CN114535940B - Processing method of short cylindrical roller bearing retainer with positioning flange on outer ring - Google Patents
Processing method of short cylindrical roller bearing retainer with positioning flange on outer ring Download PDFInfo
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- CN114535940B CN114535940B CN202210295990.0A CN202210295990A CN114535940B CN 114535940 B CN114535940 B CN 114535940B CN 202210295990 A CN202210295990 A CN 202210295990A CN 114535940 B CN114535940 B CN 114535940B
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- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 51
- 238000003801 milling Methods 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 33
- 210000000078 claw Anatomy 0.000 claims abstract description 32
- 238000007514 turning Methods 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000005488 sandblasting Methods 0.000 claims abstract description 14
- 238000007689 inspection Methods 0.000 claims abstract description 9
- 238000005468 ion implantation Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 238000007747 plating Methods 0.000 claims abstract description 5
- 229910052709 silver Inorganic materials 0.000 claims abstract description 5
- 239000004332 silver Substances 0.000 claims abstract description 5
- 238000005496 tempering Methods 0.000 claims abstract description 5
- 238000003754 machining Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 15
- 230000033001 locomotion Effects 0.000 claims description 12
- 239000006004 Quartz sand Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 229910052715 tantalum Inorganic materials 0.000 claims description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a processing method of a short cylindrical roller bearing retainer with a positioning flange on an outer ring, and relates to a processing method of a roller bearing retainer. The invention aims to solve the problems that the appearance quality is unstable and the precision is affected in the existing processing method. The method comprises the following steps: cutting, rough turning of an inner circle and a first plane and chamfering, rough turning of an outer circle and a second plane and chamfering, tempering, fine turning of the inner circle and the first plane and chamfering, fine turning of the outer circle and the second plane and chamfering, marking, grinding of both planes, drilling and milling of square pockets, slotting of four corners R of the pockets, grinding of square pockets, final grinding of the outer circle, final turning of the inner circle and chamfering, turning of an inner groove, turning of an outer step, deburring, milling of an outer step claw, deburring, sand blasting, splitting of the claw, flaw detection, cleaning, final inspection, pocket and guide surface ion implantation (the guide surface is the inner diameter in the text), silver plating, packaging and submitting. The invention is used for processing the short cylindrical roller bearing retainer with the positioning flange on the outer ring.
Description
Technical Field
The invention relates to a processing method of a roller bearing retainer.
Background
The cylindrical roller bearing is widely applied to the fields of aerospace, medium-large electric motors, internal combustion engines, gas turbines and the like. The cylindrical rollers are in line contact with the roller path, and the radial load capacity is high. The novel high-speed rotating type bearing is suitable for bearing heavy load and impact load, is also suitable for high-speed rotation, has small friction coefficient, can separate an inner ring or an outer ring, and is convenient to install and detach.
The cylindrical roller bearing retainer is characterized in that pocket four corners R are smaller, broaching is adopted in the original machining method, the broaching is frequently replaced due to the fact that the smaller pocket four corners R are worn faster, the broaching belongs to a complex multi-tooth machining tool, manufacturing is complex, machining cost is 10 times higher than that of a common tool, and appearance quality disqualification phenomenon is frequently caused in the pocket four corners R in broaching, for example: the four corners R of the broach are broken and tough, and the surfaces of the four corners R of the pocket hole of the retainer are provided with quality problems such as lacerated wounds or meat lack; meanwhile, burrs and acute angles are usually formed on the outer surface and the pocket edge of the solid retainer after the machining is finished, manual removal is not complete, the defects remain in the subsequent machining process, and if the retainer is used for assembly, the rotation precision and the appearance quality of the bearing are affected; when broaching the pocket, if the broach is worn, obvious processing marks are generated, so that the appearance quality of the pocket is unstable and does not meet the appearance quality requirement, and the size dispersion difference and the pocket precision dispersion difference of the broach pocket are large
Disclosure of Invention
The invention aims to solve the problems that the existing processing method is unstable in appearance quality and affects accuracy, and provides a processing method of a short cylindrical roller bearing retainer with a positioning flange on an outer ring.
The invention relates to a processing method of a short cylindrical roller bearing retainer with a positioning flange on an outer ring, which comprises the following steps:
1. cutting the bar into sections;
2. roughly turning an inner circle and a first plane, and chamfering;
3. roughly turning an outer circle and a second plane, and chamfering;
4. tempering;
5. finely turning the inner circle and the first plane, and chamfering;
6. finely turning an outer circle and a second plane, and chamfering;
7. marking;
8. uniformly grinding the first plane and the second plane until the dimensional tolerance is controlled within 0.005mm, and controlling the plane parallel difference within 0.002 mm;
9. drilling and milling square pocket holes: before machining, measuring concentricity and axial runout of the inner positioning disk and a machine tool turntable by adopting a magnetic meter, and controlling the concentricity and the axial runout to be within 0.02 mm; drilling, rough milling and finish milling are sequentially carried out, and square pocket hole drilling and milling are completed; the process of drilling and milling square pocket holes gives the allowance of 0.05-0.08 mm to the subsequent grinding Fang Doukong process;
10. four corners of the slotting pocket: the slotting tool is clamped on a cutter bar at the lower part of the slotting machine ram, extends into a hole of a workpiece to do vertical reciprocating motion, and processes four corners of the pocket;
11. grinding square pocket holes: the retainer pocket is ground by adopting an insert grinding method, during grinding, a workpiece is fixed on a workbench capable of moving according to coordinate positioning, and a grinding wheel performs slow revolution through a planetary transmission mechanism besides high-speed rotation and can perform vertical feeding movement;
12. finish grinding the outer circle;
13. turning the inner circle and chamfering;
14. an inner groove is formed;
15. an outer step;
16. deburring until the surface is smooth and free of burrs;
17. milling an outer step claw by adopting a cutter for milling the outer step claw;
18. deburring until the surface is smooth and free of burrs;
19. sand blasting: suspending a retainer in a closed working chamber, uniformly rotating under the drive of a continuously variable motor, spraying 20-40 meshes of quartz sand from a nozzle under the action of 0.3-0.7 MPa of compressed air, and polishing the acute angle and burrs of the retainer into micro fillets by utilizing the impact force of the quartz sand in a negative pressure area, wherein the working time is 8-15 min;
20. splitting claw: after splitting the outer step claws to form outer locking points of pockets of the retainer, putting the outer step claws into finished rollers for inspection, wherein the rollers cannot fall out from the outer diameter direction, and the rollers are pushed to two sides of the pockets along the rolling direction and cannot be contacted with the locking claws; pressing the roller from the outer diameter direction, wherein the roller does not protrude out of the inner diameter of the retainer;
21. flaw detection;
22. cleaning the surface of a workpiece;
23. and (3) final inspection: detecting the machined retainer according to the drawing size and requirements;
24. pocket and guide surface ion implantation: firstly injecting nitrogen element, then injecting tantalum element to form a tantalum nitride layer with the thickness of 20-25 nm, and repeatedly injecting to obtain 6 tantalum nitride layers;
25. silver plating;
26. and (5) packaging.
The invention has the beneficial effects that:
the invention adopts a slotting method to process four corners R of the pocket. The slotting tool is simple to manufacture, and the processing cost of the tool is low; meanwhile, the grinding square pocket is adopted to replace broaching pocket processing, so that the pocket processing precision and pocket surface quality are improved; the invention can improve the processing level of the metal entity retainer of the aviation cylindrical roller bearing and the stability and consistency of the processing process, thereby prolonging the service life of the aviation bearing.
Drawings
FIG. 1 is a schematic structural view of a short cylindrical roller bearing cage with a positioning flange on an outer ring;
FIG. 2 is a cross-sectional view of a short cylindrical roller bearing cage with a locating flange on the outer race;
FIG. 3 is a schematic view of the structure of the outer step milling claw cutter;
FIG. 4 is an enlarged view of the portion I of FIG. 3;
in the figure, 1 is a guide surface, 2 is a first plane, 3 is an outer diameter, 4 is an outer step, 5 is an inner groove, 6 is pocket four corners, 7 is a square pocket, and 8 is a second plane.
Detailed Description
The first embodiment is as follows: the processing method of the short cylindrical roller bearing retainer with the positioning flange on the outer ring of the embodiment specifically comprises the following steps:
1. cutting the bar into sections;
2. roughly turning an inner circle and a first plane, and chamfering;
3. roughly turning an outer circle and a second plane, and chamfering;
4. tempering;
5. finely turning the inner circle and the first plane, and chamfering;
6. finely turning an outer circle and a second plane, and chamfering;
7. marking;
8. uniformly grinding the first plane and the second plane until the dimensional tolerance is controlled within 0.005mm, and controlling the plane parallel difference within 0.002 mm;
9. drilling and milling square pocket holes: before machining, measuring concentricity and axial runout of the inner positioning disk and a machine tool turntable by adopting a magnetic meter, and controlling the concentricity and the axial runout to be within 0.02 mm; drilling, rough milling and finish milling are sequentially carried out, and square pocket hole drilling and milling are completed; the process of drilling and milling square pocket holes gives the allowance of 0.05-0.08 mm to the subsequent grinding Fang Doukong process;
10. four corners of the slotting pocket: the slotting tool is clamped on a cutter bar at the lower part of the slotting machine ram, extends into a hole of a workpiece to do vertical reciprocating motion, and processes four corners of the pocket;
11. grinding square pocket holes: the retainer pocket is ground by adopting an insert grinding method, during grinding, a workpiece is fixed on a workbench capable of moving according to coordinate positioning, and a grinding wheel performs slow revolution through a planetary transmission mechanism besides high-speed rotation and can perform vertical feeding movement;
12. finish grinding the outer circle;
13. turning the inner circle and chamfering;
14. an inner groove is formed;
15. an outer step;
16. deburring until the surface is smooth and free of burrs;
17. milling an outer step claw by adopting a cutter for milling the outer step claw;
18. deburring until the surface is smooth and free of burrs;
19. sand blasting: suspending a retainer in a closed working chamber, uniformly rotating under the drive of a continuously variable motor, spraying 20-40 meshes of quartz sand from a nozzle under the action of 0.3-0.7 MPa of compressed air, and polishing the acute angle and burrs of the retainer into micro fillets by utilizing the impact force of the quartz sand in a negative pressure area, wherein the working time is 8-15 min;
20. splitting claw: after splitting the outer step claws to form outer locking points of pockets of the retainer, putting the outer step claws into finished rollers for inspection, wherein the rollers cannot fall out from the outer diameter direction, and the rollers are pushed to two sides of the pockets along the rolling direction and cannot be contacted with the locking claws; pressing the roller from the outer diameter direction, wherein the roller does not protrude out of the inner diameter of the retainer;
21. flaw detection;
22. cleaning the surface of a workpiece;
23. and (3) final inspection: detecting the machined retainer according to the drawing size and requirements;
24. pocket and guide surface ion implantation: firstly injecting nitrogen element, then injecting tantalum element to form a tantalum nitride layer with the thickness of 20-25 nm, and repeatedly injecting to obtain 6 tantalum nitride layers;
25. silver plating;
26. and (5) packaging.
The eleventh processing mode of the embodiment is to grind around the outline of the workpiece to be ground while the grinding wheel moves up and down rapidly, and is characterized in that the heat generated by adopting a larger cutting depth is smaller, and the requirement on the runout of the grinding wheel is lower, and the grinding effect is better.
The ion implantation of twenty-four steps in the embodiment can improve the surface performance of the metal material and improve the performances of corrosion resistance, wear resistance, lubrication and the like of the metal material.
In this embodiment, four corners R of the pocket are machined by a slotting method. The slotting tool is simple to manufacture, the cutter processing cost is lower, and the processing principle is as follows: the slotting tool makes a main motion of reciprocating linear motion relative to the workpiece, and the workpiece makes a machining mode of feeding motion. The working mode is as follows: the slotting tool is clamped on a cutter bar at the lower part of the slotting machine ram, can extend into a hole of a workpiece to do vertical reciprocating motion, is downwards in a working stroke, is upwards in a return stroke, and is arranged on a slotting machine workbench, and the workpiece is intermittently fed after each return stroke of the slotting tool.
In the embodiment, the grinding square pocket is adopted to replace broaching pocket processing, so that the purpose is to improve the pocket processing precision and pocket surface quality. When broaching the pocket, if broach wearing and tearing will produce obvious processing trace, lead to the appearance quality of pocket unstable, do not accord with appearance quality requirement, broach processing pocket size is scattered poor and pocket precision is scattered poor great, based on above-mentioned quality problems, consequently adopts the coordinate grinding machine to process the pocket and is better solution way. The coordinate grinder is provided with a precise coordinate positioning device and is used for grinding precise holes and forming surfaces with high requirements on grinding pitch precision.
The technological method of the embodiment adopts sand blasting to remove burrs and acute angles, the sand blasting is divided into dry sand blasting and wet sand blasting, the wet sand blasting is mainly used for oversized retainers, the working efficiency is low, slight machining marks exist after the wet sand blasting, the technology adopts dry sand blasting, the machined marks are hardly seen by the retainers after the dry sand blasting, and the working efficiency is high, and the technology is mainly used for medium and small-sized retainers.
Cage dry blasting principle: the retainer hung in a closed working chamber is driven by a stepless speed change motor to rotate at a constant speed, 20-40 meshes of quartz sand is sprayed out by a nozzle under the action of compressed air of 0.3-0.7 MPa, a rotating workpiece is positioned in a negative pressure area, the sharp angle and burrs of the retainer are polished into micro fillets by utilizing the impact force of the quartz sand, the working time is 8-15 min, and the time can be adjusted according to the sand blasting quality.
The method adopts the processing method of pocket holes and guide surface ion implantation, improves the hardness of the retainer, enhances the abrasion resistance and achieves the purpose of prolonging the service life of the retainer. The ion implantation has the advantages that the size, the precision, the surface roughness and the like of the retainer are not changed, the modified layer is formed by directly combining atoms or molecules on the surface of the material, the modified layer and the substrate material have no clear interface, the combination is firm, and the falling phenomenon does not exist.
The second embodiment is as follows: the first difference between this embodiment and the specific embodiment is that: the processing parameter of the second step is n=800-1000 r/min, and f=0.1-0.2 mm/r; the processing parameter n=800-1000 r/min and f=0.1-0.2 mm/r; step five, processing parameters n=900-1100 r/min, f=0.05-0.1 mm/r; and step six, processing parameters n=900-1100 r/min, and f=0.05-0.1 mm/r. The other is the same as in the first embodiment.
And a third specific embodiment: this embodiment differs from the first or second embodiment in that: the technological parameters of the uniform grinding in the step eight are 65r/min of the rotating speed of the upper grinding disc, 65r/min of the rotating speed of the lower grinding disc, 30r/min of the rotating speed of the middle grinding disc and 100-170 daN of pressure. The other embodiments are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: this embodiment differs from one of the first to third embodiments in that: the technical parameter of drilling in the step nine is 1400r/min, f=130 mm/min; the technological parameters of rough milling holes are 3500r/min and f160mm/min; the technological parameter of the finish milling hole is 4000r/min and f180mm/min. The other is the same as in one of the first to third embodiments.
Fifth embodiment: this embodiment differs from one to four embodiments in that: the machining parameters of the step ten are n=1000-1200 r/min and f=0.03-0.05 mm/r. The others are the same as in one to one fourth embodiments.
Specific embodiment six: this embodiment differs from one of the first to fifth embodiments in that: the technological parameters of the eleventh grinding wheel are n=2500-3000 r/min, and f=0.01-0.02 mm/r; the technological parameters of the twelve grinding wheels in the step are n=1500-1650r/min, f=0.02-0.04 mm/r, and the technological parameters of the twelve grinding wheels in the step are n=1100-1300 r/min, f=0.08-0.12 mm/r; the technological parameters of the fourteen steps are n=800-1000 r/min, and f=0.06-0.1 mm/r; the technological parameters of the fifteenth step are n=900-1300 r/min and f=0.08-0.13 mm/r. The other is the same as in one of the first to fifth embodiments.
Seventh embodiment: this embodiment differs from one to four embodiments in that: seventeenth step, the technological parameters are n=500-700 r/min, f=150-180 mm/min; the milling outer step claw cutter is an integrally formed hard alloy disc milling cutter, and the shape of the milling cutter is the same as that of the outer step claw of the retainer. The others are the same as in one to one fourth embodiments.
In the embodiment, because the retainer material is 40CrNiMoA, the retainer material is characterized by being sticky, being compact and having certain hardness, and being rapid in cutter abrasion, the integral hard alloy disc milling cutter has the advantages that the disc milling cutter is a multi-edge cutting cutter, the machined outer step claws are stable in size, the disc milling cutter is not easy to wear, the service life is long, chip removal is smooth, the cutter does not need to be replaced frequently, and meanwhile, the machining efficiency is improved.
The following examples are used to verify the benefits of the present invention:
embodiment one: the processing method of the short cylindrical roller bearing retainer with the positioning flange on the outer ring specifically comprises the following steps:
1. cutting the bar into sections;
2. roughly turning an inner circle and a first plane, and chamfering;
3. roughly turning an outer circle and a second plane, and chamfering;
4. tempering;
5. finely turning the inner circle and the first plane, and chamfering;
6. finely turning an outer circle and a second plane, and chamfering;
7. marking;
8. uniformly grinding the first plane and the second plane until the dimensional tolerance is controlled within 0.005mm, and controlling the plane parallel difference within 0.002 mm;
9. drilling and milling square pocket holes: before machining, measuring concentricity and axial runout of the inner positioning disk and a machine tool turntable by adopting a magnetic meter, and controlling the concentricity and the axial runout to be within 0.02 mm; drilling, rough milling and finish milling are sequentially carried out, and square pocket hole drilling and milling are completed; the process of drilling and milling square pocket holes gives the allowance of 0.05-0.08 mm to the subsequent grinding Fang Doukong process;
10. four corners of the slotting pocket: the slotting tool is clamped on a cutter bar at the lower part of the slotting machine ram, extends into a hole of a workpiece to do vertical reciprocating motion, and processes four corners of the pocket;
11. grinding square pocket holes: the retainer pocket is ground by adopting an insert grinding method, during grinding, a workpiece is fixed on a workbench capable of moving according to coordinate positioning, and a grinding wheel performs slow revolution through a planetary transmission mechanism besides high-speed rotation and can perform vertical feeding movement;
12. finish grinding the outer circle;
13. turning the inner circle and chamfering;
14. an inner groove is formed;
15. an outer step;
16. deburring until the surface is smooth and free of burrs;
17. milling an outer step claw by adopting a cutter for milling the outer step claw;
18. deburring until the surface is smooth and free of burrs;
19. sand blasting: suspending a retainer in a closed working chamber, uniformly rotating under the drive of a continuously variable motor, spraying 20-40 meshes of quartz sand from a nozzle under the action of 0.3-0.7 MPa of compressed air, and polishing the acute angle and burrs of the retainer into micro fillets by utilizing the impact force of the quartz sand in a negative pressure area, wherein the working time is 8-15 min;
20. splitting claw: after splitting the outer step claws to form outer locking points of pockets of the retainer, putting the outer step claws into finished rollers for inspection, wherein the rollers cannot fall out from the outer diameter direction, and the rollers are pushed to two sides of the pockets along the rolling direction and cannot be contacted with the locking claws; pressing the roller from the outer diameter direction, wherein the roller does not protrude out of the inner diameter of the retainer;
21. flaw detection;
22. cleaning the surface of a workpiece;
23. and (3) final inspection: detecting the machined retainer according to the drawing size and requirements;
24. pocket and guide surface ion implantation: firstly injecting nitrogen element, then injecting tantalum element to form a tantalum nitride layer with the thickness of 20-25 nm, and repeatedly injecting to obtain 6 tantalum nitride layers;
25. silver plating;
26. and (5) packaging.
The machining dimensions and the precision of this example are shown in table 1.
From the data, the dimensional dispersion of the pocket is controlled within 0.003mm, the axial position dispersion of the pocket is controlled within 0.007mm, the mutual dispersion of the pocket is controlled within 0.004mm, the inclination dispersion of the pocket on the end face is controlled within 0.002mm, the dispersion of the pocket is controlled within 0.011mm, the circumferential position dispersion of the pocket is controlled within 0.015mm, the vertical dispersion of the beam on the end face is controlled within 0.003mm, and the roughness dispersion of the pocket surface is controlled within 0.03 mu m.
Claims (7)
1. A processing method of a short cylindrical roller bearing retainer with a positioning flange on an outer ring is characterized by comprising the following steps of:
1. cutting the bar into sections;
2. roughly turning an inner circle and a first plane, and chamfering;
3. roughly turning an outer circle and a second plane, and chamfering;
4. tempering;
5. finely turning the inner circle and the first plane, and chamfering;
6. finely turning an outer circle and a second plane, and chamfering;
7. marking;
8. uniformly grinding the first plane and the second plane until the dimensional tolerance is controlled within 0.005mm, and controlling the plane parallel difference within 0.002 mm;
9. drilling and milling square pocket holes: before machining, measuring concentricity and axial runout of the inner positioning disk and a machine tool turntable by adopting a magnetic meter, and controlling the concentricity and the axial runout to be within 0.02 mm; drilling, rough milling and finish milling are sequentially carried out, and square pocket hole drilling and milling are completed; the allowance of the subsequent grinding Fang Doukong procedure is 0.05-0.08 mm in the procedure of drilling and milling square pockets;
10. four corners of the slotting pocket: the slotting tool is clamped on a cutter bar at the lower part of the slotting machine ram, extends into a hole of a workpiece to do vertical reciprocating motion, and processes four corners of the pocket;
11. grinding square pocket holes: the retainer pocket is ground by adopting an insert grinding method, during grinding, a workpiece is fixed on a workbench capable of moving according to coordinate positioning, and a grinding wheel performs slow revolution through a planetary transmission mechanism besides high-speed rotation and can perform vertical feeding movement;
12. finish grinding the outer circle;
13. turning the inner circle and chamfering;
14. an inner groove is formed;
15. an outer step;
16. deburring until the surface is smooth and free of burrs;
17. milling an outer step claw by adopting a cutter for milling the outer step claw;
18. deburring until the surface is smooth and free of burrs;
19. sand blasting: suspending a retainer in a closed working chamber, uniformly rotating under the drive of a continuously variable motor, spraying 20-40 meshes of quartz sand from a nozzle under the action of 0.3-0.7 MPa of compressed air, and polishing the acute angle and burrs of the retainer into micro fillets by utilizing the impact force of the quartz sand, wherein the working time is 8-15 min;
20. splitting claw: after splitting the outer step claws to form outer locking points of pockets of the retainer, putting the outer step claws into finished rollers for inspection, wherein the rollers cannot fall out from the outer diameter direction, and the rollers are pushed to two sides of the pockets along the rolling direction and cannot be contacted with the locking claws; pressing the roller from the outer diameter direction, wherein the roller does not protrude out of the inner diameter of the retainer;
21. flaw detection;
22. cleaning the surface of a workpiece;
23. and (3) final inspection: detecting the machined retainer according to the drawing size and requirements;
24. pocket and guide surface ion implantation: firstly, injecting nitrogen element, then, injecting tantalum element to form a tantalum nitride layer with the thickness of 20-25 nm, and repeatedly injecting to obtain 6 tantalum nitride layers;
25. silver plating;
26. and (5) packaging.
2. The method for machining the short cylindrical roller bearing retainer with the positioning flange on the outer ring, which is disclosed in claim 1, is characterized in that machining parameters of the second step are n=800-1000 r/min and f=0.1-0.2 mm/r; step three, processing parameters n=800-1000 r/min and f=0.1-0.2 mm/r; step five, processing parameters n=900-1100 r/min, and f=0.05-0.1 mm/r; and step six, processing parameters n=900-1100 r/min, and f=0.05-0.1 mm/r.
3. The method for machining the short cylindrical roller bearing retainer with the positioning flange on the outer ring, which is disclosed in claim 1, is characterized in that the technological parameters of uniform grinding in the step eight are 65r/min of the rotating speed of an upper grinding disc, 65r/min of the rotating speed of a lower grinding disc, 30r/min of the rotating speed of a middle disc and 100-170 dan of pressure.
4. The method for machining the short cylindrical roller bearing retainer with the positioning flange on the outer ring, which is characterized in that the technical parameters of drilling in the step nine are n=1400 r/min and f=130 mm/min; the technological parameters of rough milling holes are n=3500 r/min and f=160 mm/min; the process parameters for finish milling holes are n=4000 r/min and f=180 mm/min.
5. The method for machining the short cylindrical roller bearing retainer with the positioning flange on the outer ring, which is disclosed in claim 1, is characterized in that machining parameters in the step ten are n=1000-1200 r/min, and f=0.03-0.05 mm/r.
6. The method for machining the short cylindrical roller bearing retainer with the positioning flange on the outer ring, which is disclosed in claim 1, is characterized in that the technological parameters of the eleventh grinding wheel are n=2500-3000 r/min and f=0.01-0.02 mm/r; the technological parameters of the twelve grinding wheels are n=1500-1650r/min, and f=0.02-0.04 mm/r; the process parameters of the thirteenth step are n=1100-1300 r/min, and f=0.08-0.12 mm/r; fourteen steps are performed with the technological parameters of n=800-1000 r/min and f=0.06-0.1 mm/r; the technological parameters in the fifteenth step are n=900-1300 r/min and f=0.08-0.13 mm/r.
7. The method for processing the short cylindrical roller bearing retainer with the positioning flange on the outer ring, which is disclosed in claim 1, is characterized in that the technological parameters of seventeen are n=500-700 r/min and f=150-180 mm/min; the milling outer step claw cutter is an integrally formed hard alloy disc milling cutter, and the shape of the milling cutter is the same as that of the outer step claw of the retainer.
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