CN108926928A - A kind of dust separation and air balance device for station of polishing - Google Patents
A kind of dust separation and air balance device for station of polishing Download PDFInfo
- Publication number
- CN108926928A CN108926928A CN201811023640.9A CN201811023640A CN108926928A CN 108926928 A CN108926928 A CN 108926928A CN 201811023640 A CN201811023640 A CN 201811023640A CN 108926928 A CN108926928 A CN 108926928A
- Authority
- CN
- China
- Prior art keywords
- station
- dust separation
- air
- shaft
- balance device
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 34
- 238000000926 separation method Methods 0.000 title claims abstract description 21
- 238000005498 polishing Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000005192 partition Methods 0.000 claims abstract description 15
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 238000003475 lamination Methods 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a kind of dust separation for station of polishing and air balance devices, including housing, the upper end of the housing is equipped with attachment base, the lower edge position of the attachment base is fixed with the partition of annular, the dust separation and air balance device of this station that is used to polish, structure is simple, it is easy to use, shaft is connected by shaft coupling with the output shaft for station of polishing, it is able to drive grinding head and blade while rotating, blade rotation provides the air pressure risen, so that dust is filtered by the strainer of fluid dividing cover, final realize is collected, housing covers on the outside of grinding head, with certain air-tightness, avoid flying for dust, convenient for collecting, air-flow is sent into from the lower side of housing to center by blower, by the guiding of end ring and inclined plate, the spiral lamination of cooperation partition forms the spiral air flow for stablizing rising, upper boosting with blade is assisted Make, is conducive to carry dust rising, steady air current, good dedusting effect.
Description
Technical field
The present invention relates to dust processing technology field, specially a kind of dust separation and air balance for station of polishing
Device.
Background technique
Enterprise to die-cast product carry out appearance processing when, if you need to surface baking vanish, plating, electricity die-cast product, table
Face should first polish, polish, and sander need to be utilized when grinding and buffing, and conventional bruting machine exist as follows when handling product surface
Problem, sander generally require the air inlet pipe air inlet using 6KG pressure, are then vented, and revolving speed reaches 25000 revs/min, usually
It needs multiple stations to share a set of air inlet pipe, because installation can not be close, cause adsorption effect poor, be easy to produce pollution, simultaneously
Suction is uneven, is also easy to produce turbulent flow and turbulent flow, pick-up performance are bad.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the existing defects, provides a kind of dust separation for station of polishing
And air balance device, structure is simple, and easy to use, cooperation grinding head is installed and used, and the Distance Shortened with buffed surface has
Conducive to the absorption of dust, air-flow is uniform, and fluency is high, and operation is convenient, can effectively solve the problems in background technique.
To achieve the above object, the invention provides the following technical scheme: a kind of dust separation and wind for station of polishing
Balancing device, including housing are measured, the upper end of the housing is equipped with attachment base, and the lower edge position of the attachment base is fixed with ring
The flow distribution plate of vertical direction is distributed in the partition of shape, the medial surface of the housing, and the inside of housing lower end open-mouth is equipped with
The end ring of annular, the upside transition of the attachment base are connected with fluid dividing cover, are equipped with shaft in the axis hole of the fluid dividing cover upper surface,
The upper end of the shaft is equipped with shaft coupling, and the middle part of the shaft passes through mesoporous in the middle part of attachment base, the lower end surface of the shaft
Grinding head is installed, is socketed with axle sleeve, the outside of the axle sleeve on the outside of the shaft between the attachment base and fluid dividing cover upper surface
Face is radially distributed with blade, and the downside of the axle sleeve is equipped with base, and the base passes through strut and attachment base upper surface stationary phase
Even, the upper surface of the fluid dividing cover is equipped with blower, and the outlet end of the blower is equipped with air jet pipe, the lower end of the fluid dividing cover
Face is equipped with connecting tube, and the lower end of the connecting tube is connected with the upper side of housing, is equipped in the middle part of the connecting tube mixed
Flow device, the lower end of the air jet pipe is connected with the side import of flow mixing device, the upper surface of the fluid dividing cover be equipped with mounting base with
PLC controller, the input terminal of the PLC controller are electrically connected with the output end of external power supply, the output end of the PLC controller
It is electrically connected with the input terminal of blower.
As a preferred technical solution of the present invention, the lateral surface lower end of the housing is fixed with side arm, the side arm
Lower end be equipped with ball seat, be equipped with ball in the groove of the ball seat.
As a preferred technical solution of the present invention, the medial surface of the partition is the conical surface, the medial surface of the partition
Equipped with spiral lamination.
As a preferred technical solution of the present invention, the section of the end ring is triangle, the upper skew back of the end ring
Inclined plate is fixed on face.
As a preferred technical solution of the present invention, the open-mouth at fluid dividing cover upper surface edge is equipped with ring cowling, institute
It states ring cowling and is connected by locking stud with fluid dividing cover.
As a preferred technical solution of the present invention, the lower surface of the ring cowling is fixed with fixed link, the fixed link
Lower end surface be equipped with annular strainer.
As a preferred technical solution of the present invention, the middle part side of the shaft is equipped with axle key, the axle sleeve inside
Face position corresponding with axle key is equipped with keyway.
As a preferred technical solution of the present invention, shaft upper end one side is equipped with protrusion, the mounting base side
Face position corresponding with protrusion is equipped with range sensor, the output end of the range sensor and the input terminal of PLC controller
Electrical connection.
As a preferred technical solution of the present invention, attachment base upper surface marginal position is equipped with the overflow of annular
Plate, the medial surface of the overflow plate are inclined-plane.
As a preferred technical solution of the present invention, the flow mixing device includes shell, be equipped on the inside of the shell with it is upper
The connected jet pipe of side ports, the jet pipe are conical pipe.
Compared with prior art, the beneficial effects of the present invention are: the dust separation and air balance of the station that originally is used to polish
Device, structure is simple, easy to use, shaft by shaft coupling with polish station output shaft be connected, be able to drive grinding head with
Blade rotates simultaneously, and blade rotation provides the air pressure risen, so that dust is filtered by the strainer of fluid dividing cover, it is final to realize
Collect, housing covers on the outside of grinding head, there is certain air-tightness, avoid flying for dust, convenient for collecting, by blower from
Air-flow is sent at the lower lateral center of housing, by the guiding of end ring and inclined plate, is cooperated the spiral lamination of partition to be formed and is stablized rising
Spiral air flow cooperates with the upper boosting of blade, is conducive to carry dust rising, steady air current, good dedusting effect.
Detailed description of the invention
Fig. 1 is overall structure of the present invention；
Fig. 2 is the schematic diagram of the section structure of the present invention；
Fig. 3 is structure enlargement diagram at A of the present invention；
Fig. 4 is flow mixing device structural schematic diagram of the present invention.
In figure: 1 housing, 101 side arms, 102 ball seats, 103 balls, 2 attachment bases, 3 partitions, 301 spiral laminations, 4 end ring, 401
Inclined plate, 5 fluid dividing covers, 501 ring cowlings, 502 locking studs, 503 fixed links, 504 strainers, 6 shafts, 601 axle keys, 602 shaft couplings,
603 protrusions, 7 grinding heads, 8 axle sleeves, 9 blades, 10 blowers, 11 air jet pipes, 12 connecting tubes, 13 flow mixing devices, 14 mounting bases, 15PLC
Controller, 16 bases, 17 flow distribution plates, 18 range sensors, 19 shells, 20 jet pipes, 21 overflow plates.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-4, the present invention provides a kind of technical solution: a kind of dust separation and air quantity for station of polishing is flat
Weigh device, including housing 1, and the lateral surface lower end of housing 1 is fixed with side arm 101, and the lower end of side arm 101 is equipped with ball seat 102, ball seat
Ball 103 is equipped in 102 groove, the upper end of housing 1 is equipped with attachment base 2, and 2 upper surface marginal position of attachment base is equipped with annular
Overflow plate 21, the medial surface of overflow plate 21 are inclined-plane, and the lower edge position of attachment base 2 is fixed with the partition 3 of annular, partition 3
Medial surface be the conical surface, the medial surface of partition 3 is equipped with spiral lamination 301, and the flow distribution plate of vertical direction is distributed in the medial surface of housing 1
17, the inside of 1 lower end open-mouth of housing is equipped with the end ring 4 of annular, and the section of end ring 4 is triangle, on the bezel facet of end ring 4
It is fixed with inclined plate 401, the upside transition of attachment base 2 is connected with fluid dividing cover 5, and the open-mouth at 5 upper surface edge of fluid dividing cover is equipped with ring
Lid 501, ring cowling 501 are connected by locking stud 502 with fluid dividing cover 5, and the lower surface of ring cowling 501 is fixed with fixed link 503, fixed
The lower end surface of bar 503 is equipped with the strainer 504 of annular, and shaft 6 is equipped in the axis hole of 5 upper surface of fluid dividing cover, and the upper end of shaft 6 is pacified
Equipped with shaft coupling 602, the middle part of shaft 6 passes through 2 middle part mesoporous of attachment base, and the lower end surface of shaft 6 is equipped with grinding head 7, connects
Axle sleeve 8 is socketed on the outside of shaft 6 between seat 2 and 5 upper surface of fluid dividing cover, the middle part side of shaft 6 is equipped with axle key 601, axle sleeve 8
Medial surface position corresponding with axle key 601 is equipped with keyway, and the lateral surface of axle sleeve 8 is radially distributed with blade 9, and the downside of axle sleeve 8 is set
There is base 16, base 16 is fixedly linked by strut and 2 upper surface of attachment base, and the upper surface of fluid dividing cover 5 is equipped with blower 10, wind
The outlet end of machine 10 is equipped with air jet pipe 11, and the lower end surface of fluid dividing cover 5 is equipped with connecting tube 12, the lower end of connecting tube 12 and housing
1 upper side is connected, and the middle part of connecting tube 12 is equipped with flow mixing device 13, and flow mixing device 13 includes shell 19, sets on the inside of shell 19
Have a jet pipe 20 being connected with upside port, jet pipe 20 is conical pipe, the side of the lower end of air jet pipe 11 and flow mixing device 13 into
Mouth is connected, and the upper surface of fluid dividing cover 5 is equipped with mounting base 14 and PLC controller 15, and 6 upper end one side of shaft is equipped with protrusion 603,
14 side of mounting base is equipped with range sensor 18 with raised 603 corresponding positions, and the output end and PLC of range sensor 18 are controlled
The input terminal of device 15 processed is electrically connected, and the input terminal of PLC controller 15 is electrically connected with the output end of external power supply, PLC controller 15
Output end be electrically connected with the input terminal of blower 10, this for polish station dust separation and air balance device used by
Electronic component is the prior art and is not innovated herein, is no longer repeated herein, and PLC controller 15 uses Siemens
6ES7211-0AA23-0XB0, the dust separation and air balance device of this station that is used to polish, structure is simple, easy to use,
Shaft 6 is connected by shaft coupling 602 with the output shaft for station of polishing, and is able to drive grinding head 7 and blade 9 while being rotated, blade 9
Rotation provides the air pressure risen, so that dust is filtered by the strainer of fluid dividing cover 5, final realize is collected, and housing 1, which covers on, to be beaten
The outside of bistrique 7 has certain air-tightness, avoids flying for dust, convenient for collecting, by blower 10 from the downside of housing 1
It is sent into air-flow to center, by the guiding of end ring 4 and inclined plate 401, the spiral lamination 301 of partition 3 is cooperated to form the spiral shell stablized and risen
Rotational gas flow cooperates with the upper boosting of blade 10, is conducive to carry dust rising, steady air current, good dedusting effect.
When in use: fluid dividing cover 5 and housing 1 are connected by mounting base 14 with the mounting rack of sander, and shaft coupling 602 is passed through
Shaft 6 is set to be connected with the output shaft of sander, sander work belt turn axis 6 and grinding head 7 rotate, and blade 9 is rotated with shaft 6
Low pressure lift is formed, when shaft 6 rotates, the interval of range sensor 18 detects protrusion 603, drives wind by PLC controller 15
Machine 10 works, and air-flow enters flow mixing device 13 along air jet pipe 11 and mixes with the fluid that blade 9 generates, by between partition 3 and housing 1
Chamber, flows to center from edge after the guiding of end ring 4 and inclined plate 401, and cooperation spiral lamination 301 generates upward lift, carries
Dust passes through the mesoporous of attachment base 2, eventually passes through strainer 504 and is filtered.
The configuration of the present invention is simple, easy to use, cooperation grinding head 7 is installed and used, and the Distance Shortened with buffed surface has
Conducive to the absorption of dust, air-flow is uniform, and fluency is high, and operation is convenient, improves work efficiency.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of dust separation and air balance device for station of polishing, including housing (1), it is characterised in that: the cover
The upper end of shell (1) is equipped with attachment base (2), and the lower edge position of the attachment base (2) is fixed with the partition (3) of annular, described
The flow distribution plate (17) of vertical direction is distributed in the medial surface of housing (1), and the inside of housing (1) lower end open-mouth is equipped with annular
End ring (4), the upside transition of the attachment base (2) is connected with fluid dividing cover (5), in the axis hole of fluid dividing cover (5) upper surface
Equipped with shaft (6), the upper end of the shaft (6) is equipped with shaft coupling (602), and the middle part of the shaft (6) passes through attachment base (2)
The lower end surface of middle part mesoporous, the shaft (6) is equipped with grinding head (7), the attachment base (2) and fluid dividing cover (5) upper surface it
Between shaft (6) on the outside of be socketed with axle sleeve (8), the lateral surface of the axle sleeve (8) is radially distributed with blade (9), the axle sleeve (8)
Downside be equipped with base (16), the base (16) is fixedly linked by strut and attachment base (2) upper surface, the fluid dividing cover
(5) upper surface is equipped with blower (10), and the outlet end of the blower (10) is equipped with air jet pipe (11), the fluid dividing cover (5)
Lower end surface be equipped with connecting tube (12), the lower end of the connecting tube (12) is connected with the upper side of housing (1), the connection
It being equipped with flow mixing device (13) in the middle part of pipe (12), the lower end of the air jet pipe (11) is connected with the side import of flow mixing device (13),
The upper surface of the fluid dividing cover (5) is equipped with mounting base (14) and PLC controller (15), the input of the PLC controller (15)
End is electrically connected with the output end of external power supply, and the output end of the PLC controller (15) is electrically connected with the input terminal of blower (10).
2. a kind of dust separation and air balance device for station of polishing according to claim 1, it is characterised in that:
The lateral surface lower end of the housing (1) is fixed with side arm (101), and the lower end of the side arm (101) is equipped with ball seat (102), described
Ball (103) are equipped in the groove of ball seat (102).
3. a kind of dust separation and air balance device for station of polishing according to claim 1, it is characterised in that:
The medial surface of the partition (3) is the conical surface, and the medial surface of the partition (3) is equipped with spiral lamination (301).
4. a kind of dust separation and air balance device for station of polishing according to claim 1, it is characterised in that:
The section of the end ring (4) is triangle, is fixed with inclined plate (401) on the bezel facet of the end ring (4).
5. a kind of dust separation and air balance device for station of polishing according to claim 1, it is characterised in that:
The open-mouth at fluid dividing cover (5) the upper surface edge be equipped with ring cowling (501), the ring cowling (501) by locking stud (502) with
Fluid dividing cover (5) is connected.
6. a kind of dust separation and air balance device for station of polishing according to claim 5, it is characterised in that:
The lower surface of the ring cowling (501) is fixed with fixed link (503), and the lower end surface of the fixed link (503) is equipped with the filter of annular
Net (504).
7. a kind of dust separation and air balance device for station of polishing according to claim 1, it is characterised in that:
The middle part side of the shaft (6) is equipped with axle key (601), and axle sleeve (8) medial surface position corresponding with axle key (601) is equipped with
Keyway.
8. a kind of dust separation and air balance device for station of polishing according to claim 1, it is characterised in that:
Shaft (6) the upper end one side is equipped with raised (603), and mounting base (14) side position corresponding with raised (603) is pacified
Equipped with range sensor (18), the output end of the range sensor (18) is electrically connected with the input terminal of PLC controller (15).
9. a kind of dust separation and air balance device for station of polishing according to claim 1, it is characterised in that:
Attachment base (2) the upper surface marginal position is equipped with the overflow plate (21) of annular, and the medial surface of the overflow plate (21) is inclined-plane.
10. a kind of dust separation and air balance device, feature for station of polishing according to claim 1 exists
In: the flow mixing device (13) includes shell (19), and the jet pipe (20) being connected with upside port is equipped on the inside of the shell (19),
The jet pipe (20) is conical pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811023640.9A CN108926928A (en) | 2018-09-04 | 2018-09-04 | A kind of dust separation and air balance device for station of polishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811023640.9A CN108926928A (en) | 2018-09-04 | 2018-09-04 | A kind of dust separation and air balance device for station of polishing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108926928A true CN108926928A (en) | 2018-12-04 |
Family
ID=64443495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811023640.9A Pending CN108926928A (en) | 2018-09-04 | 2018-09-04 | A kind of dust separation and air balance device for station of polishing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108926928A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977778A (en) * | 2019-12-31 | 2020-04-10 | 中国安全生产科学研究院 | High-efficient collection dirt workstation of polishing |
| CN112792672A (en) * | 2021-02-05 | 2021-05-14 | 胡组新 | Workbench for machining of grinding machine |
| CN113500467A (en) * | 2021-09-09 | 2021-10-15 | 恒迈新材料科技(南通)有限公司 | Temperature compensation anti-deformation grinding machine for polishing edge of PCD cutter |
| CN114100339A (en) * | 2021-11-09 | 2022-03-01 | 徐作元 | Desulfurization and denitrification integrated desulfurization tower |
| CN114535783A (en) * | 2022-04-12 | 2022-05-27 | 国家高速列车青岛技术创新中心 | Laser lens protection device |
| CN114800153A (en) * | 2022-06-27 | 2022-07-29 | 凯瑞电子(诸城)有限公司 | Device for preventing waste material from splashing in metal grinding |
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|---|---|---|---|---|
| CN204843864U (en) * | 2015-07-24 | 2015-12-09 | 苏州云舒新材料科技有限公司 | Sheet metal surface is from breathing in rust cleaning device |
| CN206550829U (en) * | 2017-01-24 | 2017-10-13 | 新云石业（云浮）有限公司 | Automatic mill apparatus |
| CN206982463U (en) * | 2017-07-25 | 2018-02-09 | 临沂天阔铸造有限公司 | A kind of dust separation and air balance device for station of polishing |
-
2018
- 2018-09-04 CN CN201811023640.9A patent/CN108926928A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204843864U (en) * | 2015-07-24 | 2015-12-09 | 苏州云舒新材料科技有限公司 | Sheet metal surface is from breathing in rust cleaning device |
| CN206550829U (en) * | 2017-01-24 | 2017-10-13 | 新云石业（云浮）有限公司 | Automatic mill apparatus |
| CN206982463U (en) * | 2017-07-25 | 2018-02-09 | 临沂天阔铸造有限公司 | A kind of dust separation and air balance device for station of polishing |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977778A (en) * | 2019-12-31 | 2020-04-10 | 中国安全生产科学研究院 | High-efficient collection dirt workstation of polishing |
| CN110977778B (en) * | 2019-12-31 | 2021-06-11 | 中国安全生产科学研究院 | High-efficient collection dirt workstation of polishing |
| CN112792672A (en) * | 2021-02-05 | 2021-05-14 | 胡组新 | Workbench for machining of grinding machine |
| CN112792672B (en) * | 2021-02-05 | 2022-08-19 | 山东宇辰金属制品有限公司 | Workbench for machining of grinding machine |
| CN113500467A (en) * | 2021-09-09 | 2021-10-15 | 恒迈新材料科技(南通)有限公司 | Temperature compensation anti-deformation grinding machine for polishing edge of PCD cutter |
| CN114100339A (en) * | 2021-11-09 | 2022-03-01 | 徐作元 | Desulfurization and denitrification integrated desulfurization tower |
| CN114535783A (en) * | 2022-04-12 | 2022-05-27 | 国家高速列车青岛技术创新中心 | Laser lens protection device |
| CN114535783B (en) * | 2022-04-12 | 2023-11-03 | 国家高速列车青岛技术创新中心 | Laser lens protection device |
| CN114800153A (en) * | 2022-06-27 | 2022-07-29 | 凯瑞电子(诸城)有限公司 | Device for preventing waste material from splashing in metal grinding |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181204 |
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| RJ01 | Rejection of invention patent application after publication |