CN110303298B - Composite capillary core hot column forming method - Google Patents
Composite capillary core hot column forming method Download PDFInfo
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- CN110303298B CN110303298B CN201910591671.2A CN201910591671A CN110303298B CN 110303298 B CN110303298 B CN 110303298B CN 201910591671 A CN201910591671 A CN 201910591671A CN 110303298 B CN110303298 B CN 110303298B
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- pipe
- pipe body
- sintering
- copper
- bottom 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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- 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
Abstract
The invention discloses a method for forming a composite capillary core hot column, which comprises the following steps: step one; manufacturing a pipe body; sintering a capillary layer of the copper powder; step three, laying a copper net, step four, installing a spring; step six, opening holes; sixthly, assembling and welding, and seventhly, degassing and sealing; step eight, polishing and forming; according to the invention, the pipe body is formed by stamping, the pipe body and the upper cover are integrally formed, the production efficiency is high, the airtightness is improved, the production cost is saved, the bottom plate and the pipe body are subjected to rotary arc welding, when the capillary core in the pipe body is not influenced, the firm welding can be realized, the welding quality is ensured, and when the air in the hot column is completely exhausted by using a melting method, the copper pipe is sealed by melting, so that the vacuum degree in the hot column can be greatly improved.
Description
Technical Field
The invention relates to the technical field of hot column forming, in particular to a method for forming a composite capillary core hot column.
Background
The heat pipe with heat column and heat pipe with short and thick end surface is one efficient heat transferring device with axial heat transferring efficiency over hundreds times that of pure copper and is called as heat superconductor, so that during the manufacture of heat column, the heat column is assembled and welded to form complicated manufacture process, poor sealing performance and high production cost.
Disclosure of Invention
The invention aims to provide a method for forming a composite capillary wick heat column, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the composite capillary core hot column forming method comprises a bottom plate, a pipe body, a small vacuumizing pipe and a capillary structure inside a cavity, wherein the capillary structure inside the cavity is manufactured by sintering copper powder, the bottom plate is fixed at the bottom of the pipe body through rotary welding, the small vacuumizing pipe is arranged on the side wall of the bottom of the pipe body, a copper pipe is arranged at the small vacuumizing pipe, and the pipe body is of a stamping integrated structure;
the hot column forming method comprises the following steps: step one; manufacturing a pipe body; sintering a capillary layer of the copper powder; step three, laying a copper net, step four, installing a spring; step six, opening holes; sixthly, assembling and welding, and seventhly, degassing and sealing; step eight, polishing and forming;
in the first step, manufacturing a corresponding die according to a design drawing for manufacturing the pipe body, and obtaining the pipe body through a stamping process;
in the second step, coating a layer of resin on the surface side of the inner wall of the tube body, using a funnel to shake and load the electrolytic copper powder with proper dendritic mesh number, so that the copper powder is uniformly distributed in the tube body, putting the tube body into a sintering furnace to be sintered, wherein the sintering temperature is 750 ℃, and sintering is carried out for 30 min;
in the third step, after sintering, coating a layer of resin on the surface side of the inner wall of the tube body, fixing a layer of copper mesh, vibrating by using a funnel again, filling electrolytic copper powder with proper dendritic mesh number, and sintering in a sintering furnace at the sintering temperature of 750 ℃ for 20 min;
in the fourth step, after sintering, a spring is arranged in the tube body, and the outer side of the spring is tangent to the inner wall of the tube body;
in the fifth step, after the spring is installed, a threaded hole with the diameter of 2mm is formed in the side wall of the pipe body, and a copper pipe is installed in a matching mode;
in the sixth step, the pipe body and the bottom plate are respectively fixed on a rotary clamp, the positions of the pipe body and the bottom plate are adjusted, then the pipe body and the bottom plate are extruded in a rotating mode, and assembly is completed through rotating arc welding;
in the seventh step, a valve is arranged on the copper pipe in the sixth step, after air in the pipe body is exhausted by using an exhaust pump, the valve is closed, one end of the copper pipe is extruded, and meanwhile, hot melting is carried out, so that the copper pipe carrying the valve is cut off, and the copper pipe at one end of the pipe body is sealed by hot melting;
in the eighth step, after the tube body and the bottom plate are polished, the formation of the heat column is completed.
According to the technical scheme, in the fifth step, the diameter of the copper pipe is 2 mm.
According to the technical scheme, step five, the bottom at the body is seted up to the screw hole.
According to the technical scheme, in the sixth step, after welding is finished, a sealing test is required, and after the welding is qualified, the next step is continued.
According to the technical scheme, in the seventh step, during vacuum exhaust, a method of multiple cycles of evacuation exhaust, pause, oscillation, re-vacuum exhaust, pause again and oscillation again is needed.
According to the technical scheme, in the sixth step, before assembly, copper powder is uniformly paved on the bottom side of the bottom plate and placed in a sintering furnace for sintering.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the pipe body is formed by stamping, the pipe body and the upper cover are integrally formed, the production efficiency is high, the airtightness is improved, the production cost is saved, the bottom plate and the pipe body are subjected to rotary arc welding, when the capillary core in the pipe body is not influenced, the firm welding can be realized, the welding quality is ensured, and when the air in the hot column is completely exhausted by using a melting method, the copper pipe is sealed by melting, so that the vacuum degree in the hot column can be greatly improved.
Drawings
FIG. 1 is a flow chart of the forming method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a composite capillary core hot column forming method comprises a bottom plate, a pipe body, a small vacuumizing pipe and a capillary structure in a cavity, wherein the capillary structure in the cavity is manufactured by sintering copper powder in the pipe body;
the hot column forming method comprises the following steps: step one; manufacturing a pipe body; sintering a capillary layer of the copper powder; step three, laying a copper net, step four, installing a spring; step six, opening holes; sixthly, assembling and welding, and seventhly, degassing and sealing; step eight, polishing and forming;
in the first step, manufacturing a corresponding die according to a design drawing for manufacturing the pipe body, and obtaining the pipe body through a stamping process;
in the second step, coating a layer of resin on the surface side of the inner wall of the tube body, using a funnel to shake and load the electrolytic copper powder with proper dendritic mesh number, so that the copper powder is uniformly distributed in the tube body, putting the tube body into a sintering furnace to be sintered, wherein the sintering temperature is 750 ℃, and sintering is carried out for 30 min;
in the third step, after sintering, coating a layer of resin on the surface side of the inner wall of the tube body, fixing a layer of copper mesh, vibrating by using a funnel again, filling electrolytic copper powder with proper dendritic mesh number, and sintering in a sintering furnace at the sintering temperature of 750 ℃ for 20 min;
in the fourth step, after sintering, a spring is arranged in the tube body, and the outer side of the spring is tangent to the inner wall of the tube body;
in the fifth step, after the spring is installed, a threaded hole with the diameter of 2mm is formed in the side wall of the tube body, a copper tube is installed in a matched mode, the diameter of the copper tube is 2mm, and the threaded hole is formed in the bottom end of the tube body;
respectively fixing the pipe body and the bottom plate on a rotary fixture, adjusting the positions of the pipe body and the bottom plate, then rotationally extruding the pipe body and the bottom plate, completing assembly through rotational arc welding, uniformly paving copper powder on the bottom side of the bottom plate before assembly, sintering in a sintering furnace, performing a sealing experiment after welding, and continuing the next step after the inspection is qualified;
in the seventh step, a valve is arranged on the copper pipe in the sixth step, after air in the pipe body is exhausted by using an exhaust pump, the valve is closed, one end of the copper pipe is extruded, and meanwhile, hot melting is carried out, so that the copper pipe carrying the valve is cut off, the copper pipe at one end of the pipe body is sealed in a hot melting way, and during vacuum exhaust, a method of evacuation exhaust, pause, oscillation, vacuum exhaust again, pause again, oscillation and multiple cycles is needed;
in the eighth step, after the tube body and the bottom plate are polished, the formation of the heat column is completed.
Based on the above, the invention has the advantages that the tube body is formed by stamping, the production efficiency of the integral forming of the tube body and the upper cover is high, the airtightness is improved, the production cost is saved, the copper mesh is arranged in the tube body, the copper mesh can be tightly contacted with the sintered copper powder capillary layer to form a freely combined capillary structure which can meet the required power, and the welding quality is ensured by more firmly welding the bottom plate and the tube body through rotary arc welding when the capillary core in the tube body is not influenced; when exhausting, the copper pipe is sealed by melting by using a melting method, so that the vacuum degree in the hot column can be greatly improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The composite capillary core hot column forming method comprises a bottom plate, a pipe body, a small vacuumizing pipe and a capillary structure inside a cavity, wherein the capillary structure inside the cavity is manufactured by sintering copper powder, the bottom plate is fixed at the bottom of the pipe body through rotary welding, the small vacuumizing pipe is arranged on the side wall of the bottom of the pipe body, a copper pipe is arranged at the small vacuumizing pipe, and the pipe body is of a stamping integrated structure;
the hot column forming method comprises the following steps: step one; manufacturing a pipe body; sintering a capillary layer of the copper powder; step three, laying a copper net, step four, installing a spring; step five, opening holes; sixthly, assembling and welding, and seventhly, degassing and sealing; step eight, polishing and forming; the method is characterized in that:
in the first step, manufacturing a corresponding die according to a design drawing for manufacturing the pipe body, and obtaining the pipe body through a stamping process; in the second step, coating a layer of resin on the surface side of the inner wall of the tube body, using a funnel to shake and load the electrolytic copper powder with proper dendritic mesh number, so that the copper powder is uniformly distributed in the tube body, putting the tube body into a sintering furnace to be sintered, wherein the sintering temperature is 750 ℃, and sintering is carried out for 30 min;
in the third step, after sintering, coating a layer of resin on the surface side of the inner wall of the tube body, fixing a layer of copper mesh, vibrating by using a funnel again, filling electrolytic copper powder with proper dendritic mesh number, and sintering in a sintering furnace at the sintering temperature of 750 ℃ for 20 min;
in the fourth step, after sintering, a spring is arranged in the tube body, and the outer side of the spring is tangent to the inner wall of the tube body;
in the fifth step, after the spring is installed, a threaded hole with the diameter of 2mm is formed in the side wall of the pipe body, and a copper pipe is installed in a matching mode;
fifthly, the threaded hole is formed in the bottom end of the pipe body;
in the sixth step, before assembly, copper powder is uniformly laid on the bottom side of the bottom plate and placed in a sintering furnace for sintering;
in the sixth step, the pipe body and the bottom plate are respectively fixed on a rotary clamp, the positions of the pipe body and the bottom plate are adjusted, then the pipe body and the bottom plate are extruded in a rotating mode, and assembly is completed through rotating arc welding;
in the seventh step, a valve is arranged on the copper pipe in the sixth step, after air in the pipe body is exhausted by using an exhaust pump, the valve is closed, one end of the copper pipe is extruded, and meanwhile, hot melting is carried out, so that the copper pipe carrying the valve is cut off, and the copper pipe at one end of the pipe body is sealed by hot melting;
in the eighth step, after the tube body and the bottom plate are polished, the formation of the heat column is completed.
2. A composite capillary wick heat column forming method according to claim 1, wherein: in the fifth step, the diameter of the copper pipe is 2 mm.
3. A composite capillary wick heat column forming method according to claim 1, wherein: in the sixth step, after welding, a sealing test is required, and after the welding is qualified, the next step is continued.
4. A composite capillary wick heat column forming method according to claim 1, wherein: in the seventh step, during vacuum exhaust, a method of evacuation exhaust, pause, oscillation, vacuum exhaust again, pause again, oscillation and multiple cycles is needed.
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| CN201910591671.2A CN110303298B (en) | 2019-07-02 | 2019-07-02 | Composite capillary core hot column forming method |
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| CN110303298A CN110303298A (en) | 2019-10-08 |
| CN110303298B true CN110303298B (en) | 2020-08-04 |
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| CN112179191A (en) * | 2020-09-29 | 2021-01-05 | 西安交通大学 | Flat-plate loop heat pipe suitable for two vertical heat sources |
Citations (3)
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| CN102410765A (en) * | 2011-10-28 | 2012-04-11 | 昆山德泰新材料科技有限公司 | Ultra-thin heat pipe of composite structure and manufacturing method thereof |
| CN104457350A (en) * | 2014-11-03 | 2015-03-25 | 大连理工大学 | Micro heat pipe packaging method with peristaltic pump adopted for pouring |
| CN107917632A (en) * | 2017-12-14 | 2018-04-17 | 东莞市合众导热科技有限公司 | A kind of composite type heat rod structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI296039B (en) * | 2006-06-02 | 2008-04-21 | Delta Electronics Inc | Heat dissipation module and heat column thereof |
| CN101846472B (en) * | 2010-05-05 | 2013-04-10 | 嘉善恒杰热管科技有限公司 | Manufacturing method of thermal column |
| CN106238725B (en) * | 2016-08-31 | 2018-10-16 | 昆山德泰新材料科技有限公司 | A kind of thermal conductivity copper powder and preparation method thereof of high wicking rate low-apparent-density |
| CN108645258A (en) * | 2018-05-05 | 2018-10-12 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of manufacturing method of NEW TYPE OF COMPOSITE plume |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410765A (en) * | 2011-10-28 | 2012-04-11 | 昆山德泰新材料科技有限公司 | Ultra-thin heat pipe of composite structure and manufacturing method thereof |
| CN104457350A (en) * | 2014-11-03 | 2015-03-25 | 大连理工大学 | Micro heat pipe packaging method with peristaltic pump adopted for pouring |
| CN107917632A (en) * | 2017-12-14 | 2018-04-17 | 东莞市合众导热科技有限公司 | A kind of composite type heat rod structure |
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