CN1190605C - Etching method used in manufacturing fluid bearing - Google Patents
Etching method used in manufacturing fluid bearing Download PDFInfo
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- CN1190605C CN1190605C CN 02147999 CN02147999A CN1190605C CN 1190605 C CN1190605 C CN 1190605C CN 02147999 CN02147999 CN 02147999 CN 02147999 A CN02147999 A CN 02147999A CN 1190605 C CN1190605 C CN 1190605C
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- several
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- fdb
- hollow cylindrical
- cylindrical wall
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Abstract
The present invention discloses an etching method used in manufacturing a fluid bearing, which is characterized in that a mandrel for spraying is used as a mask of bearing material; protecting material is filled in the inner diameter part of the fluid bearing to generate a protecting pattern; after the mandrel for spraying is pulled out, the bearing material is etched, and a desired oil channel is formed on the inner diameter part; finally, an etching solution is washed to remove the protecting pattern. The present invention is easy to integrate with the existing process, and accordingly, the efficiency of mass production and low cost is achieved. In addition, the present invention can avoid the problem that the existing processing technology can produce burrs, and can manufacture the radial part and the thrust part of the fluid bearing simultaneously. The effect of simplifying the process can be obtained.
Description
Technical field
The present invention is a kind of engraving method that is applied to make FDB, particularly about a kind of method of making the oil duct of FDB inner-diameter portion whose.
Background technique
In Machine Design, need make bearing can produce the effect of oil film pressure and oil sealing in the running at the internal diameter design oil duct of bearing during the FDB of making passive type.The inner oil duct of general bearing is to make with the cutting way of tradition processing; But motor now trends towards doing littler and littler, make high-precision small motor and is not easy, and small motor all requires very strict for the concentricity of the degree of depth, width and the bearing bore diameter of oil duct.If make with traditional processing mode of cutting, can produce burr, oil duct concentricity not good, problem such as tool wear and machining tool are made be difficult for.
MAT to develop with Metal Ball and rolls at bearing inner surface in order to address the above problem, and in order to extrude the technology of required oil duct groove mark, it is disclosed in U. S. Patent No. 5758421, and it becomes the major technique of present PANASONIC FDB product.But the method for this kind Metal Ball roll extrusion because the area of contact of Metal Ball and bearing part is little, thereby is easy to generate abrasion.In addition, because the Metal Ball of making oil duct is very little, the jig Design of seizing Metal Ball on both sides by the arms is difficult for, and also needs the control platform of a precision positioning when rolling.
In addition, there is the mode that adopts the plastics reaction-injection moulding to make the technology of FDB, as No. 6074098 disclosed technology of U. S. Patent.It is an elasticity of utilizing plastics itself, the plastic bearing of reaction-injection moulding is directly forced pull out the demoulding.But the rigidity of plastic bearing itself and hardness deficiency have the not shortcoming of abrasion performance.
Summary of the invention
In view of above prior art problems, the object of the present invention is to provide a kind of engraving method that is applied to make FDB, the inner-diameter portion whose that particularly is applied in FDB produces oil duct.The present invention utilizes engraving method to make the oil duct of FDB internal diameter, and quite ripe with the processing procedure of a large amount of manufacturing machine parts of engraving method, just technology now is limited to the part of making planar design more.Therefore the present invention is integrated into the processing procedure of existing machinery part easily, and the effect that reaches a large amount of productions and reduce cost.In addition, the present invention can avoid the burr problem that existing processing technique can produce and make simultaneously FDB radially with the thrust part; Can produce the effect of simplifying processing procedure.
For reaching above-mentioned purpose, a kind of engraving method that is applied to make FDB provided by the present invention, its step includes: at first, provide bearing material cylindraceous, its inner-diameter portion whose has the hollow cylindrical wall; Secondly, provide to spray and use axle, to being positioned at the bearing material and stretching into wherein with its hollow cylindrical wall of fitting, spray with axle and form a plurality of burrs of correspondence in the position that the hollow cylindrical wall waits to portray several oil ducts, its several burrs are close to the hollow cylindrical wall; Between several burrs, inject a protective material of tool flowability, fill up the gap of several burrs and hollow cylindrical wall; Then, make protective material freeze solidly on the hollow cylindrical wall to form several protection patterns; And will spray with axle and extract the bearing material, separation injection several protection patterns of axle and hollow cylindrical wall; The bearing material is inserted etching solution, and the generation of locating that makes the bearing material not cover several protection patterns is etched with several oil ducts of formation; Clean etching solution at last and remove several protection patterns.
Wherein, bearing material of the present invention is made by the metal of abrasion performance; Protective material is a plastic materials.And plastic materials can the reaction-injection moulding mode injects the gap of these several burrs and this hollow cylindrical wall.And the protrusion height of several burrs is that 10 microns (μ m) are to 100 microns (μ m), because its surperficial burr does not help to spray extracting and the demoulding with axle deeply; And part that can the injury protection pattern.The precision of accurate FDB is very important, and the present invention makes a plurality of oil ducts with engraving method, and its etching precision and the degree of depth can be by selecting suitable etching solution and etching period to control.
In addition, use engraving method of the present invention also not have the cutter problem that is difficult for cutter processing easy to wear of traditional mechanical processing; And the difficulty in use Metal Ball rolling finishing precision prescribed and the contraposition.
The invention effect
The engraving method that is applied to make FDB of the present invention can be applicable to make the inside oil duct part of small FDB.Have and be integrated into existing processing procedure easily, and the effect that reaches a large amount of productions and reduce cost.In addition, the present invention not only can avoid the burr problem that existing processing technique can produce and can make simultaneously FDB radially with the thrust part; Can produce the effect of simplifying processing procedure.
Relevant characteristics and implementation of the present invention, conjunction with figs. is described in detail as follows as most preferred embodiment now:
Description of drawings
Fig. 1 to Fig. 8 is the embodiment's fabrication steps schematic representation that is applied to make the engraving method of FDB of the present invention.
Fig. 9 is a schematic perspective view of embodiments of the invention step.
The number in the figure explanation
10 bearing materials
20 injection axles
30 plastic materialss
31 injection molding facility
40 etching baths
Embodiment
Technology disclosed in this invention is the engraving method that is applied to make FDB.The present invention utilizes one to spray with the mask (mask) of axle as the bearing material, and the protective material that reinjects produces the protection pattern in the inner-diameter portion whose of FDB, promptly as the photoresistance pattern part in the photolithographic techniques.Extract and spray with again the bearing material being carried out etching after the axle, to form required oil duct in its inner-diameter portion whose.Clean etching solution at last and remove its protection pattern.
In order to be described in more detail the present invention, following conjunction with figs. describes the fabrication steps of the embodiment of the invention in detail.Please refer to Fig. 1 to Fig. 8, Fig. 1 to Fig. 8 is the embodiment's fabrication steps schematic representation that is applied to make the engraving method of FDB of the present invention.
The fabrication steps of the embodiment of the invention includes: at first, provide bearing material 10 cylindraceous, and as shown in Figure 1, its inner-diameter portion whose is the hollow cylindrical wall.The metallic material of the material selection abrasion performance of bearing material.
The internal diameter of fitted bearing material provides an injection to use axle again, as shown in Figure 2.Spraying with axle 20 needs being positioned at bearing material 10 and stretching into wherein with applying hollow cylindrical wall, injection is with axle 20 and have several burrs, its burr position is the position of waiting to portray several oil ducts corresponding to the hollow cylindrical wall, its several burrs are close to the hollow cylindrical wall, make to spray the mask (mask) that becomes bearing material 10 with axle 20.
Then as shown in Figure 3, again with the mode of injection molding (Injection Molding) internal diameter with the plastic materials 30 injection bearing materials 10 of flowability.The injection molding mode be with plastic materials 30 via the plastic materials 30 of injection molding facility 31 with suitable pressure injection tool flowability between spraying with the internal diameter of several burrs of axle 20 and bearing material 10, fill up the gap of several burrs and hollow cylindrical wall.And because its gap portion is very little, need to use plastic materials 30, could fill up the gap of a plurality of burrs and hollow cylindrical wall smoothly with high fluidity.
Please refer to Fig. 4, with flowable plastic material 30 through suitable pressurize with solidify after, make plastic materials 30 freeze solidly on the hollow cylindrical wall, and cooperate several burrs that spray with axle 20 to form several to protect pattern.
And, use to spray and carry out the action of withdrawing pattern with axle 20, as shown in Figure 5, will spray with axle 20 and extract bearing material 10, separation injection a plurality of protection patterns of axle 20 and hollow cylindrical wall.The burr that sprays with axle 20 surfaces is to protrude about 10 microns (μ m) to 100 microns (μ m), and therefore, the height of its a plurality of protection patterns also drops in the same range as; And, help can not damage its several protection pattern to force the mode that ejects to carry out withdrawing pattern owing to spray with the burr on axle 20 surfaces quite shallowly.
Carry out etching step again; as shown in Figure 6 bearing material 10 is inserted etching bath 40; etching solutions in its etching bath 40 need be enough to cover whole bearing material 10, and do not cover locating to produce to be etched with and forming the required a plurality of oil ducts of FDB of a plurality of protection patterns in bearing material 10.Etching solution need cooperate employed bearing material 10 of the embodiment of the invention and plastic materials 30 to select.
Need carry out a step of cleaning etching solution after etched, as shown in Figure 7, avoid etching solution to continue to carry out etching, influence the mechanical precision and the degree of depth in several oil ducts.The present invention makes several oil ducts with engraving method, and its etching precision and the degree of depth can be by selecting suitable etching solution and etching period to control.
At last, several protection patterns of removing the hollow cylindrical wall just form required finished product, and as shown in Figure 8, mode removes several protection patterns can to use cutting, etching and directly pull out etc.In addition, the present invention system is applied to make FDB, and its injection can be several screw threads with several burrs on the axle.
Though preferred embodiment of the present invention openly as mentioned above; right its is not in order to limit the present invention; anyly have the knack of related art techniques person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, therefore scope of patent protection of the present invention must be looked the appended claim person of defining of this specification and is as the criterion.
Claims (7)
1. engraving method that is applied to make FDB, its step includes:
One bearing material is provided, has a hollow cylindrical wall;
One injection axle is provided, this bearing material of contraposition is to stretch into and to fit this hollow cylindrical wall, this injection has in this hollow cylindrical wall with axle waits that the position of portraying several oil ducts forms several corresponding burrs, and these several burrs are close to this hollow cylindrical wall;
In between these several burrs, inject a protective material of tool flowability, fill up the gap of these several burrs and this hollow cylindrical wall;
Make this protective material freeze solidly on this hollow cylindrical wall to form several protection patterns;
Should spray with axle and extract this bearing material, separate this injection with axle and this hollow cylindrical wall these several protect pattern;
This bearing material is inserted an etching solution, make this bearing material not cover locating to produce to be etched with and forming these several oil ducts of this several protection pattern;
Clean this etching solution; And
Remove these several the protection pattern.
2. the engraving method that is applied to make FDB as claimed in claim 1 is characterized in that, described bearing material is made by the metal of an abrasion performance.
3. the engraving method that is applied to make FDB as claimed in claim 1 is characterized in that, described protective material is a plastic materials.
4. the engraving method that is applied to make FDB as claimed in claim 3 is characterized in that, described several burrs are several screw threads.
5. the engraving method that is applied to make FDB as claimed in claim 3 is characterized in that, described plastic materials is the gap of injecting these several burrs and this hollow cylindrical wall in the reaction-injection moulding mode.
6. the engraving method that is applied to make FDB as claimed in claim 1 is characterized in that, the protrusion height of described several burrs is 10 microns to 100 microns.
7. the engraving method that is applied to make FDB as claimed in claim 1 is characterized in that, the etching precision and the degree of depth of described several oil ducts are controlled by this etching solution and etching period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02147999 CN1190605C (en) | 2002-11-01 | 2002-11-01 | Etching method used in manufacturing fluid bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02147999 CN1190605C (en) | 2002-11-01 | 2002-11-01 | Etching method used in manufacturing fluid bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1493794A CN1493794A (en) | 2004-05-05 |
| CN1190605C true CN1190605C (en) | 2005-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02147999 Expired - Fee Related CN1190605C (en) | 2002-11-01 | 2002-11-01 | Etching method used in manufacturing fluid bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1190605C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4211932B2 (en) * | 2002-02-28 | 2009-01-21 | 富士通株式会社 | DYNAMIC PRESSURE BEARING MANUFACTURING METHOD AND DYNAMIC PRESSURE BEARING MANUFACTURING DEVICE |
| CN102023478A (en) * | 2009-09-16 | 2011-04-20 | 东莞市伟峰印刷有限公司 | Etching method for three-dimensional workpiece |
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2002
- 2002-11-01 CN CN 02147999 patent/CN1190605C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1493794A (en) | 2004-05-05 |
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