CN112720239B - Method for polishing inner and outer surfaces of bearing ring by rotational flow tumbling process - Google Patents
Method for polishing inner and outer surfaces of bearing ring by rotational flow tumbling process Download PDFInfo
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- CN112720239B CN112720239B CN202011607714.0A CN202011607714A CN112720239B CN 112720239 B CN112720239 B CN 112720239B CN 202011607714 A CN202011607714 A CN 202011607714A CN 112720239 B CN112720239 B CN 112720239B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
- B24B31/0224—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels the workpieces being fitted on a support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a method for polishing the inner and outer surfaces of a bearing ring by using a rotational flow tumbling process, which belongs to the field of surface treatment of bearing parts and aims to solve the problems of poor quality and consistency of the bearing surface and weaker usability, service life and safety of the conventional bearing surface polished by vibration polishing, and the method for polishing the inner and outer surfaces of the bearing ring by using the rotational flow tumbling process comprises the following steps: selecting equipment, and step two: selecting an abrasive, and step three: and (3) finishing the outer surface of the ferrule, and step four: processing the inner surface of the ferrule and the fifth step: the method is mainly used for grinding the inner surface and the outer surface of the bearing ring.
Description
Technical Field
The invention belongs to the field of surface treatment of bearing parts, and particularly relates to a method for polishing the inner surface and the outer surface of a bearing ring by using a rotational flow barreling process.
Background
At present, the surface treatment of the bearing adopts a vibration finishing method, and after finishing treatment, the surface quality of a bearing ring is not obviously improved, so that the difference with a foreign sample is large. The surface roughness of the bearing ring in China is high, machining lines left after machining are relatively obvious, sharp edges exist at positions such as a ring groove and a ring groove, chamfering transition is not smooth, and the color consistency of the ring is poor and not soft. And detecting the surface compressive stress of the bearing raceway, wherein the surface compressive stress of the foreign bearing raceway is generally 500-700MPa, and the sub-surface laminated stress depth layer of the raceway is 0.02-0.03 mm. The compressive stress of the surface of the domestic bearing raceway is generally 300-400MPa, and the depth layer of the secondary laminated stress of the raceway is less than 0.015 mm. In summary, the current domestic bearings delivered by people are difficult to meet the expectations of users. Therefore, the method for polishing the inner surface and the outer surface of the bearing ring by using the rotational flow barreling process can improve the surface quality of the bearing and the mechanical property of the bearing raceway in China, and the method is in line with the actual requirements.
Disclosure of Invention
The invention provides a method for polishing the inner and outer surfaces of a bearing ring by using a rotational flow tumbling process, aiming at solving the problems of poor quality and consistency of the surface of a bearing and weak usability, service life and safety after the surface of the bearing is polished by using vibration polishing in the prior art;
a method for polishing the inner and outer surfaces of a bearing ring by using a rotational flow tumbling process is realized by the following steps:
the method comprises the following steps: selecting equipment: the model of the selected rotational flow rolling finishing machine is BJG-X600B free grinding tool finishing equipment;
step two: selecting an abrasive: selecting a brown corundum abrasive with the abrasive size specification of 2-4 mm, and injecting the brown corundum abrasive into a material box of a rotational flow tumbling and polishing machine;
step three: and (3) finishing the outer surface of the ferrule: clamping the ferrule in a ferrule outer surface finishing fixture, installing the ferrule outer surface finishing fixture on a working spindle in a rotational flow roller finishing machine, driving the ferrule outer surface finishing fixture to enter a material box under the drive of the axial motion of the working spindle, ensuring that the ferrule outer surface finishing fixture is completely immersed in abrasive materials, grinding the ferrule outer surface for two times, controlling the working spindle to drive the ferrule outer surface finishing fixture to rotate forwards for the first time, driving the abrasive materials to rotate backwards by the material box, fully grinding the abrasive materials and the ferrule outer surface, wherein the first grinding time is 10min-20min, grinding for the second time after the first period of grinding is finished, controlling the working spindle to drive the ferrule outer surface finishing fixture to rotate backwards for the second time, driving the abrasive materials to rotate forwards by the material box, continuously fully grinding the abrasive materials and the ferrule outer surface, and the grinding time is 10min-20min, after the second grinding is finished, the ferrule outer surface finishing fixture leaves the material box under the driving of the axial movement of the working spindle, and the ferrule with the finished outer surface is detached from the ferrule outer surface finishing fixture;
step four: and (3) finishing the inner surface of the ferrule: clamping the ferrule with the finished outer surface in a ferrule inner surface finishing fixture, installing the ferrule inner surface finishing fixture on a working spindle in a rotational flow roller finishing machine, driving the ferrule inner surface finishing fixture to enter a material box under the axial motion of the working spindle, ensuring that the ferrule inner surface finishing fixture is completely immersed in the abrasive, starting to grind the inner surface of the ferrule for two times, controlling the working spindle to drive the ferrule inner surface finishing fixture to rotate forwards for the first time, driving the abrasive to rotate backwards by the material box, realizing the sufficient grinding of the abrasive and the ferrule outer surface, wherein the first grinding time is 5-15 min, grinding for the second time after the first period of grinding is finished, controlling the working spindle to drive the ferrule inner surface finishing fixture to rotate backwards for the second time, driving the abrasive to rotate forwards by the material box, continuing to fully grind the abrasive and the ferrule outer surface, and the grinding time is 5-15 min, after the second grinding is finished, the ferrule inner surface finishing fixture is driven by the axial movement of the working spindle to leave the work bin, and the ferrule with the finished inner surface is unloaded from the ferrule inner surface finishing fixture;
step five: carrying out quality inspection and acceptance on the bearing ring after the inner ring and the outer ring are finished;
further, when the outer surface of the ferrule is ground for the first time in the third step, the rotating speed of the working main shaft driving the polishing clamp for the outer surface of the ferrule to rotate forwards is 100-130 r/min, and the rotating speed of the material box driving the grinding materials to rotate backwards is 50-80 r/min;
further, when the outer surface of the ferrule is ground for the second time in the third step, the rotating speed of the working spindle driving the polishing clamp for the outer surface of the ferrule to rotate reversely is 100-130 r/min, and the rotating speed of the bin driving the grinding materials to rotate forwardly is 50-80 r/min;
further, when the inner surface of the ferrule is ground for the first time in the fourth step, the rotating speed of the working main shaft driving the ferrule inner surface finishing fixture to rotate forwards is 60-90 r/min, and the rotating speed of the material box driving the grinding materials to rotate backwards is 40-70 r/min;
further, when the inner surface of the ferrule is ground for the second time in the fourth step, the rotating speed of the working main shaft driving the polishing clamp on the inner surface of the ferrule to rotate reversely is 60-90 r/min, and the rotating speed of the material box driving the grinding materials to rotate forwardly is 40-70 r/min;
furthermore, the polishing clamp for the outer surface of the ferrule in the third step comprises a clamping shaft, an upper clamping cover, a lower clamping cover and two locking nuts, wherein the clamping shaft is sequentially provided with a clamping section, an upper screw thread section, a workpiece setting section and a lower screw thread section, the upper clamping cover is sleeved on the upper screw thread section of the clamping shaft, the lower clamping cover is sleeved on the lower screw thread section of the clamping shaft, a locking nut is arranged at one end of the upper clamping cover away from the workpiece setting section, the locking nut is sleeved on the upper screw thread section of the clamping shaft, the locking nut is arranged at one end of the lower clamping cover away from the workpiece setting section, the locking nut is sleeved on the lower screw thread section of the clamping shaft, the two locking nuts are both in threaded connection with the clamping shaft, the polishing clamp for the outer surface of the ferrule is arranged on a working main shaft of the spin roll polishing machine through the clamping section of the clamping shaft, the ferrule is sleeved on the workpiece setting section of the first clamping shaft and is clamped and fixed through the first upper clamping cover and the first lower clamping cover;
further, the polishing clamp for the inner surface of the fourth middle ferrule comprises a second clamping shaft, a second upper clamping cover, a second lower clamping cover and two second locking nuts, wherein the second clamping shaft is sequentially provided with a clamping section, an upper screw thread section, a light shaft section and a lower screw thread section, the second upper clamping cover is sleeved on the upper screw thread section of the second clamping shaft, the second lower clamping cover is sleeved on the lower screw thread section of the second clamping shaft, the second upper clamping cover and the second lower clamping cover are oppositely arranged, one second locking nut is arranged at one end of the second upper clamping cover, which is far away from the second lower clamping cover, the second locking nut is sleeved on the upper screw thread section of the second clamping shaft, the other second locking nut is arranged at one end of the second lower clamping cover, which is far away from the second upper clamping cover, the second locking nut is sleeved on the lower screw thread section of the second clamping shaft, and the two second locking nuts are both in threaded connection with the second clamping shaft, the inner surface polishing clamp of the ferrule is arranged on a working main shaft of the rotational flow roller polishing complete machine through a clamping section of a second clamping shaft, the ferrule is arranged between a second upper clamping cover and a second lower clamping cover and is clamped and fixed through the second upper clamping cover and the second lower clamping cover, and the axis of the ferrule is perpendicular to the axis of the second clamping shaft;
further, the structure of the second upper clamping cover is the same as that of the second lower clamping cover;
the second upper clamping cover comprises an upper plate body and N upper semicircular clamps, N is a positive integer, a through hole is processed in the center of the upper plate body, an upper thread section of the second clamping shaft is arranged in the through hole of the upper plate body, the N upper semicircular clamps are arranged on the lower surface of the upper plate body at equal intervals along the length direction of the upper plate body, and the arc top of each upper semicircular clamp is fixedly connected with the lower surface of the upper plate body;
the second lower clamping cover comprises a lower plate body and N lower semi-annular clamps, wherein N is a positive integer, a through hole is processed in the center of the lower plate body, the lower thread section of the second clamping shaft is arranged in the through hole of the lower plate body, the N lower semi-annular clamps are equidistantly arranged on the upper surface of the lower plate body along the length direction of the lower plate body, each lower semi-annular clamp corresponds to one upper semi-annular clamp, and the arc top of each lower semi-annular clamp is fixedly connected with the upper surface of the lower plate body;
one side of the second upper clamping cover, which is provided with the upper semi-annular clamp, is opposite to one side of the second lower clamping cover, which is provided with the lower semi-annular clamp;
further: the value range of N is 1-5.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a method for polishing the inner and outer surfaces of a bearing ring by using a rotational flow barreling process, wherein the grinding amount of a part subjected to barreling polishing is only 0.001-0.002mm, so that the original dimensional precision of the part is not damaged, and the polishing degree and the surface quality of the part are obviously improved.
2. The invention provides a method for polishing the inner and outer surfaces of a bearing ring by using a rotational flow tumbling process, and the surface quality of a part processed by the method is obviously improved, which is characterized in that the surface roughness of edges, corners, edges, grooves and holes of the part is obviously reduced, the fillet transition is uniform and smooth, the surface color is consistent, the whole part is fine and smooth, and the appearance quality is obviously better than that of vibration polishing.
3. The invention provides a method for finishing the inner and outer surfaces of a bearing ring by utilizing a rotational flow barreling process, the residual stress state of the surface of a part processed by the method is also obviously improved, after the existing vibration finishing, the surface compressive stress of a ring raceway is generally 300-400MPa, and the sub-surface lamination stress depth layer of the ring raceway is less than 0.015 mm; after the roll grinding and finishing are adopted, the surface compressive stress of the raceway of the ferrule reaches 500-1000MPa, and the laminated stress depth layer of the secondary surface of the raceway is 0.02-0.03mm, which is nearly 3 times higher than that of a vibration finishing and is equivalent to the level of the international similar bearing, and the service life and the safety of the bearing can be correspondingly improved along with the improvement of the mechanical property of the bearing.
Drawings
FIG. 1 is a front view of a ferrule outer surface finishing fixture according to the present invention;
FIG. 2 is a schematic bottom view of a ferrule outer surface finishing fixture according to the present invention;
FIG. 3 is a front view of a ferrule inner surface finishing fixture according to the present invention;
FIG. 4 is a side view of a ferrule inner surface finishing jig according to the present invention
The drawing comprises a ferrule outer surface finishing clamp 1, a first clamping shaft 11, a first locking nut 12, a first upper clamping cover 13, a first lower clamping cover 14, a ferrule inner surface finishing clamp 2, a second clamping shaft 21, a second locking nut 22, a second upper clamping cover 23, a second lower clamping cover 24 and a ferrule 3.
Detailed Description
The first specific implementation way is as follows: the present embodiment is described with reference to fig. 1 to 4, and provides a method for polishing the inner and outer surfaces of a bearing ring by a rotational flow tumbling process, which is implemented by the following steps:
the method comprises the following steps: selecting equipment: the model of the selected rotational flow rolling finishing machine is BJG-X600B free grinding tool finishing equipment;
step two: selecting an abrasive: selecting a brown corundum abrasive material with the abrasive size specification of 2-4 mm, and injecting the brown corundum abrasive material into a material box of a rotational flow tumbling and polishing machine;
step three: and (3) finishing the outer surface of the ferrule: clamping a ferrule in a ferrule outer surface finishing clamp 1, installing the ferrule outer surface finishing clamp 1 on a working main shaft in a rotational flow roll finishing machine, driving the ferrule outer surface finishing clamp 1 to enter a material box under the drive of the axial motion of the working main shaft, ensuring that the ferrule outer surface finishing clamp 1 is completely immersed with abrasive materials, starting to grind the ferrule outer surface for two times, controlling the working main shaft to drive the ferrule outer surface finishing clamp 1 to rotate forwards for the first grinding, driving the abrasive materials to rotate backwards for the material box to fully grind the abrasive materials and the ferrule outer surface, wherein the first grinding time is 10min-20min, grinding for the second time after the first grinding is finished, controlling the working main shaft to drive the ferrule outer surface finishing clamp 1 to rotate backwards for the second time, driving the abrasive materials to rotate forwards for the material box to continuously fully grind the abrasive materials and the ferrule outer surface, and the grinding time is 10min-20min, after the second grinding is finished, the ferrule outer surface finishing fixture 1 leaves the material box under the driving of the axial movement of the working spindle, and the ferrule with the finished outer surface is unloaded from the ferrule outer surface finishing fixture 1;
step four: and (3) polishing the inner surface of the ferrule: clamping the ferrule with the finished outer surface in a ferrule inner surface finishing clamp 2, installing the ferrule inner surface finishing clamp 2 on a working spindle in a rotational flow roll finishing machine, driving the ferrule inner surface finishing clamp 2 to enter a material box under the axial movement of the working spindle, ensuring that the ferrule inner surface finishing clamp 2 is completely immersed in the abrasive material, starting to grind the inner surface of the ferrule for two times, controlling the working spindle to drive the ferrule inner surface finishing clamp 2 to rotate forwards for the first grinding, driving the abrasive material to rotate backwards by the material box to fully grind the abrasive material and the ferrule outer surface, controlling the working spindle to drive the ferrule inner surface finishing clamp 2 to rotate backwards for the second grinding, driving the abrasive material to rotate forwards by the material box to continuously fully grind the abrasive material and the ferrule outer surface, the grinding time is 5min-15min, after the second grinding is finished, the ferrule inner surface finishing fixture 2 leaves the work bin under the driving of the axial movement of the working spindle, and the ferrule with the finished inner surface is unloaded from the ferrule inner surface finishing fixture 2;
step five: and (4) carrying out quality inspection and acceptance on the bearing ring after the inner ring and the outer ring are finished.
The embodiment provides a method for polishing the inner and outer surfaces of a bearing ring by using a rotational flow barreling process, the grinding amount of a part polished by barreling is only 0.001-0.002mm, the original size precision of the part is guaranteed not to be damaged, and the polishing degree and the surface quality of the part are obviously improved;
the abrasive material selection basis is that the brown corundum abrasive material has stronger cutting performance, meanwhile, the resistance generated in the process of rotating motion of irregular small-size abrasive materials is smaller, the bearing ring is slightly ground and cut sufficiently, and the surface is uniform and compact after the bearing is polished and machined, so that the bearing is suitable for a rotational flow polishing machine;
the inner surface and the outer surface of the ferrule need to be ground twice during processing, and the rotating directions of the main shaft and the feed box are opposite, so that the grinding uniformity of the surface of the ferrule is more facilitated.
The second embodiment is as follows: the third step is further defined as the first step, in the third step, when the outer surface of the ferrule is ground for the first time, the rotation speed of the working spindle driving the outer surface finishing fixture 1 of the ferrule to rotate forward is 100-130 r/min, and the rotation speed of the bin driving the grinding material to rotate backward is 50-80 r/min. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: referring to fig. 1 to 4, this embodiment is described, and is further limited to the third step described in the second embodiment, in this embodiment, when the outer surface of the ferrule is ground for the second time in the third step, the rotation speed at which the working spindle drives the outer surface finishing fixture 1 of the ferrule to rotate reversely is 100 to 130r/min, and the rotation speed at which the bin drives the abrasive to rotate forwardly is 50 to 80 r/min. The other components and the connection mode are the same as the second embodiment mode.
The fourth concrete implementation mode: the present embodiment is described with reference to fig. 1 to 4, and the present embodiment further defines the fourth step of the third embodiment, in the fourth step, when the inner surface of the ferrule is ground for the first time, the rotation speed of the working spindle driving the ferrule inner surface finishing fixture 2 to rotate forward is 60 to 90r/min, and the rotation speed of the bin driving the abrasive to rotate backward is 40 to 70 r/min.
The fifth concrete implementation mode is as follows: the fourth step is further defined by referring to fig. 1 to 4, and in the fourth step, when the inner surface of the ferrule is ground for the second time, the rotation speed of the working spindle driving the ferrule inner surface finishing fixture 2 to rotate reversely is 60 to 90r/min, and the rotation speed of the bin driving the abrasive to rotate forwardly is 40 to 70 r/min. Other components and connection modes are the same as those of the fourth embodiment.
According to the arrangement, the rotating speed is selected according to the principle that in the rotational flow tumbling and polishing process, the linear speed of the grinding material relative to the cutting of the ferrule is a main parameter influencing the polishing quality, and when the linear speed is fixed, the rotating speed of the spindle and the material box during polishing of the outer surface of the ferrule is higher than that during polishing of the inner surface. And adjusting according to the specification and the size consumption of the ferrule and the rotating speed range of the equipment.
The sixth specific implementation mode: referring to fig. 1 to 4, this embodiment is described, and the present embodiment further defines the ring outer surface finishing fixture 1 according to the fifth embodiment, in this embodiment, the ring outer surface finishing fixture 1 in the third step includes a first clamping shaft 11, a first upper clamping cover 13, a first lower clamping cover 14, and two first locking nuts 12, the first clamping shaft 11 is sequentially provided with a clamping section, an upper thread section, a workpiece setting section, and a lower thread section, the first upper clamping cover 13 is sleeved on the upper thread section of the first clamping shaft 11, the first lower clamping cover 14 is sleeved on the lower thread section of the first clamping shaft 11, the first locking nut 12 is disposed on one end of the first upper clamping cover 13 away from the workpiece setting section, the first locking nut 12 is sleeved on the upper thread section of the first clamping shaft 11, the other first locking nut 12 is disposed on one end of the first lower clamping cover 14 away from the workpiece setting section, and a first locking nut 12 is sleeved on the lower thread section of a first clamping shaft 11, two first locking nuts 12 are both in threaded connection with the first clamping shaft 11, a ferrule outer surface finishing clamp 1 is installed on a working spindle of a rotational flow roller finishing machine through a clamping section of the first clamping shaft 11, a ferrule 3 is sleeved on a workpiece setting section of the first clamping shaft 11 and is clamped and fixed with other components through a first upper clamping cover 13 and a first lower clamping cover 14, and the connection mode is the same as the fifth embodiment mode.
The seventh embodiment: referring to fig. 1 to 4, this embodiment is described, and the present embodiment further defines the ferrule inner surface finishing jig 2 according to the sixth embodiment, in this embodiment, the ferrule inner surface finishing jig 2 in the fourth step includes a second clamping shaft 21, a second upper clamping cover 23, a second lower clamping cover 24, and two second locking nuts 22, the second clamping shaft 21 is sequentially provided with a clamping section, an upper threaded section, an optical shaft section, and a lower threaded section, the second upper clamping cover 23 is sleeved on the upper threaded section of the second clamping shaft 21, the second lower clamping cover 24 is sleeved on the lower threaded section of the second clamping shaft 21, the second upper clamping cover 23 and the second lower clamping cover 24 are oppositely disposed, one second locking nut 22 is disposed on one end of the second upper clamping cover 23 away from the second lower clamping cover 24, the second locking nut 22 is sleeved on the upper threaded section of the second clamping shaft 21, the other second locking nut 22 is disposed on one end of the second lower clamping cover 24 away from the second upper clamping cover 23, and No. two lock nuts 22 are sleeved on the lower thread section of the No. two clamping shafts 21, two No. two lock nuts 22 are both in threaded connection with the No. two clamping shafts 21, the ring inner surface finishing clamp 2 is installed on a working main shaft of a rotational flow roller finishing machine through the clamping section of the No. two clamping shafts 21, the ring 3 is arranged between the No. two upper clamp covers 23 and the No. two lower clamp covers 24 and is clamped and fixed through the No. two upper clamp covers 23 and the No. two lower clamp covers 24, and the axis of the ring 3 is perpendicular to the axis of the No. two clamping shafts 21. Other components and connection modes are the same as those of the sixth embodiment.
According to the arrangement, the ferrule is the ring body, different clamps are correspondingly designed when the inner surface and the outer surface of the ferrule are ground, so that the best grinding effect can be achieved, when the outer surface of the ferrule is ground, two end faces of the ferrule are used as clamping and positioning reference surfaces, the outer surface of the ferrule is ensured to be in contact with the grinding materials, the inner surface of the ferrule is protected when the outer surface of the ferrule is ground, when the inner surface of the ferrule is ground, the annular outer wall of the ferrule is used as the clamping and positioning reference surface, the inner surface of the ferrule is ensured to be in contact with the grinding materials, and the outer surface of the ferrule is protected when the inner surface of the ferrule is ground.
The specific implementation mode is eight: the present embodiment is described with reference to fig. 1 to 4, and the present embodiment further defines the second upper clip cover 23 and the second lower clip cover 24 according to the seventh embodiment, and in the present embodiment, the second upper clip cover 23 and the second lower clip cover 24 have the same structure;
the second upper clamping cover 23 comprises an upper plate body and N upper semicircular clamps, wherein N is a positive integer, a through hole is processed in the center of the upper plate body, the upper thread section of the second clamping shaft 21 is arranged in the through hole of the upper plate body, the N upper semicircular clamps are equidistantly arranged on the lower surface of the upper plate body along the length direction of the upper plate body, and the arc top of each upper semicircular clamp is fixedly connected with the lower surface of the upper plate body;
the second lower clamping cover 24 comprises a lower plate body and N lower semi-annular clamps, wherein N is a positive integer, a through hole is processed in the center of the lower plate body, the lower thread section of the second clamping shaft 21 is arranged in the through hole of the lower plate body, the N lower semi-annular clamps are equidistantly arranged on the upper surface of the lower plate body along the length direction of the lower plate body, each lower semi-annular clamp corresponds to one upper semi-annular clamp, and the arc top of each lower semi-annular clamp is fixedly connected with the upper surface of the lower plate body;
one side of the second upper clamping cover 23, on which the upper semi-annular clamp is arranged, is opposite to one side of the second lower clamping cover 24, on which the lower semi-annular clamp is arranged. The other components and the connection mode are the same as those of the seventh embodiment.
With such an arrangement, several bearing rings can be polished together in the inner ring polishing process in consideration of the polishing speed and the efficiency of the ring polishing process, thereby increasing the efficiency of the ring polishing process.
The specific implementation method nine: the present embodiment will be described with reference to fig. 3 to 4, and the present embodiment further limits the number of the upper and lower semi-annular jigs described in the seventh embodiment, and in the present embodiment, the value of N is in the range of 1 to 5. The other components and the connection mode are the same as those of the eighth embodiment.
The present invention is not limited to the above embodiments, and any person skilled in the art can make many modifications and equivalent variations by using the above-described structures and technical contents without departing from the scope of the present invention.
Claims (7)
1. A method for polishing the inner and outer surfaces of a bearing ring by using a rotational flow tumbling process is characterized in that: the method is realized by the following steps:
the method comprises the following steps: selecting equipment: the model of the selected rotational flow rolling finishing machine is BJG-X600B free grinding tool finishing equipment;
step two: selecting an abrasive: selecting a brown corundum abrasive material with the abrasive size specification of 2-4 mm, and injecting the brown corundum abrasive material into a material box of a rotational flow tumbling and polishing machine;
step three: and (3) finishing the outer surface of the ferrule: clamping a ferrule in a ferrule outer surface finishing clamp (1), installing the ferrule outer surface finishing clamp (1) on a working spindle in a rotary flow roller finishing machine, driving the ferrule outer surface finishing clamp (1) to enter a material box under the drive of the axial motion of the working spindle, ensuring that the ferrule outer surface finishing clamp (1) is completely immersed in abrasive materials, starting to grind the outer surface of the ferrule for two times, controlling the working spindle to drive the ferrule outer surface finishing clamp (1) to rotate forwards for the first grinding, driving the abrasive materials to rotate backwards by the material box to fully grind the abrasive materials and the ferrule outer surface, controlling the working spindle to drive the ferrule outer surface finishing clamp (1) to rotate backwards for the second grinding, driving the abrasive materials to rotate forwards by the material box to continuously fully grind the abrasive materials and the ferrule outer surface, the grinding time is 10min-20min, after the second grinding is finished, the ferrule outer surface finishing fixture (1) leaves the work bin under the driving of the axial movement of the working spindle, and the ferrule with the finished outer surface is unloaded from the ferrule outer surface finishing fixture (1);
the outer surface finishing clamp (1) of the ferrule in the third step comprises a first clamping shaft (11), a first upper clamping cover (13), a first lower clamping cover (14) and two first locking nuts (12), wherein a clamping section, an upper thread section, a workpiece setting section and a lower thread section are sequentially arranged on the first clamping shaft (11), the first upper clamping cover (13) is sleeved on the upper thread section of the first clamping shaft (11), the first lower clamping cover (14) is sleeved on the lower thread section of the first clamping shaft (11), the first locking nut (12) is arranged at one end of the first upper clamping cover (13) far away from the workpiece setting section, the first locking nut (12) is sleeved on the upper thread section of the first clamping shaft (11), the other first locking nut (12) is arranged at one end of the first lower clamping cover (14) far away from the workpiece setting section, and the first locking nut (12) is sleeved on the lower thread section of the first clamping shaft (11), the two first locking nuts (12) are in threaded connection with the first clamping shaft (11), the polishing clamp (1) on the outer surface of the ferrule is installed on a working main shaft of a rotational flow roller polishing complete machine through a clamping section of the first clamping shaft (11), and the ferrule (3) is sleeved on a workpiece setting section of the first clamping shaft (11) and is clamped and fixed through a first upper clamping cover (13) and a first lower clamping cover (14);
step four: and (3) polishing the inner surface of the ferrule: clamping the ferrule with the finished outer surface in a ferrule inner surface finishing clamp (2), installing the ferrule inner surface finishing clamp (2) on a working spindle in a rotational flow roll finishing machine, driving the ferrule inner surface finishing clamp (2) to enter a material box under the axial movement of the working spindle, ensuring that the ferrule inner surface finishing clamp (2) is completely immersed in the abrasive material, starting to grind the inner surface of the ferrule for two times, controlling the working spindle to drive the ferrule inner surface finishing clamp (2) to rotate forwards for the first grinding, driving the abrasive material to rotate backwards by the material box, fully grinding the abrasive material and the ferrule outer surface, wherein the first grinding time is 5-15 min, carrying out second grinding after the first grinding is finished, controlling the working spindle to drive the ferrule inner surface finishing clamp (2) to rotate backwards for the second grinding, driving the abrasive material to rotate forwards by the material box, continuously and fully grinding the outer surface of the ferrule, the grinding time is 5min-15min, after the second grinding is finished, the ferrule inner surface finishing fixture (2) leaves the work bin under the driving of the axial movement of the working spindle, and the ferrule with the finished inner surface is unloaded from the ferrule inner surface finishing fixture (2);
the polishing clamp (2) for the inner surface of the ferrule in the fourth step comprises a second clamping shaft (21), a second upper clamping cover (23), a second lower clamping cover (24) and two second locking nuts (22), wherein the second clamping shaft (21) is sequentially provided with a clamping section, an upper threaded section, a smooth shaft section and a lower threaded section, the second upper clamping cover (23) is sleeved on the upper threaded section of the second clamping shaft (21), the second lower clamping cover (24) is sleeved on the lower threaded section of the second clamping shaft (21), the second upper clamping cover (23) and the second lower clamping cover (24) are oppositely arranged, one second locking nut (22) is arranged at one end of the second upper clamping cover (23) far away from the second lower clamping cover (24), the second locking nut (22) is sleeved on the upper threaded section of the second clamping shaft (21), and the other second locking nut (22) is arranged at one end of the second lower clamping cover (24) far away from the second upper clamping cover (23), a second locking nut (22) is sleeved on the lower thread section of the second clamping shaft (21), the two second locking nuts (22) are in threaded connection with the second clamping shaft (21), a polishing clamp (2) on the inner surface of the ferrule is installed on a working main shaft of a rotational flow roller polishing complete machine through the clamping section of the second clamping shaft (21), the ferrule (3) is arranged between the second upper clamping cover (23) and the second lower clamping cover (24) and is clamped and fixed through the second upper clamping cover (23) and the second lower clamping cover (24), and the axis of the ferrule (3) is perpendicular to the axis of the second clamping shaft (21);
step five: and (4) carrying out quality inspection and acceptance on the bearing ring after the inner ring and the outer ring are finished.
2. The method of claim 1 for finishing the inner and outer surfaces of a bearing ring by a rotational flow tumbling process, wherein: in the third step, when the outer surface of the ferrule is ground for the first time, the rotating speed of the working spindle driving the polishing clamp (1) on the outer surface of the ferrule to rotate forward is 100-130 r/min, and the rotating speed of the material box driving the grinding materials to rotate backward is 50-80 r/min.
3. The method of claim 2 for finishing the inner and outer surfaces of the bearing ring by a rotational flow tumbling process, wherein: and in the third step, when the outer surface of the ferrule is ground for the second time, the rotating speed of the working main shaft driving the polishing clamp (1) on the outer surface of the ferrule to rotate reversely is 100-130 r/min, and the rotating speed of the material box driving the grinding materials to rotate forwardly is 50-80 r/min.
4. A method of finishing the inner and outer surfaces of a bearing ring using a rotational flow tumbling process as claimed in claim 3, wherein: in the fourth step, when the inner surface of the ferrule is ground for the first time, the rotating speed of the working main shaft driving the ferrule inner surface finishing clamp (2) to rotate forwards is 60-90 r/min, and the rotating speed of the material box driving the grinding materials to rotate backwards is 40-70 r/min.
5. The method of claim 4 for finishing the inner and outer surfaces of the bearing ring by a rotational flow tumbling process, wherein: in the fourth step, when the inner surface of the ferrule is ground for the second time, the rotating speed of the working spindle driving the polishing clamp (2) for the inner surface of the ferrule to rotate reversely is 60-90 r/min, and the rotating speed of the bin driving the grinding materials to rotate forwardly is 40-70 r/min.
6. The method of claim 5 for finishing the inner and outer surfaces of the bearing ring by a rotational flow tumbling process, wherein: the second upper clamping cover (23) and the second lower clamping cover (24) have the same structure;
the second upper clamping cover (23) comprises an upper plate body and N upper semi-annular clamps, N is a positive integer, a through hole is processed in the center of the upper plate body, the upper thread section of the second clamping shaft (21) is arranged in the through hole of the upper plate body, the N upper semi-annular clamps are equidistantly arranged on the lower surface of the upper plate body along the length direction of the upper plate body, and the arc top of each upper semi-annular clamp is fixedly connected with the lower surface of the upper plate body;
the second lower clamping cover (24) comprises a lower plate body and N lower semi-annular clamps, N is a positive integer, a through hole is machined in the center of the lower plate body, the lower thread section of the second clamping shaft (21) is arranged in the through hole of the lower plate body, the N lower semi-annular clamps are arranged on the upper surface of the lower plate body at equal intervals along the length direction of the lower plate body, each lower semi-annular clamp corresponds to one upper semi-annular clamp, and the arc top of each lower semi-annular clamp is fixedly connected with the upper surface of the lower plate body;
one side of the second upper clamping cover (23) provided with the upper semi-annular clamp is opposite to one side of the second lower clamping cover (24) provided with the lower semi-annular clamp.
7. The method of claim 6 for finishing the inner and outer surfaces of the bearing ring by a rotational flow barreling process, wherein: the value range of N is 1-5.
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| CN115213803B (en) * | 2022-07-14 | 2024-02-27 | 大连理工大学 | Bearing ring outer raceway rotary dynamic pressure polishing device and working method thereof |
| CN115122223B (en) * | 2022-09-01 | 2023-02-03 | 太原理工大学 | Rotary polishing and grinding floating tool for machining surfaces of ferrule parts |
| CN117863065B (en) * | 2024-03-11 | 2024-05-10 | 太原理工大学 | Distributed polishing and grinding device and method for aero-engine bearing ring |
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| US7217173B1 (en) * | 2006-07-06 | 2007-05-15 | National Central University | Apparatus micro lapping with abrasive for polishing precision screw and polishing method thereof |
| TW201235152A (en) * | 2011-02-25 | 2012-09-01 | Ching-Chung Chen | Dry type nano-grinder |
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