JP2001038634A - Vitrified grinding wheel - Google Patents
Vitrified grinding wheelInfo
- Publication number
- JP2001038634A JP2001038634A JP11221542A JP22154299A JP2001038634A JP 2001038634 A JP2001038634 A JP 2001038634A JP 11221542 A JP11221542 A JP 11221542A JP 22154299 A JP22154299 A JP 22154299A JP 2001038634 A JP2001038634 A JP 2001038634A
- Authority
- JP
- Japan
- Prior art keywords
- abrasive grains
- grinding
- alumina
- ceramic
- grinding 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.)
- Granted
Links
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- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、研削砥石の技術分
野に属するものであり、特に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 the technical field of grinding wheels, and more particularly to a vitrified grinding wheel.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】結合材
により砥粒を結合保持してなる研削砥石の研削性能を維
持するためには、切れ味の低下した砥粒を周囲の結合材
とともに脱落させ新規な砥粒を露出させること（自生発
刃）が必要であるとされている。更に、研削時の目詰ま
りなどの発生を防止し、被研削物の切粉（切屑）の排出
を容易にして良好な切れ味での研削を行うためには、砥
石中に適度な気孔を確保することが必要であるとされて
いる。また、良好な切れ味での研削を継続し、砥石の形
くずれを生じないようにするためには、適宜、ドレス
（ドレッシング）を行う必要があるが、ドレスを要する
間隔（ドレス後に次回のドレスを必要とするまでの被研
削物の研削量に対応する）を長くすることができれば、
研削効率の向上が得られる。2. Description of the Related Art In order to maintain the grinding performance of a grinding wheel in which abrasive grains are bonded and held by a binder, the abrasive grains with reduced sharpness are dropped together with the surrounding binder. It is said that it is necessary to expose new abrasive grains (self-generated blades). Furthermore, in order to prevent the occurrence of clogging at the time of grinding and to facilitate the discharge of chips (chips) from the object to be ground and perform grinding with good sharpness, secure an appropriate pore in the grindstone. It is said that it is necessary. In addition, in order to continue grinding with good sharpness and prevent the whetstone from deforming, it is necessary to perform dressing (dressing) as appropriate. (Corresponding to the grinding amount of the object to be ground until it is needed)
Improved grinding efficiency can be obtained.
【０００３】従来、砥石の切れ味の持続のために自生発
刃即ち砥粒脱落を促進する技術が種々提案されている。
しかしながら、これらの従来技術では、研削比が低下
し、ドレス間隔が短くなるので、研削効率が低いという
問題点がある。[0003] Conventionally, various techniques have been proposed for accelerating the spontaneous blade generation, that is, the removal of abrasive grains for maintaining the sharpness of the grindstone.
However, these conventional techniques have a problem that the grinding efficiency is low because the grinding ratio is reduced and the dress interval is shortened.
【０００４】そこで、本発明は、上記従来技術の問題点
を解決し、良好な切れ味と高い研削比とを長期にわたっ
て維持することができ、形くずれが生じにくくドレス間
隔を長くすることができ、良好な研削効率を得ることの
できるビトリファイド砥石を提供することを目的とする
ものである。Therefore, the present invention solves the above-mentioned problems of the prior art, can maintain good sharpness and a high grinding ratio for a long period of time, can hardly lose shape, and can increase the dress interval. It is an object of the present invention to provide a vitrified grinding wheel capable of obtaining good grinding efficiency.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、以上の
如き目的を達成するものとして、セラミック砥粒及びそ
の他の砥粒をビトリファイド系結合材を用いて結合して
なり、前記その他の砥粒は白色アルミナ砥粒、淡紅色ア
ルミナ砥粒及び解砕型アルミナ砥粒のうちの少なくとも
１種であり、前記セラミック砥粒と前記その他の砥粒と
の合計に対する前記セラミック砥粒の割合が３〜２０体
積％であることを特徴とするビトリファイド砥石、が提
供される。According to the present invention, in order to achieve the above object, ceramic abrasive grains and other abrasive grains are combined by using a vitrified binder, and the other abrasive grains are used. The grains are at least one of white alumina grains, light red alumina grains and crushed alumina grains, and the ratio of the ceramic grains to the total of the ceramic grains and the other grains is 3%. Vitrified whetstone, characterized in that the writting stone is at most 20% by volume.
【０００６】本発明の一態様においては、前記解砕型ア
ルミナ砥粒は単結晶からなる。本発明の一態様において
は、前記解砕型アルミナ砥粒は機械的粉砕処理を経て作
製されたものである。本発明の一態様においては、前記
解砕型アルミナ砥粒は加熱・急冷により内部応力を高め
る処理を経て作製されたものである。In one aspect of the present invention, the crushed alumina abrasive grains are made of a single crystal. In one embodiment of the present invention, the crushed alumina abrasive grains are produced through a mechanical crushing process. In one embodiment of the present invention, the crushed alumina abrasive grains are produced through a process of increasing internal stress by heating and quenching.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。Embodiments of the present invention will be described below.
【０００８】本発明で用いられるセラミック砥粒は、微
小な粒径を持つ一次粒子を適当なバインダーとともに燒
結して適宜の粒径を持つ二次粒子となしたものである。
一次粒子としては、例えばゾル−ゲル法により作製した
粒径１μｍ程度の酸化アルミニウム粒子を用いることが
できる。The ceramic abrasive used in the present invention is obtained by sintering primary particles having a small particle size with a suitable binder to form secondary particles having a proper particle size.
As the primary particles, for example, aluminum oxide particles having a particle diameter of about 1 μm produced by a sol-gel method can be used.
【０００９】本発明で用いられるセラミック砥粒以外の
「その他の砥粒」としては、白色アルミナ砥粒、淡紅色
アルミナ砥粒及び解砕型アルミナ砥粒を挙げることがで
きる。これらは、それぞれ、ＪＩＳ−Ｒ６１１１に規定
されている白色アルミナ質研削材（ＷＡ）、淡紅色アル
ミナ質研削材（ＰＡ）及び解砕型アルミナ質研削材（Ｈ
Ａ）からなる。これらの砥粒は１種類を単独で「その他
の砥粒」として用いてもよいし、複数種類を混合したも
のを「その他の砥粒」として用いてもよい。Examples of the "other abrasive grains" other than the ceramic abrasive grains used in the present invention include white alumina abrasive grains, light red alumina abrasive grains, and crushed alumina abrasive grains. These are white alumina-based abrasive (WA), light red alumina-based abrasive (PA) and crushed alumina-based abrasive (H) specified in JIS-R6111, respectively.
A). One kind of these abrasive grains may be used alone as “other abrasive grains”, or a mixture of a plurality of kinds may be used as “other abrasive grains”.
【００１０】セラミック砥粒や「その他の砥粒」の粒度
は、特に制限がなく、従来研削砥石において砥粒として
使用されている粒度（例えば＃８〜＃３０００）は使用
可能である。セラミック砥粒の粒度と「その他の砥粒」
の粒度とは、同程度であってもよいし、異なってもよ
い。[0010] The particle size of the ceramic abrasive particles or "other abrasive particles" is not particularly limited, and the particle sizes (for example, # 8 to # 3000) conventionally used as abrasive particles in a grinding wheel can be used. Grain size of ceramic abrasives and "other abrasives"
May be the same or different.
【００１１】上記解砕型アルミナ砥粒の製造方法として
は、溶融アルミナを溶解凝固させる際にアルミナ結晶の
粒界に水溶性のマトリックスを生成させ水中に凝固塊を
投入して粒子を得る方法があるが、機械的粉砕を用いて
粒子化することも可能である。本発明においては、解砕
型アルミナ砥粒は、粒子の先端に極めて鋭い形状を付与
することができる点で機械的粉砕処理を用いて単結晶粒
子を製造するのが好ましい。解砕型アルミナ砥粒として
粒子先端が鋭い形状のものを用いることで、砥石の切れ
味は良好になる。As a method for producing the above-mentioned crushed alumina abrasive grains, there is a method of producing a water-soluble matrix at the grain boundaries of alumina crystals when melting and solidifying molten alumina, and then pouring a solidified mass into water to obtain particles. However, it is also possible to granulate using mechanical grinding. In the present invention, it is preferable that the crushed alumina abrasive grains be produced by mechanical pulverization to produce single crystal particles in that a very sharp shape can be imparted to the tip of the particles. By using a crushed alumina abrasive having a sharp particle tip, the sharpness of the grinding wheel is improved.
【００１２】また、解砕型アルミナ砥粒は、ＨＡをその
まま使用してもよいが、これに加熱・急冷処理を施した
ものを用いてもよい。この加熱・急冷処理は、砥粒の内
部応力を高めマイクロクラックを生じやすくする処理と
して行われ、具体的にはアルミナ系粒子を７００℃以上
で該アルミナ系粒子の融点未満の温度に加熱し、その後
に０℃以上１００℃以下に急冷することで行われる。As the crushed alumina abrasive grains, HA may be used as it is, or may be subjected to a heating / quenching treatment. This heating / quenching treatment is performed as a treatment for increasing the internal stress of the abrasive grains and easily causing microcracks. Specifically, the alumina-based particles are heated to a temperature of 700 ° C. or higher and lower than the melting point of the alumina-based particles, Thereafter, the cooling is performed by rapidly cooling the temperature to 0 ° C or more and 100 ° C or less.
【００１３】この急冷により、アルミナ系粒子には内部
応力が発生し又はアルミナ系粒子の内部応力が増大す
る。急冷後のアルミナ系粒子の内部応力の大きさは、外
力が印加されない場合には粒子にマイクロクラックを生
じさせることのない程度の大きさである。The quenching causes internal stress to be generated in the alumina-based particles or increases the internal stress of the alumina-based particles. The magnitude of the internal stress of the quenched alumina-based particles is such that microcracks do not occur in the particles when no external force is applied.
【００１４】本発明で用いられるビトリファイド結合材
としては、例えばＳｉＯ2 及びＡｌ 2 Ｏ3 を含み更にＭ
ｇＯ，ＣａＯ，Ｋ2Ｏその他の成分のうちのいくつかを
含むものを用いることができる。Vitrified binder used in the present invention
As, for example, SiOTwoAnd Al TwoOThreeAnd further M
gO, CaO, KTwoO some of the other ingredients
Can be used.
【００１５】本発明においては、セラミック砥粒をアル
ミナ系の「その他の砥粒」と併用することで、ビトリフ
ァイド結合材からの砥粒の過度の脱落を抑制し、砥石の
低研削比及び形くずれ易さを改善することができ、ドレ
ス間隔を長くしても良好な研削を継続することができ、
研削効率の向上が実現される。これは、セラミック砥粒
の表面が平滑ではなく微細な多数の凹凸を有することに
より、ビトリファイド結合材によるセラミック砥粒の担
持力が高くなり、セラミック砥粒の脱落が抑制されるこ
とで周囲のアルミナ系の「その他の砥粒」の容易な脱落
をも抑制するためであると考えられる。即ち、本発明の
砥石においては、セラミック砥粒がアルミナ系の「その
他の砥粒」の脱落時期の延長作用をなしていると考えら
れ、セラミック砥粒の割合を調節することで、研削性能
の観点から望ましい脱落時期延長の後にアルミナ系の
「その他の砥粒」を脱落させることができる。In the present invention, by using ceramic abrasive grains in combination with alumina-based "other abrasive grains", excessive dropping of abrasive grains from the vitrified binder is suppressed, and a low grinding ratio and deformation of the grinding wheel are achieved. Easiness can be improved, good grinding can be continued even if the dress interval is lengthened,
Improvement in grinding efficiency is realized. This is because the surface of the ceramic abrasive grains is not smooth but has a large number of fine irregularities, so that the supporting force of the ceramic abrasive grains by the vitrified binder is increased, and the falling of the ceramic abrasive grains is suppressed, so that the surrounding alumina is suppressed. It is considered that this is also to suppress the easily falling off of "other abrasive grains" of the system. That is, in the grindstone of the present invention, it is considered that the ceramic abrasive grains have an effect of extending the falling time of the alumina-based "other abrasive grains", and by adjusting the ratio of the ceramic abrasive grains, the grinding performance is improved. The alumina-based "other abrasive grains" can be dropped off after a desirable drop-out time is extended from the viewpoint.
【００１６】このような効果は、特に、セラミック砥粒
とアルミナ系の「その他の砥粒」との合計に対する前記
セラミック砥粒の割合が３〜２０体積％好ましくは５〜
１８体積％更に好ましくは７〜１５体積％の時に顕著と
なる。セラミック砥粒の割合が３体積％未満で小さくな
るにつれて、アルミナ系の「その他の砥粒」の脱落の頻
度が高くなり過ぎて砥石の摩耗が速くなり研削比が低下
し砥石の形くずれが発生し易くなる。また、セラミック
砥粒の割合が２０体積％を越えて大きくなるにつれて、
アルミナ系の「その他の砥粒」の脱落の頻度が小さくな
り過ぎて砥石の切れ味が低下し易くなる。Such an effect is particularly obtained when the ratio of the ceramic abrasive grains to the total of the ceramic abrasive grains and the alumina-based "other abrasive grains" is 3 to 20% by volume, preferably 5 to 20% by volume.
It becomes significant when the content is 18% by volume, more preferably 7 to 15% by volume. As the ratio of ceramic abrasive grains becomes smaller at less than 3% by volume, the frequency of dropping of alumina-based "other abrasive grains" becomes too high, and the wear of the grinding stone becomes faster, the grinding ratio decreases, and the grinding wheel loses its shape. Easier to do. Also, as the ratio of the ceramic abrasive grains increases beyond 20% by volume,
The frequency of falling off of the alumina-based "other abrasive grains" becomes too small, so that the sharpness of the grindstone is easily reduced.
【００１７】本発明によるビトリファイド砥石は、例え
ばＳＣ材、ＳＣＭ材、ＳＫＨ材、ＳＫＤ材、ＳＵＳ材な
どの鋼材の研削に最適である。The vitrified grindstone according to the present invention is most suitable for grinding steel materials such as SC material, SCM material, SKH material, SKD material and SUS material.
【００１８】砥石を用いて被研削物の研削を行うと、研
削が進行して砥粒が摩滅するに従い研削抵抗が大きくな
り、砥粒脱落が起こり易くなる。本発明の砥石では、セ
ラミック砥粒はアルミナ系の「その他の砥粒」より結合
材よる担持結合力が大きいので、先ず「その他の砥粒」
が脱落するが、上記のようにその脱落時期は延長され、
更にその脱落の際にもセラミック砥粒による研削が継続
するので、砥石の形くずれが抑制され、ドレス間隔を長
くしても、良好な研削を継続することができる。特に、
本発明では、「その他の砥粒」としてアルミナ系の砥粒
を用いているので、脱落時期を延長された「その他の砥
粒」による研削力の低下は小さく、研削比向上及びドレ
ス間隔延長の効果が著しい。When an object to be ground is ground using a grindstone, the grinding resistance increases as the grinding proceeds and the abrasive grains wear out, and the abrasive grains easily fall off. In the grindstone of the present invention, since the ceramic abrasive grains have a larger binding force by the binder than the alumina-based "other abrasive grains", first the "other abrasive grains"
Falls off, but the dropout period is extended as described above,
Further, since the grinding with the ceramic abrasive grains is continued even when it falls off, the shape of the grindstone is suppressed, and even if the dress interval is lengthened, good grinding can be continued. In particular,
In the present invention, since the alumina-based abrasive grains are used as the "other abrasive grains", the drop in the grinding force due to the extended "other abrasive grains" is small, and the grinding ratio is improved and the dress interval is extended. The effect is remarkable.
【００１９】尚、上記加熱・急冷処理を行った解砕型ア
ルミナ砥粒を用いた場合には、この砥粒には、相当の内
部応力が存在し歪みを生じているので、研削の進行によ
り研削抵抗が大きくなり砥粒に印加される外力が増加し
た場合には、解砕型アルミナ砥粒の露出表面にマイクロ
クラックが発生し、ここから砥粒の一部（摩滅表面を有
する先端部）が破砕除去される。これにより、当該砥粒
の残りの部分の露出表面には破砕により新たな鋭敏な切
刃が生じているので、研削抵抗が更に増加することなく
切れ味の良い研削を継続できる。しかも、砥粒が自己の
部分破壊により切刃再生をするので、砥粒を有効に利用
でき、砥石の損耗が少なく、研削比を飛躍的に向上させ
ることができる。When crushed alumina abrasive grains subjected to the above-mentioned heating / quenching treatment are used, the abrasive grains have a considerable internal stress and are distorted. When the grinding force increases and the external force applied to the abrasive grains increases, microcracks occur on the exposed surface of the crushed alumina abrasive grains, and a part of the abrasive grains (tips having a worn surface) from there. Is crushed and removed. As a result, a new sharp cutting edge is generated by crushing on the exposed surface of the remaining portion of the abrasive grains, so that sharp grinding can be continued without further increasing the grinding resistance. In addition, since the abrasive grains regenerate the cutting edge by their own partial destruction, the abrasive grains can be used effectively, the wear of the grindstone is small, and the grinding ratio can be greatly improved.
【００２０】[0020]
【実施例】以下、実施例及び加工例をもって本発明を詳
細に説明する。The present invention will be described in detail below with reference to working examples and working examples.
【００２１】実施例：セラミック砥粒（Ｚ）として、ゾ
ル−ゲル法により作製した粒径１μｍ程度の酸化アルミ
ニウムからなる一次粒子をバインダーとともに燒結して
粒度＃８０の二次粒子となしたものを用いた。 Example : Ceramic abrasive grains (Z) obtained by sintering primary particles made of aluminum oxide having a particle size of about 1 μm and produced by a sol-gel method together with a binder to form secondary particles having a particle size of # 80. Using.
【００２２】また、「その他の砥粒」として、粒度＃８
０の、解砕型アルミナ砥粒（ＨＡ）、白色アルミナ砥粒
（ＷＡ）及び淡紅色アルミナ砥粒（ＰＡ）を用いた。Further, as “other abrasive grains”, a grain size # 8
No. 0, crushed alumina abrasive grains (HA), white alumina abrasive grains (WA) and light red alumina abrasive grains (PA) were used.
【００２３】尚、解砕型アルミナ砥粒（ＨＡ）は、機械
粉砕により作製した単結晶からなる鋭い先端をもつもの
を用い、一部の実施例では、この解砕型アルミナ砥粒
（ＨＡ）に対して、ｐＨ８の雰囲気下で１０００℃で１
時間加熱し、次いで１５℃のｐＨ５のＨＣｌ水溶液中に
浸漬することで、加熱・急冷処理を施したものを用い
た。As the crushed alumina abrasive (HA), one having a sharp tip made of a single crystal produced by mechanical pulverization is used. In some embodiments, the crushed alumina abrasive (HA) is used. To 1000 ° C. in an atmosphere of pH 8
After heating for an hour and then immersing in a 15 ° C. aqueous solution of HCl having a pH of 5, a material subjected to a heating / quenching treatment was used.
【００２４】また、白色アルミナ砥粒（ＷＡ）は、アル
ミナ質９９．６％の高純度のものを用いた。淡紅色アル
ミナ砥粒（ＰＡ）は、Ｃｒ2 Ｏ3 を２重量％含有するも
のを用いた。The white alumina abrasive grains (WA) used had a high purity of 99.6% alumina. As the light red alumina abrasive grains (PA), those containing 2% by weight of Cr 2 O 3 were used.
【００２５】以上の砥粒を、表１に示すような体積割合
で混合し、ビトリファイド結合材（ＳｉＯ2 ＝７０重量
％；Ａｌ2 Ｏ3 ＝１７重量％；ＭｇＯ＝３重量％；その
他１０重量％）と混合してホイール形状にプレス成形し
１２５０℃で焼成することにより、ビトリファイド砥石
を作製した。The above abrasive grains were mixed in a volume ratio as shown in Table 1, and a vitrified binder (SiO 2 = 70% by weight; Al 2 O 3 = 17% by weight; MgO = 3% by weight; other 10% by weight) %), Press-molded into a wheel shape, and fired at 1250 ° C. to produce a vitrified grindstone.
【００２６】加工例：以上の実施例で得られたビトリフ
ァイド砥石を用いて、鋼材（ＳＫＤ１１焼入）の表面を
研削加工した。テーブル送り速度を１５ｍ／分とし、砥
石の周速を１８００ｍ／分とし、設定切込量を１パス当
たり２０μｍとして加工した。 Working Example : The surface of a steel material (quenched SKD11) was ground using the vitrified grindstone obtained in the above embodiment. The table was fed at a speed of 15 m / min, the peripheral speed of the grindstone was set at 1800 m / min, and the cut depth was set at 20 μm per pass.
【００２７】砥石のドレスは、ドレッサーとして６．５
ｍｍφのインプリドレッサー＃３０を用い、砥石周速１
８００ｍ／分とし、リード０．１ｍｍ／回転とし、切込
量３０μｍ／パスとし、ドレス量０．３ｍｍとして、行
った。The dress of the whetstone is 6.5 as a dresser.
mmφ Imped Dresser # 30, whetstone peripheral speed 1
The test was performed at 800 m / min, with a lead of 0.1 mm / rotation, a cutting depth of 30 μm / pass, and a dressing of 0.3 mm.
【００２８】以上のような条件で加工した場合の、砥石
摩耗量［一定量の被研削物の研削後の砥石半径減少
量］、研削比、研削面粗さ［一定量の被研削物の研削後
の表面粗さＲａ］、研削抵抗［一定量の被研削物の研削
後の研削抵抗：電流値による］、及びドレス間隔［被研
削物の表面粗さＲａが或る値に達するまでの被研削物の
研削量］を調べたところ、表１に示すような結果が得ら
れた。尚、これら表１に示される数値は、各実施例にお
いて、セラミック砥粒を使用しない比較例のものを１．
００とする相対値で表されている。表１において、「そ
の他の砥粒」は符号Ｘで示されている。In the case of machining under the above conditions, the amount of wear of the grindstone [amount of decrease in the radius of the grindstone after grinding a fixed amount of the workpiece], the grinding ratio, and the roughness of the ground surface [the grinding of the fixed amount of the workpiece] Surface roughness Ra], grinding resistance [grinding resistance after grinding a fixed amount of the workpiece: depending on current value], and dress interval [surface roughness until the surface roughness Ra of the workpiece reaches a certain value] Of the ground material], the results shown in Table 1 were obtained. In addition, the numerical values shown in Table 1 are the values of Comparative Examples in which no ceramic abrasive grains are used in each Example.
It is represented by a relative value of 00. In Table 1, “Other abrasive grains” are indicated by reference symbol X.
【００２９】[0029]
【表１】 表１において、砥粒比の欄の砥粒種類と数値との間に付
された「＊」印は、当該砥粒として加熱・急冷処理品
（砥粒ＨＡについて）が使用されたことを示す。[Table 1] In Table 1, an asterisk (*) provided between the abrasive type and the numerical value in the column of the abrasive ratio indicates that a heated and quenched product (for the abrasive HA) was used as the abrasive. .
【００３０】以上の結果から分かるように、本発明実施
例の砥石によれば、砥石の摩耗量、研削比及びドレス間
隔の全てを総合して、顕著な改善がみられる。As can be seen from the above results, according to the grindstone of the embodiment of the present invention, a remarkable improvement is seen in all of the wear amount of the grindstone, the grinding ratio, and the dress interval.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によれば、
切れ味が良く且つ研削比が高く、ドレス間隔を長くして
も良好な研削を継続することができる、研削性能の良好
なビトリファイド砥石が提供される。As described above, according to the present invention,
A vitrified grindstone with good grinding performance, which has good sharpness, a high grinding ratio, and can continue good grinding even when the dress interval is lengthened.
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１２年４月６日（２０００．４．６）[Submission date] April 6, 2000 (200.4.6)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 星野 和友 埼玉県上尾市原市1333−２ 三井金属鉱業 株式会社総合研究所内 (72)発明者 国崎 敏哉 埼玉県上尾市原市1333−２ 三井金属鉱業 株式会社総合研究所内 (72)発明者 今井 道雄 埼玉県入間市狭山ケ原11−10 三井研削砥 石株式会社内 Ｆターム(参考） 3C063 AA02 AB03 BB01 BB03 BC05 BD01 FF23 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazutomo Hoshino 1333-2, Hara-shi, Ageo-shi, Saitama Prefecture Mitsui Mining & Smelting Co., Ltd. (72) Inventor Michio Imai 11-10 Sayamagahara, Iruma-shi, Saitama F-term (reference) 3C063 AA02 AB03 BB01 BB03 BC05 BD01 FF23
Claims (4)
リファイド系結合材を用いて結合してなり、前記その他
の砥粒は白色アルミナ砥粒、淡紅色アルミナ砥粒及び解
砕型アルミナ砥粒のうちの少なくとも１種であり、前記
セラミック砥粒と前記その他の砥粒との合計に対する前
記セラミック砥粒の割合が３〜２０体積％であることを
特徴とするビトリファイド砥石。1. A ceramic abrasive grain and other abrasive grains are bonded by using a vitrified binder, and the other abrasive grains are formed of white alumina abrasive, light red alumina abrasive and crushed alumina abrasive. A vitrified grinding wheel, wherein at least one of the abrasive grains has a ratio of the ceramic abrasive grains to the total of the ceramic abrasive grains and the other abrasive grains of 3 to 20% by volume.
ることを特徴とする、請求項１に記載のビトリファイド
砥石。2. The vitrified grinding wheel according to claim 1, wherein the crushed alumina abrasive grains are made of a single crystal.
理を経て作製されたものであることを特徴とする、請求
項２に記載のビトリファイド砥石。3. The vitrified grinding wheel according to claim 2, wherein the crushed alumina abrasive grains are produced through a mechanical crushing process.
より内部応力を高める処理を経て作製されたものである
ことを特徴とする、請求項１〜３のいずれかに記載のビ
トリファイド砥石。4. The vitrified grinding wheel according to claim 1, wherein said crushed alumina abrasive grains are produced through a process of increasing internal stress by heating and quenching.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22154299A JP3200051B2 (en) | 1999-08-04 | 1999-08-04 | Vitrified whetstone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22154299A JP3200051B2 (en) | 1999-08-04 | 1999-08-04 | Vitrified whetstone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001038634A true JP2001038634A (en) | 2001-02-13 |
| JP3200051B2 JP3200051B2 (en) | 2001-08-20 |
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ID=16768364
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22154299A Expired - Lifetime JP3200051B2 (en) | 1999-08-04 | 1999-08-04 | Vitrified whetstone |
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| Country | Link |
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| JP (1) | JP3200051B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012192488A (en) * | 2011-03-16 | 2012-10-11 | Mitsubishi Materials Corp | Resin bond grinding wheel |
-
1999
- 1999-08-04 JP JP22154299A patent/JP3200051B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012192488A (en) * | 2011-03-16 | 2012-10-11 | Mitsubishi Materials Corp | Resin bond grinding wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3200051B2 (en) | 2001-08-20 |
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