Test piece clamping tool for uniaxial compression test

Abstract

The utility model provides a test piece clamping tool for a uniaxial compression test, which belongs to the technical field of asphalt mixture test piece clamping and comprises a clamping and positioning mechanism, the clamping and positioning mechanism comprises a base, a placing table is arranged in the middle of the base, clamping assemblies are symmetrically arranged on two sides of the placing table, and the clamping assemblies are arranged on the base. The clamping assembly comprises a first air cylinder and two second air cylinders, a main clamping block is arranged at the output end of the first air cylinder, auxiliary clamping blocks are hinged to the two sides of the main clamping block, the output end of each second air cylinder is movably connected with the corresponding auxiliary clamping block, and the main clamping block and the auxiliary clamping blocks on the two sides of the containing table are matched to clamp the asphalt test piece. According to the utility model, in the uniaxial compression experiment process of the asphalt test piece, the clamping device can clamp a square or cylindrical asphalt test piece in a matched manner, a clamp with a corresponding structure does not need to be replaced, unnecessary steps are omitted, the operation is more convenient and quicker, and compared with the traditional clamp, the clamping device is time-saving and labor-saving, and the efficiency of detection work is improved.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of asphalt mixture specimen clamping, specifically a specimen clamping fixture for uniaxial compression testing. Background Technology

[0002] Asphalt mixture specimens are samples prepared in a laboratory to test and evaluate the physical and mechanical properties of asphalt concrete or asphalt macadam mixtures. These specimens are made according to specific standards and methods to ensure the accuracy and repeatability of test results. The preparation and testing of asphalt mixture specimens is a very important part of road engineering, as they help engineers evaluate and ensure the performance and durability of asphalt pavement structures.

[0003] In the testing of asphalt specimens, uniaxial compression tests are required. Uniaxial compression is a fundamental experimental method in materials mechanics testing, primarily used to determine the mechanical properties of materials under uniaxial (i.e., only one direction) compression. The purpose of uniaxial compression tests is to understand the mechanical behavior of asphalt mixtures during road use, especially under vehicle loads, providing a scientific basis for road design and construction. Depending on the experimental objective, testing standards, material properties, and equipment requirements, square or cylindrical asphalt specimens are selected for uniaxial compression tests. Square specimens may experience higher stress concentration at the edges during compression, which helps in studying the material's behavior under non-uniform stress states. Cylindrical specimens exhibit a more uniform stress distribution across their cross-section during compression, which helps obtain more accurate material performance data. However, switching between square and cylindrical specimens requires changing different clamps to adapt to the specimen structure and provide more stable clamping. Since clamps are mostly driven by cylinders or hydraulic cylinders, changing them is inconvenient, time-consuming, and labor-intensive, reducing the efficiency of the testing work. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model provides a specimen clamping fixture for uniaxial compression testing, which solves the technical problem mentioned in the background that currently, when switching between square and cylindrical specimens, different fixtures need to be changed to adapt, which is inconvenient and reduces the efficiency of testing.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A specimen clamping fixture for uniaxial compression testing includes a clamping and positioning mechanism. The clamping and positioning mechanism includes a base, and a placement platform for placing asphalt specimens is provided at the middle position of the base. Clamping components are symmetrically arranged on both sides of the placement platform. Each clamping component includes a first cylinder and two second cylinders, with the two second cylinders located on both sides of the first cylinder. A main clamping block is provided at the output end of the first cylinder. A secondary clamping block is hinged to both sides of the main clamping block, and the output end of each second cylinder is movably connected to the corresponding secondary clamping block. The asphalt specimen is clamped by the cooperation of the main clamping block and the secondary clamping blocks on both sides of the placement platform.

[0007] Furthermore, the main clamping block and the auxiliary clamping block are respectively provided with a first anti-slip pad and a second anti-slip pad on the side near the placement platform, and the anti-slip pad and the clamping block are detachably connected.

[0008] Furthermore, each of the main clamping blocks has a slider connected to its lower side by bolts, and each slider is slidably connected to a slide rail, which is located on the upper side of the base.

[0009] Furthermore, a Y-shaped connecting pipe is provided on the output ends of two adjacent second cylinders.

[0010] Furthermore, a second pad is provided on the lower side of each second cylinder, the second pad is located on the base, and the second pad and the base are detachably connected.

[0011] Furthermore, a first pad is provided on the lower side of each of the first cylinders. The first pad is located on the base and the first pad and the base are detachably connected.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model, through the design of a first cylinder, a second cylinder, a main clamping block, a secondary clamping block, a Y-shaped connecting pipe, a first anti-slip pad, a second anti-slip pad, a slider, and a slide rail, enables the clamping of square or cylindrical asphalt specimens during uniaxial compression experiments without the need to replace the corresponding clamps, eliminating unnecessary steps and making operation more convenient and faster. Compared with traditional clamps, it saves time and effort, improves the efficiency of testing, and has a stable structure that is easy to install, thus possessing certain market value and application prospects.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2This is an exploded view of the overall structure of this utility model;

[0017] Figure 3 This is an exploded view of the clamping component of this utility model;

[0018] Figure 4 This is a simplified diagram of the square specimen clamping mechanism of this utility model;

[0019] Figure 5 This is a simplified diagram of the clamping cylindrical specimen of this utility model.

[0020] In the diagram: 1. Clamping and positioning mechanism; 11. Base; 12. Placement platform; 13. First pad; 14. Second pad; 2. Clamping assembly; 21. First cylinder; 22. Second cylinder; 23. Main clamping block; 24. Secondary clamping block; 25. Y-shaped connecting pipe; 26. First anti-slip pad; 27. Second anti-slip pad; 28. Slider; 29. ​​Slide rail. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Please refer to the appendix carefully. Figure 1-5A specimen clamping fixture for uniaxial compression testing includes a clamping and positioning mechanism 1. The clamping and positioning mechanism 1 includes a base 11, and a placement platform 12 for placing asphalt specimens is provided at the middle position of the base 11. Clamping components 2 are symmetrically arranged on both sides of the placement platform 12. The clamping components 2 include a first cylinder 21 and two second cylinders 22. The two second cylinders 22 are located on both sides of the first cylinder 21. A main clamping block 23 is provided at the output end of the first cylinder 21. A secondary clamping block 24 is hinged to both sides of the main clamping block 23. The output end of each second cylinder 22 is movably connected to the corresponding secondary clamping block 24. The asphalt specimen is clamped by the cooperation of the main clamping block 23 and the secondary clamping block 24 on both sides of the placement platform 12.

[0025] The above structure enables the clamping of square or cylindrical asphalt specimens during uniaxial compression tests without the need to replace the clamps with corresponding structures, eliminating unnecessary steps and making the operation more convenient and faster. Compared with traditional clamps, it saves time and effort, improves the efficiency of testing, and has a stable structure that is easy to install, thus possessing certain market value and application prospects.

[0026] The specific operation is as follows: First, place the asphalt specimen to be tested on the placement platform 12. Then, the first cylinder 21 and the second cylinder 22 are activated, which pushes the main clamping block 23 and the auxiliary clamping block 24 closer to one side of the asphalt specimen, so that the first anti-slip pad 26 and the second anti-slip pad 27 contact the side of the asphalt specimen for clamping. If the asphalt specimen is square, the main clamping block 23 and the auxiliary clamping block 24 are as shown in the attached figure. Figure 4 The diagram shows how to clamp a square asphalt specimen. If the asphalt specimen is cylindrical, then the main clamping block 23 and the auxiliary clamping block 24 are as shown in the attached diagram. Figure 5 The cylindrical asphalt specimen is clamped as shown.

[0027] Please refer to the appendix carefully. Figure 1 and attached Figure 2 Each second cylinder 22 has a second pad 14 on its lower side. The second pad 14 is located on the base 11 and is detachably connected to the base 11. Each first cylinder 21 has a first pad 13 on its lower side. The first pad 13 is located on the base 11 and is detachably connected to the base 11. Through the second pad 14 and the first pad 13, the height of the second cylinder 22 and the first cylinder 21 is limited, so that the connection between the cylinder and the clamping block is at the same height.

[0028] Please refer to the appendix carefully. Figure 1 and attached Figure 3The main clamping block 23 and the auxiliary clamping block 24 are respectively provided with a first anti-slip pad 26 and a second anti-slip pad 27 on the side near the placement platform 12. The anti-slip pads and the clamping blocks are detachably connected. Through the cooperation of the first anti-slip pad 26 and the second anti-slip pad 27, the asphalt specimen is stably clamped. Each main clamping block 23 is bolted to a slider 28 on its lower side. Each slider 28 is slidably connected to a slide rail 29. The slide rail 29 is set on the upper side of the base 11. Through the cooperation between the slider 28 and the slide rail 29, the clamping block can move back and forth linearly stably. The output ends of two adjacent second cylinders 22 are provided with a Y-shaped connecting pipe 25. Through the Y-shaped connecting pipe 25, the two second cylinders 22 can be simultaneously inhaled so that the second cylinders 22 can operate synchronously.

[0029] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A specimen clamping fixture for uniaxial compression testing, comprising a clamping and positioning mechanism (1), wherein the clamping and positioning mechanism (1) comprises a base (11), wherein a placement platform (12) for placing asphalt specimens is provided at the middle position of the base (11), and clamping components (2) are symmetrically arranged on both sides of the placement platform (12), characterized in that, The clamping assembly (2) includes a first cylinder (21) and two second cylinders (22). The two second cylinders (22) are located on both sides of the first cylinder (21). The output end of the first cylinder (21) is provided with a main clamping block (23). Both sides of the main clamping block (23) are hinged with auxiliary clamping blocks (24). The output end of each second cylinder (22) is movably connected to the corresponding auxiliary clamping block (24). The main clamping block (23) and auxiliary clamping block (24) on both sides of the placement platform (12) clamp the asphalt specimen.

2. The specimen clamping fixture for uniaxial compression testing according to claim 1, characterized in that, The main clamping block (23) and the auxiliary clamping block (24) are respectively provided with a first anti-slip pad (26) and a second anti-slip pad (27) on the side near the placement platform (12), and the anti-slip pads and the clamping blocks are detachably connected.

3. The specimen clamping fixture for uniaxial compression testing according to claim 2, characterized in that, Each of the main clamping blocks (23) has a slider (28) bolted to its lower side, and each slider (28) is slidably connected to a slide rail (29), which is located on the upper side of the base (11).

4. The specimen clamping fixture for uniaxial compression testing according to claim 1, characterized in that, A Y-shaped connecting pipe (25) is provided on the output end of two adjacent second cylinders (22).

5. The specimen clamping fixture for uniaxial compression testing according to claim 4, characterized in that, Each of the second cylinders (22) has a second pad (14) on its lower side. The second pad (14) is located on the base (11) and the second pad (14) and the base (11) are detachably connected.

6. The specimen clamping fixture for uniaxial compression testing according to claim 1, characterized in that, Each of the first cylinders (21) has a first pad (13) on its lower side. The first pad (13) is located on the base (11) and the first pad (13) and the base (11) are detachably connected.

Images