Metal mesh testing device

Abstract

This utility model relates to the technical field of testing tools and discloses a metal mesh testing device. The metal mesh testing device includes a base, a first clamping structure, a second clamping structure, a pressure head structure, and a detection structure. The first clamping structure has a first limiting hole, and the second clamping structure has a second limiting hole. The second clamping structure and the first clamping structure are pressed against the upper and lower sides of the metal mesh sample. The pressure head structure includes a pressure joint. The pressure head structure moves so that the pressure joint can press against the metal mesh sample, and simultaneously, the pressure head structure can apply a pressing force to the second clamping structure, causing the second clamping structure to tend to move closer to the first clamping structure. The detection structure is used to detect the pressing force at the pressure joint. This utility model can quickly determine the performance of the metal mesh sample and provides guidance for improving substandard metal mesh samples, thus improving the quality of finished products made from metal mesh samples.

Description

Technical Field

[0001] This utility model relates to the technical field of testing tools, specifically to a metal mesh testing device. Background Technology

[0002] Metal mesh parts are widely used in industrial fields, such as dust covers and filters. Taking dust covers as an example, in actual production, they are usually first cold-stamped using a mold to form a flat sheet of metal mesh. The mesh is then placed in a pre-made mold, where it undergoes plastic deformation under the mold's action, ultimately being stretched into different shapes. When the stretching amount is too large, it can lead to significant plastic deformation of the mesh, making it prone to breakage in areas of intense deformation. Therefore, after the metal mesh is stretched and formed, its strength properties need to be tested to prevent the mesh from affecting product quality after manufacturing. Utility Model Content

[0003] To address the aforementioned technical problems, the main objective of this invention is to provide a metal mesh testing device, which aims to ensure better control over the performance of the metal mesh after it has been formed, thereby guaranteeing the quality of the formed product.

[0004] To achieve the above objectives, this utility model proposes a metal mesh testing device suitable for strength testing of metal mesh samples. The metal mesh testing device includes:

[0005] Base;

[0006] A first clamping structure is provided on the base and has a first limiting hole;

[0007] The second clamping structure is provided with a second limiting hole that is in relative communication with the first limiting hole. The second clamping structure is used to press against the upper and lower sides of the metal mesh sample, respectively, so that the metal mesh sample has a middle area located at the connection between the first limiting hole and the second limiting hole, and an edge area pressed by the first clamping structure and the second clamping structure. The edge area surrounds the outer periphery of the middle area.

[0008] A pressure head structure is movably disposed on the side of the second clamping structure opposite to the first clamping structure. The pressure head structure includes a pressure joint. The pressure head structure moves toward the direction of approaching the second clamping structure, so that the pressure joint can extend into the second limiting hole to press against the metal mesh sample. At the same time, the pressure head structure can apply a pressing force to the second clamping structure, so that the second clamping structure has a tendency to move toward the direction of approaching the first clamping structure.

[0009] A detection structure is provided on the crimping joint for detecting the crimping force at the crimping joint.

[0010] Optionally, the first clamping structure includes:

[0011] The first clamping base plate is connected to the base;

[0012] A first limiting plate is disposed on the first clamping base plate. The upper surface of the first limiting plate is flush with the upper surface of the first clamping base plate. The first limiting hole is disposed on the first limiting plate, and the upper surface of the first limiting plate is provided with a positioning part.

[0013] The second clamping structure is provided with a first mating part, and the positioning part is adapted to be positioned and mated with both the first mating part and the second mating part on the metal mesh sample, so as to restrict the movement of the metal mesh sample in the horizontal direction.

[0014] Optionally, the first limiting plate has first limiting protrusions on opposite sides along the horizontal direction, and the first clamping base plate has first limiting grooves that mate with the two first limiting protrusions. The cross-section of the first limiting protrusions is non-circular to form an anti-rotation fit with the first limiting grooves; and / or,

[0015] The positioning part includes a plurality of positioning protrusions that protrude from the upper surface of the first limiting plate and extend toward the second clamping structure; the first mating part includes a plurality of first positioning holes on the second clamping structure, and the plurality of positioning protrusions are adapted to pass through a plurality of second positioning holes on the metal mesh sample one by one and be inserted into a plurality of first positioning holes one by one.

[0016] Optionally, the diameters of the plurality of positioning protrusions are set differently and they surround the outer periphery of the first limiting hole.

[0017] Optionally, the second clamping structure includes:

[0018] The second clamping base plate is pressed onto the first clamping base plate and connected to the pressure head structure, the pressure head structure being movable up and down relative to the second clamping base plate;

[0019] A second limiting plate is disposed on the second clamping base plate. The lower surface of the second limiting plate is flush with the lower surface of the second clamping base plate. A second limiting hole is disposed on the second limiting plate. The second limiting plate is opposite to the first limiting plate, and the first limiting hole and the second limiting hole are arranged in a relatively connected manner along the vertical direction. The second limiting plate is provided with a plurality of first mating parts, and the plurality of first mating parts surround the outer periphery of the second limiting hole.

[0020] Optionally, the second limiting plate is provided with second limiting protrusions on opposite sides along the horizontal direction, and the second clamping base plate is provided with second limiting grooves that cooperate with the two second limiting protrusions. The cross-section of the second limiting protrusions is non-circular to form an anti-rotation fit with the second limiting grooves.

[0021] Optionally, the pressure head structure includes:

[0022] The upper cover plate is spaced apart from the base along the vertical direction;

[0023] A pressing plate is provided on the side of the upper cover plate facing the base, and the pressing joint is provided on the pressing plate;

[0024] The elastic telescopic member has the pressure plate and the second clamping structure connected to its two ends along its telescopic direction, respectively;

[0025] When the upper cover plate is subjected to an external force and moves downward toward the base, it drives the pressing plate and the pressing joint to move together and compress the elastic telescopic member. When the pressing joint extends into the second limiting hole and applies force to the metal mesh sample, the elastic telescopic member is at least partially pressed against the second limiting plate. When the external force on the upper cover plate is removed, the pressing plate and the upper cover plate can be reset under the action of the elastic restoring force of the elastic telescopic member.

[0026] Optionally, a plurality of receiving grooves are formed at the junction of the second limiting plate and the second clamping base plate, and the plurality of receiving grooves are arranged at intervals along the circumferential side of the second limiting plate; a plurality of elastic telescopic members are provided, and the plurality of elastic telescopic members are correspondingly arranged in the plurality of receiving grooves.

[0027] Optionally, the crimping plate is provided with a mounting hole, the crimping connector passes through the mounting hole, and a positioning protrusion protrudes from one side of the crimping connector. The mounting hole is provided with a relief groove corresponding to the positioning protrusion. At least a portion of the crimping connector can extend from the bottom of the mounting hole, and the mounting hole and the crimping connector form an anti-rotation fit. The upper cover plate covers the top of the mounting hole.

[0028] Optionally, the pressure head structure further includes a plurality of guide posts, one end of each guide post being screwed to the second limiting plate and the other end being sleeved on the pressing plate. The pressing plate can move up and down relative to the plurality of guide posts to move closer to or further away from the second limiting plate.

[0029] The technical solution provided by this utility model has the following beneficial effects:

[0030] The metal mesh testing device provided by this utility model is suitable for strength testing of metal mesh samples. The metal mesh testing device includes a base, a first clamping structure, a second clamping structure, a pressure head structure, and a detection structure. The base provides support, allowing the entire metal mesh testing device to be placed more stably on the test platform. The first and second clamping structures can clamp the metal mesh sample on both sides in the vertical direction to ensure that the metal mesh sample is not easily displaced during the testing process, thus ensuring the reliability of the test. Moreover, the pressure head structure presses the metal mesh sample to simulate tensile force, thereby testing the easily broken area of ​​the metal mesh sample and the stress limit of the metal mesh sample. Furthermore, the detection structure can monitor the real-time pressing force at the pressure head, allowing for better observation of the stress changes of the metal mesh sample. When a metal mesh sample is damaged, the measured stress limit value of the metal mesh sample is compared with the preset value to determine whether the metal mesh sample meets the preset requirements. This allows for a quick assessment of the performance of the metal mesh sample and provides guidance for improvement of unqualified metal mesh samples, which is also more conducive to improving the quality of finished products made from metal mesh samples. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 A schematic diagram of an embodiment of a metal mesh testing device provided by this utility model;

[0033] Figure 2 for Figure 1 An exploded structural diagram of the metal mesh testing device described herein;

[0034] Figure 3 for Figure 1 A cross-sectional structural schematic diagram of the metal mesh testing device described herein;

[0035] Figure 4 for Figure 1 Another cross-sectional structural diagram of the metal mesh testing device described herein.

[0036] Explanation of icon numbers:

[0037] 100-Metal mesh testing device; 1-Base; 2-First clamping structure; 21-First clamping base plate; 211-First limiting groove; 22-First limiting plate; 221-First limiting hole; 222-Positioning part; 2221-Positioning protrusion; 223-First limiting boss; 3-Second clamping structure; 31-Second clamping base plate; 311-Second limiting groove; 32-Second limiting plate; 321-Second limiting hole; 322-First mating part; 3221-First positioning hole; 323-Second limiting boss; 4-Pressure head structure; 41-Upper cover plate; 42-Pressure plate; 421-Mounting hole; 422-Allowing groove; 43-Pressure joint; 431-Positioning protrusion; 44-Elastic telescopic component; 45-Guide post; 5-Detection structure; 51-Force sensor; 200-Metal mesh sample.

[0038] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] This utility model provides a metal mesh testing device 100, suitable for strength testing of metal mesh samples 200. For details, please refer to... Figure 1 and Figure 2 In this embodiment, the metal mesh testing device 100 includes a base 1, a first clamping structure 2, a second clamping structure 3, a pressure head structure 4, and a detection structure 5. The first clamping structure 2 is disposed on the base 1 and has a first limiting hole 221. The second clamping structure 3 has a second limiting hole 321 that communicates with the first limiting hole 221. The second clamping structure 3 is used to press against the upper and lower sides of the metal mesh sample 200, respectively, so that the metal mesh sample 200 has a middle area located at the communication between the first limiting hole 221 and the second limiting hole 321, and an edge pressed by the first clamping structure 2 and the second clamping structure 3. The edge region surrounds the outer periphery of the middle region; the pressure head structure 4 is movably disposed on the side of the second clamping structure 3 facing away from the first clamping structure 2, the pressure head structure 4 includes a pressure joint 43, the pressure head structure 4 moves toward the direction of the second clamping structure 3, so that the pressure joint 43 can extend into the second limiting hole 321 to press against the metal mesh sample 200, and at the same time the pressure head structure 4 can apply a pressing force to the second clamping structure 3, so that the second clamping structure 3 has a tendency to move toward the first clamping structure 2; the detection structure 5 is disposed on the pressure joint 43 and is used to detect the pressing force at the pressure joint 43.

[0043] In this embodiment, the base 1 provides support, allowing the entire metal mesh testing device 100 to be placed more stably on the test platform. Preferably, in this embodiment, the entire metal mesh testing device 100 can be placed on a conventional pneumatic-hydraulic or servo press instead of an experimental machine, eliminating the need for a separate implementation platform and force application device, thus reducing operating costs. The first clamping structure 2 and the second clamping structure 3 can clamp the metal mesh sample 200 on both sides in the vertical direction, ensuring that the metal mesh sample 200 is not easily displaced during testing and guaranteeing the reliability of the test. Furthermore, the pressure head structure 4 presses the metal mesh sample 200 to simulate tensile force, thereby testing the easily broken area of ​​the metal mesh sample 200 and the stress limit of the metal mesh sample 200. Moreover, the real-time pressing force at the pressure head 43 can be monitored through the detection structure 5, allowing for better observation of the stress changes of the metal mesh sample 200. When the metal mesh sample 200 is damaged, the measured stress limit value of the metal mesh sample 200 is compared with the preset value to determine whether the metal mesh sample 200 meets the preset requirements. This allows for a quick assessment of the performance of the metal mesh sample 200 and provides guidance for improving unqualified metal mesh samples 200. It also helps to improve the quality of finished products made from the metal mesh sample 200.

[0044] The base 1 is generally flat, and preferably rectangular. A support platform protrudes from the center of the base 1. The base 1 has a relatively large area, making it easier to place stably on the press. The support platform reduces the support area, allowing for better leveling and ensuring the flatness of the support platform, thus guaranteeing the accuracy of the test.

[0045] It should be noted that when the metal mesh testing device 100 is in normal use, the base 1 is located at the bottom to support the first clamping structure 2, the second clamping structure 3 is located above the first clamping structure 2, and the pressure head structure 4 is located above the second clamping structure 3. Unless otherwise specified, all descriptions of orientation in this utility model shall be taken as such.

[0046] Regarding the first clamping structure 2, combined with Figure 2 and Figure 3As shown, the first clamping structure 2 includes a first clamping base plate 21 and a first limiting plate 22. The first clamping base plate 21 is connected to the base 1. The first clamping base plate 21 is disposed on the support platform and is specifically connected and fixed by bolts. The size of the first clamping base plate 21 is consistent with the size of the support platform. The first limiting plate 22 is disposed on the first clamping base plate 21, and preferably located in the middle of the first clamping base plate 21. The upper surface of the first limiting plate 22 is flush with the upper surface of the first clamping base plate 21. The first limiting hole 221 is disposed on the first limiting plate 22, and the upper surface of the first limiting plate 22 is provided with a positioning part 222. The second clamping structure 3 is provided with a first mating part 322. The positioning part 222 is adapted to be positioned and mated with the first mating part 322 and the second mating part on the metal mesh sample 200 to restrict the metal mesh sample 200 from moving in the horizontal direction, ensuring the accuracy of the position of the metal mesh sample 200, and preventing the metal mesh sample 200 from shifting during testing.

[0047] Preferably, combined with Figure 2 and Figure 4 As shown, the positioning part 222 includes a plurality of positioning protrusions 2221 protruding from the upper surface of the first limiting plate 22 and extending toward the second clamping structure 3; the first mating part 322 includes a plurality of first positioning holes 3221 provided on the second clamping structure 3, and the plurality of positioning protrusions 2221 are adapted to pass through the plurality of second positioning holes on the metal mesh sample 200 one by one and be inserted into the plurality of first positioning holes 3221 one by one, with the second positioning holes forming a second mating part on the metal mesh sample 200. During testing, the plurality of second positioning holes of the metal mesh sample 200 can be inserted one by one into the plurality of positioning protrusions 2221, and then the second clamping structure 3 can be pressed down, so that the plurality of positioning protrusions 2221 are inserted one by one into the plurality of first positioning holes 3221, which restricts the metal mesh sample 200 and also restricts the relative position of the first limiting plate 22 and the second clamping structure 3, thus ensuring the reliable clamping of the metal mesh sample 200.

[0048] Furthermore, to ensure that the first limiting plate 22 is not easily moved during testing, first limiting protrusions 223 are respectively provided on opposite sides of the first limiting plate 22 along the horizontal direction. The first clamping base plate 21 is provided with two first limiting grooves 211 that are configured to mate with the two first limiting protrusions 223. The cross-section of the first limiting protrusions 223 is non-circular to form an anti-rotation fit with the first limiting grooves 211, thereby better preventing the first limiting plate 22 from rotating or shifting relative to the first clamping base plate 21. The two first limiting protrusions 223 can be respectively provided on the left and right sides or the front and back sides of the first limiting plate 22, or four first limiting protrusions 223 can be provided, respectively provided on the front and back sides and the left and right sides of the first limiting plate 22.

[0049] Preferably, the diameters of the plurality of positioning protrusions 2221 are set differently and they surround the outer periphery of the first limiting hole 221, which can achieve better and faster alignment and avoid reverse installation.

[0050] For the second clamping structure 3, preferably, combined with Figure 2 and Figure 3 As shown, the second clamping structure 3 includes a second clamping base plate 31 and a second limiting plate 32. The second clamping base plate 31 is pressed onto the first clamping base plate 21 and connected to the pressing head structure 4. The second clamping base plate 31 matches the first clamping base plate 21 and is stacked in the vertical direction. The pressing head structure 4 can move up and down relative to the second clamping base plate 31, so that the pressing head 43 can extend into the second limiting hole 321 to press the metal mesh sample 200, and so that the pressing head 43 can rise away from the metal mesh sample 200. The second limiting plate 32 is disposed on the second clamping base plate 31. The lower surface of the second limiting plate 32 is flush with the lower surface of the second clamping base plate 31. The second limiting hole 321 is disposed on the second limiting plate 32. The second limiting plate 32 is opposite to the first limiting plate 22, and the first limiting hole 221 and the second limiting hole 321 are arranged in a relatively connected manner in the vertical direction. The second limiting plate 32 is provided with a plurality of first mating parts 322, and the plurality of first mating parts 322 surround the outer periphery of the second limiting hole 321. The upper and lower sides of the metal mesh sample 200 are pressed together by the first limiting plate 22 and the second limiting hole 321, respectively. The areas of the first limiting plate 22 and the second limiting plate 32 are relatively small, so the flatness of the upper surface of the first limiting plate 22 and the lower surface of the second limiting plate 32 can be better guaranteed during manufacturing, so as to ensure that the first limiting plate 22 and the second limiting plate 32 can be pressed together more tightly and the pressing effect on the metal mesh is better.

[0051] Furthermore, the second limiting plate 32 is provided with second limiting protrusions 323 on opposite sides along the horizontal direction, and the second clamping base plate 31 is provided with second limiting grooves 311 that are configured to mate with the two second limiting protrusions 323 one-to-one. The cross-section of the second limiting protrusions 323 is non-circular to form an anti-rotation fit with the second limiting grooves 311, thereby better preventing the second limiting plate 32 from rotating or shifting relative to the second clamping base plate 31. The two second limiting protrusions 323 can be provided on the left and right sides or the front and rear sides of the second limiting plate 32, or four second limiting protrusions 323 can be provided on the front and rear and left and right sides of the second limiting plate 32, respectively.

[0052] For the pressure head structure 4, the pressure head structure 4 includes an upper cover plate 41, a pressing plate 42, and an elastic telescopic member 44. The upper cover plate 41 and the base 1 are arranged at relative intervals in the vertical direction. The pressing plate 42 is located on the side of the upper cover plate 41 facing the base 1, and the pressing joint 43 is located on the pressing plate 42. The two ends of the elastic telescopic member 44 along its telescopic direction are respectively connected to the pressing plate 42 and the second clamping structure 3. When the upper cover plate 41 is subjected to an external force and moves downward toward the base 1, it drives the pressing plate 42 and the pressing joint 43 to move together and compress the elastic telescopic member 44. This causes the pressing joint 43 to extend into the second limiting hole 321 and apply force to the metal mesh sample 200, at least partially pressing the elastic telescopic member 44 against the second limiting plate 32. When the external force on the upper cover plate 41 is removed, the pressing plate 42 and the upper cover plate 41 can return to their original positions under the elastic restoring force of the elastic telescopic member 44. The movement of the upper cover plate 41 drives the pressing joint 43 to press against the test metal mesh sample 200, and also allows the elastic telescopic member 44 to press against the second limiting plate 32, resulting in a tighter press against the metal mesh sample 200 and better ensuring the stability of the metal mesh sample 200 during testing.

[0053] Furthermore, multiple receiving grooves are formed at the junction of the second limiting plate 32 and the second clamping base plate 31, and these grooves are spaced apart along the circumference of the second limiting plate 32. Multiple elastic telescopic members 44 are provided, each corresponding to one of the receiving grooves, to restrict the position of the elastic telescopic members 44. When the elastic telescopic members 44 are compressed, the pressing effect on the second limiting plate 32 is better. The elastic telescopic members 44 can be configured as telescopic springs. The cross-section of each receiving groove is approximately circular, with the groove opening facing upwards. Each receiving groove is radially divided into two halves, with one half formed on the second limiting plate 32 and the other half formed on the second clamping base plate 31, allowing simultaneous pressing action on both the second limiting plate 32 and the second clamping base plate 31. Preferably, four telescopic springs are provided, and the four telescopic springs are respectively provided on the front, rear, left and right sides of the second limiting plate 32, so that the pressing force on the second limiting plate 32 is more balanced.

[0054] Preferably, the crimp connector 43 is detachably mounted on the crimping plate 42. Specifically, the crimping plate 42 has a mounting hole 421, the crimp connector 43 passes through the mounting hole 421, and a positioning protrusion 431 protrudes from one side. The mounting hole 421 has a relief groove 422 corresponding to the positioning protrusion 431. At least a portion of the crimp connector 43 can extend from the bottom of the mounting hole 421, and the mounting hole 421 and the crimp connector 43 form an anti-rotation fit. The upper cover plate 41 covers the top of the mounting hole 421, thereby completely positioning the crimp connector 43 within the mounting hole 421, and both assembly and disassembly are relatively convenient.

[0055] Moreover, the bottom end of the crimping head 43 is spherical. When the crimping head 43 is pressed against the metal mesh sample 200, the forming limit of the wire mesh in different directions can be tested at one time, which is more comprehensive than the test results on a direct mechanical testing machine.

[0056] Furthermore, the pressure head structure 4 also includes a plurality of guide posts 45, one end of each guide post 45 being screwed onto the second limiting plate 32, and the other end being sleeved onto the pressing plate 42. The pressing plate 42 can move up and down relative to the plurality of guide posts 45 to move closer to or further away from the second limiting plate 32. Through the guiding effect of the plurality of guide posts 45, the pressure head 43 is more stable when moving up and down and is less prone to shaking, thus ensuring more accurate test results.

[0057] Combination Figures 2 to 4As shown, the detection structure 5 may include a force sensor 51, which can convert the detected crimping force of the crimping joint 43 into a measurable electrical signal. Specifically, the force sensor 51 can be electrically connected to an external display device, which can display the electrical signal measured by the force sensor 51, such as voltage and current values, thereby allowing for a more intuitive observation of the force changes on the metal mesh sample 200.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A metal mesh testing apparatus adapted for strength testing of a metal mesh sample, characterized by, The metal mesh testing device includes: Base; A first clamping structure is provided on the base and has a first limiting hole; The second clamping structure is provided with a second limiting hole that is in relative communication with the first limiting hole. The second clamping structure is used to press against the upper and lower sides of the metal mesh sample, respectively, so that the metal mesh sample has a middle area located at the connection between the first limiting hole and the second limiting hole, and an edge area pressed by the first clamping structure and the second clamping structure. The edge area surrounds the outer periphery of the middle area. A pressure head structure is movably disposed on the side of the second clamping structure opposite to the first clamping structure. The pressure head structure includes a pressure joint. The pressure head structure moves toward the direction of approaching the second clamping structure, so that the pressure joint can extend into the second limiting hole to press against the metal mesh sample. At the same time, the pressure head structure can apply a pressing force to the second clamping structure, so that the second clamping structure has a tendency to move toward the direction of approaching the first clamping structure. A detection structure is provided on the crimping joint for detecting the crimping force at the crimping joint.

2. The metal screen testing device of claim 1, wherein, The first clamping structure includes: The first clamping base plate is connected to the base; A first limiting plate is disposed on the first clamping base plate. The upper surface of the first limiting plate is flush with the upper surface of the first clamping base plate. The first limiting hole is disposed on the first limiting plate, and the upper surface of the first limiting plate is provided with a positioning part. The second clamping structure is provided with a first mating part, and the positioning part is adapted to be positioned and mated with both the first mating part and the second mating part on the metal mesh sample, so as to restrict the movement of the metal mesh sample in the horizontal direction.

3. The metal mesh testing device as described in claim 2, characterized in that, The first limiting plate has first limiting protrusions on opposite sides along the horizontal direction, and the first clamping base plate has first limiting grooves that mate with the two first limiting protrusions. The cross-section of the first limiting protrusions is non-circular to form an anti-rotation fit with the first limiting grooves; and / or, The positioning part includes a plurality of positioning protrusions that protrude from the upper surface of the first limiting plate and extend toward the second clamping structure; the first mating part includes a plurality of first positioning holes on the second clamping structure, and the plurality of positioning protrusions are adapted to pass through a plurality of second positioning holes on the metal mesh sample one by one and be inserted into a plurality of first positioning holes one by one.

4. The metal mesh testing device as described in claim 3, characterized in that, The diameters of the plurality of positioning protrusions are set differently and they surround the outer periphery of the first limiting hole.

5. The metal mesh testing device as described in claim 2, characterized in that, The second clamping structure includes: The second clamping base plate is pressed onto the first clamping base plate and connected to the pressure head structure, the pressure head structure being movable up and down relative to the second clamping base plate; A second limiting plate is disposed on the second clamping base plate. The lower surface of the second limiting plate is flush with the lower surface of the second clamping base plate. A second limiting hole is disposed on the second limiting plate. The second limiting plate is opposite to the first limiting plate, and the first limiting hole and the second limiting hole are arranged in a relatively connected manner along the vertical direction. The second limiting plate is provided with a plurality of first mating parts, and the plurality of first mating parts surround the outer periphery of the second limiting hole.

6. The metal mesh testing device as described in claim 5, characterized in that, The second limiting plate has a second limiting boss on each of its two opposite sides along the horizontal direction. The second clamping base plate has a second limiting groove that is configured to cooperate with the two second limiting bosses. The cross-section of the second limiting boss is non-circular to form an anti-rotation fit with the second limiting groove.

7. The metal mesh testing device as described in claim 6, characterized in that, The pressure head structure includes: The upper cover plate is spaced apart from the base along the vertical direction; A pressing plate is provided on the side of the upper cover plate facing the base, and the pressing joint is provided on the pressing plate; The elastic telescopic member has the pressure plate and the second clamping structure connected to its two ends along its telescopic direction, respectively; When the upper cover plate is subjected to an external force and moves downward toward the base, it drives the pressing plate and the pressing joint to move together and compress the elastic telescopic member. When the pressing joint extends into the second limiting hole and applies force to the metal mesh sample, the elastic telescopic member is at least partially pressed against the second limiting plate. When the external force on the upper cover plate is removed, the pressing plate and the upper cover plate can be reset under the action of the elastic restoring force of the elastic telescopic member.

8. The metal mesh testing device as described in claim 7, characterized in that, Multiple receiving grooves are formed at the junction of the second limiting plate and the second clamping base plate, and the multiple receiving grooves are arranged at intervals along the circumference of the second limiting plate; multiple elastic telescopic members are provided, and the multiple elastic telescopic members are correspondingly arranged in the multiple receiving grooves.

9. The metal mesh testing device as described in claim 7, characterized in that, The crimping plate is provided with a mounting hole, the crimping connector passes through the mounting hole, and a positioning protrusion protrudes from one side of the crimping connector. The mounting hole is provided with a relief groove corresponding to the positioning protrusion. At least a part of the crimping connector can extend from the bottom of the mounting hole, and the mounting hole and the crimping connector form an anti-rotation fit. The upper cover plate is provided on the top of the mounting hole.

10. The metal mesh testing device as described in claim 7, characterized in that, The pressure head structure also includes multiple guide posts, one end of each guide post is screwed to the second limiting plate, and the other end is sleeved on the pressing plate. The pressing plate can move up and down relative to the multiple guide posts to move closer to or further away from the second limiting plate.

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