Tension testing machine

Abstract

The tension testing machine comprises a fixed base, a second clamping part and a protection part, the protection part is provided with the fixed base, a protection cavity is defined by the protection part, the two ends of a sample to be tested are connected with the first clamping part and the second clamping part respectively and located in the protection cavity, and the protection part is in sliding connection with the fixed base. The sliding direction is parallel to the first direction, and the protection part can move relative to the first clamping part, so that the to-be-tested sample is always located in the protection cavity. According to the tensile machine, the protection part is arranged to be capable of sliding relative to the fixed base, so that the sample to be tested is always arranged in the protection cavity in a covering mode, the protection part with the small size can be arranged to guarantee the protection effect, and the cost and the occupied space of the tensile machine are reduced; moreover, the relative position of the protection part and the fixed base can be adjusted, and the situation that the same position of the protection part is impacted by chippings many times, and consequently the service life of the protection part is shortened is avoided.

Description

Technical Field

[0001] This disclosure relates to the field of material performance testing technology, and in particular to a tensile testing machine. Background Technology

[0002] Tensile testing machines are commonly used mechanical testing equipment, such as for testing the tensile and fracture properties of carbon fibers.

[0003] When using a tensile testing machine in related technologies, the test sample will generate outward flying debris when it breaks during the test. This debris can cause injury to operators and environmental pollution. Therefore, it is essential to provide a tensile testing machine that can prevent the flying of fracture debris. Utility Model Content

[0004] To address the problems in the related technologies, this disclosure provides a tensile testing machine.

[0005] According to an embodiment of this disclosure, a tensile testing machine is provided, comprising:

[0006] A fixed base is provided with a first clamping part on its top surface;

[0007] The second clamping part is connected to the tensile testing machine, and the second clamping part can move closer to or further away from the first clamping part in a first direction;

[0008] A protective part is disposed on the fixed base. The protective part is used to define a protective cavity. The two ends of the sample to be tested are respectively connected to the first clamping part and the second clamping part and are located inside the protective cavity.

[0009] The protective part is slidably connected to the fixed base, and the sliding direction is parallel to the first direction. The protective part moves relative to the first clamping part so that the sample to be tested is always located inside the protective cavity.

[0010] In some embodiments, when the second clamping part moves a first preset distance along the first direction, the protective part moves a second preset distance along the first direction;

[0011] The first preset distance is twice the second preset distance.

[0012] In some embodiments, the tensile testing machine further includes a lifting drive unit connected to the protective part, which is used to drive the protective part to move in the first direction.

[0013] In some embodiments, the protective part is connected to the output end of the tensile testing machine.

[0014] In some embodiments, the tensile testing machine is connected to the protective part via a movable pulley mechanism;

[0015] The movable pulley mechanism includes a pulley and a traction rope wound around the pulley, wherein the protective part is rotatably connected to the pulley, one end of the traction rope is connected to the tensile testing machine, and the other end of the traction rope is connected to the support of the tensile testing machine.

[0016] In some embodiments, the protective part includes a housing and a door, the door being rotatably connected to the housing via a preset pivot, and the door rotating about the preset pivot to open or close the protective cavity;

[0017] At least one of the housing and the door is provided with a magnet, and when the protective cavity is in a closed state, the door and the housing are magnetically connected.

[0018] In some embodiments, the tensile testing machine further includes a limiting mechanism, which includes a limiting pin and a limiting hole, wherein one of the limiting pin and the limiting hole is disposed on the bracket of the tensile testing machine, and the other is disposed on the door body;

[0019] Wherein, when the distance between the first clamping part and the second clamping part is greater than a preset distance, the limiting pin extends into the limiting hole; when the distance between the first clamping part and the second clamping part is less than or equal to the preset distance, the limiting pin separates from the limiting hole.

[0020] In some embodiments, magnets are provided on both the door and the housing;

[0021] When the protective cavity is in a closed state, the opposite magnetic poles of the two magnets face each other to form a magnetic attraction force, and the direction of the magnetic attraction force is parallel to the radial direction of the preset rotating shaft.

[0022] In some embodiments, the tensile testing machine further includes a waste container, which is detachably disposed between the fixed base and the first clamping part; or...

[0023] The waste box is located on the bottom wall of the protective part.

[0024] In some embodiments, the tensile testing machine further includes a scale disposed on the fixed base, the scale increment direction of which is parallel to the first direction, and the scale is used to measure the height of the second clamping part.

[0025] The beneficial effects of this disclosure are: by setting the protective part to be able to slide relative to the fixed base so that the sample to be tested is always covered in the protective cavity, a smaller protective part can be set to ensure the protective effect, reduce the cost and space occupied by the tensile testing machine; and the relative position of the protective part and the fixed base can be adjusted to avoid the same position of the protective part being hit by debris multiple times, which would shorten the service life of the protective part. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 disclosure. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a tensile testing machine provided according to an exemplary embodiment;

[0028] Figure 2 This is a schematic diagram of a tensile testing machine provided according to an exemplary embodiment;

[0029] Figure 3 This is a schematic diagram of a tensile testing machine provided according to an exemplary embodiment;

[0030] Figure 4 This is a schematic diagram of a tensile testing machine provided according to an exemplary embodiment;

[0031] Figure 5 This is a schematic diagram of a tensile testing machine provided according to an exemplary embodiment;

[0032] Figure 6 This is a schematic diagram of a waste container provided according to an exemplary embodiment.

[0033] 10. Fixed base; 11. First clamping part; 12. Support;

[0034] 20. Tensile testing machine; 21. Second clamping part; 22. Adapter part; 221. Guide hole;

[0035] 30. Protective section; 30a. Protective cavity; 31. Housing; 32. Door; 33. Pre-set pivot;

[0036] 40. Movable pulley mechanism; 41. Pulley; 42. Traction rope;

[0037] 50. Limiting mechanism; 51. Limiting pin; 52. Limiting hole;

[0038] 60. Waste box. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments and feature vectors in this disclosure can be arbitrarily combined with each other.

[0040] To address the problems existing in related technologies, this disclosure provides a tensile testing machine. The tensile testing machine includes a fixed base, a second clamping part, and a protective part. The protective part is connected to the fixed base and defines a protective cavity. The two ends of the sample to be tested are respectively connected to the first clamping part and the second clamping part and located within the protective cavity. The protective part is slidably connected to the fixed base, and the sliding direction is parallel to a first direction. The protective part can move relative to the first clamping part so that the sample to be tested is always located within the protective cavity. In this disclosure, by setting the protective part to be able to slide relative to the fixed base to always cover the sample to be tested within the protective cavity, a smaller protective part can be used to ensure the protective effect, reducing the cost and space occupied by the tensile testing machine. Furthermore, the relative position of the protective part and the fixed base can be adjusted to avoid repeated impacts of debris on the same position of the protective part, which would shorten the service life of the protective part.

[0041] According to an exemplary embodiment of this disclosure, such as Figure 1 and Figure 2 As shown, this disclosure provides a tensile testing machine for testing the mechanical properties of various materials, such as tensile, tearing, and peeling.

[0042] like Figure 1 and Figure 2 As shown, the tensile testing machine includes a fixed base 10, which is used to place the machine on a worktable. The fixed base 10 serves to install and support other structures and components of the tensile testing machine. For example, Figures 1 to 3 A rectangular plate-shaped fixing base 10 is shown.

[0043] like Figure 3 As shown, the fixed base 10 is provided with a first clamping part 11 and a second clamping part 21, which are respectively used to clamp the two ends of the sample to be tested. (See reference...) Figure 3 The first clamping part 11 is fixedly connected to the fixed base 10, and the second clamping part 21 is connected to the tensile testing machine 20. The tensile testing machine 20 can drive the second clamping part 21 in a first direction ( Figure 1The tensile testing machine 20 moves relative to and away from the first clamping part 11 in the z-direction (as shown in the diagram) to stretch the sample to be tested. The tensile testing machine 20 can also move the second clamping part 21 closer to the first clamping part 11. When the distance between the first clamping part 11 and the second clamping part 21 is less than the natural length of the sample to be tested, the sample to be tested can be fixed to the first clamping part 11 and the second clamping part 21, or the sample that has completed the test can be removed from the first clamping part 11 and the second clamping part 21.

[0044] like Figure 1 , Figure 2 and Figure 4 As shown, the tensile testing machine also includes a protective part 30, which is disposed on the fixed base 10. The protective part 30 defines a protective cavity 30a. During the tensile test, the sample to be tested is always located in the protective cavity 30a, so that the debris generated when the sample to be tested breaks will be intercepted by the side wall of the protective part 30.

[0045] Among them, such as Figure 1 As shown, the protective part 30 is slidably connected to the fixed base 10, and the sliding direction is the same as the first direction ( Figure 1 As shown in the diagram (z-direction), the movement direction of the protective part 30 is parallel to the arrangement direction of the first clamping part 11 and the second clamping part 21. During the tensile test, the relative position between the protective part 30 and the first clamping part 11 can be adjusted so that the sample to be tested is always located within the protective cavity 30a. For example, as the second clamping part 21 gradually rises and moves away from the first clamping part 11, the height of the protective part 30 also gradually increases.

[0046] In this embodiment, by setting the protective part to slide relative to the fixed base, the sample to be tested is always covered in the protective cavity. This allows for a smaller protective part to ensure the protective effect, reducing the cost and space occupied by the tensile testing machine. Furthermore, the relative position of the protective part and the fixed base can be adjusted to prevent the same position of the protective part from being repeatedly impacted by debris, thus shortening the service life of the protective part.

[0047] In one exemplary embodiment, such as Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a tensile testing machine, which includes a fixed base 10, a second clamping part 21, and a protective part 30. The protective part 30 is provided with the fixed base 10 and defines a protective cavity 30a. The two ends of the sample to be tested are respectively connected to the first clamping part 11 and the second clamping part 21 and are located in the protective cavity 30a. The protective part 30 is slidably connected to the fixed base 10, and the sliding direction is parallel to the first direction. The protective part 30 can move relative to the first clamping part 11 so that the sample to be tested is always located in the protective cavity 30a.

[0048] In some embodiments, as Figure 1 As shown, the tensile testing machine includes a lifting drive unit (not shown in the attached diagram), which may be a cylinder, an electric actuator, or a motor connected to a screw-slider mechanism. The lifting drive unit is connected to the protective section 30, and can drive the protective section 30 in a first direction (…). Figure 1 It moves in the z-direction shown in the diagram.

[0049] It should be noted that the driving distance of the lifting drive unit and the tensile testing machine 20 can be the same or different.

[0050] In one example, see Figure 1 The lifting speed of the lifting drive unit is half the stretching speed of the tensile testing machine 20. For example, when the tensile testing machine 20 drives the second clamping part 21 to stretch the sample to be tested, the tensile testing machine 20 and the lifting drive unit start synchronously. When the second clamping part 21 moves a first preset distance along the first direction, the protective part 30 moves a second preset distance along the first direction. The first preset distance is twice the second preset distance. In this example, by adaptively setting the initial position of the lifting drive unit, the geometric center of the protective cavity 30a can always be located between the first clamping part 11 and the second clamping part 21, that is, the protective part 30 always irradiates the area prone to breakage, thereby providing effective protection.

[0051] In some other embodiments, as shown in FIG. 1, the protective part 30 is connected to the output end of the tensile testing machine 20. When the tensile testing machine 20 drives the second clamping part 21 to move along the first direction, the tensile testing machine 20 can also drive the protective part 30 to move along the first direction, so that the sample to be tested is always located within the protective cavity 30a defined by the protective part 30.

[0052] In one example, such as Figure 4 and Figure 5 As shown, the tensile testing machine 20 is connected to the protective part 30 via a movable pulley mechanism 40. (See reference...) Figure 1 The movable pulley mechanism 40 includes a pulley 41 and a traction rope 42 wound around the pulley 41. The pulley 41 is rotatably connected to the housing 31 of the protective part 30 (described in detail later). One end of the traction rope 42 is connected to the tensile testing machine 20, and the other end of the traction rope 42 is connected to the support 12 of the tensile testing machine. It is understood that the movable pulley mechanism 40 has the functions of saving effort and changing speed. The tensile testing machine 20 can raise the height of the protective part 30 with half the original pulling force. Furthermore, the tensile testing machine 20 raises the second clamping part 21 at twice the speed of the protective part 30, making the distance the second clamping part 21 moves twice that of the protective part 30. This allows the protective part 30 to move synchronously with the deformation of the sample under test, and the geometric center of the protective part 30 always coincides with or is close to the geometric center of the sample under test, effectively preventing debris generated when the sample under test breaks.

[0053] Continue reading Figure 1 The tensioning machine 20 is connected to the traction rope 42 via an adapter 22. The adapter 22 can be a rectangular plate, with its four corners corresponding to the four movable pulleys 41 on the protective part 30. A guide hole 221 can be provided on the adapter 22, through which the traction rope 42 passes to connect with the bracket 12. By providing the guide hole 221, slippage of the protective part 30 can be reduced or prevented.

[0054] In one exemplary embodiment, such as Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a tensile testing machine, which includes a fixed base 10, a second clamping part 21, and a protective part 30. The protective part 30 is provided with the fixed base 10 and defines a protective cavity 30a. The two ends of the sample to be tested are respectively connected to the first clamping part 11 and the second clamping part 21 and are located in the protective cavity 30a. The protective part 30 is slidably connected to the fixed base 10, and the sliding direction is parallel to the first direction. The protective part 30 can move relative to the first clamping part 11 so that the sample to be tested is always located in the protective cavity 30a.

[0055] In this embodiment, as Figure 2 and Figure 4 As shown, the protective unit 30 includes a housing 31 and a door 32. The door 32 is rotatably connected to the housing 31 via a preset pivot 33. Rotation of the door 32 around the preset pivot 33 can open or close the protective cavity 30a. When the protective cavity 30a is in the open state (see...), Figure 2 The sample to be tested can be placed into the protective cavity 30a, and the two ends of the sample to be tested can be fixed to the first clamping part 11 and the second clamping part 21 respectively. When the protective cavity 30a is in a closed state (see...), Figure 1 It can control the first clamping part 11 and the second clamping part 21 to move away from each other during the tensile test. The protective cavity 30a in the encapsulated state provides protection during the test and blocks the debris generated by the breakage of the sample under test.

[0056] Among them, see Figure 1 and Figure 2 At least one of the enclosure 31 and the door 32 is equipped with a magnet. When the protective cavity 30a is in a closed state, the door 32 is magnetically connected to the enclosure 31 to prevent the door 32 from being opened and failing to provide protection when impacted by debris. Magnetic fixing is a method that can quickly lock and unlock, saving the time required to open and close the protective cavity 30a, thereby greatly improving testing efficiency.

[0057] In one example, magnets are provided on both the door 32 and the housing 31. When the protective part 30 is in the closed state, the irregular magnetic poles of the two magnets on the door 32 and the housing 31 are aligned, and the magnetic attraction direction of the two magnets can be parallel to the tangential direction of the preset rotating shaft 33, thereby locking the door 32 and the housing 31 by magnetic attraction.

[0058] In another example, one of the door 32 and the housing 31 is equipped with a magnet, while the other is made of a magnetic metal. For example, the door 32 is equipped with a magnet, and the housing 31 is made of a magnetic metal (such as an iron alloy). Alternatively, the magnet is located in the housing 31, and when the protective part 30 is closed, the structure of the door 32 facing the housing 31 is made of a magnetic metal. When the protective cavity 30a is closed, the magnet can be magnetically attracted to the magnetic metal. By adaptively setting the position of the magnet, the direction of the magnetic attraction between the magnet and the magnetic metal can be made parallel to the tangential direction of the preset rotating shaft 33.

[0059] Among them, such as Figure 1 As shown, the tensile testing machine also includes a limiting mechanism 50, which includes a limiting pin 51 and a limiting hole 52. One of the limiting pin 51 and the limiting hole 52 is disposed on the support 12 of the tensile testing machine, and the other is disposed on the door 32. The support 12 is disposed on a column on the fixed base 10, and the support 12 has the functions of supporting the tensile testing machine 20 and protecting the protective part 30. It can be understood that the support 12 of the tensile testing machine remains fixed, while the housing 31 of the protective part 30 can move in the first direction, so that the limiting pin 51 and the limiting hole 52 can move relative to each other to switch between a mating state and a disengaged state. When the limiting pin 51 extends into the air, it can lock the relative position of the door 32 and the housing 31. When the limiting pin 51 separates from the limiting hole 52, a pulling force is applied to the door 32 along the tangent direction of the preset rotating shaft 33, which can open the protective cavity 30a.

[0060] For example, see Figure 1 When the distance between the first clamping part 11 and the second clamping part 21 is greater than a preset distance, it indicates that the sample to be tested is in a tensile state, that is, it is currently in a tensile test state. At this time, the limiting pin 51 can extend into the limiting hole 52 to lock the door 32 and prevent the door 32 from rotating relative to the box 31. Conversely, when the distance between the first clamping part 11 and the second clamping part 21 is less than or equal to the preset distance, it indicates that the sample to be tested is not in a tensile state, or the tensile length of the sample to be tested is extremely small and the possibility of breakage is extremely small. At this time, the limiting pin 51 separates from the limiting hole 52, and the door 32 can be fixed by the magnetic attraction of the magnet alone.

[0061] As can be seen from the above, the limiting mechanism 50 of the tensile testing machine provided in this embodiment can automatically lock or unlock the door 32 of the protective part 30 according to the test state. On the basis of locking the door 32 of the protective part 30 by magnetic attraction, the limiting mechanism 50 can further enhance the protective effect and improve the safety.

[0062] Among them, such as Figure 1 As shown, both the door 32 and the housing 31 are equipped with magnets. When the protective cavity 30a is closed, the irregularly shaped magnetic poles of the two magnets face each other, forming a magnetic attraction force. The direction of the magnetic attraction force is parallel to the radial direction of the preset rotating shaft 33. It can be determined that when the door 32 needs to be opened, the direction of the applied external force is tangent to the direction of the magnetic attraction force; that is, the door 32 can be opened without applying a large external force. When the magnets are set in the above manner and the limiting mechanism 50 is set, the magnets do not need to provide a large attraction force; their main function is to provide alignment between the auxiliary limiting pin 51 and the limiting hole 52.

[0063] Among them, such as Figure 1 and Figure 6 As shown, the tensile testing machine also includes a waste container 60, which is used to collect waste generated during testing. The waste container 60 is detachably disposed between the fixed base 10 and the first clamping part 11. For example, the waste container 60 can be detachably connected to the fixed base 10 by means of snap-fit, magnetic attraction, etc. The waste container 60 can also be disposed at the bottom of the housing 31 of the protective part 30.

[0064] In one example, see Figure 6 Viewing the waste box 60 from a top-down angle, the waste box 60 is U-shaped. The connection structure between the first clamping part 11 and the fixed base 10 is located in the U-shaped notch. By pulling the waste box 60 in the opposite direction of the U-shaped opening, the waste box 60 can be taken out.

[0065] Among them, such as Figure 1 As shown, the tensile testing machine also includes a scale (not shown in the attached diagram) mounted on the fixed base 10. The direction of scale increase is parallel to the stretching direction of the tensile testing machine 20 (i.e., the first direction). Figure 1 The scale is parallel to the z-direction shown in the figure and is used to measure the height of the second clamping part 21.

[0066] In one example, the second clamping part 21 can be reset using a ruler to ensure that the second clamping part 21 has a suitable height, thereby controlling the test variables.

[0067] In another example, the tensile and tear properties of the sample under test can be roughly obtained by reading the ruler.

[0068] In the description of this disclosure, it should be understood that the terms "upper," "lower," "parallel," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0069] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A tensile testing machine, characterized in that, include: A fixed base is provided with a first clamping part on its top surface; The second clamping part is connected to the tensile testing machine, and the second clamping part can move closer to or further away from the first clamping part in a first direction; A protective part is disposed on the fixed base. The protective part is used to define a protective cavity. The two ends of the sample to be tested are respectively connected to the first clamping part and the second clamping part and are located inside the protective cavity. The protective part is slidably connected to the fixed base, and the sliding direction is parallel to the first direction. The protective part moves relative to the first clamping part so that the sample to be tested is always located inside the protective cavity.

2. The tensile testing machine according to claim 1, characterized in that, When the second clamping part moves a first preset distance along the first direction, the protective part moves a second preset distance along the first direction; The first preset distance is twice the second preset distance.

3. The tensile testing machine according to claim 1 or 2, characterized in that, The tensile testing machine also includes a lifting drive unit, which is connected to the protective part and is used to drive the protective part to move in the first direction.

4. The tensile testing machine according to claim 1 or 2, characterized in that, The protective part is connected to the output end of the tensile testing machine.

5. The tensile testing machine according to claim 4, characterized in that, The tensile testing machine is connected to the protective part via a movable pulley mechanism; The movable pulley mechanism includes a pulley and a traction rope wound around the pulley, wherein the protective part is rotatably connected to the pulley, one end of the traction rope is connected to the tensile testing machine, and the other end of the traction rope is connected to the support of the tensile testing machine.

6. The tensile testing machine according to claim 1, characterized in that, The protective part includes a housing and a door. The door is rotatably connected to the housing via a preset pivot. The door rotates around the preset pivot to open or close the protective cavity. At least one of the housing and the door is provided with a magnet, and when the protective cavity is in a closed state, the door and the housing are magnetically connected.

7. The tensile testing machine according to claim 6, characterized in that, The tensile testing machine also includes a limiting mechanism, which includes a limiting pin and a limiting hole. One of the limiting pin and the limiting hole is disposed on the bracket of the tensile testing machine, and the other is disposed on the door. Wherein, when the distance between the first clamping part and the second clamping part is greater than a preset distance, the limiting pin extends into the limiting hole; when the distance between the first clamping part and the second clamping part is less than or equal to the preset distance, the limiting pin separates from the limiting hole.

8. The tensile testing machine according to claim 7, characterized in that, Both the door and the box are equipped with magnets; When the protective cavity is in a closed state, the opposite magnetic poles of the two magnets face each other to form a magnetic attraction force, and the direction of the magnetic attraction force is parallel to the radial direction of the preset rotating shaft.

9. The tensile testing machine according to claim 1, characterized in that, The tensile testing machine also includes a waste container, which is detachably disposed between the fixed base and the first clamping part; or... The waste box is located on the bottom wall of the protective part.

10. The tensile testing machine according to claim 1, characterized in that, The tensile testing machine also includes a scale on the fixed base, the scale increment direction of which is parallel to the first direction, and the scale is used to measure the height of the second clamping part.

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