Tensile experiment device and tensile experiment machine
By designing a tensile experimental device with a limiting axis, the test sample alignment problem in the high-speed tensile experiment in the prior art medium and high-speed tensile experiment is solved, and the reliability of the experiment and the accuracy of the data are improved.
Patent Information
- Application Number
- CN202421549330.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The tensile experimental device in the existing tensile experimental machine cannot automatically adjust the test sample when conducting high-speed tensile experiments, resulting in inaccurate experimental results.
A tensile experimental device is designed, including a first clamp and a second clamp, arranged oppositely in the first direction, and has a limiting axis extending in the second direction. Through these limiting axes, the sample is penetrated to ensure that the sample is parallel to the first direction, thereby reducing experimental errors.
The effect of the sample being parallel to the first direction is achieved, the errors in the experiment are reduced, and the reliability of high-speed tensile experiments and the accuracy of experimental data are improved.
Smart Images
Figure CN222938877U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tensile testing, in particular to a tensile testing device and a tensile testing machine with the tensile testing device. Background Art
[0002] In the related art, when materials are applied to working conditions with high-speed deformation, it is necessary to consider the strain rate sensitivity of the materials in order to better select and use materials. High-speed tensile testing is a conventional test for evaluating the strain rate sensitivity of materials. The tensile testing device in the existing tensile testing machine cannot automatically center the specimen during high-speed tensile testing, which affects the test results. Summary of the Utility Model
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a tensile testing device, which can achieve the effect that the specimen is parallel to the first direction, reduce the errors generated in the test, is beneficial to improving the reliability of high-speed tensile testing, and enhance the accuracy of test data.
[0004] The utility model also provides a tensile testing machine using the above tensile testing device.
[0005] The tensile testing device according to the first aspect embodiment of the present application includes: a first fixture and a second fixture, the first fixture and the second fixture are oppositely arranged along a first direction, both the first fixture and the second fixture are used for being assembled with the tensile testing machine, both the first fixture and the second fixture are used for clamping the specimen, the first fixture has a first limiting shaft extending along a second direction, the second fixture has a second limiting shaft extending along the second direction, along the first direction, the central axes of the first limiting shaft and the second limiting shaft are oppositely arranged, and both the first limiting shaft and the second limiting shaft are used for passing through the specimen, wherein the first direction and the second direction are perpendicular to each other.
[0006] The tensile testing device according to the embodiment of the present application can achieve the effect that the specimen is parallel to the first direction, reduce the errors generated in the test, is beneficial to improving the reliability of high-speed tensile testing, and enhance the accuracy of test data.
[0007] According to some embodiments of the present utility model, the first fixture includes: a first fixture body, a first clamping plate and a second clamping plate. The first fixture body forms a first installation space. Along the second direction, one side of the first installation space is open to form a first clamping plate assembly opening, and along the first direction, the end of the first installation space facing the second fixture is open to form a specimen assembly opening. The first clamping plate and the second clamping plate are adapted to be assembled in the first installation space and arranged along the second direction. The first limiting shaft is fixedly provided on the surface of the first clamping plate facing the second clamping plate. The first clamping plate and the second clamping plate cooperate to clamp the specimen piece.
[0008] According to some embodiments of the present utility model, along the second direction, the first fixture body has a first side wall opposite to the first clamping plate assembly opening. When the first clamping plate and the second clamping plate clamp the specimen piece, the first limiting shaft penetrates through the second clamping plate and the first side wall.
[0009] According to some embodiments of the present utility model, the first side wall and the second clamping plate both form assembly holes, and the first limiting shaft penetrates through the assembly hole of the second clamping plate and the assembly hole of the first side wall.
[0010] According to some embodiments of the present utility model, the first fixture further includes: a locking member. The locking member forms a threaded hole, and an external thread is formed on the peripheral wall of the first limiting shaft. When the first limiting shaft penetrates through the second clamping plate and the first side wall, the locking member is sleeved on the first limiting shaft and is in threaded fit connection with the first limiting shaft, and the locking member is adapted to abut against the first side wall.
[0011] According to some embodiments of the present utility model, at least one of the surface of the first clamping plate facing the second clamping plate and the surface of the second clamping plate facing the first clamping plate forms a friction structure.
[0012] According to some embodiments of the present utility model, the tensile testing device further includes: a force sensor, and the force sensor is fixedly provided on at least one of the first fixture and the second fixture.
[0013] According to some embodiments of the present utility model, the force sensor is a strain gauge.
[0014] According to some embodiments of the present utility model, the first fixture and the second fixture have the same structure.
[0015] The tensile testing machine according to the second aspect embodiment of the present utility model includes the tensile testing device described in the above embodiments.
[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings
[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0018] Figure 1 is a schematic diagram of the stretching test device and the specimen assembled according to an embodiment of the present application;
[0019] Figure 2 is a top view of the stretching test device according to an embodiment of the present application;
[0020] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in
[0021] Figure 4 is a schematic diagram of the specimen according to an embodiment of the present application;
[0022] Figure 5 is a schematic diagram of the first clamping plate according to an embodiment of the present application;
[0023] Figure 6 is a schematic diagram of the second clamping plate according to an embodiment of the present application.
[0024] Reference Signs:
[0025] Stretching test device 100,
[0026] First fixture 10, first fixture body 11, first installation space 111, first clamping plate assembly port 1111, first side wall 112, first bottom wall 113, first clamping plate 12, first limiting shaft 121, second clamping plate 13, first connecting portion 14,
[0027] Second fixture 20, second fixture body 21, second installation space 211, second clamping plate assembly port 2111, second side wall 212, third clamping plate 22, second limiting shaft 221, fourth clamping plate 23, second connecting portion 24,
[0028] Specimen assembly port 31, assembly hole 32, friction structure 33,
[0029] Force sensor 40,
[0030] Specimen 200, first positioning hole 210, second positioning hole 220. Detailed Embodiments
[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0032] Reference below Figures 1-6 The tensile testing device 100 according to the embodiment of the present invention is described. The tensile testing device 100 can be installed on a tensile testing machine, which can be used to perform high-speed tensile tests to detect the strain rate sensitivity of the material, so as to better select materials under high-speed deformation conditions.
[0033] According to the tensile test device 100 of the first embodiment of the utility model, Figures 1-4 As shown, the tensile test device 100 may include: a first clamp 10 and a second clamp 20, the first clamp 10 and the second clamp 20 are arranged relatively to each other along the first direction, the first clamp 10 and the second clamp 20 are both used to cooperate with the tensile testing machine for assembly, the first clamp 10 and the second clamp 20 are both used to clamp the sample 200, the first clamp 10 has a first limiting axis 121 extending along the second direction, the second clamp 20 has a second limiting axis 221 extending along the second direction, the central axis of the first limiting axis 121 and the central axis of the second limiting axis 221 are arranged relatively to each other along the first direction, the first limiting axis 121 and the second limiting axis 221 are both used to penetrate the sample 200, wherein the first direction and the second direction are perpendicular to each other.
[0034] It should be noted that in the related art, the high-speed tensile test is a conventional test for evaluating the strain rate sensitivity of materials. The tensile test device in the existing tensile testing machine cannot automatically center the specimen during the high-speed tensile test, which affects the test results.
[0035] Based on this, the embodiment of the present application proposes a tensile test device 100, the first clamp 10 can be made of an alloy such as aluminum alloy, titanium alloy and stainless steel, and the second clamp 20 can be made of an alloy such as aluminum alloy, titanium alloy and stainless steel, so that the first clamp 10 and the second clamp 20 have the advantages of high strength, good rigidity, not easy to deform and wear resistance. The first clamp 10 and the second clamp 20 are arranged relative to each other along a first direction. When the tensile test device 100 is as shown in FIG. Figure 3 When setting the direction, the first direction is Figure 3in the Z direction. The first fixture 10 can be assembled with a tensile testing machine. The first fixture 10 can be formed with a first connecting portion 14, and the first connecting portion 14 can be assembled with the actuating cylinder of the tensile testing machine by means of thread fitting, bolt connection, etc., so as to achieve the effect that the actuating cylinder of the tensile testing machine drives the first fixture 10 to move along the first direction. The second fixture 20 can be assembled with the tensile testing machine. The second fixture 20 can be formed with a second connecting portion 24, and the second connecting portion 24 can be connected to the fixed workbench of the tensile testing machine by means of thread fitting, bolt connection, etc. The second fixture 20 can be stationary relative to the tensile testing machine. Both the first fixture 10 and the second fixture 20 are used for clamping the specimen 200. The specimen 200 can be arranged between the first fixture 10 and the second fixture 20. The first fixture 10 and the second fixture 20 jointly clamp the specimen 200. The first fixture 10 and the second fixture 20 can move relative to each other along the first direction, so as to achieve the effect that the tensile testing device 100 stretches the specimen 200 along the first direction, and further complete the high-speed tensile test of the specimen 200, thereby measuring the strain rate sensitivity of the specimen 200.
[0036] The first fixture 10 has a first limiting shaft 121 extending in the second direction, and the second fixture 20 has a second limiting shaft 221 extending in the second direction. When the tensile testing device 100 is arranged as Figure 3 in the direction, the second direction is Figure 3 the X direction in, and the first direction is perpendicular to the second direction. Along the first direction, the central axes of the first limiting shaft 121 and the second limiting shaft 221 are oppositely arranged. It can also be understood that along the first direction, the projections of the central axes of the first limiting shaft 121 and the second limiting shaft 221 coincide. Both the first limiting shaft 121 and the second limiting shaft 221 can pass through the specimen 200, and both the first limiting shaft 121 and the second limiting shaft 221 can play a role in limiting the specimen 200. As Figure 4 shown, along the length direction of the specimen 200, a first positioning hole 210 and a second positioning hole 220 are formed on the specimen 200. The first positioning hole 210 and the second positioning hole 220 are oppositely arranged and spaced apart along the length direction of the specimen 200. Along the first direction, the central axes of the first positioning hole 210 and the second positioning hole 220 are oppositely arranged. The first positioning hole 210 and the second positioning hole 220 are respectively located at positions close to both ends of the specimen 200, and both the first positioning hole 210 and the second positioning hole 220 penetrate through the specimen 200.
[0037] When the first fixture 10 and the second fixture 20 clamp the specimen 200, the first limiting shaft 121 passes through the first positioning hole 210, and the first limiting shaft 121 can abut against and be limited by the inner wall of the first positioning hole 210. The second limiting shaft 221 passes through the second positioning hole 220, and the second limiting shaft 221 can abut against and be limited by the inner wall of the second positioning hole 220. The first limiting shaft 121 can achieve the effect of fixing the specimen 200, and the second limiting shaft 221 can achieve the effect of fixing the specimen 200. Thus, the probability of the specimen 200 sliding or shifting can be reduced, and the stability of the specimen 200 assembled on the tensile test device 100 can be improved. And when the specimen 200 is assembled with the tensile test device 100, the first limiting shaft 121 and the second limiting shaft 221 arranged oppositely in the first direction are respectively assembled in the first positioning hole 210 and the second positioning hole 220, which can achieve the effect of aligning the two ends of the specimen 200 in the first direction. The specimen 200 is parallel to the first direction, the specimen 200 is arranged in the first direction, the first fixture 10 and the second fixture 20 stretch the specimen 200 in the first direction, and the specimen 200 is stressed in the direct tension direction. The probability of errors caused by incorrect arrangement of the specimen 200 can be reduced, which is beneficial to improving the reliability of the high-speed tensile test and enhancing the accuracy of the experimental data. And by standardizing the first positioning hole 210 and the second positioning hole 220 on the specimen 200, the effect of aligning the two ends of each specimen 200 in the first direction can be achieved when each specimen 200 is assembled on the tensile test device 100, which is beneficial to improving the reliability of the experiment.
[0038] In some embodiments of the present utility model, as Figure 3 and Figure 6 shown, the first fixture 10 may include: a first fixture body 11, a first clamping plate 12 and a second clamping plate 13. The first fixture body 11 forms a first installation space 111. One side of the first installation space 111 is open along the second direction to form a first clamping plate assembly port 1111, and the end of the first installation space 111 facing the second fixture 20 is open along the first direction to form a specimen assembly port 31. The first clamping plate 12 and the second clamping plate 13 are adapted to be assembled in the first installation space 111 and arranged along the second direction. The first limiting shaft 121 is fixedly provided on the surface of the first clamping plate 12 facing the second clamping plate 13, and the first clamping plate 12 and the second clamping plate 13 cooperate to clamp the specimen 200.
[0039] The first fixture body 11 is formed with a first installation space 111. When the first fixture 10 clamps the specimen 200, at least a part of the specimen 200 is located within the first installation space 111. Along the first direction, the end of the first installation space 111 facing the second fixture 20 is open to form a specimen assembly opening 31. The specimen assembly opening 31 is formed on the first bottom wall 113 of the first fixture body 11. The size of the specimen assembly opening 31 is smaller than the cross-sectional size of the first bottom wall 113, and the specimen 200 can enter the first installation space 111 through the specimen assembly opening 31. Along the second direction, one side of the first installation space 111 is open to form a first clamping plate assembly opening 1111. Both the first clamping plate 12 and the second clamping plate 13 can be assembled within the first installation space 111. As an example, the cross-sectional sizes of the first clamping plate 12 and the second clamping plate 13 are the same, and the cross-sectional sizes of the first clamping plate 12 and the second clamping plate 13 are both the same as the size of the first clamping plate assembly opening 1111. Both the first clamping plate 12 and the second clamping plate 13 can enter the first installation space 111 through the first clamping plate assembly opening 1111. The first clamping plate 12 and the second clamping plate 13 are arranged along the second direction, and the second clamping plate 13 is provided on the side of the first clamping plate 12 facing away from the first clamping plate assembly opening 1111.
[0040] When both the first clamping plate 12 and the second clamping plate 13 are assembled within the first installation space 111, the peripheral wall of the first clamping plate 12 abuts against the inner wall of the first installation space 111, and the first clamping plate 12 can move within the first installation space 111 along the second direction. The peripheral wall of the second clamping plate 13 also abuts against the inner wall of the first installation space 111, and the second clamping plate 13 can move within the first installation space 111 along the second direction. When the first fixture 10 clamps the specimen 200, the first clamping plate 12 and the second clamping plate 13 are oppositely arranged and spaced apart, and a part of the specimen 200 is located between the first clamping plate 12 and the second clamping plate 13. A first limiting shaft 121 is fixedly provided on the surface of the first clamping plate 12 facing the second clamping plate 13. The first limiting shaft 121 penetrates through the specimen 200, and the first clamping plate 12 plays a role in limiting the specimen 200. The first clamping plate 12 and the second clamping plate 13 cooperate to clamp the specimen 200, thereby achieving the effect of the first fixture 10 clamping the specimen 200.
[0041] In some embodiments of the present utility model, as Figure 3 shown, along the second direction, the first fixture body 11 has a first side wall 112 opposite to the first clamping plate assembly opening 1111. When the first clamping plate 12 and the second clamping plate 13 clamp the specimen 200, the first limiting shaft 121 penetrates through the second clamping plate 13 and the first side wall 112.
[0042] When the first clamping plate 12 and the second clamping plate 13 clamp the specimen 200, the second clamping plate 13 abuts against the first side wall 112. The first clamping plate 12 and the second clamping plate 13 cooperate to clamp the specimen 200. The first clamping plate 12, the specimen 200, and the second clamping plate 13 are arranged in sequence along the second direction. The first limiting shaft 121 passes through the specimen 200, the first limiting shaft 121 passes through the second clamping plate 13 and the first side wall 112, and at least part of the first limiting shaft 121 can extend out of the first installation space 111. Both the second clamping plate 13 and the first side wall 112 can limit the first limiting shaft 121, which can reduce the probability of the first limiting shaft 121 shifting, so that the specimen 200 can be stably arranged on the first fixture 10, which is beneficial to improving the stability of the installation of the specimen 200.
[0043] In some embodiments of the present invention, as Figure 3 shown, both the first side wall 112 and the second clamping plate 13 are formed with assembly holes 32, and the first limiting shaft 121 passes through the assembly hole 32 of the second clamping plate 13 and the assembly hole 32 of the first side wall 112.
[0044] Both the first side wall 112 and the second clamping plate 13 are formed with assembly holes 32, and the assembly hole 32 of the second clamping plate 13 and the assembly hole 32 of the first side wall 112 are arranged corresponding to each other along the second direction. When the first fixture 10 clamps the specimen 200, the second clamping plate 13 abuts against the first side wall 112, the assembly hole 32 of the second clamping plate 13 and the assembly hole 32 of the first side wall 112 are communicated, the first limiting shaft 121 simultaneously passes through the assembly hole 32 of the second clamping plate 13 and the assembly hole 32 of the first side wall 112, the inner wall of the assembly hole 32 of the second clamping plate 13 can be in limiting abutment with the first limiting shaft 121, the inner wall of the assembly hole 32 of the first side wall 112 can be in limiting abutment with the first limiting shaft 121, and both the second clamping plate 13 and the first side wall 112 can limit the first limiting shaft 121, thereby improving the stability of the first fixture 10 clamping the specimen 200.
[0045] In some embodiments of the present invention, the first fixture 10 may further include: a locking member, the locking member is formed with a threaded hole, the peripheral wall of the first limiting shaft 121 is formed with an external thread. When the first limiting shaft 121 passes through the second clamping plate 13 and the first side wall 112, the locking member is sleeved on the first limiting shaft 121 and is in threaded fit connection with the first limiting shaft 121, and the locking member is adapted to abut against the first side wall 112.
[0046] The locking member can be configured as a lock nut, a sleeve, etc. The locking member is formed with a threaded hole, and an external thread is formed on the peripheral wall of the first limiting shaft 121. When the first fixture 10 clamps the specimen 200, the first limiting shaft 121 passes through the second clamping plate 13 and the first side wall 112. At least a part of the first limiting shaft 121 extends out of the first installation space 111. The locking member is sleeved on the part of the first limiting shaft 121 that extends out of the first installation space 111. The threaded hole of the locking member can be fitted and assembled with the external thread on the peripheral wall of the first limiting shaft 121, so that the locking member can be threadedly connected with the first limiting shaft 121. When the first fixture 10 clamps the specimen 200, both the first clamping plate 12 and the second clamping plate 13 are in contact with the specimen 200, the second clamping plate 13 is in contact with the first side wall 112, the first limiting shaft 121 passes through the first positioning hole 210, the assembly hole 32 of the second clamping plate 13 and the assembly hole 32 of the first side wall 112. The part of the first limiting shaft 121 that extends out of the first installation space 111 is fitted and assembled with the locking member. When the locking member is in contact with the first side wall 112 and cannot be tightened anymore, the first clamping plate 12 and the second clamping plate 13 clamp the specimen 200, thereby achieving the effect that the first fixture 10 clamps the specimen 200.
[0047] Moreover, by locking or unlocking the locking member and moving the first limiting shaft 121 in the second direction, the installation and disassembly of the specimen 200 can be realized. When the first limiting shaft 121 passes through the specimen 200 and the locking member is locked, the first fixture 10 clamps the specimen 200. When the locking member is unlocked and the first limiting shaft 121 is separated from the specimen 200, the specimen 200 can be removed from the first fixture 10. The operation is simple, which is beneficial to improving the experimental efficiency.
[0048] In some embodiments of the present utility model, as Figure 3 , Figure 5 and Figure 6 shown, at least one of the surface of the first clamping plate 12 facing the second clamping plate 13 and the surface of the second clamping plate 13 facing the first clamping plate 12 is formed with a friction structure 33.
[0049] The surface of the first clamping plate 12 facing the second clamping plate 13 may be formed with a friction structure 33, or the surface of the second clamping plate 13 facing the first clamping plate 12 may be formed with a friction structure 33, or both the surface of the first clamping plate 12 facing the second clamping plate 13 and the surface of the second clamping plate 13 facing the first clamping plate 12 are formed with a friction structure 33. In the embodiments of the present application, the case where both the surface of the first clamping plate 12 facing the second clamping plate 13 and the surface of the second clamping plate 13 facing the first clamping plate 12 are formed with a friction structure 33 is taken as an example for illustration. The friction structure 33 may be configured as a mesh structure, a rhombic structure, etc. The friction structure 33 can enhance the frictional force on the surfaces of the first clamping plate 12 and the second clamping plate 13. When the first fixture 10 clamps the specimen 200, the surface of the first clamping plate 12 facing the second clamping plate 13 abuts against the specimen 200, and the surface of the second clamping plate 13 facing the first clamping plate 12 abuts against the specimen 200. The friction structure 33 formed on the surface of the first clamping plate 12 facing the second clamping plate 13 can enhance the frictional force between the first clamping plate 12 and the specimen 200 in the first direction, and the friction structure 33 formed on the surface of the second clamping plate 13 facing the first clamping plate 12 can enhance the frictional force between the second clamping plate 13 and the specimen 200 in the first direction, which is beneficial to improving the connection strength between the first fixture 10 and the specimen 200 and the safety of the high-speed tensile test.
[0050] In some embodiments of the present invention, as Figure 1 shown, the tensile test device 100 may further include: a force sensor 40, and at least one of the first fixture 10 and the second fixture 20 is fixedly provided with a force sensor 40.
[0051] The force sensor 40 can be used to detect the tensile force borne by the specimen 200 in the high-speed tensile test. At least one of the first fixture 10 and the second fixture 20 is fixedly provided with a force sensor 40. The force sensor 40 may be fixedly provided on the first fixture 10, or the force sensor 40 may be fixedly provided on the second fixture 20, or both the first fixture 10 and the second fixture 20 are fixedly provided with a force sensor 40. In the embodiments of the present application, the case where the force sensor 40 is fixedly provided on the second fixture 20 is taken as an example for illustration. The force sensor 40 can be fixedly provided on the force sensor 40 by means of bonding, clamping, etc. Installing the force sensor 40 on the second fixture 20 can obtain more accurate measurement results. By providing the force sensor 40 on the second fixture 20, the weight of the tensile test device 100 can also be reduced, the probability of abnormal oscillation in the high-speed tensile test can be reduced, the safety of the experiment can be improved, and the reliability of the experimental data can be improved.
[0052] In some embodiments of the present utility model, the force sensor 40 is a strain gauge. A strain gauge is a component composed of a sensitive grid, etc. for measuring strain. When in use, it is firmly pasted on the measuring point of the second fixture 20. After the second fixture 20 is stressed, the sensitive grid deforms as the measuring point undergoes strain, causing its resistance to change. Then, a special instrument measures the magnitude of the resistance change and converts it into the strain value of the measuring point. The operation is simple and is conducive to improving the accuracy of the measurement results.
[0053] In some embodiments of the present utility model, as Figure 1 and Figure 3 shown, the first fixture 10 and the second fixture 20 have the same structure.
[0054] The first fixture 10 and the second fixture 20 have the same structure. Correspondingly, the second fixture 20 has a second fixture body 21, a third clamping plate 22, and a fourth clamping plate 23. The structure of the third clamping plate 22 is the same as that of the first clamping plate 12, and the structure of the fourth clamping plate 23 is the same as that of the second clamping plate 13. The second fixture body 21 forms a second installation space 211. When the second fixture 20 clamps the specimen 200, at least part of the specimen 200 can be located in the second installation space 211. Along the first direction, the end of the second installation space 211 facing the first fixture 10 is open to form a specimen assembly port 31, and the specimen 200 can enter the second installation space 211 through the specimen assembly port 31. Along the second direction, one side of the second installation space 211 is open to form a second clamping plate assembly port 2111. Both the third clamping plate 22 and the fourth clamping plate 23 can be assembled into the second installation space 211 through the second clamping plate assembly port 2111. The third clamping plate 22 and the fourth clamping plate 23 are arranged along the second direction, and the fourth clamping plate 23 is provided on the side of the third clamping plate 22 away from the second clamping plate assembly port 2111. A second limiting shaft 221 is fixedly provided on the surface of the third clamping plate 22 facing the fourth clamping plate 23. An external thread is formed on the peripheral wall of the second limiting shaft 221. Along the second direction, the second fixture body 21 has a second side wall 212 opposite to the second clamping plate assembly port 2111. Assembly holes 32 are also formed on the fourth clamping plate 23 and the second side wall 212. The second limiting shaft 221 can pass through the assembly hole 32 of the fourth clamping plate 23 and the assembly hole 32 of the second side wall 212.
[0055] When the second fixture 20 clamps the specimen piece 200, the second limiting shaft 221 passes through the second positioning hole 220 of the specimen piece 200, the assembly hole 32 of the fourth clamping plate 23, and the assembly hole 32 of the second side wall 212. Both the third clamping plate 22 and the fourth clamping plate 23 are in contact with the specimen piece 200, the fourth clamping plate 23 is in contact with the second side wall 212, at least part of the second limiting shaft 221 extends out of the second installation space 211, and the locking member in the second fixture 20 is in threaded fit connection with the part of the second limiting shaft 221 extending out of the second installation space 211. When the locking member abuts against the second side wall 212 and cannot be tightened further, the third clamping plate 22 and the fourth clamping plate 23 clamp the specimen piece 200, thereby achieving the effect of the second fixture 20 clamping the specimen piece 200.
[0056] The first fixture 10 and the second fixture 20 have the same structure. The first fixture 10 and the second fixture 20 acting on both ends of the specimen piece 200 respectively can reduce the probability of the specimen piece 200 being offset when installed on the tensile testing device 100. The first fixture 10 and the second fixture 20 move relative to each other in the first direction to stretch the specimen piece 200, thereby completing the test on the strain rate sensitivity of the specimen piece 200.
[0057] The tensile testing machine according to the second aspect embodiment of the present invention includes the tensile testing device 100 in the above embodiment.
[0058] The tensile testing machine according to the embodiment of the present application uses the tensile testing device 100 in the above embodiment, which can improve the reliability of the experiment, make the experimental data more accurate, and the experimental results more reliable.
[0059] The other components and operations of the tensile testing device 100 and the tensile testing machine according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.
[0060] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0061] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. A tensile test device, characterized in that: include: A first clamp (10) and a second clamp (20), wherein the first clamp (10) and the second clamp (20) are arranged opposite to each other along a first direction, and are both used for being assembled with a tensile testing machine, and are both used for clamping a sample (200), wherein the first clamp (10) has a first limiting axis (121) extending along a second direction, and the second clamp (20) has a second limiting axis (221) extending along the second direction, and the central axis of the first limiting axis (121) and the central axis of the second limiting axis (221) are arranged opposite to each other along the first direction, and the first limiting axis (121) and the second limiting axis (221) are both used for passing the sample (200), wherein the first direction and the second direction are perpendicular to each other.
2. The tensile test device according to claim 1, characterized in that: The first clamp (10) comprises: a first clamp body (11), a first clamp plate (12) and a second clamp plate (13); the first clamp body (11) is formed with a first installation space (111); one side of the first installation space (111) along the second direction is open to form a first clamp plate assembly port (1111); and the end of the first installation space (111) facing the second clamp (20) along the first direction is open to form a sample assembly port (31); the first clamp plate (12) and the second clamp plate (13) are suitable for being assembled in the first installation space (111) and arranged along the second direction; the first limiting axis (121) is fixedly provided on the surface of the first clamp plate (12) facing the second clamp plate (13); the first clamp plate (12) and the second clamp plate (13) cooperate to clamp the sample piece (200).
3. The tensile test device according to claim 2, characterized in that: Along the second direction, the first clamp body (11) has a first side wall (112) opposite to the first clamp assembly opening (1111); when the first clamp (12) and the second clamp (13) clamp the sample (200), the first limiting axis (121) passes through the second clamp (13) and the first side wall (112).
4. The tensile test device according to claim 3, characterized in that: The first side wall (112) and the second clamping plate (13) are both formed with assembly holes (32), and the first limiting shaft (121) is inserted through the assembly hole (32) of the second clamping plate (13) and the assembly hole (32) of the first side wall (112).
5. The tensile test device according to claim 3, characterized in that: Also includes: A locking piece, wherein the locking piece is formed with a threaded hole, and the peripheral wall of the first limiting shaft (121) is formed with an external thread. When the first limiting shaft (121) is inserted into the second clamping plate (13) and the first side wall (112), the locking piece is sleeved on the first limiting shaft (121) and is threadedly connected to the first limiting shaft (121), and the locking piece is suitable for abutting against the first side wall (112).
6. The tensile test device according to claim 2, characterized in that: At least one of a surface of the first clamping plate (12) facing the second clamping plate (13) and a surface of the second clamping plate (13) facing the first clamping plate (12) is formed with a friction structure (33).
7. The tensile test device according to claim 1, characterized in that: Also includes: A force sensor (40) is fixedly provided on at least one of the first clamp (10) and the second clamp (20).
8. The tensile test device according to claim 7, characterized in that: The force sensor (40) is a strain gauge.
9. The tensile test device according to any one of claims 1 to 8, characterized in that: The first clamp (10) and the second clamp (20) have the same structure.
10. A tensile testing machine, characterized in that: It comprises a tensile test device (100) according to any one of claims 1 to 9.