CN204183340U - A kind of rotation MRF grinding wheel device - Google Patents
A kind of rotation MRF grinding wheel device Download PDFInfo
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- CN204183340U CN204183340U CN201420627214.7U CN201420627214U CN204183340U CN 204183340 U CN204183340 U CN 204183340U CN 201420627214 U CN201420627214 U CN 201420627214U CN 204183340 U CN204183340 U CN 204183340U
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Abstract
The utility model relates to a kind of rotation MRF grinding wheel device, mainly comprise emery wheel, magnetic core, coil, magnetic brush, driving mechanism, described emery wheel comprises at least one field structure, and field structure described in each comprises a circle internal magnetic pole, a circle outer magnetic pole, is provided with the non-magnet material filler separating internal magnetic pole and outer magnetic pole between internal magnetic pole and outer magnetic pole.Described internal magnetic pole is circumferentially divided into multiple spaced internal magnetic pole block, described outer magnetic pole correspondence is circumferentially divided into multiple spaced outer magnetic pole block, described internal magnetic pole block is relative one by one with outer magnetic pole block, from overlooking direction, between relative internal magnetic pole block and outer magnetic pole block, the distance of the top is the shortest, when field structure energising produces magnetic field, magnetic flow liquid is magnetized and forms interrupted Bingham body.The utility model utilizes magnetic flow liquid to the characteristic of high-intensity magnetic field moiety aggregation, greatly increases working (machining) efficiency, adopts multiple field structure array arrangement, can realize large area polishing.
Description
Technical field
The utility model relates to optical element surface Ultra-smooth machining technical field, is specifically related to a kind of rotation MRF grinding wheel device.
Background technology
Technique of Magnetorheological Finishing is that the rheological characteristic utilizing magnetic flow liquid in magnetic field carries out polishing, namely under the effect of high-intensity magnetic field, there is stream in gradient magnetic to become and the flexible grinding wheel with viscoplasticity of formation, show as the character of similar solid, when removing magnetic field, recover again the phenomenon of its flow behavior.The polishing that this technology realizes piece surface requires there is relative motion between part and emery wheel, can form shearing force, reach removal object, realize the high quality polished of piece surface after interpolation polishing fluid.In MRF process, the size of shearing force determines the speed of polishing efficiency, and shearing force size and magnetic field intensity, the many factors such as speed of related movement determine.
In disclosed Technique of Magnetorheological Finishing, there is the magnetorheological wheel structure of various shape and produce the mode of relative motion, as:
It is the magnetic rheological polishing method of Luo Qiesiji university of U.S. invention disclosed in Chinese patent ZL96198445.7, adopt a point contact type machining tool, in process, machining tool keeps maintaining static, it drives magnetic flow liquid to enter polishing area by belt wheel, and workpiece rotates and produces large shearing force and form polishing.Chinese patent ZL03153996.3 also discloses a kind of magnetic rheologic polishing head in electromagnetic mode, and bistrique forms the flexible grinding wheel that a wire has viscoplasticity in process, produces by the rotation of emery wheel the polishing that relative motion realizes workpiece.Chinese patent ZL200910052609.2 discloses high efficiency controllable multiple wheel head magnetic rheology buffing device, adopts the circumference field structure of monocycle or many rings, adopts array arrangement to realize the processing of different purposes workpiece simultaneously.Chinese patent ZL200820228337.8 discloses a kind of ring-belt rotary type magnetorheological finishing head, and this technology, at employing endless belt field structure, by the rotation of endless belt field structure in process, and then reaches the object of surface of the work polishing.
Above-mentioned MRF grinding head device can both realize the surface finish of workpiece, there is certain novelty, but have ignored a key issue in these techniques, the key realizing MRF needs to form shearing force, shearing force is larger, the efficiency of its polishing is higher, existing technology relies on increasing magnetic field and improves speed of related movement and realizes, speed of related movement increase can allow shearing force increase, but only have the shearing force of part to play polishing action, what adopt due to these technology is continuous field structure, when shearing force is greater than the frictional force between magnetic flow liquid and emery wheel, magnetic flow liquid can slide along Distribution of Magnetic Field direction, therefore in existing MRF process, the size of shearing force is actual is the restriction of the frictional force be subject between magnetic flow liquid and magnetic pole.And shearing force will be increased, just necessary increasing friction force, conventional method is increasing magnetic field, namely the attraction between magnetic flow liquid and magnetic pole is increased, general frictional force is approximately equal to attraction and is multiplied by coefficient of friction, coefficient of friction must be less than or equal to 1, and general practical application is less than 0.5, therefore by the method for increasing magnetic field be difficult to increase effective shearing force.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is that providing a kind of improves effective shearing force, improves working (machining) efficiency, realizes the rotation MRF grinding wheel device of large area polishing.
For achieving the above object, the utility model can be achieved by the following technical programs:
A kind of rotation MRF grinding wheel device, comprise emery wheel, magnetic core, coil, magnetic brush, driving mechanism, described emery wheel comprises at least one field structure, field structure described in each comprises a circle internal magnetic pole, a circle outer magnetic pole, is provided with the non-magnet material filler separating internal magnetic pole and outer magnetic pole between internal magnetic pole and outer magnetic pole, the internal magnetic pole of field structure described in each is contrary with the polarity of outer magnetic pole, described emery wheel is fixed on magnetic core, described coil winding is on magnetic core, described magnetic brush is to coil power supply, and described driving mechanism drives emery wheel, magnetic core and coil to rotate.Described internal magnetic pole is circumferentially divided into multiple spaced internal magnetic pole block, described outer magnetic pole correspondence is circumferentially divided into multiple spaced outer magnetic pole block, described internal magnetic pole block is relative one by one with outer magnetic pole block, from overlooking direction, between relative internal magnetic pole block and outer magnetic pole block, the distance of the top is the shortest, when field structure energising produces magnetic field, magnetic flow liquid is magnetized and forms interrupted Bingham body.
Further, the bottom of described multiple internal magnetic pole block connects together, and the bottom end of described multiple outer magnetic pole block connects together, and internal magnetic pole and outer magnetic pole are as a whole separately, is convenient to magnetic pole energising and produces magnetic field.
Further, described emery wheel comprises multiple field structure, multiple field structure sets gradually from the inside to the outside, the internal magnetic pole block of each field structure is identical with the quantity of outer magnetic pole block, pole piece position between two adjacent field structures is corresponding, the pole piece that two adjacent field structures are relative links together, and the pole piece polarity that two adjacent field structures are connected is identical.Adopt this structure can form multiple interrupted Bingham body, be applicable to the processing of heavy-calibre planar optical element.
Further, described driving mechanism comprises motor, bearing, belt pulley I, belt pulley II, belt and support, described magnetic core is fixed on the inner ring of bearing, the inner ring of described bearing is fixedly connected with belt pulley I, the outer ring of described bearing and motor are fixed on support, the rotating shaft of described motor is provided with belt pulley II, and described belt pulley I and belt pulley II are coupled together by belt.
Further, described internal magnetic pole is concordant with the pole piece top end face of outer magnetic pole, and the lines flow smoothly to make produced Bingham body.Described internal magnetic pole is concordant with the pole piece bottom end face of outer magnetic pole, is conducive to magnetic pole and is arranged on magnetic core.
Further, described magnetic core is W shape.
Further, described emery wheel comprises three field structures.
The utility model adopts the field structure of interrupted shape, the Bingham body of interrupted shape can be formed, utilize magnetic flow liquid to the characteristic of high-intensity magnetic field moiety aggregation, when emery wheel rotates, the size of effective shearing force just equals pole pair magnetic flow liquid attraction and adds frictional force, and the shearing force in MRF process can increase at double, greatly increases working (machining) efficiency, adopt multiple field structure array arrangement, large area polishing can be realized.
The grinding wheel device of single field structure of the present utility model is applicable to the processing of sphere and plane optical element.
The grinding wheel device of multiple field structure of the present utility model is applicable to the processing of heavy-calibre planar optical element.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation comprising the emery wheel of a field structure of the present utility model;
Fig. 3 is the structural representation comprising the emery wheel of three field structures of the present utility model;
Fig. 4 be the utility model form the force analysis schematic diagram of Bingham body;
In figure: 1-emery wheel, 11-field structure, 111-internal magnetic pole, 112-outer magnetic pole, 113-non-magnet material filler, 114-internal magnetic pole block, 115-outer magnetic pole block, 12-first field structure, 13-second field structure, 14-the 3rd field structure, 2-Bingham body, 3-magnetic core, 4-coil, 5-magnetic brush, 6-driving mechanism, 61-motor, 62-bearing, 63-belt pulley I, 64-belt pulley II, 65-belt, 66-support, 7-workpiece.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is further described:
As shown in Figure 1, rotation MRF grinding wheel device described in the utility model, mainly comprises emery wheel 1, magnetic core 3, coil 4, magnetic brush 5, driving mechanism 6, and preferably, magnetic core 3 is W shape magnetic core.Emery wheel 1 is fixed on magnetic core 3, guarantees that magnetic pole and magnetic core 3 can touch, and coil 4 winding is on magnetic core 3, and magnetic brush 5 makes magnetic pole produce magnetic field to coil 4 power supply.Driving mechanism 6 comprises motor 61, bearing 62, belt pulley I 63, belt pulley II 64, belt 65 and support 66.Magnetic core 3 is fixed on the inner ring of bearing 62, the inner ring of bearing 62 is fixedly connected with belt pulley I 63, the outer ring of bearing 62 and motor 61 are separately fixed at the two ends of support 66, and the rotating shaft of motor 61 is provided with belt pulley II 64, and belt pulley I 63 is connected drive with belt pulley II 64 by belt 65.Motor 61 starts, and electric machine rotational axis rotates, and drives belt pulley II 64, belt pulley II 64 drives belt pulley I 63 to rotate by belt 65 again, belt pulley I 63 is with dynamic bearing 62 inner ring to rotate, and then drives magnetic core 3 to rotate, thus driving emery wheel 1 is clockwise or be rotated counterclockwise.
As shown in Figure 2, emery wheel 1 comprises a field structure 11, field structure 11 comprises a circle internal magnetic pole 111, and encloses outer magnetic pole 112, is provided with non-magnet material filler 113 between internal magnetic pole 111 and outer magnetic pole 112, non-magnet material filler 113 separates internal magnetic pole 111 and outer magnetic pole 112, and internal magnetic pole 111 is contrary with the polarity of outer magnetic pole 112.Internal magnetic pole 111 sticks with glue or the connected mode of screw and non-magnet material filler 113 are connected, ensure to seal between the two simultaneously, outer magnetic pole 112 also sticks with glue or the connected mode of screw and non-magnet material filler 113 are connected, ensure to seal between the two, design can ensure that three moves simultaneously so simultaneously.Internal magnetic pole 111 is circumferentially divided into multiple spaced internal magnetic pole block 114 equably, outer magnetic pole 112 correspondence be also circumferentially divided into multiple spaced outer magnetic pole block 115 equably, internal magnetic pole block 114 is relative one by one with outer magnetic pole block 115.The bottom of all internal magnetic pole blocks 114 connects together, and makes internal magnetic pole 111 one-tenth as a whole; The bottom of all outer magnetic pole blocks 115 also connects together, and makes outer magnetic pole 112 one-tenth as a whole.Internal magnetic pole 111 and the pole piece top of outer magnetic pole 112 and the end face of bottom all concordant, the width of pole piece is as far as possible little, from overlooking direction, the distance of the top between relative internal magnetic pole block 114 and outer magnetic pole block 115 is the shortest, to ensure the magnetorheological processing effect of certainty, there is not the phenomenon that magnetic flow liquid skids.When field structure 11 is energized generation magnetic field, magnetic flow liquid is magnetized and forms interrupted Bingham body 2.
As shown in Figure 3, for the replacing structure of emery wheel, this emery wheel 1 comprises three field structures, these three field structures are respectively the first field structure 12, second field structure 13 and the 3rd field structure 14, set gradually from the inside to the outside in the form of concentric circles, the internal magnetic pole block 114 of each field structure is identical with the quantity of outer magnetic pole block 115, pole piece position between two adjacent field structures is corresponding, the pole piece that two adjacent field structures are relative links together, and the pole piece polarity that two adjacent field structures are connected is identical.The structural design of each field structure is the same with the design of the single field structure of Fig. 2.Wherein, the outer magnetic pole block 115 of the first field structure 12 is relative one by one with the internal magnetic pole block 114 of the second field structure 13, and links together, and polarity is identical.The outer magnetic pole block 115 of the second field structure 13 is relative one by one with the internal magnetic pole block 114 of the 3rd field structure 14, and links together, and polarity is identical.This emery wheel, at interpolation magnetic flow liquid, applies behind magnetic field, can form three interrupted Bingham body 2.
According to above-mentioned design philosophy, the emery wheel 1, N that can design N number of field structure 11 composition is more than or equal to 1.In applying magnetic field, after adding magnetic flow liquid, multiple interrupted Bingham body 2 can be formed.
As shown in Figure 4, the field structure of emery wheel 1 produces magnetic field, magnetorheological change liquid is magnetized and forms the Bingham body 2 of the interrupted shape of endless belt, workpiece 7 is rotated counterclockwise, and emery wheel 1 turns clockwise, and the Bingham body 2 of the interrupted shape of endless belt is adsorbed by emery wheel 1, this absorption affinity is downward along reference axis z direction, simultaneously the Bingham body 2 of the interrupted shape of endless belt is subject to the frictional force with emery wheel 1, this power for being parallel to xoz plane, along the endless belt direction of emery wheel 1.Simultaneously the visco-plasticity magnetic flow liquid of the interrupted shape of endless belt is be applied with shearing force to workpiece 7, and the Bingham body 2 that so workpiece 7 gives the interrupted shape of endless belt has a direction active force, and this power is parallel to xoz plane, and direction is contrary with frictional force.When frictional force is less than shearing force, due to the characteristic that the oriented high-intensity magnetic field of magnetic flow liquid is assembled, there is magnetic field the band portions position of emery wheel 1, portion does not have magnetic field, for interrupted shape structure, therefore magnetic flow liquid is sheared and tries hard to recommend from there being magnetic field position, and the characteristic that the oriented high-intensity magnetic field of magnetic flow liquid can be made to assemble is had an effect, and is formed and is more than or equal to shearing force.Simultaneously identical with shearing force direction absorption affinity, still can ensure the Bingham body 2 of the interrupted shape of endless belt and the invariant position adsorbing magnetic pole point, and then significantly can increase shearing force, improve polishing efficiency.
For a person skilled in the art, according to above technical scheme and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection domain of the utility model claim.
Claims (7)
1. one kind rotates MRF grinding wheel device, comprise emery wheel, magnetic core, coil, magnetic brush, driving mechanism, described emery wheel comprises at least one field structure, field structure described in each comprises a circle internal magnetic pole, one circle outer magnetic pole, the non-magnet material filler separating internal magnetic pole and outer magnetic pole is provided with between internal magnetic pole and outer magnetic pole, the internal magnetic pole of field structure described in each is contrary with the polarity of outer magnetic pole, described emery wheel is fixed on magnetic core, described coil winding is on magnetic core, described magnetic brush is to coil power supply, described driving mechanism drives emery wheel, magnetic core and coil rotate, it is characterized in that: described internal magnetic pole is circumferentially divided into multiple spaced internal magnetic pole block, described outer magnetic pole correspondence is circumferentially divided into multiple spaced outer magnetic pole block, described internal magnetic pole block is relative one by one with outer magnetic pole block, from overlooking direction, between relative internal magnetic pole block and outer magnetic pole block, the distance of the top is the shortest, when field structure energising produces magnetic field, magnetic flow liquid is magnetized and forms interrupted Bingham body.
2. rotation MRF grinding wheel device according to claim 1, is characterized in that: the bottom of described multiple internal magnetic pole block connects together, and the bottom of described multiple outer magnetic patch connects together.
3. rotation MRF grinding wheel device according to claim 1 and 2, it is characterized in that: described emery wheel comprises multiple field structure, multiple field structure sets gradually from the inside to the outside, the internal magnetic pole block of each field structure is identical with the quantity of outer magnetic pole block, pole piece position between two adjacent field structures is corresponding, the pole piece that two adjacent field structures are relative links together, and the pole piece polarity that two adjacent field structures are connected is identical.
4. rotation MRF grinding wheel device according to claim 1, it is characterized in that: described driving mechanism comprises motor, bearing, belt pulley I, belt pulley II, belt and support, described magnetic core is fixed on the inner ring of bearing, the inner ring of described bearing is fixedly connected with belt pulley I, the outer ring of described bearing and motor are fixed on support, the rotating shaft of described motor is provided with belt pulley II, and described belt pulley I and belt pulley II are coupled together by belt.
5. rotation MRF grinding wheel device according to claim 1, is characterized in that: described internal magnetic pole is concordant with the pole piece top end face of outer magnetic pole, and described internal magnetic pole is concordant with the pole piece bottom end face of outer magnetic pole.
6. rotation MRF grinding wheel device according to claim 1, is characterized in that: described magnetic core is W shape.
7. rotation MRF grinding wheel device according to claim 3, is characterized in that: described emery wheel comprises three field structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627214.7U CN204183340U (en) | 2014-10-27 | 2014-10-27 | A kind of rotation MRF grinding wheel device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627214.7U CN204183340U (en) | 2014-10-27 | 2014-10-27 | A kind of rotation MRF grinding wheel device |
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| Publication Number | Publication Date |
|---|---|
| CN204183340U true CN204183340U (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420627214.7U Withdrawn - After Issue CN204183340U (en) | 2014-10-27 | 2014-10-27 | A kind of rotation MRF grinding wheel device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308672A (en) * | 2014-10-27 | 2015-01-28 | 白素华 | Rotary magnetorheological finishing wheel device |
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2014
- 2014-10-27 CN CN201420627214.7U patent/CN204183340U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308672A (en) * | 2014-10-27 | 2015-01-28 | 白素华 | Rotary magnetorheological finishing wheel device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160914 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |