CN109500662B - Excitation device based on extension formula magnetic current becomes polishing - Google Patents
Excitation device based on extension formula magnetic current becomes polishing Download PDFInfo
- Publication number
- CN109500662B CN109500662B CN201811567497.XA CN201811567497A CN109500662B CN 109500662 B CN109500662 B CN 109500662B CN 201811567497 A CN201811567497 A CN 201811567497A CN 109500662 B CN109500662 B CN 109500662B
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- magnetic
- vertical direction
- polishing
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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 an excitation device based on extension type magnetorheological polishing. The excitation device mainly comprises at least two magnetic pole groups and a piece of magnetic conductive sheet (3), wherein each magnetic pole group comprises two permanent magnet magnetic poles (1) superposed in the horizontal direction and a connecting column (2) positioned between the two permanent magnet magnetic poles (1), the two magnetic pole groups are connected through the magnetic conductive sheet (3), a high-strength gradient magnetic field is formed by the polishing end of the excitation device, and when magnetorheological fluid flows through the magnetic field region, a flexible polishing ribbon is formed, and the surface of a workpiece is polished by the flexible polishing ribbon. Compared with the prior art, the excitation device can form a plurality of flexible polishing ribbons in a small range due to the expandability of the magnetic field, so that the polishing area is increased, and the working efficiency is improved; meanwhile, the flexible polishing ribbon has low hardness, is in elastic contact with the surface of a workpiece, cannot cause secondary damage to the workpiece in the processing process, and can realize high-precision and high-quality processing of the surface of the workpiece.
Description
Technical field
It is especially a kind of based on expanded type Magnetorheological Polishing the present invention relates to machining and theoretical simulation technical field
Excitation unit.
Background technique
With the development of science and technology, the surface shape precision, surface roughness of contemporary optics systems for optical part with
And the requirement of sub-surface damage degree is higher and higher, this constantly proposes new challenge to Optical manufacture technology.
The traditional diamond-making technique process-cycle is long, processing efficiency is low, and can not effectively control damage.Especially for big mouth
Diameter optical element, traditional processing can not be applied to its process due to the limitation of itself process well.
For traditional diamond-making technique there are the shortcomings that, occur include CCOS (computer controlled optical surfacing molding), from
A variety of polishing technologies including beamlet polishing, elastic emission polishing, Magnetorheological Polishing etc..These technologies are to meet optical element low
While damage manufacture requires, the high-precision processing of face shape can be realized to greatest extent, but in process, still deposit
It iterates in technique, the inevitable problem such as the process-cycle is long, this just gives the high-precision of optical elements of large caliber, low lacks
It falls into, high efficiency processing is put forward new requirements.
Summary of the invention
The present invention provides a kind of excitation unit based on expanded type Magnetorheological Polishing, for overcoming processing week in the prior art
Phase is long, processing efficiency is low, and can not effectively control the defects of damage, realizes efficient operation, and be able to achieve to element surface
In high precision, high quality is processed.
To achieve the above object, the present invention proposes a kind of excitation unit based on expanded type Magnetorheological Polishing, the excitation
Device mainly includes at least two magnetic pole groups and a piece of magnetic conduction sheet 3, and the magnetic pole group includes that two panels is stacked in the horizontal direction
Permanent magnet pole 1 and the connecting column 2 between two permanent magnet poles 1；The 1 vertical direction upper end of permanent magnet pole with
The connecting column 2 is fixedly connected by connector；
The 2 vertical direction lower end of connecting column is located in permanent magnet pole 1 described in two panels, and with permanent magnet magnetic described in two panels
The cavity for being set as an opening is enclosed jointly in pole 1；The cavities open is that two permanent magnet poles 1 are vertical in the groups of permanent magnet poles
Direction lower end circular arc minimum point horizontal direction gap, between 9~10mm；
The 1 vertical direction lower end of permanent magnet pole is arc-shaped, the inclined side of the intracavitary side of 1 near-space of permanent magnet pole
Along in 14~16 degree inclinations, the inclined side is along being in length on 14~16 degree of inclined directions with vertical direction with vertical direction
Between 34~36mm；The longitudinal width of the permanent magnet pole 1 is between 145~150mm；
The adjacent two magnetic pole group is stacked and is connected between two magnetic pole groups by magnetic conduction sheet 3, described two in the horizontal direction
Magnetic pole group is fixedly connected with the magnetic conduction sheet 3 by connector；3 horizontal breadth of magnetic conduction sheet is between 8~12mm.
Compared with prior art, the beneficial effects of the present invention are as follows:
1, excitation unit of the invention includes mainly magnetic pole group and magnetic conduction sheet 3, and the magnetic pole group includes two panels in level side
Stacked permanent magnet pole 1 and the connecting column 2 between two permanent magnet poles 1, the device overall structure are simple upwards；
Excitation unit vertical direction lower end will form high-intensitive gradient magnetic, and the magnetic field strength and shape are conducive to " flexibility throwing
The formation of light ribbon ", the hardness for being somebody's turn to do " flexible polishing ribbon " is low, is polished not with " the flexible polishing ribbon " to workpiece surface
Secondary damage can be formed to workpiece, it can be achieved that high-precision, the high quality of workpiece surface are processed；Again, the company of the excitation unit
Connect and be distributed with the processing efficiency significantly improved during Magnetorheological Polishing conducive to the extension of magnetorheological ribbon；In addition, entire
Device is not high to environmental requirement, and entire technical process is easily achieved.
2, excitation unit of the invention includes at least two magnetic pole groups, and the quantity of the magnetic pole group can increase according to demand,
Therefore a variety of different demands be can satisfy, has expanded the use scope of excitation unit of the present invention significantly.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is a kind of excitation unit front view based on expanded type Magnetorheological Polishing of the present invention；
Fig. 2 is a kind of excitation unit side view based on expanded type Magnetorheological Polishing of the present invention；
Fig. 3 is a kind of excitation unit structural schematic diagram based on expanded type Magnetorheological Polishing of the present invention；
Fig. 4 a is cavities open simulation result when being 2mm；
Fig. 4 b is cavities open simulation result when being 4mm；
Fig. 4 c is cavities open simulation result when being 6mm；
Fig. 4 d is cavities open simulation result when being 8mm；
Fig. 4 e is cavities open simulation result when being 9mm；
Fig. 4 f is cavities open simulation result when being 10mm；
Drawing reference numeral explanation: 1: permanent magnet pole, 2: connecting column, 3: magnetic conduction sheet.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 1 to Fig. 2 is please referred to, wherein x-axis direction indicates longitudinal in Fig. 2；Y-axis direction indicates horizontal direction；Z-axis indicates perpendicular
Histogram to.
The present embodiment provides a kind of excitation unit based on expanded type Magnetorheological Polishing, the excitation unit mainly includes two
A magnetic pole group and a piece of magnetic conduction sheet 3, the magnetic pole group include the permanent magnet pole 1 that two panels is stacked in the horizontal direction and be located at two
Connecting column 2 between the permanent magnet pole 1；The 1 vertical direction upper end of permanent magnet pole passes through with the connecting column 2 to be connect
Part is fixedly connected；
The 2 vertical direction lower end of connecting column is located in permanent magnet pole 1 described in two panels, and with permanent magnet magnetic described in two panels
The cavity for being set as an opening is enclosed jointly in pole 1；The cavities open is that two permanent magnet poles 1 are vertical in the groups of permanent magnet poles
Direction lower end circular arc minimum point horizontal direction gap is 9mm；
The 1 vertical direction lower end of permanent magnet pole is arc-shaped, the inclined side of the intracavitary side of 1 near-space of permanent magnet pole
Along in 14~16 degree inclinations, the inclined side is along being in length on 14~16 degree of inclined directions with vertical direction with vertical direction
For 35mm；The longitudinal width of the permanent magnet pole 1 is 150mm；
The adjacent two magnetic pole group is stacked and is connected between two magnetic pole groups by magnetic conduction sheet 3, described two in the horizontal direction
Magnetic pole group is fixedly connected with the magnetic conduction sheet 3 by connector；3 horizontal breadth of magnetic conduction sheet is 10mm.
The permanent magnet pole 1 and magnetic conduction sheet 3 are all made of and first form, after the mode that magnetizes be process, using described plus
Work mode is able to achieve the control to magnet magnetic direction.
The excitation unit, high-intensitive tonsure magnetic field are formed in its vertical direction lower end, which is polished end, the end institute
The region at place is polishing area.
Preferably, the excitation unit is wrapped in a hollow cylindrical polishing wheel, outer diameter 200mm, and internal diameter is
194mm；The horizontal direction of the excitation unit is arranged along the axial direction of the polishing wheel, under 1 vertical direction of permanent magnet pole
It is consistent with polishing camber of wheels to hold circular arc radian, and away from polishing wheel inner wall 1mm, to make the magnetic field strength of remote excitation unit polished end
Reduced levels are maintained, is conducive to magnetorheological fluid and changes from solid-state to liquid；The level of the 1 vertical direction upper end of permanent magnet pole
With a thickness of 10mm, the radial dimension phase of the permanent magnet pole 1 vertical direction height and polishing wheel circular hollow inner space
Match；1 material of permanent magnet pole is neodymium iron boron, has excellent magnetic property.
Preferably, 2 horizontal breadth of connecting column is 26.9mm；The 2 vertical direction height of connecting column is permanent magnet magnetic
The 1/3 of 1 vertical direction height of pole, the thickness and height will affect groups of permanent magnet poles vertical direction lower end cavity volume and
The size of the cavities open；2 longitudinal width of connecting column is consistent with 1 longitudinal width of permanent magnet pole, facilitates gradient magnetic
Field is formed in groups of permanent magnet poles vertical direction lower end；The material of the connecting column 2 is the pig iron, and the pig iron has hard, wear-resisting, casting
The property made waits well excellent properties.
Preferably, shape, vertical direction height, the longitudinal width of the magnetic conduction sheet 3 far connect with adjacent permanent magnet poles 1
It is consistent to connect 2 side of column, which is conducive to " flexible polishing ribbon " formation；The material of the magnetic conduction sheet 3 is neodymium iron boron, is had excellent
Magnetic property.
Preferably, the cavity is gradually reduced from vertical direction upper end to vertical direction lower end horizontal breadth, the structure
Cavity is conducive to magnetic field and is formed in groups of permanent magnet poles vertical direction lower end, and the magnetic field formed is gradient magnetic, is conducive to " soft
Property polishing ribbon " formation；The magnetorheological fluid is mixed by iron powder, polishing fluid, dispersing agent 150~225:45 in mass ratio~55:1
It closes.
Preferably, the connector is un-conducted magnetic material, such as: stainless steel, copper alloy avoid interfering magnetic field,
Stablize the performance of whole device.
Preferably, the design of the excitation unit field structure is realized by magnetic field simulation, the magnetic field simulation with
Solidworks is modeling software, Ansys is magnetic field simulation software, the magnetic field simulation to 1 longitudinal width of permanent magnet pole, forever
1 inclined side of magnet poles along nearly cavity side with vertical direction in the length on 14~16 degree of inclined directions, cavities open, magnetic conduction
3 horizontal breadth Parameter Conditions of piece optimize, and obtain excitation unit field structure parameters optimal value:
1 longitudinal width of permanent magnet pole is 150mm；1 inclined side of permanent magnet pole is being in vertical direction along nearly cavity side
Length on 14~16 degree of inclined directions is 35mm；Cavities open is 9mm；3 horizontal breadth of magnetic conduction sheet is 10mm.
When polishing wheel brings magnetorheological fluid in the gradient magnetic of polishing area high intensity into, magnetorheological fluid is constantly hardened, at
For with viscoplastic Bingham (Ben-Hur) medium, when polishing wheel takes magnetorheological fluid out of polishing area again, magnetorheological fluid becomes again
For fluid, it is convenient for recycling；Secondly, magnetorheological fluid forms " flexible polishing ribbon " under the action of gradient magnetic, it should " flexibility throwing
The hardness of light ribbon " is low, is polished to workpiece surface with " the flexible polishing ribbon " and will not form secondary damage to workpiece, can
Realize high-precision, the high quality processing of workpiece surface；Again, it the connection of the excitation unit and is distributed with conducive to magnetorheological ribbon
Extension, significantly improve the processing efficiency during Magnetorheological Polishing；In addition, whole device is not high to environmental requirement, entirely
Technical process is easily achieved.
Embodiment two
Referring to figure 3., wherein d: 1 longitudinal width of permanent magnet pole；2d1: 1 inclined side of permanent magnet pole exists along nearly cavity side
With vertical direction in the length on 14~16 degree of inclined directions；2d2: cavities open；2d3: 3 horizontal breadth of magnetic conduction sheet.
The present embodiment is using magnetic field simulation come the design parameter of excitation unit described in optimal enforcement example one, the magnetic field simulation
It is magnetic field simulation software by modeling software, Ansys of Solidworks, the magnetic field simulation is to the permanent magnet magnetic in field structure
1 longitudinal width of pole, 1 inclined side of permanent magnet pole along nearly cavity side with vertical direction in the length on 14~16 degree of inclined directions
Degree, cavities open, 3 horizontal breadth Parameter Conditions of magnetic conduction sheet optimize.
Specific step is as follows:
(1) first excitation unit being modeled using Solidworks, 1 longitudinal width of permanent magnet pole is set as 150mm,
1 inclined side of permanent magnet pole is being set as 10mm in the length on 14~16 degree of inclined directions with vertical direction along nearly cavity side,
Cavities open is respectively set to 2mm, 4mm, 6mm, 8mm, 9mm, 10mm, and 3 horizontal breadth of magnetic conduction sheet is set as 10mm；It uses again
When Ansys is emulated, the coercivity of permanent magnet pole 1 and magnetic conduction sheet 3 is respectively set to 10KOe and 12KOe, two permanent magnet magnetics
Pole group residual magnetic flux density is respectively set to 0.8T and 0.7T, and 3 residual magnetic flux density of magnetic conduction sheet is set as 0.8T, permanent magnet
1 polarization direction of magnetic pole along 1 vertical direction of permanent magnet pole, 3 polarization direction of magnetic conduction sheet in the horizontal direction, 1 material of permanent magnet pole
It is set as neodymium iron boron, 3 material of magnetic conduction sheet is set as Ru-Fe-Mn, and 2 material of connecting column is set as the pig iron, respectively to different cavities opens
Under the conditions of magnetic field strength and magnetic field shape emulated, simulation result is as shown in Fig. 4 a, 4b, 4c, 4d, 4e, 4f.
The formation of " flexible polishing ribbon " is related with the magnetic field strength of Z-direction and magnetic field shape, by simulation result it is found that with
The continuous increase of cavities open, the magnetic field " bulge " of polishing area is gradually smooth, and the magnetic field strength at peak value constantly subtracts
It is small, magnetic field strength, that is, Z-direction second " bulge " between two groups of permanent magnet poles groups, reduce more obvious.When cavities open is big
When 10mm, the magnetic field shape of Z-direction tends towards stability in the zone of action, and the design that magnetic field strength is unsatisfactory for being formed " bulge " is wanted
It asks；When gap is less than 9mm, Z-direction three " bulge " magnetic field strength difference are larger, can not be extended to multiple uniform " soft
Property polishing ribbon ".It wants strict control cavities open between 9~10mm, otherwise will will affect the intensity and shape in magnetic field.From imitative
From the point of view of true result, 1 vertical direction lower end inclined side of permanent magnet pole is along the opened gap final choice 9mm for forming cavity.
(2) method for using step (1), acquisition 1 longitudinal width optimal value of permanent magnet pole are 150mm；Permanent magnet pole 1
Inclined side in the length optimal value on 14~16 degree inclined directions is being 35mm with vertical direction along nearly cavity side；3 water of magnetic conduction sheet
Flat thickness optimal value is 10mm.
The magnetic field emulated under the excitation unit structural parameters, magnetic field strength and shape are all satisfied preset requirement, in circle
There is also the magnetic fields of about 10mT for circumferential direction, prevent magnetorheological fluid splashing in recycling.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (7)
1. a kind of excitation unit based on expanded type Magnetorheological Polishing, which is characterized in that the excitation unit mainly includes at least
Two magnetic pole groups and a piece of magnetic conduction sheet (3), the magnetic pole group include the permanent magnet pole (1) that two panels is stacked in the horizontal direction and
Connecting column (2) between two permanent magnet poles (1)；Permanent magnet pole (1) the vertical direction upper end and the company
Column (2) is connect to be fixedly connected by connector；
Connecting column (2) the vertical direction lower end is located in permanent magnet pole (1) described in two panels, and with permanent magnet magnetic described in two panels
The cavity for being set as an opening is enclosed jointly in pole (1)；The cavities open is two permanent magnet poles (1) in the groups of permanent magnet poles
Vertical direction lower end circular arc minimum point horizontal direction gap, between 9~10mm；
Permanent magnet pole (1) the vertical direction lower end is arc-shaped, the inclined side of the intracavitary side of permanent magnet pole (1) near-space
Along in 14~16 degree inclinations, the inclined side is along being in length on 14~16 degree of inclined directions with vertical direction with vertical direction
Between 34~36mm；The longitudinal width of the permanent magnet pole (1) is between 145~150mm；
The adjacent two magnetic pole group is stacked and is connected between two magnetic pole groups by magnetic conduction sheet (3), two magnetic in the horizontal direction
Pole group is fixedly connected with the magnetic conduction sheet (3) by connector；Magnetic conduction sheet (3) horizontal breadth is between 8~12mm.
2. a kind of excitation unit based on expanded type Magnetorheological Polishing as described in claim 1, which is characterized in that the excitation
Device is wrapped in a hollow cylindrical polishing wheel；The horizontal direction of the excitation unit is set along the axial direction of the polishing wheel
It sets, permanent magnet pole (1) the vertical direction lower end circular arc radian is consistent with polishing camber of wheels, and away from polishing wheel inner wall 1mm；Institute
The horizontal breadth of permanent magnet pole (1) vertical direction upper end is stated between 8~12mm, permanent magnet pole (1) vertical direction
Height and the radial dimension of polishing wheel circular hollow inner space match, between 130~140mm.
3. a kind of excitation unit based on expanded type Magnetorheological Polishing as described in claim 1, which is characterized in that the connection
Column (2) horizontal breadth is between 26~27mm；Connecting column (2) the vertical direction height is permanent magnet pole (1) vertical direction
The 1/3 of height；Connecting column (2) longitudinal width is consistent with permanent magnet pole (1) longitudinal width.
4. a kind of excitation unit based on expanded type Magnetorheological Polishing as described in claim 1, which is characterized in that the magnetic conduction
Shape, vertical direction height, longitudinal width connecting column (2) side remote with adjacent permanent magnet poles (1) of piece (3) are consistent.
5. a kind of excitation unit based on expanded type Magnetorheological Polishing as described in claim 1, which is characterized in that the cavity
From vertical direction upper end to vertical direction lower end, horizontal breadth is gradually reduced.
6. a kind of excitation unit based on expanded type Magnetorheological Polishing as described in claim 1, which is characterized in that the connection
Part is un-conducted magnetic material.
7. a kind of excitation unit based on expanded type Magnetorheological Polishing as described in any one of claims 1 to 6, feature exist
In the design of the excitation unit field structure is realized by magnetic field simulation, and the magnetic field simulation is to build with Solidworks
Mould software, Ansys are magnetic field simulation software, and the magnetic field simulation is to permanent magnet pole (1) longitudinal width, permanent magnet pole (1)
Inclined side is along nearly cavity side horizontal in the length on 14~16 degree of inclined directions, cavities open, magnetic conduction sheet (3) with vertical direction
Thickness parameter condition optimizes, and obtains excitation unit field structure parameters optimal value:
Permanent magnet pole (1) longitudinal width is 150mm；Permanent magnet pole (1) inclined side is being in vertical direction along nearly cavity side
Length on 14~16 degree of inclined directions is 35mm；Cavities open is 9mm；Magnetic conduction sheet (3) horizontal breadth is 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567497.XA CN109500662B (en) | 2018-12-20 | 2018-12-20 | Excitation device based on extension formula magnetic current becomes polishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567497.XA CN109500662B (en) | 2018-12-20 | 2018-12-20 | Excitation device based on extension formula magnetic current becomes polishing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109500662A CN109500662A (en) | 2019-03-22 |
| CN109500662B true CN109500662B (en) | 2019-11-15 |
Family
ID=65754041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811567497.XA Active CN109500662B (en) | 2018-12-20 | 2018-12-20 | Excitation device based on extension formula magnetic current becomes polishing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109500662B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114055258B (en) * | 2021-11-19 | 2023-04-18 | 浙江师范大学 | Magnetic polishing device and magnetic polishing control method |
| CN115157019A (en) * | 2022-08-18 | 2022-10-11 | 中国人民解放军国防科技大学 | Wheel ring type magnetorheological polishing head and magnetorheological polishing machine tool |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3112542B2 (en) * | 1992-01-24 | 2000-11-27 | オリンパス光学工業株式会社 | Ultrasonic polishing equipment |
| CN101564824B (en) * | 2009-06-05 | 2010-11-03 | 湖南大学 | Method and device for polishing magneto-rheological inclined shaft |
| CN203608056U (en) * | 2013-12-20 | 2014-05-21 | 谢胜利 | Excitation device |
| CN204836013U (en) * | 2015-07-17 | 2015-12-02 | 宁夏大唐国际青铜峡风电有限责任公司 | Converter exciting arrangement is directly driven to high -power electric excitation |
| KR20180067551A (en) * | 2015-10-15 | 2018-06-20 | 유겐가이샤 유웨이브 | Vibration excitation method, ultrasonic processing method, and ultrasonic transmission method of a lancher semi-ultrasonic vibrator |
| CN105703191B (en) * | 2016-03-30 | 2018-07-03 | 梁忠国 | Excitation unit |
| CN205726497U (en) * | 2016-06-08 | 2016-11-23 | 浙江科技学院 | A kind of excitation unit |
| CN207616256U (en) * | 2017-12-25 | 2018-07-17 | 山东科技大学 | Magnetorheological finishing device |
-
2018
- 2018-12-20 CN CN201811567497.XA patent/CN109500662B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109500662A (en) | 2019-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109500662B (en) | Excitation device based on extension formula magnetic current becomes polishing | |
| CN109396968B (en) | Semi-closed extension formula magnetic current becomes burnishing device | |
| CN107413916B (en) | A kind of tubing Electromagnetic bulging forming device and method | |
| CN107825230B (en) | A kind of resultant field formula Magnetorheological Polishing head | |
| CN202241933U (en) | Water film sizing sleeve | |
| CN204935106U (en) | The double walled crossbeam of Longmen machine tool | |
| CN109988508A (en) | A kind of silica solution based magnetic rheologic metal-polishing liquid and its preparation method and application | |
| CN209551442U (en) | A kind of tile style dowel hole honing head | |
| CN201508739U (en) | Permanent magnet for magnetic resonance imaging system | |
| CN215859060U (en) | Adjustable combined die for forming abutment for floor stand | |
| KR101718591B1 (en) | 3d printer for fabricating permanent magnet | |
| CN109680220A (en) | A kind of production technology and its mobile phone Kato of mobile phone Kato | |
| CN205587656U (en) | A mould for sintered nd -Fe -B die mould | |
| CN201331993Y (en) | Permanent magnet for magnetic resonance imaging system | |
| CN205194457U (en) | Mould that bonding neodymium iron boron tile magnetic sheet magnetized | |
| CN101552079B (en) | Permanent magnet used for magnetic resonance imaging system | |
| CN100584526C (en) | Precision processing method for non-magnetic conduct material minitype flange bearing outer surface | |
| Chow et al. | Development on silicon rubber elastic composite magnetic abrasive and research on internal polishing | |
| CN202317012U (en) | Radial magnetizing NdFeB (neodymium iron boron) mould | |
| CN210254234U (en) | Magnetic core mould | |
| CN201279589Y (en) | Radial magnetized neodymium ferrum boron die | |
| CN216119767U (en) | Rare earth neodymium iron boron permanent magnet | |
| CN207294280U (en) | A kind of magnetising assembly and the outer formula water magnetizing apptss of pipe | |
| CN117038310B (en) | Magnetic powder orientation forming device for sintered NdFeB magnet production | |
| CN109834241A (en) | A kind of sand core structure for realizing booster intake elbow high-pressure casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |