CN115302560A - Automatic cutting and attaching device for heat dissipation paste and using method thereof - Google Patents

Abstract

The invention relates to the technical field of cutting and attaching devices, and discloses an automatic cutting and attaching device for a cooling paste and a using method of the automatic cutting and attaching device, wherein the device comprises a mechanical arm and a cutting and attaching mechanism; the mechanical arm is connected with the cutting and attaching mechanism and used for driving the cutting and attaching mechanism to move back and forth at the cutting position and the attaching position; the cutting and attaching mechanism comprises 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 with the connecting frame and used for driving the connecting frame to move along the cutting direction; the limiting unit and the adsorption unit are arranged on the connecting frame; the cutting unit is sleeved outside the adsorption unit and used for cutting the heat dissipation paste; the adsorption unit is used for adsorbing the cut radiating paste after the cutting unit cuts the radiating paste; the automatic cutting and attaching device for the cooling paste and the using method thereof can improve the processing efficiency, reduce the working strength and reduce the damage probability of the cooling paste.

Description

Automatic cutting and attaching device for heat-dissipating paste and using method thereof

Technical Field

The invention relates to the technical field of cutting and attaching devices, in particular to an automatic cutting and attaching device for cooling paste and a using method of the automatic cutting and attaching device.

Background

Thermal paste (also known as Thermal paste) is a paste-like material that conducts heat well (but is mostly non-conductive) and is typically used at the interface of a heat sink and a heat source (e.g., a high power semiconductor component). The main function of the thermal paste is to remove air or gaps (poor thermal conductivity of air) at the interface portion, so as to maximize the thermal conductivity.

In the production and manufacturing process of intelligent terminal products, the heat dissipation paste is used to help the heat dissipation of the devices. As shown in fig. 1, the heat dissipating paste 32 has a release film 33 bonded to the upper surface thereof and a base film 34 bonded to the lower surface thereof. In order to facilitate processing and use in a manufacturing factory, the conventional heat dissipating paste 32 is already subjected to preliminary processing when being supplied, the heat dissipating paste 32 is cut into small pieces, and when the heat dissipating paste is required to be used, an operator peels off the small pieces of release films 33 from the heat dissipating paste 32, peels off the heat dissipating paste 32 from the base film 34, and finally pastes the heat dissipating paste 32 at a position where the sticking position is required to be stuck.

Although the technical solution cuts the thermal grease 32 into small pieces, which is convenient for use, the technical solution has the following disadvantages: 1. when in use, the release film 33 cut into small pieces is manually stripped from the surface of the heat dissipation paste 32, so that the working strength is high and the working efficiency is low; 2. since the thermal paste 32 is easily damaged in the process of manually peeling the release film 33, material waste is caused, thereby increasing the cost; 3. after the thermal grease 32 is cut into small pieces, it is expensive to sell and the cost of the raw materials is high.

Disclosure of Invention

The invention aims to provide an automatic cutting and attaching device for heat dissipation paste and a using method thereof, so that the working efficiency is improved, the working strength is reduced, and meanwhile, the damage probability of the heat dissipation paste is reduced.

In order to achieve the purpose, the invention adopts the following technical scheme: the automatic cutting and attaching device for the thermal grease comprises a mechanical arm and a cutting and attaching mechanism; the mechanical arm is connected with the cutting and attaching mechanism and used for driving the cutting and attaching mechanism to move back and forth at the cutting position and the attaching position; the cutting and attaching mechanism comprises 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 with the connecting frame and used for driving the connecting frame to move along the cutting direction; the limiting unit and the adsorption unit are arranged on the connecting frame; the cutting unit is sleeved outside the adsorption unit and used for cutting the heat dissipation paste; the adsorption unit is used for adsorbing the cut heat dissipation paste after the cutting unit cuts the heat dissipation paste; the limiting unit is used for limiting the cutting unit when the cutting unit cuts the radiating paste.

The beneficial effect of this scheme does: when the whole piece of uncut thermal paste needs to be cut, with the help of an operation table, the bottom film of the thermal paste is firstly downward and is flatly laid on the operation table, and then the release film on the surface of the thermal paste is peeled off by hand. Aligning the cutting unit to the thermal grease to be cut, driving the cutting attachment mechanism to move to a cutting position by the mechanical arm, driving the connecting frame to move downwards along the cutting direction by the driving unit, driving the cutting unit to move downwards, and cutting the thermal grease; then the adsorption unit adsorbs the cut heat dissipation paste, and the limiting unit limits the cutting unit; then the driving unit drives the connecting frame to drive the cutting unit to move along the cutting direction away from the direction of the heat dissipation paste; then the mechanical arm drives the cutting and attaching mechanism to move to the attaching position; the driving unit drives the connecting frame to drive the adsorption mechanism to paste the heat dissipation paste on the product, finally the driving mechanism resets, the limiting unit resets, and the mechanical arm drives the cutting attachment mechanism to move to the next cutting position again to complete a new round of operation.

Because the raw materials used by the technical scheme are the heat-dissipating paste which is not cut, the processing procedures are increased and the processing cost is increased because the whole heat-dissipating paste is cut for the second time. Therefore, the technical scheme has the advantages of reducing processing procedures and saving cost; when the technical problem of cutting the thermal paste is faced, on the basis of the prior art, a person skilled in the art reasonably analyzes and reasons that the thermal paste and the release film are firstly cut into small pieces, and then the release film on each small piece of thermal paste is peeled off one by one, and the cognitive habit hinders the research and development of people in the field.

When the radiating paste is cut, the whole release film is peeled off the surface of the radiating paste at one time, so that the working strength is reduced, the working efficiency is improved, and the damage probability of the radiating paste is reduced.

Further, the drive unit comprises a supporting seat, a sliding block, a supporting block and a first driving piece, the top of the supporting seat is rotatably connected with the output end of the mechanical arm, the first driving piece is fixed on the side face of the supporting seat, the sliding block comprises a first horizontal portion and a first vertical portion which are fixedly connected, the output shaft of the first driving piece is fixedly connected with the first horizontal portion, the first vertical portion is fixedly connected with the supporting block, and the connecting frame is fixedly connected with the supporting block.

Furthermore, the limiting unit comprises a second driving piece and a limiting block, the second driving piece is fixed on the connecting frame, the limiting block is fixed on an output shaft of the second driving piece, and the limiting block is used for limiting the cutting frame.

Further, the adsorption unit comprises a sucker, a sucker base and a suction device; the sucking disc base is installed on the link, and it is equipped with the first through-hole that holds the sucking disc and pass through, and the sucking disc passes first through-hole and suction equipment intercommunication.

Furthermore, the cutting unit comprises a cutting frame and a fixed seat, and the cutting frame is arranged below the fixed seat; the fixed seat is internally provided with a second through hole, the fixed seat is sleeved on the sucker through the second through hole, and the fixed seat and the sucker move along the axial direction of the second through hole; an elastic part is arranged between the fixed seat and the sucker base; when the cutting frame cuts the heat dissipation paste, the elastic piece is compressed, and the second driving piece drives the limiting block to limit the cutting frame; after the heat-dissipating paste is pasted, the second driving piece drives the limiting block to reset, and the elastic piece releases elastic potential energy to reset the cutting frame.

Furthermore, the limiting block comprises a second horizontal part and a second vertical part which are fixedly connected, the second vertical part is fixedly connected with an output shaft of the second driving piece, a U-shaped groove is formed in the second horizontal part, and the second horizontal part can limit the fixing seat.

The beneficial effect of this scheme does: the U type groove is divided into two parts with the second horizontal part for the second horizontal part can be spacing to the fixing base, makes the cutting frame more stable, is difficult for rocking, and when the cutting frame was unstable, rocking of cutting frame can rub with absorbent heat dissipation cream on the sucking disc body, makes the heat dissipation cream drop easily.

Furthermore, the contact surface of the second horizontal part and the fixed seat is in round-off transition.

The beneficial effect of this scheme does: the second horizontal part is prevented from scratching the fixed seat.

Furthermore, the cross section of the cutting frame is rectangular, and the cross section area of the bottom is smaller than that of the top.

The beneficial effect of this scheme does: the cutting frame is characterized in that the cutting frame is in equal cross section area with the bottom of the cutting frame body and the upper portion, when the bottom of the cutting frame is equal to the cross section area of the upper portion, the bottom of the cutting frame is in surface contact with the cooling paste when the same pressure is applied, the pressure generated by surface contact is small, the cutting surface of the cooling paste is not smooth, however, when the cross section area of the bottom of the cutting frame body is smaller than the cross section area of the upper portion, the bottom of the cutting frame is obliquely arranged, when the cooling paste is cut, the frame of the bottom of the cutting frame is in line contact with the cooling paste, under the same pressure, the generated pressure is large, and the cutting surface of the cooling paste is smooth and flat.

The invention also provides a use method of the automatic cutting and attaching device for the cooling paste, which comprises the following steps: s1: the mechanical arm drives the cutting attachment mechanism to move to a cutting position; s2: a driving unit in the cutting and attaching mechanism drives the connecting frame to drive the cutting unit to cut the heat-dissipating paste along the cutting direction; s3: the adsorption unit adsorbs the cut heat dissipation paste; s4, limiting the cutting unit by the limiting unit; s5: the mechanical arm drives the cutting and attaching mechanism to move to the attaching position; s6: the driving unit drives the connecting frame to drive the adsorption mechanism to paste the heat-dissipating paste on the product; s7: the limiting unit and the driving unit reset.

The beneficial effect of this scheme does: the scheme can realize automatic cutting and pasting of the heat dissipation paste, improves the working efficiency, saves the labor cost and reduces the working strength of workers.

Drawings

FIG. 1 is a block diagram of a prior art thermal grease;

FIG. 2 is a schematic diagram of an automatic thermal grease cutting and attaching apparatus;

FIG. 3 is a block diagram of an embodiment of a cutting and attaching mechanism;

FIG. 4 is a front structural view of the cutting unit when the limiting unit limits the cutting unit;

fig. 5 is a side structural view of the cutting unit when the limiting unit limits the cutting unit.

Reference numbers in the drawings accompanying this specification: the device comprises a workbench 1, a base 2, a power part 3, a mechanical connecting shaft 4, a supporting seat 5, a flange 6, a first driving part 7, a first horizontal part 8, a first vertical part 9, a supporting block 10, a fixing block 12, a bottom plate 13, a side plate 14, a top plate 15, a rectangular through hole 16, a second U-shaped groove 17, a sucker base 18, a cutting frame 19, a fixing seat 21, a half-thread bolt 22, an elastic part 23, a sucker 24, a suction device 25, a second driving part 26, a second horizontal part 27, a second vertical part 28, a first U-shaped groove 29, an operating platform 30, a supporting frame 31, heat dissipation paste 32, a release film 33 and a bottom film 34.

Detailed Description

The following is further detailed by way of specific embodiments:

example 1

The invention provides an automatic cutting and attaching device for a cooling paste, which comprises a mechanical arm and a cutting and attaching mechanism, as shown in figures 2-5; the mechanical arm is connected with the cutting attaching mechanism and used for driving the cutting attaching mechanism to move back and forth at the cutting position and the attaching position. The mechanical arm is arranged on a base 2 of the workbench 1 and comprises a power part 3 and a mechanical connecting shaft 4, and the power part 3 is rotatably connected with one end of the mechanical connecting shaft 4. Further, in order to increase the range of motion of the mechanical arm, a first servo motor is further mounted at the other end of the mechanical connection shaft 4.

The cutting attaching mechanism comprises a connecting frame, a driving unit, a limiting unit, an adsorption unit and a cutting unit.

Specifically, the connecting frame comprises a fixed block 12, a bottom plate 13, side plates 14 and a top plate 15, wherein the bottom plate 13 is fixedly connected with the bottom of the top plate 15 through the two side plates 14, and the fixed block 12 is fixed with the top plate 15 and can be connected by bolts; a rectangular through hole 16 is formed on the bottom plate 13 between the two side plates 14, and a second U-shaped groove 17 communicated with the rectangular through hole 16 is formed on the left side plate 14.

Specifically, the driving unit comprises a supporting seat 5, a sliding block, a supporting block 10 and a first driving piece 7, an output shaft of the first servo motor is connected with the top of the supporting seat 5 through a flange 6 through a bolt, the first driving piece 7 is connected with the side face of the supporting seat 5 through a bolt, and the first driving piece 7 can be an air cylinder. The sliding block is L-shaped and comprises a first horizontal portion 8 and a first vertical portion 9 which are fixedly connected, an output shaft of the first driving piece 7 is in bolted connection with the first horizontal portion 8, the first vertical portion 9 is in bolted connection with the supporting block 10, and the fixing block 12 is welded with the supporting block 10, so that the driving unit can drive the connecting frame to move.

The cutting unit includes cutting frame 19, fixing base 21 and half-thread bolt 22, and fixing base 21 below is located to cutting frame 19, and fixing base 21 and cutting frame 19 integrated into one piece. The limiting unit and the adsorption unit are arranged on the connecting frame; the suction unit includes a suction cup 24 (the suction cup 24 is located inside the cutting frame 19, not shown in fig. 3), a suction cup base 18, and a suction device 25; the suction cup base 18 is mounted on the connecting frame and is provided with a first through hole for accommodating the suction cup 24 to pass through, and the suction cup 24 passes through the first through hole and is communicated with the suction device 25 through a pipeline. The second through hole is arranged in the fixed seat 21, the fixed seat 21 is sleeved on the sucking disc 24 through the second through hole, and the fixed seat 21 and the sucking disc 24 move relatively along the axial direction of the second through hole.

The half-thread bolt 22 sequentially penetrates through the fixed seat 21 and the sucker base 18 to fix the sucker base 18 on the bottom plate 13, and the fixed seat 21 is connected with the half-thread bolt 22 in a sliding mode. As shown in fig. 5, an elastic member 23 is disposed between the fixing base 21 and the suction cup base 18, the elastic member 23 is sleeved on the half-threaded bolt 22 between the fixing base 21 and the suction cup base 18, and in this embodiment, the elastic member 23 is a spring.

In this embodiment, the suction device 25 may be a negative pressure machine, a vacuum pump, or the like that can control the air pressure. The suction device 25 is mounted on the bottom plate 13 at the upper part of 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.

The limiting unit comprises a second driving piece 26 and a limiting block, the second driving piece 26 is connected to the connecting frame through a bolt, the limiting block comprises a second horizontal portion 27 and a second vertical portion 28 which are connected in sequence, the second vertical portion 28 is connected with an output shaft of the second driving piece 26 through a bolt, 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 in the second horizontal portion 27, the second vertical portion 28 is connected with the rectangular through hole 16 in a sliding mode, the position, in contact with the fixing seat 21, of the second horizontal portion 27 is in fillet transition, and the second horizontal portion 27 can limit the fixing seat 21.

When the cutting frame 19 cuts the thermal grease 32, the elastic member 23 is compressed, and the second driving member 26 drives the limiting block, so that the second horizontal portion 27 abuts against the fixed seat 21, and the fixed seat 21 and the cutting frame 19 are limited; the suction device 25 is operated, and the suction cup 24 sucks the cut thermal grease 32. The mechanical arm drives the cutting and attaching mechanism to attach to the attaching position. After the thermal grease 32 is pasted, the second driving member 26 drives the limiting block to reset, the constraint of the second horizontal portion 27 on the fixing seat 21 is released, and the elastic member 23 releases the elastic potential energy to reset the cutting frame 19.

In this embodiment, the shape of the cross section of the cutting frame 19 can be set according to the shape of the thermal grease 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.

As shown in fig. 2, the cutting machine is further provided with a worktable 1, a supporting frame 31 is welded on the worktable 1, an operating table 30 is welded on the supporting frame 31, and the operating table 30 is located below the cutting frame 19.

In the prior art, the thermal grease 32 used in factory production is almost processed, the supplier cuts the thermal grease 32 into small pieces according to the specified size, and during factory production, workers directly tear the small pieces of thermal grease 32 to attach. Therefore, there are problems that the work efficiency is low and the cost of the thermal paste 32 is high, and the thermal paste 32 is contaminated when manually attached, resulting in an abnormality after the thermal paste 32 is attached. In this embodiment, the whole unprocessed thermal paste 32 is directly used for cutting and attaching, the surface of the thermal paste 32 has a release film 33, and the bottom surface has a bottom film 34. When the whole piece of the thermal paste 32 which is not cut is required to be cut, the bottom film 34 of the thermal paste 32 is first laid on the operation table with the operation table facing downward, and then the release film 33 on the surface of the thermal paste 32 is peeled off by hand. Aligning the cutting unit to the thermal grease 32 to be cut, and driving the cutting and attaching mechanism to move to a cutting position by the mechanical arm (the cutting position and the sticking position in the following text are preset on the control computer); the driving unit drives the connecting frame to move downwards along the cutting direction, so as to drive the cutting unit to move downwards and cut the thermal grease 32; then the adsorption unit adsorbs the cut thermal grease 32, and the limiting unit limits the cutting unit; then the driving unit drives the connecting frame to drive the cutting unit to move along the cutting direction away from the direction of the heat dissipation paste 32; then the mechanical arm drives the cutting and attaching mechanism to move to the attaching position; the driving unit drives the connecting frame to drive the adsorption mechanism to paste the heat dissipation paste 32 on the product, finally the driving mechanism resets, the limiting unit resets, and the mechanical arm drives the cutting attachment mechanism to move to the next cutting position again to complete a new round of operation.

The raw material used in the technical scheme in the embodiment is the thermal grease 32 which is not cut, so that the technical scheme has the advantages of reducing processing procedures and saving cost. Meanwhile, when the thermal paste 32 is cut, the whole release film 33 is peeled off the surface of the thermal paste 32 at one time, so that the working strength is reduced, the working efficiency is improved, the damage probability of the thermal paste 32 is reduced, and the thermal paste 32 is prevented from being polluted by manual operation.

Example 2

The embodiment provides a use method of the automatic cutting and attaching device based on the heat dissipation paste, the structure of the device can refer to the embodiment, and details are not repeated here, and the method comprises the following steps:

s1: the mechanical arm drives the cutting attachment mechanism to move to a cutting position; in the embodiment, the cutting position refers to a position of the cutting and attaching mechanism when the automatic material cutting and attaching device for the thermal paste 32 cuts the thermal paste 32, and the attaching position refers to a position of the cutting and attaching mechanism when the thermal paste 32 is attached to a product.

S2: the driving unit in the cutting and attaching mechanism drives the connecting frame to drive the cutting unit to cut the thermal grease 32 along the vertical cutting direction; in this embodiment, since the thermal paste 32 is located on the operation table 30, the cutting unit will cut in a vertical direction. Further, referring to embodiment 2, the fixing seat 21 of the cutting unit is integrally formed with the cutting frame 19, wherein a second through hole is formed, the suction cup 24 is disposed in the second through hole, and the suction cup 24, the cutting frame 19 and the fixing seat 21 form a piston structure. The elastic piece 23 is arranged between the fixed seat 21 and the base 18 of the sucking disc 24, and when the cutting frame 19 cuts the heat dissipation paste 32, the elastic piece 23 is pressed, and meanwhile, the sucking disc 24 gradually emerges.

S3: the adsorption unit adsorbs the cut thermal grease 32; further, after the cutting frame 19 finishes cutting, the suction device 25 in the suction unit is started to generate negative pressure, and the suction cup 24 sucks the cut thermal grease 32.

S4: the limiting unit limits the cutting unit; further, as shown in fig. 3, after the cutting unit finishes cutting, the elastic element 23 is in a compressed state, and at this time, the second driving element 26 in the limiting unit drives the limiting block to limit the fixing seat 21, so as to prevent the elastic element 23 from releasing elastic potential energy to push the fixing seat 21 downward, so that the cutting frame 19 does not cover the heat dissipation paste 32, and the heat dissipation paste 32 cannot be pasted on the product.

S5: the mechanical arm drives the cutting and attaching mechanism to move to the attaching position;

s6: the driving unit drives the connecting frame to drive the adsorption mechanism to paste the heat dissipation paste 32 on the product;

s7: the driving unit and the limiting unit 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 to push the fixing seat 21 downwards, the fixing seat 21 is limited by the threaded bolt 22, and the whole cutting unit also returns to the original position.

Example 3

The embodiment provides a using method of an automatic cutting and attaching device for cooling paste, which comprises the following steps:

the method comprises the following steps: in this embodiment, the thermal paste 32 shown in fig. 1 is not used, but the entire thermal paste 32 is used without being cut. When the thermal paste 32 needs to be cut, the base film 34 of the thermal paste 32 is firstly downward and laid on the operation table 30, and then the release film 33 on the surface of the thermal paste 32 is torn off by hand;

step two: the mechanical arm drives the cutting unit to rotate, so that the position of the cutting frame 19 is aligned with the position of the thermal grease 32 to be cut;

step three: when the first driving part 7 is started, the extension of the output shaft of the first driving part 7 drives the sliding block to move downwards, and the movement of the sliding block drives the cutting frame 19 and the sucking disc 24 to move downwards. When the cutting frame 19 contacts with the thermal grease 32, the slider continues to move downwards to drive the cutting frame 19 and the suction cup 24 to continue to move downwards, and the cutting frame 19 is subjected to the resistance of the thermal grease 32, so that the fixing seat 21 compresses the elastic element 23, and the cutting frame 19 continues to move downwards to cut off the thermal grease 32;

step four: because the compression of elastic component 23 for the interval between fixing base 21 and the sucking disc base 18 diminishes, makes the lower extreme of sucking disc 24 stretch out gradually, starts second driving piece 26, the extension of the output shaft of second driving piece 26, and the stopper moves to the right, makes second horizontal part 27 support fixing base 21, and is spacing to fixing base 21;

step five: starting the suction device 25, sucking air by the suction device 25, and adsorbing the cut thermal grease 32 at the bottom of the suction cup 24 by the suction cup 24, so that the thermal grease 32 is peeled off from the bottom film 34; the mechanical arm transfers the cutting and attaching mechanism to an area needing to be attached, and attaches the heat dissipation paste 32 at the bottom of the suction cup 24 to a position needing to be attached; the suction device 25 releases the negative pressure.

Step six: the output shaft of the second driving member 26 contracts to drive the limiting block to move leftwards, so that the limiting block can release the constraint of the fixing base 21, and the thermal grease 32 can be cut again.

The above are merely examples of the present invention and common general knowledge of known specific technical solutions and/or characteristics in the solutions has not been described herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, and these should also be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (9)

1. Attached device of automatic blank of cooling paste, its characterized in that: comprises a mechanical arm and a cutting and attaching mechanism; the mechanical arm is connected with the cutting and attaching mechanism and used for driving the cutting and attaching mechanism to move back and forth at the cutting position and the attaching position; the cutting and attaching mechanism comprises 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 with the connecting frame and used for driving the connecting frame to move along the cutting direction; the limiting unit and the adsorption unit are arranged on the connecting frame; the cutting unit is sleeved outside the adsorption unit and used for cutting the heat dissipation paste; the adsorption unit is used for adsorbing the cut heat dissipation paste after the cutting unit cuts the heat dissipation paste; the limiting unit is used for limiting the cutting unit when the cutting unit cuts the heat dissipation paste.

2. The automatic thermal grease cutting and attaching device according to claim 1, characterized in that: the driving unit comprises a supporting seat, a sliding block, a supporting block and a first driving piece, the top of the supporting seat is rotatably connected with the output end of the mechanical arm, the first driving piece is fixed on the side face of the supporting seat, the sliding block comprises a first horizontal portion and a first vertical portion which are fixedly connected, the output shaft of the first driving piece is fixedly connected with the first horizontal portion, the first vertical portion is fixedly connected with the supporting block, and the connecting frame is fixedly connected with the supporting block.

3. The automatic cutting and attaching device for thermal grease according to claim 2, wherein the limiting unit comprises a second driving member and a limiting block, the second driving member is fixed on the connecting frame, the limiting block is fixed on an output shaft of the second driving member, and the limiting block is used for limiting the cutting frame.

4. The automatic thermal grease cutting and attaching device according to claim 3, wherein the suction unit comprises a suction cup, a suction cup base and a suction device; the sucking disc base is installed on the link, and it is equipped with the first through-hole that holds the sucking disc and pass through, and the sucking disc passes first through-hole and suction equipment intercommunication.

5. The automatic thermal grease cutting and attaching device according to claim 4, wherein the cutting unit includes a cutting frame and a holder, the cutting frame being disposed below the holder; the fixed seat is internally provided with a second through hole, the fixed seat is sleeved on the sucker through the second through hole, and the fixed seat and the sucker move along the axial direction of the second through hole;

an elastic part is arranged between the fixed seat and the sucker base; when the cutting frame cuts the heat dissipation paste, the elastic piece is compressed, and the second driving piece drives the limiting block to limit the cutting frame; after the heat-dissipating paste is pasted, the second driving piece drives the limiting block to reset, and the elastic piece releases elastic potential energy to reset the cutting frame.

6. The automatic thermal grease cutting and attaching device as claimed in claim 5, wherein the limiting block comprises a second horizontal portion and a second vertical portion, the second horizontal portion and the second vertical portion are fixedly connected, the second vertical portion is fixedly connected with an output shaft of the second driving member, the second horizontal portion is provided with a U-shaped groove, and the second horizontal portion can limit the fixing seat.

7. The automatic thermal grease cutting and attaching device according to claim 6, wherein the surface of the second horizontal portion which contacts the fixed base is rounded.

8. The automatic thermal grease cutting and applying device according to claim 7, wherein the cutting frame has a rectangular cross-section, and the cross-sectional area of the bottom is smaller than that of the top.

9. A method for using the thermal grease automatic cutting and attaching device according to any one of claims 1-9, comprising the steps of:

s1: the mechanical arm drives the cutting attachment mechanism to move to a cutting position;

s2: a driving unit in the cutting and attaching mechanism drives the connecting frame to drive the cutting unit to cut the heat-dissipating paste along the cutting direction;

s3: the adsorption unit adsorbs the cut heat dissipation paste;

s4: the limiting unit limits the cutting unit;

s5: the mechanical arm drives the cutting and attaching mechanism to move to the attaching position;

s6: the driving unit drives the connecting frame to drive the adsorption mechanism to paste the heat dissipation paste on the product;

s7: the limiting unit and the driving unit reset.

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