CN113740149B - Clamping device for film tensile test and testing method thereof - Google Patents
Clamping device for film tensile test and testing method thereof Download PDFInfo
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- CN113740149B CN113740149B CN202110987540.3A CN202110987540A CN113740149B CN 113740149 B CN113740149 B CN 113740149B CN 202110987540 A CN202110987540 A CN 202110987540A CN 113740149 B CN113740149 B CN 113740149B
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- accommodating cavity
- supporting rod
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- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000009864 tensile test Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 57
- 238000004804 winding Methods 0.000 claims abstract description 10
- 239000012528 membrane Substances 0.000 claims description 17
- 239000002861 polymer material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims 2
- 238000004378 air conditioning Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 25
- 230000000694 effects Effects 0.000 description 8
- 230000000670 limiting effect Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000013522 software testing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- G01N3/08—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
- 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
A film tensile test clamping device and a testing method thereof, wherein the device comprises: an upper clamp, a lower clamp, a first support bar and a second support bar. The upper fixture is internally provided with a first accommodating cavity and a first fixing piece, the lower fixture is internally provided with a second accommodating cavity and a second fixing piece, the first support rod is inserted into the first accommodating cavity of the upper fixture, and the second support rod is inserted into the second accommodating cavity of the lower fixture. The upper clamp clamps the first support rod through the first fixing piece, and the lower clamp clamps the second support rod through the second fixing piece; the first support rod and the second support rod are used for respectively winding and fixing two ends of a test film material, so that stability in the stretching process and test precision are improved.
Description
Technical Field
The application relates to the field of display, in particular to a tensile test clamping device for a display film material and a test method thereof.
Background
In general material development, it is often necessary to characterize the mechanical properties of a material using a mechanical tensile test in order to determine whether the material monomer characteristics are compliant. For example, for OLED and LCD display modules, most of the materials are polymer films or sheets, and have macro-morphology characteristics of high flatness, smooth surface and the like. When the conventional stretching clamping device is used for testing, the material sample is easily loosened or slipped from the clamp due to the influence of limited contact area, small friction force of a smooth surface and the like, so that the problems of poor test stability, low test precision, incapability of obtaining yield strength and breaking strength due to failure of the material to be broken and the like are caused. The common stretching clamping device has large correlation between the fixing effect and the material type and the surface smoothness, and the controllability of the operation process is low. Therefore, the problems of different materials, such as different stretching effects and testing precision, poor testing stability, failure in breaking of test materials and the like, are solved, in addition, the test process generally needs to repeatedly assemble and disassemble the test sample according to the stretching effects to improve the fixing condition, and when the conventional stretching clamping device is used for testing, the waste sample rate of the test sample is high and the working efficiency is low.
Therefore, improvement of test stability and improvement of test accuracy of conventional tensile clamping devices are urgently needed, and further improvement of working efficiency of tensile test of the test is improved.
Disclosure of Invention
The application aims to provide a film tensile test clamping device and a testing method thereof, which are used for solving the problems that in the prior art, for example, the common tensile clamping device has large correlation between the fixing effect and the material type and the surface smoothness and the operation process has low controllability. Therefore, the problems of different materials, such as different stretching effects and testing precision, poor testing stability, failure in breaking of test materials, and the like, can occur.
In order to solve the above problems, the present application provides a film tensile test clamping device, which is characterized in that the film tensile test clamping device includes: an upper clamp, a lower clamp, a first support bar and a second support bar. The upper clamp is internally provided with a first accommodating cavity and a first fixing piece, the lower clamp is internally provided with a second accommodating cavity and a second fixing piece, the first support rod is inserted into the first accommodating cavity of the upper clamp, and the second support rod is inserted into the second accommodating cavity of the lower clamp. The upper clamp clamps and fixes the first support rod through the first fixing piece, and the lower clamp clamps and fixes the second support rod through the second fixing piece; the first support rod and the second support rod are used for respectively winding and fixing two ends of a test film material, so that stability in the stretching process and test precision are improved.
In some embodiments, the first and second receiving cavities are through holes, respectively.
In some embodiments, the first and second fixing members are bolt fasteners, respectively.
In order to solve the above problems, the present application provides a film tensile test clamping device, comprising: an upper clamp, a lower clamp, a first support bar and a second support bar. The upper fixture is internally provided with a first fixing piece, the lower fixture is internally provided with a second fixing piece, the first supporting rod is fixed on the upper fixture, and the second supporting rod is fixed on the lower fixture. The upper clamp clamps and fixes the first support rod through the first fixing piece, and the lower clamp clamps and fixes the second support rod through the second fixing piece; the first support rod and the second support rod are used for respectively winding and fixing two ends of a test film material, so that stability in the stretching process and test precision are improved.
In some embodiments, a receiving cavity is formed in the upper fixture, the first support rod is inserted into the receiving cavity of the upper fixture, and the second support rod is disposed under the bottom of the lower fixture.
In some embodiments, a receiving cavity is provided in the lower fixture, the first support rod is disposed on top of the upper fixture, and the second support rod is inserted into the receiving cavity of the lower fixture.
In some embodiments, the first support bar is disposed on top of the upper clamp and the second support bar is disposed under a bottom of the lower clamp.
In some embodiments, the receiving cavity is a through hole.
In addition, in order to solve the above problems, the present application provides a testing method of a film tensile testing clamping device, comprising the following steps:
providing a clamping device for clamping a sample to be tested, wherein the clamping device comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp respectively comprise a through hole for accommodating,
providing two support rods which are used for being respectively arranged in the through holes of the upper clamp and the lower clamp, wherein the diameter of the through holes is matched with that of the support rods,
winding the two ends of the film sample for several circles and respectively fixing the film sample on each supporting rod, and
two support rods are inserted into the through holes of the clamping device and are fastened through the first fixing piece and the second fixing piece respectively, and the sample to be tested is pressed and fixed between the clamps and the support rods, so that the stability of the stretching process and the testing precision are improved.
In some embodiments, the first fixing member and the second fixing member are respectively a plurality of bolt fasteners.
The device comprises two key structural parts, namely a clamp or a through hole clamp with through hole characteristics for clamping a sample to be tested and a rod-shaped supporting rod with a limiting function for loading materials. For example, the through hole fixture comprises an upper fixture and a lower fixture, wherein the upper fixture and the lower fixture respectively comprise a containing cavity for containing. The rod-shaped supporting rod is placed. The diameter of the through hole is matched with the diameter of the rod-shaped supporting rod, so that good sealing combination can be realized between the clamp and the supporting rod in the fastening process. For the treatment of the test film or the sample, the test film sample is wound for a plurality of circles by using a sticky tape and fixed on a rod-shaped supporting piece. Such operations are required to be performed at both ends of the test membrane, and the test membrane is dumbbell-shaped after preparation. The processed test membrane material is wound on the support rod, is inserted into the accommodating cavity of the fixture device for fastening treatment, is compacted between the fixtures and the support rod, and achieves the function of double clamping. After the clamp is fastened and closed, the size of the accommodating cavity is limited, and the supporting rods are tightly wrapped, so that the vertical sliding of the test membrane in the clamp in the stretching process is further limited, and the stability and the test precision in the stretching process are improved. And utilize the bracing piece to test the membrane material loading, the operation is simpler and more convenient than traditional mode, and efficiency of software testing is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic side view of a first embodiment of a clamping device for tensile testing of a film material according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a first embodiment of a clamping device for tensile testing of a film material according to an embodiment of the present application;
FIG. 3 is a schematic view of a first support bar and a first support bar combined with a test membrane according to an embodiment of the present application;
FIG. 4 is a schematic view of a first support bar and a first support bar combined with a test membrane according to an embodiment of the present application;
FIG. 5 is a schematic side view of a second embodiment of a clamping device for tensile testing of a film material according to an embodiment of the present application;
FIG. 6 is a schematic side view of a third embodiment of a clamping device for tensile testing of a film material according to an embodiment of the present application.
FIG. 7 is a schematic side view of a fourth embodiment of a clamping device for tensile testing of a film material according to an embodiment of the present application.
FIG. 8 is a flow chart of a method for testing a clamping device for tensile testing of a film material according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
The present application will now be described with reference to specific embodiments, and as shown in fig. 1 to 4, the present application provides a film tensile test clamping device, which is characterized in that the film tensile test clamping device includes: an upper clamp 10, a lower clamp 20, a first support bar 30 and a second support bar 40. The upper fixture 10 is provided with a first accommodating cavity 11 and a first fixing member 12, the lower fixture 20 is provided with a second accommodating cavity 21 and a second fixing member 22, the first support rod 30 is inserted into the first accommodating cavity 11 of the upper fixture 10, and the second support rod 40 is inserted into the second accommodating cavity 21 of the lower fixture 20. Wherein the upper clamp 10 clamps and fixes the first support bar 30 through the first fixing member 12, and the lower clamp 20 clamps and fixes the second support bar 40 through the second fixing member 22; the first support rod 30 and the second support rod 40 are respectively used for winding and fixing two ends of a test film 50, so as to solve the problems of high relevance between the fixing effect and the material type of the conventional stretching and clamping device and the smoothness of the surface in the prior art, and low controllability in the operation process. Therefore, the problems of different materials, such as different stretching effects and testing precision, poor testing stability, failure of the tested materials to be broken and the like, are solved. In other words, the application provides a stretching clamp device and a testing method, which comprises a clamp with through hole characteristics for clamping a sample to be tested, a rod-shaped supporting rod with a load material limiting function and the like. The tensile test is completed after fastening by winding the material, adhesively securing it to, for example, a rod-shaped support bar, placing it in the receiving cavity of a through-hole fixture. The device or the method can solve the problem that the sample is easy to loose and slide in two aspects, namely, the interface friction is increased for improving the contact area, and the movement limit is increased for preventing the sample from sliding. The application can effectively solve the problems that when the conventional stretching clamp device is used for testing the smooth diaphragm material, a material sample is easy to loose and slip from the clamp, so that the test stability is poor, the test precision is low, the yield strength and the breaking strength cannot be obtained due to failure in breaking the material, and the like.
In some embodiments, the first accommodating cavity 11 and the second accommodating cavity 21 are through holes respectively.
In some embodiments, the first and second securing members 12, 22 are each bolt fasteners.
In addition, as shown in fig. 5 to 7, the present application provides a film tensile test clamping device, which is characterized in that the film tensile test clamping device includes: an upper clamp 10, a lower clamp 20, a first support bar 30 and a second support bar 40. The upper fixture 10 is provided with a first fixing member 12, the lower fixture 20 is provided with a second fixing member 22, the first support rod 30 is fixed on the upper fixture 10, and the second support rod 40 is fixed on the lower fixture 20. Wherein the upper clamp 10 clamps and fixes the first support bar 30 through the first fixing member 12, and the lower clamp 20 clamps and fixes the second support bar 40 through the second fixing member 22; the first support bar 30 and the second support bar 40 are respectively used for winding and fixing two ends of a test film 50, so as to improve stability of the stretching process and test accuracy.
As shown in fig. 7, in some embodiments, a receiving cavity 11 is provided in the upper fixture 10, the first support rod 30 is inserted into the receiving cavity 11 of the upper fixture 10, and the second support rod 40 is disposed under the bottom of the lower fixture 20.
As shown in fig. 6, in some embodiments, a receiving cavity 21 is provided in the lower fixture 20, the first support rod 30 is disposed on top of the upper fixture 10, and the second support rod 40 is inserted into the receiving cavity 21 of the lower fixture 20.
In some embodiments, as shown in fig. 5, the first and second fixing members 12 and 22 are each a bolt fastener. The first support bar 30 is disposed on the top of the upper jig 10, and the second support bar 40 is disposed under the bottom of the lower jig 20.
In some embodiments, the receiving cavities 11, 21 may be through holes.
In addition, as shown in the flowchart of fig. 8, the application provides a testing method of a film tensile testing clamping device, which comprises the following steps:
s10: providing a clamping device for clamping a sample to be tested, wherein the clamping device comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp respectively comprise a through hole for accommodating,
s20: providing two support rods which are used for being respectively arranged in the through holes of the upper clamp and the lower clamp, wherein the diameter of the through holes is matched with that of the support rods,
s30: winding the two ends of the film sample for several circles and respectively fixing the film sample on each supporting rod, and
s40: two support rods are inserted into the through holes of the clamping device and are fastened by the first fixing piece and the second fixing piece respectively, and the sample to be tested is pressed and fixed between the clamps and the support rods.
In some embodiments, the first fixing member and the second fixing member are respectively a plurality of bolt fasteners.
In other words, the device of the application mainly comprises two key structural members, namely a through hole clamp for clamping a sample to be tested and a rod-shaped supporting rod for limiting load materials. The clamp comprises an upper clamp and a lower clamp, wherein the upper clamp and the lower clamp respectively comprise a containing cavity for containing. The function of the rod-shaped support rod is achieved by the device according to the application in three embodiments, one of which is shown in fig. 1. The diameter of the accommodating cavity is matched with the diameter of the rod-shaped supporting rod, so that good sealing combination can be realized between the clamp and the supporting rod in the fastening process. The support rod piece is a cylinder, and rubber or polymer materials with certain elastoplasticity are selected as materials, so that the stress condition of the surface of the material sample can be adjusted through micro deformation in the fastening process, and the material is not damaged. The width of the support should be greater than the width of the material sample, preferably 3-10 times the width of the material. For sample handling, the film sample is wrapped several times with glue or other fixing means and fixed on a rod-like support. Such operation is needed at both ends of the material sample, the sample is dumbbell-shaped after preparation, as shown in fig. 3, the processed sample is wound on the support rod, and is inserted into the through hole of the clamp device for fastening treatment, and the sample is compacted between the clamps and the support rod, so that the double clamping effect is realized. After the clamp is fastened and closed, the size of the accommodating cavity is limited, and the supporting rods are tightly wrapped, so that the vertical sliding of the material in the clamp in the stretching process is further limited, and the stability and the testing precision in the stretching process are improved. And the supporting rod is used for sample feeding, so that the operation is simpler and more convenient than the traditional mode, and the testing efficiency is higher.
As shown in fig. 5, in the second embodiment, the rod-shaped support rod is matched with the square clamp, and the sliding behavior of the material sample is reduced by means of the limiting action of the rod-shaped support rod and the upper end face and the lower end face of the clamp, so that the problems of stretching, sample removing and sample sliding are solved. As shown in fig. 6, in the third embodiment, the rod-shaped support rod is used to match the upper square clamp and the lower through hole clamp, and the sliding behavior of the material sample is reduced by the limiting action of the rod-shaped support rod and the upper end surface of the clamp and the friction increasing method of the lower through hole clamp, so that the problems of stretching, sample removing and sample sliding are solved.
As shown in fig. 7, in the fourth embodiment, the rod-shaped support rod is matched with the lower square clamp and the upper through hole clamp, and the sliding behavior of the material sample is reduced by means of the limiting action of the rod-shaped support rod and the lower end face of the clamp and the friction force increasing method of the upper through hole clamp, so that the problems of stretching, sample removing and sample sliding are solved. The experiment verification is completed in the above embodiment, and the length deformation value of the test area before and after the experiment and the displacement value fed back by the sensor of the stretching device are compared to confirm that the length deformation value and the displacement value are consistent with the data at the 0.1mm precision level, so that the material sample is proved to have no slippage in the stretching process. Under repeated tests, the material sample is successfully broken in the stretching process, so that the test data of related materials such as the elastic modulus, the yield strength, the breaking strength and the like of the material can be expected, and the stability and the testing precision of the stretching process can be effectively improved.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing has described in detail embodiments of the present application, and specific examples have been employed herein to illustrate the principles and embodiments of the present application, the above description of the embodiments being only for the purpose of aiding in the understanding of the technical solution and core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. The utility model provides a membrane material tensile test clamping device which characterized in that is applied to the test the modulus of elasticity, yield strength and the breaking strength of membrane material, the membrane material is the display membrane material, membrane material tensile test clamping device includes:
the upper clamp is internally provided with a first accommodating cavity and a first fixing piece and is used for clamping the first supporting rod;
the lower clamp is internally provided with a second accommodating cavity and a second fixing piece and is used for clamping the second supporting rod;
the first supporting rod is inserted into the first accommodating cavity of the upper clamp, and the diameter of the first accommodating cavity is matched with that of the first supporting rod;
the second supporting rod is inserted into the second accommodating cavity of the lower clamp, and the diameter of the second accommodating cavity is matched with that of the second supporting rod;
wherein the first accommodating cavity and the second accommodating cavity are through holes respectively;
the first support rod and the second support rod are cylinders made of elastic plastic rubber or polymer materials, the upper clamp clamps and fixes the first support rod through the first fixing piece, the lower clamp clamps and fixes the second support rod through the second fixing piece, and the first fixing piece and the second fixing piece are respectively provided with a plurality of bolt fasteners; a kind of electronic device with high-pressure air-conditioning system
The first support rod and the second support rod are used for respectively winding and fixing two ends of a test film material.
2. The membrane tensile test clamping device of claim 1, wherein the first support bar is fixed to the upper clamp and the second support bar is fixed to the lower clamp.
3. The membrane tensile test clamping device according to claim 2, wherein a containing cavity is arranged in the upper clamp, the first supporting rod is inserted into the containing cavity of the upper clamp, and the second supporting rod is arranged below the bottom of the lower clamp.
4. The membrane tensile test clamping device according to claim 2, wherein a containing cavity is formed in the lower clamp, the first supporting rod is arranged on the top of the upper clamp, and the second supporting rod is inserted into the containing cavity of the lower clamp.
5. The membrane tensile test clamping device of claim 2, wherein the first support bar is disposed on top of the upper clamp and the second support bar is disposed under the bottom of the lower clamp.
6. The tensile testing clamping device of a membrane material according to claim 3 or 4, wherein the accommodating cavity is a through hole.
7. The testing method of the film tensile testing clamping device is characterized by being applied to testing the elastic modulus, the yield strength and the breaking strength of the film, wherein the film is a display film, and comprises the following steps of:
providing a clamping device for clamping a sample to be tested, wherein the clamping device comprises an upper clamp and a lower clamp, and the upper clamp and the lower clamp respectively comprise a through hole for accommodating;
providing two support rods which are used for being respectively arranged in through holes of the upper clamp and the lower clamp, wherein the diameter of the through holes is matched with that of the support rods, and the two support rods are cylinders made of elastic plastic rubber or polymer materials;
winding the two ends of the film sample for several circles and respectively fixing the film sample on each supporting rod, and
inserting two support rods into the through holes of the clamping device, respectively fastening the two support rods through a first fixing piece and a second fixing piece, and tightly pressing and fixing the sample to be tested between the clamps and the support rods;
the first fixing piece and the second fixing piece are respectively a plurality of bolt fasteners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987540.3A CN113740149B (en) | 2021-08-26 | 2021-08-26 | Clamping device for film tensile test and testing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987540.3A CN113740149B (en) | 2021-08-26 | 2021-08-26 | Clamping device for film tensile test and testing method thereof |
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| Publication Number | Publication Date |
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| CN113740149A CN113740149A (en) | 2021-12-03 |
| CN113740149B true CN113740149B (en) | 2023-11-28 |
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| CN114577610B (en) * | 2022-04-06 | 2022-08-16 | 安徽省通达新材料有限公司 | Device and method for detecting tensile strength performance of packaging film |
| CN116448590B (en) * | 2023-06-08 | 2023-08-25 | 华北科技学院 | Clamp assembly, test device and test method for sheet high-temperature tensile test |
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