CN213337048U - Extensometer fulcrum installation limiting plate - Google Patents
Extensometer fulcrum installation limiting plate Download PDFInfo
- Publication number
- CN213337048U CN213337048U CN202022572253.XU CN202022572253U CN213337048U CN 213337048 U CN213337048 U CN 213337048U CN 202022572253 U CN202022572253 U CN 202022572253U CN 213337048 U CN213337048 U CN 213337048U
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- CN
- China
- Prior art keywords
- extensometer
- needle groove
- contact pin
- limiting plate
- fulcrum
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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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- 238000009434 installation Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 abstract description 20
- 238000006073 displacement reaction Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000012528 membrane Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 238000009864 tensile test Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model discloses an extensometer fulcrum installation limiting plate relates to membrane structure detection technology for when measuring the membrane material and meeting an emergency, the supplementary initial interval of injecing the fulcrum of extensometer, this limiting plate has preceding needle groove and back needle groove, this preceding needle groove is parallel to each other with this back needle groove, and the opening in this preceding needle groove and this back needle groove is located the same limit of this limiting plate, contact pin and back contact pin before this extensometer's two fulcrum department has been installed respectively, this preceding contact pin of extensometer leans on locating this preceding needle groove bottom, this back contact pin is by locating this back needle groove bottom. Because the utility model discloses a parallel grooved structural style on one side of limiting plate, the contact pin on this extensometer leans on establishing in needle groove bottom to can realize the fixed of contact pin position on the fulcrum of extensometer when fixing the contact pin on the extensometer to the test piece, prevent that extensometer fulcrum displacement from taking place random variation, make the gauge length of strain measurement set for more accurately, thereby guarantee better that strain measures the conversion precision.
Description
Technical Field
The utility model relates to a membrane structure detects technical field, more specifically, relates to an extensometer fulcrum installation limiting plate.
Background
The biaxial tension test is a method for measuring the elastic stress-strain relation characteristic of film material, and is characterized by that in the test a cross-shaped tension test piece is made up by using film material, and the end portions of its four limbs are fixed on the clamps of tension arm, and the test piece is tensioned, and the correspondent stress and local displacement are recorded, and further the gauge length and local displacement are used to convert them into correspondent strain.
The extensometer is an instrument for measuring the line deformation between two points of an object, can be used for measuring the local displacement of a test piece in biaxial tensile test, connects and fixes the fulcrum of the extensometer on a test datum point of the test piece, so that the fulcrum can move correspondingly along with the local deformation of the test piece, reads and records the displacement reading of the extensometer at each moment, and the strain of the test piece can be obtained through conversion.
In order to measure the strain of the film material by using the extensometer, the fulcrum distance of the extensometer needs to be determined in an initial state and used as the calculation gauge length of the strain of the test piece, so that an accurate result can be obtained in the calculation of the strain of the test piece.
In the prior art, in order to determine the displacement gauge length of the extensometer in the biaxial tensile test, a fulcrum of the extensometer needs to be accurately and fixedly connected to a gauge length reference point of a tensile test piece.
The above-mentioned prior art has obtained the mounting method of the extensometer, which can keep the relative position between the fulcrum of the extensometer and the corresponding measuring reference point on the test piece unchanged, and make the measured deformation data of the test piece more stable, but has the following disadvantages: among the above-mentioned prior art, when fixing the contact pin on the extensometer to the test piece, because manual operation factor causes can't guarantee that the last contact pin of extensometer accurate alignment scale distance datum point on the test piece to make the initial distance between the contact pin have the error, make measurement accuracy reduce.
Disclosure of Invention
In view of exist not enough among the above-mentioned prior art, the utility model discloses aim at solving/overcoming the above-mentioned problem that the installation positioning accuracy that exists when installing the extensometer on the test piece in biax tensile test reduces, an installation limiting plate is provided, carry out assistance-localization real-time to its fulcrum when being connected to the test piece with the extensometer, inject the contact pin interval of extensometer, and regard the calibration value of installing the limiting plate as the displacement scale distance that corresponds, this extensometer fulcrum installation limiting plate can prevent that extensometer fulcrum displacement from taking place random variation, make the settlement of strainometry scale distance more accurate, thereby guarantee the strainometry conversion precision better.
In order to realize the above object, the utility model provides an extensometer fulcrum installation limiting plate for when measuring the meeting an emergency of membrane material, inject the initial interval of the fulcrum of extensometer, this limiting plate has preceding needle groove and back needle groove, this preceding needle groove is parallel to each other with this back needle groove, and the opening in this preceding needle groove and this back needle groove is located the same limit of this limiting plate, preceding contact pin and back contact pin have been installed respectively to two branch punishment departments of this extensometer, this preceding contact pin of this extensometer is by locating this preceding needle bottom of groove, this back contact pin of this extensometer is by locating this back needle bottom of groove.
Like this, lean on the position through the preceding contact pin with this extensometer to establish at the preceding needle inslot of this limiting plate, lean on the position of the back contact pin of this extensometer to establish at the back needle groove bottom of this limiting plate, restricted the interval of this preceding contact pin and back contact pin through this preceding needle groove and this back needle groove to the interval of this preceding needle groove and this back needle groove has been guaranteed through the processing of this limiting plate, further provides the assurance for the interval setting of this preceding contact pin and back contact pin.
As a preferred embodiment, the width of the front needle groove is adapted to the diameter of the front pin of the extensometer, the width of the rear needle groove is adapted to the diameter of the rear pin of the extensometer, and the depth of the front needle groove and the rear needle groove are the same. Therefore, the gap between the front contact pin and the front needle groove and the gap between the rear contact pin and the rear needle groove can be eliminated, and the mounting size precision of the extensometer is further ensured.
In a preferred embodiment, the position-limiting plate has a plurality of the front needle grooves and a plurality of the rear needle grooves, the front needle grooves are parallel to each other and have the same shape and size, and the rear needle grooves are parallel to each other and have the same shape and size. Therefore, the front needle groove corresponding to the front contact pin of the extensometer on the limiting plate or the rear needle groove corresponding to the rear contact pin of the extensometer on the limiting plate can be switched according to requirements, so that the fulcrum distance of the extensometer is changed according to the requirements of tests.
Further, the spacing between the front needle grooves is the same, the spacing between the rear needle grooves is the same, and the spacing between the front needle grooves is different from the spacing between the rear needle grooves. Therefore, the limiting plate can provide more fulcrum distance options and is convenient to convert.
In a preferred embodiment, the opposite sides of the open sides of the front needle groove and the rear needle groove of the position limiting plate are provided with folded edges. On the one hand can be when installing this extensometer like this, will just can install and demolish this limiting plate to this limiting plate through holding this hem, make the operation more convenient.
Because the utility model discloses a parallel grooved structural style on one side at the limiting plate to can realize the fixed of contact pin position on the fulcrum of extensometer, prevent that extensometer fulcrum displacement from taking place random variation, make the gauge length of strain measurement set for more accurate, thereby guarantee the strain measurement conversion precision better.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
as shown in fig. 1, the schematic diagram of an embodiment of the extensometer fulcrum mounting limiting plate of the present invention is shown;
as shown in fig. 2, which is a front view of an embodiment of the extensometer fulcrum mounting limit plate of the present invention;
as shown in fig. 3, it is the installation schematic diagram of an embodiment of the extensometer fulcrum installation limiting plate of the present invention.
The correspondence between reference numerals and part names as shown in the figures is:
1-limit board, 11-front needle groove, 12-back needle groove, 13-folding edge, 2-extensometer, 21-front needle insertion, 22-back needle insertion
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, a more complete description of the present invention is provided below in conjunction with the following detailed description and accompanying drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Example 1
As shown in fig. 1 and 2, the preferred embodiment of the present invention is an extensometer fulcrum mounting limiting plate, where the limiting plate 1 has 3 front needle grooves 11 and 3 rear needle grooves 12, the openings of the front needle grooves 11 and the rear needle grooves 12 are located on the same side of the limiting plate 1, the widths of the front needle grooves 11 and the rear needle grooves 12 are both 1mm, the depth is 10.5mm, the 3 front needle grooves 11 and the 3 rear needle grooves 12 are all parallel to each other, the interval between the front needle grooves 11 is 4.75mm, the interval between the rear needle grooves is 3.75mm, and the interval between the front needle grooves 11 and the rear needle grooves 12 is 28.5 mm. The opposite sides of the opening sides of the front needle groove 11 and the rear needle groove 12 are provided with folding edges 13, and the height of the folding edges 13 is 15 mm.
When specifically using, the utility model discloses a theory of operation and working process are shown as figure 3: a front pin 21 and a rear pin 22 are respectively arranged at two branch points of the extensometer 2, the diameter of the front pin 21 and the diameter of the rear pin 22 are both 1mm, and the length of the front pin 21 and the length of the rear pin 22 are 15 mm. Before installing extensometer 2, lean on this preceding contact pin 21 of this extensometer 2 to locate preceding needle groove 11 bottom, this back contact pin 22 of this extensometer 2 leans on to locate this back needle groove 12 bottom, restrict this preceding contact pin 21 of this extensometer 2 and this back contact pin 22 this between axle center phase moment for 40mm, then insert the strain test point of biaxial tensile test piece simultaneously with this preceding contact pin 21 of this extensometer 2 and this back contact pin 22, make this limiting plate 1 bottom surface and the laminating of biaxial tensile test piece, then take out between this extensometer 2 and the biaxial tensile test piece, and further push down this extensometer 2, after the bottom surface and the laminating of this biaxial tensile test piece surface of this extensometer 2, can start biaxial tensile test.
To sum up, adopt in the biax tensile test the utility model discloses a preferred embodiment can make the contact pin interval of installing on the fulcrum fix at known displacement value effectively when installing the extensometer on the tensile test piece of biax, prevents that the fulcrum position of extensometer from taking place random variation, makes the gauge length of strain measurement set for more accurately to guarantee the strain measurement conversion precision better.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; in the description of the present invention, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the present invention, and modifications, equivalent replacements and improvements can be made to the above-described embodiment by those skilled in the art within the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an extensometer fulcrum installation limiting plate, the installation interval of the fulcrum of injeciton (2) is injeciton, a serial communication port, limiting plate (1) has preceding needle groove (11) and back needle groove (12), preceding needle groove (11) with back needle groove (12) are parallel to each other, just preceding needle groove (11) with the opening of back needle groove (12) is located the same limit of limiting plate (1), preceding contact pin (21) and back contact pin (22) have been installed respectively to the two fulcrum departments of extensometer (2), extensometer (2) preceding contact pin (21) lean on to locate preceding needle groove (11) bottom, extensometer (2) back contact pin (22) lean on to locate back needle groove (12) bottom.
2. An extensometer fulcrum mounting limiting plate according to claim 1, characterized in that the width of the front needle groove (11) is adapted to the diameter of the front pin (21) of the extensometer (2), the width of the rear needle groove (12) is adapted to the diameter of the rear pin (22) of the extensometer (2), and the depth of the front needle groove (11) and the rear needle groove (12) are the same.
3. An extensometer fulcrum mounting limiting plate according to claim 1, characterized in that there are a plurality of the front needle grooves (11) and a plurality of the rear needle grooves (12), the plurality of front needle grooves (11) are parallel to each other and have the same shape and size, and the plurality of rear needle grooves (12) are parallel to each other and have the same shape and size.
4. An extensometer fulcrum mounting limiting plate according to claim 3, characterized in that the pitch between the plurality of front needle grooves (11) is the same, the pitch between the plurality of rear needle grooves (12) is the same, and the pitch between the plurality of front needle grooves (11) is different from the pitch between the plurality of rear needle grooves (12).
5. An extensometer fulcrum mounting limit plate according to claim 1, characterized in that the opposite sides of the open sides of the front needle groove (11) and the rear needle groove (12) have folded edges (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022572253.XU CN213337048U (en) | 2020-11-13 | 2020-11-13 | Extensometer fulcrum installation limiting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022572253.XU CN213337048U (en) | 2020-11-13 | 2020-11-13 | Extensometer fulcrum installation limiting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213337048U true CN213337048U (en) | 2021-06-01 |
Family
ID=76077494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022572253.XU Expired - Fee Related CN213337048U (en) | 2020-11-13 | 2020-11-13 | Extensometer fulcrum installation limiting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213337048U (en) |
-
2020
- 2020-11-13 CN CN202022572253.XU patent/CN213337048U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210601 |