JP3196170B2 - Integrated shank end mill - Google Patents

Integrated shank end mill

Info

Publication number
JP3196170B2
JP3196170B2 JP03743899A JP3743899A JP3196170B2 JP 3196170 B2 JP3196170 B2 JP 3196170B2 JP 03743899 A JP03743899 A JP 03743899A JP 3743899 A JP3743899 A JP 3743899A JP 3196170 B2 JP3196170 B2 JP 3196170B2
Authority
JP
Japan
Prior art keywords
end mill
holder
main body
shank
tapered
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.)
Expired - Fee Related
Application number
JP03743899A
Other languages
Japanese (ja)
Other versions
JP2000233312A (en
Inventor
政一 松本
正博 田口
雄策 山本
Original Assignee
株式会社日研工作所
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 株式会社日研工作所 filed Critical 株式会社日研工作所
Priority to JP03743899A priority Critical patent/JP3196170B2/en
Priority to US09/487,416 priority patent/US6394466B1/en
Priority to EP00300960A priority patent/EP1029620B1/en
Priority to DE60045831T priority patent/DE60045831D1/en
Priority to KR1020000006362A priority patent/KR100621952B1/en
Publication of JP2000233312A publication Critical patent/JP2000233312A/en
Application granted granted Critical
Publication of JP3196170B2 publication Critical patent/JP3196170B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B23C5/1027—Ball nose end mills with one or more removable cutting inserts
    • B23C5/1036—Ball nose end mills with one or more removable cutting inserts having a single cutting insert, the cutting edges of which subtend 180 degrees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B23B31/1107—Retention by threaded connection for conical parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B23B31/1107—Retention by threaded connection for conical parts
    • B23B31/1122—Retention by threaded connection for conical parts using cylindrical threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/117—Retention by friction only, e.g. using springs, resilient sleeves, tapers
    • B23B31/1179—Retention by friction only, e.g. using springs, resilient sleeves, tapers using heating and cooling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

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、例えば金型を切
削加工する場合などに用いるシャンク一体型エンドミル
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shank-integrated end mill used for cutting a die, for example.

【０００２】[0002]

【発明が解決しようとする課題】従来のエンドミルは、
図１に示すように、ホルダ１１のホルダ本体１１ａの前
側筒状部１１ｂに設けた直線穴１１ｃに、エンドミル１
２の主体１２ａに設けた丸棒状の長いシャンク部１２ｂ
の後部を嵌め、ホルダ１１の前側筒状部１１ｂに外周側
から複数のサイドロック部材１３ａ，１３ｂをねじ嵌合
させ、これらの内端によって前記シャンク部１２ｂを直
線孔１１ｃの内面に押し付けることで、ホルダ１１にエ
ンドミル１２を装着したものがあった。また、図２に示
すように、ホルダ１１の直線孔１１ｃに、図１に示した
ものとは異なる短いシャンク部１２ｂを有するエンドミ
ル１２の超硬金属製の主体１２ａのシャンク部１２ｂの
後部を焼き嵌めしてホルダ１１にエンドミル１２を１面
拘束によって固着したものもあった。The conventional end mill is
As shown in FIG. 1, an end mill 1 is inserted into a straight hole 11c provided in a front cylindrical portion 11b of a holder main body 11a of the holder 11.
Long shank portion 12b in the shape of a round bar provided on the main body 12a
And a plurality of side lock members 13a, 13b are screwed into the front cylindrical portion 11b of the holder 11 from the outer peripheral side, and the shank portion 12b is pressed against the inner surface of the straight hole 11c by the inner ends thereof. In some cases, an end mill 12 was mounted on a holder 11. As shown in FIG. 2, the rear portion of the shank portion 12b of the cemented carbide main body 12a of the end mill 12 having a short shank portion 12b different from that shown in FIG. In some cases, the end mill 12 was fixed to the holder 11 by one-side constraint.

【０００３】しかし、前述した従来のエンドミルのシャ
ンク部の前部がホルダから前方に長く突出しているの
で、剛性を十分に確保できず、切削加工時に切削性能が
低下し、またピッチングなどの振動が発生するという問
題点があった。また、従来の焼き嵌めチャックは、ホル
ダを熱してエンドミルのシャンク部を取り付け固着し、
ホルダよりエンドミルのシャンク部を取り外す場合に
は、前記エンドミル付のホルダ全体を再度熱してホルダ
を熱膨張させて前記シャンク部を取り外すようにしてい
るため、前記ホルダの材質をエンドミルの材質より熱膨
張率の大きい材質が用いられており、前記ホルダとエン
ドミルは互いに熱膨張率の異なる材質の金属しか使用で
きなかった。However, the front end of the shank portion of the above-mentioned conventional end mill protrudes forward from the holder, so that sufficient rigidity cannot be ensured, cutting performance is reduced during cutting, and vibrations such as pitching are reduced. There was a problem that it occurred. In addition, the conventional shrink fit chuck heats the holder, attaches and fixes the shank of the end mill,
When removing the shank portion of the end mill from the holder, the entire holder with the end mill is heated again to thermally expand the holder and remove the shank portion, so that the material of the holder is more thermally expanded than the material of the end mill. A material having a high coefficient of thermal expansion is used, and the holder and the end mill can use only metals of materials having different coefficients of thermal expansion from each other.

【０００４】そこで、この発明の出願人は、平成１０年
１２月１４日に、特願平１０−３５４１７５号によっ
て、エンドミルホルダのホルダ本体の前部に長い先細テ
ーバ部を形成し、このテーパ部の前端に開口する小径孔
部を前記ホルダ本体と同軸に形成し、エンドミルの主体
に設けたシャンク部の後部に小外径部を形成し、この小
外径部を前記ホルダ本体の焼き嵌め用孔部に焼き嵌め固
定すると共に、前記小外径部の前端に設けた段を前記ホ
ルダ本体のテーパ部前端面に支持させ、前記主体の前端
部に切削手段を設けたシャンク一体型エンドミルを、先
に出願している。前記出願のシャンク一体型エンドミル
は、エンドミルの主体に設けたシャンク部の長さを短く
することで安価にし、また、エンドミルホルダの前部に
設けた焼き嵌め用孔部に、焼き嵌めするエンドミルのシ
ャンク部の小外径部外周面と前記シャンク部の段の全面
を前記ホルダ本体の前端面に当接させた２面拘束とする
ことで、剛性がかなり高く、切削加工時に振動がほとん
ど発生せず、良好な切削加工ができるようにしている。
この発明は、先に出願した特願平１０−３５４１７５号
のシャンク一体型エンドミルの効果を失うことなく、従
来の焼き嵌め温度より低い加熱温度で、ホルダ本体のテ
ーパ孔部にエンドミルの主体のシャンク部を締結できる
とともに、エンドミルの主体をホルダ本体に対して容易
に着脱でき、かつ安価なシャンク一体型エンドミルを提
供できることを目的としている。Therefore, the applicant of the present invention formed a long tapered taper portion at the front of the holder body of the end mill holder on December 14, 1998 by Japanese Patent Application No. 10-354175, and A small-diameter hole opening at the front end of the end mill is formed coaxially with the holder main body, and a small outer diameter portion is formed at the rear of a shank portion provided on the main body of the end mill, and this small outer diameter portion is used for shrink fitting of the holder main body. While shrink-fitting and fixing the hole, the step provided at the front end of the small outer diameter portion is supported on the front end face of the tapered portion of the holder body, and a shank integrated end mill provided with cutting means at the front end of the main body, Filed earlier. The integrated shank end mill of the application is inexpensive by reducing the length of the shank portion provided on the main body of the end mill, and the end mill of the end mill to be shrink-fitted into the shrink-fitting hole provided at the front portion of the end mill holder. By making the entire outer surface of the small outer diameter portion of the shank portion and the entire surface of the step of the shank portion abut on the front end surface of the holder body, the rigidity is considerably high, and almost no vibration occurs during cutting. And make good cutting work possible.
The present invention provides a shank mainly composed of an end mill in a tapered hole of a holder body at a heating temperature lower than a conventional shrink fitting temperature without losing the effect of the shank-integrated end mill of Japanese Patent Application No. 10-354175 filed earlier. It is an object of the present invention to provide an inexpensive shank-integrated end mill that can fasten a portion and easily attach / detach a main body of an end mill to / from a holder body.

【０００５】[0005]

【課題を解決するための手段】上記目的を達成するため
に、請求項１の発明は、主体を有するエンドミルと、こ
のエンドミルを保持するエンドミルホルダを備えるシャ
ンク一体型エンドミルであって、前記エンドミルホルダ
は前部に先細のテーパ部を有するホルダ本体を備え、前
記ホルダ本体に該ホルダ本体の前端面から後方に行くに
従い緩やかに細くなる所望長さのテーパ孔部が軸心を一
致して形成され、前記テーパ孔部の後端に連通し該テー
パ孔部より小径の小径孔部が前記ホルダ本体の軸心方向
に延在して形成され、前記小径孔部の後端から前記ホル
ダ本体の後端に開口する中間穴部が前記ホルダ本体に軸
心を一致して形成され、前記エンドミルの主体の先端に
切削手段が設けられ、前記エンドミルの主体の後端に、
後端に行くに従い緩やかに細くなる所望長さのテーパ付
きシャンク部が軸心を一致して設けられ、前記エンドミ
ルの主体の後端面に前記ホルダ本体の前端面に圧接され
る圧接面がシャンク部と同心円状に形成され、前記ホル
ダ本体の後端から前記小径孔部に挿通されるドローボル
トを備え、前記ホルダ本体を材質の硬度及び組織が変わ
ることのない通常の焼き嵌め温度より低い温度に加熱
し、この状態で該ホルダ本体のテーパ孔部に前記エンド
ミル主体のシャンク部を嵌入した後、前記ドローボルト
を前記シャンク部の後端に形成しためねじ孔に螺合して
前記圧接面が前記テーパ部の前端面に密着されるまで締
め付けることにより前記エンドミル主体をホルダ本体に
締結するように構成されていることを特徴とする。In order to achieve the above object, an invention according to claim 1 is an end mill having a main body and a shank-integrated end mill having an end mill holder for holding the end mill, wherein the end mill holder is provided. Is provided with a holder body having a tapered tapered portion at the front, and a tapered hole portion of a desired length gradually narrowing toward the rear from the front end face of the holder body is formed in the holder body so as to coincide with the axis. A small-diameter hole portion communicating with a rear end of the tapered hole portion and having a smaller diameter than the tapered hole portion is formed so as to extend in the axial direction of the holder main body; An intermediate hole opening at the end is formed so as to coincide with the axis of the holder main body, cutting means is provided at the tip of the main body of the end mill, and at the rear end of the main body of the end mill,
A tapered shank portion having a desired length that gradually becomes thinner toward the rear end is provided so as to coincide with the center of the axis, and a pressure contact surface pressed against the front end surface of the holder main body at the rear end surface of the main body of the end mill. And a draw bolt inserted concentrically from the rear end of the holder main body to the small-diameter hole portion, and the holder main body is set to a temperature lower than a normal shrink fitting temperature without changing the hardness and the structure of the material. After heating, in this state, the shank portion mainly composed of the end mill is fitted into the tapered hole portion of the holder main body, and then the draw bolt is screwed into a screw hole to form the draw bolt at the rear end of the shank portion. The end mill main body is configured to be fastened to the holder main body by tightening until it is closely attached to the front end face of the tapered portion.

【０００６】請求項２の発明は、請求項１記載のシャン
ク一体型エンドミルにおいて、前記エンドミル主体のホ
ルダ本体からの抜き取りは、前記ホルダ本体を通常の焼
き嵌め温度より低い温度で加熱した状態で前記ドローボ
ルトを緩め方向に回転し、該ドローボルトをエンドミル
主体側へ押圧することにより行うように構成されている
ことを特徴とする。According to a second aspect of the present invention, in the shank-integrated end mill according to the first aspect, the end mill is mainly extracted from the holder main body while the holder main body is heated at a temperature lower than a normal shrink fitting temperature. The draw bolt is rotated in a loosening direction, and the draw bolt is pressed toward the end mill main body.

【０００７】請求項３の発明は、主体を有するエンドミ
ルと、このエンドミルを保持するエンドミルホルダを備
えるシャンク一体型エンドミルであって、前記エンドミ
ルホルダは前部に先細のテーパ部を有するホルダ本体を
備え、前記ホルダ本体には該ホルダ本体の前端面から後
方に行くに従い緩やかに細くなる所望長さのテーパ孔部
が軸心を一致して形成され、前記テーパ孔部の後端に連
通するめねじが前記ホルダ本体に形成され、前記エンド
ミルの主体の先端に切削手段が設けられ、前記エンドミ
ルの主体の後端に、後端に行くに従い緩やかに細くなる
所望長さのテーパ付きシャンク部が軸心を一致して設け
られ、前記シャンク部の嵌入先端に前記めねじに螺合さ
れるおねじ部が設けられ、前記エンドミルの主体の後端
面に前記ホルダ本体の前端面に圧接される圧接面がシャ
ンク部と同心円状に形成され、前記ホルダ本体を材質の
硬度及び組織が変わることのない通常の焼き嵌め温度よ
り低い温度に加熱し、この状態で該ホルダ本体のテーパ
孔部に前記エンドミル主体のシャンク部を嵌入し、かつ
前記シャンク部のおねじ部を前記テーパ孔部のめねじに
螺合して前記圧接面が前記テーパ部の前端面に密着され
るまで締め付けることにより前記エンドミル主体をホル
ダ本体に締結するように構成されていることを特徴とす
る。According to a third aspect of the present invention, there is provided an end mill having a main body and a shank-integrated end mill including an end mill holder for holding the end mill, wherein the end mill holder includes a holder body having a tapered tapered portion at a front portion. A tapered hole having a desired length is formed in the holder main body so as to gradually taper toward the rear from the front end face of the holder main body so as to coincide with the axis thereof, and an internal thread communicating with the rear end of the tapered hole is formed. A cutting means is provided at the front end of the main body of the end mill, which is formed on the holder main body, and a tapered shank portion having a desired length that gradually becomes thinner toward the rear end at the rear end of the main body of the end mill has an axial center. A male thread portion is provided at the fitting end of the shank portion and is screwed to the female thread. A pressing surface pressed against the front end surface of the holder is formed concentrically with the shank portion, and the holder body is heated to a temperature lower than a normal shrink fitting temperature at which the hardness and the structure of the material do not change. The shank portion mainly composed of the end mill is fitted into the tapered hole portion of the main body, and the male screw portion of the shank portion is screwed into the female screw of the tapered hole portion so that the pressure contact surface is in close contact with the front end surface of the tapered portion. The end mill main body is configured to be fastened to the holder main body by tightening until the end mill is tightened.

【０００８】請求項４の発明は、請求項３記載のシャン
ク一体型エンドミルにおいて、前記エンドミル主体のホ
ルダ本体からの抜き取りは、前記ホルダ本体を通常の焼
き嵌め温度より低い温度で加熱した状態で前記シャンク
部のおねじ部を緩め方向に回転して外すことにより行う
ように構成されていることを特徴とする。According to a fourth aspect of the present invention, in the shank-integrated end mill according to the third aspect, the end mill is mainly extracted from the holder body while the holder body is heated at a temperature lower than a normal shrink fitting temperature. The method is characterized in that the shank portion is configured to be removed by rotating the male screw portion in a loosening direction.

【０００９】請求項５の発明は、請求項１または３記載
のシャンク一体型エンドミルにおいて、前記エンドミル
ホルダのホルダ本体に、前記ホルダ本体の前端面から前
記エンドミルの先端に向けクーラントなどの流体を噴出
させる噴出孔を設けたことを特徴とする。請求項６の発
明は、請求項５記載のシャンク一体型エンドミルにおい
て、前記噴出孔に流体噴出方向を変更する噴出角度変更
部材を設けたことを特徴とする。請求項７の発明は、請
求項１または３記載のシャンク一体型エンドミルにおい
て、前記エンドミルの主体の先端部にスローアウェイ式
のボールチップからなる切削手段が着脱可能に装着され
ることを特徴とする。請求項８の発明は、請求項１また
は３記載のシャンク一体型エンドミルにおいて、前記通
常の焼き嵌め温度より低い温度は材質の硬度、組織を変
えない２００℃以下の温度であることを特徴とする。According to a fifth aspect of the present invention, in the shank-integrated end mill according to the first or third aspect, a fluid such as a coolant is jetted from a front end face of the holder body toward a tip end of the end mill to the holder body of the end mill holder. It is characterized by having an ejection hole to make it. According to a sixth aspect of the present invention, in the shank integrated end mill according to the fifth aspect, an ejection angle changing member for changing a fluid ejection direction is provided in the ejection hole. According to a seventh aspect of the present invention, in the shank integrated end mill according to the first or third aspect, a cutting means made of a throw-away type ball tip is detachably attached to a leading end portion of the main body of the end mill. . According to an eighth aspect of the present invention, in the shank-integrated end mill according to the first or third aspect, the temperature lower than the normal shrink fitting temperature is a temperature of 200 ° C. or less which does not change the hardness and structure of the material. .

【００１０】[0010]

【発明の実施の形態】以下、この発明の一実施形態につ
き、図を参照して説明する。この発明の一実施形態に係
るシャンク一体型エンドミルは、図３，図４に示すよう
に、エンドミルホルダ１とエンドミル２とからなり、こ
れらは鋼鉄などの弾性金属製である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The shank-integrated end mill according to one embodiment of the present invention includes an end mill holder 1 and an end mill 2 as shown in FIGS. 3 and 4, which are made of an elastic metal such as steel.

【００１１】エンドミルホルダ１はホルダ本体３を備
え、このホルダ本体３は後端部にテーパシャンク部３ａ
を、中間部に外周面にＶ溝３ｃを有する自動工具交換用
のフランジ部３ｂを、このフランジ部３ｂの前部にフラ
ンジ部３ｂから前端に行くにしたがい細くなるテーパ部
３ｄを有し、これらは軸心を一致して一連に形成されて
いる。The end mill holder 1 has a holder main body 3, and the holder main body 3 has a tapered shank portion 3a at its rear end.
A flange portion 3b for automatic tool change having a V-groove 3c on an outer peripheral surface at an intermediate portion, and a taper portion 3d which becomes thinner as going from the flange portion 3b to the front end at a front portion of the flange portion 3b. Are formed in a series with their axes aligned.

【００１２】また、ホルダ本体３は、後部から前部に向
かって、めねじ孔部３ｅ，中間孔部３ｆ，小径孔部３
ｇ，内周面が１／２００テーパなど緩やかなテーパで後
側に細くなり、前端に開口するテーパ孔部３ｈが軸心を
一致して一連に形成されている前記先細テーパ部３ｄ
は、５°〜６°程度の角度で前端側に細くなるように形
成され、その前端面３ｉはホルダ本体３の軸心に対し直
角に形成されている。前記ホルダ本体３のめねじ孔部３
ｅにプルスタッド４の先端部を締め付け固定してあり、
プルスタッド４には、これを軸心方向に貫通する中心孔
４ａが形成されている。The holder body 3 has a female screw hole 3e, an intermediate hole 3f, and a small-diameter hole 3 from the rear to the front.
g, the inner peripheral surface is tapered to the rear side with a gentle taper such as 1/200 taper, and the tapered hole portion 3h opening at the front end is formed in a series with the axial center aligned with the tapered tapered portion 3d.
Is formed so as to taper toward the front end side at an angle of about 5 ° to 6 °, and the front end face 3i is formed at right angles to the axis of the holder body 3. Female thread hole 3 of holder body 3
e, the tip of the pull stud 4 is tightened and fixed.
The pull stud 4 has a center hole 4a penetrating it in the axial direction.

【００１３】前記エンドミル２は主体５を備え、この主
体５は、外周面５ｇが１／２００テーパなど、前端から
後端に行くに従い緩やかに細くなるテーパを有するシャ
ンク部５ａと、シャンク部５ａの前端に軸心を一致して
一体化された前部５ｂを有しており、シャンク部５ａは
前記テーパ孔部３ｈの内径より若干大きい径になってい
る。また、前部５ｂはシャンク部５ａとの接合側が大外
径となる前側部５ｄを有し、この前側部５ｄに形成した
切り欠き５ｅにスローアウェイ式のボールチップからな
る切削手段６が着脱可能に装着されている。そして、前
部５ｂの後端面５ｃはシャンク部５ａの径より大きい径
の同心円状に形成され、かつシャンク部５ａの外周面に
対し直角９０°に形成されいる。The end mill 2 includes a main body 5. The main body 5 includes a shank portion 5 a having an outer peripheral surface 5 g having a taper such as a 1/200 taper that gradually decreases from the front end to the rear end, and a shank portion 5 a. The front end has a front portion 5b integrated with the axis aligned, and the shank portion 5a has a diameter slightly larger than the inner diameter of the tapered hole portion 3h. The front part 5b has a front part 5d whose joining side with the shank part 5a has a large outer diameter, and a cutting means 6 made of a throw-away type ball tip is detachable in a notch 5e formed in the front part 5d. It is attached to. The rear end face 5c of the front portion 5b is formed concentrically with a diameter larger than the diameter of the shank portion 5a, and is formed at a right angle to the outer peripheral surface of the shank portion 5a.

【００１４】なお、エンドミル２の主体５のシャンク部
５ａは、図５に示すように、後端に行くに従い細くなる
テーパに形成され、また、主体５の前側部５ｄは、エン
ドミルホルダ１のホルダ本体３の先細のテーパ部３ｄよ
りも緩やかな先細に形成されている。As shown in FIG. 5, the shank portion 5a of the main body 5 of the end mill 2 is formed in a tapered shape which becomes thinner toward the rear end, and the front side 5d of the main body 5 is formed as a holder of the end mill holder 1. The tapered portion 3d of the main body 3 is formed to have a gentler taper than the tapered portion 3d.

【００１５】なお、本実施の形態における焼き嵌め温度
より低い加熱温度とは、２００℃程度以下であり、テー
パ孔部３ｈおよびシャンク部５ａのテーパ角度は、1 ／
50〜1 ／200 の範囲とする。また、一般的な焼き嵌め温
度は３００℃〜６００℃であるが、前記実施の形態では
２００℃としている。これは、通常鋼材の焼入れ後の焼
戻し温度は２００℃以下であり、２００℃以下であれ
ば、材質の硬度，組織を変えることがないことに着目し
ている。例えば、シャンク部の内径φ10mmの場合、焼き
嵌め加熱温度が２００℃であると、内径が直径当たり約
0.02mm膨張し、さらに1 ／200 テーパであると、軸方向
に４mm引き込んだことになり、適切な締め代となる。し
たがって、テーパ孔部３ｈとシャンク部５ａが1 ／50〜
1 ／200 のテーパ角度で互いに嵌合する構成にしたか
ら、焼き嵌め時の温度を従来のような３００℃〜６００
℃の温度に加熱しなくとも、２００℃程度の低い温度で
焼き嵌めすることが可能になる。The heating temperature lower than the shrink fitting temperature in the present embodiment is about 200 ° C. or less, and the taper angle of the tapered hole 3h and the shank 5a is 1/1/3.
The range is 50 to 1/200. The general shrink fitting temperature is 300 ° C. to 600 ° C., but is set to 200 ° C. in the above embodiment. This focuses on the fact that the tempering temperature after quenching of a steel material is usually 200 ° C. or less, and if it is 200 ° C. or less, the hardness and structure of the material are not changed. For example, when the inner diameter of the shank is φ10 mm, if the shrink fitting heating temperature is 200 ° C., the inner diameter is about
If it expands by 0.02 mm and has a 1/200 taper, it will be retracted 4 mm in the axial direction, which is an appropriate interference. Therefore, the tapered hole 3h and the shank 5a are 1 / 50-
Since the taper angle is set to 1/200, the temperature at the time of shrink fitting is set to 300 ° C. to 600 ° C.
Even without heating to a temperature of ° C., shrink fitting can be performed at a temperature as low as about 200 ° C.

【００１６】そして、ドローボルト７のおねじ部７ａを
エンドミルホルダ１のホルダ本体３内の後側から小径孔
部３ｇに挿通して、エンドミル２の主体５の後部に予め
形成しためねじ孔５ｆにねじ嵌合させて締め付けること
で、より強固に前記ホルダ本体３にエンドミル２の主体
５を一体に締結することができる。Then, the external thread portion 7a of the draw bolt 7 is inserted into the small-diameter hole portion 3g from the rear side in the holder main body 3 of the end mill holder 1, and the screw hole 5f is formed in the rear portion of the main body 5 of the end mill 2 in advance. The main body 5 of the end mill 2 can be more securely fastened to the holder main body 3 by screw-fitting and tightening.

【００１７】図３，図９に示す実施形態において、必要
に応じてエンドミル２をエンドミルホルダ１から抜き取
る場合は、一般の焼き嵌め温度（３００℃〜６００℃）
より低い温度（２００℃程度）でエンドミルホルダ１の
ホルダ本体３を加熱し、この状態でドローボルト７を緩
め、このボルト７の頭部をたたくことで、エンドミルホ
ルダ１のホルダ本体３からエンドミル２の主体４に設け
たシャンク部５ａを簡単に引き抜くことができる。In the embodiment shown in FIGS. 3 and 9, when the end mill 2 is removed from the end mill holder 1 as required, a general shrink fitting temperature (300 ° C. to 600 ° C.)
The holder body 3 of the end mill holder 1 is heated at a lower temperature (about 200 ° C.), the draw bolt 7 is loosened in this state, and the head of the bolt 7 is beaten. The shank portion 5a provided on the main body 4 can be easily pulled out.

【００１８】次に、図６により本発明にかかるシャンク
一体型エンドミル変形例について説明する。この図６に
おいて、図３と同一の構成要素には同一符号を付してそ
の説明を省略し、図３と異なる部分を重点に述べると、
この変形例においては、ホルダ本体３のテーパ孔部３ｈ
の後端に連通するめねじ３ｊが形成され、エンドミル２
のシャンク部５ａの嵌入先端に前記めねじ３ｊに螺合さ
れるおねじ部５ｈが設けられている点が図３と異なる。Next, a modified example of the shank-integrated end mill according to the present invention will be described with reference to FIG. In FIG. 6, the same components as those in FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted.
In this modification, the tapered hole 3h of the holder body 3
A female screw 3j communicating with the rear end of the end mill 2 is formed.
3 in that a male screw portion 5h screwed to the female screw 3j is provided at the fitting end of the shank portion 5a.

【００１９】この変形例において、エンドミル２をホル
ダ本体３に締結する場合は、エンドミルホルダ１のホル
ダ本体３を、一般の焼き嵌め温度（３００℃〜６００
℃）より低い温度（２００℃程度）に加熱し、この状態
で、テーパ孔部３ｈにシャンク部５ａを焼き嵌めし、か
つおねじ部５ｈをめねじ３ｊに螺合して締め付けること
により、圧接面５ｃがホルダ本体３の前端面３ｉに密着
される。これにより、ホルダ本体３にエンドミル２の主
体５を一体に締結することができる。また、この図６に
示す変形例においても、必要に応じてエンドミル２をエ
ンドミルホルダ１から抜き取る場合は、一般の焼き嵌め
温度（３００℃〜６００℃）より低い温度（２００℃程
度）でエンドミルホルダ１のホルダ本体３を加熱し、エ
ンドミル本体１のホルダ本体３に設けためねじ３ｊに対
し、エンドミル２のシャンク部５ａに設けたおねじ部５
ｈを緩め方向に回転させて外すことで、シャンク部５ａ
を引き抜くことができる。In this modification, when the end mill 2 is fastened to the holder body 3, the holder body 3 of the end mill holder 1 is set at a general shrink fitting temperature (300 ° C. to 600 ° C.).
C.), and in this state, the shank portion 5a is shrink-fitted into the tapered hole portion 3h, and the male screw portion 5h is screwed into the female screw 3j to be tightened. 5 c is brought into close contact with the front end face 3 i of the holder body 3. Thereby, the main body 5 of the end mill 2 can be integrally fastened to the holder body 3. Also, in the modification shown in FIG. 6, when the end mill 2 is to be extracted from the end mill holder 1 as necessary, the end mill holder is set at a temperature (about 200 ° C.) lower than a general shrink fitting temperature (300 ° C. to 600 ° C.). The holder body 3 of the end mill 2 is heated by heating the holder body 3 of the end mill body 1 with respect to the screw 3j.
By rotating h in the loosening direction and removing it, the shank 5a
Can be pulled out.

【００２０】このような図６に示す変形例においては、
エンドミルホルダ１のホルダ本体３の前部に設けた孔部
３ｈの後端部にめねじ３ｊを形成し、エンドミル２の主
体５の後部に予め形成したおねじ部５ｈを、めねじ３ｊ
にねじ嵌合させて締結することで、前記ドローボルトを
使用することなく、前記ホルダ本体３に前記主体５を固
定できるほか、図３に示す場合と同様な作用効果が得ら
れる。In the modification shown in FIG. 6,
A female screw 3j is formed at the rear end of a hole 3h provided at the front of the holder main body 3 of the end mill holder 1, and a male screw 5h previously formed at the rear of the main body 5 of the end mill 2 is attached to the female screw 3j.
By screw-fitting the main body 5, the main body 5 can be fixed to the holder main body 3 without using the draw bolt, and the same operational effects as those shown in FIG. 3 can be obtained.

【００２１】また、図７に示すように、エンドミルホル
ダ１のホルダ本体３のテーパ孔部３ｈの内周面に横断面
が三角形または円弧状の溝３ｋを周方向の複数箇所に、
ホルダ本体３の軸方向に沿って形成し、前記ホルダ本体
３の前端から、クーラント，切削液などの気体，液体す
なわち流体を噴出させるようにしたり、図８に示すよう
に、エンドミルホルダ１のホルダ本体３の先細のテーパ
部３ｄに、小孔３ｎを周方向の複数箇所に、ホルダ本体
３の軸方向に沿って形成し、前記ホルダ本体３の前端か
らクーラントなどの流体を噴出させるようにしてもよ
い。なお、図７，図８に示した溝３ｋ，小孔３ｎには、
従来公知の手段でクーラントなどを供給可能にしてあ
る。As shown in FIG. 7, grooves 3k having a triangular or arc-shaped cross section are formed in the inner peripheral surface of the tapered hole portion 3h of the holder body 3 of the end mill holder 1 at a plurality of positions in the circumferential direction.
It is formed along the axial direction of the holder main body 3, and a gas or liquid, that is, a fluid such as a coolant or a cutting fluid is ejected from the front end of the holder main body 3, or as shown in FIG. Small holes 3n are formed in the tapered tapered portion 3d of the main body 3 at a plurality of positions in the circumferential direction along the axial direction of the holder main body 3 so that a fluid such as a coolant is ejected from the front end of the holder main body 3. Is also good. The grooves 3k and the small holes 3n shown in FIGS.
Coolant and the like can be supplied by conventionally known means.

【００２２】なた、図９に示すように、エンドミルホル
ダ１のホルダ本体３の後端部に円筒状のシャンク部３ｍ
を形成し、プルスタッド４の大径鍔部４ｂと自動工具交
換用のフランジ部３ｂとの間に、テーパコーン８を嵌合
させ、これの前端側を複数の皿ばね９を介してフランジ
部３ｂに支持して押し付けるようにしてもよく、テーパ
コーン８の後端に環状のワッシャ１０を介在させてあ
る。なお、図９に示したエンドミルの前述した以外の構
成は、図３に示したものと同様である。As shown in FIG. 9, a cylindrical shank 3 m is provided at the rear end of the holder body 3 of the end mill holder 1.
The tapered cone 8 is fitted between the large diameter flange 4b of the pull stud 4 and the flange 3b for automatic tool change, and the front end of the tapered cone 8 is connected to the flange 3b via a plurality of disc springs 9. The annular washer 10 is interposed at the rear end of the tapered cone 8. The configuration of the end mill shown in FIG. 9 other than that described above is the same as that shown in FIG.

【００２３】また、図１０の( Ａ) ，( Ｂ) に示すよう
に、エンドミルホルダ１のホルダ本体３の先細のテーパ
部３ｄに、小孔３ｎを周方向の複数箇所に、ホルダ本体
３の軸方向に沿って形成し、前記小孔３ｎの前端には、
クーラントなどの流体を噴出させ、かつ噴出方向を規制
する噴出角度変更部材である噴出孔２０ａに傾斜角度を
持たせた円筒状のブッシュ２０をそれぞれ嵌合またはね
じ止めして固定してもよい。このような噴出角度変更部
材を備えることにより、クーラントなどの流体をエンド
ミル先端の切削部材に対し確実に噴出させることができ
ると共に、ホルダの先端径が細いため小孔３ｎの流体出
口に噴出方向を規制する傾斜角度を持たせた噴出孔を形
成できない場合にとくに有効である。Also, as shown in FIGS. 10A and 10B, small holes 3n are provided at a plurality of circumferential positions in the tapered tapered portion 3d of the holder body 3 of the end mill holder 1, and the holder body 3 It is formed along the axial direction, and at the front end of the small hole 3n,
A cylindrical bush 20 having an inclined angle may be fixed to the ejection hole 20a, which is an ejection angle changing member that ejects a fluid such as a coolant and regulates the ejection direction, by fitting or screwing it. By providing such an ejection angle changing member, a fluid such as a coolant can be reliably ejected to the cutting member at the end of the end mill, and since the tip diameter of the holder is small, the ejection direction is set to the fluid outlet of the small hole 3n. This is particularly effective when it is not possible to form an ejection hole having a restricted inclination angle.

【００２４】さらに、この発明において、エンドミルの
主体の前端部に設ける切削手段である切削部材は、ボー
ルチップに限定されることなく適宜変更でき、さらに、
前記主体のシャンク部の先端部に、直刃，ねじれ刃など
を一体に形成したものでもよい。Further, in the present invention, the cutting member which is a cutting means provided at the front end of the main body of the end mill can be appropriately changed without being limited to a ball chip.
A straight blade, a twist blade or the like may be integrally formed at the tip of the shank portion of the main body.

【００２５】さらにまた、図３などに示すように、必要
に応じてエンドミルホルダ１のホルダ本体３に設けた先
細のテーパ部３ｄを長くすることで、エンドミル２の主
体５後部に形成したシャンク部５ａの外径部５ｇを先細
テーパ状に形成し、シャンク部５ａの長さを短くして高
価な超硬金属製のロングサイズエンドミルの使用を少な
くし、安価に提供でき、また、剛性の高いエンドミルホ
ルダが実現でき、精度の高い加工が可能になる。Further, as shown in FIG. 3 and the like, the shank formed at the rear of the main body 5 of the end mill 2 by increasing the length of the tapered portion 3d provided on the holder body 3 of the end mill holder 1 as necessary. The outer diameter portion 5g of 5a is formed in a tapered shape, and the length of the shank portion 5a is shortened to reduce the use of an expensive long end mill made of a hard metal. A holder can be realized, and highly accurate processing can be performed.

【００２６】そして、金型を加工する場合に、ボールエ
ンドミルの半径外周とエンドミルホルダのホルダ本体の
半径外周とホルダの根元を結んだ角度が、前記金型の抜
き勾配より小さい角度になって好ましい。When the die is machined, the angle connecting the outer circumference of the ball end mill to the outer circumference of the holder body of the end mill holder and the root of the holder is preferably smaller than the draft angle of the die. .

【００２７】[0027]

【発明の効果】以上説明したように、請求項１、２の発
明に係るシャンク一体型エンドミルによれば、ホルダ本
体に該ホルダ本体の前端面から後方に行くに従い緩やか
に細くなる所望長さのテーパ孔部を軸心を一致して形成
し、エンドミルの主体の後端には、後端に行くに従い緩
やかに細くなる所望長さのテーパ付きシャンク部を軸心
を一致して設け、このシャンク部を前記テーパ孔部に嵌
合して、ホルダ本体内に設けたドローボルトで締め付け
得る構成にすることにより、エンドミル主体のホルダ本
体への締結は、ホルダ本体を通常の焼き嵌め温度より低
い温度で加熱した状態で前記シャンク部を前記テーパ孔
部に嵌入し、かつホルダ本体内に設けたドローボルトを
シャンク部の後端に形成しためねじ孔に螺合してエンド
ミル主体の圧接面がホルダ本体の前端面に密着されるま
で締め付けることにより行い、また、エンドミル主体の
ホルダ本体からの抜き取りは、ホルダ本体を通常の焼き
嵌め温度より低い温度で加熱した状態でドローボルトを
緩め方向に回転し、該ボルトをエンドミル主体側へ押圧
することにより行う構成にしたので、焼き嵌め温度を従
来のような３００℃〜６００℃の温度に加熱しなくと
も、２００℃程度の低い温度でエンドミル主体をホルダ
本体に対して容易に着脱することができ、しかも、エン
ドミルの主体に設けたシャンク部の長さを短くすること
ができ、高価なロングサイズエンドミルの使用を少なく
することでも安価にでき、また、エンドミル主体の圧接
面を前記ホルダ本体の前端面に当接させた２面拘束とす
ることで、剛性がかなり高く、切削加工時に振動がほと
んど発生せず、良好な切削加工ができる。As described above, according to the shank-integrated end mill according to the first and second aspects of the present invention, the holder main body has a desired length which gradually becomes thinner from the front end face of the holder main body toward the rear. A tapered hole is formed so that its axis is aligned, and at the rear end of the main body of the end mill, a tapered shank portion of a desired length that gradually becomes thinner toward the rear end is provided so that its axis is aligned. The end mill is fastened to the holder main body at a temperature lower than the normal shrink fitting temperature by fastening the end main body to the holder main body by adopting a configuration in which the portion is fitted into the tapered hole portion and can be tightened with a draw bolt provided in the holder main body. In the state heated in the above, the shank portion is fitted into the tapered hole portion, and a draw bolt provided in the holder body is formed at the rear end of the shank portion and screwed into a screw hole to form a press contact surface mainly composed of an end mill. Tighten until it is in close contact with the front end face of the holder body, and remove the main body of the end mill from the holder body by rotating the draw bolt in the loosening direction with the holder body heated at a temperature lower than the normal shrink fitting temperature. Since the bolt is pressed to the end mill main body side, the end mill main body is kept at a low temperature of about 200 ° C. without heating the shrink fitting temperature to 300 ° C. to 600 ° C. as in the related art. It can be easily attached to and detached from the holder body, and the length of the shank provided on the main body of the end mill can be shortened. By making the pressure contact surface mainly of the end mill abut on the front end surface of the holder body, the rigidity is considerably high, and the Sometimes vibration is hardly generated, it is a good cutting.

【００２８】また、請求項３、４の発明に係るシャンク
一体型エンドミルによれば、ホルダ本体に該ホルダ本体
の前端面から後方に行くに従い緩やかに細くなる所望長
さのテーパ孔部を軸心を一致して形成し、エンドミルの
主体の後端には、後端に行くに従い緩やかに細くなる所
望長さのテーパ付きシャンク部を軸心を一致して設け、
このシャンク部をテーパ孔部に嵌合して、前記シャンク
部の嵌入先端に設けたおねじ部を前記ホルダ本体内に設
けためねじに螺合できる構成にすることにより、エンド
ミル主体のホルダ本体への締結は、ホルダ本体を通常の
焼き嵌め温度より低い温度で加熱した状態で前記シャン
ク部を前記テーパ孔部に嵌入し、かつシャンク部のおね
じ部をめねじに螺合してエンドミル主体の圧接面がホル
ダ本体の前端面に密着されるまで締め付けることにより
行い、また、エンドミル主体のホルダ本体からの抜き取
りは、ホルダ本体を通常の焼き嵌め温度より低い温度で
加熱した状態でシャンク部のおねじ部を緩め方向に回転
して外すことにより行う構成にしたので、焼き嵌め温度
を従来のような３００℃〜６００℃の温度に加熱しなく
とも、２００℃程度の低い温度でエンドミル主体をホル
ダ本体に対して容易に着脱することができ、しかも、エ
ンドミルの主体に設けたシャンク部の長さを短くするこ
とができ、高価なロングサイズエンドミルの使用を少な
くすることでも安価にでき、また、エンドミル主体の圧
接面を前記ホルダ本体の前端面に当接させた２面拘束と
することで、剛性がかなり高く、切削加工時に振動がほ
とんど発生せず、良好な切削加工ができるほか、ドロー
ボルトを省略できる。Further, according to the shank-integrated end mill according to the third and fourth aspects of the present invention, the tapered hole portion of the desired length gradually narrows toward the rear from the front end surface of the holder main body. In the rear end of the main body of the end mill, a tapered shank portion of a desired length gradually narrowing toward the rear end is provided so as to coincide with the axis,
The shank portion is fitted into the tapered hole portion, and the male thread portion provided at the fitting tip of the shank portion is formed in the holder body so that the male screw portion can be screwed into a screw. The fastening of the shank portion is inserted into the tapered hole while the holder body is heated at a temperature lower than the normal shrink fitting temperature, and the external thread portion of the shank portion is screwed into the internal thread to mainly engage the end mill. Tighten until the pressure contact surface is in close contact with the front end face of the holder main body, and remove the main body of the end mill from the holder main body by heating the holder main body at a temperature lower than the normal shrink fitting temperature. Since the screw portion is rotated and removed in the loosening direction, the shrink-fitting temperature is about 200 ° C. without heating to a conventional temperature of 300 ° C. to 600 ° C. The main body of the end mill can be easily attached to and detached from the holder body at a low temperature, and the length of the shank provided on the main body of the end mill can be shortened, thereby reducing the use of expensive long size end mills. However, by making the pressure contact surface mainly of the end mill in contact with the front end surface of the holder body as a two-surface constraint, the rigidity is considerably high, vibration is hardly generated at the time of cutting, and good cutting is performed. In addition to processing, the draw bolt can be omitted.

【００２９】請求項５、６の発明よれば、エンドミルホ
ルダのホルダ本体に、ホルダ本体の前端面からエンドミ
ルの先端に向けクーラントなどの流体を噴出させる噴出
孔を設けたり、噴出孔の流体噴出方向を噴出角度変更部
材により変更できるようしたので、加工時に被加工物の
冷却や切り粉などの付着防止を必要に応じて行なうこと
ができて、好ましい。According to the fifth and sixth aspects of the present invention, an ejection hole for ejecting a fluid such as a coolant from the front end face of the holder body toward the end of the end mill is provided in the holder body of the end mill holder, or a fluid ejection direction of the ejection hole. Can be changed by the ejection angle changing member, so that it is possible to cool the work piece and to prevent the adhesion of the swarf or the like at the time of processing, which is preferable.

【００３０】請求項７の発明によれば、エンドミルの主
体の先端部にスローアウェイ式のボールチップからなる
切削手段が着脱可能に装着されるので、切削手段の摩耗
などによってホルダ本体より一々エンドミルを取り外す
ことなく、スローアウエイチップを交換するだけで切削
作業が可能となると共に、エンドミルの材質はホルダと
熱膨張率の異なる金属材料を用いることもなく、超硬金
属製であっても、ＨＳＳなどのように、前記ホルダと熱
膨張率がほぼ同一のものでも使用することができる。According to the seventh aspect of the present invention, since the cutting means composed of a throw-away type ball tip is detachably attached to the tip of the main body of the end mill, the end mill is removed from the holder body one by one due to wear of the cutting means. It is possible to perform cutting work simply by replacing the throw-away tip without removing it, and the end mill is not made of a metal material having a different coefficient of thermal expansion from that of the holder. As described above, a holder having substantially the same thermal expansion coefficient as that of the holder can be used.

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

【図１】従来のエンドミルの一例を示した一部切り欠き
側面図。FIG. 1 is a partially cutaway side view showing an example of a conventional end mill.

【図２】従来のエンドミルの他例を示した一部切り欠き
側面図。FIG. 2 is a partially cutaway side view showing another example of a conventional end mill.

【図３】この発明の一実施形態に係るシャンク一体型エ
ンドミルの一部切り欠き側面図。FIG. 3 is a partially cutaway side view of the shank integrated end mill according to the embodiment of the present invention.

【図４】図３に示したシャンク一体型エンドミルの腰部
の分解説明図。FIG. 4 is an exploded explanatory view of a waist portion of the shank integrated type end mill shown in FIG. 3;

【図５】図３に示したシャンク一体型エンドミルの主体
の説明図。FIG. 5 is an explanatory view of a main part of the shank-integrated end mill shown in FIG. 3;

【図６】シャンク一体型エンドミルの締結部の変形例の
縦断側面図。FIG. 6 is a longitudinal sectional side view of a modified example of a fastening portion of a shank integrated type end mill.

【図７】シャンク一体型エンドミルの本体の前端面図。FIG. 7 is a front end view of a main body of the shank-integrated end mill.

【図８】シャンク一体型エンドミルの本体の変形例を示
した前端面図。FIG. 8 is a front end view showing a modification of the main body of the shank-integrated end mill.

【図９】図３に示したシャンク一体型エンドミルの変形
例の一部切り欠き側面図。FIG. 9 is a partially cutaway side view of a modification of the shank integrated end mill shown in FIG. 3;

【図１０】( Ａ) はシャンク一体型エンドミルの締結部
の変形例で、( Ｂ) のＡ−Ａ線の縦断側面図、( Ｂ) は
( Ａ) の前端面図。10 (A) is a modified example of a fastening portion of a shank integrated type end mill, and FIG. 10 (B) is a longitudinal side view taken along the line AA of FIG.
The front end view of (A).

【符号の説明】[Explanation of symbols]

１ エンドミルホルダ ２ エンドミル ３ ホルダ本体 ３ａ テーパシャンク部 ３ｂ フランジ部 ３ｄ 先細のテーパ部 ３ｅ めねじ孔部 ３ｆ 中間孔部 ３ｇ 小径孔部 ３ｈ テーパ孔部 ３ｉ 前端面 ３ｊ めねじ ３ｋ 溝 ３ｎ シャンク部 ４ プルスタッド ５ エンドミルの主体 ５ａ シャンク部 ５ｂ 前部 ５ｃ 圧接面 ５ｄ 前側部 ５ｅ 切り欠き ５ｆ めねじ孔 ６ 切削手段 ７ ドローボルト ７ａ おねじ部 ８ テーパコーン ９ 皿ばね ２０ ブッシュ（噴出角度変更部材） ２０ａ 噴出孔 Reference Signs List 1 end mill holder 2 end mill 3 holder body 3a taper shank 3b flange 3d tapered portion 3e female screw hole 3f intermediate hole 3g small diameter hole 3h taper hole 3i front end face 3j female screw 3k groove 3n shank 4 pull Stud 5 Main body of end mill 5a Shank portion 5b Front portion 5c Press-contact surface 5d Front side portion 5e Notch 5f Female screw hole 6 Cutting means 7 Draw bolt 7a Male thread portion 8 Taper cone 9 Disc spring 20 Bush (spout angle changing member) 20a Spout hole

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平９−248727（ＪＰ，Ａ) 実開 昭57−181537（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23C 5/10 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-248727 (JP, A) JP-A-57-181537 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B23C 5/10

Claims (8)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 主体を有するエンドミルと、このエンド
ミルを保持するエンドミルホルダを備えるシャンク一体
型エンドミルであって、 前記エンドミルホルダは前部に先細のテーパ部を有する
ホルダ本体を備え、 前記ホルダ本体に該ホルダ本体の前端面から後方に行く
に従い緩やかに細くなる所望長さのテーパ孔部が軸心を
一致して形成され、 前記テーパ孔部の後端に連通し該テーパ孔部より小径の
小径孔部が前記ホルダ本体の軸心方向に延在して形成さ
れ、 前記小径孔部の後端から前記ホルダ本体の後端に開口す
る中間穴部が前記ホルダ本体に軸心を一致して形成さ
れ、 前記エンドミルの主体の先端に切削手段が設けられ、 前記エンドミルの主体の後端に、後端に行くに従い緩や
かに細くなる所望長さのテーパ付きシャンク部が軸心を
一致して設けられ、 前記エンドミルの主体の後端面に前記ホルダ本体の前端
面に圧接される圧接面がシャンク部と同心円状に形成さ
れ、 前記ホルダ本体の後端から前記小径孔部に挿通されるド
ローボルトを備え、 前記ホルダ本体を材質の硬度及び組織が変わることのな
い通常の焼き嵌め温度より低い温度に加熱し、この状態
で該ホルダ本体のテーパ孔部に前記エンドミル主体のシ
ャンク部を嵌入した後、前記ドローボルトを前記シャン
ク部の後端に形成しためねじ孔に螺合して前記圧接面が
前記テーパ部の前端面に密着されるまで締め付けること
により前記エンドミル主体をホルダ本体に締結するよう
に構成されていることを特徴とするシャンク一体型エン
ドミル。An end mill having a main body and a shank-integrated end mill including an end mill holder for holding the end mill, wherein the end mill holder includes a holder main body having a tapered tapered portion at a front portion, and the holder main body includes: A tapered hole portion of a desired length, which gradually narrows from the front end surface of the holder body toward the rear, is formed so as to coincide with the axis, and communicates with the rear end of the tapered hole portion and has a smaller diameter than the tapered hole portion. A hole is formed extending in the axial direction of the holder main body, and an intermediate hole opening from the rear end of the small-diameter hole to the rear end of the holder main body is formed to coincide with the axis of the holder main body. Cutting means is provided at the front end of the main body of the end mill, and a tapered shank portion of a desired length gradually narrowing toward the rear end is provided at the rear end of the main body of the end mill. A pressure contact surface, which is pressed against the front end surface of the holder main body, is formed concentrically with the shank portion on the rear end surface of the main body of the end mill, and is inserted into the small diameter hole from the rear end of the holder main body. A draw bolt is provided, and the holder main body is made of a material whose hardness and structure do not change.
There was usually heated to shrink below the fitting temperature temperature, after fitting the sheet <br/> Yanku portion of the end mill main the tapered hole of said holder body in this condition, after the draw bolt of the shank portion tightening up the contact face screwed into a female screw hole formed in the end is in close contact with the front end surface of the tapered portion
Characterized in that the end mill main body is fastened to the holder body by means of a shank integrated end mill. 【請求項２】 前記エンドミル主体のホルダ本体からの
抜き取りは、前記ホルダ本体を通常の焼き嵌め温度より
低い温度で加熱した状態で前記ドローボルトを緩め方向
に回転し、該ドローボルトをエンドミル主体側へ押圧す
ることにより行うように構成されていることを特徴とす
る請求項１記載のシャンク一体型エンドミル。2. The method according to claim 1, wherein the draw-bolt is removed from the holder main body by rotating the draw bolt in a loosening direction while the holder main body is heated at a temperature lower than a normal shrink fitting temperature. The shank-integrated end mill according to claim 1, wherein the end mill is configured to perform the pressing. 【請求項３】 主体を有するエンドミルと、このエンド
ミルを保持するエンドミルホルダを備えるシャンク一体
型エンドミルであって、 前記エンドミルホルダは前部に先細のテーパ部を有する
ホルダ本体を備え、 前記ホルダ本体には該ホルダ本体の前端面から後方に行
くに従い緩やかに細くなる所望長さのテーパ孔部が軸心
を一致して形成され、 前記テーパ孔部の後端に連通するめねじが前記ホルダ本
体に形成され、 前記エンドミルの主体の先端に切削手段が設けられ、 前記エンドミルの主体の後端に、後端に行くに従い緩や
かに細くなる所望長さのテーパ付きシャンク部が軸心を
一致して設けられ、 前記シャンク部の嵌入先端に前記めねじに螺合されるお
ねじ部が設けられ、 前記エンドミルの主体の後端面に前記ホルダ本体の前端
面に圧接される圧接面がシャンク部と同心円状に形成さ
れ、 前記ホルダ本体を材質の硬度及び組織が変わることのな
い通常の焼き嵌め温度より低い温度に加熱し、この状態
で該ホルダ本体のテーパ孔部に前記エンドミル主体のシ
ャンク部を嵌入し、かつ前記シャンク部のおねじ部を前
記テーパ孔部のめねじに螺合して前記圧接面が前記テー
パ部の前端面に密着されるまで締め付けることにより前
記エンドミル主体をホルダ本体に締結するように構成さ
れていることを特徴とするシャンク一体型エンドミル。3. A shank-integrated end mill including an end mill having a main body and an end mill holder for holding the end mill, wherein the end mill holder includes a holder main body having a tapered tapered portion at a front portion, and the holder main body includes: Is formed with a tapered hole of a desired length, which gradually narrows from the front end face of the holder body toward the rear, in alignment with the axis, and an internal thread communicating with the rear end of the tapered hole is formed in the holder body. Cutting means is provided at the leading end of the main body of the end mill, At the rear end of the main body of the end mill, a tapered shank portion having a desired length that gradually narrows toward the rear end is provided so as to coincide with the axis. A male screw portion to be screwed into the female screw is provided at a fitting end of the shank portion, and a rear end surface of the main body of the end mill is provided on a front end surface of the holder body. Contact face to be contact is formed in the shank portion and concentric, that I of the holder body material hardness and tissue changes
There was usually heated to shrink below the fitting temperature temperature, fitted shea <br/> Yanku portion of the end mill main the tapered hole of said holder body in this condition, and the tapered external threads of the shank portion before by tightening up the contact face screwed into the internal thread of the hole is in close contact with the front end surface of the tapered portion
A shank-integrated end mill, wherein the end mill main body is fastened to a holder body . 【請求項４】 前記エンドミル主体のホルダ本体からの
抜き取りは、前記ホルダ本体を通常の焼き嵌め温度より
低い温度で加熱した状態で前記シャンク部のおねじ部を
緩め方向に回転して外すことにより行うように構成され
ていることを特徴とする請求項３記載のシャンク一体型
エンドミル。4. The end mill is mainly removed from the holder main body by rotating and removing the external thread portion of the shank portion in a loosening direction while the holder main body is heated at a temperature lower than a normal shrink fitting temperature. The shank-integrated end mill according to claim 3, wherein the end mill is configured to perform the operation. 【請求項５】 前記エンドミルホルダのホルダ本体に、
前記ホルダ本体の前端面から前記エンドミルの先端に向
けクーラントなどの流体を噴出させる噴出孔を設けたこ
とを特徴とする請求項１または３記載のシャンク一体型
エンドミル。5. The holder body of the end mill holder,
The shank-integrated end mill according to claim 1 or 3, wherein an ejection hole for ejecting a fluid such as a coolant from a front end surface of the holder body toward a tip of the end mill is provided. 【請求項６】 前記噴出孔に流体噴出方向を変更する噴
出角度変更部材を設けたことを特徴とする請求項５記載
のシャンク一体型エンドミル。6. An end mill integrated with a shank according to claim 5, wherein an ejection angle changing member for changing a fluid ejection direction is provided in said ejection hole. 【請求項７】 前記エンドミルの主体の先端部にスロー
アウェイ式のボールチップからなる切削手段が着脱可能
に装着されることを特徴とする請求項１または３記載の
シャンク一体型エンドミル。7. A shank-integrated end mill according to claim 1, wherein a cutting means comprising a throw-away type ball tip is detachably attached to a leading end portion of the main body of the end mill. 【請求項８】 前記通常の焼き嵌め温度より低い温度は
材質の硬度、組織を変えない２００℃以下の温度である
ことを特徴とする請求項１または３記載のシャンク一体
型エンドミル。8. The integrated shank end mill according to claim 1, wherein the temperature lower than the normal shrink fitting temperature is a temperature of 200 ° C. or less which does not change the hardness and structure of the material.
JP03743899A 1999-02-16 1999-02-16 Integrated shank end mill Expired - Fee Related JP3196170B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP03743899A JP3196170B2 (en) 1999-02-16 1999-02-16 Integrated shank end mill
US09/487,416 US6394466B1 (en) 1999-02-16 2000-01-20 End mill chucking structure
EP00300960A EP1029620B1 (en) 1999-02-16 2000-02-08 Chuck
DE60045831T DE60045831D1 (en) 1999-02-16 2000-02-08 feed
KR1020000006362A KR100621952B1 (en) 1999-02-16 2000-02-11 End mill chucking structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03743899A JP3196170B2 (en) 1999-02-16 1999-02-16 Integrated shank end mill

Publications (2)

Publication Number Publication Date
JP2000233312A JP2000233312A (en) 2000-08-29
JP3196170B2 true JP3196170B2 (en) 2001-08-06

Family

ID=12497529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03743899A Expired - Fee Related JP3196170B2 (en) 1999-02-16 1999-02-16 Integrated shank end mill

Country Status (1)

Country Link
JP (1) JP3196170B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20122881U1 (en) * 2001-07-25 2009-02-19 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Tool for finishing valve seat and guide
DE112006000779T5 (en) * 2005-03-29 2008-02-07 Hanita Metal Works Ltd. Schrumpfpassungswerkzeughalter
DE102006028408A1 (en) 2006-04-10 2007-10-31 Franz Haimer Maschinenbau Kg Tool holder has tool holding fixture, preferably chuck, where shank of a tool particularly rotary tool, is accommodated in tool holding fixture
DE202011109498U1 (en) 2011-12-27 2012-02-13 Franz Haimer Maschinenbau Kg Tool holder and clamping system with such a tool holder
US8192116B2 (en) * 2009-06-01 2012-06-05 Kvk Industries, Llc Lathe-mounted tool-holder
US20150289956A1 (en) * 2012-11-29 2015-10-15 Gc Corporation Method for manufacturing one-piece dental implant

Also Published As

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