Processing method of 3D-VC radiator capable of realizing mass production

Abstract

The invention discloses a processing method of a 3D-VC radiator capable of realizing mass production, which reduces the manufacturing procedures of the whole radiator, is short in processing period and high in processing yield, and meets the demand of mass production. After all the heat pipes and the cover plate are positioned and installed through the rear mold, the head end parts of the heat pipes protrude upwards, then the connecting parts of the cover plate and the heat pipes are heated through heat conduction, the front mold is driven to press downwards, and downward-protruding reaming heads are arranged at the positions, corresponding to the heads of the heat pipes, of the front mold. Under the action of high temperature and high pressure, the downward-protruding reaming head enables the head end of the heat pipe to be reamed and then to be tightly connected to the surface of the cover plate, and then a combination of the cover plate and the heat pipe is taken down for follow-up assembly work of the 3D-VC radiator.

Description

Technical Field

[0001] The present invention relates to the technical field of radiator structures, and in particular to a processing method for a 3D-VC radiator that can be mass-produced. Background Art

[0002] High temperature can have an adverse effect on the performance and reliability of electronic products, and even cause thermal failure problems, thereby causing the failure of the entire electronic product. Relevant studies have shown that the failure rate of electronic components increases exponentially with the increase of operating temperature. Heat dissipation has become one of the core factors restricting the development of high-end electronic devices. In the heat dissipation module of the existing technology, the heat pipe and the VC temperature plate adopt a separate design. Because the thermal resistance value increases with the lengthening of the heat conduction distance, the heat dissipation effect is not satisfactory. The 3D-VC radiator extends the heat pipe into the body of the VC heat spreader. When the vacuum cavity of the VC heat spreader is connected to the heat pipe and the internal working fluid is connected, the 3D-VC radiator and the heat source are in direct contact. Its vertical heat pipe design also improves the heat transfer rate. Therefore, the demand for 3D-VC radiators is increasing day by day. However, the existing processing method pre-processes and manufactures a fixed-length heat pipe, then expands or upsets the head end of the heat pipe, and then the heat pipe is inserted into the positioning hole of the cover plate, and then diffusion welding is performed. This makes the processing technology of the heat pipe and cover plate assembly of the entire 3D-VC radiator complicated, and due to the large number of processing processes, the processing yield is reduced. Summary of the invention

[0003] In view of the above problems, the present invention provides a processing method for a 3D-VC heat sink that can be mass-produced, which reduces the entire manufacturing process of the heat sink, has a short processing cycle, and a high processing yield, thus meeting the needs of mass production.

[0004] A processing method for a mass-producible 3D-VC radiator, characterized in that: after all heat pipes and cover plates are positioned and installed by a rear mold, the head end portion of the heat pipe is convex, and then the connecting portion of the cover plate and the heat pipe is heated by heat conduction, and the front mold is driven to press downward. The front mold is provided with a downward convex reaming head corresponding to the head position of each heat pipe. Under the action of high temperature and high pressure, the downward convex reaming head makes the head end of the heat pipe tightly connected to the surface of the cover plate after reaming, and then the combination of the cover plate and the heat pipe is removed for subsequent assembly operations of the 3D-VC radiator.

[0005] It is further characterized in that it comprises the following steps:

[0006] S1. Pre-fabricate a front mold assembly and a rear mold assembly according to the design parameters of the 3D-VC heat sink. The front mold assembly includes a front mold body and a plurality of downward convex hole expansion heads. The rear mold assembly includes a rear mold body and a plurality of independent tube holes.

[0007] S2. Pre-process several heat pipes and corresponding cover plates. The tail end of each heat pipe is a shrinkage hole structure, and the head end of each heat pipe is a straight pipe;

[0008] S3, transferring and placing the cover plate on the upper surface of the rear mold, and then inserting the heat pipes into the heat pipe positioning holes of the cover plate, and the tail end of each heat pipe is limitedly supported at the bottom of the independent pipe hole, so that the head end of the heat pipe is convex;

[0009] S4, the heat is quickly transferred to the rear mold by heat conduction through the external heating module, and the rear mold quickly transfers the heat energy to the cover plate and the heat pipe by heat conduction, so that the temperature of the cover plate and the heat pipe quickly rises to 620°C to 680°C;

[0010] S5, the front mold is pressed downward, so that the downward convex reaming head applies pressure to the upward convex part of the heat pipe, and the contact area between the reaming head end of the heat pipe and the cover plate is increased, so that the heat pipe is attached to the surface of the cover plate;

[0011] S6. After the front mold is pressurized for 3S to 5S, the front mold is reset, and the heat pipe and the cover body are formed into an integrated part. Then, the integrated part is removed from the rear mold for subsequent assembly of the 3D-VC heat sink.

[0012] It is further characterized by:

[0013] In step S5, the pressure of the front mold pressing down is 800-1050N;

[0014] The front mold assembly and the rear mold assembly are both an integrated structure made of hot-formed steel, and their deformation temperature is greater than the deformation temperature of the heat pipe and the cover body;

[0015] The downward convex hole-expanding head of the front mold assembly and the independent pipeline at the corresponding position are coaxially arranged to ensure that the outer walls of the expanded holes around the heat pipe after expansion are evenly and reliably fitted to the surface of the cover body.

[0016] After adopting the technology of the present invention, the heat pipe does not need to be expanded or upset. The heat pipe is directly positioned and installed on the cover plate, the heat pipe positioning hole aligned with the rear mold, and the independent pipeline is arranged. Then, the heat pipe and the cover plate are made active by high temperature. The front mold is pressed down to expand the convex part of the heat pipe through the downward convex expansion head and then directly pressed onto the cover plate. The expanded part is reliably integrated with the cover plate under high temperature and high pressure to form an integrated structure. The original three steps are reduced to two steps, so that the heat pipe expansion and the connection of the heat pipe and the cover plate are completed in one step, reducing the entire radiator production process, and the processing cycle is short and the processing yield is high, meeting the needs of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is applicable to the operation schematic diagram of the processing method of the present invention;

[0018] Figure 2It is an exploded view of the assembly of the mold mechanism, heat pipe and cover plate applicable to the present invention;

[0019] The names corresponding to the serial numbers in the figure are as follows:

[0020] Heat pipe 10 , shrinkage hole structure 11 , cover plate 20 , heat pipe positioning hole 21 , downward convex hole expansion head 31 , front mold body 30 , rear mold body 40 , independent pipe hole 41 , bottom contour surface 411 , external heating module 50 . DETAILED DESCRIPTION

[0021] A processing method for 3D-VC heat sink that can be mass-produced, see Figure 1-Figure 2 After all the heat pipes 10 and the cover plate 20 are positioned and installed by the rear mold, the head end of the heat pipe 10 is convex, and then the connection part of the cover plate 20 and the heat pipe 10 is heated by heat conduction, and the front mold is driven to press down. The front mold is provided with a downward convex reaming head 31 corresponding to the head position of each heat pipe 10. Under the action of high temperature and high pressure, the downward convex reaming head 31 makes the head end of the heat pipe 10 tightly connected to the surface of the cover plate 20 after reaming. Then, the combination of the cover plate 20 and the heat pipe 10 is removed for subsequent assembly of the 3D-VC radiator.

[0022] In specific implementation, it includes the following steps: S1, pre-making a front mold assembly and a rear mold assembly according to the design parameters of the 3D-VC heat sink, the front mold assembly includes a front mold body 30 and a plurality of downward convex hole expansion heads 31, and the rear mold assembly includes a rear mold body 40 and a plurality of independent tube holes 41;

[0023] S2, pre-processing a number of heat pipes 10 and corresponding cover plates 20, wherein the tail end of each heat pipe 10 is a shrinkage structure 11, and the head end of each heat pipe 10 is a straight pipe;

[0024] S3, the cover plate 20 is transferred and placed on the upper surface of the rear mold body 40, and then the heat pipes 10 are inserted into the heat pipe positioning holes 21 of the cover plate 20, and the tail end of each heat pipe 10 is limitedly supported on the bottom contour surface 411 of the independent pipe hole 41, so that the head end of the heat pipe 10 is convex;

[0025] S4, the external heating module 50 quickly transfers heat to the rear mold body 40 through heat conduction, and the rear mold body 40 quickly transfers heat energy to the cover plate 20 and the heat pipe 10 through heat conduction, so that the temperature of the cover plate 20 and the heat pipe 10 rises from room temperature to 650° C. within 1 minute;

[0026] S5, the front mold body 30 is pressed downward, so that the downward convex reaming head 31 applies pressure on the upward convex part of the heat pipe 10, and the downward pressure is 800-1050N, so that the contact area between the head end reaming of the heat pipe 10 and the cover plate 20 is increased, so that the heat pipe is attached to the surface of the cover plate 20;

[0027] S6. After the downward convex reaming head 31 is kept under pressure for 4 seconds, the front mold is reset, and the heat pipe 10 and the cover body 20 are formed into an integrated part. After that, the integrated part is removed from the rear mold for subsequent assembly of the 3D-VC heat sink.

[0028] In specific implementation: the front mold assembly and the rear mold assembly are both an integrated structure made of hot-formed steel, and their deformation temperature is greater than the deformation temperature of the heat pipe 10 and the cover body 20;

[0029] The downwardly convex reaming head 31 of the front mold assembly and the independent pipeline 41 at the corresponding position are coaxially arranged to ensure that the outer walls of the expanded holes around the heat pipe 10 are evenly and reliably fitted to the surface of the cover body 20 after expansion.

[0030] Its working principle is as follows: the heat pipe does not need to be expanded or upset, the heat pipe is directly positioned and installed on the cover plate, the heat pipe positioning hole aligned with the rear mold, and the independent pipeline layout. Then, the heat pipe and the cover plate are made active through high temperature, and the front mold is pressed down to expand the convex part of the heat pipe through the downward convex reaming head and then directly pressed onto the cover plate. The expanded part is reliably integrated with the cover plate under high temperature and high pressure to form an integrated structure, which reduces the original three steps to two steps.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for processing a mass-producible 3D-VC heat sink, characterized in that: After all the heat pipes and cover plates are positioned and installed through the rear mold, the head end of the heat pipe is convex, and then the connecting part of the cover plate and the heat pipe is heated by heat conduction, driving the front mold to press down. The front mold is provided with a convex reaming head corresponding to the head position of each heat pipe. Under the action of high temperature and high pressure, the convex reaming head makes the head end of the heat pipe tightly connected to the surface of the cover plate after expansion, and then the combination of the cover plate and the heat pipe is removed for subsequent assembly of the 3D-VC radiator.

2. The method for processing a mass-producible 3D-VC heat sink according to claim 1, characterized in that: It includes the following steps: S1. Pre-fabricate a front mold assembly and a rear mold assembly according to the design parameters of the 3D-VC heat sink. The front mold assembly includes a front mold body and a plurality of downward convex hole expansion heads. The rear mold assembly includes a rear mold body and a plurality of independent tube holes. S2. Pre-process several heat pipes and corresponding cover plates. The tail end of each heat pipe is a shrinkage hole structure, and the head end of each heat pipe is a straight pipe; S3, transferring and placing the cover plate on the upper surface of the rear mold, and then inserting the heat pipes into the heat pipe positioning holes of the cover plate, and the tail end of each heat pipe is limitedly supported at the bottom of the independent pipe hole, so that the head end of the heat pipe is convex; S4, the heat is quickly transferred to the rear mold by heat conduction through the external heating module, and the rear mold quickly transfers the heat energy to the cover plate and the heat pipe by heat conduction, so that the temperature of the cover plate and the heat pipe quickly rises to 620°C to 680°C; S5, the front mold is pressed downward, so that the downward convex reaming head applies pressure to the upward convex part of the heat pipe, and the contact area between the reaming head end of the heat pipe and the cover plate is increased, so that the heat pipe is attached to the surface of the cover plate; S6. After the front mold is pressurized for 3S to 5S, the front mold is reset, and the heat pipe and the cover body are formed into an integrated part. Then, the integrated part is removed from the rear mold for subsequent assembly of the 3D-VC heat sink.

3. The method for processing a mass-producible 3D-VC heat sink according to claim 2, characterized in that: In step S5, the pressure of the front mold pressing down is 800-1050N.

4. The method for processing a mass-producible 3D-VC heat sink according to claim 2, characterized in that: The front mold assembly and the rear mold assembly are both integral structures made of hot-formed steel, and their deformation temperatures are greater than the deformation temperatures of the heat pipe and the cover body.

5. The method for processing a mass-producible 3D-VC heat sink according to claim 2, characterized in that: The downward convex hole-expanding head of the front mold assembly and the independent pipeline at the corresponding position are coaxially arranged to ensure that the outer walls of the expanded holes around the heat pipe after expansion are evenly and reliably fitted to the surface of the cover body.

Images