CN113290474B - Polishing equipment of polishing - Google Patents
Polishing equipment of polishing Download PDFInfo
- Publication number
- CN113290474B CN113290474B CN202110494648.9A CN202110494648A CN113290474B CN 113290474 B CN113290474 B CN 113290474B CN 202110494648 A CN202110494648 A CN 202110494648A CN 113290474 B CN113290474 B CN 113290474B
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- Prior art keywords
- gear
- plate
- bevel gear
- polishing
- support
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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
- B24B27/00—Other grinding machines or devices
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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
- B24B27/00—Other grinding machines or devices
- B24B27/0092—Grinding attachments for lathes or the like
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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
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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
- B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to polishing equipment, in particular to polishing and grinding equipment. The technical problems to be solved are as follows: the polishing and grinding equipment is simple to operate and capable of automatically feeding and grinding. The polishing and grinding equipment comprises a bottom plate, wherein a pressing mechanism is arranged on one side of the bottom plate; the rotating mechanism is arranged on the pressing mechanism; and the motor is arranged on the rotating mechanism. According to the invention, the rotating mechanism is matched with the pressing mechanism, the motor is used for driving the discharging grinding tool to rotate, the first bevel gear drives the grinding piece to move downwards, so that the grinding piece is contacted with an article on the discharging grinding tool, and further the article is ground, and the effects of manually grinding and improving the grinding efficiency are achieved; the sucker is arranged to automatically suck articles, and the push rod drives the sucker to move left and right, so that the sucker automatically conveys the sucked articles to the discharging grinding tool, and the effect of automatic feeding is achieved.
Description
Technical Field
The invention relates to polishing equipment, in particular to polishing and grinding equipment.
Background
Most articles or tools used in life of people are polished, but the articles polished are not very uniform, the time required for polishing is long, the number of articles polished in a day is small, the manual polishing operation is difficult, people are skilled in the polishing tools, long-time practice is required, and the manual feeding and discharging steps are complex after polishing is finished.
In summary, in view of the above-mentioned problems, a polishing and grinding device is designed, which is simple to operate, and can automatically feed and automatically grind.
Disclosure of Invention
In order to overcome the defects that the operation degree of the existing polishing tool is difficult, manual polishing and manual feeding are needed by people, the technical problem to be solved is that: the polishing and grinding equipment is simple to operate and capable of automatically feeding and grinding.
The technical proposal is as follows: a polishing and grinding apparatus comprising:
a pressing mechanism is arranged on one side of the bottom plate;
the rotating mechanism is arranged on the pressing mechanism;
and the motor is arranged on the rotating mechanism.
Further, the depressing mechanism includes:
a supporting frame is arranged on one side of the bottom plate;
the second supporting plate is arranged on the supporting frame;
the lower pressing plate is arranged on the second supporting plate in a sliding manner;
the lower pressing plate is provided with a polishing sheet;
the first supporting block is arranged on the supporting frame;
the second bevel gear is rotationally arranged on the first supporting block;
the first support block is rotatably provided with two first gears which are meshed, and the first gear on the right side is connected with the second bevel gear;
the movable assembly is rotatably arranged between the two first gears and is rotatably connected with the lower pressing plate;
further, the rotation mechanism includes:
the first support plate is arranged on the support frame, and a motor is arranged on the first support plate;
the rotating shaft is arranged on the motor output shaft;
the rotating shaft is provided with a first bevel gear which is meshed with the second bevel gear;
the rotating shaft is provided with a plurality of connecting columns;
and a discharging grinding tool is arranged between the connecting columns.
Further, the device also comprises a round-trip mechanism, wherein the round-trip mechanism comprises:
the second supporting block is arranged on the supporting frame;
the third bevel gear is rotatably arranged on the second supporting block and meshed with the first bevel gear;
the second support block is rotatably provided with a gear lack, and the gear lack is connected with a third bevel gear;
the second gear is rotatably arranged on the second supporting block and is meshed with the gear-missing part;
the bottom plate is provided with a second support column;
the rotating rod is rotatably arranged on the second support column;
a belt is arranged between the rotating rod and the second gear;
the first support column is arranged on the second support column;
the first support column is provided with a first gear, and the rotating rod is connected with the first gear in a rotating way;
the movable teeth are rotatably arranged on the rotating rod, and the movable teeth close to one side of the third bevel gear are meshed with the third gear;
the movable teeth on the other side of the first movable rod are rotatably provided with first movable rods;
the push rod is arranged on the first movable rod;
the lower pressing plate is provided with a positioning plate which is connected with the push rod in a sliding way;
the second movable rod is arranged on the position plate in a sliding manner, the second movable rod is connected with the push rod, an elastic piece is arranged between the second movable rod and the position plate, and the second movable rod slides on the second support column;
the third support column is arranged on the second support column and is matched with the bit plate;
the second movable rod is provided with a sucker.
Further, still include feeding mechanism, feeding mechanism includes:
the material storage frame is arranged on the bottom plate;
the discharging plate is arranged in the material storage frame in a sliding mode;
and springs are arranged between the discharging plate and the material storage frame.
Further, the polishing sheet has a disk shape.
Further, the capacity of the stock frame was 5L.
The invention has the beneficial effects that: 1. according to the invention, the rotating mechanism is matched with the pressing mechanism, the motor is used for driving the discharging grinding tool to rotate, and the first bevel gear drives the grinding piece to move downwards, so that the grinding piece is contacted with an article on the discharging grinding tool, and further the article is ground, and the effects of manually grinding and improving the grinding efficiency are achieved.
2. According to the automatic feeding device, the sucking disc is arranged to automatically suck articles, and the push rod drives the sucking disc to move left and right, so that the sucking disc automatically conveys the sucked articles to the discharging grinding tool, and manual feeding is not needed, and the effect of automatic feeding is achieved.
3. According to the invention, the spring is matched with the discharging plate, so that the spring can jack up the article to be polished on the discharging plate automatically, the sucker can suck the article, and people do not need to place the article under the sucker manually, thereby achieving the effects of convenient operation and reduced manual use.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of a first part of the present invention.
Fig. 3 is a schematic perspective view of a second part of the present invention.
Fig. 4 is a schematic perspective view of a third portion of the present invention.
Fig. 5 is a schematic perspective view of a fourth part of the present invention.
Fig. 6 is a schematic perspective view of a fifth part of the present invention.
Reference numerals: 1_floor, 2_motor, 3_rotating mechanism, 31_first support plate, 32_rotating shaft, 33_first bevel gear, 34_connecting column, 35_blanking grinder, 4_pressing mechanism, 41_second support plate, 42_lower platen, 43_grinding plate, 44_support frame, 45_second bevel gear, 46_first support block, 47_first gear, 49_movable assembly, 5_shuttle mechanism, 51_third bevel gear, 52_second support block, 53_missing gear, 54_second gear, 55_belt, 56_rotating rod, 57_first support column, 58_third gear, 59_movable tooth, 510_first movable rod, 511_second support column, 512_push rod, 513_position plate, 514_second movable rod, 515_third support column, 516_suction cup, 6_feeding mechanism, 61_stock frame, 62_blanking plate, 63_spring.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example 1
1-6, the polishing and grinding device comprises a bottom plate 1, a motor 2, a rotating mechanism 3 and a pressing mechanism 4, wherein the pressing mechanism 4 is arranged on the right side of the bottom plate 1, the rotating mechanism 3 is arranged on the pressing mechanism 4, and the motor 2 is arranged on the rotating mechanism 3.
When people need to polish and polish used articles, the equipment can be used, firstly people place the articles on the rotating mechanism 3, then the motor 2 is started, the rotating mechanism 3 and the pressing mechanism 4 are driven to operate through the motor 2, the pressing mechanism 4 polishes and polishes the articles placed on the rotating mechanism 3, after polishing, people take down the articles from the rotating mechanism 3, and when people do not need to use the equipment, the motor 2 is closed.
The pushing mechanism 4 comprises a second supporting plate 41, a lower pressing plate 42, polishing sheets 43, a supporting frame 44, a second bevel gear 45, a first supporting block 46, a first gear 47 and a movable assembly 49, wherein the supporting frame 44 is arranged on the right side of the bottom plate 1, the second supporting plate 41 is arranged on the right side of the supporting frame 44, the lower pressing plate 42 is arranged on the second supporting plate 41 in a sliding mode, the polishing sheets 43 are arranged at the bottom of the lower pressing plate 42, the first supporting block 46 is arranged on the front side of the supporting frame 44, the second bevel gear 45 is rotatably arranged on the first supporting block 46, the two first gears 47 are meshed, the first gear 47 on the right side is connected with the second bevel gear 45, the movable assembly 49 is rotatably arranged between the two first gears 47, and the movable assembly 49 is rotatably connected with the lower pressing plate 42.
Firstly, people start the motor 2, the motor 2 drives the rotating mechanism 3 to move, the rotating mechanism 3 drives the second bevel gear 45 to rotate, the second bevel gear 45 drives the movable assembly 49 to rotate through the first gear 47, the movable assembly 49 drives the lower pressing plate 42 to move downwards, the lower pressing plate 42 drives the polishing sheet 43 to move downwards, the polishing sheet 43 is in contact with an article on the rotating mechanism 3 and polish, after polishing is finished, the lower pressing plate 42 drives the polishing sheet 43 to move upwards, and when the polishing sheet 43 is separated from the article, people take the article off the rotating mechanism 3.
The rotating mechanism 3 comprises a first supporting plate 31, a rotating shaft 32, a first bevel gear 33, connecting columns 34 and a discharging grinding tool 35, wherein the first supporting plate 31 is arranged on a supporting frame 44, a motor 2 is arranged on the first supporting plate 31, the rotating shaft 32 is arranged on an output shaft of the motor 2, the first bevel gear 33 is arranged on the rotating shaft 32, the first bevel gear 33 is meshed with a second bevel gear 45, a plurality of connecting columns 34 are arranged on the rotating shaft 32, and the discharging grinding tool 35 is arranged between the connecting columns 34.
Firstly, people put the objects to be polished and ground on the discharging grinding tool 35, then the motor 2 is started, the output shaft of the motor 2 drives the rotating shaft 32 to rotate, the rotating shaft 32 drives the first bevel gear 33 and the connecting column 34 to rotate, the connecting column 34 drives the discharging grinding tool 35 and the objects to rotate, the first bevel gear 33 further drives the second bevel gear 45 to rotate, the polishing sheet 43 is convenient to polish the objects, and when people do not need to use the equipment, the motor 2 is closed.
The reciprocating mechanism 5 is further comprised, the reciprocating mechanism 5 comprises a third bevel gear 51, a second supporting block 52, a gear-lack 53, a second gear 54, a belt 55, a rotating rod 56, a first supporting column 57, a third gear 58, a movable tooth 59, a first movable rod 510, a second supporting column 511, a push rod 512, a locating plate 513, a second movable rod 514, a third supporting column 515 and a sucker 516, a second supporting block 52 is arranged at the rear side of the supporting frame 44, the second supporting block 52 is rotatably provided with the third bevel gear 51, the third bevel gear 51 is meshed with the first bevel gear 33, the second supporting block 52 is rotatably provided with the gear-lack 53, the gear-lack 53 is connected with the third bevel gear 51, the second supporting block 52 is rotatably provided with the second gear 54, the second gear 54 is meshed with the gear-lack 53, the second supporting column 511 is arranged at the left side of the bottom plate 1, the second supporting column 511 is provided with the first supporting column 57, the front side of the first support column 57 is provided with a third gear 58, the second support column 511 is rotatably provided with a rotating rod 56, the rotating rod 56 is rotatably connected with the third gear 58, a belt 55 is arranged between the rotating rod 56 and the second gear 54, the rotating rod 56 is rotatably provided with two movable teeth 59, the movable teeth 59 on the right side are meshed with the third gear 58, the movable teeth 59 on the left side are rotatably provided with a first movable rod 510, the first movable rod 510 is rotatably provided with a push rod 512, the lower pressure plate 42 is provided with a position plate 513, the position plate 513 is slidably connected with the push rod 512, the position plate 513 is slidably provided with a second movable rod 514, the second movable rod 514 is connected with the push rod 512, an elastic piece is arranged between the second movable rod 514 and the position plate 513, the second movable rod 514 slides on the second support column 511, the second support column 511 is provided with a third support column 515, the third support column 515 is matched with the position plate 513, the bottom of the right side of the second movable rod 514 is provided with a sucker 516.
Firstly, people put an article below a sucker 516, when a lower pressing plate 42 moves downwards, the lower pressing plate 42 drives a locating plate 513 to move downwards, the locating plate 513 drives a second movable rod 514 to move downwards, the second movable rod 514 drives the sucker 516 to move downwards, when the sucker 516 contacts with the article to be polished, the sucker 516 is sucked by the sucker 516, the second movable rod 514 drives the sucker 516 to move upwards, the first bevel gear 33 rotates, the first bevel gear 33 drives a third bevel gear 51 to rotate, the third bevel gear 51 drives a gear-lack 53 to rotate, when the gear-lack 53 has a tooth part to mesh with a second gear 54, the gear-lack 53 drives the second gear 54 to rotate, the second gear 54 drives a belt 55 to rotate, the belt 55 drives a rotating rod 56 to rotate, the rotating rod 56 drives the movable tooth 59 to rotate, the movable tooth 59 rotates around the third gear 58, the movable tooth 59 drives the first movable rod 510 to rotate, the first movable rod 510 drives the push rod 512 to slide left and right, when the push rod 512 moves rightwards, the push rod 512 drives the second movable rod 514 to move rightwards, at this time, the elastic element is compressed, the second movable rod 514 drives the sucker 516 to move rightwards, so that the sucker 516 conveys the article to the discharging grinder 35, then people manually separates the sucker 516 from the article, the article is ground and polished, then when the sucker 516 is separated from the article, the push rod 512 moves leftwards, the elastic element drives the second movable rod 514 and the sucker 516 to reset, and the steps are repeated, so that uninterrupted conveying of the article can be realized.
Still include feeding mechanism 6, feeding mechanism 6 is including stock frame 61, flitch 62 and spring 63, is equipped with stock frame 61 on the bottom plate 1, and the slip is equipped with flitch 62 in stock frame 61, is equipped with spring 63 between flitch 62 and the stock frame 61.
Firstly, people place the objects to be polished on the discharging plate 62, so that the objects compress the springs 63, when the suction disc 516 moves downwards to be in contact with the objects, the suction disc 516 sucks the objects, when the objects on the suction disc 516 are separated from the rest objects, the springs 63 jack up the rest objects upwards to a point, the objects can always be in contact with the suction disc 516, and when the objects on the discharging plate 62 are processed, the springs 63 are reset.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. A polishing and grinding apparatus, comprising:
a bottom plate (1), wherein a pressing mechanism (4) is arranged on one side of the bottom plate (1);
the rotating mechanism (3) and the pressing mechanism (4) are provided with the rotating mechanism (3);
a motor (2), and a motor (2) is arranged on the rotating mechanism (3);
the pressing mechanism (4) comprises:
a supporting frame (44), wherein one side of the bottom plate (1) is provided with the supporting frame (44);
a second support plate (41), wherein the second support plate (41) is arranged on the support frame (44);
a lower pressing plate (42), wherein the lower pressing plate (42) is arranged on the second supporting plate (41) in a sliding manner;
a polishing sheet (43), wherein the lower pressing plate (42) is provided with the polishing sheet (43);
a first support block (46), wherein the first support block (46) is arranged on the support frame (44);
the second bevel gear (45) is rotatably arranged on the first supporting block (46);
the first gear (47), there are two first gears (47) rotatably on the first supporting block (46), two first gears (47) are meshed, the first gear (47) on the right side is connected with second bevel gear (45);
the movable assembly (49) is rotatably arranged between the two first gears (47), and the movable assembly (49) is rotatably connected with the lower pressing plate (42);
the rotation mechanism (3) comprises:
the first support plate (31) is arranged on the support frame (44), and the motor (2) is arranged on the first support plate (31);
a rotating shaft (32), and a rotating shaft (32) is arranged on an output shaft of the motor (2);
a first bevel gear (33), wherein the rotating shaft (32) is provided with the first bevel gear (33), and the first bevel gear (33) is meshed with the second bevel gear (45);
the connecting columns (34) are arranged on the rotating shaft (32), and a plurality of connecting columns (34) are arranged on the rotating shaft;
the material discharging grinding tool (35) is arranged between the connecting columns (34);
also comprises a reciprocating mechanism (5), wherein the reciprocating mechanism (5) comprises:
the second supporting block (52) is arranged on the supporting frame (44);
the third bevel gear (51), the second support block (52) is rotatably provided with the third bevel gear (51), and the third bevel gear (51) is meshed with the first bevel gear (33);
the gear lack (53) is rotatably arranged on the second supporting block (52), and the gear lack (53) is connected with the third bevel gear (51);
the second gear (54) is rotatably arranged on the second supporting block (52), and the second gear (54) is meshed with the tooth-lacking part of the gear (53);
the second support column (511) is arranged on the bottom plate (1);
a rotating rod (56), wherein the second support column (511) is rotatably provided with the rotating rod (56);
a belt (55), wherein the belt (55) is arranged between the rotating rod (56) and the second gear (54);
the first support column (57) is arranged on the second support column (511);
the third gear (58), the first support column (57) is provided with the third gear (58), and the rotating rod (56) is rotationally connected with the third gear (58);
the movable teeth (59) are rotatably arranged on the rotating rod (56), and the movable teeth (59) close to one side of the third bevel gear (51) are meshed with the third gear (58);
the movable teeth (59) on the other side are rotatably provided with a first movable rod (510);
a push rod (512), wherein the push rod (512) is rotatably arranged on the first movable rod (510);
the lower pressing plate (42) is provided with a positioning plate (513), and the positioning plate (513) is connected with the push rod (512) in a sliding mode;
the second movable rod (514) is arranged on the position plate (513) in a sliding mode, the second movable rod (514) is connected with the push rod (512), an elastic piece is arranged between the second movable rod (514) and the position plate (513), and the second movable rod (514) slides on the second support column (511);
the third support column (515), the second support column (511) is provided with the third support column (515), and the third support column (515) is matched with the position plate (513);
the sucker (516) is arranged on the second movable rod (514), and the sucker (516) is arranged on the second movable rod.
2. A polishing apparatus according to claim 1, further comprising a feeding mechanism (6), the feeding mechanism (6) comprising:
a material storage frame (61), wherein the material storage frame (61) is arranged on the bottom plate (1);
the discharging plate (62) is arranged in the material storage frame (61) in a sliding manner, and the discharging plate (62) is arranged in the material storage frame;
and a spring (63) is arranged between the discharging plate (62) and the material storage frame (61).
3. A polishing apparatus according to claim 2, characterized in that the polishing sheet (43) has a disc shape.
4. A polishing apparatus according to claim 3, characterized in that the stock frame (61) has a capacity of 5L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110494648.9A CN113290474B (en) | 2021-05-07 | 2021-05-07 | Polishing equipment of polishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110494648.9A CN113290474B (en) | 2021-05-07 | 2021-05-07 | Polishing equipment of polishing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113290474A CN113290474A (en) | 2021-08-24 |
| CN113290474B true CN113290474B (en) | 2023-05-09 |
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ID=77320914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110494648.9A Active CN113290474B (en) | 2021-05-07 | 2021-05-07 | Polishing equipment of polishing |
Country Status (1)
| Country | Link |
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| CN (1) | CN113290474B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5239654B2 (en) * | 2008-09-05 | 2013-07-17 | 村田機械株式会社 | Deburring device |
| CN107042465B (en) * | 2017-06-06 | 2018-12-11 | 河北东海特钢集团有限公司 | A kind of hardware tool processing components polissoir |
| CN109877665B (en) * | 2019-04-10 | 2020-01-14 | 燕山大学 | Full-automatic glass grinding machine |
| CN110370135B (en) * | 2019-08-01 | 2020-08-14 | 贺州市金盛新型建材有限公司 | Environment-friendly dedusting abrasive grinding tool for grinding stone |
| CN111922890B (en) * | 2020-08-21 | 2022-06-17 | 新兴县恒骏达不锈钢有限公司 | Stainless steel disc polishing equipment |
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2021
- 2021-05-07 CN CN202110494648.9A patent/CN113290474B/en active Active
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| CN113290474A (en) | 2021-08-24 |
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Effective date of registration: 20230414 Address after: 065600 southwest of lifengxian village, Houyi Town, Yongqing County, Langfang City, Hebei Province Applicant after: HEBEI JINXIN WOOD INDUSTRY Co.,Ltd. Address before: 510530 room 4505, building 4, Zone D, No. 18, Shuixi Changling Road, Luogang street, Luogang District, Guangzhou City, Guangdong Province Applicant before: Yang Dingping |
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