CN209513426U - A kind of biaxial stretch-formed test device of drop hammer type dynamic - Google Patents
A kind of biaxial stretch-formed test device of drop hammer type dynamic Download PDFInfo
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- CN209513426U CN209513426U CN201821885786.XU CN201821885786U CN209513426U CN 209513426 U CN209513426 U CN 209513426U CN 201821885786 U CN201821885786 U CN 201821885786U CN 209513426 U CN209513426 U CN 209513426U
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- biaxial stretch
- drop hammer
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- 238000012360 testing method Methods 0.000 title claims abstract description 74
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 5
- 239000011888 foil Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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Abstract
The utility model discloses a kind of biaxial stretch-formed test devices of drop hammer type dynamic, feature is the clamping device for including chassis, tup and four groups of four stretching arms being respectively used in clamping test pieces correspondingly, clamping device is oppositely arranged two-by-two, and the carriage moved along the length direction of test specimen stretching arm is provided between clamping device and chassis, tup is located at the surface of test specimen, and four faces of tup lower end are inclined-plane and face correspondingly with four stretching arms of test specimen；Advantage is the present apparatus by tup four groups of clamping devices of driving while movement, is loaded simultaneously to four ends of test specimen, the dynamic mechanically formula for realizing test specimen is biaxial stretch-formed, compact-sized, simple and at low cost；And change the position between the angle on test specimen between two adjacent stretching arms and corresponding two groups of clamping devices, and change the tilt angle of tup lower end surface, it can be achieved to load flexible and changeable the load of test specimen different biaxial stretch-formed angles and different stretch Displacement Ratio.
Description
Technical field
The utility model relates to material mechanical performance test device more particularly to a kind of biaxial stretch-formed tests of drop hammer type dynamic
Device.
Background technique
Stretching is to generate elongation to the pulling force being subject in the plane of material or sample under conditions of experiment or production
Process, with obtain needed for experiment parameter and product.Generally it is divided into uniaxial, twin shaft and multi-shaft stretching as needed, twin shaft is drawn
Stretch is that the shaping method-of research material emerging in recent years mainly by two mutually perpendicular directions applies certain proportion
Power relationship.Due to cruciform specimen biaxial tension-compression strength can comprehensively intuitive reaction material under by biaxial stretch-formed load
Mechanical property, have stronger practicability, therefore, using cruciform specimen biaxial tension-compression strength research have become twin shaft draw
Stretch the principal mode of experimental study.
Currently, be used for biaxial stretch-formed equipment mainly include the following types: (1), by octahedral device, upper and lower two o'clock mentions
For loaded load, the intermediate cruciform specimen of each four slash driving carries out biaxial tension up and down for driving, and device is complex,
And the load moment of load changes, and influences the accuracy of test result；(2), it is loaded by motor and stretches both direction, ten
The stretching arm and lead screw of font test specimen form worm mechanism, are driven by servo motor, and the device is very high to requirement on machining accuracy, fit
For quasi-static detection；(3), it is loaded by hydraulic cylinder, the stretching arm movement of four Driven by Hydraulic Cylinder cruciform specimens, the device
Although the load proportion and loading velocity that load stretches can be adjusted arbitrarily, it requires height to the synchronism of equipment, needs
Expensive electronic equipment coordinated operation, causes the cost of device and complexity to greatly increase.
Summary of the invention
The technical problem to be solved by the utility model is to provide one kind to be stretched based on dynamic mechanically formula, and structure it is simple,
The biaxial stretch-formed test device of drop hammer type dynamic compact, at low cost.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of biaxial stretch-formed survey of drop hammer type dynamic
Trial assembly is set, the clamping device including four stretching arms that chassis, tup and four groups are respectively used in clamping test pieces correspondingly,
The clamping device is oppositely arranged two-by-two, and is provided between the clamping device and the chassis along test specimen stretching arm
The mobile carriage of length direction, the tup is located at the surface of test specimen, and four faces of the tup lower end are
It inclined-plane and is faced correspondingly with four stretching arms of test specimen.
Further, the clamping device includes the fixture of sliding block, locating plate and cylinder, the upper end of the sliding block
Inside is hinged with idler wheel, and horizontal fixture mounting hole is provided in the sliding block, and the fixture is arranged in the fixture
There is gap in mounting hole and between the fixture mounting hole, be provided at the center of the inner end of the fixture mounting hole
Horizontal locating slot, the locating slot are connected with the fixture mounting hole, and the inner end of the fixture is provided with level
Fluting, in the described locating plate insertion fluting and the locating slot, so that on fixture in four groups of clamping devices
Fluting be located in same level, the inner end of the fixture is provided with vertical first positioning hole, first positioning
The fluting is run through in hole, and the stretching arm of test specimen is inserted into the fluting, is provided with second location hole on the stretching arm,
The second location hole is faced with the first positioning hole, and positioning pin passes through the first positioning hole and described the
Two location holes, so that the stretching arm is mutually fixed with the fixture, the outer end of the fixture mounting hole is provided with coaxially
Through-hole, be provided with fixing bolt in the through-hole, the outer end of the fixing bolt and the fixture is spirally connected fixation, institute
The outer surface for the fixture stated is pasted with foil gauge.
Further, the top of the first positioning hole is unthreaded hole, lower part is threaded hole, the lower part of the positioning pin
It is provided with the external screw thread closed with corresponding threaded holes.
Further, the carriage includes sliding rail, and the sliding rail is fixed on the chassis, the cunning
Block is slidably matched with the sliding rail level, and the outer end of the sliding rail is fixedly installed block, is arranged on the sliding rail
Damping block, the damping block are located at the outside of the sliding block；When test specimen is pulled off, damping block is used for energy-absorbing damping, protects
The safety for having protected entire test device extends the service life of device.
Further, it is bolted with positioning screw on the sliding block, when the positioning screw and the sliding rail offset
When, the sliding block and the sliding rail are relatively fixed, when the stretching arm of the wherein test specimen of one group of clamping device corresponding thereto
When fixed, the positioning screw in the clamping device is offseted with sliding rail, keeps sliding block relatively fixed with sliding rail, facilitates remaining clamping
The fixation of the stretching arm of device and test specimen, while also facilitating the position centering of four groups of clamping devices and tup.
Further, displacement sensor is fixedly installed on the sliding block, the lower surface of test specimen is coated with speckle, test specimen
Lower section is provided with mirror, the mirror and the chassis and fixes in 45 degree of inclinations, is fixedly installed height on the chassis
Fast camera, the high speed camera are faced with the mirror；Pass through digital speckle image technology, displacement sensor and strain
Piece can get accurate test data, several groups of experimental data mutual corrections, so that biaxial stretch-formed test data is accurate and reliable.
Further, be arranged with rubber ring on the idler wheel, can energy-absorbing damping, extend idler wheel and sliding block uses the longevity
Life.
Further, the upper and lower surfaces of the stretching arm of test specimen are wholely set respectively extends along its length
Convex ribs can meet variable-angle, load than the load for the dynamic force that can be changed so that the stretcher strain of test specimen is uniform.
Compared with prior art, the utility model has the advantages that the present apparatus drives four groups of same time shifts of clamping device by tup
It is dynamic, four ends of test specimen are loaded simultaneously, the dynamic mechanically formula for realizing test specimen is biaxial stretch-formed, and it is compact-sized, simple, and cost
It is low；And change the position between the angle on test specimen between two adjacent stretching arms and corresponding two groups of clamping devices, with
And change the tilt angle of tup lower end surface, it can be achieved that adding to the different biaxial stretch-formed angles of test specimen and different stretch Displacement Ratio
It carries, loads flexible and changeable；In addition, the clamping device being oppositely arranged only with two groups is stretched to test specimen, it can be achieved that test specimen
Dynamic be uniaxially stretched, versatility is preferable.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the fixture of the utility model and the cooperation schematic diagram of test specimen；
Fig. 3 is the clamping device of the utility model and the cooperation schematic diagram of carriage；
Fig. 4 is the partial sectional view of Fig. 3；
Fig. 5 is the top view of the test specimen of the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
As shown, a kind of biaxial stretch-formed test device of drop hammer type dynamic, including chassis 1, tup 2 and four groups are respectively used to
The clamping device A of four stretching arms 31 in clamping test pieces 3, clamping device A are oppositely arranged two-by-two correspondingly, and clamp dress
It sets and is provided with the carriage that the length direction of the stretching arm 31 along test specimen 3 moves between A and chassis 1, clamping device A includes sliding
The upper end inside of the fixture 6 of block 4, locating plate 5 and cylinder, sliding block 4 is hinged with idler wheel 41, is arranged with rubber ring on idler wheel 41
(not marking in figure), is provided with horizontal fixture mounting hole 42 in sliding block 4, fixture 6 be arranged in fixture mounting hole 42 and with folder
Having has gap between mounting hole 42, be provided with horizontal locating slot 43, locating slot at the center of the inner end of fixture mounting hole 42
43 are connected with fixture mounting hole 42, and the inner end of fixture 6 is provided with horizontal fluting 61, the insertion of locating plate 5 fluting 61 and positioning
In slot 43, so that the fluting 61 on fixture 6 in four groups of clamping device A is located in same level, the inner end of fixture 6 is provided with
Vertical first positioning hole 62, first positioning hole 62 is through fluting 61, and the top of first positioning hole 62 is unthreaded hole, lower part is screw thread
Hole in the insertion of stretching arm 31 fluting 61 of test specimen 3, is provided with second location hole 32 on stretching arm 31, second location hole 32 and the
A positioning hole 62 faces, and the lower part of positioning pin 63 is provided with the external screw thread closed with corresponding threaded holes, and positioning pin 63 passes through first
Location hole 62 and second location hole 32, and the lower part of positioning pin 63 is connect with the lower thread of first positioning hole 62, so that stretching
Arm 31 is fixed with 6 phase of fixture, and the outer end of fixture mounting hole 42 is provided with coaxial through-hole (not marking in figure), is provided in through-hole
Fixing bolt 44, the outer end of fixing bolt 44 and fixture 6 are spirally connected fixation, and the outer surface of fixture 6 is pasted with foil gauge and (does not show in figure
Show)；
Carriage includes sliding rail 7, and sliding rail 7 is fixed on chassis 1, and sliding block 4 is slidably matched with 7 level of sliding rail, sliding rail 7
Outer end is fixedly installed block 71, and damping block 72 is arranged on sliding rail 7, and damping block 72 is located at the outside of sliding block 4, spiral shell on sliding block 4
It is connected to positioning screw 45, when positioning screw 45 offsets with sliding rail 7, sliding block 4 and sliding rail 7 are relatively fixed, are fixedly installed on sliding block 4
Have a displacement sensor (not shown), the lower surface of test specimen 3 is coated with speckle, and the lower section of test specimen 3 is provided with mirror 8, mirror 8 with
Chassis 1 is fixed in 45 degree of inclinations, is fixedly installed high speed camera 9 on chassis 1, and high speed camera 9 is faced with mirror 8, and tup 2
In the surface of test specimen 3, four faces of 2 lower end of tup are inclined-plane 21 and the one-to-one phase of four stretching arms 31 with test specimen 3
Face.
In above-described embodiment, test specimen 3 is cruciform specimen, the upper and lower surfaces difference one of the stretching arm 31 of test specimen 3
Body is provided with the convex ribs 33 extended along its length；In addition, the also desirable test specimen 3 with different adjacent 31 angles of stretching arm,
And change the position between corresponding clamping device A, the tilt angle of 2 lower end surface of tup can be changed, also to realize to test specimen 3 not
With the load of biaxial stretch-formed angle and different stretch Displacement Ratio.
In above-described embodiment, the fixation procedure of test specimen 3 are as follows: the medium position in 6 outer surface of fixture pastes foil gauge, will
Fixture 6 is fitted into the fixture mounting hole 42 of sliding block 4, then locating plate 5 is inserted into the positioning of the fluting 61 and sliding block 4 of fixture 6
In slot 43, and fixture 6 is fixed in sliding block 4 with fixing bolt 44, is successively fixed on the fixture 6 in four groups of clamping device A
In its corresponding sliding block 4, at this point, the fluting 61 on four fixtures 6 is located in same level, so under the action of locating plate 5
It takes out the locating plate 5 in four groups of clamping device A respectively afterwards, then successively inserts the fluting 61 of fixture 6 and the stretching arm 31 of test specimen 3
It connects, then with positioning pin 63 that stretching arm 31 and fixture 6 is fixed, mirror 8 is fixed on chassis 1 in 45 degree of inclinations and is located at test specimen
3 lower section, and high speed camera 9 is fixed on chassis 1, high speed camera 9 is faced with mirror 8, then tup 2 is driven to move down, and is hammered into shape
First 2 lower end surface is touched with the idler wheel 41 on the sliding block 4 in four groups of clamping device A simultaneously, while driving sliding block 4 each along drawing
The length direction of semi-girder 31 is mobile, realizes to the biaxial stretch-formed of test specimen 3.And since the lower surface of test specimen 3 is coated with speckle, utilize number
Word Speckles Technique, light are emitted to high speed camera 9 by mirror 8, so that high speed camera 9 is obtained the stretching image of test specimen 3, with displacement
The test data mutual correction that sensor, foil gauge obtain, so that biaxial stretch-formed test data is accurate and reliable.
Claims (8)
1. a kind of biaxial stretch-formed test device of drop hammer type dynamic, it is characterised in that be respectively used to one including chassis, tup and four groups
The clamping device of one accordingly four stretching arms in clamping test pieces, the clamping device are oppositely arranged two-by-two, and described
The carriage moved along the length direction of test specimen stretching arm, the tup are provided between clamping device and the chassis
Positioned at the surface of test specimen, four faces of the tup lower end are inclined-plane and four one-to-one phases of stretching arm with test specimen
Face.
2. a kind of biaxial stretch-formed test device of drop hammer type dynamic as described in claim 1, it is characterised in that: the clamping dress
The fixture including sliding block, locating plate and cylinder is set, idler wheel is hinged on the inside of the upper end of the sliding block, is set in the sliding block
Be equipped with horizontal fixture mounting hole, the fixture be arranged in the fixture mounting hole and with the fixture mounting hole it
Between there is gap, be provided with horizontal locating slot, the locating slot and institute at the center of the inner end of the fixture mounting hole
The fixture mounting hole stated is connected, and the inner end of the fixture is provided with horizontal fluting, and the locating plate is inserted into described
In fluting and the locating slot, so that the fluting on fixture in four groups of clamping devices is located in same level, it is described
The inner end of fixture is provided with vertical first positioning hole, and the first positioning hole runs through the fluting, the stretching arm of test specimen
In the insertion fluting, second location hole, the second location hole and described first are provided on the stretching arm
Location hole faces, positioning pin pass through the first positioning hole and the second location hole so that the stretching arm with
The fixture is mutually fixed, and the outer end of the fixture mounting hole is provided with coaxial through-hole, is provided in the through-hole solid
Determine bolt, the outer end of the fixing bolt and the fixture is spirally connected fixation, and the outer surface of the fixture is pasted with strain
Piece.
3. a kind of biaxial stretch-formed test device of drop hammer type dynamic as claimed in claim 2, it is characterised in that: described first is fixed
The top in position hole is unthreaded hole, lower part is threaded hole, and the lower part of the positioning pin is provided with the external screw thread closed with corresponding threaded holes.
4. a kind of biaxial stretch-formed test device of drop hammer type dynamic as claimed in claim 2, it is characterised in that: the sliding dress
It sets including sliding rail, the sliding rail is fixed on the chassis, and the sliding block is slidably matched with the sliding rail level, institute
The outer end for the sliding rail stated is fixedly installed block, and damping block is arranged on the sliding rail, and the damping block is located at described
The outside of sliding block.
5. a kind of biaxial stretch-formed test device of drop hammer type dynamic as claimed in claim 4, it is characterised in that: on the sliding block
It is bolted with positioning screw, when the positioning screw offsets with the sliding rail, the sliding block is opposite with the sliding rail
It is fixed.
6. a kind of biaxial stretch-formed test device of drop hammer type dynamic as claimed in claim 2, it is characterised in that: on the sliding block
It is fixedly installed displacement sensor, the lower surface of test specimen is coated with speckle, and mirror, the mirror and institute are provided with below test specimen
The chassis stated is fixedly installed high speed camera in 45 degree inclinations fixations on the chassis, the high speed camera with it is described
Mirror faces.
7. a kind of biaxial stretch-formed test device of drop hammer type dynamic as claimed in claim 2, it is characterised in that: on the idler wheel
It is arranged with rubber ring.
8. a kind of biaxial stretch-formed test device of drop hammer type dynamic as described in claim 1, it is characterised in that: the stretching arm of test specimen
Upper and lower surfaces be wholely set the convex ribs extended along its length respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821885786.XU CN209513426U (en) | 2018-11-15 | 2018-11-15 | A kind of biaxial stretch-formed test device of drop hammer type dynamic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821885786.XU CN209513426U (en) | 2018-11-15 | 2018-11-15 | A kind of biaxial stretch-formed test device of drop hammer type dynamic |
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| Publication Number | Publication Date |
|---|---|
| CN209513426U true CN209513426U (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821885786.XU Withdrawn - After Issue CN209513426U (en) | 2018-11-15 | 2018-11-15 | A kind of biaxial stretch-formed test device of drop hammer type dynamic |
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|---|---|
| CN (1) | CN209513426U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406277A (en) * | 2018-11-15 | 2019-03-01 | 宁波大学 | A kind of biaxial stretch-formed test device of drop hammer type dynamic |
| CN112378760A (en) * | 2021-01-18 | 2021-02-19 | 南京济同检测科技有限公司 | Rubber ring strength detection device with biaxial stretching mechanism |
-
2018
- 2018-11-15 CN CN201821885786.XU patent/CN209513426U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406277A (en) * | 2018-11-15 | 2019-03-01 | 宁波大学 | A kind of biaxial stretch-formed test device of drop hammer type dynamic |
| CN109406277B (en) * | 2018-11-15 | 2024-03-29 | 宁波大学 | Drop hammer type dynamic biaxial stretching testing device |
| CN112378760A (en) * | 2021-01-18 | 2021-02-19 | 南京济同检测科技有限公司 | Rubber ring strength detection device with biaxial stretching mechanism |
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Granted publication date: 20191018 Effective date of abandoning: 20240329 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191018 Effective date of abandoning: 20240329 |