CN111043884A - Method for manufacturing thin composite heat pipe of mobile phone - Google Patents
Method for manufacturing thin composite heat pipe of mobile phone Download PDFInfo
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- CN111043884A CN111043884A CN201911406472.6A CN201911406472A CN111043884A CN 111043884 A CN111043884 A CN 111043884A CN 201911406472 A CN201911406472 A CN 201911406472A CN 111043884 A CN111043884 A CN 111043884A
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- copper pipe
- pipe
- heat pipe
- copper
- necking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0283—Means for filling or sealing heat pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
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- Laser Beam Processing (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a method for manufacturing a thin composite heat pipe of a mobile phone, which comprises the following steps: providing a hollow round copper pipe with groove teeth on the inner wall; step two: necking one end of the copper pipe; step three: putting the cut braided copper wire into a copper pipe from the end which is not reduced; step four: flattening the non-necking end long section of the copper pipe with the braided copper wire to 0.5-2.0 mm; step five: sealing and welding the flattened flat end, and sintering at high temperature; step six: filling a medium into the copper pipe, vacuumizing and sealing to form a semi-finished product; step seven: riveting and pressing the flattened position of the semi-finished product close to the necking end, and then sealing and welding to form a heat pipe; step eight: flattening the heat pipe to 0.5-2.0 mm. The invention adopts the laser welding mode to seal, and the seals at two ends are flat ends, so that no invalid section is generated, and the use efficiency of the heat pipe is improved; two side steam channels with different sizes can be formed in the copper pipe to meet different use requirements; the composite structure is adopted in the tube, so that the capillary backflow is faster, and the heat conduction effect is better.
Description
Technical Field
The invention relates to a heat pipe, in particular to a method for manufacturing a thin composite heat pipe of a mobile phone.
Background
With the continuous progress of technology, mobile phones are an indispensable part of daily life for consumers. For a mobile phone, the APP which is convenient and fast already occupies the main memory of the mobile phone, and with the acceleration of the operation speed of the mobile phone and the standby for a very long time, the heat generated by the CPU, the mobile phone battery and the screen assembly is more and more, which easily causes the problems of the mobile phone such as heating, scalding, crash and reduction of the operation speed, and brings inconvenience to consumers. Along with this, the traditional mobile phone has been difficult to satisfy the requirement by relying on the graphite heat dissipation mode alone.
At present, heat pipes have been widely used in electronic components with larger heat generation because of their advantage of higher heat transfer capacity. When the heat pipe works, the low-boiling point working medium filled in the pipe body is evaporated and vaporized after the heating end absorbs heat generated by the heating electronic element, and the steam drives the heat to move to the heat dissipation end and is liquefied and condensed at the heat dissipation end to release the heat, so that the electronic element is dissipated. The liquefied working medium flows back to the evaporation part under the action of the capillary structure on the inner wall of the heat pipe, and is continuously evaporated, vaporized, liquefied and condensed, so that the working medium circularly moves in the heat pipe, and the heat generated by the electronic element is continuously dissipated.
The manufacturing method of the known sintering type heat pipe seals one end of a metal pipe in a high temperature fusion way. Next, a metal rod is placed in the tube and metal powder is filled in the tube. After the sintering manufacturing process, the metal bar is pulled out to complete the process. The metal pipe obtained by the processing method has the advantages that the sealed wall end is in a round shape and thicker than the surrounding wall, and the end point of the inner wall is lack of capillary bodies. Thus, current heat pipes are limited in application to the periphery of the pipe wall and cannot utilize the end portion.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for manufacturing a thin composite heat pipe of a mobile phone, wherein seals at two ends are flat ends, and an invalid section cannot be generated.
The technical scheme adopted by the invention for solving the technical problem is as follows: a manufacturing method of a thin composite heat pipe of a mobile phone mainly comprises the following steps:
the method comprises the following steps: providing a hollow round copper pipe with groove teeth on the inner wall;
step two: necking one end of the copper pipe, wherein the size of the necking is 1/3 of the outer diameter of the hollow copper pipe, and the tolerance is plus or minus 0.5 mm;
step three: putting the cut braided copper wire into a copper pipe from the end which is not reduced;
step four: placing the copper pipe with the braided copper wire in a mold, and flattening the long section of the non-necking end to be 0.5-2.0 mm in thickness under a press;
step five: sealing and welding the flattened flat end, and then sintering at a certain temperature and high temperature;
step six: filling a certain medium into the copper pipe, vacuumizing and sealing to form a closed cavity to form a semi-finished product of the heat pipe;
step seven: riveting the flattened position of the semi-finished product of the heat pipe close to the necking end, and then sealing and welding to form a finished product of the heat pipe;
step eight: flattening the heat pipe to the thickness of 0.5-2.0 mm according to the use requirement to obtain the required product.
Furthermore, in the fifth step and the seventh step, the welding modes of the seals at the two ends of the copper pipe are laser welding; the seals at the two ends of the copper pipe are flat heads after laser welding.
Further, in the laser welding, the maximum DA output power is 50-85%; the output power of the corner DA is 10-30%; the maximum PWM duty ratio is 80-100%; the duty ratio of the corner PWM is 20-50%; the PWM frequency is 3000-7000 Hz.
Furthermore, in the eighth step, in the flattened heat pipe, the upper and lower ends of the braided copper wire are attached to the groove teeth on the inner wall of the copper pipe, and two steam channels, namely a left channel and a right channel, are formed between the left side and the right side of the braided copper wire and the inner wall of the copper pipe.
Further, when the braided copper wire is positioned in the middle of the inner part of the copper pipe, the left channel and the right channel are the same in size; when the braided copper wire is positioned at the left part in the copper pipe, the left channel is smaller than the right channel; when the braided copper wire is positioned at the right part in the copper pipe, the left channel is larger than the right channel.
Further, in the fifth step, the high-temperature sintering temperature of the copper pipe is 800-980 ℃, and the sintering time is 2-3 hours.
The invention has the beneficial effects that: compared with the prior art, the method for manufacturing the thin composite heat pipe of the mobile phone has the following advantages:
1) the two ends of the copper pipe are sealed by adopting a laser welding mode, the obtained seal is a flat end, an invalid section cannot be generated, and the use efficiency of the heat pipe is greatly improved;
2) the braided copper wires in the copper pipe can be arranged in the middle, the left part or the right part as required to form two side channels with different sizes, so that different heat dissipation use requirements are met;
3) the heat pipe is internally provided with a composite form of groove teeth and woven copper wires, so that capillary backflow is faster, and the heat conduction effect is better.
Drawings
Fig. 1 is a flowchart of a manufacturing method in embodiment 1.
FIG. 2 is a schematic sectional view of a flattened heat pipe in example 1.
FIG. 3 is a schematic sectional view of a flattened heat pipe in example 2.
FIG. 4 is a schematic sectional view of a flattened heat pipe in example 3.
Wherein, 1-copper tube; 2-necking down; 3-weaving copper wires; 4-a heat pipe; 5-left channel; 6-right channel; 7-flat head; 8-groove teeth.
Detailed Description
The invention is further illustrated by the following specific examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Example 1
A manufacturing method of a thin composite heat pipe of a mobile phone mainly comprises the following steps:
the method comprises the following steps: providing a hollow round copper pipe 1 with groove teeth 8 on the inner wall;
step two: firstly, necking 2 is carried out on one end of a copper pipe 1, the size of the necking 2 is 1/3 of the outer diameter of the hollow copper pipe 1, and the tolerance is plus or minus 0.5 mm;
step three: putting the cut braided copper wire 3 into the copper pipe 1 from the non-necking end;
step four: placing the copper pipe 1 with the braided copper wire 3 in a mould, and flattening the long section at the non-necking end to 0.5-1.0 mm in thickness under a press;
step five: sealing and welding the flattened flat end, and sintering at high temperature, wherein the sintering temperature is 800-900 ℃, and the sintering time is 2-3 hours;
step six: filling a certain medium into the copper pipe, vacuumizing and sealing to form a closed cavity to form a semi-finished product of the heat pipe;
step seven: riveting the flattening position of the semi-finished product of the heat pipe close to the end of the necking 2, and then sealing and welding to form a finished product of the heat pipe 4;
step eight: flattening the heat pipe 4 to the thickness of 0.5-1.0 mm according to the use requirement, and obtaining the required product.
In the fifth step and the seventh step, the welding modes of the seals at the two ends of the copper pipe are laser welding; the seals at the two ends of the copper pipe are flat heads 7 after laser welding.
In the laser welding, the maximum DA output power is 50-85%; the output power of the corner DA is 10-30%; the maximum PWM duty ratio is 80-100%; the duty ratio of the corner PWM is 20-50%; the PWM frequency is 3000-7000 Hz.
In the eighth step, in the flattened heat pipe 4, the upper end and the lower end of the braided copper wire 3 are attached to the groove teeth 8 on the inner wall of the copper pipe 1, and two steam channels, namely a left channel 5 and a right channel 6, are formed between the left side and the right side of the braided copper wire 3 and the inner wall of the copper pipe 1. The braided copper wire 3 is positioned in the middle of the copper pipe 1, and the left channel 5 and the right channel 6 are the same in size.
Example 2
A manufacturing method of a thin composite heat pipe of a mobile phone mainly comprises the following steps:
the method comprises the following steps: providing a hollow round copper pipe 1 with groove teeth 8 on the inner wall;
step two: firstly, necking 2 is carried out on one end of a copper pipe 1, the size of the necking 2 is 1/3 of the outer diameter of the hollow copper pipe 1, and the tolerance is plus or minus 0.5 mm;
step three: putting the cut braided copper wire 3 into the copper pipe 1 from the non-necking end;
step four: placing the copper pipe with the braided copper wire 3 in a mould, and flattening the long section of the non-necking end to be 0.8-1.5 mm in thickness under a press;
step five: sealing and welding the flattened end, and sintering at a high temperature of 850-950 ℃ for 2-3 hours;
step six: filling a certain medium into the copper pipe, vacuumizing and sealing to form a closed cavity to form a semi-finished product of the heat pipe;
step seven: riveting the flattening position of the semi-finished product of the heat pipe close to the end of the necking 2, and then sealing and welding to form a finished product of the heat pipe 4;
step eight: flattening the heat pipe 4 to the thickness of 0.8-1.5 mm according to the use requirement, and obtaining the required product.
In the fifth step and the seventh step, the welding modes of the seals at the two ends of the copper pipe are laser welding; the seals at the two ends of the copper pipe are flat heads 7 after laser welding.
In the laser welding, the maximum DA output power is 50-85%; the output power of the corner DA is 10-30%; the maximum PWM duty ratio is 80-100%; the duty ratio of the corner PWM is 20-50%; the PWM frequency is 3000-7000 Hz.
In the eighth step, in the flattened heat pipe 4, the upper end and the lower end of the braided copper wire 3 are attached to the groove teeth 8 on the inner wall of the copper pipe, and two steam channels, namely a left channel 5 and a right channel 6, are formed between the left side and the right side of the braided copper wire 3 and the inner wall of the copper pipe 1. The braided copper wire 3 is positioned at the left part in the copper pipe 1, and the left channel 5 is smaller than the right channel 6.
Example 3
A manufacturing method of a thin composite heat pipe of a mobile phone mainly comprises the following steps:
the method comprises the following steps: providing a hollow round copper pipe 1 with groove teeth 8 on the inner wall;
step two: firstly, necking 2 is carried out on one end of a copper pipe 1, the size of the necking 2 is 1/3 of the outer diameter of the hollow copper pipe 1, and the tolerance is plus or minus 0.5 mm;
step three: putting the cut braided copper wire 3 into a copper pipe from an uncrimped end;
step four: placing the copper pipe with the braided copper wire 3 in a mould, and flattening the long section of the non-necking end to the thickness of 1.5-2.0 mm under a press;
step five: sealing and welding the flattened end, and sintering at high temperature, wherein the sintering temperature is 900-980 ℃ and the sintering time is 2-3 hours;
step six: filling a certain medium into the copper pipe, vacuumizing and sealing to form a closed cavity to form a semi-finished product of the heat pipe;
step seven: riveting the flattening position of the semi-finished product of the heat pipe close to the end of the necking 2, and then sealing and welding to form a finished product of the heat pipe 4;
step eight: flattening the heat pipe 4 to the thickness of 1.5-2.0 mm according to the use requirement, and obtaining the required product.
In the fifth step and the seventh step, the welding modes of the seals at the two ends of the copper pipe are laser welding; the seals at the two ends of the copper pipe are flat heads 7 after laser welding. In the laser welding, the maximum DA output power is 50-85%; the output power of the corner DA is 10-30%; the maximum PWM duty ratio is 80-100%; the duty ratio of the corner PWM is 20-50%; the PWM frequency is 3000-7000 Hz.
In the eighth step, in the flattened heat pipe 4, the upper end and the lower end of the braided copper wire 3 are attached to the groove teeth 8 on the inner wall of the copper pipe 1, and two steam channels, namely a left channel 5 and a right channel 6, are formed between the left side and the right side of the braided copper wire 3 and the inner wall of the copper pipe 1. The braided copper wire 3 is positioned at the right part in the copper pipe 1, and the left channel 5 is larger than the right channel 6.
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.
Claims (6)
1. A method for manufacturing a thin composite heat pipe of a mobile phone is characterized in that: the manufacturing method mainly comprises the following steps:
the method comprises the following steps: providing a hollow round copper pipe with groove teeth on the inner wall;
step two: necking one end of the copper pipe, wherein the size of the necking is 1/3 of the outer diameter of the hollow copper pipe, and the tolerance is plus or minus 0.5 mm;
step three: putting the cut braided copper wire into a copper pipe from the end which is not reduced;
step four: placing the copper pipe with the braided copper wire in a mold, and flattening the long section of the non-necking end to be 0.5-2.0 mm in thickness under a press;
step five: sealing and welding the flattened flat end, and then sintering at a certain temperature and high temperature;
step six: filling a certain medium into the copper pipe, vacuumizing and sealing to form a closed cavity to form a semi-finished product of the heat pipe;
step seven: riveting the flattened position of the semi-finished product of the heat pipe close to the necking end, and then sealing and welding to form a finished product of the heat pipe;
step eight: flattening the heat pipe to the thickness of 0.5-2.0 mm according to the use requirement to obtain the required product.
2. The method of claim 1, wherein the method comprises the steps of: in the fifth step and the seventh step, the welding modes of the seals at the two ends of the copper pipe are laser welding; the seals at the two ends of the copper pipe are flat heads after laser welding.
3. The method of claim 2, wherein the method comprises the steps of: in the laser welding, the maximum DA output power is 50-85%; the output power of the corner DA is 10-30%; the maximum PWM duty ratio is 80-100%; the duty ratio of the corner PWM is 20-50%; the PWM frequency is 3000-7000 Hz.
4. The method of claim 1, wherein the method comprises the steps of: and step eight, in the flattened heat pipe, the upper end and the lower end of the braided copper wire are attached to the groove teeth on the inner wall of the copper pipe, and two steam channels, namely a left channel and a right channel, are formed between the left side and the right side of the braided copper wire and the inner wall of the copper pipe.
5. The method of claim 4, wherein the method comprises the steps of: when the braided copper wire is positioned in the middle of the copper pipe, the left channel and the right channel are the same in size; when the braided copper wire is positioned at the left part in the copper pipe, the left channel is smaller than the right channel; when the braided copper wire is positioned at the right part in the copper pipe, the left channel is larger than the right channel.
6. The method of claim 1, wherein the method comprises the steps of: in the fifth step, the high-temperature sintering temperature of the copper pipe is 800-980 ℃, and the sintering time is 2-3 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911406472.6A CN111043884A (en) | 2019-12-31 | 2019-12-31 | Method for manufacturing thin composite heat pipe of mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911406472.6A CN111043884A (en) | 2019-12-31 | 2019-12-31 | Method for manufacturing thin composite heat pipe of mobile phone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147422A (en) * | 2021-11-18 | 2022-03-08 | 中山市洛丝特电子科技有限公司 | Ultrathin tube processing technology of mandrel-free and shrinkage-free hose |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010047859A1 (en) * | 1997-12-08 | 2001-12-06 | Yoshio Ishida | Heat pipe and method for processing the same |
| CN201488619U (en) * | 2009-07-08 | 2010-05-26 | 锘威科技(深圳)有限公司 | Heat-conducting pipe |
| CN102243030A (en) * | 2010-05-14 | 2011-11-16 | 富瑞精密组件（昆山）有限公司 | Flat heat conduction pipe and method for manufacturing same |
| CN108827049A (en) * | 2018-07-04 | 2018-11-16 | 江苏凯唯迪科技有限公司 | A kind of flat heat pipe and preparation method thereof |
| CN109708500A (en) * | 2018-11-20 | 2019-05-03 | 苏州天脉导热科技股份有限公司 | Ultrathin heat pipe and its port sealing technique |
-
2019
- 2019-12-31 CN CN201911406472.6A patent/CN111043884A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010047859A1 (en) * | 1997-12-08 | 2001-12-06 | Yoshio Ishida | Heat pipe and method for processing the same |
| CN201488619U (en) * | 2009-07-08 | 2010-05-26 | 锘威科技(深圳)有限公司 | Heat-conducting pipe |
| CN102243030A (en) * | 2010-05-14 | 2011-11-16 | 富瑞精密组件（昆山）有限公司 | Flat heat conduction pipe and method for manufacturing same |
| CN108827049A (en) * | 2018-07-04 | 2018-11-16 | 江苏凯唯迪科技有限公司 | A kind of flat heat pipe and preparation method thereof |
| CN109708500A (en) * | 2018-11-20 | 2019-05-03 | 苏州天脉导热科技股份有限公司 | Ultrathin heat pipe and its port sealing technique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147422A (en) * | 2021-11-18 | 2022-03-08 | 中山市洛丝特电子科技有限公司 | Ultrathin tube processing technology of mandrel-free and shrinkage-free hose |
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Application publication date: 20200421 |
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