Testing device

Abstract

The utility model provides a testing device, which is used for testing the bending property of a coating of a sample, and is characterized by comprising a holding part, which is configured to fix one end of the sample; the force application part comprises a first driving device and a force application element, the force application element is movably arranged to apply a test force which is formed into pressure and / or tensile force according to a set force application parameter to the unfixed free end of the sample so as to bend the sample, the first driving device is in driving connection with the force application element, and the first driving device is in driving connection with the force application element. And a driver configured to drive the force application element to form the test force. The testing device is simple in structure, facilitates reduction of occupied space, and is high in adaptability to the testing environment. The test device applies the test force formed according to the set force application parameters to the sample, so that stable force application to the sample is facilitated, the consistency of test results is improved, and the labor cost is reduced. The testing device is also beneficial to improving the practicability and reliability of a testing result in practical application.

Description

Technical Field

[0001] The present disclosure relates to the testing of the bending performance of coatings, and particularly to a testing device. Background Art

[0002] Adding a coating to the surface of a material is one of the important means to improve the heat resistance and wear resistance of the material. The adhesion effect of the coating and the bonding strength with the material surface are the main indicators for measuring the heat resistance and wear resistance of the material. At present, bending tests are usually used to verify the adhesion and bonding force of the coating, that is, to test the bending performance of the coating.

[0003] At present, in laboratories, universal tensile and compressive testing equipment is often used to carry out bending tests on sample coatings. Although the universal tensile and compressive testing equipment can control the pressure applied to the material surface and the bending degree of the material, the universal tensile and compressive testing equipment is large in volume, high in use cost, and has high requirements for the installation environment (requirements for environmental temperature, environmental humidity, vibration conditions, etc.), and is not convenient to be directly used at the production site.

[0004] In the related art, the most common bending experiment of sample coatings at the production site is to bend the test sample manually with the cooperation of a simple fixture, and observe whether the surface of the test sample is damaged or cracked, etc., so as to determine the bending performance of the sample coating. This method is suitable for testing samples at the production site because of its simple structure and convenient operation, but this method is greatly affected by the operator, the test process is not easy to control, and the result consistency is poor. Summary of the Utility Model

[0005] The purpose of the present disclosure is to provide a testing device, aiming to solve the problems that the universal tensile and compressive testing equipment is large in volume and has high requirements for the test environment, and is not suitable for using the universal tensile and compressive test to test the bending performance of sample coatings at the production site, while the manual test process is not easy to control, the result consistency is poor, and it is not suitable to use the manual test method to test the bending performance of sample coatings at the production site.

[0006] The first aspect of the present disclosure provides a testing device for testing the bending performance of a coating of a sample, including: a holding part configured to fix one end of the sample; and a force application part including a first driving device and a force application element, the force application element being movably arranged to apply a test force formed by set force application parameters as pressure and / or tension to the free end of the sample that is not fixed to bend the sample, the first driving device being drivingly connected to the force application element and being configured to drive the force application element to form the test force.

[0007] In the testing device of some embodiments, the holding part applies a holding force to the sample along a first direction, and the holding part and the force application part are arranged side by side along a second direction that forms an angle with the first direction.

[0008] In the testing device of some embodiments, the force applying element includes a pressure head, and the pressure head is configured to apply the test force formed as pressure to the free end of the sample;

[0009] The shapes of the surfaces of the indenter and the sample in contact with each other are matched.

[0010] In the testing device of some embodiments, the pressure head is hinged to the first driving device.

[0011] In some embodiments of the testing device, the first driving device includes: a swing arm rotatably arranged around a first axis; and a mounting shaft installed on the swing arm, the central axis of the mounting shaft is arranged parallel to the first axis, and the force-applying element is rotatably mounted on the mounting shaft around the central axis of the mounting shaft.

[0012] In the testing device of some embodiments, the force application parameter includes a linear velocity of the mounting shaft and / or a rotation angle of the swing arm.

[0013] In some embodiments of the testing device, the holding portion includes: a fixed seat, including a accommodating space, wherein the accommodating space is configured to place one end of the sample to be tested; a clamping element, mounted on the fixed seat and movably arranged relative to the fixed seat; and a second driving device, drivingly connected to the clamping element, configured to drive the clamping element to move so that the clamping element applies pressure to the sample and clamps the sample between the clamping element and the side wall of the accommodating space.

[0014] In some embodiments of the testing device, the fixing seat includes a curved surface, which is smoothly connected to the side wall of the accommodating space in contact with the sample, and when the sample is in a state where one end is fixed by the holding portion and is not bent, the curved surface protrudes toward the free end of the sample or protrudes toward the free end of the sample and away from the sample.

[0015] In the testing device of some embodiments, the fixing seat includes a threaded hole, which extends along the first direction and communicates with the accommodating space;

[0016] The clamping element comprises a cushion block, and the cushion block is arranged in the accommodating space;

[0017] The second driving device includes a threaded rod, which is threadedly engaged with the threaded hole, and the threaded rod is configured to drive the cushion block to move along a first direction to apply pressure along the first direction to one end of the sample in the accommodating space located on a side of the cushion block that is away from the driving connection with the threaded rod.

[0018] In the testing device of some embodiments, the surface of the cushion block facing away from the threaded rod is configured to be shape - matched with one end surface of the contacted sample.

[0019] In the testing device of some embodiments, the testing device further includes a control unit, which is configured to be signal - connected to the first driving device to control the force - applying element to form the test force with set force - applying parameters.

[0020] Based on the testing device provided by the present disclosure, the force - applying part is provided with a first driving device and a force - applying element, and the force - applying element is movable to apply a test force formed with set force - applying parameters as pressure and / or tension to the free end of the sample that is not fixed, so as to bend the sample. The first driving device is driving - connected to the force - applying element and drives the force - applying element to form the test force. This testing device has a simple structure, which is beneficial to reducing the occupation of space, and has strong adaptability to the testing environment. In addition, this testing device applies a test force formed with set force - applying parameters to the sample, which is beneficial to stably applying force to the sample, thus being beneficial to improving the consistency of the test results and also beneficial to reducing the labor cost.

[0021] In addition, in practical applications, the coating of the sample may be in a tensile stress environment or in a compressive stress state and bend. This setting realizes the simulation of the actual working conditions, which is beneficial to testing the bending performance of the coating of the sample under different stress states, thus being beneficial to improving the practicality and reliability of the test results.

[0022] Through the following detailed description of the exemplary embodiments of the present disclosure with reference to the accompanying drawings, other features and advantages of the present disclosure will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of this application. The schematic embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation to the present disclosure. In the drawings:

[0024] Figure 1 It is a schematic structural diagram of the testing device according to an embodiment of the present disclosure.

[0025] Figure 1 Among them, each reference numeral represents respectively:

[0026] 1. Motor, 2. Reducer, 31. Swing arm, 32. Mounting shaft, 4. Press head, 5. Fixing part, 51. Fixing seat, 51a. Accommodating groove, 51A. Arc surface, 52. Cushion block, 53. Threaded rod, 6. Sample, 7. Controller, 8. Platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present disclosure, its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0028] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present disclosure, it should be understood that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, the above words have no special meaning, and thus cannot be construed as limiting the scope of protection of the present disclosure.

[0030] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the scope of protection of the present disclosure; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] In the following description, the so-called "front" refers to Figure 1 the side of the middle swing arm close to the fixing portion 5; "back" refers to the side opposite to "front", and "left" and "right" refer to the left and right directions formed when facing forward.

[0032] An embodiment of the present disclosure provides a testing device for testing the bending performance of a coating of a sample 6, including: a holding part 5 and a force applying part. The holding part 5 is configured to fix one end of the sample 6. The force applying part includes a first driving device and a force applying element. The force applying element is movably arranged to apply a test force formed as a pressure and / or a tensile force with a set force application parameter to the unfixed free end of the sample 6 to bend the sample 6. The first driving device is drivingly connected to the force applying element and is configured to drive the force applying element to form the test force.

[0033] The testing device is provided with a force applying part including a first driving device and a force applying element, and the force applying element is set to be movable to apply a test force formed as a pressure and / or a tensile force with a set force application parameter to the unfixed free end of the sample 6 to bend the sample 6. The first driving device is drivingly connected to the force applying element and drives the force applying element to form the test force. The structure of the testing device is simple, which is beneficial to reducing the occupation of space and has strong adaptability to the testing environment. In addition, the testing device applies a test force formed with a set force application parameter to the sample 6, which is beneficial to stably applying force to the sample 6, thus being beneficial to improving the consistency of the test results and also being beneficial to reducing the labor cost.

[0034] In addition, in practical applications, the coating of the sample 6 may be bent under a tensile stress environment or a compressive stress state. This setting realizes the simulation of the actual working conditions, which is beneficial to testing the bending performance of the coating of the sample 6 under different stress states, thus being beneficial to improving the practicality and reliability of the test results.

[0035] In some embodiments, the holding part 5 applies a holding force to the sample 6 along a first direction A. The holding part 5 and the force applying part are arranged side by side along a second direction B that forms an angle with the first direction A.

[0036] For example, the first direction A may be the left - right direction as shown in Figure 1 and the second direction B may be as shown in Figure 1The front-rear direction shown. In some embodiments, the first driving device includes a motor 1, a speed reducer 2, a swing arm 31, and a mounting shaft 32. The motor 1 and the speed reducer 2 extend along the first direction A, and the speed reducer 2 is disposed on the left side of the motor 1. The output shaft of the speed reducer 2 extends along the second direction B. One end of the swing arm 31 is rotatably connected to the output shaft of the speed reducer 2, so that the swing arm 31 is located on the front side of the speed reducer 2. The other end of the swing arm 31 is provided with a mounting shaft 32 extending along the second direction B. The force-applying element is rotatably connected to the mounting shaft 32, so that the force-applying element extends along the second direction B and is located on the front side of the swing arm 31. The fixing portion 5 includes a fixing base 51. The fixing base 51 is disposed on the front side of the speed reducer 2 and the swing arm 3, and the movement locus of the force-applying element is located above and to the left of the fixing base 51. The fixing base 51 and the speed reducer 2 are mounted on the platform 8, which is beneficial to reducing the vibration during the testing process of the testing device, thereby avoiding the interference of the vibration on the test result. The above arrangement realizes the side-by-side arrangement of the holding portion 5 and the force-applying portion in the second direction B.

[0037] This arrangement makes the overall structure of the testing device compact, reduces the volume, and thus is convenient for use at the production site. In addition, the small volume of the testing device is also beneficial for handling, so as to realize the use of the testing device at multiple production sites, thereby improving the utilization rate of the measuring device.

[0038] In some embodiments, the force-applying element includes a pressing head 4. The pressing head 4 is configured to apply a test force formed as a pressure to the free end of the sample 6. The surface shapes of the pressing head 4 and the sample 6 cooperate with each other.

[0039] For example, as Figure 1 shown, the pressing head 4 is a cubic block and the sample 6 is a plate, so that the surfaces of the pressing head 4 and the sample 6 in contact with each other are both flat surfaces. In other embodiments not shown, the surface of the pressing head 4 in contact with the sample 6 can be changed according to the structural shape of the sample 6. For example, if the sample 6 is a rod, the contact surface of the pressing head 4 with the sample 6 can be set as an arc surface that matches the cylindrical surface shape of the sample 6.

[0040] Setting the surface shapes of the pressing head 4 and the sample 6 to cooperate with each other is beneficial for the pressing head 4 to apply force to the sample 6 evenly, reducing the local stress concentration on the surface of the sample 6, thereby avoiding the damage of the coating of the sample 6 at the contact point with the pressing head 4 and being unable to obtain accurate test results. In addition, this setting is also beneficial for reducing the sliding and misalignment of the pressing head 4 relative to the sample 6, thereby improving the accuracy of the measurement result based on the test force formed under the set force-applying parameters.

[0041] In some embodiments, the pressing head 4 is hinged to the first driving device.

[0042] This setting facilitates the indenter 4 to adaptively adjust its position and orientation using the interaction force with the sample 6. Especially when the contact surface between the indenter 4 and the sample 6 is a plane, this setting can maintain the two contact surfaces in a state of being in contact with each other, which is conducive to the consistency of the formed test force and the stability of applying the test force, thus facilitating the improvement of the accuracy of the bending property test results. On the other hand, this setting helps to reduce the problem of damage to the coating due to stress concentration in the coating of the sample 6 caused by the position deviation of the indenter 4 (for example, the angle of the contact surface of the indenter 4 with the sample 6 is inclined due to the deformation of the indenter 4, causing the side edge of the indenter 4 to contact the sample 6).

[0043] In some embodiments, the first driving device includes: a swing arm 31 and a mounting shaft 32. The swing arm 31 is rotatably arranged about a first axis. The mounting shaft 32 is mounted on the swing arm 31. The central axis of the mounting shaft 32 is arranged parallel to the first axis. The force - applying element is rotatably mounted on the mounting shaft 32 about the central axis of the mounting shaft 32.

[0044] As Figure 1 shown, the first driving device includes a motor 1, a speed reducer 2, and a swing arm 31. The input end of the speed reducer 2 is drivingly connected to the motor 1. The output end of the speed reducer 2 is rotatably connected to the swing arm 31 to drive the swing arm 31 to rotate about the first axis (i.e., the central axis of the output end of the speed reducer 2). By controlling the rotational speed of the output end of the speed reducer 2, the rotational speed of the swing arm 31 can be controlled, thereby controlling the linear velocity of the mounting shaft 32 mounted on the swing arm 31.

[0045] Applying the test force to the sample 6 by the swing arm 31 of the first driving device is conducive to precisely controlling the direction of the applied force, ensuring that the force acts on the free end of the sample 6 along the expected direction. At the same time, by controlling the movement amplitude and speed of the swing arm 31, the magnitude of the test force can be adjusted, facilitating the setting of the force - applying parameters, which is conducive to achieving fine control of the test force.

[0046] In addition, compared with the force - applying element moving in a straight line, the movement trajectory of the force - applying element driven by the swing arm 31 is conducive to the smooth application of the test force, avoiding instant impact or vibration on the sample 6, which is conducive to improving the stability of the test and the accuracy of the test results.

[0047] In some embodiments, the force - applying parameters include the linear velocity of the mounting shaft 32 and / or the rotation angle of the swing arm 31.

[0048] As Figure 1 shown, the rotation angle of the swing arm 31 is the same as the bending angle of the sample 6. By setting the force - applying parameter of the rotation angle of the swing arm 31, the bending angle of the sample 6 can be determined.

[0049] These two force parameters are easy to adjust quickly without tedious manual adjustment, which is conducive to improving test efficiency. In addition, this setting is conducive to accurately calculating and controlling the bending moment applied to the sample 6, and is also conducive to repeated tests and improving the accuracy of the results.

[0050] In some embodiments, the holding portion 5 includes: a fixing seat 51, a clamping element, and a second driving device. The fixing seat 51 includes a containing space, and the containing space is configured to place one end of the sample 6 to be tested. The clamping element is mounted on the fixing seat 51 and is movably arranged relative to the fixing seat 51. The second driving device is drivingly connected to the clamping element and is configured to drive the clamping element to move so that the clamping element applies pressure to the sample 6 and clamps the sample 6 between the clamping element and the side wall of the containing space. For example, the containing space can be set as a groove or a hole. Figure 1 As shown, the accommodating space is an accommodating groove 51a with an open upper end.

[0051] The second driving device and the clamping element are provided to facilitate the rapid replacement of the sample 6, thereby facilitating the improvement of the efficiency of the bending test. In addition, the clamping method gradually applies pressure to the sample 6, which is conducive to controlling the pressure of the clamped sample 6, and avoiding excessive pressure from damaging the coating of the non-tested part of the sample 6, thereby affecting the accuracy of the test result.

[0052] In some embodiments, Figure 1 As shown, the fixing seat 51 includes a curved surface 51A. The curved surface 51A is smoothly connected to the side wall of the accommodating space in contact with the sample 6, and when the sample 6 is in a state where one end thereof is fixed by the holding portion 5 and is not bent, the curved surface 51A protrudes toward the free end of the sample 6 or protrudes toward the free end of the sample 6 and away from the sample 6.

[0053] This arrangement is helpful in controlling the bending position and degree of the sample 6, improving the consistency of multiple tests, and avoiding stress concentration in the portion of the sample 6 that contacts the fixing seat 51 in the bent state, thereby improving the accuracy of the test results.

[0054] In some embodiments, Figure 1 As shown, the fixing seat 51 includes a threaded hole. The threaded hole extends along a first direction A and is connected to the accommodating space. The clamping element includes a cushion block 52, and the cushion block 52 is arranged in the accommodating space. The second driving device includes a threaded rod 53, and the threaded rod 53 is threadedly matched with the threaded hole. The threaded rod 53 is configured to drive the cushion block 52 to move along the first direction A to apply pressure along the first direction A to one end of the sample 6 in the accommodating space located on a side of the cushion block 52 away from the driving connection with the threaded rod 53. The cushion block 52 can be fixedly connected to the threaded rod 53, for example, or can be threadedly connected to the threaded rod.

[0055] This setting has a simple structure and is easy to operate, which is conducive to quickly and stably clamping the sample 6 between the cushion block 52 and the side wall of the accommodating space, thereby facilitating the improvement of the test efficiency. In addition, the arrangement of the cushion block 52 is conducive to protecting the coating of the sample 6 from being damaged during the clamping process, thus facilitating the improvement of the accuracy of the test results.

[0056] In some embodiments, the surface of the cushion block 52 facing away from the threaded rod 53 is configured to cooperate with the shape of one end surface of the contacted sample 6.

[0057] This setting is conducive to applying uniform pressure to the fixed end surface of the sample 6, thereby facilitating the protection of the surface of the sample 6 and also conducive to avoiding applying bending moments in other directions to the sample 6, which may affect the test results.

[0058] In some embodiments, the testing device further includes a control unit. The control unit is configured to be in signal connection with the first driving device to control the force - applying element to form a test force with set force - applying parameters.

[0059] For example, as Figure 1 shown, the control unit includes a controller 7. The controller 7 is in signal connection with the motor 1. By inputting the set force - applying parameters (such as the linear velocity of the mounting shaft 32 and / or the rotation angle of the swing arm 31) into the controller 7, the controller 7 calculates the rotation angle and speed of the output shaft of the corresponding motor 1 and sends a signal to the motor 1. The controller 7 can be implemented, for example, as a general - purpose processor, a programmable logic controller (PLC for short), a digital signal processor (DSP for short), an application - specific integrated circuit (ASIC for short), a field - programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof for performing the functions described in the present disclosure.

[0060] This setting is conducive to precisely controlling the force - applying parameters, thereby maintaining the stability and accuracy of the test force formed by the force - applying element, and is conducive to improving the repeatability of the test and the accuracy of the results. In addition, the arrangement of the controller 7 is conducive to the testing device automatically performing the force - applying operation, reducing manual intervention, conducive to reducing the result error, and improving the test efficiency.

[0061] The following Figure 1 will be a detailed description of the test method of the testing device according to the embodiments of the present disclosure:

[0062] Step 1: Insert one end of the sample 6 between the side wall of the receiving groove 51a of the cushion block 52 and the fixing seat 51;

[0063] Step 2: Rotate the threaded rod 53 clockwise to clamp one end of the sample 6 between the side wall of the receiving groove 51a of the cushion block 52 and the fixing seat 51 to prevent sliding;

[0064] Step 3: Input the set force application parameters in the controller 7, including the rotation angle of the swing arm 31 and the linear velocity of the mounting shaft 31;

[0065] Step 4: Start the motor 1 so that the indenter 4 acts on the free end of the sample 6 with the test force formed by the set force application parameters;

[0066] Step 5: Observe the state of the coating of the sample 6 to determine the bending performance of the coating under the test force formed by the set force application parameters.

Claims

1. A testing device for testing the bending performance of the coating of a sample (6), characterized in that, Comprising: A holding part (5) configured to fix one end of the sample (6); And A force - applying part, including a first driving device and a force - applying element. The force - applying element is movably arranged to apply a test force formed as a pressure and / or a tensile force with set force - applying parameters to the free end of the sample (6) that is not fixed, so as to bend the sample (6). The first driving device is drivingly connected to the force - applying element and is configured to drive the force - applying element to form the test force.

2. The test device according to claim 1, wherein The holding part (5) applies a holding force to the sample (6) along a first direction (A), and the holding part (5) and the force - applying part are arranged side by side along a second direction (B) that forms an angle with the first direction (A).

3. The testing device according to claim 1, wherein The force - applying element includes a pressing head (4), and the pressing head (4) is configured to apply the test force formed as a pressure to the free end of the sample (6); The surface of the pressing head (4) in contact with the sample (6) is in shape - matching.

4. The testing device according to claim 3, characterized in that, The pressing head (4) is hinged to the first driving device.

5. The testing device according to claim 1, characterized in that, The first driving device includes: A swing arm (31) rotatably arranged about a first axis; and A mounting shaft (32) mounted on the swing arm (31). The central axis of the mounting shaft (32) is arranged parallel to the first axis, and the force - applying element is rotatably mounted on the mounting shaft (32) about the central axis of the mounting shaft (32).

6. The test device according to claim 5, characterized in that, The force - applying parameters include the linear velocity of the mounting shaft (32) and / or the rotation angle of the swing arm (31).

7. The test device according to any one of claims 1-6, characterized in that The holding part (5) includes: A fixed seat (51) including an accommodation space configured to place one end of the sample (6) to be tested; A clamping element mounted on the fixed seat (51) and movably arranged relative to the fixed seat (51); and A second driving device drivingly connected to the clamping element and configured to drive the clamping element to move, so that the clamping element applies a pressure to the sample (6) and clamps the sample (6) between the clamping element and the side wall of the accommodation space.

8. The testing device according to claim 7, characterized in that The fixed seat (51) includes an arc surface (51A). The arc surface (51A) is smoothly connected to the side wall of the accommodation space in contact with the sample (6). And when the sample (6) is in a state where one end is fixed by the holding part (5) and not bent, the arc surface (51A) protrudes towards the free end direction of the sample (6) or protrudes towards the free end direction of the sample (6) and the direction away from the sample (6).

9. The testing device according to claim 7, wherein The fixed seat (51) includes a threaded hole extending along the first direction (A) and communicating with the accommodation space; The clamping element includes a cushion block (52), and the cushion block (52) is arranged in the accommodation space; The second driving device includes a threaded rod (53), which is threadedly engaged with the threaded hole, and the threaded rod (53) is configured to drive the cushion block (52) to move along the first direction (A) so as to apply pressure along the first direction (A) to one end of the sample (6) in the accommodating space located on the side of the cushion block (52) away from the driving connection with the threaded rod (53).

10. The testing device according to claim 9, characterized in that, The surface of the spacer (52) facing away from the threaded rod (53) is configured to be form-matched with the surface of one end of the sample (6) in contact.

11. The test device according to any one of claims 1-6, characterized in that, The device further comprises a control unit, which is configured to be connected to the first driving device by signal so as to control the force applying element to form the test force with a set force applying parameter.

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