A fixed platform for hardness testing
By using the clamping plate and extension plate structure of the hardness testing platform, the position of the metal workpiece is automatically adjusted, solving the problems of unstable clamping and manual adjustment in traditional equipment, thus improving testing efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI DAHUA DETECTION TECH
- Filing Date
- 2025-06-17
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional hardness testing equipment cannot stably clamp curved metal workpieces, requiring manual adjustment of the position, resulting in low testing efficiency and potential damage to the workpiece and endangering the safety of workers.
A hardness testing platform was designed, which adopts a clamping plate and extension plate structure. The clamping is controlled by a touch sensor and a micro motor, which automatically adjusts the position of the workpiece and fixes it in the testing center. Rubber pads are used to increase friction and the inclined surface design is used to collect debris.
It achieves automatic and stable clamping of metal workpieces, improves inspection efficiency, avoids workpiece damage and personnel injury, and ensures inspection accuracy and safety.
Smart Images
Figure CN224471397U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hardness testing technology, and in particular to a fixed platform for hardness testing. Background Technology
[0002] Hardness is the ability of a material to resist indentation by a harder object. Depending on the test method and the scope of application, hardness units can be divided into many types, such as Brinell hardness, Vickers hardness, Rockwell hardness, and micro Vickers hardness. Different units have different test methods and are suitable for materials or occasions with different properties.
[0003] Hardness testing is one of the important indicators for detecting material properties, and it is also one of the fastest and most economical testing methods. Therefore, hardness testing is usually carried out on metal materials after production to confirm whether the metals are qualified after production.
[0004] When performing Rockwell hardness testing on metallic materials, traditional left-right or front-back clamping methods cannot stably hold the materials because some of the materials have curved edges on their surfaces. Furthermore, since the indenter structure used for Rockwell hardness testing is fixed in position, manual adjustment of the material's position may be necessary to ensure its center is directly beneath the indenter structure. This process wastes testing time and results in low efficiency. Finally, during Rockwell hardness testing, some materials lacking sufficient strength are damaged when the indenter structure moves downwards, causing fragments to scatter and injure nearby workers. Utility Model Content
[0005] The purpose of this invention is to provide a fixed platform for hardness testing, which solves the problems of unstable clamping of the metal workpiece to be tested, the need for time-consuming manual adjustment of the position of the metal workpiece to be tested, and the potential for damage to nearby workers from sputtering of some defective metal workpieces during testing.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A fixed platform for hardness testing includes a platform body. A pressure head is detachably installed at the top of the inner cavity of the platform body, and a base is detachably installed at the bottom of the inner cavity of the platform body. A rubber pad is fixedly installed in the middle of the top of the base. Multiple strip grooves are formed on the top of the base. A threaded rod is rotatably installed in the middle of the inner cavity of the strip groove. A micro motor is detachably installed at the end of the threaded rod away from the rubber pad. A slider is rotatably installed on the outer surface of the threaded rod. A clamping plate is fixedly installed on the top of the slider. A touch sensor is fixedly installed at the bottom of the middle of the side of the clamping plate facing the rubber pad. Slide grooves are formed on both the left and right sides of the side of the clamping plate facing the rubber pad. Multiple extension plates are movably installed in the inner cavity of the slide grooves. A spring telescopic rod is fixedly installed in the middle of the inner cavity of the slide grooves.
[0007] Preferably, the rubber pad is located directly below the pressure head. The rubber pad is made of synthetic rubber material, so that when in use, the rubber pad increases the friction on the bottom surface of the workpiece to be tested, thereby reducing the possibility of the workpiece moving during testing.
[0008] Preferably, the strip grooves are evenly distributed on the top of the base, and the bottom of the inner cavity of the strip groove is designed with a slope. The bottom of the inner cavity of the strip groove is opened to penetrate the bottom of the base. In use, the slope design of the bottom of the inner cavity of the strip groove and the bottom of the strip groove penetrating the bottom surface of the base allow debris that may be generated during the workpiece inspection process to fall into the inner cavity of the strip groove and automatically roll off and move out of the inner cavity of the strip groove, thus avoiding affecting the normal operation of the inner cavity structure of the strip groove.
[0009] Preferably, the slider has a threaded hole in the middle, and the inner wall of the threaded hole has a thread that matches the shape of the outer surface of the threaded rod. The slider is rotatably mounted on the outer surface of the threaded rod through the threaded hole, so that when in use, the rotation of the threaded rod drives the slider and its top structure to move back and forth in the inner cavity of the strip groove.
[0010] Preferably, the bottom of the extension plate and the bottom of the clamping plate are on the same horizontal plane, and the left and right adjacent extension plates are slidably connected to each other. The outermost extension plate has a sloping design on the side away from the touch sensor. Thus, in use, multiple extendable extension plates can be used to fix workpieces of different diameters to be tested.
[0011] Preferably, the spring telescopic rod connects to one side of all the extension plates and clamping plates. In use, the spring telescopic rod allows all the extension plates to move outward from the inner cavity of the slide groove without external force. At the same time, when the extension plates on the adjacent clamping plates are in contact with each other, the close-fitting extension plates can compress and contract the spring telescopic rod, thereby reducing the length of the extension plates.
[0012] Preferably, the touch sensor is electrically connected to the micro motor on the same side, and all the touch sensors are electrically connected to the PLC controller located at the bottom of the base. Thus, when all the touch sensors are in contact with the workpiece to be tested, the PLC controller controls all the micro motors to shut down. At this time, all the clamping plates hold and adhere to the outer surface of the workpiece to be tested while pushing the workpiece to be tested directly under the pressure head.
[0013] Compared with the prior art, the advantages of this utility model are as follows:
[0014] 1. This utility model uses a combination of clamping plate structure and extension plate structure. During operation, multiple evenly distributed clamping plates and multiple extension plates are used. After the metal workpiece to be tested is placed on the top of the base, the clamping plates and extension plates move towards the metal workpiece synchronously until all the touch sensors contact the outer surface of the metal workpiece before controlling the micro motor to shut down. This effectively and stably clamps the metal workpiece to be tested, which is convenient for subsequent hardness testing of the metal workpiece.
[0015] 2. This utility model uses a combination of clamping plate structure and extension plate structure. During operation, the clamping plate and the extended plate push the metal workpiece to be tested towards the center of the base until all the touch sensors contact the outer surface of the metal workpiece before controlling the micro motor to shut down. At this time, the metal workpiece moves to the middle of the top of the base. There is no need to manually adjust the position of the metal workpiece, which improves the accuracy of metal workpiece hardness detection.
[0016] 3. This utility model utilizes the combined use of a clamping plate structure and an extension plate structure. During operation, the height of the clamping plate and the extension plate, as well as the fact that the bottom of all the extension plates are on the same horizontal plane as the bottom of the clamping plate, along with the matching of the inclined surfaces of the extension plates of adjacent clamping plates, ensure that the clamping plate and the extension plate form a circle during use. This prevents defective metal workpieces from being damaged and sputtered out during hardness testing, reducing the possibility of injury to nearby workers. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the top right front view of the base structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the front top view of the base structure of this utility model after it has been cut open;
[0020] Figure 4 This is a schematic diagram of the external appearance of the clamping plate structure of this utility model.
[0021] Reference numerals: 1. Platform; 2. Pressure head; 3. Base; 4. Rubber pad; 5. Strip groove; 6. Threaded rod; 7. Micro motor; 8. Slider; 9. Clamping plate; 10. Touch sensor; 11. Slide groove; 12. Extension plate; 13. Spring telescopic rod. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Please see Figures 1 to 4 This embodiment provides a fixed platform for hardness testing, including a platform body 1. A pressure head 2 is detachably installed on the top of the inner cavity of the platform body 1, and a base 3 is detachably installed on the bottom of the inner cavity of the platform body 1. A rubber pad 4 is fixedly installed in the middle of the top of the base 3. The rubber pad 4 is located directly below the pressure head 2. The rubber pad 4 is made of synthetic rubber material. In use, the rubber pad 4 increases the friction of the bottom surface of the workpiece to be tested, thereby reducing the possibility of the workpiece moving during testing.
[0024] Multiple strip grooves 5 are provided on the top of the base 3. The strip grooves 5 are evenly distributed on the top of the base 3. The bottom of the inner cavity of the strip groove 5 is designed with a slope. The bottom of the inner cavity of the strip groove 5 penetrates the bottom of the base 3. Therefore, during use, the slope design of the bottom of the inner cavity of the strip groove 5 and the bottom of the strip groove 5 penetrating the bottom surface of the base 3 will allow debris that may be generated during the workpiece inspection process to fall into the inner cavity of the strip groove 5 and automatically roll off and move out of the inner cavity of the strip groove 5, so as to avoid affecting the normal operation of the inner cavity structure of the strip groove 5.
[0025] A threaded rod 6 is rotatably mounted in the middle of the inner cavity of the strip groove 5. A micro motor 7 is detachably mounted at the end of the threaded rod 6 away from the rubber pad 4. A slider 8 is rotatably mounted on the outer surface of the threaded rod 6. A threaded hole is opened in the middle of the slider 8. The inner wall of the threaded hole is provided with a thread that matches the shape of the outer surface of the threaded rod 6. The slider 8 is rotatably mounted on the outer surface of the threaded rod 6 through the threaded hole. Thus, when in use, the rotation of the threaded rod 6 drives the slider 8 and its top structure to move back and forth in the inner cavity of the strip groove 5.
[0026] A clamping plate 9 is fixedly installed on the top of the slider 8. A touch sensor 10 is fixedly installed on the bottom of the middle part of the side of the clamping plate 9 facing the rubber pad 4. The touch sensor 10 is electrically connected to the micro motor 7 on the same side. All the touch sensors 10 are electrically connected to the PLC controller set at the bottom of the base 3. So when in use, when all the touch sensors 10 are in contact with the workpiece to be tested, the PLC controller controls all the micro motors 7 to turn off. At this time, all the clamping plates 9 clamp and adhere to the outer surface of the workpiece to be tested, while pushing the workpiece to be tested directly below the pressure head 2.
[0027] The clamping plate 9 has sliding grooves 11 on both the left and right sides facing the rubber pad 4. Multiple extension plates 12 are movably installed in the inner cavity of the sliding groove 11. The bottom of the extension plates 12 and the bottom of the clamping plate 9 are on the same horizontal plane. The left and right adjacent extension plates 12 are slidably connected to each other. The outermost extension plate 12 is designed with a slope on the side away from the touch sensor 10. Thus, when in use, multiple extendable extension plates 12 can be used to fix workpieces of different diameters to be tested.
[0028] A spring telescopic rod 13 is fixedly installed in the middle of the inner cavity of the slide groove 11. The spring telescopic rod 13 passes through all the extension plates 12 and connects to one side of the clamping plate 9. In use, the spring telescopic rod 13 allows all the extension plates 12 to move out of the inner cavity of the slide groove 11 and extend outward without external force. At the same time, when the extension plates 12 on the adjacent clamping plates 9 are close to each other, the close-fitting extension plates 12 can compress and retract the spring telescopic rod 13, thereby reducing the length of the extension plates 12.
[0029] Working principle: During operation, first assemble all the structures correctly, then place the metal workpiece to be tested on top of the rubber pad 4, and then start all the micro motors 7 at the same time, so that all the threaded rods 6 rotate, thereby driving all the sliders 8, clamps 9 and extension plates 12 to move towards the side of the metal workpiece to be tested. The metal workpiece is slowly moved to the center of the base 3 by using the moving clamps 9 and extension plates 12. During the movement, the matching inclined surfaces of the extension plates 12 on the adjacent clamps 9 are used to make all the clamps 9 and extension plates 12 form a circle to block the four sides of the metal workpiece to be tested.
[0030] As the clamping plates 9 and extension plates 12 continue to move until the touch sensors 10 on one side of all clamping plates 9 contact the outer surface of the metal workpiece to be tested, the PLC controller at the bottom of the base 3 controls all the micro motors 7 to shut down, and the positions of the clamping plates 9 and extension plates 12 no longer move. At this time, all the clamping plates 9 and extension plates 12 fix the different outer surfaces of the metal workpiece to be tested, thereby fixing the metal workpiece to be tested and moving it to the middle of the top of the base 3.
[0031] Then, the pressure head 2 moves down to test the hardness of the metal workpiece. During the test, if the metal workpiece is unqualified and is damaged under the pressure of the pressure head 2, resulting in debris splashing, the clamping plate 9 and extension plate 12 forming a circle are used to collect the debris and reduce the possibility of injury to nearby workers.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fixed platform for hardness testing, comprising a platform body (1), wherein a pressure head (2) is detachably installed on the top of the inner cavity of the platform body (1), a base (3) is detachably installed on the bottom of the inner cavity of the platform body (1), a rubber pad (4) is fixedly installed in the middle of the top of the base (3), a plurality of strip grooves (5) are provided on the top of the base (3), a threaded rod (6) is rotatably installed in the middle of the inner cavity of the strip grooves (5), a micro motor (7) is detachably installed at the end of the threaded rod (6) away from the rubber pad (4), a slider (8) is rotatably installed on the outer surface of the threaded rod (6), a clamping plate (9) is fixedly installed on the top of the slider (8), a touch sensor (10) is fixedly installed at the bottom of the middle of the side of the clamping plate (9) facing the rubber pad (4), and sliding grooves (11) are provided on both the left and right sides of the side of the clamping plate (9) facing the rubber pad (4), a plurality of extension plates (12) are movably installed in the inner cavity of the sliding groove (11), and a spring telescopic rod (13) is fixedly installed in the middle of the inner cavity of the sliding groove (11).
2. The fixed platform for hardness testing according to claim 1, characterized in that, The rubber pad (4) is located directly below the pressure head (2) and is made of synthetic rubber.
3. The fixed platform for hardness testing according to claim 1, wherein, The strip grooves (5) are evenly distributed on the top of the base (3). The bottom of the inner cavity of the strip grooves (5) is designed with a slope. The bottom of the inner cavity of the strip grooves (5) is opened to penetrate the bottom of the base (3).
4. The fixed platform for hardness testing according to claim 1, wherein, The slider (8) has a threaded hole in the middle, and the inner wall of the threaded hole has a thread that matches the shape of the outer surface of the threaded rod (6). The slider (8) is rotatably mounted on the outer surface of the threaded rod (6) through the threaded hole.
5. The fixed platform for hardness testing of claim 1, wherein, The bottom of the extension plate (12) and the bottom of the clamping plate (9) are on the same horizontal plane. The left and right adjacent extension plates (12) are slidably connected to each other. The outermost extension plate (12) is designed with a slope on the side away from the touch sensor (10).
6. The fixed platform for hardness testing according to claim 1, wherein, The spring telescopic rod (13) passes through all the extension plates (12) and connects to one side of the clamping plate (9).
7. The fixed platform for hardness testing according to claim 1, wherein, The touch sensor (10) is electrically connected to the micro motor (7) on the same side, and all the touch sensors (10) are electrically connected to the PLC controller located at the bottom of the base (3).