JP2003136410A - Super-abrasive grains vitrified bond grinding wheel - Google Patents
Super-abrasive grains vitrified bond grinding wheelInfo
- Publication number
- JP2003136410A JP2003136410A JP2001334230A JP2001334230A JP2003136410A JP 2003136410 A JP2003136410 A JP 2003136410A JP 2001334230 A JP2001334230 A JP 2001334230A JP 2001334230 A JP2001334230 A JP 2001334230A JP 2003136410 A JP2003136410 A JP 2003136410A
- Authority
- JP
- Japan
- Prior art keywords
- superabrasive
- grinding
- bond
- grindstone
- vitrified bond
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、超硬合金、サーメ
ット、ＭＭＣ、セラミックス、気相合成法により形成さ
れた各種の硬質膜などの難削材の研削加工は無論、特に
多結晶ダイヤモンド焼結体（ＰＣＤ）や多結晶立方晶窒
化硼素焼結体（ＰＣＢＮ）のような超硬質難削材を高能
率、高精度に研削加工することができる超砥粒ビトリフ
ァイドボンド砥石に関する。TECHNICAL FIELD The present invention is not limited to grinding of difficult-to-cut materials such as cemented carbide, cermet, MMC, ceramics, various hard films formed by vapor phase synthesis, and especially polycrystalline diamond sintering. The present invention relates to a superabrasive grain vitrified bond grindstone capable of grinding an ultra-hard difficult-to-cut material such as a body (PCD) or a polycrystalline cubic boron nitride sintered body (PCBN) with high efficiency and accuracy.
【０００２】[0002]
【従来の技術】上記の素材は硬度が高く耐摩耗性に優
れ、破壊靭性値及びヤング率が高いなどの優れた物理的
特性を有するため切削工具や耐摩工具として広く使用さ
れている。その中でも、ＰＣＤとＰＣＢＮは微細で粒径
の揃ったダイヤモンド又はＣＢＮ粒子を超硬合金製台金
に載せ、超高圧高温下で焼結したもので、極めて強靱な
多結晶焼結体であるため、切削工具や耐摩工具として必
要な特性があらゆる素材に比較して数段優れたものであ
る。しかし、反面、主成分がダイヤモンドやＣＢＮ粒子
からなるため、所望の切削工具や耐摩工具などに研削加
工するには、超砥粒砥石を用いる以外に方法はなく、砥
粒と被削材主成分が同一素材であるから、砥石は激しく
目つぶれ、目詰まりが生じ、切味を維持するには頻度の
高いドレッシングが必要となる等の問題が避けられず、
高能率、高精度に研削加工できる砥石が求められてい
る。2. Description of the Related Art The above materials are widely used as cutting tools and wear resistant tools because they have excellent physical properties such as high hardness and excellent wear resistance and high fracture toughness and Young's modulus. Among them, PCD and PCBN are obtained by placing diamond or CBN particles, which are fine and uniform in particle size, on a cemented carbide base metal and sintered at ultrahigh pressure and high temperature, and are extremely tough polycrystalline sintered bodies. The properties required for cutting tools and wear resistant tools are far superior to all materials. However, on the other hand, since the main component consists of diamond and CBN particles, there is no method other than using a superabrasive grindstone for grinding into a desired cutting tool or wear resistant tool. Since it is the same material, the grindstone is severely crushed, clogging occurs, and problems such as frequent dressing are necessary to maintain sharpness are unavoidable,
There is a demand for a grindstone capable of grinding with high efficiency and high accuracy.
【０００３】かかる素材の研削加工には、超砥粒レジン
ボンド砥石やメタルボンド砥石が用いられている。レジ
ンボンド砥石はボンドが軟質で砥粒保持力が弱いので、
短寿命である上、弾性があるため被削材加工面にダレが
生じ易く、シャープな切刃を必要とする切削工具の加工
には向かない欠点がある。メタルボンド砥石は砥粒保持
力は強いがボンドの後退性が悪く、目つぶれや目詰まり
が生じ易い。その上、ドレッシング性やツルーイング性
も悪く加工能率が良くない。Super-abrasive resin-bonded grindstones and metal-bonded grindstones are used for grinding such materials. Since the bond of the resin bond grindstone is soft and the grain retention is weak,
In addition to having a short service life, it has elasticity, which easily causes sagging on the work surface of the work material, which is not suitable for machining a cutting tool that requires a sharp cutting edge. The metal bond grindstone has a strong abrasive grain retention force, but the bond receding property is poor, so that crushing or clogging is likely to occur. In addition, the dressing property and the truing property are poor and the processing efficiency is not good.
【０００４】ビトリファイドボンド砥石は主成分がガラ
ス質又はセラミック質の結合材よりなりメタルボンドに
近い弾性係数であるので、被削材の加工面にダレを生じ
ない。その上、ボンドの後退性が良いのでメタルボンド
に比べドレッシング性、ツルーイング性にも優れてい
る。このため、超砥粒ビトリファイドボンド砥石はＰＣ
ＤやＰＣＢＮを始めとする前述の素材の研削加工に用い
られることが多い。The vitrified bond grindstone is composed mainly of a glass or ceramic bonding material and has an elastic modulus close to that of a metal bond, so that the work surface of the work material is not sagged. In addition, because the bond recedes well, it has superior dressing and truing properties compared to metal bonds. For this reason, the superabrasive vitrified bond grindstone is PC
It is often used for grinding the above-mentioned materials such as D and PCBN.
【０００５】[0005]
【発明が解決しようとする課題】超砥粒ビトリファイド
ボンド砥石には、無気孔のものと有気孔のものがある
が、高精度の加工を求められるＰＣＤ又はＰＣＢＮ切削
工具などの研削加工には、形状精度が要求されるので、
ボンド強度のある無気孔のビトリファイドボンド砥石が
一般的に用いられる。There are two types of superabrasive vitrified bond grindstones, one having no pores and the other having pores. For grinding such as a PCD or PCBN cutting tool which requires high precision machining, Since shape accuracy is required,
A non-porous vitrified bond grindstone having a bond strength is generally used.
【０００６】しかしながら、無気孔の超砥粒ビトリファ
イドボンド砥石を用いた場合、どうしても鏡面状態の滑
らかな研削面が得られない。特に重研削になる程、研削
面により多くのスジが生じる傾向にあった。この原因
は、本発明者らが先に提案した特願２００１−２３２２
３号に記載の如く、ボンド中より脱落した超砥粒が遊離
砥粒となって、砥面と被削材との間に挟まれ、巻き込ま
れながら加工が進行するため、ＰＣＤ又はＰＣＢＮの研
削面に深い条痕のスジとなって残り、高精度な仕上げ面
が得られないことにあることを見出した。However, when a non-porous superabrasive vitrified bond grindstone is used, a smooth ground surface in a mirror state cannot be obtained. In particular, as the grinding becomes heavy, many streaks tend to occur on the ground surface. The cause of this is Japanese Patent Application No. 2001-2322 previously proposed by the present inventors.
As described in No. 3, the superabrasive grains that have fallen out of the bond become free abrasive grains, are sandwiched between the abrasive surface and the work material, and the processing progresses while being caught, so grinding of PCD or PCBN It was discovered that deep streak streaks remained on the surface, and a highly accurate finished surface could not be obtained.
【０００７】その解決策として、特願２００１−２３２
２３号に記載の如く、超砥粒をビトリファイドボンドで
結合された超砥粒層に気孔を有するビトリファイドボン
ド砥石において、ボンドブリッジ間に形成される気孔の
うち、その気孔径が超砥粒の平均粒径の１．５〜５倍の
範囲にあるものが５０％以上存在し、且つ、超砥粒層中
における総気孔量を２５〜４５容量％とする超砥粒ビト
リファイドボンド砥石とすることである。これにより、
研削作用中に超砥粒層から脱落した遊離砥粒が、脱落と
同時に砥面の気孔に入り込み、遊離砥粒に起因する研削
条痕が生じることなく、ボンドに固着された超砥粒のみ
が研削作用に関与し、前述の難削材を高精度な加工面に
研削仕上げすることができる砥石を得ることができた。As a solution, Japanese Patent Application No. 2001-232
As described in No. 23, in a vitrified bond grindstone having pores in a superabrasive grain layer in which superabrasive grains are bonded by vitrified bonds, among the pores formed between bond bridges, the pore diameter is the average of the superabrasive grains. By using a superabrasive grain vitrified bond grindstone in which 50% or more of the grains are in the range of 1.5 to 5 times the grain size, and the total amount of pores in the superabrasive grain layer is 25 to 45% by volume. is there. This allows
Free abrasive grains that have fallen out of the superabrasive grain layer during the grinding operation enter the pores of the polishing surface at the same time as the falloff, and without the occurrence of grinding scratches due to the free abrasive grains, only the superabrasive grains that are fixed to the bond It was possible to obtain a grindstone that participates in the grinding action and is capable of grinding and finishing the aforementioned difficult-to-cut material to a highly accurate machined surface.
【０００８】更に、ＰＣＤやＰＣＢＮを高精度、高能率
に研削するのに有効な超砥粒径を５〜１００μｍとし
た。超砥粒径は研削する工具の要求精度に応じて適宜選
択するが、平均粒径が５μｍ未満の微粒では研削速度が
遅く、１００μｍ超の大粒では被削材のエッジ部分にチ
ッピングを生じやすく、研削面の面粗度も悪くなりやす
いので、精度が求められる切削工具などを加工するには
５〜１００μｍとするのが好ましいものとしていた。Further, the superabrasive grain size effective for grinding PCD and PCBN with high precision and high efficiency is set to 5 to 100 μm. The super-abrasive grain size is appropriately selected according to the required accuracy of the tool to be ground, but the fine grain having an average grain size of less than 5 μm has a low grinding speed, and the large grain having an average grain size of more than 100 μm easily causes chipping at the edge portion of the work material, Since the surface roughness of the ground surface is likely to deteriorate, it is preferable that the thickness be 5 to 100 μm in order to process a cutting tool or the like that requires high accuracy.
【０００９】又、超砥粒層中における超砥粒の含有量
は、ＰＣＤやＰＣＢＮの研削においては、２０〜６０容
量％の場合、最も良好な研削能率が得られるものとして
いた。２０容量％未満では研削に作用する超砥粒数が少
ないため砥石の摩耗が早く、６０容量％超にすると研削
抵抗が大きく好ましくないためである。Further, when the content of the superabrasive grains in the superabrasive grain layer is 20 to 60% by volume in the grinding of PCD or PCBN, the best grinding efficiency is obtained. This is because if it is less than 20% by volume, the number of superabrasive grains that act on grinding is small, and the grindstone wears quickly, and if it exceeds 60% by volume, the grinding resistance is large and it is not preferable.
【００１０】これらから、最も難削材であるＰＣＤの研
削加工についても、高精度に加工できる極めて優れた砥
石とすることができるものであった。しかしながら、高
精度研削においては目的を達したものの、超難削材であ
るＰＣＤやＰＣＢＮの研削加工においては、加工に時間
がかかり、能率面の点では必ずしも満足できるものとは
言えなかった。From these, it was possible to obtain an extremely excellent grindstone which can be machined with high precision in the grinding of PCD, which is the most difficult-to-cut material. However, although the purpose has been achieved in high-precision grinding, the grinding of PCD and PCBN, which are super-difficult-to-cut materials, takes a long time and is not always satisfactory in terms of efficiency.
【００１１】[0011]
【課題を解決するための手段】そこで本発明は、更なる
高能率加工を可能にするため、上記の砥石の研削抵抗を
大幅に低減させることを目的に、ボンド中に固体潤滑剤
を含有させて、前記の問題点を解決するものである。Therefore, in the present invention, a solid lubricant is contained in the bond for the purpose of significantly reducing the grinding resistance of the above-mentioned grindstone in order to enable further high-efficiency processing. The above problems are solved.
【００１２】本発明の超砥粒ビトリファイドボンド砥石
の第１の特徴は、超砥粒をビトリファイドボンドで結合
させた超砥粒層に気孔を有するビトリファイドボンド砥
石において、ボンドブリッジ間に形成される気孔のう
ち、その気孔径が超砥粒の平均粒径の１．５〜５倍の範
囲にあるものが５０％以上存在し、且つ、超砥粒層中に
おける総気孔量が２５〜４５容量％であり、ボンド中に
ボンド容量の０．２〜１５容量％を占める固体潤滑剤を
含有させたことである。The first feature of the superabrasive vitrified bond grindstone of the present invention is that in a vitrified bond grindstone having pores in a superabrasive grain layer in which superabrasive grains are bonded by vitrified bond, pores formed between bond bridges. Among them, 50% or more of them have a pore diameter in the range of 1.5 to 5 times the average particle diameter of superabrasive grains, and the total pore amount in the superabrasive grain layer is 25 to 45% by volume. That is, the solid lubricant occupying 0.2 to 15% by volume of the bond capacity was contained in the bond.
【００１３】第２の特徴は、前記超砥粒の平均粒径を５
〜１００μｍとし、超砥粒層中における超砥粒含有量を
２０〜６０容量％としたことである。The second feature is that the average grain size of the superabrasive grains is 5
˜100 μm, and the superabrasive grain content in the superabrasive grain layer is 20 to 60% by volume.
【００１４】第３の特徴は、前記固体潤滑剤をｈ−ＢＮ
としたことである。A third feature is that the solid lubricant is h-BN.
That is.
【００１５】第４の特徴は、前記超砥粒ビトリファイド
ボンド砥石を多結晶ダイヤモンド焼結体又は多結晶立方
晶窒化硼素焼結体の研削用としたことである。A fourth feature is that the above-mentioned superabrasive grain vitrified bond grindstone is used for grinding a polycrystalline diamond sintered body or a polycrystalline cubic boron nitride sintered body.
【００１６】一般に、無気孔のビトリファイドボンド砥
石は、研削抵抗が高く円滑な研削作用の持続が困難とな
るため、解決策として、結合材であるボンド中に固体潤
滑剤を充填することで、被削材との間の摩擦抵抗を減少
させると共に、固体潤滑剤の摩耗もしくは破壊脱落によ
り、チップポケットが形成されるので、目詰まり防止と
冷却効果を高めることが知られている。しかし、気孔容
量の小さい有気孔ビトリファイドボンド砥石には、固体
潤滑剤が添加されることがあっても、砥粒の周囲に気孔
が存在するボンドブリッジタイプの有気孔ビトリファイ
ドボンド砥石には、目詰まり防止や冷却効果が充分ある
ため、ボンド強度を低下させる固体潤滑剤は用いられな
い。有気孔ビトリファイドボンド砥石で固体潤滑剤を充
填した発明には、特開２０００−９７３２号及び特開２
０００−６１８４７号があるが、これらは５％以下の微
少気孔タイプのビトリファイドボンド砥石に限られたも
のであり、しかも、ホーニングないしは超仕上げ加工を
目的とする限定された研削加工用として開発されたもの
であり、本願とは異なる発明である。In general, a non-porous vitrified bond grindstone has a high grinding resistance and it is difficult to maintain a smooth grinding action. Therefore, as a solution, by filling a solid lubricant into the bond as a binder, It is known that the friction resistance with the cutting material is reduced, and chip pockets are formed due to wear or breakage of the solid lubricant, so that clogging prevention and cooling effect are enhanced. However, even though a solid lubricant may be added to a pore-pore vitrified bond grindstone with a small pore volume, a bond bridge-type pore-pore vitrified bond grindstone in which pores exist around the abrasive grains is clogged. Solid lubricants that reduce the bond strength are not used because they have sufficient prevention and cooling effects. The invention in which a solid lubricant is filled with a porous vitrified bond grindstone is disclosed in JP-A-2000-9732 and JP-A-2.
000-61847, but these are limited to micropore type vitrified bond grindstones of 5% or less, and were developed for limited grinding for honing or superfinishing. The present invention is different from the present application.
【００１７】本発明は、特願２００１−２３２２３号に
記載の砥石に固体潤滑剤を添加し、添加によりボンド強
度の低下を来たして砥石摩耗を大きくさせることなく、
且つ、研削抵抗を低減させるに有効な範囲を実地テスト
にて見出した。その結果、後述の実施例による図２に示
す研削抵抗と砥石摩耗量のグラフから分かるように、ボ
ンド中に占める固体潤滑剤の量を１５容量％以下とすれ
ば、砥石寿命を僅かに低下させるに止まり、且つ、研削
抵抗を大きく低減させる効果があることが判明した。更
に、０．２容量％以上から急激に研削抵抗が低減し、以
降なだらかに研削抵抗が低減する。一方、１５容量％超
になると砥石摩耗量が急激に大きくなる。特に、０．２
〜５．０容量％とすれば、本発明者らが先に提案した固
体潤滑剤を含有しない砥石に比べ、研削抵抗が２０％以
上低下し、且つ、砥石摩耗量は殆ど低下しない、より好
ましい範囲であることが判明した。According to the present invention, a solid lubricant is added to the grindstone described in Japanese Patent Application No. 2001-23223, and the addition of the solid lubricant does not decrease the bond strength and increase the wear of the grindstone.
Moreover, an effective range for reducing the grinding resistance was found by a field test. As a result, as can be seen from the graph of the grinding resistance and grindstone wear amount shown in FIG. 2 according to the examples described below, if the amount of the solid lubricant in the bond is 15% by volume or less, the grindstone life is slightly reduced. It was found that there is an effect that the grinding resistance is greatly reduced and the grinding resistance is greatly reduced. Further, the grinding resistance sharply decreases from 0.2% by volume or more, and thereafter, the grinding resistance gradually decreases. On the other hand, if it exceeds 15% by volume, the amount of abrasion of the grindstone rapidly increases. Especially 0.2
When the content is up to 5.0% by volume, the grinding resistance is reduced by 20% or more, and the abrasion amount of the grindstone is hardly reduced, as compared with the grindstone not containing the solid lubricant previously proposed by the present inventors, which is more preferable. It turned out to be a range.
【００１８】本発明の砥石に用いる固体潤滑剤は、ｈ−
ＢＮ、ＭｏＳ２、黒鉛、グラファイトなどいずれを用い
ても良いが、超砥粒ビトリファイドボンド砥石は、その
製造工程で数百℃〜略１０００℃で焼成を行うため、熱
的安定性があり、かかる高熱においても酸化ないし変質
することがないｈ−ＢＮを用いるのが特に好ましい。The solid lubricant used in the grindstone of the present invention is h-
Although any of BN, MoS 2 , graphite, graphite, etc. may be used, the superabrasive vitrified bond grindstone has thermal stability because it is fired at several hundreds to about 1000 ° C in the manufacturing process. It is particularly preferable to use h-BN that does not oxidize or deteriorate even at high heat.
【００１９】[0019]
【発明の実施の形態】本発明の実施の形態については、
実施例の項で説明する。BEST MODE FOR CARRYING OUT THE INVENTION Regarding the embodiments of the present invention,
This will be described in the example section.
【００２０】[0020]
【実施例】粒度が＃２０００（粒径５〜１２μｍ）のダ
イヤモンド砥粒と、ボンド組成がＳｉＯ２：６２重量
％、Ａｌ２Ｏ３：１７重量％、Ｋ２Ｏ：９重量％、Ｃａ
Ｏ：４重量％、Ｂ２Ｏ３：２重量％、Ｎａ２Ｏ：２重量
％、Ｆｅ２Ｏ３：０．５重量％、ＭｇＯ：０．３重量％
の割合よりなるビトリファイド微粉に、ｈ−ＢＮを添加
した後、エタノールを混合して超砥粒の周りにビトリフ
ァイド微粉を付着させ、乾燥炉に入れてアルコール分を
蒸発させた。これを金型に充填して加圧成形した後、焼
成してリング状の超砥粒層を製作した。これをアルミニ
ウム製台金に接着して、外径φ１５０ｍｍ、幅１５ｍ
ｍ、超砥粒層厚み５ｍｍのカップ型砥石を得た。EXAMPLES Diamond abrasive grains having a grain size of # 2000 (particle size 5 to 12 μm) and a bond composition of SiO 2 : 62 wt%, Al 2 O 3 : 17 wt%, K 2 O: 9 wt%, Ca
O: 4% by weight, B 2 O 3 : 2% by weight, Na 2 O: 2% by weight, Fe 2 O 3 : 0.5% by weight, MgO: 0.3% by weight
After adding h-BN to the vitrified fine powder having the ratio of 1), ethanol was mixed to adhere the vitrified fine powder around the superabrasive grains, and the mixture was placed in a drying furnace to evaporate the alcohol content. This was filled in a mold, pressure-molded, and then fired to form a ring-shaped superabrasive grain layer. This is bonded to an aluminum base metal, outer diameter φ150 mm, width 15 m
A cup-shaped grindstone having a thickness of m and a superabrasive grain layer thickness of 5 mm was obtained.
【００２１】ｈ−ＢＮの添加容量は、ボンド容量に対
し、０、０．２、０．７５、１．０、１．５、２．０、
４．０、６．０、１０．０容量％とした９種類のものを
製作した。ボンド中へのｈ−ＢＮの添加容量％は以上の
ように異なるが、いずれのものも、超砥粒含有率は４０
容量％、気孔量は３０容量％、ボンドとｈ−ＢＮの合計
は３０容量％となるようにした。The added capacity of h-BN is 0, 0.2, 0.75, 1.0, 1.5, 2.0, relative to the bond capacity.
Nine kinds of materials with 4.0, 6.0 and 10.0% by volume were manufactured. The addition volume% of h-BN in the bond is different as described above, but in all cases, the superabrasive content is 40%.
The volume% and the porosity were set to 30% by volume, and the total of the bond and h-BN was set to 30% by volume.
【００２２】これらの砥石の砥面を顕微鏡で観察の結
果、いずれの砥石においても、砥粒平均粒径１０μｍに
対しその１．５〜５倍のチップポケットが６０％以上あ
ることが確認できた。図１はｈ−ＢＮを６容量％添加し
た砥石の砥面の反射電子像（ＳＥＭ写真）である。白い
部分がボンド、砥粒、ｈ−ＢＮからなるボンドブリッジ
部分であり、黒い部分が気孔部である。As a result of observing the grinding surfaces of these grindstones with a microscope, it was confirmed that, in any of the grindstones, 60% or more of the chip pockets are 1.5 to 5 times the average grain size of 10 μm. . FIG. 1 is a backscattered electron image (SEM photograph) of the grinding surface of a grindstone containing 6% by volume of h-BN. The white portion is a bond bridge portion composed of a bond, abrasive grains, and h-BN, and the black portion is a pore portion.
【００２３】以上の９種類の砥石を用い、表１に示す研
削条件にて、ＰＣＤの研削加工試験を行った。A PCD grinding test was performed under the grinding conditions shown in Table 1 using the above 9 kinds of grindstones.
【００２４】[0024]
【表１】 [Table 1]
【００２５】研削試験の結果を図２に示す。図２は９種
類の砥石すなわちボンド中におけるｈ−ＢＮの添加量の
違いに対する砥石摩耗量と研削抵抗の関係を示す。砥石
摩耗量は、超砥粒層の厚みの減少量とした。この結果よ
り、ｈ−ＢＮを０．２容量％添加することで急激に研削
抵抗が低減する。又、ｈ−ＢＮが１５容量％超になると
研削抵抗はより低下するものの、急激に砥石摩耗量が大
きくなってしまい好ましくないことが分かる。特に０．
２〜５．０容量％の範囲で、砥石摩耗量の影響が小さ
く、研削抵抗を２０〜２５％低下させることができ、好
ましいことが分かる。The results of the grinding test are shown in FIG. FIG. 2 shows the relationship between the amount of grindstone wear and the grinding resistance with respect to the difference in the amount of h-BN added in nine types of grindstones, that is, in the bond. The amount of grindstone wear was defined as the amount of reduction in the thickness of the superabrasive grain layer. From this result, the grinding resistance is rapidly reduced by adding 0.2% by volume of h-BN. Further, when h-BN exceeds 15% by volume, the grinding resistance further decreases, but it is not preferable because the amount of abrasion of the grindstone rapidly increases. Especially 0.
It can be seen that in the range of 2 to 5.0% by volume, the influence of the abrasion amount of the grindstone is small and the grinding resistance can be reduced by 20 to 25%, which is preferable.
【００２６】[0026]
【発明の効果】以上説明したように、本発明の砥石は、
ボンドから脱落し遊離した砥粒が脱落と同時に前記気孔
中に入り込み、遊離砥粒に起因する砥面の研削条痕の発
生を防止するとともに、砥石摩耗を大きくすることな
く、研削抵抗を大幅に低減させ、ＰＣＤやＰＣＢＮ等の
超難削材を高精度、高能率加工できる砥石とすることが
できる。As described above, the grindstone of the present invention is
Abrasive particles that fall off from the bond and fall into the pores at the same time as falling off, prevent the generation of grinding streak on the abrasive surface due to loose abrasive grains, and increase the grinding resistance without increasing the grinding stone wear. It is possible to reduce the amount of the hard-to-cut material such as PCD and PCBN with high precision and high efficiency.
【図１】本発明の実施例砥石の砥面の反射電子像ＳＥＭ
写真（×５００）。FIG. 1 is a backscattered electron image SEM of a grinding surface of an example grindstone of the present invention.
Photo (x500).
【図２】固体潤滑剤ｈ−ＢＮの添加量の違いによる砥石
摩耗量と研削抵抗のグラフ。FIG. 2 is a graph of grinding wheel wear amount and grinding resistance due to a difference in the addition amount of solid lubricant h-BN.
Claims (4)
せた超砥粒層に気孔を有するビトリファイドボンド砥石
において、 ボンドブリッジ間に形成される気孔のうち、その気孔径
が超砥粒の平均粒径の１．５〜５倍の範囲にあるものが
５０％以上存在し、且つ、超砥粒層中における総気孔量
が２５〜４５容量％であり、ボンド中にボンド容量の
０．２〜１５容量％を占める固体潤滑剤を含有させたこ
とを特徴とする超砥粒ビトリファイドボンド砥石。1. A vitrified bond grindstone having pores in a superabrasive grain layer in which superabrasive grains are bonded by vitrified bonds, wherein among pores formed between bond bridges, the pore diameter is the average grain diameter of the superabrasive grains. 50% or more exists in the range of 1.5 to 5 times, and the total amount of pores in the superabrasive grain layer is 25 to 45% by volume. A superabrasive vitrified bond grindstone characterized by containing a solid lubricant occupying volume%.
とし、超砥粒層中における超砥粒含有量を２０〜６０容
量％とすることを特徴とする請求項１記載の超砥粒ビト
リファイドボンド砥石。2. The average grain size of the superabrasive grains is 5 to 100 μm.
The superabrasive grain vitrified bond grindstone according to claim 1, wherein the superabrasive grain content in the superabrasive grain layer is 20 to 60% by volume.
特徴とする請求項１又は２記載の超砥粒ビトリファイド
ボンド砥石。3. The superabrasive vitrified bond grindstone according to claim 1, wherein the solid lubricant is h-BN.
方晶窒化硼素焼結体の研削用とすることを特徴とする請
求項１〜３のいずれかに記載の超砥粒ビトリファイドボ
ンド砥石。4. The superabrasive vitrified bond grindstone according to any one of claims 1 to 3, which is used for grinding a polycrystalline diamond sintered body or a polycrystalline cubic boron nitride sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334230A JP2003136410A (en) | 2001-10-31 | 2001-10-31 | Super-abrasive grains vitrified bond grinding wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334230A JP2003136410A (en) | 2001-10-31 | 2001-10-31 | Super-abrasive grains vitrified bond grinding wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003136410A true JP2003136410A (en) | 2003-05-14 |
Family
ID=19149389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001334230A Withdrawn JP2003136410A (en) | 2001-10-31 | 2001-10-31 | Super-abrasive grains vitrified bond grinding wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003136410A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106001A1 (en) * | 2003-05-30 | 2004-12-09 | Bosch Corporation | Vitrified grinding wheel and method of manufacturing the same |
| EP1598147A2 (en) * | 2004-05-20 | 2005-11-23 | Disco Corporation | Vitrified bond grindstone and manufacturing process thereof |
| JP2014083621A (en) * | 2012-10-22 | 2014-05-12 | Noritake Co Ltd | Vitrified grindstone of high porosity, method of producing the same and method of evaluating homogeneity of vitrified grindstone |
| US8771390B2 (en) | 2008-06-23 | 2014-07-08 | Saint-Gobain Abrasives, Inc. | High porosity vitrified superabrasive products and method of preparation |
| US8784519B2 (en) | 2009-10-27 | 2014-07-22 | Saint-Gobain Abrasives, Inc. | Vitrious bonded abbrasive |
| US8911283B2 (en) | 2010-08-06 | 2014-12-16 | Saint-Gobain Abrasives, Inc. | Abrasive tool and a method for finishing complex shapes in workpieces |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| WO2004106001A1 (en) * | 2003-05-30 | 2004-12-09 | Bosch Corporation | Vitrified grinding wheel and method of manufacturing the same |
| EP1598147A2 (en) * | 2004-05-20 | 2005-11-23 | Disco Corporation | Vitrified bond grindstone and manufacturing process thereof |
| EP1598147A3 (en) * | 2004-05-20 | 2006-07-05 | Disco Corporation | Vitrified bond grindstone and manufacturing process thereof |
| US8771390B2 (en) | 2008-06-23 | 2014-07-08 | Saint-Gobain Abrasives, Inc. | High porosity vitrified superabrasive products and method of preparation |
| US8784519B2 (en) | 2009-10-27 | 2014-07-22 | Saint-Gobain Abrasives, Inc. | Vitrious bonded abbrasive |
| US9138866B2 (en) | 2009-10-27 | 2015-09-22 | Saint-Gobain Abrasives, Inc. | Resin bonded abrasive |
| US8911283B2 (en) | 2010-08-06 | 2014-12-16 | Saint-Gobain Abrasives, Inc. | Abrasive tool and a method for finishing complex shapes in workpieces |
| US9266220B2 (en) | 2011-12-30 | 2016-02-23 | Saint-Gobain Abrasives, Inc. | Abrasive articles and method of forming same |
| JP2014083621A (en) * | 2012-10-22 | 2014-05-12 | Noritake Co Ltd | Vitrified grindstone of high porosity, method of producing the same and method of evaluating homogeneity of vitrified grindstone |
| JP2019136806A (en) * | 2018-02-08 | 2019-08-22 | 株式会社ディスコ | Holding surface grinding method |
| JP7049848B2 (en) | 2018-02-08 | 2022-04-07 | 株式会社ディスコ | How to grind the holding surface |
| TWI782178B (en) * | 2018-02-08 | 2022-11-01 | 日商迪思科股份有限公司 | Grinding method of holding surface |
| KR102662484B1 (en) * | 2018-02-08 | 2024-04-30 | 가부시기가이샤 디스코 | Holding surface grinding method |
| CN110238765A (en) * | 2019-06-21 | 2019-09-17 | 郑州磨料磨具磨削研究所有限公司 | A kind of superfinishing grinding abrasive disk vitrified bond and its preparation method and application |
| CN110238765B (en) * | 2019-06-21 | 2021-05-18 | 郑州磨料磨具磨削研究所有限公司 | Ceramic bond for super-finishing grinding wheel and application thereof |
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