CN108311961A - A kind of circulation static pressure type magnetorheological finishing device - Google Patents
A kind of circulation static pressure type magnetorheological finishing device Download PDFInfo
- Publication number
- CN108311961A CN108311961A CN201810379340.8A CN201810379340A CN108311961A CN 108311961 A CN108311961 A CN 108311961A CN 201810379340 A CN201810379340 A CN 201810379340A CN 108311961 A CN108311961 A CN 108311961A
- Authority
- CN
- China
- Prior art keywords
- rubbing head
- workpiece
- excitation unit
- static pressure
- pressure type
- 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.)
- Granted
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 18
- 230000005284 excitation Effects 0.000 claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 abstract description 25
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000518 rheometry Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000029052 metamorphosis Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 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
Abstract
The invention discloses a kind of circulation static pressure type magnetorheological finishing device, including excitation unit, magnetorheological fluid, rubbing head, there is cavity in rubbing head, it is circumferentially distributed to there is hole, surface to have subtle pit.Rubbing head is installed on workpiece inner wall center position, and workpiece is installed in the magnetic field range of excitation unit generation.Excitation unit includes permanent magnet and electromagnet, size by controlling excitation unit electric current can control the size of magnetic field intensity, and then the curing degree of the magnetorheological fluid between rubbing head and workpiece inner wall is controlled, to realize the shear removal in rubbing head and workpiece relative motion to workpiece surface material.The configuration of the present invention is simple, compact, controllability are strong, under the turning effort of workpiece, magnetorheological fluid is flowed out from three rectangular openings on rubbing head, pressure is evenly applied to the surface of workpiece, isostatic pressed may be implemented in inside workpiece, by the relative motion of rubbing head and workpiece, the polishing treatment to workpiece inner wall surface is completed.
Description
Technical field
The present invention relates to Magnetorheological Polishing field more particularly to a kind of being processed to elongated non-magnetic pipe internal surface
Circulation static pressure type magnetorheological finishing device.
Background technology
Technique of Magnetorheological Finishing is a kind of Ultra-precision Turning that the rheological characteristic using magnetorheological fluid in magnetic field is polished
Method.What magnetorheological fluid was mainly mixed by the liquid of high magnetic permeability, low hysteresis small soft magnetic granules and non-magnetic
Suspended substance.Has the characteristics that magnetic characteristic, rheological characteristic and stability.
Exactly using magnetorheological fluid in gradient magnetic rheology occurs for Technique of Magnetorheological Finishing and what is formed there is viscous modeling to go
For flexibility " small abrasive nose " quick relative motion between workpiece, make workpiece surface by prodigious shearing force, to make work
The polishing method that part surfacing is removed.
Technique of Magnetorheological Finishing is a kind of polishing method between contact polishing and contactless polishing, is polished with tradition
Method is compared, and has polishing precision high, no tool wear, clogging, and removal rate is high and the advantages that not introducing sub-surface damage,
Nearly zero sub-surface damage and nano-precision polishing can be achieved.
The prior art (such as Chinese patent literature CN1486821A and Chinese patent literature CN106736879A) is public
The embodiment for having opened Technique of Magnetorheological Finishing specifically discloses the technical solution being polished for outer surface of workpiece, still
Since plant area is big and is only capable of being polished outer surface of workpiece, application scenarios are greatly limited.
In order to solve the above-mentioned technical problem, a kind of in tubular workpiece disclosed in Chinese patent literature CN107825230A
The resultant field formula Magnetorheological Polishing head of wall polishing, specifically discloses the resultant field formula magnetic being polished to tubular workpiece inner wall
Rheology rubbing head realizes the spatial volume reduced shared by excitation unit and the polishing operation realized to pipe material inner wall.
However in technical solution disclosed in CN107825230A, although the volume of device entirety has greatly reduced, so
And the volume of rubbing head is still larger, diameter is thick, can not complete the polishing operation to superfine pipe material inner wall.
Invention content
(1) technical problems to be solved
The skill that operation is polished to superfine pipe material inner wall can not be completed greatly to solve existing magnetorheological finishing device volume
Art problem, the present invention provide a kind of circulation static pressure type magnetorheological finishing device.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include：
2, a kind of circulation static pressure type magnetorheological finishing device, including excitation unit, magnetorheological fluid, rubbing head are provided, it is described
Excitation unit includes permanent magnet and electromagnet, and the rubbing head is discretely fixed at the excitation dress relative to excitation unit
In magnetic field range caused by setting, the rubbing head includes cavity, and the magnetorheological fluid is contained in the cavity, the polishing
The circumferentially distributed of head has hole, to make magnetorheological fluid be flowed out from the cavity under the excitation of excitation unit.
According to the present invention, the surface of rubbing head is acted on by micro- milling, and the surface of otherwise smooth is provided with subtle pit can band
Dynamic magnetorheological fluid is performed relative motion with workpiece.
According to the present invention, electromagnet includes U-iron core and magnet exciting coil, and the magnet exciting coil is wrapped in U magnet both sides,
Electromagnet opening both ends are parallel to be relatively fixed two pieces of opposite polarity permanent magnets of connection.
According to the present invention, rubbing head diameter is less than workpiece to be processed about 1mm~3mm, preferably 2mm.According to the present invention, excitation
Permanent magnet in device selects ndfeb magnet.
According to the present invention, rubbing head is non-magnet material.
According to the present invention, Kong Weisan circumferentially distributed rectangular opening of rubbing head is divided into 120 ° between adjacent two rectangular openings.
(3) advantageous effect
The beneficial effects of the invention are as follows：It is simple in structure, compact, strong without cooling device, controllability.
The rubbing head of the present invention and the contactless setting of excitation unit, eliminate excitation unit to rubbing head design size band
The limitation come.There is cavity that can store magnetorheological fluid in rubbing head, the circumferentially distributed of rubbing head has hole, to make magnetorheological fluid encourage
It is flowed out from the cavity under the excitation of magnetic device, multiple pits are distributed in polishing head surface, can drive magnetorheological fluid and workpiece
Performing relative motion makes the magnetorheological fluid of isostatic pressed, and pressure is delivered evenly to the inner wall of workpiece.Excitation unit by electromagnet and
Permanent magnet combines, and compared with simple permanent magnet or electromagnet, by introducing resultant field, improves the controllability in magnetic field
And dynamic, the adjustable extent of increasing magnetic field, the required electric current smaller of magnetic field intensity, coil turn smaller are adjusted,
The generation for reducing excitation unit heat reduces the volume of excitation unit, and the accurate of polishing area magnetic field size may be implemented
It adjusts.Excitation unit is detached with rubbing head outside rubbing head, and rubbing head volume is made to become smaller, and structure simplification is, it can be achieved that pole
The polishing operation of thin pipe material inner wall.
Description of the drawings
Fig. 1 is cross-sectional view of the present invention；
Fig. 2 is the partial enlarged view of rubbing head of the present invention.
【Reference sign】
1：Magnet frame iron core；
2：Ndfeb magnet；
3：Workpiece；
4：Rubbing head；
5：Magnetorheological fluid；
6：Magnet exciting coil.
Specific implementation mode
In order to preferably explain the present invention, in order to understand, below in conjunction with the accompanying drawings, by specific implementation mode, to this hair
It is bright to be described in detail.
The present invention provides a kind of circulation static pressure type magnetorheological finishing device, using magnetorheological fluid in certain magnetic field strength range
Interior curing degree is polished by the principle that magnetic field intensity is influenced.Magnetorheological fluid is semi-solid state, surrender under magnetic fields
Stress significantly increases, and in a certain range, and the size of yield stress increases with the enhancing of magnetic field intensity.
As shown in Figure 1, being pedestal with U-iron core 1, magnet exciting coil 6 is wrapped in 1 both sides of U-iron core, the opening of U-iron core
Place both ends are fixedly connected with two blocks of opposite polarity NdFeB Permanent Magnets magnet 2 and collectively form excitation unit.
Correspondingly, the setting of rubbing head 4 is formed by U-shaped iron core opening in magnetic field range, it is preferable that is arranged at two pieces
Symmetrical center positions between NdFeB Permanent Magnets magnet 2.
As shown in Fig. 2, rubbing head is column, it is arranged axially along the thickness direction of U-iron core.Rubbing head both ends are by keeping
Mechanism is fixedly supported.The holding mechanism is kept from rubbing head both ends, can be by providing axial chucking power to rubbing head
To realize.The holding structure is designed with not interfered with workpiece for standard, for example, radial direction size be less than etc.
In the radial dimension of rubbing head, any mode in the prior art may be used in concrete structure, and the present invention is without limitation.It borrows
Help this mode, rubbing head is separately formed relative to excitation unit, therebetween keep separation, that is to say, that the two it
Between there is no the connecting portions in structure.
Workpiece 3 makees the high speed rotary motion around 3 central shaft of workpiece with respect to rubbing head 4, and the circle in workpiece 3 is arranged in rubbing head 4
In bore, relative to the cylindrical bore arranged concentric, workpiece 3 is relative to rubbing head 4 along the cylindrical bore of workpiece
Central axial direction do reciprocating linear motion.Specifically, in polishing process, excitation unit and rubbing head 4 are opposing stationary, work
Part 3 does the linear reciprocating motion along central axial direction relative to excitation unit and rubbing head.It can make the thickness of U-iron core in this way
Degree is thinner, further has compressed the volume of circulation static pressure type magnetorheological finishing device provided by the invention.
As shown in Fig. 2, rubbing head 4 is the interior column structure for having cavity, the preferably described cavity it is closed at both ends.Rubbing head 4
Circumferential uniformly branch three between be divided into 120 ° of rectangular opening, trepanning, which is rectangle, can reduce lateral groove width, be spaced 120 °
Magnetorheological fluid 5 can be allowed more uniformly smoothly to flow out, the excessive pressure of trepanning can not be constant, and hole is very few can not to ensure magnetorheological fluid 5
Flow meet polishing demand.4 diameter of rubbing head is less than workpiece 3 diameter about 1mm~3mm, and polishing clearance is excessive not to have effect, throws
The too small inconvenience that rubbing head 4 can be caused to install in light gap, difficulty increases, when workpiece 3 is with 4 relative motion of rubbing head, due to device
Vibration itself is might have, rubbing head 4 can be caused to be contacted with 3 surface of workpiece, 3 surface of workpiece is scratched, so the present invention is preferred
2mm makes to form the reasonable clearance that can accommodate magnetorheological fluid 5 between rubbing head 4 and workpiece 3.4 surface of rubbing head adds by micro- milling
Work has subtle pit, and the magnetorheological fluid contributed in gap is attached to 4 surface of rubbing head.
When work, the magnetic field that the energization of magnet exciting coil 6 makes the magnetic field of excitation unit generation be generated with ndfeb magnet 2 is stacked
Add, when the magnetic field that electromagnet generates is identical as permanent magnet magnetic field direction, the total magnetic intensity enhancing that excitation unit generates, magnetic current
Become 5 curing degree of liquid to increase；When the magnetic field that electromagnet generates is opposite with permanent magnet magnetic field direction, the total magnetic field of excitation unit is strong
Degree reduces, and magnetorheological fluid curing degree reduces.Magnetic current can be controlled by adjusting by the direction of field coil current and size
Becoming the curing degree of liquid, curing degree is the metamorphosis that magnetorheological fluid is generated with the variation in magnetic field, and curing degree is bigger,
The intensity for the magnetic linkage that magnetorheological fluid is formed is bigger, destroys the required shearing force of this chain structure in vertical direction also more
Greatly.Theoretically, in a certain range, can improve as cured degree increases polishing effect, super to go beyond the scope, polishing effect
It can be deteriorated.
It, can only be by adjusting permanent magnet compared to simple using permanent magnet as the magnetorheological fluid burnishing device of excitation unit
The spacing that surface is polished with the spacing or buff spindle outer wall and workpiece of buff spindle inner wall to adjust the magnetic of polishing area indirectly
The excitation unit of field intensity, circulation static pressure type magnetorheological finishing device provided by the present invention detaches with rubbing head and adds electricity
Magnet makes the more accurate adjustable extent bigger of adjusting of the magnetic field intensity of excitation unit generation improve controllability；Compared to simple
Magnetorheological fluid burnishing device using electromagnet as excitation unit, the magnetic field intensity to reach needs, which need to increase, passes through excitation wire
The size of current of circle, the coil turn for increasing magnet exciting coil make device volume increase, are serious using fever for a long time, the present invention
The circulation static pressure type magnetorheological finishing device provided increases permanent magnet, and excitation unit takes up space small, and calorific value is small, generates
Heat can shed in time, do not interfere with the temperature of the magnetorheological fluid of polishing area, be not required to design special cooling body.
Magnetorheological fluid 5 is transported in the cavity of rubbing head 3, the magnetorheological fluid 5 in rubbing head 4 and 3 relative motion of workpiece
It is flowed into the gap between workpiece 3 and rubbing head 4 from the rectangular opening on rubbing head 3, with relatively high between workpiece and rubbing head
The rotary motion of speed is closed space between tube wall and rubbing head, and the magnetorheological fluid in rubbing head uniformly flows out, can be formed etc.
Pressure is delivered evenly to the inner wall of workpiece by the magnetorheological fluid of static pressure.The subtle pit on 4 surface of rubbing head, can store magnetic
Rheology liquid 5, and drive magnetorheological fluid 5 opposite when workpiece 3 is made with respect to rubbing head 4 around the high speed circumferential movement of 3 central shaft of workpiece
It is moved in workpiece 3, bears the frictional resistance from 3 inner surface of workpiece, realize the shear removal to 3 inner surface of workpiece.
Since excitation unit is detached with rubbing head 4 outside rubbing head 4, the diameter of rubbing head 4 is made to can reach minimum,
It can complete the polishing operation to superfine internal surface of pipe.Although being pointed out that the present invention can be to table in superfine tubing
Face is polished operation, but is not limited to be polished operation to superfine internal surface of pipe.Value of the invention is that eliminating
Limitation of the excitation unit to polishing area of bed is not meant to that the present invention can be used only in the polishing of superfine internal surface of pipe.
It is to be appreciated that describing the skill simply to illustrate that the present invention to what specific embodiments of the present invention carried out above
Art route and feature, its object is to allow those skilled in the art to can understand the content of the present invention and implement it accordingly, but
The present invention is not limited to above-mentioned particular implementations.Every various change made within the scope of the claims is repaiied
Decorations should all be covered within the scope of the present invention.
Claims (7)
1. a kind of circulation static pressure type magnetorheological finishing device, including excitation unit, magnetorheological fluid, rubbing head, it is characterised in that：Institute
It includes permanent magnet and electromagnet to state excitation unit, and the rubbing head is discretely fixed at the excitation relative to excitation unit
In magnetic field range caused by device, the rubbing head includes cavity, and the magnetorheological fluid is contained in the cavity, the throwing
The circumferentially distributed of shaven head has hole, to make magnetorheological fluid be flowed out from the cavity under the excitation of excitation unit.
2. a kind of circulation static pressure type magnetorheological finishing device according to claim 1, it is characterised in that：The rubbing head table
EDS maps have multiple pits.
3. a kind of circulation static pressure type magnetorheological finishing device according to claim 1, it is characterised in that：The rubbing head is straight
Diameter is less than workpiece to be processed diameter 1mm~3mm.
4. a kind of circulation static pressure type magnetorheological finishing device according to claim 1, it is characterised in that：The rubbing head week
To the rectangular opening of Kong Weisan uniform branches of distribution, 120 ° are divided between adjacent two rectangular openings.
5. a kind of circulation static pressure type magnetorheological finishing device according to claim 1, it is characterised in that：The electromagnet packet
U-iron core and magnet exciting coil are included, the magnet exciting coil is wrapped in U magnet both sides, the parallel phase in electromagnet opening both ends
To being fixedly connected with two pieces of opposite polarity permanent magnets.
6. a kind of circulation static pressure type magnetorheological finishing device according to claim 5, it is characterised in that：The excitation unit
In permanent magnet be ndfeb magnet.
7. according to a kind of circulation static pressure type magnetorheological finishing device of claim 1~6 any one of them, it is characterised in that：Institute
It is non-magnet material to state rubbing head material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379340.8A CN108311961B (en) | 2018-04-25 | 2018-04-25 | Circulation static pressure type magnetorheological polishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379340.8A CN108311961B (en) | 2018-04-25 | 2018-04-25 | Circulation static pressure type magnetorheological polishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108311961A true CN108311961A (en) | 2018-07-24 |
| CN108311961B CN108311961B (en) | 2019-12-10 |
Family
ID=62894719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810379340.8A Expired - Fee Related CN108311961B (en) | 2018-04-25 | 2018-04-25 | Circulation static pressure type magnetorheological polishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108311961B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109773604A (en) * | 2018-12-26 | 2019-05-21 | 河海大学常州校区 | A kind of automatic controllable device and method of removal intersection hole bur |
| CN110064997A (en) * | 2019-06-05 | 2019-07-30 | 中国工程物理研究院机械制造工艺研究所 | Mangneto rheological deformation effect burnishing device and method for thin wall special-shaped curved surface |
| CN112139970A (en) * | 2020-10-09 | 2020-12-29 | 豪利机械(苏州)有限公司 | Method for polishing inner wall of conical hole |
| CN113910009A (en) * | 2021-10-18 | 2022-01-11 | 台州学院 | Magnetorheological fluid polishing bullet polishing machine |
| CN113977360A (en) * | 2021-10-18 | 2022-01-28 | 台州学院 | Reciprocating type automatic control rotating magnetic field magneto-rheological polishing machine |
| CN114102420A (en) * | 2021-11-16 | 2022-03-01 | 台州学院 | Multistage constant-speed self-circulation magnetorheological polishing machine |
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| CN104308671A (en) * | 2014-10-09 | 2015-01-28 | 东北大学 | Magnetorheological polishing device and method |
| CN205520755U (en) * | 2016-04-13 | 2016-08-31 | 童和平 | Finger -like electromagnet structure magnetic current becomes throwing optical equipment |
| CN206305892U (en) * | 2016-12-12 | 2017-07-07 | 东北大学 | A kind of roller type magnetorheological finishing device |
| CN107791107A (en) * | 2017-11-16 | 2018-03-13 | 东北大学 | A kind of titanium alloy tube inwall magnetic rheological polishing method and device |
| CN107825230A (en) * | 2017-11-23 | 2018-03-23 | 东北大学 | A kind of resultant field formula MRF head |
| CN207155395U (en) * | 2017-08-25 | 2018-03-30 | 河北工程大学 | A kind of magnetic flow liquid burnishing device |
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2018
- 2018-04-25 CN CN201810379340.8A patent/CN108311961B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308671A (en) * | 2014-10-09 | 2015-01-28 | 东北大学 | Magnetorheological polishing device and method |
| CN205520755U (en) * | 2016-04-13 | 2016-08-31 | 童和平 | Finger -like electromagnet structure magnetic current becomes throwing optical equipment |
| CN206305892U (en) * | 2016-12-12 | 2017-07-07 | 东北大学 | A kind of roller type magnetorheological finishing device |
| CN207155395U (en) * | 2017-08-25 | 2018-03-30 | 河北工程大学 | A kind of magnetic flow liquid burnishing device |
| CN107791107A (en) * | 2017-11-16 | 2018-03-13 | 东北大学 | A kind of titanium alloy tube inwall magnetic rheological polishing method and device |
| CN107825230A (en) * | 2017-11-23 | 2018-03-23 | 东北大学 | A kind of resultant field formula MRF head |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109773604A (en) * | 2018-12-26 | 2019-05-21 | 河海大学常州校区 | A kind of automatic controllable device and method of removal intersection hole bur |
| CN110064997A (en) * | 2019-06-05 | 2019-07-30 | 中国工程物理研究院机械制造工艺研究所 | Mangneto rheological deformation effect burnishing device and method for thin wall special-shaped curved surface |
| CN112139970A (en) * | 2020-10-09 | 2020-12-29 | 豪利机械(苏州)有限公司 | Method for polishing inner wall of conical hole |
| CN113910009A (en) * | 2021-10-18 | 2022-01-11 | 台州学院 | Magnetorheological fluid polishing bullet polishing machine |
| CN113977360A (en) * | 2021-10-18 | 2022-01-28 | 台州学院 | Reciprocating type automatic control rotating magnetic field magneto-rheological polishing machine |
| CN113910009B (en) * | 2021-10-18 | 2023-08-15 | 台州学院 | Magnetorheological fluid polishing bullet polishing machine |
| CN113977360B (en) * | 2021-10-18 | 2023-08-25 | 台州学院 | Reciprocating self-control rotary magnetic field magneto-rheological polishing machine |
| CN114102420A (en) * | 2021-11-16 | 2022-03-01 | 台州学院 | Multistage constant-speed self-circulation magnetorheological polishing machine |
| CN114102420B (en) * | 2021-11-16 | 2024-01-30 | 台州学院 | Multistage uniform-speed self-circulation magnetorheological polishing machine |
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