CN113732889A - Sapphire seed crystal grinding device - Google Patents
Sapphire seed crystal grinding device Download PDFInfo
- Publication number
- CN113732889A CN113732889A CN202110879089.3A CN202110879089A CN113732889A CN 113732889 A CN113732889 A CN 113732889A CN 202110879089 A CN202110879089 A CN 202110879089A CN 113732889 A CN113732889 A CN 113732889A
- Authority
- CN
- China
- Prior art keywords
- grinding
- water tank
- seed crystal
- dust
- grinding wheel
- 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
- 238000000227 grinding Methods 0.000 title claims abstract description 103
- 239000013078 crystal Substances 0.000 title claims abstract description 72
- 229910052594 sapphire Inorganic materials 0.000 title claims abstract description 24
- 239000010980 sapphire Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000000428 dust Substances 0.000 claims abstract description 56
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 6
- 239000010902 straw Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 6
- 238000005498 polishing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 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
- B24B19/22—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/12—Devices for exhausting mist of oil or coolant; Devices for collecting or recovering materials resulting from grinding or polishing, e.g. of precious metals, precious stones, diamonds or the like
-
- 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
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a sapphire seed crystal grinding device which comprises a water tank, wherein grinding fluid is contained in the water tank, and a dust suction inlet is formed in the water tank; the seed crystal is provided with a groove for fixing the seed crystal rod; the grinding wheel machine is arranged in the water tank, a grinding wheel of the grinding wheel machine is used for grinding seed crystals, when the seed crystals are ground, grinding liquid is immersed into the lower portion of the grinding wheel, and the grinding liquid and dust are thrown into the dust collection inlet through the upper portion of the grinding wheel; dust extraction, dust extraction are equipped with first straw, and the entry of first straw is connected with the dust absorption entry, and dust extraction is used for collecting the grinding dust, filters the air that gets into wherein. The grinding fluid is filled in the water tank, and a part of the grinding wheel can be soaked in the grinding fluid, so that the grinding wheel is wetted, the sapphire seed crystal and the carborundum grinding wheel are protected, the accuracy of seed crystal grinding is improved, and dust and noise pollution are reduced.
Description
Technical Field
The invention relates to the technical field of sapphire production, in particular to a sapphire seed crystal grinding device.
Background
Sapphire is a single crystal of alumina, commonly known as corundum, and belongs to a trigonal system and a hexagonal structure. The crystal lattice structure is unique, the crystal lattice structure is wear-resistant and wind erosion-resistant, the hardness is second to that of diamond, the growth of sapphire needs a seed crystal with a fixed crystal orientation, the quality of the seed crystal is critical to the quality of the whole crystal, so that the seed crystal is required to be absolutely qualified, the seed crystal is selected to be cut and polished from a crystal without crystal boundary, bubbles and low dislocation density, the processed seed crystal needs to be finely ground and annealed, and the seed crystal is required to be accurate in crystal orientation, free from edge breakage, hidden cracking and scratching and mounted on a seed crystal rod. In order to avoid the defects of polycrystal and the like during seeding, seed crystals must be washed bright before seeding. In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: at present, a seed crystal rod is usually polished by using a grinding wheel, dust and noise pollution can be caused, and the real-time shape of the seed crystal is not beneficial to observation due to the interference of the dust, so that an improvement space exists.
Disclosure of Invention
The invention aims to overcome the technical problems and provides a grinding device which can improve the grinding efficiency of seed crystals and avoid dust pollution.
In order to solve the technical problems, the invention adopts the technical scheme that: a sapphire seed crystal grinding apparatus comprising:
the grinding fluid is contained in the water tank, and a dust suction inlet is formed in the water tank; the seed crystal is provided with a groove for fixing the seed crystal rod; the grinding wheel machine is arranged in the water tank, a grinding wheel of the grinding wheel machine is used for grinding seed crystals, when the seed crystals are ground, grinding liquid is immersed into the lower portion of the grinding wheel, and the grinding liquid and dust are thrown into the dust collection inlet through the upper portion of the grinding wheel; dust extraction, dust extraction are equipped with first straw, and the entry of first straw is connected with the dust absorption entry, and dust extraction is used for collecting the grinding dust, filters the air that gets into wherein.
Preferably, the grinding wheel is used for grinding a groove, and the width of the groove is adapted to the thickness of the grinding wheel.
Preferably, the lower part of water tank is equipped with the landing leg, the top of water tank articulates there is the apron, and the middle part of apron is the transparent plate.
Preferably, a plurality of supporting beams are arranged in the middle of the water tank, a first partition plate and a second partition plate which are adjacent to each other are fixedly arranged above the supporting beams, and an opening for enabling the upper part of the grinding wheel to extend out is formed between the first partition plate and the second partition plate.
Preferably, the bottom of the water tank is provided with a second valve, and a water bucket is arranged below the second valve.
Preferably, a water tank is arranged on the second partition plate, a sewer pipe is arranged on the water tank, a first valve is arranged on the sewer pipe, and when the first valve is opened, the grinding fluid in the water tank can flow into the water tank.
Preferably, a glove fixing hole is formed in the front wall of the water tank, and rubber gloves are fixedly connected to the glove fixing hole.
Preferably, an electric cabinet is arranged on the side wall of the water tank, and a start button, a stop button and an emergency stop button are arranged on the electric cabinet.
Preferably, an illuminating lamp is installed in the water tank.
Preferably, the dust suction device is provided with a three-way joint, one port of the three-way joint is communicated with the first suction pipe, and the other port of the three-way joint is used for connecting a second suction pipe.
Compared with the prior art, the invention has the following beneficial effects.
1. The grinding fluid is filled in the water tank, and a part of the grinding wheel can be soaked in the grinding fluid, so that the grinding wheel is wetted, the sapphire seed crystal and the carborundum grinding wheel are protected, and the accuracy of seed crystal grinding is improved. The seed crystal is completely attached to the seed crystal rod by polishing the seed crystal by the grinding wheel, so that the process requirement of sapphire growth can be greatly met, and a proper temperature transfer mode is provided for qualified sapphire growth.
2. The invention greatly improves the seed crystal grinding efficiency by matching the grinder and the dust suction device, does not pollute the surrounding environment, collects dirty water and dust, and intensively treats the dirty water and the dust, thereby protecting operators from being damaged by the dust and improving the seed crystal grinding efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a seed crystal and a seed rod according to an embodiment of the present invention.
FIG. 2 is a schematic view of a seed crystal and a seed rod assembled together according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a sapphire seed crystal polishing apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the water tank with the first partition removed according to an embodiment of the present invention.
In the figure, 1-seed crystal, 2-seed crystal rod, 11-T-shaped head, 12-groove, 21-seed crystal clamping groove, 22-clamping surface, 31-transparent plate, 32-cover plate, 33-hinge, 34-water tank, 35-illuminating lamp, 36-water tank, 37-electric control box, 38-supporting leg, 39-wheel, 40-first clapboard, 41-second clapboard, 42-rubber glove, 43-sewer pipe, 44-water tank, 45-first suction pipe, 46-second suction pipe, 47-bracket, 48-air filter, 49-motor, 50-dust storage tank, 51-dust suction inlet, 52-supporting beam, 53-grinding machine, 54-grinding wheel, 55-first valve, 56-second valve, 57-glove fixation hole, 371-start button, 372-stop button, 373-emergency stop button.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 4, a sapphire seed crystal polishing apparatus according to an embodiment of the present invention includes:
a water tank 34, wherein the water tank 34 is filled with grinding fluid, and the water tank 34 is provided with a dust suction inlet 51; the seed crystal 1, the seed crystal 1 is provided with a groove 12 for fixing with the seed crystal rod 1; a grinder 53 arranged in the water tank 34, wherein a grinding wheel 54 of the grinder 53 is used for grinding the seed crystal 1, when grinding, the lower part of the grinding wheel 54 is immersed in grinding fluid, and the upper part of the grinding wheel 54 throws the grinding fluid and dust into the dust suction inlet 31; the dust collection device is provided with a first suction pipe 45, an inlet of the first suction pipe 45 is connected with a dust collection inlet 51, and the dust collection device is used for collecting grinding dust and filtering air entering the dust collection device.
In this embodiment, the grinding wheel 54 is used to grind the groove 12, and the width of the groove 12 is adapted to the thickness of the grinding wheel 54. The lower end of the seed rod 1 is provided with a seed crystal clamping groove 21, the head of the seed crystal 1 is a T-shaped head 11, the T-shaped head 11 can be embedded into the seed crystal clamping groove 21, and after the seed crystal rod is moved in, a clamping surface 22 of the seed crystal clamping groove 21 is in contact with the groove 12.
A plurality of supporting beams 52 are arranged in the middle of the water tank 34, a first partition plate 40 and a second partition plate 41 which are adjacent to each other are fixedly arranged above the supporting beams 52, and an opening for enabling the upper part of a grinding wheel 54 to extend out is arranged between the first partition plate 40 and the second partition plate 41.
The bottom of the water tank 34 is provided with a second valve 56, and a water tub 44 is provided below the second valve 56. The second valve 56 is used to discharge the waste slurry from the tank 34.
The second partition plate 41 is provided with a water tank 36, the water tank 36 is provided with a sewer pipe 43, the sewer pipe 43 is provided with a first valve 55, and when the first valve 55 is opened, the grinding fluid in the water tank 36 can flow into the water tank 34. The water tank 36 can supplement and replace the slurry in the water tank 34.
The front wall of the water tank 34 is provided with a glove fixing hole 57, and the glove fixing hole 57 is fixedly connected with a rubber glove 42. The rubber gloves 42 provide labor protection to the operator's hands.
An electric cabinet 37 is arranged on the side wall of the water tank 34, and a start button 371, a stop button 372 and an emergency stop button 373 are arranged on the electric cabinet 37. These buttons are used to control the grinder. Install light 35 in the water tank 34, can throw light on to the present situation of polishing.
The dust suction apparatus includes a holder 47, an air filter 48, a motor 49, and a dust storage tank 50. The motor 49 drives the dust-absorbing fan blades to absorb air containing dust, the air is filtered by the air filter 48, and dust residues are collected by the dust storage box 50. The dust suction device is provided with a three-way joint, one port of the three-way joint is communicated with the first suction pipe 45, and the other port of the three-way joint is used for connecting a second suction pipe 46. The first suction pipe 45 and the second suction pipe 46 each use a bellows that is retractable. The second suction pipe 46 can be used in other occasions needing dust collection, and the utilization efficiency of the dust collection device is improved.
When the device is used, the liquid level of the grinding liquid in the water tank 34 is lower than the bottom of the grinding wheel 54, the grinding machine 53 is started, an operator wears the rubber gloves 42, closes the cover plate 32 and turns on the illuminating lamp to grind the side wall of the seed crystal 1 if necessary, so as to grind a groove 12 with a proper size. The upper end of the grinding wheel throws the grinding fluid and the dust towards the dust suction inlet 51, and the dust suction device filters and stores the dust. When the slurry in the tank 34 needs to be emptied, the second valve 56 is opened and the slurry is collected into the water tank 44. When the level of the slurry in the tank 34 is too low to cover the grinding wheel, the first valve 55 is opened to replenish the slurry in the tank 36 into the tank 34. When the grinding wheel needs to be replaced, the first partition plate 40 and the second partition plate 41 may be removed and replaced.
Example two
Wherein the same or corresponding parts as in the first embodiment are given the same reference numerals as in the first embodiment. For the sake of brevity, only the differences between the second embodiment and the first embodiment will be described. In order to reduce the interruption time caused by the replenishment of the grinding fluid, in this embodiment, the second valve 55 is an electromagnetic valve, a control end of the electromagnetic valve is connected with the controller, the controller is further connected with an electromagnetic water level sensor, the electromagnetic water level sensor is arranged at the bottom of the water tank, and when the liquid level of the grinding fluid in the water tank is lower than a set liquid level, the electromagnetic valve opens to replenish the grinding fluid; when the liquid level of the grinding fluid in the water tank reaches the set liquid level, the electromagnetic valve is closed to stop replenishing the grinding fluid. Thus, the number of grinding interruption can be reduced, and the grinding efficiency can be improved.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (10)
1. A sapphire seed crystal grinding device, characterized by comprising:
the grinding fluid is contained in the water tank (34), and a dust suction inlet (51) is formed in the water tank (34);
the seed crystal (1), the seed crystal (1) is provided with a groove (12) for fixing with the seed crystal rod (1);
the grinding wheel (53) is arranged in the water tank (34), a grinding wheel (54) of the grinding wheel (53) is used for grinding the seed crystal (1), when grinding is carried out, grinding liquid is immersed into the lower part of the grinding wheel (54), and the grinding liquid and dust are thrown into the dust suction inlet (31) by the upper part of the grinding wheel (54);
the dust collection device is provided with a first suction pipe (45), an inlet of the first suction pipe (45) is connected with a dust collection inlet (51), and the dust collection device is used for collecting grinding dust and filtering air entering the dust collection device.
2. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: the grinding wheel (54) is used for grinding the groove (12), and the width of the groove (12) is matched with the thickness of the grinding wheel (54).
3. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: supporting legs (38) are arranged below the water tank (34), a cover plate (32) is hinged above the water tank (34), and a transparent plate (31) is arranged in the middle of the cover plate (32).
4. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: a plurality of supporting beams (52) are arranged in the middle of the water tank (34), a first partition plate (40) and a second partition plate (41) which are adjacent to each other are fixedly arranged above the supporting beams (52), and an opening for enabling the upper part of the grinding wheel (54) to extend out is arranged between the first partition plate (40) and the second partition plate (41).
5. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: the bottom of the water tank (34) is provided with a second valve (56), and a water bucket (44) is arranged below the second valve (56).
6. A sapphire seed crystal grinding apparatus as set forth in claim 4, wherein: the water tank (36) is arranged on the second partition plate (41), the sewer pipe (43) is arranged on the water tank (36), the first valve (55) is arranged on the sewer pipe (43), and when the first valve (55) is opened, the grinding fluid in the water tank (36) can flow into the water tank (34).
7. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: the front wall of the water tank (34) is provided with a glove fixing hole (57), and a rubber glove (42) is fixedly connected to the glove fixing hole (57).
8. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: be equipped with on the lateral wall of water tank (34) electric cabinet (37), be equipped with start button (371), stop button (372) and scram button (373) on electric cabinet (37).
9. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: and an illuminating lamp (35) is arranged in the water tank (34).
10. A sapphire seed crystal grinding apparatus as set forth in claim 1, wherein: and a three-way joint is arranged on the dust suction device, one port of the three-way joint is communicated with the first suction pipe (45), and the other port of the three-way joint is used for connecting a second suction pipe (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879089.3A CN113732889A (en) | 2021-08-02 | 2021-08-02 | Sapphire seed crystal grinding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879089.3A CN113732889A (en) | 2021-08-02 | 2021-08-02 | Sapphire seed crystal grinding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113732889A true CN113732889A (en) | 2021-12-03 |
Family
ID=78729816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110879089.3A Pending CN113732889A (en) | 2021-08-02 | 2021-08-02 | Sapphire seed crystal grinding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113732889A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU891399A1 (en) * | 1980-05-08 | 1981-12-23 | Пензенский Политехнический Институт | Method of working articles by abrasive disgs |
| JP2007301687A (en) * | 2006-05-12 | 2007-11-22 | Naoetsu Electronics Co Ltd | Workpiece cutter |
| CN101564830A (en) * | 2009-05-28 | 2009-10-28 | 蒋倩 | Resin craft grinding and polishing process and apparatus thereof |
| JP3158872U (en) * | 2010-01-25 | 2010-04-22 | 株式会社ナサダ | Grinding wheel unit |
| CN204504977U (en) * | 2015-03-17 | 2015-07-29 | 淮南市乐森黑马乐器有限公司 | A kind of polishing machine with dust exhaust apparatus |
| CN207289793U (en) * | 2017-08-11 | 2018-05-01 | 东莞市富强磁业科技有限公司 | A kind of cleaning type neodymium iron boron square blocks wafer lapping machine |
| CN110561273A (en) * | 2019-09-24 | 2019-12-13 | 湖北卓宝建筑节能科技有限公司 | Dust suction device |
| CN211966975U (en) * | 2020-03-05 | 2020-11-20 | 鸡泽县万邦铸造有限公司 | Well lid processing abrasive machine of polishing |
| CN111975614A (en) * | 2020-08-07 | 2020-11-24 | 河南驰筑商贸有限公司 | Polishing equipment for bearing manufacturing |
| CN212420738U (en) * | 2020-06-08 | 2021-01-29 | 佳珩三维科技(太仓)有限公司 | Grinding device is used in processing of resin work piece |
-
2021
- 2021-08-02 CN CN202110879089.3A patent/CN113732889A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU891399A1 (en) * | 1980-05-08 | 1981-12-23 | Пензенский Политехнический Институт | Method of working articles by abrasive disgs |
| JP2007301687A (en) * | 2006-05-12 | 2007-11-22 | Naoetsu Electronics Co Ltd | Workpiece cutter |
| CN101564830A (en) * | 2009-05-28 | 2009-10-28 | 蒋倩 | Resin craft grinding and polishing process and apparatus thereof |
| JP3158872U (en) * | 2010-01-25 | 2010-04-22 | 株式会社ナサダ | Grinding wheel unit |
| CN204504977U (en) * | 2015-03-17 | 2015-07-29 | 淮南市乐森黑马乐器有限公司 | A kind of polishing machine with dust exhaust apparatus |
| CN207289793U (en) * | 2017-08-11 | 2018-05-01 | 东莞市富强磁业科技有限公司 | A kind of cleaning type neodymium iron boron square blocks wafer lapping machine |
| CN110561273A (en) * | 2019-09-24 | 2019-12-13 | 湖北卓宝建筑节能科技有限公司 | Dust suction device |
| CN211966975U (en) * | 2020-03-05 | 2020-11-20 | 鸡泽县万邦铸造有限公司 | Well lid processing abrasive machine of polishing |
| CN212420738U (en) * | 2020-06-08 | 2021-01-29 | 佳珩三维科技(太仓)有限公司 | Grinding device is used in processing of resin work piece |
| CN111975614A (en) * | 2020-08-07 | 2020-11-24 | 河南驰筑商贸有限公司 | Polishing equipment for bearing manufacturing |
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Application publication date: 20211203 |