CN101706391B - Anti-adhesive shoulder fixture for improving efficiency of endurance test - Google Patents
Anti-adhesive shoulder fixture for improving efficiency of endurance test Download PDFInfo
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- CN101706391B CN101706391B CN200910250638XA CN200910250638A CN101706391B CN 101706391 B CN101706391 B CN 101706391B CN 200910250638X A CN200910250638X A CN 200910250638XA CN 200910250638 A CN200910250638 A CN 200910250638A CN 101706391 B CN101706391 B CN 101706391B
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Abstract
The invention discloses an anti-adhesive shoulder fixture for improving the efficiency of an endurance test, which aims to provide a novel test fixture structure to improve the efficiency of the endurance test, prevent the adhesion and the tripping between a specimen and a fixture and between the fixture and a pull rod of a testing machine, and ensure the authenticity and the reliability of the test. The technical scheme of the anti-adhesive shoulder fixture has the following key points that: the fixture adopts a shoulder type structure to prevent the adhesion and the tripping between the specimen and the fixture and the adhesion and the tripping between the fixture and the pull rod of the testing machine; a shoulder type serial connector is designed, and two specimens are connected in series and are synchronously tested on one testing machine so as to improve test efficiency; a shoulder large pull head adopts K002 high-temperature alloy, and the shoulder fixture and the shoulder type serial connector adopt directional high-temperature alloy DZ22 or single crystal high-temperature alloy DD3 to improve the applicable test temperature of the fixture to 1200 DEG C; and the fixture has simple operation and quick and convenient clamping, ensures the concentricity, and is applicable to different models of endurance testing machines produced by different testing machine manufacturers.
Description
Technical field
The present invention is a kind of anti shoulder fixture that improves duration running efficient, belongs to the technical field of structures of product.These anchor clamps can improve the lasting tension test efficient of metal, the adhesion and the dropout of the adhesion of anchor clamps and sample and dropout and anchor clamps and testing machine pull bar in preventing from again to test.
Background technology
The lasting tension test of metal material is a kind of test of test material creep rupture life under steady temperature and permanent load.It is the standard sample of φ 5 that the metal material stress-rupture tester is generally tested used now, and sample is connected with helicitic texture with frock clamp, and strength of joint is not high under the high temperature.Along with the development of material science, the resistance to elevated temperatures of material improves constantly, and the probe temperature that carries out stress-rupture tester also is enhanced thereupon; Raising along with probe temperature, intensity at high temperature to test fixture is had higher requirement, in long-term test practice, find, the common metal material is after probe temperature surpasses 900 ℃, the spiral shell of sample connecting thread and anchor clamps is buckled intensity all bigger reduction, high-temperature and durable creeping test for 900 ℃～1200 ℃ of temperature ranges, because of being easy to take place under oxidation ablation under the high temperature and the creep relaxation effect because of connecting thread and frock clamp adhesion or dropout, the carrying out of influence test, even cause scrapping and the breaking-up of anchor clamps of test sample.The anchor clamps of testing machine general standard configuration all are to carry out the anchor clamps that single sample is tested, and the testing efficiency of testing machine is lower.
Summary of the invention
The objective of the invention is to the problem that exists at above-mentioned existing frock clamp and design a kind of anti shoulder fixture that improves duration running efficient is provided, it is with a kind of simple version, improved the testing machine testing efficiency and had antiseized performance, the high-temperature and durable tension test of suitable metal material.
The objective of the invention is to be achieved through the following technical solutions:
This kind improves the anti shoulder fixture of duration running efficient, comprise big pull head and shoulder fixture, wherein, one end external thread structure of big pull head is connected with the testing machine pull bar, its other end is connected with shoulder fixture, and the other end of shoulder fixture is connected with an end of bar sample, the lower end of big pull head and shoulder fixture is a cylinder, it is characterized in that: at big pull head and shoulder fixture lower end cylinder middle part, have the through hole of a rectangular build with axial vertical direction, have the slotted hole of a UNICOM bottom surface and rectangular build through hole in the lower end of the big rectangular build through hole of pull head, the width D of the slotted hole on the big pull head is corresponding with the diameter of shoulder fixture upper links, the width H of the slotted hole on the shoulder fixture is then corresponding with the diameter of the bar of bar sample, the rectangular build through hole on big pull head and the shoulder fixture and the place that is communicated with of slotted hole, downward through hole of vertical direction processing vertically.
Through hole on the big pull head and rectangular build through hole be communicated with the place, vertical direction is processed global of recessed, the circular arc that is used to place shoulder fixture and bar sample connector vertically.
In addition, the anti shoulder fixture that this kind improves duration running efficient also provides a columniform series connection joint, have in the middle, the through hole of a rectangular build with axial vertical direction, have the slotted hole of a upper and lower end face of UNICOM and rectangular build through hole at the upper and lower end of through hole, the diameter of the width L of slotted hole and the bar of bar sample is corresponding, the diameter of shoulder fixture upper links is corresponding, is communicated with place, downward through hole of vertical direction processing vertically at rectangular build through hole and slotted hole.
These anchor clamps are considered the situation that sticks together in the test and thread off, the syndeton of frock clamp has been carried out new design, be designed to shoulder type structure, the connecting thread structure with the standard thread sample also is designed to shoulder type structure simultaneously, to satisfy the frock requirement of anchor clamps.Consider the situation that the testing machine testing efficiency is low simultaneously, designed shoulder type sample serial connection connector, can be on a testing machine two samples be together in series and test simultaneously, improve the testing machine testing efficiency.These anchor clamps by two overstrikings up and down directly with the testing machine pull bar with screw thread confine the big pull head of high strength shoulder that is connected and up and down being connected in series of the hanging shoulder fixture of two independent bodies and a shoulder type form, these anchor clamps both can carry out the test of single sample, can carry out the tandem test of two samples again.Because probe temperature is very high in the test, in order to guarantee the structural strength of anchor clamps, the material that the big pull head of shoulder, shoulder fixture and shoulder type series connection joint are selected for use is strengthened, can be used for the creep rupture test below 1200 ℃.These anchor clamps are guaranteed the concentricity requirement of anchor clamps in frock in design process, it is big to be suitable for the test temperature scope, satisfies the test method requirement, the authenticity of warranty test and reliability.
Description of drawings
Fig. 1 is a shoulder fixture combined serial sample clamping structural drawing
Fig. 2 is that the big pull header structure figure of upper shoulder and A-A are to cut-open view
Fig. 3 is that upper shoulder clamp structure figure and B-B are to cut-open view
Fig. 4 is that shoulder type series connection header structure figure and C-C are to cut-open view
Fig. 5 is a shoulder type bar sample
Embodiment
Below with reference to drawings and Examples the present invention is further described:
Shown in accompanying drawing 1～5, this kind improves the anti shoulder fixture of duration running efficient, comprise two big pull heads 2 and two shoulder fixtures 3, wherein, one end external thread structure of big pull head 2 is connected with testing machine pull bar 1, its other end is connected with shoulder fixture 3, and the other end of shoulder fixture 3 is connected with an end of bar sample 5, the lower end of big pull head 2 and shoulder fixture 3 is a cylinder, it is characterized in that: at big pull head 2 and cylinder middle part, shoulder fixture 3 lower end, have the through hole 6 of a rectangular build with axial vertical direction, have the slotted hole 7 of a UNICOM bottom surface and rectangular build through hole 6 in the lower end of big pull head 2 rectangular build through holes 6, the width D of the slotted hole 7 on the big pull head 2 is corresponding with the diameter of shoulder fixture 3 upper links, the width H of the slotted hole 7 on the shoulder fixture 3 is then corresponding with the diameter of the bar of bar sample 5, the rectangular build through hole 6 on big pull head 2 and the shoulder fixture 3 and the place that is communicated with of slotted hole 7, downward through hole 9 of vertical direction processing vertically.Through hole 9 on the big pull head 2 and rectangular build through hole 6 be communicated with the place, vertical direction is processed recessed, the circular arc that is used to place shoulder fixture 3 and bar sample 5 connectors global 8 vertically.
In order to carry out the test of two bar samples 5 simultaneously, the anti shoulder fixture that this kind improves duration running efficient has also designed a columniform series connection joint 4, the similar of its structure and big pull head 2 and shoulder fixture 3,
Have in the middle, the through hole 6 of a rectangular build with axial vertical direction, have the slotted hole 7 of a upper and lower end face of UNICOM and rectangular build through hole 6 at the upper and lower end of through hole 6, the diameter of the width L of slotted hole 7 and the bar of bar sample 5 is corresponding, the diameter of shoulder fixture 3 upper links is corresponding, is communicated with place, downward through hole 9 of vertical direction processing vertically at rectangular build through hole 6 and slotted hole 7.
When carrying out stress-rupture tester, at first will go up the internal thread that screws into lower link 1 on the testing machine of the big pull head 2 of lower shoulder and confine connection, clamping upper shoulder anchor clamps 3, shoulder type bar sample 5, the series connection of shoulder type joint 4, shoulder type bar sample 5 and lower shoulder anchor clamps 3 successively from top to bottom then, adjust testing machine clearance between tiebars up and down at last, after making that the sample clamping is finished, very close to each other between anchor clamps.Be the stayed mast of upper shoulder anchor clamps 3 by the big pull head 2 of upper shoulder rectangular build through hole 6 and the slotted hole 7 of bottom rectangle gap shape after be sandwiched in the axial location through hole 9 of upper shoulder pull head 2, and the bulge loop ball contact end face of the circular platform type connector of upper shoulder anchor clamps 3 is docked with global 8 on the matrix circular arc of the big pull head 2 of upper shoulder, and upper shoulder anchor clamps 3 just hang on the big pull head 2 of upper shoulder;
By above-mentioned same structure, the upper/lower terminal of the right cylinder working portion of shoulder type bar sample 5 is respectively installed in upper shoulder anchor clamps 3, series connection joint 4 and the lower shoulder anchor clamps 3, adjust testing machine clearance between tiebars up and down, and tension testing machine stayed mast, the gap between anchor clamps eliminated.
The big pull head 2 of upper and lower shoulder, the axial location circular hole 9 on shoulder fixture 3 and the shoulder type series connection joint 4 and guarantee the concentricity of institute's clamping sample up and down.
The present invention has simple to operate, and clamping is efficient and convenient, guarantees concentricity, has prevented dropout, oxidation adhesion phenomenon and anchor clamps between sample and anchor clamps and adhesion and the dropout between the testing machine pull bar; Improved test efficiency, the test that testing machine can carry out single sample can be carried out the series connection test of two samples again; Reduced experimentation cost, better economic benefit is applicable to the permanent strength testing machine of the different model of different tests machine manufacturer production.
Claims (2)
1. anti shoulder fixture that improves duration running efficient, comprise big pull head (2) and shoulder fixture (3), wherein, one end external thread structure of big pull head (2) is connected with testing machine pull bar (1), its other end is connected with shoulder fixture (3), and the other end of shoulder fixture (3) is connected with an end of bar sample (5), the lower end of big pull head (2) and shoulder fixture (3) is a cylinder, it is characterized in that: at big pull head (2) and shoulder fixture (3) lower end cylinder middle part, have the through hole (6) of a rectangular build with axial vertical direction, have the slotted hole (7) of a UNICOM bottom surface and rectangular build through hole (6) in the lower end of the big rectangular build through hole of pull head (2) (6), the width D of the slotted hole (7) on the big pull head (2) is corresponding with the diameter of shoulder fixture (3) upper links, the width H of the slotted hole (7) on the shoulder fixture (3) is then corresponding with the diameter of the bar of bar sample (5), the rectangular build through hole (6) on big pull head (2) and the shoulder fixture (3) and the place that is communicated with of slotted hole (7), the downward through hole (9) of vertical direction processing vertically;
Through hole (9) on the big pull head (2) and rectangular build through hole (6) be communicated with the place, vertical direction is processed global an of circular arc (8) recessed, that be used to place shoulder fixture (3) and bar sample (5) connector vertically.
2. anti shoulder fixture that improves duration running efficient, it is characterized in that: these anchor clamps are columniform series connection joints (4), have in the middle, the through hole (6) of a rectangular build with axial vertical direction, have the slotted hole (7) of a upper and lower end face of UNICOM and rectangular build through hole (6) at the upper and lower end of rectangular build through hole (6), the diameter of the bar of the width L of slotted hole (7) and bar sample (5) is corresponding, is communicated with place, the downward through hole (9) of vertical direction processing vertically at rectangular build through hole (6) and slotted hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910250638XA CN101706391B (en) | 2009-12-11 | 2009-12-11 | Anti-adhesive shoulder fixture for improving efficiency of endurance test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910250638XA CN101706391B (en) | 2009-12-11 | 2009-12-11 | Anti-adhesive shoulder fixture for improving efficiency of endurance test |
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| Publication Number | Publication Date |
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| CN101706391A CN101706391A (en) | 2010-05-12 |
| CN101706391B true CN101706391B (en) | 2011-08-17 |
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| CN102565115B (en) * | 2011-11-04 | 2014-04-02 | 西安航空动力股份有限公司 | Fixture for high-temperature alloy durability test and anti-oxidation bonding method |
| CN102735535B (en) * | 2012-06-12 | 2014-08-06 | 沈阳盛远检测技术有限公司 | Serial force transmission mechanism used for high-temperature persistence and creep resistance testing machine |
| CN103048190A (en) * | 2012-12-14 | 2013-04-17 | 天津钢铁集团有限公司 | Tensile test fixture for tensile testing machine |
| CN104198279B (en) * | 2014-09-16 | 2016-08-24 | 永兴特种不锈钢股份有限公司 | Standard specimen union joint is used in a kind of stretching |
| CN104614233B (en) * | 2015-01-21 | 2018-02-13 | 浙江工业大学 | High-temerature creep testing machine quick-action clamp device |
| CN105403451A (en) * | 2015-12-10 | 2016-03-16 | 成都发动机（集团）有限公司 | Fixture for high-temperature endurance test of sample |
| CN105527155B (en) * | 2015-12-24 | 2018-09-04 | 燕山大学 | A kind of high/low temperature fatigue test clamper suitable for pole fatigue testing specimen |
| CN108956267B (en) * | 2017-05-27 | 2021-10-22 | 平高集团有限公司 | Insulating pull rod tensile test is with experimental joint and experimental frock |
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| CN107192610B (en) * | 2017-06-30 | 2023-08-25 | 西南交通大学 | Clamp of tensile testing machine |
| CN109238896A (en) * | 2018-07-20 | 2019-01-18 | 苏州热工研究院有限公司 | Based on the concatenated stress corrosion high throughput evaluation method of multispecimen |
| CN110823682A (en) * | 2019-11-01 | 2020-02-21 | 湘潭大学 | Clamp for ultrahigh-temperature creep test |
| CN112525722A (en) * | 2020-11-05 | 2021-03-19 | 中国航发北京航空材料研究院 | Preparation method of silicon carbide ceramic clamp for metal creep test |
| CN112798432B (en) * | 2020-12-30 | 2022-05-13 | 中航试金石检测科技(大厂)有限公司 | Thin-wall pipe full-pipe test tool clamp and high-temperature creep endurance test equipment |
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| GB958848A (en) * | 1962-03-27 | 1964-05-27 | Wiggin & Co Ltd Henry | Improvements relating to creep-testing methods and apparatus |
| FR2662801A1 (en) * | 1990-06-01 | 1991-12-06 | Renault | Device for tension/compression testing of a sample |
| FR2732110A1 (en) * | 1995-03-22 | 1996-09-27 | Commissariat Energie Atomique | Testing rapidly heated specimen bars |
| CN2750311Y (en) * | 2004-09-17 | 2006-01-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Hanging type clamp for high temperature endurance test |
| CN201215537Y (en) * | 2008-07-01 | 2009-04-01 | 中国核动力研究设计院 | Special clamp for metal material tensile test after radiation |
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2009
- 2009-12-11 CN CN200910250638XA patent/CN101706391B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB958848A (en) * | 1962-03-27 | 1964-05-27 | Wiggin & Co Ltd Henry | Improvements relating to creep-testing methods and apparatus |
| FR2662801A1 (en) * | 1990-06-01 | 1991-12-06 | Renault | Device for tension/compression testing of a sample |
| FR2732110A1 (en) * | 1995-03-22 | 1996-09-27 | Commissariat Energie Atomique | Testing rapidly heated specimen bars |
| CN2750311Y (en) * | 2004-09-17 | 2006-01-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Hanging type clamp for high temperature endurance test |
| CN201215537Y (en) * | 2008-07-01 | 2009-04-01 | 中国核动力研究设计院 | Special clamp for metal material tensile test after radiation |
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| CN101706391A (en) | 2010-05-12 |
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