JPH05285852A - Grinding tool - Google Patents
Grinding toolInfo
- Publication number
- JPH05285852A JPH05285852A JP9060592A JP9060592A JPH05285852A JP H05285852 A JPH05285852 A JP H05285852A JP 9060592 A JP9060592 A JP 9060592A JP 9060592 A JP9060592 A JP 9060592A JP H05285852 A JPH05285852 A JP H05285852A
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- grinding tool
- workpiece
- end surface
- tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は研削工具に関し、とく
に、その使用面の構造技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding tool and, more particularly, to a structural technique for its use surface.
【０００２】[0002]
【従来の技術】一般に、加工物に研削を施して平面加工
を行うにあたっては、基端側がシャンク部とされ、砥粒
を備える先端面が使用面とされる研削工具（砥石）が用
いられる。その代表的な研削工具が、図７に示すカップ
形砥石である。このカップ形砥石７０においては、砥粒
を備える先端面７１を加工物に接触させた状態で、その
軸部たるシャンク部７２を介して、カップ形砥石７０
を、中心軸線Ｌ7 を回転中心線として回転させながら、
加工物の表面上を送り移動させて、そこに平面研削加工
を施す。2. Description of the Related Art Generally, when a workpiece is ground to perform planar processing, a grinding tool (grinding stone) is used in which the base end side is a shank portion and the tip end surface including abrasive grains is a use surface. The typical grinding tool is the cup-shaped grindstone shown in FIG. In this cup-shaped grindstone 70, the cup-shaped grindstone 70 is passed through a shank portion 72, which is a shaft portion of the cup-shaped grindstone 70 in a state where a tip end surface 71 including abrasive grains is in contact with a workpiece.
While rotating with the central axis L 7 as the rotation center line,
The surface of the workpiece is fed and moved, and the surface is ground there.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
カップ形砥石７０においては、加工物を実質的に研削す
るのは、外周側面７３と先端面７１との稜線部分７４付
近のみであるため、その研削効率が低いという問題点が
ある。また、先端面７１が平坦面であるため、側方から
加工液を供給しても、加工液は研削点に対して充分に供
給されず、そこに発生した加工熱を充分に除去できない
ので、加工物の側に焼けなどが発生しやすいという問題
点もある。However, in the conventional cup-shaped grindstone 70, the workpiece is substantially ground only in the vicinity of the ridge line portion 74 between the outer peripheral side surface 73 and the tip surface 71. There is a problem that the grinding efficiency is low. Further, since the tip surface 71 is a flat surface, even if the machining fluid is supplied from the side, the machining fluid is not sufficiently supplied to the grinding point, and the machining heat generated there cannot be sufficiently removed. There is also a problem that burns are likely to occur on the side of the work piece.
【０００４】このような問題点を解消するために、たと
えば、図８に示すように、カップ形砥石８０の先端面８
１に、その外周側８１ａから内周側８１ｂに向けてテー
パ８２をつけて逃げ形とする構造が考えられる。また、
図９（ａ）および図９（ｂ）に示すように、カップ形砥
石９０の先端面９１に対して、その内周側９１ａから外
周側９１ｂに溝９２を設けて、外周側９１ｂ（稜線部
分）への加工液の供給を容易とした構造も考えられる。
しかしながら、これらの構造によれば、加工液を研削点
に供給しやすくなるので、冷却効率は向上する傾向にあ
るが、先端面８１，９１の平坦領域が依然として広い面
積を占めているため、その改善効果としては未だ不十分
である。しかも、実質的な研削部は拡張されていないの
で、研削効率は改善されていない。In order to solve such a problem, for example, as shown in FIG. 8, the tip surface 8 of the cup-shaped grindstone 80.
It is conceivable that the first structure has a taper 82 from the outer peripheral side 81a toward the inner peripheral side 81b to form a relief shape. Also,
As shown in FIGS. 9 (a) and 9 (b), a groove 92 is provided from the inner peripheral side 91a to the outer peripheral side 91b of the tip surface 91 of the cup-shaped grindstone 90 so that the outer peripheral side 91b (ridge line portion). It is also conceivable that the structure facilitates the supply of the working fluid to
However, according to these structures, the machining liquid tends to be supplied to the grinding point, so that the cooling efficiency tends to improve, but the flat regions of the tip surfaces 81 and 91 still occupy a large area. The improvement effect is still insufficient. Moreover, since the substantial grinding portion is not expanded, the grinding efficiency is not improved.
【０００５】以上の問題点に鑑みて、本発明の課題は、
使用面とされる先端面の円周方向に多数の研削部を断続
的に設ける一方、これらの研削部の間を利用して、加工
液を効率よく供給し、研削効率および冷却効率のいずれ
をも向上可能な研削工具を実現することにある。In view of the above problems, the object of the present invention is to
While a large number of grinding parts are intermittently provided in the circumferential direction of the tip surface, which is the surface to be used, the machining liquid is efficiently supplied by utilizing the space between these grinding parts to improve the grinding efficiency and cooling efficiency. It is to realize a grinding tool that can be improved.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、本発明においては、基端側がシャンク部とされ、砥
粒を備える先端面側が使用面とされる研削工具に対し
て、先端面側には、その円周方向に、その内周側から外
周側に向かう縁部によって加工物表面を研削可能な多数
の研削部を断続的に形成しておくことである。In order to solve the above-mentioned problems, in the present invention, the tip end surface is compared with the grinding tool in which the base end side is the shank portion and the tip end surface side including abrasive grains is the use surface. On the side, a large number of grinding portions capable of grinding the surface of the work piece by the edges extending from the inner peripheral side to the outer peripheral side in the circumferential direction are intermittently formed.
【０００７】ここで、先端面をその円周方向に向かって
うねり形状をもつように形成し、その頂上側で研削部を
構成することができる。Here, it is possible to form the tip end surface so as to have an undulating shape in the circumferential direction, and form the grinding portion on the top side thereof.
【０００８】また、研削部を、たとえば、研削工具の中
心軸線側から側方に向かって放射状に延出する多数の板
状部の端面で構成することができる。Further, the grinding portion may be constituted by, for example, end faces of a large number of plate-shaped portions radially extending laterally from the central axis side of the grinding tool.
【０００９】さらに、研削工具の内部に、その基端側端
面から先端面にまで貫通する加工液供給通路を形成して
おくことが好ましい。Further, it is preferable to form a machining liquid supply passage which penetrates from the base end side end surface to the tip end surface inside the grinding tool.
【００１０】[0010]
【作用】上記手段を講じた本発明に係る研削工具におい
ては、先端面の円周方向に、その内周側から外周側に向
かう縁部によって加工物表面を研削可能な多数の研削部
が断続的に形成してあるため、研削工具を、その中心軸
線を回転中心線として回転させながら、その先端面側を
加工物表面に接触させると、研削工具の回転動作によっ
て、研削部の縁部は加工物表面を研削する。ここで、研
削部の縁部は、先端面の内周側から外周側に向かって形
成されているので、研削工具の回転による研削可能な範
囲が広く、しかも、研削部は先端面の円周方向に断続的
に多数形成されているので、その研削効率が高い。ま
た、研削部は断続的に形成されているため、それらの間
には隙間が存在する。従って、研削部と加工物との間に
供給された加工液は、研削部間の各隙間を介して効率よ
く研削部（研削点）に供給されると共に、これらの隙間
を介して効率よく除去されるので、冷却効率および切屑
の除去効率のいずれもが高い。さらに、研削工具の加工
物に対する接触面積が小さいため、研削工具の先端面と
加工物との加工抵抗が小さい。従って、振動やビビリな
どが発生しないので、加工精度が高い。In the grinding tool according to the present invention having the above-described means, a large number of grinding portions capable of grinding the surface of the workpiece are intermittently formed in the circumferential direction of the tip surface by the edge portions extending from the inner peripheral side to the outer peripheral side. Since the grinding tool is formed in a circular shape, the tip end side of the grinding tool is brought into contact with the workpiece surface while the center axis of the grinding tool is rotated. Grind the work surface. Here, since the edge portion of the grinding portion is formed from the inner peripheral side to the outer peripheral side of the tip surface, the grindable range by the rotation of the grinding tool is wide, and the grinding portion is the circumference of the tip surface. Since it is formed in large numbers intermittently in the direction, its grinding efficiency is high. Further, since the grinding portion is formed intermittently, there is a gap between them. Therefore, the machining liquid supplied between the grinding section and the workpiece is efficiently supplied to the grinding section (grinding point) through each gap between the grinding sections and is efficiently removed through these gaps. Therefore, both cooling efficiency and chip removal efficiency are high. Furthermore, since the contact area of the grinding tool with the workpiece is small, the machining resistance between the tip surface of the grinding tool and the workpiece is small. Therefore, since vibration and chattering do not occur, the processing accuracy is high.
【００１１】[0011]
【実施例】つぎに、添付図面を参照して、本発明の実施
例に係る研削工具について説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a grinding tool according to an embodiment of the present invention will be described with reference to the accompanying drawings.
【００１２】〔実施例１〕図１（ａ）は本発明の実施例
１に係る研削工具の部分断面図、図１（ｂ）はその底面
図である。[Embodiment 1] FIG. 1A is a partial sectional view of a grinding tool according to Embodiment 1 of the present invention, and FIG. 1B is a bottom view thereof.
【００１３】これらの図において、本例の研削工具１０
は、軸付きの平面研削用砥石（立軸研削砥石）であっ
て、その基端側には、研削装置のチャック（図示せず）
に保持される軸部たるシャンク部１１と、このシャンク
部１１と一体に形成されて、シャンク部１１の外径に比
して大きな外径を有する砥石本体部１２とを有し、この
砥石本体部１２の先端面１３の中央領域には凹部１２１
が形成されて、研削工具１０はカップ形砥石形状を呈し
ている。ここで、砥石本体部１２の先端面１３が研削工
具１０の使用面とされるが、この先端面１３の表面形状
は、その円周方向に向かってうねりをもって形成され
て、その頂上１３１ａ（縁部）の側が加工物に接触して
それを研削する研削部１３１になっている一方、その谷
１３２ａの側には隙間１３２が形成されている。また、
先端面１３の頂上１３１ａおよび谷１３２ａは、研削工
具１０の中心軸線Ｌ1 （回転中心線）の側から外周に向
かって放射状に形成されているため、研削部１３１は先
端面１３の円周方向に断続的に形成された状態にあり、
いずれの研削部１３１の頂上１３１ａも先端面１３の内
周側から外周側に向かう状態にある。さらに、研削工具
１０の内部には、その基端側たるシャンク部１１の端面
から先端面１３にまで貫通する加工液供給通路１４が中
心軸線Ｌ1 と同心状に形成されている。In these figures, the grinding tool 10 of this example is shown.
Is a grindstone for surface grinding with a shaft (vertical grindstone), and a chuck (not shown) of a grinding device is provided on the base end side thereof.
A shank portion 11 that is a shaft portion that is held by the shank portion, and a whetstone body portion 12 that is integrally formed with the shank portion 11 and has a larger outer diameter than the outer diameter of the shank portion 11. A concave portion 121 is formed in the central region of the tip surface 13 of the portion 12.
Is formed, and the grinding tool 10 has a cup-shaped grindstone shape. Here, the tip end surface 13 of the grindstone main body 12 is used as the surface for use of the grinding tool 10. The surface shape of the tip end surface 13 is formed with a waviness in the circumferential direction, and its top 131a (edge The (part) side is a grinding part 131 that comes into contact with the workpiece and grinds it, while a gap 132 is formed on the valley 132a side. Also,
Since the peaks 131a and the valleys 132a of the tip surface 13 are formed radially from the side of the central axis L 1 (rotation center line) of the grinding tool 10 toward the outer circumference, the grinding portion 131 is formed in the circumferential direction of the tip surface 13. Is formed in the intermittent
The tops 131a of any of the grinding parts 131 are in a state of going from the inner peripheral side to the outer peripheral side of the tip surface 13. Further, inside the grinding tool 10, a machining liquid supply passage 14 penetrating from the end face of the shank portion 11 on the base end side thereof to the tip face 13 is formed concentrically with the central axis L 1 .
【００１４】また、研削工具１０は、シャンク部１１お
よび砥石本体部１２に対応した形状の母材を形成した後
に、図２に示すように、少なくとも先端面１３に対して
ダイヤモンドや六方晶系の窒化ほう素からなる砥粒１０
１を電着することによって形成したものであって、その
先端面１３１の側には砥粒１０１を備える。従って、研
削工具１０を、その中心軸線Ｌ1 を回転中心線として、
図１（ｂ）に矢印Ａに示す方向に回転させながら、その
使用面たる先端面１３を加工物Ｗに接触させると、研削
部１３１のうち、頂上１３１ａに対して回転方向（矢印
Ａの方向）の側の斜面が加工物Ｗに対する研削点となっ
て、その領域に固着されている砥粒１０１は、加工物Ｗ
を研削する。ここで、研削部１３１における頂上１３１
ａ付近の斜面の面方向（一点鎖線Ｂで示す。）と、一点
鎖線Ｃで示す先端面１３の面方向とが形成する角度θ
（以下、当たり角度θと称する。）は、そこに固着され
る砥粒１０１の粒径によって所定の角度に設定される。
すなわち、図３（ａ）に示すように、小さな粒径の砥粒
１０１ａを固着した場合の切込み深さｔa （切込み量）
と、図３（ｂ）に示すように、大きな粒径の砥粒１０１
ｂを固着した場合の切込み深さｔb （切込み量）とを比
較すると、大きな粒径の砥粒１０１ｂを固着した場合の
方が切込み深さ（切込み量）が大きい。従って、小さな
粒径の砥粒１０１ａを固着した場合および大きな粒径の
砥粒１０１ｂを固着した場合のいずれの場合であって
も、加工物Ｗに対する砥粒１０１の数を等しくして、そ
の研削効率を高める目的に、大きな粒径の砥粒１０１ｂ
を固着した場合の当たり角度θb を、小さな粒径の砥粒
１０１ａを固着した場合の当たり角度θa （切込み量）
に比して大きく設定してある。なお、当たり角度θは、
先端面１３における頂上１３１ａの両側の斜面のうち、
回転方向（矢印Ａの方向）の側の斜面のみを所定の条件
に設定すればよく、反対側の斜面については、たとえ
ば、図２に二点鎖線Ｄで示すように、先端面１３の面方
向（一点鎖線Ｃ）に対して垂直面になっていてもよい。Further, in the grinding tool 10, after forming a base material having a shape corresponding to the shank portion 11 and the grindstone body portion 12, as shown in FIG. 2, at least the tip surface 13 is made of diamond or hexagonal crystal. Abrasive grain 10 made of boron nitride
1 is formed by electrodeposition, and abrasive grains 101 are provided on the tip surface 131 side thereof. Therefore, with the center axis L 1 of the grinding tool 10 as the rotation center line,
When the tip surface 13 that is the use surface is brought into contact with the workpiece W while rotating in the direction indicated by the arrow A in FIG. 1B, the rotation direction (the direction indicated by the arrow A) with respect to the top 131a of the grinding portion 131. ) Side slopes serve as grinding points for the workpiece W, and the abrasive grains 101 fixed to the area are the workpiece W.
To grind. Here, the top 131 of the grinding unit 131
An angle θ formed by the surface direction of the inclined surface near a (shown by the chain line B) and the surface direction of the tip surface 13 shown by the chain line C.
(Hereinafter, referred to as a hitting angle θ) is set to a predetermined angle depending on the particle size of the abrasive grains 101 adhered thereto.
That is, as shown in FIG. 3A, the cutting depth t a (cutting amount) when the abrasive grains 101a having a small grain size are fixed
Then, as shown in FIG.
Comparing with the cutting depth t b (cutting amount) when b is fixed, the cutting depth (cutting amount) is larger when the abrasive grains 101 b having a larger grain size are fixed. Therefore, regardless of whether the abrasive grains 101a having a small grain size are fixed or the abrasive grains 101b having a large grain size are fixed, the number of the abrasive grains 101 with respect to the workpiece W is made equal and the grinding is performed. Abrasive grains 101b with a large grain size for the purpose of increasing efficiency
Abutting angle θ b when the abrading is adhered, and abutting angle θ a when abrading particles 101a having a small grain size are adhered (cut amount)
It is set larger than. The contact angle θ is
Of the slopes on both sides of the top 131a of the tip surface 13,
It is sufficient to set only the slope on the side in the rotation direction (direction of arrow A) to a predetermined condition. For the slope on the opposite side, for example, as shown by the chain double-dashed line D in FIG. The surface may be perpendicular to the (dashed line C).
【００１５】このような構成の研削工具１０において、
研削工具１０を、その中心軸線Ｌ1を回転中心線として
回転させながら、その先端面１３を加工物Ｗに接触させ
ると、研削部１３１のうちの頂上１３１ａの側によっ
て、加工物Ｗは研削される。また、研削工具１０の送り
移動によって、先端面１３と外周側面部１２３との稜線
側１２３ａによっても、加工物Ｗは研削される。ここ
で、研削工具１０の先端面１３は、その内周側から外周
側に向かう頂上１３１ａを備える研削部１３１を有する
ため、研削工具１０の回転によって研削する範囲が広
く、しかも、多数の研削部１３１が先端面１３の円周方
向に向かって形成されている。従って、研削工具１０の
加工物Ｗに対する研削効率が高い。ここで、研削加工に
おいて発生する加工熱は切削加工に比較してもとより大
きく、また、発生熱量の大部分は加工物Ｗの側に入るた
め、加工熱によって、加工物Ｗおよび研削工具１０に熱
的な損傷が生じないように、研削加工中の研削部１３１
と加工物Ｗとの間に加工液を供給する必要があるが、本
例の研削工具１０においては、その内部に加工液供給通
路１４が形成されているため、その加工液供給通路１４
を介して、加工液を先端面１３から加工物Ｗに対して直
接に供給する。しかも、供給された加工液は、隙間１３
２を介して効率よく研削部（研削点）に供給されると共
に、隙間１３２を介して効率よく除去されるので、冷却
効率が高い。ここで、研削加工によって生じた切屑は、
加工液と共に効率よく除去されるので、加工精度も高
い。また、研削工具１０の加工物Ｗに対する接触面積
（当たり面積）が狭いため、研削工具１０の先端面１３
と加工物Ｗとの加工抵抗が小さい。従って、振動やビビ
リなどが発生しないので、加工精度が高い。さらに、深
さ方向の切込み量を増大させて、加工効率をさらに高め
ることもできる。In the grinding tool 10 having such a structure,
When the tip surface 13 of the grinding tool 10 is brought into contact with the workpiece W while rotating the central axis L 1 as the rotation center line, the workpiece W is ground by the side of the top 131 a of the grinding section 131. It Further, the workpiece W is also ground by the ridge line side 123a of the tip surface 13 and the outer peripheral side surface portion 123 by the feed movement of the grinding tool 10. Here, since the tip surface 13 of the grinding tool 10 has the grinding portion 131 having the apex 131a extending from the inner circumference side to the outer circumference side, the grinding range of the grinding tool 10 is wide and the number of grinding portions is large. 131 is formed in the circumferential direction of the tip surface 13. Therefore, the grinding efficiency of the grinding tool 10 with respect to the workpiece W is high. Here, the processing heat generated in the grinding process is larger than that in the cutting process, and most of the generated heat amount enters the side of the workpiece W. Therefore, the processing heat generates heat in the workpiece W and the grinding tool 10. The grinding part 131 during the grinding process so that no mechanical damage occurs.
It is necessary to supply the machining fluid between the workpiece and the workpiece W. However, in the grinding tool 10 of this example, the machining fluid supply passage 14 is formed inside the machining tool, so that the machining fluid supply passage 14
The machining liquid is directly supplied to the workpiece W from the front end surface 13 via. Moreover, the supplied working fluid is
It is efficiently supplied to the grinding part (grinding point) via 2 and is efficiently removed via the gap 132, so that the cooling efficiency is high. Here, the chips produced by the grinding process are
Since it is efficiently removed together with the processing liquid, the processing accuracy is high. Further, since the contact area (contact area) of the grinding tool 10 with the workpiece W is small, the tip surface 13 of the grinding tool 10 is small.
The processing resistance between the workpiece W and the workpiece W is small. Therefore, since vibration and chattering do not occur, the processing accuracy is high. Further, it is possible to further increase the cutting efficiency by increasing the depth of cut.
【００１６】〔実施例２〕図４は本発明の実施例２に係
る研削工具の斜視図である。[Second Embodiment] FIG. 4 is a perspective view of a grinding tool according to a second embodiment of the present invention.
【００１７】この図において、本例の研削工具２０は、
軸付きの平面研削用砥石（立軸研削砥石）であって、そ
の基端側には、研削装置のチャック（図示せず）に保持
される軸部たるシャンク部２１と、このシャンク部２１
と一体に形成されて、シャンク部２１の外径に比して大
きな外径輪郭を有する砥石本体部２２とを有する。ここ
で、砥石本体部２２は、研削工具２０の中心軸線Ｌ
2 （回転中心線）の側から外周に向かって放射状に形成
された１２の板状部２２ａとして形成されており、各板
状部２２ａの端面で構成された研削部２３１によって、
研削工具２０の先端面２３が構成された状態にある。こ
のため、板状部２２ａの端面、すなわち、多数の研削部
２３１が、先端面２３の円周方向に向かって断続的に形
成された状態にあって、いずれの研削部２３１も、その
内周側から外周側に向かう稜線部２３１ａ（縁部）を有
する。ここで、各板状部２２ａの研削部２３１には、ダ
イヤモンドや六方晶系の窒化ほう素からなる砥粒が電着
されており、各研削部２３１のうち、その稜線部２３１
ａは加工物に接触してそれを研削可能になっている一
方、各板状部２２ａの間には隙間２３２が形成されてい
る。In this figure, the grinding tool 20 of this example is
A surface grinding grindstone (vertical grinding grindstone) having a shaft, and a shank portion 21, which is a shaft portion held by a chuck (not shown) of a grinding device, and a shank portion 21 on a base end side thereof.
And a grindstone body portion 22 having a larger outer diameter contour than the outer diameter of the shank portion 21. Here, the grindstone body 22 is the central axis L of the grinding tool 20.
It is formed as twelve plate-shaped portions 22a that are formed radially from the 2 (rotation center line) side toward the outer periphery, and by the grinding portion 231 configured by the end surface of each plate-shaped portion 22a,
The tip surface 23 of the grinding tool 20 is in a configured state. Therefore, in the state where the end surface of the plate-shaped portion 22a, that is, a large number of grinding portions 231 are intermittently formed in the circumferential direction of the tip end surface 23, any grinding portion 231 has an inner periphery thereof. Has a ridge line portion 231a (edge portion) extending from the side toward the outer peripheral side. Here, abrasive grains made of diamond or hexagonal boron nitride are electrodeposited on the grinding portion 231 of each plate-shaped portion 22a, and the ridge line portion 231 of each grinding portion 231 is formed.
While a is in contact with a work piece so that it can be ground, a gap 232 is formed between each plate-shaped portion 22a.
【００１８】このような構成の研削工具２０において、
研削工具２０を、その中心軸線Ｌ2を回転中心線として
矢印Ｅの方向に回転させながら、その先端面２３を加工
物Ｗの表面に接触させると、各板状部２２ａの研削部２
３１のうち、その稜線部２３１ａは、そこに固着されて
いる砥粒によって加工物を研削する。ここで、研削工具
２０の研削部２３１の軌跡を図５に示すように、研削工
具２０を、矢印Ｅの方向に回転させながら、一点鎖線Ｘ
で示す基準線から矢印Ｆの方向に送ると、研削工具２０
の回転動作によって、研削部２３１の稜線部２３１ａは
加工物表面を研削しながら移動する。ここで、研削部２
３１の稜線部２３１ａは、先端面２３の内周側から外周
側に向かって形成されているので、研削工具２０の回転
による研削可能な範囲が広く、しかも、研削部２３１は
先端面２３の円周方向に断続的に多数形成されているの
で、その研削効率が高い。また、研削工具２０の送り移
動によって、先端面２３と外周側面部２２３との稜線側
２２３ａによっても、加工物Ｗは研削される。従って、
研削加工が進むにつれて、図６（ａ）に斜線領域で示す
未研削領域３０は、研削工具２０によって研削されて、
図６（ｂ）に示すように、既研削領域３１となり、さら
に、図６（ｃ）に示す状態にまで、既研削領域３１は拡
張されていく。この間、研削加工において発生する加工
熱は切削加工に比較してもとより大きく、また、発生熱
量の大部分は加工物Ｗの側に入るため、加工熱によっ
て、加工物Ｗおよび研削工具２０に熱的な損傷が生じな
いように、研削加工中の加工物Ｗに向けて加工液を供給
するが、本例の研削工具２０においては、砥石本体部２
２は研削工具２０の中心軸線Ｌ2 （回転中心線）の側か
ら外周に向かって放射状に形成された１２の板状部２２
ａとして形成されているため、各板状部２２ａの間に隙
間２３２を有しているので、研削中の加工物Ｗの表面は
開放状態にある。このため、研削工具２０の側方から加
工液を供給しても、加工液は隙間２３２を介して効率よ
く研削部２３１（研削点）に供給されると共に、隙間２
３２を介して効率よく除去されるので、冷却効率が高
い。しかも、研削加工によって生じた切屑は、加工液と
共に効率よく除去されるので、加工精度も高い。また、
研削工具２０の加工物Ｗに対する接触面積（当たり面
積）が狭いため、研削工具２０の先端面２３と加工物Ｗ
との加工抵抗が小さい。従って、振動やビビリなどが発
生しないので、加工精度が高い。さらに、深さ方向の切
込み量を増大させて、加工効率をさらに高めることもで
きる。In the grinding tool 20 having such a structure,
When the tip end surface 23 of the grinding tool 20 is brought into contact with the surface of the workpiece W while rotating the grinding tool 20 in the direction of arrow E with the central axis L 2 as the rotation center line, the grinding portion 2 of each plate-shaped portion 22 a is rotated.
The ridge line portion 231a of 31 grinds the workpiece with the abrasive grains fixed thereto. Here, as shown in FIG. 5, the locus of the grinding portion 231 of the grinding tool 20, while rotating the grinding tool 20 in the direction of the arrow E, the chain line X
When the grinding tool 20 is fed in the direction of arrow F from the reference line indicated by
The ridge line portion 231a of the grinding portion 231 moves while grinding the surface of the workpiece by the rotation operation of. Here, the grinding unit 2
Since the ridge line portion 231a of 31 is formed from the inner peripheral side to the outer peripheral side of the tip surface 23, the grindable range by the rotation of the grinding tool 20 is wide, and the grinding portion 231 is a circle of the tip surface 23. Since many are formed intermittently in the circumferential direction, the grinding efficiency is high. Further, the workpiece W is also ground by the ridge line side 223a of the tip end surface 23 and the outer peripheral side surface portion 223 by the feed movement of the grinding tool 20. Therefore,
As the grinding process proceeds, the unground region 30 shown by the hatched region in FIG. 6A is ground by the grinding tool 20,
As shown in FIG. 6B, the ground area 31 is formed, and the ground area 31 is further expanded to the state shown in FIG. 6C. During this time, the processing heat generated in the grinding process is larger than that in the cutting process, and most of the generated heat amount enters the side of the workpiece W, so the processing heat causes the workpiece W and the grinding tool 20 to be thermally heated. The working fluid is supplied toward the workpiece W during the grinding process so that no serious damage occurs, but in the grinding tool 20 of this example, the grindstone body 2
Reference numeral 2 denotes 12 plate-shaped portions 22 formed radially from the side of the central axis L 2 (rotation center line) of the grinding tool 20 toward the outer periphery.
Since it is formed as a, there is a gap 232 between each plate-like portion 22a, so the surface of the workpiece W being ground is in an open state. Therefore, even if the machining liquid is supplied from the side of the grinding tool 20, the machining liquid is efficiently supplied to the grinding portion 231 (grinding point) through the gap 232 and the gap 2
Since it is efficiently removed via 32, the cooling efficiency is high. Moreover, the chips produced by the grinding process are efficiently removed together with the working liquid, so that the working accuracy is high. Also,
Since the contact area (contact area) of the grinding tool 20 with the workpiece W is small, the tip surface 23 of the grinding tool 20 and the workpiece W are
The machining resistance with is small. Therefore, since vibration and chattering do not occur, the processing accuracy is high. Further, it is possible to further increase the cutting efficiency by increasing the depth of cut.
【００１９】なお、研削部の縁部については、先端面の
中心側から放射状に形成されているものの他に、先端面
の接線方向に対して斜めに形成された構造であってもよ
く、縁部が先端面の内周側から外周側に向かって、すな
わち、半径方向成分をもって形成されていればよい。ま
た、研削部を研削工具の中心軸線側から側方に向かって
放射状に延出する多数の板状部の端面で構成した研削工
具においても、その中心側に加工液供給通路を形成して
もよい。The edge portion of the grinding portion may be formed in a radial shape from the center side of the tip surface, or may be formed obliquely with respect to the tangential direction of the tip surface. It suffices that the portion is formed from the inner peripheral side to the outer peripheral side of the tip surface, that is, with the radial direction component. Further, even in a grinding tool in which the grinding portion is formed by end faces of a large number of plate-shaped portions radially extending from the central axis side of the grinding tool to the side, even if the machining liquid supply passage is formed on the center side. Good.
【００２０】[0020]
【発明の効果】以上のとおり、本発明においては、研削
工具の使用面とされる先端面の円周方向には、その内周
側から外周側に向かう縁部を備える多数の研削部が断続
的に形成されていることに特徴を有するため、以下の効
果を奏する。As described above, according to the present invention, in the circumferential direction of the tip surface, which is the use surface of the grinding tool, a large number of grinding portions having an edge portion extending from the inner peripheral side to the outer peripheral side are intermittently connected. Since it is characteristically formed, it has the following effects.
【００２１】 各研削部の縁部は先端面の内周側から
外周側に向かって形成されているため、研削工具の回転
によって加工物を研削する範囲が広く、しかも、先端面
の円周方向に多数の研削部が形成されているので、加工
物に対する研削効率が高い。Since the edge portion of each grinding portion is formed from the inner peripheral side to the outer peripheral side of the tip end surface, the range in which the workpiece is ground by the rotation of the grinding tool is wide, and moreover, in the circumferential direction of the tip end surface. Since a large number of grinding portions are formed in the workpiece, the grinding efficiency for the workpiece is high.
【００２２】 研削部は断続的に形成されて、それら
の間には隙間が形成されているため、加工液を隙間から
研削点に効率よく供給できると共に、加工液を隙間から
効率よく除去できるので、冷却効率および切屑の除去効
率が高い。Since the grinding portions are formed intermittently and a gap is formed between them, the machining liquid can be efficiently supplied from the gap to the grinding point and the machining liquid can be efficiently removed from the gap. High cooling efficiency and chip removal efficiency.
【００２３】 研削工具の加工物に対する接触面積
（当たり面積）が狭いため、研削工具の先端面と加工物
との加工抵抗が小さい。従って、振動やビビリなどが発
生しないので、加工精度が高い。また、深さ方向の切込
み量を増大させて、加工効率をさらに高めることもでき
る。Since the contact area (contact area) of the grinding tool with the workpiece is small, the processing resistance between the tip surface of the grinding tool and the workpiece is small. Therefore, since vibration and chattering do not occur, the processing accuracy is high. Further, it is possible to further increase the machining efficiency by increasing the depth of cut.
【００２４】 研削工具の内部に加工液供給通路を形
成した場合には、この加工液供給通路を介して、加工液
を加工点に対して直接に供給できるので、冷却効率およ
び切屑の除去効率がさらに向上する。When the machining fluid supply passage is formed inside the grinding tool, the machining fluid can be directly supplied to the machining point through the machining fluid supply passage, so that cooling efficiency and chip removal efficiency are improved. Further improve.
【００２５】 各研削部を多数の板状部の端面で構成
した場合には、研削点に対する加工液の供給およびそこ
からの加工液の除去を効率よく行なえるので、加工液を
加工液供給通路から供給した場合は勿論のこと、加工液
を研削工具の側方から供給した場合でも、冷却効率およ
び切屑の除去効率が高い。When each grinding portion is composed of the end faces of a large number of plate-shaped portions, the machining fluid can be efficiently supplied to and removed from the grinding point, so that the machining fluid is supplied to the machining fluid supply passage. The cooling efficiency and the chip removal efficiency are high not only when supplied from above, but also when the working fluid is supplied from the side of the grinding tool.
【図１】（ａ）は本発明の実施例１に係る研削工具の部
分断面図、（ｂ）はその底面図である。1A is a partial cross-sectional view of a grinding tool according to a first embodiment of the present invention, and FIG. 1B is a bottom view thereof.
【図２】図１に示す研削工具の先端面の一部を拡大して
示す説明図である。FIG. 2 is an enlarged view showing a part of the tip surface of the grinding tool shown in FIG.
【図３】図１に示す研削工具の先端面の一部を拡大して
示す説明図であって、（ａ）は粒径の小さな砥粒を固着
した先端面の説明図、（ｂ）は粒径の大きな砥粒を固着
した先端面の説明図である。3A and 3B are explanatory views showing an enlarged part of the tip surface of the grinding tool shown in FIG. 1, in which FIG. 3A is an illustration of the tip surface to which abrasive grains having a small particle diameter are fixed, and FIG. It is explanatory drawing of the front end surface to which the abrasive grain with large particle diameter was adhered.
【図４】本発明の実施例２に係る研削工具の斜視図であ
る。FIG. 4 is a perspective view of a grinding tool according to a second embodiment of the present invention.
【図５】図４に示す研削工具の研削加工中における研削
部の軌跡を示す説明図である。5 is an explanatory diagram showing a locus of a grinding portion during grinding of the grinding tool shown in FIG.
【図６】（ａ）〜（ｃ）のいずれも、図４に示す研削工
具の研削加工中における動作を示す説明図である。6 (a) to 6 (c) are explanatory views showing the operation of the grinding tool shown in FIG. 4 during grinding.
【図７】従来の研削工具の部分断面図である。FIG. 7 is a partial cross-sectional view of a conventional grinding tool.
【図８】参考例に係る研削工具の部分断面図である。FIG. 8 is a partial cross-sectional view of a grinding tool according to a reference example.
【図９】（ａ）は別の参考例に係る研削工具の部分断面
図、（ｂ）はその底面図である。9A is a partial cross-sectional view of a grinding tool according to another reference example, and FIG. 9B is a bottom view thereof.
１０，２０・・・研削工具 １１，２１・・・シャンク部 １２，２２・・・砥石本体部 １３，２３・・・先端面 １４・・・加工液供給通路 ２２ａ・・板状部 １０１，１０１ａ，１０１ｂ・・・砥粒 １２１・・・凹部 １３１・・・研削部 １３１ａ・・・頂上（縁部） １３２，２３２・・・隙間 １３２ａ・・・谷 ２３１・・・研削部 ２３１ａ・・・稜線部（縁部） Ｗ・・・加工物 10, 20 ... Grinding tool 11, 21 ... Shank portion 12, 22 ... Grindstone main body portion 13, 23 ... Tip surface 14 ... Machining liquid supply passage 22a ... Plate portion 101, 101a , 101b ... Abrasive grains 121 ... Recessed portion 131 ... Grinding portion 131a ... Top (edge portion) 132, 232 ... Gap 132a ... Valley 231 ... Grinding portion 231a ... Ridge line Part (edge) W ... Workpiece
Claims (4)
る先端面側が使用面とされる研削工具であって、前記先
端面の円周方向には、その内周側から外周側に向かう縁
部によって加工物表面を研削可能な多数の研削部が断続
的に形成されていることを特徴とする研削工具。1. A grinding tool in which a base end side is a shank portion, and a tip end surface side including abrasive grains is a use surface, and the tip end surface is circumferentially directed from an inner peripheral side to an outer peripheral side. A grinding tool characterized in that a large number of grinding portions capable of grinding the surface of a workpiece are intermittently formed by edges.
円周方向に向かってうねり形状をもって形成されてお
り、その頂上側で前記研削部が構成されていることを特
徴とする研削工具。2. The grinding tool according to claim 1, wherein the tip end surface is formed in a undulating shape in the circumferential direction, and the grinding portion is formed on the top side thereof.
工具の中心軸線側から側方に向かって放射状に延出する
多数の板状部の端面で形成されており、これらの各端面
で前記研削部が構成されていることを特徴とする研削工
具。3. The end surface of claim 1, wherein the tip end surface is formed by end surfaces of a large number of plate-shaped portions that extend radially from the central axis side of the grinding tool toward the side. A grinding tool, wherein the grinding part is configured.
工具の内部には、その基端側端面から前記先端面にまで
貫通する加工液供給通路が形成されていることを特徴と
する研削工具。4. The grinding tool according to claim 2 or 3, wherein a machining liquid supply passage is formed inside the grinding tool to penetrate from the base end side end surface to the tip end surface. tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9060592A JPH05285852A (en) | 1992-04-10 | 1992-04-10 | Grinding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9060592A JPH05285852A (en) | 1992-04-10 | 1992-04-10 | Grinding tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05285852A true JPH05285852A (en) | 1993-11-02 |
Family
ID=14003112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9060592A Pending JPH05285852A (en) | 1992-04-10 | 1992-04-10 | Grinding tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05285852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022076183A (en) * | 2020-11-09 | 2022-05-19 | 株式会社ナノテム | Tool, diameter adjustment method, and drill |
-
1992
- 1992-04-10 JP JP9060592A patent/JPH05285852A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022076183A (en) * | 2020-11-09 | 2022-05-19 | 株式会社ナノテム | Tool, diameter adjustment method, and drill |
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