JP2000226568A - Resin-impregnated vitrified whetstone containing solid lubricant - Google Patents

Resin-impregnated vitrified whetstone containing solid lubricant

Info

Publication number
JP2000226568A
JP2000226568A JP11026273A JP2627399A JP2000226568A JP 2000226568 A JP2000226568 A JP 2000226568A JP 11026273 A JP11026273 A JP 11026273A JP 2627399 A JP2627399 A JP 2627399A JP 2000226568 A JP2000226568 A JP 2000226568A
Authority
JP
Japan
Prior art keywords
resin
grinding
vitrified
solid lubricant
grindstone
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.)
Granted
Application number
JP11026273A
Other languages
Japanese (ja)
Other versions
JP3553810B2 (en
Inventor
Kenji Ito
健二 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noritake Co Ltd
Original Assignee
Noritake Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Noritake Co Ltd filed Critical Noritake Co Ltd
Priority to JP02627399A priority Critical patent/JP3553810B2/en
Publication of JP2000226568A publication Critical patent/JP2000226568A/en
Application granted granted Critical
Publication of JP3553810B2 publication Critical patent/JP3553810B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To obtain the subject vitrified whetstone hard to develop grinding scorch and sludge cloggings or welding while retaining sharpening easiness, and excellent in abrasive grain holding ability. SOLUTION: This vitrified whetstone has such advantages that, because the pores are filled with phenolic resin impregnated into the vitrified whetstone texture of the segment chip whetstone 10, metallic powder produced from a to-be-ground material during grinding operation does not clog in chip pockets, thereby effectively preventing welding and clogging phenomena and grinding scorch as well; besides, because the phenolic resin is softer than abrasive grains, chippings of this whetstone can be effectively prevented while retaining sharpening easiness as a characteristic of this whetstone; at the same, time, because the abrasive grains are also held by the phenolic resin, abrasive grain holding ability is enhanced, affording high grinding rate; furthermore, since hexagonal boron nitride as the solid lubricant is incorporated and homogeneously dispersed in the phenolic resin, a grinding operation can be carried out without the need of using any grinding liquid having lubricating effect, for example even with water or cool air alone.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ビトリファイド砥
石組織内に固体潤滑剤を含む熱硬化性樹脂が含浸され且
つ硬化させられた固体潤滑剤を含む樹脂含浸ビトリファ
イド砥石に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-impregnated vitrified grinding wheel containing a solid lubricant in which a vitrified grinding wheel structure is impregnated with a thermosetting resin containing a solid lubricant and cured.

【0002】[0002]

【従来の技術】ガラス質の無機(ビトリファイド)結合
剤により砥粒または砥粒と骨材が結合されて多数の気孔
が砥粒間に形成されたビトリファイド砥石組織を有する
ビトリファイド砥石は、砥粒保持力が強く且つ目立てが
容易であるなどの優れた特徴を備えているため、精密研
削などに多用されている。近年、研削時間の短縮の要請
に従って高能率で研削できるものが求められている。
2. Description of the Related Art A vitrified grindstone having a vitrified grindstone structure in which a number of pores are formed between abrasive grains by bonding abrasive grains or an abrasive grain and an aggregate with a vitreous inorganic (vitrified) binder is used to hold abrasive grains. Since it has excellent features such as strong force and easy sharpening, it is frequently used for precision grinding and the like. In recent years, there has been a demand for a material that can be ground with high efficiency in accordance with the demand for shortening the grinding time.

【0003】[0003]

【発明が解決しようとする課題】これに対し、無機結合
剤の割合を高くすることにより強度および結合度を高く
したビトリファイド砥石が提案され、実用に供されつつ
ある。これによれば、ビトリファイド砥石が硬くなるた
め、高能率研削という目的はある程度の範囲で達成でき
るが、未だ十分ではなかった。無機結合剤の割合を高く
することで高強度となることから高能率研削が可能とな
るが、無機結合剤の割合を高くすると、気孔が極端に少
なくなるだけでなく砥粒の破砕および離脱が不十分とな
って研削焼け、切粉の目詰まりや溶着が発生し易くなる
などの研削性能上の不都合が発生するのに加えて、使用
時においてビトリファイド砥石の欠けが発生し易くなる
という欠点があった。
On the other hand, a vitrified grindstone having a high strength and a high degree of bonding by increasing the proportion of an inorganic binder has been proposed and is being put to practical use. According to this, since the vitrified grindstone becomes hard, the purpose of high-efficiency grinding can be achieved within a certain range, but it has not been sufficient yet. High efficiency grinding is possible because high strength is achieved by increasing the ratio of the inorganic binder.However, when the ratio of the inorganic binder is increased, not only the number of pores is extremely reduced, but also the crushing and detachment of abrasive grains are prevented. In addition to the inconvenience of grinding performance such as insufficient grinding burn, chip clogging and welding, etc., and the disadvantage of chipping of the vitrified grinding wheel during use, there were.

【0004】一方、ビトリファイド砥石原料をホットプ
レスなどを用いて成形することにより得た気孔の少ない
ビトリファイド砥石を製造してそれを高能率研削に用い
ることが考えられるが、このような場合には、特殊且つ
能率の低い製造設備を用いることになって、製品が高価
となるだけでなく、製造可能な砥石寸法の制限がある。
On the other hand, it is conceivable to manufacture a vitrified grindstone having few pores obtained by molding a vitrified grindstone raw material using a hot press or the like and use it for high-efficiency grinding. In such a case, The use of special and inefficient manufacturing equipment not only makes the product expensive, but also limits the size of the grindstone that can be manufactured.

【0005】本発明は以上の事情を背景として為された
ものであり、その目的とするところは、ビトリファイド
砥石の特徴である目立ての容易性を保持したままで、研
削焼け、切粉の目詰まりや溶着が発生し難く、砥粒の保
持力に優れ、しかも、研削液を用いないで、水或いは冷
風によっても比較的充分な研削性能が得られるビトリフ
ァイド砥石を提供することにある。
The present invention has been made in view of the above circumstances, and an object of the present invention is to grind burns and clogging of chips while maintaining the ease of sharpening which is a feature of a vitrified grinding wheel. An object of the present invention is to provide a vitrified whetstone which is less likely to cause welding and welding, has excellent holding power for abrasive grains, and can obtain relatively sufficient grinding performance even with water or cold air without using a grinding fluid.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
の本発明の固体潤滑剤を含む樹脂含浸ビトリファイド砥
石の要旨とするところは、砥粒、或いは砥粒と骨材が無
機結合剤により結合されたビトリファイド砥石組織を備
えたビトリファイド砥石であって、前記ビトリファイド
砥石組織内の空隙内に、固体潤滑剤を含む樹脂が含浸さ
せられて硬化させられていることにある。
The gist of the resin-impregnated vitrified whetstone containing a solid lubricant according to the present invention for achieving the above object is that abrasive grains or a combination of abrasive grains and aggregates with an inorganic binder. A vitrified grindstone provided with a vitrified grindstone structure, wherein a resin containing a solid lubricant is impregnated in a void in the vitrified grindstone structure and cured.

【0007】[0007]

【発明の効果】このようにすれば、ビトリファイド砥石
組織内の空隙内に、固体潤滑剤を含む樹脂が含浸させら
れて硬化させられていることから、以下の効果が得られ
る。すなわち、固体潤滑剤を含む樹脂がビトリファイド
砥石組織内の空隙内に含浸且つ硬化させられているの
で、研削焼け、切粉の目詰まりや溶着が発生し難く、研
削加工上の問題が解消されるとともに、砥粒の保持力が
高められて研削比が大幅に改善され、しかもビトリファ
イド砥石の目立ての容易性が保持されつつ、そのビトリ
ファイド砥石の欠けが好適に防止される。換言すれば、
ビトリファイド砥石組織内に含浸させられる樹脂の存在
によって気孔が埋められているので、金属粉がチップポ
ケットに詰まることがなく、溶着や目詰まりの発生が好
適に防止されるとともに、気孔を埋める熱硬化性樹脂は
砥粒に比較して軟質であるので、被削材に対しては凹ん
だ状態となるので、砥粒の破砕や脱粒が適度に行われて
研削焼けも好適に防止され、しかも、無機結合剤により
弱く保持されている砥粒は熱硬化性樹脂によっても保持
されることにより保持力が高められてその早期の脱粒が
抑制されるので、高い研削比が得られるのである。そし
て、固体潤滑剤がビトリファイド砥石組織内の空隙内に
含浸させた樹脂中に含まれているので、潤滑効果を備え
た研削液を用いないで、水や冷風のみでも研削が可能と
なった。
According to the present invention, since the resin containing the solid lubricant is impregnated into the voids in the structure of the vitrified grindstone and cured, the following effects can be obtained. That is, since the resin containing the solid lubricant is impregnated and hardened in the voids in the vitrified grindstone structure, grinding burns, clogging and welding of chips are unlikely to occur, and problems in grinding processing are solved. At the same time, the holding power of the abrasive grains is increased, the grinding ratio is greatly improved, and the vitrified grinding wheel is easily prevented from being chipped while the ease of sharpening of the vitrified grinding wheel is maintained. In other words,
Since the pores are filled by the presence of the resin impregnated in the vitrified grindstone structure, the metal powder does not clog the chip pockets, and the occurrence of welding and clogging is suitably prevented, and thermosetting to fill the pores is performed. Since the abrasive resin is softer than the abrasive grains, it is recessed with respect to the work material, so that the abrasive grains are appropriately crushed or degranulated and the grinding burn is suitably prevented, and Abrasive grains that are weakly held by the inorganic binder are also held by the thermosetting resin, so that the holding power is enhanced and the early degranulation is suppressed, so that a high grinding ratio can be obtained. Since the solid lubricant is contained in the resin impregnated in the voids in the vitrified grindstone structure, grinding can be performed only with water or cold air without using a grinding fluid having a lubricating effect.

【0008】[0008]

【発明の他の態様】ここで、好適には、前記ビトリファ
イド砥石は、好ましくは10より大きく且つ230未満
程度、さらに好ましくは20〜200の集中度でダイヤ
モンド砥粒、CBN砥粒、或いはそれらの混合砥粒など
のヌープ硬度が3000以上であって60メッシュ(平
均粒径220μm)乃至800メッシュ(平均粒径20
μm)の超砥粒を含むものである。また、前記樹脂含浸
前のビトリファイド砥石は、20〜75容積%、さらに
好ましくは30〜65容積%の気孔率を備える。
In another embodiment of the present invention, the vitrified grindstone is preferably larger than 10 and smaller than about 230, more preferably 20 to 200, and more preferably diamond abrasive grains, CBN abrasive grains, or a mixture thereof. The Knoop hardness of the mixed abrasive grains is 3000 or more, and is from 60 mesh (average particle size 220 μm) to 800 mesh (average particle size 20
μm). The vitrified grindstone before the resin impregnation has a porosity of 20 to 75% by volume, more preferably 30 to 65% by volume.

【0009】また、好適には、前記無機結合剤は、超砥
粒を用いた場合に適当なもの、たとえばホウ珪酸ガラ
ス、結晶化ガラスが用いられる。この結晶化ガラスとし
ては、たとえばウィレマイトを析出するガラスである。
また、無機結合剤としては、砥粒の保持力を充分なもの
とするために、超砥粒の熱膨張係数に対して−2×10
-6乃至+2×10-6 (1/K:室温〜 500℃) の範囲の熱膨
張係数が選択される。
Preferably, the inorganic binder is a superabrasive.
Suitable when granules are used, such as borosilicate glass
And crystallized glass are used. This crystallized glass
For example, a glass on which willemite is precipitated.
In addition, as the inorganic binder, one that has sufficient holding power for abrasive grains
, The thermal expansion coefficient of the superabrasive is -2 × 10
-6Or + 2 × 10-6 (1 / K: room temperature to 500 ° C)
The expansion coefficient is selected.

【0010】また、好適には、前記無機結合剤は、砥粒
の保持力を維持し且つ前記のような気孔率を備えるため
に前記ビトリファイド砥石に対して15〜35体積%の
範囲の割合で用いられる。また、前記ビトリファイド超
砥粒砥石には、必要に応じて、無機バルーンのような無
機質中空物質のような気孔形成材が骨材として含まれて
もよい。
Preferably, the inorganic binder is contained in the vitrified grindstone in a proportion of 15 to 35% by volume with respect to the vitrified grindstone in order to maintain the holding power of the abrasive grains and provide the porosity as described above. Used. In addition, the vitrified superabrasive grindstone may include a pore forming material such as an inorganic hollow substance such as an inorganic balloon as an aggregate, if necessary.

【0011】また、好適には、前記樹脂は、フェノール
樹脂およびエポキシ樹脂から選択された少なくとも1種
類の熱硬化性樹脂である。このようにすれば、熱可塑性
樹脂を用いる場合に比較して、研削砥石の強度が高くさ
れる。
Preferably, the resin is at least one kind of thermosetting resin selected from a phenol resin and an epoxy resin. By doing so, the strength of the grinding wheel is increased as compared with the case where a thermoplastic resin is used.

【0012】また、好適には、前記固体潤滑剤は、前記
ビトリファイド砥石の気孔よりも十分に小さな径、たと
えば平均粒径が1μm以下の六方晶窒化ホウ素、二硫化
モリブデン、黒鉛、グラファイトである。このようにす
れば、固体潤滑剤がビトリファイド砥石組織内に均一に
配置されるので、その固体潤滑剤の潤滑効果が好適に得
られる。
Preferably, the solid lubricant is hexagonal boron nitride, molybdenum disulfide, graphite or graphite having a diameter sufficiently smaller than the pores of the vitrified grindstone, for example, an average particle diameter of 1 μm or less. With this configuration, the solid lubricant is uniformly arranged in the vitrified grindstone structure, so that the lubrication effect of the solid lubricant can be suitably obtained.

【0013】また、好適には、前記固体潤滑剤は、前記
ビトリファイド砥石組織内に含浸させる樹脂に対して1
乃至80重量%の範囲で含まれる。1重量%を下まわる
場合には固体潤滑剤の効果が充分に得られ難くなり、8
0重量%を越えると、樹脂の粘性が高くなってビトリフ
ァイド砥石組織に対する含浸が充分に行われ難くなる。
Preferably, the solid lubricant is added to the resin to be impregnated in the vitrified grindstone structure at a rate of 1%.
To 80% by weight. When the amount is less than 1% by weight, the effect of the solid lubricant cannot be sufficiently obtained.
If the content exceeds 0% by weight, the viscosity of the resin increases, and it becomes difficult to sufficiently impregnate the vitrified grindstone structure.

【0014】[0014]

【発明の好適な実施の形態】以下、本発明の一実施例を
図面に基づいて詳細に説明する。
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

【0015】図1は、本発明の一実施例の樹脂含浸補強
構造を備えたビトリファイド砥石であるセグメントチッ
プ砥石10を示している。このセグメントチップ砥石1
0は、全体として板材が円弧状に湾曲させられた形状を
成し、金属製、繊維強化樹脂製、或いはビトリファイド
砥石製のコア部12の外周面に対して、たとえばエポキ
シ系の接着剤により隙間なく貼り付けられるものであ
る。図2に示す砥石車18は、上記セグメントチップ砥
石10がコア部12の外周面に張り着けられることによ
り構成されたものである。なお、コア部12の中央に
は、回転軸取付穴19が設けられている。
FIG. 1 shows a segment chip grindstone 10 which is a vitrified grindstone provided with a resin impregnated reinforcing structure according to one embodiment of the present invention. This segment tip whetstone 1
Reference numeral 0 denotes a shape in which the plate material is curved in an arc as a whole, and a gap is formed between the outer peripheral surface of the core portion 12 made of metal, fiber reinforced resin, or vitrified whetstone by, for example, an epoxy-based adhesive. It can be pasted without. The grinding wheel 18 shown in FIG. 2 is configured by attaching the segment tip grinding wheel 10 to the outer peripheral surface of the core 12. A rotation shaft mounting hole 19 is provided at the center of the core portion 12.

【0016】上記セグメントチップ砥石10は、専ら研
削に関与する外周砥石層14およびその外周砥石層14
を機械的に支持するための基台として機能する内周砥石
層16とから一体的に構成されている。外周砥石層14
および内周砥石層16は、相互に共通の無機結合剤によ
り結合されているが、砥粒が主に相違する。すなわち、
外周砥石層14はCBN砥粒、ダイヤモンド砥粒などの
ヌープ硬度が3000以上の超砥粒を備えたものである
が、内周砥石層16は、溶融アルミナ質、炭化珪素質な
どの一般砥粒を備えて安価に構成されたものである。な
お、上記超砥粒は、60メッシュ(平均粒径220μ
m)乃至800メッシュ(平均粒径20μm)の範囲内
の大きさのものが好適に用いられる。
The above-mentioned segment chip grindstone 10 has an outer peripheral grindstone layer 14 and a peripheral grindstone layer 14 exclusively involved in grinding.
And the inner peripheral grindstone layer 16 functioning as a base for mechanically supporting the grinding wheel. Outer wheel layer 14
The inner peripheral grindstone layer 16 and the inner peripheral grindstone layer 16 are mutually bonded by a common inorganic binder, but mainly differ in abrasive grains. That is,
The outer peripheral grindstone layer 14 is provided with superabrasive grains having a Knoop hardness of 3000 or more such as CBN abrasive grains and diamond abrasive grains, while the inner peripheral grindstone layer 16 is provided with general abrasive grains such as fused alumina or silicon carbide. And is inexpensively configured. The super-abrasive grains have a mesh size of 60 mesh (average grain size of 220 μm).
m) to 800 mesh (average particle diameter 20 μm).

【0017】上記セグメントチップ砥石10は、たとえ
ば図3に示す工程に従って製造される。先ず、原料調合
工程20では、セグメントチップ砥石10の原料である
砥粒と、ガラス質の無機結合剤と、デキストリンのよう
な粘結剤と、必要に応じて適宜混入される有機物或いは
無機バルーンのような気孔形成剤とが外周砥石層14お
よび内周砥石層16毎に予め設定された割合で秤量され
且つ混合されることによりそれぞれ調合される。上記無
機結合剤は、ホウ珪酸ガラス、又はウィレマイトを析出
する結晶化ガラスであって、超砥粒の熱膨張係数に対し
て−2×10-6乃至+2×10-6 /K (室温〜500
℃)程度の熱膨張係数を備えたものである。また、上記
無機結合剤は、焼成後のビトリファイドチップ砥石10
において15乃至35容積%の範囲内で含有されるよう
に調合される。たとえば、外周砥石層14の原料として
は、GE社製CBN砥粒type-I#80/#100を50.0重量
部に対してビトリファイド結合剤を18.0重量部およ
び糊量を10.0重量部を混合したものが用意され、内
周砥石層16の原料としては、炭化珪素砥粒( #80)を5
0.0重量部に対してビトリファイド結合剤を18.0
重量部および糊量を10.0重量部を混合したものが用
意される。
The segment tip grinding wheel 10 is manufactured, for example, according to the process shown in FIG. First, in the raw material blending step 20, the abrasive grains, which are the raw materials of the segment tip grinding wheel 10, the vitreous inorganic binder, the binder such as dextrin, and the organic substance or inorganic balloon appropriately mixed as necessary. Such a pore forming agent is blended by weighing and mixing at a preset ratio for each of the outer peripheral grindstone layer 14 and the inner peripheral grindstone layer 16. The inorganic binder is borosilicate glass or crystallized glass that precipitates willemite. The inorganic binder has a thermal expansion coefficient of −2 × 10 −6 to + 2 × 10 −6 / K (room temperature to 500 ° C.).
° C). The above-mentioned inorganic binder is used in the vitrified tip grinding stone 10 after firing.
In the range of 15 to 35% by volume. For example, as a raw material of the outer peripheral grindstone layer 14, 18.0 parts by weight of the vitrified binder and 10.0 parts by weight of the glue are used for 50.0 parts by weight of CBN abrasive grains type-I # 80 / # 100 manufactured by GE. A mixture of parts by weight is prepared. As a raw material of the inner peripheral grindstone layer 16, silicon carbide abrasive grains (# 80)
18.0 parts by weight of vitrified binder was added to 18.0 parts by weight.
A mixture prepared by mixing 10.0 parts by weight and the paste amount is prepared.

【0018】次いで、成形工程22では、所定のプレス
金型内に上記外周砥石層14および内周砥石層16の原
料が充填され、且つプレスされることにより、図1に示
す形状に成形される。続く焼成工程24では、たとえば
900℃程度の温度で成形後の品物が焼成され、たとえ
ば長さ40mm、幅10.4mm、厚み7.4mmのセグメン
トチップ砥石10が得られる。この焼成工程24では、
原料に含まれる粘結剤が消失させられるとともに、無機
結合剤が溶融させられて砥粒を相互に結合する。これに
より、超砥粒が無機結合剤により結合された多数の連続
気孔を有する多孔質のビトリファイド砥石組織が構成さ
れる。このビトリファイド砥石組織は、たとえば、10
乃至230、この好ましくは20乃至200の範囲内の
集中度と、20乃至75容積%、好ましくは30乃至6
5容積%の気孔率を備えている。
Next, in a forming step 22, a raw material for the outer peripheral grindstone layer 14 and the inner peripheral grindstone layer 16 is filled in a predetermined press die and pressed to form a shape shown in FIG. . In the subsequent sintering step 24, the molded article is baked at a temperature of, for example, about 900 ° C. to obtain a segment chip grindstone 10 having a length of 40 mm, a width of 10.4 mm and a thickness of 7.4 mm, for example. In this firing step 24,
The binder contained in the raw material is eliminated, and the inorganic binder is melted to bind the abrasive grains to each other. As a result, a porous vitrified grindstone structure having a large number of continuous pores in which superabrasive grains are bound by the inorganic binder is formed. This vitrified whetstone structure is, for example, 10
To 230, preferably in the range of 20 to 200, and 20 to 75% by volume, preferably 30 to 6% by volume.
It has a porosity of 5% by volume.

【0019】一方、樹脂調合工程26では、たとえば液
状フェノール樹脂が調合されるとともに、固体潤滑剤と
して平均粒径が1μm以下の六方晶窒化ホウ素が上記フ
ェノール樹脂に対して1乃至80重量%の範囲内で混入
される。上記液状フェノール樹脂としては、たとえば住
友デュレズ株式会社製PR−9400を100重量部に
対して、電気化学株式会社製の六方晶窒化ホウ素である
デンカボロンナイトライドSP−2を15重量部混合
し、3分間攪拌した比較的低粘性のものが用いられる。
On the other hand, in the resin blending step 26, for example, a liquid phenol resin is blended, and hexagonal boron nitride having an average particle size of 1 μm or less as a solid lubricant in the range of 1 to 80% by weight based on the phenol resin. Mixed within. As the liquid phenolic resin, for example, 100 parts by weight of PR-9400 manufactured by Sumitomo Durez Co., Ltd., and 15 parts by weight of denkaboron nitride SP-2 which is hexagonal boron nitride manufactured by Electrochemical Co., Ltd. are mixed, A relatively low-viscosity material stirred for 3 minutes is used.

【0020】含浸工程28では、上記焼成工程24を経
た多数の連続気孔を有する多孔質のビトリファイド砥石
組織に、上記樹脂調合工程26で調合された液状フェノ
ール樹脂(熱硬化性樹脂)が含浸させられ、固体潤滑剤
も多孔質のビトリファイド砥石組織内に均一に分散させ
られる。たとえば、調合された流動状態の液状フェノー
ル樹脂をたとえば10mm程度の深さとなるように所定の
ステンレス容器内に収容するとともに、その容器内のフ
ェノール樹脂に成形および焼成後のセグメントチップ砥
石10を全部浸漬した状態で真空脱泡を行うことによ
り、樹脂含浸が行われる。しかし、多孔質のビトリファ
イド砥石組織を流動性のフェノール樹脂内に一部浸漬し
た状態で含浸させてもよい。
In the impregnation step 28, the liquid vitrified resin (thermosetting resin) prepared in the resin preparation step 26 is impregnated into the porous vitrified grindstone structure having a large number of continuous pores after the baking step 24. Also, the solid lubricant is uniformly dispersed in the porous vitrified grindstone structure. For example, the prepared liquid phenol resin in a fluidized state is accommodated in a predetermined stainless steel container so as to have a depth of, for example, about 10 mm, and the segment chip grindstone 10 after molding and firing is entirely immersed in the phenol resin in the container. The resin is impregnated by performing vacuum defoaming in this state. However, the porous vitrified grindstone structure may be impregnated in a state of being partially immersed in a fluid phenol resin.

【0021】硬化工程30では、上記含浸工程28でフ
ェノール樹脂が多孔質のビトリファイド砥石組織内に含
浸させられたセグメントチップ砥石10は、必要に応じ
て余分な樹脂が布などを用いて除去された後、たとえ
ば、所定の乾燥機内で180℃程度の乾燥温度で2時間
程度保持されることにより、フェノール樹脂が硬化させ
られる。
In the curing step 30, the segment chip grindstone 10 in which the phenolic resin is impregnated in the porous vitrified grindstone structure in the impregnation step 28 is used, if necessary, to remove excess resin using a cloth or the like. Thereafter, for example, the phenol resin is cured by being kept at a drying temperature of about 180 ° C. for about 2 hours in a predetermined dryer.

【0022】以上の工程を経て製造されたセグメントチ
ップ砥石10は、たとえば366mmφのコア部12の外
周面にたとえばエポキシ樹脂接着剤を用いて張り着けら
れ、たとえば図2に示す砥石車18が作成される。
The segment chip grindstone 10 manufactured through the above steps is adhered to the outer peripheral surface of the core portion 12 having a diameter of, for example, 366 mm by using an epoxy resin adhesive, for example, and the grinding wheel 18 shown in FIG. You.

【0023】上記のように構成された砥石車18におい
ては、セグメントチップ砥石10のビトリファイド砥石
組織内に含浸させられるフェノール樹脂の存在によって
気孔が埋められているので、研削中に被削材から発生す
る金属粉がチップポケットに詰まることがなく、溶着や
目詰まりの発生が好適に防止される。また、気孔を埋め
るフェノール樹脂は砥粒に比較して軟質であるので、被
削材に対しては凹んだ状態となるので、砥粒の破砕や脱
粒が適度に行われて研削焼けも好適に防止される。ま
た、フェノール樹脂は砥粒に比較して軟質であることか
ら、ビトリファイド砥石の特徴である目立ての容易性が
保持されつつ、砥石の欠けが好適に防止される。同時
に、無機結合剤により弱く保持されている砥粒はフェノ
ール樹脂によっても保持されることにより保持力が高め
られてその早期の脱粒が抑制されるので、高い研削比が
得られる。さらに、従来のビトリファイド砥石の製造工
程に樹脂含浸工程および樹脂硬化工程を加えるだけでよ
いので、特殊且つ能率の低い製造設備を用いるホットプ
レスなどに比較して、製品が安価となるだけでなく、製
造可能な砥石寸法の制限がない。しかも、ビトリファイ
ド砥石組織内に含浸させられるフェノール樹脂には固体
潤滑剤である六方晶窒化ホウ素が混入されて均一に分散
させられていることから、研削時において潤滑効果のあ
る研削液を用いないで、たとえば水或いは冷風のみでも
研削が可能となった。
In the grinding wheel 18 configured as described above, since the pores are filled by the presence of the phenol resin impregnated in the vitrified grinding wheel structure of the segment tip grinding wheel 10, the pores are generated from the work material during grinding. Thus, the metal powder does not clog the chip pocket, and the occurrence of welding and clogging is suitably prevented. In addition, since the phenol resin that fills the pores is softer than the abrasive grains, it is recessed with respect to the work material. Is prevented. Further, since the phenol resin is softer than the abrasive grains, chipping of the grindstone is suitably prevented while maintaining the ease of sharpening which is a feature of the vitrified grindstone. At the same time, the abrasive grains that are weakly held by the inorganic binder are also held by the phenolic resin, thereby increasing the holding power and suppressing the early degranulation, so that a high grinding ratio can be obtained. Furthermore, since it is only necessary to add the resin impregnating step and the resin curing step to the conventional vitrified grinding wheel manufacturing process, the product is not only inexpensive compared to hot press using special and inefficient manufacturing equipment, but also, There is no limit on the size of the grindstone that can be manufactured. In addition, the phenolic resin impregnated in the vitrified grindstone structure is mixed uniformly with hexagonal boron nitride, which is a solid lubricant, so that a grinding fluid having a lubricating effect is not used during grinding. For example, grinding can be performed only with water or cold air.

【0024】以下、上記のような工程で製造されたセグ
メントチップ砥石10を用いて、それに含浸硬化させら
れた固体潤滑剤を含むフェノール樹脂と砥石性能との関
係を明らかにする実験例を説明する。
Hereinafter, an experimental example will be described in which the relationship between the phenolic resin containing a solid lubricant impregnated and hardened into the segment tip grinding wheel 10 manufactured in the above-described process and the grinding wheel performance is described. .

【0025】[0025]

【実験例1】本実験例1において用いるセグメントチッ
プ砥石10が張り着けられるコア部12は中央部に取付
穴19を有する円板状スチール板製であり、そのセグメ
ントチップ砥石10の外周砥石層14および内周砥石層
16の調合は以下の通りである。 ・外周砥石層14 CBN砥粒(GE社製 Type-I #80/#100 ) 50.0(容量部) ビトリファイド結合剤 18.0(容量部) 糊量(粘結剤) 10.0(容量部) ・内周砥石層16 炭化珪素砥粒( #80) 50.0(容量部) ビトリファイド結合剤 18.0(容量部) 糊量(粘結剤) 10.0(容量部)
EXPERIMENTAL EXAMPLE 1 The core 12 to which the segment tip grinding wheel 10 used in the present experimental example 1 is attached is made of a disc-shaped steel plate having a mounting hole 19 in the center, and the outer peripheral grinding layer 14 of the segment tip grinding wheel 10 is provided. The composition of the inner peripheral grindstone layer 16 is as follows. -Outer peripheral grindstone layer 14 CBN abrasive (Type-I # 80 / # 100 manufactured by GE) 50.0 (volume part) Vitrified binder 18.0 (volume part) Glue amount (binder) 10.0 (volume) Part) ・ Inner circumference grindstone layer 16 Silicon carbide abrasive grains (# 80) 50.0 (volume part) Vitrified binder 18.0 (volume part) Glue amount (binder) 10.0 (volume part)

【0026】上記の配合に従って調合した原料をプレス
成形した生砥石を、900℃で5時間焼成して長さ70
mm、幅10.4mm、厚み7.4mmのセグメントチップ砥
石10を多数作成した。このときの外周砥石層14およ
び内周砥石層16の厚みはそれぞれ3.8mmおよび3.
6mmである。次いで、フェノール樹脂(住友デュレズ株
式会社製PR−9400)100.0重量部に、六方晶
窒化ホウ素(電気化学工業株式会社製SP−2)を15
重量部加え3分間攪拌して混合し、このフェノール樹脂
を前述の工程のように上記セグメントチップ砥石10に
含浸させて硬化させたものを実験例1とした。また、上
記六方晶窒化ホウ素を含まない他は同様にフェノール樹
脂を上記セグメントチップ砥石10に含浸させて硬化さ
せたものを比較例1とし、フェノール樹脂を含浸させな
いセグメントチップ砥石10を比較例2とした。表1
は、上記の実験例1、比較例1、比較例2の砥石構造を
示すものである。尚、表1の抗折強度の単位はMPaで
あり、他は体積%である。
The raw whetstone obtained by press-molding the raw material prepared according to the above-mentioned composition is fired at 900 ° C. for 5 hours to obtain a length 70 mm.
Many segment tip whetstones 10 mm, 10.4 mm in width, and 7.4 mm in thickness were prepared. At this time, the thicknesses of the outer peripheral grindstone layer 14 and the inner peripheral grindstone layer 16 are 3.8 mm and 3.0 mm, respectively.
6 mm. Next, 150.0 parts by weight of a phenolic resin (PR-9400 manufactured by Sumitomo Durez Co., Ltd.) was mixed with 15 parts of hexagonal boron nitride (SP-2 manufactured by Denki Kagaku Kogyo Co., Ltd.).
The phenol resin was impregnated into the segment chip grindstone 10 and hardened by impregnating the phenol resin with the phenol resin in the same manner as described above. In addition, except that the above-mentioned hexagonal boron nitride was not included, the segment chip grindstone 10 impregnated with the phenol resin and cured was set as Comparative Example 1, and the segment chip grindstone 10 not impregnated with the phenol resin was compared with Comparative Example 2. did. Table 1
Shows the grindstone structures of Experimental Example 1, Comparative Example 1, and Comparative Example 2 described above. In addition, the unit of the bending strength in Table 1 is MPa, and the others are% by volume.

【0027】[0027]

【表1】 CBN砥粒 無機結合剤 樹脂部 固体潤滑剤 気孔部 抗折強度 実施例1 50.0 18.0 21.4 2.8 7.8 65.0 比較例1 50.0 18.0 22.4 0.0 9.6 68.0 比較例2 50.0 18.0 0.0 0.0 32.0 52.0[Table 1] CBN abrasive grains Inorganic binder Resin part Solid lubricant Porous part Flexural strength Example 1 50.0 18.0 21.4 2.8 7.8 65.0 Comparative Example 1 50.0 18.0 22.4 0.0 9.6 68.0 Comparative Example 2 50.0 18.0 0.0 0.0 32.0 52.0

【0028】そして、以下に示す研削試験条件Iを行う
ことにより得られた上記の実験例1、比較例1、比較例
2の研削性能を表2に示す。また、上記研削試験条件I
に用いた研削液に代えて水道水を用いた場合の研削性能
を表3に示す。
Table 2 shows the grinding performance of Experimental Example 1, Comparative Example 1, and Comparative Example 2 obtained by performing the following grinding test conditions I. The above grinding test conditions I
Table 3 shows the grinding performance when tap water was used in place of the grinding fluid used in Example 1.

【0029】[0029]

【研削試験条件I】 砥石寸法 外径380mmφ×厚み10mm×内径80mm 使用機械 円筒研削盤 研削方式 湿式プランジ研削(エマルジョン系水溶性研削液) 砥石周速 160m/sec 被削材 SCM435 被削材寸法 外径60mmφ×幅5mm 取代 60mmφ→37mmφ 研削能率 70mm3 /mm[Grinding test condition I] Grinding wheel dimensions Outer diameter 380mmφ × Thickness 10mm × Inner diameter 80mm Machine used Cylindrical grinder Grinding method Wet plunge grinding (Emulsion water-soluble grinding fluid) Grinding wheel peripheral speed 160m / sec Work material SCM435 Work material size Outside diameter 60mmφ × width 5mm allowance 60mmφ → 37mmφ grinding efficiency 70mm 3 / mm

【0030】[0030]

【表2】 実施例1 比較例1 比較例2 砥石組織 樹脂含浸あり 樹脂含浸あり 樹脂含浸なし 固体潤滑剤あり 固体潤滑剤なし 固体潤滑剤なし 研削比 4000 2300 1200 加工面状態 研削焼けなし 研削焼け少しあり 研削焼けあり 切粉の溶着 なし あり あり 砥石の欠け なし なし あり [Table 2] Example 1 Comparative example 1 Comparative example 2 Grinding wheel structure With resin impregnation With resin impregnation Without resin impregnation With solid lubricant Without solid lubricant Without solid lubricant Grinding ratio 4000 2300 1200 Work surface condition No grinding burn Grinding burn Yes Grinding burns Yes Chip welding No Yes Yes Wheel chipping No No Yes

【0031】[0031]

【表3】 実施例1 比較例1 比較例2 砥石組織 樹脂含浸あり 樹脂含浸あり 樹脂含浸なし 固体潤滑剤あり 固体潤滑剤なし 固体潤滑剤なし 研削比 3000 1300 700 加工面状態 研削焼けなし 研削焼けあり 研削焼けあり 切粉の溶着 なし あり あり 砥石の欠け なし なし あり [Table 3] Example 1 Comparative example 1 Comparative example 2 Grinding wheel structure With resin impregnated With resin impregnated Without resin impregnated With solid lubricant Without solid lubricant Without solid lubricant Grinding ratio 3000 1300 700 Work surface condition Without grinding burn With grinding burn Grinding burns Yes Chip welding No Yes Yes Grinding chip missing No No Yes

【0032】表2から明らかなように、実施例1のセグ
メントチップ砥石は、比較例1および比較例2に比較し
て、研削比が1.7倍および3.3倍であって、摩耗が
少なく、加工面状態も研削焼けがなく比較例1に比較し
て良好である。また、切粉の溶着もなく、高価なビトリ
ファイド超砥粒砥石を有効に使用できる。また、表3か
ら明らかなように、研削液に代えて水道水を用いた場合
でも、実施例1のセグメントチップ砥石は、比較例1お
よび比較例2に比較して、研削比が2.3倍および4.
2倍であって、摩耗が少なく、加工面状態も研削焼けが
なく比較例1に比較して良好である。
As is clear from Table 2, the segment tip grindstone of Example 1 has a grinding ratio of 1.7 times and 3.3 times as compared with Comparative Examples 1 and 2, and has less wear. There is little grinding surface, and there is no grinding burn. Further, there is no welding of chips, and an expensive vitrified superabrasive grindstone can be effectively used. Further, as is clear from Table 3, even when tap water is used in place of the grinding fluid, the segment tip grindstone of Example 1 has a grinding ratio of 2.3 as compared with Comparative Examples 1 and 2. 3. and 4.
It is twice as much, and has less wear, and the machined surface condition is free of grinding burns and is better than Comparative Example 1.

【0033】以上、本発明の一実施例を図面を用いて説
明したが、本発明はその他の態様においても適用され
る。
While the embodiment of the present invention has been described with reference to the drawings, the present invention can be applied to other embodiments.

【0034】たとえば、前述の実施例では、ビトリファ
イド砥石組織内に含浸させられる熱硬化性樹脂として、
フェノール樹脂が用いられていたが、1液性或いは2液
性のエポキシ樹脂であってもよいし、ウレタン樹脂、ポ
リビニールアルコールなどの熱可塑性の液状樹脂であっ
てもよい。2液性のエポキシ樹脂の場合には、たとえ
ば、ビスフェノールAなどの流動性(液状)のエポキシ
樹脂主剤にポリアミド系樹脂などから成る流動性(液
状)の硬化剤が混合される。
For example, in the above embodiment, the thermosetting resin impregnated in the vitrified grindstone structure is:
Although a phenol resin has been used, a one-part or two-part epoxy resin may be used, or a thermoplastic liquid resin such as a urethane resin or polyvinyl alcohol may be used. In the case of a two-component epoxy resin, for example, a fluid (liquid) curing agent made of a polyamide resin or the like is mixed with a fluid (liquid) epoxy resin base such as bisphenol A.

【0035】また、前述の実施例のセグメントチップ砥
石10は、専ら研磨に関与する外周砥石層14とそれを
バックアップするための内周砥石層16とから構成され
ていたが、全体が外周砥石層14と同様の組成により構
成されても差し支えないし、棒状のホーニング砥石、ブ
ロック状の超仕上げ砥石であってもよい。
Further, the segment tip grinding wheel 10 of the above-described embodiment is composed of the outer grinding wheel layer 14 exclusively involved in polishing and the inner grinding wheel layer 16 for backing it up. The composition may be the same as the composition of No. 14, and a rod-shaped honing stone or a block-shaped super-finishing stone may be used.

【0036】また、前述の実施例のセグメントチップ砥
石10の外周砥石層14は、CBN砥粒を含むものであ
ったが、ダイヤモンド砥粒であってもよいし、アランダ
ム(溶融アルミナ質砥粒)、カーボランダム(炭化珪素
質砥粒)などの他の一般砥粒であっても差し支えない。
Further, although the outer peripheral grindstone layer 14 of the segment tip grindstone 10 of the above-described embodiment contains CBN abrasive grains, it may be diamond abrasive grains or alundum (fused alumina abrasive grains). ) And other general abrasive grains such as carborundum (silicon carbide abrasive grains).

【0037】また、前述の実施例のセグメントチップ砥
石10は、所定厚みの円環状部材が分割された形状に成
形されていたが、円環状に一体に成形されたものであっ
てもよい。
Although the segment tip grinding wheel 10 of the above-described embodiment is formed into a shape in which an annular member having a predetermined thickness is divided, it may be integrally formed in an annular shape.

【0038】なお、上述したのはあくまでも本発明の一
実施例であり、本発明はその主旨を逸脱しない範囲にお
いて種々の変更が加えられ得るものである。
The above is merely an example of the present invention, and the present invention can be variously modified without departing from the gist of the present invention.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例の固体潤滑剤を含む樹脂含浸
ビトリファイド砥石であるセグメントチップ砥石を示す
斜視図である。
FIG. 1 is a perspective view showing a segment tip grinding wheel which is a resin-impregnated vitrified grinding wheel containing a solid lubricant according to one embodiment of the present invention.

【図2】図1のセグメントチップ砥石が外周面に張り着
けられた砥石車を示す斜視図である。
FIG. 2 is a perspective view showing a grinding wheel in which the segment tip grinding wheel of FIG. 1 is attached to an outer peripheral surface.

【図3】図1のセグメントチップ砥石の製造工程を説明
する図である。
FIG. 3 is a view for explaining a manufacturing process of the segment tip grinding wheel of FIG. 1;

【符号の説明】[Explanation of symbols]

10:セグメントチップ砥石(固体潤滑剤を含む樹脂含
浸ビトリファイド砥石) 14:外周砥石層 16:内周砥石層
10: Segment chip grindstone (resin impregnated vitrified grindstone containing solid lubricant) 14: Outer grindstone layer 16: Inner grindstone layer

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) B24D 3/02 310 B24D 3/02 310A 3/14 3/14 C10M 103/00 C10M 103/00 A Fターム(参考) 3C063 AA02 AB03 BA03 BA12 BA34 BB02 BC05 BC09 BD01 CC22 FF20 FF22 FF23 FF30 4H104 AA04A AA19A AA24R AA26A CB12A CB12C EA08A FA06 LA03 LA20 QA11 QA13 RA01 RA03 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B24D 3/02 310 B24D 3/02 310A 3/14 3/14 C10M 103/00 C10M 103/00 A F term (Reference) 3C063 AA02 AB03 BA03 BA12 BA34 BB02 BC05 BC09 BD01 CC22 FF20 FF22 FF23 FF30 4H104 AA04A AA19A AA24R AA26A CB12A CB12C EA08A FA06 LA03 LA20 QA11 QA13 RA01 RA03

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 砥粒、或いは砥粒と骨材が無機結合剤に
より結合されたビトリファイド砥石組織を備えたビトリ
ファイド砥石であって、 前記ビトリファイド砥石組織内の空隙内に、固体潤滑剤
を含む樹脂が含浸させられて硬化させられていることを
特徴とする固体潤滑剤を含む樹脂含浸ビトリファイド砥
石。
1. A vitrified grindstone having a vitrified grindstone structure in which abrasive grains or an abrasive grain and an aggregate are bonded by an inorganic binder, wherein a resin containing a solid lubricant is contained in a void in the vitrified grindstone structure. A resin-impregnated vitrified grinding wheel containing a solid lubricant, wherein the resin is impregnated and cured.
【請求項2】 前記樹脂は、フェノール樹脂およびエポ
キシ樹脂から選択された少なくとも1種類の熱硬化性樹
脂である請求項1の固体潤滑剤を含む樹脂含浸ビトリフ
ァイド砥石。
2. The resin-impregnated vitrified grinding wheel containing a solid lubricant according to claim 1, wherein the resin is at least one kind of thermosetting resin selected from a phenol resin and an epoxy resin.
【請求項3】 前記砥粒は、ダイヤモンド砥粒、或いは
CBN砥粒である請求項1の固体潤滑剤を含む樹脂含浸
ビトリファイド砥石。
3. The resin-impregnated vitrified grinding wheel containing a solid lubricant according to claim 1, wherein the abrasive grains are diamond abrasive grains or CBN abrasive grains.
【請求項4】 前記固体潤滑剤は、六方晶窒化ホウ素で
ある請求項1の固体潤滑剤を含む樹脂含浸ビトリファイ
ド砥石。
4. The resin-impregnated vitrified grinding wheel containing a solid lubricant according to claim 1, wherein the solid lubricant is hexagonal boron nitride.
【請求項5】 前記固体潤滑剤は、前記樹脂に対して1
乃至80重量%の範囲で含まれるものである請求項1の
固体潤滑剤を含む樹脂含浸ビトリファイド砥石。
5. The solid lubricant according to claim 1, wherein
The resin-impregnated vitrified whetstone containing a solid lubricant according to claim 1, which is contained in an amount of from 80 to 80% by weight.
JP02627399A 1999-02-03 1999-02-03 Resin-impregnated vitrified grinding wheel containing solid lubricant Expired - Fee Related JP3553810B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP02627399A JP3553810B2 (en) 1999-02-03 1999-02-03 Resin-impregnated vitrified grinding wheel containing solid lubricant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP02627399A JP3553810B2 (en) 1999-02-03 1999-02-03 Resin-impregnated vitrified grinding wheel containing solid lubricant

Publications (2)

Publication Number Publication Date
JP2000226568A true JP2000226568A (en) 2000-08-15
JP3553810B2 JP3553810B2 (en) 2004-08-11

Family

ID=12188689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP02627399A Expired - Fee Related JP3553810B2 (en) 1999-02-03 1999-02-03 Resin-impregnated vitrified grinding wheel containing solid lubricant

Country Status (1)

Country Link
JP (1) JP3553810B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002052472A (en) * 2000-08-10 2002-02-19 Nippon G C Kogyo Kk Self-lubricating grinding wheel and its manufacturing method
WO2007077675A1 (en) * 2005-12-28 2007-07-12 Toyoda Van Moppes Ltd. Segment magnet and process for producing the same
JP2008105150A (en) * 2006-10-26 2008-05-08 Noritake Co Ltd Grinding wheel for mirror surface finishing
WO2010013580A1 (en) * 2008-07-31 2010-02-04 株式会社ノリタケカンパニーリミテド Vitrified grindstone
CN102615587A (en) * 2012-04-08 2012-08-01 无锡市飞云球业有限公司 Grinding process for high-precision steel bearing ball for automobile
EP3341433B1 (en) 2015-08-24 2019-07-24 Morgan Advanced Materials And Technology, Inc Preparation of articles comprising graphitic particles

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002052472A (en) * 2000-08-10 2002-02-19 Nippon G C Kogyo Kk Self-lubricating grinding wheel and its manufacturing method
WO2007077675A1 (en) * 2005-12-28 2007-07-12 Toyoda Van Moppes Ltd. Segment magnet and process for producing the same
US8033278B2 (en) 2005-12-28 2011-10-11 Toyoda Van Moppes Ltd. Segmented grinding wheel and manufacturing method therefor
JP5178205B2 (en) * 2005-12-28 2013-04-10 豊田バンモップス株式会社 Segment grindstone and manufacturing method thereof
JP2008105150A (en) * 2006-10-26 2008-05-08 Noritake Co Ltd Grinding wheel for mirror surface finishing
WO2010013580A1 (en) * 2008-07-31 2010-02-04 株式会社ノリタケカンパニーリミテド Vitrified grindstone
JP2010036266A (en) * 2008-07-31 2010-02-18 Noritake Co Ltd Vitrified grindstone
US8568499B2 (en) 2008-07-31 2013-10-29 Noritake Co., Limited Vitrified grinding stone
CN102615587A (en) * 2012-04-08 2012-08-01 无锡市飞云球业有限公司 Grinding process for high-precision steel bearing ball for automobile
EP3341433B1 (en) 2015-08-24 2019-07-24 Morgan Advanced Materials And Technology, Inc Preparation of articles comprising graphitic particles
US11136269B2 (en) 2015-08-24 2021-10-05 Morgan Advanced Materials And Technology, Inc. Preparation of articles comprising graphitic particles
EP3341433B2 (en) 2015-08-24 2023-12-06 Morgan Advanced Materials And Technology, Inc Preparation of articles comprising graphitic particles

Also Published As

Publication number Publication date
JP3553810B2 (en) 2004-08-11

Similar Documents

Publication Publication Date Title
JP3373797B2 (en) Resin-impregnated reinforced vitrified grinding wheel and method of manufacturing the same
EP2219824B1 (en) Abrasive processing of hard and/or brittle materials
KR100359401B1 (en) Abrasive Tools
JP3795778B2 (en) Resinoid grinding wheel using hydrogenated bisphenol A type epoxy resin
JP2001205566A (en) Resin-impregnated vitrified grinding wheel and its manufacturing method
EP1066134B1 (en) Abrasive tools
EP1781449B1 (en) Method of centerless grinding
JP2010046761A (en) Resinoid super abrasive grain grinding wheel for working plateau surface
JP3553810B2 (en) Resin-impregnated vitrified grinding wheel containing solid lubricant
JP3086667B2 (en) Super abrasive whetstone
US6428587B1 (en) Vitrified abrasive solid mass having pores filled with resin, and solid lubricant agent
JP2000198075A (en) Composite bond grinding wheel and grind wheel having resin binder phase
JPH0624700B2 (en) Vitrified grindstone
JP2000246647A (en) Vitrified extra-abrasive grain grinding wheel and manufacture thereof
KR20090091999A (en) Oil impregnated vitrified grinding wheel
JP2007260810A (en) Resin-impregnated grindstone
Azarhoushang Abrasive tools
KR100334430B1 (en) Tip manufacturing method of grinding wheel
JPS60186376A (en) Abrasive molded body
JP2005246569A (en) Resinoid grinding wheel for mirror grinding
TW201902628A (en) A porous abrasive clusters, a grinding tool and method for making the porous abrasive clusters
JP2001009732A (en) Vitrified bond grinding wheel and manufacture therefor
JP2915425B2 (en) Honing wheel for soft alloy containing hard material
JP3273020B2 (en) Method for producing vitrified grinding stone from grinding stone waste
JPH07251379A (en) Porous metal bond grinding wheel and its manufacture

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040203

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040324

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040420

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040430

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090514

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090514

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100514

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110514

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110514

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120514

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120514

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130514

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140514

Year of fee payment: 10

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees