CN217304618U - Clamp for measuring static elastic modulus and Poisson ratio of graphite material - Google Patents
Clamp for measuring static elastic modulus and Poisson ratio of graphite material Download PDFInfo
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- CN217304618U CN217304618U CN202220080780.5U CN202220080780U CN217304618U CN 217304618 U CN217304618 U CN 217304618U CN 202220080780 U CN202220080780 U CN 202220080780U CN 217304618 U CN217304618 U CN 217304618U
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Abstract
The utility model relates to a clamp for measuring static elastic modulus and Poisson's ratio of graphite material, which comprises a positioning component and a clamping component, wherein the positioning component comprises two groups of positioning frames which are oppositely provided with openings and are used for accommodating the end parts of graphite test pieces; the clamping assembly comprises two groups of clamping sleeves which are fixedly arranged at two power output ends of the tensile testing machine respectively, two groups of mounting blocks which are symmetrically arranged at two sides of the positioning frame and clamp the positioning frame, and a guide assembly which is connected with the two groups of mounting blocks and the positioning frame; the utility model discloses make the locating frame install to an installation piece under the effect of direction subassembly on, later place the tip of graphite test piece in the locating frame, later under the effect of direction subassembly, it is two sets of the installation piece presss from both sides the locating frame tightly, realizes the preliminary fixed of graphite test piece, later with two sets of installation pieces and locating frame put into to carry out the further fixed of graphite test piece in the jacket, solved the fixed loaded down with trivial details technical problem of graphite test piece among the prior art.
Description
Technical Field
The utility model relates to a graphite material check out test set field specifically is an anchor clamps for determining static elastic modulus of graphite material and poisson's ratio.
Background
The various properties exhibited by graphite materials under force are also referred to as mechanical properties. The graphite body deforms under the action of external force, if the deformation does not exceed the elastic limit, the deformation can restore the original shape after the external force is removed, and the performance is called elasticity and represents the parameters of the elasticity of the graphite, such as elastic modulus, Poisson ratio and the like.
A dynamic tensile test clamp and a test method for a countersunk head sheet test piece with the Chinese patent application number of CN201810896206.5 comprise two clamps which are respectively fixed at two ends of the test piece and are symmetrically arranged up and down and have the same structure; the clamp positioned on the upper portion comprises a clamp body and a connecting rod fixed on the center of the top surface of the clamp body and extending upwards, a sample groove which is through from front to back is formed in the bottom surface of the clamp body, screw holes are formed in two sides of the sample groove respectively, a test piece extends into the sample groove, the front and the back of the test piece are filled with cushion blocks matched with the shape of the sample groove respectively, and the surface of the test piece is fixed in the sample groove through screw hole mounting and fixing pieces. The invention is connected with the testing machine through the connecting rod on the clamp, is provided with the sample groove which is through from front to back, fixes the test piece and the clamp body through the filling cushion block with the same assembly size and the matched fixing piece, ensures that the pulling force applied by the testing machine is superposed with the central axis of the clamp, prevents the generation of eccentric bending moment, causes adverse effect on the test result, is suitable for the tensile loading and unloading and fatigue test of various easily-processed and easily-cut materials, and has very wide applicability.
However, when the device is used for installing and fixing a test piece, the position of the cushion block needs to be adjusted to fix the position of the test piece, the cushion block is fixed through the screw, the fixing process consumes long time, and the testing efficiency is affected.
SUMMERY OF THE UTILITY MODEL
In order to the problem, the utility model provides an anchor clamps for surveing static elastic modulus of graphite material and poisson ratio, it is through making the locating frame install to an installation piece under the effect of direction subassembly on, later place the tip of graphite test piece in the locating frame, later under the effect of direction subassembly, it is two sets of the installation piece presss from both sides the locating frame tightly, realizes the preliminary fixed of graphite test piece, later puts into the jacket with two sets of installation pieces and locating frame and carries out the further fixed of graphite test piece, has solved the fixed loaded down with trivial details technical problem of graphite test piece among the prior art.
In order to achieve the above object, the utility model provides a following technical scheme:
a fixture for determining static modulus of elasticity and poisson's ratio of a graphite material, comprising:
the positioning assembly comprises two groups of positioning frames with openings oppositely arranged and used for accommodating the end parts of the graphite test piece; the positioning frame is arranged for closing up;
the clamping assembly comprises two groups of clamping sleeves which are fixedly arranged at two power output ends of the tensile testing machine respectively, two groups of mounting blocks which are symmetrically arranged at two sides of the positioning frame and clamp the positioning frame, and a guide assembly which is connected with the two groups of mounting blocks and the positioning frame; and the two groups of mounting blocks and the positioning frame are correspondingly mounted in the jacket.
As an improvement, the positioning frame comprises a rectangular accommodating area and a conical clamping area; the opening is arranged at one end of the clamping area far away from the accommodating area.
As an improvement, the inner wall of the clamping area is arc-shaped and is attached to the graphite test piece.
As an improvement, the thickness of the graphite test piece is d, and the thickness of the positioning frame is L, so that the relationship between the two is L = d.
As an improvement, the clamping sleeve is provided with an accommodating groove, and the two groups of mounting blocks and the positioning frame are spliced to form a cylinder in clearance fit with the accommodating groove.
As an improvement, the guide assembly comprises two groups of guide rods symmetrically and fixedly mounted on any one of the mounting blocks, guide holes which are in clearance fit with the guide rods and are formed in the other mounting block, and positioning holes which are symmetrically formed in the positioning frame and are in clearance fit with the two groups of guide rods respectively.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses well locating hole wears to establish at the guide bar earlier, and the posting is contradicted with an installation piece earlier, later with the one end card of graphite test piece in the posting, later the guide hole cooperates another installation piece with the guide bar and contradicts with the posting, and then can be quick carry out preliminary fixed to the graphite test piece, the fixed operation of graphite test piece is simple, fixed efficient;
(2) the two groups of mounting blocks and the positioning frame form a cylinder, the cylinder can be prevented from realizing quick centering when being arranged in the accommodating tank, the concentricity of the cylinders on two power ends of the tensile testing machine is ensured, and the testing effect of the graphite test piece during stretching is ensured;
(3) the utility model discloses the thickness of well graphite test piece keeps unanimous with the thickness of locating frame to the profile and the graphite test piece of clamping zone inner wall are hugged closely, and the graphite test piece can not appear rocking when having guaranteed that the graphite test piece carries out drawing, and the fracture position of having guaranteed the graphite test piece is located its midpoint all the time.
To sum up, the utility model has the advantages of simple structure, design benefit, graphite test piece are fixed convenient and graphite test piece is fixed efficient high, are particularly useful for the tensile test of graphite test piece.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 2;
FIG. 4 is a cross-sectional structural view of the positioning frame;
fig. 5 is a sectional structural schematic view of the mounting block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The embodiment is as follows:
as shown in fig. 1 and 2, a jig for measuring static elastic modulus and poisson's ratio of graphite material includes:
the positioning assembly 1 comprises two groups of positioning frames 11, wherein the two groups of openings 110 are oppositely arranged and are used for accommodating the end parts of the graphite test piece; the positioning frame 11 is arranged for closing up;
the clamping assembly 2 comprises two groups of clamping sleeves 21 which are fixedly arranged at two power output ends of the tensile testing machine respectively, two groups of mounting blocks 22 which are symmetrically arranged at two sides of the positioning frame 11 and clamp the positioning frame 11, and a guide assembly 23 which is connected with the two groups of mounting blocks 22 and the positioning frame 11; two sets of the mounting blocks 22 and the positioning frame 11 are correspondingly mounted in the jacket 21.
The tensile testing machine is a conventional one.
Further, the positioning frame 11 includes a receiving area 111 configured as a rectangle and a clamping area 112 configured as a cone; the opening 110 is disposed at an end of the clamping area 112 away from the receiving area 111.
Further, as shown in fig. 4, the inner wall of the clamping area 112 is arc-shaped and is attached to the graphite specimen.
It should be noted that when the end portion of the graphite test piece 3 is clamped in the positioning frame 11, the inner wall of the clamping area 112 is attached to the graphite test piece 3, so as to ensure that the fracture position of the graphite test piece 3 is located at the middle position of the graphite test piece 3 when the graphite test piece 3 is subjected to a tensile test.
Further, as shown in fig. 5, when the thickness of the graphite sample is d and the thickness of the positioning frame 11 is L, the relationship between the two is L = d.
It should be noted that the thickness of the positioning frame 11 is consistent with the thickness of the graphite test piece 3, and when the two sets of the mounting blocks 22 abut against the positioning frame 11, it is ensured that the mounting blocks 22 do not extrude the graphite test piece 3.
It should be noted that the graphite test piece 3 can better fill the containing region 111 and the clamping region 112, and it is ensured that the graphite test piece 3 does not shake when the graphite test piece 3 is stretched.
Furthermore, an accommodating groove 211 is formed in the jacket 21, and the two sets of mounting blocks 22 and the positioning frame 11 are assembled to form a cylinder in clearance fit with the accommodating groove 211.
It should be noted that the area of the mounting block 22 corresponding to the clamping area 112 is a chamfer, and the bottom cylinder thereof is snapped into the receiving groove 211.
It should be further noted that a clamping device is arranged in the accommodating groove 211 to clamp the two sets of mounting blocks 22, so as to achieve quick centering and improve the concentricity of the two ends of the graphite test piece 3.
It is worth mentioning that the clamping device for clamping the mounting block 22 in the receiving groove 211 is the prior art.
Further, as shown in fig. 3, the guiding assembly 23 includes two sets of guiding rods 231 symmetrically and fixedly mounted on any one of the mounting blocks 22, guiding holes 232 correspondingly and in clearance fit with the guiding rods 231 and formed on the other mounting block 22, and positioning holes 233 symmetrically formed on the positioning frame 11 and in clearance fit with the two sets of guiding rods 231, respectively.
It should be noted that the cooperation of the guide rod 231, the guide hole 232 and the positioning hole 233 can increase the assembly speed of the two sets of the mounting blocks 22 and the positioning frame 11, and increase the fixing efficiency of the graphite test piece 3.
It should be noted that, when the tensile testing machine is operated, the two sets of the mounting blocks 22 and the positioning frame 11 are not dislocated, so that the fixture can clamp the graphite test piece 3 more stably.
The working process comprises the following steps:
firstly, the positioning hole 233 is penetrated through the guide rod 231, the positioning frame 11 is abutted against one of the mounting blocks 22, then one end of the graphite test piece 3 is clamped in the accommodating area 111 and the clamping area 112, then the guide hole 232 is matched with the guide rod 231 so that the other mounting block 22 is abutted against the positioning frame 11, the two sets of mounting blocks 22 and the positioning frame 11 preliminarily fix the graphite test piece 3, and the two sets of mounting blocks 22 and the positioning frame 11 form a cylinder, then the cylinder is loaded into the containing groove 211 for fixing, the cylinder is also fixed in the sleeve 11 at the other power output end of the tensile testing machine, and then two power output ends of the tensile testing machine are respectively fixed corresponding to the two ends of the graphite test piece 3, then the tensile testing machine is started, and the deformation quantity of the graphite test piece 3 is measured through a sensor.
Claims (6)
1. A fixture for determining static modulus of elasticity and poisson's ratio of a graphite material, comprising:
the positioning assembly (1) comprises two groups of positioning frames (11) which are provided with openings (110) oppositely and used for accommodating the end parts of the graphite test piece; the positioning frame (11) is arranged for closing up;
the clamping assembly (2) comprises two groups of clamping sleeves (21) which are fixedly arranged at two power output ends of the tensile testing machine respectively, two groups of mounting blocks (22) which are symmetrically arranged at two sides of the positioning frame (11) and clamp the positioning frame (11), and a guide assembly (23) which is connected with the two groups of mounting blocks (22) and the positioning frame (11); the two groups of mounting blocks (22) and the positioning frame (11) are correspondingly mounted in the jacket (21).
2. The jig for determining the static modulus of elasticity and the poisson's ratio of a graphite material according to claim 1, characterized in that the positioning frame (11) comprises a containing area (111) which is arranged in a rectangular shape and a clamping area (112) which is arranged in a conical shape; the opening (110) is arranged at one end of the clamping area (112) far away from the accommodating area (111).
3. The fixture for measuring the static modulus of elasticity and the Poisson's ratio of the graphite material as claimed in claim 2, wherein the inner wall of the clamping area (112) is arc-shaped and is attached to the graphite test piece.
4. The jig for determining the static modulus of elasticity and the poisson's ratio of a graphite material according to claim 2, wherein the graphite specimen has a thickness d, and the positioning frame (11) has a thickness L, and the relationship therebetween is L = d.
5. The fixture for measuring the static elastic modulus and the Poisson's ratio of the graphite material as claimed in claim 1, wherein the jacket (21) is provided with a receiving groove (211), and two sets of the mounting blocks (22) and the positioning frame (11) are spliced to form a cylinder which is in clearance fit with the receiving groove (211).
6. The jig for measuring static elastic modulus and Poisson's ratio of graphite material according to claim 1, wherein the guiding assembly (23) comprises two sets of guiding rods (231) symmetrically and fixedly installed on any one of the installation blocks (22), guiding holes (232) corresponding to the guiding rods (231) and arranged on the other installation block (22) in a clearance fit manner, and positioning holes (233) symmetrically arranged on the positioning frame (11) and respectively arranged in a clearance fit manner with the two sets of guiding rods (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220080780.5U CN217304618U (en) | 2022-01-13 | 2022-01-13 | Clamp for measuring static elastic modulus and Poisson ratio of graphite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220080780.5U CN217304618U (en) | 2022-01-13 | 2022-01-13 | Clamp for measuring static elastic modulus and Poisson ratio of graphite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217304618U true CN217304618U (en) | 2022-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220080780.5U Active CN217304618U (en) | 2022-01-13 | 2022-01-13 | Clamp for measuring static elastic modulus and Poisson ratio of graphite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217304618U (en) |
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2022
- 2022-01-13 CN CN202220080780.5U patent/CN217304618U/en active Active
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Address after: No. 3, Wangfu Road, Wangyuan Town, Yongning County, Yinchuan City, Ningxia Hui Autonomous Region, 750100 Patentee after: Symantec Advanced Materials (Ningxia) Co.,Ltd. Address before: 750101 Building 5, management committee of Wangyuan Industrial Park, Yongning County, Yinchuan City, Ningxia Hui Autonomous Region Patentee before: Sinosteel new material (Ningxia) Co.,Ltd. |