CN205538450U - Universal tester's load anchor clamps - Google Patents
Universal tester's load anchor clamps Download PDFInfo
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- CN205538450U CN205538450U CN201620070697.4U CN201620070697U CN205538450U CN 205538450 U CN205538450 U CN 205538450U CN 201620070697 U CN201620070697 U CN 201620070697U CN 205538450 U CN205538450 U CN 205538450U
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Abstract
The utility model discloses an universal tester's load anchor clamps, it is one loading disc (1) bottom surface welding with the trapezoidal roof beam of loading disc centrosymmetric metal (2), is the length of the trapezoidal roof beam of metal (2) 3 of loading disc diameter 6 doubly, the width of the trapezoidal roof beam of metal (2) is not more than loading disc diameter and is not less than loading disc radius, the bottom surface of the trapezoidal roof beam of metal (2) is the rectangle plane, the top surface and the bottom surface of loading disc (1) of the trapezoidal roof beam of metal (2) are connected. The utility model has the advantages that: overcome the test piece size problem that the loading disc restricted when experimental, can test rectangular shape test piece uniform loading.
Description
Technical field
This utility model relates to Geotechnical Engineering testing equipment, is specifically related to the loading fixture of a kind of universal testing machine.
Background technology
Rock and the compression test of similar material thereof, having great Research Significance for crackle scaling problem under compression existing in the strength problem of study of rocks, the destruction characteristic of rock and rock etc., can the fixture that load of testing machine become the constraints that complete test.
In existing universal testing machine, load disk for load is passed to test specimen from universal testing machine, conventional single shaft pressurized equipment loads load can reach 2000KN, load disk and but limit the test specimen size that can pressurize, the size that common laboratory loads disk is in the majority with Φ 100mm, so for some large-sized rock samples, in the case of loading weight bearing power permission, cannot be carried out experiment because loading disk size is little.
For the compression test of bigger test specimen, generally select the loading equipemtn of bigger specification, it means that the introducing of new equipment, the input of more fund, this is the most also the waste of a kind of resource.
It addition, for the large scale test specimen of some plane stresses, strain problems or strip, use and load disk test specimen carried out uniform load being irrational.So needing to change the loading fixture of testing machine.
Utility model content
The problem existed for existing universal testing machine, technical problem to be solved in the utility model is just to provide the loading fixture of a kind of universal testing machine, and it can adapt to the large scale test specimen uniform load test of large scale test specimen, particularly strip.
Technical problem to be solved in the utility model is realized by such technical scheme, it is loading the wire ladder ellbeam that disk bottom surface welding one is symmetrical to load disc centre, 3-6 times of a length of loading disk diameter of wire ladder ellbeam, the width of wire ladder ellbeam is not more than loading disk diameter and not less than loading disc radius, the bottom surface of wire ladder ellbeam is rectangular planes, and the end face of wire ladder ellbeam is connected with loading disk bottom surface.
This utility model material uses No. 45 steel, through Carburization Treatment, its case carbon 0.8 ~ 1.2%, core phosphorus content is 0.1 ~ 0.25%, the most thermally treated, surface can obtain the highest hardness (HRC58 ~ 62), and core hardness is low, impact resistance, its deformation energy meets requirement (to load axial compression≤1000KN) in loading procedure.
This utility model is loaded fixture by upper and lower two and forms, and two loading fixtures are identical；Two load fixture and are respectively placed in bottom and the top of test test specimen, for load is passed to test specimen from universal testing machine.
On existing universal testing machine, this utility model substituted for original loading disk, and its advantage is: overcomes during test and loads the sample dimensions problem that disk is limited, can test strip test specimen uniform load.
Accompanying drawing explanation
Accompanying drawing of the present utility model is described as follows:
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the front view of one embodiment of this utility model；
Fig. 3 is the top view of embodiment illustrated in fig. 2；
Fig. 4 is the left view of embodiment illustrated in fig. 2；
Fig. 5 is the numerical simulation deformation pattern of embodiment illustrated in fig. 2.
In figure: 1. load disk；2. wire ladder ellbeam；3. snap ring head.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings:
As shown in Figure 1, this utility model is to load the wire ladder ellbeam 2 that disk 1 bottom surface welding one is symmetrical to load disc centre, 3-6 times of a length of loading disk diameter of wire ladder ellbeam 2, the width of wire ladder ellbeam 2 is not more than loading disk diameter and not less than loading disc radius, the bottom surface of wire ladder ellbeam 2 is rectangular planes, and the end face of wire ladder ellbeam 2 is connected with the bottom surface loading disk 1.
Utilize with existing universal testing machine the countersunk head of snap ring head be screwed loading disk as, this utility model is also fixed on universal testing machine upper/lower terminal by snap ring head 3.
Embodiment
The present embodiment is as shown in Figure 2, Figure 3 and Figure 4, load disk 1 a diameter of stock size Φ 100mm, the height loading disk is 100 mm, the long 520mm of wire ladder ellbeam 2, wide 50mm, distance between bottom surface and the end face of wire ladder ellbeam is 102.5 mm, and the trapezoidal base angle of wire ladder ellbeam is 14 °.
When carrying out uniaxial compression test, existing universal testing machine uses two specifications of upper and lower end and is the loading disk of Φ 100 mm, and from universal testing machine, load is passed to test specimen, maximum load load 2000KN.
Intend the uniform load of the rock material applying≤40MPa of pair cross-section a size of 500mm × 50mm.On existing universal testing machine, the bolt of fixing snap ring head is unclamped with screwdriver, take off existing upper and lower end and load disk, install this utility model, before carrying out test specimen pressurization, reliability of the present utility model should be verified: under load action, load pressure head it may happen that inhomogeneous deformation and cause test specimen unbalance stress, fall flat.Because in loading procedure, loading is formed by test specimen is produced displacement extruding, same, this loading fixture also can be by identical power, and owing to this utility model belongs to cantilevered structure, middle with two ends, to produce displacement deformation poor, in order to be ensured of uniform pressurization, this shift differences should be the least, and take here is 0.5% as control line, so selected maximum load load is 40MPa.
The method of reliability demonstration is:
By finite element analysis software Abaqus, this utility model carried out simple stress analysis: assuming that total cross-section 520mm × 50mm region is all taken, by 40MPa(, the peak load that expection loads) evenly load, analyze its deformation.The result of gained is as shown in Figure 5, in figure, the displacement deformation value at a, b, c node is respectively 1.311mm, 0.104mm, 1.311mm, then a, c node is 1.207mm relative to the deformation displacement difference of b node, and relative deformation corner is: 1.207/260*100%=0.46%.
Existing universal testing machine is all test specimen is produced compressive load by displacement increment, under the load action of 40MPa, load support both sides with middle displacement modified difference 0.46%, belong to and can accept scope, can approximate and regard uniform load as, say, that the load of 40MPa is applicable to the present embodiment.
Reliability demonstration result shows: this utility model is reliability.Then, test specimen is placed on this utility model, proceeds by loading, be loaded into anticipated load by pressure cell reading.
Claims (1)
1. the loading fixture of a universal testing machine, it is characterized in that: weld a wire ladder ellbeam (2) symmetrical to load disc centre loading disk (1) bottom surface, 3-6 times of a length of loading disk diameter of wire ladder ellbeam (2), the width of wire ladder ellbeam (2) is not more than loading disk diameter and not less than loading disc radius, the bottom surface of wire ladder ellbeam (2) is rectangular planes, and the end face of wire ladder ellbeam (2) is connected with the bottom surface loading disk (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620070697.4U CN205538450U (en) | 2016-01-26 | 2016-01-26 | Universal tester's load anchor clamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620070697.4U CN205538450U (en) | 2016-01-26 | 2016-01-26 | Universal tester's load anchor clamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205538450U true CN205538450U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620070697.4U Active CN205538450U (en) | 2016-01-26 | 2016-01-26 | Universal tester's load anchor clamps |
Country Status (1)
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| CN (1) | CN205538450U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168559A (en) * | 2016-09-23 | 2016-11-30 | 重庆大学 | For the steel wire of multifunction friction wear testing machine and steel wire rope to grinding jig |
| CN113654876A (en) * | 2021-08-27 | 2021-11-16 | 武汉理工大学 | A even force transfer device for compression test |
-
2016
- 2016-01-26 CN CN201620070697.4U patent/CN205538450U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168559A (en) * | 2016-09-23 | 2016-11-30 | 重庆大学 | For the steel wire of multifunction friction wear testing machine and steel wire rope to grinding jig |
| CN106168559B (en) * | 2016-09-23 | 2018-10-12 | 重庆大学 | Steel wire or steel wire rope for multifunction friction wear testing machine is to grinding jig |
| CN113654876A (en) * | 2021-08-27 | 2021-11-16 | 武汉理工大学 | A even force transfer device for compression test |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |