JPS6315096B2 - - Google Patents
Info
- Publication number
- JPS6315096B2 JPS6315096B2 JP57136224A JP13622482A JPS6315096B2 JP S6315096 B2 JPS6315096 B2 JP S6315096B2 JP 57136224 A JP57136224 A JP 57136224A JP 13622482 A JP13622482 A JP 13622482A JP S6315096 B2 JPS6315096 B2 JP S6315096B2
- Authority
- JP
- Japan
- Prior art keywords
- tool
- tool holder
- holder
- machining
- accuracy
- 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
Links
- 230000007246 mechanism Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 description 7
- 238000003801 milling Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
- B23Q1/38—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using fluid bearings or fluid cushion supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/10—Driving main working members rotary shafts, e.g. working-spindles driven essentially by electrical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Turning (AREA)
- Jigs For Machine Tools (AREA)
Description
【発明の詳細な説明】
本発明は、工作機械の加工用工具ホルダの支持
機構に関するものである。そして、とくにエンド
ミル加工を主体とするマシニングセンターあるい
は汎用フライス工具ホルダに利用されるものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support mechanism for a processing tool holder of a machine tool. In particular, it is used in machining centers mainly used for end milling or general-purpose milling tool holders.
従来のマシニングセンターあるいはフライス加
工用工具ホルダは、第１図を参照しつつ説明する
と、テーパシヤンクの雌雄嵌合によつて、工具の
中心位置が定まり、工具の回転は摩擦力による回
転トルクの伝達によつて行なわれていた。 In a conventional machining center or milling tool holder, referring to Fig. 1, the center position of the tool is determined by the male and female fitting of the taper shank, and the rotation of the tool is determined by the transmission of rotational torque by frictional force. It was carried out at the same time.
図中、工具９に保持する工具ホルダ２は、工具
ホルダ支持具６にテーパ付孔嵌合で取付けられ、
抜け止め具７で工具ホルダ２が工作機械本体のハ
ウジング１から抜け出ないようになつていた。そ
して工具ホルダ支持具６は、その外周部が、軸受
８，８で支持され、外部駆動モータＭによつて、
伝達ギヤＧ１、工具ホルダ支持具６に固定された
ギヤＧ２を介して回転され、さらに工具ホルダ２
を介して工具９が回転されていた。 In the figure, the tool holder 2 held by the tool 9 is attached to the tool holder support 6 by fitting into a tapered hole,
A stopper 7 prevents the tool holder 2 from coming out of the housing 1 of the machine tool body. The tool holder support 6 has its outer circumferential portion supported by bearings 8, 8, and is driven by an external drive motor M.
It is rotated via a transmission gear G1 and a gear G2 fixed to the tool holder support 6, and further the tool holder 2
The tool 9 was being rotated through.
上記のような工具ホルダの支持構造によると、
テーパシヤンク自体は、嵌合精度が悪く、カツタ
ーフレが数ミクロン以下におさえられないし、工
具の先端位置の狂いなどを生じ、10ミクロンをこ
えるため、インジエクシヨンモールド型加工のよ
うに、三次元加工を行なう場合など、高い精度の
加工が期待できなかつた。 According to the support structure of the tool holder as described above,
The taper shank itself has poor fitting accuracy, and the cutter runout cannot be suppressed to less than a few microns, and it also causes misalignment of the tip of the tool, which exceeds 10 microns. In some cases, high precision machining could not be expected.
また、工具変換を行なつたとき、工具自体の回
転中心からの偏荷重が保証できないため、高速回
転をすると、振動が発生し、それゆえ高速回転さ
せることができない。 Further, when changing the tool, it is not possible to guarantee an eccentric load from the center of rotation of the tool itself, so if the tool rotates at high speed, vibration will occur, and therefore high speed rotation cannot be achieved.
さらに、上記従来例以外のベルト駆動、ギヤ駆
動などを用いる場合でも、駆動モータから工具軸
までの伝達機構が長くなつたり、複雑な機構とな
つたりして、伝達機構の各部分から生ずる振動発
生がさけられない。 Furthermore, even when using a belt drive, gear drive, etc. other than the conventional examples mentioned above, the transmission mechanism from the drive motor to the tool shaft becomes long or complicated, and vibrations are generated from each part of the transmission mechanism. I can't avoid it.
本発明は、上述従来例の欠点を除去し、工具プ
リセツトは静的精度のみに限定されず、ロータと
して動バランスを考慮した工具プリセツトを可能
とし、工具交換に伴う誤差が0.1ミクロン程度に
おさえられ、粗加工から仕上加工に移る段階で、
工具交換を行なつても、削りしろが一定値におさ
えられるようにして加工精度を向上させ、また、
普通の複雑な伝動機構をなくして機械構成が単純
化されるとともに伝動機構の誤差、摩耗、熱によ
る精度劣化、および振動による騒音、工具寿命の
低下などの問題をなくした工作機械の加工用工具
ホルダの支持機構を提供することを目的とする。 The present invention eliminates the drawbacks of the above-mentioned conventional examples, and enables tool presetting that takes into account the dynamic balance of the rotor, rather than being limited to static accuracy, and allows the error associated with tool exchange to be suppressed to about 0.1 micron. , at the stage of moving from rough machining to finishing machining,
Improves machining accuracy by keeping the machining allowance at a constant value even when changing tools, and
A processing tool for machine tools that simplifies the machine configuration by eliminating the usual complicated transmission mechanism, and also eliminates problems such as errors in the transmission mechanism, wear, accuracy deterioration due to heat, noise due to vibration, and shortened tool life. The purpose is to provide a support mechanism for a holder.
以下、本発明の実施例を図面にもとづいて説明
する。 Embodiments of the present invention will be described below based on the drawings.
第２図に示す一実施例は、機械本体に固定され
たハウジング部１内に、工具９を保持しかつ回転
駆動される工具ホルダ２を流体軸受部３ａ，３ｂ
で支持するとともに、工具ホルダ２を回転するた
めに、回転子部５ａを工具ホルダ２に設け、固定
子部５ｂをハウジング部１に設けて電動回転駆動
装置（ビルトインモーター）を構成し、また工具
ホルダ２がハウジングから抜け出さないように保
持するために磁石４ａ，４ｂを設けてある。 In one embodiment shown in FIG. 2, a tool 9 is held in a housing part 1 fixed to a machine body, and a tool holder 2 which is rotatably driven is placed in fluid bearing parts 3a and 3b.
In order to support the tool holder 2 and rotate the tool holder 2, a rotor part 5a is provided on the tool holder 2, and a stator part 5b is provided in the housing part 1 to constitute an electric rotation drive device (built-in motor). Magnets 4a and 4b are provided to hold the holder 2 so that it does not slip out of the housing.
工具９を交換する場合、工具ホルダ２に新らし
い別の工具９を取付け、動バランスを取つた工具
ホルダ２をハウジング１内に挿入する。工具ホル
ダ２には挿入し易くするために先端に球面部２ａ
が形成してある。流体軸受部３ａ，３ｂには高圧
空気をその供給路Ａを通じて給気するようになつ
ている。図中供給路Ａ中の矢印は給気方向を示し
ている。軸受材料はセラミツク、グラフアイトな
どの多孔質材を用いる。工具ホルダ２の重量およ
び軸受３ｂと工具ホルダ２のフランジ部２ｂとの
間に発生するスラスト力をバランスさせるため磁
石４ａ，４ｂが設けられ工具ホルダ２の抜け止め
を防止している。なお、ビルトインタイプのモー
タとして高周波モータ、DCホールモータなどの
構成を採用することも可能である。 When replacing the tool 9, a new tool 9 is attached to the tool holder 2, and the dynamically balanced tool holder 2 is inserted into the housing 1. The tool holder 2 has a spherical part 2a at the tip to facilitate insertion.
is formed. High-pressure air is supplied to the fluid bearing sections 3a and 3b through a supply path A thereof. The arrow in the supply path A in the figure indicates the air supply direction. The bearing material used is porous material such as ceramic or graphite. In order to balance the weight of the tool holder 2 and the thrust force generated between the bearing 3b and the flange portion 2b of the tool holder 2, magnets 4a and 4b are provided to prevent the tool holder 2 from coming off. Note that it is also possible to adopt a configuration such as a high frequency motor or a DC Hall motor as a built-in type motor.
第３図に示す他の実施例は、第２図の実施例の
磁石を用いる代りに、工具ホルダ２を機械的に保
持する例である。供給路A′を通じて高圧空気が
供給される流体軸受部３ｃを有する一対の支持部
材４ｃ，４ｃにより工具ホルダ２のフランジ部２
ｂにおいて、工具ホルダ２の重量およびスラスト
力を支持している。該支持部材４ｃ，４ｃは、工
具ホルダ２を挿脱するとき、図中矢印Ｆの方向に
あるいは逆方向に摺動することができるようにな
つている。 Another embodiment shown in FIG. 3 is an example in which the tool holder 2 is held mechanically instead of using the magnet of the embodiment shown in FIG. The flange portion 2 of the tool holder 2 is supported by a pair of support members 4c, 4c having a fluid bearing portion 3c to which high-pressure air is supplied through the supply path A'.
b supports the weight and thrust force of the tool holder 2. The support members 4c, 4c can slide in the direction of arrow F in the figure or in the opposite direction when the tool holder 2 is inserted or removed.
第４図に示す別の実施例は、工具ホルダ２に半
球面膨大部１０を形成して、ハウジング部１側に
凹球面状をなす流体軸受３ｂで軸支し、工具軸に
かかるモーメント力を向上させ、上方に磁石４ａ
を設けたところに特徴のある工具ホルダの変形例
を示す。工具軸にモーメント力がかかつた時、球
面全面で受けるので、片当りもなく、抗力が向上
する。 In another embodiment shown in FIG. 4, a hemispherical enlarged portion 10 is formed in the tool holder 2, and the tool holder 2 is supported by a fluid bearing 3b having a concave spherical surface on the housing portion 1 side, thereby reducing the moment force applied to the tool shaft. Raise the magnet 4a upward
A modified example of the tool holder is shown in which the feature is provided. When a moment force is applied to the tool axis, it is received by the entire spherical surface, so there is no uneven contact and the resistance is improved.
第５図ないし第７図に示す実施例は、それぞれ
上記第２図ないし第４図に示す実施例に対して軸
部にテーパを付けた形状の工具ホルダ２を用いた
変形例を示してあり、これらは工具ホルダ２の取
付、取外を容易にしたものである。 The embodiments shown in FIGS. 5 to 7 are modifications of the embodiments shown in FIGS. 2 to 4, respectively, using a tool holder 2 having a tapered shaft portion. , these facilitate attachment and detachment of the tool holder 2.
本発明は、以上説明したように、工具ホルダ自
体を流体軸受で直接支持した構成とすることによ
つて、工具の回転精度が向上し、また、高圧空気
を流しているので、細かいゴミが混入せず、工具
交換時の工具位置精度の再現性が向上する。さら
に、工具を含めた回転体をバランシングマシンに
かけることにより動バランスを工作機械外で取れ
るので、高速回転に伴う振動を予め制限すること
ができる。 As explained above, the present invention has a structure in which the tool holder itself is directly supported by a fluid bearing, thereby improving the rotational accuracy of the tool.Also, since high-pressure air is flowing, fine dust cannot be mixed in. This improves the reproducibility of tool position accuracy when changing tools. Furthermore, since the dynamic balance can be taken outside the machine tool by subjecting the rotating body including the tool to a balancing machine, vibrations associated with high-speed rotation can be limited in advance.
また、直接工具ホルダを回転するため、従来の
ように伝達機構の構成要素による振動、熱の発生
あるいは効率ダウンの発生がなく、機械装置とし
てユニツト化をはかることができる効果がある。 Furthermore, since the tool holder is directly rotated, there is no vibration, generation of heat, or reduction in efficiency caused by the components of the transmission mechanism as in the prior art, and there is an advantage that the mechanical device can be integrated into a unit.
さらに、本発明によれば上述の工具の回転精度
の向上に関して次の効果がある。 Further, according to the present invention, the following effects can be achieved regarding the improvement of the rotation accuracy of the tool described above.
本発明は、工具を保持しかつ回転駆動される工
具ホルダを流体軸受によつて支持することによ
り、工具ホルダに工具を保持する前に工具と工具
ホルダを一体物として回転偏心を調整してから工
具ホルダを流体軸受に支持させたので、流体軸受
に支持した工具及び工具ホルダは回転偏心が解消
され支持機構に対して工具の回転精度が向上し
た。それゆえ、第１図に示す従来例のテーパ嵌合
の場合には工具と工具ホルダの回転偏心の調整後
に工具ホルダを工具ホルダ支持具とテーパ嵌合さ
せるので、工具と工具ホルダの偏心調整を行つて
もテーパ嵌合の精度の限界があり、工具の振れが
発生し工具加工精度の向上が期待できなかつたの
に比べ、工具の回転精度がより向上できる。 In the present invention, by supporting a tool holder that holds a tool and is rotationally driven by a fluid bearing, the rotational eccentricity of the tool and the tool holder is adjusted as a single unit before the tool is held in the tool holder. Since the tool holder is supported by the hydrodynamic bearing, rotational eccentricity of the tool and the tool holder supported by the hydrodynamic bearing is eliminated, and the rotation accuracy of the tool with respect to the support mechanism is improved. Therefore, in the case of the conventional taper fitting shown in Fig. 1, the tool holder is tapered fitted to the tool holder support after adjusting the rotational eccentricity between the tool and the tool holder. Even if this method is used, there is a limit to the accuracy of taper fitting, and tool run-out occurs, and no improvement in tool machining accuracy can be expected, but the rotational accuracy of the tool can be further improved.
第１図は従来例の工作機械における加工用工具
ホルダの支持機構断面図、第２図は本発明に係る
工作機械の加工用工具ホルダの支持機構一実施例
の要部断面図、第３図ないし第７図は、それぞれ
他の実施例の要部断面図である。
２……工具ホルダ、３ａ，３ｂ，３ｃ……流体
軸受、４ａ，４ｂ……磁石、４ｃ……支持部材、
５ａ……電動回転駆動装置の回転子部、５ｂ……
電動回転駆動装置の固定子部、９……工具、Ａ，
A′……高圧空気供給路。
FIG. 1 is a cross-sectional view of a support mechanism for a machining tool holder in a conventional machine tool, FIG. 2 is a cross-sectional view of essential parts of an embodiment of the support mechanism for a machining tool holder in a machine tool according to the present invention, and FIG. 7 to 7 are sectional views of main parts of other embodiments. 2... Tool holder, 3a, 3b, 3c... Fluid bearing, 4a, 4b... Magnet, 4c... Support member,
5a... Rotor section of the electric rotation drive device, 5b...
Stator part of electric rotation drive device, 9...tool, A,
A'...High pressure air supply path.
Claims (1)
の支持機構において、流体軸受により前記工具ホ
ルダを支持するようにしたことを特徴とする加工
用工具ホルダの支持機構。 ２ 前記工具ホルダに前記流体軸受から供給され
る加圧流体を受ける面を複数設け、前記受け面に
より受ける圧力方向が互いに反対方向に向くよう
に構成したことを特徴とする特許請求の範囲第１
項記載の加工用工具ホルダの支持機構。[Scope of Claims] 1. A support mechanism for a processing tool holder that holds a tool and is rotatably driven, characterized in that the tool holder is supported by a fluid bearing. 2. Claim 1, characterized in that the tool holder is provided with a plurality of surfaces for receiving pressurized fluid supplied from the fluid bearing, and the directions of pressure received by the receiving surfaces are directed in opposite directions.
The support mechanism for the machining tool holder described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57136224A JPS5930634A (en) | 1982-08-06 | 1982-08-06 | Machining tool holder for machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57136224A JPS5930634A (en) | 1982-08-06 | 1982-08-06 | Machining tool holder for machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5930634A JPS5930634A (en) | 1984-02-18 |
| JPS6315096B2 true JPS6315096B2 (en) | 1988-04-02 |
Family
ID=15170191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57136224A Granted JPS5930634A (en) | 1982-08-06 | 1982-08-06 | Machining tool holder for machine tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5930634A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0345690U (en) * | 1989-09-13 | 1991-04-26 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63107502U (en) * | 1986-12-26 | 1988-07-11 | ||
| DE3763835D1 (en) * | 1987-04-17 | 1990-08-23 | Ibm Deutschland | DRILLING UNIT. |
| JP4711044B2 (en) * | 2004-06-10 | 2011-06-29 | 国立大学法人横浜国立大学 | Spindle device, processing device and measuring device |
| ES2293775B1 (en) * | 2005-06-10 | 2009-08-07 | Loxin 2002, S.L. | ADDITION TO THE PANTENT 200202399 FOR "TOOL HOLDER WITH ASPIRATION SYSTEM". |
| JP2009248224A (en) * | 2008-04-03 | 2009-10-29 | Waida Seisakusho:Kk | Method of mounting rotary tool, rotary tool, machine tool, and apparatus for mounting rotary tool |
| CN110405230A (en) * | 2018-04-26 | 2019-11-05 | 御成工业有限公司 | Main axle structure |
| CN112475955A (en) * | 2020-11-24 | 2021-03-12 | 厦门艺琉如机械有限公司 | Crashproof cutter anchor clamps that digit control machine tool was used |
-
1982
- 1982-08-06 JP JP57136224A patent/JPS5930634A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0345690U (en) * | 1989-09-13 | 1991-04-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5930634A (en) | 1984-02-18 |
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