CN203869943U - Material test fixture for clamping tiny sample - Google Patents
Material test fixture for clamping tiny sample Download PDFInfo
- Publication number
- CN203869943U CN203869943U CN201420007166.1U CN201420007166U CN203869943U CN 203869943 U CN203869943 U CN 203869943U CN 201420007166 U CN201420007166 U CN 201420007166U CN 203869943 U CN203869943 U CN 203869943U
- Authority
- CN
- China
- Prior art keywords
- fixture block
- fixture
- extensometer
- material test
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a material test fixture for clamping a tiny sample. The material test fixture mainly comprises a main body (1), two wedge-shaped clamping block pairs, a pressurizing cover plate (6), a fastening bolt system and a pressurizing mechanism, wherein the main body (1) is used for being connected onto a tester hydraulic fixture, and the two wedge-shaped clamping block pairs are arranged in the main body (1). The material test fixture can be used for clamping the tiny sample conveniently, and an extensometer can be hung, so that more precise strain results can be obtained. The material test fixture is also applicable to strain control loading tests.
Description
Technical field
The utility model belongs to mechanical clamp, especially material test machine clamp field.
Background technology
When the mechanical property test of material, for various reasons, often run into sample is made to very little situation.For example Nitinol microtubule (external diameter only has 1.5mm left and right), single crystal Cu are (because technical reason cannot obtain large monocrystal, conventionally in millimeter magnitude) and pangolin scale (biological own restriction, the thickness of its sample only has 1mm left and right) etc.For these small samples, it directly cannot be clamped on the hydraulically operated fixture that MTS testing machine carries, allowing to clamping, get on also can be excessive bad by sample holder because of the holding force of hydraulically operated fixture, particularly the fragility biomaterials such as pangolin scale and shell just more easily destroyed.To the solution of these problems, is at present a small-sized mechanical clips of processing mostly, first by sample holder mechanical clips, and then mechanical clips is clamped on the hydraulically operated fixture that MTS carries and is tested.Tiny sample is tested to also can to run into another problem be to load extensometer, one of them reason is, the gauge length of the active section Length Ratio extensometer of sample is short, and extensometer cannot be suspended to sample and get on.Another reason is that the too thin material of sample itself is soft again, and the bayonet socket of extensometer directly causes fatal damage to sample, causes the result of test insincere.So when tiny sample is tested, scarcely use extensometer, be directly converted into strain with relative displacement.But the measuring result error that this method obtains will be very large.Therefore the utility model is intended to construct and a kind ofly facilitates easy-to-usely, and can use the fixture of extensometer test tiny sample.
Utility model content
In view of above-mentioned the deficiencies in the prior art, the purpose of this utility model is that structure is a kind of for clamping the material test fixture of tiny sample.This clamp structure is simple, easy to use, and also can enough extensometer monitor strains to small sample.
The purpose of this utility model is to realize by following means:
For clamping a material test fixture for tiny sample, comprise one for being connected to main body 1 on testing machine hydraulically operated fixture, be arranged on two wedge shape fixture blocks in main body 1 secondary, add cover clamp 6, fastening screw ties and pressing mechanism; Wedge shape fixture block pair has front fixture block secondary 2 and 3 and rear fixture block secondary 4 and 5.Described wedge shape fixture block pair all has " work " word profile, is nested in slidably in the groove 101 that is half " work " font in main body 1.Four bolts that fastening screw ties connect described parts by each fixture block and main body and the respective through hole that adds on cover clamp.The center that adds cover clamp 6 have threaded hole 601, with the screw rod 7 of handle 701, insert that threaded hole 601 forms can be to there being fixture block to impose the pressing mechanism of clamping force.On the preposition fixture block 2 of front fixture block pair, there is one for connecting the convex body 10 of extensometer.Front fixture block secondary (2,3) comprises preposition fixture block (2) and rearmounted fixture block (3).
As long as tighten handle 7, just can easily sample be clamped, because sample is very little, the holding force needing is little, so need not just sample can be clamped by spanner.Extensometer carry is on preposition fixture block 2, and this fixture block has convex body 10, and for blocking the bayonet socket of extensometer, convex body has rule 1001 on top, for observing extensometer bayonet socket to the distance at sample edge.Strain data extensometer being measured by this distance is revised.On preposition fixture block 2, be provided with the hangers 202 for hanging support extensometer little spring, extensometer can be easily four little springs 14 by convex body 10 both sides be suspended on convex body.Convex body 10 is provided with for identifying the scale 1001 of extensometer dop position.
Accompanying drawing explanation:
Fig. 1 is the structural representation of the utility model fixture.By one just etc. survey view provided the planform of the utility model fixture.
Fig. 2 is the assembly relation schematic diagram between each parts of the utility model fixture, and the mode by explosive view has provided the shape of this fixture all parts and mutual position relationship thereof.
Fig. 3 is the utility model fixture test scheme of installation, has provided the 3 d effect graph of doing experiment with a pair of fixture of the present utility model.
Fig. 4 is the utility model fixture extensometer load mode schematic diagram, and by one, just etc. survey and a cut-open view are providing the utility model fixture using method.
Fig. 5 is the relative position relation schematic diagram between the utility model fixture extensometer bayonet socket and sample.
Embodiment
Below in conjunction with accompanying drawing, structure of the present utility model is described in further detail.
With a pair of the utility model fixture clamping sample, the cylindrical section of jig main body 1 is clamped on the hydraulically operated fixture of MTS, regulate testing machine hydraulic chuck to suitable position, then small test is clamped on fixture of the present utility model, finally by four little springs 14, extensometer 13 is mounted on the preposition fixture block 2 of upper and lower two each and every one fixtures, and records the position δ of extensometer bayonet socket
1and δ
2.If extensometer is just in order to gather strain data, rather than with strain controlled loading, can directly test after recording extensometer bayonet socket position, test after finishing and again strain data is multiplied by a coefficient L/ (L-δ
1-δ
2) can obtain accurate strain value.If use strain Control experiment, first by target instruction target word divided by a coefficient L/ (L-δ
1-δ
2) just can test afterwards.
Fig. 5 has provided the relation between specimen length and extensometer gage length, it is wherein extensometer gage length segment length, for the distance of lower clamp extensometer bayonet socket to edge on fixture, can from the scale 1001 of lower clamp, directly read, for upper fixture to extensometer bayonet socket to fixture under the distance on edge, can from the scale 1001 of upper fixture, directly read, because fixture rigidity with respect to sample is very large, the relation between the strain that logarithmic strain and extensometer record can convert with formula.
Claims (3)
1. one kind for clamping the material test fixture of tiny sample, it is characterized in that, comprise one for being connected to main body (1) on testing machine hydraulically operated fixture, be arranged on two wedge shape fixture blocks in main body (1) secondary, add cover clamp (6), fastening screw ties and pressing mechanism; Wedge shape fixture block pair has front fixture block secondary (2,3) and rear fixture block secondary (4,5), front fixture block secondary (2,3) comprises preposition fixture block (2) and rearmounted fixture block (3), described wedge shape fixture block pair all has " work " word profile, is nested in slidably in the groove (101) that is half " work " font in main body (1); Four bolts that fastening screw ties connect described parts by each fixture block and main body and the respective through hole that adds on cover clamp; The center that adds cover clamp (6) has threaded hole (601), and the screw rod (7) of a band handle (701) is inserted threaded hole (601) formation can be to there being fixture block to impose the pressing mechanism of clamping force; On the preposition fixture block (2) of front fixture block secondary (2,3), there is one for connecting the convex body (10) of extensometer.
According to claim 1 for clamping the material test fixture of tiny sample, it is characterized in that, described convex body (10) is provided with the scale (1001) for identifying extensometer dop position.
According to claim 1 for clamping the material test fixture of tiny sample, it is characterized in that, on preposition fixture block (2), be provided with the hangers (202) for hanging support extensometer little spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007166.1U CN203869943U (en) | 2014-01-06 | 2014-01-06 | Material test fixture for clamping tiny sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007166.1U CN203869943U (en) | 2014-01-06 | 2014-01-06 | Material test fixture for clamping tiny sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203869943U true CN203869943U (en) | 2014-10-08 |
Family
ID=51650883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420007166.1U Expired - Fee Related CN203869943U (en) | 2014-01-06 | 2014-01-06 | Material test fixture for clamping tiny sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203869943U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283397A (en) * | 2018-09-14 | 2019-01-29 | 中国科学院合肥物质科学研究院 | A kind of superconducting conductor ac loss test device |
| CN112730090A (en) * | 2020-11-30 | 2021-04-30 | 中国原子能科学研究院 | Metal material high-temperature tensile elongation marking test device and method |
-
2014
- 2014-01-06 CN CN201420007166.1U patent/CN203869943U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283397A (en) * | 2018-09-14 | 2019-01-29 | 中国科学院合肥物质科学研究院 | A kind of superconducting conductor ac loss test device |
| CN112730090A (en) * | 2020-11-30 | 2021-04-30 | 中国原子能科学研究院 | Metal material high-temperature tensile elongation marking test device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20170106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |