CN109822000B - Plate type heat pipe processing method - Google Patents
Plate type heat pipe processing method Download PDFInfo
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- CN109822000B CN109822000B CN201910149438.9A CN201910149438A CN109822000B CN 109822000 B CN109822000 B CN 109822000B CN 201910149438 A CN201910149438 A CN 201910149438A CN 109822000 B CN109822000 B CN 109822000B
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- 238000005096 rolling process Methods 0.000 claims abstract description 79
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- 238000005520 cutting process Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 20
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- 238000012545 processing Methods 0.000 claims abstract description 11
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- 239000000758 substrate Substances 0.000 claims description 34
- 230000002401 inhibitory effect Effects 0.000 claims description 30
- 238000007664 blowing Methods 0.000 claims description 14
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a method for processing a plate type heat pipe, which comprises the following steps of S20: printing and closing, step S30: hot rolling, step S60: inflation, step S70: cutting, and step S90: and (6) bending. According to the processing method of the plate type heat pipe, the design of the printing area of the rolling inhibitor and subsequent processes of cutting, bending and the like are adopted, so that the integral forming structure of the plate type heat pipe is realized, the product heat dissipation effect is good, the operation is simple, the processing is easy, and the production cost can be effectively controlled.
Description
Technical Field
The invention relates to the technical field of heat dissipation, in particular to a method for processing a plate type heat pipe.
Background
With the development of electronic components towards miniaturization, high power and high performance, the heat dissipation problem gradually becomes a bottleneck problem restricting the development of high-integration electronic components along with higher heat flux density in the development process. Due to high thermal conductivity and good temperature uniformity, the plate-type heat pipe can quickly transfer and diffuse a heat source with high thermal density, meets the requirements of electronic equipment on compactness, reliability, flexibility and the like of a heat dissipation device, and gradually becomes an excellent choice for researching and solving the problem of surface heat dissipation of high-power equipment.
At present, plate heat pipes have been used to replace conventional pure metal heat sink fins, which can reduce heat source and air thermal resistance to the maximum extent, and effectively enhance the convective heat transfer and thermal radiation on the surface of the heat sink. However, the application of the fins is limited to the mode of being mounted on the base plate of the radiator at present, and when the base plate is a plate type heat pipe and the fins are metal fins, the heat dissipation capacity of the fins is limited; when the base plate is a metal plate and the fins are plate heat pipes, the heat transfer capacity of the base plate is poor, the temperature equalizing capacity of the radiator is reduced due to the two connecting structures, the heat dissipation capacity is poor, and the heat dissipation requirement cannot be met.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the problems in the prior art, a method for processing a plate-type heat pipe which is easy to process and has a good heat dissipation effect is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for processing a plate-type heat pipe comprises the following steps,
step S20: printing and covering, namely preparing two metal substrates, wherein one metal substrate is printed with a rolling inhibitor, the area printed with the rolling inhibitor on the metal substrate comprises a first rolling inhibiting area and a plurality of second rolling inhibiting areas which are connected with the first rolling inhibiting area, and after covering the two metal substrates, the rolling inhibitor is clamped between the two metal substrates;
step S30: hot rolling, namely feeding the covered double-layer metal substrate into a hot rolling mill to be rolled into a composite plate;
step S60: blowing, namely mounting the composite plate on a bulging machine after a blowing opening is formed in the composite plate, then introducing high-pressure gas from the blowing opening, wherein a part, corresponding to a first resistance rolling area, of the composite plate is expanded to form a first cavity, a part, corresponding to a second resistance rolling area, of the composite plate is expanded to form a second cavity communicated with the first cavity, and the first cavity and the second cavity jointly form a closed cavity;
step S70: cutting, namely scribing between every two adjacent second cavities and cutting along the scribing to form fin dividing lines, wherein a bending part is formed at the part between every two adjacent fin dividing lines;
step S80: and bending, namely bending the bending part to form a fin part, so that an included angle alpha is formed between the fin part and the composite board, and a space clamped between every two adjacent fin parts forms a heat dissipation space.
Further, in step S20, the second rolling-blocking areas are all protruded on the same side of the first rolling-blocking area, and the second rolling-blocking areas are parallel to each other.
Further, in step S20, a plurality of first vacancy areas sequentially arranged at intervals are provided in the first rolling-resisting area, a plurality of second vacancy areas sequentially arranged at intervals are provided in the second rolling-resisting area, and the first vacancy areas and the second vacancy areas are areas where no rolling-resisting agent is printed.
Further, in step S20, the two metal substrates after being covered are fixedly connected by riveting.
Further, in step S30, before the double-layered metal substrate is rolled in the hot rolling mill, the double-layered metal substrate is heated in a heating furnace at a temperature of 420 to 480 ℃.
Further, in step S80, the plurality of fin portions are parallel to each other, and the included angle α is 90 °.
Further, in step S20, graphite is used as the rolling inhibitor.
Further, the processing method further comprises the following steps after the step S30 and before the step S60,
step S40: cold rolling and leveling, namely feeding the composite plate formed after hot rolling into a cold rolling mill for cold rolling treatment to level the composite plate;
step S50: and (4) annealing treatment, namely placing the cold-rolled and leveled composite board on a conveying frame, then sending the composite board into an annealing furnace, annealing at 400-500 ℃, and then cooling the composite board on a lower frame.
Further, the processing method further includes the following steps after the step S80,
step S90: filling working medium and sealing, opening a filling opening on the bent composite board, vacuumizing the filling opening, filling the phase-change working medium, and then welding and sealing the filling opening and the blowing opening, so that the phase-change working medium is sealed in the closed cavity, and the plate type heat pipe is finally molded.
Further, before the step S20, the processing method further includes the following steps,
step S10: step S10: blanking, cutting the metal sheet into two metal substrates with the same size according to the size requirement.
The invention has the beneficial effects that: according to the processing method of the plate type heat pipe, the design of the printing area of the rolling inhibitor and subsequent processes of cutting, bending and the like are adopted, so that the integral forming structure of the plate type heat pipe is realized, the product heat dissipation effect is good, the operation is simple, the processing is easy, and the production cost can be effectively controlled.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a perspective view of a plate heat pipe according to a first embodiment of the present invention;
FIG. 2 is a front view of the plate heat pipe of FIG. 1;
FIG. 3 is a cross-sectional view A-A of the plate heat pipe of FIG. 2;
FIG. 4 is a schematic structural diagram of a fin portion of the plate heat pipe shown in FIG. 1;
FIG. 5 is a cross-sectional view B-B of the fin portion of FIG. 4;
FIG. 6 is a top view of the plate heat pipe of FIG. 1;
FIG. 7 is a process flow chart of a method for manufacturing a plate heat pipe according to a first embodiment of the present invention;
FIG. 8 is a schematic view of the structure of a metal substrate printing blocker in the process of FIG. 7;
FIG. 9 is a schematic view of the composite panel after score cutting in the process of FIG. 7;
fig. 10 is a perspective view of a plate heat pipe according to a second embodiment of the present invention.
The names and the numbers of the parts in the figure are respectively as follows:
First connecting portion 31 bent portion 204 fin dividing line 205
First rolling-resistant region 11 and second rolling-resistant region 12 of metal substrate 1
Transition 2051 of the third rolling-resistant zone 13 to a first notch 2052
Second intersection 2055
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
Example one
Referring to fig. 1 to 5, a plate heat pipe according to an embodiment of the present invention is provided for transferring and diffusing heat of a heat source (e.g., an electronic component or an electronic device), and includes a flat plate portion 10 and a plurality of fin portions 20 disposed on the flat plate portion 10, the flat plate portion 10 is provided with a first cavity 101, each fin portion 20 is provided with a second cavity 201, each second cavity 201 is communicated with the first cavity 101, the plate heat pipe is provided with a closed cavity (not shown), the closed cavity includes the first cavity 101 and the second cavity 201, a phase change working medium (not shown) is filled in the closed cavity, and the fin portions 20 have a heat dissipation effect. When the heat dissipation device works, the liquid phase-change working medium in the first cavity 101 absorbs heat of a heat source and then vaporizes, the gaseous phase-change working medium rapidly expands to fill the whole closed cavity, and after the gaseous phase-change working medium in the second cavity 201 dissipates heat at the fin part 20, the gaseous phase-change working medium is liquefied, and then the liquid phase-change working medium is guided to flow back into the first cavity 101 again.
In addition, fluid channels (not shown) are arranged in the first cavity 101 and the second cavity 201, and after the liquid phase-change working medium in the first cavity 101 absorbs the heat of the heat source to be vaporized, the gaseous phase-change working medium can rapidly expand along the fluid channels to fill the whole closed cavity. Specifically, a plurality of isolated portions 103 are provided in both the first cavity 101 and the second cavity 201, the plurality of isolated portions 103 in the first cavity 101 partition the first cavity 101 to form a plurality of fluid passages communicating with each other, and the plurality of isolated portions 103 in the second cavity 201 partition the second cavity 201 to form a plurality of fluid passages communicating with each other. Specifically, the isolated portion 103 is a dot-shaped structure or a block-shaped structure disposed in the first cavity 101 and the second cavity 201, and the isolated portion 103 is formed by attaching corresponding sidewalls of the first cavity 101 and the second cavity 201. In addition, the width of the fluid channel is 2-10mm, so that the gaseous phase-change working medium can flow rapidly along the fluid channel, and meanwhile, the liquid phase-change working medium in the second cavity 201 can flow into the first cavity 101 along the fluid channel. Preferably, the width of the fluid channel in this embodiment is 4 mm.
It is understood that in other embodiments not shown, the isolated portion 103 in the first cavity 101 or the isolated portion 103 in the second cavity 201 may be omitted, and in this case, the isolated portions 103 may separate the corresponding first cavity 101 and/or second cavity 201 to form a plurality of fluid passages communicating with each other. The isolated part 103 is a dot-shaped structure or a block-shaped structure arranged in the first cavity 101 and/or the second cavity 201, and the isolated part 103 is formed by attaching corresponding side walls of the first cavity 101 and/or the second cavity 201.
Referring to fig. 6, the flat plate portion 10 is substantially a plate-shaped structure, the fin portions 20 are substantially a long-strip-shaped flat-plate-shaped structure, the plurality of fin portions 20 are located on the same side of the flat plate portion 10 and are arranged in parallel, and an included angle α is formed between the fin portions 20 and the flat plate portion 10, and is greater than 0 degree and less than 180 degrees, so that a three-dimensional structure is formed between the fin portions 20 and the flat plate portion 10, and further, the heat dissipation efficiency is improved. In the present embodiment, the angle α is 90 °.
In the present embodiment, the flat plate portion 10 and the fin portion 20 are formed integrally, so that thermal contact resistance is reduced, and the structure is compact and the processing is facilitated. It is understood that, in other embodiments not shown, the flat plate portion 10 and the fin portion 20 may be separate components, and when in use, only the flat plate portion 10 and the fin portion 20 need to be connected.
In addition, a connecting portion 30 is arranged between the flat plate portion 10 and each fin portion 20, a transition cavity 301 is arranged in the connecting portion 30, the transition cavity 301 is communicated with the first cavity 101 and the second cavity 201, the connecting portion 30 comprises a first connecting portion 31 and a second connecting portion 32 which are connected with each other, the first connecting portion 31 is provided with a first communicating cavity, the second connecting portion 32 is provided with a second communicating cavity, the transition cavity 301 comprises the first communicating cavity and the second communicating cavity, specifically, the first connecting portion 31 is connected with the flat plate portion 10 and the first communicating cavity is communicated with the first cavity 101, and the second connecting portion 32 is connected with the fin portion 20 and the second communicating cavity is communicated with the second cavity 201. A bending included angle (not shown) is formed between the first connecting portion 31 and the second connecting portion 32, and a bending line (not shown) is formed between the first connecting portion 31 and the second connecting portion 32. By providing the connecting portion 30, the fin portion 20 can be conveniently bent, that is, only the connecting portion 30 needs to be bent, so that an included angle can be formed between the fin portion 20 and the flat plate portion 10, and meanwhile, the bent included angle is the same as the included angle α between the flat plate portion 10 and the fin portion 20, that is, the connecting portion 30 is bent, so that the included angle α is formed between the flat plate portion 10 and the fin portion 20.
In this embodiment, the first connecting portion 31 is an isosceles right triangle, the second connecting portion 32 is a right trapezoid, an included angle between a long side of the right trapezoid and one of the waists is 45 °, and the other waist (i.e., the right waist) of the right trapezoid and one right-angle side of the isosceles right triangle are formed by the bending line. Specifically, the hatched portion of the broken line in fig. 2 is the first connection portion 31, and the hatched portion of the broken line in fig. 4 is the second connection portion 32.
In addition, the closed cavity further comprises a transition cavity 301, and the transition cavity 301 is processed by adopting an inflation process. In order to form the transition cavity 301 conveniently, the height h of the transition cavity 301 is 0.3-2mm, the width w of the transition cavity 301 is 2-20mm, and w > 3h is satisfied. Preferably, in the present embodiment, h is 0.75mm, and w is 4 mm. The bending radius of the connecting portion 30 is r, and when 5mm < r < 10mm, h is (0.1-0.15) × r or h is 0.3mm, the larger of h and r; when r is less than 30mm, h is (0.05-0.1) r. In addition, the width of the transition cavity 301 on the connecting part 30 from the edge of the connecting part 30 is not less than 5 mm.
It is understood that in other embodiments, not shown, the connection portion 30 may also be omitted, in which case the fin portion 20 is directly connected to the flat plate portion 10, in which case the closed cavity is formed by the first cavity 101 and the second cavity 201.
The closed cavity is internally provided with a negative pressure state, so that the boiling point of the liquid phase change working medium in the negative pressure state is reduced, the phase change working medium is heated and then quickly evaporated, and heat is transmitted to the fin part 20 in time to dissipate heat. It is understood that the phase change working fluid includes, but is not limited to, water, alcohol, and propanol. In addition, because the closed cavity is an integral communicating channel, the phase change working medium does not need to be filled into the first cavity 101 and the second cavity 201 respectively, and only needs to be filled once, so that the filling efficiency is improved, and the filling cost is saved. In addition, in a non-heat dissipation working state, the liquid level of the phase change working medium is lower than the upper edge of the first cavity 101.
When the heat-exchange device is used, a heat source needing heat dissipation is attached to the inner side (namely, the side far away from the fin part 20) of the flat plate part 10, or is close to the inner side of the flat plate part 10, heat of the heat source is transferred to the flat plate part 10 from the inner side of the flat plate part 10, a liquid phase-change working medium absorbs heat and then is vaporized, flows to the fin part 20 to release heat and is condensed into the liquid phase-change working medium, and the.
It should be noted that, when the plate heat pipe is installed, when the fin portion 20 is located above the flat plate portion 10, in this way, when the gaseous phase-change working medium is liquefied by being cooled at the fin portion 20 to generate the liquid phase-change working medium, the liquid phase-change working medium can automatically flow back into the first cavity 101 of the base plate 10 under the action of its own gravity.
Based on this, referring to fig. 7, the present invention further provides a processing method for processing the plate heat pipe, including the following steps:
step S10: blanking, leveling the metal sheet, and cutting the metal sheet into two metal substrates 1 with the same size according to the process requirements. If oil stain impurities remain on the metal sheet, in order to ensure the performance of the plate-type heat pipe, before cutting, the oil stain is removed after the metal sheet is subjected to surface treatment such as alkaline oil removal, acid-base neutralization, warm water spraying, drying and the like in sequence. In the present embodiment, the metal sheet is an aluminum sheet or an aluminum alloy sheet. The aluminum sheet has the advantages of light weight, easy processing, strong corrosion resistance, low cost and capability of effectively controlling the production cost. It will be appreciated that in other embodiments not shown, the metal sheet may alternatively be a copper sheet or the like.
Step S20: printing and covering, referring to fig. 8, printing the rolling inhibitor on one of the metal substrates 1 according to the pattern and size required by the process, wherein the area of the shaded portion in fig. 5 is the area of printing the rolling inhibitor. The rolling inhibitor is dried and then solidified on the metal base plate 1, and then the other metal base plate 1 is covered on the metal base plate 1 printed with the rolling inhibitor, so that the rolling inhibitor is clamped between the two metal base plates 1.
It should be noted that the rolling inhibitor is a material that prevents the double-layer metal-based plate from being bonded by rolling, and for example, a conventional rolling inhibitor is a graphite emulsion. The rolling inhibitor is coated or printed between the double-layer metal substrate materials, so that when the double-layer metal substrate is rolled and compounded, the areas coated or printed with the rolling inhibitor cannot be rolled and combined into a whole, the double-layer metal substrate of the areas still keeps a mutually separated double-layer structure, and pipelines are formed at the parts coated or printed with the rolling inhibitor through blowing.
Specifically, the rolling inhibitor is completely located in the plate surface of the metal substrate 1, and the area printed with the rolling inhibitor on the metal cover plate 1 includes a first rolling-inhibiting area 11 and a plurality of second rolling-inhibiting areas 12 which are connected with the first rolling-inhibiting area 11. The first nip area 11 is provided with a plurality of first vacant areas 111 arranged at intervals in sequence, and the first vacant areas 111 refer to areas where no nip inhibitor is printed. The second nip region 12 is provided with a plurality of second void regions 121 arranged at intervals in sequence, and the second void regions 121 refer to regions where no nip inhibitor is printed. In addition, the first vacancy areas 111 and the second vacancy areas 121 are both circular structures, the distance between the centers of circles of every two adjacent first vacancy areas 111 is equal, and the distance between the centers of circles of every two adjacent second vacancy areas 121 is equal.
In the present embodiment, the rolling inhibitor is a graphite emulsion. In addition, in order to avoid the two covered metal substrates 1 from loosening before rolling and being inconvenient for subsequent processing, in the embodiment, the two metal substrates 1 are fixedly connected by riveting.
In this embodiment, the area of the metal cover plate 1 printed with the rolling inhibitor further includes a third rolling-inhibiting area 13, the third rolling-inhibiting area 13 is located between the first rolling-inhibiting area 11 and the second rolling-inhibiting area 12, specifically, one end of the third rolling-inhibiting area 13 is connected to the first rolling-inhibiting area 11, and the other end of the third rolling-inhibiting area 13 is connected to the second rolling-inhibiting area 12, wherein an included angle formed between the third rolling-inhibiting area 13 and the first rolling-inhibiting area 11 is 45 °, an included angle formed between the third rolling-inhibiting area 13 and the second rolling-inhibiting area 12 is 45 °, and the first rolling-inhibiting area 11 and the second rolling-inhibiting area 12 are perpendicular to each other.
Step S30: and (3) hot rolling, namely putting the covered double-layer metal substrate 1 into a heating furnace for heating, wherein the heating temperature is 420-480 ℃, and the heated double-layer metal substrate 1 is sent into a hot rolling machine for rolling, so that the double-layer metal substrate 1 is rolled into the composite plate. In the clad plate formed after hot rolling, due to the presence of the first vacancy section 111 and the second vacancy section 121, portions of the two metal base plates 1 corresponding to the first vacancy section 111 and the second vacancy section 121 are rolled together, so that the regions of the clad plate corresponding to the first vacancy section 111 are rolled together to form the isolated portion 103, and the regions of the clad plate corresponding to the second vacancy section 121 are rolled together to form the isolated portion 103. In the present embodiment, the heating temperature is 450 ℃.
And step S40, cold rolling and leveling, wherein in order to ensure the flatness of the composite plate, the composite plate formed after hot rolling needs to be sent into a cold rolling mill for cold rolling treatment, and the composite plate after cold rolling is leveled. Meanwhile, the effect of adjusting the length of the finished product can be achieved through cold rolling operation. The hot rolled clad plate is elongated after rolling, but the elongation after hot rolling has an error, and thus the hot rolled clad plate is sorted by length and controlled to have a predetermined length by cold rolling.
Step S50: and (4) annealing treatment, namely placing the rolled composite plate on a transmission frame, then sending the composite plate into an annealing furnace, and after annealing at the temperature of 400-500 ℃, cooling the composite plate on a lower frame. Through annealing treatment, the residual stress generated in the cold rolling and leveling process of the composite plate can be effectively reduced, and the deformation of the composite plate is avoided. In this embodiment, the composite sheet is annealed after being heated to 450 ℃.
And step S60, blowing, namely, after a blowing opening is formed in the composite plate, mounting the composite plate on a bulging machine, and then introducing high-pressure gas from the blowing opening. The region of the composite board corresponding to the first rolling-resistant region 11 is expanded due to the fact that rolling agent cannot be rolled in the first rolling-resistant region 11, so that a first cavity 101 is formed, meanwhile, the region of the composite board corresponding to the second rolling-resistant region 12 is expanded due to the fact that rolling agent cannot be rolled in the second rolling-resistant region 12, so that a second cavity 201 is formed, the first rolling-resistant region 11 is connected with the second rolling-resistant region 12, the first cavity 101 is communicated with the second cavity 201, and the first cavity 101 and the second cavity 202 form a part of the closed cavity.
In this embodiment, due to the effect of the rolling agent in the third rolling-resistant region 13, the portion of the composite board corresponding to the third rolling-resistant region 13 is expanded due to the fact that the composite board cannot be rolled together, so as to form a long transition cavity (not shown), and the transition cavity is communicated with the first cavity 101 and the second cavity 201.
In the embodiment, the composite plate is placed into a die of the expanding machine and then is matched, so that the air inlet of the upper die is aligned to the blowing opening of the composite plate, the air inlet valve is opened, and the closed cavity is formed on the composite plate.
Step S70: cutting, referring to fig. 9, lines are scribed between every two adjacent second cavities 201, so that every two adjacent second cavities 201 are separated by the scribed lines, and then fin split lines 205 penetrating through two surfaces of the composite plate are cut along each line, so that a bent portion 204 capable of being bent is formed at a portion between every two adjacent fin split lines 205. It is understood that in other embodiments not shown, the scribing lines may be omitted, and in this case, the fin dividing lines 205 are cut directly between two adjacent second cavities 201.
In this embodiment, the fin dividing line 205 includes a transition section 2051, and a first notch section 2052 and a second notch section 2053 respectively connected to two ends of the transition section 2051, where the transition section 2051 is parallel to the transition cavity, the first notch section 2052 is parallel to the first cavity 101, and the second notch section 2053 is parallel to the second cavity 201.
In addition, the intersection of the transition section 2051 and the first notch section 2052 forms a first intersection 2054, the intersection of the transition section 2051 and the second notch section 2053 forms a second intersection 2055, a connecting part 30 is formed in a region formed by the first intersection 2054 and the second intersection 2055 on one fin dividing line 205 and a connecting line between the first intersection 2054 and the second intersection 2055 on the adjacent fin dividing line 205, the connecting part 30 is in a parallelogram structure, one included angle of the parallelogram is 45 °, and the transition cavity is arranged on the connecting part 30. In this embodiment, one end of the first cut-trace section 2052 on one of the two adjacent fin dividing lines 205, which is far from the transition section 2051, is located on an extension line of the second cut-trace section 2053 on the other fin dividing line 205, and a connecting line between one end of the first cut-trace section 2052 on one of the two adjacent fin dividing lines 205, which is far from the transition section 2051, and the second intersection point 2055 on the other fin dividing line 205 forms a bending line (not shown), the bending line divides the connecting part 30 into a first connecting part 31 and a second connecting part 32, a part of the transition cavity, which is located on the first connecting part 31, is communicated with the first cavity 101, a part of the transition cavity, which is located on the second connecting part 32, is communicated with the second cavity 201, wherein the first connecting part 31 is in the form of an isosceles right triangle, the second connecting part 32 is in the form of a right trapezoid, and an included angle between a long side of the direct trapezoid and one waist is 45, and the other waist of the right trapezoid and one right-angle side of the isosceles right triangle are both formed by the bending line. Therefore, a user only needs to bend the connecting part 30 according to the bending line, the operation of the user is facilitated, and the first cavity 101 and the second cavity 201 which are bent can be communicated through the transition cavity. Meanwhile, waste materials cannot be generated between the two adjacent bending parts 204 in the cutting process, and the utilization rate of the composite board is further improved.
Step S80: filling and sealing a phase-change working medium, forming a filling opening on the bent composite board, vacuumizing the filling opening, and welding and sealing the filling opening and the blowing opening after filling the phase-change working medium, so that the phase-change working medium is sealed in the closed cavity.
Step S90: and bending, namely bending the bent parts 204 towards the same side according to the bending lines to form the fin parts 20, so that the fin parts 20 are parallel to each other, the fin parts 20 are perpendicular to the composite board, and finally the plate type heat pipe is molded. It is understood that in other embodiments not shown, the fin portion 20 and the composite plate may also form an acute angle therebetween, and is not limited thereto.
Compared with the conventional structure, the plate-type heat pipe provided by the first embodiment of the invention reduces the contact thermal resistance, and because the flat plate part 10 and the fin part 20 share the closed cavity, the temperature equalizing capability of the flat plate part 10 in contact with a heat source and the fin part 20 for heat dissipation is improved, the heat dissipation effect is improved, and the heat dissipation requirement on the surface of high-power equipment can be met. In addition, the processing method of the plate type heat pipe provided by the invention realizes an integrated forming structure through the design of the printing pattern of the rolling inhibitor and subsequent processes of marking, bending and the like, is simple to operate, is easy to process, and can effectively control the production cost.
Example two
Referring to fig. 10, a plate heat pipe according to a second embodiment of the present invention is different from the plate heat pipe according to the first embodiment in that: in this embodiment, the isolated portion 103 is omitted, and at this time, the first cavity 101 and the second cavity 102 can be communicated as well and form a part of the closed cavity, so that the temperature equalizing capability of the flat plate portion 10 in contact with a heat source and the fin portion 20 for heat dissipation is improved, the heat dissipation effect is improved, the heat dissipation requirement on the surface of a high-power device can be met, and compared with the first embodiment, the plate heat pipe of the present embodiment is easier to process, and further the production cost is effectively controlled.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. A method for processing a plate-type heat pipe comprises the following steps,
step S20: printing and covering, namely preparing two metal substrates, wherein one metal substrate is printed with a rolling inhibitor, the area printed with the rolling inhibitor on the metal substrate comprises a first rolling inhibiting area and a plurality of second rolling inhibiting areas which are connected with the first rolling inhibiting area, the area printed with the rolling inhibitor on the metal substrate also comprises a third rolling inhibiting area which is connected with the first rolling inhibiting area and the second rolling inhibiting area, the included angle formed between the third rolling inhibiting area and the first rolling inhibiting area as well as between the third rolling inhibiting area and the second rolling inhibiting area is 45 degrees, and after the two metal substrates are covered, the rolling inhibitor is clamped between the two metal substrates;
step S30: hot rolling, namely feeding the covered double-layer metal substrate into a hot rolling mill to be rolled into a composite plate;
step S60: blowing, namely mounting the composite plate on a bulging machine after a blowing opening is formed in the composite plate, then introducing high-pressure gas from the blowing opening, wherein a region, corresponding to a first resistance rolling region, on the composite plate is blown to form a first cavity, a region, corresponding to a second resistance rolling region, on the composite plate is blown to form a second cavity communicated with the first cavity, part of a third resistance rolling region is blown to form a transition cavity, and the first cavity and the second cavity are both communicated with the transition cavity;
step S70: cutting, cutting and forming a fin cutting line between every two adjacent second cavities, wherein a bending part is formed at the part between every two adjacent fin cutting lines, each fin cutting line comprises a transition section and a first cutting mark section and a second cutting mark section which are respectively connected to two ends of the transition section, the transition section is parallel to the transition cavity, the first cutting mark section is parallel to the first cavity, the second cutting mark section is parallel to the second cavity, a first intersection point is formed at the intersection point of the transition section and the first cutting mark section, a second intersection point is formed at the intersection point of the transition section and the second cutting mark section, a connecting part is formed in an area formed by connecting lines between the two first intersection points and the two second intersection points on the two adjacent transition sections, the connecting part is of a parallelogram structure, and one included angle of the parallelogram is 45 degrees, the transition cavity is arranged on the connecting part;
step S90: bending, in two adjacent fin dividing lines, one end of the first cut trace section on one of the fin dividing lines, which is far away from the transition section, is positioned on an extension line of the second cut trace section on the other fin dividing line, and a connecting line between one end of the first cut trace section on one of the fin dividing lines, which is far away from the transition section, and the second intersection point on the other fin dividing line forms a bending line, the connecting part is partitioned into a first connecting part and a second connecting part through the bending line, a part of the transition cavity, which is positioned on the first connecting part, is communicated with the first cavity, a part of the transition cavity, which is positioned on the second connecting part, is communicated with the second cavity, the first connecting part is arranged in an isosceles right triangle shape, and the second connecting part is arranged in a right trapezoid shape, and setting an included angle between the long side of the right trapezoid and one waist of the right trapezoid to be 45 degrees so that the other waist of the right trapezoid and one right-angle side of the isosceles right triangle are formed by the bending line, and bending the bending part along the bending line to form a fin part so as to form an included angle alpha between the fin part and the composite board.
2. A plate heat pipe processing method according to claim 1, wherein: in step S20, the two covered metal substrates are fixedly connected by riveting.
3. A plate heat pipe processing method according to claim 1, wherein: in step S30, before the double-layered metal substrate is rolled in the hot rolling mill, the double-layered metal substrate is heated in a heating furnace at a temperature of 420 to 480 ℃.
4. A plate heat pipe processing method according to claim 1, wherein: in step S90, the fin portions are parallel to each other.
5. A plate heat pipe processing method according to claim 1, wherein: in step S20, the rolling inhibitor is a graphite emulsion.
6. A plate heat pipe processing method according to any one of claims 1 to 5, wherein: the processing method further includes the following steps after step S30 and before step S60,
step S40: cold rolling and leveling, namely feeding the composite plate formed after hot rolling into a cold rolling mill for cold rolling treatment to level the composite plate;
step S50: and (4) annealing treatment, namely placing the cold-rolled and leveled composite board on a conveying frame, then sending the composite board into an annealing furnace, and annealing at 400-500 ℃.
7. A plate heat pipe processing method according to claim 1, wherein: the processing method further includes the following steps after step S70 and before step S90,
step S80: filling working medium and sealing, opening a filling opening on the bent composite plate, vacuumizing the filling opening, filling the phase-change working medium, and then welding and sealing the filling opening and the blowing opening, thereby sealing the phase-change working medium in a sealed cavity and finally forming the plate type heat pipe.
8. A plate heat pipe processing method according to claim 1, wherein: the processing method, before the step S20, further includes the steps of,
step S10: step S10: blanking, cutting the metal sheet into two metal substrates with the same size according to the size requirement.
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| CN110360861B (en) * | 2019-07-19 | 2021-03-26 | 常州恒创热管理有限公司 | Method for processing inflation type soaking plate with capillary structure |
| CN111542202B (en) * | 2020-04-21 | 2021-05-14 | 华南理工大学 | Inflation type soaking plate and manufacturing method thereof |
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| CN103659209B (en) * | 2012-09-11 | 2016-06-29 | 常州市常蒸蒸发器有限公司 | The production technology of high-flatness, single-side blown plate type evaporator |
| CN202902702U (en) * | 2012-10-16 | 2013-04-24 | 河南科隆集团有限公司 | Inflation type evaporator |
| CN105004205B (en) * | 2015-08-06 | 2018-06-08 | 浙江嘉熙科技有限公司 | The hot superconduction heat-exchangers of the plate type of integration and its manufacturing method |
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Address after: 213176 No.20, Jiandong Road, Lijia Town, Wujin District, Changzhou City, Jiangsu Province Patentee after: Changzhou Hengchuang Thermal Management System Co.,Ltd. Country or region after: China Address before: Room 580, 18 Xinya Road, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province 213164 Patentee before: CHANGZHOU HENGCHUANG HEAT MANAGEMENT Co.,Ltd. Country or region before: China |