CN206479406U - A kind of compression clamp of measurable deformation - Google Patents
A kind of compression clamp of measurable deformation Download PDFInfo
- Publication number
- CN206479406U CN206479406U CN201720187578.1U CN201720187578U CN206479406U CN 206479406 U CN206479406 U CN 206479406U CN 201720187578 U CN201720187578 U CN 201720187578U CN 206479406 U CN206479406 U CN 206479406U
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- CN
- China
- Prior art keywords
- unit
- module
- amesdial
- bar
- arm bar
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- Expired - Fee Related
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a kind of compression clamp of measurable deformation, including the upper platen being connected with upper connecting pole and the pressing disc being connected with lower connecting pole, upper platen is connected by the first arm bar with amesdial, the pressing disc includes first module and second unit, the first module can rotate around second unit, second unit is connected with lower connecting pole, and first module is connected by the second arm bar with measurement bar.The compression clamp of measurable deformation of the present utility model, pass through the rotation of first module and second unit, amesdial and the requirement of measurement bar axiality can be ensured, axiality is high, the accurate measurement simultaneously of applicable different size samples or component elasticity of compression index and compressive strength index.
Description
Technical field
The utility model is related to the compression clamp of measurable deformation, belongs to Engineering Testing Technique field.
Background technology
Compression clamp is supporting with testing machine, for test material sample or structure compresses intensity, the special fixture of deformation.
In engineering test, extremely important is accurately measured to the deformation after material sample or structure stress.As being carried out material
In compression test, modulus of elasticity when material compresses is determined, provide disproportional yield strength, or drafting material (or structure) compression
Must its deflection be carried out after compression to the sample (or structure) of the material during stress-strain diagram (power --- deformation curve)
Accurate measurement.Deformation in current such experiment is typically measured using extensometer, conventional resistance-strain type extensometer output
Signal is electric signal, is easy to automatic data collection, the processing of instrument, so being most widely used.But have the disadvantage：1. because extensometer is logical
Cross blade directly to contact with sample, the greater impact power produced during sample fracture can be directly passed to the sensing element of extensometer,
Damage measuring mechanism；2. when measuring elastic properties of materials index need to be mounted so that contact extensometer, so the height of sample is not
Can be identical with test intensity index specimen height, that is extensometer can not be installed by surveying the specimen height of intensity index, and survey bullet
Property index sample due to specimen height it is larger relative to sectional dimension, it is possible that unstable phenomenon when sample is pressurized, so
The sample of different height processed is needed during experiment, the increase of sample preparation cost is caused, and once experiment can not obtain elastic index simultaneously
And intensity index, increase experimentation cost.
A kind of a kind of folder that can accurately measure for decrement is disclosed in Chinese utility model patent CN202748268U
Tool.The fixture is the deflection by sample or tested component at the trial, by perpendicular on the connecting plate that is connected with circular pressing plate
The data that the relative displacement that bar is produced after being contacted with amesdial measurement bar is shown on amesdial as sample or component pressure
Compression deformation amount.Weak point is, first, required circular pressing plate size is larger when tested scantling is larger, and is pressed with circle
The length of the connecting plate of plate connection is longer.Circular board size is bigger, connecting plate length is longer, and the rigidity of connecting plate is smaller, experiment
When amesdial measurement deflection in the deformation that produces when will be worked comprising connecting plate, produce larger measurement error.Second,
Vertical with circular pressing plate up and down respectively two are all cylinder pin connection, this connection knot between press post and testing machine in device
Structure is unfavorable for ensureing the axiality between amesdial measurement bar and montant；In addition, it cannot be guaranteed that the depth of parallelism between two plectanes up and down,
I.e. it cannot be guaranteed that the axiality of load added by the end face contacted by two above and below pressure sample or component with circular pressing plate.
Utility model content
Utility model purpose：In order to overcome the deficiencies in the prior art, the utility model provides a kind of measurable change
The compression clamp of shape, applicable different size samples or component elasticity of compression index and compressive strength index are simultaneously accurate to be surveyed
Amount.
Technical scheme：In order to solve the above technical problems, a kind of compression clamp of measurable deformation of the present utility model, including
The upper platen being connected with upper connecting pole and the pressing disc being connected with lower connecting pole, upper platen are connected by the first arm bar and amesdial
Connect, the pressing disc includes first module and second unit, the first module can rotate around second unit, second unit is with
Connecting pole is connected, and first module is connected by the second arm bar with measurement bar.
Preferably, the lower surface of the first module is extended with hemispherical boss, set on the upper surface of second unit
Fluted, hemispherical boss rotates along groove.
Preferably, the amesdial is fixed on by clamping screw in the circular hole of the first arm bar.
Preferably, first arm bar and the second arm bar are variable section structure.
Beneficial effect：The compression clamp of measurable deformation of the present utility model, passes through the rotation of first module and second unit
Turn, it is ensured that amesdial and the requirement of measurement bar axiality, axiality are high, applicable different size sample or component compressions
The accurate measurement simultaneously of elastic index and compressive strength index.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of first module；
Fig. 3 is the structural representation of second unit；
Fig. 4 is the structural representation of the first arm bar.
Embodiment
As shown in Figures 1 to 4, the compression clamp of measurable deformation of the present utility model, including be connected with testing machine it is upper
What platen 1 and pressing disc 3, upper platen 1 and testing machine were taken is cylinder pin connection, while being locked plus check nut 2, it is ensured that on
Platen 1 will not be moved or rotate when working, and pressing disc 3 includes first module 31 and second unit 32, the He of first module 31
Articulated structure form is used between the two parts of second unit 32, it is ensured that sample pressure when being compressed will not produce bias, keep away
The end face that two contact with platen above and below sample or the structure of being excused from an examination is at the trial by uneven load.Second unit 32 and experiment
Machine uses plug-in type connected mode, pressing disc 3 is planar rotated, and is easy between regulation amesdial 6 and measurement bar 7
Axiality, the scale division value of amesdial is 0.001mm, and data record precision is high.
The first arm bar 4, the second arm bar 5 being connected with upper platen 1, pressing disc 3 use variable section structure, connect with platen
The area of section for meeting place is more than and installs the area of section at amesdial 6 or measurement bar 7, so improves the first arm bar of connection
4th, the rigidity of the second arm bar 5, makes the sample or component compress variation that measure more accurate.Upper platen 1, the side of pressing disc 3 are opened
In groove, corresponding first arm bar 4, the second arm bar 5 difference insertion groove, it is connected by screw with upper platen 1, pressing disc 3.Thousand
The sleeve of point table 6, measurement bar 7 are connected between the first arm bar 4, the second arm bar 5 using plug-in type respectively, and with fastening spiral shell
Bolt-lock is fastened.And set the jack of diverse location to be easy to different dimensional structure pressures on first arm bar 4, the second arm bar 5
The measurement of contracting amount.
Measurement bar 7 is made up of the cylinder of two different-diameters, different length, the survey with the gauge head contact portion of amesdial 6
The diameter of gauge rod 7 is more than the diameter with the junction of the first arm bar 4, is easy to the contact of the gauge head of amesdial 6 and measurement bar 7.First is single
It is convex spherical in the middle part of first 31 lower surfaces, the upper surface middle part of second unit 32 is concave spherical surface, the recessed field of conjugate action each other of two sphere one convex one,
When sample or structure stress, the sphere that the bumps are engaged each other can with pressing disc on adjusting sample (or structure) and testing machine it
Between contact surface, it is ensured that the power that walking beam is acted on sample (or structure) is uniform, it is to avoid sample (or structure) is by initial
The deflection that uneven load is produced, calculates if this part deflection participates in result, will be produced for elastic index larger
Error.First arm bar 4 and the second arm bar 5 are cantilever beam, and the constrained maximum of fixing end increases arm bar fixing end chi
It is very little, and variable section structure form is used, its flexural deformation can be reduced, the degree of accuracy of record data is improved.
The implementation steps of the present apparatus are：
(1) the upper connecting pole 8 of upper platen 1 and testing machine is inserted in the moved cross beam fixture hole of testing machine, and inserts pin
Nail, then tightens check nut 2.
(2) the lower connecting pole 9 of second unit 32 and testing machine is inserted in testing machine fixed cross beam fixture hole, then by first
Unit 31 is smoothly placed on second unit 32.
(3) amesdial 6 is inserted in the jack set on the first arm bar 4 of upper platen, and thousand is fixed with fastening bolt
At the sleeve of point table 6, clamping force should not be excessive, so as not to colleting deformation and block the measuring staff toward amesdial 6.
(4) measurement bar 7 is inserted in the jack set on the second arm bar 5 of pressing disc, and fixed with fastening bolt.With
Hand rotates the top half of pressing disc 3, the relative position of adjustment measurement bar 7 and the measuring staff of amesdial 6, make the axis of measurement bar 7 with
The axis coaxle of amesdial measuring staff.
(5) it is put into test specimen between upper platen 3 and pressing disc 4.
(6) firing test machine, by the zeros data on amesdial 6 in the case that no-load is acted on test specimen, when
During testing machine cross beam movement, to test specimen imposed load, test specimen is deformed, and makes the gauge head and measurement bar 7 of amesdial 6
Upper surface contact, and then drive amesdial 6 measuring staff to produce compression.
(7) load and compress variation on test specimen are read using test engine data acquisition system.
Described above is only preferred embodiment of the present utility model, it should be pointed out that：For the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (4)
1. a kind of compression clamp of measurable deformation, it is characterised in that：Including the upper platen that is connected with upper connecting pole and with lower company
The pressing disc of post connection is connect, the upper platen is connected by the first arm bar with amesdial, the pressing disc includes first module
And second unit, the first module can be rotated around second unit, and second unit is connected with lower connecting pole, and first module passes through
Two arm bars are connected with measurement bar.
2. the compression clamp of measurable deformation according to claim 1, it is characterised in that：The lower surface of the first module
Hemispherical boss is extended with, groove is provided with the upper surface of second unit, hemispherical boss rotates along groove.
3. the compression clamp of measurable deformation according to claim 1, it is characterised in that：The amesdial passes through locking screw
Bolt is fixed in the circular hole of the first arm bar.
4. the compression clamp of measurable deformation according to claim 1, it is characterised in that：First arm bar and second
Arm bar is variable section structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720187578.1U CN206479406U (en) | 2017-02-28 | 2017-02-28 | A kind of compression clamp of measurable deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720187578.1U CN206479406U (en) | 2017-02-28 | 2017-02-28 | A kind of compression clamp of measurable deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206479406U true CN206479406U (en) | 2017-09-08 |
Family
ID=59746915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720187578.1U Expired - Fee Related CN206479406U (en) | 2017-02-28 | 2017-02-28 | A kind of compression clamp of measurable deformation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206479406U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562485A (en) * | 2018-04-16 | 2018-09-21 | 北京工业大学 | It is a kind of can control accurate flexbile gear radial-deformation fatigue wear test fixture and test method |
-
2017
- 2017-02-28 CN CN201720187578.1U patent/CN206479406U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562485A (en) * | 2018-04-16 | 2018-09-21 | 北京工业大学 | It is a kind of can control accurate flexbile gear radial-deformation fatigue wear test fixture and test method |
| CN108562485B (en) * | 2018-04-16 | 2020-11-27 | 北京工业大学 | Fatigue wear test fixture capable of accurately regulating and controlling radial deformation of flexible gear and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170908 Termination date: 20200228 |