CN111421440A - Guarantee carbon cloth grinding device of turning radian uniformity - Google Patents

Guarantee carbon cloth grinding device of turning radian uniformity Download PDF

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Publication number
CN111421440A
CN111421440A CN202010422612.5A CN202010422612A CN111421440A CN 111421440 A CN111421440 A CN 111421440A CN 202010422612 A CN202010422612 A CN 202010422612A CN 111421440 A CN111421440 A CN 111421440A
Authority
CN
China
Prior art keywords
fixedly arranged
carbon fiber
grinding device
radian
consistency
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.)
Withdrawn
Application number
CN202010422612.5A
Other languages
Chinese (zh)
Inventor
涂桂芝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Huiyu Industrial Co ltd
Original Assignee
Shanghai Huiyu Industrial Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Huiyu Industrial Co ltd filed Critical Shanghai Huiyu Industrial Co ltd
Priority to CN202010422612.5A priority Critical patent/CN111421440A/en
Publication of CN111421440A publication Critical patent/CN111421440A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/02Frames; Beds; Carriages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00Drives or gearings; Equipment therefor
    • B24B47/22Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety 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
    • B24B55/06Dust extraction equipment on grinding or polishing machines

Abstract

The invention provides a carbon fiber cloth polishing device capable of ensuring consistency of radian of corners, which comprises a shell, wherein a first partition plate and a second partition plate are fixedly arranged in the shell, a collecting box is fixedly arranged on the upper side of the first partition plate, a water tank is fixedly arranged on the upper side of the second partition plate, a water pump is fixedly arranged on the upper side of the water tank, a water pipe is fixedly arranged on the upper side of the water pump, an installation part is fixedly arranged at the upper end of the shell, an angle adjusting mechanism is arranged at the front end of the installation part, and a first polishing rod is movably arranged at the upper end of the installation part. Through the cooperation use of angle adjustment mechanism, rotation axis, driving gear, driven gear, first sanding stick, when needs angle regulation, the user passes through turned angle adjustment mechanism, and angle adjustment mechanism drives the driving gear and rotates, and the driving gear is connected through the meshing and is driven gear and rotate, and driven gear drives first sanding stick and rotates to realize angle modulation.

Description

Guarantee carbon cloth grinding device of turning radian uniformity
Technical Field
The invention belongs to the technical field of polishing machinery, and particularly relates to a carbon fiber cloth polishing device capable of ensuring consistency of corner radians.
Background
The carbon fiber cloth is also called carbon fiber cloth, carbon fiber woven cloth, carbon fiber prepreg cloth, carbon fiber reinforced cloth, carbon fiber fabric, carbon fiber tape, carbon fiber sheet (prepreg cloth) and the like, the carbon fiber reinforced cloth is a unidirectional carbon fiber reinforced product and is usually woven by 12K carbon fiber yarns, the carbon fiber cloth is used for tensile strength, shear resistance and earthquake resistance reinforcement of a structural member, the material and matched impregnating adhesive are jointly used to form a carbon fiber composite material, a complete carbon fiber cloth sheet reinforcing system with excellent performance can be formed, and the carbon fiber cloth sheet reinforcing system is suitable for reinforcing engineering for treating increase of use load of buildings, change of engineering use functions, material aging, concrete strength grade lower than a design value, structural crack treatment, repair of service members in severe environments and protection.
Carbon cloth is a novel reinforcement material, research and application in the civil engineering field have obtained rapid development in recent years, when using carbon cloth, need to polish substrate surface comprehensively earlier, there is not any attachment, the fillet is polished to the needs that there is sharp-pointed edges and corners in the position of pasting, and traditional polisher can produce more dust on the substrate surface of polishing, thereby influence the surrounding environment, will cause pollution to the environment to a certain extent, and traditional polisher can't angle of adjustment when polishing edges and corners to it polish, thereby make edges and corners divide and polish incompletely, it polishes to need the staff to carry out the secondary, staff's work burden has not only been increased, and work efficiency has still been reduced.
Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a carbon fiber cloth polishing device that ensures the consistency of the radian of the corner is provided, so as to achieve the purpose of higher practical value.
Disclosure of Invention
In order to solve the technical problems, the invention provides a carbon fiber cloth polishing device for ensuring the consistency of the radian of a corner, which is achieved by the following specific technical means:
a carbon fiber cloth polishing device capable of guaranteeing consistency of corner radian comprises a shell, wherein a first partition plate and a second partition plate are fixedly arranged inside the shell, a collecting box is fixedly arranged on the upper side of the first partition plate, a water tank is fixedly arranged on the upper side of the second partition plate, a water pump is fixedly arranged on the upper side of the water tank, a water pipe is fixedly arranged on the upper side of the water pump, a mounting part is fixedly arranged at the upper end of the shell, an angle adjusting mechanism is arranged at the front end of the mounting part, a first polishing rod is movably arranged at the upper end of the mounting part, a water outlet is fixedly arranged at the upper end of the first polishing rod, a second polishing rod is movably arranged at the left side of the mounting part, polishing mechanisms are fixedly arranged on the outer sides of the surfaces of the first polishing rod and the second polishing rod, a handle is fixedly arranged at the lower end of the shell, the left end fixed mounting of button has connecting rod, spring mechanism, the left end fixed mounting of connecting rod has the mounting panel, the inside at the cavity is connected to the mounting panel, fixedly connected with spring mechanism between button and the cavity, fixed mounting has inductive transducer on the inner wall of cavity.
Further, the left side fixed mounting of casing has the collection funnel, collect the funnel bottom and extend to the casing inside and collecting box effective connection, grinding machanism when the substrate of polishing on the surface, can produce more residue, and the residue drops to in collecting the funnel, falls to collecting the case along collecting the landing of funnel inner wall.
Furthermore, the water outlet is effectively connected with the water tank through a water pipe.
Further, angle adjustment mechanism and the inside rotation axis fixed connection of installation component, fixed mounting has the driving gear on the rotation axis, the driving gear is connected with driven gear through the meshing, driven gear's upper end fixed mounting has first sanding stick, and when needs angle regulation, the user passes through turned angle adjustment mechanism, and angle adjustment mechanism drives the driving gear and rotates, and the driving gear drives driven gear through the meshing connection and rotates, and driven gear drives first sanding stick and rotates to realize the angle modulation.
Furthermore, be provided with the scale between angle adjustment mechanism and the installation component, carry out angle modulation through watching the scale, the accurate angle modulation of being convenient for can not cause too big error to the practicality of equipment has been promoted.
Furthermore, there is the sliding door on the right side of casing through the hinge mechanism movable mounting, fixed mounting has the tab on the sliding door, when needs clearance rubbish and add the water source, opens the sliding door through the pulling tab, and after having cleared up rubbish and having added the water source, will close the sliding door again can, convenient to use.
Furthermore, the surface outer side of the handle is fixedly provided with an anti-slip sleeve, the anti-slip sleeve is arranged on the surface outer side of the handle, so that the user is prevented from being used, the handle is not held tightly due to the fact that hands are wet, workers are injured by the equipment, and the safety of the equipment is improved by the anti-slip sleeve.
Further, the lower extreme fixed mounting of handle has the baffle, can play the promotion and the guard action of certain degree through setting up the baffle, prevents that the staff from causing the equipment accident to drop when using.
Advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
1. through the cooperation use of angle adjustment mechanism, rotation axis, driving gear, driven gear, first sanding stick, when needs angle regulation, the user passes through turned angle adjustment mechanism, and angle adjustment mechanism drives the driving gear and rotates, and the driving gear is connected through the meshing and is driven gear and rotate, and driven gear drives first sanding stick and rotates to realize angle modulation.
2. Through the button, the connecting rod, spring mechanism, the mounting panel, the inductive pick-up, a water pump, a water pipe, the cooperation of delivery port is used, when grinding mechanism is on the substrate surface of polishing, can produce more dust, will cause pollution to the environment to a certain extent, the user is through pressing the button, the button drives the mounting panel through the connecting rod and moves right, the button compresses spring mechanism to the state of tightening simultaneously, the mounting panel removes to bump to the inductive pick-up and stops, the inductive pick-up experiences pressure signal, and can convert pressure signal into the signal of telecommunication of available output according to certain law, transmit on the water pump, the water pump produces kinetic energy and spills water along pipe conveyor to delivery port, thereby make grinding mechanism reduce the dust when the substrate surface of polishing, the practicality of equipment has been promoted.
3. The anti-slip cover is arranged outside the surface of the handle, so that the user is prevented from being held tightly by the handle due to the fact that the hand is wet, workers are injured by equipment, the safety of the equipment is improved by the anti-slip cover, the baffle can play a certain degree of pushing and protecting effects, and the workers are prevented from falling off accidentally when the anti-slip cover is arranged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a schematic view of the handle structure of the present invention;
fig. 5 is a schematic view of the structure of the mounting member of the present invention.
In the figure: 1. a housing; 2. a handle; 3. a baffle plate; 4. an anti-slip sleeve; 5. a button; 6. a collection funnel; 7. a first separator; 8. a second separator; 9. a collection box; 10. a water tank; 11. a water pump; 12. a water pipe; 13. a mounting member; 14. an angle adjusting mechanism; 15. a first sanding bar; 16. a second sanding bar; 17. a polishing mechanism; 18. a water outlet; 19. sliding the door; 20. pulling the button; 21. a rotating shaft; 22. a driving gear; 23. a driven gear; 24. a connecting rod; 25. a spring mechanism; 26. mounting a plate; 27. a cavity; 28. an inductive sensor.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example (b):
as shown in figures 1 to 5:
the invention provides a carbon fiber cloth polishing device capable of ensuring the consistency of corner radians, which comprises a shell 1, wherein a first clapboard 7 and a second clapboard 8 are fixedly arranged in the shell 1, a collecting box 9 is fixedly arranged on the upper side of the first clapboard 7, a water tank 10 is fixedly arranged on the upper side of the second clapboard 8, a water pump 11 is fixedly arranged on the upper side of the water tank 10, a water pipe 12 is fixedly arranged on the upper side of the water pump 11, a mounting part 13 is fixedly arranged at the upper end of the shell 1, an angle adjusting mechanism 14 is arranged at the front end of the mounting part 13, the angle adjusting mechanism 14 is fixedly connected with a rotating shaft 21 in the mounting part 13, a driving gear 22 is fixedly arranged on the rotating shaft 21, the driving gear 22 is connected with a driven gear 23 through meshing, a first polishing rod 15 is fixedly arranged at the upper end of the driven gear 23, when, the angle adjusting mechanism 14 drives the driving gear 22 to rotate, the driving gear 22 drives the driven gear 23 to rotate through meshing connection, the driven gear 23 drives the first polishing rod 15 to rotate, so that angle adjustment is realized, scales are arranged between the angle adjusting mechanism 14 and the mounting part 13, angle adjustment is performed by watching the scales, the accurate angle adjustment is facilitated without causing too large error, so that the practicability of the equipment is improved, the first polishing rod 15 is movably mounted at the upper end of the mounting part 13, the water outlet 18 is fixedly mounted at the upper end of the first polishing rod 15, the water outlet 18 is effectively connected with the water tank 10 through the water pipe 12, the second polishing rod 16 is movably mounted at the left side of the mounting part 13, the polishing mechanisms 17 are fixedly mounted at the outer sides of the surfaces of the first polishing rod 15 and the second polishing rod 16, the handle 2 is fixedly mounted at the lower end of the shell 1, and the anti-skid sleeve 4 is fixedly mounted at, the anti-skidding sleeve 4 is arranged on the outer side of the surface of the handle 2 to prevent a user from being injured by equipment due to the fact that the handle 2 is not held due to the fact that hands are wet, the safety of the equipment is improved by the anti-skidding sleeve 4, the baffle 3 is fixedly arranged at the lower end of the handle 2, the baffle 3 can play a certain role in pushing and protecting to prevent the equipment from falling off accidentally when the anti-skidding sleeve is arranged, the button 5 is arranged on the right side of the handle 2, the connecting rod 24 and the spring mechanism 25 are fixedly arranged at the left end of the button 5, the mounting plate 26 is fixedly arranged at the left end of the connecting rod 24 and connected inside the cavity 27, the spring mechanism 25 is fixedly connected between the button 5 and the cavity 27, the induction sensor 28 is fixedly arranged on the inner wall of the cavity 27, the collecting funnel 6 is fixedly arranged at the left side of the shell 1, the bottom end of the collecting funnel 6 extends to, grinding machanism 17 is when polishing the substrate on the surface, can produce more residue, the residue drops to collecting funnel 6 in, fall to collecting box 9 along collecting funnel 6 inner wall landing, there is sliding door 19 on the right side of casing 1 through the articulated mechanism movable mounting, fixed mounting has tab 20 on the sliding door 19, when needs clearance rubbish and interpolation water source, open sliding door 19 through pulling tab 20, the rubbish of having cleared up is crossed the back with having added the water source, it can to close sliding door 19 again, convenient to use.
The specific use mode and function of the embodiment are as follows:
the working principle is as follows: when the polishing device is used, firstly, the handle 2 is held by hands, the anti-slip sleeve 4 is arranged on the outer side of the surface of the handle 2 to prevent a user from not holding the handle 2 due to the fact that hands are wet, so that workers are injured by equipment, the safety of the equipment is improved by the anti-slip sleeve 4, the baffle 3 can play a role in pushing and protecting the equipment to a certain degree to prevent the workers from accidentally falling off when the polishing device is used, when the angle is required to be adjusted, the user rotates the angle adjusting mechanism 14 to drive the driving gear 22 to rotate, the driving gear 22 drives the driven gear 23 to rotate through meshing connection, the driven gear 23 drives the first polishing rod 15 to rotate, so that the angle adjustment is realized, and meanwhile, when the polishing mechanism 17 is used for polishing the surface of a base material, more dust can be generated, and pollution to the environment to a certain degree can be caused, the user presses the button 5, the button 5 drives the mounting plate 26 to move rightwards through the connecting rod 24, meanwhile, the button 5 compresses the spring mechanism 25 to be in a tightening state, the mounting plate 26 moves to touch the sensing sensor 28 to stop, the sensing sensor 28 senses a pressure signal and can convert the pressure signal into a usable output electric signal according to a certain rule and transmit the usable output electric signal to the water pump 11, the water pump 11 generates kinetic energy to convey water to the water outlet 18 along a pipeline to be sprayed out, so that dust is reduced when the polishing mechanism 17 polishes the surface of a base material, the practicability of the equipment is improved, when the garbage is required to be cleaned and a water source is added, the pull door 19 is opened by pulling the pull buckle 20, and after the garbage is cleaned and the water source is added, the pull door 19 is closed, and the use is convenient; the equipment is simple to operate, fast, efficient, safe and convenient to use.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.

Claims (8)

1. The utility model provides a guarantee carbon cloth grinding device of turning radian uniformity, includes casing (1), its characterized in that: the polishing device is characterized in that a first partition plate (7) and a second partition plate (8) are fixedly arranged inside the shell (1), a collecting box (9) is fixedly arranged on the upper side of the first partition plate (7), a water tank (10) is fixedly arranged on the upper side of the second partition plate (8), a water pump (11) is fixedly arranged on the upper side of the water tank (10), a water pipe (12) is fixedly arranged on the upper side of the water pump (11), a mounting part (13) is fixedly arranged at the upper end of the shell (1), an angle adjusting mechanism (14) is arranged at the front end of the mounting part (13), a first polishing rod (15) is movably arranged at the upper end of the mounting part (13), a water outlet (18) is fixedly arranged at the upper end of the first polishing rod (15), a second polishing rod (16) is movably arranged at the left side of the mounting part (13), and polishing mechanisms (17) are fixedly arranged on the outer sides of the surfaces of the first polishing rod (15, the lower extreme fixed mounting of casing (1) has handle (2), button (5) are installed on the right side of handle (2), the left end fixed mounting of button (5) has connecting rod (24), spring mechanism (25), the left end fixed mounting of connecting rod (24) has mounting panel (26), the inside at cavity (27) is connected in mounting panel (26), fixedly connected with spring mechanism (25) between button (5) and cavity (27), fixed mounting has inductive transducer (28) on the inner wall of cavity (27).
2. The carbon fiber cloth grinding device for ensuring the consistency of the radian of the corner as claimed in claim 1, wherein: the left side fixed mounting of casing (1) has collection funnel (6), collection funnel (6) bottom extends to inside and collecting box (9) effective connection of casing (1).
3. The carbon fiber cloth grinding device for ensuring the consistency of the radian of the corner as claimed in claim 1, wherein: the water outlet (18) is effectively connected with the water tank (10) through a water pipe (12).
4. The carbon fiber cloth grinding device for ensuring the consistency of the radian of the corner as claimed in claim 1, wherein: the angle adjusting mechanism (14) is fixedly connected with a rotating shaft (21) inside the mounting part (13), a driving gear (22) is fixedly mounted on the rotating shaft (21), the driving gear (22) is connected with a driven gear (23) through meshing, and a first sanding rod (15) is fixedly mounted at the upper end of the driven gear (23).
5. The carbon fiber cloth grinding device for ensuring the consistency of the radian of the corner as claimed in claim 1, wherein: scales are arranged between the angle adjusting mechanism (14) and the mounting part (13).
6. The carbon fiber cloth grinding device for ensuring the consistency of the radian of the corner as claimed in claim 1, wherein: the right side of the shell (1) is movably provided with a sliding door (19) through a hinge mechanism, and a pull buckle (20) is fixedly arranged on the sliding door (19).
7. The carbon fiber cloth grinding device for ensuring the consistency of the radian of the corner as claimed in claim 1, wherein: and an anti-slip sleeve (4) is fixedly arranged on the outer side of the surface of the handle (2).
8. The carbon fiber cloth grinding device for ensuring the consistency of the radian of the corner as claimed in claim 1, wherein: the lower end of the handle (2) is fixedly provided with a baffle (3).
CN202010422612.5A 2020-05-19 2020-05-19 Guarantee carbon cloth grinding device of turning radian uniformity Withdrawn CN111421440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010422612.5A CN111421440A (en) 2020-05-19 2020-05-19 Guarantee carbon cloth grinding device of turning radian uniformity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010422612.5A CN111421440A (en) 2020-05-19 2020-05-19 Guarantee carbon cloth grinding device of turning radian uniformity

Publications (1)

Publication Number Publication Date
CN111421440A true CN111421440A (en) 2020-07-17

Family

ID=71551114

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010422612.5A Withdrawn CN111421440A (en) 2020-05-19 2020-05-19 Guarantee carbon cloth grinding device of turning radian uniformity

Country Status (1)

Country Link
CN (1) CN111421440A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2196284A2 (en) * 2008-12-10 2010-06-16 Flex-Elektrowerkzeuge GmbH Handheld cleaning/grinding machine
CN201677214U (en) * 2009-09-28 2010-12-22 张青峰 Wall surface grinding machine
CN102179737A (en) * 2011-03-21 2011-09-14 王晓 Long tube type dry wall mill
CN103862341A (en) * 2014-04-01 2014-06-18 重庆大学 Casting polishing device
CN104044031A (en) * 2014-07-15 2014-09-17 徐祥来 Wall polishing device
CN105058183A (en) * 2015-07-31 2015-11-18 重庆渝发建设有限公司 Device for wall grinding
CN106863085A (en) * 2017-02-17 2017-06-20 马宁 A kind of anti-pollution new-type hand polishing machine
CN206780114U (en) * 2017-06-09 2017-12-22 新昌县羽林街道全顺机械厂 It is a kind of to cool and the polishing machine of replaceable grinding disc
CN207642899U (en) * 2017-11-23 2018-07-24 江门市华陶陶瓷有限公司 It is a kind of to be used for ceramic polished grinding tool

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2196284A2 (en) * 2008-12-10 2010-06-16 Flex-Elektrowerkzeuge GmbH Handheld cleaning/grinding machine
CN201677214U (en) * 2009-09-28 2010-12-22 张青峰 Wall surface grinding machine
CN102179737A (en) * 2011-03-21 2011-09-14 王晓 Long tube type dry wall mill
CN103862341A (en) * 2014-04-01 2014-06-18 重庆大学 Casting polishing device
CN104044031A (en) * 2014-07-15 2014-09-17 徐祥来 Wall polishing device
CN105058183A (en) * 2015-07-31 2015-11-18 重庆渝发建设有限公司 Device for wall grinding
CN106863085A (en) * 2017-02-17 2017-06-20 马宁 A kind of anti-pollution new-type hand polishing machine
CN206780114U (en) * 2017-06-09 2017-12-22 新昌县羽林街道全顺机械厂 It is a kind of to cool and the polishing machine of replaceable grinding disc
CN207642899U (en) * 2017-11-23 2018-07-24 江门市华陶陶瓷有限公司 It is a kind of to be used for ceramic polished grinding tool

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Application publication date: 20200717