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KR20190143634A - Machine for high weight with fine flow distribution valve - Google Patents

Machine for high weight with fine flow distribution valve Download PDF

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Publication number
KR20190143634A
KR20190143634A KR1020180071356A KR20180071356A KR20190143634A KR 20190143634 A KR20190143634 A KR 20190143634A KR 1020180071356 A KR1020180071356 A KR 1020180071356A KR 20180071356 A KR20180071356 A KR 20180071356A KR 20190143634 A KR20190143634 A KR 20190143634A
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KR
South Korea
Prior art keywords
shaft
machine tool
housing
heavy weight
flow rate
Prior art date
Application number
KR1020180071356A
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Korean (ko)
Inventor
주대홍
정우갑
김태윤
김동윤
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주대홍
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Application filed by 주대홍 filed Critical 주대홍
Priority to KR1020180071356A priority Critical patent/KR20190143634A/en
Publication of KR20190143634A publication Critical patent/KR20190143634A/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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/38—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using fluid bearings or fluid cushion supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
    • B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
    • F16C32/064—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Turning (AREA)

Abstract

The present invention relates to a machine tool for heavy weight, including a fine flow distribution valve. Specifically, the machine tool for heavy weight includes: a housing; a gear installed on the inner circumference of the housing; a shaft inserted into a center shaft of the gear; a rotation table installed on the shaft; and a hydrostatic bearing device supporting the shaft to rotate by not being in contact. A centering ball bearing unit supporting the rotation table to rotate is installed on the inner side of the shaft on the upper surface of the housing. An axial hydraulic bearing pad facing the rotation table is installed on the outer side of the shaft on the upper surface of the housing. Multiple supply holes are formed on the axial hydraulic bearing pad, and a pressed fluid for supporting a gap with the rotation table by a hydrostatic pressure is individually supplied to the multiple supply holes. Each of the multiple supply holes individually has a working fluid supply valve supplying the pressed fluid. Therefore, the machine tool for heavy weight controls a fixed flow rate regardless of variables such as a load pressure or a supply pressure when rotating and, therefore, can reduce flow distribution errors. So, the machine tool for heavy weight can improve surface roughness of a processed product by obtaining durability and a smooth movement. Therefore, the machine tool for heavy weight can achieve accurate size tolerance.

Description

미세유량 분배 밸브가 설치된 고중량용 공작기계{Machine for high weight with fine flow distribution valve}Machine for high weight with fine flow distribution valve

본 발명은 미세유량 분배 밸브가 설치된 고중량용 공작기계에 관한 것으로, 보다 상세하게는 하중압력이나 공급압력 등의 변수에 관계없이 일정한 비율로 유량을 제어하여 유량분할오차를 줄일 수 있는 대형 부품을 가공할 수 있는 미세유량 분배 밸브가 설치된 고중량용 공작기계에 관한 것이다.The present invention relates to a heavy-weight machine tool equipped with a micro flow rate distribution valve, and more particularly, to process a large part capable of reducing a flow split error by controlling the flow rate at a constant rate regardless of variables such as load pressure and supply pressure. A heavy weight machine tool provided with a micro flow rate dispensing valve.

최근 다양한 대형 공작기계가 산업분야에 널리 보급되고 있다. 대형 공작기계는 필수 구조의 일부를 분해하지 않으면 운반할 수 없는 기계를 대형 공작기계라고 한다. 또한, 필수 주요 구조의 일부품(예를 들면 테이블)조차 분해하지 않으면 운반할 수 없는 기계를 초대형 공작기계라고 한다. 이러한 대형 공작기계에는 테이블이 유압에 의해 회전되도록 하는 유정압 장치가 설치되어 있다. Recently, various large machine tools are widely used in the industrial field. Large machine tools are machines that cannot be transported without disassembling some of the essential structures. In addition, machines that cannot be transported without disassembling even parts of essential structural structures (eg tables) are called extra-large machine tools. Such a large machine tool is provided with a hydrostatic pressure device for causing the table to rotate by hydraulic pressure.

그러나, 유정압 구름 방식을 사용한 시스템은 연삭기의 회전 주축과 축의 저어널부분에 국내 기술이 적용되고 있지만, 수직형 대형 회전척의 경우는 반경방향 접촉면적이 넓고 테이블의 부상높이 차이가 크면 가공정밀도가 떨어지므로 아직까지 국내의 기술은 적용하지 못하고 있다.However, in the hydrostatic rolling system, domestic technology is applied to the rotating spindle of the grinding machine and the journal part of the shaft.However, in the case of vertical large rotary chucks, the processing accuracy is large when the radial contact area is large and the difference in the height of the table is large. As it falls, domestic technology has not been applied so far.

또한, 종래의 대형 수직선반에서 유정압 베어링을 적용한 회전척은 회전상태에서 일정한 유압을 공급받기 우해서는 분배밸브의 역할이 매우 중요한데 기존의 유정압 장치는 작동유체를 공급하는 분배밸브에 있어서 12군데 밸브에 보통 4개씩 묶어서 작동유체를 공급하다가 보니 분배밸브 간의 밸런스가 맞지 않고 불균형하게 제공되어 제품 소재의 형태에 따라서 평면이 제대로 나오지 않아서 편차가 많이 나는 문제점이 있었다.In addition, the rotary chuck applied with the hydrostatic bearing in the conventional large vertical shelf is very important for the distribution valve to receive a constant hydraulic pressure in the rotating state. The existing hydrostatic device has 12 positions in the distribution valve for supplying the working fluid. As a result of supplying working fluid by tying four valves to the valve, the balance between the distribution valves is not balanced and provided unbalanced, so the plane does not come out properly according to the shape of the product.

한편, 바깥쪽 Axial 베어링은 파이가 크기 때문에 베어링을 설치하려면 단가가 많이 들어가는 문제점이 있었다.On the other hand, since the outer Axial bearing has a large pie, there was a problem that a lot of unit cost to install the bearing.

따라서, 본 발명이 해결하고자 하는 과제는 대형 공작기계에 적용되는 베어링 장치로서, 가운데 축 센터링에만 기계적인 볼 베어링을 설치하고 회전테이블 바깥쪽과 가공제품 사이에는 유정압 베어링장치를 제공하여 하중압력이나 공급압력 등의 변수에 관계없이 일정한 비율로 유량을 제어하여 유량분할오차를 줄일 수 있는 미세유량 분배 밸브가 설치된 고중량용 공작기계를 제공하는 데 있다.Therefore, the problem to be solved by the present invention is a bearing device applied to a large machine tool, installs a mechanical ball bearing only in the center shaft centering and provides a hydrostatic bearing device between the outside of the rotary table and the processed product, The present invention provides a heavy weight machine tool equipped with a micro flow rate distribution valve that can reduce a flow split error by controlling a flow rate at a constant rate regardless of variables such as supply pressure.

또한, 본 발명이 해결하고자 하는 과제는 샤프트를 회전가능하게 비접촉 지지하는 유정압 베어링 장치가 회전테이블 바깥쪽에 둘러서 홀들이 가공되어 있는데 홀에서 기름이 나와서 회전테이블로 공급했을 때 때 각 홀에서 쏘는 유량 및 유압이 동일하도록 각각의 홀 하나하나 마다에 분배밸브, 유량계 및 압력계를 제공하여 균등한 지지력을 제공할 수 있는 미세유량 분배 밸브가 설치된 고중량용 공작기계를 제공하는 데 있다.In addition, the problem to be solved by the present invention is that the hydrostatic bearing device for rotatably supporting the shaft rotatably outside the rotary table, the holes are processed, when the oil flows from the hole when the oil is supplied to the rotary table from the hole And providing a distribution valve, a flow meter, and a pressure gauge in each of the holes so that the hydraulic pressure is the same.

상기한 목적을 달성하기 위하여 본 발명에 따른 미세유량 분배 밸브가 설치된 고중량용 공작기계는 하우징과, 상기 하우징의 내경부에 설치된 기어와, 상기 기어의 중심축에 삽입된 샤프트와, 상기 샤프트에 장착된 회전테이블과, 상기 샤프트를 회전가능하게 비접촉 지지하는 유정압 베어링 장치가 포함된 공작기계에 있어서, 상기 하우징의 상면의 샤프트의 내측 위치에서 회전테이블을 회전 가능하게 지지하는 센터링 볼 베어링부가 설치되고, 상기 하우징의 상면의 샤프트의 외측 위치에서 회전테이블과 대향하는 축상(Axial) 유압베어링 패드를 가지며, 상기 축상 유압베어링 패드에 상기 회전테이블과의 간극에 유정압으로 지지하기 위한 압유가 각각 공급되는 공급홀이 복수 개 이상 형성되어 있으며, 상기 복수 개로 형성된 각각의 공급홀은 압유를 공급하는 작동유체 공급밸브가 각각 따로 형성되어 있는 것이 바람직하다.In order to achieve the above object, a heavy-weight machine tool equipped with a microfluidic distribution valve according to the present invention includes a housing, a gear installed in an inner diameter portion of the housing, a shaft inserted into a central axis of the gear, and mounted on the shaft. A machine tool including a rotary table and a hydrostatic bearing device for rotatably supporting the shaft in a non-contact manner, the machine tool comprising: a centering ball bearing portion rotatably supporting the rotary table at an inner position of the shaft on an upper surface of the housing, And an axial hydraulic bearing pad facing the rotary table at an outer position of the shaft on the upper surface of the housing, wherein hydraulic oil is supplied to the axial hydraulic bearing pad for supporting with a positive pressure in a gap with the rotary table. At least a plurality of supply holes are formed, and each of the plurality of supply holes is a hydraulic oil. The working fluid supply valve for each supply is preferably formed separately.

그리고, 본 발명에 따른 상기 작동유체 공급밸브는 미세유량 분배 밸브인 것이 더욱 바람직하다.Further, the working fluid supply valve according to the present invention is more preferably a fine flow rate distribution valve.

그리고, 본 발명에 따른 상기 작동유체 공급밸브는 압력보상형 유량조절밸브인 것이 더욱 바람직하다.Further, the working fluid supply valve according to the present invention is more preferably a pressure compensation type flow control valve.

이상과 같은 구성의 본 발명의 미세유량 분배 밸브가 설치된 고중량용 공작기계에 따르면 회전시 하중압력이나 공급압력 등의 변수에 관계없이 일정한 비율로 유량을 제어하여 유량분할오차를 줄일 수 있어 내구성과 움직임이 원활하여 공작기계의 밸런스 등이 향상되어 정밀치수 공차를 달성할 수 있는 효과가 있다.According to the heavy-weight machine tool provided with the microfluidic flow distribution valve of the present invention as described above, it is possible to reduce the flow rate division error by controlling the flow rate at a constant rate regardless of variables such as the load pressure and the supply pressure during rotation. This smoothly improves the balance of the machine tool has the effect of achieving a precision dimension tolerance.

그리고, 본 발명의 미세유량 분배 밸브가 설치된 고중량용 공작기계에 따르면 기존의 유정압 베어링 구조보다 진동 감쇄력이 크고, 소음이 적으며, 회전속도를 증가할 수 있고 무접촉으로 반영구적 사용이 가능한 효과가 있다.In addition, according to the heavy-weight machine tool installed with the micro flow rate distribution valve of the present invention, the vibration damping force is larger than the conventional hydrostatic bearing structure, the noise is low, the rotational speed can be increased, and the contactless use can be used semi-permanently. have.

도 1은 본 발명에 따른 미세유량 분배 밸브가 설치된 고중량 공작기계의 회전 테이블 장치의 전체 조립단면도1 is an overall assembly cross-sectional view of a rotary table device of a heavy machine tool installed with a micro flow rate distribution valve according to the present invention;

본 발명에 따른 미세유량 분배 밸브가 설치된 고중량용 공작기계는 다양한 변경을 가할 수 있고 여러 가지 실시예를 가질 수 있는바, 특정 실시예들을 도면에 예시하고 상세한 설명에 상세하게 설명하고자 한다. 그러나, 이는 본 발명을 특정한 실시 형태에 대해 한정하려는 것이 아니며, 본 발명의 기술적 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.Heavy-weight machine tools equipped with a microfluidic distribution valve according to the present invention may be modified in various ways and have various embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the technical spirit and scope of the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 미세유량 분배 밸브가 설치된 고중량 공작기계의 전체 조립단면도가 도 1에 도시되어 있다.An overall assembly cross-sectional view of a heavy machine tool with a microfluidic distribution valve according to the invention is shown in FIG. 1.

도 1을 참조하면, 본 발명에 따르면 하우징(10)과, 상기 하우징(10)의 내경부에 설치된 기어(20)와, 상기 기어(20)의 중심축에 삽입된 샤프트(30)와, 회전하는 샤프트(30)에 회전테이블(40)이 체결되어 있어 모터의 동력이 가해지면 회전테이블(40)이 회전 이송을 할 수 있도록 되어 있으며, 상기 샤프트(30)를 회전가능하게 비접촉 지지하는 유정압 베어링 장치(50)가 포함된다.Referring to FIG. 1, according to the present invention, a housing 10, a gear 20 installed in an inner diameter portion of the housing 10, a shaft 30 inserted into a central axis of the gear 20, and rotation The rotary table 40 is fastened to the shaft 30, and when the power of the motor is applied, the rotary table 40 is capable of rotational transfer, and an oil pressure for rotatably supporting the shaft 30 in a non-contact manner. A bearing device 50 is included.

여기서 상기 하우징(10)의 상면의 샤프트(30)의 내측 위치에서 회전테이블(40)을 회전 가능하게 지지하는 센터링 볼 베어링부(100)가 설치되어 있다. 상기 센터링 볼 베어링부(100)는 하우징(10)의 상면에 상부 방향으로 4군데 내지 8군데가 형성되어 있어, 가공제품에 관한 축방향 모멘트에 대한 지지력을 향상시킨다.Here, the centering ball bearing part 100 for rotatably supporting the rotary table 40 at the inner position of the shaft 30 on the upper surface of the housing 10 is provided. The centering ball bearing part 100 is formed in four to eight places in the upper direction on the upper surface of the housing 10, thereby improving the bearing capacity for the axial moment with respect to the workpiece.

그리고, 상기 하우징(10)의 상면의 샤프트(30)의 외측 위치에서 회전테이블(40)과 대향하는 축상(Axial) 유압베어링 패드(200)를 가진다. 축상 유압베어링 패드(200)는 그 내경부에 하우징(10)의 상면으로 공급오일이 유입될 수 있도록 공급홀(210)이 형성되어 있다. 상기 공급오일은 유압 오일, 웨이 오일(way oils), 윤활유, 탭핑 오일(tapping oils) 및 기어 박스 오일 등이 사용될 수 있다. 복수 개로 형성된 공급홀(210)은 압유를 공급하는 작동유체 공급밸브(300)가 각각 형성되어 있다. And, it has an axial hydraulic bearing pad 200 facing the rotary table 40 at the outer position of the shaft 30 on the upper surface of the housing 10. The axial hydraulic bearing pad 200 has a supply hole 210 formed therein so that the supply oil can flow into the upper surface of the housing 10. The feed oil may be hydraulic oil, way oils, lubricating oils, tapping oils and gear box oils. The plurality of supply holes 210 are provided with a working fluid supply valve 300 for supplying the pressurized oil, respectively.

상기 공급홀(210)을 통하여 공급되는 공급오일은 회전하는 회전테이블(40)와 일정 틈새(0.003~0.005미크론)를 유지하도록 구성되는데, 여기서 상기 공급홀(210)에 일정한 유압을 공급받기 위해서는 별도의 유량계와 유압계를 함께 설치하여 유량분할오차를 줄여서 정밀하게 제어할 수 있을 것이다.Supply oil supplied through the supply hole 210 is configured to maintain a rotating table 40 and a predetermined gap (0.003 ~ 0.005 microns) to rotate, where the separate supply to receive a constant hydraulic pressure to the supply hole 210 By installing a flowmeter and a hydraulic system together, the flow splitting error can be reduced and precisely controlled.

또한, 상기 유정압 베어링 장치(50)는 냉각장치(미도시)를 더 포함하여, 유온과 유지 점도를 일정하게 유지시킴과 아울러 오일의 열 쇼크를 최소화하여 피가공물의 열변위를 최소화시킬 수 있다 이를 통하여 공작기계를 통하여 가공된 피가공물의 가공정밀도를 향상시킬 수 있다.In addition, the hydrostatic bearing device 50 may further include a cooling device (not shown), thereby maintaining a constant oil temperature and holding viscosity, and minimizing heat shock of the oil, thereby minimizing thermal displacement of the workpiece. Through this, it is possible to improve the processing precision of the workpiece processed through the machine tool.

이와 같이 유정압이 생성되는 상부방향으로 지지력이 발생하고 일정 간극에 오일의 유막이 형성됨으로 해서 마찰이 없는 상태로 오일에 회전테이블(40)이 부상하여 회전하게 된다. 따라서 회전테이블(40)은 샤프트(30)의 내측 위치에서 센터링 볼 베어링부(100)에 의해 지지되고, 샤프트(30)의 외측 위치에서는 축상 유정압 베어링 패드(200)에 의해 부상되어 회전하기 때문에 고중력 가공제품의 하중이 높은 부분인 가운데 부분을 볼 베어링으로 지지하고, 바깥쪽 부분을 마찰이 없는 상태에서 오로지 오일의 점성마찰의 영향만을 받은 채 회전을 하기 때문에 정밀가공을 할 수 있게 된다. As the bearing force is generated in the upper direction in which the oil pressure is generated and the oil film of the oil is formed at a predetermined gap, the rotary table 40 floats on the oil and rotates without friction. Therefore, the rotary table 40 is supported by the centering ball bearing part 100 at an inner position of the shaft 30, and is lifted and rotated by an axial hydrostatic bearing pad 200 at an outer position of the shaft 30. The center part, which is the high load part of high gravity processed products, is supported by ball bearings, and the outer part is rotated only under the influence of oil's viscous friction without friction.

이와 같이, 본 발명에 따르면 고중량 가공제품의 지지력이 향상되어 기존의 유정압 베어링 구조보다 진동 감쇄력이 크고, 소음이 적으며, 회전속도를 증가할 수 있게 된다.As described above, according to the present invention, the bearing capacity of the heavy-weight processed product is improved, and thus the vibration damping force is greater than the conventional hydrostatic bearing structure, the noise is low, and the rotation speed can be increased.

한편, 본 발명의 바람직한 다른 실시예에 따른 미세유량 분배 밸브가 설치된 고중량용 공작기계는 복수 개로 형성된 공급홀(210)은 압유를 공급하는 작동유체 공급밸브(300)가 각각 형성되어 있는 것이 특징이다. On the other hand, the heavy machine tool installed with a micro flow rate distribution valve according to another preferred embodiment of the present invention is characterized in that the plurality of supply holes 210 formed with a working fluid supply valve 300 for supplying pressure oil is formed, respectively. .

여기서 작동유체 공급밸브(300)는 압력보상형 유량조절밸브인 것이 더욱 바람직하다. 따라서 자유흐름이나 제어흐름시 유량의 흐름이 대체적으로 장애가 없고 직결형으로 이루어져 반응속도가 빠르고, 지연시간이 적으므로 오동작을 막을 수가 있다.The working fluid supply valve 300 is more preferably a pressure compensation flow rate control valve. Therefore, the flow rate of free flow or control flow is generally uninterrupted and is directly connected so that the reaction speed is fast and the delay time is small, thereby preventing malfunction.

상기와 같이 구성된 미세유량 분배 밸브가 설치된 고중량용 공작기계의 동작에 대하여 설명하자면, 유정압 베어링 장치(50)는 정상적으로 압력과 유량을 발생시켜 복수 개로 형성된 공급홀(210) 각각에 작동유체 공급밸브(300)를 통하여 압유를 각각 공급한다.Referring to the operation of the heavy-weight machine tool provided with the fine flow rate distribution valve configured as described above, the hydrostatic bearing device 50 generates a pressure and flow rate normally to operate the fluid supply valve in each of the plurality of supply holes 210 formed Pressure oil is supplied through 300, respectively.

또한, 종래 기술과 같이 3개 또는 4개의 작동유체 분배밸브(300)에서 각 4개의 분배라인을 통해 12개 내지 16개의 공급홀(210)에 작용유체를 공급하는 것이 아니라 12개 내지 16개의 공급홀(210)에 12개 내지 16개의 작동유체 분배밸브(300)가 설치되어 12개 내지 16개의 라인을 통하여 각각 공급하게 함으로써 회전시 하중압력이나 공급압력 등의 변수에 관계없이 일정한 비율로 유량을 제어하여 유량분할오차를 줄일 수 있어 내구성과 움직임이 원활하여 공작기계의 밸런스 등이 향상되어 정밀치수 공차를 달성할 수 있게 되는 것이다.In addition, instead of supplying the working fluid to the 12 to 16 supply holes 210 through each of the four distribution lines in the three or four working fluid distribution valves 300, as in the related art, 12 to 16 supplies are supplied. 12 to 16 working fluid distribution valves 300 are installed in the hole 210 to supply them through 12 to 16 lines, respectively, so that the flow rate is maintained at a constant rate regardless of variables such as load pressure and supply pressure during rotation. By controlling the flow rate, it can reduce the flow splitting error, so that the durability and movement are smooth, and the balance of the machine tool is improved, so that the precise dimension tolerance can be achieved.

이상과 같이, 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

10. 하우징 20. 기어
30. 샤프트 40. 회전테이블
50. 유정압 베어링 장치 100. 센터링 볼 베어링부
200. 축상 유압베어링 패드 210. 공급홀
300. 작동유체 공급밸브10. Housing 20. Gear
30. Shaft 40. Swivel Table
50. Hydrostatic bearing device 100. Centering ball bearing part
200. Axial hydraulic bearing pad 210. Supply hole
300. Working fluid supply valve

Claims (3)

하우징(10)과, 상기 하우징(10)의 내경부에 설치된 기어(20)와, 상기 기어(20)의 중심축에 삽입된 샤프트(30)와, 상기 샤프트(30)에 장착된 회전테이블(40)과, 상기 샤프트(30)를 회전가능하게 비접촉 지지하는 유정압 베어링 장치(50)가 포함된 공작기계에 있어서,
상기 하우징(10)의 상면의 샤프트(30)의 내측 위치에서 회전테이블(40)을 회전 가능하게 지지하는 센터링 볼 베어링부(100)가 설치되고
상기 하우징(10)의 상면의 샤프트(30)의 외측 위치에서 회전테이블(40)과 대향하는 축상(Axial) 유압베어링 패드(200)를 가지며, 상기 축상 유압베어링 패드(200)에 상기 회전테이블(40)과의 간극에 유정압으로 지지하기 위한 압유가 각각 공급되는 공급홀(210)이 복수 개 이상 형성되어 있으며,
상기 복수 개로 형성된 각각의 공급홀(210)은 압유를 공급하는 작동유체 공급밸브(300)가 각각 따로 형성되어 있는 것을 특징으로 하는 미세유량 분배 밸브가 설치된 고중량용 공작기계.A housing 10, a gear 20 provided in an inner diameter portion of the housing 10, a shaft 30 inserted into a central axis of the gear 20, and a rotary table mounted to the shaft 30 ( 40) and a hydrostatic bearing device (50) for rotatably and non-contactably supporting the shaft (30),
Centering ball bearing part 100 for rotatably supporting the rotary table 40 at the inner position of the shaft 30 of the upper surface of the housing 10 is installed
It has an axial hydraulic bearing pad 200 facing the rotary table 40 at the outer position of the shaft 30 on the upper surface of the housing 10, the rotary table (10) on the axial hydraulic bearing pad 200 At least a plurality of supply holes 210 for supplying pressurized oil for supporting oil pressure in the gap with 40 are formed.
Each of the plurality of supply holes 210 is provided with a hydraulic fluid supply valve 300 for supplying the pressurized oil is a heavy weight machine tool is installed, characterized in that the micro flow rate distribution valve is formed separately. 제 1 항에 있어서,
상기 작동유체 공급밸브(300)는 미세유량 분배 밸브인 것을 특징으로 하는 미세유량 분배 밸브가 설치된 고중량용 공작기계.The method of claim 1,
The working fluid supply valve 300 is a heavy weight machine tool with a fine flow rate distribution valve, characterized in that the fine flow rate distribution valve. 제 1 항에 있어서,
상기 작동유체 공급밸브(300)는 압력보상형 유량조절밸브인 것을 특징으로 하는 미세유량 분배 밸브가 설치된 고중량용 공작기계.

The method of claim 1,
The working fluid supply valve 300 is a heavy weight machine tool with a fine flow rate distribution valve, characterized in that the pressure compensation flow control valve.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112123199A (en) * 2020-08-27 2020-12-25 森合(天津)科技有限公司 Internal feedback precise closed static pressure rotary table
CN114183439A (en) * 2021-12-08 2022-03-15 徐州健川机械制造有限公司 Combined slewing bearing device
CN114393560A (en) * 2021-12-14 2022-04-26 四川航天计量测试研究所 Full-automatic aligning and leveling device based on air-floating rotary table and attitude adjusting method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112123199A (en) * 2020-08-27 2020-12-25 森合(天津)科技有限公司 Internal feedback precise closed static pressure rotary table
CN114183439A (en) * 2021-12-08 2022-03-15 徐州健川机械制造有限公司 Combined slewing bearing device
CN114393560A (en) * 2021-12-14 2022-04-26 四川航天计量测试研究所 Full-automatic aligning and leveling device based on air-floating rotary table and attitude adjusting method thereof

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