CN111843394A - Groove type ultrathin aluminum-based soaking plate and preparation method thereof - Google Patents
Groove type ultrathin aluminum-based soaking plate and preparation method thereof Download PDFInfo
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- CN111843394A CN111843394A CN202010760303.9A CN202010760303A CN111843394A CN 111843394 A CN111843394 A CN 111843394A CN 202010760303 A CN202010760303 A CN 202010760303A CN 111843394 A CN111843394 A CN 111843394A
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- shell plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
Abstract
The invention discloses a groove type ultrathin aluminum-based soaking plate and a preparation method thereof, wherein the soaking plate comprises an upper shell plate, a lower shell plate and a filling pipe, the middle part of the upper shell plate and the middle part of the lower shell plate are respectively sunken to form a cavity and a flange positioned around the cavity, the surface of the cavity is provided with a staggered micro-groove structure and a plurality of support columns, the edge of the upper shell plate is concavely provided with a pipe orifice which is communicated with the cavity, the filling pipe is arranged at the pipe orifice, the flange of the upper shell plate and the flange of the lower shell plate are jointed and hermetically connected, the support columns of the upper shell plate are connected with the support columns of the lower shell plate, a liquid working medium is filled in the cavity through the filling pipe, and. Compared with a copper-based soaking plate, the groove-type ultrathin aluminum-based soaking plate has the characteristics of light weight, high thermal conductivity, wide material source, low cost and the like. Meanwhile, the space occupancy rate of the ultrathin aluminum-based soaking plate is extremely low, and the requirements of integration and miniaturization of the current electronic products can be well met.
Description
Technical Field
The invention relates to the technical field of heat dissipation of integrated electronic devices, in particular to a groove type ultrathin aluminum-based vapor chamber and a preparation method thereof.
Background
With the rapid development of high-power and high-integration electronic device technology, the heat dissipation problem of the electronic device is more and more concerned by related technicians. The heat dissipation capability of the electronic device is related to the service quality and the service life of the electronic device. The traditional heat pipe is suitable for heat dissipation of a single-heat-source electronic device, but with the continuous trend of miniaturization and integration of the electronic device, heat sources inside the electronic device are continuously increased, heating power is rapidly increased, and the traditional heat pipe cannot meet the heat dissipation requirement of the electronic device. The plate-shaped heat pipe as a two-dimensional heat transfer device has great potential in heat dissipation of multi-heat-source electronic devices due to the advantages of large cooling surface, uniform heat dissipation and the like.
The vapor chamber, which is a typical plate-shaped heat pipe, has a significant advantage in two-phase enhanced heat transfer. The existing commonly used soaking plate is made of copper base and has the defects of heavier mass, higher cost and the like. Therefore, on the premise of ensuring high heat dissipation capacity, the soaking plate which is lighter in base material and more economic has higher research and development values.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a groove type ultrathin aluminum-based soaking plate and solves the problems of high cost and heavy weight of the conventional soaking plate.
The other technical scheme of the invention is as follows: provides a preparation method of the groove type ultrathin aluminum-based soaking plate.
The technical scheme of the invention is as follows: the utility model provides an ultra-thin aluminium base soaking plate of slot type, including the epitheca board, lower coverboard and filling pipe, the middle part of epitheca board and the middle part of lower coverboard are sunken respectively and are formed the cavity and are located cavity flange all around, the cavity surface has crisscross little groove structure and a plurality of support column, the edge of epitheca board is concave establishes the mouth of pipe, mouth of pipe and cavity intercommunication, filling pipe places in mouth of pipe department, the flange of epitheca board and the flange laminating and the sealing connection of lower coverboard, the support column of lower coverboard is connected to the support column of epitheca board, liquid working medium fills in the cavity through filling pipe, sealed mouth of pipe and filling pipe.
Further, the upper shell plate has a plate thickness of 0.2 to 0.6mm and a dimension of 50X 50mm to 120X 120 mm.
Further, the depth of the upper shell plate cavity is 0.4-1.2mm, and the size is 48mm-108 mm.
Furthermore, the support columns of the upper shell plate and the upper shell plate are integrally formed in a punching mode, the number of the support columns is more than 4, the diameter of each support column is 4-8mm, and the distribution interval is 20-40 mm.
Furthermore, the perfusion tube is made of aluminum material, and the diameter of the perfusion tube is 2-4 mm.
Further, the lower shell plate has a plate thickness of 0.5 to 1.2mm and a dimension of 50X 50mm to 120X 120 mm.
Further, the depth of the lower shell plate cavity is 0.3-1.0mm, and the size of the lower shell plate cavity is 48mm-108 mm.
The other technical scheme of the invention is as follows: the preparation method of the groove type ultrathin aluminum-based soaking plate comprises the following steps:
step S1: selecting a first die to punch the upper shell plate to obtain a concave cavity and a pipe orifice, selecting a second die to punch the upper shell plate for the second time, wherein the second die is provided with a plurality of bosses, and the upper shell plate is sunken to form a plurality of support columns positioned in the concave cavity by punching;
step S2: milling the lower shell plate to obtain a concave cavity and a supporting column;
step S3: machining the surfaces of the concave cavities of the upper shell plate and the lower shell plate by adopting a cutter to obtain a staggered micro-groove structure;
step S4: the upper shell plate and the lower shell plate are connected in a sealing mode, the filling pipe is placed at the pipe orifice, the pressure in the upper shell plate and the lower shell plate is reduced to be below 10Pa through vacuumizing, the liquid working medium is filled into the cavity through the filling pipe, the liquid working medium accounts for 30-40% of the volume of the cavity, and after filling is finished, the filling pipe and the pipe orifice are welded and sealed respectively.
Further, in step S3, the cutter is a face milling cutter, each cutter angle is 30 °, the cutter diameter is 4mm, and the processing method of the staggered micro-groove structure is as follows: the cutter processes transverse micro grooves on the upper shell plate and the lower shell plate with a vertical feeding depth of 0.2-0.5mm and a lateral feeding depth of 0.5-1.2mm, the upper shell plate and the lower shell plate are rotated by 90 degrees, longitudinal micro grooves are processed on the upper shell plate and the lower shell plate with a vertical feeding depth of 0.2-0.5mm and a lateral feeding depth of 0.5-1.2mm, and the positions with the support columns are not processed.
Further, in step S4, the sealing method of the upper shell plate and the lower shell plate is as follows: covering a brazing filler metal layer between the flanges of the upper shell plate and the lower shell plate, covering a brazing filler metal layer between the support columns of the upper shell plate and the lower shell plate, surrounding a brazing filler metal layer between the filling pipe and the pipe orifice and the flanges, tightly attaching the flanges of the upper shell plate and the lower shell plate by using a clamp, integrally placing the filling pipe and the pipe orifice and the flanges into a vacuum brazing furnace after the filling pipe and the pipe orifice and the flanges are tightly attached, filling vacuum and heating to 590 ℃ of 580 and 590 ℃, and stopping heating and cooling after the brazing filler metal layer is completely melted.
The working principle of the groove type ultrathin aluminum-based soaking plate is as follows: the lower shell plate is used as an evaporation end to be contacted with an external heat source, the upper shell plate is used as a condensation end to be contacted with an external cold source, heat is transferred to the staggered micro-groove structure through the lower shell plate, and the phase change of the liquid working medium soaked in the staggered micro-groove structure is promoted, and the cavity is highly vacuum, so that the phase change of the working medium is realized at a lower wall surface temperature, and a large amount of heat is taken away through phase change latent heat; the steam is quickly diffused to the whole cavity, is cooled and liquefied on a capillary structure at a condensation end, transfers heat to the upper shell plate through gas-liquid phase change, and is taken away by a cold source outside the upper shell plate; the liquefied working medium at the condensation end is driven by the capillary pressure of the staggered micro-groove structure and is transported to the evaporation end again to complete liquid-gas-liquid circulation.
Compared with the prior art, the invention has the following beneficial effects:
compared with a copper-based soaking plate, the groove-type ultrathin aluminum-based soaking plate has the characteristics of light weight, high thermal conductivity, wide material source, low cost and the like. Meanwhile, the space occupancy rate of the ultrathin aluminum-based soaking plate is extremely low, and the requirements of integration and miniaturization of the current electronic products can be well met. The support column structure is favorable for preventing the soaking plate from being extruded or deformed due to overlarge internal vapor pressure in the operation process, and strengthens the backflow of liquid from the condensation end to the evaporation end, thereby improving the integral capillary performance. The staggered micro-groove structure can increase the heat dissipation area and the phase change boiling area, and simultaneously can improve the capillary performance and the liquid-gas-liquid circulation efficiency.
The preparation method of the groove type ultrathin aluminum-based soaking plate is simple to operate, good in machining precision and high in machining efficiency, is suitable for mass production, the wall surface obtained by machining through the precision stamping method is smooth and flat, the efficiency is high, the cost is low, and micro milling based on the three-edge milling cutter can machine micro grooves with high depth-to-width ratio while the space of the concave cavity is guaranteed, so that the capillary performance of the micro grooves is guaranteed.
Drawings
Fig. 1 is a schematic structural view of the grooved ultra-thin aluminum-based soaking plate of the present invention.
Fig. 2 is an exploded view of the grooved ultra-thin aluminum based soaking plate of the present invention.
Fig. 3 is a top view of the lower shell plate in step S2 according to the present invention.
Fig. 4 is a schematic structural view of the cutter of the present invention.
Fig. 5 is a front view of the tool of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a trench-type ultra-thin aluminum-based soaking plate, which includes an upper shell plate 1, a lower shell plate 2 and a filling pipe 3.
As shown in fig. 1, fig. 2 and fig. 3, the middle part of the upper shell plate and the middle part of the lower shell plate are respectively sunken to form a cavity 4 and a flange 5 positioned around the cavity, the surface of the cavity is provided with a staggered micro-groove structure 6 and a plurality of support columns 7, the edge of the upper shell plate is concavely provided with a pipe orifice 8, the pipe orifice is communicated with the cavity, the filling pipe is arranged at the pipe orifice, the flange of the upper shell plate and the flange of the lower shell plate are attached and hermetically connected, the support columns of the lower shell plate are connected with the support columns of the upper shell plate, liquid working media are filled in the cavity through the filling pipe, and the.
In the embodiment, the plate thickness of the upper shell plate is 0.4mm, the size is 120 multiplied by 120mm, the depth of the cavity of the upper shell plate is 0.8mm, and the size is 108 multiplied by 108 mm; the support columns of the upper shell plate and the upper shell plate are integrally formed in a punching mode, the number of the support columns is 9, the diameter of each support column is 6mm, and the distribution interval is 30 mm. The perfusion tube is made of aluminum material, and the diameter of the perfusion tube is 3 mm.
The thickness of the lower shell plate is 0.8mm, and the size is 120 multiplied by 120 mm; the lower shell cavity has a depth of 0.8mm and dimensions of 108 x 108 mm.
The preparation method of the groove type ultrathin aluminum-based soaking plate comprises the following steps:
step S1: prefabricating a first die and a second die, selecting the first die to punch an upper shell plate to obtain a cavity and a pipe orifice of 0.8mm multiplied by 108mm, selecting the second die to punch the upper shell plate for the second time, wherein the second die is provided with a plurality of bosses, the upper shell plate is sunken to form a supporting column of 9 multiplied by phi 6mm by punching, and the supporting column is positioned in the cavity;
step S2: milling the lower shell plate to obtain a concave cavity and a supporting column, as shown in fig. 2;
step S3: machining the surfaces of the concave cavities of the upper shell plate and the lower shell plate by using a cutter 9 to obtain a staggered micro-groove structure; as shown in fig. 4 and 5, the cutter is a three-edge milling cutter, each cutter angle is 30 °, the cutter diameter is 4mm, and the processing method of the staggered micro-groove structure is as follows: the cutter processes transverse micro grooves on the upper shell plate and the lower shell plate with a vertical feeding depth of 0.2mm and a lateral feeding depth of 0.8mm, the upper shell plate and the lower shell plate are rotated by 90 degrees, longitudinal micro grooves are processed on the upper shell plate and the lower shell plate with a vertical feeding depth of 0.2mm and a lateral feeding depth of 0.8mm, and the positions with support columns are not processed.
Step S4: the upper shell plate and the lower shell plate are hermetically connected, the filling pipe is placed at the pipe orifice, and the sealing method of the upper shell plate and the lower shell plate comprises the following steps: covering a brazing filler metal layer between the flanges of the upper shell plate and the lower shell plate, covering a brazing filler metal layer between the support columns of the upper shell plate and the lower shell plate, surrounding a brazing filler metal layer between the filling pipe and the pipe orifice and the flanges, tightly attaching the flanges of the upper shell plate and the lower shell plate by using a clamp, integrally placing the filling pipe and the pipe orifice and the flanges into a vacuum brazing furnace after the filling pipe is tightly attached to the pipe orifice and the flanges, filling vacuum and heating to 590 ℃, stopping heating and cooling after the brazing filler metal layer is completely melted; the pressure in the upper shell plate and the lower shell plate is reduced to 5Pa through vacuumizing, the liquid working medium is filled into the cavity through the filling pipe, in the embodiment, 3ml of acetone is filled as the liquid working medium, the liquid working medium accounts for 40% of the volume of the cavity, after the filling is finished, the liquid filling pipe is sealed through cold welding, the pipe orifice is sealed through cold welding, and then the argon arc welding, laser welding or reflow welding is carried out to carry out integral sealing reinforcement.
The working principle of the groove type ultrathin aluminum-based soaking plate is as follows: the lower shell plate is used as an evaporation end to be contacted with an external heat source, the upper shell plate is used as a condensation end to be contacted with an external cold source, heat is transferred to the staggered micro-groove structure through the lower shell plate, and the phase change of the liquid working medium soaked in the staggered micro-groove structure is promoted, and the cavity is highly vacuum, so that the phase change of the working medium is realized at a lower wall surface temperature, and a large amount of heat is taken away through phase change latent heat; the steam is quickly diffused to the whole cavity, is cooled and liquefied on a capillary structure at a condensation end, transfers heat to the upper shell plate through gas-liquid phase change, and is taken away by a cold source outside the upper shell plate; the liquefied working medium at the condensation end is driven by the capillary pressure of the staggered micro-groove structure and is transported to the evaporation end again to complete liquid-gas-liquid circulation.
Example 2
The difference between the embodiment and the embodiment 1 is that the plate thickness of the upper shell plate is 0.2mm, the size is 50 multiplied by 50mm, the depth of the cavity of the upper shell plate is 0.4mm, and the size is 48 multiplied by 48 mm; the diameter of the support columns is 4mm, and the distribution interval is 20 mm. The perfusion tube is made of aluminum material, and the diameter of the perfusion tube is 2 mm.
The thickness of the lower shell plate is 0.5mm, and the size is 50 multiplied by 50 mm; the depth of the lower shell plate cavity is 0.3mm, and the size is 48 multiplied by 48 mm.
Example 3
The thickness of the upper shell plate is 0.6mm, the size is 100 multiplied by 100mm, the depth of the concave cavity of the upper shell plate is 1.2mm, and the size is 88 multiplied by 88 mm; the diameter of the support columns is 8mm, and the distribution interval is 40 mm. The perfusion tube is made of aluminum material, and the diameter of the perfusion tube is 4 mm.
The thickness of the lower shell plate is 1.2mm, and the size is 100 multiplied by 100 mm; the lower shell cavity depth is 1.0mm and the dimensions 88 x 88 mm.
As mentioned above, the present invention can be better realized, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present disclosure are intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. The utility model provides an ultra-thin aluminium base soaking board of slot type, a serial communication port, including last coverboard, lower coverboard and filling pipe, the middle part of going up the coverboard and the middle part of lower coverboard are sunken respectively and are formed the cavity and are located cavity flange all around, the cavity surface has crisscross little groove structure and a plurality of support column, the edge of going up the coverboard is concave establishes the mouth of pipe, mouth of pipe and cavity intercommunication, filling pipe places in mouth of pipe department, the flange of going up the coverboard and the flange laminating and the sealing connection of lower coverboard, the support column of lower coverboard is connected to the support column of going up the coverboard, liquid working medium fills in the cavity through filling pipe, sealed mouth of pipe and filling.
2. The grooved ultra-thin aluminum-based soaking plate according to claim 1, wherein the upper shell plate has a plate thickness of 0.2 to 0.6mm and a size of 50 x 50mm to 120 x 120 mm.
3. The grooved ultra-thin aluminum based soaking plate according to claim 1, wherein the depth of the upper shell plate cavity is 0.4-1.2mm and the size is 48 x 48mm-108 x 108 mm.
4. The grooved ultrathin aluminum-based soaking plate according to claim 1, wherein the supporting columns of the upper shell plate and the upper shell plate are formed in an integrated punch forming mode, the number of the supporting columns is more than 4, the diameter of each supporting column is 4-8mm, and the distribution interval is 20-40 mm.
5. The grooved ultra-thin aluminum-based soaking plate according to claim 1, wherein the filling pipe is made of aluminum material and has a diameter of 2-4 mm.
6. The grooved ultra-thin aluminum-based soaking plate according to claim 1, wherein the lower shell plate has a plate thickness of 0.5 to 1.2mm and a size of 50 x 50mm to 120 x 120 mm.
7. The grooved ultra-thin aluminum based soaking plate according to claim 1, wherein the depth of the lower shell plate cavity is 0.3-1.0mm, and the size is 48 x 48mm-108 x 108 mm.
8. The preparation method of the groove type ultrathin aluminum-based soaking plate as claimed in any one of claims 1 to 7 is characterized by comprising the following steps:
step S1: selecting a first die to punch the upper shell plate to obtain a concave cavity and a pipe orifice, selecting a second die to punch the upper shell plate for the second time, wherein the second die is provided with a plurality of bosses, and the upper shell plate is sunken to form a plurality of support columns positioned in the concave cavity by punching;
step S2: milling the lower shell plate to obtain a concave cavity and a supporting column;
step S3: machining the surfaces of the concave cavities of the upper shell plate and the lower shell plate by adopting a cutter to obtain a staggered micro-groove structure;
step S4: the upper shell plate and the lower shell plate are connected in a sealing mode, the filling pipe is placed at the pipe orifice, the pressure in the upper shell plate and the lower shell plate is reduced to be below 10Pa through vacuumizing, the liquid working medium is filled into the cavity through the filling pipe, the liquid working medium accounts for 30-40% of the volume of the cavity, and after filling is finished, the filling pipe and the pipe orifice are welded and sealed respectively.
9. The method for preparing the grooved ultra-thin aluminum-based soaking plate according to claim 8, wherein in the step S3, the cutter is a face milling cutter, each cutter angle is 30 °, the cutter diameter is 4mm, and the processing method of the staggered micro-groove structure is as follows: the cutter processes transverse micro grooves on the upper shell plate and the lower shell plate with a vertical feeding depth of 0.2-0.5mm and a lateral feeding depth of 0.5-1.2mm, the upper shell plate and the lower shell plate are rotated by 90 degrees, longitudinal micro grooves are processed on the upper shell plate and the lower shell plate with a vertical feeding depth of 0.2-0.5mm and a lateral feeding depth of 0.5-1.2mm, and the positions with the support columns are not processed.
10. The method for preparing the grooved ultra-thin aluminum-based soaking plate according to claim 8, wherein in the step S4, the sealing method of the upper shell plate and the lower shell plate is as follows: covering a brazing filler metal layer between the flanges of the upper shell plate and the lower shell plate, covering a brazing filler metal layer between the support columns of the upper shell plate and the lower shell plate, surrounding a brazing filler metal layer between the filling pipe and the pipe orifice and the flanges, tightly attaching the flanges of the upper shell plate and the lower shell plate by using a clamp, integrally placing the filling pipe and the pipe orifice and the flanges into a vacuum brazing furnace after the filling pipe and the pipe orifice and the flanges are tightly attached, filling vacuum and heating to 590 ℃ of 580 and 590 ℃, and stopping heating and cooling after the brazing filler metal layer is completely melted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010760303.9A CN111843394A (en) | 2020-07-31 | 2020-07-31 | Groove type ultrathin aluminum-based soaking plate and preparation method thereof |
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| CN202010760303.9A CN111843394A (en) | 2020-07-31 | 2020-07-31 | Groove type ultrathin aluminum-based soaking plate and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115135109A (en) * | 2022-07-12 | 2022-09-30 | 哈尔滨工业大学 | Temperature equalization plate structure and electronic equipment for inclined use at any angle |
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2020
- 2020-07-31 CN CN202010760303.9A patent/CN111843394A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115135109A (en) * | 2022-07-12 | 2022-09-30 | 哈尔滨工业大学 | Temperature equalization plate structure and electronic equipment for inclined use at any angle |
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