Multi-angle measurement thermal interface material aging test tooling

Abstract

The utility model discloses a kind of multi-angle measurement thermal interface material aging test tool, belong to electronic product thermal management technical field, the multi-angle measurement thermal interface material aging test tool of this includes: rack, multi-angle adjusting mechanism, first test module, second test module, pressure regulating mechanism and sensing and acquisition mechanism, first test module and second test module are oppositely arranged, test gap for placing thermal interface material is formed between the two, multi-angle adjusting mechanism drives first test module and second test module synchronous rotation;Pressure regulating mechanism is used to drive first test module and second test module to be close to each other or away from each other;Sensing and acquisition mechanism is used to detect the temperature of first test module and second test module.The utility model can realize the thermal resistance and pump out performance synchronous test of thermal interface material in different space orientation and wide heat flow density range, provide reliable experimental platform for the multi-posture service evaluation of thermal interface material.

Description

Technical Field

[0001] This utility model relates to the field of thermal management technology for electronic products, and in particular to a multi-angle measuring tool for aging tests of thermal interface materials. Background Technology

[0002] As a key component in the thermal management of electronic devices, the long-term reliability of thermal interface materials directly affects the junction temperature control of chips and the lifespan of the entire device. With the continuous increase in power density, higher requirements are placed on the performance evaluation of materials under complex service conditions.

[0003] Currently, the thermal resistance testing fixtures for thermal interface materials generally adopt a horizontally placed flat plate stacking structure. The heating module, thermal interface material sample, and cold plate are pressed vertically along the direction of gravity. The testing process is always completed under the same horizontal orientation, which cannot simulate real service conditions with multiple orientations. As a result, key experimental data on the changes in thermal resistance of materials and pumping behavior under different spatial orientations are missing, making it difficult to accurately characterize the actual heat dissipation performance and service reliability of thermal interface materials under complex conditions. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a multi-angle measurement fixture for the aging of thermal interface materials, which can simultaneously test the thermal resistance and pumping performance of thermal interface materials under different spatial orientations and over a wide range of heat flux densities, providing a reliable experimental platform for multi-position service evaluation of thermal interface materials.

[0005] The multi-angle measurement fixture for aging of thermal interface materials according to an embodiment of the present invention includes: a frame; a multi-angle adjustment mechanism disposed on the frame; a first test module and a second test module disposed on the multi-angle adjustment mechanism and arranged opposite to each other, wherein a test gap for placing thermal interface material is formed between the first test module and the second test module, and the multi-angle adjustment mechanism drives the first test module and the second test module to rotate synchronously to adjust the tilt angle of the test gap; a pressure adjustment mechanism disposed on the frame and connected to the first test module, the pressure adjustment mechanism being used to drive the first test module and the second test module to move closer or further apart to adjust the contact pressure applied to the thermal interface material; and a sensing and acquisition mechanism disposed on the frame, the sensing and acquisition mechanism being used to detect the temperature of the first test module and the second test module.

[0006] The invention offers at least the following advantages: In use, the thermal interface material to be tested is first placed in the test gap between the first and second test modules. Then, the first and second test modules are synchronously rotated to the target test angle and locked using a multi-angle adjustment mechanism. Next, the first and second test modules are driven to approach each other using a pressure adjustment mechanism, pressing the thermal interface material into the test gap and subjecting it to a set contact pressure. Subsequently, the first and second test modules are activated for testing. The sensing and acquisition mechanism collects temperature data in real time to evaluate the thermal resistance performance of the thermal interface material in its current orientation. By repeating the above steps at different test angles, thermal resistance data of the thermal interface material in multiple spatial orientations can be obtained. Therefore, this invention, through the synchronous rotation of the first and second test modules via a multi-angle adjustment mechanism, enables thermal resistance testing of thermal interface materials in various spatial orientations within the range of 0° to 90°. This provides a direct experimental means to evaluate the service performance of thermal interface materials under different installation orientations in actual electronic devices, overcoming the inherent limitation of traditional tooling that can only perform tests in a single horizontal orientation. Meanwhile, the pressure regulating mechanism can maintain a stable contact pressure during angle switching, ensuring the comparability of test results at different angles; combined with the real-time temperature monitoring by the sensing and acquisition mechanism, this fixture can simulate the multi-physics coupling conditions in the actual service process of thermal interface materials, providing a reliable experimental means for the performance evaluation and selection of high thermal conductivity thermal interface materials.

[0007] According to some embodiments of the present invention, the multi-angle adjustment mechanism includes: a rotating seat, rotatably mounted on the frame, with both the first test module and the second test module mounted on the rotating seat; and an angle locking component, mounted on the frame and connected to the rotating seat, which is used to lock the rotating seat at a preset test angle.

[0008] According to some embodiments of the present invention, the angle locking component includes: a rotating disk, which is rotatably mounted on the frame and fixedly connected to a rotating seat, and the rotating disk has a plurality of angle positioning holes along its circumference; and a positioning pin, which is movably mounted on the frame, and the positioning pin is adapted to the angle positioning holes, and when the positioning pin cooperates with the angle positioning holes, it locks the rotating disk at a preset test angle.

[0009] According to some embodiments of this utility model, the first test module is a cold plate, the second test module is a heating module, the heating module is used to provide controllable heating heat flow, and the cold plate is used to cool the end of the thermal interface material away from the heating module.

[0010] According to some embodiments of the present invention, the heating module includes a heat-equalizing carrier fixedly disposed on a rotating base, and a resistance heating element is disposed inside the heat-equalizing carrier.

[0011] According to some embodiments of the present invention, the cold plate includes: a first panel disposed on the upper end of the heat exchange carrier, a boss being provided at the end of the first panel near the heat exchange carrier, and microchannels being integrated inside the first panel; a second panel disposed on the end of the first panel away from the heat exchange carrier, a rectifier channel being integrated inside the second panel, and a first sealing gasket being provided between the second panel and the first panel; and a third panel disposed on the end of the second panel away from the first panel, and a second sealing gasket being provided between the third panel and the second panel.

[0012] According to some embodiments of the present invention, the pressure regulating mechanism includes: a driving member disposed on a rotating seat; and a pressure head disposed at the output end of the driving member, the pressure head abutting against the end of the cold plate away from the heating module, the driving member being used to drive the pressure head to move the cold plate closer to or away from the heating module.

[0013] According to some embodiments of the present invention, a limiting groove is provided at one end of the third panel away from the second panel. The size of the limiting groove is adapted to the size of the pressure head, and the limiting groove is used to limit the pressure head.

[0014] According to some embodiments of the present invention, the sensing and acquisition mechanism includes: a first temperature sensor arranged inside the boss, which is used to detect the temperature of the cold plate; a second temperature sensor arranged at one end of the heat spreader near the test gap, which is used to detect the temperature of the heating module; and a pressure sensor arranged on the pressure head, which is used to detect the contact pressure.

[0015] According to some embodiments of the present invention, a collection mechanism is also included. The collection mechanism is disposed at one end of the second test module away from the first test module and rotates together with the second test module. The collection mechanism is used to collect the thermal interface material that is squeezed out from the test gap during the test.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the multi-angle measurement test fixture for thermal interface materials aging in this specific embodiment; Figure 2 for Figure 1 A cross-sectional schematic diagram; Figure 3 for Figure 1 Schematic diagram of the structure of the intermediate cooling plate; Figure 4 for Figure 1 Schematic diagram of the bottom structure of the intermediate cooling plate; Figure 5 for Figure 1 A schematic diagram of the heating module.

[0018] Figure label: Rack 1; Multi-angle adjustment mechanism 2, rotating seat 21, angle locking component 22, rotating disk 221, angle positioning hole 222, positioning pin 223; First test module 3, first panel 31, boss 311, microchannel 312, second panel 32, first sealing gasket 321, rectifier channel 322, third panel 33, second sealing gasket 331, limiting groove 34; Second test module 4, heat spreader 41; Pressure regulating mechanism 5, drive component 51, pressure head 52; Collection agency 6. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "upstream," "downstream," etc., are used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, the terms "setting", "installation", "connection", etc. should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in combination with the specific content of the technical solution.

[0022] Reference Figures 1 to 5This utility model discloses a multi-angle measurement fixture for aging of thermal interface materials, including a frame 1, a multi-angle adjustment mechanism 2, a first test module 3, a second test module 4, a pressure adjustment mechanism 5, and a sensing and acquisition mechanism. The multi-angle adjustment mechanism 2 is mounted on the frame 1. The first test module 3 and the second test module 4 are mounted on the multi-angle adjustment mechanism 2 and arranged opposite to each other, forming a test gap between them for placing the thermal interface material. The multi-angle adjustment mechanism 2 drives the first test module 3 and the second test module 4 to rotate synchronously to adjust the tilt angle of the test gap. The pressure adjustment mechanism 5 is mounted on the frame 1 and connected to the first test module 3. The pressure adjustment mechanism 5 drives the first test module 3 and the second test module 4 to move closer or further apart to adjust the contact pressure applied to the thermal interface material. The sensing and acquisition mechanism is mounted on the frame 1 and is used to detect the temperature of the first test module 3 and the second test module 4.

[0023] like Figures 1 to 5 As shown, frame 1 serves as the supporting foundation for the entire fixture, providing installation and positioning references for each functional module, and bearing the mechanical loads generated during testing. Specifically, frame 1 consists of a bottom base, two side columns, and a crossbeam connecting the two side columns, forming a closed rectangular force frame to ensure sufficient rigidity and stability when normal pressure is applied. A multi-angle adjustment mechanism 2 is mounted on frame 1 to drive the components mounted on it to rotate around a horizontal axis, simulating various installation postures (horizontal, tilted, vertical, etc.) that thermal interface materials may face in actual electronic devices. The first test module 3 and the second test module 4 are positioned opposite each other on the multi-angle adjustment mechanism 2, forming a test gap between them for placing the thermal interface material to be tested. The multi-angle adjustment mechanism 2 can drive the first test module 3 and the second test module 4 to rotate synchronously as a whole. During rotation, the relative position between the first test module 3 and the second test module 4 remains unchanged, ensuring that the size and shape of the test gap do not change with angle changes, thereby adjusting the tilt angle of the test gap relative to the horizontal plane. A pressure regulating mechanism 5 is mounted on the frame 1 and connected to the first test module 3. It drives the first test module 3 to move relative to the second test module 4, causing them to move closer or further apart, thereby adjusting the contact pressure applied to the thermal interface material in the test gap. A sensing and data acquisition mechanism is mounted on the frame 1 and acquires temperature data on both sides of the thermal interface material by real-time detection of the temperatures of the first test module 3 and the second test module 4.

[0024] During testing, the thermal interface material to be tested is placed in the test gap between the first test module 3 and the second test module 4. The multi-angle adjustment mechanism 2 drives the first test module 3 and the second test module 4 to rotate synchronously to the preset target test angle and lock them. The pressure adjustment mechanism 5 drives the first test module 3 closer to the second test module 4 to press the thermal interface material in the test gap, achieving a preset standard contact pressure. Then, the first test module 3 and the second test module 4 are activated for testing. Throughout the entire testing process, the sensing and acquisition mechanism collects temperature data in real time. By changing different test angles, the above clamping, angle adjustment, pressurization, testing, and data acquisition process is repeated to obtain complete thermal resistance performance data of the thermal interface material under various spatial orientations.

[0025] Therefore, this utility model uses a multi-angle adjustment mechanism 2 to drive the first test module 3 and the second test module 4 to rotate synchronously, realizing the thermal resistance test of thermal interface materials under multiple spatial postures. At the same time, during the angle switching process, the pressure adjustment mechanism 5 can maintain a stable contact pressure to ensure the comparability of test results at each angle. With the real-time temperature monitoring of the sensing and acquisition mechanism, this fixture can realistically simulate the multi-physics coupling conditions of thermal interface materials in actual service, thus providing a reliable experimental platform for the performance evaluation and selection of high thermal conductivity thermal interface materials.

[0026] In some specific embodiments of this utility model, the multi-angle adjustment mechanism 2 includes: a rotating seat 21, which is rotatably mounted on the frame 1, and the first test module 3 and the second test module 4 are both mounted on the rotating seat 21; and an angle locking component 22, which is mounted on the frame 1 and connected to the rotating seat 21. The angle locking component 22 is used to lock the rotating seat 21 at a preset test angle.

[0027] like Figure 1As shown, the rotating base 21 is rotatably mounted between the two side columns of the frame 1 via a rotating shaft. The rotating shaft passes through the center of the rotating base 21 and is fixedly connected to it. Both ends of the rotating shaft are rotatably engaged with the two side columns of the frame 1 via bearings, allowing the rotating base 21 to rotate freely around the axis of the rotating shaft on the frame 1. The first test module 3 and the second test module 4 are both fixedly mounted on the rotating base 21 and rotate together with it. The angle locking assembly 22 is disposed on the frame 1 and connected to the rotating base 21. It locks the rotating base 21 at the target test angle after it rotates to that angle, preventing unexpected rotation of the rotating base 21 due to gravity or external force disturbances during the test, thereby ensuring the accuracy and stability of the test angle. In this embodiment, the operator first adjusts the first test module 3 and the second test module 4, along with the test gap, to the target test angle by rotating the rotating base 21. Then, the angle locking component 22 fixes the rotating base 21 relative to the frame 1, so that the entire test system is kept at this angle for subsequent thermal resistance testing.

[0028] In some specific embodiments of this utility model, the angle locking component 22 includes: a rotating disk 221, which is rotatably mounted on the frame 1 and fixedly connected to the rotating seat 21, and the rotating disk 221 has a plurality of angle positioning holes 222 along its circumference; and a positioning pin 223, which is movably mounted on the frame 1, and the positioning pin 223 is adapted to the angle positioning holes 222. When the positioning pin 223 cooperates with the angle positioning holes 222, it locks the rotating disk 221 at a preset test angle.

[0029] like Figure 1 As shown, a rotating disk 221 is mounted on a frame 1. One end of the rotating shaft is fixedly connected to a rotating base 21, and the other end of the rotating shaft passes through the side wall of the frame 1 and extends to the outside of the frame 1, where it is fixedly connected to the center of the rotating disk 221. A bearing is provided between the rotating shaft and the side wall of the frame 1, so that the rotating disk 221 and the rotating base 21 are coaxially fixed and can rotate synchronously. The rotating disk 221 has multiple angle positioning holes 222 along its circumference. These angle positioning holes 222 are evenly distributed on the circumference of the rotating disk 221 at predetermined angular intervals, and each angle positioning hole 222 corresponds to a preset test angle. A positioning pin 223 is telescopically mounted on the frame 1, and the positioning pin 223 is adapted to the angle positioning holes 222. When the rotating disk 221 rotates to the target test angle, the operator inserts the positioning pin 223 into the angle positioning hole 222 corresponding to the angle. At this time, the positioning pin 223 engages with the frame 1 and the rotating disk 221, preventing the rotating disk 221 from continuing to rotate relative to the frame 1, thereby locking the rotating seat 21 together with the first test module 3 and the second test module 4 installed on it at the preset test angle.

[0030] Specifically, the rotating disk 221 has multiple angle positioning holes 222 along its circumference. The angle positioning holes 222 are evenly distributed circumferentially at intervals of 15° or 30°. By cooperating with the positioning pins 223 and the different angle positioning holes 222, the rotating base 21 can be locked at a preset test angle of 0°, 15°, 30°, 45°, 60°, 75°, or 90°. Those skilled in the art can adjust the interval and distribution of the angle positioning holes 222 according to actual test requirements to achieve finer angular resolution.

[0031] In some specific embodiments of this utility model, the first test module 3 is a cold plate, the second test module 4 is a heating module, the heating module is used to provide controllable heating heat flow, and the cold plate is used to cool the end of the thermal interface material away from the heating module.

[0032] like Figures 3 to 5 As shown, the side of the heating module facing the test gap is the heating end face. When the thermal interface material is placed in the test gap, one surface of the thermal interface material contacts the heating end face of the heating module. The heat generated by the heating module is transferred to the thermal interface material through the heating end face, simulating the heat input of the chip's heat-generating end. The cold plate is arranged opposite to the heating module, positioned above it. Its side facing the test gap is the cooling end face. When the thermal interface material is placed in the test gap, the other surface of the thermal interface material contacts the cooling end face of the cold plate. It should be noted that the cold plate has coolant channels inside. An external cooling system supplies circulating coolant to the cold plate. As the coolant flows through the interior of the cold plate, it carries away the heat conducted to the cold plate through the thermal interface material, simulating the heat dissipation conditions of a heat sink.

[0033] In this embodiment, the thermal interface material to be tested is sandwiched in the test gap between the cold plate and the heating module. During testing, the heating module outputs a set power to heat the heat flow. The heat flow passes through the thermal interface material along the thickness direction and is conducted to the cold plate, where the heat is dissipated by the circulating coolant inside the cold plate. The heat transfer path in this test scenario is completely consistent with the heat transfer path of the chip, thermal interface material, and heat sink in actual electronic devices, ensuring that the measured thermal resistance value can accurately reflect the thermal conductivity of the thermal interface material under actual service conditions.

[0034] In some specific embodiments of this utility model, the heating module includes a heat spreader 41 fixedly disposed on the rotating base 21, and a resistance heating element is disposed inside the heat spreader 41.

[0035] like Figure 1 and Figure 5As shown, the heat spreader 41 is fixed on the rotating base 21 and is made of a high thermal conductivity material. The upper surface of the heat spreader 41 is the heating surface, which can directly contact the thermal interface material arranged in the test gap. The resistance heating elements are evenly distributed inside the heat spreader 41. During operation, the heat generated by the resistance heating elements diffuses and transfers to the entire heat spreader 41, making the heating surface a surface heat source with a uniform and stable temperature, thereby providing uniform heating conditions for the thermal interface material to be tested.

[0036] In some specific embodiments of this utility model, the rated power density of the resistance heating element is set to be no less than 400 W / cm², so that the heat flux density of the heating module can be continuously adjusted within the range of 10 W / cm² to 400 W / cm², adapting to the testing requirements of different working conditions and different specifications of thermal interface materials.

[0037] Optionally, the heating module can work in conjunction with the programmable power supply module of the control system to achieve continuous stepless adjustment of heat flux density in the range of 10W / cm² to 400W / cm², with an adjustment resolution better than 1W / cm².

[0038] Furthermore, a heating base is provided at the bottom of the heating module. The heating base is made of a low thermal conductivity material, which can effectively block the heat generated by the heat carrier during operation from being conducted to the bottom frame, so that the heat is directionally concentrated and transferred to the test contact surface of the thermal interface material, thus avoiding the frame from being deformed by heat.

[0039] In some specific embodiments of this utility model, the heating base is made of PEEK material.

[0040] In some specific embodiments of this utility model, the cold plate includes: a first panel 31, a second panel 32, and a third panel 33. The first panel 31 is disposed on the upper end of the heat spreader 41, and a boss 311 is provided at the end of the first panel 31 near the heat spreader 41. A microchannel 312 is integrated inside the first panel 31. The second panel 32 is disposed at the end of the first panel 31 away from the heat spreader 41. A straightening channel 322 is integrated inside the second panel 32. A first sealing gasket 321 is provided between the second panel 32 and the first panel 31. The third panel 33 is disposed at the end of the second panel 32 away from the first panel 31. A second sealing gasket 331 is provided between the third panel 33 and the second panel 32.

[0041] like Figure 3 and Figure 4As shown, the cold plate adopts a three-layer stacked structure, consisting of a third panel 33, a second panel 32, and a first panel 31, arranged sequentially from the side away from the heating module to the side facing the heating module. Specifically, the first panel 31, second panel 32, and third panel 33 are stacked from top to bottom and fastened together as a single unit by several bolts. The first panel 31 is located at the upper end of the heat spreader 41, with its end facing the heat spreader 41 serving as a cooling end face. This cooling end face has a boss 311, which protrudes downwards from the lower surface of the first panel 31. The bottom surface of the boss 311 forms the actual contact interface that directly contacts the heat interface material. The first panel 31 integrates microchannels 312, which are arranged in a serpentine or spiral pattern and distributed around or directly above the boss 311 within the plate body. These microchannels efficiently dissipate heat transmitted through the boss 311. The second panel 32 is stacked on top of the first panel 31. It integrates a rectifier channel 322 for receiving coolant from an external cooling system and channeling the coolant into a uniform flow before delivering it to the microchannels 312 of the first panel 31. The third panel 33 is stacked on top of the second panel 32. Its upper surface serves as the bearing surface for the cold plate, cooperating with the pressure regulating mechanism 5 to receive clamping force and transmit this force to the first panel 31 and the boss 311 below, ultimately applying it to the thermal interface material.

[0042] Specifically, the cooling system also includes a thermostatic circulating bath, fluid pipelines, flow regulating valves, and a circulating pump. The thermostatic circulating bath is connected to the coolant channel of the cold plate through the fluid pipelines, providing the cold plate with circulating coolant with a temperature range of 5°C to 95°C. The entire cooling system is controlled in a closed loop based on temperature feedback signals from sensors and acquisition mechanisms, and regulates the coolant flow rate and temperature through the flow regulating valves and the circulating pump to maintain the target temperature on the surface of the cold plate.

[0043] Furthermore, a first sealing gasket 321 is provided between the second panel 32 and the first panel 31. The first sealing gasket 321 is located between the rectifier channel 322 and the microchannel 312 to prevent coolant leakage at the joint surface between the second panel 32 and the first panel 31. A second sealing gasket 331 is provided between the third panel 33 and the second panel 32 to prevent coolant leakage at the joint surface between the third panel 33 and the second panel 32.

[0044] Thus, the coolant is transported from the external cooling system to the rectifier channel 322 of the second panel 32 through the pipeline. After being rectified by the rectifier channel 322, it enters the microchannel 312 of the first panel 31. In the microchannel 312, it flows through the area directly above the boss 311, efficiently carrying away the heat conducted to the inside of the cold plate through the thermal interface material and the boss 311. The coolant that has absorbed heat returns to the external cooling system from the outlet of the microchannel 312 through the pipeline for recycling, ensuring the sealing of the coolant flow channel and improving the heat dissipation efficiency and cooling uniformity of the cold plate.

[0045] In some specific embodiments of this utility model, the pressure regulating mechanism 5 includes: a driving member 51, which is disposed on the rotating seat 21; and a pressure head 52, which is disposed at the output end of the driving member 51. The pressure head 52 abuts against the end of the cold plate away from the heating module. The driving member 51 is used to drive the pressure head 52 to move the cold plate closer to or away from the heating module.

[0046] like Figure 1 and Figure 2 As shown, the driving component 51 is fixedly mounted on the rotating base 21 and rotates together with the rotating base 21. Specifically, the driving component 51 is a power element capable of providing controllable linear displacement. It has a fixed end and a movable output end. The fixed end is fixed relative to the rotating base 21, and the movable output end can reciprocate in the direction of approaching or moving away from the heating module. The pressure head 52 is a rigid force transmission component. Its upper end is fixedly connected to the output end of the driving component 51, and its lower end abuts against the surface of the cold plate on the side away from the heating module. When the driving component 51 drives the output end to move, the pressure head 52 moves together with the output end, causing the cold plate to move in the direction of approaching or moving away from the heating module.

[0047] It should be noted that when the driving component 51 drives the pressure head 52 to move closer to the heating module, the pressure head 52 pushes the cold plate closer to the heating module, reducing the test gap and increasing the contact pressure on the hot interface material clamped in the test gap; when the driving component 51 drives the pressure head 52 to move away from the heating module, the pressure head 52 drives the cold plate away from the heating module, increasing the test gap and reducing the contact pressure on the hot interface material. The pressure regulating mechanism 5 transmits the driving force of the driving component 51 to the cold plate through the pressure head 52, thereby achieving precise control of the contact pressure.

[0048] In some specific embodiments of this utility model, the driving component 51 is a combination structure of a handwheel and a lead screw. The handwheel is mounted on the rotating base 21, serving as a manual operation interface for the operator to hold and apply rotational torque. One end of the lead screw is fixedly connected to the handwheel, and the other end passes through the rotating base 21 and connects to the pressure head 52. When the operator rotates the handwheel, the handwheel drives the lead screw to rotate synchronously. During rotation, the lead screw converts its rotational motion into axial linear feed motion, thereby driving the pressure head 52 to move towards or away from the heating module.

[0049] In some other specific embodiments of this utility model, the driving component 51 is any one of an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder, and the contact pressure is automatically adjusted and precisely controlled by an external control signal.

[0050] Furthermore, an elastic element is provided between the pressure head 52 and the cold plate. This elastic element, positioned between the pressure head 52 and the bearing seat of the cold plate, provides cushioning and converts the rigid displacement of the pressure head 52 into an elastic preload on the cold plate. When the driving component 51 drives the pressure head 52 downwards, the pressure head 52 first compresses the elastic element, which then flexibly transmits the clamping force to the cold plate, causing the cold plate to press against the heating module with an elastic clamping force. The introduction of the elastic element avoids rigid impact and damage to the heat interface material and the surface of the cold plate caused by excessive handwheel operation. Furthermore, during long-term testing, when the component dimensions undergo slight changes due to thermal expansion or creep of the heat interface material, the elastic element can automatically compensate for geometric changes, maintaining a essentially constant contact pressure and ensuring the stability and consistency of the contact pressure at any angle.

[0051] In some specific embodiments of this utility model, the elastic element is a disc spring assembly. The disc spring assembly has the characteristics of high stiffness, small deformation, and high load-bearing capacity, and can provide sufficient and stable preload within a limited space.

[0052] In some other specific embodiments of this utility model, the elastic element is a cylindrical helical spring.

[0053] In some specific embodiments of this utility model, a limiting groove 34 is provided at one end of the third panel 33 opposite to the second panel 32. The size of the limiting groove 34 is adapted to the size of the pressure head 52, and the limiting groove 34 is used to limit the pressure head 52. Specifically, the limiting groove 34 is formed by recessing downward along the thickness direction of the third panel 33 on the upper surface of the third panel 33. The size of the limiting groove 34 is adapted to the size of the pressure head 52, and the lower end of the pressure head 52 is embedded in the limiting groove 34 and forms a fit with the inner wall of the groove. In this position, the limiting groove 34 acts as a guide and limiter when the pressure head 52 transmits pressure to the cold plate, preventing radial deviation of the pressure head 52 during long-term use or angle switching, thus ensuring the directionality and stability of pressure transmission. On the other hand, during multi-angle rotation testing, when the tooling is in an inclined or vertical posture, the limiting groove 34 can form a reliable centering constraint on the pressure head 52, preventing the pressure head 52 from laterally sliding due to the gravity component, further ensuring the working reliability of the pressure regulating mechanism 5 under different spatial postures.

[0054] In some specific embodiments of this utility model, the sensing and acquisition mechanism includes: a first temperature sensor arranged in the boss 311, which is used to detect the temperature of the cold plate; a second temperature sensor arranged at one end of the heat spreader 41 near the test gap, which is used to detect the temperature of the heating module; and a pressure sensor arranged on the pressure head 52, which is used to detect the contact pressure.

[0055] Specifically, the first temperature sensor is embedded inside the boss 311 near its bottom surface. The sensing end face of the first temperature sensor is flush with the bottom surface of the boss 311. When the thermal interface material is sandwiched between the cold plate and the heating module, the first temperature sensor detects the temperature of the cold plate at a position close to the contact interface between the thermal interface material and the cold plate, and can obtain data that is closest to the true temperature of the cold end interface. In some specific embodiments of this utility model, the first temperature sensor includes at least four thermocouples or RTD temperature sensors arranged at equal intervals along the axial direction of the boss 311. The probes are embedded in the boss 311 and their end faces are flush with the contact surface of the thermal interface material, used to obtain the temperature distribution along the axial direction of the cold plate surface.

[0056] Specifically, the second temperature sensor is embedded inside the heat spreader 41 near the heating end face. The sensing end face of the second temperature sensor is flush with the heating end face of the heat spreader 41. The temperature of the heating module is detected at the position close to the contact interface between the thermal interface material and the heating module to obtain data that is closest to the actual temperature of the thermal interface.

[0057] Specifically, the pressure head 52 is positioned between the output end of the drive component 51 and the cold plate. The driving force output by the drive component 51 is transmitted to the cold plate via the pressure head 52, and then converted into contact pressure applied to the hot interface material. The pressure sensor is positioned on the force transmission path of the pressure head 52 to detect the pressure value applied to the cold plate by the drive component 51 in real time, ensuring the consistency of contact pressure under different test batches or different test angles.

[0058] In some specific embodiments of this utility model, a collection mechanism 6 is also included. The collection mechanism 6 is disposed at one end of the second test module 4 away from the first test module 3 and rotates together with the second test module 4. The collection mechanism 6 is used to collect the thermal interface material that is squeezed out from the test gap during the test.

[0059] like Figure 5As shown, the collection mechanism 6 is fixedly installed below the heating module and relatively fixed to the heating module. When the multi-angle adjustment mechanism 2 drives the first test module 3 and the second test module 4 to rotate synchronously, the collection mechanism 6 rotates together with the heating module, so that the collection mechanism 6 is always located below the gravity of the test gap. During the test, the hot interface material will be slowly squeezed out from the edge of the test gap under the combined action of the cold plate and the heating module. The squeezed hot interface material flows downward or falls under the action of gravity. Since the collection mechanism 6 is set below the heating module and rotates with the test system, at any test angle, the collection mechanism 6 can receive the hot interface material squeezed out from the test gap, realizing the effective collection of the pumped material.

[0060] In some specific embodiments of this utility model, the collection mechanism 6 includes a collection tray, which is a disc-shaped container with its opening facing the test gap direction, used to receive the extruded thermal interface material. Further, the collection tray is configured to be removable from the test station for off-site weighing. That is, after the test at each preset test angle, the operator can remove the collection tray from the test station and weigh it using an external high-precision electronic balance. By comparing the mass difference of the collection tray before and after the test, the mass of the pumped material at that angle is obtained. After weighing, the collection tray is returned to its original position, and the pumping test at the next angle continues. By sequentially traversing each preset test angle, the variation law of the pumping amount of the thermal interface material with the angle under different spatial postures is obtained. This transforms the pumping behavior, which was originally impossible to quantitatively assess, into measurable quantitative data, overcoming the shortcomings of traditional tests that rely solely on visual qualitative judgment of the pumping degree. This provides experimental evidence for comprehensively evaluating the long-term service reliability of thermal interface materials under different spatial postures.

[0061] Specifically, the aggregate tray is made of high-temperature and corrosion-resistant materials, which can meet the chemical compatibility requirements of different types of thermal interface materials during testing.

[0062] In some specific embodiments of this utility model, the sensing and acquisition mechanism also includes an image acquisition device for periodically taking pictures of the material collection tray as an auxiliary qualitative record of the pumping behavior.

[0063] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present utility model.

Claims

1. A multi-angle aging test fixture for measuring thermal interface materials, characterized in that, include: Rack (1); A multi-angle adjustment mechanism (2) is mounted on the frame (1); The first test module (3) and the second test module (4) are disposed on the multi-angle adjustment mechanism (2) and arranged opposite to each other. A test gap for placing thermal interface material is formed between the first test module (3) and the second test module (4). The multi-angle adjustment mechanism (2) drives the first test module (3) and the second test module (4) to rotate synchronously to adjust the tilt angle of the test gap. A pressure regulating mechanism (5) is provided on the frame (1). The pressure regulating mechanism (5) is connected to the first test module (3). The pressure regulating mechanism (5) is used to drive the first test module (3) and the second test module (4) to move closer or further apart to adjust the contact pressure applied to the thermal interface material. A sensing and acquisition mechanism is mounted on the frame (1) and is used to detect the temperature of the first test module (3) and the second test module (4).

2. The multi-angle measurement fixture for thermal interface material aging testing according to claim 1, characterized in that, The multi-angle adjustment mechanism (2) includes: A rotating base (21) is rotatably mounted on the frame (1), and the first test module (3) and the second test module (4) are both mounted on the rotating base (21); An angle locking component (22) is disposed on the frame (1). The angle locking component (22) is connected to the rotating seat (21). The angle locking component (22) is used to lock the rotating seat (21) at a preset test angle.

3. The multi-angle measurement fixture for thermal interface material aging testing according to claim 2, characterized in that, The angle locking component (22) includes: A rotating disk (221) is rotatably mounted on the frame (1) and fixedly connected to the rotating seat (21). The rotating disk (221) has multiple angle positioning holes (222) along its circumference. The positioning pin (223) is movably mounted on the frame (1). The positioning pin (223) is adapted to the angle positioning hole (222). When the positioning pin (223) and the angle positioning hole (222) are engaged, the rotating disk (221) is locked at a preset test angle.

4. The multi-angle measurement fixture for thermal interface material aging testing according to claim 2, characterized in that, The first test module (3) is a cold plate, and the second test module (4) is a heating module. The heating module is used to provide controllable heating heat flow, and the cold plate is used to cool the end of the thermal interface material away from the heating module.

5. The multi-angle measurement fixture for thermal interface material aging testing according to claim 4, characterized in that, The heating module includes a heat spreader (41) fixedly mounted on the rotating base (21), and a resistance heating element is provided inside the heat spreader (41).

6. The multi-angle measurement fixture for thermal interface material aging testing according to claim 5, characterized in that, The cold plate includes: The first panel (31) is disposed on the upper end of the heat exchange carrier (41). The first panel (31) has a boss (311) at one end near the heat exchange carrier (41). The first panel (31) has a microchannel (312) integrated inside. The second panel (32) is disposed at the end of the first panel (31) away from the heat carrier (41). The second panel (32) has an integrated water channel (322) inside, and a first sealing gasket (321) is disposed between the second panel (32) and the first panel (31). The third panel (33) is disposed at the end of the second panel (32) away from the first panel (31), and a second sealing gasket (331) is disposed between the third panel (33) and the second panel (32).

7. The multi-angle measurement fixture for thermal interface material aging testing according to claim 6, characterized in that, The pressure regulating mechanism (5) includes: A drive unit (51) is disposed on the rotating base (21); The pressure head (52) is located at the output end of the drive unit (51). The pressure head (52) abuts against the end of the cold plate away from the heating module. The drive unit (51) is used to drive the pressure head (52) to move the cold plate closer to or away from the heating module.

8. The multi-angle measurement fixture for thermal interface material aging testing according to claim 7, characterized in that, The third panel (33) is provided with a limiting groove (34) at one end away from the second panel (32). The size of the limiting groove (34) is adapted to the size of the pressure head (52). The limiting groove (34) is used to limit the pressure head (52).

9. The multi-angle measurement fixture for thermal interface material aging testing according to claim 7, characterized in that, The sensing and data acquisition mechanism includes: A first temperature sensor is arranged inside the boss (311), and the first temperature sensor is used to detect the temperature of the cold plate; A second temperature sensor is arranged at one end of the heat spreader (41) near the test gap. The second temperature sensor is used to detect the temperature of the heating module. A pressure sensor is disposed on the pressure head (52) and is used to detect contact pressure.

10. The multi-angle measurement fixture for thermal interface material aging according to claim 1, characterized in that, It also includes a collection mechanism (6), which is located at one end of the second test module (4) away from the first test module (3) and rotates together with the second test module (4). The collection mechanism (6) is used to collect the thermal interface material that is squeezed out from the test gap during the test.

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