CN104290038A - High-flow magnetorheogical fluid recycling device - Google Patents
High-flow magnetorheogical fluid recycling device Download PDFInfo
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- CN104290038A CN104290038A CN201410508382.9A CN201410508382A CN104290038A CN 104290038 A CN104290038 A CN 104290038A CN 201410508382 A CN201410508382 A CN 201410508382A CN 104290038 A CN104290038 A CN 104290038A
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- magnetic flow
- flow liquid
- polishing
- polishing wheel
- magnetorheogical
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- 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
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
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- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to a high-flow magnetorheogical fluid recycling device. The device comprises a recycling head which is arranged nearby the position where magnetorheogical fluid just breaks away from a polishing area and keeps flexible linear contact with a polishing wheel, and a vacuum generating device, wherein the recycling head is used for receiving the magnetorheogical fluid thrown out of the bottom of the polishing wheel, and the vacuum generating device is used for providing power for recycling the magnetorheogical fluid. According to the recycling device, a recycling connector is arranged nearby the position where the magnetorheogical fluid just breaks away from the polishing area, at the moment, the magnetic field intensity is moderate, it can be guaranteed that the magnetorheogical fluid is smoothly separated from the polishing wheel, the magnetic field force intensity can also be guaranteed, and therefore the rotating speed of the polishing wheel and the size of a nozzle can be increased, and the polishing efficiency is increased from two aspects.
Description
Technical field
The invention belongs to precision optics polishing technical field, relate to a kind of large discharge magnetic flow liquid retracting device.
Background technology
Technique of Magnetorheological Finishing starts from the seventies in last century, former Soviet Union's Study on Heat and Mass Transfer in 1974 W.I.Kordonski magnetic flow liquid is used in machining.To the beginning of the nineties in last century, W.I.Kordonski cooperates with optics manufacturing center of University of Rochester of the U.S., proposes and demonstrates the concept of certainty Technique of Magnetorheological Finishing for aspherical mirror machining.In recent years, U.S. QED company pushes Technique of Magnetorheological Finishing to commercialization.
At present, the National University of Defense technology is leading to this technical research in China, and they have the polishing machine of independent research, and at polishing algorithm, especially in the error analysis of lathe, has done deep research, obtained good achievement in research.
Present widely used magnetorheological finishing device, primarily of driving wheel mechanical system and magnetic flow liquid circulatory system composition.Magnetic flow liquid is made up of carrier fluid, ferromagnetic microparticles, grinding and polishing agent and auxiliary additive.Working mechanism is that the rheological characteristic utilizing magnetic flow liquid in magnetic field carries out polishing to workpiece, magnetic flow liquid brings polishing area into by polishing wheel, and in the gradient magnetic of polishing area high strength, magnetic flow liquid is hardening, become and there is viscoplastic Bingham medium, and form ribbon projection.When this medium flows through the slit between workpiece and moving coil, larger shearing force is produced to the region that surface of the work contacts with it, realize workpiece material and remove.The size and shape of polishing area " flexible polishing mould " can be controlled in real time by burnishing parameters (polishing wheel rotating speed, polishing wheel and optical element distance etc.), the stability of grinding head for polishing under this polishing condition can be guaranteed again, thus realize processing the certainty of surface of the work.
Technique of Magnetorheological Finishing obtains and uses widely in the processing of small-bore optical element, achieves good polishing effect.But for optical elements of large caliber, because the cube of optical element material removal amount with bore increases, SiC material also has the feature that hardness is high, wearability is good, polishing efficiency becomes the outstanding problem of its application of restriction.In the present case, increase polishing efficiency, mainly contain 2 approach:
1, use larger magnetic flow liquid supply shower nozzle, thus improve height and the width of ribbon projection, increase and remove function area;
2, improve removal efficiency and improve polishing wheel movement velocity, the raising of linear velocity can promote the speed that unit interval bistrique takes away surface of the work material, thus improves removal efficiency.
And these 2 are all had higher requirement to magnetic flow liquid supply circulation rate, there is not restricted problem in current supply respect and magnetic field intensity aspect, polishing area, but the recovery of large discharge magnetic flow liquid is the key that restriction MRF is processed for optical elements of large caliber high efficiency always.One of them major reason is that optical elements of large caliber and small-bore element mounting means exist very large difference.
For small-bore element, the mounting means of existing MRF is: polishing wheel is in fixed position rotation, polishing fluid circulates above polishing wheel, and form ribbon projection, the machined surface of workpiece down, with the relative motion of ribbon projection, workpiece with fixture in spatial movement, can complete polishing process simultaneously.The benefit of this mounting means is: magnetic flow liquid under gravity, can directly reclaim after departing from polishing area, very convenient.And for optical elements of large caliber, due to its quality and bulky, widely used mounting means in small-bore processing can not be continued to use.
At present for the optical manufacturing of 1m magnitude and above bore, the frock of employing is: workpiece is fixed on static on turntable or slowly rotates with turntable, and machined surface upward, the polishing wheel side of being located thereon, magnetic flow liquid enters below polishing wheel, forms ribbon projection, with machined surface relative motion.The recovery of existing polishing fluid, be utilize magnet at the magnetic fields in non-polished district, magnetic flow liquid is adsorbed on polishing wheel, until by after peak, use and reclaim joint under gravity, it separated from polishing wheel.Such endless form has imitated small-bore way of recycling, utilizes the Weak magentic-field in non-polished district, makes it move with polishing wheel, peaks.
But such circulation and stress mode directly limit the maximum stream flow of magnetic flow liquid, because non-polished district magnetic field intensity differs more than ten doubly with polishing area, larger shower nozzle means more magnetic flow liquid, this proposes larger requirement to non-polished district magnetic field force, and when polishing area optimum magnetic field intensity is fixed, magnetic field, non-polished district has also just been limited.Removal efficiency and the positive correlation of polishing wheel rotating speed in addition, and rotating speed is excessive, magnetic field force is not enough to provide polishing fluid absorption affinity, and magnetic flow liquid can be thrown out of polishing wheel, can not reclaim smoothly.
Summary of the invention
The present invention, in order to solve the problem of existing magnetic flow liquid retracting device limited flow and rotating speed, provides a kind of large discharge magnetic flow liquid retracting device.
In order to solve the problems of the technologies described above, technical scheme of the present invention is specific as follows:
A kind of large discharge magnetic flow liquid retracting device, comprising:
Be arranged on the neighbouring position that magnetic flow liquid has just departed from polishing area, the recovery head keeping flexible wires to contact with polishing wheel, it goes for receiving by the magnetic flow liquid thrown away bottom polishing wheel;
The vacuum generating device be connected with described recovery head, it is used to provide the power reclaiming magnetic flow liquid.
In technique scheme, described recovery head is also connected with gravitational separation device, and it comprises: the recovery tube be connected with described recovery head and the separation member be connected with described recovery tube;
Described separation member can make the magnetic flow liquid that sucked by described recovery head under gravity with air separation.
In technique scheme, described separation member is also connected with base, is provided with the separate blade that can be driven by power transmission shaft by servomotor in this base; The separate blade rotated can make magnetic flow liquid and portion of residual air carry out secondary separation.
In technique scheme, described base is connected with discharge pipe, and this discharge pipe is connected with the circulating slot of magnetic flow liquid.
In technique scheme, described vacuum generating device is vavuum pump or vacuum generator.
The present invention has following beneficial effect:
Recovery jiont treatment has just departed near polishing area at magnetic flow liquid by retracting device of the present invention, now magnetic field intensity is moderate, both can ensure that magnetic flow liquid can be separated with polishing wheel smoothly, magnetic field force intensity can be ensured again, thus polishing wheel rotating speed and jet size can be improved, increase polishing efficiency from two aspects.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 uses this device, magnetorheological circulation and stress jiont treatment position view
Fig. 2 is large discharge magnetic flow liquid retracting device axonometric drawing
Fig. 3 is this device median plane sectional view
Fig. 4 is separate blade axonometric drawing
Reference numeral in figure is expressed as:
1, magnetic flow liquid ribbon projection, 2, shower nozzle, 3, polishing wheel; 4, joint is reclaimed, 5, workpiece, 6, gas-liquid recovery pipe; 7, base, 8, separation member, 9, fixed head; 10, guard box, 11, middle plate, 12, connecting plate; 13, location-plate, 14, servomotor, 15, inner shield ring; 16, outer back-up ring, 17, bearing, 18, outer shaft; 19, internal axle sleeve; 20, power transmission shaft, 21, securing member, 22, separate blade; 23, blast pipe; 24, magnetic flow liquid discharge pipe, 25, oil water separator, 26, vacuum generator.
Detailed description of the invention
Invention thought of the present invention is: the invention provides a kind of Novel magnetorheological fluid retracting device, can transform on existing MRF lathe, without the need to changing the original frame for movement of lathe.
This device is made up of gas-liquid separation device subsystem and vacuum generation subsystem.Vacuum generation subsystem is the power set reclaimed, and gas-liquid separation device subsystem completes gas-liquid separation, and completes cyclic process.Reclaiming head keeps flexible wires to contact with polishing wheel, makes magnetic flow liquid also polishing wheel separation.
Feature of the present invention is: recovery head is arranged on the areas adjacent that magnetic flow liquid has just departed from polishing, now magnetic field intensity decays to some extent than polishing area, but compared to original non-polished district intensity, still more than three times.This both ensure that the absorption affinity reclaimed near head, made again recovery port depart from not so difficulty.The flexible end reclaiming head keeps Sutureless to contact with polishing wheel, both can ensure that magnetic flow liquid can be separated with polishing wheel completely, can not have obvious frictional force again to polishing wheel.
No matter this guarantees is the increase of rotating speed, or jet size increases, and magnetic flow liquid all can not depart from polishing wheel because of gravity or centrifugal force, and this just provides guarantee for improving removal efficiency.With original retracting device unlike power aspect: existing apparatus utilizes Action of Gravity Field, it is made naturally to depart from, and this device is by the air negative pressure of the far super magnetic flow liquid flow of vacuum generator manufacture, make the magnetic flow liquid being recovered head separation under suction function, recovery channel is entered together with air-flow, again after twice of separator, come back in reservoir, realize complete recovery.
Final effect of the present invention is compared to existing apparatus, has permissible flow large, the feature that Peak Flow Rate is high, provides complete recovery scheme for improving MRF efficiency.
Below in conjunction with accompanying drawing, the present invention is described in detail.
As Figure 1-4, large discharge magnetic flow liquid retracting device of the present invention, it comprises: the magnetic flow liquid being arranged on polishing wheel 3 bottom just departed from the neighbouring position of polishing area, the recovery that keeps flexible wires to contact with polishing wheel 34, and it goes for receiving by the magnetic flow liquid thrown away bottom polishing wheel 3; And with described recovery 4 vacuum generating device be connected, it is used to provide and reclaims the power of magnetic flow liquid.Described vacuum generating device is vavuum pump or vacuum generator.
Described recovery 4 is also connected with gravitational separation device, and it comprises: with described recovery 4 recovery tube be connected 6 and the separation member 8 that is connected with described recovery tube 6; Described separation member 8 can make the magnetic flow liquids that sucked by described recovery 4 under gravity with air separation.Described separation member 8 is also connected with base 7, is provided with the separate blade 22 that can be driven by power transmission shaft 20 by servomotor 14 in this base 7; The separate blade 22 rotated can make magnetic flow liquid and portion of residual air carry out secondary separation.Described base 7 is connected with discharge pipe 24, and this discharge pipe 24 is connected with the circulating slot of magnetic flow liquid.
The operation principle of large discharge magnetic flow liquid retracting device of the present invention is:
Magnetic flow liquid forms magnetic flow liquid ribbon projection 1, along with polishing wheel 3 moves, carries out polishing to workpiece 5 after spraying from shower nozzle 2 below polishing wheel 3, arrives and reclaims joint 4.Meanwhile pressure-air enters from the air admission hole of vacuum generator 26, and discharge from the steam vent of vacuum generator 26, thus cause negative pressure of vacuum, and negative pressure of vacuum is by sealing and circulating pipeline, through magnetic flow liquid reclaims joint 5, under the effect of negative pressure, magnetic flow liquid mixing air is sucked into gas-liquid recovery pipe 6 simultaneously, and enter separation member 8 by gas-liquid recovery pipe 6, because magnetic flow liquid is different from atmospheric density, carry out first separation under gravity, magnetic flow liquid enters base 7, air is under negative pressure of vacuum effect, through fixed head 9, guard box 10 and middle plate 11 enter blast pipe 23, and filter through oil water separator 25, discharge from the exhaust outlet of vacuum generator 26, complete gas circulation, the atwirl servomotor 14 be connected with location-plate 13 with connecting plate 12 on the other hand, by power transmission shaft 20, make separate blade 22 with same rotating speed quick rotation in base 7, magnetic flow liquid and portion of residual air are under blade effect, carry out secondary separation: centrifugation.As shown in Figure 4, because density is different, magnetic flow liquid is in outside, inner side air is under suction function, therefrom plate 11 enters air duct, the magnetic flow liquid entering twice separation arrives the liquid discharge orifice of base 7, discharges and reenters supply circulating slot, complete the recovery of magnetic flow liquid from magnetic flow liquid discharge pipe 24.
The frame for movement of the outside of the power transmission shaft 20 above described base 7 is respectively equipped with: inner shield ring 15, outer back-up ring 16, bearing 17, outer shaft 18, internal axle sleeve 19, and securing member 21; Connected mode as shown in Figure 3.
In other detailed description of the invention, also can substitute vacuum generator with use vavuum pump, its principle is identical, repeats no more here.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (5)
1. a large discharge magnetic flow liquid retracting device, is characterized in that, comprising:
Be arranged on the neighbouring position that magnetic flow liquid has just departed from polishing area, the recovery head (4) keeping flexible wires to contact with polishing wheel (3), it goes for receiving the magnetic flow liquid thrown away by polishing wheel (3) bottom;
The vacuum generating device be connected with described recovery head (4), it is used to provide the power reclaiming magnetic flow liquid.
2. large discharge magnetic flow liquid retracting device according to claim 1, it is characterized in that, described recovery head (4) is also connected with gravitational separation device, and it comprises: the recovery tube (6) be connected with described recovery head (4) and the separation member (8) be connected with described recovery tube (6);
Described separation member (8) can make the magnetic flow liquid that sucked by described recovery head (4) under gravity with air separation.
3. large discharge magnetic flow liquid retracting device according to claim 2, it is characterized in that, described separation member (8) is also connected with base (7), is provided with the separate blade (22) that can be driven by power transmission shaft (20) by servomotor (14) in this base (7); The separate blade (22) rotated can make magnetic flow liquid and portion of residual air carry out secondary separation.
4. large discharge magnetic flow liquid retracting device according to claim 3, is characterized in that, described base (7) is connected with discharge pipe (24), and this discharge pipe (24) is connected with the circulating slot of magnetic flow liquid.
5. large discharge magnetic flow liquid retracting device according to claim 1, is characterized in that, described vacuum generating device is vavuum pump or vacuum generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410508382.9A CN104290038A (en) | 2014-09-26 | 2014-09-26 | High-flow magnetorheogical fluid recycling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410508382.9A CN104290038A (en) | 2014-09-26 | 2014-09-26 | High-flow magnetorheogical fluid recycling device |
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| CN104290038A true CN104290038A (en) | 2015-01-21 |
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| CN201410508382.9A Pending CN104290038A (en) | 2014-09-26 | 2014-09-26 | High-flow magnetorheogical fluid recycling device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106116008A (en) * | 2016-07-29 | 2016-11-16 | 马鞍山福来伊环保科技有限公司 | A kind of waste and old magnetic flow liquid recovery and treatment method |
| CN106272086A (en) * | 2016-09-20 | 2017-01-04 | 中国工程物理研究院机械制造工艺研究所 | A kind of Magnetorheologicai polishing liquid withdrawer |
| CN107322347A (en) * | 2017-09-05 | 2017-11-07 | 河北工业大学 | A kind of novel and multifunctional flexible fixture and its application method |
| CN108543747A (en) * | 2018-04-16 | 2018-09-18 | 上海理工大学 | A kind of magnetorheological clamping workpieces processing cleaning device |
| CN114734305A (en) * | 2022-04-25 | 2022-07-12 | 厦门大学 | Magnetorheological polishing solution recoverer with air-magnetic sealing combination |
| CN117161841A (en) * | 2023-11-03 | 2023-12-05 | 中国科学院长春光学精密机械与物理研究所 | Non-contact dynamic magnetorheological fluid recovery device and recovery method thereof |
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| US5616066A (en) * | 1995-10-16 | 1997-04-01 | The University Of Rochester | Magnetorheological finishing of edges of optical elements |
| CN101249626A (en) * | 2008-03-25 | 2008-08-27 | 中国人民解放军国防科学技术大学 | Magnetic current changing polishing device for large caliber aspheric surface optical part |
| CN102225517A (en) * | 2011-04-25 | 2011-10-26 | 中国科学院光电技术研究所 | Combined type rotary symmetric function-removing magnetorheological polishing tool |
| CN102501146A (en) * | 2011-12-30 | 2012-06-20 | 清华大学 | Device for realizing rotary fluid supply and recycle during revolving/rotating type magnetorheological polishing |
| CN103465171A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院上海光学精密机械研究所 | Magnetorheological fluid recovery pipe |
| CN103921176A (en) * | 2014-03-27 | 2014-07-16 | 中国科学院长春光学精密机械与物理研究所 | Magnetorheological finishing device applicable to ultra-large-diameter optical processing |
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5616066A (en) * | 1995-10-16 | 1997-04-01 | The University Of Rochester | Magnetorheological finishing of edges of optical elements |
| CN101249626A (en) * | 2008-03-25 | 2008-08-27 | 中国人民解放军国防科学技术大学 | Magnetic current changing polishing device for large caliber aspheric surface optical part |
| CN102225517A (en) * | 2011-04-25 | 2011-10-26 | 中国科学院光电技术研究所 | Combined type rotary symmetric function-removing magnetorheological polishing tool |
| CN102501146A (en) * | 2011-12-30 | 2012-06-20 | 清华大学 | Device for realizing rotary fluid supply and recycle during revolving/rotating type magnetorheological polishing |
| CN103465171A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院上海光学精密机械研究所 | Magnetorheological fluid recovery pipe |
| CN103921176A (en) * | 2014-03-27 | 2014-07-16 | 中国科学院长春光学精密机械与物理研究所 | Magnetorheological finishing device applicable to ultra-large-diameter optical processing |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106116008A (en) * | 2016-07-29 | 2016-11-16 | 马鞍山福来伊环保科技有限公司 | A kind of waste and old magnetic flow liquid recovery and treatment method |
| CN106272086A (en) * | 2016-09-20 | 2017-01-04 | 中国工程物理研究院机械制造工艺研究所 | A kind of Magnetorheologicai polishing liquid withdrawer |
| CN107322347A (en) * | 2017-09-05 | 2017-11-07 | 河北工业大学 | A kind of novel and multifunctional flexible fixture and its application method |
| CN108543747A (en) * | 2018-04-16 | 2018-09-18 | 上海理工大学 | A kind of magnetorheological clamping workpieces processing cleaning device |
| CN114734305A (en) * | 2022-04-25 | 2022-07-12 | 厦门大学 | Magnetorheological polishing solution recoverer with air-magnetic sealing combination |
| CN117161841A (en) * | 2023-11-03 | 2023-12-05 | 中国科学院长春光学精密机械与物理研究所 | Non-contact dynamic magnetorheological fluid recovery device and recovery method thereof |
| CN117161841B (en) * | 2023-11-03 | 2024-01-02 | 中国科学院长春光学精密机械与物理研究所 | Non-contact dynamic magnetorheological fluid recovery device and recovery method thereof |
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Application publication date: 20150121 |