A thermal conductivity material penetration testing device

Abstract

The utility model relates to needle penetration test technical field discloses a kind of heat-conducting material needle penetration testing device, including workbench, the workbench upper surface is fixedly connected with mesa, the mesa upper surface is fixedly connected with support column, the support column outer wall one side is provided with scraping assembly, the mesa top is provided with arc support, the arc support one end is provided with degree ruler, the arc support other end is fixedly connected with support, the support inner wall is provided with conical needle, the scraping assembly includes scraper, the scraper is arranged in support column outside one side, the scraper outer wall is fixedly connected with fixed plate, the fixed plate inner wall is provided with bolt one. In the utility model, by bolt two fixed on the different mounting holes on mounting seat, the angle of scraper is changed, the DC motor drive connecting plate is driven to rotate scraper by starting, sample scraping operation is realized, the flatness of test surface is guaranteed, and accuracy and consistency are improved.

Description

Technical Field

[0001] This utility model relates to the field of needle penetration testing technology, and in particular to a needle penetration testing device for thermally conductive materials. Background Technology

[0002] As electronic devices develop towards higher integration and higher power density, thermal grease, as a key thermal conductive material for filling the gaps between electronic components and heat dissipation parts and reducing contact thermal resistance, directly affects the heat dissipation efficiency and operational stability of the equipment. Penetration, as a core indicator for measuring the consistency, flowability and uniformity of thermal grease, is an important parameter for evaluating its performance. Therefore, thermal conductive material penetration testing devices for accurately measuring the penetration of thermal grease have become one of the important devices in the field of electronic material testing.

[0003] Existing needle penetration testing devices mostly rely on manually adjusting the position of the support and using gravity to lower the conical needle. Container clamping usually depends on simple slots or bolt tightening methods. The leveling operation requires manual use of a scraper or metal ruler at a fixed angle. During the test, the operator manually controls the timing of the conical needle release and reads the data through a dial or digital display unit.

[0004] However, in existing devices, manual leveling operations can easily introduce surface unevenness or local density differences, resulting in poor consistency of the test surface. Moreover, the scraper angle is usually determined manually, which is not stable enough and cannot adapt to the leveling requirements of materials with different viscosity. This affects the accuracy of the cone needle penetration resistance measurement, resulting in large fluctuations and insufficient repeatability of the test results. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a thermally conductive material penetration testing device, which aims to improve the problems of poor test surface consistency caused by the existing manual leveling operation which easily introduces surface unevenness or local density differences, and the fact that the scraper angle is usually judged manually, making it difficult to adapt to the leveling needs of materials with different viscosity, resulting in large fluctuations and insufficient repeatability of test results.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a thermally conductive material penetration testing device, comprising a worktable, a table surface fixedly connected to the upper surface of the worktable, a support column fixedly connected to the upper surface of the table surface, a leveling component provided on one side of the outer wall of the support column, an arc-shaped bracket provided above the table surface, a degree gauge provided at one end of the arc-shaped bracket, a support fixedly connected to the other end of the arc-shaped bracket, and a conical needle provided on the inner wall of the support. The leveling assembly includes a scraper, which is disposed on one side of the support column. A fixing plate is fixedly connected to the outer wall of the scraper. A bolt is disposed on the inner wall of the fixing plate. A mounting seat is disposed on the outer wall of the bolt. A plurality of mounting holes are evenly distributed in an arc-shaped trajectory with the bolt as the center on the outer wall of the mounting seat. A bolt is disposed on the inner wall of the mounting holes. One end of the bolt is disposed on the inner wall of the fixing plate. A connecting plate is fixedly connected to the inner wall of the mounting seat. A support plate is fixedly connected to one side of the outer wall of the support column. A DC geared motor is fixedly connected to the upper surface of the support plate. The output end of the DC geared motor is fixedly connected to the upper surface of the connecting plate.

[0007] Through the above technical solution, the workbench and table surface together provide a stable foundation for the entire testing device, ensuring the stability of the testing process. The support column integrates the leveling component and the measurement system into one unit. The measuring system consists of a ruler and a conical needle. After the conical needle falls freely, the depth of the needle insertion, combined with the reading of the ruler, enables the measurement of the penetration of the thermally conductive material. The leveling component drives the connecting plate to rotate the mounting base through a DC geared motor. With bolt one serving as the axis for adjusting the scraper angle, and bolt two matching the arc-shaped mounting hole on the mounting base, the scraper tilt angle can be flexibly adjusted to adapt to thermally conductive materials of different viscosities. Ultimately, this achieves a smooth leveling operation of the scraper on the surface of the thermally conductive material, ensuring a flat test surface, effectively reducing the penetration measurement error caused by uneven material surfaces, and improving test accuracy.

[0008] Preferably, the upper surface of the table is provided with a lighting lamp and an observation mirror, the lighting lamp is located on one side outside the support column, and the observation mirror is located on the other side outside the support column.

[0009] The above technical solution provides sufficient light to the test area through a lighting lamp, and the observation window changes the viewing angle, making it easier for operators to clearly observe the contact state between the tip of the cone and the surface of the heat-conducting material. This avoids contact judgment errors caused by insufficient light or poor viewing angle, ensuring that the cone makes precise contact with the material surface, and laying the foundation for the reliability of subsequent free fall tests.

[0010] Preferably, a slider is fixedly connected to the outer wall of the arc-shaped bracket, and an adjustment disc is provided on the outer wall of the slider.

[0011] The above technical solution uses a slider to fix the arc-shaped bracket, and an adjustment plate to lock and fine-tune the position of the slider. The height of the arc-shaped bracket and the conical needle can be flexibly adjusted according to the height of the thermally conductive material container and the testing requirements.

[0012] Preferably, a slide rod is slidably connected to the inner wall of the slider, and one end of the slide rod is fixedly connected to the upper surface of the support column.

[0013] The above technical solution uses a sliding rod to guide the slider, allowing the slider to slide up and down along the sliding rod, thereby adjusting the height of the conical needle.

[0014] Preferably, a placement platform is fixedly connected to the upper surface of the platform, and a threaded rod is rotatably connected to the inner wall of the placement platform, with a knob fixedly connected to one end of the threaded rod.

[0015] The above technical solution allows the screw rod to rotate via a knob. The two-way thread design of the screw rod enables the two sliding frames to move synchronously towards or away from each other, thus facilitating the adjustment of the clamping plate spacing and improving the efficiency of container fixation.

[0016] Preferably, the threaded rod is provided with two sliding frames symmetrically arranged on the left and right sides, and a clamp is fixedly connected to the upper surface of the sliding frame.

[0017] The above technical solution uses the rotation of the threaded rod to drive the two sliding frames to move synchronously. With the clamping plate fixed at the top of the sliding frame, a uniform clamping force can be applied from both sides of the container to achieve stable fixation of the container. This prevents the container from shifting due to leveling operations or impact of the conical needle during the test, ensures the consistency of the needle's entry point position each time, and reduces the positional error of the needle penetration measurement.

[0018] Preferably, the upper surface of the placement platform is provided with a sliding hole, and the outer wall of the sliding frame is slidably connected to the inner wall of the sliding hole.

[0019] The above technical solution provides sliding limit for the sliding frame through the sliding hole. With the sliding fit between the outer wall of the sliding frame and the inner wall of the sliding hole, the movement trajectory of the sliding frame is restricted, and the sliding frame is prevented from deflecting as the threaded rod rotates, thereby improving the stability and symmetry of container clamping.

[0020] Preferably, a guide rod is fixedly connected to the inner wall of the placement platform, and the inner wall of the sliding frame is slidably connected to the inner wall of the guide rod.

[0021] The above technical solution provides longitudinal support and guidance for the sliding frame through the guide rod. In conjunction with the sliding of the inner wall of the sliding frame along the guide rod, the stability of the sliding frame movement is further enhanced, preventing the sliding frame from tilting or jamming during the sliding process, and improving the accuracy and reliability of container fixation.

[0022] This utility model has the following beneficial effects: 1. In this utility model, the angles of the fixing plate and the scraper can be flexibly changed by fixing the two bolts to different mounting holes on the mounting base to adapt to the leveling requirements of materials with different viscosity. Then, the DC geared motor is started to drive the connecting plate to rotate the scraper, realizing the automatic leveling operation of the sample surface, effectively ensuring the flatness of the test surface, eliminating human operation errors, and improving the accuracy and consistency of the test results.

[0023] 2. In this utility model, by rotating the knob, the threaded rod drives the two sliding frames to move synchronously in opposite directions along the guide rod and the sliding hole, which drives the clamping plate to quickly center and clamp or loosen the container, thus realizing the reliable fixation of containers of different specifications, effectively avoiding the displacement of the container during the test, ensuring the accuracy of the needle insertion point, and thus ensuring the reliability of the test data. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a thermally conductive material penetration testing device proposed in this utility model; Figure 2 This is a schematic diagram of the connecting plate portion of the thermal conductive material penetration testing device proposed in this utility model; Figure 3 This is an enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the platform structure of a thermally conductive material penetration testing device proposed in this utility model. Figure 5 This is a schematic diagram of the clamping plate structure of a thermally conductive material penetration testing device proposed in this utility model.

[0025] Legend: 1. Workbench; 2. Support column; 3. Slide rod; 4. Slider; 5. Adjustment plate; 6. Arc bracket; 7. Dial ruler; 8. Support; 9. Cone needle; 10. Lighting lamp; 11. Observation mirror; 12. Placement platform; 13. Support plate; 14. DC geared motor; 15. Connecting plate; 16. Mounting base; 17. Mounting hole; 18. Bolt 1; 19. Bolt 2; 20. Fixing plate; 21. Scraper; 22. Table surface; 23. Threaded rod; 24. Guide rod; 25. Sliding frame; 26. Clamping plate; 27. Knob; 28. Sliding hole. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0027] Reference Figure 1 - Figure 5This utility model provides an embodiment of a thermally conductive material penetration testing device, including a workbench 1. The workbench 1 supports a platform 22 and other structures of the device, providing a stable foundation for the entire testing device. The platform 22 is fixedly connected to the upper surface of the workbench 1. A lighting lamp 10 and an observation mirror 11 are provided on the upper surface of the platform 22. The lighting lamp 10 provides illumination to the testing area, increasing the brightness of the testing area and facilitating clear observation of the contact state between the conical needle 9 and the material surface through the observation mirror 11. The observation mirror 11 assists in observing whether the head of the conical needle 9 is in perfect contact with the surface of the thermally conductive material. The lighting lamp 10 is located on one side outside the support column 2, and the observation mirror 11 is located on the other side outside the support column 2. A support column 2 is fixedly connected to the surface. A leveling component is provided on one side of the outer wall of the support column 2. An arc-shaped bracket 6 is provided above the table 22. One end of the arc-shaped bracket 6 is provided with a ruler 7 for reading the depth of the conical needle 9 embedded in the heat-conducting material. The other end of the arc-shaped bracket 6 is fixedly connected to a support 8. The inner wall of the support 8 is provided with a conical needle 9. The conical needle 9 is used to embed the heat-conducting material in free fall. The embedding depth of the conical needle 9 reflects the penetration degree of the heat-conducting material. A slider 4 is fixedly connected to the outer wall of the arc-shaped bracket 6. An adjustment disc 5 is provided on the outer wall of the slider 4 for locking or fine-tuning the position of the slider 4 on the slide rod 3. A slide rod 3 is slidably connected to the inner wall of the slider 4 to provide a guide track for the slider 4 to slide up and down. One end of the slide rod 3 is fixedly connected to the upper surface of the support column 2.

[0028] Specifically, the conical needle 9 works in conjunction with the arc-shaped support 6 and the measuring scale 7 to embed itself into the material through the free fall motion of the conical needle 9 and directly read the displacement depth through the measuring scale 7, thus achieving rapid and accurate acquisition of needle penetration data. The illumination lamp 10 provides uniform illumination for the test area, and with the high magnification function of the observation mirror 11, the operator can clearly judge the contact state between the conical needle 9 and the material surface, effectively avoiding the interference of visual errors on the judgment of the test starting point.

[0029] Reference Figure 2 and Figure 3The leveling assembly includes a scraper 21 for leveling the sample surface. The scraper 21 is located on one side outside the support column 2. A fixing plate 20 is fixedly connected to the outer wall of the scraper 21 for connecting and fixing the scraper 21. A bolt 18 is provided on the inner wall of the fixing plate 20. The bolt 18 passes through the fixing plate 20 and the mounting base 16 and is screwed with a nut to fix the fixing plate 20 and the mounting base 16 and serve as the rotation axis for adjusting the scraper angle. A mounting base 16 is provided on the outer wall of the bolt 18. The outer wall of the mounting base 16 is provided with multiple mounting holes 17 evenly distributed in an arc-shaped trajectory with the bolt 18 as the center. The mounting holes 17 are used to cooperate with bolt 29 to select and fix the angle of the scraper 21. The mounting hole 17 has a bolt 19 on its inner wall. One end of the bolt 19 is set on the inner wall of the fixing plate 20. The inner wall of the mounting base 16 is fixedly connected to the connecting plate 15. The outer wall of the support column 2 is fixedly connected to the support plate 13 for mounting the DC geared motor 14. The upper surface of the support plate 13 is fixedly connected to the DC geared motor 14. The DC geared motor 14 is a 60ZYT150 type DC geared motor 14, which is used to drive the connecting plate 15 to drive the mounting base 16 and the scraper 21 to rotate, so as to realize the scraping operation on the surface of the heat-conducting material. This is the existing technology and will not be described in detail here. The output end of the DC geared motor 14 is fixedly connected to the upper surface of the connecting plate 15.

[0030] Specifically, the DC geared motor 14 drives the connecting plate 15 to rotate, which in turn drives the mounting base 16 and the entire scraper assembly to perform uniform circular motion, realizing automatic leveling of the sample surface. This replaces the traditional manual leveling operation, eliminates errors caused by uneven human force and speed, and ensures the consistency of sample surface flatness. The operator can select different mounting holes 17 on the mounting base 16 according to the viscosity characteristics of the material to be tested, and screw in the bolts 19 to lock and fix it. This allows the scraping angle of the scraper 21 to be flexibly adapted to various thermally conductive materials from high fluidity to high viscosity, significantly improving the applicability and leveling effect of the device. It provides a highly flat and standardized sample surface for subsequent penetration testing, which is a key prerequisite for obtaining accurate and reliable penetration data and improves the repeatability and accuracy of the test results.

[0031] Reference Figure 4 and Figure 5A placement platform 12 is fixedly connected to the upper surface of the platform 22. A threaded rod 23 is rotatably connected to the inner wall of the placement platform 12. The threaded rod 23 has a bidirectional thread design. A knob 27 is fixedly connected to one end of the threaded rod 23 for manually rotating the threaded rod 23. Two sliding frames 25 are symmetrically arranged on the left and right sides of the threaded rod 23. A clamping plate 26 is fixedly connected to the upper surface of the sliding frame 25. The clamping plate 26 is used to directly contact the container containing the heat-conducting material. The container is clamped by the opposing movement of the two clamping plates 26 to prevent the container from shifting during the test and to ensure the accuracy of the pin entry point of the cone needle 9. A sliding hole 28 is opened on the upper surface of the placement platform 12 to provide guidance for the sliding of the sliding frame 25. The outer wall of the sliding frame 25 is slidably connected to the inner wall of the sliding hole 28. A support guide rod 24 is fixedly connected to the inner wall of the placement platform 12 to provide guidance for the sliding of the sliding frame 25. The inner wall of the sliding frame 25 is slidably connected to the inner wall of the guide rod 24.

[0032] Specifically, by rotating the knob 27 clockwise, the threaded rod 23 with its bidirectional thread design rotates. Since the threads on the left and right sides of the threaded rod 23 are opposite in direction, and the inner wall of the sliding frame 25 is threaded with the threaded rod 23, the two sliding frames 25 will move closer to each other synchronously, causing the clamping plate 26 to gradually clamp the container. During this process, the guide rod 24 provides longitudinal support and guidance for the sliding frame 25, preventing the sliding frame 25 from deflecting as the threaded rod 23 rotates. The sliding hole 28 further restricts the movement trajectory of the sliding frame 25, ensuring that the clamping plate 26 always moves in parallel. After the container is clamped and fixed, it is further realized that even if the subsequent leveling component works or the conical needle 9 falls freely to embed into the material, the container will not be displaced or shaken, effectively ensuring the consistency of the needle insertion point position of the conical needle 9 each time, and avoiding the measurement error of the needle penetration caused by the container offset.

[0033] Working principle: When performing a penetration test on a thermally conductive material, the container holding the material is first placed on the placement platform 12. Rotating the knob 27 rotates the threaded rod 23. Utilizing the bidirectional thread design of the threaded rod 23, the two sliding brackets 25 slide towards each other along the guide rod 24 and the sliding hole 28, causing the clamping plate 26 to clamp and fix the container. This allows for quick fixing or loosening of containers of different sizes by the clamping plate 26, preventing container displacement during the test and ensuring the accuracy of the penetration point. Subsequently, the scraper 21 is fixed using bolts 18 and 19. Bolt 19 can be fixed to different mounting holes 17 on the mounting base 16, allowing for flexible adjustment of the angles of the fixing plate 20 and the scraper 21 to accommodate the leveling of thermally conductive materials of different viscosities. After adjusting the requirements, start the DC geared motor 14 to drive the connecting plate 15 to rotate the mounting base 16 and scraper 21. Use the scraper 21 to smooth the surface of the heat-conducting material to ensure that the test surface is flat. Then, adjust the height of the slider 4 on the slide rod 3 by adjusting the adjustment plate 5 so that the cone needle 9 is at a suitable height above the heat-conducting material. At the same time, turn on the lighting lamp 10 to provide illumination. Carefully observe through the observation mirror 11 whether the head of the cone needle 9 is in just contact with the surface of the heat-conducting material. When it is confirmed that the head of the cone needle 9 is in just contact with the material surface, release the cone needle 9 to let it fall freely and embed into the heat-conducting material. Finally, by moving the scale 7 down onto the cone needle 9, the embedding depth of the cone needle 9 can be read to obtain the penetration data of the heat-conducting material, and finally obtain the softness and hardness index of the material.

Claims

1. A device for testing the penetration of thermally conductive materials, comprising a worktable (1), characterized in that: The workbench (1) has a table surface (22) fixedly connected to its upper surface. A support column (2) is fixedly connected to the upper surface of the table surface (22). A leveling component is provided on one side of the outer wall of the support column (2). An arc-shaped bracket (6) is provided above the table surface (22). A degree ruler (7) is provided at one end of the arc-shaped bracket (6). A support (8) is fixedly connected to the other end of the arc-shaped bracket (6). A conical needle (9) is provided on the inner wall of the support (8). The leveling assembly includes a scraper (21), which is disposed on one side of the support column (2). A fixing plate (20) is fixedly connected to the outer wall of the scraper (21). A bolt (18) is disposed on the inner wall of the fixing plate (20). A mounting seat (16) is disposed on the outer wall of the bolt (18). A plurality of mounting holes (17) are evenly distributed in an arc-shaped trajectory with the bolt (18) as the center on the outer wall of the mounting seat (16). A bolt (19) is disposed on the inner wall of the mounting hole (17). One end of the bolt (19) is disposed on the inner wall of the fixing plate (20). A connecting plate (15) is fixedly connected to the inner wall of the mounting seat (16). A support plate (13) is fixedly connected to one side of the outer wall of the support column (2). A DC geared motor (14) is fixedly connected to the upper surface of the support plate (13). The output end of the DC geared motor (14) is fixedly connected to the upper surface of the connecting plate (15).

2. The device for testing the penetration of thermally conductive materials according to claim 1, characterized in that: The upper surface of the table (22) is provided with a lighting lamp (10) and an observation mirror (11). The lighting lamp (10) is located on one side outside the support column (2), and the observation mirror (11) is located on the other side outside the support column (2).

3. The device for testing the penetration of thermally conductive materials according to claim 1, characterized in that: The outer wall of the arc-shaped bracket (6) is fixedly connected to a slider (4), and the outer wall of the slider (4) is provided with an adjustment plate (5).

4. The thermal conductivity material penetration testing device according to claim 3, characterized in that: The inner wall of the slider (4) is slidably connected to a slide rod (3), and one end of the slide rod (3) is fixedly connected to the upper surface of the support column (2).

5. The device for testing the penetration of thermally conductive materials according to claim 1, characterized in that: The upper surface of the table (22) is fixedly connected to a placement platform (12), and the inner wall of the placement platform (12) is rotatably connected to a threaded rod (23), and one end of the threaded rod (23) is fixedly connected to a knob (27).

6. The device for testing the penetration of thermally conductive materials according to claim 5, characterized in that: The threaded rod (23) is symmetrically provided with two sliding frames (25), and a clamping plate (26) is fixedly connected to the upper surface of the sliding frame (25).

7. The thermal conductivity material penetration testing device according to claim 6, characterized in that: The upper surface of the placement platform (12) is provided with a sliding hole (28), and the outer wall of the sliding frame (25) is slidably connected to the inner wall of the sliding hole (28).

8. The thermal conductivity material penetration testing device according to claim 7, characterized in that: The inner wall of the placement platform (12) is fixedly connected to a guide rod (24), and the inner wall of the sliding frame (25) is slidably connected to the inner wall of the guide rod (24).

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