Sample stretching device

Abstract

The utility model belongs to the technical field of sample detection equipment, and provides a sample stretching device. The sample stretching device comprises two clamping assemblies, and the two clamping assemblies are oppositely arranged in the first direction; the clamping assembly comprises a first clamping body and a second clamping body which are opposite in the second direction, the first clamping body comprises a first containing groove, the first containing groove comprises a first bottom wall and first side walls arranged on the two sides of the first bottom wall in the third direction, clamping plates are arranged on the first side walls, a boss is arranged on the second clamping body, and the first bottom wall and the second bottom wall are oppositely arranged. The boss is opposite to the first bottom wall in the second direction. The first bottom wall and the boss are used for clamping the sample in the second direction, and the clamping plates on the two first side walls are used for clamping the sample in the third direction. According to the sample stretching device provided by the invention, the sample can be reliably clamped, and meanwhile, the sample is prevented from being damaged at the joint of the sample stretching device and the sample.

Description

Technical Field

[0001] The present application relates to the technical field of specimen testing equipment, and particularly to a specimen stretching device. Background Art

[0002] During the development of metal material preparation processes, various mechanical property tests such as stretching, bending, or torsion need to be performed on the prepared metal materials.

[0003] A specimen stretching device can be used to perform stretching tests on materials. Specifically, the stretching device includes a driving member and two clamping heads. The two clamping heads are arranged oppositely, and one of the clamping heads is connected to the driving member. The specimen can be a cylinder, with first threads at both ends of the specimen and second threads in the clamping heads. The two ends of the specimen are respectively threadedly connected to the clamping heads, and the driving member drives one of the clamping heads to move to perform a stretching test on the specimen.

[0004] In the related art, the specimen stretching device is prone to damaging the specimen at the connection with the specimen. Summary of the Utility Model

[0005] The present application provides a specimen stretching device that can reliably clamp the specimen while avoiding damaging the specimen at the connection between the specimen stretching device and the specimen.

[0006] The present application provides a specimen stretching device, including two clamping assemblies arranged oppositely along a first direction; the clamping assembly includes a first clamping body and a second clamping body arranged oppositely along a second direction. The first clamping body includes a first accommodating groove, and the first accommodating groove includes a first bottom wall and first side walls arranged on both sides of the first bottom wall along a third direction. Clamping plates are arranged on the first side walls, and a convex platform is arranged on the second clamping body. The convex platform is opposite to the first bottom wall along the second direction; wherein, an included angle exists between any two of the first direction, the second direction, and the third direction; the first bottom wall and the convex platform are used to clamp the specimen along the second direction, and the clamping plates on the two first side walls are used to clamp the specimen along the third direction.

[0007] In a possible implementation manner, for the specimen stretching device provided by the present application, the first clamping body further includes an elastic member, one end of the elastic member is connected to the clamping plate, and the other end of the elastic member is connected to the first side wall.

[0008] In a possible implementation manner, for the specimen stretching device provided by the present application, the shape of the surface of the clamping plate facing the specimen matches the surface shape of the specimen.

[0009] In a possible implementation manner, for the specimen stretching device provided by the present application, the number of elastic members is multiple, and the multiple elastic members are arranged at equal intervals.

[0010] In a possible implementation, for the specimen tensile device provided in the present application, grids are provided on one side of the clamping plate, the first bottom wall, and the convex platform facing the specimen.

[0011] In a possible implementation, for the specimen tensile device provided in the present application, the clamping assembly further includes a clamping body driving mechanism, and the clamping body driving mechanism is used to drive the second clamping body to move towards or away from the first clamping body.

[0012] In a possible implementation, for the specimen tensile device provided in the present application, a pressure sensor is provided on one of the first bottom wall and the convex platform, and the specimen tensile device further includes a controller, and the pressure sensor is electrically connected to the controller; the pressure sensor is used to monitor the pressure value borne by the specimen along the second direction, a preset pressure value is set in the controller, and when the pressure value is greater than the preset pressure value, the controller is used to issue a warning.

[0013] In a possible implementation, for the specimen tensile device provided in the present application, the clamping assembly further includes a receiving shell, and a second receiving groove is provided in the receiving shell, and both the first clamping body and the second clamping body are located in the second receiving groove.

[0014] In a possible implementation, for the specimen tensile device provided in the present application, the second receiving groove includes a second bottom wall, second side walls provided on both sides of the second bottom wall along the second direction, and an opening opposite to the second bottom wall, and the distance between the two second side walls gradually decreases from the second bottom wall towards the opening, and one side of both the first clamping body and the second clamping body facing the second side wall matches the second side wall.

[0015] In a possible implementation, for the specimen tensile device provided in the present application, the specimen tensile device further includes a clamping assembly driving mechanism and a base, the clamping assembly driving mechanism is connected to the receiving shell in one clamping assembly, the base is connected to the receiving shell in the other clamping assembly, and the clamping assembly driving mechanism is used to drive the clamping assembly connected thereto to move along the first direction.

[0016] The specimen tensile device provided by this application is provided with two clamping components, and the two clamping components are arranged opposite to each other along the first direction; the clamping component includes a first clamping body and a second clamping body that are opposite to each other along the second direction. The first clamping body includes a first receiving groove, and the first receiving groove includes a first bottom wall and first side walls arranged on both sides of the first bottom wall along the third direction. Clamping plates are arranged on the first side walls, and a convex platform is arranged on the second clamping body. The convex platform is opposite to the first receiving groove along the second direction; the first bottom wall and the convex platform are used to clamp the specimen along the second direction, and the clamping plates on the two first side walls are used to clamp the specimen along the third direction. When clamping the specimen, all four sides of the specimen can be clamped. Therefore, the contact area between the clamping component and the specimen can be increased, and further, the friction between the clamping component and the specimen can be increased, so that the clamping component can reliably clamp the specimen. In addition, placing the specimen in the first receiving groove can also avoid machining threads or other types of clamping parts at the clamping position of the specimen, so that the specimen can be kept intact. Therefore, damage to the specimen during the test can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Structural schematic of the specimen tensile device provided by the embodiment of the present application Figure 1 ;

[0019] Figure 2 Usage state diagram of the specimen tensile device provided by the embodiment of the present application;

[0020] Figure 3 Cooperation schematic of the clamping component and the specimen in the specimen tensile device provided by the embodiment of the present application Figure 1 ;

[0021] Figure 4 Structural schematic of the specimen;

[0022] Figure 5 Cooperation schematic of the clamping component and the specimen in the specimen tensile device provided by the embodiment of the present application Figure 2 ;

[0023] Figure 6 Cooperation schematic of the clamping component and the specimen in the specimen tensile device provided by the embodiment of the present application Figure 3 ;

[0024] Figure 7Schematic diagram of the cooperation between the clamping assembly and the specimen in the specimen tensile device provided by the embodiment of the present application Figure 4 ;

[0025] Figure 8 Schematic diagram of the structure of the specimen tensile device provided by the embodiment of the present application Figure 2 。

[0026] Description of reference numerals:

[0027] 100 - Specimen tensile device;

[0028] 110 - Clamping assembly; 110a - First clamping assembly; 110b - Second clamping assembly;

[0029] 111 - First clamping body; 1111 - First receiving groove; 1112 - First bottom wall; 1113 - First side wall; 1114 - Clamping plate; 1115 - Elastic member;

[0030] 112 - Second clamping body; 1121 - Boss; 1121a - Grid; 1121b - Pressure sensor;

[0031] 113 - Receiving shell; 1131 - Second receiving groove; 1132 - Second bottom wall; 1133 - Second side wall; 1134 - Opening;

[0032] 114 - Clamping body driving mechanism;

[0033] 120 - Controller;

[0034] 130 - Clamping assembly driving mechanism;

[0035] 140 - Base;

[0036] 200 - Specimen; 210 - First side; 220 - Second side; 230 - Third side; 240 - Top surface; 250 - Bottom surface;

[0037] X - First direction;

[0038] Y - Second direction;

[0039] Z - Third direction. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0043] The terms "first", "second", "third" (if any) in the description, claims and drawings of the present application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0044] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or maintenance tool that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or maintenance tools.

[0045] In the development process of metal material preparation technology, various mechanical property tests such as tensile, bending or torsion tests need to be carried out on the prepared metal materials.

[0046] A specimen tensile device can be used to perform tensile tests on materials. The tensile device includes a driving member and two clamping heads, the two clamping heads are arranged oppositely, and one of the clamping heads is connected to the driving member.

[0047] The specimen can be a cylinder. Specifically, the specimen can be a cylinder, a cuboid, or a cylinder with other shapes on its outer periphery. When the specimen is a cylinder, external threads can be provided at the end of the specimen, and internal threads are provided in the clamping head. By screwing the end of the specimen into the clamping head, the specimen can be connected to the clamping head. Alternatively, internal threads can be provided at the end of the specimen, and external threads are provided on the clamping head, and the clamping head is screwed into the end of the specimen. When the specimen is a cuboid or a cylinder with other shapes on its outer periphery, only internal threads can be provided at the end of the specimen, and external threads are provided in the clamping head, and the clamping head is screwed into the end of the specimen.

[0048] Then, the driving member drives one of the clamping heads to move to perform a tensile test on the specimen, and thus the tensile test on the specimen can be carried out.

[0049] Processing threads at the end of the specimen, especially processing internal threads at the end of the specimen, will reduce the strength of the specimen, making it easy to damage the specimen at the connection between the clamping head and the specimen, which will reduce the accuracy of the test results. In severe cases, the specimen will break at the end, resulting in the failure of the test.

[0050] Based on this, the present application provides a specimen tensile device, which can reliably clamp the specimen while avoiding damaging the specimen at the connection between the specimen tensile device and the specimen.

[0051] Figure 1 Structural schematic of the specimen tensile device provided by an embodiment of the present application Figure 1 ; Figure 2 Usage state diagram of the specimen tensile device provided by an embodiment of the present application; Figure 3 Cooperating schematic of the clamping assembly and the specimen in the specimen tensile device provided by an embodiment of the present application Figure 1 ; Figure 4 Structural schematic of the specimen.

[0052] See Figures 1 to 4As shown in the figure, the specimen tensile device 100 provided by the embodiment of the present application includes two clamping components 110, and the two clamping components 110 are arranged oppositely along the first direction X; the clamping component 110 includes a first clamping body 111 and a second clamping body 112 that are opposite along the second direction Y. The first clamping body 111 includes a first accommodating groove 1111, and the first accommodating groove 1111 includes a first bottom wall 1112 and first side walls 1113 arranged on both sides of the first bottom wall 1112 along the third direction Z. A clamping plate 1114 is arranged on the first side wall 1113, and a boss 1121 is arranged on the second clamping body 112. The boss 1121 is opposite to the first bottom wall 1112 along the second direction Y; wherein, an angle exists between any two of the first direction X, the second direction Y, and the third direction Z; the first bottom wall 1112 and the boss 1121 are used to clamp the specimen 200 along the second direction Y, and the clamping plates 1114 on the two first side walls 1113 are used to clamp the specimen 200 along the third direction Z.

[0053] Specifically, the two clamping components 110 are respectively a first clamping component 110a and a second clamping component 110b. The first clamping component 110a and the second clamping component 110b are arranged oppositely along the first direction X. The first clamping component 110a clamps one end of the specimen 200, and the second clamping component 110b clamps the other end of the specimen 200. Then, the first clamping component 110a is moved away from the second clamping component 110b to perform a tensile test on the specimen 200.

[0054] The specimen 200 can be a cylinder, a cuboid, or a column with other shapes on the outer periphery. In the Figure 2 and Figure 4 embodiment shown in the figure, the specimen 200 is a cuboid. The specimen 200 includes a first side surface 210, a second side surface 220, a third side surface 230, a fourth side surface (not marked in the figure), a top surface 240, and a bottom surface 250. When the specimen 200 is installed in the specimen tensile device 100, the first side surface 210 and the third side surface 230 are opposite along the second direction Y, the second side surface 220 and the fourth side surface are opposite along the third direction, and the top surface 240 and the bottom surface 250 are opposite along the first direction X.

[0055] Both the first clamping component 110a and the second clamping component 110b include a first clamping body 111 and a second clamping body 112, and the structures of the first clamping body 111 and the second clamping body 112 in the first clamping component 110a and the second clamping component 110b are the same. Below, one of the clamping components 110 will be taken as an example for illustration.

[0056] Please continue to refer to Figure 3As shown, the direction in which the first clamping body 111 and the second clamping body 112 are arranged is the second direction Y. One side of the first clamping body 111 facing the second clamping body 112 is recessed to form a first receiving groove 1111. The first receiving groove 1111 includes a first bottom wall 1112 and first side walls 1113 arranged on both sides of the first bottom wall 1112 along the third direction Z. Among them, in the embodiment of the present application, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. A clamping plate 1114 is mounted on the first side wall 1113, and the clamping plate 1114 is detachably connected to the first side wall 1113. A boss 1121 is provided on one side of the second clamping body 112 facing the first clamping body 111.

[0057] Please continue to refer to Figure 2 As shown, when clamping the specimen 200, first, place the end of the specimen 200 in the first receiving groove 1111, such that the first side surface 210 of the specimen 200 faces the first bottom wall 1112, the second side surface 220 and the fourth side surface of the specimen 200 face the two first side walls 1113 respectively, and the third side surface 230 of the specimen 200 faces the boss 1121. At this time, the clamping plates 1114 on the two first side walls 1113 respectively abut against the second side surface 220 and the fourth side surface, such that the clamping plates 1114 on the two first side walls 1113 clamp the specimen 200 along the third direction Z.

[0058] It should be noted that the dimension of the specimen 200 along the second direction Y may be greater than the dimension of the first side wall 1113 along the second direction Y. At this time, a part of the specimen 200 is located in the first receiving groove 1111. The dimension of the specimen 200 along the second direction Y may also be less than or equal to the dimension of the first side wall 1113. At this time, the specimen 200 is entirely located in the first receiving groove 1111.

[0059] Then, move the second clamping body 112 along the second direction Y towards the first clamping body 111. The boss 1121 on the second clamping body 112 abuts against the third side surface 230 of the specimen 200, and the first bottom wall 1112 in the first clamping body 111 abuts against the first side surface 210, such that the boss 1121 and the first bottom wall 1112 clamp the specimen 200 along the second direction Y.

[0060] Finally, the first clamping assembly 110a and the second clamping assembly 110b stretch the specimen 200 along the first direction X.

[0061] Since the first receiving groove 1111 is provided in the first clamping body 111, the clamping plates 1114 are provided on two first side walls 1113 of the first receiving groove 1111, and the boss 1121 is provided in the second clamping body 112, when clamping the specimen 200, all four sides of the specimen 200 can be clamped. Thus, the contact area between the clamping assembly 110 and the specimen 200 can be increased, and further, the friction force between the clamping assembly 110 and the specimen 200 can be increased, so that the clamping assembly 110 can reliably clamp the specimen 200. In addition, placing the specimen 200 in the first receiving groove 1111 can also avoid machining threads or other types of clamping portions at the clamping position of the specimen 200, so that the specimen 200 can be kept intact. Thus, damage to the specimen during the test can be avoided.

[0062] The specimen tensile device 100 provided by the embodiment of the present application includes two clamping assemblies 110 which are oppositely arranged along the first direction X; the clamping assembly 110 includes a first clamping body 111 and a second clamping body 112 which are opposite to each other along the second direction Y. The first clamping body 111 includes a first receiving groove 1111, the first receiving groove 1111 includes a first bottom wall 1112 and first side walls 1113 arranged on both sides of the first bottom wall 1112 along the third direction Z. Clamping plates 1114 are provided on the first side walls 1113, a boss 1121 is provided on the second clamping body 112, and the boss 1121 is opposite to the first bottom wall 1112 along the second direction Y; the first bottom wall 1112 and the boss 1121 are used to clamp the specimen 200 along the second direction Y, and the clamping plates 1114 on the two first side walls 1113 are used to clamp the specimen 200 along the third direction Z. When clamping the specimen 200, all four sides of the specimen 200 can be clamped. Thus, the contact area between the clamping assembly 110 and the specimen 200 can be increased, and further, the friction force between the clamping assembly 110 and the specimen 200 can be increased, so that the clamping assembly 110 can reliably clamp the specimen 200. In addition, placing the specimen 200 in the first receiving groove 1111 can also avoid machining threads or other types of clamping portions at the clamping position of the specimen 200, so that the specimen 200 can be kept intact. Thus, damage to the specimen during the test can be avoided.

[0063] Please continue to refer to Figure 3 As shown, the first clamping body 111 further includes an elastic member 1115. One end of the elastic member 1115 is connected to the clamping plate 1114, and the other end of the elastic member 1115 is connected to the first side wall 1113.

[0064] The elastic member 1115 can be a helical spring, an elastic sleeve or other types of elastic members. One end of the elastic member 1115 along its elastic force direction is connected to the clamping plate 1114, and the other end of the elastic member 1115 along its elastic force direction is connected to the first side wall 1113.

[0065] When placing the specimen 200 in the first receiving groove 1111, press one or both of the clamping plates 1114 so that the distance between the two clamping plates 1114 is greater than the distance between the second side surface 220 and the fourth side surface of the specimen 200, facilitating the insertion of the specimen 200. Then release the clamping plates 1114, and the resilience of the elastic member 1115 can cause the two clamping plates 1114 to abut against the second side surface 220 and the fourth side surface respectively, to clamp the specimen 200 along the third direction Z. By providing the elastic member 1115, it is convenient to pick up and hold the specimen 200 and the cost of providing the elastic member 1115 is relatively low.

[0066] In other embodiments, a driving motor may also be provided on the clamping plate 1114. The rotating shaft of the driving motor can be connected to a lead screw. A slider is provided on the clamping plate 1114, and the slider is threadedly connected to the lead screw. When the rotating shaft of the driving motor rotates, the clamping plate 1114 is driven to move through the slider, so that the two clamping plates 1114 can clamp the specimen 200 along the third direction Z.

[0067] The number of the elastic members 1115 can be one or multiple. The multiple elastic members 1115 are arranged at uniform intervals. Figure 3 Two elastic members 1115 are shown. Providing multiple elastic members 1115 can not only increase the resilience, but also make the force exerted by the clamping plate 1114 on the specimen 200 more uniform, enabling the clamping plate 1114 to clamp the specimen 200 more reliably along the third direction Z.

[0068] Figure 5 Schematic diagram of the cooperation between the clamping assembly and the specimen in the specimen stretching device provided by the embodiment of the present application Figure 2 。

[0069] See Figure 5 As shown, the shape of the surface of the clamping plate 1114 facing the specimen 200 matches the surface shape of the specimen 200.

[0070] The cross-section of some specimens 200 can be polygonal. Figure 5 In [the figure], the cross-section of the specimen 200 is hexagonal, and the shape of the surface of the clamping plate 1114 facing the specimen 200 matches the shape of two sides of the specimen 200. Thus, the contact area between the clamping plate 1114 and the specimen 200 can be further increased, and further, the friction force between the clamping assembly 110 and the specimen 200 can be increased, enabling the clamping assembly 110 to clamp the specimen 200 reliably.

[0071] Figure 6 Schematic diagram of the cooperation between the clamping assembly and the specimen in the specimen stretching device provided by the embodiment of the present application Figure 3 。

[0072] SeeFigure 6 As shown, in a possible implementation, grids 1121a are provided on one side of the clamping plate 1114, the first bottom wall 1112, and the boss 1121 facing the specimen 200.

[0073] Among them, Figure 6 only the grid 1121a is schematically shown on the side of the boss 1121 facing the specimen 200. The provision of the grid 1121a makes the surface of the boss 1121 relatively rough. Therefore, the friction between the clamping plate 1114, the first bottom wall 1112, the boss 1121 and the specimen 200 can be further increased.

[0074] Please continue to refer to Figure 1 and Figure 2 As shown, the clamping assembly 110 further includes a clamping body driving mechanism 114, and the clamping body driving mechanism 114 is used to drive the second clamping body 112 to move toward or away from the first clamping body 111.

[0075] The clamping body driving mechanism 114 can be a driving motor, a hydraulic driving mechanism or a pneumatic driving mechanism. The clamping body driving mechanism 114 can drive the second clamping body 112 to move toward the first clamping body 111 to clamp the specimen 200; the clamping body driving mechanism 114 can also drive the second clamping body 112 to move away from the first clamping body 111 or move, so as to facilitate the removal of the specimen 200 from the first receiving groove 1111.

[0076] Figure 7 Schematic diagram of the cooperation between the clamping assembly and the specimen in the specimen stretching device provided by the embodiment of the present application Figure 4 .

[0077] Refer to Figure 7 As shown, a pressure sensor 1121b is provided on one of the first bottom wall 1112 and the boss 1121. The specimen stretching device 100 further includes a controller 120, and the pressure sensor 1121b is electrically connected to the controller 120; the pressure sensor 1121b is used to monitor the pressure value borne by the specimen 200 along the second direction Y. A preset pressure value is set in the controller 120. When the pressure value is greater than the preset pressure value, the controller 120 is used to issue a warning.

[0078] In Figure 7 , the pressure sensor 1121b is provided on the surface of the boss 1121 facing the first receiving groove 1111. When the clamping body driving mechanism 114 drives the second clamping body 112 to move toward the first clamping body 111 to clamp the specimen 200, the pressure borne by the specimen 200 increases as the second clamping body 112 moves. When the pressure borne by the specimen 200 is too large, the specimen will be damaged before the tensile test starts, thus affecting the accuracy of the test results.

[0079] By setting the pressure sensor 1121b, the pressure value borne by the specimen 200 can be detected. A preset pressure value is set in the controller 120, and the preset pressure value can be set according to the bearing capacity of specimens 200 made of different materials. The controller 120 includes a comparator and a warning device, and the comparator is electrically connected to the warning device. The pressure value measured by the pressure sensor 1121b is transmitted to the controller 120. The comparator in the controller 120 compares the pressure value with the preset pressure value, and the comparator transmits the comparison result to the warning device. When the pressure value is greater than the preset pressure value, the warning device issues a warning. Thus, the operator can fine-tune the stroke of the second clamping body 112 according to the warning of the controller 120.

[0080] Figure 8 Structural schematic of the specimen stretching device provided by the embodiment of the present application Figure 2 。

[0081] See Figure 8 As shown, the clamping assembly 110 further includes a receiving shell 113. A second receiving groove 1131 is provided in the receiving shell 113, and both the first clamping body 111 and the second clamping body 112 are located in the second receiving groove 1131.

[0082] The receiving shell 113 is used to support and accommodate the first clamping body 111 and the second clamping body 112. A second receiving groove 1131 is provided in the receiving shell 113, and the first clamping body 111 and the second clamping body 112 are oppositely arranged along the second direction Y in the second receiving groove 1131. It should be noted that a through hole for the clamping body driving mechanism 114 to pass through needs to be provided in the receiving shell 113.

[0083] Please continue to see Figure 8 As shown, the second receiving groove 1131 includes a second bottom wall 1132, second side walls 1133 arranged on both sides of the second bottom wall 1132 along the second direction Y, and an opening 1134 opposite to the second bottom wall 1132. The distance between the two second side walls 1133 gradually decreases from the second bottom wall 1132 towards the opening 1134, and one side of both the first clamping body 111 and the second clamping body 112 facing the second side walls 1133 matches the second side walls 1133.

[0084] The distance between the two second side walls 1133 gradually decreases from the second bottom wall 1132 towards the opening 1134, that is to say, the two second side walls 1133 gradually incline towards each other from the second bottom wall 1132 to the opening 1134.

[0085] The surface of the first clamping body 111 facing the adjacent second side wall 1133 has the same inclination angle as that of the second side wall 1133, and the surface of the second clamping body 112 facing the adjacent second side wall 1133 has the same inclination angle as that of the second side wall 1133. With such a setting, the first clamping body 111 and the second clamping body 112 can be restricted in the second receiving groove 1131 without structural members.

[0086] Please continue to refer to Figure 8 As shown, the specimen tensile device 100 further includes a clamping assembly driving mechanism 130 and a base 140. The clamping assembly driving mechanism 130 is connected to the receiving shell 113 in a clamping assembly 110, and the base 140 is connected to the receiving shell 113 in the other clamping assembly 110. The clamping assembly driving mechanism 130 is configured to drive the clamping assembly 110 connected thereto to move along the first direction X.

[0087] The first clamping assembly 110a is connected to the clamping assembly driving mechanism 130, and the second clamping assembly 110b is disposed on the base 140. The base 140 can be mounted on the ground or a test bench, and the clamping assembly driving mechanism 130 can be a driving motor, a hydraulic driving mechanism or a pneumatic driving mechanism. After the specimen 200 is clamped by the first clamping assembly 110a and the second clamping assembly 110b, the clamping assembly driving mechanism 130 drives the first clamping assembly 110a to move away from the second clamping assembly 110b along the first direction X, so as to perform a tensile test on the specimen 200. When the lengths of the specimens 200 are different, the clamping assembly driving mechanism 130 can also drive the first clamping assembly 110a to move along the first direction X toward or away from the second clamping assembly 110b to adjust the distance between the first clamping assembly 110a and the second clamping assembly 110b, so as to adapt to specimens 200 of different lengths.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sample stretching device, characterized in that: It comprises two clamping assemblies, and the two clamping assemblies are arranged opposite to each other along a first direction; The clamping assembly comprises a first clamping body and a second clamping body opposite to each other along a second direction, the first clamping body comprises a first accommodating groove, the first accommodating groove comprises a first bottom wall and first side walls arranged on both sides of the first bottom wall along a third direction, a clamping plate is arranged on the first side wall, and a boss is arranged on the second clamping body, the boss is opposite to the first bottom wall in the second direction; wherein, an angle is formed between any two of the first direction, the second direction and the third direction; The first bottom wall and the boss are used to clamp the sample along the second direction, and the clamping plates on the two first side walls are used to clamp the sample along the third direction.

2. The sample stretching device according to claim 1, characterized in that: The first clamping body further includes an elastic member, one end of the elastic member is connected to the clamping plate, and the other end of the elastic member is connected to the first side wall.

3. The sample stretching device according to claim 2, characterized in that: The shape of one side of the clamping plate facing the sample matches the surface shape of the sample.

4. The sample stretching device according to claim 2, characterized in that: There are multiple elastic members, and the multiple elastic members are evenly spaced.

5. The sample stretching device according to claim 3, characterized in that: The clamping plate, the first bottom wall and the side of the boss facing the sample are all provided with grids.

6. The sample stretching device according to any one of claims 1 to 5, characterized in that: The clamping assembly further includes a clamping body driving mechanism, and the clamping body driving mechanism is used to drive the second clamping body to move toward or away from the first clamping body.

7. The sample stretching device according to claim 6, characterized in that: A pressure sensor is provided on one of the first bottom wall and the boss, and the sample stretching device also includes a controller, and the pressure sensor is electrically connected to the controller; the pressure sensor is used to monitor the pressure value borne by the sample along the second direction, and a preset pressure value is set in the controller. When the pressure value is greater than the preset pressure value, the controller is used to issue an early warning.

8. The sample stretching device according to any one of claims 1 to 5, characterized in that: The clamping assembly further comprises a housing shell having a second housing groove therein, and the first clamping body and the second clamping body are both located in the second housing groove.

9. The sample stretching device according to claim 8, characterized in that: The second accommodating groove includes a second bottom wall, second side walls arranged on both sides of the second bottom wall along the second direction, and an opening opposite to the second bottom wall. The distance between the two second side walls gradually decreases from the second bottom wall toward the opening, and one side of the first clamping body and the second clamping body facing the second side wall are matched with the second side wall.

10. The sample stretching device according to claim 9, characterized in that: The sample stretching device also includes a clamping assembly driving mechanism and a base, wherein the clamping assembly driving mechanism is connected to the containing shell in one of the clamping assemblies, and the base is connected to the containing shell in another of the clamping assemblies, and the clamping assembly driving mechanism is used to drive the clamping assembly connected thereto to move along the first direction.

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