CN108436393A - A kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling - Google Patents
A kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling Download PDFInfo
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- CN108436393A CN108436393A CN201810229666.2A CN201810229666A CN108436393A CN 108436393 A CN108436393 A CN 108436393A CN 201810229666 A CN201810229666 A CN 201810229666A CN 108436393 A CN108436393 A CN 108436393A
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- Prior art keywords
- milling
- retainer
- roller bearing
- cylinder roller
- processing method
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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
-
- 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
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
Abstract
A kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling, it is related to a kind of retainer processing technology, the present invention is not up to standard to solve retainer outer diameter and internal diameter machining accuracy, retainer outer diameter and inside diameter surface roughness are unqualified, retainer outer diameter and internal diameter size are unstable, and lead to pocket hole precision and the underproof problem of surface quality with processing pocket hole is moved to.The present invention includes following process successively：It is rough turn to be molded, is quenched, the molding of thin vehicle, grind both ends of the surface, mill outer diameter, mill internal diameter, vehicle outer step, brill milling pocket hole, deburring, milling step pawl, deburring, marking, light decorations, split pawl, cleaning, fluorescent magnetic particle flaw detection, cleaning, dynamic balancing, cleaning, final inspection, silver-plated and packaging.Invention improves the machining accuracy of retainer internal-and external diameter surface and end face, avoids the generation of interrupted process tool tipping phenomenon, improves cutting-tool's used life.The present invention is suitable for cylinder roller bearing solid cage.
Description
Technical field
Present invention relates particularly to a kind of cylinder roller bearing solid cage processing method and Set and Positioning toolings.
Background technology
Cylinder roller bearing solid cage conventional process flow is rough turn molding, quenched, thin vehicle molding, mill outer diameter, vehicle
Internal diameter, drilling, broaching pocket hole, deburring, vehicle outer step, eventually interior diameter, deburring, milling step pawl, deburring, manual mark
Note, light decorations split pawl, cleaning, fluorescent magnetic particle flaw detection, cleaning, dynamic balancing, cleaning, final inspection, silver-plated and packaging.
Traditional technological process is will to process pocket hole procedure arrangement before vehicle outer step process, whole interior diameter process, this
When retainer not complete, the interrupted surface in inside and outside diameter surface, the outside diameter ovality processed according to existing technique
For 0.05~0.08mm, internal diameter ovality is 0.06~0.09, in vehicle outer step process, find outer step ovality it is bad,
Outer diameter is unstable；Outer step surface around pocket hole influences retainer presentation quality there are Vehicle Processing chatter mark phenomenon.And
And the phenomenon that there is also interrupted turning in interior diameter eventually, it is led there are Vehicle Processing chatter mark trace at pocket hole in inside diameter surface
Cause retainer presentation quality unqualified, since interrupted turning keeps tool wear very fast and cutter work in-process is easy to generate tipping
Phenomenon, so directly affecting the stability of dimension of inner and outer diameters.
Former technique pocket hole uses wire pulling method, and because broaching tool belongs to multiple tooth complex cutting tool, processing is very difficult, due to broaching tool system
The quality problems made cause retainer pocket hole precision and surface quality unqualified, and pocket hole quadrangle R is maximum 0.3, because of pocket hole
Quadrangle R processing difficulties ensure that the quadrangle R of retainer is qualified with the quadrangle of broaching tool, and so small quadrangle R size broaching tools are difficult to add
Work, and broaching tool, in wire pulling method, broaching tool quadrangle R serious wears, size is extremely uncontrollable unstable, can not ensure end product rule
Very little and product quality
Invention content
The present invention is not up to standard in order to solve retainer outer diameter and internal diameter machining accuracy, and retainer outer diameter and inside diameter surface are coarse
Spend unqualified, retainer outer diameter and internal diameter size are unstable, and lead to pocket hole precision and surface quality with broaching tool processing pocket hole
Underproof problem, and a kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling are provided.
The present invention adopts the technical scheme that solve above-mentioned technical problem：
Scheme one：A kind of cylinder roller bearing solid cage processing method, including following process：It is rough turn molding, it is quenched,
Thin vehicle molding grinds both ends of the surface, mill outer diameter, mill internal diameter, vehicle outer step, bores milling pocket hole, deburring, milling step pawl, deburring, beats
Label, splits pawl, cleaning, fluorescent magnetic particle flaw detection, cleaning, dynamic balancing, cleaning, final inspection, silver-plated and packaging process at light decorations.
Scheme two：A kind of cylinder roller bearing solid cage Set and Positioning tooling includes upper cover plate and lower cover；
Upper cover plate and lower cover are respectively provided with a cylindrical projection, and respectively the center of cylindrical projection is equipped with and machining center indexing
The through-hole of locating shaft clearance fit in disk center, the root of the cylindrical projection of upper cover plate and the root of lower cover cylindrical projection are each
Equipped with an annular escape groove, the cylindrical projection of upper cover plate and the cylindrical projection of lower cover are matched with the interior interporal lacuna of retainer respectively
It closes, lower cover is equipped with multiple mounting holes, and lower cover is inserted on locating shaft and is fixed on processing across mounting hole by bolt
On the index dial at center, retainer and upper cover plate are inserted on locating shaft successively, and pass through the spiral shell of nut and positioning shaft end
Line cooperation fastening.
The present invention has the advantages that compared with prior art：
One, the present invention improves the machining accuracy of retainer internal-and external diameter surface and end face, avoids what discontinuously processing was brought
Adverse consequences avoids the generation of interrupted process tool tipping phenomenon, improves cutting-tool's used life.
Two, the present invention is compared with existing processing method reduces two procedures, the process-cycle is shortened, to reduce life
Produce cost.
Description of the drawings
Fig. 1 is the overall structure figure of retainer Set and Positioning tooling of the present invention；
Fig. 2 is the front view of lower cover 2；
Fig. 3 is the A-A sectional views of Fig. 2；
Fig. 4 is the front view of upper cover plate 1；
Fig. 5 is the B-B sectional views of upper cover plate 1；
Fig. 6 is to maintain the front view of frame；
Fig. 7 is partial enlarged view at the I of Fig. 6.
Specific implementation mode
Specific implementation mode one：In conjunction with Fig. 6 and Fig. 7 come to illustrate present embodiment, present embodiment include following process：
It is rough turn to be molded, is quenched, the molding of thin vehicle, grind both ends of the surface, grind outer diameter eventually, whole mill internal diameter, vehicle outer step, bore milling pocket hole
3-1, it deburring, milling step pawl, deburring, marking, light decorations, splits pawl, is cleaning, fluorescent magnetic particle flaw detection, cleaning, dynamic balancing, clear
It washes, final inspection, silver-plated and packaging,
Present embodiment is by taking the implementation of a certain model bearing retainer 3 as an example：
Step 1：Rough turn molding：Internal diameter size21.8~21.95mm of panel height, outer diameter 1.0~1.2mm of chamfering；
Step 2：It is quenched；
Step 3：Thin vehicle molding：Internal diameter size20.15~20.2mm of panel height, outer diameter 0.5~0.6mm of chamfering；
Step 4：Grind two planes：19.95~19.98mm；
Step 5：Mill outer diameter eventually：
Step 6：Mill internal diameter eventually：
Step 7：Vehicle outer step：2.9~3.1mm of step width
Step 8：Milling pocket hole 3-1 is bored, by square hole working to 13.35 × 13.35mm (drawing requirement size),
Step 9：Deburring, surface Glabrous thorn；
Step 10：Milling step pawl is to size
Step 11：Deburring, surface Glabrous thorn；
Step 12：Laser marking；
Step 13：Light is adornd, and keeps surface-brightening corrosion-resistant, extends retainer service life；
Step 14：Split pawl；Rolling element is mounted in the pocket hole 3-1 of retainer 3,Roller must not be from
The outer diameter direction of retainer 3 drops out, and retainer should symmetrically with pocket hole 3-1 lock claw, and after retainer is packed into roller, roller must not
Protrude retainer internal diameter；
Step 15：Cleaning workpiece surface makes surface free from admixture without dirt；
Step 10 six：Magnetic powder inspection；Purpose is whether detection keeps frame material defective；
Step 10 seven：Cleaning makes retainer surface without oil stain without dirt；
Step 10 eight：Dynamic balancing；
Purpose is to improve the service life and reliability of retainer, in bearing working retainer imbalance can make rolling element with
The abrasion of retainer curb girder is larger, and bearing temperature is higher, causes curb girder deformation to be even broken, therefore to bearing retainer into action
Balance；
Step 10 nine：Cleaning；
Step 2 ten：Final inspection.According to drawing size and require to detect the retainer machined.
The procedure arrangement of pocket hole 3-1 will be processed after mill outer diameter eventually and eventually mill internal diameter engineering, the outer diameter of pocket hole 3-1 and interior
Diameter is final finished size, avoids the problem that discontinuously the low tool wear of precision caused by processing is fast；
The setting of vehicle outer step is completed the final processing of the outer circle of retainer 3, is kept after mill outer diameter eventually and eventually mill internal diameter
The both ends of the surface and internal diameter of frame 3 are to process the benchmark of pocket hole 3-1, will grind both ends of the surface and grind internal diameter setting eventually and bore milling pocket hole 3-1
It can make axial position degree and the circumferential position degree of pocket hole 3-1 more accurate before, the phase mutual deviation of pocket hole 3-1 is made to increase；
Using milling cutter come substitute prior art broaching tool processing, once completed using numerical control machining center pocket hole 3-1 rough mill and finish-milling
Processing makes retainer 3 once be loaded and completes the processing of pocket hole 3-1, improves the precision of pocket hole 3-1, pass through changing for the above process
Into, can make the outer diameter of retainer 3 ovality control between 0.004~0.007mm, outer diameter scattered error control exists
Between 0.002~0.003mm, internal diameter ovality controls between 0.005~0.008mm, and internal diameter size scattered error is controlled 0.003
Between~0.005mm.
Specific implementation mode two：Illustrate that present embodiment, present embodiment bore milling pocket hole 3-1 processes in conjunction with Fig. 6 and Fig. 7
The step of be：Retainer 3 is fixed on the index dial of numerical control machining center using retainer tooling, four holes of first drilling, then
Square hole milling is intersected to form stress buffer slot 3-3, last milling to drawing requirement by milling square hole to the hole with four drillings
Size repeats remaining pocket hole 3-1 on step brill milling workpiece circumference after index dial isogonism point.
Four holes of drilling useCarbide drill, feed speed be 50~70mm/min, rotating speed n=3500
~4000r/min.
Other compositions and connection relation are same as the specific embodiment one.
Specific implementation mode three：Illustrate present embodiment in conjunction with Fig. 6, milling square hole step is described in present embodiment：
First drawbore, later four fillets of half finish-milling surrounding and square hole again, last finish-milling to desired size.
Drilling usesCarbide drill, feed speed are 50~70mm/min, n1350~1400r/min, elder generation
Using big drill bit roughing, reduce the square hole working time, then use the three milling tool square holes different-diameter, using three milling
Knife be in order to make the fillet of square hole surrounding become smaller, it is final and fourHole be crossed to form stress buffer slot 3-3.
It is the stress concentration for avoiding pocket hole that stress buffer slot 3-3 mono-, which is arranged, second is that avoiding surrounding institute during pockets processing
The fillet interferenceed with rolling element generated.
Other compositions and connection relation are identical with embodiment two.
Specific implementation mode four：Illustrate present embodiment in conjunction with Fig. 6, half finish-milling in milling square hole described in present embodiment
Using the milling cutter of two different-diameters, before this with the milling tool being relatively large in diameter, the feed speed of milling is 75~80mm/min,
Milling cutter rotating speed is 3000~3500r/min；Again with the smaller milling tool of diameter, the feed speed of milling is 75~80mm/
Min, milling cutter rotating speed are 4000~4500r/min.
Other compositions and connection relation are the same as the specific implementation mode 3.
Specific implementation mode five：Finish-milling described in present embodiment uses diameterMilling cutter, the feed speed 65 of finish-milling~
The rotating speed of 75mm/min, milling cutter are n=5000~5500r/min.
Other compositions and connection relation are identical as specific implementation mode three or four.
Specific implementation mode six：Illustrate present embodiment in conjunction with Fig. 6, present embodiment is in vehicle outer step, in workpiece
Outer surface width direction center turning cross section is the protrusion of isosceles trapezoid.
Other compositions and connection relation are identical as specific implementation mode five.
Specific implementation mode seven：Illustrate present embodiment, a kind of cylindrical roller axis of present embodiment in conjunction with Fig. 1~Fig. 5
Holding solid cage Set and Positioning tooling, it includes upper cover plate 1 and lower cover 2；
Upper cover plate 1 and lower cover 2 are respectively provided with a cylindrical projection 1-1, and respectively the center of cylindrical projection 1-1 is equipped with and processing
The through-hole of supercentral 4 clearance fit of locating shaft of center index dial, the root of the cylindrical projection 1-1 of upper cover plate 1 and lower cover 2 are justified
The root of column protrusion 1-1 is respectively provided with an annular escape groove, the cylindrical projection 1-1 of upper cover plate 1 and the cylindrical projection 1-1 of lower cover 2
Respectively with the endoporus clearance fit of retainer 3, lower cover 2 is equipped with multiple mounting holes, and lower cover 2 is inserted on locating shaft 4 simultaneously
It is fixed on the index dial of machining center across mounting hole 2-1 by bolt, retainer 3 and upper cover plate 1 are inserted into successively fixed
On the axis 4 of position, and fastened by the screw-thread fit of nut and 4 end of locating shaft.
Claims (7)
1. a kind of cylinder roller bearing solid cage processing method, it includes following process successively：
It is rough turn to be molded, is quenched, thin vehicle molding, milling step pawl, deburring, marking, light decorations, splitting pawl, cleaning, fluorescentmagnetic particle(powder) spy
Wound, cleaning, dynamic balancing, cleaning, final inspection, silver-plated and packaging process, it is characterised in that：Thin vehicle molding and milling step pawl process it
Between also include successively grind both ends of the surface, eventually mill outer diameter, eventually mill internal diameter, vehicle outer step, bore milling pocket hole (3-1) and deburring operation.
2. a kind of cylinder roller bearing solid cage processing method according to claim 1, it is characterised in that：Bore milling pocket
The step of hole (3-1) process is：Retainer (3) is fixed on the index dial of numerical control machining center using retainer tooling, first
Square hole milling is intersected to form stress buffer slot (3-3), most by four holes of drilling, then milling square hole to the hole with four drillings
Milling is to drawing requirement size afterwards, after index dial isogonism point, repeats remaining pocket hole (3- on step brill milling workpiece circumference
1)。
3. a kind of cylinder roller bearing solid cage processing method according to claim 2, it is characterised in that：The milling
Cutting square hole step is：First drawbore, later four fillets of half finish-milling surrounding and square hole again, last finish-milling to desired size.
4. a kind of cylinder roller bearing solid cage processing method according to claim 3, it is characterised in that：The milling
The milling cutter that half finish-milling in square hole uses two different-diameters is cut, before this with the milling tool being relatively large in diameter, the feed speed of milling
For 75~80mm/min, milling cutter rotating speed is 3000~3500r/min；Again with the smaller milling tool of diameter, the feeding speed of milling
Degree is 75~80mm/min, and milling cutter rotating speed is 4000~4500r/min.
5. a kind of cylinder roller bearing solid cage processing method according to claim 3 or 4, it is characterised in that：Institute
It states finish-milling and uses diameterMilling cutter, 65~75mm/min of feed speed of finish-milling, the rotating speed of milling cutter be n=5000~
5500r/min。
6. a kind of cylinder roller bearing solid cage processing method according to claim 5, it is characterised in that：Outside vehicle
It is the protrusion of isosceles trapezoid in outer surface of workpiece width direction center turning cross section when step.
7. a kind of cylinder roller bearing solid cage Set and Positioning tooling of processing method as described in claim 2 or 5, special
Sign is：It includes upper cover plate (1) and lower cover (2)；
Upper cover plate (1) and lower cover (2) are respectively provided with a cylindrical projection (1-1), and respectively the center of cylindrical projection (1-1) be equipped with
The through-hole of the supercentral locating shaft of machining center index dial (4) clearance fit, the root of the cylindrical projection (1-1) of upper cover plate (1)
Be respectively provided with an annular escape groove with the root of lower cover (2) cylindrical projection (1-1), the cylindrical projection (1-1) of upper cover plate (1) and under
The endoporus clearance fit with retainer (3), lower cover (2) are equipped with multiple mounting holes to the cylindrical projection (1-1) of cover board (2) respectively
(2-1), the indexing that lower cover (2) is inserted on locating shaft (4) and passes through mounting hole (2-1) to be fixed on machining center by bolt
On disk, retainer (3) and upper cover plate (1) are inserted into successively on locating shaft (4), and pass through nut and locating shaft (4) end
Screw-thread fit fastens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810229666.2A CN108436393A (en) | 2018-03-20 | 2018-03-20 | A kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810229666.2A CN108436393A (en) | 2018-03-20 | 2018-03-20 | A kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling |
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| CN201810229666.2A Pending CN108436393A (en) | 2018-03-20 | 2018-03-20 | A kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027011A (en) * | 2018-09-20 | 2018-12-18 | 洛阳华冠齿轮股份有限公司 | A kind of differential assembly cylindrical roller thrust spherical bearing and its processing method |
| CN109500549A (en) * | 2018-12-06 | 2019-03-22 | 中国航发哈尔滨轴承有限公司 | A kind of cylindrical roller bearing without inner ring steel alloy solid cage processing method |
| CN109604967A (en) * | 2018-12-27 | 2019-04-12 | 中国航发哈尔滨轴承有限公司 | A kind of 40CrNiMoA material retainer splits pawl processing method |
| CN110253231A (en) * | 2019-07-19 | 2019-09-20 | 中国航发哈尔滨轴承有限公司 | A kind of processing method removing solid cage burr |
| CN110465817A (en) * | 2019-09-25 | 2019-11-19 | 中国航发哈尔滨轴承有限公司 | The frock clamp and retainer pocket hole fore shaft processing method of retainer mill outer step pawl |
| CN110961705A (en) * | 2019-12-25 | 2020-04-07 | 中国航发哈尔滨轴承有限公司 | Milling method for square pocket of short cylindrical roller bearing retainer |
| CN111037241A (en) * | 2020-01-14 | 2020-04-21 | 瓦房店阿科比轴承有限公司 | Comb type retainer preparation process |
| CN111482775A (en) * | 2020-05-09 | 2020-08-04 | 中国航发哈尔滨轴承有限公司 | Method for machining metal solid cage with special-shaped pocket holes |
| CN111546016A (en) * | 2020-05-27 | 2020-08-18 | 贵州天马虹山轴承有限公司 | One-step machining forming process for steel bearing retainer |
| CN111906504A (en) * | 2020-08-14 | 2020-11-10 | 中国航发哈尔滨轴承有限公司 | Finish machining method for aviation high-speed bearing retainer |
| CN112475825A (en) * | 2020-11-20 | 2021-03-12 | 重庆江增船舶重工有限公司 | Machining method for stepped ring groove of sliding bearing of supercharger |
| CN114046304A (en) * | 2021-11-25 | 2022-02-15 | 中国航发哈尔滨轴承有限公司 | Aluminum sheet and bakelite holder bonding processing tool |
| CN114535940A (en) * | 2022-03-24 | 2022-05-27 | 中国航发哈尔滨轴承有限公司 | Processing method of short cylindrical roller bearing retainer with positioning flange on outer ring |
| CN114749871A (en) * | 2022-04-19 | 2022-07-15 | 中国航发哈尔滨轴承有限公司 | Method for machining outer ring of large-joint bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027011A (en) * | 2018-09-20 | 2018-12-18 | 洛阳华冠齿轮股份有限公司 | A kind of differential assembly cylindrical roller thrust spherical bearing and its processing method |
| CN109500549A (en) * | 2018-12-06 | 2019-03-22 | 中国航发哈尔滨轴承有限公司 | A kind of cylindrical roller bearing without inner ring steel alloy solid cage processing method |
| CN109604967A (en) * | 2018-12-27 | 2019-04-12 | 中国航发哈尔滨轴承有限公司 | A kind of 40CrNiMoA material retainer splits pawl processing method |
| CN110253231B (en) * | 2019-07-19 | 2021-05-25 | 中国航发哈尔滨轴承有限公司 | Machining method for removing burrs of solid retainer |
| CN110253231A (en) * | 2019-07-19 | 2019-09-20 | 中国航发哈尔滨轴承有限公司 | A kind of processing method removing solid cage burr |
| CN110465817B (en) * | 2019-09-25 | 2021-07-23 | 中国航发哈尔滨轴承有限公司 | Method for processing locking mouth of cage pocket |
| CN110465817A (en) * | 2019-09-25 | 2019-11-19 | 中国航发哈尔滨轴承有限公司 | The frock clamp and retainer pocket hole fore shaft processing method of retainer mill outer step pawl |
| CN110961705A (en) * | 2019-12-25 | 2020-04-07 | 中国航发哈尔滨轴承有限公司 | Milling method for square pocket of short cylindrical roller bearing retainer |
| CN111037241A (en) * | 2020-01-14 | 2020-04-21 | 瓦房店阿科比轴承有限公司 | Comb type retainer preparation process |
| CN111482775A (en) * | 2020-05-09 | 2020-08-04 | 中国航发哈尔滨轴承有限公司 | Method for machining metal solid cage with special-shaped pocket holes |
| CN111546016A (en) * | 2020-05-27 | 2020-08-18 | 贵州天马虹山轴承有限公司 | One-step machining forming process for steel bearing retainer |
| CN111906504A (en) * | 2020-08-14 | 2020-11-10 | 中国航发哈尔滨轴承有限公司 | Finish machining method for aviation high-speed bearing retainer |
| CN112475825A (en) * | 2020-11-20 | 2021-03-12 | 重庆江增船舶重工有限公司 | Machining method for stepped ring groove of sliding bearing of supercharger |
| CN114046304A (en) * | 2021-11-25 | 2022-02-15 | 中国航发哈尔滨轴承有限公司 | Aluminum sheet and bakelite holder bonding processing tool |
| CN114535940A (en) * | 2022-03-24 | 2022-05-27 | 中国航发哈尔滨轴承有限公司 | Processing method of short cylindrical roller bearing retainer with positioning flange on outer ring |
| CN114535940B (en) * | 2022-03-24 | 2023-12-15 | 中国航发哈尔滨轴承有限公司 | Processing method of short cylindrical roller bearing retainer with positioning flange on outer ring |
| CN114749871A (en) * | 2022-04-19 | 2022-07-15 | 中国航发哈尔滨轴承有限公司 | Method for machining outer ring of large-joint bearing |
| CN114749871B (en) * | 2022-04-19 | 2023-09-12 | 中国航发哈尔滨轴承有限公司 | Method for machining outer ring of large knuckle bearing |
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Application publication date: 20180824 |