JPS59214510A - Ball end mill - Google Patents

Ball end mill

Info

Publication number
JPS59214510A
JPS59214510A JP8805983A JP8805983A JPS59214510A JP S59214510 A JPS59214510 A JP S59214510A JP 8805983 A JP8805983 A JP 8805983A JP 8805983 A JP8805983 A JP 8805983A JP S59214510 A JPS59214510 A JP S59214510A
Authority
JP
Japan
Prior art keywords
cutting edge
tip
cutting
center
pressure phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8805983A
Other languages
Japanese (ja)
Other versions
JPH0314564B2 (en
Inventor
Mamoru Ichikawa
市川　護
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tungaloy Corp
Original Assignee
Toshiba Tungaloy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Tungaloy Co Ltd filed Critical Toshiba Tungaloy Co Ltd
Priority to JP8805983A priority Critical patent/JPS59214510A/en
Publication of JPS59214510A publication Critical patent/JPS59214510A/en
Publication of JPH0314564B2 publication Critical patent/JPH0314564B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B23C5/1009—Ball nose end mills
    • B23C5/1018—Ball nose end mills with permanently fixed cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2226/00—Materials of tools or workpieces not comprising a metal
    • B23C2226/12—Boron nitride
    • B23C2226/125—Boron nitride cubic [CBN]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2226/00—Materials of tools or workpieces not comprising a metal
    • B23C2226/31—Diamond

Abstract

PURPOSE:To make it possible to perform high speed cutting and as well the cutting of ultra-hard materials, by constituting a main chip with a rod-like center side chip made of a high-pressure phase sintered member and having a substantially quarter circle cross sectioned shape, and an outer peripheral side chip which is made by sintering and securing a cutting knife layer formed of high-pressure phase sintered member on an ultra-hard alloy substrate. CONSTITUTION:A main cutting knife chip 4 is formed of a rod-like center side chip made of a high-pressure phase sintered material of cubic boron nitride, diamond or the like and having a substantially quarter circle cross-sectioned shape, and an outer peripheral side chip 6 which is made by sintering and securing a cutting knife layer 12 made of a high-pressure phase sintered material, on a substrate 10 made of, for example, ultra-hard alloy. In this case, the cutting face 9 of the center side chip 5 is formed as an arcuated surface or a plurality of stepped surfaces, and the planar cutting face 10 of the outer peripheral side chip 6 is made continuous to the cutting surface 9. With this arrangement, high speed cutting and as well the cutting of ultrahard materials may be made.

Description

【発明の詳細な説明】 本発明は、ボールエンドミルに係り、特に立方晶窒化硼
素、ダイヤモンド等の高圧相焼結体を備えるようにした
切刃、チップが合理的に取付けられることにより、切削
性能の向上を図ったものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball end mill, and in particular, the cutting performance is improved by rationally mounting cutting blades and chips equipped with high-pressure phase sintered bodies such as cubic boron nitride and diamond. The aim is to improve the

従来、この種のボールエンドミルとしては、例えば、実
公昭５３−４０７９４号公報等にみられるものが開示さ
れている。そして、これらのボールエンドミルは、切刃
の配置、形状、チップポケットの形状等から優れた切削
性能を示している。Conventionally, this type of ball end mill has been disclosed, for example, in Japanese Utility Model Publication No. 53-40794. These ball end mills exhibit excellent cutting performance due to the arrangement and shape of the cutting blade, the shape of the chip pocket, etc.

しかしながら、熱処理後の型材の修正については、高硬
度であるため研削仕上げにより行なっているのが現状で
ある。したがって、この研削仕−Ｌげに変って切削で充
分対処できるようにしたボールエンドミルの開発が要求
されている。However, the modification of the mold material after heat treatment is currently carried out by grinding because of its high hardness. Therefore, there is a demand for the development of a ball end mill that can sufficiently handle the grinding process by cutting.

本発明は上述の点に鑑みなされたもので、立方晶窒化硼
素、ダイヤモンド等の高圧相焼結体を備えた切刃チップ
が、工具本体に合理的に取付けられるようにして、高速
切削および高硬度材料に対する切削を可能にしたもので
ある。The present invention has been made in view of the above-mentioned points, and enables a cutting tip equipped with a high-pressure phase sintered body such as cubic boron nitride or diamond to be rationally attached to a tool body, thereby achieving high-speed cutting and high-speed cutting. This enables cutting of hard materials.

′以下本発明ボールエンドミルの一実施例について、図
を参照しながら説明する。'Hereinafter, one embodiment of the ball end mill of the present invention will be described with reference to the drawings.

第１図および第２図において、（１）は円柱状をなす工
具本体であり、その先端にはフルート溝（２）が設けら
れ、このフルート溝（２）に凹設されたチップ座（３）
内には、主切刃チップ（４）が例えばろう付けによって
取付けられている。In FIGS. 1 and 2, (1) is a cylindrical tool body, the tip of which is provided with a flute groove (2), and a chip seat (3) recessed in the flute groove (2). )
Inside, the main cutting tip (4) is attached, for example by brazing.

この主切刃チップ（４）は、中心側チップ（５）および
外周側チップ（６）から構成されるもので、円弧状の切
刃稜（７）アよび外周側の切刃稜（８）が連続すること
により、型材切削等に適用できるようになっているもの
である。また、円弧状の切刃稜（７）は、その始端が回
転中心又はその付近から始まるものである。This main cutting edge tip (4) is composed of a center tip (5) and an outer tip (6), and has an arc-shaped cutting edge (7) and an outer cutting edge (8). The continuous structure allows it to be applied to cutting of profile materials, etc. Further, the starting end of the arc-shaped cutting edge (7) starts at or near the center of rotation.

そして、前記中心側チップ（５）は、略１／４円状の断
面を有する棒状で、立方晶窒化硼素、ダイヤモンド等の
高圧相焼結体からなり、そのろう付けに際しては、ろう
付は性のある金属をコーティングすることにより、回転
中心部分にろう付けされる。この場合中心側チップ（５
）によって形成されるすくい面（９）は、第３図でみら
れる円弧面又は第４図でみられるようなθｌ〜θ４の角
度をもつ複数段面を呈するものである。このすくい面（
９）に対しては、前記夕１周側チップ（６）の平面的な
すくい面（ｌ（１が連続する。この外周側チップ（６）
は、超硬合金、高速度山等の基台（ｔｌ）上に立方晶窒
化硼素、ダイヤモンド等の高圧相焼結体からなる切刃層
Ｑ２が高温高圧条件下で焼結固着されるものである。そ
して、この高圧相焼結体は、立方晶窒化硼素、ダイヤモ
ンド等が単味のほかに、金属、炭化物などからなる結合
材を含有する場合があり、切削条件によってこれから適
宜選択される。The center tip (5) is rod-shaped with a cross section of approximately 1/4 circle, and is made of a high-pressure phase sintered body such as cubic boron nitride or diamond. The center of rotation is brazed by coating it with a certain metal. In this case, the center side chip (5
The rake face (9) formed by ) is an arcuate surface as seen in FIG. 3 or a multi-step surface having an angle of θ1 to θ4 as seen in FIG. 4. This rake face (
9), the planar rake face (l (1 is continuous) of the tip (6) on the first circumference side.
A cutting edge layer Q2 made of a high-pressure phase sintered body of cubic boron nitride, diamond, etc. is sintered and fixed under high-temperature and high-pressure conditions on a base (tl) of cemented carbide, high-speed mountain, etc. be. The high-pressure phase sintered body may contain not only cubic boron nitride, diamond, etc., but also a binder made of metal, carbide, etc., which is appropriately selected depending on the cutting conditions.

このようにして構成されたボールエンドミルは、切刃稜
（力（８）により切削が行なわれ、フルート溝（２）に
よって形成される切屑ポケットから切屑が排出される。In the thus constructed ball end mill, cutting is performed by the cutting edge (force (8)), and chips are discharged from the chip pocket formed by the flute groove (2).

この場合、中心側チップ（５）に形成される切刃稜（力
は、特に回転方向において、凸曲線を呈することから重
切削に耐え、有効な切削作用をなすものである。In this case, the cutting edge (force) formed on the center tip (5) exhibits a convex curve, especially in the direction of rotation, so it can withstand heavy cutting and performs an effective cutting action.

さらに、第５図および第６図に示されるものは、前記主
切刃チップ（５）のほかに、副切刃チップ（１９を設け
たものであり特に、切削の安定性から切削振動の減少を
図ったものである。Furthermore, the one shown in FIGS. 5 and 6 is provided with a sub-cutting tip (19) in addition to the main cutting tip (5), and is particularly designed to reduce cutting vibration from the viewpoint of cutting stability. The aim is to

前記副切刃チップ（６）は、主切刃チップ（５）の外周
側チップ（６）と同じく超硬合金、高速度鋼等の基台（
ｔ６）上に高圧相焼結体からなる切刃層θのを焼結固着
したもので、その円弧切刃稜（７）が回転中心部分を除
いた途中から外周側に向って伸びるものである。The auxiliary cutting edge tip (6) is made of a base (made of cemented carbide, high speed steel, etc.) like the outer peripheral tip (6) of the main cutting edge tip (5).
t6) A cutting edge layer θ made of a high-pressure phase sintered body is sintered and fixed on top, and the arcuate cutting edge ridge (7) extends toward the outer circumference from the middle excluding the rotation center portion. .

この場合、副切刃チップ←９の中心側端縁は、切削機能
上の理由から、その回転軌跡上で、主切刃チップ（４）
の中心側チップ（５）および外周側チップ（６）の継目
部分に重ならないことが好ましい。In this case, for reasons of cutting function, the center side edge of the minor cutting edge tip ←9 is located on the main cutting edge tip (4) on its rotation trajectory.
It is preferable that the joint between the center tip (5) and the outer tip (6) does not overlap.

なお、本実施例では、主切刃チップ（４）および副切刃
チップ（１９が、ろう付けにより取付けられるようにし
ているが、これに限らず押え金等によるクランプ方式に
してもよいものである。In addition, in this embodiment, the main cutting edge tip (4) and the auxiliary cutting edge tip (19) are attached by brazing, but the present invention is not limited to this, and a clamping method using a presser foot or the like may be used. be.

本発明は、以上説明したように主切刃チップについては
、中心側チップおよび外周側チップに分けて合理的な切
刃構成となるようにするとともに、その切刃層として高
圧相焼結体を利用したものであるから、特に、高硬度材
料の切削や、高速度切削などの仕ヒげ切削に好適するも
のである。As explained above, the main cutting edge tip of the present invention is divided into a center tip and an outer peripheral tip to have a rational cutting edge configuration, and a high pressure phase sintered body is used as the cutting edge layer. Since it is used in the cutting process, it is particularly suitable for cutting high-hardness materials and cutting edges such as high-speed cutting.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明ボールエンドミルの一実施列を示す正面
図、第２図は、その下面図、第３図は、第１図中のｍ−
ｍａに沿って得られる一部拡大断面図、第４図は変形例
を示す一部拡大断面図、第５図は、第２の発明に基づく
一実施例を示す正面図、第６図は、その下面図である。FIG. 1 is a front view showing one row of ball end mills according to the present invention, FIG. 2 is a bottom view thereof, and FIG.
Fig. 4 is a partially enlarged sectional view showing a modified example, Fig. 5 is a front view showing an embodiment based on the second invention, and Fig. 6 is a partially enlarged sectional view taken along ma. It is a bottom view.

Claims (2)

【特許請求の範囲】[Claims] （１）円柱状をなす工具本体の先端には円弧状をなす切
刃稜の始端が、回転中心又はその付近から始まって、工
具本体の外周側に向って外周切刃稜として伸びるように
した主切刃チップを設けるようにしたボー））／’ｙ−
ダエンドミルにおいて、前記主切刃チップはその回転中
心部分では、略１／４円状の断面を有する棒状の立方晶
窒化硼素、ダイヤモンド等の高圧相焼結体からなる中心
側チップが位置することにより、円弧面又は複数段面を
呈するすくい面を形成し、残りの外周側部分では超硬合
金等の基台」二に前記高圧相焼結体からなる切刃層を焼
結固着した外周側チップが、位置することにより、この
切刃層のすくい面を円弧面又は複数段面を呈する前記す
くい面に連続させていることを特徴とするボールエンド
ミル。(1) At the tip of the cylindrical tool body, the starting end of the arc-shaped cutting edge starts at or near the center of rotation and extends toward the outer periphery of the tool body as an outer peripheral cutting edge ridge. Bow with a main cutting edge))/'y-
In the end mill, the main cutting edge tip has a central tip made of a rod-shaped high-pressure phase sintered body of cubic boron nitride, diamond, etc. having an approximately 1/4 circular cross section located at its center of rotation. A rake face exhibiting an arcuate surface or a plurality of stepped surfaces is formed, and the remaining outer peripheral portion is made of a base made of cemented carbide or the like. A ball end mill characterized in that the tip is positioned so that the rake face of the cutting edge layer is continuous with the rake face exhibiting an arcuate surface or a plurality of stepped surfaces. （２）円柱状をなす工具本体の先端には、円弧状をなす
切刃稜の始端が、回転中心又はその付近がら始まって、
工具本体の外周側に向って外周切刃稜として伸びるよう
にした主切刃チップおよび円弧切刃稜が回転中心部分を
除いた途中から外周側に向って伸びるようにした副切刃
グーツブをそれぞれ設けるようにしたボールエンドミル
において、前記主切刃チップは、その回転中心部分では
、略１／４円状の断面を有する棒状の立方晶窒化硼素、
ダイヤモンド等の高圧相焼結体からなる中心側チップが
位置することにより、円弧面又は複数段面を呈するすく
い面を形成し、残りの外周側部分では、超硬合金等の基
台上に前記高圧相焼結体からなる切刃層を焼結固着した
外周側チップが位置することにより、この切刃層のすく
い面を円弧面又は複数段面を呈する前記すくい面に連続
させてカリ、 前記副切刃チップは、超硬合金等の基台上に高圧相焼結
体からなる切刃層を焼結固着したものからなり、この切
刃層が前記主切刃チップの切刃層に対応するようにすく
い面を形成していることを特徴とするボールエンドミル
。(2) At the tip of the cylindrical tool body, the starting end of the arc-shaped cutting edge starts at or near the center of rotation,
A main cutting edge tip that extends as an outer cutting edge ridge toward the outer periphery of the tool body, and a secondary cutting edge tip that has an arcuate cutting edge ridge extending toward the outer periphery from the middle excluding the center of rotation. In the ball end mill, the main cutting edge tip includes, at its center of rotation, a rod-shaped cubic boron nitride having an approximately 1/4 circular cross section;
By positioning the center tip made of a high-pressure phase sintered body such as diamond, a rake surface exhibiting a circular arc surface or a multi-step surface is formed, and the remaining outer peripheral portion is placed on a base made of cemented carbide or the like. By positioning the outer peripheral tip in which a cutting edge layer made of a high-pressure phase sintered body is sintered and fixed, the rake face of this cutting edge layer is continuous with the rake face exhibiting an arcuate surface or a plurality of stepped surfaces. The auxiliary cutting edge tip consists of a cutting edge layer made of a high-pressure phase sintered body sintered and fixed on a base of cemented carbide, etc., and this cutting edge layer corresponds to the cutting edge layer of the main cutting edge tip. A ball end mill characterized by having a rake face formed so as to
JP8805983A 1983-05-19 1983-05-19 Ball end mill Granted JPS59214510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8805983A JPS59214510A (en) 1983-05-19 1983-05-19 Ball end mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8805983A JPS59214510A (en) 1983-05-19 1983-05-19 Ball end mill

Publications (2)

Publication Number Publication Date
JPS59214510A true JPS59214510A (en) 1984-12-04
JPH0314564B2 JPH0314564B2 (en) 1991-02-27

Family

ID=13932269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8805983A Granted JPS59214510A (en) 1983-05-19 1983-05-19 Ball end mill

Country Status (1)

Country Link
JP (1) JPS59214510A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6426113U (en) * 1987-08-05 1989-02-14
JPH0393013U (en) * 1990-01-11 1991-09-24
EP0514894A2 (en) * 1991-05-22 1992-11-25 Mitsubishi Materials Corporation Ball end mill
WO1994023873A1 (en) * 1993-04-16 1994-10-27 Widia Heinlein Gmbh Cutting tool
FR2704792A1 (en) * 1993-05-03 1994-11-10 Belin Sa Yvon High speed finishing cutter.
FR2705264A1 (en) * 1993-05-17 1994-11-25 Aob Improvement to shaped throw-away tool tips
EP1201410A2 (en) * 2000-10-31 2002-05-02 Eastman Kodak Company Apparatus for forming a microlens array mold
EP1201409A2 (en) * 2000-10-31 2002-05-02 Eastman Kodak Company Apparatus for forming a microlens mold
JP2002192568A (en) * 2000-10-31 2002-07-10 Eastman Kodak Co Method for manufacturing microlens, and microlens array

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6426113U (en) * 1987-08-05 1989-02-14
JPH0393013U (en) * 1990-01-11 1991-09-24
EP0514894A2 (en) * 1991-05-22 1992-11-25 Mitsubishi Materials Corporation Ball end mill
US5188487A (en) * 1991-05-22 1993-02-23 Mitsubishi Materials Corporation Ball end mill
WO1994023873A1 (en) * 1993-04-16 1994-10-27 Widia Heinlein Gmbh Cutting tool
US5632576A (en) * 1993-04-16 1997-05-27 Widia Heinlein Gmbh Cutting plate for a ball head miller
EP0625398A1 (en) * 1993-05-03 1994-11-23 Yvon Belin S.A. Precision milling cutter for high speed
FR2704792A1 (en) * 1993-05-03 1994-11-10 Belin Sa Yvon High speed finishing cutter.
FR2705264A1 (en) * 1993-05-17 1994-11-25 Aob Improvement to shaped throw-away tool tips
EP1201410A2 (en) * 2000-10-31 2002-05-02 Eastman Kodak Company Apparatus for forming a microlens array mold
EP1201409A2 (en) * 2000-10-31 2002-05-02 Eastman Kodak Company Apparatus for forming a microlens mold
JP2002192568A (en) * 2000-10-31 2002-07-10 Eastman Kodak Co Method for manufacturing microlens, and microlens array
EP1201409A3 (en) * 2000-10-31 2004-01-07 Eastman Kodak Company Apparatus for forming a microlens mold
EP1201410A3 (en) * 2000-10-31 2004-01-07 Eastman Kodak Company Apparatus for forming a microlens array mold

Also Published As

Publication number Publication date
JPH0314564B2 (en) 1991-02-27

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