JP2005313250A - Machine tool - Google Patents

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JP2005313250A
JP2005313250A JP2004130916A JP2004130916A JP2005313250A JP 2005313250 A JP2005313250 A JP 2005313250A JP 2004130916 A JP2004130916 A JP 2004130916A JP 2004130916 A JP2004130916 A JP 2004130916A JP 2005313250 A JP2005313250 A JP 2005313250A
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axis
saddle
axis direction
axis guide
guide rail
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JP4431788B2 (en
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Shuji Fujita
修司 藤田
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Niigata Machine Techno Co Ltd
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Niigata Machine Techno Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To improve straightness when moving a spindle head in an X-axis direction by enhancing supporting rigidity of the spindle head by a gantry column. <P>SOLUTION: This machine tool 1 is provided with the gantry column 5 provided with X-axis guide rails 3a and 3b on upper part and lower part on a front side, a saddle 7 having Y-axis guide rails 6 on both left and right sides and provided to be movable to left and right sides by being supported by each of the X-axis guide rails 3a and 3b of the gantry column 5, and the spindle head 8 having a spindle 20 and provided to be vertically movable by being guided by each of the Y-axis guide rails 6 of the saddle 7. A supporting part 5a projecting to a front side and extended in the X-axis direction is integrally provided at a lower end part of the gantry column 5. The X-axis guide rail 3b of the lower part is fixed to an upper surface of the supporting part 5a so that the distal end part may be directed to the above of the Y-axis direction. A guide block 16 supported and guided by the X-axis guide rail 3b of the lower part is fixed to a lower end of the saddle 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、門型コラムに左右に移動自在に支持したサドルに、主軸ヘッドを上下に移動自在に設けてなる工作機械に関する。   The present invention relates to a machine tool in which a spindle head is provided so as to be movable up and down on a saddle supported on a portal column so as to be movable left and right.

従来、この種の門型コラムを備えた工作機械として、前側に上下一対のＸ軸ガイドレールを設けた門型コラムと、前面に左右一対のＹ軸ガイドレールを有し、前記門型コラムの各Ｘ軸ガイドレールに支持されて、Ｘ軸移動装置により左右に移動するように設けられたサドルと、主軸を有し前記サドルの各Ｙ軸ガイドレールに案内されて、Ｙ軸移動装置により上下に移動するように設けられた主軸ヘッドとを備えたマシニングセンタが知られている（例えば、特許文献１参照）。
特開平８−２５１６１号公報 Conventionally, as a machine tool provided with this type of portal column, a portal column provided with a pair of upper and lower X-axis guide rails on the front side and a pair of left and right Y-axis guide rails on the front side, A saddle supported by each X-axis guide rail and provided to move left and right by an X-axis moving device, and a main shaft guided by each Y-axis guide rail of the saddle, and vertically moved by a Y-axis moving device There is known a machining center including a spindle head provided so as to move to (for example, see Patent Document 1).
JP-A-8-25161

前記マシニングセンタにおいては、前記サドルを門型コラムに支持する上下のＸ軸ガイドレールが、いずれも前記門型コラムの前面に、先端部を前側（Ｚ軸方向の前方）に突き出してボルトで固定され、前記各Ｘ軸ガイドレールにサドルの背面に固定したガイドブロックが支持案内される構造となっているために、前記各Ｘ軸ガイドレールの先端部側には、前記サドル、主軸ヘッド、Ｙ軸モータを含むＹ軸移動装置等の重量が、Ｙ軸方向の下方に向けて横荷重として作用し、したがって、前記各Ｘ軸ガイドレールは、その門型コラムに対する取付部である基端を支持点とする片持ち梁の状態で前記横荷重を支持することになる。
しかし、前記Ｘ軸ガイドレールは、前記横荷重に対する剛性が、前記横荷重の作用する方向に直角な方向の縦荷重に対する剛性に比べて弱い特性があるため、前記マシニングセンタは、前記門型コラムによる主軸ヘッドの支持剛性（機械剛性）、前記主軸ヘッドのＸ軸方向への移動時の真直性を向上させることができない難点があった。 In the machining center, the upper and lower X-axis guide rails that support the saddle on the portal column are both fixed to the front surface of the portal column with the front end protruding forward (in the Z-axis direction) with bolts. Since the guide block fixed to the back surface of the saddle is supported and guided by the X-axis guide rails, the saddle, the spindle head, and the Y-axis are disposed on the distal end side of the X-axis guide rails. The weight of the Y-axis moving device including the motor acts as a lateral load downward in the Y-axis direction. Therefore, each X-axis guide rail supports a base end that is a mounting portion for the portal column. The lateral load is supported in a cantilever state.
However, since the X-axis guide rail has a characteristic that the rigidity with respect to the lateral load is weaker than the rigidity with respect to the vertical load in the direction perpendicular to the direction in which the lateral load acts, the machining center is based on the portal column. There is a difficulty in improving the support rigidity (mechanical rigidity) of the spindle head and the straightness when the spindle head moves in the X-axis direction.

本発明は、上記事情に鑑みてなされたものであって、門型コラムによる主軸ヘッドの支持剛性を高めて、主軸ヘッドのＸ軸方向への移動時の真直性を向上させることができる工作機械を提供することを目的とする。   The present invention has been made in view of the above circumstances, and can improve the straightness when the spindle head is moved in the X-axis direction by increasing the support rigidity of the spindle head by the portal column. The purpose is to provide.

本発明は、前記課題を解決するために、前側の上部と下部にＸ軸ガイドレールを設けた門型コラムと、左右の両側にＹ軸ガイドレールを有し、前記門型コラムの各Ｘ軸ガイドレールに支持されて左右に移動自在に設けられたサドルと、主軸を有し前記サドルの各Ｙ軸ガイドレールに案内されて上下に移動自在に設けられた主軸ヘッドとを備えた工作機械において、前記門型コラムの下端部に、前側に突き出しＸ軸方向に延長された支持部を一体に設け、該支持部の上面に、前記下部のＸ軸ガイドレールを、その先端部がＹ軸方向の上方に向くように固定して設け、前記サドルの下端に前記下部のＸ軸ガイドレールに支持案内されるガイドブロックを固定して設けたことを特徴としている。   In order to solve the above problems, the present invention has a portal column provided with X-axis guide rails on the upper and lower sides of the front side, and Y-axis guide rails on both the left and right sides. In a machine tool comprising a saddle supported by a guide rail and provided to be movable left and right, and a spindle head having a main shaft and guided by each Y-axis guide rail of the saddle and provided to be movable up and down The lower end of the portal column is integrally provided with a support portion that protrudes forward and extends in the X-axis direction. The lower X-axis guide rail is provided on the upper surface of the support portion, and the tip portion thereof is in the Y-axis direction. And a guide block supported and guided by the lower X-axis guide rail is fixed to the lower end of the saddle.

本発明に係る工作機械によれば、下部のＸ軸ガイドレールが、門型コラムの下部に前側に突き出して設けた支持部の上面に先端部をＹ軸方向の上方に向けて固定された支持剛性の高い縦方向の設置状態において、前記サドルに加わるＹ軸方向の荷重を支持することができるので、門型コラムによる主軸ヘッドの支持剛性を高めて、主軸ヘッドのＸ軸方向への移動時の真直性を向上させることができる。   According to the machine tool of the present invention, the lower X-axis guide rail is fixed to the upper surface of the support portion that protrudes forward from the lower portion of the portal column and the tip is fixed upward in the Y-axis direction. When installed in the vertical direction with high rigidity, the load in the Y-axis direction applied to the saddle can be supported. Therefore, the support rigidity of the spindle head by the portal column is increased, and the spindle head moves in the X-axis direction. The straightness of the can be improved.

以下、本発明の一実施の形態に係る工作機械について図１〜図３を参照して説明する。 図１において、１は本発明の一実施の形態に係るマシニングセンタ等の工作機械である。この工作機械１は、ベース２と、Ｚ軸方向（図１で左右方向）の前側（図１で左側）の上部と下部にＸ軸ガイドレール３ａ，３ｂをＸ軸方向（図１で左右方向）に延長して設け、前記ベース２の後端部にボルト４で固定されて立設された門型コラム５と、前面における左右の両側にＹ軸方向（図１で上下方向）に延長されたＹ軸ガイドレール６，６を有し、前記門型コラム５の前側にＸ軸方向に移動自在に設けられたサドル７と、該サドル７の前面において前記Ｙ軸ガイドレール６，６に案内されて上下に移動自在に設けられた主軸ヘッド８と、前記サドル７をＸ軸方向に移動させるＸ軸移動装置９と、前記主軸ヘッド８をＹ軸方向に移動させるＹ軸移動装置１０とを備えている。   Hereinafter, a machine tool according to an embodiment of the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a machine tool such as a machining center according to an embodiment of the present invention. This machine tool 1 has a base 2 and X-axis guide rails 3a and 3b on the upper side and the lower side of the front side (left side in FIG. 1) in the Z-axis direction (left and right direction in FIG. 1). ), And a vertical column 5 fixed to the rear end of the base 2 with bolts 4 and extended in the Y-axis direction (vertical direction in FIG. 1) on both the left and right sides of the front surface. And a saddle 7 which is provided on the front side of the portal column 5 so as to be movable in the X-axis direction, and is guided to the Y-axis guide rails 6 and 6 on the front surface of the saddle 7. The spindle head 8 is provided so as to be movable up and down, the X-axis moving device 9 that moves the saddle 7 in the X-axis direction, and the Y-axis moving device 10 that moves the spindle head 8 in the Y-axis direction. I have.

前記上部のＸ軸ガイドレール３ａは、図２に示すように、前記門型コラム５の上部の前面に基端部３ａ１を当接させ、先端部３ａ２をＺ軸方向の前方（図１、図２で左方）へ突き出し、かつＸ軸方向に沿って水平に設けられている。また、前記上部のＸ軸ガイドレール３ａは、先端部３ａ２側から基端部３ａ１側へ向けて縦方向に貫通してあけたボルト孔に挿通させたボルト１１によって門型コラム５に固定されている。そして、前記サドル７の上部の背面（図２で右側面）にボルト１２により固定された左右一対のガイドブロック１３，１３が、前記上部のＸ軸ガイドレール３ａの先端部３ａ２に支持案内されて、前記サドル７の上部をＸ軸方向に誘導するようになっている。前記上部のＸ軸ガイドレール３ａとガイドブロック１３の門型コラム５とサドル７に対する取付構造は、従来の工作機械と同様であり、また、Ｘ軸ガイドレール３ａに対するガイドブロック１３の支持案内部の構造は、詳細は図示しないが、従来周知のものである。   As shown in FIG. 2, the upper X-axis guide rail 3a has a base end portion 3a1 in contact with the front surface of the upper portion of the portal column 5, and a front end portion 3a2 in front of the Z-axis direction (FIG. 1, FIG. 2 to the left) and provided horizontally along the X-axis direction. The upper X-axis guide rail 3a is fixed to the portal column 5 by a bolt 11 inserted through a bolt hole penetrating in the vertical direction from the distal end 3a2 side to the proximal end 3a1 side. Yes. Then, a pair of left and right guide blocks 13, 13 fixed to the upper rear surface (right side surface in FIG. 2) of the saddle 7 with bolts 12 are supported and guided by the tip 3a2 of the upper X-axis guide rail 3a. The upper part of the saddle 7 is guided in the X-axis direction. The mounting structure of the upper X-axis guide rail 3a and the guide block 13 to the portal column 5 and the saddle 7 is the same as that of a conventional machine tool, and the support guide portion of the guide block 13 to the X-axis guide rail 3a is provided. Although the structure is not shown in detail, the structure is well known in the art.

また、前記門型コラム５の下端部には、Ｚ軸方向の前側（図１で左側）に突き出しＸ軸方向に延長された支持部５ａが一体に設けられており、前記下部のＸ軸ガイドレール３ｂは、図３に示すように、前記支持部５ａの上面に形成された設置面５ｂとその段部５ｃに基部３ｂ１を当接させて、先端部３ｂ２をＹ軸方向の上方に向けられた状態（縦方向に配置した状態）として、Ｘ軸方向に沿って水平に設けられている。また、前記上部のＸ軸ガイドレール３ａと同様に、先端部３ｂ２側から基端部３ｂ１側へ向けて縦方向に貫通してあけたボルト孔に挿通させたボルト１４によって前記支持部５ａに固定されている。そして、前記サドル７の下端にボルト１５により固定された左右一対のガイドブロック１６，１６が、前記下部のＸ軸ガイドレール３ｂの上方を向いた先端部３ｂ２に支持案内されて、前記サドル７の下部をＸ軸方向に誘導するようになっている。なお、下部のＸ軸ガイドレール３ｂに対するガイドブロック１６の支持案内部の構造は、詳細は図示しないが、前記上部のＸ軸ガイドレール３ａに対するガイドブロック１６の支持案内部の構造と同様である。   Further, the lower end portion of the portal column 5 is integrally provided with a support portion 5a that protrudes forward in the Z-axis direction (left side in FIG. 1) and extends in the X-axis direction. As shown in FIG. 3, the rail 3b has the base 3b1 in contact with the installation surface 5b formed on the upper surface of the support portion 5a and the stepped portion 5c, and the tip 3b2 is directed upward in the Y-axis direction. As a state (arranged in the vertical direction), it is provided horizontally along the X-axis direction. Similarly to the upper X-axis guide rail 3a, it is fixed to the support portion 5a by a bolt 14 inserted through a bolt hole penetrating in a vertical direction from the distal end portion 3b2 side to the proximal end portion 3b1 side. Has been. A pair of left and right guide blocks 16, 16 fixed to the lower end of the saddle 7 by bolts 15 are supported and guided by the tip 3b2 facing upward of the lower X-axis guide rail 3b. The lower part is guided in the X-axis direction. The structure of the support guide portion of the guide block 16 for the lower X-axis guide rail 3b is the same as the structure of the support guide portion of the guide block 16 for the upper X-axis guide rail 3a, although details are not shown.

また、前記Ｘ軸移動装置９は、前記サドル７の背面に固定されたボールナット１７と、該ボールナット１７に螺合されてＸ軸方向に延長され、両端を前記門型コラム５の両端側下部に回転自在に支持されたボールねじ軸１８と、門型コラム５の一側下部に設置され前記ボールねじ軸１８を回転させるＸ軸サーボモータ１９とを備え、該Ｘ軸サーボモータ１９により前記ボールねじ軸１８を回転させることにより前記ボールナット１７を介して前記サドル７をＸ軸方向（図１で左右方向）に往復移動させるようになっている。
さらに、前記Ｙ軸移動装置１０は、前記主軸ヘッド８の背面側（主軸２０のある側と反対側）に設けたボールナット２１と、該ボールナット２１に螺合されてＹ軸方向に延長され、上下端を前記サドル７の上下部に回転自在に支持されたボールねじ軸２２と、前記サドル７の上端部に設置され前記ボールねじ軸２２を回転させるＹ軸サーボモータ２３とを備え、該Ｙ軸サーボモータ２３により前記ボールねじ軸２２を回転させることにより前記ボールナット２１を介して前記主軸ヘッド８をＹ軸方向（図１で上下方向）に往復移動させるようになっている。 The X-axis moving device 9 has a ball nut 17 fixed to the back surface of the saddle 7 and is screwed to the ball nut 17 to extend in the X-axis direction. A ball screw shaft 18 rotatably supported at the lower portion and an X-axis servo motor 19 that is installed at one side lower portion of the portal column 5 and rotates the ball screw shaft 18 are provided by the X-axis servo motor 19. By rotating the ball screw shaft 18, the saddle 7 is reciprocated in the X-axis direction (left-right direction in FIG. 1) via the ball nut 17.
Furthermore, the Y-axis moving device 10 is extended to the Y-axis direction by being screwed to the ball nut 21 provided on the back side of the spindle head 8 (opposite to the side where the spindle 20 is located). A ball screw shaft 22 having upper and lower ends rotatably supported on the upper and lower portions of the saddle 7, and a Y-axis servomotor 23 installed on the upper end portion of the saddle 7 and rotating the ball screw shaft 22. By rotating the ball screw shaft 22 by a Y-axis servomotor 23, the spindle head 8 is reciprocated in the Y-axis direction (vertical direction in FIG. 1) via the ball nut 21.

上記のように構成された工作機械１においては、図示しないが、前記ベース２のＺ軸方向の前方にＺ軸駆動装置によってＺ軸方向に移動するテーブルが設置されており、該テーブル上に固定されたワークが、前記Ｘ軸，Ｙ軸移動装置９，１０とＺ軸移動装置を作動させて、主軸ヘッド８の主軸２０をワークの加工位置まで移動させた後に、ワークと前記主軸２０との間に相対的な切削運動を行わせることにより、主軸２０に装着した工具によって前記ワークを加工する。この場合、前記サドル７を支持している前記上下部のＸ軸ガイドレール３ａ，３ｂには、常時、前記サドル７、主軸ヘッド８、Ｙ軸移動装置１０等の重量がＹ軸方向の下方への荷重として作用すると共に、加工時、主軸２０の移動方向によって切削抵抗が前記荷重に付加されて更に大きな荷重としてＹ軸方向へ作用するが、Ｙ軸方向の上方に向けて門型コラム５の下端部の支持部に固定した下部のＸ軸ガイドレール３ｂは、その支持剛性の高い縦方向において、前記サドル７（サドル７自体の重量を含む）に加わるＹ軸方向の荷重を、従来の工作機械のように片持ち梁状態でＸ軸ガイドレールが受ける曲げ荷重ではなく、圧縮荷重Ｗ１として受けて該Ｙ軸方向への変形を抑えながら強固に支持する。   In the machine tool 1 configured as described above, although not shown, a table that moves in the Z-axis direction by a Z-axis drive device is installed in front of the base 2 in the Z-axis direction, and is fixed on the table. After the workpiece is moved by operating the X-axis and Y-axis moving devices 9 and 10 and the Z-axis moving device to move the spindle 20 of the spindle head 8 to the workpiece machining position, the workpiece and the spindle 20 The workpiece is machined by a tool mounted on the spindle 20 by causing a relative cutting motion between them. In this case, the upper and lower X-axis guide rails 3a and 3b supporting the saddle 7 always have the weight of the saddle 7, the spindle head 8 and the Y-axis moving device 10 downward in the Y-axis direction. At the time of machining, a cutting resistance is added to the load depending on the moving direction of the main shaft 20 and acts as a larger load in the Y-axis direction, but the portal column 5 is moved upward in the Y-axis direction. The lower X-axis guide rail 3b fixed to the lower-end support portion applies a load in the Y-axis direction applied to the saddle 7 (including the weight of the saddle 7 itself) in the vertical direction with high support rigidity. Instead of the bending load received by the X-axis guide rail in a cantilever state as in a machine, it is received as a compressive load W1 and firmly supported while suppressing deformation in the Y-axis direction.

このため、上部のＸ軸ガイドレール３ａは、従来と同様に片持ち梁の状態となって先端部３ａ２で前記Ｙ軸方向の荷重を分担して曲げ荷重Ｗ２として受けることになるが、下部のＸ軸ガイドレール３ｂが変形を抑えて強固にＹ軸方向の荷重を支持する分だけ、分担荷重が軽減されてＹ軸方向へ撓みを可及的に小さく抑えられる。
したがって、前記門型コラム５の上下部のＸ軸ガイドレール３ａ，３ｂによる前記サドル７（主軸ヘッド８）の支持剛性（機械剛性）を高めて、前記主軸ヘッド８のＸ軸方向への移動時の真直性を向上させることができる。 For this reason, the upper X-axis guide rail 3a is in a cantilever state as in the prior art, and the tip portion 3a2 shares the load in the Y-axis direction and receives it as a bending load W2. Since the X-axis guide rail 3b suppresses deformation and firmly supports the load in the Y-axis direction, the shared load is reduced and the deflection in the Y-axis direction can be suppressed as small as possible.
Therefore, the support rigidity (mechanical rigidity) of the saddle 7 (spindle head 8) by the upper and lower X-axis guide rails 3a and 3b of the portal column 5 is increased, and the spindle head 8 is moved in the X-axis direction. The straightness of the can be improved.

なお、前記上部のＸ軸ガイドレール３ａによる前記サドル７の上部の支持構造を、従来のように、片持ち梁の状態でＹ軸方向の荷重を支持する形式のものとせずに、前記下部のＸ軸ガイドレール３ｂによる前記サドル７の下部の支持構造と同様にすることもできる。
この場合には、前記上部のＸ軸ガイドレール３ａを、前記門型コラム５の上端の前側部分に、先端部３ａ２をＹ軸方向の上方へ向けた状態でＸ軸方向に沿わせて固定すると共に、前記サドル７の上部の背面側を門型コラム５の上端の前側部分の上方側に突き出させて、その突出部分の下面に前記ガイドブロック１３を固定するようにする。
このようにすると、上部のＸ軸ガイドレール３ａも支持剛性の高い縦方向の設置状態において、Ｙ軸方向の荷重を強固に支持することができるので、上部のＸ軸ガイドレール３ａの変形も抑えられ、前記主軸ヘッド８のＸ軸方向への移動時の真直性を一層向上させることができる。 The support structure for the upper part of the saddle 7 by the upper X-axis guide rail 3a is not of the type that supports the load in the Y-axis direction in a cantilever state as in the prior art. The support structure below the saddle 7 by the X-axis guide rail 3b may be used.
In this case, the upper X-axis guide rail 3a is fixed to the front portion of the upper end of the portal column 5 along the X-axis direction with the tip 3a2 facing upward in the Y-axis direction. At the same time, the back side of the upper part of the saddle 7 is protruded above the front part of the upper end of the portal column 5, and the guide block 13 is fixed to the lower surface of the protruding part.
In this way, the upper X-axis guide rail 3a can also firmly support the load in the Y-axis direction in the vertical installation state with high support rigidity, so that deformation of the upper X-axis guide rail 3a is also suppressed. Thus, the straightness when the spindle head 8 moves in the X-axis direction can be further improved.

前記のように、実施の形態に係る工作機械１は、前側の上部と下部にＸ軸ガイドレール３ａ，３ｂを設けた門型コラム５と、左右の両側にＹ軸レール６，６を有し、前記門型コラム５の各Ｘ軸ガイドレール３ａ，３ｂに支持されて左右に移動自在に設けられたサドル７と、主軸２０を有し前記サドル７の各Ｙ軸ガイドレール６，６に案内されて上下に移動自在に設けられた主軸ヘッド８とを備え、前記門型コラム５の下端部に前側に突き出しＸ軸方向に延長された支持部５ａを一体に設け、該支持部５ａの上面（設置面５ｂ）に、前記下部のＸ軸ガイドレール３ｂを、その先端部３ｂ２がＹ軸方向の上方に向くように固定して設け、前記サドル７の下端に前記下部のＸ軸ガイドレール３ｂに支持案内されるガイドブロック１６，１６を固定して設けた構成とされている。   As described above, the machine tool 1 according to the embodiment includes the portal column 5 provided with the X-axis guide rails 3a and 3b on the upper and lower portions on the front side, and the Y-axis rails 6 and 6 on the left and right sides. The saddle 7 is supported by the X-axis guide rails 3a and 3b of the portal column 5 and is provided so as to be movable left and right. The main shaft 20 is guided to the Y-axis guide rails 6 and 6 of the saddle 7. And a main spindle head 8 which is provided so as to be movable up and down, and is integrally provided with a support portion 5a protruding forward and extending in the X-axis direction at the lower end portion of the portal column 5, and the upper surface of the support portion 5a. (Installation surface 5b) is provided with the lower X-axis guide rail 3b fixed so that the tip 3b2 faces upward in the Y-axis direction, and at the lower end of the saddle 7, the lower X-axis guide rail 3b is provided. The guide blocks 16 and 16 supported and guided by the There is a provided configuration.

したがって、実施の形態に係る工作機械１によれば、下部のＸ軸ガイドレール３ｂが、門型コラム５の下端部に前側に突き出して設けた支持部５ａの上面に先端部３ｂ２をＹ軸方向の上方（荷重に対向する方向）に向けて固定された支持剛性の高い縦方向の設置状態において、前記サドル７に加わるＹ軸方向の荷重Ｗ１を支持することができるので、門型コラム５による主軸ヘッド８の支持剛性を高めて、主軸ヘッド８のＸ軸方向への移動時の真直性を向上させることができる。
なお、前記実施の形態に係る工作機械１においては、前記門型コラム５をベース２に固定し、該門型コラム５に対してベース２に設けたテーブルをＺ軸方向に移動させるようにした形式のものを例示したが、本発明はこれに限らず、前記ベース上にテーブルを固定し、前記門型コラム５を固定のテーブル側に移動させるようにした形式のものに適用することもできる。 Therefore, according to the machine tool 1 according to the embodiment, the lower X-axis guide rail 3b projects the front end portion 3b2 on the upper surface of the support portion 5a provided at the lower end portion of the portal column 5 in the Y-axis direction. In the vertical installation state with high support rigidity fixed toward the upper side (direction facing the load), the load W1 in the Y-axis direction applied to the saddle 7 can be supported. The support rigidity of the spindle head 8 can be increased, and the straightness when the spindle head 8 moves in the X-axis direction can be improved.
In the machine tool 1 according to the embodiment, the portal column 5 is fixed to the base 2 and the table provided on the base 2 is moved in the Z-axis direction with respect to the portal column 5. Although the type is exemplified, the present invention is not limited to this, and can be applied to a type in which a table is fixed on the base and the portal column 5 is moved to the fixed table side. .

本発明の一実施の形態における工作機械を示す斜視図である。It is a perspective view which shows the machine tool in one embodiment of this invention. 同じくサドル上部におけるＸ軸方向への支持案内部を示す横断面図である。It is a cross-sectional view which similarly shows the support guide part to the X-axis direction in the saddle upper part. 同じくサドル下部におけるＸ軸方向への支持案内部を示す横断面図である。It is a cross-sectional view which similarly shows the support guide part to the X-axis direction in the saddle lower part.

符号の説明Explanation of symbols

１ 工作機械
２ ベース
３ａ，３ｂ 上部、下部のＸ軸ガイドレール
５ 門型コラム
５ａ 支持部
６ Ｙ軸ガイドレール
７ サドル
８ 主軸ヘッド
９ Ｘ軸移動装置
１０ Ｙ軸移動装置
１３，１６ ガイドブロック
２０ 主軸
Ｗ１，Ｗ２ 荷重 DESCRIPTION OF SYMBOLS 1 Machine tool 2 Base 3a, 3b Upper and lower X-axis guide rail 5 Portal column 5a Support part 6 Y-axis guide rail 7 Saddle 8 Spindle head 9 X-axis moving device 10 Y-axis moving device 13, 16 Guide block 20 Spindle W1, W2 load

Claims (1)

前側の上部と下部にＸ軸ガイドレールを設けた門型コラムと、左右の両側にＹ軸ガイドレールを有し、前記門型コラムの各Ｘ軸ガイドレールに支持されて左右に移動自在に設けられたサドルと、主軸を有し前記サドルの各Ｙ軸ガイドレールに案内されて上下に移動自在に設けられた主軸ヘッドとを備えた工作機械において、
前記門型コラムの下端部に、前側に突き出しＸ軸方向に延長された支持部を一体に設け、該支持部の上面に、前記下部のＸ軸ガイドレールを、その先端部がＹ軸方向の上方に向くように固定して設け、前記サドルの下端に前記下部のＸ軸ガイドレールに支持案内されるガイドブロックを固定して設けたことを特徴とする工作機械。
A portal column with X-axis guide rails on the top and bottom of the front side, and Y-axis guide rails on both the left and right sides, supported by the X-axis guide rails of the portal column and provided to be movable left and right A machine tool comprising a saddle, and a spindle head that has a spindle and is guided by the Y-axis guide rails of the saddle so as to be movable up and down.
A support portion that protrudes forward and extends in the X-axis direction is integrally provided at a lower end portion of the portal column, and the lower X-axis guide rail is provided on the upper surface of the support portion, and a tip portion thereof extends in the Y-axis direction. A machine tool, wherein the machine tool is fixed so as to face upward, and a guide block supported and guided by the lower X-axis guide rail is fixed to a lower end of the saddle.
JP2004130916A 2004-04-27 2004-04-27 Machine Tools Expired - Lifetime JP4431788B2 (en)

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Publication number Priority date Publication date Assignee Title
US7527460B2 (en) * 2004-04-07 2009-05-05 Hpt Sinergy S.R.L. Horizontal milling-boring machine with mobile column
WO2014061210A1 (en) 2012-10-16 2014-04-24 ホーコス株式会社 Machine tool
CN104039499A (en) * 2012-10-16 2014-09-10 报国股份有限公司 Machine tool
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JPWO2014061210A1 (en) * 2012-10-16 2016-09-05 ホーコス株式会社 Machine Tools
US9492902B2 (en) 2012-10-16 2016-11-15 Horkos Corporation Machine tool
CN106862942A (en) * 2015-12-14 2017-06-20 财团法人工业技术研究院 Toolroom machine and its feeding saddle structure
CN106271680A (en) * 2016-08-30 2017-01-04 佛山市普拉迪数控科技有限公司 A kind of L-shaped Longmen machine tool
CN114055183A (en) * 2020-07-29 2022-02-18 河北航天振邦精密机械有限公司 Integral stand column of multi-dimensional machine tool
CN114055183B (en) * 2020-07-29 2024-03-26 河北航天振邦精密机械有限公司 Integral upright post of multi-dimensional machine tool

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