CN105527157A - Rapid-assembling and dissembling split clamp used for fatigue test - Google Patents
Rapid-assembling and dissembling split clamp used for fatigue test Download PDFInfo
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- CN105527157A CN105527157A CN201510990241.XA CN201510990241A CN105527157A CN 105527157 A CN105527157 A CN 105527157A CN 201510990241 A CN201510990241 A CN 201510990241A CN 105527157 A CN105527157 A CN 105527157A
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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
- G01N3/02—Details
- G01N3/04—Chucks
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- Life Sciences & Earth Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a rapid-assembling and dissembling split clamp used for fatigue test, and belongs to the field of material performance test. The split clamp is used for testing the tensile fatigue life of a metal material. Fatigue life test of a component or material is needed to improve the reliability of a part and enhance the safety of a machine device. In the practical test process, inconsistence of the practical bearing load and the design load of the test piece, caused by errors existing in the test piece processing and clamping process and extra load possibly generated in the test process, has influences on the test precision. The test piece fatigue life test clamp is provided to solve the above problem, adopts split design, has centering self-adaptability, and can effectively solve the centering error in the clamping process; and when test piece is replaced, dismounting of a clamp body is not needed, the test piece clamping is fast, the centering precision is consistent, the workload of centering detection is reduced, and the test process is accelerated.
Description
Technical field
The present invention relates to the split type fixture of a kind of quick despatch for torture test, for testing the test of material during tensile fatigue lifetime, belonging to material properties test field.
Background technology
In modern machinery and equipment, fatigue break is the main cause of mechanical component and engineering component damage inactivation.Therefore, in order to improve parts reliability, strengthening the security of plant equipment, fatigue life test need be carried out to parts or material in advance.
Along with the development of Metal Material Fatigue experimental technique, define the test requirement specification for tensile fatigue test of complete set both at home and abroad.Due to metal material carry out torture test time, loading force is comparatively large, is accurate Control experiment load, and improve test accuracy, associated specifications has strict requirement to the alignment degree of test specimen clamping and right alignment.But in the process of actual tests, because test specimen processing and clamping exist error, additional load may be produced in process of the test, cause the actual bearing load of test specimen and design load inconsistent, thus affect test accuracy.At present, fatigue test clamper is mostly one-piece design, is connected on fatigue tester by screw thread or pressing plate, when test specimen exists clamping error, cannot carry out adaptive equalization, the error of centralization produced when can not eliminate artificial clamping.Meanwhile, when adopting screw thread affixed, each test dismounting all needs to re-start midline detect, consuming time longer, and clamping precision and consistance poor, directly limit test progress, and affect test accuracy.
Summary of the invention
Technical matters to be solved by this invention is: in order to overcome the problems referred to above, and provide a kind of for fatigue Life test fixture, this fixture adopts split-type design, possesses centering adaptivity, effectively can solve error of centralization during clamping; And when changing test specimen, without the need to clamper for disassembling body, test specimen clamping is quick and accuracy of alignment is consistent, can reduce the workload of midline detect, accelerates test progress.
Technical scheme of the present invention is: for achieving the above object, and the invention provides the split type fixture of a kind of quick despatch for torture test, this fixture comprises clamp assembly and lower clamp assembly, wherein
Described upper clamp assembly comprises clamp body, lower clamp body, bearing pin, left pad, right pad, left support plate, right support plate, back-up ring and the collar, upper clamp body has plug tenon with holes, lower clamp body has tongue-and-groove and have hole on cell wall, and bearing pin is connected with the hole of lower clamp body through upper clamp body; Lower clamp body lower end has columnar projections, there is the mounting groove of axial hole, radial hole and back-up ring on the downside of this columnar projections, this axial hole is inserted in one end of fatigue sample, and fixing by the both sides of described left support plate and left pad, right support plate and right pad being inserted respectively described radial hole, the collar prevents described left support plate, left pad, right support plate and right pad from skidding off on the upside of back-up ring; On the basis of described lower clamp assembly clamp assembly on described, also comprise spring, for pushing the collar to back-up ring.
Also have screw in the lower end of lower clamp body, some guide rods are around described columnar projections and be threaded with screw, and the collar has the through hole that can insert described guide rod.
Described upper clamp assembly is connected with the crossbeam of fatigue life test machine, and described lower clamp assembly is connected with the base of fatigue life test machine.
Left pad is fitted on left support plate, and right pad is fitted on right support plate, and left and right two pieces of support plates can slide in radial hole.
Described left and right two pieces of support plates have part taper hole in inner side, thus can be combined and spacing and centering with the end of fatigue sample.
The described collar controls its moving range by back-up ring and guide rod.
Described upper clamp body and lower clamp body and bearing pin are clearance fit, and can rotate around bearing pin, on vertical axis direction, shape is at a certain angle, to make up metal specimen in the distance error processed, install and occur in test process and angular error, avoid the extra bending load that may occur in torture test process.
The present invention utilizes split type clamp body and drawing and pulling type support plate, realize the quick despatch of fatigue sample, avoid because processing, clamping error cause producing additional load in process of the test, this apparatus structure is simple, clamping and removal efficiency higher, being widely used property, and there is following beneficial effect:
(1) adopt split-type structural design fixture, upper and lower clamp body uses pinned connection, can rotate within the specific limits, possess error of centralization adaptivity, and the error of centralization that can produce in automotive resistance clamping process, improves test accuracy;
(2) adopt side direction drawing and pulling type structure support plate, slidably supported plate can complete test specimen and change, and without the need to clamper for disassembling main body, there is not repeated clamping error, convenient fast and precision is higher;
(3) adopt the collar to carry out horizontal restriction to support plate, avoid support plate to occur being separated in torture test process, sliding up and down " restriction " and " loosening " that can realize support plate of the collar, fast convenient.
Accompanying drawing explanation
Fig. 1 is the one-piece construction stereographic map of fatigue test clamper of the present invention.
Fig. 2 is the one-piece construction front view of fatigue test clamper of the present invention.
Fig. 3 is the one-piece construction explosive view of fatigue test clamper of the present invention.
Fig. 4 is fatigue test clamper of the present invention and test specimen assembly front view.
Fig. 5 is fatigue test clamper of the present invention and test specimen assembly semisectional view.
Fig. 6 is that schematic diagram assembled by fatigue test clamper of the present invention and fatigue tester.
Upper clamp body 1, lower clamp body 2, bearing pin 3, left pad 4A, right pad 4B, left support plate 5A, right support plate 5B, guide rod 6, back-up ring 7, the collar 8, upper clamp assembly 9, fatigue sample 10, lower clamp assembly 11, fatigue tester 12
Embodiment
By reference to the accompanying drawings the present invention is described further for the mode of operation of fatigue Life test fixture:
The first step: use bearing pin 3 to connect upper clamp body 1 and lower clamp body 2; Guide rod 6 is screwed in the threaded hole of lower clamp body 2 bottom, complete guide rod and install; The collar 8 is loaded lower clamp body 2 bottom; Back-up ring 7 is loaded the groove of lower clamp body 2 bottom; Use glue to be pasted onto on left support plate 5A by left pad 4A, right pad 4B is pasted onto on right support plate 5B; Promote the collar 8, expose the radial hole of lower clamp body 8 bottom, left and right pad is inserted radial hole from both sides.Complete the installation of clamp body assembly.
Second step: upper and lower clamp body assembly to be mounted to respectively on the crossbeam of fatigue tester and base and to lock.
3rd step: on lower clamp assembly, pushes the collar 8 open, takes out support plate 5A and 5B from radial hole; Fatigue sample end is put into the stage mounting hole of fixture; Insert support plate 5A and 5B, support plate closes, and blocks fatigue sample end; Slip collar 8, enclosed radical hole, completes test specimen lower end clamping.
4th step: with reference to the 3rd step, the collar 8 of clamp assembly in slip, takes out support plate; Decline torture test making machine vibration table, upper clamp assembly decreases, until fatigue sample upper end enters the bottom mounting apertures of fixture, inserts support plate 5A and 5B and closes; Slip collar 8, enclosed radical hole, realizes fatigue sample upper end clamping.
5th step: the shaking table raising fatigue tester, until Computer display reaches the pretightning force of regulation, then fatigue sample realizes pretension, completes overall clamping.
It is a lot of that the present invention specifically practices approach; these are only the preferred embodiment of the present invention; should be understood that; the split type clamp body design of any employing, side direction are installed support plate, are used the content of collar restriction support plate movement; for those skilled in the art; under the premise without departing from the principles of the invention any, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (7)
1. for the split type fixture of quick despatch of torture test, it is characterized in that: this fixture comprises clamp assembly (9) and lower clamp assembly (11), wherein
Described upper clamp assembly (9) comprises clamp body (1), lower clamp body (2), bearing pin (3), left pad (4A), right pad (4B), left support plate (5A), right support plate (5B), back-up ring (7) and the collar (8), upper clamp body (1) has plug tenon with holes, lower clamp body (2) has tongue-and-groove and have hole on cell wall, and bearing pin (3) is connected through the hole of upper clamp body (1) with lower clamp body (2); Lower clamp body (2) lower end has columnar projections, there is the mounting groove of axial hole, radial hole and back-up ring (7) on the downside of this columnar projections, this axial hole is inserted in one end of fatigue sample (10), and fixed by the both sides of described left support plate (5A) and left pad (4A), right support plate (5B) and right pad (4B) being inserted respectively described radial hole, the collar (8) prevents described left support plate (5A), left pad (4A), right support plate (5B) and right pad (4B) from skidding off on the upside of back-up ring (7);
On the basis of described lower clamp assembly (11) clamp assembly (9) on described, also comprise spring, for pushing the collar (8) to back-up ring (7).
2. split type fixture according to claim 1, it is characterized in that: also have screw in the lower end of lower clamp body (2), some guide rods (6) are around described columnar projections and be threaded with screw, and the collar (8) has the through hole that can insert described guide rod (6).
3. split type fixture according to claim 1 and 2, it is characterized in that: described upper clamp assembly (9) is connected with the crossbeam of fatigue life test machine (12), described lower clamp assembly (11) is connected with the base of fatigue life test machine (12).
4. split type fixture according to claim 1 and 2, it is characterized in that: left pad (4A) is fitted on left support plate (5A), right pad (4B) is fitted on right support plate (5B), left and right two pieces of support plates (5A, 5B) can be slided in radial hole.
5. split type fixture according to claim 4, is characterized in that: described left and right two pieces of support plates (5A, 5B) have part taper hole in inner side, thus can be combined and spacing and centering with the end of fatigue sample (10).
6. split type fixture according to claim 1 and 2, is characterized in that: the described collar (8) controls its moving range by back-up ring (7) and guide rod (6).
7. split type fixture according to claim 1 and 2, it is characterized in that: described upper clamp body (1) and lower clamp body (2) are clearance fit with bearing pin (3), and can rotate around bearing pin (3), on vertical axis direction, shape is at a certain angle, to make up metal specimen in the distance error processed, install and occur in test process and angular error, avoid the extra bending load that may occur in torture test process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510990241.XA CN105527157B (en) | 2015-12-24 | 2015-12-24 | A kind of split type fixture of quick despatch for fatigue test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510990241.XA CN105527157B (en) | 2015-12-24 | 2015-12-24 | A kind of split type fixture of quick despatch for fatigue test |
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| Publication Number | Publication Date |
|---|---|
| CN105527157A true CN105527157A (en) | 2016-04-27 |
| CN105527157B CN105527157B (en) | 2018-03-13 |
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| CN201510990241.XA Active CN105527157B (en) | 2015-12-24 | 2015-12-24 | A kind of split type fixture of quick despatch for fatigue test |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122255A (en) * | 2016-08-22 | 2016-11-16 | 苏州市顺仪五金有限公司 | A kind of straight rotating shaft |
| CN106769556A (en) * | 2017-03-17 | 2017-05-31 | 西南交通大学 | Reliability test workbench and system that test metal coupons vibration is coupled with fatigue |
| CN110455653A (en) * | 2019-07-24 | 2019-11-15 | 上海唯万密封科技有限公司 | A kind of strength test technique of skeleton structure nonmetallic materials |
| CN110849739A (en) * | 2019-09-04 | 2020-02-28 | 北京理工大学 | Mixed type fatigue test method |
| CN111141600A (en) * | 2019-12-31 | 2020-05-12 | 宁波大学 | Compact pipeline test piece fatigue test system |
| CN111521466A (en) * | 2020-05-28 | 2020-08-11 | 天津大学 | Opening structure corner fatigue sample and special fixture thereof |
| CN112179754A (en) * | 2020-09-22 | 2021-01-05 | 中国特种飞行器研究所 | Loading device for composite material out-of-plane fatigue test |
| CN114813327A (en) * | 2022-05-23 | 2022-07-29 | 西南交通大学 | Tenon structure fretting fatigue test system and fretting fatigue crack detection method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122255A (en) * | 2016-08-22 | 2016-11-16 | 苏州市顺仪五金有限公司 | A kind of straight rotating shaft |
| CN106769556A (en) * | 2017-03-17 | 2017-05-31 | 西南交通大学 | Reliability test workbench and system that test metal coupons vibration is coupled with fatigue |
| CN106769556B (en) * | 2017-03-17 | 2023-09-29 | 西南交通大学 | Reliability test workbench and system for testing vibration and fatigue coupling of metal test block |
| CN110455653A (en) * | 2019-07-24 | 2019-11-15 | 上海唯万密封科技有限公司 | A kind of strength test technique of skeleton structure nonmetallic materials |
| CN110849739A (en) * | 2019-09-04 | 2020-02-28 | 北京理工大学 | Mixed type fatigue test method |
| CN111141600A (en) * | 2019-12-31 | 2020-05-12 | 宁波大学 | Compact pipeline test piece fatigue test system |
| CN111521466A (en) * | 2020-05-28 | 2020-08-11 | 天津大学 | Opening structure corner fatigue sample and special fixture thereof |
| CN112179754A (en) * | 2020-09-22 | 2021-01-05 | 中国特种飞行器研究所 | Loading device for composite material out-of-plane fatigue test |
| CN114813327A (en) * | 2022-05-23 | 2022-07-29 | 西南交通大学 | Tenon structure fretting fatigue test system and fretting fatigue crack detection method |
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| CN105527157B (en) | 2018-03-13 |
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