CN111037371A - Method for processing locking notch of outer ring of angular contact ball bearing - Google Patents
Method for processing locking notch of outer ring of angular contact ball bearing Download PDFInfo
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- CN111037371A CN111037371A CN201911305097.6A CN201911305097A CN111037371A CN 111037371 A CN111037371 A CN 111037371A CN 201911305097 A CN201911305097 A CN 201911305097A CN 111037371 A CN111037371 A CN 111037371A
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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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/64—Special methods of manufacture
Abstract
A method for processing an outer ring locking notch of an angular contact ball bearing relates to a method for processing an outer ring locking notch of an angular contact ball bearing. The method aims to solve the problem that the height of a bearing locking notch obtained by an angular contact ball bearing locking notch processing method is reduced. The method comprises the following steps: 1. roughly grinding the end face of the bearing outer ring and demagnetizing; 2. roughly grinding the outer diameter, the inner diameter, the channel and the slope; 3. and (3) supplementary tempering: 4. performing rough polishing; 5. finishing grinding the end face, the inner diameter, the outer diameter and the channel, and then performing finish polishing, acid washing and dehydrogenation; 6. roughly grinding a channel, and then finely grinding; 7. finally grinding the slope; 8. removing acute angle, detecting flaw, grinding external diameter, demagnetizing and cleaning. The method improves the processing precision, quality and processing efficiency of the locking notch, fundamentally solves the problems of ball falling and sleeve scattering after assembling and sleeve fitting, and reduces the waste loss of the steel balls. The invention is suitable for processing the bearing locking notch.
Description
Technical Field
The invention relates to a method for processing an outer ring locking notch of an angular contact ball bearing.
Background
With the rapid development of the aviation field, various performance requirements of the aeroengine bearing are continuously improved, and particularly, various requirements of the angular contact ball bearing such as the groove position, the contact angle, the assembly locking notch and the like are improved. Normally, a proper assembly locking notch is required on a channel on a ring (an inner ring and an outer ring) of the angular contact ball bearing. The locking amount is overlarge due to the overlarge height of the locking port, and the steel ball is rubbed during assembly to cause the steel ball to be damaged; if the height of the locking notch is too small, the locking amount is too small, and the locking notch can be loose after assembly. According to the existing processing technique, the finished product of the angular contact ball bearing has low matching rate and is accompanied with the phenomenon of ball falling or sleeve scattering, so that the use requirement of a user cannot be met. FIG. 1 is a schematic structural diagram of an outer race of a conventional bearing; the height of the locking notch in fig. 1 refers to the relative height between the bottom of the channel and the locking point.
The existing angular contact ball bearing locking notch processing method comprises the following steps: equal rough grinding plane → demagnetization → rough grinding outer diameter → inner diameter of outer ring of rough grinding → rough grinding channel → rough grinding slope → supplementary tempering → rough finishing → finish grinding plane → finish grinding outer diameter → finish grinding channel → acid washing → dehydrogenation → inner diameter of outer ring of finish grinding → finishing channel → finish grinding slope → sharp corner removal → flaw detection → finishing channel → finishing outer diameter → laser typing → demagnetization, cleaning and submitting. According to the method, a slope final grinding process is placed before a groove lapping process, the sizes of locking notches after the slope is finally ground are the sizes of final finished products, and the size of a locking point of a part is easily out of tolerance when the groove is finely ground after the slope is finally ground. Meanwhile, when the groove is finely ground, due to the fact that the fine grinding equipment is different, operators are different and the like, the slope locking point can generate inclination angles and blunt locking phenomena, fig. 2 is a schematic view of a locking port machined by the existing method, it can be obviously seen in fig. 2 that the locking point rounding phenomenon of the locking port formed by the slope and the groove is obvious, the locking point rounding enables the height of the locking port to be reduced, and part of products are subjected to ball dropping or sleeve scattering in the assembling and sleeving process.
Disclosure of Invention
The invention provides a method for processing an outer ring locking notch of an angular contact ball bearing, aiming at solving the problem that the height of the bearing locking notch obtained by the existing method for processing the outer ring locking notch of the angular contact ball bearing is reduced.
The processing method of the angular contact ball bearing outer ring locking notch is carried out according to the following steps:
(1) roughly grinding two end faces of the bearing outer ring, and then demagnetizing;
(2) roughly grinding the outer diameter, the inner diameter and the channel of the bearing outer ring obtained by the treatment in the step (1), and roughly grinding the slope until the height of a locking notch reaches the design size; the height of the locking notch is the height difference between a locking point on the slope and the bottom of the channel;
(3) and (3) carrying out supplementary tempering on the bearing outer ring obtained by the treatment in the step (2): the temperature of the supplementary tempering is 130-140 ℃;
(4) performing rough finishing on the bearing outer ring obtained by the treatment in the step (3);
(5) finishing two end surfaces, the outer diameter and a channel of the bearing outer ring obtained by the step (4), then performing finish polishing, acid washing and dehydrogenation in sequence, and finally performing inner diameter finishing grinding;
(6) roughly grinding the channel of the bearing outer ring obtained in the step (5), and then finely grinding;
(7) the slope of the bearing outer ring obtained by the final grinding step (6) reaches the design size until the height of the locking notch reaches the design size; the height of the locking notch is the height difference between a locking point on the slope and the bottom of the channel;
(8) and (5) sequentially carrying out acute angle removal, flaw detection, outer diameter grinding, demagnetization and cleaning on the bearing outer ring obtained by the treatment in the step (7), thus completing the process.
The principle and the beneficial effects of the invention are as follows:
1. according to the invention, the rough grinding channel and the lapping channel are continuously processed, and the final grinding slope procedure is placed after the lapping channel procedure, so that the size change of a lock point caused by different lapping equipment, different operators, different channel customization sizes, different lapping channel removal amounts and the like every time is avoided, the processing precision and quality of a lock opening are improved, the phenomena of ball dropping and sleeve scattering after assembly and sleeve fitting are fundamentally solved, and the waste loss of steel balls is reduced.
2. According to the invention, the rough grinding channel and the fine grinding channel are continuously carried out, and the original two-time clamping is changed into one-time clamping, so that the processing efficiency is improved, and the labor intensity of an operator is reduced.
3. In the prior art, a groove is roughly ground, a slope is finally ground, and the height of a locking notch after the slope is finally ground is set as a final size, but the groove is required to be finely ground in order to remove grinding machining marks after the slope is finally ground, so that the size of a locking point is out of tolerance. According to the invention, the finely ground channel is placed before the slope is finally ground, the size of the channel after the slope is finally ground is the size of the final machining, and no machining is required, so that the height of the locking notch can be ensured.
Drawings
FIG. 1 is a schematic structural diagram of an outer race of a conventional bearing;
FIG. 2 is a schematic view of a locking notch of an outer ring of a bearing machined by a conventional method;
FIG. 3 is a schematic view of a locking notch of an outer ring of a bearing processed according to embodiment 1.
The specific implementation mode is as follows:
the technical scheme of the invention is not limited to the specific embodiments listed below, and any reasonable combination of the specific embodiments is included.
The first embodiment is as follows: the method for processing the locking notch of the outer ring of the angular contact ball bearing comprises the following steps:
(1) roughly grinding two end faces of the bearing outer ring, and then demagnetizing;
(2) roughly grinding the outer diameter, the inner diameter and the channel of the bearing outer ring obtained by the treatment in the step (1), and roughly grinding the slope until the height of a locking notch reaches the design size; the height of the locking notch is the height difference between a locking point on the slope and the bottom of the channel;
(3) and (3) carrying out supplementary tempering on the bearing outer ring obtained by the treatment in the step (2): the temperature of the supplementary tempering is 130-140 ℃;
(4) performing rough finishing on the bearing outer ring obtained by the treatment in the step (3);
(5) finishing two end surfaces, the outer diameter and a channel of the bearing outer ring obtained by the step (4), then performing finish polishing, acid washing and dehydrogenation in sequence, and finally performing inner diameter finishing grinding;
(6) roughly grinding the channel of the bearing outer ring obtained in the step (5), and then finely grinding;
(7) the slope of the bearing outer ring obtained by the final grinding step (6) reaches the design size until the height of the locking notch reaches the design size; the height of the locking notch is the height difference between a locking point on the slope and the bottom of the channel;
(8) and (5) sequentially carrying out acute angle removal, flaw detection, outer diameter grinding, demagnetization and cleaning on the bearing outer ring obtained by the treatment in the step (7), thus completing the process.
1. According to the embodiment, the rough grinding channel and the fine grinding channel are continuously machined, and the final grinding slope procedure is placed after the fine grinding channel procedure, so that the size change of a lock point caused by different fine grinding equipment, different operators, different channel customization sizes, different fine grinding channel removal amounts and the like at each time is avoided, the machining precision and quality of a lock opening are improved, the phenomena of ball falling and sleeve scattering after assembly and sleeve fitting are fundamentally solved, and the waste loss of steel balls is reduced.
2. According to the embodiment, the rough grinding channel and the fine grinding channel are continuously carried out, the original two-time clamping is changed into one-time clamping, the processing efficiency is improved, and the labor intensity of operators is reduced.
3. In the prior art, a groove is roughly ground, a slope is finally ground, and the height of a locking notch after the slope is finally ground is set as a final size, but the groove is required to be finely ground in order to remove grinding machining marks after the slope is finally ground, so that the size of a locking point is out of tolerance. In the embodiment, the finely ground channel is placed before the slope is finally ground, the size of the channel after the slope is finally ground is the size of the final machined channel, and no machining is needed, so that the embodiment can ensure the height of the locking notch.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: the rough grinding in the step (1) comprises the following processing parameters: the allowance is 0.06-0.08 mm, the rotating speed of the grinding wheel is 1000-1500 r/min, the rotating speed of the magnetic table is 13-18 r/min, the granularity of the grinding wheel is 46#, and the vertical feeding speed of the grinding wheel is 20-30 mu m/r. Other steps and parameters are the same as in the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the processing parameters of the outer diameter rough grinding in the step (2) are as follows: the allowance is 0.06-0.08 mm, the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 1000-1500 r/min, the rotating speed of the guide wheel is 50-60 r/min, the angle of the guide wheel is 1-45', the grinding depth of the step I is 50-60 mu m, the grinding depth of the step II is 40-50 mu m, the grinding depth of the step III is 30-40 mu m, and the grinding depth of the step IV is 20-30 mu m. Other steps and parameters are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: the processing parameters of the rough grinding of the inner diameter in the step (2) are as follows: the allowance is 0.06-0.08 mm, the grinding wheel granularity is 80#, the grinding wheel rotating speed is 11000-13000 r/min, the workpiece rotating speed is 200-210 r/min, the feeding amount is 200-300 mu m, the feeding speed I is 5-7 mu m/s, and the feeding speed II is 4-6 mu m/s. Other steps and parameters are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: the processing parameters of the rough grinding of the channel in the step (2) are as follows: the allowance is 0.06-0.09 mm, the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 7000-7100 r/min, the rotating speed of the workpiece is 200-210 r/min, and the feeding amount is 200-300 mu m; the feeding speed I is 3-6 μm/s, and the feeding speed II is 2-4 μm/s. Other steps and parameters are the same as in one of the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is: the processing parameters of the slope rough grinding in the step (2) are as follows: the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 11000-13000 r/min, the rotating speed of the workpiece is 150-240 r/min, the feed rate is 200-300 mu m, the feed speed I is 3-6 mu m/s, and the feed speed II is 2-4 mu m/s. Other steps and parameters are the same as in one of the first to fifth embodiments.
The seventh embodiment: the difference between this embodiment and one of the first to sixth embodiments is:
the processing parameters of the outer diameter final grinding in the step (5) are as follows: the allowance is 0.01-0.015 mm, the rotating speed of a grinding wheel is 1000-1500 r/min, the rotating speed of a guide wheel is 30-40 r/min, the angle of the guide wheel is 1-45', the grinding depth of the step I is 30-40 mu m, the grinding depth of the step II is 15-20 mu m, and the grinding depth of the step III is 5-10 mu m.
The machining parameters of the inner diameter final grinding in the step (5) are as follows: and finally grinding to a designed size, wherein the rotating speed of the grinding wheel is 21000-24000 r/min, the rotating speed of the workpiece is 100-200 r/min, the feed amount is 100-200 mm, the feed speed I is 4-6 mu m/s, the feed speed II is 3-5 mu m/s, and the granularity of the grinding wheel is 120 #. Other steps and parameters are the same as in one of the first to sixth embodiments.
The specific implementation mode is eight: the present embodiment differs from one of the first to seventh embodiments in that: and (5) the machining parameters of the channel finish grinding are as follows: the allowance is 0.005-0.01, the grinding wheel granularity is 120#, the grinding wheel rotating speed is 12000-18000 r/min, the workpiece rotating speed is 200-400 r/min, the feeding amount is 0.05-0.08 mu m, the feeding speed I is 2-4 mu m/s, and the feeding speed II is 1-2 mu m/s. Other steps and parameters are the same as in one of the first to seventh embodiments.
The specific implementation method nine: the eighth embodiment is different from the eighth embodiment in that: and (5) the machining parameters of the final grinding of the two end faces are as follows: and finally grinding the two end faces to a designed size, wherein the rotating speed I of the grinding wheel is 15-65 r/min, the rotating speed II of the grinding wheel is 15-65 r/min, the rotating speed of the turntable is 8-32 r/min, and the pressure is 100-400 daN. The other steps and parameters are the same as in embodiment eight.
The detailed implementation mode is ten: the present embodiment differs from one of the first to ninth embodiments in that: the processing parameters of the fine grinding in the step (8) are as follows: finely grinding to a designed size, wherein the swing frequency of the station I is 900-1200 Hz, the rotating speed of a main shaft is 150-300 r/min, the pressure of an oilstone is 1.5-2 MPa, and the time is 10-15 s; the swing frequency of the station II is 600-900 Hz, the rotating speed of the main shaft is 300-500 r/min, the pressure of the oilstone is 1.5-2 MPa, and the time is 6-10 s;
the processing parameters of the slope final grinding in the step (7) are as follows: final grinding to a designed size, wherein the rotating speed of a grinding wheel is 21000-24000 r/min, the rotating speed of a workpiece is 100-200 r/min, the feeding amount is 100-200 mm, the feeding speed I is 4-6 mu m/s, the feeding speed II is 3-5 mu m/s, and the granularity of the grinding wheel is 120 #;
the processing parameters for grinding the outer diameter in the step (8) are as follows: grinding to a designed size, wherein the rotating speed of the grinding wheel is 1000-1500 r/min, the rotating speed of the guide wheel is 30-40 r/min, the angle of the guide wheel is 1-30-1-45', the grinding depth of the step I is 5-6 mu m, the grinding depth of the step II is 4-5 mu m, and the grinding depth of the step III is 3-4 mu m. Other steps and parameters are the same as in one of the first to ninth embodiments.
The following examples were used to demonstrate the beneficial effects of the present invention:
example 1:
in the embodiment, the method for processing the locking notch of the outer ring of the angular contact ball bearing in the embodiment is described with reference to fig. 1 to 3, and comprises the following steps:
(1) roughly grinding two end faces of the bearing outer ring, and then demagnetizing;
the rough grinding parameters are as follows: the allowance is 0.06mm, the rotating speed of the grinding wheel is 1100r/min, the rotating speed of the magnetic table is 14r/min, the granularity of the grinding wheel is 46#, and the vertical feeding speed of the grinding wheel is 21 mu m/r;
(2) roughly grinding the outer diameter, the inner diameter and the channel of the bearing outer ring obtained by the treatment in the step (1), and roughly grinding the slope until the height of a locking notch reaches the design size;
the processing parameters of the outer diameter rough grinding are as follows: the allowance is 0.06mm, the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 1100r/min, the rotating speed of the guide wheel is 55r/min, the angle of the guide wheel is 1 degree 30', the grinding depth of the step I is 55 micrometers, the grinding depth of the step II is 42 micrometers, the grinding depth of the step III is 32 micrometers, and the grinding depth of the step IV is 21 micrometers;
the processing parameters of the rough grinding of the inner diameter in the step (2) are as follows: the allowance is 0.06mm, the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 11000r/min, the rotating speed of a workpiece is 200r/min, the feed rate is 210 mu m, the feed speed I is 5 mu m/s, and the feed speed II is 5 mu m/s;
the processing parameters of the channel rough grinding are as follows: the allowance is 0.06mm, the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 7000r/min, the rotating speed of the workpiece is 200r/min, and the feed rate is 210 mu m; the feeding speed I is 4 mu m/s, and the feeding speed II is 3 mu m/s;
the processing parameters of the slope rough grinding are as follows: the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 12000r/min, the rotating speed of a workpiece is 160r/min, the feeding amount is 220 mu m, the feeding speed I is 4 mu m/s, and the feeding speed II is 3 mu m/s;
(3) and (3) carrying out supplementary tempering on the bearing outer ring obtained by the treatment in the step (2): the temperature of the supplementary tempering is 135 ℃;
(4) performing rough finishing on the bearing outer ring obtained by the treatment in the step (3); the rough polishing refers to removing burrs by using a polishing machine;
(5) finishing two end surfaces, the outer diameter and a channel of the bearing outer ring obtained by the step (4), then performing finish polishing, acid washing and dehydrogenation in sequence, and finally performing inner diameter finishing grinding; the plane is finally ground, so that the parallelism difference and the bending degree of the part can meet the requirements; the inner diameter of the part reaches the requirements of dimension precision and appearance quality required by the process after final grinding, the final grinding of the two end surfaces is carried out on a fine grinding machine, and the final grinding of the outer diameter is carried out on a centerless grinder; the fine polishing can remove burrs;
the processing parameters of the outer diameter final grinding are as follows: the allowance is 0.01mm, the rotating speed of the grinding wheel is 1100r/min, the rotating speed of the guide wheel is 35r/min, the angle of the guide wheel is 1 degree and 30 degrees, the grinding depth of the step I is 32 mu m, the grinding depth of the step II is 16 mu m, and the grinding depth of the step III is 6 mu m;
the processing parameters of the inner diameter final grinding are as follows: finally grinding to a designed size, wherein the rotating speed of a grinding wheel is 22000r/min, the rotating speed of a workpiece is 120r/min, the feeding amount is 110mm, the feeding speed I is 5 mu m/s, the feeding speed II is 4 mu m/s, and the granularity of the grinding wheel is 120 #;
the machining parameters of the channel finish grinding are as follows: the allowance is 0.006, the granularity of the grinding wheel is 120#, the rotating speed of the grinding wheel is 14000r/min, the rotating speed of the workpiece is 220r/min, the feed rate is 0.06 mu m, the feed speed I is 3 mu m/s, and the feed speed II is 1 mu m/s;
the machining parameters of the final grinding of the two end faces are as follows: the two end faces are finally ground to the designed size, the rotating speed I of the grinding wheel is 20r/min, the rotating speed II of the grinding wheel is 20r/min, the rotating speed of the turntable is 10r/min, and the pressure is 150 daN;
(6) roughly grinding the channel of the bearing outer ring obtained in the step (5), and then finely grinding; the rough grinding and the fine grinding of the channel are carried out on a fine grinding machine, so that grinding traces can be removed, and the surface roughness, the appearance quality and the precision required by the process can be achieved;
(7) the slope of the bearing outer ring obtained by the final grinding step (6) reaches the design size until the height of the locking notch reaches the design size; the final grinding is carried out on channel grinding equipment, and the size precision and the appearance quality of the part can meet the process requirements.
The processing parameters of the slope final grinding are as follows: final grinding to a designed size, wherein the rotating speed of a grinding wheel is 21000r/min, the rotating speed of a workpiece is 120r/min, the feeding amount is 120mm, the feeding speed I is 5 mu m/s, the feeding speed II is 4 mu m/s, and the granularity of the grinding wheel is 120 #;
(8) and (5) sequentially carrying out acute angle removal, flaw detection, outer diameter grinding, demagnetization and cleaning on the bearing outer ring obtained by the treatment in the step (7), thus completing the process. Acute angle removal of the part can remove an acute angle formed by the slope and the end face, flaw detection is used for detecting grinding cracks, and grinding outer diameter can remove supporting traces and ensure appearance quality;
the processing parameters of the fine grinding are as follows: finely grinding to a designed size, wherein the swing frequency of a station I is 900Hz, the rotating speed of a main shaft is 160r/min, the pressure of an oilstone is 2MPa, and the time is 10 s; the swing frequency of the station II is 600Hz, the rotating speed of the main shaft is 500r/min, the pressure of the oilstone is 2MPa, and the time is 8 s;
the processing parameters of the coping outer diameter are as follows: grinding to a designed size, wherein the rotating speed of the grinding wheel is 1100r/min, the rotating speed of the guide wheel is 35r/min, the angle of the guide wheel is 1 degree and 30 degrees, the grinding depth of the step I is 5 micrometers, the grinding depth of the step II is 4 micrometers, and the grinding depth of the step III is 3 micrometers.
The beneficial effects of the embodiment are that:
1. according to the embodiment, the rough grinding channel and the fine grinding channel are continuously processed, the final grinding slope process is placed after the fine grinding channel process, the size change of a lock point caused by different fine grinding devices, different operators, different channel customization sizes, different fine grinding channel removal amounts and the like at each time is avoided, the processing precision and quality of a lock opening are improved, the phenomena of ball falling and sleeve scattering after assembly and sleeve fitting are fundamentally solved, and the waste loss of steel balls is reduced.
2. In the embodiment, the rough grinding channel and the fine grinding channel are continuously carried out, the original two-time clamping is changed into one-time clamping, the processing efficiency is improved, and the labor intensity of operators is reduced.
3. In the prior art, a groove is roughly ground, a slope is finally ground, and the height of a locking notch after the slope is finally ground is set as a final size, but the groove is required to be finely ground in order to remove grinding machining marks after the slope is finally ground, so that the size of a locking point is out of tolerance. In the embodiment, the finely ground channel is placed before the slope is finally ground, the size of the channel after the slope is finally ground is the size of the final machining, and no machining is needed, so that the height of the locking notch can be ensured.
Claims (10)
1. A method for processing an outer ring locking notch of an angular contact ball bearing is characterized by comprising the following steps: the method comprises the following steps:
(1) roughly grinding two end faces of the bearing outer ring, and then demagnetizing;
(2) roughly grinding the outer diameter, the inner diameter and the channel of the bearing outer ring obtained by the treatment in the step (1), and roughly grinding the slope until the height of a locking notch reaches the design size; the height of the locking notch is the height difference between a locking point on the slope and the bottom of the channel;
(3) and (3) carrying out supplementary tempering on the bearing outer ring obtained by the treatment in the step (2): the temperature of the supplementary tempering is 130-140 ℃;
(4) performing rough finishing on the bearing outer ring obtained by the treatment in the step (3);
(5) finishing two end surfaces, the outer diameter and a channel of the bearing outer ring obtained by the step (4), then performing finish polishing, acid washing and dehydrogenation in sequence, and finally performing inner diameter finishing grinding;
(6) roughly grinding the channel of the bearing outer ring obtained in the step (5), and then finely grinding;
(7) the slope of the bearing outer ring obtained by the final grinding step (6) reaches the design size until the height of the locking notch reaches the design size; the height of the locking notch is the height difference between a locking point on the slope and the bottom of the channel;
(8) and (5) sequentially carrying out acute angle removal, flaw detection, outer diameter grinding, demagnetization and cleaning on the bearing outer ring obtained by the treatment in the step (7), thus completing the process.
2. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that: the rough grinding in the step (1) comprises the following processing parameters: the allowance is 0.06-0.08 mm, the rotating speed of the grinding wheel is 1000-1500 r/min, the rotating speed of the magnetic table is 13-18 r/min, the granularity of the grinding wheel is 46#, and the vertical feeding speed of the grinding wheel is 20-30 mu m/r.
3. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that: the processing parameters of the outer diameter rough grinding in the step (2) are as follows: the allowance is 0.06-0.08 mm, the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 1000-1500 r/min, the rotating speed of the guide wheel is 50-60 r/min, the angle of the guide wheel is 1-45', the grinding depth of the step I is 50-60 mu m, the grinding depth of the step II is 40-50 mu m, the grinding depth of the step III is 30-40 mu m, and the grinding depth of the step IV is 20-30 mu m.
4. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that: the processing parameters of the rough grinding of the inner diameter in the step (2) are as follows: the allowance is 0.06-0.08 mm, the grinding wheel granularity is 80#, the grinding wheel rotating speed is 11000-13000 r/min, the workpiece rotating speed is 200-210 r/min, the feeding amount is 200-300 mu m, the feeding speed I is 5-7 mu m/s, and the feeding speed II is 4-6 mu m/s.
5. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that: the processing parameters of the rough grinding of the channel in the step (2) are as follows: the allowance is 0.06-0.09 mm, the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 7000-7100 r/min, the rotating speed of the workpiece is 200-210 r/min, and the feeding amount is 200-300 mu m; the feeding speed I is 3-6 μm/s, and the feeding speed II is 2-4 μm/s.
6. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that: the processing parameters of the slope rough grinding in the step (2) are as follows: the granularity of the grinding wheel is 80#, the rotating speed of the grinding wheel is 11000-13000 r/min, the rotating speed of the workpiece is 150-240 r/min, the feed rate is 200-300 mu m, the feed speed I is 3-6 mu m/s, and the feed speed II is 2-4 mu m/s.
7. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that:
the processing parameters of the outer diameter final grinding in the step (5) are as follows: the allowance is 0.01-0.015 mm, the rotating speed of a grinding wheel is 1000-1500 r/min, the rotating speed of a guide wheel is 30-40 r/min, the angle of the guide wheel is 1-1 DEG 30 '-1 DEG 45', the grinding depth of the step I is 30-40 mu m, the grinding depth of the step II is 15-20 mu m, and the grinding depth of the step III is 5-10 mu m;
the machining parameters of the inner diameter final grinding in the step (5) are as follows: and finally grinding to a designed size, wherein the rotating speed of the grinding wheel is 21000-24000 r/min, the rotating speed of the workpiece is 100-200 r/min, the feed amount is 100-200 mm, the feed speed I is 4-6 mu m/s, the feed speed II is 3-5 mu m/s, and the granularity of the grinding wheel is 120 #.
8. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that: and (5) the machining parameters of the channel finish grinding are as follows: the allowance is 0.005-0.01, the grinding wheel granularity is 120#, the grinding wheel rotating speed is 12000-18000 r/min, the workpiece rotating speed is 200-400 r/min, the feeding amount is 0.05-0.08 mu m, the feeding speed I is 2-4 mu m/s, and the feeding speed II is 1-2 mu m/s.
9. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that: and (5) the machining parameters of the final grinding of the two end faces are as follows: and finally grinding the two end faces to a designed size, wherein the rotating speed I of the grinding wheel is 15-65 r/min, the rotating speed II of the grinding wheel is 15-65 r/min, the rotating speed of the turntable is 8-32 r/min, and the pressure is 100-400 daN.
10. The angular contact ball bearing locking notch machining method according to claim 1, characterized in that:
the processing parameters of the fine grinding in the step (8) are as follows: finely grinding to a designed size, wherein the swing frequency of the station I is 900-1200 Hz, the rotating speed of a main shaft is 150-300 r/min, the pressure of an oilstone is 1.5-2 MPa, and the time is 10-15 s; the swing frequency of the station II is 600-900 Hz, the rotating speed of the main shaft is 300-500 r/min, the pressure of the oilstone is 1.5-2 MPa, and the time is 6-10 s;
the processing parameters for grinding the outer diameter in the step (8) are as follows: grinding to a designed size, wherein the rotating speed of a grinding wheel is 1000-1500 r/min, the rotating speed of a guide wheel is 30-40 r/min, the angle of the guide wheel is 1-30-1-45 degrees, the grinding depth of the step I is 5-6 mu m, the grinding depth of the step II is 4-5 mu m, and the grinding depth of the step III is 3-4 mu m;
the processing parameters of the slope final grinding in the step (7) are as follows: and finally grinding to a designed size, wherein the rotating speed of the grinding wheel is 21000-24000 r/min, the rotating speed of the workpiece is 100-200 r/min, the feed amount is 100-200 mm, the feed speed I is 4-6 mu m/s, the feed speed II is 3-5 mu m/s, and the granularity of the grinding wheel is 120 #.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112692522A (en) * | 2020-12-23 | 2021-04-23 | 中国航发哈尔滨轴承有限公司 | Deep groove ball inner ring ball mounting gap processing method |
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Application publication date: 20200421 |