CN106483019A - A kind of plate tensile sample stretching clamp and its using method - Google Patents
A kind of plate tensile sample stretching clamp and its using method Download PDFInfo
- Publication number
- CN106483019A CN106483019A CN201611071698.1A CN201611071698A CN106483019A CN 106483019 A CN106483019 A CN 106483019A CN 201611071698 A CN201611071698 A CN 201611071698A CN 106483019 A CN106483019 A CN 106483019A
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- China
- Prior art keywords
- sample
- fixture
- test
- clamp body
- stretching
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- 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.)
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- 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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- 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
Abstract
The invention discloses a kind of plate tensile sample stretching clamp is it is characterised in that this fixture includes：Clamp body (3,5), its one end is provided with pin hole (7), and by pin (2) and tensile testing machine connecting rod (1,6) connect, axis for ensureing test pulling force, fixture and test block overlaps, described clamp body (3,5) the other end is provided with a longitudinal fluting running through fixture, the bottom of described groove is sample cell (8), the thickness of the width ratio test specimen (4) of sample cell (8) is slightly larger, carries out tension test for ensureing that sample (4) can be put in described clamp body (3,5).The invention also discloses a kind of stretching test method applying described fixture.The solution of the present invention is provided with a longitudinal fluting running through fixture by the end in clamp body, can carry out tension test to various high intensity, high rigidity and unmanageable sample.
Description
Technical field
The invention belongs to field of fixtures, more particularly, to a kind of plate tensile sample stretching clamp and its using method.
Background technology
High temperature alloy is the critical material that Aero-Space numbers of hot-side engine position uses, in advanced aero-engine,
High temperature alloy consumption accounts for electromotor total amount more than 60%.The mechanical property of such alloy material, including room temperature/drawing by high temperature
Energy, fatigue behaviour etc. are the important indexs weighing material under high temperature operating conditions.
At present, metal material test performance is frequently with cupping machine, when carrying out high temperature test, using threaded knot
Structure, is threadeded with the pull bar of cupping machine using being test for sample.Although this kind of sample in process of the test with
The connection of testing machine pull bar fastens very much, but still there are many weak points.
Patent documentation CN102928288A discloses a kind of tensile test fixture, including bottom plate, auxiliary splint and cushion block, main
Clamping plate bottom is provided with panel bolts hole, and bottom plate, auxiliary splint, cushion block are connected by fixing bolt；Auxiliary splint can fixed
Slide on bolt；Bottom plate is provided with the first caging bolt；Cushion block is provided with the second caging bolt.This fixture is applied to surface light
Sliding and vertical clamp surface should not apply larger self-lock force, the tensile test fixture of test specimen in irregular shape, and solution shape is not
Coupling, the problem relying on increase self-lock force raising friction and making test piece end destroy.But patent documentation CN102928288A is public
There are the following problems for the tensile test fixture opened：
(1) in terms of sample processing, because using threaded, the requirement on machining accuracy for sample is higher, tested
Have a try sample intensity higher when, such as nickel base superalloy, there is higher intensity and hardness, when being machined out, need high-quality
Cutter just can be processed, undoubtedly increased sample processing cost.The difficult-to-machine material of other hardness height (HRC ＞ 50), example
As high-strength mould steel and ceramic metal etc., it is difficult to using machine-tooled method.Meanwhile, for using helicitic texture
Fixture is it is impossible to test to undersized sample.
(2) configuration aspects, the screw thread of screw thread sample and fixture long-time, hot conditionss work when, be susceptible to aoxidize
And sintering phenomenon, a series of problems, such as cause sample and fixture to thread off.If fixture screw thread timeliness or connection are good, need
Fixture to be reinstalled and tested sample, lose time and manpower and materials.
Content of the invention
Disadvantages described above for prior art or Improvement requirement, the present invention provides a kind of plate tensile sample stretching clamp and its makes
With method, its object is to be provided with a longitudinal fluting running through fixture by the end in clamp body, can be to various high-strength
Degree, high rigidity and unmanageable sample carry out tension test, effectively overcome the threaded processing to sample in prior art
The high problem of required precision.
To achieve these goals, according to one aspect of the present invention, a kind of plate tensile sample stretching clamp, its feature are provided
It is, this fixture includes：Clamp body, its one end is provided with pin hole, and is connected with tensile testing machine connecting rod by pin, is used for
Ensure that the axis of test pulling force, fixture and test block overlaps, the other end of described clamp body is provided with one and runs through fixture
Longitudinal fluting, the bottom of described groove is sample cell, and the thickness of the width ratio test specimen of sample cell is slightly larger, permissible for ensureing sample
Put into and in described clamp body, carry out tension test.
Further, the bottom of described groove is circular arc, and the radius of curvature of described circular arc is with the circular arc curvature of sample partly
Footpath is consistent, for ensureing that described sample fitted tightly with described clamp body in drawing process.
Further, described groove is being parallel portion near clamp body end sections, and described parallel portion is put down with sample
The width of row section is consistent, is used for ensureing in sample loading process, fixture, sample, pulling force are in parastate.
Further, described groove carries out chamfered, to avoid stress concentration.
Further, the material of described clamp body is high intensity nickel-base high-temperature alloy material.
According to another aspect of the present invention, provide a kind of a kind of stretching examination of the described plate tensile sample stretching clamp of application
Proved recipe method is it is characterised in that the method comprises the steps：
(1) described clamp body is connected with tensile testing machine connecting rod by pin；
(2) sample is fixed in described clamp body；
(3), after furnace temperature to be heated is increased to predetermined temperature and stablizes, pretension is carried out to described clamp body and sample；
(4) set extensograph parameter, tension test is carried out to described sample.
Further, described predetermined temperature is 25 DEG C～1000 DEG C.
In general, by the contemplated above technical scheme of the present invention compared with prior art, can obtain down and show
Beneficial effect：
(1) stretching clamp of the present invention, is provided with a longitudinal fluting running through fixture by the end in clamp body, permissible
Tension test is carried out to various high intensity, high rigidity and unmanageable sample, it is threaded right in prior art effectively to overcome
The high problem of the requirement on machining accuracy of sample.
(2) stretching clamp of the present invention, clamp body one end is provided with pin hole, and by pin and tensile testing machine connecting rod
Connect, for ensureing test pulling force, the axis of fixture and test block overlap, load convenient it is ensured that concentricity, fixture and examination
Sample stable connection.
(3) stretching clamp of the present invention, the material of described clamp body is high intensity nickel-base high-temperature alloy material, it is possible to achieve
Experimental temperature scope, from room temperature to 1000 DEG C, expands test temperature scope, and efficiently solves screw thread company in prior art
Connect, the problem being susceptible under the high temperature conditions aoxidize and sinter.
(4) stretching clamp of the present invention, requires relatively low, sample is easy to process to sample, can be using the wire cutting of low cost
Mode is processed to sample, can sample in any direction, can test small size sample, reduces experimentation cost, save resources.
Brief description
Fig. 1 is a kind of assay device overall schematic figure that is related to of plate tensile sample stretching clamp of the embodiment of the present invention；
Fig. 2 is a kind of plate tensile sample stretching clamp schematic diagram of the embodiment of the present invention；
Fig. 3 is a kind of sample schematic diagram that is related to of plate tensile sample stretching clamp of the embodiment of the present invention；
Fig. 4 is a kind of stress strain curve figure that is related to of plate tensile sample stretching clamp of the embodiment of the present invention；
Fig. 5 is a kind of stress strain curve figure that is related to of plate tensile sample stretching clamp of the embodiment of the present invention.
In Fig. 1 and Fig. 2,1- tensile testing machine upper connecting rod, 2- pin, 3- upper fixture body, 4- test sample, 5- lower clamp
Body, 6- tensile testing machine lower connecting rod, 7- pin hole, 8- sample cell.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, not
For limiting the present invention.As long as additionally, involved technical characteristic in each embodiment of invention described below that
The conflict of not constituting between this just can be mutually combined.
Fig. 1 is a kind of assay device overall schematic figure that is related to of plate tensile sample stretching clamp of the embodiment of the present invention；Fig. 2
A kind of plate tensile sample stretching clamp schematic diagram for the embodiment of the present invention.As depicted in figs. 1 and 2, a kind of plate tensile sample stretching folder
Tool, top is connected in measurer for pulling force upper connecting rod 1 by pin 2, fixture top and measurer for pulling force upper connecting rod 1 and pin
It is attached by gap cooperation it is ensured that test specimens 4 remain axially in experimentation between hole 7 and pin 2, and protect
Demonstrate,prove test pulling force to overlap with the axis of fixture and test block.
As shown in figure 1, there is a longitudinal fluting running through fixture, groove arc part radius of curvature and piece in fixture lower end
The excessive radius of curvature of shape tensile sample circular arc consistent it is ensured that sample two ends in drawing process accept uniformly, lower end parallel portion
Consistent with sample parallel-segment width it is ensured that in sample loading process fixture, sample, active force be in parastate.
Groove top is sample cell 8, and the width ratio thickness of sample of sample cell 8 is slightly larger, both ensure that sample 4 can be without hindrance
Put in fixture, its sample thickness azimuth axis and pulling force diameter parallel can be effectively ensured again.
As shown in figure 1, the structure of lower clamp body 5 is identical with the structure of upper fixture body 3.
When being stretched, first upper fixture body 3 is connected with test machine upper connecting rod 1, puts into after groove after sample, then under general
Clamp body 5 is connected with test machine lower link 6, finally puts into sample 4 in sample cell 8, adjusts the height of test machine upper and lower strut,
Sample is made to keep plumbness.
Embodiment 1
A kind of stretching test method of embodiments of the invention, a kind of described plate tensile sample stretching clamp of application completes, this
In embodiment, the fixture of the application present invention carries out tension test to nickel base superalloy, and the method comprises the steps：
(1) sheet specimens 4 shown in Fig. 3 are processed using wire cutting method；
(2) is polished with sand paper in the surface and side of sheet specimens 4, to improve specimen surface flatness；
(3) with acetone soln, the surface of sample 4 is carried out, to remove surface and oil contaminant and impurity；
(4) stretching clamp 3,5 is fixed to cupping machine two end link 1, on 6；
(5) sample 4 fixation is proceeded in fixture, after furnace temperature to be heated is increased to 650 DEG C and stablizes, to fixture and sample
Carry out pretension；
(6) set extensograph parameter, tension test is carried out to sample；
(7) carry out data processing, obtain stress strain curve, as shown in Figure 4.
Embodiment 2
A kind of stretching test method of embodiments of the invention, a kind of described plate tensile sample stretching clamp of application completes, this
In embodiment, the fixture of the application present invention carries out tension test to nickel base superalloy, and the method comprises the steps：
(1) sheet specimens 4 shown in Fig. 3 are processed using wire cutting method；
(2) using sand paper, the side circular arc of sheet specimens 4 is carried out with polishing processing, reduce because drawing on the surface that processing causes
Wound, it is to avoid sample stress in drawing process is concentrated and produced abnormal fracture；Improve the specimen surface depth of parallelism simultaneously；
(3) with acetone soln, the surface of sample 4 is carried out, to remove surface and oil contaminant and impurity；
(4) stretching-machine upper connecting rod is risen a segment distance, fixture is fixed on the upper and lower pull bar of stretching-machine by pin.Adjust
Section drawbar height, makes two fixtures close to each other, but does not contact；
(5) sample 4 fixation is proceeded in fixture, under the conditions of 25 DEG C of room temperature, will move on drawbar height, until under stretching sample
Part is fitted with lower clamp cambered surface；
(6) set extensograph parameter, tension test is carried out to sample；
(7) carry out data processing, obtain stress strain curve, as shown in Figure 5.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, not in order to
Limit the present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc., all should comprise
Within protection scope of the present invention.
Claims (7)
1. a kind of plate tensile sample stretching clamp is it is characterised in that this fixture includes：Clamp body (3,5), its one end is provided with pin hole
(7), and by pin (2) connect with tensile testing machine connecting rod (1,6), for ensureing test pulling force, fixture and test block
Axis overlap, the other end of described clamp body (3,5) is provided with a longitudinal fluting running through fixture, the bottom of described groove
For sample cell (8), the thickness of the width ratio test specimen (4) of sample cell (8) is slightly larger, for ensureing that sample (4) can put described folder into
Specifically carry out tension test in (3,5).
2. a kind of plate tensile sample stretching clamp according to claim 1 is it is characterised in that the bottom of described groove is circular arc
Shape, the radius of curvature of described circular arc is consistent with the circular arc curvature radius of sample (4), for ensureing described sample (4) stretched
Described in Cheng Zhongyu, clamp body fits tightly.
3. a kind of plate tensile sample stretching clamp according to claim 1 and 2 is it is characterised in that described groove is near folder
Concrete end sections are parallel portion, and described parallel portion is consistent with the width of sample (4) parallel-segment, is used for ensureing in sample
(4), in loading process, fixture, sample, pulling force are in parastate.
4. a kind of plate tensile sample stretching clamp according to any one of claim 1-3 is it is characterised in that described groove enters
Row chamfered, to avoid stress concentration.
5. a kind of plate tensile sample stretching clamp according to any one of claim 1-4 is it is characterised in that described clamp body
The material of (3,5) is high intensity nickel-base high-temperature alloy material.
6. the stretching test method of a kind of plate tensile sample stretching clamp any one of application claim 1-5, its feature
It is, the method comprises the steps：
(1) described clamp body (3,5) is passed through pin (2) to connect with tensile testing machine connecting rod (1,6)；
(2) sample (4) is fixed in described clamp body (3,5),
(3), after furnace temperature to be heated is increased to predetermined temperature and stablizes, pretension is carried out to described clamp body (3,5) and sample (4)；
(4) set extensograph parameter, tension test is carried out to described sample (4).
7. a kind of plate tensile sample stretching clamp according to claim 6 it is characterised in that described predetermined temperature be 25 DEG C～
1000℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611071698.1A CN106483019A (en) | 2016-11-29 | 2016-11-29 | A kind of plate tensile sample stretching clamp and its using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611071698.1A CN106483019A (en) | 2016-11-29 | 2016-11-29 | A kind of plate tensile sample stretching clamp and its using method |
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| Publication Number | Publication Date |
|---|---|
| CN106483019A true CN106483019A (en) | 2017-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611071698.1A Pending CN106483019A (en) | 2016-11-29 | 2016-11-29 | A kind of plate tensile sample stretching clamp and its using method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195679A (en) * | 2018-02-11 | 2018-06-22 | 东南大学 | A kind of device and test method for measuring wire rod tiny sample tensile strength |
| CN108680429A (en) * | 2018-03-19 | 2018-10-19 | 北京航空航天大学 | It can online observation and the full structural simulation part drawing by high temperature test fixture for straining pickup |
| CN109738280A (en) * | 2019-01-30 | 2019-05-10 | 东南大学 | A kind of dynamic tensile test fixture and test method for test specimen |
| CN110261224A (en) * | 2019-06-28 | 2019-09-20 | 上海众力投资发展有限公司 | A kind of rubber modulus detection system and method |
| CN111122028A (en) * | 2019-12-20 | 2020-05-08 | 清华大学 | Stress sensor and preparation method thereof |
| CN113984512A (en) * | 2021-10-11 | 2022-01-28 | 中国原子能科学研究院 | Clamping device, fixture and testing machine for compact tensile sample |
| CN114295472A (en) * | 2021-12-30 | 2022-04-08 | 东北大学秦皇岛分校 | Experiment clamp suitable for micro plate-shaped tensile member and use method thereof |
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| CN1619286A (en) * | 2003-11-17 | 2005-05-25 | 中国科学院理化技术研究所 | Stretching clamping device used for nonmetal material stretching mechanics performance testing |
| CN102928288A (en) * | 2012-10-30 | 2013-02-13 | 西南科技大学 | Clamp for tension test |
| CN204758393U (en) * | 2015-06-10 | 2015-11-11 | 重庆材料研究院有限公司 | A centre gripping fixing device for high temperature alloy silk material high temperature tension test |
| CN205333405U (en) * | 2015-12-06 | 2016-06-22 | 江麓机电集团有限公司 | Tensile anchor clamps of short sample |
| CN206248465U (en) * | 2016-11-29 | 2017-06-13 | 华中科技大学 | A kind of plate tensile sample stretching clamp |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619286A (en) * | 2003-11-17 | 2005-05-25 | 中国科学院理化技术研究所 | Stretching clamping device used for nonmetal material stretching mechanics performance testing |
| CN102928288A (en) * | 2012-10-30 | 2013-02-13 | 西南科技大学 | Clamp for tension test |
| CN204758393U (en) * | 2015-06-10 | 2015-11-11 | 重庆材料研究院有限公司 | A centre gripping fixing device for high temperature alloy silk material high temperature tension test |
| CN205333405U (en) * | 2015-12-06 | 2016-06-22 | 江麓机电集团有限公司 | Tensile anchor clamps of short sample |
| CN206248465U (en) * | 2016-11-29 | 2017-06-13 | 华中科技大学 | A kind of plate tensile sample stretching clamp |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195679A (en) * | 2018-02-11 | 2018-06-22 | 东南大学 | A kind of device and test method for measuring wire rod tiny sample tensile strength |
| CN108195679B (en) * | 2018-02-11 | 2020-09-29 | 东南大学 | Device for measuring tensile strength of wire rod micro sample and test method |
| CN108680429A (en) * | 2018-03-19 | 2018-10-19 | 北京航空航天大学 | It can online observation and the full structural simulation part drawing by high temperature test fixture for straining pickup |
| CN108680429B (en) * | 2018-03-19 | 2020-11-03 | 北京航空航天大学 | Structure simulation piece high-temperature tensile test fixture capable of achieving online observation and full strain pickup |
| CN109738280A (en) * | 2019-01-30 | 2019-05-10 | 东南大学 | A kind of dynamic tensile test fixture and test method for test specimen |
| CN110261224A (en) * | 2019-06-28 | 2019-09-20 | 上海众力投资发展有限公司 | A kind of rubber modulus detection system and method |
| CN111122028A (en) * | 2019-12-20 | 2020-05-08 | 清华大学 | Stress sensor and preparation method thereof |
| CN113984512A (en) * | 2021-10-11 | 2022-01-28 | 中国原子能科学研究院 | Clamping device, fixture and testing machine for compact tensile sample |
| CN114295472A (en) * | 2021-12-30 | 2022-04-08 | 东北大学秦皇岛分校 | Experiment clamp suitable for micro plate-shaped tensile member and use method thereof |
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