Automatic Thermal Grease Cutting and Attaching Device and Its Usage Method

Abstract

The present invention relates to the technical field of cutting and attaching devices, and discloses an automatic cutting and attaching device for heat dissipation paste and its use method. The device includes a robotic arm and a cutting and attaching mechanism; the robotic arm is connected to the cutting and attaching mechanism and is used to drive the cutting and attaching mechanism to move back and forth between a cutting position and an attaching position; the cutting and attaching mechanism includes a connecting frame, a driving unit, a limiting unit, an adsorption unit, and a cutting unit; the output end of the driving unit is connected to the connecting frame and is used to drive the connecting frame to move along the cutting direction; the limiting unit and the adsorption unit are installed on the connecting frame; the cutting unit is sleeved outside the adsorption unit and is used to cut the heat dissipation paste; the adsorption unit is used to adsorb the cut heat dissipation paste after the cutting unit cuts the heat dissipation paste; the limiting unit is used to limit the cutting unit when the cutting unit cuts the heat dissipation paste. The automatic cutting and attaching device for heat dissipation paste and its use method of the present invention can improve the processing efficiency, reduce the working intensity, and also reduce the damage probability of the heat dissipation paste.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting and attaching devices, and particularly to an automatic cutting and attaching device for thermal paste and its usage method. Background Art

[0002] Thermal paste, also known as heat-conducting paste, is a paste-like substance with good thermal conductivity (but mostly non-conductive). It is generally used on the interface between a heat sink and a heat source (such as a high-power semiconductor component). The main function of thermal paste is to remove air or gaps (air has poor thermal conductivity) at the interface, so as to maximize the heat conduction amount.

[0003] During the production and manufacturing process of intelligent terminal products, thermal paste is used to help devices dissipate heat. As Figure 1 shown, for the thermal paste 32, a release film 33 is adhered to the upper surface, and a bottom film 34 is adhered to the lower surface. In order to facilitate processing and use in manufacturing factories, the existing thermal paste 32 has been pre-processed when it comes in, and the thermal paste 32 is cut into small pieces. When in need of use, an operator peels the small piece of release film 33 from the thermal paste 32, then peels the thermal paste 32 from the bottom film 34, and finally pastes the thermal paste 32 at the position where it needs to be pasted on the attaching position.

[0004] Although this technical solution cuts the thermal paste 32 into small pieces for convenient use, however, this technical solution still has the following disadvantages: 1. Since during use, the release film 33 cut into small pieces is peeled off from the surface of the thermal paste 32 manually, it results in high labor intensity and low work efficiency; 2. Since it is easy to damage the thermal paste 32 during the manual peeling process of the release film 33, causing material waste and thus increasing the cost; 3. After the thermal paste 32 is cut into small pieces, the selling price is high and the raw material cost is high. Summary of the Invention

[0005] The present invention aims to provide an automatic cutting and attaching device for thermal paste and its usage method to improve work efficiency, reduce labor intensity, and at the same time, reduce the damage probability of the thermal paste.

[0006] To achieve the above object, the present invention adopts the following technical solution: The automatic cutting and attaching device for heat dissipation paste includes a robotic arm and a cutting and attaching mechanism; the robotic arm is connected to the cutting and attaching mechanism and is used to drive the cutting and attaching mechanism to move back and forth between the cutting position and the attaching position; the cutting and attaching mechanism includes a connecting frame, a driving unit, a limiting unit, an adsorption unit, and a cutting unit; the output end of the driving unit is connected to the connecting frame and is used to drive the connecting frame to move along the cutting direction; the limiting unit and the adsorption unit are installed on the connecting frame; the cutting unit is sleeved outside the adsorption unit and is used to cut the heat dissipation paste; the adsorption unit is used to adsorb the cut heat dissipation paste after the cutting unit cuts the heat dissipation paste; the limiting unit is used to limit the cutting unit when the cutting unit cuts the heat dissipation paste.

[0007] The beneficial effects of this solution are as follows: When it is necessary to cut the whole piece of uncut heat dissipation paste, with the help of the operating table, first place the heat dissipation paste with the bottom film facing down and spread it flat on the operating table, and then manually peel off the release film on the surface of the heat dissipation paste. Align the cutting unit with the heat dissipation paste to be cut, the robotic arm drives the cutting and attaching mechanism to move to the cutting position, the driving unit drives the connecting frame to move downward along the cutting direction, drives the cutting unit to move downward, and cuts off the heat dissipation paste; then the adsorption unit adsorbs the cut heat dissipation paste, and the limiting unit limits the cutting unit; next, the driving unit drives the connecting frame to drive the cutting unit to move away from the heat dissipation paste along the cutting direction; then the robotic arm drives the cutting and attaching mechanism to move to the pasting position; the driving unit drives the connecting frame to drive the adsorption mechanism to paste the heat dissipation paste on the product, and finally the driving mechanism resets, the limiting unit resets, and the robotic arm drives the cutting and attaching mechanism to move to the next cutting position to complete a new round of operations.

[0008] Since the raw material used in this technical solution is uncut heat dissipation paste, secondary cutting and processing of the whole piece of heat dissipation paste will increase the processing procedures and processing costs. Therefore, this technical solution has the advantages of reducing processing procedures and saving costs; when facing the technical problem of "cutting heat dissipation paste", based on the prior art, a logical analysis and reasoning by those skilled in the art is "cut the heat dissipation paste and the release film into small pieces first, and then peel off the release film on each small piece of heat dissipation paste one by one", and this cognitive habit hinders the research and development in this field.

[0009] Since when cutting the heat dissipation paste, the whole piece of release film is peeled off the surface of the heat dissipation paste at one time, the working intensity is reduced, the working efficiency is improved, and at the same time the damage probability of the heat dissipation paste is reduced.

[0010] Further, the driving unit includes a support base, a slider, a support block, and a first driving member. The top of the support base is rotatably connected to the output end of the robotic arm. The first driving member is fixed to the side of the support base. The slider includes a first horizontal portion and a first vertical portion fixedly connected. The output shaft of the first driving member is fixedly connected to the first horizontal portion. The first vertical portion is fixedly connected to the support block. The connecting frame is fixedly connected to the support block.

[0011] Further, the limiting unit includes a second driving member and a limiting block. The second driving member is fixed to the connecting frame. The limiting block is fixed to the output shaft of the second driving member. The limiting block is used for limiting the cutting frame.

[0012] Further, the adsorption unit includes a suction cup, a suction cup base, and a suction device; the suction cup base is installed on the connecting frame and is provided with a first through hole for the suction cup to pass through. The suction cup passes through the first through hole and is communicated with the suction device.

[0013] Further, the cutting unit includes a cutting frame and a fixed seat. The cutting frame is arranged below the fixed seat; a second through hole is provided in the fixed seat. The fixed seat is sleeved on the suction cup through the second through hole. The fixed seat moves along the axial direction of the second through hole with respect to the suction cup; an elastic member is provided between the fixed seat and the suction cup base; when the cutting frame cuts the thermal paste, the elastic member is compressed, and the second driving member drives the limiting block to limit the cutting frame; when the thermal paste is completely pasted, the second driving member drives the limiting block to reset, and the elastic member releases elastic potential energy to reset the cutting frame.

[0014] Further, the limiting block includes a second horizontal portion and a second vertical portion fixedly connected. The second vertical portion is fixedly connected to the output shaft of the second driving member. A U-shaped groove is formed in the second horizontal portion. The second horizontal portion can limit the fixed seat.

[0015] The beneficial effect of this solution is that: the U-shaped groove divides the second horizontal portion into two parts, enabling the second horizontal portion to limit the fixed seat, making the cutting frame more stable and not prone to shaking. When the cutting frame is unstable, the shaking of the cutting frame will rub against the thermal paste adsorbed on the suction cup body, causing the thermal paste to easily fall off.

[0016] Further, the surface of the second horizontal portion in contact with the fixed seat has a rounded corner transition.

[0017] The beneficial effect of this solution is that: it prevents the second horizontal portion from scratching the fixed seat.

[0018] Further, the cross-section of the cutting frame is rectangular, and the cross-sectional area of the bottom is smaller than that of the top.

[0019] The beneficial effects of this solution are as follows: Compared with the cross-sectional areas of the bottom and the top of the cutting frame body being equal, when the cross-sectional areas of the bottom and the top are equal, when cutting the thermal paste, the bottom of the cutting frame border contacts the thermal paste surface. When the same pressure is applied, the pressure generated by the surface contact is relatively small, making the cutting surface of the thermal paste not smooth. However, when the cross-sectional area of the bottom of the cutting frame body is smaller than that of the top, the bottom of the cutting frame is inclined. When cutting the thermal paste, the border of the bottom of the cutting frame contacts the thermal paste in a line. Under the same pressure, the generated pressure is relatively large, making the cutting surface of the thermal paste relatively smooth and flat.

[0020] The present invention also provides a method for using an automatic thermal paste cutting and attaching device, which includes the following steps: S1: The robotic arm drives the cutting and attaching mechanism to move to the cutting position; S2: The driving unit in the cutting and attaching mechanism drives the connecting frame to drive the cutting unit to cut the thermal paste along the cutting direction; S3: The adsorption unit adsorbs the cut thermal paste; S4: The limiting unit limits the cutting unit; S5: The robotic arm drives the cutting and attaching mechanism to move to the pasting position; S6: The driving unit drives the connecting frame to drive the adsorption mechanism to paste the thermal paste onto the product; S7: The limiting unit and the driving unit are reset.

[0021] The beneficial effects of this solution are as follows: This solution can achieve the automatic cutting and pasting of thermal paste, improve work efficiency, save labor costs, and reduce the work intensity of workers. Description of the Drawings

[0022] Figure 1 It is a structural diagram of the thermal paste in the prior art;

[0023] Figure 2 It is a structural diagram of the automatic thermal paste cutting and attaching device in the embodiment;

[0024] Figure 3 It is a structural diagram of the cutting and attaching mechanism in the embodiment;

[0025] Figure 4 It is a front structural diagram when the limiting unit limits the cutting unit;

[0026] Figure 5 It is a side structural diagram when the limiting unit limits the cutting unit.

[0027] Reference numerals in the accompanying drawings of the specification: workbench 1, base 2, power member 3, mechanical connection shaft 4, support seat 5, flange 6, first driving member 7, first horizontal portion 8, first vertical portion 9, support block 10, fixing block 12, bottom plate 13, side plate 14, top plate 15, rectangular through hole 16, second U-shaped groove 17, suction cup base 18, cutting frame 19, fixing seat 21, semi-threaded bolt 22, elastic member 23, suction cup 24, suction device 25, second driving member 26, second horizontal portion 27, second vertical portion 28, first U-shaped groove 29, operation table 30, support frame 31, heat dissipation paste 32, release film 33, bottom film 34. Detailed implementation mode

[0028] The following is a further detailed description through specific implementation modes:

[0029] Embodiment 1

[0030] The present invention provides an automatic cutting and attaching device for heat dissipation paste. As Figures 2 - 5 shown, the device includes a robotic arm and a cutting and attaching mechanism; the robotic arm is connected to the cutting and attaching mechanism and is used to drive the cutting and attaching mechanism to move back and forth between a cutting position and an attaching position. Among them, the robotic arm is installed on the base 2 of the workbench 1. The robotic arm includes a power member 3 and a mechanical connection shaft 4, and the power member 3 is rotatably connected to one end of the mechanical connection shaft 4. Further, in order to increase the movement range of the robotic arm, a first servo motor is also installed at the other end of the mechanical connection shaft 4.

[0031] The cutting and attaching mechanism includes a connecting frame, a driving unit, a limiting unit, an adsorption unit, and a cutting unit.

[0032] Specifically, the connecting frame includes a fixing block 12, a bottom plate 13, side plates 14, and a top plate 15. The bottom plate 13 is fixedly connected to the bottom of the top plate 15 through two side plates 14. The fixing block 12 is fixed to the top plate 15, and bolt connection can be used; a rectangular through hole 16 is opened on the bottom plate 13 between the two side plates 14, and a second U-shaped groove 17 communicating with the rectangular through hole 16 is opened on the left side plate 14.

[0033] Specifically, the driving unit includes a support seat 5, a slider, a support block 10, and a first driving member 7. The output shaft of the first servo motor is bolted to the top of the support seat 5 through a flange 6, and the first driving member 7 is bolted to the side of the support seat 5. The first driving member 7 can be a cylinder. The slider is L-shaped and includes a first horizontal portion 8 and a first vertical portion 9 fixedly connected. The output shaft of the first driving member 7 is bolted to the first horizontal portion 8, and the first vertical portion 9 is bolted to the support block 10. The fixing block 12 is welded to the support block 10, so that the driving unit can drive the connecting frame to move.

[0034] The cutting unit includes a cutting frame 19, a fixed seat 21, and a half-threaded bolt 22. The cutting frame 19 is disposed below the fixed seat 21, and the fixed seat 21 and the cutting frame 19 are integrally formed. The limiting unit and the adsorption unit are installed on the connecting frame; the adsorption unit includes a suction cup 24 (the suction cup 24 is located within the cutting frame 19, Figure 3 not shown in the figure), a suction cup base 18, and a suction device 25; the suction cup base 18 is installed on the connecting frame, and is provided with a first through hole for the suction cup 24 to pass through. The suction cup 24 passes through the first through hole and is communicated with the suction device 25 through a pipeline. The fixed seat 21 is provided with a second through hole, and the fixed seat 21 is sleeved on the suction cup 24 through the second through hole, and the fixed seat 21 and the suction cup 24 move relative to each other along the axial direction of the second through hole.

[0035] The half-threaded bolt 22 sequentially passes through the fixed seat 21 and the suction cup base 18 to fix the suction cup base 18 on the bottom plate 13, and the fixed seat 21 is slidably connected to the half-threaded bolt 22. As Figure 5 shown, an elastic member 23 is provided between the fixed seat 21 and the suction cup base 18. The elastic member 23 is sleeved on the half-threaded bolt 22 between the fixed seat 21 and the suction cup base 18. In this embodiment, the elastic member 23 is a spring.

[0036] In this embodiment, the suction device 25 can be a device that can control air pressure, such as a negative pressure machine or a vacuum pump. The suction device 25 is installed on the bottom plate 13 above the suction cup base 18 through bolts, and the upper end of the suction cup 24 is communicated with the output end of the negative pressure machine through a pipeline.

[0037] The limiting unit includes a second driving member 26 and a limiting block. The second driving member 26 is connected to the connecting frame through bolts. The limiting block includes a second horizontal portion 27 and a second vertical portion 28 connected in sequence. The second vertical portion 28 is connected to the output shaft of the second driving member 26 through bolts. The lower end of the second vertical portion 28 penetrates through the rectangular through hole 16 and is located at the lower end of the bottom plate 13. The second horizontal portion 27 is located on the right side of the second vertical portion 28. A first U-shaped groove 29 is formed on the second horizontal portion 27. The second vertical portion 28 is slidably connected to the rectangular through hole 16. The position where the second horizontal portion 27 contacts the fixed seat 21 is chamfered. The second horizontal portion 27 can limit the fixed seat 21.

[0038] When the cutting frame 19 cuts the thermal paste 32, the elastic member 23 is compressed. The second driving member 26 drives the limiting block, so that the second horizontal portion 27 presses against the fixed seat 21 to limit the fixed seat 21 and the cutting frame 19; the suction device 25 works, and the suction cup 24 adsorbs the cut thermal paste 32. The robotic arm drives the cutting and attaching mechanism to the pasting position to complete pasting. When the thermal paste 32 is completely pasted, the second driving member 26 drives the limiting block to reset, releases the constraint of the second horizontal portion 27 on the fixed seat 21, and the elastic member 23 releases elastic potential energy to reset the cutting frame 19.

[0039] In this embodiment, the shape of the cross-section of the cutting frame 19 can be set according to the shape required by the thermal paste 32. Preferably, the cross-section of the cutting frame 19 is rectangular, and the cross-sectional area of the bottom of the cutting frame 19 is smaller than that of the upper part.

[0040] As Figure 2 shown, in this embodiment, a workbench 1 is further provided. A support frame 31 is welded on the workbench 1, and an operating table 30 is welded on the support frame 31. The operating table 30 is located below the cutting frame 19.

[0041] In the prior art, almost all the thermal paste 32 used in factory production is pre-processed. The supplier pre-cuts the thermal paste 32 into small pieces according to the specified size. During factory production, workers can directly tear off small pieces of the thermal paste 32 for attachment. Therefore, there will be problems such as low operation efficiency and high cost of the thermal paste 32, and the thermal paste 32 will be contaminated during manual attachment, resulting in abnormalities after the thermal paste 32 is pasted. In this embodiment, the unprocessed whole sheet of thermal paste 32 is directly used for cutting and attachment. There is a release film 33 on the surface of the thermal paste 32 and a bottom film 34 on the bottom surface. When it is necessary to cut the uncut and unprocessed whole sheet of thermal paste 32, with the help of the operating table, first place the thermal paste 32 with the bottom film 34 facing down on the operating table, and then manually peel off the release film 33 on the surface of the thermal paste 32. Align the cutting unit with the thermal paste 32 to be cut, and the robotic arm drives the cutting and attaching mechanism to move to the cutting position (both the cutting position and the pasting position in the following text are pre-set on the control computer); the driving unit drives the connecting frame to move downward along the cutting direction, driving the cutting unit to move downward to cut off the thermal paste 32; then the adsorption unit adsorbs the cut thermal paste 32, and the limiting unit limits the cutting unit; next, the driving unit drives the connecting frame to drive the cutting unit to move away from the thermal paste 32 along the cutting direction; then the robotic arm drives the cutting and attaching mechanism to move to the pasting position; the driving unit drives the connecting frame to drive the adsorption mechanism to paste the thermal paste 32 on the product. Finally, the driving mechanism resets, the limiting unit resets, and the robotic arm drives the cutting and attaching mechanism to move to the next cutting position to complete a new round of operations.

[0042] The raw material used in the technical solution of this embodiment is the uncut and unprocessed thermal paste 32. Therefore, this technical solution has the advantages of reducing processing procedures and saving costs. At the same time, since when cutting the thermal paste 32, the whole release film 33 is peeled off the surface of the thermal paste 32 at one time, the working intensity is reduced, the working efficiency is improved, the damage probability of the thermal paste 32 is reduced, and the pollution of the thermal paste 32 by manual operation is avoided.

[0043] Embodiment 2

[0044] This embodiment provides a method for using the above-mentioned automatic cutting and pasting device for heat dissipation paste. The structure of the device can be referred to the above embodiment and will not be elaborated here. The method includes the following steps:

[0045] S1: The robotic arm drives the cutting and pasting mechanism to move to the cutting position; in the embodiment, the cutting position refers to the position where the cutting and pasting mechanism is located when the heat dissipation paste 32 is automatically cut by the automatic cutting and pasting device for heat dissipation paste 32, and the pasting position refers to the position where the cutting and pasting mechanism is located when the heat dissipation paste 32 is pasted on the product.

[0046] S2: The driving unit in the cutting and pasting mechanism drives the connecting frame to drive the cutting unit to cut the heat dissipation paste 32 along the vertical cutting direction; in this embodiment, since the heat dissipation paste 32 is located on the operating table 30, the cutting unit will cut along the vertical direction. Further, referring to Embodiment 2, the fixed seat 21 in the cutting unit is integrally formed with the cutting frame 19, and a second through hole is provided therein. The suction cup 24 is placed in the second through hole, and the suction cup 24 and the cutting frame 19 and the fixed seat 21 form a piston structure. There is an elastic member 23 between the fixed seat 21 and the base 18 of the suction cup 24. When the cutting frame 19 cuts the heat dissipation paste 32, the elastic member 23 will be compressed, and at the same time, the suction cup 24 will gradually protrude.

[0047] S3: The adsorption unit adsorbs the cut heat dissipation paste 32; further, after the cutting frame 19 completes the cutting, the suction device 25 in the adsorption unit is activated to generate negative pressure, and the suction cup 24 adsorbs the cut heat dissipation paste 32.

[0048] S4: The limiting unit limits the cutting unit; further, as Figure 3 shown, after the cutting unit completes the cutting, the elastic member 23 is in a compressed state. At this time, the second driving member 26 in the limiting unit drives the limiting block to limit the fixed seat 21, preventing the elastic member 23 from releasing elastic potential energy to push the fixed seat 21 downward, causing the cutting frame 19 to submerge the heat dissipation paste 32, resulting in the inability to paste the heat dissipation paste 32 onto the product.

[0049] S5: The robotic arm drives the cutting and pasting mechanism to move to the pasting position;

[0050] S6: The driving unit drives the connecting frame to drive the adsorption mechanism to paste the heat dissipation paste 32 onto the product;

[0051] S7: The driving unit and the limiting unit are reset. Further, the first driving member 7 in the driving unit drives the connecting frame to return to the original position, the second driving member 26 in the limiting unit drives the limiting block to return to the original position, the elastic member 23 releases elastic potential energy, pushes the fixed seat 21 downward, and the fixed seat 21 is restricted by the threaded bolt 22, and the entire cutting unit also returns to the original position.

[0052] Embodiment 3

[0053] The present embodiment provides a method for using an automatic cutting and attaching device for heat dissipation paste, including the following steps:

[0054] Step 1: Instead of using the heat dissipation paste 32 as shown in Figure 1 , the present embodiment uses a whole sheet of uncut and unprocessed heat dissipation paste 32. When the heat dissipation paste 32 needs to be cut, first place the bottom film 34 of the heat dissipation paste 32 downward and lay it flat on the operation table 30, and then tear off the release film 33 on the surface of the heat dissipation paste 32 by hand;

[0055] Step 2: The robotic arm drives the cutting unit to rotate so that the position of the cutting frame 19 is aligned with the position where the heat dissipation paste 32 needs to be cut;

[0056] Step 3: Start the first driving member 7. The output shaft of the first driving member 7 extends, driving the slider to move downward. The movement of the slider drives the cutting frame 19 and the suction cup 24 to move downward. When the cutting frame 19 contacts the heat dissipation paste 32, the slider continues to move downward, driving the cutting frame 19 and the suction cup 24 to continue moving downward. The cutting frame 19 is resisted by the heat dissipation paste 32, causing the fixed seat 21 to compress the elastic member 23. The cutting frame 19 continues to move downward to cut off the heat dissipation paste 32;

[0057] Step 4: Due to the compression of the elastic member 23, the distance between the fixed seat 21 and the suction cup base 18 becomes smaller, causing the lower end of the suction cup 24 to gradually extend. Start the second driving member 26. The output shaft of the second driving member 26 extends, and the limiting block moves to the right, causing the second horizontal portion 27 to abut against the fixed seat 21 to limit the fixed seat 21;

[0058] Step 5: Start the suction device 25. The suction device 25 evacuates air, and the suction cup 24 adsorbs the cut heat dissipation paste 32 to the bottom of the suction cup 24, causing the heat dissipation paste 32 to peel off from the bottom film 34; The robotic arm transfers the cutting and attaching mechanism to the area where pasting is required, and pastes the heat dissipation paste 32 at the bottom of the suction cup 24 at the position where pasting is required; The suction device 25 releases the negative pressure.

[0059] Step 6: The output shaft of the second driving member 26 contracts, driving the limiting block to move to the left, releasing the constraint of the limiting block on the fixed seat 21, and then the heat dissipation paste 32 can be cut again.

[0060] The above are only the embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. An automatic cutting and attaching device for heat dissipation paste, characterized in that: It includes a robotic arm and a cutting and attaching mechanism; the robotic arm is connected to the cutting and attaching mechanism and is used to drive the cutting and attaching mechanism to move back and forth between the cutting position and the attaching position; the cutting and attaching mechanism includes a connecting frame, a driving unit, a limiting unit, a suction unit, and a cutting unit; The output end of the driving unit is connected to the connecting frame and is used to drive the connecting frame to move along the cutting direction; the limiting unit and the suction unit are installed on the connecting frame; The cutting unit is sleeved outside the suction unit and is used to cut the thermal paste; the suction unit is used to suck the cut thermal paste after the cutting unit cuts the thermal paste; the suction unit includes a suction cup, a suction cup base, and a suction device. The suction cup base is installed on the connecting frame and is provided with a first through hole for the suction cup to pass through. The suction cup passes through the first through hole and is communicated with the suction device; the cutting unit includes a cutting frame and a fixing seat. The cutting frame is arranged below the fixing seat. A second through hole is arranged in the fixing seat. The fixing seat is sleeved on the suction cup through the second through hole. The fixing seat moves along the axial direction of the second through hole between the suction cup; an elastic member is arranged between the fixing seat and the suction cup base; the limiting unit is used to limit the cutting unit when the cutting unit cuts the thermal paste. When the cutting frame cuts the thermal paste, the elastic member is compressed, and the limiting unit limits the cutting frame; when the thermal paste is completely pasted, the limiting unit releases the constraint on the cutting frame, and the elastic member releases elastic potential energy to reset the cutting frame; the limiting unit includes a second driving member and a limiting block. The second driving member is fixed on the connecting frame, and the limiting block is fixed on the output shaft of the second driving member. The limiting block is used to limit the cutting frame; the limiting block includes a second horizontal portion and a second vertical portion fixedly connected. The second vertical portion is fixedly connected to the output shaft of the second driving member. A U-shaped groove is formed in the second horizontal portion, and the second horizontal portion can limit the fixing seat.

2. The automatic cutting and attaching device for heat dissipation paste according to claim 1, characterized in that: The driving unit includes a support seat, a slider, a support block, and a first driving member. The top of the support seat is rotatably connected to the output end of the robotic arm. The first driving member is fixed on the side of the support seat. The slider includes a first horizontal portion and a first vertical portion fixedly connected. The output shaft of the first driving member is fixedly connected to the first horizontal portion, and the first vertical portion is fixedly connected to the support block. The connecting frame is fixedly connected to the support block.

3. The automatic cutting and attaching device for heat dissipation paste according to claim 2, characterized in that, The surface of the second horizontal portion in contact with the fixing seat has a rounded corner transition.

4. The heat dissipation paste automatic cutting and attaching device according to claim 3, characterized in that, The cross-section of the cutting frame is rectangular, and the cross-sectional area of the bottom is smaller than that of the top.

5. A method for using the automatic cutting and attaching device for heat dissipation paste according to any one of claims 1-4, characterized in that, It includes the following steps: S1: The robotic arm drives the cutting and attaching mechanism to move to the cutting position; S2: The driving unit in the cutting and attaching mechanism drives the connecting frame to drive the cutting unit to cut the thermal paste along the cutting direction; S3: The suction unit sucks the cut thermal paste; S4: The limiting unit limits the cutting unit; S5: The robotic arm drives the cutting and attaching mechanism to move to the pasting position; S6: The driving unit drives the connecting frame to drive the suction mechanism to paste the thermal paste on the product; S7: The limiting unit and the driving unit are reset.

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