CN107186575A - A kind of sander - Google Patents
A kind of sander Download PDFInfo
- Publication number
- CN107186575A CN107186575A CN201710592378.9A CN201710592378A CN107186575A CN 107186575 A CN107186575 A CN 107186575A CN 201710592378 A CN201710592378 A CN 201710592378A CN 107186575 A CN107186575 A CN 107186575A
- Authority
- CN
- China
- Prior art keywords
- iron hoop
- electromagnetism iron
- dust
- polishing ring
- polishing
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000000428 dust Substances 0.000 claims abstract description 93
- 238000005498 polishing Methods 0.000 claims abstract description 82
- 229910052742 iron Inorganic materials 0.000 claims abstract description 55
- 239000012212 insulator Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 abstract description 19
- 229910052751 metal Inorganic materials 0.000 abstract description 19
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000010453 quartz Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 230000005389 magnetism Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910001651 emery Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 210000003928 nasal cavity Anatomy 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 208000029257 vision disease Diseases 0.000 description 1
- 230000004393 visual impairment Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
This programme discloses a kind of sander in metal surface treating device field, including grinding wheel, and grinding wheel is connected with the power set for driving it to rotate, and grinding wheel is followed successively by polishing ring and electromagnetism iron hoop from outside to inside, and electromagnetism iron hoop is fixedly connected with the polishing ring;Electromagnetism iron hoop is connected with the control piece for controlling its break-make.Polishing ring and electromagnetism iron hoop that grinding wheel is set to be fixedly connected from outside to inside by this programme;The break-make of electromagnetism iron hoop is controlled by control piece again, absorption and collection of the polishing ring to metallic dust of polishing is realized, it is to avoid substantial amounts of metallic dust is spread in air, the problem of being caused harm to the health of staff.
Description
Technical field
The present invention relates to metal surface treating device field, spy is standby to be related to a kind of sander.
Background technology
Polishing, is one kind of process for modifying surface, refers generally to by rough object(Sand paper containing higher hardness particle
Deng)To change by rubbing a kind of processing method of material surface physical property, main purpose is thick in order to obtain particular surface
Rugosity.It is general to be carried out using electric grinding machine to the sanding and polishing of metal surface.Electric grinding machine is general by protective cover, motor
And grinding wheel(Such as emery wheel)Constitute, in use, driving emery wheel to realize the polishing to product surface by motor.In bruting process
In, because the dust that polishing is produced is spread in atmosphere completely, dust can enter the internal of staff by respiratory tract;By
In metallic dust by organs such as nasal cavity, the upper respiratory tracts, the mucous membrane tissue of human body can be destroyed, causes staff headache head occur
A series of diseases such as dizzy, visual impairment, expiratory dyspnea, neu obstacle, pneumoconiosis.Therefore, when carrying out surface polishing to metal,
The polishing aerial content of dust is reduced, for ensureing that the healthy of staff has important effect.
The content of the invention
The invention is intended to provide a kind of sander, when carrying out surface polishing to metal to solve the sander of prior art,
The problem of dust is spread in atmosphere completely.
A kind of sander in this programme, including grinding wheel, grinding wheel are connected with the power set for driving it to rotate, polishing
Wheel is followed successively by polishing ring and electromagnetism iron hoop from outside to inside, and electromagnetism iron hoop is fixedly connected with the polishing ring;Electromagnetism iron hoop is connected with
Control the control piece of its break-make.
The operation principle of this programme:Power set are provided with, drive grinding wheel to rotate by power set, polishing ring is realized
Polishing to metal surface;Electromagnetism is controlled to be powered by the control piece being connected with electromagnetism iron hoop again;Electromagnet is set to keep magnetic, from
And polishing ring is adsorbed the metallic dust that can be adsorbed by electromagnet under polishing;Then electromagnet is controlled by control piece again
Ring, powers off it, and metallic dust is collected.
The beneficial effect of this programme:Provided with power set and grinding wheel, it can be realized to metal surface by power set
Polishing;And grinding wheel includes the polishing ring and electromagnetism iron hoop being fixedly connected, electromagnetism iron hoop is connected with the control piece for controlling its break-make;
Electromagnetism iron hoop is controlled to be powered by control piece, electromagnetism iron hoop produces magnetic, can make to be fixed on the polishing ring outside it and adsorb
The metallic dust polished, it is to avoid metallic dust is flown away in air, so as to reduce the content of metallic dust in air, drops
The metal powder dust quantity of low staff's suction.Furthermore it is possible to make electromagnet power-off lose magnetism by control piece, then mobile phone is golden
Belong to dust, it is to avoid dust recycling is into air;And the outer wall for ring of polishing reduces metallic dust, it is to avoid in polishing, metal
Dust and particle scratch metal surface in the case where telling effect;Polishing quality to raising metal surface is significant.
Further, at least two pieces insulators uniformly are embedded with the electromagnetism iron hoop, electromagnetism iron hoop is divided into by insulator
More than two sections of electromagnet;The cambered surface direction of the polishing ring is provided with the dust room for being used for storing dust, and dust room at least covers
One section of electromagnet, dust room is arranged on the left side or right side of polishing ring cambered surface.Because electromagnetism iron hoop has been divided equally at least two
Part, electromagnetism iron hoop is controlled by control piece, the part for making it away from the position of dust room remains powered on state, the electromagnet of energization
With magnetic, the adsorbing powder dust that ring of polishing can be polished is rotated on the outer wall of polishing ring;Electromagnetism is controlled by control piece
Iron hoop remains powered off state close to the part of dust room, when polishing ring is adsorbed with the partial turn of dust to the position close to dust
When, because electromagnetism iron hoop is in off-position, the electromagnetism iron hoop of the position loses magnetism, and the metallic dust on polishing ring outer wall falls
Fall in dust room.So, the metallic dust on the one hand avoided under grinding wheel polishing scratches metal;On the other hand the metal made
Dust is just fallen in dust room in grinding wheel rotation process, it is not necessary to which stop collection metallic dust, improves work effect
Rate.
Further, the control piece include PLC and with the insulator quantity identical conductive bar, conductive bar
One end is respectively fixedly connected with the electromagnet, and the other end of conductive bar is connected with cable, and cable is opened provided with its break-make of control
Close, switch is with the PLC by electric signal diconnected, and PLC is used for the opening and closing of controlling switch.Insulator will
Electromagnetism iron hoop is divided into multistage electromagnet;By the opening and closing of PLC controlling switch, realize to electric between conductive bar and electromagnet
The disconnected control of circulation;Plc controllers control the electromagnet of all non-dust room positions to remain powered on state, to realize polishing ring pair
The absorption of metallic dust, it is to avoid metallic dust is escaped;And the electromagnet power-off in dust room loses magnetism, make outside polishing ring
Metallic dust on wall is lost after magnetic force, is dropped into by inertia and Action of Gravity Field in dust room.
Further, the control piece includes conductive bar, resettlement groove of the intrados provided with annular of the electromagnetism iron hoop, peace
Put uniform in groove be rotatably connected to and conductive bar described in the insulator quantity identical, the conduction at the close dust room two ends
The width of bar is less than the width of the insulator, and the width of the conductive bar away from the dust room two ends is more than the insulator
Width.By setting resettlement groove, when electromagnetism iron hoop is rotated, the electromagnet away from dust room can be powered by conductive bar, be obtained
Magnetic, so that the polishing ring energy adsorbing metal dust outside it;The width of conductive bar away from the dust room two ends is more than
The width of the insulator so that the electromagnet away from dust room can obtain electric energy by conductive bar;And due to close to described
The width of the conductive bar at dust room two ends is less than the width of the insulator, after electromagnet is turned in dust room, conductive bar
In the insulator for being fully located at electromagnet both sides, lost magnetism so that electric energy can not be obtained, the metal powder of polishing ring outer wall absorption
Dirt is dropped in dust room.
Further, the electromagnetism iron hoop is fixedly connected with " Π " shape spiral shell with being equipped with polishing ring in screwed hole, screwed hole
Bolt.Electromagnetism iron hoop and polishing ring are fixed together by " Π " shape bolt, when polishing ring serious wear, it is only necessary to more
Change polishing ring;And by " Π " shape bolt, different types of polishing ring can be connected on electromagnetism iron hoop, so as to realize not
With the polishing of roughness requirements;The setting of other screwed hole can also strengthen the stability of bolt and electromagnetism iron hoop and ring of polishing.
Further, the bottom of the dust room is fixedly connected with the division board of arc, and division board is outer to the polishing ring
Wall direction is upwardly extended, and the top of division board is with the outer wall of polishing ring at a distance of 0.01 ~ 1mm.By setting division board, make substantial amounts of
Metallic dust is dropped between division board and dust chamber interior walls, it is to avoid in the case where grinding wheel tells operating, drives metallic dust diffusion
Into air.After electromagnet loses magnetism, metallic dust under the collective effect of inertia and gravity, can in certain radian to
Under drop, by the outer wall of the top of division board and polishing ring at a distance of 0.01 ~ 1mm, more metallic dusts can be made to drop to isolation
Between plate and dust chamber interior walls.
Further, the bottom of the dust room is provided with the hairbrush for dedusting.Further removed by hairbrush outside polishing ring
Dust on wall, helps avoid dust scratch metal surface and enters in air.
Brief description of the drawings
Fig. 1 is a kind of structural representation of sander of the invention;
Fig. 2 is Fig. 1 top view;
Fig. 3 is a kind of another structural representation of sander of the invention;
Fig. 4 is Fig. 3 top view.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference in Figure of description includes:Dust room 1, asynchronous machine 2, polishing ring 3, quartz wedge 4, conductive bar 5, rotating shaft
6th, through hole 7, conducting rod 8, electromagnetism iron hoop 9, resettlement groove 10, screwed hole 11, hairbrush 12, division board 13, discharging opening 14, handle 15,
Battery case 16, support base 17, cable 18, power switch 19, plc controllers 20, demarcation strip 21, worm gear 22, worm screw 23.
Embodiment 1:A kind of sander as shown in Figure 1 and 2, including grinding wheel, grinding wheel are followed successively by polishing ring from outside to inside
3 and electromagnetism iron hoop 9, polishing ring 3 is socketed on electromagnetism iron hoop 9, and the two ends of electromagnetism iron hoop 9 have been fixedly connected with rotating shaft 6, ring of polishing
3 and the two side of electromagnetism iron hoop 9 be equipped with the screwed hole 11 for penetrating wall body, polishing ring 3 and electromagnetism iron hoop 9 utilize " Π " shape bolt
It is attached through screwed hole 11;The other end of first rotating shaft in electromagnetism iron hoop 9 is connected with asynchronous machine 2, electromagnetism iron hoop 9
The second rotating shaft and electromagnetism iron hoop 9 between be provided with bearing, offer in the rotating shaft 6 and set in the through hole 7 through its axis, through hole 7
There are three conductive bars 5;Conductive bar 5 is connected with conducting rod 8, and the other end of conducting rod 8 is connected with power supply, power supply by cable 18
For the battery or external power source in battery case 16;The junction of asynchronous machine 2 and first rotating shaft, the second rotating shaft are away from electromagnetism iron hoop
9 one end is respectively connected with support base 17;The periphery of polishing ring 3 is provided with dust room 1, the seven of the parcel polishing arc surface of ring 3 of dust room 1
/ tetra-, the outer wall of the both sides of dust room 1 is provided with handle 15;Asynchronous machine 2, support base 17 and battery case 16 are arranged at dust
On the bottom surface of room 1;Four pieces of quartz wedges 4 are embedded with electromagnetism iron hoop 9, electromagnetism iron hoop 9 is divided into four sections of electromagnet by quartz wedge 4;
The electromagnet and quartz wedge 4 of the inwall of electromagnetism iron hoop 9 are provided with groove, and each groove constitutes the resettlement groove 10 of annular, three conductive bars 5
It is distributed in the resettlement groove 10 away from the side of dust room 1;The bottom of dust room 1 is fixedly connected with the division board 13 of arc, isolation
The outer wall direction of plate 13 to polishing ring 3 is upwardly extended, and the top of division board 13 is with the outer wall of polishing ring 3 at a distance of 0.01mm(0.01~
1mm), the lower section of division board 13 is provided with the hairbrush 12 contacted with polishing ring 3, and the bottom of division board 13 is provided with breach, close
The wall body bottom of dust room 1 of the side of division board 13 offers discharging opening 14, and discharging opening 14 is provided with blocking.
In use, asynchronous machine 2 drives first rotating shaft 6 to rotate, first rotating shaft 6 drives polishing ring 3 to rotate to metal surface
Polished;It is that conductive bar 5 is powered during polishing, the electromagnet away from division board 13 is powered in the presence of conductive bar 5, has
Magnetic, so that the polishing ring 3 of outside can adsorb the metallic dust polished;When polishing ring 3 carries metallic dust
Enter after dust room 1, the conductive bar 5 of the position is located in quartz wedge 4, and quartz wedge 4 belongs to insulating materials, causes two quartz wedges
Electromagnet between 4 can not obtain power supply, lose magnetism;So that collective effect of the metallic dust of the position in inertia and gravity
Under, to be fallen under certain radian between the wall body of division board 13 and dust room 1, and another part is attached to arc on polishing ring 3
Metallic dust on face is further removed in rotation process by hairbrush 12.When metallic dust is stacked into necessarily in dust room 1
After amount, metallic dust is taken out by discharging opening 14.
Embodiment 2:A kind of sander as described in Fig. 3 ~ 4, including grinding wheel, grinding wheel are followed successively by polishing ring from outside to inside
3 and electromagnetism iron hoop 9, polishing ring 3 is socketed on electromagnetism iron hoop 9, and the two side of polishing ring 3 and electromagnetism iron hoop 9 is equipped with transparent walls
The screwed hole 11 of body, polishing ring 3 and electromagnetism iron hoop 9 utilize " Π " shape bolt to be attached through screwed hole 11;In electromagnetism iron hoop 9
Rotating shaft 6 is fixedly connected with, the two ends of rotating shaft 6 are connected with support base 17, and rotating shaft 6 is provided with the through hole 7 through axis;Electromagnetism iron hoop
Four pieces of quartz wedges 4 are embedded with 9, electromagnetism iron hoop 9 is divided into four sections of electromagnet by quartz wedge 4;The electromagnet of the inwall of electromagnetism iron hoop 9
Groove is provided with quartz wedge 4, each groove is collectively formed to be fixed in the resettlement groove 10 between the resettlement groove 10 of annular, adjacent quartz
Conductive bar 5 is connected with, the other end of conductive bar 5 is connected with conducting rod 8, and conducting rod 8 is connected with power supply by cable 18, and power supply is
Battery or external power source;Cable 18 is provided with power switch 19;The other end of conductive bar 5 passes through and is fixedly connected on rotating shaft 6
In through hole 7;
Worm gear 22 is socketed with rotating shaft 6, worm gear 22 is engaged with worm screw 23, and worm screw 23 is connected with asynchronous machine 2 by shaft coupling;It is different
Step motor 2 and power switch 19 are connected with plc controllers 20 by electric signal(Such as Siemens S7-300/400), plc controls
Device 20 is used for the rotating speed for controlling asynchronous machine 2 and control power switch 19, to control the break-make of each electric current of conductive bar 5;Polishing ring 3
It is externally provided with dust room 1, the right half part of the parcel polishing ring 3 of dust room 1;The outer wall of the both sides of dust room 1 is provided with handle 15, dust
The bottom of room 1 is fixedly connected with the division board 13 of arc, and the outer wall direction of division board 13 to polishing ring 3 is upwardly extended, division board
13 top and the outer wall of polishing ring 3 are at a distance of 1mm(0.01 ~ 1mm), the lower section of division board 13 is provided with to be contacted with polishing ring 3
Hairbrush 12, be fixedly connected with demarcation strip 21 between polishing ring 3 and asynchronous machine 2, the bottom of division board 13 is provided with breach, close
The wall body bottom of dust room 1 of the side of division board 13 offers discharging opening 14, and discharging opening 14 is provided with blocking;Asynchronous machine 2, support base
17th, separating plate and division board 13 are arranged on the bottom surface of dust room 1.
In use, starting asynchronous machine 2, asynchronous machine 2 drives worm screw 23, and worm screw 23 drives worm gear 22, and worm gear 22 drives
Rotating shaft 6, rotating shaft 6 drives connected grinding wheel to polish metal surface.In bruting process, pass through plc controllers
The rotating speed and control power switch 19 of 20 regulation asynchronous machines 2, realize the power on/off of conductive bar 5;Plc controllers 20 are by leading
The number of degrees that electric bar 5 is rotated, when electromagnet is away from dust room 1, electromagnet opens electric current, electromagnet is had magnetic, makes outside
Polishing ring 3 possess magnetic, adsorbing metal dust;After the polishing ring 3 for carrying metallic dust enters dust room 1, electricity is utilized
Source switch 19 breaks the electric current of the position electromagnet, it is lost magnetism, and metallic dust is dropped in dust room 1.
Above-described is only that the known general knowledge such as concrete structure and characteristic is not made herein in embodiments of the invention, scheme
Excessive description., without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these should also be considered as protection scope of the present invention, these are implemented all without the influence present invention
Effect and practical applicability.The scope of protection required by this application should be based on the content of the claims, in specification
Embodiment etc. records the content that can be used for explaining claim.
Claims (7)
1. a kind of sander, including grinding wheel, it is characterised in that grinding wheel is connected with the power set for driving it to rotate, polishing
Wheel is followed successively by polishing ring and electromagnetism iron hoop from outside to inside, and electromagnetism iron hoop is fixedly connected with the polishing ring;Electromagnetism iron hoop is connected with
Control the control piece of its break-make.
2. sander according to claim 1, it is characterised in that:It is uniform in the electromagnetism iron hoop to be embedded with least two pieces absolutely
Electromagnetism iron hoop is divided into more than two sections of electromagnet by edge body, insulator;The cambered surface direction of the polishing ring, which is provided with, to be used to store
The dust room of dust, dust room at least covers one section of electromagnet, and dust room is arranged on the left side or right side of polishing ring cambered surface.
3. sander according to claim 2, it is characterised in that:The control piece include PLC and with it is described absolutely
Edge body quantity identical conductive bar, one end of conductive bar is respectively fixedly connected with the electromagnet, and the other end of conductive bar is connected with
Cable, cable passes through electric signal diconnected, PLC controls provided with the switch for controlling its break-make, switch with the PLC
Device is used for the opening and closing of controlling switch.
4. sander according to claim 2, it is characterised in that:The control piece includes conductive bar, the electromagnetism iron hoop
Resettlement groove of the intrados provided with annular, be uniformly rotatably connected to being led described in the insulator quantity identical in resettlement groove
Electric bar, the width of the insulator is less than close to the width of the conductive bar at the dust room two ends, away from the dust room two ends
Conductive bar width be more than the insulator width.
5. the sander according to claim 3 or 4, it is characterised in that:The electromagnetism iron hoop on polishing ring with being equipped with spiral shell
" Π " shape bolt is fixedly connected with pit, through hole.
6. sander according to claim 5, it is characterised in that:The bottom of the dust room be fixedly connected with arc every
From plate, the outer wall direction of division board to the polishing ring is upwardly extended, the outer wall of the top of division board and polishing ring at a distance of 0.01 ~
1mm。
7. sander according to claim 6, it is characterised in that:The bottom of the dust room is provided with the hair for dedusting
Brush.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710592378.9A CN107186575A (en) | 2017-07-19 | 2017-07-19 | A kind of sander |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710592378.9A CN107186575A (en) | 2017-07-19 | 2017-07-19 | A kind of sander |
Publications (1)
Publication Number | Publication Date |
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CN107186575A true CN107186575A (en) | 2017-09-22 |
Family
ID=59882307
Family Applications (1)
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CN201710592378.9A Pending CN107186575A (en) | 2017-07-19 | 2017-07-19 | A kind of sander |
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Application publication date: 20170922 |