JPH11347824A - Ball end mill - Google Patents

Ball end mill

Info

Publication number
JPH11347824A
JPH11347824A JP10157698A JP15769898A JPH11347824A JP H11347824 A JPH11347824 A JP H11347824A JP 10157698 A JP10157698 A JP 10157698A JP 15769898 A JP15769898 A JP 15769898A JP H11347824 A JPH11347824 A JP H11347824A
Authority
JP
Japan
Prior art keywords
end mill
ball end
sintered body
ball
tip
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
JP10157698A
Other languages
Japanese (ja)
Other versions
JP4560687B2 (en
Inventor
Takayuki Nishimura
隆侑 西村
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.)
GN TOOL KK
Original Assignee
GN TOOL KK
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 GN TOOL KK filed Critical GN TOOL KK
Priority to JP15769898A priority Critical patent/JP4560687B2/en
Publication of JPH11347824A publication Critical patent/JPH11347824A/en
Application granted granted Critical
Publication of JP4560687B2 publication Critical patent/JP4560687B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Abstract

PROBLEM TO BE SOLVED: To provide a ball end mill manufactured easily, regardless of the size of the radius of a tool tip part in which the ball edge is formed, in which a sintered compact with high hardness and high wear resistance in which a ball edge is formed is not removed from a mother material. SOLUTION: In a ball end mill manufactured from a blank material composed by that a sintered compact with high hardness and high wear resistance with nearly certain thin layer thickness is integrally sintered and stuck to a hemisphere part (or a hemisphere part and short columnar part connecting thereto) formed on the tip of a columnar cemented carbide made mother material 1, a land part 14 and groove part 15 are formed alternately in a periphery direction on the tip part in which at least the sintered compact with high hardness and high wear resistance of the blank material is positioned and also the ball edge 10a is formed on the sintered compact with high hardness and high wear resistance left on the land part.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】
この発明は、難切削材、高硬度焼入鋼、グラファイト材
等を加工するためボールエンドミルに関するものであ
る。TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ball end mill for processing hard-to-cut materials, hardened steel, graphite materials, and the like.

【０００２】[0002]

【従来の技術】近年、ボール刃をダイヤモンド焼結体又
は立方晶窒化硼素焼結体（高硬度・高耐摩耗性焼結体）
により形成したボールエンドミルが開発されている。2. Description of the Related Art In recent years, a ball blade is used for a diamond sintered body or a cubic boron nitride sintered body (high hardness and high wear resistant sintered body).
Has been developed.

【０００３】上記ボールエンドミルとしては、例えば、
図８や図９に示すように、平板状の高硬度・高耐摩耗性
焼結体から成る切刃体80を、超硬合金製母材８の先端半
球部の座面にロー付けして成るものがある。しかしなが
ら、このエンドミルでは、切刃体80の超硬合金製母材８
への貼り付け面積が小さいことから、ロー付けによる接
着力不足や切削熱によって短期間でボール刃となる切刃
体80が超硬合金製母材８から外れてしまうという問題が
ある。As the ball end mill, for example,
As shown in FIGS. 8 and 9, a cutting blade 80 made of a plate-shaped sintered body having high hardness and high wear resistance is soldered to the bearing surface of the tip hemisphere of the cemented carbide base material 8. There is something that consists. However, in this end mill, the cemented carbide base material 8
Due to the small area to be attached to the base material, there is a problem that the cutting blade body 80 serving as a ball blade comes off from the cemented carbide base material 8 in a short time due to insufficient bonding force due to brazing or cutting heat.

【０００４】また、他のエンドミルとしては、超硬合金
製母材の先端半球状面に形成した細い凹溝に高硬度・高
耐摩耗性焼結体用の原料粉末を充填・埋設すると共にこ
れらを一体焼結固着し、前記原料粉末から成る高硬度・
高耐摩耗性焼結体に切刃を形成して成るものがある。し
かしながら、このエンドミルでは、ボール刃が形成され
る部分の径が小さい場合には高硬度・高耐摩耗性焼結体
用の原料粉末を充填・埋設するための極細の凹溝の加工
が非常に困難であり、製造が不可能である。Further, as another end mill, a raw material powder for a sintered body having high hardness and high wear resistance is filled and buried in a thin groove formed in a hemispherical surface of a tip end of a cemented carbide base material. Are sintered and fixed, and a high hardness
2. Description of the Related Art There is a high wear resistant sintered body formed by forming a cutting blade. However, in this end mill, when the diameter of the portion where the ball blade is formed is small, the processing of an extremely fine concave groove for filling and embedding the raw material powder for a high hardness and high wear resistance sintered body is extremely difficult. Difficult and impossible to manufacture.

【０００５】[0005]

【発明が解決しようとする課題】そこで、この発明で
は、ボール刃が形成された高硬度・高耐摩耗性焼結体
が母材から外れず、ボール刃が形成される工具先端部
分の半径の大小にかかわらず容易に製造できるボールエ
ンドミルを提供することを課題とする。Therefore, in the present invention, the high hardness and high wear resistant sintered body having the ball blade formed thereon does not come off the base material, and the radius of the tool tip where the ball blade is formed is reduced. It is an object to provide a ball end mill that can be easily manufactured regardless of the size.

【０００６】[0006]

【課題を解決する為の手段】（請求項１記載の発明）請
求項１記載の発明のボールエンドミルは、円柱状の超硬
合金製母材の先端に形成した半球状部に、略一定の薄い
層厚で高硬度・高耐摩耗性焼結体が一体焼結固着されて
成るブランク材から製造されるボールエンドミルであっ
て、前記ブランク材の少なくとも高硬度・高耐摩耗性焼
結体が位置する先端部分にランド部と溝部を周方向に交
互に形成すると共にランド部に残存した高硬度・高耐摩
耗性焼結体部分にボール刃を形成してある。 （請求項２記載の発明）請求項２記載の発明のボールエ
ンドミルは、円柱状の超硬合金製母材の先端に形成した
半球状部とこれに連続する短い円柱状部に、略一定の薄
い層厚で高硬度・高耐摩耗性焼結体が一体焼結固着され
て成るブランク材から製造されるボールエンドミルであ
って、前記ブランク材の少なくとも高硬度・高耐摩耗性
焼結体が位置する先端部分にランド部と溝部を周方向に
交互に形成すると共に前記ランド部に残存した高硬度・
高耐摩耗性焼結体部分にボール刃を形成してある。 （請求項３記載の発明）請求項３記載の発明のボールエ
ンドミルは、上記請求項１記載の発明に関して、半球状
部は、超硬合金製母材の先端を段付けして少し小さくし
た部分に形成されている。 （請求項４記載の発明）請求項４記載の発明のボールエ
ンドミルは、上記請求項２記載の発明に関して、半球状
部とこれに連続する短い円柱状部分は、超硬合金製母材
の先端を段付けして少し小さくした部分に形成されてい
る。 （請求項５記載の発明）請求項５記載の発明のボールエ
ンドミルは、上記請求項１乃至４のいずれかに記載の発
明に関して、高硬度・高耐摩耗性焼結体は、多結晶ダイ
ヤモンド又は立方晶窒化硼素を主体とする硬質粒子又は
粉体を焼結したものである。 （請求項６記載の発明）請求項６記載の発明のボールエ
ンドミルは、上記請求項１乃至５のいずれかに記載の発
明に関して、高硬度・高耐摩耗性焼結体は、０．５〜１
ｍｍの厚さとしてある。Means for Solving the Problems (Invention of claim 1) The ball end mill of the invention according to claim 1 has a substantially fixed semi-spherical portion formed at the tip of a columnar cemented carbide base material. A ball end mill manufactured from a blank material in which a thin layer having a high hardness and high wear resistance sintered body is integrally sintered and fixed, wherein at least the high hardness and high wear resistance sintered body of the blank material is used. Land portions and groove portions are alternately formed in the circumferential direction at the tip end portion, and a ball blade is formed at the high hardness and high wear resistant sintered body portion remaining at the land portion. (Invention of Claim 2) The ball end mill according to the invention of Claim 2 is characterized in that a semi-spherical portion formed at the tip of a columnar cemented carbide base material and a short columnar portion continuous with the semi-spherical portion are substantially constant. A ball end mill manufactured from a blank material in which a thin layer having a high hardness and high wear resistance sintered body is integrally sintered and fixed, wherein at least the high hardness and high wear resistance sintered body of the blank material is used. Land portions and grooves are alternately formed in the circumferential direction at the tip portion located, and high hardness remaining on the land portions is obtained.
A ball blade is formed on the high wear resistant sintered body. According to a third aspect of the present invention, there is provided a ball end mill according to the first aspect of the present invention, wherein the semi-spherical portion is formed by stepping the tip of a cemented carbide base material and making it slightly smaller. Is formed. According to a fourth aspect of the present invention, in the ball end mill according to the second aspect of the present invention, the hemispherical portion and the short columnar portion continuous with the hemispherical portion are formed at the tip of a cemented carbide base material. Is formed in a slightly reduced portion by stepping. (Invention according to claim 5) The ball end mill according to the invention according to the invention according to any one of claims 1 to 4, wherein the sintered body having high hardness and high wear resistance is made of polycrystalline diamond or It is obtained by sintering hard particles or powder mainly composed of cubic boron nitride. (Invention according to claim 6) The ball end mill according to claim 6 is a ball end mill according to any one of claims 1 to 5, wherein the sintered body having high hardness and high wear resistance has a hardness of 0.5 to 0.5 mm. 1
mm.

【０００７】これらの発明のボールエンドミルは上記の
ような構成としてあるから以下の作用・効果を奏する。 ボール刃が形成される高硬度・高耐摩耗性焼結体部分
は、超硬合金製母材と一体焼結固着して構成されている
から、ボール刃が超硬合金製母材から外れるようなこと
はない。 ブランク材の少なくとも高硬度・高耐摩耗性焼結体が
位置する先端部分にランド部と溝部を周方向に交互に形
成すると共にランド部に残存した高硬度・高耐摩耗性焼
結体部分にボール刃を形成して製造されるものであるか
ら、ボール刃が形成される工具先端部分の半径の大小に
かかわらず容易に製造できる。何故ならば、このボール
エンドミルでは、高硬度・高耐摩耗性焼結体用の原料粉
末を充填・埋設するために必要となる、加工が非常に困
難な極細の凹溝を形成する必要がないからである。[0007] The ball end mills of these inventions have the above-described configuration, and thus have the following operations and effects. Since the high hardness and high wear resistant sintered body part on which the ball blade is formed is integrally sintered and fixed with the cemented carbide base material, the ball blade is detached from the cemented carbide base material. There is nothing. Lands and grooves are alternately formed in the circumferential direction at least at the tip of the blank where the high hardness and high wear resistant sintered body is located, and the high hardness and high wear resistant sintered body remaining on the land Since it is manufactured by forming a ball blade, it can be easily manufactured irrespective of the radius of the tool tip portion where the ball blade is formed. Because, in this ball end mill, it is not necessary to form an extremely fine concave groove which is extremely difficult to process, which is necessary for filling and embedding a raw material powder for a high hardness and high wear resistance sintered body. Because.

【０００８】[0008]

【発明の実施の形態】以下、この発明の実施形態におけ
るボールエンドミルについて図面を用いながら詳細に説
明する。 〔実施形態１について〕図１や図２は、この発明の実施
形態のボールエンドミルの正面と側面を示すものであ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a ball end mill according to an embodiment of the present invention will be described in detail with reference to the drawings. [Embodiment 1] FIGS. 1 and 2 show the front and side views of a ball end mill according to an embodiment of the present invention.

【０００９】このボールエンドミルは、図１に示すよう
に、刃部１とこれの一端に接合したシャンク部２とから
構成されている。As shown in FIG. 1, the ball end mill comprises a blade 1 and a shank 2 joined to one end of the blade.

【００１０】刃部１は、図１や図２に示すように、二本
の溝部15と二つのランド部14とが交互に配置される構成
としてあると共にその先端部をボール部10としてあり、
前記ボール部10は、同図に示すように、ランド部14の回
転方向先端側に一体焼結固着されているダイヤモンド焼
結体より成るボール刃10ａを有するものとしてある。As shown in FIGS. 1 and 2, the blade 1 has a configuration in which two grooves 15 and two lands 14 are alternately arranged, and has a tip portion as a ball portion 10.
As shown in the figure, the ball portion 10 has a ball blade 10a made of a diamond sintered body that is integrally sintered and fixed to the tip of the land portion 14 in the rotation direction.

【００１１】ここで、上記構成のボールエンドミルの製
造方法について図１〜図７に基づいて説明する。第１工程 先ず、刃部１となる円柱状の超硬合金製母材の先端面
に、これの半径より１ｍｍ程度小さい半径の半球状部11
ａとこれに連続する短い円柱状部分11ｂを形成する。 第２工程 半球状部11ａと円柱状部分11ｂに約１ｍｍの層厚でダイ
ヤモンドを主体とする硬質粒子（又は粉体）を充填し、
カプセルに詰めて５万気圧、１４５０℃の条件で一体焼
結固着し、図４や図５に示すようなブランク材Ｂを製作
する。なお、図中、符号３はダイヤモンド焼結体であ
る。第３工程 第２工程で製作したブランク材Ｂとほぼ同径の円柱状の
シャンク２とをロー付けして、図６や図７に示すボール
エンドミルの半完成品を製作する。第４工程 上記したボールエンドミルの半完成品を工具研削盤等に
取り付け、ダイヤモンド砥石により二本の溝部15及びラ
ンド部14を研削加工すると共にランド部14の回転方向先
端側に一体焼結固着されているダイヤモンド焼結体３に
ボール刃10ａを研削加工する。これにより図１や図２に
示すボールエンドミルは完成する。Here, the ball end mill having the above configuration is manufactured.
The manufacturing method will be described with reference to FIGS.First step First, the tip surface of a columnar cemented carbide base material to be the blade portion 1
A hemispherical part 11 having a radius smaller by about 1 mm than this radius.
a and a short columnar portion 11b continuous therewith. Second step Die the hemispherical part 11a and cylindrical part 11b with a layer thickness of about 1mm.
Filled with hard particles (or powder) mainly composed of almonds,
Packed in capsules and baked at 50,000 atm, 1450 ° C
Bonded and fixed to produce blank material B as shown in Figs. 4 and 5
I do. In the figure, reference numeral 3 denotes a diamond sintered body.
You.Third step A cylindrical material having almost the same diameter as the blank material B manufactured in the second step
With the shank 2 brazed, the ball shown in FIGS.
Produce semi-finished end mills.4th process The semi-finished ball end mill described above is used for tool grinders, etc.
Mounting, two grooves 15 and
Grinding the land part 14 and rotating the land part 14 in the rotation direction.
The diamond sintered body 3 which is integrally sintered and fixed to the end side
The ball blade 10a is ground. As a result, FIG. 1 and FIG.
The ball end mill shown is completed.

【００１２】なお、ダイヤモンド焼結体３に関して、溝
部15やランド部14の荒加工は放電加工を採用する方が能
率を上げることができる。 〔他の実施形態について〕上記実施形態におけるダイヤ
モンド焼結体を、立方晶窒化硼素焼結体にかえることが
できる。In the case of the diamond sintered body 3, the efficiency of rough machining of the grooves 15 and the lands 14 can be improved by employing electric discharge machining. [Other Embodiments] The diamond sintered body in the above embodiment can be changed to a cubic boron nitride sintered body.

【００１３】また、上記実施形態では溝入れ加工に関し
てねじれ溝としてあるが、直刃溝とするようにしてもよ
い。そして、溝の数の変更は自由であり、溝の長さは少
なくともダイヤモンド焼結体や立方晶窒化硼素焼結体の
全長に形成されていればよい。In the above-described embodiment, the grooving process is a twist groove, but may be a straight blade groove. The number of grooves may be freely changed, and the length of the grooves may be at least formed over the entire length of the diamond sintered body or the cubic boron nitride sintered body.

【００１４】さらに、上記実施形態では、ストレート型
のボールエンドミルにこの発明を施しているが、テーパ
型のボールエンドミルにこの発明を施すようにしてもよ
い。Further, in the above embodiment, the present invention is applied to a straight ball end mill, but the present invention may be applied to a tapered ball end mill.

【００１５】そして、上記実施形態では、刃部となる円
柱状の超硬合金製母材の先端面に半球状部11ａとこれに
連続する短い円柱状部11ｂを設けたが、これに限定され
ることなく、半球状部11ａのみを超硬合金製母材の先端
面に設けるようにしてもよい。In the above embodiment, the hemispherical portion 11a and the short columnar portion 11b continuous with the hemispherical portion 11a are provided on the tip end surface of the columnar cemented carbide base material serving as the blade portion. However, the present invention is not limited to this. Instead, only the hemispherical portion 11a may be provided on the tip end surface of the cemented carbide base material.

【００１６】また、上記実施形態では、半球状部11ａと
円柱状部分11ｂの外周面部に充填されるダイヤモンドや
立方晶窒化硼素を主体とする硬質粒子（又は粉体）の層
厚を約１ｍｍとしてあるが、０．３〜１．５ｍｍ（好ま
しくは０．５〜１ｍｍ）程度の範囲であればよい。この
場合、刃部１となる円柱状の超硬合金製母材の先端面
に、これの半径より０．３〜１．５ｍｍ程度小さい半径
の半球状部11ａとこれに連続する短い円柱状部分11ｂを
形成すればよい。なお、上述した半球状部11ａや円柱状
部分11ｂの外周面部に充填されるダイヤモンドや立方晶
窒化硼素を主体とする硬質粒子（又は粉体）の層厚等の
寸法は、特許請求の範囲をなんら減縮するものではな
い。In the above embodiment, the layer thickness of the hard particles (or powder) mainly composed of diamond or cubic boron nitride filled in the outer peripheral surfaces of the hemispherical portion 11a and the columnar portion 11b is set to about 1 mm. However, it may be in the range of about 0.3 to 1.5 mm (preferably 0.5 to 1 mm). In this case, a hemispherical portion 11a having a radius smaller by about 0.3 to 1.5 mm than the radius of the columnar cemented carbide base material serving as the blade portion 1 and a short cylindrical portion continuous therewith are provided. 11b may be formed. It should be noted that the dimensions such as the layer thickness of the hard particles (or powder) mainly composed of diamond or cubic boron nitride filled in the outer peripheral surface of the hemispherical portion 11a or the columnar portion 11b are defined in the claims. It does not reduce at all.

【００１７】[0017]

【発明の効果】発明の実施の形態の欄に記載の内容か
ら、ボール刃が形成された高硬度・高耐摩耗性焼結体
が母材から外れず、ボール刃が形成される工具先端部
分の半径の大小にかかわらず容易に製造できるボールエ
ンドミルを提供を提供できた。According to the contents of the embodiments of the present invention, the high hardness and high wear-resistant sintered body having the ball blade formed thereon does not come off from the base material and the tool tip portion where the ball blade is formed. The ball end mill provided can be easily manufactured regardless of the radius of the ball end mill.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の実施形態のボールエンドミルの正面
図。FIG. 1 is a front view of a ball end mill according to an embodiment of the present invention.

【図２】前記ボールエンドミルの刃部側の側面図。FIG. 2 is a side view of the blade end side of the ball end mill.

【図３】刃部となる円柱状の超硬合金製母材の先端面
に、これの半径より少し小さい半径の半球状部とこれに
連続する短い円柱状部分を形成した状態を示す正面図。FIG. 3 is a front view showing a state in which a hemispherical portion having a radius slightly smaller than the radius thereof and a short cylindrical portion continuous with the hemispherical portion are formed on the tip end surface of a columnar cemented carbide base material serving as a blade portion. .

【図４】前記超硬合金製母材の先端面に形成した半球状
部及び円柱状部分にダイヤモンド焼結体を一体焼結固着
して製作されたブランク材の要部の断面図。FIG. 4 is a cross-sectional view of a main part of a blank material manufactured by integrally sintering and fixing a diamond sintered body to a hemispherical portion and a columnar portion formed on the tip end surface of the cemented carbide base material.

【図５】前記超硬合金製母材の先端面に形成した半球状
部及び円柱状部分にダイヤモンド焼結体を一体焼結固着
して製作されたブランク材の要部の正面図。FIG. 5 is a front view of a main part of a blank material manufactured by integrally sintering and fixing a diamond sintered body to a hemispherical portion and a columnar portion formed on a front end surface of the cemented carbide base material.

【図６】前記ブランク材とシャンク材とを接合して成る
ボールエンドミルの半完成品の要部の断面図。FIG. 6 is a sectional view of a main part of a semi-finished product of a ball end mill formed by joining the blank material and the shank material.

【図７】前記ブランク材とシャンク材とを接合して成る
ボールエンドミルの半完成品の正面図。FIG. 7 is a front view of a semi-finished product of the ball end mill formed by joining the blank material and the shank material.

【図８】先行技術のボールエンドミルの正面図。FIG. 8 is a front view of a prior art ball end mill.

【図９】先行技術のボールエンドミルを周方向に９０°
回転させたときのの正面図。FIG. 9 shows a prior art ball end mill 90 ° circumferentially
The front view at the time of rotating.

【符号の説明】[Explanation of symbols]

Ｂ ブランク材 １ 刃部 ２ シャンク部 ３ ダイヤモンド焼結体 10 ボール部 10ａ ボール刃 11ａ 半球状部 11ｂ 円柱状部 14 ランド部 15 溝部 B Blank material 1 Blade 2 Shank 3 Diamond sintered body 10 Ball 10a Ball blade 11a Hemisphere 11b Column 14 Land 15 Groove

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 円柱状の超硬合金製母材の先端に形成し
た半球状部に、略一定の薄い層厚で高硬度・高耐摩耗性
焼結体が一体焼結固着されて成るブランク材から製造さ
れるボールエンドミルであって、前記ブランク材の少な
くとも高硬度・高耐摩耗性焼結体が位置する先端部分に
ランド部と溝部を周方向に交互に形成すると共にランド
部に残存した高硬度・高耐摩耗性焼結体部分にボール刃
を形成してあることを特徴とするボールエンドミル。1. A blank formed by integrally sintering and fixing a high hardness and high wear resistant sintered body having a substantially constant thin layer thickness to a hemispherical portion formed at the tip of a columnar cemented carbide base material. A ball end mill manufactured from a material, wherein a land portion and a groove portion are alternately formed in the circumferential direction at least at a tip portion of the blank material where the high hardness and high wear resistant sintered body is located, and the land material remains on the land portion. A ball end mill characterized in that a ball blade is formed on a high hardness and high wear resistant sintered body. 【請求項２】 円柱状の超硬合金製母材の先端に形成し
た半球状部とこれに連続する短い円柱状部に、略一定の
薄い層厚で高硬度・高耐摩耗性焼結体が一体焼結固着さ
れて成るブランク材から製造されるボールエンドミルで
あって、前記ブランク材の少なくとも高硬度・高耐摩耗
性焼結体が位置する先端部分にランド部と溝部を周方向
に交互に形成すると共に前記ランド部に残存した高硬度
・高耐摩耗性焼結体部分にボール刃を形成してあること
を特徴とするボールエンドミル。2. A high hardness and high wear resistant sintered body having a substantially constant thin layer thickness formed on a hemispherical portion formed at the tip of a columnar cemented carbide base material and a short cylindrical portion continuing from the semispherical portion. Is a ball end mill manufactured from a blank material which is integrally sintered and fixed, wherein a land portion and a groove portion are alternately arranged in a circumferential direction at least at a tip portion of the blank material where a high hardness and high wear resistant sintered body is located. A ball end mill, wherein a ball blade is formed on a high hardness and high wear resistance sintered body portion remaining on the land portion. 【請求項３】 半球状部は、超硬合金製母材の先端を段
付けして少し小さくした部分に形成されていることを特
徴とする請求項１記載のボールエンドミル。3. The ball end mill according to claim 1, wherein the hemispherical portion is formed at a slightly reduced portion by stepping the tip of a cemented carbide base material. 【請求項４】 半球状部とこれに連続する短い円柱状部
分は、超硬合金製母材の先端を段付けして少し小さくし
た部分に形成されていることを特徴とする請求項２記載
のボールエンドミル。4. A hemispherical portion and a short columnar portion continuous with the hemispherical portion are formed in a slightly reduced portion by stepping the tip of a cemented carbide base material. Ball end mill. 【請求項５】 高硬度・高耐摩耗性焼結体は、多結晶ダ
イヤモンド又は立方晶窒化硼素を主体とする硬質粒子又
は粉体を焼結したものであることを特徴とする請求項１
乃至４のいずれかに記載のボールエンドミル。5. The high-hardness / high-wear-resistant sintered body is obtained by sintering hard particles or powder mainly composed of polycrystalline diamond or cubic boron nitride.
A ball end mill according to any one of claims 1 to 4. 【請求項６】 高硬度・高耐摩耗性焼結体は、０．５〜
１ｍｍの厚さとしてあることを特徴とする請求項１乃至
５のいずれかに記載のボールエンドミル。6. The sintered body of high hardness and high wear resistance has a hardness of 0.5 to
The ball end mill according to any one of claims 1 to 5, wherein the ball end mill has a thickness of 1 mm.
JP15769898A 1998-06-05 1998-06-05 Ball end mill manufacturing method Expired - Lifetime JP4560687B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15769898A JP4560687B2 (en) 1998-06-05 1998-06-05 Ball end mill manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15769898A JP4560687B2 (en) 1998-06-05 1998-06-05 Ball end mill manufacturing method

Publications (2)

Publication Number Publication Date
JPH11347824A true JPH11347824A (en) 1999-12-21
JP4560687B2 JP4560687B2 (en) 2010-10-13

Family

ID=15655437

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP4560687B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103506820A (en) * 2013-09-29 2014-01-15 哈尔滨汽轮机厂有限责任公司 Method for recycling scrapped R6 taper ball head end mill
WO2017211462A1 (en) * 2016-06-09 2017-12-14 Hufschmied Zerspanungssysteme Gmbh Electrode graphite milling cutter and face milling cutter for machining oxide ceramics

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0271915A (en) * 1988-09-01 1990-03-12 Sumitomo Electric Ind Ltd Endmill
JPH03277412A (en) * 1990-02-07 1991-12-09 G N Tool Kk Cutting tool having twisted blade and manufacture thereof
JPH05329707A (en) * 1992-05-28 1993-12-14 Toshiba Tungaloy Co Ltd Tool raw material with superhigh pressure sintered body tip and cutting tool
JPH07241716A (en) * 1994-03-07 1995-09-19 Toshiba Tungaloy Co Ltd Rotary tool with superhigh pressure sintered compact
JPH08141817A (en) * 1994-11-10 1996-06-04 Sumitomo Electric Ind Ltd Throwaway tip for ball end mill and manufacture thereof
JPH09168911A (en) * 1996-11-08 1997-06-30 G N Tool Kk Drill manufacturing blank material and drill
JPH10128603A (en) * 1996-10-30 1998-05-19 Kyocera Corp Throw-away cutting tool for internal diameter working

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0271915A (en) * 1988-09-01 1990-03-12 Sumitomo Electric Ind Ltd Endmill
JPH03277412A (en) * 1990-02-07 1991-12-09 G N Tool Kk Cutting tool having twisted blade and manufacture thereof
JPH05329707A (en) * 1992-05-28 1993-12-14 Toshiba Tungaloy Co Ltd Tool raw material with superhigh pressure sintered body tip and cutting tool
JPH07241716A (en) * 1994-03-07 1995-09-19 Toshiba Tungaloy Co Ltd Rotary tool with superhigh pressure sintered compact
JPH08141817A (en) * 1994-11-10 1996-06-04 Sumitomo Electric Ind Ltd Throwaway tip for ball end mill and manufacture thereof
JPH10128603A (en) * 1996-10-30 1998-05-19 Kyocera Corp Throw-away cutting tool for internal diameter working
JPH09168911A (en) * 1996-11-08 1997-06-30 G N Tool Kk Drill manufacturing blank material and drill

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103506820A (en) * 2013-09-29 2014-01-15 哈尔滨汽轮机厂有限责任公司 Method for recycling scrapped R6 taper ball head end mill
WO2017211462A1 (en) * 2016-06-09 2017-12-14 Hufschmied Zerspanungssysteme Gmbh Electrode graphite milling cutter and face milling cutter for machining oxide ceramics
AU2017276509B2 (en) * 2016-06-09 2018-07-12 Hufschmied Zerspanungssysteme Gmbh Electrode graphite milling cutter and face milling cutter for machining oxide ceramics
CN108367367A (en) * 2016-06-09 2018-08-03 锻工金属切割系统有限公司 Electrode graphite milling cutter and end mill(ing) cutter for processing oxide ceramics
US10252354B2 (en) 2016-06-09 2019-04-09 Hufschmied Zerspanungssysteme Gmbh Cutter for electrode graphite and face milling cutter for machining oxide ceramics
CN108367367B (en) * 2016-06-09 2020-01-21 锻工金属切割系统有限公司 Electrode graphite milling cutter and end milling cutter for processing oxide ceramics

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