A method and apparatus for testing contact thermal resistance

Abstract

This invention belongs to the field of electronic component thermal resistance testing technology, and in particular, a contact thermal resistance testing method and thermal resistance testing device; comprising: a chassis and a control module; a testing component and a first lifting mechanism for driving the testing component to rise and fall; a testing base and a servo drive mechanism for driving the testing base to move, wherein a clamping component for clamping the test piece is installed on the testing base; an adhesive application and pressing component and a second lifting mechanism for driving the adhesive application and pressing component to rise and fall; the adhesive application and pressing component includes a connecting plate, a fixed base is fixedly connected to the lower surface of the connecting plate, a rotary motor is installed below the fixed base, and a pressure head is fixedly connected to the rotating shaft of the rotary motor; a cleaning component is installed below the fixed base; the adhesive application and pressing component of this invention, by providing an adhesive application frame and a pressure head, allows thermal paste to be evenly injected into the adhesive receiving hole in the adhesive application frame, and the pressure head is rotated by the rotary motor during the pressing process, ensuring the uniformity and consistency of the thermal paste pressing.

Description

Technical Field

[0001] This invention relates to the field of thermal resistance testing technology for electronic components, and in particular to a contact thermal resistance testing method and a thermal resistance testing device. Background Technology

[0002] As electronic devices evolve towards higher power density and miniaturization, heat dissipation has become an increasingly critical factor restricting product performance and reliability. In the design of electronic device packaging and heat dissipation systems, the contact thermal resistance between heat-generating components (such as chips and power modules) and heat sinks is a crucial parameter affecting overall heat dissipation efficiency. To accurately evaluate the performance of heat dissipation interface materials (such as thermal paste and thermal pads) and the thermal characteristics of the contact interface, standardized measurements of samples are required using contact thermal resistance testing equipment.

[0003] In existing contact thermal resistance testing technologies, the test piece and the test sensor need to be in good contact, and a certain pressure needs to be applied at the interface. To eliminate the influence of interfacial air gaps on thermal resistance, thermal paste (thermal grease) or thermal pads are often applied to the test surface. However, existing devices still have the following shortcomings in actual operation: poor uniformity and consistency of application: thermal paste is usually applied to the surface of the test piece or the end face of the test sensor using a scraper. During the scraper application process, it is difficult to accurately control the thickness and uniformity of the paste layer, affecting the repeatability and comparability of the test results; difficulty in cleaning up excess paste: during the paste application and pressing test, excess thermal paste will be squeezed out from the edge of the contact surface and adhere to the surface of the test piece, the surface of the test sensor, and the clamping components, which is inconvenient to clean. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a contact thermal resistance testing method and a thermal resistance testing device, aiming to solve the problems in the background technology.

[0005] To achieve the above technical objectives, the specific technical solution of the present invention is as follows: The present invention proposes a contact thermal resistance testing device, comprising: a chassis and a control module, with a first fixed frame and a second fixed frame fixedly mounted on the top of the chassis; a testing component and a first lifting mechanism for driving the testing component to rise and fall, the first lifting mechanism being fixedly mounted on the first fixed frame; a testing seat and a servo drive mechanism for driving the testing seat to move, the testing seat being equipped with a clamping component for clamping the test piece; an adhesive application and pressing component and a second lifting mechanism for driving the adhesive application and pressing component to rise and fall, the second lifting mechanism being fixedly mounted on the second fixed frame; the adhesive application... The pressing assembly includes a connecting plate, a fixed base fixedly connected to the lower surface of the connecting plate, a rotary motor mounted below the fixed base, and a pressure head fixedly connected to the shaft of the rotary motor; a frame is connected below the connecting plate, and an elastic mechanism connects the frame and the connecting plate; a glue application frame that can contact the surface of the test piece is fixedly connected to the lower surface of the frame; a pair of glue injection nozzles are installed on both sides of the glue application frame; a glue receiving hole that mates with the pressure head is provided in the center of the glue application frame; thermal conductive paste is injected into the glue receiving hole through the glue injection nozzles; and the pressure head evenly presses the thermal conductive paste onto the surface of the test piece; a cleaning assembly is installed below the fixed base for scraping off excess thermal conductive paste from the surface of the test piece and the inner wall of the glue injection hole.

[0006] As a preferred embodiment of the above technical solution, the cleaning assembly includes a rotating seat, a bracket fixedly connected to the bottom of the rotating seat, and a scraper fixedly connected to the end of the bracket, wherein the rotating seat is rotatably connected to the bottom of the fixed seat.

[0007] As a preferred embodiment of the above technical solution, a gear ring is mounted on the rotating base, a drive motor is mounted on the fixed base, and a gear that meshes with the gear ring is fixedly connected to the shaft of the drive motor.

[0008] As a preferred embodiment of the above technical solution, the pressure head has a vacuum structure inside and multiple adsorption holes on its lower surface, and a heat-conducting sheet is adsorbed and connected to the lower surface of the pressure head.

[0009] As a preferred embodiment of the above technical solution, a sealing gasket is connected to the lower surface of the glue application frame to seal the glue application frame and the test piece.

[0010] As a preferred embodiment of the above technical solution, the test assembly includes a lifting frame, an elastic seat, and a test sensor mounted on the lower surface of the elastic seat, wherein an elastic structure connects the elastic seat and the lifting frame.

[0011] As a preferred embodiment of the above technical solution, the clamping assembly includes a U-shaped seat and a clamping seat. A pair of second sliders are slidably connected to one side of the U-shaped seat, and clamping plates are fixedly connected to the second sliders. The two clamping plates are used to clamp the two sides of the test piece respectively.

[0012] As a preferred embodiment of the above technical solution, a pair of sliding rods are fixedly connected to both sides of the U-shaped seat, a first slider is slidably connected to the sliding rods, a connecting rod is rotatably connected between the first slider and the second slider, a sleeve that slides with the sliding rods is fixedly connected to the pressing seat, a cylindrical spring is connected to the surface of the sliding rods, and the cylindrical spring is located between the first slider and the sleeve.

[0013] As a preferred embodiment of the above technical solution, a push cylinder is installed on the test seat to drive the clamping seat to move. A movable seat is slidably connected to the test seat, and the movable seat is engaged with a U-shaped seat. An adjusting screw is connected to the movable seat, and a screw seat that cooperates with the adjusting screw is fixedly installed on the test seat.

[0014] A method for testing contact thermal resistance includes the following steps:

[0015] Step 1: Place the test piece on the test stand and clamp it in place using the clamping assembly; use the control module to control the servo drive mechanism to move the test stand directly below the adhesive application and pressing assembly;

[0016] Step 2: Activate the second lifting mechanism to make the glue application frame make sealed contact with the surface of the test piece; inject thermal grease into the glue-receiving hole through the glue injection nozzle; then the glue application and pressing assembly continues to descend, the pressure head presses the thermal grease, and at the same time the rotating motor drives the pressure head to rotate, so that the thermal grease is evenly pressed onto the surface of the test piece to form a thermal grease layer.

[0017] Step 3: Start the cleaning component. The drive motor rotates the scraper to scrape off the excess thermal paste squeezed out from the surface of the test piece and the inner wall of the adhesive hole. Then the second lifting mechanism rises and resets, leaving the thermal pad on the thermal paste layer. The scraper is then manually wiped clean.

[0018] Step 4: Move the test stand directly below the test component using the servo drive mechanism; activate the first lifting mechanism to bring the test sensor into contact with the test piece and apply the set pressure, and collect the contact thermal resistance data;

[0019] Step 5: Reset the first lifting mechanism, release the clamping assembly, remove the test piece, and complete one contact thermal resistance test.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The adhesive coating and pressing assembly of the present invention is equipped with an adhesive coating frame and a pressing head. Thermal conductive paste is evenly injected into the adhesive receiving hole in the adhesive coating frame. The pressing head descends into the adhesive receiving hole and presses the thermal conductive paste onto the surface of the test sensor. During the pressing process, the pressing head is rotated by a rotary motor, which ensures the uniformity and consistency of the thermal conductive paste pressing. Throughout the pressing process, the thermal conductive paste is kept inside the adhesive coating frame, which prevents the thermal conductive paste from being squeezed out and flowing into the test seat.

[0022] 2. This invention has a cleaning component that can rotate circumferentially installed under the fixed base. During the pressing process of the pressure head, the thermally conductive adhesive is squeezed out by the pressure head and flows into the glue application frame. The scraper is driven by the drive motor to rotate, which can scrape off and clean the excess thermally conductive paste, effectively preventing the residual adhesive from affecting the contact state of subsequent tests. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a contact thermal resistance testing device proposed in this invention.

[0024] Figure 2 This is a schematic diagram of the adhesive coating and pressing assembly proposed in this invention.

[0025] Figure 3 This is a front view schematic diagram of the adhesive bonding assembly proposed in this invention.

[0026] Figure 4 This is a schematic diagram of the pressure head and cleaning assembly proposed in this invention.

[0027] Figure 5 This is a schematic diagram of the structure of the test component proposed in this invention.

[0028] Figure 6 This is a schematic diagram of the test stand proposed in this invention.

[0029] Figure 7 This is a schematic diagram of the clamping assembly proposed in this invention.

[0030] The corresponding names of the reference numerals in the figure are as follows: 1. Chassis; 2. Control module; 3. Test component; 4. Glue application and pressing component; 5. First lifting mechanism; 6. Second lifting mechanism; 7. Test base; 8. Servo drive mechanism; 9. First fixing frame; 10. Second fixing frame; 31. Lifting frame; 32. Elastic base; 33. Test sensor; 34. Elastic structure; 41. Connecting plate; 42. Frame; 43. Glue application frame; 44. Glue receiving hole; 45. Glue injection nozzle; 46. Sealing gasket; 47. Elastic mechanism; 48. 49. Pressure head; 70. Rotary motor; 71. Screw seat; 72. Moving seat; 73. U-shaped seat; 74. Pressing seat; 75. Rod sleeve; 76. Slide rod; 77. First slider; 78. Cylindrical spring; 79. Second slider; 710. Clamping plate; 711. Connecting rod; 712. Push cylinder; 713. Adjusting screw; 410. Gear ring; 411. Drive motor; 412. Gear; 413. Fixed seat; 414. Rotating seat; 415. Bracket; 416. Scraper; 417. Heat-conducting plate; 418. Adsorption hole. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example: This example discloses a contact thermal resistance testing device, such as... Figures 1-7 As shown, the system includes a chassis 1, a control module 2, a test component 3, a test base 7, and an adhesive application and pressing assembly 4. A first fixing frame 9 and a second fixing frame 10 are fixedly installed on the top of the chassis 1. A first lifting mechanism 5 is fixedly installed on the first fixing frame 9, which is used to drive the test component 3 to rise and fall. A servo drive mechanism 8 is installed on the chassis 1 to drive the test base 7 to move. The servo drive mechanism 8 adopts a transmission mechanism of motor and lead screw. A clamping assembly for holding the test piece is installed on the test base 7. A second lifting mechanism 6 is fixedly installed on the second fixing frame 10 to drive the adhesive application and pressing assembly 4 to rise and fall. Both the first lifting mechanism 5 and the second lifting mechanism 6 are controlled by cylinders. In specific implementation, the test piece is placed on the test base 7 and clamped and fixed by the clamping assembly. Then, the servo drive mechanism 8 drives the test base 7 to move to a position directly below the adhesive application and pressing assembly 4. The adhesive application and pressing assembly 4 applies a thermally conductive adhesive layer to the surface of the test piece. Then, the servo drive mechanism 8 drives the test base 7 to move below the test component 3. The test component 3 descends to perform thermal resistance testing on the test piece.

[0033] like Figures 2-4As shown, specifically, the adhesive application and pressing assembly 4 includes a connecting plate 41, which is fixedly connected to the second lifting mechanism 6. A fixed seat 413 is fixedly connected to the lower surface of the connecting plate 41, and a rotary motor 49 is installed below the fixed seat 413. A pressure head 48 is fixedly connected to the shaft of the rotary motor 49, and the rotary motor 49 can drive the pressure head 48 to rotate. A frame 42 is connected below the connecting plate 41, and an elastic mechanism 47 is connected between the frame 42 and the connecting plate 41. The elastic mechanism 47 adopts a sliding rod and spring cooperation structure. An adhesive application frame 43 that can contact the surface of the test piece is fixedly connected to the lower surface of the frame 42. A pair of glue injection nozzles 45 are installed on both sides of the adhesive application frame 43. The center of the adhesive application frame 43 is provided with a glue receiving hole 44 that cooperates with the pressure head 48. The diameter of the glue receiving hole 44 is larger than the diameter of the pressure head 48, and the glue receiving hole 44 is circular. Thermal paste is passed through it. The thermally conductive adhesive is injected into the adhesive receiving hole 44 through the dispensing nozzle 45, and the pressure head 48 presses the thermally conductive adhesive evenly onto the surface of the test piece. In specific implementation: after the test piece is moved directly below the adhesive application and pressing assembly 4, the second lifting mechanism 6 drives the adhesive application and pressing assembly 4 to descend, so that the adhesive application frame 43 contacts the surface of the test piece. Then, the dispensing nozzle 45 injects the thermally conductive adhesive into the adhesive receiving hole 44. Then, the second lifting mechanism 6 drives the connecting plate 41 and the pressure head 48 to continue to descend. The pressure head 48 presses the thermally conductive adhesive evenly onto the surface of the test piece, forming a layer of thermally conductive adhesive in the center of the test piece. During the pressing process, the rotary motor 49 drives the pressure head 48 to rotate, so that the thickness of the formed thermally conductive adhesive layer is uniform. During the entire pressing process, the thermally conductive adhesive is inside the adhesive application frame 43, forming a sealed area, which prevents the thermally conductive adhesive from being squeezed into the test seat 7, making it easy to clean later.

[0034] To facilitate cleaning of the inner wall of the glue application frame 43, this embodiment includes a cleaning assembly installed below the fixed base 413. Specifically, the cleaning assembly includes a rotating base 414, a bracket 415 fixedly connected below the rotating base 414, and a scraper 416 fixedly connected to the end of the bracket 415. When the pressure head 48 descends into the glue-receiving hole 44, the end of the scraper 416 contacts the inner wall of the glue-receiving hole 44, and the bottom of the scraper 416 contacts the surface of the test piece. The rotating base 414 is rotatably connected below the fixed base 413. A gear ring 410 is installed on the rotating base 414, and a drive motor 411 is installed on the fixed base 413. The drive motor 411 has a fixed shaft connected to a gear 412 that meshes with the gear ring 410. After the thermal paste is pressed, some of the excess thermal paste is squeezed into the adhesive cavity 44. The drive motor 411 drives the gear 412 to rotate, which in turn drives the gear ring 410 and the rotating seat 414 to rotate, thereby driving the bracket 415 and the scraper 416 to rotate circumferentially. When the scraper 416 rotates, it scrapes and cleans the excess thermal paste from the inner wall of the adhesive cavity 44 and the surface of the test piece. After cleaning, the second lifting mechanism 6 drives the adhesive pressing assembly 4 to rise and reset. The operator can then clean the scraper 416.

[0035] Preferably, the pressure head 48 has a vacuum structure inside and multiple adsorption holes 418 on its lower surface. The pressure head 48 is connected to an external vacuum generator. A heat-conducting sheet 417 is adsorbed and connected to the lower surface of the pressure head 48. The heat-conducting sheet 417 can be made of copper, with a thickness of about 0.1 mm and a smooth surface. After the thermal paste is pressed onto the surface of the test piece, the vacuum generator is turned off and the pressure head 48 rises. The heat-conducting sheet 417 remains on the surface of the thermal paste layer, thus avoiding the thermal paste adhering to the surface of the pressure head 48 and ensuring that the pressing surface is uniform and flat. The heat-conducting sheet 417 is made of copper, which has good heat transfer properties and its influence on the thermal resistance test results is negligible.

[0036] Preferably, a sealing gasket 46 is connected to the lower surface of the coating frame 43 to seal between the coating frame 43 and the test piece, so as to prevent the thermal paste from being squeezed out of the coating frame 43.

[0037] like Figure 5 As shown, the test assembly 3 includes a lifting frame 31, an elastic seat 32, and a test sensor 33 mounted on the lower surface of the elastic seat 32. An elastic structure 34 is connected between the elastic seat 32 and the lifting frame 31, and the test sensor 33 can make uniform contact with the surface of the test piece through the elastic structure 34.

[0038] like Figures 6-7 As shown, the clamping assembly includes a U-shaped seat 73 and a clamping seat 74. A pair of second sliders 79 are slidably connected to one side of the U-shaped seat 73, and clamping plates 710 are fixedly connected to the second sliders 79. The two clamping plates 710 are used to clamp the two sides of the test piece respectively. A pair of sliding rods 76 are fixedly connected to the two inner sides of the U-shaped seat 73. A first slider 77 is slidably connected to the sliding rods 76. A connecting rod 711 is rotatably connected between the first slider 77 and the second sliders 79. A sleeve 75 that slidably engages with the sliding rods 76 is fixedly connected to the clamping seat 74. A cylindrical spring 78 is connected to the surface of the sliding rods 76 and is located between the first slider 77 and the sleeve 75. A push cylinder 712 is installed on the test seat 7 to drive the clamping seat 74 to move. A movable seat 72 is connected to the test base 7, which engages with a U-shaped seat 73 for easy disassembly of the U-shaped seat 73. An adjusting screw 713 is connected to the movable seat 72. A screw seat 71, which is connected to the adjusting screw 713, is fixedly installed on the test base 7. The adjusting screw 713 is fixedly connected to the screw seat 71 by a pair of nuts for easy adjustment of the position of the clamping assembly. In specific implementation: by placing the test piece between the two clamping plates 710, the cylinder 712 is pushed to move the clamping seat 74 toward the U-shaped seat 73. The sleeve 75 drives the first slider 77 to slide through the cylindrical spring 78. The first slider 77 drives the second slider 79 to move through the connecting rod 711, causing the two clamping plates 710 to move closer to each other and clamp and fix the test piece.

[0039] This embodiment also discloses a method for testing contact thermal resistance, including the following steps:

[0040] Step 1: Place the test piece on the test stand 7 and clamp it in place using the clamping assembly; control the servo drive mechanism 8 via the control module 2 to move the test stand 7 directly below the adhesive application and pressing assembly 4;

[0041] Step 2: Adsorb the clean thermal conductive sheet 417 onto the lower surface of the pressure head 48, and start the second lifting mechanism 6 to make the glue application frame 43 seal in contact with the surface of the test piece; inject thermal conductive paste into the glue receiving hole 44 through the glue injection nozzle 45; the glue application and pressing assembly 4 continues to descend, driving the pressure head 48 to move into the glue receiving hole 44, and the pressure head 48 presses the thermal conductive paste evenly onto the surface of the test piece. During the pressing process, the rotary motor 49 drives the pressure head 48 to rotate, thereby forming a uniform thermal conductive adhesive layer on the surface of the test piece;

[0042] Step 3: Start the cleaning assembly. Drive the motor 411 to rotate the scraper 416 and scrape off the excess thermal paste squeezed out from the surface of the test piece and the inner wall of the adhesive hole 44. Then the second lifting mechanism 6 rises and resets, leaving the thermal pad 417 on the thermal adhesive layer. The scraper 416 is then manually wiped clean.

[0043] Step 4: Move the test stand 7 directly below the test component 3 using the servo drive mechanism 8; activate the first lifting mechanism 5 to make the test sensor 33 contact the test piece and apply the set pressure, and collect the contact thermal resistance data;

[0044] Step 5: The first lifting mechanism 5 is reset, the clamping assembly is released, the test piece is removed, and a contact thermal resistance test is completed.

[0045] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A contact thermal resistance testing device, characterized in that, include: The chassis (1) and the control module (2) are fixedly installed on the top of the chassis (1), with a first fixing bracket (9) and a second fixing bracket (10). The test component (3) and the first lifting mechanism (5) for driving the test component (3) to rise and fall, the first lifting mechanism (5) is fixedly installed on the first fixed frame (9); Test stand (7) and servo drive mechanism (8) for moving the test stand (7), wherein the test stand (7) is equipped with a clamping assembly for clamping the test piece; The adhesive pressing assembly (4) and the second lifting mechanism (6) for driving the adhesive pressing assembly (4) to rise and fall, the second lifting mechanism (6) being fixedly mounted on the second fixed frame (10); The adhesive pressing assembly (4) includes a connecting plate (41), a fixed seat (413) is fixedly connected to the lower surface of the connecting plate (41), a rotary motor (49) is installed below the fixed seat (413), and a pressure head (48) is fixedly connected to the rotating shaft of the rotary motor (49). A frame (42) is connected below the connecting plate (41), and an elastic mechanism (47) is connected between the frame (42) and the connecting plate (41). A glue-applying frame (43) that can contact the surface of the test piece is fixedly connected to the lower surface of the frame (42). A pair of glue-injecting nozzles (45) are installed on both sides of the glue-applying frame (43). A glue-receiving hole (44) that cooperates with the pressure head (48) is provided in the center of the glue-applying frame (43). Thermal paste is injected into the glue-receiving hole (44) through the glue-injecting nozzle (45), and the pressure head (48) presses the thermal paste evenly onto the surface of the test piece. A cleaning component is installed below the mounting base (413) for scraping off excess thermal paste from the surface of the test piece and the inner wall of the injection hole (44).

2. The contact thermal resistance testing device according to claim 1, characterized in that, The cleaning assembly includes a rotating seat (414), a bracket (415) fixedly connected to the bottom of the rotating seat (414), and a scraper (416) fixedly connected to the end of the bracket (415). The rotating seat (414) is rotatably connected to the bottom of the fixed seat (413).

3. The contact thermal resistance testing device according to claim 2, characterized in that, A gear ring (410) is mounted on the rotating seat (414), and a drive motor (411) is mounted on the fixed seat (413). The shaft of the drive motor (411) is fixedly connected to a gear (412) that meshes with the gear ring (410).

4. The contact thermal resistance testing device according to claim 1, characterized in that, The pressure head (48) has a vacuum structure inside and multiple adsorption holes (418) on its lower surface. A heat-conducting sheet (417) is adsorbed and connected to the lower surface of the pressure head (48).

5. The contact thermal resistance testing device according to claim 1, characterized in that, A sealing gasket (46) is connected to the lower surface of the glue application frame (43) for sealing the glue application frame (43) and the test piece.

6. The contact thermal resistance testing device according to claim 1, characterized in that, The test assembly (3) includes a lifting frame (31), an elastic seat (32), and a test sensor (33) installed on the lower surface of the elastic seat (32). An elastic structure (34) is connected between the elastic seat (32) and the lifting frame (31).

7. The contact thermal resistance testing device according to claim 1, characterized in that, The clamping assembly includes a U-shaped seat (73) and a clamping seat (74). A pair of second sliders (79) are slidably connected to one side of the U-shaped seat (73). A clamping plate (710) is fixedly connected to the second slider (79). The two clamping plates (710) are used to clamp the two sides of the test piece respectively.

8. The contact thermal resistance testing device according to claim 7, characterized in that, A pair of sliding rods (76) are fixedly connected to both sides of the U-shaped seat (73). A first slider (77) is slidably connected to the sliding rod (76). A connecting rod (711) is rotatably connected between the first slider (77) and the second slider (79). A sleeve (75) that slides with the sliding rod (76) is fixedly connected to the pressing seat (74). A cylindrical spring (78) is connected to the surface of the sliding rod (76). The cylindrical spring (78) is located between the first slider (77) and the sleeve (75).

9. A contact thermal resistance testing device according to claim 7, characterized in that, The test seat (7) is equipped with a push cylinder (712) for moving the clamping seat (74). A movable seat (72) is slidably connected to the test seat (7). The movable seat (72) is engaged with the U-shaped seat (73). An adjusting screw (713) is connected to the movable seat (72). A screw seat (71) that is engaged with the adjusting screw (713) is fixedly installed on the test seat (7).

10. A method for testing contact thermal resistance, utilizing the contact thermal resistance testing device as described in claim 3, characterized in that, Includes the following steps: Step 1: Place the test piece on the test stand (7) and clamp it in place using the clamping assembly; control the servo drive mechanism (8) via the control module (2) to move the test stand (7) directly below the adhesive application and pressing assembly (4); Step 2: Start the second lifting mechanism (6) to make the glue application frame (43) seal the surface of the test piece; inject thermal grease into the glue receiving hole (44) through the glue injection nozzle (45); then the glue application and pressing assembly (4) continues to descend, the pressure head (48) presses the thermal grease, and at the same time the rotating motor (49) drives the pressure head (48) to rotate, so that the thermal grease is evenly pressed onto the surface of the test piece to form a thermal grease layer; Step 3: Start the cleaning assembly, drive the scraper (416) to rotate via the drive motor (411) to scrape off the excess thermal paste squeezed out from the surface of the test piece and the inner wall of the adhesive hole (44); then the second lifting mechanism (6) rises and resets, leaving the thermal pad (417) on the thermal adhesive layer; manually wipe and clean the scraper (416); Step 4: Move the test stand (7) directly below the test component (3) using the servo drive mechanism (8); activate the first lifting mechanism (5) to make the test sensor (33) contact the test piece and apply the set pressure, and collect the contact thermal resistance data; Step 5: The first lifting mechanism (5) is reset, the clamping assembly is released, the test piece is taken out, and a contact thermal resistance test is completed.

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