CN104191318B - Magneto-rheological polishing method and tool - Google Patents
Magneto-rheological polishing method and tool Download PDFInfo
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- CN104191318B CN104191318B CN201410440862.6A CN201410440862A CN104191318B CN 104191318 B CN104191318 B CN 104191318B CN 201410440862 A CN201410440862 A CN 201410440862A CN 104191318 B CN104191318 B CN 104191318B
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- 238000005498 polishing Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009826 distribution Methods 0.000 claims abstract description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000006061 abrasive grain Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000518 rheometry Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a magneto-rheological polishing method and device. The magneto-rheological polishing method comprises the steps that surface type information of a workpiece is known; the position and polishing interval of the polishing tool are determined; the polishing interval is filled with magneto-rheological fluid; according to surface shape information of a polishing area and linear velocity distribution of all points in the polishing area, polishing pressure distribution is calculated when the removal rate is even; magnetic field distribution is obtained according to the pressure distribution through inverse solution; according to the obtained magnetic field distribution model, coil voltages of three layers of concentric circular electromagnets are changed respectively, so that magnetic field distribution in the radius direction meets the requirement; polishing is carried out. According to the magneto-rheological polishing method, the concentric circular electromagnets are of a nested structure and supply power to a collecting ring respectively, and therefore the purposes that magnetic fields at the same radius are the same in intensity and intensity of magnetic fields at different radii can be controlled separately are achieved.
Description
Technical field
The present invention relates to a kind of application of novel intelligent material, belongs to skin processing field, it is more particularly to a kind of magnetorheological
Finishing method and polishing tool.
Background technology
Magnetorheological is a kind of intellectual material, is by high magnetic permeability, low hysteresis small soft magnetic particles and non-magnetic
The suspended substance of liquid mixing.It is under normal conditions liquid, when loaded magnetic field is added, liquid-solid phase occurs and becomes, when except demagnetizing field
When, there is solid-liquid phase again and become.In the range of certain magnetic field intensity, the apparent viscosity of magnetic flow liquid is relevant with magnetic field intensity.
This phenomenon is referred to as magnetic rheology effect.Using the magnetic rheology effect of magnetic flow liquid, agglomeration of abrasive particles can be formed in polishing area
Flexible bistrique, it is adjustable with bistrique hardness, abrasive particle from sharp, the advantages of face type is posted, for polishing function admirable.
Can pass through to change the hardness that magnetic field intensity changes bistrique during existing magnetorheological finishing device polishing operation, but entirely
The Material removal model of polishing area is fixed.To complex-curved polishing, careful design polishing locus are needed, could be realized
The uniform removal of each point material in polishing area is reached, preferable polishing effect is reached.
Applicant obtains patent of invention 201110116955.X for authorizing《A kind of controllable magnetorheological uniform of clearance model
Finishing method and device》, change the Distribution of Magnetic Field of polishing area using three cone-shaped electric magnet, remove so as to reach to change
The purpose of model.When this method polishes complex-curved, need to be changed according to face type, calculate suitable Distribution of Magnetic Field, and from number
According to Distribution of Magnetic Field approximate therewith is called in storehouse, change the voltage of each electric magnet, so as to obtain suitable clearance model.This
The method of kind can realize uniform polish, but in practice magnetic field calculation is complicated, can only be approximate by the way of data base call, because
This polishing effect is not ideal enough.
Based on this, the buffer for having invented new magnetic rheological polishing method and being made up of three layers of concentric circular ring electromagnet
Tool, it is therefore an objective to preferable polishing effect is reached, while easy to operate.
The content of the invention
To solve the problems, such as above-mentioned prior art, it is an object of the invention to provide a kind of magnetic rheological polishing method and
The polishing tool being made up of three layers of concentric circular ring electromagnet.The inventive method and instrument hinge structure can reach preferably
Polishing effect, while easy to operate.
To reach above-mentioned purpose, the technical scheme is that：
A kind of magnetic rheological polishing method, specifically includes following steps：
Step one, known workpiece face type information；
Step 2, the position for determining polishing tool and polishing clearance；
Step 3, inject in polishing clearance magnetic flow liquid；
Step 4, it is distributed by each point linear velocity in the face shape information and polishing area of polishing area, calculating is uniformly gone
Except polish pressure distribution during rate；
Polishing velocity ν=ω r during known plane polishing, then in the polishing velocity distribution of polishing area radial direction, the center of circle
Place's linear velocity is minimum, gradually increases along radial direction linear velocity, and in edge, linear velocity is maximum, and polishing clearance is obeyed
Preston equations, γ=kpv, k are constant coefficient, and p is polish pressure, and v is polishing linear velocity, during MRF, circle polishing
The polishing velocity in region is gradually increased from center to outer radial direction, and only polish pressure is gradually reduced, it is ensured that polishing velocity
Product with polish pressure is constant, just can guarantee that the uniform removal to surface of the work；
Step 5, by pressure distribution reverse Distribution of Magnetic Field
Due to MRF pressure：
Polish pressure P=Pm*S
μ in formula0、μf、μp, S be definite value, then polish pressure is directly proportional to magnetic field intensity H；
Step 6, by gained magnetic field distribution model, change the respective coil voltage of three layers of concentric circular ring electromagnet, make edge
The Distribution of Magnetic Field of radial direction meets the requirements；
Step 7, it is polished operation.
The magnetorheological finishing device that above-mentioned finishing method is adopted, is made up of three layers of concentric circular ring electromagnet, including：Electricity
Machine, shaft coupling, copper ring, brush, hollow collector ring, electric magnet, solenoid, shell, deck of powering, workbench base plate；
Bottom is three layers of column type electric magnet for nesting together, and is separated by insulating barrier between each layer, electric magnet gap bag
Around solenoid, every layer of electric magnet is individually powered, and electric magnet top is surrounded by shell and fixed, and shell upper end center position is connected and justifies
The hollow collector ring of column type, it is alternate on collector ring external cylindrical surface to be provided with 6 road grooves, and copper ring is inlayed, electromagnetic wire in three layers of electric magnet
6 wires of circle are not connected by hollow current collection ring part with six copper rings, and power supply deck surrounds hollow collector ring, deck of powering
It is upper to open 6 through holes with 6 road groove correspondence positions, brush is embedded in, it is allowed to be contacted respectively with six copper rings, power supply deck bottom passes through
Screw is fixed on work top base plate, and the upper end of hollow collector ring is connected by shaft coupling with the motor shaft of spindle motor.
Further, the electric magnet is at least three layers.
Further, in the structure, power supply deck is fixed on workbench base plate, is stationary parts；Collector ring, electromagnetism
Ferrum, shell have collectively constituted moving component；External power source is powered by 6 brushes, collector ring to the electric magnet of three groups of rotations.
Relative to prior art, beneficial effects of the present invention are：
1st, finishing method of the present invention adopts the ring-like electric magnet nested structure of concentric circular, collector ring to power respectively, reach identical
Magnetic field intensity at radius is identical, the purpose that the magnetic field intensity at different radii can be controlled individually；
2nd, model library need not be set up in finishing method of the present invention, directly calculating magnetic field can be distributed, and by electric magnet
Voltage changes and directly change magnetic field.Distribution of Magnetic Field control is accurate, easy.Easily realize the uniform polish to workpiece.
3rd, in a polishing area, it is known that the polishing linear velocity on the surface information and each point of workpiece, acted on by change
In the polish pressure of polishing area each point, the uniform clearance of each point is obtained, also correspond to construct a surface of the work of fitting completely
Sharpening, each point can be made to obtain uniform material and to be removed.
4th, the inventive method and device applicable surface shape are wide；Polishing tool simple structure, it is simple for production.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Wherein, 1- motors, 2- shaft couplings, 3- copper rings, 4- brushes, 5- collector rings, 6- electric magnet, 7- solenoids, outside 8-
Shell, 9- powers deck, 10- workbench base plates.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the present invention program,
A kind of magnetic rheological polishing method, specifically includes following steps：
Step one, known workpiece face type information；
Step 2, the position for determining polishing tool and polishing clearance；
Step 3, inject in polishing clearance magnetic flow liquid；
Step 4, it is distributed by each point linear velocity in the face shape information and polishing area of polishing area, calculating is uniformly gone
Except polish pressure distribution during rate；
Polishing velocity ν=ω r during known plane polishing, then in the polishing velocity distribution of polishing area radial direction, the center of circle
Place's linear velocity is minimum, gradually increases along radial direction linear velocity, and in edge, linear velocity is maximum, and polishing clearance is obeyed
Preston equations, γ=kpv, k are constant coefficient, and p is polish pressure, and v is polishing linear velocity, during MRF, circle polishing
The polishing velocity in region is gradually increased from center to outer radial direction, and only polish pressure is gradually reduced, it is ensured that polishing velocity
Product with polish pressure is constant, just can guarantee that the uniform removal to surface of the work；
Step 5, by pressure distribution reverse Distribution of Magnetic Field
Due to MRF pressure：
Polish pressure P=Pm*S
μ in formula0、μf、μp, S be definite value, then polish pressure is directly proportional to magnetic field intensity H；
Step 6, by gained magnetic field distribution model, change the respective coil voltage of three layers of concentric circular ring electromagnet, make edge
The Distribution of Magnetic Field of radial direction meets the requirements；
Step 7, it is polished operation.
The magnetorheological finishing device that above-mentioned finishing method is adopted, is made up of three layers of concentric circular ring electromagnet, including：Electricity
Machine 1, shaft coupling 2, copper ring 3, brush 4, collector ring 5, electric magnet 6, solenoid 7, shell 8, deck 9 of powering, workbench base plate
10；
Bottom is three layers of column type electric magnet 6 for nesting together, and is separated by insulating barrier between each layer, the gap of electric magnet 6
Wrapping solenoid 7, every layer of electric magnet 6 is individually powered, and the top of electric magnet 6 surrounds fixation, the upper end center position of shell 8 by shell 8
The hollow collector ring 5 of connected column type is put, it is alternate on the external cylindrical surface of collector ring 5 to be provided with 6 road grooves, and copper ring 3 is inlayed, three layers of electromagnetism
6 wires of solenoid 7 are connected with six copper rings 3 respectively by inside hollow collector ring 5 in ferrum 6, and power supply deck 9 surrounds hollow
Collector ring 5,6 through holes are opened on power supply deck 9 with 6 road groove correspondence positions, are embedded in brush 4, are allowed to be connect respectively with six copper rings 3
Touch, the power supply bottom of deck 9 is fixed on work top base plate 10 by screw, the upper end of hollow collector ring 5 by shaft coupling 2 with
The motor shaft of spindle motor 1 is connected.
Further, to be at least three layers of electric magnet number of plies more for the electric magnet 6, control more accurate, therefore are not limited to three
Layer, can be with more.
Further, in the structure, power supply deck 9 is fixed on workbench base plate 10, is stationary parts；Collector ring 5,
Electric magnet 6, shell 8 have collectively constituted moving component；External power source passes through 6 brushes 4, the electromagnetism of three groups of rotations of collector ring 5 pair
Ferrum 6 is powered.
The present invention operation principle be：When burnishing device works, spindle motor 1 drives collector ring 5, electricity by shaft coupling 2
Magnet 6, shell 8 rotate, and external power source is powered by 6 brushes 4, the electric magnet 6 of three groups of rotations of collector ring 5 pair.Electric magnet 6 leads to
After electricity, in bottom magnetic field is formed.Three layers of electric magnet 6 are different due to the respective voltage for applying, and the intensity of electromagnetic field is also differed.
It is exactly the rounded bottom in burnishing device, from inside to outside the magnetic field intensity of each layer is different.The immersion of burnishing device bottom is mixed with into mill
In the magnetic flow liquid of material granule, under the action of a magnetic field, the congregate of the magnetic flow liquid in burnishing device of abrasive grain is mixed with.By
In the difference of Distribution of Magnetic Field, along radial direction, the viscosity of the magnetic flow liquid of each layer is also different.During polishing operation, reflect
What is come is the difference of polish pressure distribution.The distribution of polish pressure, can pass through the supply voltage reality for adjusting each electric magnet 6
It is existing.
Finishing method：
Workpiece immersion is mixed with the Magnetorheologicai polishing liquid of abrasive grain during polishing.Polishing tool bottom is placed in into surface of the work
On, 1mm or so gap is kept between the two.Electric magnet is powered, and is mixed with the magnetic flow liquid of abrasive grain in polishing tool bottom
Aggregation forms rubbing head.Spindle motor is powered, and drives polishing tool rotation.It is relative between the abrasive grain of solidification and surface of the work
Motion, removes so as to complete the material to surface of the work.Because polishing tool is made up of three layers of concentric circular ring electromagnet, per layer
The magnetic field intensity of electric magnet is different, then the magnetic field intensity at polishing tool rounded bottom different radii is different, and same radius
The magnetic field intensity at place is identical.
Polishing clearance obeys Preston equations, γ=kpv
K is constant coefficient, and p is polish pressure, and v is polishing linear velocity.During MRF, the polishing speed of circular polishing area
Du You centers to outer radial direction gradually increases, and only polish pressure is gradually reduced, it is ensured that polishing velocity and polish pressure
Product is constant, just can guarantee that the uniform removal to surface of the work.According to the face type information of workpiece polishing area, control polishing is gone
Except the distribution of rate, it is achieved that the intelligence to workpiece is polished.
Polishing tool according to the present invention is made up of the ring-like electric magnet of three layers of concentric circular, and three layers of electric magnet are individually powered, can
To obtain per layer of different magnetic field intensity.
Due to MRF pressure：
Polish pressure P=Pm*S
μ in formula0、μf、μp, S be definite value, then polish pressure is directly proportional to magnetic field intensity H.
Then per layer of polish pressure can be controlled individually, so as to reach the purpose of uniform removal.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
The change or replacement expected without creative work, all should be included within the scope of the present invention.Therefore, it is of the invention
The protection domain that protection domain should be limited by claims is defined.
Claims (1)
1. a kind of a kind of magnetic rheological polishing method, it is characterised in that magnetorheological finishing device of enforcement the method, by three layers with one heart
Annular electric magnet is constituted, including：Motor, shaft coupling, copper ring, brush, hollow collector ring, electric magnet, solenoid, shell,
Power supply deck, workbench base plate；Bottom is the column type electric magnet that three layers of annular electric magnet are nested together, between each layer by
Insulating barrier separates, and electric magnet gap wrapping solenoid, every layer of electric magnet is individually powered, and electric magnet top surrounds solid by shell
Fixed, shell upper end center position connected column type hollow collector ring is alternate on collector ring external cylindrical surface to be provided with 6 road grooves, and inlays
Embedding copper ring, 6 wires of solenoid are not connected by hollow current collection ring part with six copper rings in three layers of electric magnet, for electric card
Seat surrounds hollow collector ring, and 6 through holes are opened with 6 road groove correspondence positions on power supply deck, is embedded in brush, is allowed to and six copper rings
Contact respectively, power supply deck bottom is fixed on work top base plate by screw, the upper end of hollow collector ring passes through shaft coupling
It is connected with the motor shaft of spindle motor；Power supply deck is fixed on workbench base plate, is stationary parts；It is collector ring, electric magnet, outer
Shell has collectively constituted moving component；External power source is powered by 6 brushes, collector ring to the electric magnet of three layers of rotation；
The method specifically includes following steps：
Step one, known workpiece face type information；
Step 2, the position for determining polishing tool and polishing clearance；
Step 3, inject in polishing clearance magnetic flow liquid；
Step 4, it is distributed by each point linear velocity in the face shape information and polishing area of polishing area, calculates and obtain uniform clearance
When polish pressure distribution；
Polishing velocity ν=ω r during known plane polishing, then in the polishing velocity distribution of polishing area radial direction, circle centre position line
Speed is minimum, gradually increases along radial direction linear velocity, and in edge, linear velocity is maximum, and polishing clearance obeys Preston side
Journey, γ=kpv, k are constant coefficient, and p is polish pressure, and v is polishing linear velocity, during MRF, the throwing of circular polishing area
Ray velocity is gradually increased from center to outer radial direction, and only polish pressure is gradually reduced, it is ensured that polishing velocity and polishing pressure
The product of power is constant, just can guarantee that the uniform removal to surface of the work；
Step 5, by pressure distribution reverse Distribution of Magnetic Field
Due to MRF pressure：
Polish pressure P=Pm*S
μ in formula0、μf、μp, S be definite value, then polish pressure is directly proportional to magnetic field intensity H；
Step 6, by gained magnetic field distribution model, change the respective coil voltage of three layers of concentric circular ring electromagnet, make along radius
The Distribution of Magnetic Field in direction meets the requirements；
Step 7, it is polished operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410440862.6A CN104191318B (en) | 2014-09-01 | 2014-09-01 | Magneto-rheological polishing method and tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410440862.6A CN104191318B (en) | 2014-09-01 | 2014-09-01 | Magneto-rheological polishing method and tool |
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| Publication Number | Publication Date |
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| CN104191318A CN104191318A (en) | 2014-12-10 |
| CN104191318B true CN104191318B (en) | 2017-05-10 |
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| CN104858723B (en) * | 2015-05-26 | 2017-08-15 | 浙江师范大学 | Non-magnetic element spirally magnetorheological brush polishing machine |
| CN105458839B (en) * | 2015-08-17 | 2017-11-17 | 宇环数控机床股份有限公司 | A kind of magnetic rheological polishing method and device |
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| CN108857590A (en) * | 2018-06-26 | 2018-11-23 | 南通大学 | A kind of control system of Magnetorheological Polishing equipment |
| CN108857589A (en) * | 2018-06-26 | 2018-11-23 | 南通大学 | A kind of magnetic pole adjusting unit protection system of Magnetorheological Polishing equipment |
| CN109551310A (en) * | 2018-12-10 | 2019-04-02 | 上海理工大学 | A kind of electromagnet type magnetic coupling fluid polishing device |
| CN109693148B (en) * | 2019-03-06 | 2021-08-31 | 香港理工大学 | Equipment for polishing workpieces in batches |
| CN110227984B (en) * | 2019-06-17 | 2021-07-02 | 南方科技大学 | Aspheric optical component polishing process |
| CN111482890B (en) * | 2020-05-28 | 2021-05-25 | 浙江师范大学 | Magnetic grinding device and magnetic grinding control method |
| CN111687696A (en) * | 2020-07-25 | 2020-09-22 | 浙江师范大学 | Flexible polishing head based on magnetorheological elastomer |
| CN114055258B (en) * | 2021-11-19 | 2023-04-18 | 浙江师范大学 | Magnetic polishing device and magnetic polishing control method |
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| US6863771B2 (en) * | 2001-07-25 | 2005-03-08 | Micron Technology, Inc. | Differential pressure application apparatus for use in polishing layers of semiconductor device structures and methods |
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Effective date of registration: 20191211 Address after: 314408 No. 3 Industrial Park, Changan Town, Jiaxing, Zhejiang, Haining Patentee after: ZHEJIANG FUSIDA TOOLS CO., LTD. Address before: 321004 No. 688 Yingbin Road, Zhejiang, Jinhua Patentee before: Zhejiang Normal University |
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Address after: 314408 No. 3 Industrial Park, Changan Town, Jiaxing, Zhejiang, Haining Patentee after: Zhejiang Shengda Industry Co., Ltd Address before: 314408 No. 3 Industrial Park, Changan Town, Jiaxing, Zhejiang, Haining Patentee before: ZHEJIANG FUSIDA TOOLS CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |