CN102554810B - Anti-deformation special-shaped grinding wheel - Google Patents
Anti-deformation special-shaped grinding wheel Download PDFInfo
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- CN102554810B CN102554810B CN201210013303.8A CN201210013303A CN102554810B CN 102554810 B CN102554810 B CN 102554810B CN 201210013303 A CN201210013303 A CN 201210013303A CN 102554810 B CN102554810 B CN 102554810B
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Abstract
The invention discloses an anti-deformation special-shaped grinding wheel which comprises a base body and a grinding ring. Hollowed non-entity machining zones which do not participate in grinding are uniformly distributed on the special-shaped grinding surface of the grinding ring, and the other parts are served as entity machining zones which participate in grinding; the total circumferential line length of the entity machining zones at different axial positions corresponds to the machining allowance of parts to be machined at the same position, and the corresponding relation is direct proportion relation or similar to direct proportion relation, so that an equiform wearing structure of the special-shaped grinding surface is formed; a flow channel is manufactured inside the base body to be communicated with the non-entity machining zones; cooling water is injected into the base body through a water inlet of the base body and is applied to a grinding contact surface zone through the flow channel, so that an comprehensive cooling system which can ensure that a plurality of common external cooling type equipment can be conveniently converted into internal cooling type equipment is formed. The grinding wheel has the advantages that the deformation of the special-shaped grinding surface is small when the grinding wheel is operated, rapid cooling and rapid chip removal can be realized, the grinding wheel is applied to rapid and high-speed machining, the surface machining quality of work pieces is improved, the sharpness of the grinding wheel is kept, and the service life is prolonged.
Description
(1) technical field:
The present invention relates to grinding tool, be specially a kind of anti-mistake shape abnormity emery wheel.
(2) background technology:
Adopt emery wheel to complete to the grinding of metal or nonmetallic materials, use for plane machining the emery wheel that grinding face is plane (or running orbit is plane), often adopting grinding face for special-shaped edging processing is special-shaped formed grinding wheel.The special-shaped flour milling shape of emery wheel is corresponding to the corner shape need of material, the conventional edge angular shape of final molding is arc, also there are other shapes except arc, as are well-behaved geometry, or be the non-well-behaved geometry being formed by line segments such as straight line, camber line, curves.
For the stock of special-shaped edging, should be reserved with allowance, and allowance not stays for the shape of special-shaped grinding face, initial how much states of allowance are (common for square) of rule relatively in most cases, and material is also uniform.In process, may there is inequality in the processing capacity at each position that emery wheel abnormity flour milling is in axial direction gone up, the relation of some or even difference of magnification, and the material of emery wheel is inhomogeneity, this each position of just having caused emery wheel abnormity flour milling is degree of wear difference with the difference of processing capacity, make the special-shaped flour milling of emery wheel very easily lose shape and cannot normally use, need often to repair or lose shape and scrap.
Owing to being high-speed grinding, when emery wheel processing (flat surface grinding and special-shaped grinding), need to carry out cooling, the type of cooling provides for the cooling body of emery wheel machining tool, and according to the difference of the type of cooling, emery wheel machining tool is divided into external-cooling type grinding machine and inner-cooled grinding machine.
1, the cooling body of external-cooling type grinding machine is simple, be mainly the cooling tube of a connection pumping source, cooling tube is installed on work top, and the cooling fluid of cooling tube ejection directly acts on emery wheel working position, due to the centrifugal action that emery wheel rotates, cooling fluid will fly away from emery wheel working position fast; And when grinding between working face and work piece in conjunction with tightr, and the break flour producing when grinding has also formed the sealing to cooling fluid, in fact cooling fluid is difficult to enter into the working face of processing, and just plays the effect of cooling after precooling before emery wheel work, emery wheel work.
2, inner-cooled grinding machine supports the use the emery wheel with interior cooling structure, and cooling fluid can directly act on grinding working face, and its cooling effect is more effective than external-cooling type.The structure of inner-cooled emery wheel is on the axis hole of matrix central shaft position, to offer and the water inlet of inner-cooled grinder wheel rotating shaft delivery port contraposition, the inside of grinding wheel base body also offers (few in number) water stream channel, and on the bull ring of emery wheel, also offer (few in number) delivery port, cooling fluid is supplied with by the emery wheel rotating shaft delivery port that emery wheel is installed, cooling fluid enters the water inlet of grinding wheel base body axis hole from the delivery port of emery wheel rotating shaft, the delivery port through water stream channel from bull ring sprays and acts on grinding working face.
Owing to will solving layout and emery wheel rotating shaft and emery wheel central shaft hole entery and delivery port UNICOM and the sealing problem of internal cooling pipeline, it is the reason that causes inner-cooled grinding machine cooling body complexity, and then urge the manufacturing cost that has risen inner-cooled grinding machine, and plain wheel can't use on inner-cooled grinding machine, must use the special emery wheel with cooling structure, cause final comprehensive process cost to increase.
In addition, no matter on external-cooling type grinding machine, use plain wheel processing, or on inner-cooled grinding machine, use the processing of inner-cooled emery wheel, at present the emery wheel flour milling structures shape of technology the thread taken out of of break flour large, drag-out is limited.And the rate of discharge of break flour and discharge rate will directly affect crudy and efficiency, in the time that break flour amount is difficult to take out of completely, will make crudy and Efficiency Decreasing, this is also the key point that emery wheel operating efficiency cannot improve.
(3) summary of the invention:
For the deficiencies in the prior art part, the object of the invention is to design and a kind ofly strengthen the anti-mistake of emery wheel shape ability, improve emery wheel anti-the mistakes shape abnormity emery wheel in service life, the present invention is also by improvement grinding wheel structure, further improves cooling and chip removal effect.
Can realize the anti-mistake shape abnormity emery wheel of above-mentioned purpose, comprise matrix and be located at the bull ring on matrix, difference is that the non-physical treatment district that does not participate in grinding is set on the special-shaped flour milling of described bull ring, unless the special-shaped flour milling residue position beyond physical treatment district is for participating in the physical treatment district of grinding, described physical treatment district is the allowance corresponding to work piece co-located in disalignment to the total line length of locational circumference, its corresponding relation is proportional relationship or approximate proportional relationship, thereby forms the abrasion structure such as shape such as grade of special-shaped flour milling.
It is the physical treatment district (contacting the part of work piece while referring to grinding) in described bull ring, by the processing capacity that need to complete in process according to emery wheel, at grinding wheel spindle to the total line length of circumference that distributes correspondent entity processing district on diverse location, it is the position that workpiece allowance is large, its corresponding physical treatment district total line length of circumference is large, the position that workpiece allowance is little, its corresponding physical treatment district total line length of circumference is little, form direct proportion or approximate proportional relationship between the two, thereby form the abrasion structure such as shape such as grade of emery wheel, solve or alleviate special-shaped emery wheel with this and lose shape problem.
When work piece is not that very high, wider range or emery wheel manufacture difficulty are when excessive to shape need, the processing capacity that need to complete in process according to emery wheel, at grinding wheel spindle, to the total line length of circumference that distributes correspondent entity processing district on diverse location, the proportionate relationship forming between the two can suitably be relaxed.
Described non-physical treatment district can be set to any shape in principle, as being set to well-behaved geometry, or is made as the non-well-behaved geometry being made up of line segments such as straight line, camber line, curves.
For the arc machined surface of work piece, the shape in described non-physical treatment district can adopt and be easy to the circular or oval of processing.
Be greater than in work piece machined surface thickness situation at the axial width in non-physical treatment district, physical treatment district formation has the grinding of microspur discontinuous or half discontinuous grinding structure, half discontinuous grinding structure has less beating, and is more conducive to the higher processing that limit requires of collapsing.
Be less than work piece machined surface thickness at the axial width in non-physical treatment district, physical treatment district forms continous way grinding structure, eliminates the limit that collapses of beating and bringing, and can meet to collapse limit and require high processing operating mode.
Described non-physical treatment district is generally and on special-shaped flour milling, offers recess and form.
For making emery wheel of the present invention there is interior cooling structure, described recess can be connected to bull ring and forms port (doubling as delivery port), now offer in described matrix inside the water stream channel being communicated with each port, described each water stream channel and water inlet conducting, cooling water is applied to grinding working face by water stream channel through non-physical treatment district (port), ensures that the whole process in process is cooling.
For reaching omnidistance cooling effect, the contacting within the scope of line length during with work piece grinding at bull ring, the quantity of described port is less than 30 for being greater than 0.
Setting and the conduction mode thereof of described each water stream channel and water inlet have multiple, as it can be similar to existing inner-cooled emery wheel, be that described each water stream channel meets at the water inlet of offering on the axis hole of matrix central shaft position, cooling water enters the water inlet of matrix central shaft hole from the delivery port of emery wheel rotating shaft, be applied to grinding working face by water stream channel through non-physical treatment district (port).
The setting of described each water stream channel and water inlet and conduction mode thereof preferably by change water inlet position and on external-cooling type grinding machine realize in refrigerating function, one of method be by water inlet be opened on matrix, become open uncovered, the cooling fluid of the cooling tube ejection of external-cooling type grinding machine enters from the uncovered of matrix, be applied to grinding working face by water stream channel through non-physical treatment district (port), ensure that equally the whole process in process is cooling.
Can further optimize basal body structure, and then the processing of simplification water inlet and water stream channel, one is optimized structure and is: described matrix comprises two substrates, and bull ring clamping is consolidated between substrate, between substrate, also form the storage area of playing water stream channel effect, described uncovered being opened on a substrate.
Can be set to the pressing plate of installing with another piece substrate by a substrate, central shaft position is located on another piece substrate, described uncovered for being opened in the collar extension on pressing plate.
The collar extension of described pressing plate can self-assembling formation, and method is that pressing plate is made as to ring flat-plate, and the interior ring diameter of pressing plate is increased to (being greater than substrate center's axle position), and described collar extension is formed in pressing plate between ring and the central shaft position of substrate.
The port of described perforation bull ring also has concurrently and holds bits and chip removal function, the break flour producing in process is introduced in the port that machined surface is corresponding and stores, the port that stores break flour leaves after machined surface with emery wheel, under the effect of centrifugal force and spurting cooling fluid, break flour is discharged smoothly from emery wheel port.
For two emery wheels or the coaxial situation about using side by side of multiple emery wheel, particularly for the emery wheel for external-cooling type grinding machine, can take the mode of the water stream channel mutual conduction between emery wheel, ensure the supply of cooling fluid to each emery wheel.
Technical scheme of the present invention is also applicable to " dry grinding " processes, but dry grinding cooling water is now " air ", and described water inlet, water stream channel and port (delivery port) correspond to air inlet, gas channel and gas outlet.
Advantage of the present invention:
1, the anti-mistake of the present invention shape abnormity emery wheel such as has at the shape abrasion structure, structurally promotes emery wheel non-deformability, makes emery wheel lose shape, Failure Factors reduces greatly, improves the life-span of emery wheel.
2, the present invention can be according to the quality requirement of work piece, adopt continous way, discontinuous, half discontinuous grinding method, in conjunction with inner-cooled Cooling Mode, quick row (appearance) bits structure, the surface roughness of surface to be machined and the performance of emery wheel sharpness are increased substantially, guarantee that emery wheel more can be applicable to fast, High-speed machining.
3, the present invention makes most external-cooling types abnormity process equipments on market hardly by the performance that increases any cost and just can reach inner-cooled process equipment, avoids the more funds of input to buy expensive inner-cooled process equipment, and economic benefit is very obvious.
(4) brief description of the drawings:
Fig. 1 is the perspective view of one embodiment of the present invention.
Fig. 2 is the front view of Fig. 1 embodiment.
Fig. 3 is the internal structure schematic diagram of Fig. 2.
Fig. 4 (a) is in Fig. 1, Fig. 2, Fig. 3, and non-physical treatment district is distribution situation schematic diagram on the special-shaped flour milling of bull ring, and the axial width in non-physical treatment district is greater than the thickness of work piece.
Fig. 4 (b) is in Fig. 1, Fig. 2, Fig. 3, and non-physical treatment district is distribution situation schematic diagram on the special-shaped flour milling of bull ring, and the axial width in non-physical treatment district is less than the thickness of work piece.
Fig. 5 is the processing dimension figure of work piece.
Figure number mark: 1 matrix; 1-1, substrate; 1-2, pressing plate; 2, bull ring, 2-1, non-physical treatment district; 2-2, physical treatment district; 3, water inlet; 4, support column; 5, storage area; 6, screw; 7, central shaft position; 8, work piece.
(5) detailed description of the invention:
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further:
The anti-mistake of the present invention shape abnormity emery wheel is made up of matrix 1 and bull ring 2, and wherein matrix 1 is assembled by substrate 1-1 and pressing plate 1-2.
Described substrate 1-1 is plectane, axle position 7 centered by the place of substrate 1-1 axle center, the axis hole of described central shaft position 7 coordinates installation with the emery wheel rotating shaft of grinding machine, described pressing plate 1-2 is ring flat-plate, the outer ring diameter of pressing plate 1-2 is identical with substrate 1-1 circle diameter, and the interior ring diameter of pressing plate 1-2 is greater than the external diameter of substrate 1-1 central shaft position 7; Between substrate 1-1 and pressing plate 1-2, use the hollow support post 4 of circumference uniform distribution every sky, corresponding to each support column 4 positions, substrate 1-1 and pressing plate 1-2 are axially fastened with screw 6, meanwhile bull ring 2 is clamped fixed (conventional glue is bonding) by the circumferential outer edge inner side end of substrate 1-1 and pressing plate 1-2, as shown in Figure 1, Figure 2, Figure 3 shows.
Taking Machining Arc limit as example, the special-shaped flour milling of described bull ring 2 is arc, on special-shaped flour milling, inwardly hollow out offers uniform circular or oval port (connecting bull ring 2), the non-physical treatment district 2-1 that described circle or oval port are special-shaped flour milling, non-physical treatment district 2-1 also doubles as simultaneously and holds bits, chip removal mouth and coolant outlet, the remainder of abnormity flour milling is the physical treatment district 2-2 contacting with work piece 8, when wheel grinding, bull ring 2 and work piece 8 contacts within the scope of line length, the quantity of non-physical treatment district 2-1 is less than 30 for being greater than 0, and described physical treatment district 2-2 is the allowance corresponding to workpiece to be machined co-located in disalignment to the total line length of locational circumference, its corresponding relation is proportional relationship or approximate proportional relationship, thereby form the abrasion structure such as shape such as grade of special-shaped flour milling, as Fig. 1, Fig. 2, shown in Fig. 4.
As shown in Figure 5, the material thickness 5mm of work piece 8, circular arc sagitta 1.5mm, minimum position (middle part of the thickness direction) surplus of allowance is 1mm, position (two of the left and right end face) surplus of processing capacity maximum is 2.5mm, and work piece 8 allowance vertically with the proportional relationship of the total line length of circumference of corresponding physical treatment district 2-2 is: minimum margin; Maximum surplus=1; 2.5.
As shown in Fig. 4 (a), in the time that the axial width of non-physical treatment district 2-1 is greater than the thickness of work piece 8 machined surfaces, form and have the grinding of microspur discontinuous or half discontinuous grinding structure, half discontinuous grinding structure has less beating, and is more conducive to the higher processing that limit requires of collapsing; Require high in the situation that collapsing limit, can select the axial width of non-physical treatment district 2-1 to be less than the thickness of work piece 8 machined surfaces, form continous way grinding structure, eliminate the limit that collapses of beating and bringing, as shown in Fig. 4 (b).
The anti-mistake of the present invention shape abnormity emery wheel embodiment has interior cooling structure, can on external-cooling type grinding machine, use, the water inlet 3 of cooling water is the collar extension between pressing plate 1-2 and substrate 1-1 central shaft position 7, the storage area 5 that cavity between substrate 1-1 and pressing plate 1-2 is cooling water, non-physical treatment district 2-1 (circular or oval port) communicates with storage area 5, as shown in Figure 1, Figure 3.
Add man-hour, wheel grinding workpiece, the cooling tube of external-cooling type grinding machine is aimed at the collar extension (being water inlet 3) between pressing plate 1-2 and substrate 1-1 central shaft position 7, cooling water enters and in the interior preservation in storage area 5 from collar extension, due to centrifugal action, cooling water in storage area 5 gets rid of into grinding area by non-physical treatment district 2-1 (circular or oval port), and realization is interior cooling to work piece 8; The break flour producing when grinding enters temporary transient storage in non-physical treatment district 2-1 (circular or oval port), the non-physical treatment district 2-1 (circular or oval port) that stores break flour is leaving behind grinding area, under the acting in conjunction of centrifugal force and cooling water, break flour is discharged from.
Emery wheel of the present invention can make break flour can discharge fast in time emery wheel, can make abrasive grain can better keep the height of exposure, and get grinding capacity the quarter that is conducive to improve abrasive grain, reaches the effect that improves sharpness; Meanwhile, due to the quick discharge of break flour, be conducive to cooling water and play a role, greatly reduce the heat in metal cutting of abrasive grain and the frictional heat due to break flour existence, improve the condition of work of abrasive grain, be conducive to the Strength retention of abrasive grain, improved the life-span of emery wheel; The reduction of frictional heat, also will be conducive to improve the surface quality of work piece 8.
Special circumstances: in the time that special-shaped flour milling is Complex Different Shape face, complicated shaped face can be split as to some sections and make several emery wheels, can be considered multiple emery wheels stacks.
Technical scheme of the present invention is specially adapted to process on the emery wheel of fragile metal or nonmetallic materials and applies, and the bull ring 2 use super hard abrasives of described emery wheel are made, and the physical treatment district 2-2 of bull ring 2 can be disposal molding mode or various amalgamation molding mode forms.
Above-described embodiment, is only the specific case that object of the present invention, technical scheme and beneficial effect are further described, and the present invention is not defined in this; All any amendments of making, be equal to replacement, improvement etc., within being all included in protection scope of the present invention within scope of disclosure of the present invention.
Claims (13)
1. anti-mistake shape abnormity emery wheel, comprise matrix (1) and be located at the bull ring (2) on matrix (1), it is characterized in that: the non-physical treatment district (2-1) that does not participate in grinding is set on the special-shaped flour milling of described bull ring (2), the recess of described non-physical treatment district (2-1) for offering on special-shaped flour milling, and the residue position of special-shaped flour milling is the physical treatment district (2-2) that participates in grinding, described physical treatment district (2-2) is the allowance corresponding to work piece (8) co-located in disalignment to the total line length of locational circumference, its corresponding relation is proportional relationship or approximate proportional relationship.
2. anti-mistake shape abnormity emery wheel according to claim 1, is characterized in that: described non-physical treatment district (2-1) is well-behaved geometry, or is the non-well-behaved geometry being made up of straight line, camber line, curve.
3. anti-mistake shape abnormity emery wheel according to claim 2, is characterized in that: described non-physical treatment district (2-1) is for circular or oval.
4. according to the anti-mistake shape abnormity emery wheel described in any one in claim 1～3, it is characterized in that: the axial width in described non-physical treatment district (2-1) is greater than the thickness of work piece (8) machined surface.
5. according to the anti-mistake shape abnormity emery wheel described in any one in claim 1～3, it is characterized in that: the axial width in described non-physical treatment district (2-1) is less than the thickness of work piece (8) machined surface.
6. according to the anti-mistake shape abnormity emery wheel described in any one in claim 1～3, it is characterized in that: described recess is for connecting the port of bull ring (2), the water stream channel being communicated with each port is offered in described matrix (1) inside, and described each water stream channel meets at the water inlet (3) of offering on matrix (1).
7. anti-mistake shape abnormity emery wheel according to claim 6, is characterized in that: the contacting within the scope of line length during with work piece (8) grinding at bull ring (2), the quantity of described port is less than 30 for being greater than 0.
8. anti-mistake shape abnormity emery wheel according to claim 6, is characterized in that: described water inlet (3) is for being opened in external uncovered on matrix (1) or being opened on the axis hole of matrix (1) central shaft position (7).
9. anti-mistake shape abnormity emery wheel according to claim 8, it is characterized in that: described matrix (1) comprises two substrates (1-1), bull ring (2) clamping is consolidated between substrate (1-1), the storage area (5) that has also formed water stream channel effect between substrate (1-1), described water inlet (3) is opened on substrate (1-1).
10. anti-mistake shape abnormity emery wheel according to claim 9, it is characterized in that: a described substrate (1-1) is the pressing plate (1-2) of installing with another piece substrate (1-1), it is upper that another piece substrate (1-1) is located in central shaft position (7), and described water inlet (3) is for being opened in the collar extension of offering on pressing plate (1-2).
11. anti-mistake shape abnormity emery wheels according to claim 10, it is characterized in that: described pressing plate (1-2) is ring flat-plate, the interior ring diameter of pressing plate (1-2) is greater than the central shaft position (7) of substrate (1-1), and described collar extension is formed between the interior ring of pressing plate (1-2) and the central shaft position (7) of substrate (1-1).
12. anti-mistake shape abnormity emery wheels according to claim 8, is characterized in that: when two coaxial uses side by side of the above emery wheel, and the water stream channel mutual conduction between described each matrix (1).
13. according to the anti-mistake shape abnormity emery wheel described in any one in claim 1～3, it is characterized in that: described bull ring (2) is made with super hard abrasive, the physical treatment district (2-2) of bull ring (2) is that disposal molding mode or amalgamation molding mode form.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210013303.8A CN102554810B (en) | 2012-01-17 | 2012-01-17 | Anti-deformation special-shaped grinding wheel |
| PCT/CN2013/070506 WO2013107339A1 (en) | 2012-01-17 | 2013-01-16 | Highly efficient cutting and grinding wheel designed to retain its shape |
| JP2014551519A JP5922798B2 (en) | 2012-01-17 | 2013-01-16 | Highly efficient grinding wheel with strain resistance |
| EP13738994.6A EP2805796B1 (en) | 2012-01-17 | 2013-01-16 | Grinding method |
| RU2014133656A RU2607062C2 (en) | 2012-01-17 | 2013-01-16 | High-efficiency cutting and grinding wheel, preserving shape |
| KR1020147021553A KR20140121416A (en) | 2012-01-17 | 2013-01-16 | Highly efficient cutting and grinding wheel designed to retain its shape |
| PL13738994T PL2805796T3 (en) | 2012-01-17 | 2013-01-16 | Grinding method |
| ES13738994T ES2696648T3 (en) | 2012-01-17 | 2013-01-16 | Frosting method |
| CA2861578A CA2861578C (en) | 2012-01-17 | 2013-01-16 | Highly efficient cutting and grinding wheel designed to retain its shape |
| US14/332,348 US20140329448A1 (en) | 2012-01-17 | 2014-07-15 | Grinding wheel |
| US17/363,012 US20210323123A1 (en) | 2012-01-17 | 2021-06-30 | Manufacturing method for grinding wheel and grinding method for grinding workpiece using grinding wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210013303.8A CN102554810B (en) | 2012-01-17 | 2012-01-17 | Anti-deformation special-shaped grinding wheel |
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| CN102554810A CN102554810A (en) | 2012-07-11 |
| CN102554810B true CN102554810B (en) | 2014-12-03 |
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| CN201210013303.8A Active CN102554810B (en) | 2012-01-17 | 2012-01-17 | Anti-deformation special-shaped grinding wheel |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5922798B2 (en) * | 2012-01-17 | 2016-05-24 | 桂林▲創▼源金▲剛▼石有限公司 | Highly efficient grinding wheel with strain resistance |
| CN103447904B (en) * | 2013-09-09 | 2015-09-23 | 南通恒力重工机械有限公司 | Large-scale grinding knife tool |
| CN104723198A (en) * | 2015-03-17 | 2015-06-24 | 上海格尔汽车附件有限公司 | Automobile electric steering device worm and gear assembling end grinding process |
| CN106903567B (en) * | 2017-03-17 | 2023-05-12 | 桂林创源金刚石有限公司 | Diamond special-shaped grinding wheel and vertical machining cooling system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20000060989A (en) * | 1999-03-22 | 2000-10-16 | 김세광 | A grinding attachment having buff wheel |
| JP4141454B2 (en) * | 2005-03-25 | 2008-08-27 | 株式会社ノリタケスーパーアブレーシブ | Grinding wheel |
| CN101870087A (en) * | 2010-06-13 | 2010-10-27 | 北京航空航天大学 | Open feed liquid self-sucking type inner cooling grinding wheel device for face grinding |
| CN102240985B (en) * | 2011-07-12 | 2013-01-09 | 苏州南航腾龙科技有限公司 | Contour resin grinding wheel formed by grinding processing through V-shaped groove |
| CN202804968U (en) * | 2012-01-17 | 2013-03-20 | 桂林创源金刚石有限公司 | Special-shaped grinding wheel for preventing disfigurement |
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