JPH07308809A - Rotational machining device - Google Patents

Rotational machining device

Info

Publication number
JPH07308809A
JPH07308809A JP12431794A JP12431794A JPH07308809A JP H07308809 A JPH07308809 A JP H07308809A JP 12431794 A JP12431794 A JP 12431794A JP 12431794 A JP12431794 A JP 12431794A JP H07308809 A JPH07308809 A JP H07308809A
Authority
JP
Japan
Prior art keywords
tool holder
shank portion
peripheral surface
core member
wedge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12431794A
Other languages
Japanese (ja)
Inventor
Haruaki Kubo
治明 久保
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.)
Daishowa Seiki Co Ltd
Original Assignee
Daishowa Seiki 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 Daishowa Seiki Co Ltd filed Critical Daishowa Seiki Co Ltd
Priority to JP12431794A priority Critical patent/JPH07308809A/en
Publication of JPH07308809A publication Critical patent/JPH07308809A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
    • B23B2231/0296—Ends of conical shanks, e.g. pull studs, tangs

Landscapes

  • Jigs For Machine Tools (AREA)
  • Gripping On Spindles (AREA)

Abstract

PURPOSE:To provide a rotational machining device which is able to prevent the movement of a tool holder in the direction of insertion or destruction of a dynamic balance even in high speed rotation. CONSTITUTION:In a rotational machining device 10 provided with a tool holder 12 for holding a rotational tool, a main spindle 14 in which an insertion hole for insertion/attachment of a shank part 18 of the tool holder is formed, and a drawing-in mechanism 19 for drawing the tool holder 12 into the insertion hole of the main spindle 14, a shank part 20 of the tool holder is provided with a shank part main body that is almost hollow and cylindrical and a core member 18 the outer surface of which is engaged with the inner surface of the shank part main body and which is connected to the drawing-in mechanism 19. In addition, a wedge means 31 is prepared between the outer surface of the core member 18 and the inner surface of the shank part main body, so that the shank part 20 expands in the radial direction due to wedge action when the core member 18 is drawn in by the drawing-in mechanism 19.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、回転工具を把持する工
具ホルダと、工具ホルダが挿着可能な挿入孔が形成され
た主軸と、を備えた回転加工装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary machining apparatus provided with a tool holder for holding a rotary tool and a spindle having an insertion hole into which the tool holder can be inserted.

【０００２】[0002]

【従来の技術】従来から、ドリル、エンドミル等の工具
を使用して行う加工作業は、工具を把持する工具ホルダ
と、この工具ホルダを回転する主軸本体と、から構成さ
れる回転加工装置によって行われている。この回転加工
装置の主軸本体には、通常工具ホルダが挿入可能な挿入
孔が形成されており、工具ホルダをこの挿入方向に付勢
し、工具ホルダの外周面を挿入孔の内周面に密着させる
ことにより、工具ホルダを主軸本体に装着させている。2. Description of the Related Art Conventionally, a machining operation using a tool such as a drill or an end mill is performed by a rotary machining apparatus composed of a tool holder for holding the tool and a main spindle body for rotating the tool holder. It is being appreciated. The spindle body of this rotary machining device is usually formed with an insertion hole into which the tool holder can be inserted.The tool holder is biased in this insertion direction, and the outer peripheral surface of the tool holder comes into close contact with the inner peripheral surface of the insertion hole. By doing so, the tool holder is attached to the main spindle body.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、近年、
工具の高速回転による加工が要求され、この高速回転に
より生じる遠心力により、主軸本体は、半径方向外側に
広がり、工具ホルダの挿入孔の内径は大きくなり、種々
の問題が生じることが判明した。すなわち、これまで低
速回転時には充分に密着していた工具ホルダと挿入孔と
の間に隙間が生じる。この際、工具ホルダは挿入孔に挿
入するよう付勢されているので、工具ホルダはこの付勢
方向に移動する。この結果、高速回転においては、工具
ホルダは長手方向に移動するため、加工深さに変化が生
じ、精度の高い加工ができなくなる。また、この高速回
転が終わると挿入孔の内径がもとに戻るため、工具ホル
ダが主軸本体に食い込み、工具ホルダが主軸から抜けな
くなるという問題が生じる。However, in recent years,
It has been found that machining by high-speed rotation of the tool is required, the centrifugal force generated by this high-speed rotation causes the main spindle body to expand outward in the radial direction, and the inner diameter of the insertion hole of the tool holder increases, causing various problems. That is, there is a gap between the tool holder and the insertion hole, which have been in close contact with each other at low speed rotation. At this time, since the tool holder is biased to be inserted into the insertion hole, the tool holder moves in this biasing direction. As a result, during high-speed rotation, the tool holder moves in the longitudinal direction, resulting in a change in the working depth, which makes it impossible to perform highly accurate working. Further, when this high-speed rotation ends, the inner diameter of the insertion hole returns to its original value, so that there is a problem that the tool holder bites into the main spindle body and the tool holder cannot be removed from the main spindle.

【０００４】また、工具ホルダの外周面の周方向にフラ
ンジを形成し、このフランジを主軸本体に当接させるこ
とにより、工具ホルダの挿入方向への移動を防止するこ
とも可能である。しかし、この場合も主軸本体の膨張に
より工具ホルダと主軸の挿入孔との間に隙間が生じるた
め、高速回転時に動バランスがくずれ、振動が発生し危
険な状態となる可能性がある。It is also possible to prevent the tool holder from moving in the inserting direction by forming a flange on the outer peripheral surface of the tool holder and bringing this flange into contact with the main spindle body. However, in this case as well, a gap is created between the tool holder and the insertion hole of the spindle due to the expansion of the spindle body, so that the dynamic balance may be lost during high-speed rotation, and vibration may occur, resulting in a dangerous state.

【０００５】そこで、本発明は以上の問題点を解決する
ためになされたものであり、高速回転時においても工具
ホルダの挿入方向への移動あるいは動バランスのくずれ
等を防止できる回転加工装置を提供することを目的とす
る。Therefore, the present invention has been made to solve the above problems, and provides a rotary machining apparatus capable of preventing movement of the tool holder in the insertion direction or loss of dynamic balance even during high-speed rotation. The purpose is to do.

【０００６】[0006]

【課題を解決するための手段】以上の目的を達成するた
め、本発明は回転工具を把持する工具ホルダと、工具ホ
ルダのシャンク部が挿着可能な挿入孔が形成された主軸
と、工具ホルダを主軸の挿入孔内へ引き込む引き込み機
構と、を備えた回転加工装置において、工具ホルダのシ
ャンク部は、略中空円筒状のシャンク部本体と、該シャ
ンク部本体の内周面に係合する外周面を有するととも
に、前記引き込み機構に連結された芯部材と、を備え、
芯部材の外周面とシャンク部本体の内周面の間には、芯
部材が引き込み機構により引き込まれることにより、く
さび作用でシャンク部を径方向に拡大させるくさび手段
が設けられていることを特徴とするものである。くさび
手段として、例えば芯部材の外周面とシャンク部本体の
内周面に、芯部材が引き込み機構により引き込まれるこ
とにより、くさび作用でシャンク部を径方向に拡大させ
るくさび当接面を形成されること、また芯部材の外周面
とシャンク部本体の内周面の間に、芯部材が引き込み機
構により引き込まれることにより、くさび作用でシャン
ク部を径方向に拡大させるくさび部材を設けること等が
ある。In order to achieve the above object, the present invention provides a tool holder for holding a rotary tool, a spindle having an insertion hole into which a shank portion of the tool holder can be inserted, and a tool holder. And a pulling mechanism for pulling the shank into the insertion hole of the main shaft, the shank portion of the tool holder includes a shank portion main body having a substantially hollow cylindrical shape, and an outer circumference engaging with an inner peripheral surface of the shank portion main body. A core member having a surface and connected to the retracting mechanism,
Between the outer peripheral surface of the core member and the inner peripheral surface of the shank portion main body, there is provided wedge means for expanding the shank portion in a radial direction by a wedge action by retracting the core member by a retracting mechanism. It is what As the wedge means, for example, a wedge contact surface is formed on the outer peripheral surface of the core member and the inner peripheral surface of the shank portion main body by the retracting mechanism to retract the core member to radially expand the shank portion by a wedge action. In addition, a wedge member may be provided between the outer peripheral surface of the core member and the inner peripheral surface of the shank portion main body so that the core member is retracted by the retracting mechanism to expand the shank portion in the radial direction by a wedge action. .

【０００７】また、くさび手段は、工具ホルダのシャン
ク部の略全長に亘り形成されていること、さらには、工
具ホルダのシャンク部の略全長に亘り、複数箇所に略均
等に形成されていることが好ましい。なお、くさび手段
は、工具ホルダのシャンク部に部分的に形成されていて
も良い。Further, the wedge means is formed over substantially the entire length of the shank portion of the tool holder, and further, is formed over a substantially entire length of the shank portion of the tool holder at a plurality of locations substantially evenly. Is preferred. The wedge means may be partially formed on the shank portion of the tool holder.

【０００８】芯部材外周面のくさび当接面は、雄ねじ状
に形成され、シャンク部本体内周面のくさび当接面は、
該雄ねじに係合する雌ねじ状に形成されているか、ある
いは芯部材外周面のくさび当接面は、軸方向に連続する
凹凸であって、各凹凸により前記引き込み機構による引
き込み方向に向かって下り勾配となる複数の斜面が形成
され、シャンク部本体内周面のくさび当接面は、前記芯
部材のくさび当接面と相補する凹凸であることが好まし
い。さらに、芯部材外周面のくさび当接面は、前記引き
込み機構による引き込み方向に向かって下り勾配となる
単数の斜面が形成され、シャンク部本体内周面のくさび
当接面は、前記芯部材のくさび当接面と相補する斜面で
あっても良い。The wedge contact surface of the outer peripheral surface of the core member is formed in a male screw shape, and the wedge contact surface of the inner peripheral surface of the shank portion main body is
It is formed in the shape of a female screw that engages with the male screw, or the wedge contact surface of the outer peripheral surface of the core member is a concavo-convex pattern that is continuous in the axial direction. It is preferable that a plurality of inclined surfaces are formed, and the wedge contact surface of the inner peripheral surface of the shank portion main body is unevenness complementary to the wedge contact surface of the core member. Further, the wedge contact surface of the outer peripheral surface of the core member is formed with a single slope having a downward slope in the retracting direction by the retracting mechanism, and the wedge contact surface of the inner peripheral surface of the shank portion main body is It may be an inclined surface complementary to the wedge contact surface.

【０００９】工具ホルダのシャンク部本体は、その外径
が前記引き込み方向に向かって先細りとなるテーパ状に
形成され、主軸の挿入孔内周はこれに相補するテーパ状
に形成されているか、あるいは、その外径が軸方向に亘
って略同一であることが好ましい。The shank portion main body of the tool holder is formed in a taper shape in which the outer diameter tapers in the pull-in direction, and the inner circumference of the spindle insertion hole is formed in a taper shape complementary thereto. It is preferable that the outer diameters thereof are substantially the same in the axial direction.

【００１０】さらに、工具ホルダには、半径方向外方に
突出するフランジが形成されており、該フランジの前記
引き込み方向の側面は、前記主軸の端面に密着すること
が好ましい。Further, it is preferable that the tool holder is formed with a flange protruding outward in the radial direction, and a side surface of the flange in the pull-in direction is in close contact with an end surface of the spindle.

【００１１】[0011]

【作用】以上のような構成により、主軸の高速回転によ
り挿入孔の内径が大きくなり、シャンク部本体の外周面
と挿入孔の内周面との間に隙間が生じた場合、芯部材が
引き込み機構により引き込まれ、くさび作用によりシャ
ンク部本体が径方向に拡大するので、シャンク部本体の
外周面と挿入孔の内周面が密着した状態を維持できる。With the above configuration, when the inner diameter of the insertion hole becomes large due to the high speed rotation of the main shaft and a gap is created between the outer peripheral surface of the shank portion main body and the inner peripheral surface of the insertion hole, the core member is pulled in. The shank portion main body is drawn in by the mechanism and expands in the radial direction by the wedge action, so that the outer peripheral surface of the shank portion main body and the inner peripheral surface of the insertion hole can be kept in close contact with each other.

【００１２】くさび当接面をシャンク部の略全長に亘り
形成することにより、シャンク部の略全長に亘り挿入孔
の内周面と密着することができる。また、当接面を複数
箇所に均等に形成することにより、芯部材の僅かな引き
込みによってシャンク部を径方向に拡大させることがで
きる。By forming the wedge contact surface over substantially the entire length of the shank portion, it is possible to make close contact with the inner peripheral surface of the insertion hole over substantially the entire length of the shank portion. Further, by uniformly forming the contact surfaces at a plurality of positions, the shank portion can be enlarged in the radial direction by slightly retracting the core member.

【００１３】フランジの側面を主軸の端面に密着させる
ことにより、工具ホルダの挿入方向への移動を容易に防
止することができる。By closely contacting the side surface of the flange with the end surface of the spindle, the movement of the tool holder in the inserting direction can be easily prevented.

【００１４】[0014]

【実施例】次に本発明の実施例について図に基づいて説
明する。図１は、本発明に係わる回転加工装置１０の長
手方向に沿った断面図である。この回転加工装置１０
は、主としてドリル、エンドミル等の工具を把持する工
具ホルダ１２と、この工具ホルダ１２を回転可能に把持
する主軸本体１４と、から構成されている。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a sectional view taken along the longitudinal direction of a rotary processing device 10 according to the present invention. This rotation processing device 10
Is mainly composed of a tool holder 12 for gripping a tool such as a drill and an end mill, and a spindle main body 14 for rotatably gripping the tool holder 12.

【００１５】工具ホルダ１２は、基端方向（図１の右方
向）に向かって先細りになるようテーパ状に形成された
シャンク部２０と、半径方向外方に突出するフランジ部
２２と、工具を把持するチャック機構を備えた先端部２
３と、から構成されている。このフランジ部２２の基端
側端面は主軸本体１４の先端側端面に密接するよう形成
されている。シャンク部２０は、略中空円筒状のシャン
ク部本体２１と、該シャンク部本体の内周面に係合する
外周面を有するとともに、後述する引き込み機構１９に
連結された芯部材１８と、を備えている。この芯部材１
８の外周面には、工具ホルダ１２の内周面に形成された
雌ねじ２４に係合するよう雄ねじ２６が形成されてい
る。The tool holder 12 has a shank portion 20 which is formed in a taper shape so as to taper toward a base end direction (right direction in FIG. 1), a flange portion 22 which protrudes outward in the radial direction, and a tool. Tip 2 with chuck mechanism for gripping
3 and. The proximal end surface of the flange portion 22 is formed so as to be in close contact with the distal end surface of the main spindle body 14. The shank portion 20 includes a shank portion main body 21 having a substantially hollow cylindrical shape, and an outer peripheral surface that engages with an inner peripheral surface of the shank portion main body, and a core member 18 connected to a retracting mechanism 19 described later. ing. This core member 1
A male screw 26 is formed on the outer peripheral surface of 8 so as to engage with a female screw 24 formed on the inner peripheral surface of the tool holder 12.

【００１６】芯部材１８は、主として円柱状に形成され
た円柱部２８と、前記雄ねじ２６が形成されたねじ部３
２と、前記引き込み機構１９に連結する連結部３６と、
から構成されている。この雄ねじ２６は、前記引き込み
機構１９の引き込み方向に向かって下がり勾配となる当
接面３１を有している。一方、雌ねじ２４は、前記当接
面３１と相補して、前記引き込み方向に向かって上り勾
配となる当接面３３を有している。また、この雄ねじ２
６は、シャンク部２０の略全長に亘り形成され、これに
より当接面３１、３３がシャンク部２０の略全長に亘り
複数箇所に均等に形成されていることになる。連結部３
６は、シャンク部本体２１の内径より大きい径を有する
フランジ３８と、このフランジ３８から突出し、円柱状
に形成された支柱部４０と、この支柱部４０より径を大
きくする頭部４２と、から構成されている。なお、図１
において符号４４はキーであり、このキー４４が工具ホ
ルダ１２に形成された孔４６に挿設され、芯部材１８の
円柱部２８に形成された凹部４８に遊びをもって挿入さ
れることにより、芯部材１８が工具ホルダ１２に組み付
けられている。The core member 18 has a cylindrical portion 28 formed mainly in a cylindrical shape and a screw portion 3 formed with the male screw 26.
2, and a connecting portion 36 for connecting to the retracting mechanism 19,
It consists of The male screw 26 has an abutment surface 31 that is inclined downward in the pulling direction of the pulling mechanism 19. On the other hand, the female screw 24 has a contact surface 33 which is complementary to the contact surface 31 and has an upward slope in the drawing direction. Also, this male screw 2
6 is formed over substantially the entire length of the shank portion 20, so that the contact surfaces 31, 33 are evenly formed at a plurality of locations over the substantially entire length of the shank portion 20. Connection part 3
Reference numeral 6 indicates a flange 38 having a diameter larger than the inner diameter of the shank portion main body 21, a columnar columnar portion 40 protruding from the flange 38, and a head portion 42 having a diameter larger than the columnar column 40. It is configured. Note that FIG.
Reference numeral 44 denotes a key, and the key 44 is inserted into a hole 46 formed in the tool holder 12 and is inserted into a recess 48 formed in the columnar portion 28 of the core member 18 with play, so that the core member is formed. 18 is attached to the tool holder 12.

【００１７】主軸本体１４には、工具ホルダ１２が挿入
できるよう挿入孔５０が形成されており、この挿入孔５
０の内周面は、前記工具ホルダ１２のシャンク部２０の
テーパ面が当接するようテーパ状に形成されている。挿
入孔５０の基端側には、テーパ面の先端より径を大きく
する空洞５２が形成されており、この空洞５２の最基端
側には、前記引き込み機構１９が装着されている。引き
込み機構１９は、前記連結部３６の頭部４２を狭持する
コレット３４と、このコレット３４を工具ホルダ１２の
挿入方向に付勢する板ばね６２と、を備えている。コレ
ット３４は、円筒状に形成されており、その底面部には
開口部５４が形成されている。また、コレット３４の上
面側の端部には、半径方向内側に突出するよう突部５６
が周方向に形成されており、この突部５６によって、前
記頭部４２が狭持される。開口部５４には、コレット３
４の取付ねじ５８が挿入されており、この取付ねじ５８
の頭部の裏面には前記板ばね６２の座金６０が設けられ
ている。前記連結部３６の頭部４２が、コレット３４に
狭持された際、工具ホルダ１２は、芯部材１８を介し
て、主軸本体１４の挿入方向に引き込まれている。An insertion hole 50 is formed in the main spindle body 14 so that the tool holder 12 can be inserted therein.
The inner peripheral surface of 0 is tapered so that the tapered surface of the shank portion 20 of the tool holder 12 abuts. A cavity 52 having a diameter larger than that of the tip of the tapered surface is formed on the proximal end side of the insertion hole 50, and the retracting mechanism 19 is mounted on the most proximal end side of the cavity 52. The retracting mechanism 19 includes a collet 34 that holds the head 42 of the connecting portion 36, and a leaf spring 62 that biases the collet 34 in the insertion direction of the tool holder 12. The collet 34 is formed in a cylindrical shape, and an opening 54 is formed in the bottom surface thereof. The upper end of the collet 34 has a protrusion 56 so as to protrude inward in the radial direction.
Are formed in the circumferential direction, and the head portion 42 is held by the protrusion 56. In the opening 54, the collet 3
4 mounting screw 58 is inserted.
The washer 60 of the leaf spring 62 is provided on the back surface of the head of the. When the head portion 42 of the connecting portion 36 is clamped by the collet 34, the tool holder 12 is pulled in the inserting direction of the main spindle body 14 via the core member 18.

【００１８】次に本実施例の使用状態について説明す
る。先ず、主軸本体１４が回転しない状態においては、
板ばね６２によって芯部材１８が基端方向に引き込まれ
ており、これにより、工具ホルダ１２のテーパ面が挿入
孔５０の内周面に密着し、工具ホルダ１２は主軸本体１
４に固定される。次に、主軸本体１４を回転することに
より、工具ホルダ１２等に把持された工具を回転させ
る。この主軸本体１４の回転が高速になると、図２に示
すように、遠心力が生じ、これによって主軸本体１４の
挿入孔が半径方向外方に広がり、その内径が大きくな
る。これにより、工具ホルダ１２のシャンク部２０のテ
ーパ面と挿入孔５０の内周面との間に隙間が生じるが、
芯部材１８が基端方向に引き込まれ、両当接面３１と３
３のくさび効果によりシャンク部本体が径方向外方に押
圧され、よって工具ホルダ１２のシャンク部の外周面は
外方向に広がるので、工具ホルダ１２のテーパ面が挿入
孔５０の内周面に密着した状態を保つことができる。Next, the usage state of this embodiment will be described. First, in the state where the main spindle body 14 does not rotate,
The core member 18 is pulled in the proximal direction by the leaf spring 62, whereby the tapered surface of the tool holder 12 is brought into close contact with the inner peripheral surface of the insertion hole 50, and the tool holder 12 is attached to the spindle main body 1
It is fixed at 4. Next, by rotating the spindle main body 14, the tool held by the tool holder 12 or the like is rotated. When the spindle body 14 rotates at high speed, a centrifugal force is generated as shown in FIG. 2, which causes the insertion hole of the spindle body 14 to expand radially outward and its inner diameter to increase. As a result, a gap is created between the tapered surface of the shank portion 20 of the tool holder 12 and the inner peripheral surface of the insertion hole 50.
The core member 18 is pulled in the proximal direction, and both contact surfaces 31 and 3
Since the shank part body is pressed radially outward by the wedge effect of No. 3, the outer peripheral surface of the shank part of the tool holder 12 spreads outward, so that the tapered surface of the tool holder 12 closely contacts the inner peripheral surface of the insertion hole 50. You can keep the condition.

【００１９】以上のように本実施例によれば、高速回転
の時であっても工具ホルダ１２のテーパ面が挿入孔５０
の内周面に密着した状態を保つことができるので、動バ
ランスのくずれ等を防止することができる。また、本実
施例においては、前記フランジ部２２の基端側端面は、
主軸本体１４の先端側端面に当接するよう形成されてい
るので、工具ホルダ１２が主軸本体１４に対して長手方
向に移動することはない。さらに、本実施例において
は、前記当接面３１、３３が工具ホルダ１２のシャンク
部２０の略全長に亘って形成されているので、工具ホル
ダ１２のテーパ面全面は、主軸本体１４の挿入孔５０の
内周面全面を押圧することができる。As described above, according to this embodiment, the tapered surface of the tool holder 12 is inserted into the insertion hole 50 even during high speed rotation.
Since it can be kept in close contact with the inner peripheral surface of the, it is possible to prevent the loss of dynamic balance and the like. Further, in this embodiment, the end face on the base end side of the flange portion 22 is
Since the tool holder 12 is formed so as to come into contact with the end face of the main spindle body 14, the tool holder 12 does not move in the longitudinal direction with respect to the main spindle body 14. Further, in the present embodiment, since the contact surfaces 31, 33 are formed over substantially the entire length of the shank portion 20 of the tool holder 12, the entire tapered surface of the tool holder 12 is the insertion hole of the main spindle body 14. The entire inner peripheral surface of 50 can be pressed.

【００２０】なお、本実施例においては、芯部材１８の
外周面とシャンク部本体の内周面にねじ形状のくさび当
接面を形成したが、これに限定する必要はなく、例えば
図３に示すように芯部材１８には軸方向に連続する凹凸
６４であって各凹凸により前記引き込み方向に向かって
下り勾配となる複数の当接面を形成し、シャンク部本体
にはこれに相補する凹凸６６を形成しても良い。この
際、芯部材を周方向に僅かに回動させた際に、凹凸６４
及び６６は、図４に示すように、周方向について間欠的
に設けられ、両者の組み付けを容易にしている。すなわ
ち、凹凸６４と凹凸６６が干渉しないように、芯部材１
８を工具ホルダ１２に挿入し、芯部材１８を周方向にず
らすことにより、芯部材１８を工具ホルダ１２に装着す
ることができる。In this embodiment, the screw-shaped wedge contact surfaces are formed on the outer peripheral surface of the core member 18 and the inner peripheral surface of the shank portion main body, but the invention is not limited to this and, for example, as shown in FIG. As shown in the figure, the core member 18 is formed with a concavo-convex pattern 64 which is continuous in the axial direction, and each concavo-convex pattern forms a plurality of abutting surfaces having a downward slope in the pull-in direction. 66 may be formed. At this time, when the core member is slightly rotated in the circumferential direction, the unevenness 64
As shown in FIG. 4, 66 and 66 are provided intermittently in the circumferential direction to facilitate the assembly of both. That is, the core member 1 is so arranged that the unevenness 64 and the unevenness 66 do not interfere with each other.
The core member 18 can be attached to the tool holder 12 by inserting 8 into the tool holder 12 and shifting the core member 18 in the circumferential direction.

【００２１】また、本実施例においては、芯部材とシャ
ンク部本体の間に複数のくさび当接面を形成したが、例
えば芯部材の外周面を基端方向に向かって比較的急な勾
配で先細りになるようテーパ状に形成し、工具ホルダ１
２の内設孔２４をこのテーパ面が当接するようテーパ状
に形成しても上記実施例と同様な効果が得られる。さら
に、本実施例においては、シャンク部外周をテーパ状に
形成したが、これに限定する必要はなく、例えばその外
径が軸方向に亘って略同一になるよう形成しても良い。Further, in this embodiment, a plurality of wedge contact surfaces are formed between the core member and the shank portion main body. For example, the outer peripheral surface of the core member is relatively steep toward the base end direction. Tool holder 1 that is tapered to taper
Even if the second inner hole 24 is formed in a tapered shape so that the tapered surface is in contact with the second inner hole 24, the same effect as in the above embodiment can be obtained. Further, in the present embodiment, the outer periphery of the shank portion is formed in a tapered shape, but it is not limited to this, and for example, the outer diameter may be formed to be substantially the same in the axial direction.

【００２２】図５は、工具ホルダ１２の第３実施例を示
したものである。この工具ホルダ１２のシャンク部本体
２１の内周面には、螺旋状の第１溝６８が周設されてお
り、芯部材１８の外周面には、前記第１溝に対向するよ
う螺旋状の第２溝７０が周設されている。この第１及び
第２溝６８、７０の間には、くさび部材７２が連続的に
介装されている。すなわち、第１溝６８と、第２溝７０
と、くさび部材７２と、によりくさび作用が生じること
になる。FIG. 5 shows a third embodiment of the tool holder 12. The shank part main body 21 of the tool holder 12 is provided with a spiral first groove 68 on the inner peripheral surface thereof, and the core member 18 is provided on the outer peripheral surface thereof with a spiral groove facing the first groove. The second groove 70 is provided around. A wedge member 72 is continuously interposed between the first and second grooves 68, 70. That is, the first groove 68 and the second groove 70.
And the wedge member 72 causes a wedge action.

【００２３】次にこの工具ホルダ１２が備えられた回転
装置１０の使用状態について説明する。上記実施例と同
様に主軸本体１４の高速回転すると、主軸本体１４の挿
入孔の内径が大きくなり、芯部材１８が基端方向に引き
込まれる。これにより、第１溝６８の基端側の面と第２
溝７０の先端側の面との間に、球状のくさび部材７２が
喰い込み、シャンク部本体が径方向外方に押圧され、工
具ホルダ１２のテーパ面が挿入孔の内周面に密着した状
態を保つことができる。Next, a usage state of the rotating device 10 provided with the tool holder 12 will be described. When the main spindle body 14 rotates at high speed as in the above-described embodiment, the inner diameter of the insertion hole of the main spindle body 14 increases, and the core member 18 is pulled in the proximal direction. Thereby, the surface of the first groove 68 on the base end side and the second groove 68
A spherical wedge member 72 bites between the groove 70 and the surface on the tip side, the shank portion body is pressed radially outward, and the tapered surface of the tool holder 12 is in close contact with the inner peripheral surface of the insertion hole. Can be kept.

【００２４】図６及び図７は、工具ホルダ１２の第４の
実施例を示したものである。この工具ホルダ１２のシャ
ンク部本体２１の内周面には、周方向に溝７４が複数列
形成されており、芯部材１８の外周面には、前記溝７４
に対向するように半球状の凹部７６が周方向に適宜間隔
をおいて形成されている。この溝７４及び凹部７６の間
には、球状のくさび部材７２が介装されている。また、
図８に示すように、シャンク部本体２１に内周面には、
長手方向に逃し溝７８が形成されており、これによって
芯部材１８を工具ホルダ１２に挿入し、芯部材１８を周
方向にずらすことにより、芯部材１８を工具ホルダ１２
に装着することができる。6 and 7 show a fourth embodiment of the tool holder 12. A plurality of rows of grooves 74 are circumferentially formed on the inner peripheral surface of the shank portion main body 21 of the tool holder 12, and the groove 74 is formed on the outer peripheral surface of the core member 18.
Hemispherical recesses 76 are formed at appropriate intervals in the circumferential direction so as to face each other. A spherical wedge member 72 is interposed between the groove 74 and the recess 76. Also,
As shown in FIG. 8, on the inner peripheral surface of the shank portion main body 21,
A relief groove 78 is formed in the longitudinal direction, whereby the core member 18 is inserted into the tool holder 12 and the core member 18 is displaced in the circumferential direction, so that the core member 18 is moved.
Can be attached to.

【００２５】[0025]

【発明の効果】以上のように本発明によれば、高速回転
時においても工具ホルダの挿入方向への移動あるいは動
バランスのくずれ等を防止できる工具ホルダと主軸本体
の回転加工装置を提供することができる。As described above, according to the present invention, it is possible to provide a tool holder and a spindle main body rotation processing apparatus capable of preventing the tool holder from moving in the inserting direction or losing the dynamic balance even during high speed rotation. You can

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

【図１】本発明の実施例に係わる回転加工装置の長手方
向に沿った断面図である。FIG. 1 is a cross-sectional view taken along the longitudinal direction of a rotary processing device according to an embodiment of the present invention.

【図２】図１の使用状態を示す図である。FIG. 2 is a diagram showing a usage state of FIG.

【図３】本発明に係わる他の実施例を示す断面図であ
る。FIG. 3 is a sectional view showing another embodiment according to the present invention.

【図４】芯部材の斜視図である。FIG. 4 is a perspective view of a core member.

【図５】工具ホルダの他の実施例を示す断面図である。FIG. 5 is a sectional view showing another embodiment of the tool holder.

【図６】工具ホルダの他の実施例を示す断面図である。FIG. 6 is a sectional view showing another embodiment of the tool holder.

【図７】芯部材の斜視図である。FIG. 7 is a perspective view of a core member.

【図８】図６のＶＩＩＩ−ＶＩＩＩ線に沿った断面図で
ある。8 is a cross-sectional view taken along the line VIII-VIII in FIG.

【符号の説明】[Explanation of symbols]

１０ 回転加工装置 １２ 工具ホルダ １４ 主軸本体 １８ 芯部材 １９ 引き込み機構 ２０ シャンク部 ３１ 当接面（くさび手段） 10 Rotation Processing Device 12 Tool Holder 14 Spindle Main Body 18 Core Member 19 Retracting Mechanism 20 Shank Part 31 Contact Surface (Wedge Means)

Claims (12)

【特許請求の範囲】[Claims] 【請求項１】 回転工具を把持する工具ホルダと、工具
ホルダのシャンク部が挿着可能な挿入孔が形成された主
軸と、工具ホルダを主軸の挿入孔内へ引き込む引き込み
機構と、を備えた回転加工装置において、工具ホルダの
シャンク部は、略中空円筒状のシャンク部本体と、該シ
ャンク部本体の内周面に係合する外周面を有するととも
に、前記引き込み機構に連結された芯部材と、を備え、
芯部材の外周面とシャンク部本体の内周面の間には、芯
部材が引き込み機構により引き込まれることにより、く
さび作用でシャンク部を径方向に拡大させるくさび手段
が設けられている回転加工装置。1. A tool holder for holding a rotary tool, a main shaft having an insertion hole into which a shank portion of the tool holder can be inserted, and a drawing mechanism for drawing the tool holder into the insertion hole of the main shaft. In the rotary machining apparatus, the shank portion of the tool holder has a substantially hollow cylindrical shank portion main body, an outer peripheral surface that engages with an inner peripheral surface of the shank portion main body, and a core member that is connected to the retracting mechanism. ,,
A rotary machining device is provided between the outer peripheral surface of the core member and the inner peripheral surface of the shank portion main body, wherein the core member is retracted by a retracting mechanism, and wedge means for radially expanding the shank portion by a wedge action is provided. . 【請求項２】 前記芯部材の外周面とシャンク部本体の
内周面には、芯部材が引き込み機構により引き込まれる
ことにより、くさび作用でシャンク部を径方向に拡大さ
せるくさび当接面が形成されている請求項１記載の回転
加工装置。2. A wedge abutment surface is formed on the outer peripheral surface of the core member and the inner peripheral surface of the shank portion main body so that the core member is retracted by a retracting mechanism so that the shank portion is radially expanded by a wedge action. The rotary processing apparatus according to claim 1, which is provided. 【請求項３】 前記芯部材の外周面とシャンク部本体の
内周面の間には、芯部材が引き込み機構により引き込ま
れることにより、くさび作用でシャンク部を径方向に拡
大させるくさび部材が設けられている請求項１記載の回
転加工装置。3. A wedge member is provided between the outer peripheral surface of the core member and the inner peripheral surface of the shank portion main body so that the core member is retracted by a retracting mechanism to expand the shank portion in the radial direction by a wedge action. The rotary processing device according to claim 1, which is provided. 【請求項４】 くさび手段は、工具ホルダのシャンク部
の略全長に亘り形成されている請求項１記載の回転加工
装置。4. The rotary machining apparatus according to claim 1, wherein the wedge means is formed over substantially the entire length of the shank portion of the tool holder. 【請求項５】 くさび手段は、工具ホルダのシャンク部
に部分的に形成されている請求項１記載の回転加工装
置。5. The rotary machining apparatus according to claim 1, wherein the wedge means is partially formed on the shank portion of the tool holder. 【請求項６】 くさび手段は、工具ホルダのシャンク部
の略全長に亘り、複数箇所に略均等に形成されている請
求項４記載の回転加工装置。6. The rotary machining apparatus according to claim 4, wherein the wedge means is formed substantially evenly at a plurality of positions over substantially the entire length of the shank portion of the tool holder. 【請求項７】 芯部材外周面のくさび当接面は、雄ねじ
状に形成され、シャンク部本体内周面のくさび当接面
は、該雄ねじに係合する雌ねじ状に形成されている請求
項２記載の回転加工装置。7. The wedge contact surface of the outer peripheral surface of the core member is formed in a male screw shape, and the wedge contact surface of the inner peripheral surface of the shank portion main body is formed in a female screw shape that engages with the male screw. The rotary processing device according to 2. 【請求項８】 芯部材外周面のくさび当接面は、軸方向
に連続する凹凸であって、各凹凸により前記引き込み機
構による引き込み方向に向かって下り勾配となる複数の
斜面が形成され、シャンク部本体内周面のくさび当接面
は、前記芯部材のくさび当接面と相補する凹凸である請
求項２記載の回転加工装置。8. The wedge contact surface on the outer peripheral surface of the core member is a concavo-convex pattern that is continuous in the axial direction, and each concavo-convex pattern forms a plurality of slopes that are downwardly inclined toward the retracting direction of the retracting mechanism. The rotary machining apparatus according to claim 2, wherein the wedge contact surface of the inner peripheral surface of the main body is uneven to be complementary to the wedge contact surface of the core member. 【請求項９】 芯部材外周面のくさび当接面は、前記引
き込み機構による引き込み方向に向かって下り勾配とな
る単数の斜面が形成され、シャンク部本体内周面のくさ
び当接面は、前記芯部材のくさび当接面と相補する斜面
である請求項２記載の回転加工装置。9. The wedge contact surface of the outer peripheral surface of the core member is formed with a single slope having a downward slope toward the retracting direction by the retracting mechanism, and the wedge contact surface of the inner peripheral surface of the shank portion main body is The rotary machining apparatus according to claim 2, wherein the rotary member is an inclined surface complementary to the wedge contact surface of the core member. 【請求項１０】 工具ホルダのシャンク部本体は、その
外径が前記引き込み方向に向かって先細りとなるテーパ
状に形成され、主軸の挿入孔内周はこれに相補するテー
パ状に形成されている請求項１記載の回転加工装置。10. The shank part main body of the tool holder is formed in a taper shape whose outer diameter tapers in the pull-in direction, and the inner circumference of the insertion hole of the main shaft is formed in a complementary taper shape. The rotary processing device according to claim 1. 【請求項１１】 工具ホルダのシャンク部本体は、その
外径が軸方向に亘って略同一である請求項１記載の回転
加工装置。11. The rotary machining apparatus according to claim 1, wherein the shank portion main body of the tool holder has substantially the same outer diameter in the axial direction. 【請求項１２】 工具ホルダには、半径方向外方に突出
するフランジが形成されており、該フランジの前記引き
込み方向の側面は、前記主軸の端面に密着する請求項１
記載の回転加工装置。12. The tool holder is formed with a flange projecting outward in the radial direction, and a side surface of the flange in the pull-in direction is in close contact with an end surface of the spindle.
The described rotary processing device.
JP12431794A 1994-05-13 1994-05-13 Rotational machining device Pending JPH07308809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12431794A JPH07308809A (en) 1994-05-13 1994-05-13 Rotational machining device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12431794A JPH07308809A (en) 1994-05-13 1994-05-13 Rotational machining device

Publications (1)

Publication Number Publication Date
JPH07308809A true JPH07308809A (en) 1995-11-28

Family

ID=14882344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12431794A Pending JPH07308809A (en) 1994-05-13 1994-05-13 Rotational machining device

Country Status (1)

Country Link
JP (1) JPH07308809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9943912B2 (en) 2011-12-27 2018-04-17 Franz Haimer Maschinenbau Kg Tool holder and method for producing a tool receiving portion for such a tool holder
US10710171B1 (en) * 2019-04-26 2020-07-14 Shin-Yain Industrial Co., Ltd. Cutter holder with retention knob

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9943912B2 (en) 2011-12-27 2018-04-17 Franz Haimer Maschinenbau Kg Tool holder and method for producing a tool receiving portion for such a tool holder
US10967437B2 (en) 2011-12-27 2021-04-06 Franz Haimer Maschinenbau Kg Tool holder and clamping system
US10710171B1 (en) * 2019-04-26 2020-07-14 Shin-Yain Industrial Co., Ltd. Cutter holder with retention knob

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