CN112621477A - Polishing equipment for bearing raceway - Google Patents
Polishing equipment for bearing raceway Download PDFInfo
- Publication number
- CN112621477A CN112621477A CN202011518560.8A CN202011518560A CN112621477A CN 112621477 A CN112621477 A CN 112621477A CN 202011518560 A CN202011518560 A CN 202011518560A CN 112621477 A CN112621477 A CN 112621477A
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- China
- Prior art keywords
- polishing
- fixedly connected
- bearing
- grinding
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 82
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 210000000078 claw Anatomy 0.000 claims description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 5
- 241001330002 Bambuseae Species 0.000 claims description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 5
- 239000011425 bamboo Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims 4
- 238000010168 coupling process Methods 0.000 claims 4
- 238000005859 coupling reaction Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- 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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
-
- 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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention discloses polishing equipment for a bearing raceway, and relates to the technical field of bearing processing; comprises an operating platform, a supporting frame, a fixing device, a main motor and a polishing mechanism; the fixing device is fixedly connected inside the operating platform and comprises a self-centering chuck, an electric push rod and a fixing head; the polishing mechanism comprises a rotating shaft, a polishing base, a plurality of rotating cylinders and polishing rods, wherein the plurality of groups of rotating cylinders are uniformly distributed in the cavity of the polishing base; one end of the polishing rod is sleeved in the rotary cylinder, the other end of the polishing rod extends out of the polishing base, and the polishing rod is in threaded fit with the rotary cylinder; the bearing seat in the rotating shaft is fixedly connected with the top end of the transmission rod, the bottom end of the transmission rod is fixedly connected with a conical gear with a vertical axis, the tail of the rotating cylinder is fixedly connected with a conical gear with a horizontal axis, and the transmission rod is matched with the conical gear of the rotating cylinder. This device provides efficient fixing device and adjustable grinding machanism, has improved the efficiency of polishing and equipment makes application scope.
Description
Technical Field
The invention relates to the technical field of bearing processing, in particular to polishing equipment for a bearing raceway.
Background
The bearing makes a hardware part widely used in modern industry play a unique role in most mechanical equipment. The bearing has various types, and different mechanisms are provided for adapting to different working environments, but the basic structure of the bearing generally comprises an outer ring, an inner ring and balls. In the process of grinding the bearing, the outer side is convenient to grind, but the grinding inside the roller path is relatively difficult, and the conventional grinding equipment can only basically use the grinding work of a certain type of specific bearing.
Chinese utility model patent specification CN210550181U discloses a bearing ring equipment of polishing, and this equipment includes pneumatic cylinder, driving motor, grinding machanism and fixed establishment etc. and this equipment can fix the bearing ring to polish the not unidimensional lasso raceway. However, the device has poor fixing effect, is easy to slide during grinding, has small space in a grinding mechanism, is difficult to put in a turbine structure, and is easy to accelerate the damage of the turbine during high-speed rotation.
Disclosure of Invention
The invention aims to provide grinding equipment for a bearing raceway so as to solve the problems in the background technology. A more effective fixing device and a more stable and efficient polishing mechanism are selected, so that the practical service life of the equipment is longer, and the equipment is more practical and convenient.
In order to achieve the purpose, the invention provides the following technical scheme:
a polishing device for a bearing raceway comprises an operation table, a support frame, a fixing device, a main motor and a polishing mechanism; the support frame is fixedly connected above the operating platform; the fixing device is fixedly connected inside the operating platform and comprises a self-centering chuck, an electric push rod and a fixing head; the polishing mechanism comprises a rotating shaft, a polishing base, a plurality of rotating cylinders and polishing rods, wherein the plurality of groups of rotating cylinders are uniformly distributed in the cavity of the polishing base; one end of the polishing rod is sleeved in the rotary cylinder, the other end of the polishing rod extends out of the polishing base and is fixedly connected with a polishing head, and the polishing rod is in threaded fit with the rotary cylinder; the rotary shaft is fixedly connected with a bearing seat inside, the bearing seat is fixedly connected with the top end of a transmission rod, the bottom end of the transmission rod is fixedly connected with a conical gear with a vertical axis, the tail of the rotary cylinder is fixedly connected with a conical gear with a horizontal axis, and the transmission rod is matched with the conical gear of the rotary cylinder.
As a further scheme of the invention: the rotary cylinder is connected with the polishing base through a bearing sleeve, and a limiting strip is fixedly connected to the side face of the polishing rod.
As a still further scheme of the invention: the polishing device is characterized in that a conical gear is fixedly connected to the upper end of the transmission rod, a polishing knob is fixedly connected to the side face of the rotating shaft, the polishing knob penetrates through the side wall of the rotating shaft and is fixedly connected with the conical gear, and the conical gear at the upper end of the transmission rod is matched with the conical gear of the polishing knob.
As a still further scheme of the invention: the main motor is fixedly connected inside the top end support frame, the rotating shaft is connected with the support frame through a bearing seat, and the top end of the rotating shaft is fixedly connected with the main motor.
As a still further scheme of the invention: the self-centering chuck comprises a large bevel gear, a small bevel gear and a claw disk base.
As a still further scheme of the invention: the upper surface of the large bevel gear is a plane thread, the small bevel gear is matched with the lower surface of the large bevel gear, the thread at the bottom of the claw disk base is matched with the plane thread, and the claw disk bases are symmetrically distributed on the large bevel gear.
As a still further scheme of the invention: the electric operating platform is characterized in that an electric push rod is fixedly connected above the claw disc base, a fixing head is fixedly connected to the top of the electric push rod, a plurality of groups of through grooves which are uniformly and symmetrically distributed and point to the circle center from the circumference of the large bevel gear are formed in the surface of the operating platform, and the electric push rod penetrates through the through grooves to stretch out of the surface of the operating platform.
As a still further scheme of the invention: the side surface of the operating platform is provided with a fixed knob, and the fixed knob penetrates through the side wall of the operating platform and is fixedly connected with a small bevel gear.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the polishing equipment for the bearing raceway, the self-centering chuck is adopted to fix the bearing ring, the circular position can be automatically determined without manual fixation, the fixing effect is good, the bearing ring is prevented from deviating, the distance can be adjusted only by rotating the fixing knob by the self-centering chuck, and the polishing equipment is suitable for polishing bearings with different sizes in the fixing process;
by adopting the polishing equipment for the bearing raceway, the electric push rod is adopted to support the fixing head, the fixed bearing sleeve can still move up and down, the disassembly is convenient, and the height of the bearing ring can be conveniently adjusted during polishing;
adopt the equipment of polishing of above-mentioned bearing raceway, when rotatory knob of polishing, drive the transfer line and rotate, and then drive rotatory section of thick bamboo rotatory, because spacing restriction polishing rod can not polish the base rotatory relatively, so the polishing rod can take place to extend and contract by screw drive, because the conical gear of transfer line bottom controls all rotatory sections of thick bamboo simultaneously and rotates, so all polishing heads are synchronous flexible when rotatory knob of polishing to adapt to not unidimensional bearing ring.
Drawings
Fig. 1 is a schematic structural diagram of a grinding device for bearing raceways.
Fig. 2 is a schematic structural diagram of a grinding mechanism in the grinding device for the bearing raceway.
Fig. 3 is a schematic structural diagram of a large bevel gear in a grinding device of a bearing raceway from top view.
Fig. 4 is a schematic structural diagram of a top view of an operation table in the grinding device of the bearing raceway.
In the figure: 1. an operation table; 2. a support frame; 3. a fixing device; 4. a large bevel gear; 5. a claw disk base; 6. an electric push rod; 7. a bevel pinion gear; 8. a fixed head; 9. polishing head; 10. a polishing mechanism; 11. a rotating shaft; 12. a bearing seat; 13. a main motor; 14. grinding the rod; 15. polishing the base; 16. a rotary drum; 17. a bevel gear; 18. a bearing sleeve; 19. a limiting strip; 20. a transmission rod; 21. polishing the knob; 22. fixing the knob; 23. a through groove; 24. self-centering chucks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 to 4, in embodiment 1 of the present invention, a polishing apparatus for a bearing raceway includes an operation table 1, a support frame 2, a fixing device 3, a main motor 13, and a polishing mechanism 10; the support frame 2 is fixedly connected above the operating platform 1; the fixing device 3 is fixedly connected inside the operating table 1, and the fixing device 3 comprises a self-centering chuck 24, an electric push rod 6 and a fixing head 8; the polishing mechanism 10 comprises a rotating shaft 11, a polishing base 15, a plurality of rotating cylinders 16 and a polishing rod 14, wherein the plurality of groups of rotating cylinders 16 are uniformly distributed in the cavity of the polishing base 15; one end of the polishing rod 14 is sleeved in the rotary cylinder 16, the other end of the polishing rod extends out of the polishing base 15 and is fixedly connected with the polishing head 9, and the polishing rod 14 is in threaded fit with the rotary cylinder 16; a bearing seat 12 is fixedly connected inside the rotating shaft 11, the bearing seat 12 is fixedly connected with the top end of a transmission rod 20, a conical gear 17 with a vertical axis is fixedly connected with the bottom end of the transmission rod 20, a conical gear 17 with a horizontal axis is fixedly connected with the tail of the rotating cylinder 16, and the transmission rod 20 is matched with the conical gear 17 of the rotating cylinder 16.
When the device is used, a bearing ring to be polished is fixed above the operating platform 1 through the fixing head 8, the main motor 13 is started, and the roller path on the inner side of the bearing ring can be polished through the polishing device.
The rotary cylinder 16 is connected with the grinding base 15 through a bearing sleeve 18, and a limiting strip 19 is fixedly connected to the side surface of the grinding rod 14. The upper end of the transmission rod 20 is fixedly connected with a conical gear 17, the side face of the rotating shaft 11 is fixedly connected with a polishing knob 21, the polishing knob 21 penetrates through the side wall of the rotating shaft 11 and is fixedly connected with the conical gear 17, and the conical gear 17 at the upper end of the transmission rod 20 is matched with the conical gear 17 of the polishing knob 21. The main motor 13 is fixedly connected inside the top end support frame 2, the rotating shaft 11 is connected with the support frame 2 through the bearing seat 12, and the top end of the rotating shaft 11 is fixedly connected with the main motor 13.
Example 2
Referring to fig. 1 to 4, the main differences between the embodiment 2 and the embodiment 1 are:
the self-centering chuck 24 includes a large bevel gear 4, a small bevel gear 7, and a jaw plate base 5. The upper surface of the large bevel gear 4 is a plane thread, the small bevel gear 7 is matched with the lower surface of the large bevel gear 4, the thread at the bottom of the claw disk base 5 is matched with the plane thread, and the claw disk bases 5 are symmetrically distributed on the large bevel gear 4. An electric push rod 6 is fixedly connected above the claw disc base 5, a fixing head 8 is fixedly connected to the top of the electric push rod 6, a plurality of groups of through grooves 23 which are uniformly and symmetrically distributed and point to the circle center from the circumference of the large bevel gear 4 are formed in the surface of the operating platform 1, and the electric push rod 6 penetrates through the through grooves 23 to stretch out of the surface of the operating platform 1. The side surface of the operating platform 1 is provided with a fixed knob 22, and the fixed knob 22 passes through the side wall of the operating platform 1 and is fixedly connected with a small bevel gear 7.
The fixing knob 22 is rotated to move the claw disk base 5 outwards to enable the distance between the fixing heads 8 to be modulated maximally, the bearing ring is placed in the middle of the fixing heads 8, the fixing knob 22 is rotated again to enable the claw disk base 5 to move towards the middle until all the fixing heads 8 are clamped on the outer side of the bearing ring, and fixing work is completed. At this moment, the electric push rod 6 is started, the fixing head 8 is lifted to the horizontal position of the polishing device, and the polishing base 15 is embedded into the bearing ring, so that polishing can be started.
The working principle of the invention is as follows:
the self-centering chuck 24 is matched with the thread at the bottom of the chuck base 5 through the centripetal horizontal thread on the surface, and the through groove 23 limits that the chuck base 5 can only move along the radius line of the large bevel gear 4, so that when the large bevel gear 4 is driven to rotate by the small bevel gear 7, the chuck base 5 is driven to move along the through groove 23, and an object at the position of the fixed head 8 is fixed or fixed. A plurality of groups of rotary cylinders 16 which can only rotate along the axes of the rotary cylinders are fixedly connected inside the polishing base 15, the rotary cylinders 16 are driven by the transmission rod 20 through the conical gears 17 at the tail parts, and the internal threads drive the polishing rods 14 to extend or contract when the rotary cylinders 16 rotate, so that the radius of the polishing heads 9 is controlled to be prevented from being blocked or reduced, and the polishing heads are adapted to bearing rings with different radii.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The grinding equipment for the bearing raceway is characterized by comprising an operation table (1), a support frame (2), a fixing device (3), a main motor (13) and a grinding mechanism (10); the support frame (2) is fixedly connected above the operating platform (1); the fixing device (3) is fixedly connected inside the operating table (1), and the fixing device (3) comprises a self-centering chuck (24), an electric push rod (6) and a fixing head (8); the polishing mechanism (10) comprises a rotating shaft (11), a polishing base (15), a plurality of rotating cylinders (16) and a polishing rod (14), wherein the plurality of groups of rotating cylinders (16) are uniformly distributed in the cavity of the polishing base (15); one end of the polishing rod (14) is sleeved in the rotary cylinder (16), the other end of the polishing rod extends out of the polishing base (15) and is fixedly connected with the polishing head (9), and the polishing rod (14) is in threaded fit with the rotary cylinder (16); the inside rigid coupling of rotation axis (11) has bearing frame (12), the top of bearing frame (12) rigid coupling transfer line (20), transfer line (20) bottom rigid coupling has conical gear (17) of vertical axis, rotatory section of thick bamboo (16) afterbody rigid coupling has conical gear (17) of horizontal axis, transfer line (20) and conical gear (17) cooperation of rotatory section of thick bamboo (16).
2. Grinding equipment for bearing raceways according to claim 1, characterized in that the rotating drum (16) is connected with the grinding base (15) through a bearing sleeve (18), and a limit strip (19) is fixed to the side of the grinding bar (14).
3. The grinding equipment for the bearing raceway according to claim 1, characterized in that, the upper end of the transmission rod (20) is fixedly connected with a conical gear (17), the side of the rotating shaft (11) is fixedly connected with a grinding knob (21), the grinding knob (21) penetrates through the side wall of the rotating shaft (11) and is fixedly connected with the conical gear (17), and the conical gear (17) at the upper end of the transmission rod (20) is matched with the conical gear (17) of the grinding knob (21).
4. The grinding equipment for the bearing raceway according to claim 1, characterized in that, the main motor (13) is fixedly connected inside the top end support frame (2), the rotating shaft (11) is connected with the support frame (2) through a bearing seat (12), and the top end of the rotating shaft (11) is fixedly connected with the main motor (13).
5. Grinding device of a bearing raceway according to claim 1, characterized in that the self-centering chuck (24) comprises a large bevel gear (4), a small bevel gear (7) and a claw disc mount (5).
6. The grinding equipment for the bearing raceway according to claim 1 or 5, characterized in that, the big bevel gear (4) upper surface is a plane screw thread, the small bevel gear (7) is engaged with the big bevel gear (4) lower surface, the screw thread of the claw disk base (5) bottom is engaged with the plane screw thread, the claw disk base (5) is symmetrically distributed on the big bevel gear (4).
7. The grinding equipment for the bearing raceway according to claim 1 or 5, wherein an electric push rod (6) is fixedly connected above the claw disc base (5), a fixing head (8) is fixedly connected to the top of the electric push rod (6), a plurality of groups of through grooves (23) which are uniformly and symmetrically distributed and point to the circle center from the circumference of the large bevel gear (4) are formed in the surface of the operating platform (1), and the electric push rod (6) penetrates through the through grooves (23) and extends out of the surface of the operating platform (1).
8. The grinding equipment for the bearing raceway according to claim 1 or 5, characterized in that a fixing knob (22) is arranged on the side surface of the operating platform (1), and the fixing knob (22) penetrates through the side wall of the operating platform (1) and is fixedly connected with the bevel pinion (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011518560.8A CN112621477A (en) | 2020-12-21 | 2020-12-21 | Polishing equipment for bearing raceway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011518560.8A CN112621477A (en) | 2020-12-21 | 2020-12-21 | Polishing equipment for bearing raceway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112621477A true CN112621477A (en) | 2021-04-09 |
Family
ID=75320346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011518560.8A Pending CN112621477A (en) | 2020-12-21 | 2020-12-21 | Polishing equipment for bearing raceway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112621477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115401592A (en) * | 2022-11-01 | 2022-11-29 | 徐州优力同创科技股份有限公司 | Polishing device for interior of metal bearing ring |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3927873A (en) * | 1973-08-09 | 1975-12-23 | Glass Tubes & Components Ltd | Self-centering chuck |
| CN103286336A (en) * | 2013-05-08 | 2013-09-11 | 左进保 | High-precision self-centering chuck |
| CN109648411A (en) * | 2019-01-22 | 2019-04-19 | 马鞍山市粤美金属制品科技实业有限公司 | A kind of rotating disc type bearing machining inner ring equipment for grinding and method for grinding |
| CN209936575U (en) * | 2019-04-04 | 2020-01-14 | 新昌县大市聚镇伯凡机械厂 | Grinding device is used in bearing processing of convenient regulation |
| CN210550181U (en) * | 2019-07-28 | 2020-05-19 | 新昌县双驰轴承有限公司 | Polishing equipment for bearing ring |
| CN210997843U (en) * | 2019-12-11 | 2020-07-14 | 馆陶县鑫荣轴承有限公司 | Polishing device for bearing ring and convenient for adjusting polishing area |
-
2020
- 2020-12-21 CN CN202011518560.8A patent/CN112621477A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3927873A (en) * | 1973-08-09 | 1975-12-23 | Glass Tubes & Components Ltd | Self-centering chuck |
| CN103286336A (en) * | 2013-05-08 | 2013-09-11 | 左进保 | High-precision self-centering chuck |
| CN109648411A (en) * | 2019-01-22 | 2019-04-19 | 马鞍山市粤美金属制品科技实业有限公司 | A kind of rotating disc type bearing machining inner ring equipment for grinding and method for grinding |
| CN209936575U (en) * | 2019-04-04 | 2020-01-14 | 新昌县大市聚镇伯凡机械厂 | Grinding device is used in bearing processing of convenient regulation |
| CN210550181U (en) * | 2019-07-28 | 2020-05-19 | 新昌县双驰轴承有限公司 | Polishing equipment for bearing ring |
| CN210997843U (en) * | 2019-12-11 | 2020-07-14 | 馆陶县鑫荣轴承有限公司 | Polishing device for bearing ring and convenient for adjusting polishing area |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115401592A (en) * | 2022-11-01 | 2022-11-29 | 徐州优力同创科技股份有限公司 | Polishing device for interior of metal bearing ring |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210409 |