CN114515979B - Magnetorheological polishing device for high-precision polishing - Google Patents
Magnetorheological polishing device for high-precision polishing Download PDFInfo
- Publication number
- CN114515979B CN114515979B CN202210186067.3A CN202210186067A CN114515979B CN 114515979 B CN114515979 B CN 114515979B CN 202210186067 A CN202210186067 A CN 202210186067A CN 114515979 B CN114515979 B CN 114515979B
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- Prior art keywords
- polishing
- magnetorheological
- driving motor
- wheel
- polishing liquid
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- 238000005498 polishing Methods 0.000 title claims abstract description 183
- 239000007788 liquid Substances 0.000 claims abstract description 86
- 238000003756 stirring Methods 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000007517 polishing process Methods 0.000 claims abstract description 5
- 230000005389 magnetism Effects 0.000 claims abstract description 4
- 239000003082 abrasive agent Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003746 surface roughness Effects 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
-
- 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
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention provides a magnetorheological polishing device for high-precision polishing, which comprises: a polishing liquid pool; the polishing wheel system comprises a polishing wheel and a first driving motor, and the polishing wheel is used for polishing a workpiece; the first driving motor is in driving connection with the polishing wheel; the polishing wheel comprises a polishing ring, a bracket and a plurality of coils, the bracket is arranged in the polishing ring and comprises a mounting base and a plurality of clapboards, and the mounting base is fixedly connected with an output shaft of the first driving motor; the coils are circumferentially arranged on the outer circumference of the mounting base at intervals, two adjacent coils are separated by a partition plate, and two ends of the partition plate are fixedly connected with the mounting base and the polishing ring respectively; the surface of the bracket is made of a magnetism isolating material; the six-degree-of-freedom mechanical arm clamps the workpiece to the lower part of the polishing wheel when in operation; in the polishing process, the polishing wheel and the workpiece are contacted in the magnetorheological polishing liquid; and the impeller stirring device is arranged on the polishing liquid pool and used for stirring the polishing liquid in the polishing liquid pool.
Description
Technical Field
The invention belongs to the technical field of polishing, and particularly relates to a magnetorheological polishing device for high-precision polishing.
Background
The magnetorheological polishing technology has high processing precision, small surface roughness and small surface damage, and is often applied to the field of optical processing.
Magnetorheological polishing fluid is a mixed fluid of ferromagnetic particles and abrasive particles, and sedimentation occurs, which results in reduced polishing effect and reduced polishing efficiency. The existing complex surface magnetorheological polishing device generally lacks a real-time stirring mechanism, the device generally adopts independent structures of a collector, a circulating pipeline and a stirring device to recover, stir and supply the magnetorheological polishing liquid, and the design increases the complexity of a system and has higher failure rate; in addition, because the flow of the circulating pipeline is small, most of the magnetorheological polishing liquid stays in the storage device, and sedimentation is more likely to occur.
Disclosure of Invention
In order to solve the above problems, the present invention provides a magnetorheological polishing apparatus for high-precision polishing, comprising:
the magnetorheological polishing liquid is filled in the polishing liquid pool;
the polishing wheel system comprises a polishing wheel and a first driving motor, wherein the polishing wheel is used for polishing a workpiece; the first driving motor is fixed on the outer side of the pool wall of the polishing pool and is in driving connection with the polishing wheel; the polishing wheel comprises a polishing ring, a bracket and a plurality of coils, the bracket is arranged in the polishing ring, the bracket comprises a mounting base and a plurality of clapboards, and the mounting base is fixedly connected with an output shaft of the first driving motor; the coils are arranged on the outer circumference of the mounting base at intervals in a circumferential shape, two adjacent coils are separated by a partition plate, and two ends of the partition plate are fixedly connected with the mounting base and the polishing ring respectively; the surface of the bracket is made of a magnetism isolating material;
the six-degree-of-freedom mechanical arm clamps a workpiece to the lower part of the polishing wheel when in operation; in the polishing process, the polishing wheel and a workpiece are contacted in the magnetorheological polishing liquid;
and the impeller stirring device is arranged on the polishing liquid pool and used for stirring the polishing liquid in the polishing liquid pool.
Preferably, the impeller stirring device comprises a second driving motor and a stirring impeller, and the second driving motor is in driving connection with the stirring impeller; the stirring impeller extends into the polishing liquid pool.
Preferably, the magnetorheological polishing fluid is a mixed fluid of ferromagnetic particles and abrasive particles.
Preferably, the magnetorheological polishing device for high-precision polishing further comprises a feeding device, wherein the feeding device comprises a storage bin, a screw rod, a third driving motor and a coupler, the third driving motor is in driving connection with the screw rod through the coupler, the screw rod is arranged in the storage bin, a feeding hole and a discharging hole are formed in the storage bin, and the feeding hole is used for supplementing abrasive materials into the storage bin; the grinding materials fall into the polishing liquid pool from the discharge hole through the transmission of the screw rod and are uniformly distributed into the polishing liquid pool through the impeller stirring device.
Preferably, the stirring impeller of the impeller stirring device is arranged close to the discharge hole.
Preferably, a liquid level meter is arranged on the polishing liquid pool, and when the liquid level of the magnetorheological polishing liquid reaches a specified scale during liquid injection, liquid injection is stopped.
Preferably, a clamp for clamping the workpiece is arranged at the end part of the six-degree-of-freedom mechanical arm, and the clamp adopts a vacuum chuck.
Preferably, a sensor for detecting pressure is arranged on the clamp and is connected with the controller, the sensor detects pressure and generates an electric signal to be fed back to the controller, and the controller determines the feeding amount of the next step according to the feedback signal to form a closed-loop control loop.
Preferably, a splash guard is further arranged on the outer side of the polishing wheel, and when the coil is powered off, the magnetorheological polishing liquid attached to the polishing wheel is reduced in viscosity and centrifugally moves onto the splash guard and then flows back into the polishing liquid pool.
Preferably, the magnetorheological polishing device for high-precision polishing further comprises a base, and the polishing liquid pool and the six-degree-of-freedom mechanical arm are both arranged on the base.
Compared with the prior art, the invention has the following technical effects:
the first and the traditional magnetorheological polishing methods need a circulating pipeline with a stirring mechanism, have complex structures and high failure rates. The magnetorheological polishing device based on the real-time stirring system provided by the invention is simpler in structure and convenient to use.
Secondly, the polishing processing position is below the liquid level of the polishing liquid, and besides, the stirring impeller enables the polishing liquid in the magnetorheological polishing liquid pool to be continuously circulated, so that the heat dissipation performance is good, and the polishing quality is high.
Thirdly, by using the six-degree-of-freedom mechanical arm, the magnetorheological polishing device can realize closed-loop control of high-precision feeding motion, finish high-precision complex curved surface polishing, automatically pick and place workpieces, reduce manpower consumption and improve working efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the accompanying drawings:
FIG. 1 is a schematic view of a magnetorheological polishing apparatus for high precision polishing according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a feed start position of a complex curved optical part according to a preferred embodiment of the present invention;
figure 3 is a schematic view of the polishing wheel according to the preferred embodiment of the present invention;
fig. 4 is a schematic structural diagram of a feeding device according to a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Referring to fig. 1 to 4, a magnetorheological polishing apparatus for high-precision polishing, comprising:
a polishing liquid pool 12, which is arranged on the base 1, wherein magnetorheological polishing liquid 13 is injected into the polishing liquid pool 12, and the magnetorheological polishing liquid 13 is mixed liquid of ferromagnetic particles and abrasive particles (abrasive materials); the liquid level meter 10 is arranged on the polishing liquid pool 12, scales on the liquid level meter 10 are observed when liquid is injected, and liquid injection is stopped when the liquid level of the magnetorheological polishing liquid 13 reaches a specified scale; the lower part of the polishing wheel 3 is immersed in the magnetorheological polishing liquid 13 to a certain depth by the liquid level with a specified scale;
a polishing wheel 3 system comprising a polishing wheel 3 and a first driving motor 5, wherein the polishing wheel 3 is used for polishing a workpiece 6; the first driving motor 5 is fixed above the outer side of the wall of the polishing liquid pool 12, and the first driving motor 5 is in driving connection with the polishing wheel 3; referring to fig. 3, the polishing wheel 3 includes a polishing ring 31, a support 33, and a plurality of coils 32, wherein the outer peripheral surface of the polishing ring 31 is used for polishing a workpiece; the support 33 is arranged in the polishing ring 31, the support 33 comprises a mounting base 331 and a plurality of partition plates 332, a mounting clamping hole 3311 fixedly connected with the output shaft of the first driving motor 5 is formed in the middle of the mounting base 331, and the mounting base 331 is fixedly sleeved on the output shaft of the first driving motor 5 in a clamping manner through the mounting clamping hole 3311; the coils 32 are circumferentially arranged on the outer circumference of the mounting base 331 at intervals, two adjacent coils 32 are separated by a partition plate 332, and two ends of the partition plate 332 are fixedly connected with the mounting base 331 and the polishing ring 31 respectively; the surface of the bracket 33 is made of magnetism isolating material;
the six-degree-of-freedom mechanical arm 2 is arranged on the base 1, and when in operation, the six-degree-of-freedom mechanical arm 2 clamps a workpiece below the polishing wheel 3; during the polishing process, the polishing wheel 3 and the workpiece 6 are always contacted in the magnetorheological polishing liquid 13;
and the impeller stirring device is arranged on the polishing liquid pool 12 and is used for stirring the polishing liquid in the polishing liquid pool 12.
In the embodiment, the impeller stirring device comprises a second driving motor 8 and a stirring impeller 7, wherein the second driving motor 8 is in driving connection with the stirring impeller 7; the stirring impeller 7 extends into the polishing liquid bath 12.
The magnetorheological polishing device for high-precision polishing provided by the embodiment further comprises a feeding device 9, referring to fig. 4, the feeding device 9 comprises a storage bin 93, a screw 94, a third driving motor 91 and a coupler 92, the third driving motor 91 is in driving connection with the screw 94 through the coupler 92, the screw 94 is arranged in the storage bin 93, a feeding hole 931 and a discharging hole 932 are arranged on the storage bin 93, and the feeding hole 931 is used for supplementing abrasive materials into the storage bin 93; the abrasive falls into the polishing liquid tank 12 from the discharge port 932 by the drive of the screw 94, and is uniformly distributed into the polishing liquid tank 12 by the impeller stirring device. The stirring impeller 7 of the impeller stirring device is arranged close to the discharge port 932.
In this embodiment, a fixture for clamping the workpiece 6 is provided at the end of the six-degree-of-freedom mechanical arm 2, and the fixture adopts a vacuum chuck.
The clamp is provided with a sensor for detecting pressure, the sensor is connected with a controller 11, the sensor detects the pressure and generates an electric signal to be fed back to the controller 11, and the controller 11 determines the feeding amount of the next step according to the feedback signal to form a closed-loop control loop.
The outer side of the polishing wheel 3 is also provided with a splash guard 4, and the splash guard 4 is connected with the wall of the polishing liquid pool 12 by a hinge. When the coil 32 is deenergized, the magnetorheological polishing liquid 13 attached to the polishing wheel 3 is reduced in viscosity and centrifugally moved onto the splash plate 4 and then flows back into the polishing liquid bath 12.
Working principle:
first, the six-degree-of-freedom mechanical arm 2 moves the jig to a workpiece storage place to be processed, clamps the workpiece 6 by using a vacuum chuck, and transfers the workpiece to a region below the polishing wheel 3 below the liquid surface of the magnetorheological polishing liquid 13 according to a predetermined track. In the polishing process, the polishing wheel 3 and the workpiece 6 are always contacted below the liquid level of the magnetorheological polishing liquid 13, so that the magnetorheological polishing liquid 13 is always arranged between the polishing wheel 3 and the workpiece 6.
After the processing is started, the coil 32 corresponding to the polishing wheel 3 immersed under the liquid surface of the magnetorheological polishing liquid 13 is electrified to generate a magnetic field, the viscosity of the magnetorheological polishing liquid 13 in the magnetic field action area is increased, the magnetorheological polishing liquid stays on the polishing ring 31 to form a polishing ribbon, and the polishing ribbon performs cutting main movement on the workpiece 6 along with the polishing wheel 3. After the part of polishing wheel 3 completes cutting and separation from the workpiece 6, the corresponding coil 32 of the part of polishing wheel 3 is powered off, the magnetic field disappears, the viscosity of the magnetorheological polishing liquid 13 attached to the part of polishing wheel 3 is reduced, the fluidity is enhanced, and the magnetorheological polishing liquid is centrifugally moved to the upper part of the splash guard 4 to flow back to the polishing liquid pool 12.
The six-degree-of-freedom mechanical arm 2 clamps the workpiece 6 to perform feeding motion, so that polishing of the workpiece 6 with complex surfaces such as complex curved surfaces is realized. After the machining is completed, the mechanical arm automatically places the workpiece 6 in the machined workpiece 6 storage place.
After polishing is performed for a period of time, abrasive particles in the magnetorheological polishing liquid 13 are worn, the polishing effect is weakened, and the abrasive needs to be supplemented. In operation, the third driving motor 91 drives the screw 94 to rotate, and the abrasive falls into the polishing liquid pool 12 from the discharge port 932 at the end of the storage bin 93, and is uniformly distributed into the liquid in the polishing liquid pool 12 due to the action of the stirring impeller 7. A feed opening 931 in the storage bin 93 is used to replenish the abrasive material into the replenishment device 9.
The control system of the device is a closed-loop control system, a sensor attached to a clamp at the end part of a mechanical arm during processing detects pressure and generates an electric signal to be fed back to the controller 11, and the controller 11 determines the feeding amount of the next step according to the feedback signal to form a closed-loop control loop.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (6)
1. A magnetorheological polishing apparatus for high precision polishing, comprising:
the magnetorheological polishing liquid is filled in the polishing liquid pool;
the polishing wheel system comprises a polishing wheel and a first driving motor, wherein the polishing wheel is used for polishing a workpiece; the first driving motor is fixed on the outer side of the pool wall of the polishing pool and is in driving connection with the polishing wheel; the polishing wheel comprises a polishing ring, a bracket and a plurality of coils, the bracket is arranged in the polishing ring, the bracket comprises a mounting base and a plurality of clapboards, and the mounting base is fixedly connected with an output shaft of the first driving motor; the coils are arranged on the outer circumference of the mounting base at intervals in a circumferential shape, two adjacent coils are separated by a partition plate, and two ends of the partition plate are fixedly connected with the mounting base and the polishing ring respectively; the surface of the bracket is made of a magnetism isolating material;
the six-degree-of-freedom mechanical arm clamps a workpiece to the lower part of the polishing wheel when in operation; in the polishing process, the polishing wheel and a workpiece are contacted in the magnetorheological polishing liquid;
the impeller stirring device is arranged on the polishing liquid pool and used for stirring polishing liquid in the polishing liquid pool and comprises a second driving motor and a stirring impeller, and the second driving motor is in driving connection with the stirring impeller; the stirring impeller extends into the polishing liquid pool;
the feeding device comprises a storage bin, a screw rod, a third driving motor and a coupler, wherein the third driving motor is in driving connection with the screw rod through the coupler, the screw rod is arranged in the storage bin, a feed inlet and a discharge outlet are formed in the storage bin, and the feed inlet is used for supplementing abrasive materials into the storage bin; the grinding materials fall into the polishing liquid pool from the discharge port through the transmission of the screw rod and are uniformly distributed into the polishing liquid pool through the impeller stirring device;
and a stirring impeller of the impeller stirring device is arranged close to the discharge hole.
2. The magnetorheological polishing device for high-precision polishing according to claim 1, wherein the liquid level meter is arranged on the polishing liquid tank, and when the liquid level of the magnetorheological polishing liquid reaches a specified scale, the liquid injection is stopped.
3. The magnetorheological polishing device for high-precision polishing according to claim 1, wherein a clamp for clamping a workpiece is arranged at the end part of the six-degree-of-freedom mechanical arm, and the clamp adopts a vacuum chuck.
4. A magnetorheological polishing device for high-precision polishing as in claim 3, wherein the fixture is provided with a sensor for detecting pressure, the sensor is connected with a controller, the sensor detects pressure and generates an electrical signal to be fed back to the controller, and the controller determines the feeding amount of the next step according to the feedback signal to form a closed-loop control circuit.
5. The magnetorheological polishing apparatus for high-precision polishing as recited in claim 1, wherein a splash guard is further provided on the outer side of the polishing wheel, and when the coil is de-energized, the magnetorheological polishing fluid attached to the polishing wheel is reduced in viscosity and centrifugally moved onto the splash guard and then flows back into the polishing liquid bath.
6. The magnetorheological polishing device for high-precision polishing as recited in claim 1, further comprising a base, wherein the polishing liquid bath and the six-degree-of-freedom mechanical arm are disposed on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210186067.3A CN114515979B (en) | 2022-02-28 | 2022-02-28 | Magnetorheological polishing device for high-precision polishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210186067.3A CN114515979B (en) | 2022-02-28 | 2022-02-28 | Magnetorheological polishing device for high-precision polishing |
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| Publication Number | Publication Date |
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| CN114515979A CN114515979A (en) | 2022-05-20 |
| CN114515979B true CN114515979B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210186067.3A Active CN114515979B (en) | 2022-02-28 | 2022-02-28 | Magnetorheological polishing device for high-precision polishing |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115741355B (en) * | 2022-11-25 | 2024-01-30 | 无锡舜邦机械有限公司 | Generator rotating shaft machining device with edging and polishing functions |
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| CN114515979A (en) | 2022-05-20 |
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