CN104422321B - Metal tube, flat plate type heat tube and manufacture method thereof - Google Patents
Metal tube, flat plate type heat tube and manufacture method thereof Download PDFInfo
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- CN104422321B CN104422321B CN201310370208.8A CN201310370208A CN104422321B CN 104422321 B CN104422321 B CN 104422321B CN 201310370208 A CN201310370208 A CN 201310370208A CN 104422321 B CN104422321 B CN 104422321B
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Abstract
The invention provides a kind of metal tube, flat plate type heat tube and manufacture method thereof.The manufacture method of this flat plate type heat tube comprises: provide a sidewall to comprise the metal tube of the arc area of at least two different curvature radius along cross-sectional direction; Plant along the rounded center bar of cross-sectional direction in metal tube, be less than gap width between the outer surface of center bar and the inner surface of another arc area to make the gap width between the inner surface of the outer surface of center bar and an arc area; At least between the outer surface and the inner surface of another arc area of center bar, fill agglomerated powder, and sintering forms the wick supporting structures be attached on the inner surface of another arc area; Extract center bar out, and extrusion metal pipe, form flat plate type heat tube.By the way, the present invention easily can extract center bar out after sintering, reduces its scrappage.
Description
Technical field
The present invention relates to electronic element radiating technical field, particularly relate to a kind of metal tube, flat plate type heat tube and manufacture method thereof.
Background technology
Whether the performance excellence of electronic product to be, depends on the speed of its calculation process, and the heat dissipation problem of electronic building brick, be namely the primary factor affecting its arithmetic speed.Therefore, need to install heat abstractor additional in electronic building brick and keep suitable operating temperature to make it, avoid overheated and affect even interrupt operation.
Current, generally adopt that to have heat conduction efficiency high and can repeatedly carry out inhaling the heat pipe of heat release as the heat abstractor of electronic building brick.This heat pipe injects working fluid in a kind of cavity sealing, and working fluid absorbs the heat of vaporization of electronic building brick generation at evaporation ends, is condensed into liquid, and again returns the quick conductive element of evaporation ends by the capillary force of wick supporting structures at condensation end.
Along the sectional view of cross-sectional direction when Fig. 1 is metal tube plant center bar in prior art.As shown in Figure 1, in the manufacture method of the heat pipe of prior art, the center bar 110 that generally to adopt along cross-sectional direction be flat type inserts in circular copper pipe 120, then in packing space A, B, fill the agglomerated powder for sintering formation wick supporting structures 131,132 as shown in Figure 2, and after sintering center bar 110 is extracted out, again by technique such as extruding (along the direction of arrow shown in Fig. 1), reducing etc., complete the manufacture with the heat pipe 100 of steam channel 141,142 as shown in Figure 2.
But the center bar 110 of above-mentioned prior art, because of larger with the contact area of wick supporting structures 131,132 when extracting out after sintering, cause friction larger, easily there is the problem of taking out rod difficulty, if take out rod by force, very easily damage center bar 110, cause its scrappage higher.
Therefore, be necessary to provide a kind of metal tube, flat plate type heat tube and manufacture method thereof, to solve the problem.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of metal tube, flat plate type heat tube and manufacture method thereof, easily can extract center bar out after sintering, reduces scrappage.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the manufacture method providing a kind of flat plate type heat tube, comprising: provide a metal tube, and the sidewall of metal tube comprises the arc area of at least two different curvature radius along cross-sectional direction; Plant along the rounded center bar of cross-sectional direction in metal tube, be less than gap width between the outer surface of center bar and the inner surface of another arc area to make the gap width between the inner surface of the outer surface of center bar and an arc area; At least between the outer surface and the inner surface of another arc area of center bar, fill agglomerated powder, and sintering forms the wick supporting structures be attached on the inner surface of another arc area; Extract center bar out, and extrusion metal pipe, to form flat plate type heat tube.
Wherein, fit each other between the outer surface of center bar and the inner surface of an arc area and arrange.
Wherein, be intervally installed between the inner surface of the outer surface of center bar and an arc area, to fill agglomerated powder between the outer surface and the inner surface of an arc area of center bar, and sintering formed be attached to an arc area inner surface on and thickness is less than the capillary attaching structure of wick supporting structures.
Wherein, the sidewall of metal tube comprises head and the tail in turn along cross-sectional direction and connects the first arc area, second arc area, 3rd arc area and the 4th arc area, first arc area and the 3rd arc area is oppositely arranged and its inner surface has first curvature radius, second arc area and the 4th arc area is oppositely arranged and its inner surface has second curvature radius, first curvature radius is greater than second curvature radius, and the distance between the arc top of the arc top of the first arc area and the 3rd arc area is less than the distance between the arc top of the second arc area and the arc top of the 4th arc area, gap width between the outer surface of center bar and the inner surface of the second arc area and the 4th arc area is less than to make the gap width between the inner surface of the outer surface of center bar and the first arc area and the 3rd arc area, and then agglomerated powder is filled between the outer surface and the inner surface of the second arc area and the 4th arc area of center bar, and then sintering forms the first wick supporting structures and the second wick supporting structures that are attached to respectively on the inner surface of the second arc area and the 4th arcuate segments.
Wherein, the first arc area, the 3rd arc area and center bar are arranged with one heart, to make the inner surface of the outer surface of center bar and the first arc area and the 3rd arc area fit to arrange or equi-spaced apart is arranged.
Wherein, at extraction center bar, and in the step of extrusion metal pipe: extrusion metal pipe, with the first major side wall making flat plate type heat tube comprise parallel interval setting, first connecting wall of the second major side wall and both connections respectively and the second connecting wall, wherein the first wick supporting structures to be attached in the first major side wall and to be connected to the second major side wall, second wick supporting structures to be attached in the second major side wall and to be connected to the first major side wall, between first wick supporting structures and the second wick supporting structures, steam channel is formed between first wick supporting structures and the first adjacent connecting wall and between the second wick supporting structures and the second adjacent connecting wall.
Wherein, the sidewall of metal tube comprises for connecting the first arc area and the first linear transition region of the second arc area and the second linear transition region for being connected the 3rd arc area and the 4th arc area further, wherein at extraction center bar, and in the step of extrusion metal pipe: extrusion metal pipe, with the zone line making the first linear transition region and the second linear transition region lay respectively at the first major side wall and the second major side wall.
Wherein, first arc area is directly connected with the 4th arc area, 3rd arc area is directly connected with the second arc area, wherein at the described center bar of extraction, and in the step of extrusion metal pipe: extrusion metal pipe, with the fringe region making the link position of the link position of the first arc area and the 4th arc area and the 3rd arc area and the second arc area lay respectively at the first major side wall and the second major side wall.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of flat plate type heat tube, and this flat plate type heat tube is made up of above-mentioned manufacture method.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is: provide a kind of metal tube for the manufacture of flat plate type heat tube, the sidewall of this metal tube comprises the arc area of at least two different curvature radius along cross-sectional direction, be less than gap width between the outer surface of center bar and the inner surface of another arc area to make the gap width between the outer surface of the center bar rounded along cross-sectional direction in plant metal tube and the inner surface of an arc area.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention comprises along cross-sectional direction at sidewall in the metal tube of the arc area of at least two different curvature radius and plants along the rounded center bar of cross-sectional direction, gap width between the outer surface of center bar and the inner surface of another arc area is less than to make the gap width between the inner surface of the outer surface of center bar and an arc area, then at least between the outer surface and the inner surface of another arc area of center bar, agglomerated powder is filled, and sintering forms the wick supporting structures be attached on the inner surface of another arc area, finally extract center bar out, and extrusion metal pipe, form flat plate type heat tube.Known, the contact area of center bar and wick supporting structures is less after sintering, and the frictional force both when making to take out rod is less, thus easily extracts center bar out, and reduces its scrappage.
Accompanying drawing explanation
Along the sectional view of cross-sectional direction when Fig. 1 is metal tube plant center bar in prior art;
Fig. 2 be in prior art heat pipe along the sectional view of cross-sectional direction;
Fig. 3 is the flow chart of the manufacture method of the flat plate type heat tube of first embodiment of the invention;
Fig. 4 be in the preferred embodiment of the present invention metal tube along the sectional view of cross-sectional direction;
Fig. 5 be metal tube shown in Fig. 4 plant the center bar of the first embodiment time along the sectional view of cross-sectional direction;
Fig. 6 is the sectional view of flat plate type heat tube along cross-sectional direction of first embodiment of the invention;
Fig. 7 be metal tube shown in Fig. 4 plant the center bar of the second embodiment time along the sectional view of cross-sectional direction;
Fig. 8 is the sectional view of flat plate type heat tube along cross-sectional direction of second embodiment of the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing 3 ~ 8 and embodiment, the present invention is described in detail.
Fig. 3 is the flow chart of the manufacture method of the flat plate type heat tube of first embodiment of the invention.As shown in Figure 3, the manufacture method of the flat plate type heat tube of the present embodiment comprises the following steps:
Step S310: provide a metal tube, the sidewall of this metal tube comprises the arc area of at least two different curvature radius along cross-sectional direction.
Fig. 4 is the sectional view of metal tube along cross-sectional direction of the preferred embodiment of the present invention.Metal tube 410 of the present invention be by along the rounded metal tube of cross-sectional direction by after Pipe Cutting, cleaning, first time reducing and reducing process processing procedure, the integrated formed structure that the sidewall that precompressed is formed is seamless, the present embodiment preferable alloy pipe 410 is copper pipe.
As shown in Figure 4, the sidewall of metal tube 410 comprises along cross-sectional direction: the first arc area 411, second arc area 412, the 3rd arc area 413, the 4th arc area 414, first linear transition region 415 and the second linear transition region 416.
Wherein, the first arc area 411 is relative with the 3rd arc area 413 and arrange with one heart, and both inner surfaces have first curvature radius r1, and the distance between arc top is h1.Second arc area 412 and the 4th arc area 414 are oppositely arranged, and both inner surfaces have second curvature radius r2, and the distance between arc top is h2.In the present embodiment, first curvature radius r1 is greater than second curvature radius r2, and h1 is less than h2.
First linear transition region 415 is for connecting the first arc area 411 and the second arc area 412, second linear transition region 416 is for connecting the 3rd arc area 413 and the 4th arc area 414, first arc area 411 is directly connected with the 4th arc area 414, second arc area 412 is directly connected with the 3rd arc area 413, thus the first arc area 411, second arc area 412, the 3rd arc area 413 and the 4th arc area 414 are connected in turn from beginning to end.
Should be understood that in other embodiments, also can set up linear transition region between the first arc area 411 and the 4th arc area 414, and set up linear transition region between the second arc area 412 and the 3rd arc area 413.
Step S320: plant along the rounded center bar of cross-sectional direction in metal tube, is less than gap width between the outer surface of center bar and the inner surface of another arc area to make the gap width between the inner surface of the outer surface of center bar and an arc area.
Fig. 5 be metal tube shown in Fig. 4 plant the center bar of the first embodiment time along the sectional view of cross-sectional direction.As shown in Figure 5, center bar 500 is rounded along cross-sectional direction, and radius is r3 and r3 is less than the first curvature radius r1 that the first arc area 411 and the 3rd arc area 413 have.At plunger manufacturing process, namely center bar 500 be inserted in metal tube 410 and fixing after, center bar 500 and the first arc area 411 and the 3rd arc area 413 is concentric arranges, and the inner surface of its outer surface and the first arc area 411 and the 3rd arc area 413 is intervally installed, gap width is d1, be intervally installed with the inner surface of the second arc area 412 and the 4th arc area 414, gap width is d2 simultaneously.Wherein, d2 is greater than d1.
The present embodiment preferred center rod 500 is ceramic rod.In other embodiments, those skilled in the art can select the center bar of unlike material according to actual needs, only need it rounded along cross-sectional direction, and easily extract out after sintering.
Step S330: at least fill agglomerated powder between the outer surface and the inner surface of another arc area of center bar, and sintering forms the wick supporting structures be attached on the inner surface of another arc area.
Agglomerated powder is poured in the metal tube 410 shown in Fig. 5, and make the interval region of its uniform filling between the outer surface and the inner surface of metal tube 410 of center bar 500 (that is, the outer surface of center bar 500 and the first arc area 411, second arc area 412, interval region between the 3rd arc area 413 and the inner surface of the 4th arc area 414).
Then carry out sintering process processing procedure, shown in Figure 6 with the second wick supporting structures 432(be attached on the 4th arc area 414 to form the first wick supporting structures 431 be attached on the second arc area 412), and the capillary attaching structure 433(be attached on the inner surface of metal tube 410 is shown in Figure 6).Wherein, the thickness of capillary attaching structure 433 is less than the thickness of the first wick supporting structures 431 and the second wick supporting structures 432.
Should understand, in other embodiments, also agglomerated powder can be filled in the interval region between the outer surface of center bar 500 and the inner surface of the first arc area 411 and the 3rd arc area 413 in step s 320, thus after sintering process processing procedure, only form the first wick supporting structures 431 be attached on the second arc area 412 and the second wick supporting structures 432 be attached on the 4th arc area 414.
The preferred agglomerated powder of the present embodiment is copper powder.In other embodiments, those skilled in the art also can select the metal powder that the metal powder of other materials or copper, aluminium etc. mix in proportion.In addition, in agglomerated powder, the purity of copper powder, copper powder monomer particle diameter and concrete sintering process can consult prior art, do not repeat herein.
Step S340: extract center bar out, and extrusion metal pipe, to form flat plate type heat tube.
After sintering process processing procedure completes, extract center bar 500 out, apply the extruding force of first direction and second direction (in figure shown in arrow) in the first linear transition region 415 and the second linear transition region 416 correspondence, with extrusion metal pipe 420 and the flat plate type heat tube 600 formed as shown in Figure 6 simultaneously.Wherein, first direction is contrary with second direction.
As shown in Figure 6, the flat plate type heat tube 600 after extruding formation comprises the first major side wall 610, second major side wall 620 of parallel interval setting and the first connecting wall 630 and the second connecting wall 640 of both connections respectively.
Wherein, first wick supporting structures 431 is attached in the first major side wall 610 and capillary attaching structure 433, second wick supporting structures 432 be connected in the second major side wall 620 to be attached in the second major side wall 620 and the capillary attaching structure 433 be connected in the first major side wall 610.Certainly, in other embodiments not forming capillary attaching structure 433, the first wick supporting structures 431 is connected to the second major side wall 620, second wick supporting structures 432 and is connected to the first major side wall 610.
Simultaneously, steam channel 651 is formed between first wick supporting structures 431 of the present embodiment and the second wick supporting structures 432, form steam channel 652 between first wick supporting structures 431 and the first adjacent connecting wall 630, between the second wick supporting structures 432 and the second adjacent connecting wall 640, form steam channel 653.
It should be noted that, be compared to Fig. 5, now the first linear transition region 415 is positioned at the zone line of the first major side wall 610, and the second linear transition region 416 is positioned at the zone line of the second major side wall 620.The link position of the first arc area 411 and the 4th arc area 414 is positioned at the fringe region of the first major side wall 610, and the link position of the 3rd arc area 413 and the second arc area 412 is positioned at the fringe region of the second major side wall 620.
The present invention also provides the manufacture method of the flat plate type heat tube of the second embodiment, it is described in detail on the basis of the first embodiment, difference is: as shown in Figure 7, and the radius r 4 of the center bar 700 of the present embodiment is equal with the first curvature radius r1 that the first arc area 411 and the 3rd arc area 413 have.
Metal tube 410 plant center bar time, namely the plunger manufacturing process of the step S320 of the first embodiment is corresponded to, center bar 700 along cross-sectional direction rounded and be inserted in metal tube 410 and fixing after, the outer surface of center bar 700 and the inner surface of the first arc area 411 and the 3rd arc area 413 are fitted each other and are arranged.Meanwhile, the outer surface of center bar 700 forms packing space C, D with corresponding respectively between the second arc area 412 and the inner surface of the 4th arc area 414.
Then in the sintering process processing procedure of step S330 corresponding to the first embodiment, agglomerated powder is poured in the metal tube 410 shown in Fig. 7, and make its uniform filling in packing space C, D, by sintering with formed be attached to the first wick supporting structures 431 of the sidewall of metal tube 410 and the second wick supporting structures 432(shown in Figure 8).
Wherein, the first wick supporting structures 431 to be attached in the first major side wall 610 and to be connected to the second major side wall 620, second wick supporting structures 432 and to be attached in the second major side wall 620 and to be connected to the first major side wall 610.
Adopt the flat plate type heat tube as shown in Figure 8 800 that the method for the present embodiment manufactures, because its inner surface is only attached with the first wick supporting structures 431 and the second wick supporting structures 432, therefore its integral thickness is less, is applicable to thin radiating device.And adopt the flat plate type heat tube 600 that the method for the first embodiment manufactures, because its inner surface is not only attached with the first wick supporting structures 431 and the second wick supporting structures 432, but also be attached with capillary attaching structure 433, therefore its entirety is compared to flat plate type heat tube 800 thickness comparatively greatly, is applicable to thicker heat abstractor.
Based on above-mentioned known, the first embodiment of the present invention is after sintering process processing procedure, center bar 500 and between the first wick supporting structures 431, second wick supporting structures 432 and capillary attaching structure 433, and second embodiment after sintering process processing procedure, center bar 700 and between the first wick supporting structures 431 and the second wick supporting structures 432, be compared to prior art contact area all less, thus make center bar and capillary structure frictional force each other less, easy extraction center bar, and reduce its scrappage.In addition, flat plate type heat tube 600,800 of the present invention is when rolling process processing procedure, and the direction of applying extruding force and the structure of metal tube unlike the prior art, thus can form three steam channels.
In addition, present invention also offers a kind of flat plate type heat tube and the metal tube for the manufacture of this flat plate type heat tube.This metal base in the metal tube 410 of above-described embodiment, this flat plate type heat tube based on above-described embodiment manufacture method and obtain, therefore there is with above-described embodiment identical beneficial effect, specifically see above-mentioned, repeat no more herein.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a manufacture method for flat plate type heat tube, is characterized in that, described manufacture method comprises:
One metal tube is provided, the sidewall of described metal tube comprises head and the tail in turn along cross-sectional direction and connects the first arc area, second arc area, 3rd arc area and the 4th arc area, wherein said first arc area and described 3rd arc area is oppositely arranged and its inner surface has first curvature radius, described second arc area and described 4th arc area is oppositely arranged and its inner surface has second curvature radius, described first curvature radius is greater than described second curvature radius, and the distance between the arc top of the arc top of described first arc area and described 3rd arc area is less than the distance between the arc top of described second arc area and the arc top of described 4th arc area,
Plant along the rounded center bar of cross-sectional direction in described metal tube, be less than gap width between the outer surface of described center bar and the inner surface of described second arc area and described 4th arc area to make the gap width between the inner surface of the outer surface of described center bar and described first arc area and described 3rd arc area;
Between the outer surface and the inner surface of described second arc area and described 4th arc area of described center bar, fill agglomerated powder, and sintering forms the first wick supporting structures and the second wick supporting structures that are attached to respectively on the inner surface of described second arc area and described 4th arcuate segments;
Extract described center bar out, and extrude described metal tube, to form described flat plate type heat tube.
2. manufacture method according to claim 1, it is characterized in that, described first arc area, described 3rd arc area and described center bar are arranged with one heart, to make the inner surface of the outer surface of described center bar and described first arc area and described 3rd arc area fit to arrange or equi-spaced apart is arranged.
3. manufacture method according to claim 2, is characterized in that, at the described center bar of described extraction, and extrudes in the step of described metal tube:
Extrude described metal tube, with the first major side wall making described flat plate type heat tube comprise parallel interval setting, first connecting wall of the second major side wall and both connections respectively and the second connecting wall, wherein said first wick supporting structures to be attached in described first major side wall and to be connected to described second major side wall, described second wick supporting structures to be attached in described second major side wall and to be connected to described first major side wall, between described first wick supporting structures and described second wick supporting structures, steam channel is formed between described first wick supporting structures and the first adjacent connecting wall and between described second wick supporting structures and adjacent described second connecting wall.
4. manufacture method according to claim 3, it is characterized in that, the sidewall of described metal tube comprises for connecting described first arc area and the first linear transition region of described second arc area and the second linear transition region for being connected described 3rd arc area and described 4th arc area further, wherein at the described center bar of described extraction, and extrude in the step of described metal tube:
Extrude described metal tube, with the zone line making described first linear transition region and described second linear transition region lay respectively at described first major side wall and described second major side wall.
5. manufacture method according to claim 4, it is characterized in that, described first arc area is directly connected with described 4th arc area, and described 3rd arc area is directly connected with described second arc area, wherein at the described center bar of described extraction, and extrude in the step of described metal tube:
Extrude described metal tube, with the fringe region making the link position of the link position of described first arc area and described 4th arc area and described 3rd arc area and described second arc area lay respectively at described first major side wall and described second major side wall.
6. a flat plate type heat tube, is characterized in that, described flat plate type heat tube is made up of the manufacture method described in claim 1-5 any one.
7. the metal tube for the manufacture of flat plate type heat tube, it is characterized in that, the sidewall of described metal tube comprises head and the tail in turn along cross-sectional direction and connects the first arc area, second arc area, 3rd arc area and the 4th arc area, wherein said first arc area and described 3rd arc area is oppositely arranged and its inner surface has first curvature radius, described second arc area and described 4th arc area is oppositely arranged and its inner surface has second curvature radius, described first curvature radius is greater than described second curvature radius, and the distance between the arc top of the arc top of described first arc area and described 3rd arc area is less than the distance between the arc top of described second arc area and the arc top of described 4th arc area, gap width between the outer surface of described center bar and the inner surface of described second arc area and described 4th arc area is less than to make the gap width between the inner surface of the outer surface of the center bar rounded along cross-sectional direction be inserted in described metal tube and described first arc area and described 3rd arc area.
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| CN201310370208.8A CN104422321B (en) | 2013-08-22 | 2013-08-22 | Metal tube, flat plate type heat tube and manufacture method thereof |
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| CN201310370208.8A CN104422321B (en) | 2013-08-22 | 2013-08-22 | Metal tube, flat plate type heat tube and manufacture method thereof |
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| CN101839663A (en) * | 2010-05-12 | 2010-09-22 | 锘威科技(深圳)有限公司 | Sintered flat plate heat pipe and manufacturing method thereof |
| CN101844297A (en) * | 2010-04-28 | 2010-09-29 | 锘威科技(深圳)有限公司 | Manufacturing method of heat pipe and heat pipe |
| CN102147201A (en) * | 2010-02-09 | 2011-08-10 | 昆山德泰新金属粉末有限公司 | Flat heat radiating pipe and manufacturing method thereof |
| CN102449423A (en) * | 2009-07-21 | 2012-05-09 | 古河电气工业株式会社 | Flattened heat pipe, and method for manufacturing the heat pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080142196A1 (en) * | 2006-12-17 | 2008-06-19 | Jian-Dih Jeng | Heat Pipe with Advanced Capillary Structure |
| TW201038896A (en) * | 2009-04-16 | 2010-11-01 | Yeh Chiang Technology Corp | Ultra-thin heat pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102449423A (en) * | 2009-07-21 | 2012-05-09 | 古河电气工业株式会社 | Flattened heat pipe, and method for manufacturing the heat pipe |
| CN102147201A (en) * | 2010-02-09 | 2011-08-10 | 昆山德泰新金属粉末有限公司 | Flat heat radiating pipe and manufacturing method thereof |
| CN101844297A (en) * | 2010-04-28 | 2010-09-29 | 锘威科技(深圳)有限公司 | Manufacturing method of heat pipe and heat pipe |
| CN101839663A (en) * | 2010-05-12 | 2010-09-22 | 锘威科技(深圳)有限公司 | Sintered flat plate heat pipe and manufacturing method thereof |
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