JP2010172985A - Composite turning cutting machine of cylindrical workpiece - Google Patents

Composite turning cutting machine of cylindrical workpiece Download PDF

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JP2010172985A
JP2010172985A JP2009016095A JP2009016095A JP2010172985A JP 2010172985 A JP2010172985 A JP 2010172985A JP 2009016095 A JP2009016095 A JP 2009016095A JP 2009016095 A JP2009016095 A JP 2009016095A JP 2010172985 A JP2010172985 A JP 2010172985A
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turning
turning cutting
workpiece
cylindrical workpiece
pair
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Tadao Arai
忠雄 荒井
Tetsuyuki Watanabe
哲行 渡邊
Akira Ito
暁 伊藤
Tomio Kubo
富美夫 久保
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Okamoto Machine Tool Works Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly accurate two-head cylinder grinder with nano-accuracy as a composite turning cutting machine of a cylindrical workpiece having a pair of turning cutting tools that are a combination of the same kinds of turning cutting tools or a combination of different kinds of turning cutting tools of tools selected from a grindstone, a drill, and a turning cutting blade. <P>SOLUTION: In the composite turning cutting machine for carrying out end-face polishing, inner surface taper cutting, and the polishing of the cylindrical workpiece from both ends by using a two-head turning cutting tool, a turning cutting tool shaft device 10 is used which includes a rotatable/linearly movable built-in motor drive type turning cutting tool shaft 13 pivoted by a magnetic bearing and a hydrostatic water bearing as the turning cutting tool shaft device, rotating/linearly moving composite actuators 16, 18 for rotating/linearly moving the turning cutting tool shaft, and a position measurement means 85 for measuring the linear moving distance of the turning cutting tool shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、双頭ツール主軸装置を用いて円筒状ワークの両端、あるいは内面を同時に機械加工できる円筒状ワークの複合旋削加工機に関する。具体的には、磁気軸受と静圧水軸受により軸受けされる回転/直動可能なビルトインモータ駆動式の砥石軸を備える一対の砥石頭と、前記砥石頭を円筒状ワーク側に移動させる一対のツール移動台と、円筒状ワークを回転自在に緊結するワーク支持機構と、前記円筒状ワークの軸心方向に対する前記砥石軸の位置(X座標)を検出する一対の位置センサと、前記ワーク支持機構を前記円筒状ワークの軸心方向に対し直角方向(Z座標)に移動させるワーク移動台と、を備える複合円筒内面研削装置に関する。この複合円筒内面研削装置は、円筒状ワークの両端側から一対の砥石によりワーク筒内面およびワーク端面を同時に成形加工できる。本発明の複合施削加工機は、鋼管、アルミニウム管、石管、エンジニアリングプラスチック管、セラミック製管の円筒状ワークの端面研磨加工、端面テーパー加工、内面ねじ切り加工、内面平滑成形加工に適している。   The present invention relates to a cylindrical workpiece complex turning machine capable of simultaneously machining both ends or an inner surface of a cylindrical workpiece using a double-head tool spindle device. Specifically, a pair of grindstone heads equipped with a built-in motor-driven grindstone shaft that is supported by a magnetic bearing and a hydrostatic water bearing, and a pair of wheels that move the grindstone head to the cylindrical workpiece side. A tool moving base; a work support mechanism that rotatably binds the cylindrical work; a pair of position sensors that detect a position (X coordinate) of the grindstone shaft with respect to the axial direction of the cylindrical work; and the work support mechanism And a workpiece moving table that moves the workpiece in a direction perpendicular to the axial direction of the cylindrical workpiece (Z coordinate). This composite cylindrical inner surface grinding apparatus can simultaneously mold and work the workpiece cylinder inner surface and the workpiece end surface with a pair of grindstones from both ends of the cylindrical workpiece. The composite machining machine of the present invention is suitable for end face polishing, end face taper, inner surface threading and inner surface smooth forming of cylindrical workpieces such as steel pipes, aluminum pipes, stone pipes, engineering plastic pipes, and ceramic pipes. .

内面研削装置は知られている。例えば、図2に示すように、2頭のパラレルツールスピンドルにより投付穴、端面、テーパー、外周加工を段取り替えなしで機械加工できる2ツール軸仕様の内面研削装置が株式会社岡本工作機械製作所より内面研削盤IGM15NC(商品名)の機種銘で市販されている(例えば、非特許文献1参照。)。   Internal grinding devices are known. For example, as shown in Fig. 2, Okamoto Machine Tool Manufacturing Co., Ltd. has an internal grinding machine with two tool axes that can machine the throwing hole, end face, taper, and outer circumference without changing the setup with two parallel tool spindles. It is commercially available under the model name of the internal grinding machine IGM15NC (trade name) (for example, see Non-Patent Document 1).

また、図3に示すように、研削磁気軸受と静圧空気軸受により軸受けされるビルトインモータ駆動式の砥石軸を備える砥石頭と、砥石軸のラジアル方向(Y軸方向)の圧力を検知する圧力センサと、前記砥石頭を円筒状ワーク側に移動させるツール移動台と、円筒状ワークを回転自在に3爪チャックで緊結するワーク支持機構と、前記ワーク支持機構を前記円筒状ワークの軸心方向に対し直角方向(Z座標)に移動させるワーク移動台と、を備える円筒内面研削装置も知られている。前記砥石軸は、砥石を先端に取付けたスピンドルを、静圧気体軸受と磁気軸受とが互いに兼用部分が生じるように複合化された静圧磁気複合軸受を介して、スピンドル装置本体に回転自在に設置し、前記スピンドルは、ラジアル軸受とアキシャル軸受とを介してスピンドル装置本体に設置し、前記ラジアル軸受を前記静圧磁気複合軸受としている(例えば、特許文献1参照。)。   In addition, as shown in FIG. 3, a grinding wheel head having a built-in motor drive type grinding wheel shaft supported by a grinding magnetic bearing and a hydrostatic air bearing, and a pressure for detecting pressure in the radial direction (Y-axis direction) of the grinding wheel shaft A sensor, a tool moving base for moving the grindstone head toward the cylindrical workpiece, a workpiece support mechanism for tightly fastening the cylindrical workpiece with a three-jaw chuck, and the workpiece support mechanism in the axial direction of the cylindrical workpiece There is also known a cylindrical inner surface grinding apparatus including a workpiece moving table that moves in a direction perpendicular to the Z direction (Z coordinate). The grindstone shaft is rotatable on the spindle device main body through a hydrostatic magnetic compound bearing in which a hydrostatic gas bearing and a magnetic bearing are combined so that a portion where both the hydrostatic gas bearing and the magnetic bearing are combined is generated. The spindle is installed in a spindle apparatus main body via a radial bearing and an axial bearing, and the radial bearing is used as the hydrostatic magnetic compound bearing (see, for example, Patent Document 1).

さらに、円筒状ワークの両端側から一対の旋削工具(砥石、刀具、ドリルなど)を用い、同時に円筒状ワークを機械加工する複合円筒研削盤や複合旋盤、複合ドリル加工・研削装置も提案されている。   Furthermore, composite cylindrical grinders, compound lathes, and composite drilling / grinding devices that simultaneously machine a cylindrical workpiece using a pair of turning tools (grinding stone, blade, drill, etc.) from both ends of the cylindrical workpiece have also been proposed. Yes.

例えば、図4に示すように、砥石軸101を備える一対の砥石頭100と、前記砥石頭を円筒状ワーク200側に移動させる一対のツール移動台102と、円筒状ワークを回転自在に緊結するワーク支持機構300と、前記ワーク支持機構を前記円筒状ワークの軸心方向に対し直角方向(Z座標)に移動させるワーク移動台301と、を備える複合円筒内面研削装置は知られている(例えば、特許文献2参照。)。   For example, as shown in FIG. 4, a pair of grindstone heads 100 provided with a grindstone shaft 101, a pair of tool moving bases 102 that move the grindstone heads toward the cylindrical workpiece 200, and the cylindrical workpiece are tightly coupled in a freely rotatable manner. A compound cylindrical inner surface grinding apparatus including a workpiece support mechanism 300 and a workpiece moving table 301 that moves the workpiece support mechanism in a direction perpendicular to the axial direction of the cylindrical workpiece (Z coordinate) is known (for example, , See Patent Document 2).

さらに、刃工具(フライス刃、ドリルなど)を備える一対の主軸装置と、前記主軸装置を円筒状ワーク側に移動させる一対のツール移動台と、円筒状ワークを3爪で緊結するワーク支持機構と、を備える複合旋盤も知られている(例えば、特許文献3、特許文献4および特許文献5参照。)。   Furthermore, a pair of spindle devices provided with blade tools (milling blades, drills, etc.), a pair of tool moving bases for moving the spindle device to the cylindrical workpiece side, and a workpiece support mechanism for fastening the cylindrical workpiece with three claws Are also known (see, for example, Patent Document 3, Patent Document 4, and Patent Document 5).

特開2000−24805号公報JP 2000-24805 A 中国実用新案公告第200988151号実用新型説明書China Utility Model Notice No. 200808151 Utility Model Manual 中国実用新案公告第201055294号実用新型説明書China Utility Model Notice No. 201005294 No.4 Utility Manual 中国実用新案公告第201076938号実用新型説明書China Utility Model Notice 20101076938 Utility Model Manual 中国実用新案公告第201076908号実用新型説明書China Utility Model Notice No. 2010106908 Utility New Model Manual

株式会社岡本工作機械製作所著、「製品案内−GRIND−X」カタログ、9頁、2008年1月3000部発行Published by Okamoto Machine Tool Co., Ltd., “Product Guide -GRIND-X” catalog, 9 pages, published January 3000, 2008

前記特許文献1に記載の磁気軸受と静圧空気軸受により軸受けされるビルトインモータ駆動式の砥石軸を備える砥石頭を備える研削装置は、砥石軸の高さ位置調整を供給する空気で行っており、高回転精度が得られている。しかし、左右方向の砥石位置の精度は移動台の移動距離で制御され、移動台の制御では、0.001mm(1μm)〜0.003mmまでの加工精度しか得られない。   The grinding device provided with a grinding wheel head provided with a built-in motor drive type grinding wheel shaft supported by a magnetic bearing and a hydrostatic air bearing described in Patent Document 1 is performed with air for adjusting the height position of the grinding wheel shaft. High rotational accuracy has been obtained. However, the accuracy of the position of the grindstone in the left-right direction is controlled by the moving distance of the moving table. With the control of the moving table, only machining accuracy of 0.001 mm (1 μm) to 0.003 mm can be obtained.

前記特許文献2乃至特許文献5に記載の複合旋削加工機は、円筒状ワークの両端側から一対のツール主軸を用いてワークの端面および内面を同時に機械加工できるので、ワークの軸心に振れがない加工製品を得ることができる利点を有する。   The compound turning machines described in Patent Document 2 to Patent Document 5 can simultaneously machine the end surface and the inner surface of the workpiece using a pair of tool spindles from both ends of the cylindrical workpiece, so that the workpiece center is shaken. Has the advantage that no processed product can be obtained.

しかし、前記特許文献2に記載されるように、この双頭主軸利用の同時複合研削加工機では高々0.003mm(3μm)までの加工精度しか得られていない。   However, as described in Patent Document 2, this simultaneous multiple grinding machine using a double-headed spindle can only achieve a machining accuracy of up to 0.003 mm (3 μm).

本願発明者等は、前記特許文献2乃至特許文献4に記載の双頭主軸の同時複合旋削加工機のツール主軸の軸受と駆動を、前記特許文献1に記載の磁気軸受と静圧空気軸受により軸受けされるビルトインモータ駆動式の砥石軸を採用することにより筒状ワークの加工精度を0.1〜0.5μmへと向上させることを試みたが、高々1μmまでしか加工精度は向上しなかった。   The inventors of the present application use a magnetic bearing and a hydrostatic air bearing described in Patent Document 1 as bearings for the tool spindle of the double-headed spindle simultaneous turning machine described in Patent Document 2 to Patent Document 4 and driving. Although an attempt was made to improve the processing accuracy of the cylindrical workpiece to 0.1 to 0.5 μm by adopting the built-in motor drive type grindstone shaft, the processing accuracy was improved only to 1 μm at most.

次に、本願発明者等は、静圧空気軸受を静圧水軸受構造に変更し、磁気軸受と静圧水軸受により軸受けされるビルトインモータ駆動式の砥石軸を採用するとともに、砥石軸の左右の0.1〜150mm長の大きい移動をツール軸移動台の左右移動で行い、砥石軸の左右の0.0001〜2mm長の小さい移動を磁気軸受で行うように設計したところ、円筒状ワークの加工精度が0.1〜0.5μmへと向上したことを見出し、本発明に到った。   Next, the inventors of the present application change the hydrostatic air bearing to a hydrostatic water bearing structure, adopt a built-in motor drive type grindstone shaft supported by a magnetic bearing and a hydrostatic water bearing, Is designed so that a large movement of 0.1 to 150 mm in length is performed by moving the tool axis moving table to the left and right, and a small movement of 0.0001 to 2 mm in length to the left and right of the grinding wheel axis is performed by a magnetic bearing. The present inventors have found that the processing accuracy is improved to 0.1 to 0.5 μm and have arrived at the present invention.

請求項1の発明は、磁気軸受と静圧流体軸受により軸受けされる回転/直動可能なビルトインモータ駆動式の旋削工具軸、および、前記旋削工具軸を直線方向に移動可能に固定するツール移動台よりなる一対の旋削ステージと、
前記一対の旋削ステージ間に設けられた円筒状ワークを回転自在に緊結するワーク支持機構と、
前記円筒状ワークの軸心方向に対する前記旋削工具軸の位置(X座標)を検出する一対の位置センサと、
前記ワーク支持機構を前記円筒状ワークの軸心方向に対し直角方向(Z座標)に移動させるワーク移動台と、
前記一対の旋削工具軸の軸心と円筒状ワークの軸心とを同一直線上に芯出しする位置決め機構とを備える円筒状ワークの複合旋削加工機において、
前記旋削ステージとして、磁気軸受と静圧水軸受により軸受けされる回転/直動可能なビルトインモータ駆動式の旋削工具軸、前記旋削工具軸を回転/直動させる回転/直動複合アクチュエータ、前記旋削工具軸の直線移動距離を測定する位置測定手段、および、前記旋削工具軸を直線方向に移動可能に固定する移動台よりなる一対の旋削ステージを用いることを特徴とする複合旋削加工機を提供するものである。
The invention of claim 1 is a rotary / linearly movable built-in motor drive type turning tool shaft supported by a magnetic bearing and a hydrostatic fluid bearing, and a tool movement for fixing the turning tool shaft to be movable in a linear direction. A pair of turning stages consisting of platforms,
A workpiece support mechanism for rotatably fastening a cylindrical workpiece provided between the pair of turning stages;
A pair of position sensors for detecting the position (X coordinate) of the turning tool axis with respect to the axial direction of the cylindrical workpiece;
A workpiece moving table for moving the workpiece support mechanism in a direction perpendicular to the axial direction of the cylindrical workpiece (Z coordinate);
In a cylindrical workpiece complex turning machine comprising a positioning mechanism for centering the axis of the pair of turning tool axes and the axis of the cylindrical workpiece on the same straight line,
As the turning stage, a built-in motor-driven turning tool shaft capable of rotation / linear movement supported by a magnetic bearing and a hydrostatic water bearing, a rotary / linear motion combined actuator for rotating / linearly moving the turning tool shaft, the turning Provided is a compound turning machine characterized by using a pair of turning stages comprising a position measuring means for measuring a linear movement distance of a tool axis and a moving stage for fixing the turning tool axis so as to be movable in a linear direction. Is.

請求項2の発明は、前記請求項1に記載の複合旋削加工機において、前記一対の旋削工具が砥石、ドリル、切削刃より選ばれた工具の同種の旋削工具の組み合わせまたは異種の旋削工具の組み合わせであることを特徴とする複合旋削加工機を提供するものである。   According to a second aspect of the present invention, there is provided the combined turning machine according to the first aspect, wherein the pair of turning tools is a combination of turning tools of the same type selected from a grindstone, a drill, or a cutting blade, or different types of turning tools. The present invention provides a compound turning machine characterized by being a combination.

旋削工具軸の直線方向の移動を、磁気軸受による0.1〜2,000μmの移動による被研削物への精密旋削加工と、旋削工具軸を直線方向に移動可能に固定するツール移動台のスライドウエイ利用の移動手段による被旋削物である円筒状ワーク端への接近および粗旋削加工切り込みの0.001〜1,000mmの移動に振り分けることにより、旋削工具の磨耗により生じる工具寸法ミクロンオーダーの減少の位置補正を位置センサで検出して磁気軸受により補償できるようにしたので、旋削加工された被旋削物の寸法精度が0.1〜0.5μmへと向上した。また、旋削工具軸の軸受構造として静圧水軸受を採用することにより環境に優しい複合旋削加工機とすることができるとともに、空気静圧よりも水静圧の方が旋削工具軸の動剛性を高めることができる。   Precise turning of the turning tool axis in the linear direction by moving 0.1 to 2,000 μm by magnetic bearings and sliding of the tool moving base that fixes the turning tool axis to be movable in the linear direction Reduction of tool size caused by wear of turning tool by micron order by allocating 0.001 to 1,000mm movement of cylindrical workpiece which is a workpiece to be turned by way moving using way Since the position correction is detected by the position sensor and can be compensated by the magnetic bearing, the dimensional accuracy of the turned workpiece is improved to 0.1 to 0.5 μm. In addition, by adopting a hydrostatic bearing as the bearing structure of the turning tool shaft, it is possible to make an environmentally friendly compound turning machine, and the hydrostatic pressure is more effective than the static air pressure. Can be increased.

複合旋削加工機の旋削工具軸装置構造を示す断面図である。It is sectional drawing which shows the turning tool shaft apparatus structure of a compound turning machine. 円筒状ワークの一端面側から双頭の旋削工具で旋削加工する複合内面研削盤の斜視図である。(公知)It is a perspective view of the compound internal grinding machine which turns with the double-headed turning tool from the one end surface side of a cylindrical workpiece. (Known) 磁気軸受と静圧気体軸受兼用の砥石軸を利用する円筒状ワークの内面研削盤の斜視図である。(公知)It is a perspective view of the internal-surface grinding machine of the cylindrical workpiece | work using the grindstone axis | shaft combined with a magnetic bearing and a static pressure gas bearing. (Known) 円筒状ワークの両端面側から双頭の旋削工具で旋削加工する複合内面研削盤の正面図である。(公知)It is a front view of the compound internal grinding machine which turns with the double-headed turning tool from the both end surface sides of a cylindrical workpiece. (Known)

以下、図面を用いて本発明をさらに詳細に説明する。図1は複合旋削加工機の砥石軸静圧水軸受と磁気軸受を併用した砥石軸装置の構造を示す断面図である。   Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a cross-sectional view showing the structure of a grindstone shaft device using a grindstone shaft hydrostatic bearing and a magnetic bearing in a combined turning machine.

図1に示す複合旋削加工機の砥石軸装置10は、磁気軸受と静圧水軸受により軸受けされる回転/直動可能な砥石軸13およびこの回転可能な砥石軸先端に砥石14を取り付けた研削頭(ヘッド)を有する。前記砥石軸13の後端には砥石軸直線移動方向の位置(X座標)を測定する位置測定手段85が設けられ、前記砥石軸13は直線移動可能なツール移動台に固定板6を介して固定されている。   A grindstone shaft device 10 of a composite turning machine shown in FIG. 1 is a grinding wheel shaft 13 that can be rotated / linearly supported by a magnetic bearing and a hydrostatic water bearing, and a grindstone in which a grindstone 14 is attached to the tip of the rotatable grindstone shaft. Has a head. Position measuring means 85 for measuring the position (X coordinate) in the direction of linear movement of the grindstone axis is provided at the rear end of the grindstone axis 13, and the grindstone axis 13 is placed on a tool movable table that can move linearly via a fixed plate 6. It is fixed.

この磁気軸受と静圧水軸受により軸受けされる回転/直動可能な砥石軸13には、砥石軸を回転/直動させる回転/直動複合アクチュエータ16,18が設置されている。 Rotation / linear motion combined actuators 16 and 18 for rotating / linearly moving the grindstone shaft are installed on the grindstone shaft 13 that is supported by the magnetic bearing and the hydrostatic water bearing.

砥石軸13は円筒状ハウジング15により囲繞され、砥石軸13の後方部は、静圧水ラジアル軸受される。円筒状ハウジング内壁には、水通路15eが設けられ、給水口15aより水は水通路15eへ供給される。円筒状ハウジング15内壁と砥石軸13外の間を流れて砥石軸13を冷却した水は、バキューム吸引管15bより排出される。基板研削終了後は、圧空供給口15cより加圧空気が供給され水通路15e内に残留する冷却水および水滴をドレン管15dより円筒状ハウジング15外へ放出する構造としている。   The grindstone shaft 13 is surrounded by a cylindrical housing 15, and the rear portion of the grindstone shaft 13 is hydrostatically supported by a radial hydrostatic bearing. A water passage 15e is provided on the inner wall of the cylindrical housing, and water is supplied from the water supply port 15a to the water passage 15e. The water that flows between the inner wall of the cylindrical housing 15 and the outside of the grindstone shaft 13 and cools the grindstone shaft 13 is discharged from the vacuum suction pipe 15b. After the substrate grinding is finished, pressurized air is supplied from the compressed air supply port 15c, and cooling water and water droplets remaining in the water passage 15e are discharged from the cylindrical housing 15 through the drain pipe 15d.

砥石軸13の中央部には、砥石軸13を回転させる前記ビルトインモータ16が設置され、前記円筒状ハウジング15に設けられた冷却液導入パイプ15fより供給された冷却液が円筒状ハウジング15内壁に設けられた冷却液流路15hを通って排出管15gへ導かれる。   The built-in motor 16 for rotating the grindstone shaft 13 is installed at the center of the grindstone shaft 13, and the coolant supplied from the coolant introduction pipe 15 f provided in the cylindrical housing 15 is applied to the inner wall of the cylindrical housing 15. It is guided to the discharge pipe 15g through the provided coolant flow path 15h.

前記円筒状ハウジング15の素材としては、炭化珪素、窒化珪素、酸化珪素、アルミナ、ジルコニアなどのセラミックが好ましいが、従来のステンレスあるいはクロムメッキ鋼製スピンドル表面をセラミック化学蒸着で100〜500μm厚コーティングしたものでもよい。   The material of the cylindrical housing 15 is preferably ceramic such as silicon carbide, silicon nitride, silicon oxide, alumina, zirconia, etc., but the surface of a conventional stainless steel or chrome plated steel spindle is coated with a thickness of 100 to 500 μm by ceramic chemical vapor deposition. It may be a thing.

前記ラジアル軸受される下方部室とビルトインモータ16の冷却液室とは、リップシール15jによりそれぞれの室に供給される液体が混合しないよう区画されている。   The lower chamber, which is radially supported, and the coolant chamber of the built-in motor 16 are partitioned by the lip seal 15j so that the liquid supplied to the respective chambers does not mix.

砥石軸13の後方には、砥石軸13の上端に設けられたボールターゲット17の位置検出素子である位置センサ85を搭載し、可動子(永久磁石)18aを固定した砥石軸13を前後方向(y軸方向)に0.01〜2,000μm程度移動させるためのコイル18bが設置されている。   A position sensor 85, which is a position detection element of the ball target 17 provided at the upper end of the grindstone shaft 13, is mounted behind the grindstone shaft 13, and the grindstone shaft 13 to which the mover (permanent magnet) 18a is fixed is moved in the front-rear direction ( A coil 18b for moving about 0.01 to 2,000 μm in the y-axis direction) is provided.

前記ビルトインモータ16で砥石軸13の回転を、可動子18aとコイル18bとの組み合わせのモータ18で砥石軸13の2.0m以下のスラスト直動を行うことができ、これらモータ16,18を合わせて回転/直線複合アクチュエータと呼ぶ。   The built-in motor 16 can rotate the grindstone shaft 13, and the motor 18, which is a combination of the mover 18 a and the coil 18 b, can perform a thrust linear motion of 2.0 m or less of the grindstone shaft 13. This is called a combined rotary / linear actuator.

複合旋削加工機の他のアッセンブリ装置、機器および部品である、ワーク移動台、円筒状ワークを回転自在に緊結するワーク支持機構、前記ワーク支持機構を前記円筒状ワークの軸心方向に対し直角方向(Z座標)に移動させるワーク移動台、および、前記一対の施削工具軸の軸心と円筒状ワークの軸心とを同一直線上に芯出しする位置決め機構(X軸−,Y軸−,Z軸−リニアースケールや記録部、位置座標データ演算部、軸移動距離演算部、駆動機構への移動距離指令部等を備える数値制御装置を含む)は、これまでに使用されている装置、機器および部品、例えば前記特許文献2に示される既知の製品を利用することができる。   Other assembly devices, devices and parts of a complex turning machine, such as a workpiece moving base, a workpiece support mechanism for fastening a cylindrical workpiece in a freely rotatable manner, and the workpiece support mechanism perpendicular to the axial direction of the cylindrical workpiece A workpiece moving table to be moved to (Z coordinate), and a positioning mechanism (X-axis, Y-axis,..., Centering the axis of the pair of cutting tool axes and the axis of the cylindrical workpiece on the same straight line. Z-axis-linear scale, recording unit, position coordinate data calculation unit, axis movement distance calculation unit, numerical control device including movement distance command unit to drive mechanism, etc.) And, for example, a known product shown in Patent Document 2 can be used.

被旋削加工物である円筒状ワークは、ワーク支持機構の3爪係止チャック機構の円筒状空間部に挿入され、3爪を円筒状ワークの外周面に移動、接触させることにより緊結される。ついで、ワーク支持機構を搭載するワーク移動台を前後方向に直線移動させ、前記一対の砥石軸の軸心と円筒状ワークの軸心とが同一直線上に位置する距離前後移動させ、芯出しを完了させ、ワーク位置および一対の旋削工具(砥石)位置を研削加工開始点位置(または待機位置)とする。   A cylindrical workpiece, which is a workpiece to be turned, is inserted into a cylindrical space portion of a three-jaw locking chuck mechanism of a workpiece support mechanism, and is fastened by moving and contacting the three claws to the outer peripheral surface of the cylindrical workpiece. Next, the workpiece moving table on which the workpiece supporting mechanism is mounted is linearly moved in the front-rear direction, and the center of the pair of grinding wheel shafts and the cylindrical workpiece is moved back and forth by a distance that is located on the same straight line. The workpiece position and the pair of turning tools (grinding stones) are set as the grinding start point position (or standby position).

旋削工具は、円筒状ワークの目的とする製品の機械加工に適した砥石、ドリル、切削刃より選ばれた工具の同種の旋削工具または異種の旋削工具の組み合わせで使用される。よって、一対とも砥石を用いて管体の両端面を研磨加工、あるいは管体の内面を同時にテーパー加工研削、溝切加工、研磨加工する。また、砥石と切削刃を用い、砥石で管体の一方の端面を研磨加工、あるいは管体の内面をテーパー加工研削、溝切加工、研磨加工し、切削刃で他方の端や内面に溝切加工を同時に行う。さらに、砥石とドリルを用い、砥石で管体の一方の端面を研磨加工、あるいは管体の内面をテーパー加工研削、溝切加工、研磨加工し、ドリルで管体の他方内面に穿孔加工や溝切加工を同時に行うことができる。   The turning tool is used in the same kind of turning tool selected from grindstones, drills and cutting blades suitable for machining of the target product of the cylindrical workpiece, or a combination of different turning tools. Accordingly, both ends of the tube body are polished using a grindstone, or the inner surface of the tube body is simultaneously subjected to taper grinding, grooving, and polishing. Also, using a grindstone and a cutting blade, grind one end surface of the tube with a grindstone, or taper grinding, grooving, and polishing the inner surface of the tube, and grooving the other end or inner surface with a cutting blade. Processing at the same time. Furthermore, using a grindstone and a drill, one end face of the tube body is polished with a grindstone, or the inner surface of the tube body is tapered, grooved, polished, and drilled or grooved on the other inner surface of the tube body with a drill. Cutting can be performed simultaneously.

円筒状ワークの旋削加工は、数値制御装置のメモリー部に記憶された加工プログラムに従って、数値制御装置の記録部に記録される距離や位置座標を基に演算される移動距離データや位置座標データを施削工具軸の回転駆動機構や直線移動機構に伝達しながら円筒状ワークと施削工具の相対的な動きにより実行される。   Turning of a cylindrical workpiece is performed by using moving distance data and position coordinate data calculated based on the distance and position coordinates recorded in the recording unit of the numerical control device in accordance with a machining program stored in the memory unit of the numerical control device. It is executed by the relative movement of the cylindrical workpiece and the cutting tool while being transmitted to the rotational drive mechanism or linear movement mechanism of the cutting tool shaft.

旋削加工中、工具のX軸−リニアースケール位置のパルス信号を受けて発信された旋削工具(砥石)14のX−軸位置数値と、位置センサ85から発信される砥石14のX−軸位置数値間に誤差があるときは、その誤差数値を補償するよう磁気軸受の可動子18aを固定した砥石軸13をコイル18bにより移動させる。   During turning, the X-axis position value of the turning tool (grinding stone) 14 transmitted in response to a pulse signal of the X-axis-linear scale position of the tool and the X-axis position value of the grinding wheel 14 transmitted from the position sensor 85 are transmitted. When there is an error between them, the grindstone shaft 13 to which the mover 18a of the magnetic bearing is fixed is moved by the coil 18b so as to compensate for the error value.

被旋削加工物の旋削加工終了後は、ワーク移動台を旋削加工開始点位置まで前後移動して戻し、ついで、ツール移動台を旋削加工待機位置まで直線後退移動させ、ついで、旋削工具軸の回転を停止させる。   After turning the work to be turned, the workpiece moving table is moved back and forth to the turning start position and then moved back to the turning standby position, and then the turning tool axis is rotated. Stop.

本発明の円筒状ワークの複合旋削加工機は、旋削工具軸13の直線方向の移動を磁気軸受による微量の移動と、サーボモータ、アクチュエータ、リニアモータ等のより大きい量の移動を併用できるので、旋削工具の磨耗があっても旋削加工途中での施削工具の位置を検出しながら磁気軸受による旋削工具軸の微量の移動で補償できるので、より寸法精度の高い被旋削加工品を得ることができる。また、旋削加工現場の旋削工具軸の静圧流体軸受に静圧水軸受を採用したことにより環境に優しい複合旋削加工機とすることができた。   The compound workpiece turning machine for cylindrical workpieces of the present invention can use a small amount of movement by a magnetic bearing and a larger amount of movement of a servo motor, an actuator, a linear motor, etc. for the movement of the turning tool shaft 13 in the linear direction. Even if the turning tool is worn, it can be compensated by a small amount of movement of the turning tool shaft by the magnetic bearing while detecting the position of the turning tool in the middle of turning, so that it is possible to obtain a turned product with higher dimensional accuracy. it can. In addition, by adopting hydrostatic water bearings as hydrostatic fluid bearings for turning tool shafts at the turning site, we were able to make an environmentally friendly complex turning machine.

6 砥石軸固定板
10 研削主軸装置
13 砥石軸
14 砥石
15 円筒状ハウジング
15a 給水口
15b バキューム吸引管
15c 圧空供給口
15d ドレン管
15e 水通路
15f 冷却液導入パイプ
15h 冷却液流路
15g 排出管
16,18 回転/直動複合アクチュエータ
16 ビルトインモータ
17 ボールターゲット
18a 可動子
18b コイル
85 位置測定手段
6 Grinding wheel shaft fixing plate 10 Grinding spindle device 13 Grinding wheel shaft 14 Grinding wheel 15 Cylindrical housing 15a Water supply port 15b Vacuum suction pipe 15c Pressure air supply port 15d Drain pipe 15e Water passage 15f Coolant introduction pipe 15h Coolant passage 15g Discharge pipe 16, 18 Combined Rotation / Linear Actuator 16 Built-in Motor 17 Ball Target 18a Movable Element 18b Coil 85 Position Measuring Means

Claims (2)

磁気軸受と静圧流体軸受により軸受けされる回転/直動可能なビルトインモータ駆動式の旋削工具軸、および、前記旋削工具軸を直線方向に移動可能に固定するツール移動台よりなる一対の旋削ステージと、
前記一対の旋削ステージ間に設けられた円筒状ワークを回転自在に緊結するワーク支持機構と、
前記円筒状ワークの軸心方向に対する前記旋削工具軸の位置(X座標)を検出する一対の位置センサと、
前記ワーク支持機構を前記円筒状ワークの軸心方向に対し直角方向(Z座標)に移動させるワーク移動台と、
前記一対の旋削工具軸の軸心と円筒状ワークの軸心とを同一直線上に芯出しする位置決め機構とを備える円筒状ワークの複合旋削加工機において、
前記旋削ステージとして、磁気軸受と静圧水軸受により軸受けされる回転/直動可能なビルトインモータ駆動式の旋削工具軸、前記旋削工具軸を回転/直動させる回転/直動複合アクチュエータ、前記旋削工具軸の直線移動距離を測定する位置測定手段、および、前記旋削工具軸を直線方向に移動可能に固定する移動台よりなる一対の旋削ステージを用いることを特徴とする、複合旋削加工機。
A pair of turning stages comprising a built-in motor-driven turning tool shaft supported by a magnetic bearing and a hydrostatic bearing and capable of rotating / directly moving, and a tool moving base for fixing the turning tool shaft to be movable in a linear direction. When,
A workpiece support mechanism for rotatably fastening a cylindrical workpiece provided between the pair of turning stages;
A pair of position sensors for detecting the position (X coordinate) of the turning tool axis with respect to the axial direction of the cylindrical workpiece;
A workpiece moving table for moving the workpiece support mechanism in a direction perpendicular to the axial direction of the cylindrical workpiece (Z coordinate);
In a cylindrical workpiece complex turning machine comprising a positioning mechanism for centering the axis of the pair of turning tool axes and the axis of the cylindrical workpiece on the same straight line,
As the turning stage, a built-in motor-driven turning tool shaft capable of rotation / linear movement supported by a magnetic bearing and a hydrostatic water bearing, a rotary / linear motion combined actuator for rotating / linearly moving the turning tool shaft, the turning A compound turning machine using a pair of turning stages comprising a position measuring means for measuring a linear movement distance of a tool axis and a moving stage for fixing the turning tool axis so as to be movable in a linear direction.
請求項1に記載の複合旋削加工機において、前記一対の旋削工具が砥石、ドリル、切削刃より選ばれた工具の同種の旋削工具の組み合わせまたは異種の旋削工具の組み合わせであることを特徴とする複合旋削加工機。   2. The compound turning machine according to claim 1, wherein the pair of turning tools is a combination of turning tools of the same kind selected from a grindstone, a drill, or a cutting blade, or a combination of different turning tools. Compound turning machine.
JP2009016095A 2009-01-28 2009-01-28 Composite turning cutting machine of cylindrical workpiece Pending JP2010172985A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103978426A (en) * 2014-05-23 2014-08-13 浙江勤龙机械科技股份有限公司 Full-static-pressure back-cone type high-speed main shaft of grinding head mechanism and assembly process thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103978426A (en) * 2014-05-23 2014-08-13 浙江勤龙机械科技股份有限公司 Full-static-pressure back-cone type high-speed main shaft of grinding head mechanism and assembly process thereof

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