CN110068497A - Test the clamping device and method of more small column sample axial direction shock resistance - Google Patents
Test the clamping device and method of more small column sample axial direction shock resistance Download PDFInfo
- Publication number
- CN110068497A CN110068497A CN201910375225.8A CN201910375225A CN110068497A CN 110068497 A CN110068497 A CN 110068497A CN 201910375225 A CN201910375225 A CN 201910375225A CN 110068497 A CN110068497 A CN 110068497A
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- small column
- column sample
- axial direction
- shock resistance
- test
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Classifications
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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
- G01N3/02—Details
- G01N3/04—Chucks
-
- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0464—Chucks, fixtures, jaws, holders or anvils with provisions for testing more than one specimen at the time
- G01N2203/0476—Chucks, fixtures, jaws, holders or anvils with provisions for testing more than one specimen at the time in parallel
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to axial shock resistance the field of test technology, more particularly to a kind of clamping device and method for testing more small column sample axial direction shock resistance, the clamping device for testing more small column sample axial direction shock resistance includes lower fixture and upper fixture, multiple mounting grooves are evenly arranged in the upper surface of the lower fixture, it is provided with and the one-to-one placed hole of multiple mounting grooves in the lower surface of the upper fixture, tapped through hole is provided with above the placed hole, and communicate placed hole and tapped through hole, fine tuning threaded post is provided in each tapped through hole, the present invention adapts to heavier provisioned in existing falling weight impact test instrument drop hammer using the method for disposably filling more small column sample disperses impact forces, the column sample of the lesser high molecular material type of size can be carried out in the case where being changed without test apparatus Because of test error brought by environmental condition difference when testing, and the repeatedly parallel columnar sample of test high molecular material type can be reduced.
Description
Technical field
The invention belongs to axial shock resistance the field of test technology, and in particular to a kind of more small column sample axis of test
To the clamping device and method of shock resistance.
Background technique
The high molecular material profile (including bar, tubing etc.) of extrusion molding is big due to producing in molding preparation process
The orientation of strand, to cause anisotropy of this kind of material in mechanical property.The power of this kind of material is characterized in test
When learning performance, axial Mechanics Performance Testing when especially more demanding to the shock resistance of material, tests its axial anti-impact
Hitting performance is to characterize an importance of material mechanical performance.Since the mechanical property of high molecular material profile prepares work with it
Skill is closely related, when implementing axial shock resistance test to this kind of material, in order to measure the true mechanical property of profile, and one
As be that the section steel cutting of quasi- actual use is surveyed at column sample (being circular, circular ring shape column sample including section)
Examination.
Falling weight impact test is a main test method of current test column sample axial direction shock resistance.It is testing
In the process, drop impact column is usually used one by one by after tested column sample at the temperature required held for some time
Shape sample obtains the test data of each parallel columnar sample, then obtains its average value as test result.It is fallen by changing
The height of drop (drop height) of hammer, impact velocity used by adjustable impact column sample, to investigate and characterization column examination
Axial shock resistance of the sample under different impact velocitys.
In column sample lesser using falling weight impact test test size, presently, there are existing falling weight impact test instrument
The standard drop hammer provisioned in device is heavier, small column examination can not be obtained under conditions of testing impact velocity larger (i.e. drop height is larger)
The case where shock resistance valid data of sample.In addition, high molecular material and metal material or small molecule material are in mechanical property
One in performance is critically important the difference is that its test data is very related to test condition, environmental condition when test
(including environment temperature), which changes, will cause the change of test data, therefore it is required that in test high molecular material column sample
Mechanical property when, there is consistent environmental condition when should guarantee to test each parallel columnar sample as far as possible.In spite of so wanting
It asks, in actual test, also inevitably when testing parallel columnar sample, difference occurs in environmental condition.
Summary of the invention
The present invention, aiming to the above problems, provides a kind of clamping dresses for testing more small column sample axial direction shock resistance
It sets and method.
The invention adopts the following technical scheme in order to achieve the above objectives:
The clamping device of more small column sample axial direction shock resistance, including lower fixture and upper fixture are tested, described
The upper surface of lower fixture is evenly arranged with multiple mounting grooves, is provided with multiple mounting grooves one by one in the lower surface of the upper fixture
Corresponding placed hole.
Further, it is provided with tapped through hole above the placed hole, and communicates placed hole and tapped through hole, each
Fine tuning threaded post is provided in tapped through hole, to adjust the height of fine tuning threaded post according to the height of small column sample, so that
Multiple small column sample uniform forces.
Further, the upper surface of the fine tuning threaded post is provided with torsion auxiliary tank, to facilitate torsion fine tuning screw thread
Column.
Further, the fine tuning threaded post is " convex " type, and top is threaded post, and lower part is disk, and the diameter of disk is not
Less than the outer diameter of small column sample, to guarantee that with the part of small column sample contacts be smooth surface, to reduce to reality
The influence tested.
Further, the number of the mounting groove and placed hole is 6.
The method for testing more small column sample axial direction shock resistance, comprising the following steps:
A, cutting prepares several equal sized small column samples, and guarantees that small column sample meets dimension precision requirement
And two cross sections of small column sample are parallel to each other and perpendicular to axial direction, the axial length L of the small column sample of precise measurement0
With cross-sectional area S；
B needs for several small column samples to be packed into the more small column sample axial direction shock resistance of test according to test
In the clamping device of performance, and by adjusting the height of fine tuning threaded post, guarantee uniform force between several small column samples, so
The clamping device for entirely testing more small column sample axial direction shock resistance is put into thermostatic equipment afterwards and is kept the temperature；
The clamping device for entirely testing more small column sample axial direction shock resistance after heat preservation is placed on and drops hammer by C
On the test platform of impact test instrument, drop impact test is carried out；
Small column sample is taken out from the clamping device for testing more small column sample axial direction shock resistance, is measured by D
Its axial length L；
E, using following εWFormula calculate the unit impact energy dependent variable of each small column sample, calculate several parallel small
The average value of the unit impact energy dependent variable of column sample as test result,
Wherein, εWFor unit impact energy dependent variable, dimension is [J/m2]-1, L0, L be that small column sample is being dropped hammer respectively
Before impact, later axial length；S is cross-sectional area of the small column sample before by drop impact；M is quality of dropping hammer；H is
Drop height；G is acceleration of gravity；N is to be put into small column in the clamping device for testing more small column sample axial direction shock resistance
The number of sample；The physical significance of unit impact energy dependent variable is that the impact energy that small column sample per unit sectional area is born is made
With lower axial strain amount occurred；The numerical value of unit impact energy dependent variable is bigger, shows the axial shock resistance of small column sample
Performance is better.
Compared with prior art the invention has the following advantages that
1, the present invention adapts to existing drop impact using the method for disposably filling more small column sample disperses impact forces
It is heavier provisioned in test apparatus to drop hammer, it can be in the case where being changed without test apparatus to the lesser high molecular material type of size
Column sample tested；
2, because of environmental condition difference institute when the present invention can reduce the repeatedly parallel columnar sample of test high molecular material type
Bring test error；
3, the present invention can be adjusted as needed is tested small column sample quantities, according to the anti-impact for being tested small column sample material
Performance condition is hit, pillar can be placed by adjusting in clamping device under conditions of fixed standard hammers weight, fixed impact velocity into shape
The quantity of shape sample, to change the size of impact energy suffered by each small column sample；
4, the present invention is provided with fine tuning threaded post, and the height of threaded post can be finely tuned according to the high low adjustment for being tested small column sample
It is low guaranteed to be tested impact force suffered by small column sample it is identical；
5, the present invention is provided with the adjusting that torsion auxiliary tank facilitates fine tuning threaded post in the upper surface of fine tuning threaded post.
Detailed description of the invention
Fig. 1 is side view of the invention；
Fig. 2 is top view of the invention；
Fig. 3 is the sterogram that the embodiment of the present invention 1 tests medium and small column sample；
Wherein descend fixture -1, upper fixture -2, mounting groove -3, placed hole -4, tapped through hole -5, fine tuning threaded post -
6, auxiliary tank -7 is reversed.
Specific embodiment
For the technical solution that the present invention is further explained, the present invention is carried out with reference to the accompanying drawings and embodiments further
Explanation.
As shown in Figure 1 to Figure 3, the clamping device of more small column sample axial direction shock resistance, including lower fixture 1 are tested
With upper fixture 2, multiple mounting grooves 3 are evenly arranged in the upper surface of the lower fixture 1, are set in the lower surface of the upper fixture 2
Be equipped with the one-to-one placed hole 4 of multiple mounting grooves 3, the number of the mounting groove 3 and placed hole 4 is 6.In the placement
It is provided with tapped through hole 5 above hole 4, and communicates placed hole 4 and tapped through hole 5, is provided in each tapped through hole 5 micro-
Threaded post 6 is adjusted, to adjust the height of fine tuning threaded post 6 according to the height of small column sample, so that multiple small column sample stress
Uniformly.The upper surface of the fine tuning threaded post 6 is provided with torsion auxiliary tank 7, to facilitate torsion fine tuning threaded post 7.It is described micro-
Tune threaded post 6 is " convex " type, and top is threaded post, and lower part is disk, and the diameter of disk is not less than the outer diameter of small column sample, with
Guarantee that with the part of small column sample contacts be smooth surface, to reduce the influence to experiment.
The method for testing more small column sample axial direction shock resistance, comprising the following steps:
A, cutting prepares several equal sized small column samples, and guarantees that small column sample meets dimension precision requirement
And two cross sections of small column sample are parallel to each other and perpendicular to axial direction, using each small column sample of vernier caliper measurement
Diameter and axial length L0, measure the aperture of each small column sample using measuring microscope, every kind dimensional measurement 5 times, take
The cross-sectional area S of each small column sample is calculated according to surveyed dimension data for average value；
B needs for several small column samples to be packed into the more small column sample axial direction shock resistance of test according to test
In the clamping device of performance, and by adjusting the height of fine tuning threaded post 6, guarantee uniform force between several small column samples,
Then the clamping device for entirely testing more small column sample axial direction shock resistance is put into thermostatic equipment and is kept the temperature；
The clamping device for entirely testing more small column sample axial direction shock resistance after heat preservation is placed on and drops hammer by C
On the test platform of impact test instrument, drop impact test is carried out；
Small column sample is taken out from the clamping device for testing more small column sample axial direction shock resistance, is measured by D
Its axial length L；
E, using following εWFormula calculate the unit impact energy dependent variable of each small column sample, calculate several parallel small
The average value of the unit impact energy dependent variable of column sample as test result,
Wherein, εWFor unit impact energy dependent variable, dimension is [J/m2]-1, L0, L be that small column sample is being dropped hammer respectively
Before impact, later axial length；S is cross-sectional area of the small column sample before by drop impact；M is quality of dropping hammer；H is
Drop height；G is acceleration of gravity；N is to be put into small column in the clamping device for testing more small column sample axial direction shock resistance
The number of sample；The physical significance of unit impact energy dependent variable is that the impact energy that small column sample per unit sectional area is born is made
With lower axial strain amount occurred；The numerical value of unit impact energy dependent variable is bigger, shows the axial shock resistance of small column sample
Performance is better, and following table is the test result of the present embodiment.
Main feature and advantage of the invention has been shown and described above, it is obvious to a person skilled in the art that this
Invention is not limited to the details of above-mentioned exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention,
The present invention can be realized in other specific forms.Therefore, in all respects, the embodiments should be taken as demonstrations
, and be non-limiting, the scope of the invention being indicated by the appended claims rather than by the foregoing description, it is intended that will fall
All changes within the meaning and scope of the equivalents of the claims are included within the present invention.It should not will be in claim
Any appended drawing reference is construed as limiting the claims involved.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. testing the clamping device of more small column sample axial direction shock resistance, it is characterised in that: including lower fixture (1) and upper
Fixture (2) is evenly arranged with multiple mounting grooves (3) in the upper surface of the lower fixture (1), the following table in the upper fixture (2)
Face is provided with and the one-to-one placed hole (4) of multiple mounting grooves (3).
2. the clamping device of the more small column sample axial direction shock resistance of test according to claim 1, feature exist
In: the placed hole (4) top is provided with tapped through hole (5), and communicates placed hole (4) and tapped through hole (5), each
Fine tuning threaded post (6) is provided in tapped through hole (5), to adjust fine tuning threaded post (6) according to the height of small column sample
Just, so that multiple small column sample uniform forces.
3. the clamping device of the more small column sample axial direction shock resistance of test according to claim 2, feature exist
In: the upper surface of fine tuning threaded post (6) is provided with torsion auxiliary tank (7), to facilitate torsion fine tuning threaded post (7).
4. the clamping device of the more small column sample axial direction shock resistance of test according to claim 3, feature exist
In: the fine tuning threaded post (6) is " convex " type, and top is threaded post, and lower part is disk, and the diameter of disk is tried not less than small column
The outer diameter of sample, to guarantee that with the part of small column sample contacts be smooth surface, to reduce the influence to experiment.
5. the clamping device of the more small column sample axial direction shock resistance of test according to claim 1-4,
It is characterized by: the number of the mounting groove (3) and placed hole (4) is 6.
6. utilizing the described in any item clamping devices for testing more small column sample axial direction shock resistances of claim 1-5
Test method, it is characterised in that: the following steps are included:
A, cutting prepare several equal sized small column samples, and guarantee that small column sample meets dimension precision requirement and small
Two cross sections of column sample are parallel to each other and perpendicular to axial direction, the axial length Ls of the small column sample of precise measurement0And cross
Area of section S；
B needs for several small column samples to be packed into the more small column sample axial direction shock resistance of test according to test
Clamping device in, and by adjusting the height of fine tuning threaded post (6), guarantee uniform force between several small column samples, so
The clamping device for entirely testing more small column sample axial direction shock resistance is put into thermostatic equipment afterwards and is kept the temperature；
The clamping device for entirely testing more small column sample axial direction shock resistance after heat preservation is placed on drop impact by C
On the test platform of test apparatus, drop impact test is carried out；
Small column sample is taken out from the clamping device for testing more small column sample axial direction shock resistance, measures its axis by D
To length L；
E, using following εWFormula calculate the unit impact energy dependent variable of each small column sample, calculate several parallel small columns
The average value of the unit impact energy dependent variable of sample as test result,
Wherein, εWFor unit impact energy dependent variable, dimension is [J/m2]-1, L0, L be small column sample respectively by drop impact
Before, axial length later；S is cross-sectional area of the small column sample before by drop impact；M is quality of dropping hammer；H is to fall
It is high；G is acceleration of gravity；N is to be put into small column examination in the clamping device for testing more small column sample axial direction shock resistance
The number of sample；The physical significance of unit impact energy dependent variable is the impact energy effect that small column sample per unit sectional area is born
Lower axial strain amount occurred；The numerical value of unit impact energy dependent variable is bigger, shows the axial impact resistance of small column sample
It can be better.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910375225.8A CN110068497B (en) | 2019-05-07 | 2019-05-07 | Clamping device and method for testing axial impact resistance of multiple small columnar samples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910375225.8A CN110068497B (en) | 2019-05-07 | 2019-05-07 | Clamping device and method for testing axial impact resistance of multiple small columnar samples |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110068497A true CN110068497A (en) | 2019-07-30 |
| CN110068497B CN110068497B (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910375225.8A Expired - Fee Related CN110068497B (en) | 2019-05-07 | 2019-05-07 | Clamping device and method for testing axial impact resistance of multiple small columnar samples |
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| CN (1) | CN110068497B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726617A (en) * | 2019-10-16 | 2020-01-24 | 南方科技大学 | High-throughput indentation creep testing device for gradient material |
Citations (4)
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|---|---|---|---|---|
| SU750325A1 (en) * | 1978-03-23 | 1980-07-23 | Предприятие П/Я А-3603 | Device for tensile testing of specimens |
| JP2005274396A (en) * | 2004-03-25 | 2005-10-06 | Toshiba Digital Media Engineering Corp | Drop tester, drop test method, and mounting member |
| CN204389288U (en) * | 2015-01-19 | 2015-06-10 | 青岛科技大学 | The clamp device of a kind of compound substance machinery performance test |
| CN108362566A (en) * | 2018-01-05 | 2018-08-03 | 南方科技大学 | A kind of high throughput creep test device load loading system and compression creep equipment |
-
2019
- 2019-05-07 CN CN201910375225.8A patent/CN110068497B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU750325A1 (en) * | 1978-03-23 | 1980-07-23 | Предприятие П/Я А-3603 | Device for tensile testing of specimens |
| JP2005274396A (en) * | 2004-03-25 | 2005-10-06 | Toshiba Digital Media Engineering Corp | Drop tester, drop test method, and mounting member |
| CN204389288U (en) * | 2015-01-19 | 2015-06-10 | 青岛科技大学 | The clamp device of a kind of compound substance machinery performance test |
| CN108362566A (en) * | 2018-01-05 | 2018-08-03 | 南方科技大学 | A kind of high throughput creep test device load loading system and compression creep equipment |
Non-Patent Citations (1)
| Title |
|---|
| 周敬 等: "发射药落锤撞击试验及评价方法研究", 《爆破器材》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726617A (en) * | 2019-10-16 | 2020-01-24 | 南方科技大学 | High-throughput indentation creep testing device for gradient material |
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| Publication number | Publication date |
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| CN110068497B (en) | 2021-09-03 |
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