JP2002086361A - Elastic grinding wheel - Google Patents

Elastic grinding wheel

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Publication number
JP2002086361A
JP2002086361A JP2000279183A JP2000279183A JP2002086361A JP 2002086361 A JP2002086361 A JP 2002086361A JP 2000279183 A JP2000279183 A JP 2000279183A JP 2000279183 A JP2000279183 A JP 2000279183A JP 2002086361 A JP2002086361 A JP 2002086361A
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JP
Japan
Prior art keywords
resin
elastic
binder
parts
resin binder
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.)
Pending
Application number
JP2000279183A
Other languages
Japanese (ja)
Inventor
Motokimi Katsuoka
Kenji Kikuzawa
求仁 勝岡
賢二 菊澤
Original Assignee
Taimei Chemicals Co Ltd
Xebec Technology Co Ltd
大明化学工業株式会社
株式会社ジーベックテクノロジー
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 Taimei Chemicals Co Ltd, Xebec Technology Co Ltd, 大明化学工業株式会社, 株式会社ジーベックテクノロジー filed Critical Taimei Chemicals Co Ltd
Priority to JP2000279183A priority Critical patent/JP2002086361A/en
Publication of JP2002086361A publication Critical patent/JP2002086361A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide an elastic grinding wheel in which demerits of any elastic grinding wheel of conventional type are eliminated, whereby there is no risk that abrasive grains slip off or the grinding wheel chips and also excellent polishing performance and burr removing performance are established. SOLUTION: A block is formed so that inorganic fibers having polishing capability are arranged with their fiber directions drawn into alignment and fastened by a resin binder, and the elastic grinding wheel according to the invention is configured so that this block is embedded in a resin binder having rubber resilience in such a condition that the inorganic fibers are directed to the direction of a work to be ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a metal or
The present invention relates to a novel grindstone for grinding, polishing, or deburring nonmetals. More specifically, iron or iron alloys, aluminum or aluminum alloys, magnesium alloys, copper or copper alloys, or stone, single-crystal or polycrystalline silicon, and non-metals such as ceramics are ground and polished, or And a grindstone for performing deburring.

[0002]

2. Description of the Related Art Conventionally, a grinding stone in which abrasive grains are solidified with a resin into round beads having a particle diameter of several mm and buried in a resin binder having rubber elasticity has been used as a grinding stone for this purpose. ing. Such a grindstone is highly efficient for deburring and polishing, and in particular, has excellent characteristics of high efficiency, good surface quality and no clogging for deburring and polishing of aluminum and magnesium. Things.

[0003] That is, the characteristic of this type of grinding stone is that a binder having rubber elasticity is used as a binder for burying and holding the grinding stone, so that when the grinding stone is pressed against the work, the bead-like grinding stone is formed of the binder. It is pushed into the binder by the elasticity, and is constantly pressed against the work due to the elasticity of the binder.Moreover, because it is not a hard solid shape like a conventional grindstone, the hit against the work is soft and it is applied to the grindstone like a conventional grindstone. It has excellent characteristics that the work does not bounce off due to the impact when hit.

[0004] Further, since the grindstone has elasticity, it can be adapted to a slightly curved surface, and is most suitable for deburring and polishing of a work having a curved surface. Also, there is no need to rotate the grindstone at high speed for polishing and deburring,
It has an excellent feature that a grindstone with a diameter of 150 mm can be deburred and polished with a sufficiently high efficiency at a rotation speed of 300 revolutions / minute. Also, 150th and 12th
The characteristic of the whetstone, which is a bead-shaped whetstone made by solidifying the 0-th grit with resin and embedded in an elastic binder, is that despite the extremely coarse grit, the finish of the polished surface is good and the finish is low. there were.

[0005]

However, the disadvantage of these grinding stones is that the grinding stone, which is formed into a round bead by solidifying the powder of abrasive grains buried and held in an elastic binder with a resin, is difficult to remove burrs. It came off during polishing. This is because beads having a spherical shape and an elastic resin serving as a binder generally have low adhesive strength. Therefore, if the beads come off frequently, the polishing property is affected, and the reliability of polishing is lacking.

In addition, when the edge of the work is deburred or polished, the sharp edge of the work has a disadvantage that beads of abrasive grains are loosened from the grindstone and fall off. In addition, deburring or polishing at the edge portion of the work cannot be performed with a grindstone in which such abrasive grains are solidified into beads and embedded. Accordingly, an object of the present invention is to eliminate the drawbacks of the conventional elastic grindstone, to provide an elastic grindstone excellent in abrasiveness and deburring property without causing abrasive grains to fall off or chipping.

[0007]

As a result of intensive studies by the present inventors, inorganic fibers having abrasiveness aligned in one direction or an arbitrary direction such as a traversing direction instead of abrasive grains, that is, Alumina fiber, silicon carbide fiber, boron fiber, etc. are solidified with a thermosetting resin and formed into an appropriate shape, and this is shaped into a short rod-shaped or plate-shaped block with a diamond cutter or the like. The block body is arranged with its fiber direction facing the work, solidified with elastic resin to form a grindstone, and deburring and polishing properties are compared with the conventional abrasive grindstone using the above. It has been found that it exerts polishing and deburring ability. Moreover, the fiber exerts a reinforcing effect, beads fall off like an elastic whetstone buried and held in an elastic resin by hardening abrasive grains into beads,
Uniform deburring or polishing was possible without chipping of the grindstone itself. Also, since the shape of the grindstone to be embedded is embedded so that the fiber direction is aligned and the tip part hits the work, the embedded grindstone does not crack or chip at all, and it is not spherical like a bead No phenomenon was observed in which the embedded grindstone fell off during polishing or deburring. Also,
Deburring and chamfering were carried out at the edge of the work, but the embedded grindstone did not fall off, and extremely smooth and even deburring and chamfering were possible. In particular, continuous deburring and polishing without clogging in deburring and polishing of aluminum products was possible.

The elastic whetstone of the present invention has been made based on such knowledge. As described in claim 1, a block body formed by aligning inorganic fibers having polishing performance in a fiber direction and solidifying the same with a resin binder is used. It is characterized by being embedded in a resin binder having rubber elasticity with the fiber direction of the fiber oriented in the work direction. The elastic grinding stone according to claim 2 is the elastic grinding stone according to claim 1, wherein the resin binder of the block body is contained in the resin binder.
Particle size of 1 to 30 μm based on 10 to 50 parts by mass with respect to 0 parts by mass
Characterized by containing alumina beads. The elastic grinding stone according to claim 3 is the elastic grinding stone according to claim 1 or 2, wherein any one of silicone rubber, urethane resin, epoxy urethane resin, and acrylic urethane resin is used as the resin binder having rubber elasticity. It is characterized by the following. The elastic grindstone according to claim 4 is the elastic grindstone according to any one of claims 1 to 3, wherein the resin binder having rubber elasticity is 20 to 60 parts by mass with respect to 100 parts by mass of the binder. Particle size 1
It is characterized by containing a foam of 0 to 150 μm. An elastic grinding stone according to a fifth aspect is the elastic grinding stone according to the fourth aspect, wherein a shirasu balloon is used as the foam. The elastic grinding stone according to claim 6 is the elastic grinding stone according to any one of claims 1 to 5, wherein the inorganic fibers are alumina long fibers, silicon carbide long fibers, boron long fibers, or glass long fibers. It is characterized by using fibers. Further, the elastic grindstone according to claim 7 is the elastic grindstone according to any one of claims 1 to 6, in the resin binder having rubber elasticity, 10 to 50 parts by mass with respect to 100 parts by mass of the resin binder. It is characterized by containing alumina abrasive grains, silicon carbide abrasive grains, boron carbide abrasive grains, or alumina beads. Also,
The elastic grindstone according to claim 8 is the elastic grindstone according to claim 1, wherein the resin binder of the block body is a thermosetting resin such as an epoxy resin, an acrylic resin, an unsaturated polyester resin, or a phenol resin, or a silicone rubber. And a resin having rubber elasticity such as urethane resin, epoxy urethane resin, and acrylic urethane resin.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION As a binder for preparing a block body to be embedded in the binder having rubber elasticity, a thermosetting resin such as an epoxy resin, an acrylic resin, an unsaturated polyester resin, a phenol resin, or a silicone is used. Examples include, but are not limited to, rubber, a resin having rubber elasticity such as a urethane resin, an epoxy urethane resin, and an acrylic urethane resin.

Further, by adding alumina beads or abrasive grains to these resin binders, it is possible to prevent the embedded fiber whetstone pieces (blocks) from being clogged by aluminum, copper or magnesium alloy. In particular, alumina beads having a particle diameter of 1 to 30 μm serve as voids (pores) in the grindstone when falling off, so that the grinding and polishing properties are improved.

As the resin binder having rubber elasticity for embedding the fiber grindstone pieces, any resin having rubber elasticity can exhibit its function.
It is preferable to use a urethane resin, an epoxy urethane resin, an acrylic urethane resin, or the like. In particular, since silicone rubber has heat resistance, it is most suitable for a polishing operation involving heat generation.

In addition, by adding a foam having a particle size of 10 to 150 μm to a resin binder having rubber elasticity for embedding the fiber grindstone pieces, the elastic binder can be reduced to reduce the fiber grindstone pieces during polishing or deburring. Wear can be adjusted, and it is possible to make a grinding wheel most suitable for deburring and polishing. In particular, as the foam to be added, inorganic glass hollow beads, alumina hollow beads, or shirasu balloons are suitable, and shirasu balloons are most suitable because of their bulkiness.

At the same time as adding these foams, abrasive grains such as alumina abrasive grains, silicon carbide abrasive grains, boron carbide abrasive grains, or alumina beads are added to reduce the wear amount of the elastic binder to the fiber grindstone pieces. Matching wear is also a very effective means of optimizing abrasiveness.

In order to produce a fiber grindstone piece, it is possible to use inorganic short fibers or whiskers in one direction as inorganic fibers, but inorganic long fibers such as alumina long fibers and silicon carbide long fibers are used. It is preferable to use boron long fibers, and when the material of the work is aluminum or magnesium alloy, it is preferable to use long glass fibers.

The resin binder of the fiber whetstone piece (block) may be an epoxy resin, an acrylic resin,
Unsaturated polyester resin, thermosetting resin such as phenolic resin, or silicone rubber, urethane resin,
A resin having rubber elasticity such as an epoxy urethane resin or an acrylic urethane resin can be used. When a resin having rubber elasticity is used, an elastic grindstone suitable for use as a rust removing buff can be obtained.

[0016]

Next, an elastic grinding wheel of the present invention will be described based on specific examples. (Example 1) Alumina fiber (manufactured by Daimei Chemical Co., Ltd.) having a fiber diameter of 30 μm was wound around a cylinder having a diameter of 10.6 cm, and epoxy resin (Epicoat 828 made by Yuka Shell) was wound around the cylinder.
To 0 parts by mass, 3 parts by mass of boron trifluoride monoethylamine (manufactured by Stefa Chemifa) are added as a curing agent, and 20 parts by mass of alumina beads having a particle size of 1 μm (Admafine AO-502 manufactured by Admatechs) are added as an additive. The well-mixed resin liquid was impregnated with a roller, and this was cut open in the axial direction of the cylinder to produce a molding material having a fiber weight of 70%. This was placed in a mold heated to 180 ° C. to prepare a 10 mm thick plate in which 75% by weight of fiber content was aligned in one direction. From this, thickness 4mm, width 10mm, length 12mm
A large number of the blocks were cut out to form blocks (fiber grindstone pieces) for embedding in an elastic binder.

The above-mentioned block body is 10 cm in diameter and 2 c in depth.
m in an iron female mold at a distance of 5 mm along the inner circumference of the female mold from the center direction to the circumferential direction so that the direction of the aligned fibers is oriented. 7 parts by mass of a curing agent (Cat-RG manufactured by Shin-Etsu Chemical Co., Ltd.) are added to 100 parts by mass of KE1202 manufactured by Kogyo Co., Ltd.
Further, 50 parts by mass of a shirasu balloon (Sankilite YO4 manufactured by Sanki Kako Construction) having a particle size of 10 to 100 μm, abrasive grains (W
A # 600) 40 parts by weight of a resin solution of an elastic binder, which had been well mixed and mixed, were poured into the mixture and cured at 100 ° C. for 1 hour. FIG. 1 shows a schematic view of the obtained elastic grindstone. In the figure, 1 shows a block body formed by solidifying inorganic long fibers 2 with a resin binder 3, which is embedded and held in an elastic resin 4. This is designated as Sample A.

(Example 2) Next, the same resin composition as in Example 1 was used except that the resin composition was the same as that of Example 1 except that only 2 parts by weight of Curesol 2E4MZ (Shikoku Chemical Industry Co., Ltd.) was used as a curing agent. Pass the aligned alumina fiber and impregnate it with a resin binder, φ3.6mm
A round bar which was passed through a mold heated to 140 ° C., which had been hardened and pulled out, was cut into a length of 12 mm to form a block for embedding in an elastic binder.

Using the above-mentioned block body, in an iron female mold having a diameter of 10 cm and a depth of 2 cm, the fibers aligned along the circumferential direction from the center are oriented along the inner periphery of the mold. Arranged at 5 mm intervals, 7 parts by mass of a curing agent (Cat-RG manufactured by Shin-Etsu Chemical Co., Ltd.) were added to 100 parts by mass of silicone rubber (KE1202 manufactured by Shin-Etsu Chemical Co., Ltd.), and a shirasu balloon having a particle size of 10 to 100 μm was added. 50 parts by mass of Sankilite YO4 manufactured by Kako Construction, abrasive grains (WA #)
600) 40 parts by mass of the resin were added and mixed well, and the resin solution of the elastic binder was poured into the mixture and cured at 100 ° C. for 1 hour. FIG. 2 is a schematic view of the obtained elastic grindstone. In the figure, reference numeral 1 denotes a block formed by solidifying inorganic long fibers 2 with a resin binder 3, which is embedded and held in an elastic resin 4. This is designated as Sample B.

(Comparative Example 1) As a comparative example, instead of the block body (fiber grindstone piece) of Example 1, WA # 120 abrasive grains were added to 50 parts by mass of an epoxy resin epicoat 828 (without adding alumina beads). Using 50 parts by mass of an epoxy resin (Ceroxide 2021A manufactured by Daicel Chemical Industries), kneading with a resin binder obtained by adding 2 parts by mass of Curesol 2E4MZ (manufactured by Shikoku Chemicals) as a curing agent,
Vibration was applied to form a bead, which was placed in a curing furnace and cured to produce a large number of beads having a diameter of several mm with abrasive grains gathered. The beads were mixed with the elastic binder of Example 1 and poured into the same mold as in Example 1 to prepare a disk grindstone having a thickness of 2 cm and a diameter of 10 cm filled with abrasive beads. This whetstone is referred to as Sample C.

The thickness 2 cm, diameter 1
At the center of each of the 0 cm disk-shaped grinding wheel samples A, B and C, a mounting hole of φ10 mm shown in 5 in FIGS. 1 and 2 was drilled, fixed with bolts and nuts, and mounted on a lathe.
The work was pressed against the outer periphery of the grindstone at 0 revolutions / minute to perform a polishing test. That is, these three types of elastic disks A, B,
C was mounted on a lathe and rotated at 300 revolutions / minute, and the removal ability of the aluminum burr was compared. The results are shown in Table 1 below.
It was shown to. As a test piece for deburring, an aluminum door knob having burrs on a central parting line was used.

[0022]

[Table 1]

As is clear from Table 1, the elastic grindstone using the fiber grindstone can deburr the aluminum product in almost half the polishing time of the elastic grindstone using the WA # 120. Also, the whetstone containing abrasive beads often caused the beads to fall off during polishing, but this phenomenon was not observed at all in the case where the fiber whetstones of Samples A and B were embedded in an elastic binder. Also, no clogging of the embedded fiber whetstone pieces was observed.

(Example 3) Silicone rubber (KE1204AL manufactured by Shin-Etsu Chemical Co., Ltd.) and silicone rubber (KE1204BL manufactured by Shin-Etsu Chemical Co., Ltd.) were used as the block of the fiber grindstone embedded in the elastic binder instead of the resin binder of the block of Example 1. Was uniformly mixed by 50 parts by mass, and a resin solution was prepared by adding 20 parts by mass of alumina beads (Admafine AO-502 manufactured by Admatechs), and the resin was impregnated into alumina fibers in the same manner as in Example 1. This was cured at a mold temperature of 100 ° C. for 1 hour to prepare a plate. From this plate, a block having the same size as in Example 1 was cut out, and a disk grindstone was prepared in the same manner as in Example 1.

A polishing test of the above-mentioned aluminum doorknob was carried out using this disk grindstone. As a result, it was not suitable for deburring a parting line, but scotch-bright which is normally used for polishing the knob surface was used. A surface roughness comparable to that of the rough buff (SBI-01) was obtained.

[0026]

According to the present invention, in an elastic whetstone having cushioning properties, a block body of a fiber whetstone piece having an arbitrary shape such as a rod is embedded into a workpiece with its fiber direction directed toward a work. A rubber elastic grindstone having excellent deburring ability and polishing ability without falling off or chipping can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment of the elastic grinding wheel of the present invention.

FIG. 2 is a schematic view of another embodiment of the elastic grinding wheel of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Block body 2 Inorganic long fiber 3 Resin binder 4 Elastic resin 5 Mounting hole A Disk-shaped elastic grindstone B Disk-shaped elastic grindstone

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B24D 3/28 B24D 3/28 F-term (Reference) 3C063 AA02 AB03 BA03 BB03 BB04 BC03 BD01 BD04 BD09 BG01 BG07 BH04 CC04 CC17 FF22

Claims (8)

[Claims]
1. A block body formed by aligning inorganic fibers having polishing performance in the same fiber direction and solidifying with a resin binder is embedded in a resin binder having rubber elasticity in a state where the fiber direction of the inorganic fibers is directed to the work direction. Elastic whetstone made.
2. The resin binder of the block body contains alumina beads having a particle diameter of 1 to 30 μm in an amount of 10 to 50 parts by mass with respect to 100 parts by mass of the resin binder. Elastic whetstone.
3. The elastic grinding wheel according to claim 1, wherein any one of silicone rubber, urethane resin, epoxy urethane resin, and acrylic urethane resin is used as the resin binder having rubber elasticity.
4. The rubber binder according to claim 1, wherein the resin binder having rubber elasticity contains 20 to 60 parts by mass of a foam having a particle size of 10 to 150 μm with respect to 100 parts by mass of the resin binder. An elastic grindstone according to any one of claims 1 to 3.
5. The elastic grinding stone according to claim 4, wherein a shirasu balloon is used as the foam.
6. An alumina continuous fiber as the inorganic fiber,
The elastic grinding wheel according to any one of claims 1 to 5, wherein a silicon carbide long fiber, a boron long fiber, or a glass long fiber is used.
7. The resin binder having rubber elasticity contains 10 to 50 parts by mass of alumina abrasive grains, silicon carbide abrasive grains, boron carbide abrasive grains or alumina beads based on 100 parts by weight of the resin binder. The elastic grinding stone according to any one of claims 1 to 6, wherein
8. The resin binder of the block body may be a thermosetting resin such as an epoxy resin, an acrylic resin, an unsaturated polyester resin, or a phenol resin, or a silicone rubber, a urethane resin, an epoxy urethane resin, or an acrylic urethane resin. The elastic grindstone according to claim 1, wherein a resin having such rubber elasticity is used.
JP2000279183A 2000-09-14 2000-09-14 Elastic grinding wheel Pending JP2002086361A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005075148A1 (en) * 2004-02-09 2005-08-18 Bando Chemical Industries, Ltd. Polishing film and method for producing same
JP2007015091A (en) * 2005-07-11 2007-01-25 Ntn Corp Device and method for polishing shaft-like workpiece
JP2011117873A (en) * 2009-12-04 2011-06-16 Mitsubishi Heavy Ind Ltd Replica sampling method
CN103586786A (en) * 2013-11-08 2014-02-19 谢泽 Polishing wheel comprising natural fiber and thermal-expansion resin hollow microspheres
DE112006001202B4 (en) * 2005-05-11 2016-12-08 Kabushiki Kaisha Shofu Dental polishing instrument with spherical polishing grains made of resin
CN106584294A (en) * 2016-12-20 2017-04-26 江苏索力德机电科技股份有限公司 Braze-welding superhard abrasive grinding pan for flexible grinding

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5239888A (en) * 1975-09-23 1977-03-28 Shigeo Suda Process for producing an elastic grinding wheel and product
JPH04141373A (en) * 1990-09-28 1992-05-14 Toyoda Mach Works Ltd Manufacture of whisker grinding wheel
JPH0584670A (en) * 1991-09-27 1993-04-06 Mazda Motor Corp Polishing tool having polishing thread
JPH05253822A (en) * 1992-03-10 1993-10-05 Hitachi Metals Ltd Chamfering method of rare earth magnet
JPH10217130A (en) * 1997-01-30 1998-08-18 Jiibetsuku Technol:Kk Processing material and tool for processing
JPH1142566A (en) * 1997-07-29 1999-02-16 Nippon G C Kogyo Kk Polishing jig

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5239888A (en) * 1975-09-23 1977-03-28 Shigeo Suda Process for producing an elastic grinding wheel and product
JPH04141373A (en) * 1990-09-28 1992-05-14 Toyoda Mach Works Ltd Manufacture of whisker grinding wheel
JPH0584670A (en) * 1991-09-27 1993-04-06 Mazda Motor Corp Polishing tool having polishing thread
JPH05253822A (en) * 1992-03-10 1993-10-05 Hitachi Metals Ltd Chamfering method of rare earth magnet
JPH10217130A (en) * 1997-01-30 1998-08-18 Jiibetsuku Technol:Kk Processing material and tool for processing
JPH1142566A (en) * 1997-07-29 1999-02-16 Nippon G C Kogyo Kk Polishing jig

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005075148A1 (en) * 2004-02-09 2005-08-18 Bando Chemical Industries, Ltd. Polishing film and method for producing same
DE112006001202B4 (en) * 2005-05-11 2016-12-08 Kabushiki Kaisha Shofu Dental polishing instrument with spherical polishing grains made of resin
EP1911546A1 (en) * 2005-07-11 2008-04-16 Ntn Corporation Polishing device and polishing method for shaft-like work
EP1911546A4 (en) * 2005-07-11 2009-12-16 Ntn Toyo Bearing Co Ltd Polishing device and polishing method for shaft-like work
US8568201B2 (en) 2005-07-11 2013-10-29 Ntn Corporation Method and apparatus for grinding axial workpieces
JP2007015091A (en) * 2005-07-11 2007-01-25 Ntn Corp Device and method for polishing shaft-like workpiece
JP2011117873A (en) * 2009-12-04 2011-06-16 Mitsubishi Heavy Ind Ltd Replica sampling method
CN103586786A (en) * 2013-11-08 2014-02-19 谢泽 Polishing wheel comprising natural fiber and thermal-expansion resin hollow microspheres
CN106584294A (en) * 2016-12-20 2017-04-26 江苏索力德机电科技股份有限公司 Braze-welding superhard abrasive grinding pan for flexible grinding

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