CN106769423A - One kind is applied to plate tensile sample high-temperature and durable creeping test fixture - Google Patents
One kind is applied to plate tensile sample high-temperature and durable creeping test fixture Download PDFInfo
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- CN106769423A CN106769423A CN201611051894.2A CN201611051894A CN106769423A CN 106769423 A CN106769423 A CN 106769423A CN 201611051894 A CN201611051894 A CN 201611051894A CN 106769423 A CN106769423 A CN 106769423A
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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
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Abstract
The invention belongs to mechanics performance testing technology, it is related to a kind of suitable for sheet coupon high-temperature and durable creeping test fixture.The fixture includes jig main body and pad component two parts, and jig main body is three-back-shaped cuboid, and inside is cavity, and pad component is divided into two elements, and the longitudinal axis of jig main body, pad component and plate tensile sample is on the same line；During clamping plate tensile sample, blending bolt will be fixed together between the parallel-segment of plate tensile sample is placed in into two elements, then overall to insert in the cavity of jig main body.Sample and fixture are connected by bare terminal end hang in the present invention, overcome the drawbacks such as the sample holder end fracture that pin connect band is come, reduce test failure probability, it is to avoid data are inaccurate and the problems such as the wasting of resources.Structure of the invention is applicable not only to plate tensile sample high-temperature and durable and creep test, applies also for plate tensile sample room temperature, high temperature single shaft stretching, draws the mechanical property tests such as fatigue.
Description
Technical field
The invention belongs to mechanics performance testing technology, it is related to a kind of suitable for sheet coupon high-temperature and durable creeping test clamp
Tool.
Background technology
Lasting and creep is for describing performance during permanent load when metal material tolerates long under the high temperature conditions.In order to
The lasting and croop property of material is obtained, material lasting and creep sample need to be processed into, then using lasting and creep test
Machine is tested.When lasting and creep test is carried out, corresponding fixture need to be equipped with for fixing sample.
Lasting and creep sample common at present is cylinder sample and plate tensile sample, and cylinder sample is mainly used in material and fills
Lasting and creep test when enough, to specimen size no requirement (NR), sample is generally connected with fixture using threaded connection or suspension
Mode；Plate tensile sample is mainly used in that scantling is limited or thin plate lasting and creep test, and sample is generally adopted at present with fixture
The mode (see Fig. 1) connected with pin, i.e.,：In U-shaped fixture 1-1 and plate tensile sample 1-3 bare terminal ends processing concentric circle holes, during experiment
End is accommodated with sample through fixture with the pin 1-2 of diameter using with circular hole, the connection of sample and fixture is realized.Using this kind of company
When the mode of connecing carries out lasting and creep test, following problem is easily produced：(1) when testing, sample holder end circular hole load side pole
Easily it is pulled off；(2) high to connecting the pin intensity and diametric requirements of sample, otherwise pin is easily broken, and the situation is in examination higher
Become apparent at a temperature of testing；(3) pin easily deforms after long-term use, influence experiment axiality and specimen clamping, making property
Can data reliability reduction；(4) when plate tensile sample is relatively thin, space is larger between sample and U-shaped fixture, during experiment axiality compared with
Card is difficult to ensure, so as to be impacted to result of the test；(5) there is minimum requirements to sample holder end size, it is impossible to realize that small size is tried
The test of sample.The presence of these problems, increased the probability of test failure, reduce data reliability, improve experimentation cost,
Particularly with the long-life persistently and creep test, can more cause the serious waste of test period and resource.
The content of the invention
The present invention proposes a kind of high-temperature and durable creeping test fixture suitable for plate tensile sample, and sample is adopted with jig main body
Connected mode is hung with bare terminal end.
Technical solution of the invention is that the fixture includes jig main body and pad component two parts, and jig main body is
Three-back-shaped cuboid, inside is cavity, and cavity short side dimension is more than pad component width, and long edge size is high more than pad component
Degree, is provided with insertion groove between cavity hatch side lower end and the lower end of jig main body, insertion groove is located at jig main body lower end
Center, the width of insertion groove is suitable with plate tensile sample parallel-segment width, and the depth of insertion groove is more than cavity depth
50%, the bottom centre position of cavity is provided with the deep-slotted chip breaker with pad component bottom mating；Pad component is divided into two elements, the
The shape of one element is corresponding with the shape of plate tensile sample bare terminal end, and the second element is corresponding with plate tensile sample transition circle segmental arc
Position at be provided with boss, longitudinal groove, external surface and the plate tensile sample transition circle segmental arc of cell wall are opened in the center of boss
External surface matches, and width and the sample parallel-segment width of groove match, and the depth of groove is plate tensile sample and the first element
Thickness sum, the depth of groove ensures that the longitudinal axis of plate tensile sample is always positioned on the longitudinal axis of jig main body, second yuan
Part bottom is the internal cavity bottom arc groove shape identical cambered surface with jig main body, is opened on the first element and the second element
There are concentric circle holes, the longitudinal axis of jig main body, pad component and plate tensile sample is on the same line；Clamping plate tensile sample
When, the parallel-segment of plate tensile sample is placed in the groove of the boss of the second element and makes the circular hole on plate tensile sample bare terminal end and
Circular hole on two element is aligned, then the first element is buckled on the second element into blending bolt by the first element, plate tensile sample and
Two element is fixed together, and then the overall cavity for inserting jig main body is interior and the second component base is located in deep-slotted chip breaker.
The jig main body is three-back-shaped cuboid, and inside is cavity, and cavity short side dimension is slightly larger than pad component width 1
~2mm, height of the long edge size more than pad component.
The insertion groove is located at the center of jig main body lower end, and the depth of insertion groove exceedes body lumen depth
Half position 2-3mm.
The width of the deep-slotted chip breaker groove face is the 1/3 of internal cavity depth, and radius is consistent with the bottom radius of cushion block element 2.
Minimum thickness scope between the jig main body intracavity bottom deep-slotted chip breaker bottom land and bottom part body is 5~20mm.
The element of the cushion block second is 0.5~4.0mm to the groove depth bounds that plate tensile sample is reserved, and is one with 0.5mm
The pad component of individual interval configuration different size, and ensure that, for any specification pad component, plate tensile sample is in first
The centre position of element and the second element.
The present invention has the advantage that and beneficial effect
(1) the sample holder end for being connected by bare terminal end hang, overcoming pin connect band of sample and fixture
The drawbacks such as fracture, pin fracture, pin deformation, reduce test failure probability, avoid that data are inaccurate and the wasting of resources etc. is asked
Topic.
(2) different size pad component clamping sample is used, the testing requirement of different-thickness plate tensile sample is met, is reduced
Testing cost, improves experiment flexibility ratio.
(3) pad component and plate tensile sample are fixed using bolt, whole connection system can be caused by adjusting nut elasticity
System reaches optimal axiality, it is to avoid plate tensile sample axiality is inaccurate when pin is connected adversely affects to result of the test.
(4) bottom is that the pad component of cambered surface and plate tensile sample are integrally inserted in the deep-slotted chip breaker of fixture inner cavity bottom, is tested
When can arcuately groove bottom regulation pad component position, be easy to whole connection system to reach optimal axiality.
(5) structure of the invention is applicable not only to plate tensile sample high-temperature and durable and creep test, applies also for plate tensile sample
The mechanical property tests such as room temperature, high temperature single shaft stretching, La-drawing fatigue.
Brief description of the drawings
Fig. 1 is existing pin attachment structure schematic diagram.
Fig. 2 is present clip agent structure schematic diagram, wherein, a is plan, and b is stereogram.
Fig. 3 is pad component structural representation of the present invention.
Fig. 4 is present clip main body, pad component and sample assembling structure schematic diagram.
Fig. 5 is the structural representation of whole connection system after the completion of present clip is assembled with sample.
Specific embodiment
Specific implementation case of the invention is explained referring to the drawings.
The fixture includes jig main body and pad component two parts, and jig main body (see Fig. 2) is three-back-shaped cuboid 2-1,
Inside is cavity, and cavity short side 2-3 sizes are more than cushion block width, and 2-2 sizes in side long are more than cushion block highly, under cavity hatch side
Insertion groove 2-4 is provided between end and the lower end of jig main body, insertion groove is located at the center of jig main body lower end, insertion
The width of groove is suitable with plate tensile sample parallel-segment width, and the depth of insertion groove is more than cavity depth 50%, the bottom of cavity
Center is provided with the deep-slotted chip breaker 2-5 with pad component bottom mating；Pad component (see Fig. 3) is divided into two elements, element 3-1
Shape it is corresponding with the shape of plate tensile sample bare terminal end 3-2, element 3-3 is corresponding with plate tensile sample transition circle segmental arc 3-4
Position at be provided with boss 3-5, longitudinal groove 3-6, external surface and the plate tensile sample transition of cell wall are opened in the center of boss 3-5
The external surface of arc section 3-4 matches, and width and the sample parallel-segment 3-7 width of groove 3-6 match, the depth of groove 3-6
It is plate tensile sample and element 3-1 thickness sums, the depth of groove 3-6 ensures that the longitudinal axis of plate tensile sample is always positioned at fixture master
On the longitudinal axis of body, element 3-3 bottoms are the internal cavity bottom deep-slotted chip breaker 2-5 shape identical cambered surfaces with jig main body,
Concentric circle holes are provided with element 3-1 and element 3-3, the longitudinal axis of jig main body, pad component and plate tensile sample is same
On one straight line.
Before experiment, the clamping of pad component and sheet coupon can be completed on operating desk in advance, be specifically shown in Fig. 4.By tabular
The parallel-segment 3-7 of sample be placed in the groove 3-6 of the boss 3-5 of element 3-3 and make circular hole on plate tensile sample bare terminal end 3-2 with
Circular hole on element 3-3 is aligned, then element 3-1 is buckled on element 3-3 into blending bolt 3-8 by element 3-1, plate tensile sample and unit
Part 3-3 is fixed together, and then the overall cavity for inserting jig main body 2 is interior and element 3-3 bottoms is located at the arc of cavity bottom
In shape groove 2-5, that is, the connection of plate tensile sample and jig main body is completed, the structural representation of whole connection system is shown in Fig. 5.
The short side 2-3 sizes of jig main body inner chamber are slightly larger than cushion block element 3-3 1~2mm of width, the purpose is to：(1) it is easy to
Pad component integrally smoothly inserts body lumen with plate tensile sample；(2) can be along the camber line side of intracavity bottom deep-slotted chip breaker 2-5 before testing
To regulation pad component, it is ensured that connection system has optimal axiality.
The depth that insertion groove 2-4 is opened between jig main body lumen openings side lower end and the lower end of jig main body exceedes
Depth of inner cavity half position 2-3mm, the groove is plate tensile sample parallel-segment 3-7 locations after the completion of clamping, and its depth surpasses
Crossing depth of inner cavity half position 2-3mm can ensure that plate tensile sample is on the axis of whole connection system and will not touch groove
Bottom.
The width that jig main body intracavity bottom is used for the deep-slotted chip breaker 2-5 for placing pad component is thick with cushion block element 3-3 bottoms
Degree is consistent, is the 1/3 of depth of inner cavity, the purpose is to：(1) pad component can bear load at the trial, easily be damaged, more
Change frequency high, cushion block element 3-3 bottom thickness sizes are reduced to greatest extent, can effectively reduce experimentation cost；(2) cushion block element 3-
3 bottoms also need to keep certain thickness, it is ensured that have larger contact surface during experiment with deep-slotted chip breaker 2-5, reduce jig main body bottom
Stress, it is to avoid its destruction, minimum thickness scope between deep-slotted chip breaker 2-5 bottom surfaces and jig main body bottom is 5~20mm, it is ensured that
Enough bearing capacities are arranged at jig main body bottom.
In order to adapt to the testing requirement of different-thickness plate tensile sample, the groove depth that cushion block element 3-3 is reserved to plate tensile sample
Degree scope is 0.5~4.0mm, is an interval with 0.5mm, can process 8 kinds of pad components of specification, and ensure for any
Specification pad component, plate tensile sample is in the centre position of element 3-1 and 3-3.During experiment, by changing different size cushion block
Component realizes the test of different-thickness sample, reduces testing cost, improves experiment flexibility ratio.
Jig main body (see Fig. 2) can be using equiax crystal high temperature alloy, directionally solidified superalloy, DS superalloy and single crystal super alloy etc.
Directly casting is formed the high-temperature structural material of tolerable 1000C temperatures above, and certainly, also can select other has more high-temperature resistant energy
The material of power, higher intensity.
Pad component (see Fig. 3) can select and jig main body material identical material, be processed by the method being machined
Form, also can select other have more high-temperature resistant ability, higher intensity material (such as：Refractory ceramics etc.) process.
Embodiment
Sample thickness is 1.5mm in example, and the pad component for choosing dimension carries out experiment.Before experiment, first in behaviour
Make the clamping of completion plate tensile sample and pad component on platform.During clamping sample, nut is too tight without twisting, make element 3-1,3-3 with
Sample holder end 3-2 reaches good contact.Then, pad component and plate tensile sample are integrally inserted into fixture inner cavity bottom
In deep-slotted chip breaker, the connection of fixture and plate tensile sample is completed.
The material limited for size, can suitably reduce plate tensile sample bare terminal end size, if necessary plate tensile sample bare terminal end
Circular hole can not be processed, the clamping and long-time creep test of sample are not influenceed.
Claims (6)
1. it is a kind of to be applied to plate tensile sample high-temperature and durable creeping test fixture, it is characterized in that, the fixture includes jig main body and pad
Block assembly two parts, jig main body is three-back-shaped cuboid, and inside is cavity, and cavity short side dimension is more than pad component width,
Long edge size highly, is provided with insertion groove more than pad component between cavity hatch side lower end and the lower end of jig main body, pass through
Logical groove is located at the center of jig main body lower end, and the width of insertion groove is suitable with plate tensile sample parallel-segment width, insertion
The depth of groove is more than cavity depth 50%, and the bottom centre position of cavity is provided with the deep-slotted chip breaker with pad component bottom mating；
Pad component is divided into two elements, and the shape of the first element (3-1) is corresponding with the shape of plate tensile sample bare terminal end, the second element
(3-3) is provided with boss at the position corresponding with plate tensile sample transition circle segmental arc, and longitudinal groove, groove are opened in the center of boss
The external surface of wall matches with the external surface of plate tensile sample transition circle segmental arc, width and the sample parallel-segment width phase of groove
Match somebody with somebody, the depth of groove is plate tensile sample and the first element (3-1) thickness sum, and the depth of groove ensures the longitudinal axis of plate tensile sample
Line is always positioned on the longitudinal axis of jig main body, and the second element (3-3) bottom is the internal cavity bottom arc with jig main body
Concentric circle holes, jig main body, cushion block are provided with shape groove shape identical cambered surface, the first element (3-1) and the second element (3-3)
The longitudinal axis of component and plate tensile sample is on the same line；During clamping plate tensile sample, the parallel-segment of plate tensile sample is placed in
In the groove of the boss of the second element (3-3) and make on plate tensile sample bare terminal end circular hole and the second element (3-3) on circular hole
Align, then the first element (3-1) is buckled on the second element (3-3) blending bolt by the first element (3-1), plate tensile sample and
Two element (3-3) is fixed together, and then the overall cavity for inserting jig main body is interior and the second element (3-3) bottom is located at arc
In shape groove.
2. plate tensile sample high-temperature and durable creeping test fixture according to claim 1, it is characterised in that the jig main body is back
Font cuboid, inside is cavity, and cavity short side dimension is slightly larger than pad component 1~2mm of width, and long edge size is more than cushion block group
The height of part.
3. plate tensile sample high-temperature and durable creeping test fixture according to claim 1, it is characterised in that the insertion groove is located at
The center of jig main body lower end, the depth of insertion groove exceedes body lumen depth half position 2-3mm.
4. plate tensile sample high-temperature and durable creeping test fixture according to claim 1, it is characterised in that the deep-slotted chip breaker groove face
Width is the 1/3 of internal cavity depth, and radius is consistent with the bottom radius of cushion block element 2.
5. plate tensile sample high-temperature and durable creeping test fixture according to claim 1, it is characterised in that the jig main body inner chamber
Minimum thickness scope between bottom deep-slotted chip breaker bottom land and bottom part body is 5~20mm.
6. plate tensile sample high-temperature and durable creeping test fixture according to claim 1, it is characterised in that the element of the cushion block second
(3-3) is 0.5~4.0mm to the groove depth bounds that plate tensile sample is reserved, and is an interval configuration different size with 0.5mm
Pad component, and ensure that, for any specification pad component, plate tensile sample is in the first element (3-1) and the second element
The centre position of (3-3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611051894.2A CN106769423B (en) | 2016-11-24 | 2016-11-24 | One kind being suitable for plate tensile sample high-temperature and durable creeping test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611051894.2A CN106769423B (en) | 2016-11-24 | 2016-11-24 | One kind being suitable for plate tensile sample high-temperature and durable creeping test fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106769423A true CN106769423A (en) | 2017-05-31 |
| CN106769423B CN106769423B (en) | 2019-05-21 |
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| CN114750088B (en) * | 2022-04-08 | 2024-02-20 | 北航（四川）西部国际创新港科技有限公司 | Thin-wall sample test fixture |
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