CN109759909B - Moving magnetic pole magnetorheological polishing device and method - Google Patents
Moving magnetic pole magnetorheological polishing device and method Download PDFInfo
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- CN109759909B CN109759909B CN201910184244.2A CN201910184244A CN109759909B CN 109759909 B CN109759909 B CN 109759909B CN 201910184244 A CN201910184244 A CN 201910184244A CN 109759909 B CN109759909 B CN 109759909B
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- 238000005498 polishing Methods 0.000 title claims abstract description 146
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 112
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- 230000005540 biological transmission Effects 0.000 claims description 28
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- 239000003638 chemical reducing agent Substances 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 10
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- 238000010168 coupling process Methods 0.000 description 10
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- 230000009471 action Effects 0.000 description 7
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- 238000005265 energy consumption Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
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- 238000007517 polishing process Methods 0.000 description 1
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Abstract
The invention relates to the technical field of magnetorheological polishing, in particular to a moving magnetic pole magnetorheological polishing device and a method. The clamping mechanism is used for clamping a workpiece to be polished, the workpiece is cylindrical, and magnetorheological fluid can be filled on the inner wall of the workpiece; the polishing mechanism comprises a polishing wheel and a permanent magnet arranged in the polishing wheel, and the polishing wheel can adsorb magnetorheological fluid on a workpiece and polish the workpiece; the lifting mechanism is arranged on the movable workbench, and the polishing wheel is rotatably arranged on the lifting mechanism. According to the invention, the movable workbench drives the polishing wheel to move along the horizontal direction and perform displacement compensation, the lifting mechanism enables the polishing wheel to move in the vertical direction, the position of the polishing wheel on the inner wall of the workpiece is comprehensively controlled, the surface of the inner wall of the workpiece is polished more uniformly, and the operation flow is simplified on the premise of ensuring the processing precision.
Description
Technical Field
The invention relates to the technical field of magnetorheological polishing, in particular to a movable magnetic pole magnetorheological polishing device.
Background
The magnetic rheological liquid is a novel intelligent material, is a suspension formed by mixing high-magnetic permeability and low-magnetic-hysteresis tiny soft magnetic particles and non-magnetic liquid, and shows the low-viscosity Newtonian fluid characteristic under the condition of zero magnetic field, and shows the high-viscosity and low-fluidity Bingham (Bingham) body characteristic under the action of strong magnetic field. The magnetorheological fluid has high shear yield under a strong magnetic field, and can generate larger shear yield strength even under a weaker magnetic field. The magnetorheological fluid has wide application range, can maintain the characteristics in a large temperature range and can be kept not to be layered for a long time. The magnetorheological fluid polishing device polishes by the viscous shearing force of the magnetorheological fluid under the magnetic field, has the characteristics of easy control, quick response, good polishing effect and the like, and is more and more concerned and valued by people.
Through literature research, the existing magnetorheological fluid rotary inner surface polishing system is found that magnetorheological fluid is injected into a polishing pool, a polishing workpiece is fixed in the polishing pool, a mandrel is arranged at the axis of the polishing workpiece, a magnetic field generating device is arranged on the periphery of the polishing pool, a numerical control main shaft is started to drive the mandrel to rotate, the magnetorheological fluid is driven to flow, relative motion with the workpiece is formed, and therefore a rotary surface is polished until corresponding precision is achieved. The device has the advantages that the grinding amount of each generatrix point on the inner surface of the revolving body is consistent, and the uniformity is good. However, the polishing device has large axial size and large energy consumption, the rotation speed of the mandrel is limited to a certain extent due to the existence of the polishing pool, and the grinding amount is not easy and convenient to control by adjusting the magnetic field to control the magnetic field force of each point of a bus on the inner surface of the revolving body, so that the polishing device has the advantages of compact structure, simplicity and convenience in operation and energy consumption reduction on the premise of ensuring the processing precision.
Disclosure of Invention
Technical problem to be solved
The invention mainly aims to provide a moving magnetic pole magneto-rheological polishing device, and aims to solve the problem that the existing magneto-rheological polishing device is inconvenient to operate.
(II) technical scheme
In order to achieve the above object, the moving-pole magnetorheological finishing device of the present invention comprises:
the clamping mechanism is used for clamping a workpiece to be polished, the workpiece is cylindrical, and magnetorheological fluid can be filled on the inner wall of the workpiece;
a movable table capable of horizontal movement;
the polishing mechanism comprises a polishing wheel and a permanent magnet arranged in the polishing wheel, and the polishing wheel can adsorb the magnetorheological fluid on the workpiece and polish the workpiece;
the lifting mechanism is arranged on the movable workbench, the polishing wheel is rotatably arranged on the lifting mechanism, and the lifting mechanism can drive the polishing wheel to adjust the position in the vertical direction;
the first driving mechanism is arranged on the movable workbench and can drive the polishing wheel to rotate;
the holding mechanism is rotatably arranged on the supporting mechanism; and the number of the first and second groups,
the second driving mechanism is used for driving the clamping mechanism to rotate;
the movable workbench can drive the polishing wheel to reciprocate along the direction parallel to the rotation axis of the clamping mechanism, and the lifting mechanism can drive the polishing wheel to reciprocate along the up-down direction.
Preferably, elevating system includes telescopic link, articulated seat and motion pole, articulated seat set up in on the mobile workbench, the first end of telescopic link articulate in on the mobile workbench and the second end of telescopic link with the first end of motion pole is articulated, the middle part of motion pole articulate through the pivot in articulated seat is last, the throwing aureola through installation axle rotatably install in on the second end of motion pole.
Preferably, the first driving mechanism includes a first motor and a pulley set, the pulley set includes a first pulley fixed to an output shaft of the first motor, a second pulley and a third pulley coaxially mounted on the rotating shaft, and a fourth pulley fixed to the mounting shaft, the first pulley and the second pulley are in transmission connection through a first transmission belt, the third pulley and the fourth pulley are in transmission connection through a second transmission belt, a diameter of the second pulley is greater than a diameter of the first pulley, and the fourth pulley drives the polishing wheel to rotate.
Preferably, the clamping mechanism comprises a chuck and a plurality of jaws, the jaws are arranged at a first end of the chuck at intervals along the circumferential direction and can move along the radial direction of the chuck, the clamping mechanism further comprises a transmission shaft fixedly arranged at a second end of the chuck, and the transmission shaft is rotatably arranged on the supporting mechanism.
Preferably, the second driving mechanism comprises a second motor and a speed reducer, the second motor is connected with the speed reducer through a first coupling, and the speed reducer is connected with the transmission shaft through a second coupling.
Preferably, the movable workbench comprises a movable plate, a third driving mechanism, an installation table and a fourth driving mechanism, the third driving mechanism is used for driving the movable plate to reciprocate along a first direction, the fourth driving mechanism is arranged on the movable plate and is used for driving the installation table to reciprocate along a second direction, the first direction is parallel to the rotation axis direction of the clamping mechanism, and the first direction is perpendicular to the second direction.
Preferably, the third driving mechanism includes a base, a stepping motor, a lead screw, a slider and a guide rail, the stepping motor and the lead screw are both mounted on the base, an output shaft of the stepping motor is in butt joint with the lead screw, the guide rail is arranged in parallel with the lead screw, the slider can slide on the lead screw along the guide rail, and the moving plate is fixedly mounted on the slider.
Preferably, the workpiece is a deep groove ball bearing outer ring.
Preferably, the moving-pole magnetorheological polishing device further comprises a suction-injection mechanism for injecting the magnetorheological fluid into the workpiece or sucking the magnetorheological fluid out of the workpiece.
In addition, the invention also provides a magnetorheological polishing method for polishing by adopting the movable magnetic pole magnetorheological polishing device, which comprises the following steps:
clamping a workpiece on a clamping mechanism, and mounting magnetorheological fluid on the workpiece;
moving a polishing wheel to be close to the surface to be polished of the workpiece;
starting a first driving mechanism to drive the polishing wheel to rotate;
starting a second driving mechanism to drive the clamping mechanism to rotate;
starting a movable workbench to drive the polishing wheel to reciprocate along the direction parallel to the rotation axis of the clamping mechanism;
starting a lifting mechanism to drive the polishing wheel to reciprocate along the up-down direction;
finishing polishing the surface to be polished of the workpiece after a preset time.
(III) advantageous effects
The invention has the beneficial effects that:
1. according to the invention, a proper amount of magnetorheological fluid is filled in the inner wall of the cylindrical workpiece, and under the action of a magnetic field generated by the permanent magnet on the polishing wheel, the magnetorheological fluid after flowing is in better contact with the inner wall of the workpiece, so that the polishing efficiency is improved, and the polishing precision is high.
2. According to the invention, the movable workbench drives the polishing wheel to move along the horizontal direction and perform displacement compensation, the lifting mechanism enables the polishing wheel to move in the vertical direction, the position of the polishing wheel on the inner wall of the workpiece is comprehensively controlled, the surface of the inner wall of the workpiece is polished more uniformly, and the operation flow is simplified on the premise of ensuring the processing precision.
3. The invention has the advantages of compact structure, small occupied space, simple and convenient operation and energy conservation.
Drawings
FIG. 1 is a block diagram of a moving-pole magnetorheological finishing device in accordance with the present invention;
FIG. 2 is an enlarged view of the structure of the retaining mechanism, workpiece and support mechanism of FIG. 1;
FIG. 3 is an enlarged view of the movable table, the lifting mechanism, the first driving mechanism and the polishing mechanism of FIG. 1;
fig. 4 is a top view of fig. 3.
[ description of reference ]
1: a second motor; 2: a first coupling; 3: a speed reducer; 4: a second coupling; 5: a bearing; 6: a bearing cap; 7: a bearing seat; 8: a drive shaft; 9: a chuck; 10: a claw; 11: a workpiece; 12: a bevel gear; 13: an end cap; 14: a polishing wheel; 15: a fourth pulley; 16: a second pulley; 17: a first pulley; 18: a first drive belt; 19: a rotating shaft; 20: a first motor; 21: a telescopic rod; 22: an installation table; 23: moving the plate; 24: a stepping motor; 25: a lead screw; 26: a slider; 27: a base; 28: a permanent magnet; 29: a motion bar; 30: a guide rail; 31: a hinged seat; 32: a third pulley.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a moving magnetic pole magnetorheological polishing device, which comprises a clamping mechanism, a moving workbench, a polishing mechanism, a lifting mechanism, a first driving mechanism, a supporting mechanism and a second driving mechanism, as shown in figures 1 to 4. The clamping mechanism is used for clamping a workpiece 11 to be polished, the workpiece 11 is cylindrical, and magnetorheological fluid can be filled on the inner wall of the workpiece 11; the movable workbench can move horizontally; the polishing mechanism comprises a polishing wheel 14 and a permanent magnet 28 arranged in the polishing wheel 14, and the polishing wheel 14 can adsorb the magnetorheological fluid on the workpiece 11 and polish the workpiece 11; the lifting mechanism is arranged on the movable workbench, the polishing wheel 14 is rotatably arranged on the lifting mechanism, and the lifting mechanism can drive the polishing wheel 14 to adjust the position in the vertical direction; the first driving mechanism is arranged on the movable workbench and can drive the polishing wheel 14 to rotate; the clamping mechanism is rotatably arranged on the supporting mechanism; the second driving mechanism is used for driving the clamping mechanism to rotate. The movable workbench can drive the polishing wheel 14 to reciprocate along the direction parallel to the rotation axis of the clamping mechanism, and the lifting mechanism can drive the polishing wheel 14 to reciprocate along the up-down direction. In addition, the permanent magnet 28 is installed inside the polishing wheel 14, the permanent magnet 28 is made of neodymium iron boron magnet, the polishing wheel 14 is made of non-magnetic conducting material, and the strength of the magnetic field can reach 100 mT.
Because the inner wall of the cylindrical workpiece 11 is filled with a proper amount of magnetorheological fluid, under the action of a magnetic field generated by the permanent magnet 28 on the polishing wheel 14, the magnetorheological fluid after flowing is better contacted with the inner wall of the workpiece 11, the polishing efficiency is improved, and the polishing precision is high. And the movable workbench drives the polishing wheel 14 to move along the horizontal direction and perform displacement compensation, the lifting mechanism enables the polishing wheel 14 to move in the vertical direction, the position of the polishing wheel 14 on the inner wall of the workpiece 11 is comprehensively controlled, the surface of the inner wall of the workpiece 11 is more uniform, and the operation flow is simplified on the premise of ensuring the processing precision. The technical scheme has the advantages of compact structure, small occupied space, simple and convenient operation and energy conservation.
In a preferred embodiment, referring again to fig. 3 and 4, the lifting mechanism comprises a telescopic rod 21, a hinge seat 31 and a moving rod 29, the hinge seat 31 is disposed on the movable worktable, a first end of the telescopic rod 21 is hinged on the movable worktable and a second end of the telescopic rod 21 is hinged with a first end of the moving rod 29, a middle portion of the moving rod 29 is hinged on the hinge seat 31 through a rotating shaft 19, and the polishing wheel 14 is rotatably mounted on a second end of the moving rod 29 through a mounting shaft. By the extension and contraction motion of the telescopic rod 21, the motion rod 29 can be driven to rotate around the hinge seat 31, so that the up-and-down position of the polishing wheel 14 can be adjusted. Taking the direction shown in fig. 3 as an example, when the telescopic rod 21 is extended, the first end of the moving rod 29 moves upward, and the polishing wheel 14 descends; when the telescopic bar 21 is contracted, the first end of the moving bar 29 moves down and the polishing wheel 14 rises. Wherein, the telescopic link 21 can be an automatic telescopic mechanism such as a cylinder, a hydraulic cylinder or an electric telescopic link, so as to improve the automation degree of the whole device. The telescopic rod 21 on the movable workbench is fixed through a bolt, the telescopic action is controlled by a hydraulic element in the telescopic rod 21, and when the inner wall of the workpiece 11 is polished, the longitudinal position of the polishing wheel 14 and the inner wall of the workpiece 11 is controlled by controlling the extension and contraction of the telescopic rod 21 to adjust the rotation of the moving rod 29.
Further, as shown in fig. 4, the first driving mechanism includes a first motor 20 and a pulley set, the pulley set includes a first pulley 17 fixed on an output shaft of the first motor 20, a second pulley 16 and a third pulley 32 coaxially mounted on the rotating shaft 19, and a fourth pulley 15 fixed on the mounting shaft, the first pulley 17 is in transmission connection with the second pulley 16 through a first transmission belt 18, the third pulley 32 is in transmission connection with the fourth pulley 15 through a second transmission belt (not shown), a diameter of the second pulley 16 is larger than a diameter of the first pulley 17, and the fourth pulley 15 drives the polishing wheel 14 to rotate. Specifically, the first motor 20 is fixed on the mounting table 22 through bolt coupling, the first motor 20 drives the first pulley 17 through a flat key, the first pulley 17 drives the second pulley 16 through the first transmission belt 18, the second pulley 16 and the third pulley 32 are fixed together, the second pulley 16 and the third pulley 32 are sleeved on the rotating shaft 19 through a small bearing, and the second transmission belt drives the fourth pulley 15 to rotate, so as to drive the polishing wheel 14 to rotate. The output speed of the first motor can be reduced by the pulley set to adjust the rotation speed transmitted to the polishing wheel 14. Moreover, the belt wheel is adopted to transmit torque, so that the limitation on the installation position of the motor can be reduced. In other embodiments, other drive assemblies may be used in place of the pulley sets.
In addition, in a preferred embodiment, as shown in fig. 2, the holding mechanism comprises a chuck 9 and a plurality of jaws 10, the jaws 10 are circumferentially spaced at a first end of the chuck 9, the jaws 10 can move along the radial direction of the chuck 9, the holding mechanism further comprises a transmission shaft 8 fixedly arranged at a second end of the chuck 9, the transmission shaft 8 is rotatably arranged on the supporting mechanism, and the chuck 9 and the transmission shaft 8 are coupled by screw threads to transmit torque. Specifically, the workpiece 11 is fixed to the chuck 9 by rotating the bevel gear 12 on the chuck 9 with a wrench to move the jaws 10. In order to ensure the machining precision, the workpiece 11 must be clamped firmly, so a three-jaw chuck is used for clamping the workpiece 11, the three jaws 10 on the chuck 9 are connected with the chuck 9 through plane threads, a wrench is used for rotating the bevel gear 12, and the bevel gear 12 drives the plane threads to further drive the three jaws to move synchronously, so that the workpiece 11 is clamped.
Wherein, for providing stable support for the clamping mechanism, the supporting mechanism comprises a bearing seat 7, a bearing cover 6 and a bearing 5, the bearing seat 7 is butted with the bearing cover 6, an installation through hole is formed between the bearing seat 7 and the bearing cover 6, and a transmission shaft 8 is installed in the installation through hole through the bearing 5. Preferably, the bearing 5 may be an angular contact ball bearing, with which axial and angular direction errors of the drive shaft 8 can be compensated.
Further, referring again to fig. 1, the second driving mechanism includes a second motor 1 and a speed reducer 3, the second motor 1 is connected with the speed reducer 3 through a first coupling 2, and the speed reducer 3 is connected with the transmission shaft 8 through a second coupling 4. The second motor 1 may preferably be an YD-B3 motor, and in other embodiments, the model of the second motor 1 may be selected according to actual conditions. The first coupling 2 and the second coupling 4 may both be a quincunx elastic coupling to achieve efficient and stable torque transmission. The YD-B3 motor is connected with the speed reducer 3 through the first coupler 2 and is coaxially arranged with the transmission shaft 8, and the transmission shaft 8 is supported through the first coupler 2, the second coupler 4 and the bearing seat 7 and drives the chuck 9 to realize the relative motion of the workpiece 11 and the polishing wheel 14.
As shown in fig. 1, in a preferred embodiment, the movable table includes a movable plate 23, a third driving mechanism for driving the movable plate 23 to move back and forth along a first direction, a mounting table 22 disposed on the movable plate 23 for driving the mounting table 22 to move back and forth along a second direction, the first direction being parallel to the rotation axis direction of the holding mechanism, so that the polishing wheel 14 is always in the same vertical plane with the rotation axis of the holding mechanism when polishing the workpiece 11, and the first direction is perpendicular to the second direction, so that the position of the polishing wheel 14 can be adjusted in the second direction as required.
Referring to fig. 1 again, in order to provide stable reciprocating power for the moving table, the third driving mechanism includes a base 27, a stepping motor 24, a lead screw 25, a slider 26 and a guide rail 30, the stepping motor 24 and the lead screw 25 are both mounted on the base 27, an output shaft of the stepping motor 24 is in butt joint with the lead screw 25, the guide rail 30 is arranged in parallel with the lead screw 25, the slider 26 can slide on the lead screw along the guide rail 30, and the moving plate 23 is fixedly mounted on the slider 26. Wherein the screw 25 is a ball screw. The stepping motor 24 can output forward and reverse rotation torque according to the control instruction, and drive the lead screw 25 to rotate forward or backward, so that the slider 26 reciprocates along the extending direction of the guide rail 30, and the moving plate 23 can be driven to reciprocate.
In addition, the fourth driving mechanism may include a slide rail and a telescopic cylinder both disposed on the moving plate 23, the mount 22 may be capable of sliding along the slide rail, and the telescopic cylinder connects the moving plate 23 and the mount 22. The telescopic cylinder may be an air cylinder or a hydraulic cylinder, and the mounting table 22 may be controlled to slide back and forth along the slide rail by controlling the telescopic action of the telescopic cylinder.
In the preferred embodiment, the workpiece 11 is an outer ring of a deep groove ball bearing, and a groove on the inner wall of the workpiece can be used for accommodating magnetorheological fluid. In other embodiments, the workpiece 11 may also be an outer ring of another bearing or another cylindrical structure, such as a sleeve. Since a proper amount of magnetorheological fluid is placed at the bottom of the inner wall of the workpiece 11 (specifically, the outer ring of the deep groove ball bearing), the magnetorheological fluid is required to be prevented from leaking, and the requirement that the movement of the polishing wheel 14 on the movable rod 29 is not interfered is met, so that an end cover 13 is arranged, and a hole is formed in the end cover 13 according to the comprehensive displacement of the polishing wheel 14, so that the end cover 13 is formed into an annular shape, and the polishing wheel 14 can be ensured to normally work.
In addition, the moving magnetic pole magnetorheological polishing device further comprises a suction and injection mechanism for injecting the magnetorheological fluid into the workpiece 11 or sucking the magnetorheological fluid from the workpiece 11, so that the magnetorheological fluid is added or removed by self, and the integral automation degree of the device is further improved.
The technical scheme of the invention is further described by specifically describing the working process of polishing the outer ring of the deep groove ball bearing by using the moving magnetic pole magnetorheological polishing device.
The upper bevel gear of the chuck 9 is rotated through a wrench, so that the clamping jaws 10 move, the outer ring of the deep groove ball bearing is fixed on the chuck 9, the outer ring of the deep groove ball bearing is driven by a second motor 1(YD-B3 motor), the speed of the outer ring is regulated by a speed reducer 3, the chuck 9 is driven to rotate by a first coupler 2 and a second coupler 4, the permanent magnet 28 is fixed inside the polishing wheel 14, the movable workbench is fixed on the left side of the chuck 9, the movable plate 23 is connected with the sliding block 26 and the lead screw 25, and the lead screw 25 is fixed on the base 27 and connected with the stepping motor 24. Under the drive of the stepping motor 24, the screw rod 25 drives the movable worktable to do reciprocating linear motion, thereby controlling the horizontal displacement of the polishing wheel 14. The longitudinal displacement of the polishing wheel 14 is realized by adjusting the rotation of the motion rod 29 around the rotating shaft 19 through the extension and contraction of the telescopic rod 21. The horizontal displacement of the polishing wheel 14 is compensated by the motion of the controlled reciprocating table, the longitudinal displacement of the polishing wheel 14 is compensated by the expansion and contraction of the controlled telescopic rod 21, and a proper amount of magnetorheological fluid is arranged on the inner wall of the outer ring of the deep groove ball bearing.
Wherein, a proper amount of magnetorheological fluid is stored at the bottom of the inner wall of the outer ring of the deep groove ball bearing, and the magnetorheological fluid generates rheological effect under the action of a magnetic field and is adsorbed on the polishing wheel 14. When the transmission shaft 8 does not rotate, the outer ring of the deep groove ball bearing fixed on the chuck 9 does not rotate, only the polishing wheel 14 rotates, and only the polishing of the fixed area of the inner surface of the outer ring of the deep groove ball bearing is realized. When the YD-B3 motor drives the transmission shaft 8 to rotate, the workpiece 11 and the polishing wheel 14 move compositely, and the whole inner surface of the outer ring of the deep groove ball bearing can be polished.
Specifically, before the displacement of the polishing wheel 14 is controlled, the position of the polishing wheel 14 and the inner surface of the outer ring of the deep groove ball bearing reaches a required initial position by adjusting the movable workbench, the longitudinal distance between the polishing wheel 14 and the inner surface of the workpiece 11 is adjusted by the movable plate 23, and the transverse distance between the polishing wheel 14 and the inner surface of the workpiece 11 is adjusted by the mounting workbench 22, so that the initial polishing position is fixed, the initial position of each polishing is guaranteed to be fixed, and each polishing process can be normally carried out. When the inner wall of the outer ring of the deep groove ball bearing is polished, the movable rod 29 rotates along with the extension and contraction of the telescopic rod 21, so that the polishing wheel 14 on the movable rod 29 moves longitudinally; the slider 26 is arranged below the mounting table 22, the lead screw 25 matched with the slider 26 is fixed on the base 27 and connected with the stepping motor 24, and the mounting table 22 can drive the polishing wheel 14 to horizontally reciprocate by the driving of the stepping motor 24, so that the comprehensive displacement of the polishing wheel 14 is controlled, and higher polishing precision can be achieved. It should be noted that the axes of the polishing wheel 14 and the outer ring of the deep groove ball bearing are ensured to be in the same vertical plane, so as to ensure that the inner wall can be polished uniformly.
In addition, the invention also provides a magnetorheological polishing method for polishing by adopting the moving magnetic pole magnetorheological polishing device, wherein the magnetorheological polishing method comprises the following steps:
clamping the workpiece 11 on the clamping mechanism, and mounting magnetorheological fluid on the workpiece 11;
moving the polishing wheel 14 to be close to the surface to be polished of the workpiece 11;
starting the first driving mechanism to drive the polishing wheel 14 to rotate;
starting a second driving mechanism to drive the clamping mechanism to rotate;
starting the movable worktable to drive the polishing wheel 14 to reciprocate along the direction parallel to the rotation axis of the clamping mechanism;
starting the lifting mechanism to drive the polishing wheel 14 to reciprocate along the up-down direction;
the polishing of the surface to be polished of the workpiece 11 is completed after a predetermined time.
When the moving magnetic pole magnetorheological fluid polishing device is used for polishing, after the device is installed and fixed, the workpiece 11 is fixedly clamped by the chuck 9 and the clamping jaws 10, the polishing wheel 14 is adjusted to an initial polishing position, the second motor 1, the first motor 20 and the stepping motor 24 are started and controlled to drive, the workpiece 11 is driven to rotate after the speed of the polishing wheel 14 is adjusted by the speed reducer 3, the workpiece 11 and the polishing wheel 14 generate composite relative motion, and the magnetorheological fluid on the inner wall of the workpiece 11 generates rheological effect under the action of the magnetic field of the permanent magnet 28 in the polishing wheel 14, so that the apparent viscosity and the yield stress of the magnetorheological fluid are rapidly increased. By controlling the relative position of the polishing wheel 14 and the workpiece 11, the polishing precision and polishing uniformity of the workpiece 11 can be improved, the device can be compact, and the space utilization rate can be improved.
It should be understood that the above description of specific embodiments of the present invention is only for the purpose of illustrating the technical lines and features of the present invention, and is intended to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, but the present invention is not limited to the above specific embodiments. It is intended that all such changes and modifications as fall within the scope of the appended claims be embraced therein.
Claims (8)
1. A moving-pole magnetorheological finishing device, comprising:
the clamping mechanism is used for clamping a workpiece to be polished, the workpiece is cylindrical, and magnetorheological fluid can be filled on the inner wall of the workpiece;
a movable table capable of horizontal movement;
the polishing mechanism comprises a polishing wheel and a permanent magnet arranged in the polishing wheel, and the polishing wheel can adsorb the magnetorheological fluid on the workpiece and polish the workpiece;
the lifting mechanism is arranged on the movable workbench, the polishing wheel is rotatably arranged on the lifting mechanism, and the lifting mechanism can drive the polishing wheel to adjust the position in the vertical direction;
the first driving mechanism is arranged on the movable workbench and can drive the polishing wheel to rotate;
the holding mechanism is rotatably arranged on the supporting mechanism; and the number of the first and second groups,
the second driving mechanism is used for driving the clamping mechanism to rotate;
the movable workbench can drive the polishing wheel to reciprocate along the direction parallel to the rotation axis of the clamping mechanism, and the lifting mechanism can drive the polishing wheel to reciprocate along the up-down direction;
the lifting mechanism comprises a telescopic rod, a hinge seat and a moving rod, the hinge seat is arranged on the moving workbench, the first end of the telescopic rod is hinged to the moving workbench, the second end of the telescopic rod is hinged to the first end of the moving rod, the middle part of the moving rod is hinged to the hinge seat through a rotating shaft, and the polishing wheel is rotatably arranged at the second end of the moving rod through a mounting shaft;
first actuating mechanism includes first motor and band pulley group, band pulley group is including being fixed in first band pulley on the output shaft of first motor, coaxial arrangement in change epaxial second band pulley and third band pulley and be fixed in install epaxial fourth band pulley, first band pulley with the second band pulley passes through first drive belt transmission and connects, the third band pulley with the fourth band pulley passes through second drive belt transmission and connects, the diameter of second band pulley is greater than the diameter of first band pulley, the fourth band pulley drive the throwing aureola is rotatory.
2. The moving pole magnetorheological finishing device of claim 1, wherein: the clamping mechanism comprises a chuck and a plurality of jaws, the jaws are arranged at the first end of the chuck at intervals in the circumferential direction and can be moved along the radial direction of the chuck, the clamping mechanism further comprises a transmission shaft fixedly arranged at the second end of the chuck, and the transmission shaft is rotatably arranged on the supporting mechanism.
3. The moving pole magnetorheological finishing device of claim 2, wherein: the second driving mechanism comprises a second motor and a speed reducer, the second motor is connected with the speed reducer through a first coupler, and the speed reducer is connected with the transmission shaft through a second coupler.
4. The moving pole magnetorheological finishing device of claim 1, wherein: the movable workbench comprises a movable plate, a third driving mechanism, an installation table and a fourth driving mechanism, the third driving mechanism is used for driving the movable plate to reciprocate along a first direction, the fourth driving mechanism is arranged on the movable plate and is used for driving the installation table to reciprocate along a second direction, the first direction is parallel to the rotation axis direction of the clamping mechanism, and the first direction is perpendicular to the second direction.
5. The moving pole magnetorheological finishing device of claim 4, wherein: the third driving mechanism comprises a base, a stepping motor, a lead screw, a sliding block and a guide rail, wherein the stepping motor and the lead screw are installed on the base, an output shaft of the stepping motor is in butt joint with the lead screw, the guide rail is arranged in parallel with the lead screw, the sliding block can slide on the lead screw along the guide rail, and the moving plate is fixedly installed on the sliding block.
6. The moving pole magnetorheological finishing device of claim 1, wherein: the workpiece is a deep groove ball bearing outer ring.
7. The moving pole magnetorheological finishing device of claim 1, wherein: the moving magnetic pole magnetorheological polishing device further comprises a suction and injection mechanism for injecting the magnetorheological fluid into the workpiece or sucking the magnetorheological fluid out of the workpiece.
8. A magnetorheological finishing method using the moving pole magnetorheological finishing device of any one of claims 1 to 7 for finishing, wherein the magnetorheological finishing method comprises the following steps:
clamping a workpiece on a clamping mechanism, and mounting magnetorheological fluid on the workpiece;
moving a polishing wheel to be close to the surface to be polished of the workpiece;
starting a first driving mechanism to drive the polishing wheel to rotate;
starting a second driving mechanism to drive the clamping mechanism to rotate;
starting a movable workbench to drive the polishing wheel to reciprocate along the direction parallel to the rotation axis of the clamping mechanism;
starting a lifting mechanism to drive the polishing wheel to reciprocate along the up-down direction;
finishing polishing the surface to be polished of the workpiece after a preset time.
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| CN201910184244.2A CN109759909B (en) | 2019-03-12 | 2019-03-12 | Moving magnetic pole magnetorheological polishing device and method |
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| CN201910184244.2A CN109759909B (en) | 2019-03-12 | 2019-03-12 | Moving magnetic pole magnetorheological polishing device and method |
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| CN107186551B (en) * | 2017-06-30 | 2019-01-01 | 辽宁科技大学 | A kind of ceramics pipe internal surface burnishing device and polishing method |
| CN107791107B (en) * | 2017-11-16 | 2019-06-07 | 东北大学 | A kind of titanium alloy tube inner wall magnetic rheological polishing method and device |
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