JPH10151571A - Super abrasive grain grinding wheel - Google Patents
Super abrasive grain grinding wheelInfo
- Publication number
- JPH10151571A JPH10151571A JP31204096A JP31204096A JPH10151571A JP H10151571 A JPH10151571 A JP H10151571A JP 31204096 A JP31204096 A JP 31204096A JP 31204096 A JP31204096 A JP 31204096A JP H10151571 A JPH10151571 A JP H10151571A
- Authority
- JP
- Japan
- Prior art keywords
- abrasive
- layer
- abrasive grain
- cbn
- diamond
- 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
Landscapes
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は超砥粒砥石、より詳
しくは、難削材や、そり、焼け、変形が発生し易い被削
材の研磨や研削に使用される超砥粒砥石に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superabrasive grindstone, and more particularly, to a superabrasive grindstone used for polishing or grinding a difficult-to-cut material or a work material which is liable to warp, burn or deform.
【０００２】[0002]
【従来の技術】工具鋼、ダイス鋼、軸受鋼、鋳鉄などの
研削・研磨用として、従来より、ＣＢＮ（立方晶窒化ホ
ウ素）砥粒を樹脂やメタルやビトリファイドで固めた超
砥粒砥石が使用されており、このような超砥粒砥石に
は、切れ味に優れ、しかもその切れ味が長期にわたって
持続することが要求される。2. Description of the Related Art Conventionally, for grinding and polishing tool steel, die steel, bearing steel, cast iron, etc., a superabrasive grindstone made by hardening CBN (cubic boron nitride) abrasive grains with a resin, metal or vitrified steel has been used. Therefore, such a superabrasive grindstone is required to have excellent sharpness and to maintain the sharpness over a long period of time.
【０００３】ダイヤモンド砥粒は鉄との反応性があるた
め、鉄系材料の研削には、ＣＢＮ砥粒が使用されている
が、ＣＢＮ砥粒においても研削作業の進行に伴い切れ味
が低下する。その主な原因として、研削作業によって超
砥粒が磨耗し鋭利さが失われることがあげられ、この対
策として、砥粒中にＣＢＮ砥粒とダイヤモンド砥粒を混
在させることが考えられている。[0003] CBN abrasive grains are used for grinding iron-based materials because diamond abrasive grains have reactivity with iron. However, the sharpness of CBN abrasive grains also decreases with the progress of the grinding operation. The main cause is that the super-abrasive grains are worn out by the grinding operation and the sharpness is lost. As a countermeasure against this, it has been considered to mix CBN abrasive grains and diamond abrasive grains in the abrasive grains.
【０００４】このようなダイヤモンド砥粒とＣＢＮ砥粒
のそれぞれの性質に着目し、例えば特開平６−２６２５
２７号公報には、ボンドマトリックス中にダイヤモンド
砥粒とＣＢＮ砥粒の双方を分散固定した砥石が提案され
ている。Focusing on the respective properties of such diamond abrasive grains and CBN abrasive grains, see, for example, Japanese Patent Application Laid-Open No. 6-2625.
No. 27 proposes a grindstone in which both diamond abrasive grains and CBN abrasive grains are dispersed and fixed in a bond matrix.
【０００５】ＣＢＮ砥粒にダイヤモンド砥粒を含ませる
ことにより、上記したように、研削に伴って砥粒中のダ
イヤモンド砥粒が適宜崩壊して自生発刃を促し、長期に
わたって良好な切れ味を維持することができ、結果とし
て、ドレッシングやツルーイングの回数を減らすことが
可能となる。[0005] By incorporating diamond abrasive grains in the CBN abrasive grains, as described above, the diamond abrasive grains in the abrasive grains are appropriately collapsed with grinding to promote spontaneous cutting and maintain good sharpness over a long period of time. As a result, the number of times of dressing and truing can be reduced.
【０００６】しかしながら、上記公報に開示された砥石
は、ボンドマトリックスとして、レジノイドボンドある
いはビトリファイドボンドを単独で用い、このボンドマ
トリックス内に、ダイヤモンド砥粒及びＣＢＮ砥粒を所
定配合で混合したものを分散固定したものであり、この
ため、ＣＢＮ砥粒とダイヤモンド砥粒の脱落する頻度は
同等となり、ダイヤモンド砥粒による充分な自生発刃作
用を期待することができない。However, the grindstone disclosed in the above publication uses a resinoid bond or a vitrified bond alone as a bond matrix, and a mixture obtained by mixing diamond abrasive grains and CBN abrasive grains in a predetermined mixture in the bond matrix. Since the CBN abrasive grains and the diamond abrasive grains fall off at the same frequency, it is not possible to expect a sufficient spontaneous cutting action by the diamond abrasive grains.
【０００７】一方、実開昭５７−８６７５８号公報に
は、２種類の砥粒を異なるボンドマトリックスで固定し
た砥石が開示されている。すなわち、同公報には、ダイ
ヤモンドを含むホーニングストーン本体の中央部に、２
００メッシュのＧＣ砥粒をエポキシ樹脂に混合して充填
したホーニングストーンが開示されている。このホーニ
ングストーンによれば、加工作業中にホーニングストー
ンの磨耗に伴ってＧＣ砥粒部が遊離して、その微粒がホ
ーニングストーンの加工面と被加工物との間に介在し、
切屑を除去して目詰まりを防止するとともに、ドレッシ
ング作用を助長するので、良好な切れ味を長時間持続さ
せることができる。On the other hand, Japanese Utility Model Laid-Open No. 57-86758 discloses a grindstone in which two types of abrasive grains are fixed with different bond matrices. That is, the gazette states that the central part of the honing stone body containing diamond is
A honing stone in which 00 mesh GC abrasive grains are mixed with an epoxy resin and filled is disclosed. According to this honing stone, the GC abrasive grains are released with the abrasion of the honing stone during the processing operation, and the fine particles are interposed between the processing surface of the honing stone and the workpiece,
Since the chips are removed to prevent clogging and promote the dressing action, good sharpness can be maintained for a long time.
【０００８】しかしながら、実開昭５７−８６７５８号
公報に開示されたものは、ダイヤモンド砥粒よりもＧＣ
砥粒が先に遊離するため、遊離したＧＣ砥粒による残存
するダイヤモンド砥粒の自生発刃作用は全く期待するこ
とができず、また、直方体状のものであるため、円盤状
台金側面に超砥粒層を固着成形した超砥粒砥石にはその
まま適用することができない。さらには、ヌープ硬度が
ダイヤモンドの場合７０００〜８０００、ＣＢＮが４７
００であるのに対し、ＧＣの場合２７００であるため、
ダイヤモンド砥粒やＣＢＮ砥粒を破砕する能力は極めて
低い。However, the one disclosed in Japanese Utility Model Laid-Open No. 57-86758 discloses that the use of a GC
Since the abrasive grains are released first, the spontaneous cutting action of the remaining diamond abrasive grains by the released GC abrasive grains cannot be expected at all, and since the abrasive grains are rectangular parallelepiped, they are attached to the side of the disk-shaped base metal. It cannot be directly applied to a superabrasive grindstone in which a superabrasive layer is fixedly formed. Further, when the Knoop hardness is diamond, it is 7000-8000, and CBN is 47.
00, whereas in the case of GC it is 2700,
The ability to crush diamond abrasive grains and CBN abrasive grains is extremely low.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、ダイヤモン
ド砥粒とＣＢＮ砥粒の双方を有し、良好な切れ味を持続
することのできる複合構造を、円盤状台金側面に超砥粒
層を固着成形した超砥粒砥石に適用する技術を見出すこ
とを目的とする。SUMMARY OF THE INVENTION The present invention provides a composite structure having both diamond abrasive grains and CBN abrasive grains and capable of maintaining good sharpness. An object of the present invention is to find a technique to be applied to a super-abrasive grindstone which is fixedly formed.
【００１０】[0010]
【課題を解決するための手段】本発明は上記課題を解決
するために、円盤状台金片面に超砥粒層を固着成形した
超砥粒砥石において、前記砥粒層をダイヤモンド砥粒層
とＣＢＮ砥粒層とから構成し、かつ前記ダイヤモンド砥
粒層の砥粒保持力を前記ＣＢＮ砥粒層の砥粒保持力より
も弱くしたことを特徴とする。In order to solve the above-mentioned problems, the present invention provides a superabrasive grindstone having a superabrasive layer fixedly formed on one surface of a disk-shaped base metal, wherein the abrasive layer and the diamond abrasive layer are combined. And a CBN abrasive layer, wherein the diamond abrasive layer has an abrasive holding power lower than that of the CBN abrasive layer.
【００１１】ダイヤモンド砥粒層の砥粒保持力をＣＢＮ
砥粒層の砥粒保持力よりも弱くすることにより、図７に
示すように、使用に伴い先にダイヤモンド砥粒が脱落し
て遊離状態となり、この遊離したダイヤモンド砥粒がＣ
ＢＮ砥粒に衝突し、ＣＢＮ砥粒の一部を破壊して鋭利な
状態にする。[0011] The abrasive holding power of the diamond abrasive layer is CBN.
By making the abrasive grain layer weaker than the abrasive grain holding force, as shown in FIG. 7, the diamond abrasive grains first fall off and become loose with use, and the loose diamond abrasive grains
It collides with BN abrasive grains, destroys a part of the CBN abrasive grains and makes them sharp.
【００１２】ダイヤモンド砥粒層の形状としては、円盤
状台金の中心から外周方向に向けて放射状に形成した
り、またダイヤモンド砥粒層を円盤状台金の中心を中心
とした複数の同心円状に形成することができる。The shape of the diamond abrasive layer may be radially formed from the center of the disk-shaped base toward the outer periphery, or the diamond abrasive layer may be formed in a plurality of concentric circles centered on the center of the disk-shaped base. Can be formed.
【００１３】ここで、ダイヤモンド砥粒層を放射状に形
成する場合、等間隔で多い方が望ましい。少ないとダイ
ヤモンド砥粒の量が少なく、上記したＣＢＮ砥粒の自生
発刃が少なくなり、多すぎると研削を行うＣＢＮ砥粒層
が小さくなるとともに製造も困難になる。また、各ダイ
ヤモンド砥粒層の間隔を不均一にするとＣＢＮの破砕状
況が不均一になり好ましくない。Here, when the diamond abrasive layers are formed radially, it is desirable that the diamond abrasive layers be arranged at equal intervals. If the amount is too small, the amount of diamond abrasive grains is small, and the spontaneous cutting of the above-mentioned CBN abrasive grains is reduced. If the amount is too large, the CBN abrasive layer to be ground becomes small and the production becomes difficult. Further, if the intervals between the diamond abrasive layers are not uniform, the crushing state of CBN becomes uneven, which is not preferable.
【００１４】ダイヤモンド砥粒層の幅は、砥粒層の面積
やダイヤモンド砥粒の量と本数によっても異なるが、外
径３００ｍｍで６本形成する場合、１．５〜２０ｍｍが
望ましい。幅が１．５ｍｍ未満であるとダイヤモンド砥
粒の量が少なくなり、２０ｍｍを越えるとＣＢＮ砥粒層
の面積が少なくなる。所定の研削性能を維持しつつかつ
自生発刃作用を効果的に発揮させるためには、ダイヤモ
ンド砥粒層の面積は全砥粒層面積の１〜３０％が望まし
い。これはダイヤモンド砥粒層を同心円状に形成する場
合も同様である。The width of the diamond abrasive layer varies depending on the area of the abrasive layer, the amount and the number of diamond abrasive grains, and is preferably 1.5 to 20 mm in the case of forming six diamonds with an outer diameter of 300 mm. When the width is less than 1.5 mm, the amount of the diamond abrasive grains decreases, and when it exceeds 20 mm, the area of the CBN abrasive layer decreases. In order to maintain the predetermined grinding performance and effectively exhibit the spontaneous cutting action, the area of the diamond abrasive layer is desirably 1 to 30% of the total abrasive layer area. This is the same when the diamond abrasive layer is formed concentrically.
【００１５】ダイヤモンド砥粒層とＣＢＮ砥粒層の砥粒
保持力の差は、要求される切れ味や寿命によって定める
ことが必要で、たとえば、ＣＢＮ砥粒層の砥粒保持力を
１００とした場合、ダイヤモンド砥粒層の砥粒保持力が
６０〜９５の範囲であることが望ましい。ダイヤモンド
砥粒層の砥粒保持力が６０未満であると、切れ味には優
れるが、寿命が短くなり、一方、９５を越えると、長寿
命とはなるが切れ味が悪くなる。The difference between the abrasive holding power of the diamond abrasive layer and that of the CBN abrasive layer needs to be determined according to the required sharpness and life. For example, when the abrasive holding power of the CBN abrasive layer is 100 It is desirable that the abrasive holding force of the diamond abrasive layer be in the range of 60 to 95. If the abrasive holding power of the diamond abrasive layer is less than 60, the sharpness is excellent, but the life is short, while if it exceeds 95, the life is long but the sharpness is poor.
【００１６】また、発生する遊離したダイヤモンド砥粒
の量は、ボンドマトリックスの種類、集中度、使用砥粒
の粒径、軟質フィラの添加量のいずれか又はこれらの組
み合わせによって達成することができる。この中でも特
に、ダイヤモンドの集中度と軟質フィラーの添加量を異
ならせて砥粒保持力に差をつけるのが、調整範囲を大き
くできる点から望ましい。Further, the amount of the released diamond abrasive grains can be achieved by any one of the kind of the bond matrix, the degree of concentration, the particle diameter of the abrasive grains used, the amount of the soft filler added, or a combination thereof. Among these, it is particularly preferable to make the difference in the degree of holding of the abrasive grains by making the concentration of the diamond and the amount of the soft filler added different from the viewpoint of increasing the adjustment range.
【００１７】例えば、このような条件を満たすものとし
て、ボンドマトリックスの場合、ダイヤモンド砥粒層の
ボンドマトリックスをレジノイドボンドとし、ＣＢＮ砥
粒層のボンドマトリックスをメタルボンドとすることに
よって、ＣＢＮ砥粒層の砥粒保持力を１００とした場
合、ダイヤモンド砥粒層の砥粒保持力を６０にすること
ができる。For example, in order to satisfy such conditions, in the case of a bond matrix, the bond matrix of the diamond abrasive layer is a resinoid bond, and the bond matrix of the CBN abrasive layer is a metal bond. When the abrasive holding power of the diamond abrasive layer is set to 100, the abrasive holding power of the diamond abrasive layer can be set to 60.
【００１８】砥粒の集中度によって対処する場合、ダイ
ヤモンド砥粒を集中度２００とし、ＣＢＮ砥粒を集中度
７５とすることによって、遊離するダイヤモンド砥粒量
を多くすることができ、ＣＢＮ砥粒の破砕頻度を高くす
ることができる。一般に集中度を高くすると、単粒応力
は低下するため、保持力は上がると考えられる。この場
合、ボンドの低強度化、レジノイドボンドではコーティ
ングなしにするなどが必要である。In the case of coping with the degree of concentration of abrasive grains, the amount of diamond abrasive grains released can be increased by setting the degree of concentration of diamond abrasive grains to 200 and the degree of concentration of CBN abrasive grains to 75. Crushing frequency can be increased. Generally, it is considered that when the degree of concentration is increased, the single-grain stress is decreased, and thus the holding force is increased. In this case, it is necessary to reduce the strength of the bond and to make the resinoid bond without coating.
【００１９】使用砥粒の粒径によって対処する場合、ダ
イヤモンド砥粒を＃４００（砥粒径約５０μｍ）とし、
ＣＢＮ砥粒を＃２７０（砥粒径約７０μｍ）とすること
によって、ＣＢＮ砥粒層の砥粒保持力を１００とした場
合、ダイヤモンド砥粒の砥粒保持力を１００を７０にす
ることができる。In the case of dealing with the diameter of the abrasive grains used, the diamond abrasive grains are set to # 400 (the abrasive grain diameter is about 50 μm).
By setting the CBN abrasive grains to # 270 (the abrasive grain size is about 70 μm), when the abrasive holding power of the CBN abrasive layer is set to 100, the abrasive holding power of the diamond abrasive grains can be set to 100 to 70. .
【００２０】軟質フィラの添加によって対処する場合、
ダイヤモンド砥粒層にグラファイトを５Ｖｏｌ％程度添
加することによって、ＣＢＮ砥粒層の砥粒保持力を１０
０とした場合、ダイヤモンド砥粒層の砥粒保持力を９０
にすることができる。When coping with the addition of a soft filler,
By adding about 5% by volume of graphite to the diamond abrasive layer, the abrasive holding force of the CBN abrasive layer is reduced by 10%.
0, the abrasive holding power of the diamond abrasive layer is 90
Can be
【００２１】[0021]
【発明の実施の形態】以下本発明の特徴を図面に示す実
施の形態に基づいて具体的に説明する。ここで、図１は
本発明の一実施の形態である超砥粒砥石の正面図、図２
は同じく斜視図を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below based on embodiments shown in the drawings. Here, FIG. 1 is a front view of a superabrasive grinding wheel according to an embodiment of the present invention, and FIG.
Also shows a perspective view.
【００２２】図１、図２を参照して、１１は円盤状の台
金で、この台金１１の側面に４つの扇形セグメント１２
ａ，１２ｂ，１２ｃ，１２ｄからなるＣＢＮ砥粒層１
２、及び扇形セグメント１２ａ，１２ｂ，１２ｃ，１２
ｄの間に台金１１の中心から外周方向に向かって放射状
に形成された矩形状セグメント１３ａ，１３ｂ，１３
ｃ，１３ｄからなるダイヤモンド砥粒層１３が固着形成
されている。Referring to FIGS. 1 and 2, reference numeral 11 denotes a disk-shaped base metal, and four fan-shaped segments 12
CBN abrasive grain layer 1 consisting of a, 12b, 12c, 12d
2, and sector segments 12a, 12b, 12c, 12
d, rectangular segments 13a, 13b, 13 radially formed from the center of the base metal 11 toward the outer periphery.
A diamond abrasive layer 13 composed of c and 13d is fixedly formed.
【００２３】本実施の形態においては、ＣＢＮ砥粒層の
ボンドマトリックスをスズの含有量が２５Ｖｏｌ％のメ
タルボンドとし、またダイヤモンド砥粒層のボンドマト
リックスを銅粉含有量が５０Ｖｏｌ％のレジノイドボン
ドとすることによって、ＣＢＮ砥粒層の砥粒保持力を１
００とした場合、ダイヤモンド砥粒層の砥粒保持力を６
０としている。In the present embodiment, the bond matrix of the CBN abrasive layer is a metal bond having a tin content of 25 vol%, and the bond matrix of the diamond abrasive layer is formed of a resinoid bond having a copper powder content of 50 vol%. By doing so, the abrasive holding force of the CBN abrasive layer is 1
00, the abrasive holding power of the diamond abrasive layer is 6
It is set to 0.
【００２４】図３はこの超砥粒砥石を用いた研削の状況
を示す説明図で、まず図３（ａ）に示すように、研削前
には砥粒層表面にはほぼ同じ高さで、ＣＢＮ砥粒とダイ
ヤモンド砥粒が突出している。これによって、研削が進
むと、図３（ｂ）に示すように、ダイヤモンド砥粒がＣ
ＢＮ砥粒よりも早く脱落し、遊離砥粒となる。そして遊
離したダイヤモンド砥粒がＣＢＮ砥粒層へ移動し、ダイ
ヤモンド砥粒がＣＢＮ砥粒に衝突して破砕し、鋭利な状
態に変化させることができる。FIG. 3 is an explanatory view showing the state of grinding using this superabrasive grindstone. First, as shown in FIG. 3 (a), before grinding, the surface of the abrasive layer has almost the same height. CBN abrasive grains and diamond abrasive grains protrude. As a result, when the grinding proceeds, as shown in FIG.
They fall off earlier than BN abrasive grains and become loose abrasive grains. Then, the released diamond abrasive grains move to the CBN abrasive grain layer, and the diamond abrasive grains collide with the CBN abrasive grains so as to be crushed and changed to a sharp state.
【００２５】図４は他の実施の形態を示す超砥粒砥石の
正面図であり、同図において、１４ａ，１４ｂ，１４ｃ
はそれぞれＣＢＮ砥粒層を、また１５ａ，１５ｂはダイ
ヤモンド砥粒層を示す。FIG. 4 is a front view of a superabrasive grindstone showing another embodiment, in which 14a, 14b and 14c are shown.
Represents a CBN abrasive layer, and 15a and 15b represent diamond abrasive layers.
【００２６】本実施の形態のように、円盤状台金（図示
せず）の中心を中心にした同心円状のダイヤモンド砥粒
層１５ａ，１５ｂを形成することによっても、上記と同
様にダイヤモンドが早期に脱落してＣＢＮ砥粒層に衝突
し、使用によって平坦になったＣＢＮ砥粒の表面を鋭利
な状態に戻すことができる。By forming concentric diamond abrasive layers 15a and 15b centered on the center of a disk-shaped base (not shown) as in the present embodiment, the diamond can be quickly formed in the same manner as described above. , And collides with the CBN abrasive grain layer, and the surface of the CBN abrasive grain which has become flat by use can be returned to a sharp state.
【００２７】[0027]
【実施例】本発明の効果を確認するために、ダイヤモン
ド砥粒層を放射状に形成した図１に示す実施の形態１、
同じく同心円状に形成した図４に示す実施の形態２、及
び比較例として同一のボンドマトリクス中にダイヤモン
ド砥粒とＣＢＮ砥粒とを分散させた比較例を用いて実験
を行った。なお他の条件は発明品および比較例とも同じ
とした。次にその実験条件を示す。EXAMPLE In order to confirm the effect of the present invention, the first embodiment shown in FIG.
An experiment was conducted using the second embodiment shown in FIG. 4 which was also formed concentrically, and a comparative example in which diamond abrasive grains and CBN abrasive grains were dispersed in the same bond matrix as a comparative example. The other conditions were the same for the invention product and the comparative example. Next, the experimental conditions will be described.
【００２８】被削材：冷機用ロータリーコンプレッサ部
品 ５０D ×４５T ×４８H ｍｍ 研削機：立軸両頭平面研削盤 切込速度：３００μｍ／ｍｉｎ 砥石寸法：３０５D ×５０T ×５０H 取り代 ：５０μｍ（上下面合計） 目標平行度：１μｍWork material: Rotary compressor parts for refrigerator 50 D × 45 T × 48 H mm Grinding machine: Vertical shaft double-sided surface grinding machine Cutting speed: 300 μm / min Grinding wheel dimensions: 305 D × 50 T × 50 H 50 μm (total of upper and lower surfaces) Target parallelism: 1 μm
【００２９】結果は実施の形態１では、被削材を４００
個加工しても平行度は１μｍ以下であり、また実施の形
態２でも同様の結果が得られた。特に、切れ味が安定し
ているため高精度な加工ができた点で顕著な効果が確認
されたのに対し、比較例では、３００個加工した時点で
平行度が２μｍとなり、本発明品に明らかな優位性がみ
られた。As a result, in the first embodiment, the work material was 400
The parallelism was 1 μm or less even after the individual processing, and the same result was obtained in the second embodiment. In particular, a remarkable effect was confirmed in that high-precision processing was performed because the sharpness was stable, whereas in the comparative example, the parallelism became 2 μm at the time of processing 300 pieces, which is clear for the product of the present invention. Superiority was seen.
【００３０】次いで、図１に示す構造のものを用い、Ｃ
ＢＮ砥粒層１２とダイヤモンド砥粒層１３の砥粒保持力
の差を変化させた場合のダイヤモンド砥粒の脱粒率の変
化状況を観察した。なお、砥粒保持力の差はボンド強度
を調整することにより行った。図５の横軸は砥粒保持力
の差を、また縦軸は研削抵抗の変化をそれぞれ示す。Next, using the structure shown in FIG.
The state of change in the removal rate of diamond abrasive grains when the difference in the abrasive holding force between the BN abrasive layer 12 and the diamond abrasive layer 13 was changed was observed. Note that the difference in the abrasive grain holding power was determined by adjusting the bond strength. The horizontal axis in FIG. 5 shows the difference in the abrasive grain holding power, and the vertical axis shows the change in the grinding resistance.
【００３１】図５に示すとおり、ダイヤモンド砥粒層の
砥粒保持力が６０〜９５の範囲であることが望ましい。
ダイヤモンド砥粒層の砥粒保持力が６０未満であると切
れ味の向上率は低下し、砥石磨耗が大きくなり、また９
５を越えると切れ味の向上効果が小さくなった。As shown in FIG. 5, it is desirable that the abrasive holding force of the diamond abrasive layer be in the range of 60 to 95.
If the abrasive holding power of the diamond abrasive layer is less than 60, the improvement rate of sharpness is reduced, and the wear of the grinding wheel is increased.
If it exceeds 5, the effect of improving sharpness is reduced.
【００３２】図６はダイヤモンド砥粒層１３の幅の変化
と研削抵抗の変化を示すグラフで、幅が１．５ｍｍ未満
であると切れ味の向上効果が小さくなり、２０ｍｍを越
えると砥石磨耗が大きくなり実用的でなくなった。FIG. 6 is a graph showing a change in the width of the diamond abrasive grain layer 13 and a change in the grinding resistance. When the width is less than 1.5 mm, the effect of improving sharpness is reduced, and when the width exceeds 20 mm, the wear of the grinding wheel is increased. It is no longer practical.
【００３３】上記実施例の他、スズの含有量が２５Ｖｏ
ｌ％のメタルボンドに対し、銅の含有量が５０Ｖｏｌ％
のレジノイドボンドは約６０％の強度となり、同様の効
果が得られた。In addition to the above embodiment, the tin content was 25 Vo
Copper content is 50Vol% for 1% metal bond
Has a strength of about 60%, and the same effect is obtained.
【００３４】また同様に、ＣＢＮ砥粒層のコンセントレ
ーションを２００とし、ダイヤモンド砥粒層を１５０に
して単粒応力を３３％増大させることによっても、砥粒
保持力に差を設けることができた。Similarly, the difference in abrasive grain holding power could also be provided by increasing the single grain stress by 33% by setting the concentration of the CBN abrasive layer to 200 and the diamond abrasive layer to 150. .
【００３５】さらに、ダイヤモンドの砥粒径をＣＢＮの
砥粒径よりも小さくすることにより、ダイヤモンド砥粒
のボンド面からの脱粒がＣＢＮよりも早くなり、同様の
効果が得られる。またグラファイトなどの軟質フィラを
５Ｖｏｌ％程度添加し、強度を１０％程度低下させるこ
とによっても達成できた。Further, by making the abrasive particle size of diamond smaller than that of CBN, the removal of diamond abrasive particles from the bond surface becomes faster than that of CBN, and the same effect can be obtained. It was also achieved by adding about 5% by volume of a soft filler such as graphite and reducing the strength by about 10%.
【００３６】[0036]
【発明の効果】本発明によって以下の効果を奏すること
ができる。According to the present invention, the following effects can be obtained.
【００３７】（ａ）砥粒層をダイヤモンド砥粒層とＣＢ
Ｎ砥粒層とから構成し、かつダイヤモンド砥粒層の砥粒
保持力をＣＢＮ砥粒層の砥粒保持力よりも弱くしたこと
によって、遊離したダイヤモンド砥粒がＣＢＮ砥粒に衝
突し、ＣＢＮ砥粒の一部を破壊して鋭利な状態とし、結
果として長期にわたって良好な切れ味を持続することが
できる。(A) The abrasive layer is composed of a diamond abrasive layer and CB
N abrasive grains, and the diamond abrasive grains having a lower abrasive holding power than the CBN abrasive grains have their abrasive holding power weaker than the CBN abrasive grains. A part of the abrasive grains is broken to a sharp state, and as a result, good sharpness can be maintained for a long period of time.
【００３８】（ｂ）ＣＢＮ砥粒層の砥粒保持力を１００
とし、ダイヤモンド砥粒層の砥粒保持力を６０〜９５の
範囲とすることによって、ダイヤモンド砥粒の脱粒度合
いをコントロールすることができ、被削材や加工方法に
適した切れ味を長期に渡り持続することが可能となる。(B) The abrasive holding force of the CBN abrasive layer is 100
By setting the abrasive holding force of the diamond abrasive layer in the range of 60 to 95, the degree of shedding of the diamond abrasive can be controlled, and the sharpness suitable for the work material and the processing method is maintained for a long time. It is possible to do.
【００３９】（ｃ）全砥粒層面積に対するダイヤモンド
砥粒層面積の割合を１〜３０％とすることによって、Ｃ
ＢＮ砥粒に充分な切れ味を与え有効に作用させることが
できる。(C) By setting the ratio of the area of the diamond abrasive layer to the total area of the abrasive layer to 1 to 30%, C
BN abrasive grains can be given sufficient sharpness and effectively act.
【００４０】（ｄ）切れ味が良く安定持続するため、難
削材を高能率・高精度に研削でき、そり、焼け、変形を
生じない高品位な研削ができる。(D) Since the sharpness is stable and stable, difficult-to-cut materials can be ground with high efficiency and high precision, and high-quality grinding without warpage, burning or deformation can be performed.
【図１】本発明の一実施の形態である超砥粒砥石の正面
図である。FIG. 1 is a front view of a superabrasive grinding wheel according to an embodiment of the present invention.
【図２】図１の超砥粒砥石の斜視図である。FIG. 2 is a perspective view of the superabrasive grinding wheel shown in FIG.
【図３】本発明の超砥粒砥石の作用を示す説明図であ
る。FIG. 3 is an explanatory diagram showing the operation of the superabrasive grindstone of the present invention.
【図４】本発明の他の実施の形態である超砥粒砥石の正
面図である。FIG. 4 is a front view of a superabrasive grinding wheel according to another embodiment of the present invention.
【図５】砥粒保持力の差と研削抵抗の関係を示すグラフ
である。FIG. 5 is a graph showing the relationship between the difference in abrasive holding power and the grinding resistance.
【図６】ダイヤモンド砥粒層の幅の変化と研削抵抗の関
係を示すグラフである。FIG. 6 is a graph showing a relationship between a change in width of a diamond abrasive grain layer and a grinding resistance.
【図７】本発明の超砥粒砥石の作用を示す説明図であ
る。FIG. 7 is an explanatory view showing the operation of the superabrasive grinding wheel of the present invention.
１１ 台金 １２，１４ａ，１４ｂ ＣＢＮ砥粒層 １２ａ，１２ｂ，１２ｃ，１２ｄ 扇形セグメント １３，１５ａ，１５ｂ ダイヤモンド砥粒層 １３ａ，１３ｂ，１３ｃ，１３ｄ 矩形状セグメント 11 base metal 12, 14a, 14b CBN abrasive layer 12a, 12b, 12c, 12d sector-shaped segment 13, 15a, 15b diamond abrasive layer 13a, 13b, 13c, 13d rectangular segment
Claims (6)
た超砥粒砥石において、前記超砥粒層をダイヤモンド砥
粒層とＣＢＮ砥粒層とから構成し、かつ前記ダイヤモン
ド砥粒層の砥粒保持力を前記ＣＢＮ砥粒層の砥粒保持力
よりも弱くしたことを特徴とする超砥粒砥石。1. A superabrasive grindstone in which a superabrasive layer is fixedly formed on one surface of a disk-shaped base metal, wherein the superabrasive layer comprises a diamond abrasive layer and a CBN abrasive layer, and A superabrasive grinding wheel, characterized in that the abrasive holding power of the layer is weaker than the abrasive holding power of the CBN abrasive layer.
金の中心から外周方向に向けて放射状に形成したことを
特徴とする請求項１記載の超砥粒砥石。2. The superabrasive grinding wheel according to claim 1, wherein said diamond abrasive layer is formed radially from a center of said disk-shaped base metal toward an outer peripheral direction.
金の中心を中心とした複数の同心円状に形成したことを
特徴とする請求項１記載の超砥粒砥石。3. The super-abrasive grinding wheel according to claim 1, wherein said diamond abrasive layer is formed in a plurality of concentric circles centered on a center of said disk-shaped base metal.
とした場合、前記ダイヤモンド砥粒層の砥粒保持力を６
０〜９５の範囲としたことを特徴とする請求項１〜３記
載の超砥粒砥石。4. The abrasive grain holding force of the CBN abrasive grain layer is 100
, The abrasive holding power of the diamond abrasive layer is 6
The superabrasive grinding wheel according to any one of claims 1 to 3, wherein the range is from 0 to 95.
の砥粒保持力の差を、ボンドマトリックスの種類、集中
度、使用砥粒の粒径、軟質フィラの添加量のいずれか又
はこれらの組み合わせによって達成していることを特徴
とする請求項１〜４記載の超砥粒砥石。5. The difference in abrasive holding power between the diamond abrasive layer and the CBN abrasive layer is determined by any one of the type of bond matrix, the degree of concentration, the particle diameter of the abrasive used, and the amount of soft filler added, or any of these. 5. The superabrasive grinding wheel according to claim 1, which is achieved by a combination.
層面積の割合が１〜３０％であることを特徴とする請求
項１〜５記載の超砥粒砥石。6. The super-abrasive grinding wheel according to claim 1, wherein the ratio of the area of the diamond abrasive layer to the total area of the abrasive layer is 1 to 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31204096A JP3347612B2 (en) | 1996-11-22 | 1996-11-22 | Super abrasive whetstone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31204096A JP3347612B2 (en) | 1996-11-22 | 1996-11-22 | Super abrasive whetstone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10151571A true JPH10151571A (en) | 1998-06-09 |
| JP3347612B2 JP3347612B2 (en) | 2002-11-20 |
Family
ID=18024498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31204096A Expired - Fee Related JP3347612B2 (en) | 1996-11-22 | 1996-11-22 | Super abrasive whetstone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3347612B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039829A (en) * | 2007-08-09 | 2009-02-26 | Nippon Sheet Glass Co Ltd | Diamond wheel |
| JP2009113194A (en) * | 2007-10-17 | 2009-05-28 | Mezoteku Dia Kk | Grinding wheel |
| DE102008052824A1 (en) * | 2008-10-14 | 2010-04-22 | Flex-Elektrowerkzeuge Gmbh | Tile cleaning/grinding tool, has pressurization device with set of pressurization sectors comprising corresponding brush and sponge areas differently and successively acting on surface to be cleaned, when cleaning/grinding tool is driven |
| CN107297688A (en) * | 2017-07-28 | 2017-10-27 | 义乌市台荣超硬制品有限公司 | A kind of resin bonding agent diamond or CBN tool tyre case powder |
| CN111660212A (en) * | 2020-07-02 | 2020-09-15 | 江苏超峰工具有限公司 | Hot-pressed sintered grinding wheel and process thereof |
| US20220203502A1 (en) * | 2020-12-29 | 2022-06-30 | Saint-Gobain Abrasives, Inc. | Abrasive article and method of use |
| CN114746215A (en) * | 2020-01-06 | 2022-07-12 | 圣戈班磨料磨具有限公司 | Abrasive article and method of using same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059659A (en) * | 2009-11-13 | 2011-05-18 | 沈阳中科超硬磨具磨削研究所 | Formula system for abrasive layer of resin cubic boron nitride (CBN) end face grinding wheel |
| DE102019122711A1 (en) * | 2019-08-23 | 2021-02-25 | Atlantic Gmbh | Three-layer grinding wheel |
-
1996
- 1996-11-22 JP JP31204096A patent/JP3347612B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039829A (en) * | 2007-08-09 | 2009-02-26 | Nippon Sheet Glass Co Ltd | Diamond wheel |
| JP2009113194A (en) * | 2007-10-17 | 2009-05-28 | Mezoteku Dia Kk | Grinding wheel |
| DE102008052824A1 (en) * | 2008-10-14 | 2010-04-22 | Flex-Elektrowerkzeuge Gmbh | Tile cleaning/grinding tool, has pressurization device with set of pressurization sectors comprising corresponding brush and sponge areas differently and successively acting on surface to be cleaned, when cleaning/grinding tool is driven |
| CN107297688A (en) * | 2017-07-28 | 2017-10-27 | 义乌市台荣超硬制品有限公司 | A kind of resin bonding agent diamond or CBN tool tyre case powder |
| CN114746215A (en) * | 2020-01-06 | 2022-07-12 | 圣戈班磨料磨具有限公司 | Abrasive article and method of using same |
| JP2023504283A (en) * | 2020-01-06 | 2023-02-02 | サンーゴバン アブレイシブズ，インコーポレイティド | Abrasive article and method of use thereof |
| CN111660212A (en) * | 2020-07-02 | 2020-09-15 | 江苏超峰工具有限公司 | Hot-pressed sintered grinding wheel and process thereof |
| US20220203502A1 (en) * | 2020-12-29 | 2022-06-30 | Saint-Gobain Abrasives, Inc. | Abrasive article and method of use |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3347612B2 (en) | 2002-11-20 |
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