CN216967334U - Zinc-plating almag steel slab band grinding device - Google Patents

Zinc-plating almag steel slab band grinding device Download PDF

Info

Publication number
CN216967334U
CN216967334U CN202220733440.8U CN202220733440U CN216967334U CN 216967334 U CN216967334 U CN 216967334U CN 202220733440 U CN202220733440 U CN 202220733440U CN 216967334 U CN216967334 U CN 216967334U
Authority
CN
China
Prior art keywords
wheel
rod
support frame
polishing
steel plate
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.)
Active
Application number
CN202220733440.8U
Other languages
Chinese (zh)
Inventor
龚建达
章伟兴
杨杰
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.)
WUXI HUAJING NEW MATERIAL CO LTD
Original Assignee
WUXI HUAJING NEW MATERIAL 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 WUXI HUAJING NEW MATERIAL CO LTD filed Critical WUXI HUAJING NEW MATERIAL CO LTD
Priority to CN202220733440.8U priority Critical patent/CN216967334U/en
Application granted granted Critical
Publication of CN216967334U publication Critical patent/CN216967334U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The utility model belongs to the technical field of polishing, in particular to a polishing device for a galvanized aluminum-magnesium alloy steel plate strip, which aims at solving the problems that the friction force between the existing polishing belt and the existing steel plate strip is insufficient and the powder pollutes the environment, and provides the following scheme that the polishing device comprises a polishing machine and an abrasive belt in transmission connection with the surface of the polishing machine, wherein the bottom of the polishing machine is in bolted connection with a support frame, a motor is fixedly arranged inside the support frame, the output end of the motor is welded with a rotating rod, the top end of the surface of the rotating rod is meshed with a driving wheel, the top end of the surface of the driving wheel is hinged with a hinged rod, the right end of the hinged rod is hinged with a movable rod, the motor drives the driving wheel to rotate through the rotating rod, the driving wheel drives the movable rod to rotate in a reciprocating manner through the hinged rod, the movable rod drives a sliding frame to move in a reciprocating manner through a limiting wheel, the sliding frame can tightly attach the abrasive belt to the steel plate strip through a lower pressing wheel, so as to increase the friction force and ensure the polishing effect, the rotating rod can form negative pressure through the dust removing mechanism to generate suction force, and dust is collected.

Description

Zinc-plating almag steel slab band grinding device
Technical Field
The utility model relates to the technical field of polishing, in particular to a polishing device for a galvanized aluminum-magnesium alloy steel plate strip.
Background
The galvanized aluminum-magnesium alloy steel plate strip needs to be subjected to a plurality of working procedures in the production process, wherein a large amount of burrs are formed on the surface of the galvanized aluminum-magnesium alloy steel plate strip, a polishing device is used for polishing, and the polishing device mainly comprises a polishing belt and a power wheel.
But its area of polishing of present grinding device is at the in-process of polishing to galvanized aluminum magnesium alloy steel plate strip, it is effectual that both sides and galvanized aluminum magnesium alloy steel plate strip in close contact with polish often to polish the area, and the middle part on galvanized aluminum magnesium alloy steel plate strip surface is polished the area and is in unsettled state, and frictional force is less between area of polishing and the galvanized aluminum magnesium alloy steel plate strip, influences the effect of polishing, and the in-process of polishing can produce a large amount of powders moreover, and these powders can fly upward everywhere, influence the operation environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects that the friction force between a polishing belt and a steel plate belt is insufficient and powder pollutes the environment in the prior art, and provides a polishing device for a galvanized aluminum-magnesium alloy steel plate belt.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a polishing device for a galvanized aluminum-magnesium alloy steel plate strip comprises a polisher and an abrasive belt connected with the surface of the polisher in a transmission manner, a support frame is bolted at the bottom of the polisher, a motor is fixedly mounted inside the support frame, a rotating rod is welded at the output end of the motor, a transmission wheel is meshed at the top end of the surface of the rotating rod, a hinged rod is hinged at the top end of the surface of the transmission wheel, a movable rod is hinged at the right end of the hinged rod, limiting wheels are slidably connected to two sides of the top end of the surface of the movable rod, a sliding frame connected with the two limiting wheels in a rotating manner is arranged inside the support frame, the surface of the sliding frame is slidably connected with holes in the side surface of the support frame, a lower pressing wheel is rotatably connected to the holes in the top of the surface of the sliding frame, the bottom of the lower pressing wheel is slidably connected with the bottom end inside the abrasive belt, a dust removing mechanism is sleeved on the surface of the rotating rod, and the motor can drive the transmission wheel to rotate through the rotating rod, the drive wheel can drive the movable rod through the hinge rod and rotate in a reciprocating manner, the movable rod can drive the sliding frame to reciprocate through the limiting wheel, the sliding frame can attach the abrasive belt to a steel plate strip through the lower pressing wheel, friction force is increased, the polishing effect is ensured, and the rotating rod can form negative pressure to generate suction through the dust removal mechanism and collect dust.
Preferably, the dust removal mechanism includes action wheel, follower, ratch, flabellum and dust cage, the axle center department of action wheel cup joints with the fixed surface of bull stick, the flank of tooth of action wheel and the flank of tooth meshing of follower, the axle center department of follower cup joints with the right end of ratch is fixed, the flank of tooth of the left side of ratch meshes with the insection of flabellum axle center department, the top of dust cage and the inside board bolt of placing of support frame are connected, the hole on dust cage right side cup joints with the surface rotation of ratch, the axle center department of flabellum is connected with the inside rotation of dust cage, and the bull stick can drive the follower through the action wheel and rotate, and the follower can drive the flabellum through the ratch and rotate in the inside of dust cage to form the negative pressure at the top of dust cage and produce suction, inhale the dust and collect in the dust cage.
Preferably, the top end of the surface of the rotating rod is of a worm structure, the transmission wheel is of a worm gear structure, the axis of the transmission wheel is rotatably connected with the inside of the support frame, the rotating rod and the transmission wheel are in a structure that the rotating rod can be meshed with the transmission wheel, the rotating rod can conveniently drive the transmission wheel to rotate, the transmission wheel and the support plate inside the support frame rotate in a limiting mode, and the transmission wheel can conveniently rotate.
Preferably, the right-hand member downward sloping of hinge bar, the hole of movable rod bottom is articulated with the inside of support frame, and the tilt state of hinge bar makes things convenient for the drive wheel to drive the hinge bar and rotates, makes things convenient for the hinge bar to drive the movable rod and rotates, lets the drive wheel drive movable rod reciprocating motion through the hinge bar, ensures the steady rotation of movable rod, and the movable rod is rotated spacingly by the support frame.
Preferably, the sliding frame is of a square structure, a support rod is integrally processed at the middle end of the right side inside the sliding frame, the axis of the limiting wheel is connected with the support rod of the sliding frame, the top end and the bottom end of two sides of the surface of the sliding frame are arranged in a sliding mode with a sliding hole of the support frame, the sliding frame can move left and right stably, the limiting wheel can drive the support rod to move, the support rod can drive the sliding frame to move left and right in a reciprocating mode, the pressing wheel drives the abrasive belt to cling to the steel plate belt, friction force between the abrasive belt and the steel plate belt is increased, and the rolling pressing wheel can cling to different positions of the steel plate belt through the abrasive belt to rub, so that the polishing effect is ensured.
Preferably, action wheel and follower are conical gear, the left end of ratch is the side tooth gear, and the structure of action wheel and follower lets the action wheel can mesh with the follower, makes things convenient for the action wheel to drive the follower and rotates, and the side tooth gear structure of ratch lets the ratch can mesh with the flabellum, makes things convenient for the ratch to drive the flabellum and rotates, and the axle center department of flabellum sets up the tooth post, and the tooth post is connected with the dust cage, and the tooth post meshes with the ratch.
Has the beneficial effects that: the motor can drive the drive wheel through the bull stick and rotate, the drive wheel can drive the movable rod through the hinge bar and reciprocate, the movable rod can drive balladeur train reciprocating motion through spacing wheel, the balladeur train can be with the abrasive band closely attached steel sheet area through pinch roller down, increase frictional force, ensure the effect of polishing, the bull stick can drive the follower through the action wheel and rotate, the follower can drive the flabellum through the ratch and rotate in the inside of dust cage, thereby form the negative pressure at the top of dust cage and produce suction, collect in inhaling the dust cage.
Drawings
FIG. 1 is a schematic front view structure diagram of a polishing device for a galvanized aluminum-magnesium alloy steel plate strip provided by the utility model;
FIG. 2 is a schematic structural diagram of a driving wheel of the polishing device for a galvanized aluminum-magnesium alloy steel plate strip provided by the utility model;
FIG. 3 is a schematic structural view of a carriage of the polishing device for the galvanized aluminum-magnesium alloy steel plate strip provided by the utility model;
fig. 4 is a schematic perspective view of a movable rod of the polishing device for a galvanized aluminum-magnesium alloy steel plate strip provided by the utility model.
In the figure: 1. a sander; 2. a dust removal mechanism; 21. a driving wheel; 22. a driven wheel; 23. a rack bar; 24. a fan blade; 25. a dust collection cover; 3. an abrasive belt; 4. a support frame; 5. a motor; 6. a rotating rod; 7. a driving wheel; 8. a hinged lever; 9. a movable rod; 10. a limiting wheel; 11. a carriage; 12. and a lower pinch roller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, a polishing device for a galvanized aluminum-magnesium alloy steel plate strip comprises a polishing machine 1 and an abrasive belt 3 in surface transmission connection with the polishing machine 1, the abrasive belt 3 is a mature product on the market, the polishing machine 1 is started, the polishing machine 1 drives the abrasive belt 3 to rotate to polish the steel plate strip, a support frame 4 is bolted at the bottom of the polishing machine 1, a motor 5 is fixedly installed inside the support frame 4, a rotating rod 6 is welded at the output end of the motor 5, the motor 5 can drive the rotating rod 6 to rotate, a transmission wheel 7 is meshed at the top end of the surface of the rotating rod 6, the rotating rod 6 can drive the transmission wheel 7 to rotate by using a worm structure, the top end of the surface of the rotating rod 6 is in a worm structure, the transmission wheel 7 is in a worm gear structure, the axis of the transmission wheel 7 is rotatably connected with the inside of the support frame 4, the rotating rod 6 and the transmission wheel 7 are in a structure, so that the rotating rod 6 can be meshed with the transmission wheel 7, the transmission wheel 7 can be conveniently driven by the rotating rod 6, the transmission wheel 7 is limited with a support plate inside the support frame 4 in a rotating manner, so that the transmission wheel 7 can rotate conveniently, the top end of the surface of the transmission wheel 7 is hinged with a hinged rod 8, the right end of the hinged rod 8 is hinged with a movable rod 9, the transmission wheel 7 can drive the hinged rod 8 to reciprocate leftwards and rightwards, the hinged rod 8 can drive the movable rod 9 to reciprocate, the right end of the hinged rod 8 inclines downwards, a hole at the bottom of the movable rod 9 is hinged with the inside of the support frame 4, the inclined state of the hinged rod 8 is convenient for the transmission wheel 7 to drive the hinged rod 8 to rotate, the hinged rod 8 is convenient for the hinged rod 8 to drive the movable rod 9 to rotate, the transmission wheel 7 drives the movable rod 9 to reciprocate through the hinged rod 8, so that the movable rod 9 can rotate stably, the movable rod 9 is limited by the support frame 4 in a rotating manner, the two sides of the top end of the surface of the movable rod 9 are all connected with limiting wheels 10 in a sliding manner, and a sliding frame 11 rotationally connected with the two limiting wheels 10 is arranged inside the support frame 4, the movable rod 9 can slide in the two limit wheels 10 and drive the two limit wheels 10 to reciprocate left and right, the limit wheels 10 can drive the sliding frame 11 to reciprocate left and right, the sliding frame 11 is in a square structure, a support rod is integrally processed at the middle end of the right side in the sliding frame 11, the axis of the limit wheels 10 is connected with the support rod of the sliding frame 11, the top end and the bottom end of the two sides of the surface of the sliding frame 11 are arranged in a sliding way with the sliding hole of the support frame 4, the sliding frame 11 can move stably left and right, the support rod can drive the sliding frame 11 to reciprocate left and right, the lower pinch roller 12 drives the abrasive belt 3 to cling to the steel plate belt, the friction force between the abrasive belt 3 and the steel plate belt is increased, the rolling lower pinch roller 12 can cling to friction at different positions of the steel plate belt through the abrasive belt 3, the polishing effect is ensured, the surface of the sliding frame 11 is connected with the hole on the side surface of the sliding frame 4, the hole on the top of the surface of the sliding frame 11 is rotatably connected with the lower pinch roller 12, the bottom of a lower pressure wheel 12 is connected with the bottom end inside an abrasive belt 3 in a sliding manner, a sliding frame 11 can drive the lower pressure wheel 12 to reciprocate left and right, the lower pressure wheel 12 can drive the abrasive belt 3 to perform contact friction on different parts of a steel plate belt, the friction force is enhanced, a dust removal mechanism 2 is fixedly sleeved on the surface of a rotating rod 6, the dust removal mechanism 2 is bolted with a support frame 4, the rotating rod 6 can drive the dust removal mechanism 2 to rotate, the dust removal mechanism 2 comprises a driving wheel 21, a driven wheel 22, a toothed bar 23, fan blades 24 and a dust hood 25, the axis of the driving wheel 21 is fixedly sleeved with the surface of the rotating rod 6, the rotating rod 6 can drive the driving wheel 21 to rotate, the tooth surface of the driving wheel 21 is meshed with the tooth surface of the driven wheel 22, the axis of the driven wheel 22 is fixedly sleeved with the right end of the toothed bar 23, the driving wheel 21 can drive the driven wheel 22 to rotate, the toothed bar 23 can drive the driving wheel 21 and the driven wheel 22 to rotate, both are conical gears, the left end of the toothed bar 23 is a side toothed gear, the structure of the driving wheel 21 and the driven wheel 22 enables the driving wheel 21 to be meshed with the driven wheel 22, the driving wheel 21 is convenient to drive the driven wheel 22 to rotate, the side toothed gear structure of the toothed bar 23 enables the toothed bar 23 to be meshed with the fan blades 24, the toothed bar 23 is convenient to drive the fan blades 24 to rotate, the axes of the fan blades 24 are provided with toothed columns which are connected with a dust collection cover 25 and meshed with the toothed bar 23, the left side tooth surface of the toothed bar 23 is meshed with the toothed patterns at the axes of the fan blades 24, the top of the dust collection cover 25 is bolted with a placing plate inside the support frame 4, holes on the right side of the dust collection cover 25 are rotatably sleeved with the surface of the toothed bar 23, the toothed bar 23 can drive the fan blades 24 to rotate, the rotating fan blades 24 blow downwards, so that suction force is generated by the top end inside the dust collection cover 25 in a negative pressure state to suck air and dust in the dust collection cover 25 and enter a filter box at the bottom of the dust collection cover 25, the dust is collected by the filter box, the air can be discharged, the axle center of the fan blade 24 is rotatably connected with the inside of the dust hood 25, the rotating rod 6 can drive the driven wheel 22 to rotate through the driving wheel 21, the driven wheel 22 can drive the fan blade 24 to rotate inside the dust hood 25 through the rack bar 23, so that negative pressure is formed at the top of the dust hood 25 to generate suction force, the dust is sucked into the dust hood 25 to be collected, the motor 5 can drive the driving wheel 7 to rotate through the rotating rod 6, the driving wheel 7 can drive the movable rod 9 to rotate in a reciprocating mode through the hinged rod 8, the movable rod 9 can drive the sliding frame 11 to move in a reciprocating mode through the limiting wheel 10, the sliding frame 11 can enable the abrasive belt 3 to be attached to a steel plate strip through the lower pressing wheel 12, friction force is increased, the polishing effect is ensured, the rotating rod 6 can form negative pressure through the dust removal mechanism 2 to generate suction force, and the dust is collected.
The working principle is as follows: the steel plate strip is placed on a placing plate in a support frame 4, a grinding machine 1 is started, the grinding machine 1 drives an abrasive belt 3 to rotate to grind the steel plate strip, a power supply of a motor 5 is switched on, the motor 5 can drive a rotating rod 6 to rotate, the rotating rod 6 can drive a driving wheel 7 to rotate clockwise by utilizing a worm structure, the driving wheel 7 can drive a hinge rod 8 to move rightwards and leftwards at first, the hinge rod 8 can drive a movable rod 9 to reciprocate, the movable rod 9 can slide in two limiting wheels 10 and drive the two limiting wheels 10 to reciprocate leftwards and rightwards, the limiting wheels 10 can drive a sliding frame 11 to reciprocate leftwards and rightwards, the sliding frame 11 can drive a lower pressing wheel 12 to reciprocate leftwards and rightwards, the lower pressing wheel 12 can drive the abrasive belt 3 to perform contact friction on different parts of the steel plate strip, the friction force is enhanced, meanwhile, the rotating rod 6 can drive a driving wheel 21 to rotate, the driving wheel 21 can drive the driven wheel 22 to rotate, the driven wheel 22 can drive the rack bar 23 to rotate, the rack bar 23 can drive the fan blades 24 to rotate, and the rotating fan blades 24 blow air downwards, so that a negative pressure state is formed at the top end inside the dust collection cover 25 to generate suction force to suck air and dust in the air into the dust collection cover 25 and enter a filter box at the bottom of the dust collection cover 25, the dust is collected by the filter box, and the air can be discharged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims (6)

1. The utility model provides a zinc-plated almag steel slab band grinding device, includes abrasive band (3) that polisher (1) and polisher (1) surface drive are connected, its characterized in that, the bottom of polisher (1) is bolted and is had support frame (4), the inside fixed mounting of support frame (4) has motor (5), the output welding of motor (5) has bull stick (6), the top meshing on bull stick (6) surface has drive wheel (7), the top on drive wheel (7) surface articulates there is hinge bar (8), the right-hand member of hinge bar (8) articulates there is movable rod (9), the equal sliding connection in both sides on movable rod (9) surface top has spacing wheel (10), the inside of support frame (4) is provided with carriage (11) of being connected with two spacing wheel (10) rotations, the surface of carriage (11) and the hole sliding connection of support frame (4) side, the hole at the top of the surface of the sliding frame (11) is rotatably connected with a lower pressing wheel (12), the bottom of the lower pressing wheel (12) is in sliding connection with the bottom end inside the abrasive belt (3), and the surface of the rotating rod (6) is fixedly sleeved with a dust removal mechanism (2).
2. The polishing device for the galvanized aluminum-magnesium alloy steel plate strip according to claim 1, the dust removing mechanism (2) comprises a driving wheel (21), a driven wheel (22), a rack bar (23), fan blades (24) and a dust collecting cover (25), the axis of the driving wheel (21) is fixedly sleeved with the surface of the rotating rod (6), the tooth surface of the driving wheel (21) is meshed with the tooth surface of the driven wheel (22), the axle center of the driven wheel (22) is fixedly sleeved with the right end of the rack bar (23), the tooth surface on the left side of the rack bar (23) is meshed with the insections at the axle center of the fan blades (24), the top of the dust collection cover (25) is bolted with a placing plate in the support frame (4), the hole at the right side of the dust collection cover (25) is rotatably sleeved with the surface of the toothed bar (23), the axis of the fan blade (24) is rotatably connected with the inside of the dust collection cover (25).
3. The polishing device for the galvanized aluminum-magnesium alloy steel plate strip according to claim 1, wherein the top end of the surface of the rotating rod (6) is of a worm structure, the transmission wheel (7) is of a worm gear structure, and the axis of the transmission wheel (7) is rotatably connected with the inside of the support frame (4).
4. The plate strip polishing device for the galvanized aluminum magnesium alloy steel plates and strips as claimed in claim 1, wherein the right end of the hinged rod (8) is inclined downwards, and the hole at the bottom of the movable rod (9) is hinged with the inside of the support frame (4).
5. The device for polishing the galvanized aluminum-magnesium alloy steel plate strip according to claim 1, wherein the sliding frame (11) is of a square structure, a supporting rod is integrally machined at the middle end of the right side inside the sliding frame (11), and the axis of the limiting wheel (10) is connected with the supporting rod of the sliding frame (11).
6. The polishing device for the galvanized aluminum-magnesium alloy steel plate strip as claimed in claim 2, wherein the driving wheel (21) and the driven wheel (22) are both bevel gears, and the left end of the rack bar (23) is a side gear.
CN202220733440.8U 2022-03-30 2022-03-30 Zinc-plating almag steel slab band grinding device Active CN216967334U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220733440.8U CN216967334U (en) 2022-03-30 2022-03-30 Zinc-plating almag steel slab band grinding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220733440.8U CN216967334U (en) 2022-03-30 2022-03-30 Zinc-plating almag steel slab band grinding device

Publications (1)

Publication Number Publication Date
CN216967334U true CN216967334U (en) 2022-07-15

Family

ID=82340251

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220733440.8U Active CN216967334U (en) 2022-03-30 2022-03-30 Zinc-plating almag steel slab band grinding device

Country Status (1)

Country Link
CN (1) CN216967334U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115229571A (en) * 2022-08-02 2022-10-25 王儆轩 Grinding mechanism and grinding method for producing motor shell

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115229571A (en) * 2022-08-02 2022-10-25 王儆轩 Grinding mechanism and grinding method for producing motor shell
CN115229571B (en) * 2022-08-02 2024-01-09 国网甘肃省电力公司临夏供电公司 A grinding mechanism and grinding method for motor casing production

Similar Documents

Publication Publication Date Title
CN216967334U (en) Zinc-plating almag steel slab band grinding device
CN217122797U (en) Dustless polishing equipment in metal product surface
CN114750035A (en) Polishing device and polishing method for metal part machining
CN113770843A (en) Rapid deburring device and method for steel balls
CN221496348U (en) Piece collection device of foam engraver
CN214237668U (en) Production of industry stainless steel pipe is with burnishing machine that has dust collection structure
CN219682681U (en) Rolling forming device
CN110977647A (en) Grinding processing equipment for aluminum sheet production
CN216657331U (en) Grinding device for tapered roller convenient to collect waste material
CN213289935U (en) Waste recovery device for machining in mechanical field
CN213136261U (en) External grinding device for forged piece
CN213673305U (en) A kind of welding seam processing mechanism of high frequency straight seam welded pipe
CN213498597U (en) Manual sand blasting machine suitable for optical lens production
CN213225538U (en) Vertical grinding machine with inhale bits structure
CN220007239U (en) Dust keeper for burnishing machine
CN114074277A (en) A kind of grinding device and processing method for aluminum alloy processing
CN212706061U (en) Page wheel polishing and derusting device with adjusting function
CN113997151A (en) Sheet metal surface integrated processing all-in-one
CN219853849U (en) Board surface cleaning and polishing device for plate mill
CN219967597U (en) Grinding wheel dressing mechanism of bearing ring grinding machine
CN215789040U (en) Burnishing machine is used in laser cutting processing
CN220699183U (en) Sand paper rust cleaning grinding device
CN218837241U (en) A metal processing and grinding machine
CN218503999U (en) Numerical control machine tool for producing half shafts
CN112405283A (en) Manual rust cleaning device of adjustable

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant