WO1993000200A1 - Machine tool - Google Patents

Machine tool Download PDF

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Publication number
WO1993000200A1
WO1993000200A1 PCT/JP1992/000788 JP9200788W WO9300200A1 WO 1993000200 A1 WO1993000200 A1 WO 1993000200A1 JP 9200788 W JP9200788 W JP 9200788W WO 9300200 A1 WO9300200 A1 WO 9300200A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle head
spindle
machine tool
passage
cooling medium
Prior art date
Application number
PCT/JP1992/000788
Other languages
French (fr)
Japanese (ja)
Inventor
Koichiro Kitamura
Original Assignee
Kitamura Machinery 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 Kitamura Machinery Co., Ltd. filed Critical Kitamura Machinery Co., Ltd.
Publication of WO1993000200A1 publication Critical patent/WO1993000200A1/en

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Classifications

    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
    • B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles

Definitions

  • the present invention relates to a machine tool having a spindle head.
  • the present inventor has proposed in Japanese Patent Application No. 63-13608 a working machine having a configuration in which a spindle head is cooled by a cooling medium.
  • This machine tool has a cooling medium space that surrounds the entire wall surface of the spindle head.
  • the medium space has a thin and wide shape surrounding the entire spindle head, when the cooling medium flows through the space, the flow tends to be stagnant or uneven, which has led to uneven cooling.
  • the present invention is intended to improve this machine tool.
  • An object of the present invention is to provide a machine tool capable of suppressing a thermal displacement of a spindle and a spindle head and improving machining accuracy. I have.
  • the gist of the present invention is characterized in that, in a machine tool having a spindle head, an elongated passage is provided in a zigzag pattern on a wall surface of the spindle head, and a cooling medium is flown along the passage to cool the spindle head. Machine tool.
  • FIG. 1 is a side view showing an embodiment of a machine tool according to the present invention.
  • Fig. 2 is a partially cutaway side view showing the spindle head of Fig. 1.
  • Fig. 3 is a sectional view taken along the line A-A in Fig. 2.
  • the machine tool has a bed 1, a table 2, a column 3, and a spindle head 4.
  • Table 2 is set to bed 1 and can be moved by driving motor 5 in the X direction.
  • Column 3 can be moved in the direction of arrow Y 1 or Y 2 by driving motor 6.
  • the spindle head 4 can be moved up and down in the direction of the arrow Z1 or Z2 by driving the motor 7 along the vertical direction of the column 3.
  • the spindle head 4 includes a spindle 12, a motor 11, and the like.
  • the spindle head 4 rotatably supports the spindle 12.
  • Gear 13 of spindle 12 meshes with gear 14.
  • Gears 14 and 15 are fixed to axis 16.
  • Gear 15 meshes with gear 17.
  • Gear 17 is fixed to output shaft 18 of motor 11. This allows When the output shaft 18 of the motor 11 rotates, the spindle 12 can rotate through the gears 17, 15, 15, 14 and 13.
  • a tool holder 10 is detachably attached to a lower end of the spindle 12.
  • a tool 19 is set in the tool holder 110.
  • An elongated passage 30 is formed in a zigzag shape on the wall surface of the spindle head 4.
  • the passage 30 is formed by the inner wall 21 and the covers 31, 32, 33, 34, as shown in FIGS.
  • the passage 30 is disposed so as to bend many times in a zigzag manner to cover the entire side surface of the spindle head 4.
  • the passage 30 has inlet and outlet forces. These entrances are connected to lines 26 and 27, respectively.
  • the inner wall 21 constitutes a gear box 23.
  • the cooling oil 22 is supplied from the cooling oil storage section 25 through the line 26 as shown in FIG. 1, passes between the outer wall 20 and the inner wall 21, and is stored through the line 27. We are returning to 25.
  • Temperature sensors are provided at various positions on the spindle head 4 so that the temperature and flow rate of the cooling medium are adjusted according to the detected temperature.
  • the present invention is not limited to the above-described embodiment.
  • a cooling gas for example, a nitrogen gas, may be used instead of the cooling oil.
  • the working machine in the illustrated example is a vertical machining center, it goes without saying that the present invention can be applied to other types of working machines. Furthermore, it can be applied to a woodworking machine that rotates at high speed.
  • the shape of the passage is not limited to the shape in the illustrated example.
  • the flow path may be formed in a spiral shape.
  • the width of the passage may not be uniform.
  • the passage can be provided not only on the side surface of the spindle head, but also on the upper and lower surfaces where it can be installed.
  • the spindle head 4 can be cooled by flowing the cooling medium 22 along 30.
  • the cooling efficiency is high, and there is no stagnation or uneven flow. Therefore, the spindle head 4 can be effectively cooled without unevenness.
  • the thermal displacement of the spindle head and spindle is Processing can be performed in degrees. Therefore, the accuracy of the product can be improved.
  • the entire head of the spindle can be cooled efficiently without unevenness, so that machining accuracy can be further improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Machine Tool Units (AREA)
  • Turning (AREA)

Abstract

A machine tool comprising a spindle head, characterized in that an elongate path (30) is formed on a wall surface of the spindle head (4) in a zigzag shape and cooling medium (22) is caused to flow through the path (30) to thereby cool the spindle head (4).

Description

明 細 書 工作機械 技 術 分 野  Description Machine tool technology
この発明は、 主軸頭を備えている工作機械に関するもの 2 る。  The present invention relates to a machine tool having a spindle head.
¾ 旦  ¾
近年、 工作機械の主軸は、 加工効率を高めるために高速 化が図られている。  In recent years, the speed of spindles of machine tools has been increased to increase machining efficiency.
ところが、 このようにすると、 ベア リ ングゃギア駆動部 等からの発熱が大き く なり、 主軸および主軸を支持してい る主軸頭の熱変位が生じ易く なる。 このため、 加工精度が 低下する こ とになる。  However, in this case, heat generated from the bearing and gear drive unit and the like increases, and thermal displacement of the spindle and the spindle head supporting the spindle is likely to occur. For this reason, the processing accuracy is reduced.
この不都合を解消するため、 本発明者は特願昭 6 3— 1 3 6 0 8号において主軸頭を冷却媒体で冷却する構成のェ 作機械を提案している。 この工作機械は、 主軸頭の壁面全 体を囲む形状の冷却媒体用空間を有している。 しかし、 こ の媒体空間は主軸頭全体を囲む薄肉幅広形状であるため、 冷却媒体が空間内を流れる時に流れの停滞や流れムラが発 生し易く、 これが冷却ムラにつながつていた。  In order to solve this inconvenience, the present inventor has proposed in Japanese Patent Application No. 63-13608 a working machine having a configuration in which a spindle head is cooled by a cooling medium. This machine tool has a cooling medium space that surrounds the entire wall surface of the spindle head. However, since the medium space has a thin and wide shape surrounding the entire spindle head, when the cooling medium flows through the space, the flow tends to be stagnant or uneven, which has led to uneven cooling.
発明の概要  Summary of the Invention
本発明はこの工作機械の改良を意図したものである。 この発明は、 主軸及び主軸頭の熱変位を抑え加工精度を 高めることができる工作機械を提供することを目的と して いる。 The present invention is intended to improve this machine tool. An object of the present invention is to provide a machine tool capable of suppressing a thermal displacement of a spindle and a spindle head and improving machining accuracy. I have.
本発明の要旨は、 主軸頭を備えている工作機械において、 主軸頭の壁面に細長い通路をジグザグ伏に設け、 通路に沿 つて冷却媒体を流して主軸頭を冷却する構成にしたことを 特徵とする工作機械である。  The gist of the present invention is characterized in that, in a machine tool having a spindle head, an elongated passage is provided in a zigzag pattern on a wall surface of the spindle head, and a cooling medium is flown along the passage to cool the spindle head. Machine tool.
図面の簡単な説明  BRIEF DESCRIPTION OF THE FIGURES
図 1はこの発明の工作機械の実施例を示す側面図  FIG. 1 is a side view showing an embodiment of a machine tool according to the present invention.
図 2は図 1の主軸頭を示す一部切欠き側面図  Fig. 2 is a partially cutaway side view showing the spindle head of Fig. 1.
図 3は図 2の A— A断面図  Fig. 3 is a sectional view taken along the line A-A in Fig. 2.
好適な実施例の詳細な説明  Detailed Description of the Preferred Embodiment
第 1図を参照する。  Please refer to FIG.
工作機械  Machine Tools
工作機械は、 べッ ド 1、 テーブル 2、 コラム 3、 主軸頭 4を備えている。 テーブル 2は、 べッ ド 1に設定されてお り、 X方向にモータ 5の駆動により移動できる。 コラム 3 はモータ 6の駆動により矢印 Y 1或いは Y 2の方向に移動 できる。 主軸頭 4は、 コラム 3の上下方向に沿ってモータ 7の駆動により矢印 Z 1或いは Z 2の方向に昇降できる。  The machine tool has a bed 1, a table 2, a column 3, and a spindle head 4. Table 2 is set to bed 1 and can be moved by driving motor 5 in the X direction. Column 3 can be moved in the direction of arrow Y 1 or Y 2 by driving motor 6. The spindle head 4 can be moved up and down in the direction of the arrow Z1 or Z2 by driving the motor 7 along the vertical direction of the column 3.
主軸頭  Spindle head
主軸頭 4は、 主軸 1 2、 モータ 1 1等を備えている。  The spindle head 4 includes a spindle 12, a motor 11, and the like.
第 2図を参照すると、 主軸頭 4は主軸 1 2を回転可能に 支持している。 ス ピン ドル 1 2のギア 1 3は、 ギア 1 4と 嚙み合っている。 ギア 1 4とギア 1 5は軸 1 6に固定され ている。 ギア 1 5はギア 1 7に嚙み合っている。 ギア 1 7 はモータ 1 1の出力軸 1 8に固定されている。 これにより、 モータ 1 1の出力軸 1 8が回転すると、 ギア 1 7, 1 5， 1 4， 1 3を介してス ピン ドル 1 2を回転可能である。 ス ピン ドル 1 2の下端にはツールホルダ 1 0が着脱可能に取 付けられている。 ツールホルダ一 1 0にはツール 1 9が設 定されている。 Referring to FIG. 2, the spindle head 4 rotatably supports the spindle 12. Gear 13 of spindle 12 meshes with gear 14. Gears 14 and 15 are fixed to axis 16. Gear 15 meshes with gear 17. Gear 17 is fixed to output shaft 18 of motor 11. This allows When the output shaft 18 of the motor 11 rotates, the spindle 12 can rotate through the gears 17, 15, 15, 14 and 13. A tool holder 10 is detachably attached to a lower end of the spindle 12. A tool 19 is set in the tool holder 110.
主軸頭 4の壁面には細長い通路 3 0がジグザグ状に形成 されている。 通路 3 0は、 図 2と図 3に示すように、 内壁 2 1とカバ 3 1 , 3 2, 3 3, 3 4で形成してある。 通路 3 0はジグザグ状に何度も曲って主軸頭 4の側面全体を網 羅するように配置されている。 通路 3 0には入口と出口力 設けてある。 これらの出入口はそれぞれライ ン 2 6， 2 7 に接続されている。 内壁 2 1は、 ギアボッ クス 2 3を構成 している。 冷却油 22は、 第 1図で示すように冷却油収容 部 2 5からライ ン 2 6を介して供給され、 外壁 2 0と内壁 2 1の間を通り、 ライ ン 2 7を介して収容部 2 5に戻るよ うになつている。  An elongated passage 30 is formed in a zigzag shape on the wall surface of the spindle head 4. The passage 30 is formed by the inner wall 21 and the covers 31, 32, 33, 34, as shown in FIGS. The passage 30 is disposed so as to bend many times in a zigzag manner to cover the entire side surface of the spindle head 4. The passage 30 has inlet and outlet forces. These entrances are connected to lines 26 and 27, respectively. The inner wall 21 constitutes a gear box 23. The cooling oil 22 is supplied from the cooling oil storage section 25 through the line 26 as shown in FIG. 1, passes between the outer wall 20 and the inner wall 21, and is stored through the line 27. We are returning to 25.
第 3図では、 流路 3 0の形状が明確に示されている。 主 軸頭 4の各所には温度セ ンサ （図示せず） が設けてあり、 検出された温度に応じて冷却媒体の温度と流量を調整する ようになっている。  In FIG. 3, the shape of the channel 30 is clearly shown. Temperature sensors (not shown) are provided at various positions on the spindle head 4 so that the temperature and flow rate of the cooling medium are adjusted according to the detected temperature.
使用に際しては、 第 1図で説明すると、 テーブル 2の位 置を設定し、 コラム 3の移動を行い、 更に主軸頭 4を下げ て、 ッ一ルによりテーブル 2の上のワーク Wを加工する。 この加工の際に、 第 2図の主軸 1 2は高速回転をしている。 この高速回転によりベア リ ング部 1 3 0やギア 1 3， 1 4， 1 5 , 1 7の嚙み合い部分等で発熱が生じ、 ギアボッ クスIn use, as shown in Fig. 1, the position of table 2 is set, the column 3 is moved, the spindle head 4 is lowered, and the work W on the table 2 is machined by the tool. At the time of this processing, the spindle 12 in FIG. 2 is rotating at high speed. Due to this high-speed rotation, the bearing section 130 and the gears 13, 14, Heat is generated at the mating parts of 15 and 17 and the gearbox
2 3全体の温度が高まる。 このため、 主軸頭 4全体の熱変 位を起こ し易い。 しかし、 冷却油 2 2が主軸頭 4に流れて いるので、 この発生熱を吸収することができ、 主軸頭或い はギアボックス 2 3の変形を防ぐことができる。 このため、 ツール 1 9 により、 ワークに対し高精度で加工を行う こと ができるのである。 2 3 The overall temperature increases. For this reason, thermal displacement of the entire spindle head 4 easily occurs. However, since the cooling oil 22 flows to the spindle head 4, the generated heat can be absorbed and deformation of the spindle head or the gear box 23 can be prevented. For this reason, the tool 19 can machine the workpiece with high accuracy.
ところで、 この発明は上述した実施例に限定されるもの ではない。 例えば、 冷却油の代わりに冷却用の気体、 例え ば窒素ガス等を用いるようにしてもよい。 また図示例のェ 作機械は立型のマシニングセンタであるが、 他の形式のェ 作機械においても、 勿論、 この発明は適用できることはい うまでもない。 更に、 高速回転をする木工機械等に適用す ることも可能である。  Incidentally, the present invention is not limited to the above-described embodiment. For example, a cooling gas, for example, a nitrogen gas, may be used instead of the cooling oil. Further, although the working machine in the illustrated example is a vertical machining center, it goes without saying that the present invention can be applied to other types of working machines. Furthermore, it can be applied to a woodworking machine that rotates at high speed.
また、 通路の形状は図示例の形状に限定されない。 らせ ん状に流路を形成してもよい。 また、 通路の幅は一様でな くてもよい。 通路は主軸頭の側面ばかりでなく、 上 · 下面 の設置可能な領域に設けることができる。  Further, the shape of the passage is not limited to the shape in the illustrated example. The flow path may be formed in a spiral shape. The width of the passage may not be uniform. The passage can be provided not only on the side surface of the spindle head, but also on the upper and lower surfaces where it can be installed.
主軸 1 2を高速回転させても、 ジグザグ状に設けた通路 Even if the main shaft 12 is rotated at a high speed, a zigzag passage
3 0に沿つて冷却媒体 2 2を流すことにより主軸頭 4を冷 却することができる。 しかも、 冷却媒体 2 2がジグザグ状 の細長い通路 3 0に沿って流れるので、 冷却効率が高く、 流れの停滞や流れムラが生じない。 従って、 主軸頭 4をム ラなく効果的に冷却できる。 The spindle head 4 can be cooled by flowing the cooling medium 22 along 30. In addition, since the cooling medium 22 flows along the zigzag elongated passage 30, the cooling efficiency is high, and there is no stagnation or uneven flow. Therefore, the spindle head 4 can be effectively cooled without unevenness.
以上説明したように、 主軸頭や主軸の熱変位を抑え高精 度で加工を行う ことができる。 このため製品の精度を向上 できる。 特に、 細長い通路をジグザグ状に設けて、 この通 路に沿って冷却媒体を流すため、 主軸頭全体をムラなく効 率よく冷却できるので加工精度をいつそう向上できる。 As described above, the thermal displacement of the spindle head and spindle is Processing can be performed in degrees. Therefore, the accuracy of the product can be improved. In particular, since a long and narrow passage is provided in a zigzag shape, and the cooling medium flows along the passage, the entire head of the spindle can be cooled efficiently without unevenness, so that machining accuracy can be further improved.

Claims

請 求 の 範 囲 The scope of the claims
1 . 主軸頭を備えている工作機械において、 主軸頭 （4) の壁面に細長い通路 （3 0) をジグザグ状に設け、 通路 1. In a machine tool equipped with a spindle head, a slender passage (30) is formed in a zigzag shape on the wall surface of the spindle head (4).
(3 0) に沿つて冷却媒体 （22) を流して主軸頭 （ 4 ) を冷却する構成にしたことを特徴とする工作機械。 A machine tool characterized in that a cooling medium (22) is caused to flow along (30) to cool the spindle head (4).
PCT/JP1992/000788 1991-06-28 1992-06-19 Machine tool WO1993000200A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3/183851 1991-06-28
JP18385191A JPH058147A (en) 1991-06-28 1991-06-28 Machine tool

Publications (1)

Publication Number Publication Date
WO1993000200A1 true WO1993000200A1 (en) 1993-01-07

Family

ID=16142944

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1992/000788 WO1993000200A1 (en) 1991-06-28 1992-06-19 Machine tool

Country Status (2)

Country Link
JP (1) JPH058147A (en)
WO (1) WO1993000200A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3769911A4 (en) * 2018-03-20 2021-12-22 Makino Milling Machine Co., Ltd. Main spindle device of machine tool

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5483004B2 (en) * 2010-01-22 2014-05-07 Ｄｍｇ森精機株式会社 Machine Tools
JP2013169641A (en) * 2012-02-23 2013-09-02 Toshiba Mach Co Ltd Precision machine tool
JP5964159B2 (en) 2012-07-05 2016-08-03 東芝機械株式会社 Precision machine tools
JP5873526B2 (en) * 2014-05-07 2016-03-01 高松機械工業株式会社 Spindle base cooling tank

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278247U (en) * 1985-10-31 1987-05-19
JPS6342981Y2 (en) * 1980-08-26 1988-11-10
JPH0187845U (en) * 1987-12-02 1989-06-09
JPH01193142A (en) * 1988-01-26 1989-08-03 Kitamura Mach Co Ltd Machine tool
JPH01143338U (en) * 1988-03-25 1989-10-02

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6342981Y2 (en) * 1980-08-26 1988-11-10
JPS6278247U (en) * 1985-10-31 1987-05-19
JPH0187845U (en) * 1987-12-02 1989-06-09
JPH01193142A (en) * 1988-01-26 1989-08-03 Kitamura Mach Co Ltd Machine tool
JPH01143338U (en) * 1988-03-25 1989-10-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3769911A4 (en) * 2018-03-20 2021-12-22 Makino Milling Machine Co., Ltd. Main spindle device of machine tool

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