CN111002119A - Automatic loading and unloading device of cylindrical grinding machine for hollow bars - Google Patents
Automatic loading and unloading device of cylindrical grinding machine for hollow bars Download PDFInfo
- Publication number
- CN111002119A CN111002119A CN201911352636.1A CN201911352636A CN111002119A CN 111002119 A CN111002119 A CN 111002119A CN 201911352636 A CN201911352636 A CN 201911352636A CN 111002119 A CN111002119 A CN 111002119A
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- China
- Prior art keywords
- hollow
- rod
- core rod
- feeding
- hollow rod
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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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
-
- 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
- B24B5/355—Feeding means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention discloses an automatic loading and unloading device of a hollow bar cylindrical grinding machine, which comprises a hollow bar loading module, a core bar moving module, a hollow bar cylindrical grinding processing module and a discharging module, wherein the hollow bar loading module is used for loading a hollow bar; the hollow rod feeding module is used for automatically feeding a hollow rod and sleeving the hollow rod on the core rod; the mandrel moving module is used for moving the mandrel among a hollow bar feeding station, a hollow bar outer circle grinding station and a blanking station; the hollow rod external grinding processing module is used for carrying out external grinding processing on the hollow rod sleeved on the core rod; and the discharging module is used for pulling down and sending out the ground hollow rod from the upper surface of the core rod. The invention can greatly improve the automation level of the hollow rod external grinding processing and improve the processing precision and the production efficiency.
Description
Technical Field
The invention relates to an automatic loading and unloading device for a hollow bar cylindrical grinding machine.
Background
The hollow rod is a fitting of a sewing machine, and has high requirements on roundness, cylindricity and roughness of the hollow rod, so that the outer circle needs to be ground. At present, the manual mode is mostly adopted for excircle grinding, the efficiency is not high, and the automation degree is very low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an automatic feeding and discharging device for a cylindrical grinding machine of a hollow bar, which is used for solving the problems in the background art and has the advantages of convenient use and high automation degree of feeding and discharging.
In order to achieve the purpose, the invention is realized by the following technical scheme: the automatic loading and unloading device of the hollow bar cylindrical grinding machine comprises a hollow bar loading module, a core bar moving module, a hollow bar cylindrical grinding processing module and a discharging module; the hollow rod feeding module is used for automatically feeding a hollow rod and sleeving the hollow rod on the core rod; the mandrel moving module is used for moving the mandrel among a hollow bar feeding station, a hollow bar outer circle grinding station and a blanking station; the hollow rod external grinding processing module is used for carrying out external grinding processing on the hollow rod sleeved on the core rod; and the discharging module is used for pulling down and sending out the ground hollow rod from the upper surface of the core rod.
Furthermore, the hollow rod feeding module comprises a vibration disc, a guide chute, an anti-tilting cylinder, an anti-tilting piece, a material distributing groove, a material distributing cylinder, a material distributing L piece, a feeding groove, a feeding cylinder and a pressure sensor; the feeding trough comprises a movable trough and a fixed trough, and the movable trough is arranged on the fixed trough; the hollow rod is manually poured into the vibration disc, the vibration disc works to send the hollow rod out of the guide chute, the anti-tilting cylinder drives the anti-tilting member to move, the anti-tilting member is used for tilting the hollow rod, and the anti-tilting cylinder pushes the anti-tilting member to enable the hollow rod to enter the material distribution chute; the material distributing cylinder is driven by the material distributing cylinder to sequentially lift up and fall down, so that the continuous hollow rods are separated one by one, the hollow rods fall into the movable material groove of the material feeding groove one by one, and the material feeding cylinder pushes the movable material groove to move so as to sleeve the hollow rods on the core rods; and the pressure sensor is arranged between the feeding cylinder and the movable trough and used for detecting the pressure of the feeding cylinder for pushing the movable trough.
Further, the mandrel moving module comprises a mandrel moving manipulator and a mandrel moving air claw; the hollow rod external grinding machining module comprises an external grinding machine tool, a first core rod fastening motor, a second core rod fastening motor, a first lifting mechanism and a second lifting mechanism; the discharging module comprises a discharging cylinder, a stripping shifting block, a stripping spring and a discharging groove; the mandrel moving manipulator drives the mandrel moving gas claw to move up and down between the hollow bar loading station and the hollow bar outer circle grinding station, and the hollow bar loading station and the hollow bar unloading station are at the same position; when the hollow rod feeding device is positioned at a hollow rod feeding station, the core rod is tightly clamped by the core rod moving air claw, the feeding air cylinder drives the movable material groove to move, and the hollow rod is sleeved on the core rod; then the core rod material moving manipulator sends the core rod sleeved with the hollow rod to a station for grinding the excircle of the hollow rod, the core rod is clamped by the first core rod fastening motor and the second core rod fastening motor, and the first lifting mechanism and the second lifting mechanism carry out auxiliary positioning by lifting at the lower side of the core rod, so that the core rod is prevented from not being clamped and positioned inaccurately; after the core rod is clamped, the core rod material moving air claw is loosened, when the outer circle of the hollow rod is ground, the core rod material moving air claw again grabs the core rod and is driven by the core rod material moving mechanical arm to be conveyed to a blanking station; the discharging cylinder extends to push the stripping shifting block to shift the hollow rod from the core rod and drop the hollow rod to the discharging groove to be discharged; the stripping shifting block resets under the action of the stripping spring, and simultaneously, the core rod is sleeved with a hollow rod again.
Furthermore, the heads of the first core rod fastening motor and the second core rod fastening motor are respectively provided with a spring, the core rod is placed between the two springs, and the first core rod fastening motor and the second core rod fastening motor clamp the core rod in a straight line.
Furthermore, the upper parts of the first lifting mechanism and the second lifting mechanism are provided with semicircular lifting grooves matched with the outer circle of the core rod, and the lifting grooves are suitable for accommodating and lifting the core rod.
The invention has the beneficial effects that:
according to the invention, the hollow rod is automatically fed through the hollow rod feeding module, the hollow rod is automatically sleeved on the core rod, the core rod sleeved with the hollow rod is automatically moved among stations through the core rod moving module, the hollow rod is automatically subjected to external grinding processing through the external grinding processing module of the hollow rod, and the ground hollow rod is pulled down and sent out from the upper surface of the core rod through the discharging module, so that the automation level of external grinding processing of the hollow rod can be greatly improved, and the processing precision and the production efficiency are improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a first schematic structural view of a hollow bar feeding module according to an embodiment of the present invention;
FIG. 3 is a second schematic structural view of a hollow bar feeding module according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a mandrel moving module, a hollow rod external grinding machining module and a discharging module according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a mandrel moving module and a hollow rod external grinding module according to an embodiment of the present invention;
FIG. 6 is a schematic view of a hollow bar construction;
FIG. 7 is a schematic view of the structure of the mandrel;
fig. 8 is a schematic view of the assembly of the hollow bar with the mandrel.
In the figure: the device comprises a hollow rod feeding module 1, a vibrating disc 1-1, a guide chute 1-2, an anti-tilting cylinder 1-3, an anti-tilting member 1-4, a material distributing groove 1-5, a material distributing cylinder 1-6, a material distributing L member 1-7, a feeding groove 1-8, a movable material groove a, a fixed material groove b, a feeding cylinder 1-9 and a pressure sensor 1-10;
the core rod moving module 2, the core rod material moving manipulator 2-1 and the core rod material moving air claw 2-2;
the device comprises a hollow rod external grinding machining module 3, an external grinding machine tool 3-1, a first core rod fastening motor 3-2, a second core rod fastening motor 3-3, a first lifting mechanism 3-4 and a second lifting mechanism 3-5;
the device comprises a discharging module 4, a discharging cylinder 4-1, a stripping shifting block 4-2, a stripping spring 4-3 and a discharging groove 4-4;
a hollow rod 5;
a core rod 6.
Detailed Description
Before the embodiments are described in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of embodiments in other forms of implementation. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," "having," and the like, herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. In particular, when "a certain element" is described, the present invention is not limited to the number of the element being one, and may include a plurality of the elements.
Referring to fig. 1, 6-8, an embodiment of the present invention includes a hollow rod feeding module 1, a mandrel moving module 2, a hollow rod external grinding processing module 3 and a discharging module 4; the hollow rod feeding module 1 is used for automatically feeding a hollow rod 5 and sleeving the hollow rod 5 on a core rod 6; the mandrel moving module 2 is used for moving a mandrel 6 among a hollow bar feeding station, a hollow bar outer circle grinding station and a blanking station; the hollow rod external grinding machining module 3 is used for external grinding machining of the hollow rod 5 sleeved on the core rod 6; the discharging module 4 is used for pulling out the ground hollow rod 5 from the core rod 6.
As shown in fig. 2-3 and 6-8, the hollow rod feeding module 1 comprises a vibration disc 1-1, a material guide chute 1-2, an anti-tilting cylinder 1-3, an anti-tilting member 1-4, a material distribution chute 1-5, a material distribution cylinder 1-6, a material distribution L member 1-7, a feeding chute 1-8, a feeding cylinder 1-9 and a pressure sensor 1-10; the feeding troughs 1-8 comprise a movable trough a and a fixed trough b, and the movable trough a is arranged on the fixed trough b; manually pouring the hollow rod 5 into the vibration disc 1-1, enabling the vibration disc 1-1 to work to send the hollow rod 5 out to the material guide chute 1-2, enabling the anti-tilting cylinder 1-3 to drive the anti-tilting member 1-4 to move, enabling the anti-tilting member 1-4 to tilt the hollow rod, and enabling the anti-tilting cylinder 1-3 to push the anti-tilting member 1-4 to enable the hollow rod 5 to enter the material distribution chute 1-5; the material distributing grooves 1-5 are inclined, the hollow rods 5 roll to the lower ends of the material distributing grooves 1-5 under the action of gravity, the lower ends of the material distributing grooves 1-5 are provided with two material distributing L-shaped pieces 1-7, the material distributing L-shaped pieces 1-7 are mounted on the material distributing air cylinders 1-6, the two material distributing L-shaped pieces 1-7 are sequentially lifted and fall under the driving of the material distributing air cylinders 1-6, the continuous hollow rods 5 are separated one by one, the hollow rods 5 fall into the movable material grooves a of the material feeding grooves 1-8 one by one, and the material feeding air cylinders 1-9 push the movable material grooves a to move to sleeve the hollow rods 5 on the core rods 6; the pressure sensors 1-10 are arranged between the feeding cylinders 1-9 and the movable material groove a and used for detecting the thrust of the feeding cylinders 1-9 for pushing the movable material groove a so as to apply different thrusts to hollow rods of different types.
As shown in fig. 4-8, the mandrel moving module 2 comprises a mandrel moving manipulator 2-1 and a mandrel moving gas claw 2-2; the hollow rod external grinding machining module 3 comprises an external grinding machine tool 3-1, a first core rod fastening motor 3-2, a second core rod fastening motor 3-3, a first lifting mechanism 3-4 and a second lifting mechanism 3-5; the discharging module 4 comprises a discharging cylinder 4-1, a stripping shifting block 4-2, a stripping spring 4-3 and a discharging groove 4-4; the core rod material moving manipulator 2-1 drives the core rod material moving gas claw 2-2 to move up and down between the hollow rod feeding station and the hollow rod outer circle grinding station, and the hollow rod feeding station and the hollow rod discharging station are at the same position; when the hollow rod feeding device is positioned at a hollow rod feeding station, the core rod moving air claw 2-2 tightly grasps the core rod 6, the feeding air cylinder 1-9 drives the movable material groove a to move, and the hollow rod 5 is sleeved on the core rod 6; then, a core rod moving manipulator 2-1 sends a core rod 6 sleeved with a hollow rod 5 to a hollow rod outer circle grinding station, the core rod 6 is clamped by a first core rod fastening motor 3-2 and a second core rod fastening motor 3-3, specifically, the heads of the first core rod fastening motor 3-2 and the second core rod fastening motor 3-3 are both provided with springs, the core rod is placed between the two springs, and the first core rod fastening motor 3-2 and the second core rod fastening motor 3-3 clamp the core rod 6 in a straight line; the first lifting mechanism 3-4 and the second lifting mechanism 3-5 lift the lower side of the core rod for auxiliary positioning, and specifically, the upper parts of the first lifting mechanism 3-4 and the second lifting mechanism 3-5 are provided with semicircular lifting grooves matched with the outer circle of the core rod 6, and the lifting grooves are suitable for accommodating and lifting the core rod 6, so that the core rod 6 is prevented from being clamped and positioned inaccurately; after the core rod 6 is clamped, the core rod material moving air claw 2-2 is loosened, after the outer circle of the hollow rod 5 is ground, the core rod material moving air claw 2-2 re-grabs the core rod 6 and sends the core rod 6 to a blanking station under the drive of the core rod material moving mechanical arm 2-1; the discharging cylinder 4-1 extends to push the stripping shifting block 4-2 to shift the hollow rod 5 from the core rod 6 and fall to the discharging groove 4-4 to be discharged; the stripping shifting block 4-2 is reset under the action of the stripping spring 4-3, and simultaneously the core rod 6 is sleeved with a hollow rod 5 again.
The concepts described herein may be embodied in other forms without departing from the spirit or characteristics thereof. The particular embodiments disclosed should be considered illustrative rather than limiting. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. Any changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (5)
1. Automatic unloader that goes up of hollow bar cylindrical grinder, its characterized in that: the hollow rod external grinding device comprises a hollow rod feeding module, a core rod moving module, a hollow rod external grinding processing module and a discharging module;
the hollow rod feeding module is used for automatically feeding a hollow rod and sleeving the hollow rod on the core rod;
the mandrel moving module is used for moving the mandrel among a hollow bar feeding station, a hollow bar outer circle grinding station and a blanking station;
the hollow rod external grinding processing module is used for carrying out external grinding processing on the hollow rod sleeved on the core rod;
and the discharging module is used for pulling down and sending out the ground hollow rod from the upper surface of the core rod.
2. The automatic loading and unloading device of the hollow rod cylindrical grinding machine as claimed in claim 1, characterized in that: the hollow rod feeding module comprises a vibrating disc, a guide chute, an anti-tilting cylinder, an anti-tilting piece, a material distributing groove, a material distributing cylinder, a material distributing L piece, a feeding groove, a feeding cylinder and a pressure sensor; the feeding trough comprises a movable trough and a fixed trough, and the movable trough is arranged on the fixed trough; the hollow rod is manually poured into the vibration disc, the vibration disc works to send the hollow rod out of the guide chute, the anti-tilting cylinder drives the anti-tilting member to move, the anti-tilting member is used for tilting the hollow rod, and the anti-tilting cylinder pushes the anti-tilting member to enable the hollow rod to enter the material distribution chute; the material distributing cylinder is driven by the material distributing cylinder to sequentially lift up and fall down, so that the continuous hollow rods are separated one by one, the hollow rods fall into the movable material groove of the material feeding groove one by one, and the material feeding cylinder pushes the movable material groove to move so as to sleeve the hollow rods on the core rods; and the pressure sensor is arranged between the feeding cylinder and the movable trough and used for detecting the pressure of the feeding cylinder for pushing the movable trough.
3. The automatic loading and unloading device of the hollow rod cylindrical grinding machine as claimed in claim 2, characterized in that: the core rod moving module comprises a core rod material moving manipulator and a core rod material moving air claw; the hollow rod external grinding machining module comprises an external grinding machine tool, a first core rod fastening motor, a second core rod fastening motor, a first lifting mechanism and a second lifting mechanism; the discharging module comprises a discharging cylinder, a stripping shifting block, a stripping spring and a discharging groove;
the mandrel moving manipulator drives the mandrel moving gas claw to move up and down between the hollow bar loading station and the hollow bar outer circle grinding station, and the hollow bar loading station and the hollow bar unloading station are at the same position; when the hollow rod feeding device is positioned at a hollow rod feeding station, the core rod is tightly clamped by the core rod moving air claw, the feeding air cylinder drives the movable material groove to move, and the hollow rod is sleeved on the core rod; then the core rod material moving manipulator sends the core rod sleeved with the hollow rod to a station for grinding the excircle of the hollow rod, the core rod is clamped by the first core rod fastening motor and the second core rod fastening motor, and the first lifting mechanism and the second lifting mechanism carry out auxiliary positioning by lifting at the lower side of the core rod, so that the core rod is prevented from not being clamped and positioned inaccurately; after the core rod is clamped, the core rod material moving air claw is loosened, when the outer circle of the hollow rod is ground, the core rod material moving air claw again grabs the core rod and is driven by the core rod material moving mechanical arm to be conveyed to a blanking station; the discharging cylinder extends to push the stripping shifting block to shift the hollow rod from the core rod and drop the hollow rod to the discharging groove to be discharged; the stripping shifting block resets under the action of the stripping spring, and simultaneously, the core rod is sleeved with a hollow rod again.
4. The automatic loading and unloading device of the hollow rod cylindrical grinding machine as claimed in claim 3, characterized in that: the heads of the first core rod fastening motor and the second core rod fastening motor are both provided with springs, the core rods are placed between the two springs, and the first core rod fastening motor and the second core rod fastening motor clamp the core rods in a straight line.
5. The automatic loading and unloading device of the hollow rod cylindrical grinding machine as claimed in claim 4, wherein: the upper parts of the first lifting mechanism and the second lifting mechanism are provided with semicircular lifting grooves matched with the excircle of the core rod, and the lifting grooves are suitable for accommodating and lifting the core rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352636.1A CN111002119A (en) | 2019-12-25 | 2019-12-25 | Automatic loading and unloading device of cylindrical grinding machine for hollow bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352636.1A CN111002119A (en) | 2019-12-25 | 2019-12-25 | Automatic loading and unloading device of cylindrical grinding machine for hollow bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111002119A true CN111002119A (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911352636.1A Pending CN111002119A (en) | 2019-12-25 | 2019-12-25 | Automatic loading and unloading device of cylindrical grinding machine for hollow bars |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111002119A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113787453A (en) * | 2021-09-16 | 2021-12-14 | 台州伟立智能设备有限公司 | Plug and socket device for core rod sleeve |
| CN114986297A (en) * | 2022-05-31 | 2022-09-02 | 玉环普天单向器有限公司 | Output shaft periphery polishing equipment and polishing method thereof |
| CN115026651A (en) * | 2022-05-31 | 2022-09-09 | 玉环普天单向器有限公司 | Full-automatic processing system and processing method of output shaft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4136488A (en) * | 1977-08-29 | 1979-01-30 | Ex-Cell-O Corporation | Honing machine |
| CN206561319U (en) * | 2017-03-02 | 2017-10-17 | 嘉兴市中菱机械有限公司 | A kind of automatic blanking device for cylindrical grinder |
| CN109093465A (en) * | 2018-09-17 | 2018-12-28 | 漳州市龙文区丹鸿源机械有限公司 | Hydraulic tappet cylindrical lapping equipment |
| CN110385609A (en) * | 2019-08-09 | 2019-10-29 | 浙江杰克机床股份有限公司 | A kind of self-acting grinding machine for processing cover parts |
-
2019
- 2019-12-25 CN CN201911352636.1A patent/CN111002119A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4136488A (en) * | 1977-08-29 | 1979-01-30 | Ex-Cell-O Corporation | Honing machine |
| CN206561319U (en) * | 2017-03-02 | 2017-10-17 | 嘉兴市中菱机械有限公司 | A kind of automatic blanking device for cylindrical grinder |
| CN109093465A (en) * | 2018-09-17 | 2018-12-28 | 漳州市龙文区丹鸿源机械有限公司 | Hydraulic tappet cylindrical lapping equipment |
| CN110385609A (en) * | 2019-08-09 | 2019-10-29 | 浙江杰克机床股份有限公司 | A kind of self-acting grinding machine for processing cover parts |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113787453A (en) * | 2021-09-16 | 2021-12-14 | 台州伟立智能设备有限公司 | Plug and socket device for core rod sleeve |
| CN114986297A (en) * | 2022-05-31 | 2022-09-02 | 玉环普天单向器有限公司 | Output shaft periphery polishing equipment and polishing method thereof |
| CN115026651A (en) * | 2022-05-31 | 2022-09-09 | 玉环普天单向器有限公司 | Full-automatic processing system and processing method of output shaft |
| CN115026651B (en) * | 2022-05-31 | 2024-03-26 | 玉环普天单向器有限公司 | Full-automatic processing system and processing method of output shaft |
| CN114986297B (en) * | 2022-05-31 | 2024-05-03 | 玉环普天单向器有限公司 | Output shaft periphery polishing equipment and polishing method thereof |
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Application publication date: 20200414 |