CN100398849C - Ceramic shaft and its manufacturing method - Google Patents
Ceramic shaft and its manufacturing method Download PDFInfo
- Publication number
- CN100398849C CN100398849C CNB2004100307336A CN200410030733A CN100398849C CN 100398849 C CN100398849 C CN 100398849C CN B2004100307336 A CNB2004100307336 A CN B2004100307336A CN 200410030733 A CN200410030733 A CN 200410030733A CN 100398849 C CN100398849 C CN 100398849C
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- Prior art keywords
- shaft
- ceramic powder
- porcelain shaft
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- ceramic
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- 239000000919 ceramic Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 229910052573 porcelain Inorganic materials 0.000 claims description 53
- 210000001161 mammalian embryo Anatomy 0.000 claims description 15
- 230000008602 contraction Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004663 powder metallurgy Methods 0.000 abstract description 4
- 238000003672 processing method Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 description 7
- 239000000314 lubricant Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a ceramic shaft and a fabrication method thereof. The present invention can easily enables an oil-bearing space to be formed between a fabricated ceramic shaft and a shaft sleeve after the fabricated ceramic shaft is installed on the shaft sleeve by the fabrication technology of powder metallurgy. The ceramic shaft disclosed by the present invention is a ceramic shaft having different diameters in different positions in an axial direction, which is prepared by that a rough blank of the ceramic shaft has different density in different section positions by the processing method of extruding ceramic powder, and ceramic powder in different sections can be contracted at different degrees by sintering treatment. The oil-bearing space can be formed after the ceramic shaft is installed on the shaft sleeve, which is helpful to reduce friction resistance between the ceramic shaft and the wall surface of the inner side of the shaft sleeve.
Description
Technical field
The present invention relates to a kind of porcelain shaft and manufacture method thereof, particularly a kind of cooperation axle sleeve uses, and can be in the porcelain shaft and the manufacture method thereof that form each other between a petroleum province.
Background technique
Be used for the easily fan of heat-generating electronic elements such as microprocessor at present, for better heat radiation function is provided, so its rotating speed constantly promotes, the fan of traditional use metal shaft is faced with many challenges under high rotating speed, main cause is that the high speed rotating action can cause the metal shaft shortening in working life, therefore, the porcelain shaft of being made by stupalith is substituted gradually, the fan that utilizes the characteristic of hard, the wear-resisting and heat resistanceheat resistant of ceramic material own to improve with the reply rotating speed, and then reach the purpose of enough heat radiations.
For example, the utility model patent of TaiWan, China is announced No. 285375 " the improvement structure of fan motor ", this patent has disclosed a kind of by Ceramic shaft sleeve and be set in the rotational structure that ceramic axostylus axostyle constituted of this axle sleeve, and defines the surface roughness of axle sleeve and axostylus axostyle; Still need to add the generation that lubricant oil could reduce friction noise and reduce heat energy between its Intermediate shaft sleeve and the axostylus axostyle, yet, area of contact between axle sleeve and the axostylus axostyle is excessive, still may be because frictional force is excessive, or the viscous effect of lubricant oil and rotate not smooth, moreover, because its area of contact contains the surface of whole circumference, the dust particle that enters therebetween is difficult for discharging, and therefore also may block and can't rotate because of the gathering of particulate, relative area of contact is big more, just needs more lubricating oil lubricated.
There is the artificer to propose TaiWan, China patent announcement No. 427592 " supporting construction of rotor " and No. 495118 " supporting construction of rotor append (one) " thereafter, above-mentioned patent all is to reduce the area of contact of ceramic axostylus axostyle and axle sleeve, to be its major technique means; In fact the area of contact that reduces ceramic axostylus axostyle and axle sleeve is a kind of quite basic notion, common people all can understand this principle place, which kind of focus on technological means reaching this purpose with, if with the pottery is that substrate forming goes out axostylus axostyle or axle sleeve, cut again or processing such as grinding improves the words of its shape, quite difficult on concrete enforcement, it mainly is because with regard to the physical property aspect of stupalith, stupalith hardness and brittleness are higher, removing material with external force is difficult for, again with regard to the processing technique face, the off-centre that porcelain shaft produces because of small tolerance in grinding process will influence the rotation status of total, so, it is the simplest and easy to be able to utilization, the technology contents of least cost to reduce the area of contact of ceramic axostylus axostyle and axle sleeve, is an important technological problems to be solved by this invention.
Summary of the invention
Main purpose of the present invention is to provide a kind of method of making porcelain shaft.
The porcelain shaft that foundation technology of the present invention is made, its profile near the size and the shape of final products, only needs slightly finishing to finish haply, does not need to remake in addition the operation of cutting, on manufacturing process, save time and can reduce cost, can increase economic efficiency.
Another object of the present invention is to provide a kind of can use with the axle sleeve collocation, and is forming between porcelain shaft and the axle sleeve between a petroleum province, to reduce the frictional resistance of axle center and axle sleeve interior sidewall surface, reaches the porcelain shaft smoothly that turns round.
The technological means that the present invention is disclosed, mean in the powder metallurgy manufacture process of porcelain shaft, means by the extruding ceramic powder, a kind ofly has the thick embryo of porcelain shaft that different densities distributes and form at different section positions, the thick embryo of this porcelain shaft is again through sintering, making wherein, the ceramic powder of different sections produces different contractions, just can form and a kind ofly have the porcelain shaft of different-diameter at the diverse location place of axial direction, make porcelain shaft after being installed on axle sleeve can and axle sleeve between have between a petroleum province.
Description of drawings
Fig. 1 is used for the structural drawing of fan for porcelain shaft of the present invention.
The schematic representation that Fig. 2 pushes in mould for ceramic powder.
Fig. 3 shows that ceramic powder forms the thick embryo of porcelain shaft with different densities distribution at different section positions after pushing.
Fig. 4 shows that the thick embryo of porcelain shaft neutral position behind sintering is punctured into the structure of the porcelain shaft of constriction shape.
Fig. 5 shows the situation that porcelain shaft that the neutral position is punctured into the constriction shape is carried out the external form finishing.
Fig. 6 is installed on axle sleeve for the disclosed porcelain shaft of the present invention, and between forms the section of structure between a petroleum province.
Embodiment
Relevant the preferred embodiments of the present invention and detailed technology content are as follows referring now to description of drawings.
The porcelain shaft that the present invention is disclosed, be specially adapted to high-revolving fan, as shown in Figure 1, one end of porcelain shaft 20 is linked to the shaft core position of an electric fan 10, this porcelain shaft 20 is installed in the axis hole 31 at an axle sleeve 30 centers, form 50 (see figure 6)s between a petroleum province,, and reduce thermal friction and improve running efficiency with the surface friction drag between minimizing porcelain shaft 20 and the axle sleeve 30.
And porcelain shaft 20 of the present invention is mainly made by following manner, and it step that comprises has:
Prepare ceramic powder;
Prepare the mould of a hollow tubular;
In this mould, insert ceramic powder;
Extruding generates the thick embryo of porcelain shaft, and this operation is to push the wherein ceramic powder of (the inside) from the two ends of this mould, makes the interior ceramic powder of mould be combined into the thick embryo of porcelain shaft of a shape;
Sintering to the thick embryo heating of the porcelain shaft of this shape, makes the wherein different contraction of ceramic powder generation of different sections, and forms a kind of porcelain shaft that has different-diameter at the diverse location place of axial direction.
Below with regard to a preferred embodiment its manufacture process is described.
See also Fig. 2 and Fig. 3, it shows the part processing procedure of making porcelain shaft 20 of the present invention, and wherein porcelain shaft 20 is to utilize the processing method manufacturing of powder metallurgy; In course of working, the present invention inserts ceramic powder 60 one among being the mould 40 of hollow tubular, utilize piston 41a, 41b extruding ceramic powder 60 wherein then at the two ends of mould 40, owing to have the gap between the molecule of pulverous ceramic powder 60, so after being squeezed,, will make ceramic powder 60 after extruding, form a kind of thick embryo 21 (see figure 3)s of porcelain shaft that have the different densities distribution at different section positions because of the dispersion of propagation of pressure.
Then the thick embryo 21 of this porcelain shaft is carried out sintering, because the ceramic powder 60 at different section positions has different density profile, the density higher (the intergranular gap that in other words is exactly ceramic powder 60 is less) at place, particularly close axially two ends, otherwise relatively can be lower in density near axial central position, so after sintering, can cause different contraction states at axial diverse location place, the necking phenomenon that makes the diameter dimension of formed porcelain shaft 20 after knot is finished all have trace produces, especially near the necking phenomenon of axial central position C with respect to the more obvious (see figure 4) of axial two ends person.
The porcelain shaft 20 of making by this powder metallurgy forming method, the mode of size (as the internal diameter of mould 40) that must be by control mould 40 in the process of making is guaranteed after the mean outside diameter D (see figure 4) of the thick embryo 21 of the porcelain shaft of sinter molding still is slightly larger than the outside diameter d of final porcelain shaft 20.Then more as shown in Figure 5, the mode of utilizing glaze wheel 80 to grind, the external diameter of the thick embryo 21 of finishing porcelain shaft slightly just can reach predetermined outside dimension d.
At last, the porcelain shaft of finishing 20 is used (as shown in Figure 6) with an axle sleeve 30 again, the outer wall at constriction place, porcelain shaft 20 stage casing 201 will and the internal face 32 of axle sleeve 30 between form between a petroleum province 50, can be covered with between whole petroleum province 50 for lubricant oil, help lubricated smooth and easy when rotating of porcelain shaft 20 and axle sleeve 30, and the surface friction drag between minimizing porcelain shaft 20 and the axle sleeve 30.
Above-described content, only be the preferred embodiments of the present invention, those of ordinary skill in the art, after understanding technological scheme of the present invention, natural energy is according to the needs of reality, in the variation of under the guiding of the present invention so-called section being expanded or doing to arrange, to obtain the porcelain shaft of different profiles.Therefore, every equivalent variations and modification of doing according to the scope of patent application of the present invention, the scope that all belongs to patent of the present invention and contained.
Claims (4)
1. porcelain shaft, diverse location place at its axial direction has different-diameter, it is characterized in that: the profile of described porcelain shaft (20) is handled and is formed in its axial distribution density decision and through described ceramic powder (60) being carried out sintering process by ceramic powder (60), described porcelain shaft (20) is higher in the density of the ceramic powder of locating near its axial two ends (60), and relatively low in the density near its axial central position.
2. method of making porcelain shaft according to claim 1 is characterized in that comprising following manufacturing step:
Prepare ceramic powder (60);
Prepare the mould (40) of a hollow tubular;
In described mould (40), insert ceramic powder (60);
Extruding generates the thick embryo of porcelain shaft (21), and this operation is the two ends extruding ceramic powder (60) wherein from described mould (40), makes the interior ceramic powder (60) of mould (40) be combined into the thick embryo of porcelain shaft (21) of a shape;
Sintering to the thick embryo of porcelain shaft (21) heating of described axle shape, makes the wherein different contraction of the ceramic powder of different sections (60) generation, and forms a kind of porcelain shaft (20) that has different-diameter at the diverse location place of axial direction.
3. method according to claim 2 is characterized in that the thick embryo of described porcelain shaft (21) is higher in the density near the ceramic powder (60) at its place, axial two ends, and relatively low in the density near the ceramic powder of its axial central position.
4. method according to claim 2 is characterized in that also comprising the step of the external diameter of the described porcelain shaft of a cutting down (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100307336A CN100398849C (en) | 2004-03-31 | 2004-03-31 | Ceramic shaft and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100307336A CN100398849C (en) | 2004-03-31 | 2004-03-31 | Ceramic shaft and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1676955A CN1676955A (en) | 2005-10-05 |
| CN100398849C true CN100398849C (en) | 2008-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100307336A Expired - Fee Related CN100398849C (en) | 2004-03-31 | 2004-03-31 | Ceramic shaft and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100398849C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748380B (en) * | 2012-07-06 | 2015-04-15 | 东南大学 | High-speed water bearing structure with micro-arc oxidation film layer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070361A (en) * | 1992-06-06 | 1993-03-31 | 佛山市陶瓷研究所 | Static pressure process of ceramic roll formation and shaping mould thereof |
| CN1086591A (en) * | 1992-10-31 | 1994-05-11 | 中南工业大学 | Booster thrust bearing produced by powder metallurgy process |
| CN2360658Y (en) * | 1999-02-26 | 2000-01-26 | 廖文雄 | Support structure of rotation body |
| CN1279150A (en) * | 2000-06-08 | 2001-01-10 | 黄安基 | Method and equipment for forming ceramic parts |
| US6223437B1 (en) * | 1997-09-05 | 2001-05-01 | Maxon Motor Gmbh | Method for fabricating a friction bearing, and friction bearing |
| CN2530076Y (en) * | 2001-12-17 | 2003-01-08 | 宋宽宽 | Rotary supporting structure of heat radiation fan |
-
2004
- 2004-03-31 CN CNB2004100307336A patent/CN100398849C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070361A (en) * | 1992-06-06 | 1993-03-31 | 佛山市陶瓷研究所 | Static pressure process of ceramic roll formation and shaping mould thereof |
| CN1086591A (en) * | 1992-10-31 | 1994-05-11 | 中南工业大学 | Booster thrust bearing produced by powder metallurgy process |
| US6223437B1 (en) * | 1997-09-05 | 2001-05-01 | Maxon Motor Gmbh | Method for fabricating a friction bearing, and friction bearing |
| CN2360658Y (en) * | 1999-02-26 | 2000-01-26 | 廖文雄 | Support structure of rotation body |
| CN1279150A (en) * | 2000-06-08 | 2001-01-10 | 黄安基 | Method and equipment for forming ceramic parts |
| CN2530076Y (en) * | 2001-12-17 | 2003-01-08 | 宋宽宽 | Rotary supporting structure of heat radiation fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1676955A (en) | 2005-10-05 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080702 |