CN105527157B - A kind of split type fixture of quick despatch for fatigue test - Google Patents
A kind of split type fixture of quick despatch for fatigue test Download PDFInfo
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- CN105527157B CN105527157B CN201510990241.XA CN201510990241A CN105527157B CN 105527157 B CN105527157 B CN 105527157B CN 201510990241 A CN201510990241 A CN 201510990241A CN 105527157 B CN105527157 B CN 105527157B
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- test
- support plate
- lower clamp
- split type
- fatigue
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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
Abstract
The present invention relates to a kind of split type fixture of the quick despatch for fatigue test, for testing the experiment of material during tensile fatigue life, belong to material properties test field.In order to improve parts reliability, strengthen the security of plant equipment, need to carry out fatigue life test to parts or material in advance.During actual tests, because test specimen processing and clamping have error, additional load may be produced during experiment, causes the actual load of bearing of test specimen inconsistent with design load, so as to influence test accuracy.The present invention is in order to overcome above mentioned problem, there is provided one kind is used for fatigue Life test fixture, and this fixture uses split-type design, possesses centering adaptivity, can effectively solve error of centralization during clamping；And when changing test specimen, without clamper for disassembling body, test specimen clamping is quick and accuracy of alignment is consistent, the workload of centering detection can be reduced, accelerates experiment progress.
Description
Technical field
It is tired for testing material during tensile the present invention relates to a kind of split type fixture of the quick despatch for fatigue test
The experiment in labor life-span, belong to material properties test field.
Background technology
In modern machinery and equipment, the main reason for fatigue fracture is machine components and engineering component damage inactivation.Therefore,
In order to improve parts reliability, strengthen the security of plant equipment, need to carry out fatigue life test to parts or material in advance.
With the development of Metal Material Fatigue experimental technique, formd complete set both at home and abroad is directed to tensile fatigue
The test requirement specification of experiment.When carrying out fatigue test due to metal material, loading force is larger, is accurate Control experiment load,
Test accuracy is improved, associated specifications there are strict requirements to the alignment degree and axiality of test specimen clamping.But in actual tests
During, because test specimen processing and clamping have error, additional load may be produced during experiment, causes test specimen actual
It is inconsistent with design load to bear load, so as to influence test accuracy.At present, fatigue test clamper is mostly one-piece design,
It is connected in by screw thread or pressing plate on fatigue tester, when test specimen has clamping error, adaptive equalization can not be carried out, no
The error of centralization caused by artificial clamping can be eliminated.Meanwhile using screw thread it is affixed when, experiment dismounting every time all needs to re-start pair
Middle detection, it is time-consuming longer, and clamping precision and uniformity are poor, directly limit experiment progress, and influence test accuracy.
The content of the invention
The technical problems to be solved by the invention are：In order to overcome above mentioned problem, there is provided one kind is used for fatigue Life
Test fixture, this fixture use split-type design, possess centering adaptivity, can effectively solve error of centralization during clamping；And
When changing test specimen, without clamper for disassembling body, test specimen clamping is quick and accuracy of alignment is consistent, can reduce the workload of centering detection,
Accelerate experiment progress.
The technical scheme is that：For achieving the above object, the present invention provides a kind of for the fast of fatigue test
Quick-mounting unloads split type fixture, and the fixture includes upper fixture component and lower clamp component, wherein
The upper fixture component includes upper fixture body, lower clamp body, bearing pin, left pad, right pad, left support plate, right branch
Board, back-up ring and the collar, upper fixture body have a plug tenon with holes, and lower clamp body is with tongue-and-groove and on cell wall with hole, bearing pin
It is attached through the hole of upper fixture body and lower clamp body；Lower clamp body lower end has columnar projections, on the downside of the columnar projections
The axial hole is inserted in mounting groove with axial hole, radial hole and back-up ring, one end of fatigue sample, and by by the left branch
Board and left pad, right support plate and right pad insert the both sides of the radial hole so as to fixed respectively, and the collar is on the upside of back-up ring
Prevent the left support plate, left pad, right support plate and right pad from skidding off；The lower clamp component is in the upper fixture component
On the basis of, in addition to spring, for pushing the collar to back-up ring.
There is screw in the lower end of lower clamp body, some guide rods are threadedly coupled around the columnar projections and with screw,
There is the through hole that can be inserted into the guide rod on the collar.
The crossbeam connection of the upper fixture component and fatigue life test machine, the lower clamp component and fatigue life test
The base connection of 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 be radially
Slided in hole.
Left and right two pieces of support plates have part taper hole in inner side, are combined and limited so as to the end with fatigue sample
Position and centering.
The collar controls its moving range by back-up ring and guide rod.
The upper fixture body and lower clamp body coordinate with bearing pin for gap, and can be rotated around bearing pin, in vertical axis direction
Upper shape is at a certain angle, and the range error and angle occurred to make up metal specimen in processing, installation and test process is missed
Difference, avoid the extra bending load being likely to occur during fatigue test.
The present invention utilizes split type clamp body and drawing and pulling type support plate, realizes the quick despatch of fatigue sample, avoid due to
Processing, clamping error cause to produce additional load during experiment, and the present apparatus is simple in construction, and clamping and removal efficiency are higher,
Being widely used property, and have the advantages that：
(1) split-type structural design fixture is used, upper and lower clamp body is connected using bearing pin, can rotated within the specific limits,
Possess error of centralization adaptivity, can the caused error of centralization in automotive resistance clamping process, improve test accuracy；
(2) lateral drawing and pulling type structure support plate is used, slidably supported plate can complete test specimen replacing, without clamper for disassembling master
Body, in the absence of repeated clamping error, convenient quickly and precision is higher；
(3) support plate is laterally limited using the collar, avoids support plate from being separated during fatigue test, covered
Ring slides up and down " limitation " and " loosening " that can be achieved to support plate, convenient quickly.
Brief description of the drawings
Fig. 1 is the overall structure stereogram of fatigue test clamper of the present invention.
Fig. 2 is the overall structure front view of fatigue test clamper of the present invention.
Fig. 3 is the overall structure 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 half sectional view.
Fig. 6 is fatigue test clamper of the present invention and fatigue tester assembling schematic diagram.
Upper fixture body 1, lower clamp body 2, bearing pin 3, left pad 4A, right pad 4B, left support plate 5A, right support plate 5B, lead
Bar 6, back-up ring 7, the collar 8, upper fixture component 9, fatigue sample 10, lower clamp component 11, fatigue tester 12
Embodiment
The mode of operation for being used for fatigue Life test fixture to the present invention with reference to accompanying drawing is described further：
The first step：Upper fixture body 1 and lower clamp body 2 are connected using bearing pin 3；Guide rod 6 is screwed in the spiral shell of the bottom of lower clamp body 2
In pit, guide rod installation is completed；The collar 8 is loaded into the bottom of lower clamp body 2；Back-up ring 7 is loaded to the groove of the bottom of lower clamp body 2；
Left pad 4A is pasted onto on left support plate 5A using glue, right pad 4B is pasted onto on right support plate 5B；The collar 8 is promoted,
Expose the radial hole of the bottom of lower clamp body 8, left and right pad is inserted into radial hole from both sides.Complete the installation of clamp body component.
Second step：Upper and lower clamp body component is mounted respectively on the crossbeam and base of fatigue tester and locked.
3rd step：On lower clamp component, the collar 8 is pushed open, support plate 5A and 5B are taken out from radial hole；By fatigue sample end
Portion is put into the stage mounting hole of fixture；Support plate 5A and 5B are inserted, plate closing is supported, blocks fatigue sample end；Slip collar
8, enclosed radical hole, complete test specimen lower end clamping.
4th step：With reference to the 3rd step, the collar 8 of upper fixture component is slided, takes out support plate；Decline fatigue test machine vibration
Platform, upper fixture component decrease, until fatigue sample upper end enters the bottom mounting apertures of fixture, insertion support plate 5A and 5B
And close；Slip collar 8, enclosed radical hole, realize fatigue sample upper end clamping.
5th step：The shake table of fatigue tester is raised, until Computer display reaches defined pretightning force, then fatigue examination
Part realizes pretension, completes overall clamping.
Present invention specific implementation application approach is a lot, these are only the preferred embodiment of the present invention, it is noted that any
Using the design of split type clamp body, support plate, the content moved using collar limitation support plate are mounted laterally, is led for this technology
It is any to make some improvement under the premise without departing from the principles of the invention for the technical staff in domain, these improvement
It should be regarded as protection scope of the present invention.
Claims (7)
- A kind of 1. split type fixture of quick despatch for fatigue test, it is characterised in that：The fixture includes upper fixture component (9) With lower clamp component (11), whereinThe upper fixture component (9) includes upper fixture 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 fixture body (1) have plug tenon with holes, under Clamp body (2) is carried out with tongue-and-groove and with hole, bearing pin (3) on cell wall through the hole of upper fixture body (1) and lower clamp body (2) Connection；Lower clamp body (2) lower end has columnar projections, has axial hole, radial hole and back-up ring (7) on the downside of the columnar projections Mounting groove, one end of fatigue sample (10) inserts the axial hole, and by by the left support plate (5A) and left pad (4A), Right support plate (5B) and right pad (4B) insert the both sides of the radial hole so as to fixed respectively, and the collar (8) is on the upside of back-up ring (7) Prevent the left support plate (5A), left pad (4A), right support plate (5B) and right pad (4B) from skidding off；The lower clamp component (11) is on the basis of the upper fixture component (9), in addition to spring, for the collar (8) to be pushed away To back-up ring (7).
- 2. split type fixture according to claim 1, it is characterised in that：There is screw in the lower end of lower clamp body (2), if Dry guide rod (6) is threadedly coupled around the columnar projections and with screw, has on the collar (8) and can be inserted into the guide rod (6) Through hole.
- 3. split type fixture according to claim 1 or 2, it is characterised in that：The upper fixture component (9) and fatigue life The crossbeam connection of testing machine (12), the lower clamp component (11) are connected with the base of fatigue life test machine (12).
- 4. split type fixture according to claim 1 or 2, it is characterised in that：Left pad (4A) is fitted in left support plate On (5A), right pad (4B) is fitted on right support plate (5B), and left and right two pieces of support plates (5A, 5B) can be slided in radial hole.
- 5. split type fixture according to claim 4, it is characterised in that：Including left and right two pieces of support plates (5A, 5B) There is part taper hole side, so as to be combined with the end of fatigue sample (10) and spacing and centering.
- 6. split type fixture according to claim 2, it is characterised in that：The collar (8) is by back-up ring (7) and guide rod (6) Control its moving range.
- 7. split type fixture according to claim 1 or 2, it is characterised in that：The upper fixture body (1) and lower clamp body (2) coordinate with bearing pin (3) for gap, and can be rotated around bearing pin (3), certain angle is upwardly formed in vertical axis side, with more Metal specimen range error and angular error for occurring in processing, installation and test process are mended, during avoiding fatigue test The extra bending load being likely to occur.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105527157A CN105527157A (en) | 2016-04-27 |
| CN105527157B true CN105527157B (en) | 2018-03-13 |
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| CN110849739B (en) * | 2019-09-04 | 2020-10-27 | 北京理工大学 | Mixed type fatigue test method |
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| 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 |
| CN114813327B (en) * | 2022-05-23 | 2023-04-07 | 西南交通大学 | Tenon structure fretting fatigue test system and fretting fatigue crack detection method |
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