en) | 2011-03-29 | 2011-03-29 | A deformation measuring device for a boss-free metal material high-temperature tensile test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110076672.7A CN102721607B (en) | 2011-03-29 | 2011-03-29 | A deformation measuring device for a boss-free metal material high-temperature tensile test |
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| Publication Number | Publication Date |
|---|---|
| CN102721607A CN102721607A (en) | 2012-10-10 |
| CN102721607B true CN102721607B (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110076672.7A Expired - Fee Related CN102721607B (en) | 2011-03-29 | 2011-03-29 | A deformation measuring device for a boss-free metal material high-temperature tensile test |
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| CN (1) | CN102721607B (en) |
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| CN104374361B (en) * | 2013-08-12 | 2017-06-09 | 中航试金石检测科技有限公司 | Plate creep extensometer |
| CN104374646B (en) * | 2013-08-12 | 2017-07-14 | 中航试金石检测科技有限公司 | Bar creep deformation extensometer |
| CN103557784B (en) * | 2013-11-07 | 2016-01-13 | 中国科学院金属研究所 | The original position real-time monitoring system of fatigue testing specimen gauge length section strain in high-temperature high pressure water |
| CN103542894B (en) * | 2013-11-12 | 2016-01-20 | 哈尔滨工业大学 | Reinforcement stresses, strain measurement method under high temperature change loading speed |
| CN104748665B (en) * | 2015-03-17 | 2017-10-20 | 西安交通大学 | The sensor of material strain under a kind of measurement hot environment |
| CN105136102B (en) * | 2015-06-29 | 2017-10-31 | 浙江蓝宝石仪表科技有限公司 | The chamber of metal material deflection and its detection method |
| CN106168472B (en) * | 2016-08-26 | 2020-02-14 | 中国科学院武汉岩土力学研究所 | Cuboid sample lateral displacement measuring device |
| CN107389444A (en) * | 2017-09-19 | 2017-11-24 | 中国核动力研究设计院 | A kind of ceramic high temperature bend test chucking appliance system of measurable deformation |
| CN109855963B (en) * | 2018-12-27 | 2021-12-24 | 华东理工大学 | Tensile-shear combined ductile fracture experiment system and method |
| CN111854593B (en) * | 2020-06-22 | 2021-07-20 | 同济大学 | Digital sensor based on multistage deformation surmounts early warning |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206841U (en) * | 1987-04-20 | 1988-06-08 | 工程兵工程学院 | Friction type clamp for pure tensile test of concrete |
| CN101608988A (en) * | 2009-07-20 | 2009-12-23 | 江苏大学 | A kind of uni-directional stretching test clamp for warm shaping of metal plate |
| CN201555776U (en) * | 2009-10-16 | 2010-08-18 | 长春科新试验仪器有限公司 | Gauge length internal strain measuring device for thin-wall tube high-temperature tensile test |
| CN202057290U (en) * | 2011-03-29 | 2011-11-30 | 同济大学 | Deformation measuring device used for high-temperature tensile test of no-boss metal materials |
-
2011
- 2011-03-29 CN CN201110076672.7A patent/CN102721607B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206841U (en) * | 1987-04-20 | 1988-06-08 | 工程兵工程学院 | Friction type clamp for pure tensile test of concrete |
| CN101608988A (en) * | 2009-07-20 | 2009-12-23 | 江苏大学 | A kind of uni-directional stretching test clamp for warm shaping of metal plate |
| CN201555776U (en) * | 2009-10-16 | 2010-08-18 | 长春科新试验仪器有限公司 | Gauge length internal strain measuring device for thin-wall tube high-temperature tensile test |
| CN202057290U (en) * | 2011-03-29 | 2011-11-30 | 同济大学 | Deformation measuring device used for high-temperature tensile test of no-boss metal materials |
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| CN102721607A (en) | 2012-10-10 |
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