Automatic positioning tool for testing compression strength of material
By designing a positioning mechanism consisting of a sliding component, a moving frame, and a guide rod for an automatic positioning fixture, the measurement error caused by shape differences in compressive strength testing of materials of different specifications was solved, achieving higher precision testing and safety protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUOQI LIGHTWEIGHT (JIANGSU) AUTOMOBILE TECH CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-08
AI Technical Summary
Existing fully automatic compressive strength testing machines cause material displacement due to shape differences when testing materials of different specifications and shapes, resulting in additional bending moments and measurement errors.
An automatic positioning fixture for material compressive strength testing was designed. The positioning mechanism consists of a sliding component, a moving frame, a guide rod, and a threaded rod. Through the cooperation of the guide groove and the threaded rod, automatic positioning of materials of different specifications is achieved, and protective components are provided to prevent fragments from flying.
It reduces measurement errors caused by compression displacement, improves the accuracy and safety of testing, and prevents injury from flying debris when the sample breaks.
Smart Images
Figure CN224216447U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of positioning fixtures for compressive strength testing, and in particular to an automatic positioning fixture for testing the compressive strength of materials. Background Technology
[0002] In the field of materials science and engineering, compressive strength testing is one of the core methods for evaluating the mechanical properties of materials, and it is widely used in industries such as building materials, aerospace, and machinery manufacturing. With the development of new materials technology, the types and specifications of test samples are becoming increasingly diversified, covering everything from standard-sized concrete cubes (such as 150mm×150mm×150mm) to irregularly shaped metal components (such as I-beams and cylindrical tubes), and even small-sized precision samples (such as microelectromechanical system components).
[0003] Existing fully automatic compression strength testing machines directly test the compression strength of materials by placing them on a worktable. When encountering test materials of different specifications and shapes, the materials will move to a certain extent during compression due to their shape. This material offset will cause the load direction to be inconsistent with the material's main axis, generating additional bending moments and leading to measurement errors. To address this issue, an automatic positioning fixture for material compression strength testing is proposed. Utility Model Content
[0004] To overcome the above deficiencies, this utility model provides an automatic positioning fixture for material compressive strength testing, which aims to improve the problem in the prior art that "the sample is offset during extrusion due to shape differences, and the load direction deviates from the main axis of the material, resulting in additional bending moment and measurement error".
[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic positioning fixture for testing the compressive strength of materials, wherein the sliding component is fixedly connected to the outside of the extrusion table, and a fixed plate is fixedly connected to one side of the two sets of moving frames opposite to each other. Two sets of guide rods are slidably connected to the inner wall of the fixed plate, and a positioning component is fixedly connected to the outside of the guide rod. A threaded rod is rotatably connected to the outside of the positioning component, and the threaded rod is threadedly connected to the inner wall of the fixed plate through the outside.
[0006] As a further description of the above technical solution:
[0007] The positioning element is designed to be arc-shaped.
[0008] As a further description of the above technical solution:
[0009] The upper part of the movable frame is vertical, the middle part of the movable frame bends away from the positioning component, and the lower part of the movable frame bends towards the positioning component.
[0010] As a further description of the above technical solution:
[0011] The two sets of guide rods are arranged on the front and rear sides of the threaded rod.
[0012] As a further description of the above technical solution:
[0013] A button is provided on the outside of the threaded rod.
[0014] As a further description of the above technical solution:
[0015] The positioning mechanism also includes a protective component, which includes a slot formed on the surface of the tester, a protective frame inserted into the inner wall of the slot, and two sets of movable doors slidably connected to the front side of the protective frame.
[0016] As a further description of the above technical solution:
[0017] Both sets of sliding doors are equipped with latches on the front side.
[0018] As a further description of the above technical solution:
[0019] An observation window is provided on the outside of the movable door.
[0020] This utility model has the following beneficial effects:
[0021] 1. In this utility model, the extrusion table is connected to the guide groove of the moving frame via a sliding member. When the extrusion table moves up and down, when the sliding member moves to the middle of the moving frame, the positioning member automatically positions the test material. When the sliding member moves to the lower part of the moving frame, the extrusion table extrudes the test material, and at the same time the positioning member moves away from the placement table, reducing the measurement error caused by extrusion displacement.
[0022] 2. In this utility model, the protective frame is fixed to the testing instrument through the plug-in slot to form a physical isolation barrier to prevent the sample from flying and injuring people when it breaks under pressure. The observation window on the outside of the movable door is made of impact-resistant glass, which allows the operator to observe the pressure state of the sample in real time without having to approach the danger area, thus improving safety. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;
[0024] Figure 2 This is a three-dimensional structural diagram of the testing instrument and positioning component in this utility model;
[0025] Figure 3 This is a three-dimensional structural diagram of the positioning component in this utility model.
[0026] Legend:
[0027] 1. Testing instrument; 2. Placement table; 3. Extrusion table; 4. Positioning assembly; 41. Slide rail; 42. Moving frame; 43. Guide groove; 44. Sliding component; 45. Fixing plate; 46. Guide rod; 47. Positioning component; 48. Threaded rod; 5. Protective assembly; 51. Insertion groove; 52. Protective frame; 53. Moving door. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Reference Figures 1-3 The present invention provides an embodiment of an automatic positioning fixture for testing the compressive strength of materials, comprising a testing instrument 1, a placement platform 2, and an extrusion platform 3. The testing instrument 1 serves as the basic frame of the fixture, integrating components such as the placement platform 2 and a positioning mechanism. It is equipped with compression testing equipment such as a press to transmit compressive load and collect test data. The placement platform 2 is used to place the material to be tested for compression. The placement platform 2 is located on the upper part of the testing instrument 1 and is used to place the test sample such as a concrete block or a metal rod. The surface is flat to ensure that the sample is subjected to uniform force. The extrusion platform 3 is located above the placement platform 2. The upper part of the testing instrument 1 is equipped with a positioning mechanism, which includes a positioning component 4.
[0030] Reference Figures 1-3 The positioning component 4 includes a slide rail 41 fixedly connected to the surface of the tester 1. The slide rail 41 provides a horizontal sliding track for two sets of moving frames 42, ensuring that the moving frames 42 move smoothly in the horizontal direction. Two sets of moving frames 42 are symmetrically slidably connected to the outside of the slide rail 41. A guide groove 43 is opened through the outside of the moving frame 42. The guide groove 43 bends synchronously with the moving frame 42. Under the guidance of the guide groove 43 and the moving frame 42, the moving frame 42 can drive the positioning component 47 to automatically position and center the material placed on the placement table 2. During the continuous descent of the extrusion table 3, the positioning component 47 will disengage from the placement table 2.
[0031] Reference Figures 1-3A sliding member 44 is slidably connected to the inner wall of the guide groove 43 for connecting the extrusion table 3 and the moving frame 42. The sliding member 44 is fixedly connected to the outside of the extrusion table 3. A fixed plate 45 is fixedly connected to one side of the two sets of moving frames 42 for installing guide rods 46 and threaded rods 48. Two sets of guide rods 46 are slidably connected to the inner wall of the fixed plate 45 to enable the positioning member 47 to move smoothly. A positioning member 47 is fixedly connected to the outside of the guide rods 46. The positioning member 47 is arc-shaped and used for automatic positioning of materials. A threaded rod 48 is rotatably connected to the outer side of the 7th component. The threaded rod 48 is threaded through and connected to the inner wall of the fixed plate 45. The threaded rod 48 can adjust the movement distance of the positioning component 47, thereby allowing for testing with materials of different specifications. A button is provided on the outer side of the threaded rod 48 for easy adjustment by the operator. Two sets of guide rods 46 are provided on the front and rear sides of the threaded rod 48. The upper part of the moving frame 42 is vertical, the middle part of the moving frame 42 bends away from the positioning component 47, and the lower part of the moving frame 42 bends towards the positioning component 47.
[0032] Reference Figure 1 and Figure 2 The positioning mechanism also includes a protective component 5, which includes a slot 51 on the surface of the tester 1 for installing a protective frame 52. The protective frame 52 is inserted into the inner wall of the slot 51. Two sets of movable doors 53 are slidably connected to the front of the protective frame 52. The protective frame 52 and the movable doors 53 form a closed protective space to prevent fragments from flying when the sample is crushed under pressure, thus protecting the safety of the operator. The front of the two sets of movable doors 53 is provided with buckles, and the outside of the movable doors 53 is provided with observation windows. The observation windows on the outside of the movable doors 53 are made of impact-resistant glass, allowing the operator to observe the pressure state of the sample in real time without having to approach the danger zone, thus improving safety.
[0033] Working principle: When in use, place the sample to be tested on the placement platform 2 of the testing instrument 1, ensuring that the bottom surface of the sample is completely in contact with the placement platform 2. According to the width or diameter of the sample, rotate the nut on the outside of the threaded rod 48, and drive the positioning part 47 to move horizontally along the guide rod 46 through the threaded transmission. The distance between the positioning part 47 and the sample can be precisely adjusted to accommodate samples of different specifications. Start the equipment to make the extrusion platform 3 move downward from the initial position. The sliding part 44 on the outside of the extrusion platform 3 descends synchronously along the guide groove 43 of the moving frame 42.
[0034] When the slider 44 moves to the middle bend of the guide groove 43, the movement of the slider 44 will cause the moving frame 42 to move inward along the slide rail 41 because the middle of the moving frame 42 bends away from the positioning member 47. This will cause the two sets of positioning members 47 to move closer to the sample simultaneously. The arc surface of the positioning member 47 fits against both sides of the sample. By utilizing the adaptive characteristics of the arc surface, the sample with different cross-sections such as cylindrical and rectangular is centered. The thread drive of the threaded rod 48 has self-locking properties. After positioning, no additional locking is required, thus avoiding displacement of the positioning member 47 due to vibration.
[0035] After positioning is completed, the extrusion table 3 continues to descend. At this time, the sliding member 44 enters the lower bending section of the guide groove 43. As the lower part of the moving frame 42 bends towards the positioning member 47, the descent of the sliding member 44 will drive the moving frame 42 to move outward along the slide rail 41, so that the positioning member 47 gradually moves away from the sample.
[0036] During the process of the bottom surface of the extrusion table 3 contacting the upper surface of the sample, the positioning component 47 gradually detaches from the sample and begins to apply a vertical compressive load. Due to the movement of the moving frame 42, the positioning component 4 no longer participates in the extrusion process, thus avoiding the interference between the positioning structure and the extrusion action in traditional fixtures, preventing the sample from being deformed or displaced due to the pressure of the positioning component 47, and reducing measurement errors caused by extrusion displacement.
[0037] Before testing, the protective frame 52 is installed onto the testing instrument 1 via the insertion slot 51, and the movable door 53 is locked with a buckle to form a closed protective space. Even if the sample breaks, the fragments will be blocked by the protective frame 52 to prevent them from flying and injuring people. The operator can observe through the impact-resistant observation window on the outside of the movable door 53.
[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automatic positioning fixture for testing the compressive strength of materials, comprising a testing instrument (1), a placement stage (2), and a compression stage (3), characterized in that: The placement platform (2) is located on the upper part of the tester (1), the extrusion platform (3) is located above the placement platform (2), and the upper part of the tester (1) is provided with a positioning mechanism, which includes a positioning component (4). The positioning component (4) includes a slide rail (41) fixedly connected to the surface of the tester (1). Two sets of movable frames (42) are symmetrically slidably connected to the outside of the slide rail (41). A guide groove (43) is opened through the outside of the movable frame (42). A sliding member (44) is slidably connected to the inner wall of the guide groove (43). The sliding member (44) is fixedly connected to the outside of the extrusion table (3). A fixed plate (45) is fixedly connected to the opposite side of the two sets of movable frames (42). Two sets of guide rods (46) are slidably connected to the inner wall of the fixed plate (45). A positioning member (47) is fixedly connected to the outside of the guide rod (46). A threaded rod (48) is rotatably connected to the outside of the positioning member (47). The threaded rod (48) is threadedly connected to the inner wall of the fixed plate (45).
2. The automatic positioning fixture for testing the compressive strength of materials according to claim 1, characterized in that: The positioning element (47) is set in an arc shape.
3. The automatic positioning fixture for testing the compressive strength of materials according to claim 1, characterized in that: The upper part of the movable frame (42) is vertical, the middle part of the movable frame (42) bends away from the positioning member (47), and the lower part of the movable frame (42) bends towards the positioning member (47).
4. The automatic positioning fixture for testing the compressive strength of materials according to claim 1, characterized in that: The two sets of guide rods (46) are arranged on the front and rear sides of the threaded rod (48).
5. The automatic positioning fixture for testing the compressive strength of materials according to claim 1, characterized in that: A button is provided on the outside of the threaded rod (48).
6. The automatic positioning fixture for testing the compressive strength of materials according to claim 1, characterized in that: The positioning mechanism also includes a protective component (5), which includes a slot (51) on the surface of the tester (1), a protective frame (52) inserted into the inner wall of the slot (51), and two sets of movable doors (53) slidably connected to the front side of the protective frame (52).
7. The automatic positioning fixture for testing the compressive strength of materials according to claim 6, characterized in that: The two sets of movable doors (53) are provided with buckles on the front side.
8. The automatic positioning fixture for testing the compressive strength of materials according to claim 6, characterized in that: An observation window is provided on the outside of the movable door (53).