CN107097128A - A kind of belt grinding machine for ability of being polished with varied angle - Google Patents
A kind of belt grinding machine for ability of being polished with varied angle Download PDFInfo
- Publication number
- CN107097128A CN107097128A CN201710572060.4A CN201710572060A CN107097128A CN 107097128 A CN107097128 A CN 107097128A CN 201710572060 A CN201710572060 A CN 201710572060A CN 107097128 A CN107097128 A CN 107097128A
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- Prior art keywords
- polishing
- fixed
- sleeve block
- plate
- axle
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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
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
-
- 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
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a kind of belt grinding machine for ability of being polished with varied angle, cylinder is fixed in fixed plate, fixed plate is inlaid with the second copper bush at four angles, second copper bush is placed with the axis of guide, the piston rod of four axis of guides and cylinder is connected with polishing platform floor, first sleeve block, second sleeve block and the 3rd sleeve block are fixed on polishing platform floor, first straight line driver element, second straight line driver element and the 3rd straight spur unit are by being connected in the first joint shaft of afterbody, second joint axle and the 3rd joint shaft and the first sleeve block, second sleeve block and the 3rd sleeve block are hinged, first straight line driver element, the other end of second straight line driver element and the 3rd straight spur unit passes through the first ball joint bearing with polishing plate, second ball joint bearing and the 3rd ball joint bearing are hinged, end polishing plate is fixed on the surface of polishing plate.Present invention reduces the lower deployment cost of whole polishing system so that polishing operation is more flexible.
Description
Technical field
The present invention relates to Sand Band Grinding Technique field, more particularly to a kind of sbrasive belt grinding for ability of being polished with varied angle
Machine.
Background technology
Current grinding and buffing industry is disposing automation equipment to offset the human cost gradually risen.Current machine
Peopleization polishing system is used cooperatively using robot gribing part and belt sander, during in face of complex-curved polishing, and robot needs
Redundancy structure with more than six-freedom degree could complete the task of polishing and motion planning and avoidance, redundancy industrial robot
Not only cost is high but also control is complicated, and selectable model is less in the Industrial Robot Market of maturation.Secondly, it is existing to beat
Some polishing machine equipments do not eject workpiece polishing mechanism in mill equipment, and some have ejection workpiece polishing mechanism, but are only to eject and receive
Two positions are gone back to, the region and position of polishing can not be actively adjusted according to polishing workpiece shapes.
A kind of robot belt grinder is elaborated in the A of patent CN 106514461, including tensioner designs
With dust suction design, the workpiece polishing mechanism of active control.A kind of abrasive band wabbler mechanism is given in patent CN203390697 U, is led to
Cross and wave the rotation that cylinder controls driven roll, the elevating movement of rocking equipment is controlled using telescopic cylinder.Flexible gas in patent
Cylinder is only ejection wabbler mechanism, does not possess the function of actively polishing equally, does not also possess the function of being contacted with flexible workpiece, with
During robot cooperating, flexibility is relatively low.
The content of the invention
The invention aims to solve shortcoming present in prior art, and the one kind proposed has varied angle polishing
The belt grinding machine of ability.
To achieve these goals, present invention employs following technical scheme：
A kind of belt grinding machine for ability of being polished with varied angle, including abrasive band drive mechanism, abrasive band supporting mechanism and varied angle
Workpiece polishing mechanism, the abrasive band drive mechanism drives drive roll by the motor fixed on the base mounting plate, and it is passive that abrasive band bypasses first
Roller, the second driven roll, the 3rd driven roll, the 4th driven roll simultaneously form a closed loop path, the first driven roll, the second quilt with drive roll
Dynamic roller, the 4th driven roll are by bearing hinge connection on base plate and pedestal cover plate；The abrasive band supporting mechanism is by swing rod, gas bullet
Spring, the first copper bush, ball joint bearing and shaft housing connector are constituted, and the 3rd driven roll is hinged on one end of swing rod, swing rod it is another
One end is hinged by the first copper bush with base plate and pedestal cover plate, and axle sleeve is passed through with gas spring in the middle of two pin joints of swing rod
Connector is hinged, and the gas spring other end is hinged with pedestal cover plate by ball joint bearing；The varied angle workpiece polishing mechanism includes gas
Cylinder, cylinder is fixed in fixed plate, and fixed plate is inlaid with the second copper bush at four angles, and the second copper bush is placed with the axis of guide,
The piston rod of four axis of guides and cylinder is connected with polishing platform floor, the first sleeve block, the second sleeve block and the 3rd sleeve block
It is fixed on polishing platform floor, first straight line driver element, second straight line driver element and the 3rd straight spur unit pass through
It is connected in the first joint shaft, second joint axle and the 3rd joint shaft and the first sleeve block, the second sleeve block and the 3rd axle of afterbody
Block set is hinged, first straight line driver element, the other end of second straight line driver element and the 3rd straight spur unit and polishing
Plate is hinged by the first ball joint bearing, the second ball joint bearing and the 3rd ball joint bearing, and end polishing plate is fixed on polishing
The surface of plate.
It is preferred that, the first sleeve block, the second sleeve block and the 3rd sleeve block are fixed on polishing platform floor, three axle sleeves
Seat is on polishing platform floor in equilateral triangle arrangement, the set hole central axis of each sleeve block and equilateral the three of the apex
Angular median perpendicular.
It is preferred that, end polishing plate can according to polishing workpiece shapes change, changed.
It is preferred that, the first sleeve block, the second sleeve block and the 3rd sleeve block and the first joint shaft, second joint axle and the 3rd
Joint shaft coordinates for the axle of single-degree-of-freedom with axle sleeve.
It is preferred that, servomotor in first straight line driver element, second straight line driver element and the 3rd straight spur unit
Be fixed in motor outer, shaft coupling connection servomotor and ball screw, be fixed on screw mandrel shaft block on push rod shell with
Ball screw is hinged, and the both sides in push rod shell stud with side rails, screw and the push rod fixed with screw and side rails formation
Being slidably matched between parallel surface, the end of push rod shell studs with the 3rd copper bush that section is annulus, the part circle of push rod
Arc surface coordinates with the 3rd copper bush, and the inside of push rod studs with internal axle sleeve and is engaged with ball screw, push rod shell and the 3rd
The end of copper bush is fixed by end cap.
It is preferred that, the outline of push rod is that a pair of circular arcs and a pair of planar constitute the relative shape of two D fonts, arc section
Coordinate with the 3rd copper bush formation axle-axle sleeve, linear slide is formed between a pair of planar and side rails and is coordinated.
It is preferred that, varied angle workpiece polishing mechanism integrally can be ejected and drawn by cylinder by the axis of guide and the piston rod of itself
Return.
The present invention propose it is a kind of can be used cooperatively with industry mechanical arm or frock clamp have varied angle polishing
The belt grinding machine of ability, the belt grinding machine has the workpiece polishing mechanism of Three Degree Of Freedom, can servomotor driving
Abrasive band is pressed in by the posture of lower control polishing platform from different directions is polished surface.This sand with ability of actively polishing
When band milling drum and industrial robot coordinate polishing workpiece, it can polish curve form and not need redundant degree of freedom robot
（More than the industrial robot of six-freedom degree）, reduce the lower deployment cost of whole polishing system so that polishing operation is cleverer
It is living, the model of polishing operation can greatly be extended by the posture of adjustment polishing platform and the position of industrial robot and posture
Enclose.
Brief description of the drawings
Fig. 1 is a kind of overall structure figure of the belt grinding machine with varied angle polishing ability of the present invention.
Fig. 2 is a kind of cut-away view of the belt grinding machine with varied angle polishing ability of the present invention.
Fig. 3 is a kind of varied angle sander composition of the belt grinding machine with varied angle polishing ability of the present invention.
Fig. 4 is a kind of belt grinding machine linear motion articulation structure figure for ability of being polished with varied angle of the present invention.
Fig. 5 coordinates for a kind of belt grinding machine with varied angle polishing ability of the present invention with mechanical arm to scheme.
In figure：1- drive rolls；2- base plates；The driven rolls of 3- first；The driven rolls of 4- second；The driven rolls of 5- the 3rd；6- the 4th
Driven roll；7- abrasive bands；8- motor；9- pedestal cover plates；10- swing rods；11- gas springs；The copper bushes of 12- first；13- ball-joint axles
Hold；14- axle sleeve connectors；15- air cylinder fixed plates；16- cylinders；The copper bushes of 17- second；The 18- axis of guides；19- polishing platforms bottom
Plate；20- first straight line driver elements；21- second straight line driver elements；The straight spur units of 22- the 3rd；The sleeve blocks of 23- first；
The joint shafts of 24- first；The ball joint bearings of 25- first；The sleeve blocks of 26- second；27- second joint axles；28- the second ball-joint axles
Hold；The sleeve blocks of 29- the 3rd；The joint shafts of 30- the 3rd；The ball joint bearings of 31- the 3rd；32- polishing plates；33- ends polishing plate；34-
Motor outer；35- servomotors；36- push rod shells；37- shaft couplings；38- screw mandrel shaft blocks；39- ball screws；40- screws；
41- side rails；42- push rods；The copper bushes of 43- the 3rd；44- internal axle sleeves；45- push rod head；46- end caps；47- polishing workpiece；48- works
Industry robot.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.
Embodiment 1：
A kind of belt grinding machine of ability of being polished with varied angle of the present invention, abrasive band drive mechanism is by being fixed on base plate
The driving drive roll 1 of motor 8 on 2 is moved, and drive roll 1 is the encapsulated cylindrical shape roller of aluminium core, and it is oblique that its outer surface is provided with spiral shape
Groove, spiral chute is circumferentially uniform along periphery, the frictional force between increase drive roll and abrasive band.It is passive that abrasive band 7 bypasses first
Roller 3, the second driven roll 4, the 3rd driven roll 5, the 4th driven roll 6 and one closed loop path of formation of drive roll 1, in the band of drive roll 1
Dynamic lower progress closed loop reciprocating motion.First driven roll 3, the second driven roll 4, the 4th driven roll 6 are by bearing hinge connection in base plate 2
On, can freely it rotate.3rd driven roll 5 is by bearing hinge connection in one end of supporting mechanism swing rod 10, the other end of swing rod 10
It is hinged by the first copper bush 12 with base plate 2 and pedestal cover plate 9, and in two pin joint middle parts of swing rod 10 and gas
Spring 11 is hinged by shaft housing connector 14, and the other end of gas spring 11 is hinged jointly with pedestal cover plate 9 by ball joint bearing 13
Resilient support roller mechanism is formed, can be when abrasive band be operated from inside to outside by abrasive belt tightening, with the change of abrasive band stress, the 3rd
A certain degree of floating can occur for driven roll 5 to compensate the change in shape in abrasive band 7.
Reference picture 2 and 3, varied angle workpiece polishing mechanism, fixed plate 15 and pedestal are disposed with the closed area that abrasive band is run
Plate 2 and pedestal cover plate 9 are mutually perpendicular to and use mode connects for screw.Cylinder 16 is fixed in fixed plate 15, and fixed position is fixed plate 15
Geometric center, at four angles of external radiation be inlaid with the second copper bush 17, each copper axle in the geometric center of fixed plate 15
It is placed with the axis of guide 18 in set, piston rod and the polishing platform floor 19 of four axis of guides 18 and cylinder 16 are connected.It is being polished flat
On platform bottom plate 19, it is fixed with and first straight line driver element 20, the straight spur unit 22 of second straight line driver element 21 and the 3rd
The first sleeve block 23, the second sleeve block 26 and the 3rd sleeve block 29 being hinged, three sleeve blocks are configured in equilateral triangle, axle
Cover the central axis in cover for seat hole and the median perpendicular of equilateral triangle.Each straight spur unit passes through the first joint shaft 24,
Two joint shafts 27 and the 3rd joint shaft 30 are respectively articulated with the first sleeve block 23, the second sleeve block 26 and the 3rd sleeve block 29, hinge
There is the rotation of one degree of freedom after connecing.First straight line driver element 20, the linear drives of second straight line driver element 21 and the 3rd
The other end of unit 22 passes through the first ball joint bearing 25, the second ball joint bearing 28 and the 3rd ball joint bearing with polishing plate 32
31 are hinged, and three pin joints still constitute equilateral triangle.End polishing plate 33, end polishing are fixed with the polishing plane of plate 32
Plate 33 can be changed according to the shape difference of polishing workpiece 47.
Reference picture 4, varied angle polishing platform mainly has straight spur unit composition, and straight spur unit is by servomotor 35
It is fixed in motor outer 34, motor outer has external thread rod to couple with the first joint shaft 24.Shaft coupling 37 couples servomotor
35 and ball screw 39, the one end of ball screw 39 is fixed on push rod shell 36 by screw mandrel shaft block 38, in push rod shell 36
Both sides stud with the side rails 41 of nylon material, two relative two parallel planes of formation of side rails 41, ball screw 39
On screw 40 and the faces of push rod 42 and the side rails 41 fixed with screw 40 cooperatively form linear slide and coordinate.Outside push rod 42
Profile is a pair of circular arcs and a pair of planar constitutes the relative shape of two D fonts, and it is circle that the end of push rod shell 36, which studs with section,
3rd copper bush 43 of ring, a part of arc-shaped surface of push rod 42 cooperatively forms support with the inner surface of the 3rd copper bush 43, pushes up
The inside of bar 42 is also lined with internal axle sleeve 44, and internal axle sleeve 44 is engaged with ball screw 39.The end of push rod 42 is fixed with outer spiral shell
Line push rod head 45, the first ball joint bearing 25, the second ball joint bearing 28 and the 3rd ball joint bearing 31 pass through with push rod head 45
Threaded connection.The end of the copper bush 43 of push rod shell 36 and the 3rd has end cap 46 to fix, and prevents internal structure from dropping out.Pass through control
The anglec of rotation of servomotor 35 can just control the extension elongation of push rod 42, in three straight spur units and the polishing He of plate 32
In the mechanism of the composition of plate bottom plate 19 of polishing, it is possible to three degree of freedom of the control polishing plate 32 in itself rectangular coordinate system
Rotate, when rear portion cylinder 16 integrally ejects workpiece polishing mechanism, polishing plate 32 and end polishing plate 33 just can be with different angles
Abrasive band is pressed in by degree is polished the surface of workpiece 47.
It is that a kind of belt grinding machine with varied angle polishing ability coordinates with six degree of freedom industrial machinery arm shown in Fig. 5
Examples of implementation, the clamping polishing workpiece 47 of industrial robot 48 is close to belt sander, and plate 33 is polished in straight line in polishing plate 32 and end
The driving down conversion angle of driver element, and whole mechanism is ejected and is pressed on workpiece in the presence of cylinder 16.
Embodiment 2
Ball screw in Fig. 4 39 and screw 40 are replaced with sliding screw and screw is slided, other parts and annexation are constant,
The belt grinding machine of varied angle polishing ability can equally be constituted.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of belt grinding machine for ability of being polished with varied angle, including abrasive band drive mechanism, abrasive band supporting mechanism and angle
Spend workpiece polishing mechanism, it is characterised in that the abrasive band drive mechanism is by being fixed on base plate（2）On motor（8）Driving is actively
Roller（1）, abrasive band（7）Bypass the first driven roll（3）, the second driven roll（4）, the 3rd driven roll（5）, the 4th driven roll（6）And with
Drive roll（1）Form a closed loop path, the first driven roll（3）, the second driven roll（4）, the 4th driven roll（6）Pass through bearing hinge connection
In base plate（2）With pedestal cover plate（9）On；The abrasive band supporting mechanism is by swing rod（10）, gas spring（11）, the first copper bush
（12）, ball joint bearing（13）And shaft housing connector（14）Constitute, the 3rd driven roll（5）It is hinged on swing rod（10）One end, pendulum
Bar（10）The other end pass through the first copper bush（12）With base plate（2）With pedestal cover plate（9）It is hinged, swing rod（10）Two hinge
With gas spring in the middle of contact（11）Pass through shaft housing connector（14）It is hinged, gas spring（11）The other end and pedestal cover plate（9）Pass through
Ball joint bearing（13）It is hinged；The varied angle workpiece polishing mechanism includes cylinder（16）, cylinder（16）It is fixed on fixed plate（15）On,
Fixed plate（15）The second copper bush is inlaid with four angles（17）, the second copper bush（17）It is placed with the axis of guide（18）, four are led
To axle（18）And cylinder（16）Piston rod with polishing platform floor（19）It is connected, the first sleeve block（23）, the second sleeve block
（26）With the 3rd sleeve block（29）It is fixed on polishing platform floor（19）On, first straight line driver element（20）, second straight line drive
Moving cell（21）With the 3rd straight spur unit（22）By the first joint shaft for being connected in afterbody（24）, second joint axle（27）
With the 3rd joint shaft（30）With the first sleeve block（23）, the second sleeve block（26）With the 3rd sleeve block（29）It is hinged, first is straight
Line driver element（20）, second straight line driver element（21）With the 3rd straight spur unit（22）The other end with polishing plate（32）
Pass through the first ball joint bearing（25）, the second ball joint bearing（28）With the 3rd ball joint bearing（31）It is hinged, end polishing plate
（33）It is fixed on polishing plate（32）Surface.
2. a kind of belt grinding machine of ability of being polished with varied angle according to claim 1, it is characterised in that first axle
Block set（23）, the second sleeve block（26）With the 3rd sleeve block（29）It is fixed on polishing platform floor（19）On, three sleeve blocks exist
Polishing platform floor（19）It is upper to be arranged in equilateral triangle, the set hole central axis of each sleeve block and equilateral the three of the apex
Angular median perpendicular.
3. the belt grinding machine of a kind of ability of being polished with varied angle according to claim 1, it is characterised in that end is beaten
Nog plate（33）Can according to polishing workpiece shapes change, changed.
4. a kind of belt grinding machine of ability of being polished with varied angle according to claim 1, it is characterised in that first axle
Block set（23）, the second sleeve block（26）With the 3rd sleeve block（29）With the first joint shaft（24）, second joint axle（27）With the 3rd
Joint shaft（30）Coordinate for the axle and axle sleeve of single-degree-of-freedom.
5. the belt grinding machine of a kind of ability of being polished with varied angle according to claim 1, it is characterised in that first is straight
Line driver element（20）, second straight line driver element（21）With the 3rd straight spur unit（22）Middle servomotor（35）It is fixed on
Motor outer（34）On, shaft coupling（37）Couple servomotor（35）And ball screw（39）, it is fixed on push rod shell（36）On
Screw mandrel shaft block（38）With ball screw（39）It is hinged, push rod shell（36）Interior both sides stud with side rails（41）, screw
（40）With with screw（40）Fixed push rod（42）With side rails（41）Being slidably matched between the parallel surface of formation, push rod shell
（36）End stud with section be annulus the 3rd copper bush（43）, push rod（42）A part of arc-shaped surface and the 3rd copper bush
（43）Coordinate, push rod（42）Inside stud with internal axle sleeve（44）And and ball screw（39）It is engaged, push rod shell（36）With
Three copper bushes（43）End by end cap（46）It is fixed.
6. a kind of belt grinding machine of ability of being polished with varied angle according to claim 5, it is characterised in that push rod
（42）Outline constitute the relative shape of two D fonts, arc section and the 3rd copper bush for a pair of circular arcs and a pair of planar
（43）Form axle-axle sleeve to coordinate, a pair of planar and side rails（41）Between formed linear slide coordinate.
7. a kind of belt grinding machine of ability of being polished with varied angle according to claim 1, it is characterised in that cylinder
（16）Pass through the axis of guide（18）Varied angle workpiece polishing mechanism integrally can be ejected and retracted with the piston rod of itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572060.4A CN107097128B (en) | 2017-07-13 | 2017-07-13 | Abrasive belt grinding machine with variable-angle grinding capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572060.4A CN107097128B (en) | 2017-07-13 | 2017-07-13 | Abrasive belt grinding machine with variable-angle grinding capacity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107097128A true CN107097128A (en) | 2017-08-29 |
| CN107097128B CN107097128B (en) | 2023-03-28 |
Family
ID=59664156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710572060.4A Active CN107097128B (en) | 2017-07-13 | 2017-07-13 | Abrasive belt grinding machine with variable-angle grinding capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107097128B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108789067A (en) * | 2018-06-05 | 2018-11-13 | 北京电子科技职业学院 | A kind of hand grinding tool |
| CN111922880A (en) * | 2020-09-09 | 2020-11-13 | 昆山欣建群精密工业有限公司 | Burnishing device for parts machining |
| CN112872992A (en) * | 2021-01-11 | 2021-06-01 | 浙江杭机铸造有限公司 | Special grinding device of ironcasting clearance |
| CN114083405A (en) * | 2021-10-25 | 2022-02-25 | 广西电网有限责任公司南宁供电局 | Multipurpose polisher |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108789067A (en) * | 2018-06-05 | 2018-11-13 | 北京电子科技职业学院 | A kind of hand grinding tool |
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| CN111922880A (en) * | 2020-09-09 | 2020-11-13 | 昆山欣建群精密工业有限公司 | Burnishing device for parts machining |
| CN112872992A (en) * | 2021-01-11 | 2021-06-01 | 浙江杭机铸造有限公司 | Special grinding device of ironcasting clearance |
| CN112872992B (en) * | 2021-01-11 | 2022-04-29 | 浙江杭机铸造有限公司 | Special grinding device of ironcasting clearance |
| CN114083405A (en) * | 2021-10-25 | 2022-02-25 | 广西电网有限责任公司南宁供电局 | Multipurpose polisher |
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