US20070099547A1

US20070099547A1 - Polishing Device And Method With Multi Composite

Info

Publication number: US20070099547A1
Application number: US11/536,503
Authority: US
Inventors: Kuo-Cheng Huang; Cheng-Shin Chang; Chien-Yao Huang; Fong-Zhi Chen
Original assignee: Instrument Tech Res Center National Applied Research Labs
Current assignee: INSTRUMENT TECHNOLOGY RESEARCH CENTER NATIONAL APPLIED RESEARCH LABORATORIES; Instrument Tech Res Center National Applied Research Labs
Priority date: 2005-11-01
Filing date: 2006-09-28
Publication date: 2007-05-03
Also published as: TWI295219B; TW200718508A

Abstract

A polishing device and method with a multi composite are provided. The polishing device has a first end and a second end, and includes a spinning axle having a magnetic end mounted on the first end, an inductance coil wound around the spinning axle, a magnetic pole connected to the spinning axle at the magnetic end, a holder mounted at the second end of the polishing device, and a separator device mounted around the magnetic pole.

Description

FIELD OF THE INVENTION

The present invention relates to a polishing device and method, and more particularly to a polishing device and method with a multi composite.

BACKGROUND OF THE INVENTION

The objective of a lapping process is to modify a defect, such as a dig or a scratch on a workpiece surface, so as to promote a desired workpiece precision. The lapping process is applied to the precise processing of a flat surface, a column surface, a sphere surface, or a special surface. In the lapping process, new contact surfaces between the lapping device surface and a workpiece surface continue to be generated due to mutual friction. Mixed oil, grease, or water is added to the contact surfaces to facilitate friction and the lapping process.
A polishing process is to polish a workpiece surface by effacing a certain amount of metals from the workpiece surface.
A polishing process based on a belt polishing method, not for precise machining, is to polish the workpiece surface through a rolling wheel covered with rubbing material dotted with grains for rubbing. The rubbing material is flexible so that it can be applied to the workpiece in a non-regular shape. The effaced amount of metal and brightness of the polished surface after the polishing process is based on material characteristics of the metal, rolling speed of the wheel, contact pressure between the wheel and the metal surface, and the size of the grains. The rubbing material covering the wheel is made of cotton cloth, sailcloth, leather, or felt. The rubbing material with a proper width is thus connected to another one by glue or through sewing. The surface of the wheel is applied with glue and dotted with a layer of grains for rubbing, and then the wheel rolls in a sink filled with grains composed of alumina and carborundum. After drying, the above step is repeated to apply a second layer of glue and grains on the wheel. A tough and hard rubbing material dotted with two layers of grains is thus formed. Usually, a polishing process is completed after several times of polishing with the grain size from the coarse to the fine ones.
A polishing process based on a barrel finishing method is extensively used to polish a large number of workpieces and achieve a uniform surface brightness by effacing rough edges, rust, jag or oxide from the surface. The workpieces, grains, and essential substances, which facilitate to rub the workpiece surface in the polishing process, are added into the barrel. When the barrel rolls, the workpieces, the grains, and the substances are mixed and therefore the workpiece surface is polished. A polishing process based on a barrel tumbling method is also used, where the barrel could vibrate other than roll to polish the workpiece surface, and the processing speed for such polishing process is shorter than that for the barrel finishing method due to the vibration of the whole workpieces along with the grains and the substances.
There are some problems in the foresaid methods. In the belt polishing method, a specific wheel size could not meet the curvature of another workpiece surface. In the barrel finishing and tumbling methods, the rubbed workpiece surface can hardly achieve the desired surface precision. On the other hand, the grain could also lead damage to the workpiece surface in the lapping or polishing process.
Besides, an auxiliary device should be manufactured before the lapping and polishing processes according to the relevant factors, such as a carving trace of the auxiliary device, the shape of the auxiliary device, and the smoothness of the auxiliary device surface. Moreover, a lapping or polishing parameter for a lapping or polishing device, like a lapping or polishing degree, a rolling speed of the workpiece, a rolling speed of the auxiliary device, and a contact pressure between the workpiece and the auxiliary device, should be considered and adjusted. Most importantly, it takes a long time for a lapping or polishing technician to learn how to control the lapping or polishing device. Consequently, the traditional processes rely much on technician experience and cost much time and money.
New development of a lapping or polishing technology, like a hydrodynamic polishing process, elastic emission polishing process, a chemical mechanical or mechanical chemical process, a barrel polishing process and a magnetorheological fluid polishing process, continues to make significant progress. However, there are still some limitations, like costly equipment, a restrictive polishing or lapping range on a workpiece surface, a workpiece surface precision, and a resultant pollution.
From the above description, it is known that how to develop an improved polishing device and method has become a major problem to be solved. In order to overcome the drawbacks in the prior art, a polishing device and method with multi composite are provided. The particular design in the present invention not only solves the problems described above, but also is easy to be implemented. Thus, the invention has the utility for the industry.

SUMMARY OF THE INVENTION

It is therefore an aspect of the present invention to provide a polishing device. The polishing device has a first end and a second end, and includes a spinning axle mounted on the first end with a magnetic end to generate a magnetic end, an inductance coil wound around the spinning axle to generate a magnetic field, a magnetic pole connected to the magnetic end to adsorb a magnetic matter, a holder mounted at the second end of the polishing device to support a workpiece, a slurry to encapsulate the magnetic matter adsorbed by the magnetic pole to polish the workpiece, and a separator device mounted around the magnetic pole to prevent the magnetic matter from spun out from the polishing device.
According to the foregoing aspect of the present invention, the spinning axle is movable.
According to the foregoing aspect of the present invention, the magnetic pole has a fixed surface, and the spinning axle swings based on the fixed point in an arbitrary degree.
According to the foregoing aspect of the present invention, the spinning axle has an adjustable spinning speed.
According to the foregoing aspect of the present invention, the spinning axle has an adjustable swinging speed.
According to the foregoing aspect of the present invention, the magnetic pole has a flat surface.
According to the foregoing aspect of the present invention, the magnetic pole has a concave.
According to the foregoing aspect of the present invention, the magnetic pole has a convex.
According to the foregoing aspect of the present invention, the spinning axle is solid.
According to the foregoing aspect of the present invention, the spinning axle is hollow.
According to the foregoing aspect of the present invention, the magnetic pole has a slot.
According to the foregoing aspect of the present invention, the holder has as an adjustable spinning speed.
According to the foregoing aspect of the present invention, the workpiece is between the magnetic pole and the holder.
According to the foregoing aspect of the present invention, the magnetic matter is formed by a multi composite encapsulated by a slurry.
It is therefore another aspect of the present invention to provide a multi composite. The multi composite includes at least a magnetic material, a slurry, and a binding agent. The binding agent binds the slurry and the magnetic material, and the magnetic material is encapsulated by the slurry and the binding agent
According to the foregoing aspect of the present invention, the magnetic material contains one selected from the group consisting of iron, cobalt, nickel, and an alloy thereof.
According to the foregoing aspect of the present invention, the slurry contains one selected from the group consisting of carborundum, cerium oxide, ferric oxide, zirconia, alundum, diamond and a combination thereof.
According to the foregoing aspect of the present invention, the multi composite is applied to a polishing device having a magnetic pole so as to polish a surface of a workpiece.
According to the foregoing aspect of the present invention, the multi composite moves in a constant pattern between the magnetic pole and the surface.
According to the foregoing aspect of the present invention, the multi composite slidably moves between the magnetic pole and the surface.
According to the foregoing aspect of the present invention, the multi composite rotatably moves between the magnetic pole and the surface.
According to the foregoing aspect of the present invention, the multi composite moves in a hybrid pattern of at least two from the group consisting of constant, slide, and rotation.
It is therefore a further aspect of the present invention to provide a polishing method for the polishing device. The polishing method includes steps of providing the polishing device, a multi composite encapsulated by a slurry and a working sample, generating a magnetic field by inputting a current to the polishing device, adsorbing the multi composite by the magnetic field, and polishing the working sample by the slurry and the multi composite.
According to the foregoing aspect of the present invention, the polishing device has an electromagnetic structure.
According to the foregoing aspect of the present invention, the multi composite comprises at least a magnetic material.
According to the foregoing aspect of the present invention, the multi composite further comprises a binding agent.
Other objects, advantages and efficacies of the present invention will be described in detail below taken from the preferred embodiments with reference to the accompanying drawings.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is an illustration for the polishing device according to a preferred embodiment of the present invention;
FIGS. 2(a), 2(b) and 2(c) are illustrations for the geometry of the magnetic pole according to the present invention;
FIG. 3 is an illustration for the magnetic pole surface having slots in a three-dimensional view according to the present invention;
FIG. 4 is an illustration for the magnetic pole surface having slots in a cross-sectional view according to the present invention;
FIGS. 5(a), 5(b), 5(c), 5(d), 5(e) and 5(f) are illustrations for the multi composite structure according to the present invention;
FIGS. 6(a), 6(b), 6(c), 6(d) and 6(e) are illustrations for the multi composite eccentric structure according to the present invention;
FIG. 7 is an illustration for the multi composite ready for a close contact according to the present invention;
FIG. 8 is an illustration for the separator device according to the present invention; and
FIG. 9 is an illustration for the multi composite encapsulated by a slurry according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for the purposes of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed.
Please refer to FIG. 1, which is an illustration for the polishing device according to a preferred embodiment of the present invention. The polishing device comprises a spinning axle 11, an inductance coil 12, a separator device 13, a slurry nozzle 14, a magnetic pole 15, a multi composite 16, a concave workpiece 17, and a holder 18. The inductance coil 12 is wound around the spinning axle 11, and the spinning axle 11 is connected to the magnetic pole 15 where the separtor device 13 is attached. The concave workpiece 17 is placed on the holder 18 and below the magnetic pole 15. The holder 18 is movable at an adjustable speed (.₂). The spinning axle 11 is movable at an adjustable speed (.₁) and swings at an arbitrary degree (. or .) and at an adjustable speed based on a fixed point in the center of the surface of the magnetic pole 15.
The magnetic pole generates a magnetic field, which is 0˜3 Teslas in the embodiment of the present invention, proportional to a magnitude of an input current (I) to the inductance coil and the density of the inductance coil (n) to adsorb the multi composite. In the lapping process, the quantity of the input current (I) is magnified to raise the friction of the multi composite and improve the surface precision of the concave workpiece 17. In the polishing process, on the contrary, the input current (I) is reduced to improve the smoothness of the surface of the concave workpiece 17.
The slurry nozzle injects a slurry, which comprises different sizes of slurry grains made of carborundum, cerium oxide, ferric oxide, zirconia, alumdum, diamond, mixed oil, and water, to assist in processing, cooling, and tailing-removing according to a choice of the multi composite in the process described above.
Please refer to FIGS. 2(a), 2(b) and 2(c), which are illustrations for the geometry of the magnetic pole according to the present invention, where the magnetic pole connected to the spinning axle is hollow or solid. In FIG. 2(a), the magnetic pole 21 has a concave, which is suitable for a convex workpiece 22. In FIG. 2(b), the magnetic pole 15 has a convex, which is suitable for a concave workpiece 17. In FIG. 2(c), the magnetic pole 23 has a flat surface, which is suitable for a flat surface workpiece 24.
Please refer to FIG. 3 and FIG. 4. FIG. 3 is an illustration for the magnetic pole surface having slots in a three-dimensional view according to the present invention, and FIG. 4 is an illustration for the magnetic pole surface having slots in a cross-sectional view according to the present invention. As shown in FIGS. 3 and 4, the magnetic pole 15 has a plurality of slots 19 on its surface for controlling a magnetic force line distribution.
Please refer to FIGS. 5(a), 5(b), 5(c), 5(d), 5(e) and 5(f), which are illustrations for the multi composite structure according to the present invention. In FIG. 5(a), the multi composite structure is a ball-shaped magnetic material 31 encapsulated by a binding agent and a slurry grain 32. In FIG. 5(b), the multi composite structure is a bullet-shaped magnetic material 33 encapsulated by a binding agent and a slurry grain 32. In FIG. 5(c), the multi composite structure is an elliptic magnetic material 34 encapsulated by a binding agent and a slurry grain 32. In FIG. 5(d), the multi composite structure is an oblong magnetic material 35 encapsulated by a binding agent and a slurry grain 32. In FIG. 5(e), the multi composite structure is an almond pie-shaped material 36 encapsulated by a binding agent and a slurry grain 32. In FIG. 5(f), the multi composite structure is a pyramid-shaped magnetic material 37 encapsulated by a binding agent and a slurry grain 32.
Each of the magnetic materials 31, 33, 34, 35, 36, and 37 contains one selected from the group consisting of iron, cobalt, nickel, and an alloy thereof. The slurry grain 32 contains one selected from the group consisting of carborudum, cerium oxide, ferric oxide, zirconia, alundum, diamond and a combination thereof.
Please refer to FIGS. 6(a), 6(b), 6(c), 6(d) and 6(e), which are illustrations for the multi composite eccentric structure according to the present invention. In FIG. 6(a), the multi composite eccentric structure is a ball-shaped magnetic material 61 encapsulated by the binding agent and the slurry grain 32. In FIG. 6(b), the multi composite eccentric structure is a bullet-shaped magnetic material 63 encapsulated by the binding agent and the slurry grain 32. In FIG. 6(c), the multi composite eccentric structure is an almond pie-shaped magnetic material 66 encapsulated by the binding agent and the slurry grain 32. In FIG. 6(d), the multi composite eccentric structure is an elliptic magnetic material 64 encapsulated by the binding agent and the slurry grain 32. In FIG. 6(e), the multi composite eccentric structure is a pyramid-shaped magnetic material 67 encapsulated by the binding agent and the slurry grain 32.
Please refer to FIG. 7, which is an illustration for the multi composite ready for a close contact according to the present invention. As shown in FIG. 7, the multi composite 16 is ready for a close contact with the workpiece 17 to facilitate the polishing process. The input current to the inductance coil is reduced, allowing the multi composite 16 adsorbed by the magnetic pole 15 a relative slide (.) along the surface of the workpiece 17, to facilitate the polishing process.
Please refer to FIG. 8, which is an illustration for the separator device according to the present invention. The separator device 13 prevents the multi composite 16 from being spun out from A to A′ to assure the polishing process.
Please refer to FIG. 9, which is an illustration for the multi composite encapsulated by the slurry according to the present invention. The slurry 62 is distributed and attached to the multi composite 16 via the multi composite movement and capillarity to facilitate the polishing process.
In conclusion, the present invention solves common defects in the polishing devices, streamlines the polishing process, and accomplishes a high precision polished workpiece surface and an efficient polishing device.
While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.

Claims

1. A polishing device having a first end and a second end, comprising:

a spinning axle mounted on said first end, generating a magnetic force and having a magnetic end;

an inductance coil wound around said spinning axle and providing an input current to generate a magnetic field;

a magnetic pole connected to said spinning axle at said magnetic end for adsorbing a magnetic matter;

a holder mounted at said second end of said polishing device and supporting a workpiece; and

a separator device mounted around said magnetic pole to prevent said magnetic matter from being spun out from said polishing device.

2. The polishing device as claimed in claim 1, wherein said spinning axle is movable.

3. The polishing device as claimed in claim 1, wherein said magnetic pole has a surface with a fixed point and said spinning axle swings in an arbitrary degree based on said fixed point.

4. The polishing device as claimed in claim 1, wherein said spinning axle has an adjustable spinning speed.

5. The polishing device as claimed in claim 1, wherein said spinning axle has an adjustable swinging speed.

6. The polishing device as claimed in claim 1, wherein said magnetic pole has a flat surface.

7. The polishing device as claimed in claim 1, wherein said magnetic pole has a concave.

8. The polishing device as claimed in claim 1, wherein said magnetic pole has a convex.

9. The polishing device as claimed in claim 1, wherein an axis of said magnetic pole is hollow.

10. The polishing device as claimed in claim 1, wherein said axle of said magnetic pole is solid.

11. The polishing device as claimed in claim 1, wherein said magnetic pole has a slot.

12. The polishing device as claimed in claim 1, wherein said holder has an adjustable spinning speed.

13. The polishing pole as claimed in claim 1, wherein said workpiece is between said magnetic pole and said holder.

14. The polishing device as claimed in claim 1, wherein said magnetic matter is formed by a multi composite encapsulated by a slurry.

15. A multi composite, comprising:

at least a magnetic material;

a slurry; and

a binding agent;

wherein said binding agent binds said slurry and said magnetic material, and said magnetic material is encapsulated by said slurry and said binding agent.

16. The multi composite as claimed in claim 15, wherein said magnetic material contains one selected from the group consisting of iron, cobalt, nickel, and an alloy thereof.

17. The multi composite as claimed in claim 15, wherein said slurry contains one selected from the group consisting of carborundum, cerium oxide, ferric oxide, zirconia, alundum, diamond and a combination thereof.

18. The multi composite as claimed in claim 15, being applied to a polishing device having a magnetic pole so as to polish a surface of a workpiece.

19. The multi composite as claimed in claim 18, moving in a constant pattern between said magnetic pole and said surface.

20. The multi composite as claimed in claim 18, slidably moving between said magnetic pole and said surface.

21. The multi composite as claimed in claim 18, rotatably moving between said magnetic pole and said surface.

22. The multi composite as claimed in claim 18, which moves in a hybrid pattern of at least two from the group consisting of constant, slide, and rotation.

23. A polishing method for a polishing device, comprising steps of:

providing said polishing device, a workpiece, and a multi composite encapsulated by a slurry;

generating a magnetic field by inputting a current to said polishing device;

adsorbing said multi composite by said magnetic field; and

polishing said workpiece by said slurry and said multi composite.

24. The polishing method for a polishing device as claimed in claim 23, wherein said polishing device has an electromagnetic structure.

25. The polishing method for a polishing device as claimed in claim 23, wherein said multi composite comprises at least a magnetic material.

26. The polishing method for a polishing device as claimed in claim 28, wherein said multi composite further comprises a binding agent.