CN104552037A - Grinding wheel with beveled diamond tool bits - Google Patents
Grinding wheel with beveled diamond tool bits Download PDFInfo
- Publication number
- CN104552037A CN104552037A CN201510049447.2A CN201510049447A CN104552037A CN 104552037 A CN104552037 A CN 104552037A CN 201510049447 A CN201510049447 A CN 201510049447A CN 104552037 A CN104552037 A CN 104552037A
- Authority
- CN
- China
- Prior art keywords
- diamond
- diamond segment
- mounted substrate
- plane
- emery wheel
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with cooling provisions
Abstract
The invention provides a grinding wheel with beveled diamond tool bits. The grinding wheel comprises an annular mounting baseplate and multiple diamond tool bits fixed at the edge of the upper surface of the annular mounting baseplate, the diamond tool bits are arranged in the shape of a circular ring, a gap is formed between each two adjacent diamond tool bits, the diamond tool bits are distributed in a manner of radially inclining along the mounting baseplate, and height of the diamond tool bits gradually decreases from inside to outside along the radial direction of the mounting baseplate to enable the upper surface of the grinding wheel to be a bevel. Compared with the prior art, the grinding wheel has the advantages that the grinding wheel is more suitable for grinding the lateral side of a workpiece and high in degree of matching with an edge grinding machine, and diamond tools on the grinding wheel are short in edging time or even free of edging, so that machining materials are saved, and working efficiency is improved.
Description
Technical field
The present invention relates to a kind of grinding tool, particularly relate to a kind of emery wheel with inclined-plane diamond segment hard material being carried out to grinding.
Background technology
The length and width specification that Ceramic Tiles or the many needs of stone material are fixed, so that construction and installation, therefore needs to carry out edging process.Grinding is carried out to the edge of Ceramic Tiles or stone material, needs to use specific grinding tool---diamond-impregnated wheel.At the grinding knife tool of diamond-impregnated wheel, grinding is carried out to goods, obtain the product of fixing specification.Particularly, erect by diamond-impregnated wheel and install on the drive means, drive its high-speed rotation by drive unit, need the workpiece of processing from therebetween through out-of-date, diamond-impregnated wheel carries out grinding process to the edge of workpiece, makes workpiece obtain fixing length and width specification with this.Certain this processing is not limited to Ceramic Tiles or stone material, and most of hard material can process.
With reference to accompanying drawing 1, accompanying drawing 2 accompanying drawing 3, accompanying drawing 1 is the top view of diamond-impregnated wheel in prior art, and Fig. 2 is the sectional view along Figure 1A-A, and Fig. 3 is the top view of diamond segment.In accompanying drawing, 1 is mounted substrate, and 2 is diamond segment, and 3 is installing hole, and 4 is gap, and 10 is locating hole.With reference to Fig. 1, the diamond-impregnated wheel used at present comprises the mounted substrate of ring-type and multiple diamond segments of marginal surface fixed thereon, and diamond segment is vertical arrangement radially, in circular, be provided with installing hole at the center of mounted substrate, around installing hole, be provided with locating hole.During use, by its cutter head output being arranged on drive unit outwardly, when drive unit rotates, drive diamond-impregnated wheel to rotate, thus complete the rubbing down of workpiece is processed.Mounted substrate mostly is metal, such as hard alloy steel.Cutter head mostly then is diamond alloy and makes, and is welded on mounted substrate.The shape of the cutter head used at present is approximate cuboid, along the radial vertical distribution of mounted substrate, such vibrational power flow is mainly in order to cutter head processing and installation facility, but can make a big impact to diamond-impregnated wheel performance, because mounted substrate is ring-type, cutter head is in the circular edge being arranged in mounted substrate, like this, when cutter head is equal along the radial width of mounted substrate, the spacing ecto-entad of adjacent tool tips reduces gradually, arrange when being welded and fixed and careless slightlyly just there will be adhesion, spacing between cutter head is in order to chip removal and quick heat radiating, the diamond-impregnated wheel that prior art provides is because the spacing of adjacent tool tips reduces gradually along mounted substrate radial direction, even there is adhesion, when this can cause grinding, chip removal is not smooth, affect the service life of rubbing down effect and diamond-impregnated wheel.
The diamond-impregnated wheel used in prior art, the diamond tool grease head highness on emery wheel is consistent, and its upper surface is plane, and need in use to put the first edge on a knife or a pair of scissors for a long time, this not only wastes material, and incurs loss through delay man-hour, and production efficiency is lower.
Summary of the invention
The object of the invention is to propose a kind of Novel diamond emery wheel, it can shorten the time of putting the first edge on a knife or a pair of scissors greatly, even without the need to putting the first edge on a knife or a pair of scissors, directly going up machine work, saving material with this, promotes operating efficiency.
For reaching this object, the present invention is by the following technical solutions: a kind of emery wheel with inclined-plane diamond segment, it comprises the mounted substrate of ring-type and multiple diamond segments of marginal surface fixed thereon, and described diamond segment arrangement, in circular, has gap between adjacent diamond segment; Described diamond segment becomes along the radial direction of described mounted substrate the angular distribution of inclination, and described diamond tool grease head highness successively decreases from inside to outside along the radial direction of mounted substrate, makes its upper surface be inclined-plane.
Preferably, in above-mentioned diamond-impregnated wheel, the angle of inclination on inclined-plane is 5-45 °.
Further preferably, in above-mentioned diamond-impregnated wheel, described diamond segment is at least provided with towards the acute angle helical teeth of lopsidedness in described mounted substrate 1 inner side radially.
Preferably, described acute angle is 10-70 °, more preferably 30-60 °.Angle is little, and the sharpness of cutter head increases, and grinding efficiency is high, but correspondingly, on cutter head, the feasibility broken of helical teeth also increases; Angle is large, and the sharpness of cutter head reduces, and grinding efficiency is low, but correspondingly, on cutter head, the possibility that breaks of helical teeth also reduces.
Like this when grinding, the rotation direction of diamond-impregnated wheel and sharp keen helical teeth towards time consistent, sharp keen helical teeth first with absorption surface, can cut fast, and then promote stock-removing efficiency.
Preferably, in above-mentioned diamond-impregnated wheel, described diamond segment has foundation apart from width that is equal or gradual change apart from the center of described mounted substrate, when for gradual change width, distance emery wheel center is far away, have wider width, the outside of described diamond segment is arc and the semidiameter of the radius of described arc and described mounted substrate is less than or equal to 5mm.
Arrange like this and can avoid occurring adhesion in inner side, the local temperature that chip removal does not freely cause is too high, affects service life.In Grinding Process, can produce a large amount of heat, and grinding also can produce a large amount of chips, need to use water to carry out flushing cooling, the diamond-impregnated wheel of traditional structure, because cutter head is equal at the width of mounted substrate radial direction, such adjacent tool tips can reduce at medial gap, even occurs adhesion, chip is easily piled up herein, heat can not be taken away fast, cause localized hyperthermia, affect service life and ground effect; In new departure, diamond segment has foundation apart from width that is equal or gradual change apart from the center of described mounted substrate, when being the width of gradual change, distance emery wheel center is far away, have wider width, the outside of described diamond segment is arc and the radius of described arc is approximately equal to the radius of described mounted substrate; Like this, can ensure the spacing of medial gap, when grinding, chip can not be piled up herein, and heat can be taken away fast, and installs location easily, and error is little; The outside of diamond segment be arc and the radius of described arc is approximately equal to the radius of described mounted substrate time, erecting and welding error can be reduced further, allow erecting and welding more convenient simultaneously.
Preferably, in above-mentioned diamond-impregnated wheel, the outside of described diamond segment is arc and the radius of described arc equals the radius of described mounted substrate.Such erecting and welding is, can as reference outside the mounted substrate of ring-type, and reduce erecting and welding and misplace the error caused, while can also increase work efficiency.
Preferably, in above-mentioned diamond-impregnated wheel, the spacing in described gap is equal; The specification of described cutter head is identical.Arrange like this and can ensure that ground effect is consistent, obtain best ground effect.
Preferably, in above-mentioned diamond-impregnated wheel, be provided with installing hole at mounted substrate center, around described installing hole, be provided with locating hole.
Preferably, in above-mentioned diamond-impregnated wheel, described locating hole is at least 3, is and is distributed in around described installing hole.
Preferably, in above-mentioned diamond-impregnated wheel, described cutter head is 8-45.
Preferably, in above-mentioned diamond-impregnated wheel, described gap is 0.1-8mm.The too small chip produced during grinding that makes in gap is difficult to discharge, and easily causes hot-spot, burns emery wheel; Excesssive gap, then grinding efficiency can reduce.Selection gap is 0.1-8mm, then can solve this problem.
Preferably, in above-mentioned diamond-impregnated wheel, diamond segment becomes along the radial direction of described mounted substrate the angular distribution of inclination, is advisable with 10-55 ° in angle of inclination; More preferably 30-45 °.Better ground effect can be made it have by so arranging.
Compared to the prior art, diamond-impregnated wheel provided by the invention, its diamond tool grease head highness successively decreases from inside to outside along the radial direction of mounted substrate, makes its upper surface be inclined-plane.Can the time of putting the first edge on a knife or a pair of scissors being shortened, even without the need to putting the first edge on a knife or a pair of scissors, reaching saving material with this, promote the object of operating efficiency.
Accompanying drawing explanation
Fig. 1 is the plan structure schematic diagram of prior art diamond-impregnated wheel;
Fig. 2 is A-A cross section structure schematic diagram in Fig. 1;
Fig. 3 is the top view of diamond segment on prior art diamond-impregnated wheel;
Fig. 4 is the plan structure schematic diagram that a preferred embodiment of the invention provides diamond-impregnated wheel;
Fig. 5 is B-B cross section structure schematic diagram in Fig. 4;
Fig. 6 is the partial enlargement structural representation of C in Fig. 4;
Fig. 7 is the perspective view of diamond segment in a preferred embodiment of the invention;
Fig. 8 is the top view of diamond segment in a preferred embodiment of the invention;
Fig. 9 is the side view of diamond segment in a preferred embodiment of the invention.
Wherein: 1-mounted substrate; 2-diamond segment; 3-installing hole; 4-gap, 10-locating hole; 21-helical teeth; 22-inclined-plane.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.Need to illustrate, accompanying drawing is only for technical scheme being described, not drawing in strict accordance with ratio in kind, wherein convenient for illustrating, may have zooming in or out of local.
With reference to accompanying drawing 1, accompanying drawing 2 accompanying drawing 3, accompanying drawing 1 is the top view of diamond-impregnated wheel in prior art, and Fig. 2 is the sectional view along Figure 1A-A, and Fig. 3 is the top view of diamond segment.In accompanying drawing, 1 is mounted substrate, and 2 is diamond segment, and 3 is installing hole, and 4 is gap, and 10 is locating hole.With reference to Fig. 1, current used diamond-impregnated wheel comprises the mounted substrate of ring-type and multiple cutter heads of marginal surface fixed thereon, and cutter head is vertical arrangement radially, in circular, be provided with installing hole, be provided with locating hole around installing hole at the center of mounted substrate.During use, by its cutter head output being arranged on drive unit outwardly, when drive unit rotates, drive diamond-impregnated wheel to rotate, thus complete the rubbing down of workpiece is processed.Mounted substrate mostly is metal, such as hard alloy steel.Cutter head mostly then is diamond alloy and makes, and is welded on mounted substrate.The shape of the cutter head used at present is approximate cuboid, along the radial vertical distribution of mounted substrate, such vibrational power flow is mainly in order to cutter head processing and installation facility, but can make a big impact to diamond-impregnated wheel performance, because mounted substrate is ring-type, cutter head is in the circular edge being arranged in mounted substrate, like this, when cutter head is equal along the radial width of mounted substrate, (1) the spacing ecto-entad of adjacent tool tips reduces gradually, arrange when being welded and fixed and careless slightlyly just there will be adhesion, spacing between cutter head is in order to chip removal and takes away heat, the diamond-impregnated wheel that prior art provides is because the spacing of adjacent tool tips reduces gradually along mounted substrate radial direction, even there is adhesion, when this can cause grinding, chip removal is not smooth, affect the service life of rubbing down effect and diamond-impregnated wheel, (2) diamond-impregnated wheel of this kind of structure, when grinding, the sharpness of cutter is poor, and grinding efficiency is low.
Embodiment 1
A kind of diamond-impregnated wheel is provided in the present embodiment, it comprises the mounted substrate 1 of ring-type and multiple diamond segments 2 of marginal surface fixed thereon, described diamond segment 2 is arranged in circular, between adjacent diamond segment 2, there is gap 4: described diamond segment 2 becomes inclination 30 ° distribution along the radial direction of described mounted substrate 1, described diamond segment 2 has the width according to distance gradual change apart from the center of described mounted substrate 1, when being the width of gradual change, distance emery wheel center is far away, there is wider width, the outside of described diamond segment 2 is arc and the semidiameter of the radius of described arc and described mounted substrate 1 is less than or equal to 5mm, be provided with installing hole 3 at mounted substrate 1 center, around described installing hole 3, be also provided with locating hole 10.
This kind of diamond-impregnated wheel uses as under type manufacture, uses carbide alloy to be processed into circular mounted substrate 1, has installing hole 3, be provided with locating hole 10 around installing hole 3 in the middle part of mounted substrate 1.Cutter head then adopts diamond alloy cutter head, and is weldingly fixed on the edge of circular mounted substrate.Because the lateral surface of cutter head is arc, and the semidiameter of the radius of arc and mounted substrate 1 is less than or equal to 5mm, such setting when mounted can using the outer of mounted substrate as reference location, can under not using fixture fixing, diamond segment be uniformly distributed on mounted substrate, thus avoid the adhesion of adjacent tool tips, make it be easy to heat radiation and chip removal, the radial direction of this external cause itself and mounted substrate is that inclination 30 ° distributes, make the corner of cutter first contact grinding work piece, there is better sharpness.Angle for diamond segment and mounted substrate radial direction can be set to 10-55 degree, and preferable range is 30-45 °.
During use, vertically be arranged on the motor output shaft of edge polisher by installing hole 3 by diamond-impregnated wheel, and use bolt to be fixed by locating hole 10, locating hole is at least 3, certain locate mode is not limited thereto, and can play the mode of similar location fixed effect.During use, starter motor, when need the Ceramic Tiles of processing or stone material between relative diamond-impregnated wheel through out-of-date, diamond-impregnated wheel carries out grinding to its edge, obtains the product that the smooth of the edge is smooth, specification is consistent.This kind of diamond-impregnated wheel chip removal is effective, can avoid cutting the gap location of residue between cutter head and remain, avoid hot-spot to affect and use.
Diamond segment is 15-45 and is advisable, and be set to 27 in the present embodiment, the gap between diamond segment arranges and is advisable with 0.1-8mm.In above scope, have good ground effect, those skilled in the art can carry out collocation according to actual conditions and select.
This kind of design, compares with existing diamond-impregnated wheel, and service life promotes nearly one times, and during fabrication, the speed of welding of diamond segment and the degree of accuracy have and significantly promote.
Embodiment 2
In this enforcement, basic as embodiment 1, institute's difference is, diamond segment 2 has equal width apart from the center of described mounted substrate 1, setting like this, the specification of every block diamond segment is consistent, and its stock removal is also consistent in use, avoids the service life reduction caused because of a certain position serious wear.
And in the present embodiment, outside cutter head, the radius of cambered surface is equal with the radius of mounted substrate.
Embodiment 3
In the present embodiment, in order to allow diamond-impregnated wheel have better result of use, spy improves it.Particularly, improve diamond segment on emery wheel 2, as shown in accompanying drawing 6,7,8, diamond segment 2 is at least provided with towards the acute angle helical teeth 21 of lopsidedness in mounted substrate 1 inner side radially.Like this when grinding, the rotation direction of diamond-impregnated wheel and sharp keen helical teeth 21 towards time consistent, sharp keen helical teeth 21 first with absorption surface, can cut fast, and then promote stock-removing efficiency.With reference to accompanying drawing 1, diamond-impregnated wheel traditional is at present then adopt cutter head to be the structure of flat tooth, and the structure of this flat tooth, when grinding, be large portion, side and the absorption surface of cutter head, ground effect is poor, and efficiency is low.
Usually, in diamond-impregnated wheel, sharp angle is set to 10-70 ° and is advisable, more preferably 30-60 °, angle is little, and the sharpness of cutter head increases, and grinding efficiency is high, but correspondingly, on cutter head, the feasibility broken of helical teeth also increases; Angle is large, and the sharpness of cutter head reduces, and grinding efficiency is low, but correspondingly, on cutter head, the possibility that breaks of helical teeth is also told somebody what one's real intentions are.Arranging in the present embodiment is comparatively 35-40 °, and under this angle, diamond segment has good sharpness, nor easily breaks.
Compared to the prior art, the grinding efficiency of diamond-impregnated wheel that the present embodiment provides improves nearly one times.
Embodiment 4
With reference to accompanying drawing 9, in the present embodiment, optimized further by the diamond segment on diamond-impregnated wheel, its height successively decreases from inside to outside along the radial direction of mounted substrate, makes its upper surface be inclined-plane; Inclination angle of inclined plane is 5-30 °, is preferably 10-20 °.
Because when grinding, for the ease of grinding, be not completely vertical when diamond-impregnated wheel is installed, but have certain inclination to workpiece direction, being to process facility like this, being beneficial to chip removal, and the brick mask that processing obtains has certain chamfering effect, is convenient to follow-up chamfer machining.Cutter head is set to outer low and inner high along the height of mounted substrate radial direction by we for this reason, can guarantee that contact when diamond-impregnated wheel adds grinding is face contact, greatly can shorten the running-in time on grinding line, traditional diamond-impregnated wheel, because cutter head is plane, the surperficial break-in of cutter head to the inclined-plane consistent with mounting inclination angle degree is needed just can formally to use, at running in stage, cause huge waste, inclined-plane cutter head is adopted to this, above problem can well be avoided, after substantially can installing, just can use after of short duration break-in.
In addition, the upper surface of diamond segment is set to successively decrease from inside to outside along mounted substrate footpath, higher inside it, also make cutter head have better sharpness, especially when such as embodiment 3, its sharpness is better.The surperficial cutter head for plane is compared traditionally, and its working (machining) efficiency can promote 1.5 times.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (8)
1. have an emery wheel for inclined-plane diamond segment, it comprises the mounted substrate of ring-type and multiple diamond segments of marginal surface fixed thereon, and described diamond segment arrangement, in circular, has gap between adjacent diamond segment; Described diamond segment becomes along the radial direction of described mounted substrate the angular distribution of inclination, and described diamond tool grease head highness successively decreases from inside to outside along the radial direction of mounted substrate, makes its upper surface be inclined-plane.
2. have the emery wheel of inclined-plane diamond segment as claimed in claim 1, it is characterized in that, the angle of inclination on described inclined-plane is 5-45 °.
3. have the emery wheel of inclined-plane diamond segment as claimed in claim 1, it is characterized in that, described diamond segment is at least provided with towards the acute angle helical teeth of lopsidedness in described mounted substrate 1 inner side radially.
4. have the emery wheel of inclined-plane diamond segment as claimed in claim 3, it is characterized in that, the angle of described acute angle is 10-70 °.
5. have the emery wheel of inclined-plane diamond segment as claimed in claim 1, it is characterized in that, described mounted substrate center is provided with installing hole, around described installing hole, be provided with locating hole.
6. have the emery wheel of inclined-plane diamond segment as claimed in claim 5, it is characterized in that, described locating hole is at least 3, is and is distributed in around described installing hole.
7. have the emery wheel of inclined-plane diamond segment as claimed in claim 1, it is characterized in that, described diamond segment is 8-45.
8. have the emery wheel of inclined-plane diamond segment as claimed in claim 1, it is characterized in that, described gap is 0.1-8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049447.2A CN104552037A (en) | 2015-01-31 | 2015-01-31 | Grinding wheel with beveled diamond tool bits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049447.2A CN104552037A (en) | 2015-01-31 | 2015-01-31 | Grinding wheel with beveled diamond tool bits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104552037A true CN104552037A (en) | 2015-04-29 |
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ID=53069648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510049447.2A Pending CN104552037A (en) | 2015-01-31 | 2015-01-31 | Grinding wheel with beveled diamond tool bits |
Country Status (1)
| Country | Link |
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| CN (1) | CN104552037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4082719A4 (en) * | 2019-12-27 | 2024-01-24 | Guilin Champion Union Diamond Co Ltd | Spliced chamfering device |
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| JP2006136957A (en) * | 2004-11-10 | 2006-06-01 | Asahi Diamond Industrial Co Ltd | Grinding wheel |
| CN101049684A (en) * | 2007-05-08 | 2007-10-10 | 广东奔朗超硬材料制品有限公司 | Edging wheel and fabricating technique |
| CN201095076Y (en) * | 2006-12-31 | 2008-08-06 | 郑州人造金刚石及制品工程技术研究中心 | V-shaped chip room diamond edge grinding wheel |
| CN202292467U (en) * | 2011-10-10 | 2012-07-04 | 河南万克钻石工具有限公司 | Tooth-punching grinding wheel |
| CN203817995U (en) * | 2014-05-07 | 2014-09-10 | 中芯国际集成电路制造(北京)有限公司 | Grinding wheel structure |
| CN204565937U (en) * | 2015-01-31 | 2015-08-19 | 范新晖 | A kind of emery wheel with inclined-plane diamond segment |
-
2015
- 2015-01-31 CN CN201510049447.2A patent/CN104552037A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006136957A (en) * | 2004-11-10 | 2006-06-01 | Asahi Diamond Industrial Co Ltd | Grinding wheel |
| CN201095076Y (en) * | 2006-12-31 | 2008-08-06 | 郑州人造金刚石及制品工程技术研究中心 | V-shaped chip room diamond edge grinding wheel |
| CN101049684A (en) * | 2007-05-08 | 2007-10-10 | 广东奔朗超硬材料制品有限公司 | Edging wheel and fabricating technique |
| CN202292467U (en) * | 2011-10-10 | 2012-07-04 | 河南万克钻石工具有限公司 | Tooth-punching grinding wheel |
| CN203817995U (en) * | 2014-05-07 | 2014-09-10 | 中芯国际集成电路制造(北京)有限公司 | Grinding wheel structure |
| CN204565937U (en) * | 2015-01-31 | 2015-08-19 | 范新晖 | A kind of emery wheel with inclined-plane diamond segment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4082719A4 (en) * | 2019-12-27 | 2024-01-24 | Guilin Champion Union Diamond Co Ltd | Spliced chamfering device |
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Application publication date: 20150429 |