WO2011132314A1 - Structure for suppressing column heat deformation in machine tools - Google Patents

Structure for suppressing column heat deformation in machine tools Download PDF

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Publication number
WO2011132314A1
WO2011132314A1 PCT/JP2010/057261 JP2010057261W WO2011132314A1 WO 2011132314 A1 WO2011132314 A1 WO 2011132314A1 JP 2010057261 W JP2010057261 W JP 2010057261W WO 2011132314 A1 WO2011132314 A1 WO 2011132314A1
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Prior art keywords
saddle
column
sliding surface
cover
air supply
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PCT/JP2010/057261
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French (fr)
Japanese (ja)
Inventor
智治 長谷川
Original Assignee
三菱重工業株式会社
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Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to CN201080065028.3A priority Critical patent/CN102781621B/en
Priority to PCT/JP2010/057261 priority patent/WO2011132314A1/en
Publication of WO2011132314A1 publication Critical patent/WO2011132314A1/en

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    • 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
    • B23Q11/128—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling frame parts
    • 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
    • B23Q11/08—Protective coverings for parts of machine tools; Splash guards
    • B23Q11/0825—Relatively slidable coverings, e.g. telescopic

Definitions

  • the present invention relates to a column thermal deformation suppression structure for a machine tool that can suppress thermal deformation of the column.
  • a machine tool such as a horizontal boring machine is provided with a column formed in a hollow structure, and a saddle that rotatably supports a main shaft is slidably supported on the front surface of the column.
  • Some of these machine tools are provided with a sliding surface cover such as a telescopic cover and a bellows cover in order to protect the sliding surface of the column from chips and cutting water.
  • machine tools are designed with high rigidity so that the column is not thermally deformed by the influence of temperature changes around the machine and the heat generated by the machine itself.
  • the machine tool when the machine tool is provided with a sliding surface cover, the sliding surface of the column is difficult to come into contact with the outside air, and the sliding surface of the column slides due to the heat generated by the spindle driving means in the saddle.
  • the space surrounded by the inner surface of the face cover is kept at a high temperature.
  • the thermal balance of the column in the front-rear direction and the left-right direction is lost, and as a result, the column may be thermally deformed.
  • the straightness when the saddle slides is lowered, which may adversely affect the processing accuracy.
  • the column itself is heated and cooled by an actuator in accordance with the amount of thermal deformation of the column to control the expansion and contraction of the column.
  • an actuator in accordance with the amount of thermal deformation of the column to control the expansion and contraction of the column.
  • a number of sensors for detecting thermal deformation of the column and actuators for heating and cooling that are driven according to the detection result of the sensor must be provided inside and outside the column. Therefore, a large installation work is required.
  • the present invention solves the above-described problem, and an object thereof is to provide a column thermal deformation suppression structure for a machine tool that can suppress thermal deformation of the column without requiring a large installation work.
  • a column thermal deformation suppression structure for a machine tool according to a first invention for solving the above-described problem is as follows.
  • a saddle that rotatably supports a spindle on which a tool is detachably mounted;
  • a column having a sliding surface for slidably supporting the saddle;
  • a sliding surface cover provided so as to cover the sliding surface and extending and contracting as the saddle slides;
  • an air supply means for supplying air into the sliding surface cover.
  • a column thermal deformation suppression structure for a machine tool according to a second invention for solving the above-described problem is as follows.
  • the air supply means has a cover inner air supply passage extending along the sliding surface and penetrating the saddle, A cover inner injection hole communicating with the inside of the saddle and the inside of the sliding surface cover is formed in the cover inner air supply passage.
  • a column thermal deformation suppression structure for a machine tool that solves the above problem is as follows.
  • the air supply means has a saddle air supply passage communicating with the inside of the saddle,
  • a saddle injection hole connected to the saddle air supply passage and communicating with the inside of the sliding surface cover is formed in the saddle.
  • the column thermal deformation suppressing structure for a machine tool by providing the air supply means for supplying air into the telescopic cover, the column can be thermally deformed without requiring a large installation work. Can be suppressed.
  • a machine tool 1 that is a horizontal boring machine is provided with a bed 11 that is fixed to a floor surface F, and a column base 12 is placed horizontally on the bed 11. It is slidably supported in the direction. Further, a column 13 that is a hollow structure is erected on the upper surface of the column base 12, and a pair of left and right guide rails 14 a extending in the vertical direction is provided on a sliding surface 13 a that is a front surface of the column 13. , 14b are provided. A saddle 15 is slidably supported on the sliding surface 13a of the column 13 and the guide rails 14a and 14b, and a main shaft 16 is rotatably supported around the horizontal axis in the saddle 15. . A tool T is detachably attached to the tip of the main shaft 16, and a workpiece (not shown) is processed by the tool T.
  • An upper telescopic cover (sliding surface cover) 17 and a lower telescopic cover (sliding surface cover) 18 are provided above and below the saddle 15 so as to surround the sliding surface 13 a of the column 13.
  • the upper telescopic cover 17 and the lower telescopic cover 18 have a frame shape and a plurality of (four in FIG. 1) covers 17a, 17b, 17c, 17d and covers 18a, 18b, which are slidably stacked with each other. 18c and 18d.
  • a fixed cover 17a arranged at the uppermost position is fixed to the column 13, and movable covers 17b to 17d arranged below the fixed cover 17a are slidable on the column 13. It is supported by.
  • the movable cover 17 b to 17 d the movable cover 17 d disposed at the lowest position is fixed to the upper surface of the saddle 15.
  • a fixed cover 18a disposed at the lowest position is fixed to the column 13, and movable covers 18b to 18d disposed above the fixed cover 18a slide on the column 13. It is supported movably.
  • the movable cover 18d disposed at the uppermost position is fixed to the lower surface of the saddle 15.
  • the telescopic covers 17 and 18 can expand and contract in the vertical direction as the saddle 15 slides, so that the sliding surface 13a of the column 13 is shielded from the outside environment. .
  • the sliding surface 13a of the column 13 that slidably supports the saddle 15 is protected from chips, cutting water, and the like scattered during processing.
  • a blower (air supply means) 30 is provided on the upper surface of the column 13.
  • the blower 30 is configured to blow the taken outside air.
  • an air supply pipe (cover inner air supply passage) 41 is connected to the blower 30, and the air supply pipe 41 extends in the vertical direction along the sliding surface 13 a of the column 13, and A pipe is provided so as to penetrate the through hole 15 a of the saddle 15 in the middle.
  • the air supply pipe 41 has a plurality of injection holes (cover inner injection holes) 41a formed at predetermined intervals in the longitudinal direction.
  • the through hole 15 a communicates with the inside of the saddle 15.
  • the fan 30 is driven at the same time as the operation of the machine tool 1 is started, and the outside air taken in by the fan 30 is always in the saddle 15 and the telescopic covers 17 and 18. It comes to be supplied. Thereby, even if the telescopic covers 17 and 18 are provided, since the outside air can be directly supplied into the saddle 15 and the telescopic covers 17 and 18, the sliding surface 13a of the column 13 is sufficiently brought into contact with the outside air.
  • the telescopic covers 17 and 18 can be kept at the same temperature as that around the machine. As a result, since the thermal balance in the front-rear direction and the left-right direction in the column 13 can be kept constant, thermal deformation of the column 13 can be suppressed. Therefore, the straightness when the saddle 15 is slid can be maintained, and a reduction in machining accuracy can be prevented.
  • the column thermal deformation suppressing structure for a machine tool according to the present invention, the outside air taken in by the blower 30 provided on the upper surface of the column 13 is supplied along the sliding surface 13a of the column 13 by the air supply pipe 41. After that, the thermal deformation of the column 13 can be suppressed without requiring a large installation work by injecting into the saddle 15 and the telescopic covers 17 and 18 from the injection hole 41a. it can.
  • a blower 30 and a terminal box 51 are provided on the floor surface F opposite to the main shaft 16 (tool T) of the machine tool 1, and the side surface of the column base 12 and the column 13 are provided.
  • Terminal boxes 52 and 53 are provided on the side surface of the. Note that these terminal boxes 51 to 53 are structured to discharge the supplied air.
  • a hose 54 is connected between the blower 30 and the terminal box 51.
  • a drag chain type hose 55 and a connecting pipe 56 are connected between the terminal boxes 51 and 52 and between the terminal boxes 52 and 53. Further, a hose 57 is connected between the terminal box 53 and the saddle 15.
  • the terminal boxes 51, 52, 53, the hoses 54, 55, 57, and the connecting pipe 56 constitute a saddle air supply passage.
  • injection holes (saddle injection holes) 15 b and 15 c are formed on the upper surface and the lower surface of the saddle 15. Communicated with. One end of a bifurcated hose 57 disposed in the saddle 15 is connected to the injection holes 15b and 15c.
  • the blower 30 when the blower 30 is driven, the outside air around the machine tool 1 (column 13) is taken in by the blower 30, and then passed through the terminal boxes 51, 52, 53, hoses 54, 55, 57, and the connection pipe 56. , Are injected from the injection holes 15 b and 15 c of the saddle 15 and supplied into the telescopic covers 17 and 18. The outside air supplied into the telescopic covers 17 and 18 is exhausted from the upper opening of the upper telescopic cover 17 and the gaps between the covers 17a to 17d and the covers 18a to 18d.
  • the terminal boxes 52 and 53 are connected by the connecting pipe 56, and the terminal box 53 and the saddle 15 are connected by the hose 57, so that the column base 12 and the saddle 15 slide when the outside air is supplied. Even so, the connecting pipe 56 and the hose 57 can change the bending state according to their sliding positions. Therefore, the taken-in outside air is supplied smoothly.
  • the telescopic covers 17 and 18 are provided, since the outside air can be directly supplied into the saddle 15 and the telescopic covers 17 and 18, the sliding surface 13a of the column 13 is sufficiently brought into contact with the outside air.
  • the telescopic covers 17 and 18 can be kept at the same temperature as that around the machine.
  • the thermal balance in the front-rear direction and the left-right direction in the column 13 can be kept constant, thermal deformation of the column 13 can be suppressed. Therefore, the straightness when the saddle 15 is slid can be maintained, and a reduction in machining accuracy can be prevented.
  • the outside air taken in by the blower 30 provided on the floor F is connected to the terminal boxes 51, 52, 53, the hoses 54, 55, 57, and the connection pipe 56. Then, after being supplied into the saddle 15, the injection holes 15 b and 15 c are injected into the telescopic covers 17 and 18, so that the heat of the column 13 can be obtained without requiring a large installation work. Deformation can be suppressed.
  • the sliding surface cover is the telescopic cover 17 or 18, but may be a bellows cover.
  • the present invention can be applied to an inner surface of a telescopic cover composed of a plurality of cover members slidably stacked with each other and a telescopic cover device that removes foreign matters adhering to a sliding surface protected by the telescopic cover.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Machine Tool Units (AREA)

Abstract

Disclosed is a structure for suppressing column heat deformation in machine tools and which can suppress heat deformation of columns without requiring large-scale installation work. To achieve this, the structure is provided with: a saddle (15) for rotatably supporting a main spindle (16) to which a tool (T) is removably attached; a column (13) with a sliding surface (13a) which slidably supports the saddle (15); telescopic covers (17, 18) which expand and contract in accordance with the sliding of the saddle (15) and which are provided on the sliding surface (13a) of the column (13); and a blower (30) which supplies external air to inside the telescopic covers (17, 18).

Description

工作機械のコラム熱変形抑制構造Machine tool column thermal deformation suppression structure
　本発明は、コラムの熱変形を抑制することができる工作機械のコラム熱変形抑制構造に関する。 The present invention relates to a column thermal deformation suppression structure for a machine tool that can suppress thermal deformation of the column.
　一般に、横中ぐり盤等の工作機械には、中空構造に形成されたコラムが設けられており、このコラムの前面には、主軸を回転可能に支持するサドルが摺動可能に支持されている。このような工作機械の中には、コラムの摺動面を切粉や切削水等から保護するために、テレスコカバーやジャバラカバー等の摺動面カバーを備えたものが提供されている。また、工作機械においては、機械周囲の温度変化の影響や、機械自体から発生する熱の影響を受けて、コラムが熱変形をしないように、高い剛性を持って設計されている。 Generally, a machine tool such as a horizontal boring machine is provided with a column formed in a hollow structure, and a saddle that rotatably supports a main shaft is slidably supported on the front surface of the column. . Some of these machine tools are provided with a sliding surface cover such as a telescopic cover and a bellows cover in order to protect the sliding surface of the column from chips and cutting water. In addition, machine tools are designed with high rigidity so that the column is not thermally deformed by the influence of temperature changes around the machine and the heat generated by the machine itself.
　ところが、上述したように、工作機械に摺動面カバーを備えると、コラムの摺動面が外気に接触しにくくなると共に、サドル内の主軸駆動手段の発熱により、コラムの摺動面と摺動面カバーの内面との間に囲まれた空間内が高温に保持されることになる。これにより、コラムにおける前後方向及び左右方向の熱的バランスが崩れてしまい、結果的に、コラムの熱変形を招くおそれがある。このように、コラムに熱変形が生じると、サドルの摺動時における真直度が低下することになり、加工精度に悪影響を及ぼすおそれがあった。 However, as described above, when the machine tool is provided with a sliding surface cover, the sliding surface of the column is difficult to come into contact with the outside air, and the sliding surface of the column slides due to the heat generated by the spindle driving means in the saddle. The space surrounded by the inner surface of the face cover is kept at a high temperature. As a result, the thermal balance of the column in the front-rear direction and the left-right direction is lost, and as a result, the column may be thermally deformed. As described above, when the column is thermally deformed, the straightness when the saddle slides is lowered, which may adversely affect the processing accuracy.
　そこで、従来から、上述したような加工精度の低下に対処するために、コラムの熱変形を抑制する様々な手段が講じられている。このような、従来の工作機械のコラム熱変形抑制構造は、例えば、特許文献１に開示されている。 Therefore, conventionally, various measures for suppressing the thermal deformation of the column have been taken in order to cope with the above-described decrease in processing accuracy. Such a conventional column thermal deformation suppressing structure of a machine tool is disclosed in Patent Document 1, for example.
特公平７－４９１８１号公報Japanese Patent Publication No. 7-49181
　上記従来のコラム熱変形抑制構造では、コラムの熱変形量に応じて、コラム自体をアクチュエータにより加熱冷却して、コラムの伸縮制御を行うようにしている。しかしながら、このような従来の構成では、コラムの熱変形を検出するセンサや、このセンサの検出結果に応じて駆動する加熱用及び冷却用のアクチュエータを、コラムの内側及び外側に多数設けなければならず、大掛かりな設置作業が必要となってしまう。 In the conventional column thermal deformation suppression structure, the column itself is heated and cooled by an actuator in accordance with the amount of thermal deformation of the column to control the expansion and contraction of the column. However, in such a conventional configuration, a number of sensors for detecting thermal deformation of the column and actuators for heating and cooling that are driven according to the detection result of the sensor must be provided inside and outside the column. Therefore, a large installation work is required.
　従って、本発明は上記課題を解決するものであって、大掛かりな設置作業を必要とすることなく、コラムの熱変形を抑制することができる工作機械のコラム熱変形抑制構造を提供することを目的とする。 Accordingly, the present invention solves the above-described problem, and an object thereof is to provide a column thermal deformation suppression structure for a machine tool that can suppress thermal deformation of the column without requiring a large installation work. And
　上記課題を解決する第１の発明に係る工作機械のコラム熱変形抑制構造は、
　工具を着脱可能に装着する主軸を回転可能に支持するサドルと、
　前記サドルを摺動可能に支持する摺動面を有するコラムと、
　前記摺動面を覆うように設けられ、前記サドルの摺動に伴って伸縮する摺動面カバーと、
　前記摺動面カバー内に空気を供給する空気供給手段とを備える
　ことを特徴とする。 A column thermal deformation suppression structure for a machine tool according to a first invention for solving the above-described problem is as follows.
A saddle that rotatably supports a spindle on which a tool is detachably mounted;
A column having a sliding surface for slidably supporting the saddle;
A sliding surface cover provided so as to cover the sliding surface and extending and contracting as the saddle slides;
And an air supply means for supplying air into the sliding surface cover.
　上記課題を解決する第２の発明に係る工作機械のコラム熱変形抑制構造は、
　前記空気供給手段は、前記摺動面に沿って延在し、且つ、前記サドルを貫通するカバー内側空気供給通路を有し、
　前記カバー内側空気供給通路に、前記サドル内及び前記摺動面カバー内と連通するカバー内側噴射孔を形成する
　ことを特徴とする。 A column thermal deformation suppression structure for a machine tool according to a second invention for solving the above-described problem is as follows.
The air supply means has a cover inner air supply passage extending along the sliding surface and penetrating the saddle,
A cover inner injection hole communicating with the inside of the saddle and the inside of the sliding surface cover is formed in the cover inner air supply passage.
　上記課題を解決する第３に発明に係る工作機械のコラム熱変形抑制構造は、
　前記空気供給手段は、前記サドル内と連通するサドル空気供給通路を有し、
　前記サドルに、前記サドル空気供給通路と接続し、且つ、前記摺動面カバー内と連通するサドル噴射孔を形成する
　ことを特徴とする。 A column thermal deformation suppression structure for a machine tool according to a third aspect of the present invention that solves the above problem is as follows.
The air supply means has a saddle air supply passage communicating with the inside of the saddle,
A saddle injection hole connected to the saddle air supply passage and communicating with the inside of the sliding surface cover is formed in the saddle.
　従って、本発明に係る工作機械のコラム熱変形抑制構造によれば、テレスコカバー内に空気を供給する空気供給手段を備えることにより、大掛かりな設置作業を必要とすることなく、コラムの熱変形を抑制することができる。 Therefore, according to the column thermal deformation suppressing structure for a machine tool according to the present invention, by providing the air supply means for supplying air into the telescopic cover, the column can be thermally deformed without requiring a large installation work. Can be suppressed.
本発明の第１実施例に係る工作機械のコラム熱変形抑制構造の正面図である。It is a front view of the column thermal deformation suppression structure of the machine tool which concerns on 1st Example of this invention. 本発明の第１実施例に係る工作機械のコラム熱変形抑制構造の平面図である。It is a top view of the column thermal deformation suppression structure of the machine tool which concerns on 1st Example of this invention. 本発明の第２実施例に係る工作機械のコラム熱変形抑制構造の正面図である。It is a front view of the column thermal deformation suppression structure of the machine tool which concerns on 2nd Example of this invention. 本発明の第２実施例に係る工作機械のコラム熱変形抑制構造の側面図である。It is a side view of the column thermal deformation suppression structure of the machine tool which concerns on 2nd Example of this invention.
　以下、本発明に係る工作機械のコラム熱変形抑制構造について、図面を用いて詳細に説明する。 Hereinafter, a column thermal deformation suppressing structure for a machine tool according to the present invention will be described in detail with reference to the drawings.
　先ず、本発明に係る第１実施例について、図１及び図２を用いて詳細に説明する。 First, a first embodiment according to the present invention will be described in detail with reference to FIGS.
　図１及び図２に示すように、横中ぐり盤である工作機械１には、床面Ｆに固定されるベッド１１が設けられており、このベッド１１の上部には、コラムベース１２が水平方向に摺動可能に支持されている。また、コラムベース１２の上面には、中空構造物であるコラム１３が立設されており、このコラム１３の正面である摺動面１３ａには、鉛直方向に延在する左右一対のガイドレール１４ａ，１４ｂが設けられている。これらコラム１３の摺動面１３ａ及びガイドレール１４ａ，１４ｂには、サドル１５が摺動可能に支持されており、このサドル１５内には、主軸１６が水平軸回りに回転可能に支持されている。そして、主軸１６の先端には、工具Ｔが着脱可能に装着されており、この工具Ｔにより図示しないワークの加工が行われる。 As shown in FIGS. 1 and 2, a machine tool 1 that is a horizontal boring machine is provided with a bed 11 that is fixed to a floor surface F, and a column base 12 is placed horizontally on the bed 11. It is slidably supported in the direction. Further, a column 13 that is a hollow structure is erected on the upper surface of the column base 12, and a pair of left and right guide rails 14 a extending in the vertical direction is provided on a sliding surface 13 a that is a front surface of the column 13. , 14b are provided. A saddle 15 is slidably supported on the sliding surface 13a of the column 13 and the guide rails 14a and 14b, and a main shaft 16 is rotatably supported around the horizontal axis in the saddle 15. . A tool T is detachably attached to the tip of the main shaft 16, and a workpiece (not shown) is processed by the tool T.
　サドル１５の上部及び下部には、上部テレスコカバー（摺動面カバー）１７及び下部テレスコカバー（摺動面カバー）１８がコラム１３の摺動面１３ａを囲むように設けられている。これら上部テレスコカバー１７及び下部テレスコカバー１８は、枠状で、且つ、互いにスライド可能に積層された複数（図１においては４枚ずつ）のカバー１７ａ，１７ｂ，１７ｃ，１７ｄ及びカバー１８ａ，１８ｂ，１８ｃ，１８ｄから構成されている。 An upper telescopic cover (sliding surface cover) 17 and a lower telescopic cover (sliding surface cover) 18 are provided above and below the saddle 15 so as to surround the sliding surface 13 a of the column 13. The upper telescopic cover 17 and the lower telescopic cover 18 have a frame shape and a plurality of (four in FIG. 1) covers 17a, 17b, 17c, 17d and covers 18a, 18b, which are slidably stacked with each other. 18c and 18d.
　上部テレスコカバー１７においては、その最上位に配置される固定カバー１７ａは、コラム１３に固定されており、この固定カバー１７ａの下方に配置される可動カバー１７ｂ～１７ｄは、コラム１３に摺動可能に支持されている。そして、可動カバー１７ｂ～１７ｄのうち、これらの最下位に配置される可動カバー１７ｄは、サドル１５の上面に固定されている。 In the upper telescopic cover 17, a fixed cover 17a arranged at the uppermost position is fixed to the column 13, and movable covers 17b to 17d arranged below the fixed cover 17a are slidable on the column 13. It is supported by. Of the movable covers 17 b to 17 d, the movable cover 17 d disposed at the lowest position is fixed to the upper surface of the saddle 15.
　また、下部テレスコカバー１８においては、その最下位に配置される固定カバー１８ａは、コラム１３に固定されており、この固定カバー１８ａの上方に配置される可動カバー１８ｂ～１８ｄは、コラム１３に摺動可能に支持されている。そして、可動カバー１８ｂ～１８ｄのうち、これらの最上位に配置される可動カバー１８ｄは、サドル１５の下面に固定されている。 Further, in the lower telescopic cover 18, a fixed cover 18a disposed at the lowest position is fixed to the column 13, and movable covers 18b to 18d disposed above the fixed cover 18a slide on the column 13. It is supported movably. Of the movable covers 18b to 18d, the movable cover 18d disposed at the uppermost position is fixed to the lower surface of the saddle 15.
　従って、テレスコカバー１７，１８は、サドル１５の摺動に伴って、全体として上下方向に伸縮可能となっており、コラム１３の摺動面１３ａをその外側の環境から遮断するようになっている。これにより、サドル１５を摺動可能に支持するコラム１３の摺動面１３ａは、加工時に飛散した切粉や切削水等から保護されることになる。 Accordingly, the telescopic covers 17 and 18 can expand and contract in the vertical direction as the saddle 15 slides, so that the sliding surface 13a of the column 13 is shielded from the outside environment. . Thereby, the sliding surface 13a of the column 13 that slidably supports the saddle 15 is protected from chips, cutting water, and the like scattered during processing.
　コラム１３の上面には、送風機（空気供給手段）３０が設けられている。この送風機３０は、取り込んだ外気を送風する構成となっている。また、送風機３０には、空気供給管（カバー内側空気供給通路）４１が接続されており、この空気供給管４１は、コラム１３の摺動面１３ａに沿うように鉛直方向に延在し、その途中でサドル１５の貫通孔１５ａを貫通するように配管されている。そして、空気供給管４１には、複数の噴射孔（カバー内側噴射孔）４１ａがその長手方向に所定間隔に形成されている。なお、貫通孔１５ａは、サドル１５内と連通するものである。 A blower (air supply means) 30 is provided on the upper surface of the column 13. The blower 30 is configured to blow the taken outside air. In addition, an air supply pipe (cover inner air supply passage) 41 is connected to the blower 30, and the air supply pipe 41 extends in the vertical direction along the sliding surface 13 a of the column 13, and A pipe is provided so as to penetrate the through hole 15 a of the saddle 15 in the middle. The air supply pipe 41 has a plurality of injection holes (cover inner injection holes) 41a formed at predetermined intervals in the longitudinal direction. The through hole 15 a communicates with the inside of the saddle 15.
　従って、送風機３０を駆動すると、工作機械１（コラム１３）の周囲の外気は、送風機３０により取り込まれた後、空気供給管４１の噴射孔４１ａから噴射されて、サドル１５内及びテレスコカバー１７，１８内に供給される。そして、サドル１５内及びテレスコカバー１７，１８内に供給された外気は、上部テレスコカバー１７の上開口部や、各カバー１７ａ～１７ｄ間及び各カバー１８ａ～１８ｄ間の隙間から排気されることになる。 Therefore, when the blower 30 is driven, the outside air around the machine tool 1 (column 13) is taken in by the blower 30, and then injected from the injection hole 41a of the air supply pipe 41, and the inside of the saddle 15 and the telescopic cover 17, 18 is supplied. The outside air supplied into the saddle 15 and the telescopic covers 17 and 18 is exhausted from the upper opening of the upper telescopic cover 17 and the gaps between the covers 17a to 17d and the covers 18a to 18d. Become.
　ここで、工作機械１の運転が開始されると同時に、送風機３０は駆動されるようになっており、この送風機３０により取り込まれた外気は、常に、サドル１５内及びテレスコカバー１７，１８内に供給されるようになっている。これにより、テレスコカバー１７，１８を備えたとしても、サドル１５内及びテレスコカバー１７，１８内に、直接外気を供給することができるので、コラム１３の摺動面１３ａを外気に十分接触させることができると共に、テレスコカバー１７，１８内を機械周囲の温度と同じ温度に保持することができる。この結果、コラム１３における前後方向及び左右方向の熱的バランスを一定に保つことができるので、コラム１３の熱変形を抑制することができる。よって、サドル１５の摺動時における真直度を保つことができ、加工精度の低下を防止することができる。 Here, the fan 30 is driven at the same time as the operation of the machine tool 1 is started, and the outside air taken in by the fan 30 is always in the saddle 15 and the telescopic covers 17 and 18. It comes to be supplied. Thereby, even if the telescopic covers 17 and 18 are provided, since the outside air can be directly supplied into the saddle 15 and the telescopic covers 17 and 18, the sliding surface 13a of the column 13 is sufficiently brought into contact with the outside air. The telescopic covers 17 and 18 can be kept at the same temperature as that around the machine. As a result, since the thermal balance in the front-rear direction and the left-right direction in the column 13 can be kept constant, thermal deformation of the column 13 can be suppressed. Therefore, the straightness when the saddle 15 is slid can be maintained, and a reduction in machining accuracy can be prevented.
　従って、本発明に係る工作機械のコラム熱変形抑制構造によれば、コラム１３の上面に設けた送風機３０により取り込んだ外気を、空気供給管４１によってコラム１３の摺動面１３ａに沿うように供給した後、その噴射孔４１ａからサドル１５内及びテレスコカバー１７，１８内に向けて噴射するようにしたことにより、大掛かりな設置作業を必要とすることなく、コラム１３の熱変形を抑制することができる。 Therefore, according to the column thermal deformation suppressing structure for a machine tool according to the present invention, the outside air taken in by the blower 30 provided on the upper surface of the column 13 is supplied along the sliding surface 13a of the column 13 by the air supply pipe 41. After that, the thermal deformation of the column 13 can be suppressed without requiring a large installation work by injecting into the saddle 15 and the telescopic covers 17 and 18 from the injection hole 41a. it can.
　次に、本発明に係る第２実施例について、図３及び図４を用いて詳細に説明する。なお、第１実施例において説明した部材と同一の部材には、同一の符号を付し、重複した説明を省略する。 Next, a second embodiment according to the present invention will be described in detail with reference to FIGS. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Example, and the duplicate description is abbreviate | omitted.
　図３及び図４に示すように、工作機械１の主軸１６（工具Ｔ）と反対側の床面Ｆには、送風機３０及びターミナルボックス５１が設けられており、コラムベース１２の側面及びコラム１３の側面には、ターミナルボックス５２，５３が設けられている。なお、これらターミナルボックス５１～５３は、供給された空気を排出する構造となっている。 As shown in FIGS. 3 and 4, a blower 30 and a terminal box 51 are provided on the floor surface F opposite to the main shaft 16 (tool T) of the machine tool 1, and the side surface of the column base 12 and the column 13 are provided. Terminal boxes 52 and 53 are provided on the side surface of the. Note that these terminal boxes 51 to 53 are structured to discharge the supplied air.
　送風機３０とターミナルボックス５１との間には、ホース５４が接続されている。また、ターミナルボックス５１，５２間及びターミナルボックス５２，５３間には、ドラグチェーン式のホース５５及び接続管５６が接続されている。更に、ターミナルボックス５３とサドル１５との間には、ホース５７が接続されている。なお、ターミナルボックス５１，５２，５３、ホース５４，５５，５７、接続管５６は、サドル空気供給通路を構成するものである。 A hose 54 is connected between the blower 30 and the terminal box 51. A drag chain type hose 55 and a connecting pipe 56 are connected between the terminal boxes 51 and 52 and between the terminal boxes 52 and 53. Further, a hose 57 is connected between the terminal box 53 and the saddle 15. The terminal boxes 51, 52, 53, the hoses 54, 55, 57, and the connecting pipe 56 constitute a saddle air supply passage.
　また、サドル１５の上面及び下面には、噴射孔（サドル噴射孔）１５ｂ，１５ｃが形成されており、噴射孔１５ｂは上部テレスコカバー１７内と連通する一方、噴射孔１５ｃは下部テレスコカバー１８内と連通している。そして、これら噴射孔１５ｂ，１５ｃには、サドル１５内に配置される２股状のホース５７の一端が接続されている。 Further, injection holes (saddle injection holes) 15 b and 15 c are formed on the upper surface and the lower surface of the saddle 15. Communicated with. One end of a bifurcated hose 57 disposed in the saddle 15 is connected to the injection holes 15b and 15c.
　従って、送風機３０を駆動すると、工作機械１（コラム１３）の周囲の外気は、送風機３０により取り込まれた後、ターミナルボックス５１，５２，５３、ホース５４，５５，５７、接続管５６を介して、サドル１５の噴射孔１５ｂ，１５ｃから噴射されて、テレスコカバー１７，１８内に供給される。そして、テレスコカバー１７，１８内に供給された外気は、上部テレスコカバー１７の上開口部や、各カバー１７ａ～１７ｄ間及び各カバー１８ａ～１８ｄ間の隙間から排気されることになる。 Therefore, when the blower 30 is driven, the outside air around the machine tool 1 (column 13) is taken in by the blower 30, and then passed through the terminal boxes 51, 52, 53, hoses 54, 55, 57, and the connection pipe 56. , Are injected from the injection holes 15 b and 15 c of the saddle 15 and supplied into the telescopic covers 17 and 18. The outside air supplied into the telescopic covers 17 and 18 is exhausted from the upper opening of the upper telescopic cover 17 and the gaps between the covers 17a to 17d and the covers 18a to 18d.
　また、ターミナルボックス５２，５３間を接続管５６により接続すると共に、ターミナルボックス５３とサドル１５との間をホース５７により接続することにより、外気供給時において、コラムベース１２及びサドル１５が摺動しても、接続管５６及びホース５７がそれらの摺動位置に応じて湾曲状態を変えることができる。よって、取り込んだ外気は、スムーズに供給されることになる。 In addition, the terminal boxes 52 and 53 are connected by the connecting pipe 56, and the terminal box 53 and the saddle 15 are connected by the hose 57, so that the column base 12 and the saddle 15 slide when the outside air is supplied. Even so, the connecting pipe 56 and the hose 57 can change the bending state according to their sliding positions. Therefore, the taken-in outside air is supplied smoothly.
　これにより、テレスコカバー１７，１８を備えたとしても、サドル１５内及びテレスコカバー１７，１８内に、直接外気を供給することができるので、コラム１３の摺動面１３ａを外気に十分接触させることができると共に、テレスコカバー１７，１８内を機械周囲の温度と同じ温度に保持することができる。この結果、コラム１３における前後方向及び左右方向の熱的バランスを一定に保つことができるので、コラム１３の熱変形を抑制することができる。よって、サドル１５の摺動時における真直度を保つことができ、加工精度の低下を防止することができる。 Thereby, even if the telescopic covers 17 and 18 are provided, since the outside air can be directly supplied into the saddle 15 and the telescopic covers 17 and 18, the sliding surface 13a of the column 13 is sufficiently brought into contact with the outside air. The telescopic covers 17 and 18 can be kept at the same temperature as that around the machine. As a result, since the thermal balance in the front-rear direction and the left-right direction in the column 13 can be kept constant, thermal deformation of the column 13 can be suppressed. Therefore, the straightness when the saddle 15 is slid can be maintained, and a reduction in machining accuracy can be prevented.
　従って、本発明に係る工作機械のコラム熱変形抑制構造によれば、フロアＦに設けた送風機３０により取り込んだ外気を、ターミナルボックス５１，５２，５３、ホース５４，５５，５７、接続管５６を介して、サドル１５内に供給した後、その噴射孔１５ｂ，１５ｃからテレスコカバー１７，１８内に向けて噴射するようにしたことにより、大掛かりな設置作業を必要とすることなく、コラム１３の熱変形を抑制することができる。 Therefore, according to the column thermal deformation suppression structure for a machine tool according to the present invention, the outside air taken in by the blower 30 provided on the floor F is connected to the terminal boxes 51, 52, 53, the hoses 54, 55, 57, and the connection pipe 56. Then, after being supplied into the saddle 15, the injection holes 15 b and 15 c are injected into the telescopic covers 17 and 18, so that the heat of the column 13 can be obtained without requiring a large installation work. Deformation can be suppressed.
　なお、上述した実施形態においては、摺動面カバーをテレスコカバー１７，１８としたが、ジャバラカバーとしても構わない。 In the above-described embodiment, the sliding surface cover is the telescopic cover 17 or 18, but may be a bellows cover.
　本発明は、互いにスライド可能に積層された複数のカバー部材からなるテレスコカバー内面や、このテレスコカバーが保護する摺動面に付着した異物を除去するテレスコカバー装置に適用可能である。 The present invention can be applied to an inner surface of a telescopic cover composed of a plurality of cover members slidably stacked with each other and a telescopic cover device that removes foreign matters adhering to a sliding surface protected by the telescopic cover.

Claims (3)

  1. 　工具を着脱可能に装着する主軸を回転可能に支持するサドルと、
    　前記サドルを摺動可能に支持する摺動面を有するコラムと、
    　前記摺動面を覆うように設けられ、前記サドルの摺動に伴って伸縮する摺動面カバーと、
    　前記摺動面カバー内に空気を供給する空気供給手段とを備える
    　ことを特徴とする工作機械のコラム熱変形抑制構造。     A saddle that rotatably supports a spindle on which a tool is detachably mounted;
    A column having a sliding surface for slidably supporting the saddle;
    A sliding surface cover provided so as to cover the sliding surface and extending and contracting as the saddle slides;
    An air supply means for supplying air into the sliding surface cover. A structure for suppressing column thermal deformation of a machine tool.
  2. 　請求項１に記載の工作機械のコラム熱変形抑制構造において、
    　前記空気供給手段は、前記摺動面に沿って延在し、且つ、前記サドルを貫通するカバー内側空気供給通路を有し、
    　前記カバー内側空気供給通路に、前記サドル内及び前記摺動面カバー内と連通するカバー内側噴射孔を形成する
    　ことを特徴とする工作機械のコラム熱変形抑制構造。     In the column thermal deformation suppression structure of the machine tool according to claim 1,
    The air supply means has a cover inner air supply passage extending along the sliding surface and penetrating the saddle,
    A cover inner injection hole communicating with the inside of the saddle and the inside of the sliding surface cover is formed in the cover inner air supply passage.
  3. 　請求項１に記載の工作機械のコラム熱変形抑制構造において、
    　前記空気供給手段は、前記サドル内と連通するサドル空気供給通路を有し、
    　前記サドルに、前記サドル空気供給通路と接続し、且つ、前記摺動面カバー内と連通するサドル噴射孔を形成する
    　ことを特徴とする工作機械のコラム熱変形抑制構造。     In the column thermal deformation suppression structure of the machine tool according to claim 1,
    The air supply means has a saddle air supply passage communicating with the inside of the saddle,
    A saddle injection hole connected to the saddle air supply passage and communicating with the inside of the sliding surface cover is formed in the saddle. A structure for suppressing column thermal deformation of a machine tool.
PCT/JP2010/057261 2010-04-23 2010-04-23 Structure for suppressing column heat deformation in machine tools WO2011132314A1 (en)

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