Tension testing machine capable of stably clamping

Abstract

The utility model relates to the technical field of tensile testing machines, and discloses a tensile testing machine capable of stably clamping, which comprises a tensile machine body, and an upper clamp and a lower clamp which are connected in the tensile machine body, according to the utility model, the two symmetrical fixed clamping plates are arranged at the top of the clamp, and the springs on the back surfaces of the fixed clamping plates are utilized, so that a workpiece can be always kept at a central position after being clamped by the fixed clamping plates, and therefore, people can conveniently clamp the central position of the workpiece, and the influence on subsequent measurement data due to the fact that the workpiece is not centered is avoided; through the arrangement of the movable clamping plate, when a workpiece is clamped by the clamping plate of the clamp left and right, the workpiece can be centered left and right through the left and right movement of the movable clamping plate, the workpiece is ensured to be in a centered state in all directions, and the accuracy of the workpiece during detection is improved; and the groove in the movable clamping plate can increase the friction force when the workpiece is clamped, so that the clamping of the workpiece is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile testing machines, in particular to a tensile testing machine capable of stably clamping. Background Art

[0002] A tensile testing machine is a device specifically used to test the tensile properties of materials, also known as a tensile testing machine or a tensile strength testing machine. It is usually used to determine mechanical property parameters such as the tensile strength, yield point, and fracture point of materials to evaluate the quality and reliability of materials.

[0003] The tensile testing machine includes a frame, two tooling clamps movably arranged on the frame, a displacement sensor, a control system, etc. When in use, the lower end of the workpiece is clamped by the tooling clamp, and the top of the workpiece is clamped by the upper tooling clamp. Subsequently, the machine is started to realize the performance detection of the workpiece.

[0004] For example, a tensile testing machine disclosed in the patent with the patent publication number CN212459167U includes a machine base, a first clamping assembly, a second clamping assembly, a sensing unit, and a driving device. The machine base is provided with a gantry mounting frame; the first clamping assembly is arranged on the gantry mounting frame; the second clamping assembly includes a moving seat, a mounting assembly, a pushing member, a first clamping finger, and a second clamping finger. The moving seat is slidably connected to the column of the gantry mounting frame. The mounting assembly is arranged on the moving seat. The mounting assembly is provided with an open cavity. The first clamping finger and the second clamping finger are respectively slidably connected in the open cavity. The output ends of the pushing member are respectively drivingly connected to the first clamping finger and the second clamping finger; the sensing unit is connected to the mounting assembly; the output end of the driving device is drivingly connected to the moving seat. In this tensile testing machine, the first clamping finger and the second clamping finger move synchronously, thereby improving the test accuracy of the tensile testing machine.

[0005] Although the above device solves the problem of stable clamping of the workpiece by synchronous movement of the clamping fingers and improves the test accuracy, there are still certain defects. When the workpiece in the tensile testing machine is clamped by the tooling clamp, in addition to ensuring that the workpiece is centered left and right, it is also necessary to ensure that the workpiece is centered front and back. However, in the process of clamping the workpiece by the existing tooling clamps, the centering position of the workpiece is judged manually. If the workpiece is not stably clamped in the centered position, it will cause a certain degree of influence on the subsequent test results, resulting in inconvenience. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a tensile testing machine capable of stably clamping, so that the tooling can ensure that the workpiece is centered when clamping the workpiece.

[0007] To achieve the above object, the present utility model provides the following technical solution: A tensile testing machine capable of stable clamping, comprising a tensile machine body and two upper and lower clamps connected inside the tensile machine body. A regulating component is connected to the top surface of the clamp located at the bottom. The regulating component includes two L-shaped connecting rods, which are respectively connected to both sides of the outer wall of the clamp. Fixing plates are fixedly connected to the tops of the L-shaped connecting rods. A fixed clamping plate is connected to one side of the fixing plate. A spring is fixedly connected to the back of the fixed clamping plate, and the other end of the spring is fixedly connected to the outer wall of the fixing plate. The two fixed clamping plates are symmetrically arranged, and moving parts are connected to the outer walls of both fixed clamping plates.

[0008] Further, the moving part includes a moving clamping plate. A sliding plate is fixedly connected to the back of the moving clamping plate. A moving groove corresponding to the position of the sliding plate is provided on one side of the fixed clamping plate.

[0009] Further, a plurality of grooves are provided on the outer wall of the moving clamping plate.

[0010] Further, two groups of balls are rotatably embedded in the back of the sliding plate. The two groups of balls are slidably connected and rotatably connected to the bottom surface of the moving groove.

[0011] Further, an extension plate is fixedly connected to the top of the back of the fixed clamping plate located outside the operation surface of the tensile machine body. A limiting plate is slidably connected inside the extension plate. The limiting plate is arranged as an L-shaped plate.

[0012] Further, the bottom of the side of the limiting plate away from the fixed clamping plate is inclined.

[0013] Further, two positioning rods are fixedly connected to the side of the fixed clamping plate away from the moving clamping plate. The positioning rods are located in the middle of the spring, and one end penetrates through the fixing plate and is slidably connected to it.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] 1. By arranging two symmetrical fixed clamping plates on the top of the clamp and using the spring on the back of the fixed clamping plate, the present utility model enables the workpiece to always maintain a centered position after being clamped by the fixed clamping plate, which facilitates people to clamp the workpiece at the centered position and avoids the influence of non-centered workpieces on subsequent measurement data. This structure is simple, easy to operate, and highly practical.

[0016] 2. Through the setting of the moving clamping plate, when the workpiece is clamped left and right by the clamping plates of the clamp, the workpiece can be centered left and right by the left and right movement of the moving clamping plate, ensuring that the workpiece is centered in the front, back, left, and right directions, and improving the accuracy of the workpiece during detection; the grooves on the moving clamping plate can increase the friction force when the workpiece is clamped, ensuring more stable clamping of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall three-dimensional structure of the present utility model;

[0018] Figure 2 Schematic diagram of the three-dimensional structure of the fixture and the adjustment component of the present utility model;

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the adjustment component of the present utility model;

[0020] Figure 4 Schematic diagram of the three-dimensional sectional structure of the fixed clamping plate and the movable clamping plate of the present utility model;

[0021] Figure 5 Schematic diagram of the three-dimensional sectional structure of the fixed clamping plate of the present utility model.

[0022] In the figure: 1. Tensile testing machine body; 2. Fixture; 3. Adjustment component; 301. L connecting rod; 302. Fixed plate; 303. Fixed clamping plate; 3031. Moving groove; 304. Spring; 4. Positioning rod; 5. Limiting plate; 6. Movable clamping plate; 61. Slide plate; 611. Ball; 7. Extension plate. Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] As Figures 1 to 5 shown, a tensile testing machine capable of stably clamping includes a tensile testing machine body 1 and two upper and lower fixtures 2 connected inside the tensile testing machine body 1. The top surface of the fixture 2 at the bottom is connected with an adjustment component 3. The adjustment component 3 includes two L connecting rods 301, and the two L connecting rods 301 are respectively connected to both sides of the outer wall of the fixture 2. The tops of the L connecting rods 301 are fixedly connected with fixed plates 302. One side of the fixed plate 302 is connected with a fixed clamping plate 303. The back of the fixed clamping plate 303 is fixedly connected with a spring 304, and the other end of the spring 304 is fixedly connected to the outer wall of the fixed plate 302. The two fixed clamping plates 303 are symmetrically arranged, and moving parts are connected to the outer walls of the two fixed clamping plates 303.

[0025] As Figure 1 shown, the tensile testing machine capable of stably clamping in the present utility model is similar in structure to the existing oil-water separator. For example, a patent with the publication number CN212459167U discloses a tensile testing machine. The main improvement point of the present utility model is to ensure that the workpiece is centered when the tooling clamps the workpiece. As Figures 1 to 5As shown, when the stable clamping tensile testing machine of the present utility model is in use, when the user clamps a workpiece, one hand can pull the outer fixed clamping plate 303 outward so that the workpiece is clamped between the two fixed clamping plates 303. At this time, the bottom of the workpiece should be inserted between the two clamping plates of the fixture 2 to facilitate the clamping of the workpiece by the fixture 2. At this time, by using the elasticity of the springs 304 on the back of the two fixed clamping plates 303, the workpiece can be clamped at the center position in the front and back of the fixture 2. Finally, the fixture 2 clamps the workpiece, and at this time, the front and back positions of the workpiece can be kept centered.

[0026] By arranging two symmetrical fixed clamping plates 303 on the top of the fixture 2 and using the springs 304 on the back of the fixed clamping plates 303, after the workpiece is clamped by the fixed clamping plates 303, it can always be kept at the center position, which facilitates people to clamp the workpiece at the center position and avoids the influence on subsequent measurement data caused by the workpiece not being centered.

[0027] As Figure 2 、 Figure 4 and Figure 5 shown, the moving part includes a moving clamping plate 6. A sliding plate 61 is fixedly connected to the back of the moving clamping plate 6, and a moving groove 3031 corresponding to the position of the sliding plate 61 is formed on one side of the fixed clamping plate 303.

[0028] As Figure 2 、 Figure 4 and Figure 5 shown, a plurality of grooves are formed on the outer wall of the moving clamping plate 6.

[0029] Specifically, when the workpiece is being clamped by the clamping plates of the fixture 2, since the clamping plates of the fixture 2 itself move synchronously towards the middle, when the clamping plates of the fixture 2 displace towards the middle, in order to ensure that the fixed clamping plate 303 does not affect the left - right centering of the workpiece. Therefore, when the workpiece moves towards the middle, if the workpiece is not centered left - right, after being pushed, the workpiece will drive the moving clamping plate 6 to move left or right. When the moving clamping plate 6 moves, it drives the sliding plate 61 on its back to move in the moving groove 3031; through the setting of the moving clamping plate 6, when the workpiece is clamped left - right by the clamping plates of the fixture 2, the workpiece can achieve left - right centering through the left - right movement of the moving clamping plate 6, ensuring that the workpiece is in a centered state in the front, back, left, and right directions, improving the accuracy of the workpiece during detection; and the grooves on the moving clamping plate 6 can increase the friction force when the workpiece is clamped, ensuring more stable clamping of the workpiece.

[0030] As Figure 4 and Figure 5 shown, two groups of balls 611 are rotatably embedded in the back of the sliding plate 61, and the two groups of balls 611 are slidably and rotatably connected to the bottom surface of the moving groove 3031.

[0031] Specifically, when the moving clamping plate 6 moves, the sliding plate 61 drives the ball 611 to slide and rotate in the bottom wall of the moving groove 3031. This setting can convert the sliding friction of the sliding plate 61 into rolling friction, improving the smoothness of the movement of the moving clamping plate 6.

[0032] As Figure 2 , Figure 4 and Figure 5 shown, a extension plate 7 is fixedly connected to the top of the back surface of the fixed clamping plate 303 located outside the operation surface of the tensile testing machine body 1. A limiting plate 5 is slidably connected inside the extension plate 7, and the limiting plate 5 is arranged as an L-shaped plate.

[0033] Specifically, after the bottom of the workpiece is clamped, the workpiece can be kept in a vertical state, and its top is clamped with the fixture 2. Then, in order to prevent the two fixtures 2 from being affected during pulling, the outer fixed clamping plate 303 can be pulled until the limiting plate 5 in the moving extension plate 7 is close to one side of the fixed plate 302. At this time, the limiting plate 5 is moved upward, and the fixed clamping plate 303 is continuously moved. Then, the limiting plate 5 is moved downward and inserted into the outer wall of the fixed plate 302. At this time, the position of the fixed clamping plate 303 is limited and separated from the workpiece, ensuring that the workpiece will not be affected by the clamping of the two fixed clamping plates 303 during the tensile test.

[0034] As Figure 4 and Figure 5 shown, the bottom of the side of the limiting plate 5 away from the fixed clamping plate 303 is inclined. By setting its bottom to an inclined state, when the limiting plate 5 moves to one side of the fixed plate 302, under the guidance of the inclined state, the limiting plate 5 can be actively moved upward during the sliding in the extension plate 7. When the limiting plate 5 loses its limit, it will gradually move downward to the outer wall of the fixed plate 302. This setting makes it more convenient to limit the position of the fixed clamping plate 303.

[0035] As Figure 1 , Figure 2 and Figure 3 shown, two positioning rods 4 are fixedly connected to the side of the fixed clamping plate 303 away from the moving clamping plate 6. The positioning rods 4 are located in the middle of the spring 304, and one end passes through the fixed plate 302 and is slidably connected to it.

[0036] Specifically, when the fixed clamping plate 303 moves backward or forward, the spring 304 will be compressed or stretched accordingly. In order to ensure that the spring 304 will not deform, the positioning rod 4 is located in the middle of the spring 304. When the fixed clamping plate 303 moves, the positioning rod 4 moves with it on the fixed plate 302. This setting ensures that the spring 304 does not deform and increases the service life of the fixed clamping plate 303. When the elastic coefficient of the spring 304 changes, corresponding replacement is required to ensure that the clamped workpiece is centered.

[0037] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tensile testing machine capable of stable clamping, comprising a tensile testing machine body (1) and two upper and lower clamps (2) connected to the tensile testing machine body (1), characterized in that: The top surface of the clamp (2) located at the bottom is connected to an adjustment component (3), and the adjustment component (3) includes two L-connecting rods (301), and the two L-connecting rods (301) are respectively connected to the two sides of the outer wall of the clamp (2), and the top of the L-connecting rod (301) is fixedly connected to a fixed plate (302), one side of the fixed plate (302) is connected to a fixed clamp (303), and the back of the fixed clamp (303) is fixedly connected to a spring (304), and the other end of the spring (304) is fixedly connected to the outer wall of the fixed plate (302), and the two fixed clamps (303) are symmetrically arranged, and the outer walls of the two fixed clamps (303) are connected to movable parts.

2. A stable clamping tensile testing machine according to claim 1, characterized in that: The moving member comprises a moving clamp (6), the back side of the moving clamp (6) is fixedly connected with a slide plate (61), and one side of the fixed clamp (303) is provided with a moving groove (3031) corresponding to the position of the slide plate (61).

3. A stably clamped tensile testing machine according to claim 2, characterized in that: The outer wall of the movable clamping plate (6) is provided with a plurality of grooves.

4. A stably clamped tensile testing machine according to claim 2 or 3, characterized in that: Two groups of balls (611) are rotatably embedded on the back of the slide plate (61), and the two groups of balls (611) are slidably and rotatably connected to the bottom surface of the movable groove (3031).

5. A stably clampable tensile testing machine according to claim 1, 2 or 3, characterized in that: An extension plate (7) is fixedly connected to the top of the back side of the fixed clamping plate (303) located outside the operating surface of the tensile machine body (1), and a limit plate (5) is slidably connected inside the extension plate (7), and the limit plate (5) is an L-shaped plate.

6. A stable clamping tensile testing machine according to claim 5, characterized in that: The bottom of the limiting plate (5) away from the fixed clamping plate (303) is inclined.

7. A stably clampable tensile testing machine according to claim 1, 2, 3 or 6, characterized in that: The fixed clamping plate (303) is fixedly connected to two positioning rods (4) on one side away from the movable clamping plate (6). The positioning rod (4) is located in the middle of the spring (304), and one end of the positioning rod passes through the fixed plate (302) and is slidably connected thereto.

8. A stable clamping tensile testing machine according to claim 4, characterized in that: The fixed clamping plate (303) is fixedly connected to two positioning rods (4) on one side away from the movable clamping plate (6). The positioning rod (4) is located in the middle of the spring (304), and one end of the positioning rod passes through the fixed plate (302) and is slidably connected thereto.

9. The stable clamping tensile testing machine according to claim 5, characterized in that: The fixed clamping plate (303) is fixedly connected to two positioning rods (4) on one side away from the movable clamping plate (6). The positioning rod (4) is located in the middle of the spring (304), and one end of the positioning rod passes through the fixed plate (302) and is slidably connected thereto.

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