KR20130037938A - Device for providing coolant for a machine tool - Google Patents

Device for providing coolant for a machine tool Download PDF

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Publication number
KR20130037938A
KR20130037938A KR1020110102501A KR20110102501A KR20130037938A KR 20130037938 A KR20130037938 A KR 20130037938A KR 1020110102501 A KR1020110102501 A KR 1020110102501A KR 20110102501 A KR20110102501 A KR 20110102501A KR 20130037938 A KR20130037938 A KR 20130037938A
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South Korea
Prior art keywords
filter
pump
cutting oil
cutting
machine tool
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KR1020110102501A
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Korean (ko)
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조영전
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두산인프라코어 주식회사
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Priority to KR1020110102501A priority Critical patent/KR20130037938A/en
Publication of KR20130037938A publication Critical patent/KR20130037938A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • 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
    • B23Q11/0042—Devices for removing chips
    • B23Q11/005—Devices for removing chips by blowing
    • 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
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1084—Arrangements for cooling or lubricating tools or work specially adapted for being fitted to different kinds of machines
    • 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
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

PURPOSE: A device for providing cutting oil in a machine tool is provided to minimize fine cut chips flowing into a pump, thereby reducing the failure rate of the pump. CONSTITUTION: A device for providing cutting oil in a machine tool comprises an oil storage tank(10), a first filter(20), a second filter(40), a suction pump(30), and a circulation pump(50). The oil storage tank stores cutting oil which is supplied to and collected from the workspace of a machine tool. The first filter is installed inside the oil storage tank. The second filter filters cut chips from the cutting oil passing through the first filter. The suction pipe is installed between the first filter and the second filter. The circulation pump pumps the cutting oil from the second filter and supplies the oil to the workplace.

Description

공작기계의 절삭유 공급장치{ Device for providing coolant for a machine tool } Coolant supply for machine tools {Device for providing coolant for a machine tool}

본 발명은 공작기계의 절삭유 공급장치에 관한 것으로, 특히 공작기계의 주축이나 공구로 절삭유를 공급하고 이물질을 여과하여 순환시키는 공작기계의 절삭유 공급장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting oil supply device for a machine tool, and more particularly, to a cutting oil supply device for a machine tool for supplying cutting oil to a spindle or a tool of a machine tool and filtering and circulating foreign substances.

일반적으로, 공작기계에서는 절삭효과를 높이고 윤활 및 냉각을 하기 위해 주축이나 공구 및 공작물에 절삭유와 같은 액체를 공급하게 되는데, 이러한 절삭유는 회수되어 순환되면서 다시 사용된다. 회수되는 절삭유에는 절삭가공시 발생하는 칩이 함께 혼합되어 회수되는데 정화장치를 이용하여 절삭유와 칩을 분리한 후 절삭유를 다시 순환시키게 된다. In general, a machine tool supplies a liquid such as cutting oil to a spindle, a tool, and a workpiece in order to improve cutting effect, lubrication, and cooling, and the cutting oil is recovered and circulated and used again. The recovered coolant is mixed with the chips generated during the cutting process and recovered together. After separating the coolant and the chip using a purifier, the coolant is circulated again.

종래 절삭유 공급장치의 일예는 도 1과 도 2에 도시된 바와 같이, 절삭유 저유조(110)로부터 흡입관(125)을 통해 절삭유를 흡입하여 순환시키는 순환펌프(130), 상기 흡입관(125) 입구에 구비되어 칩을 1차로 여과하는 1차 필터(120), 상기 순환펌프(130)로부터 절삭유를 공급받아 1차 필터(120)를 통과한 칩을 2차로 여과하여 작업공간, 즉 주축(spindle)이나 공구로 공급하는 2차 필터(140)를 포함하고 있다. An example of a conventional cutting oil supply device is a circulation pump 130 for sucking and circulating cutting oil through a suction pipe 125 from a cutting oil storage tank 110, as shown in FIGS. 1 and 2, at an inlet of the suction pipe 125. It is provided with a primary filter 120 to filter the chips first, the coolant is supplied from the circulation pump 130 and passes through the primary filter 120 to filter the chips to the secondary work space, that is, the spindle (spindle) or A secondary filter 140 is supplied to the tool.

종래 순환펌프(130)로는 치형에 트로코이드 곡선을 사용한 기어 펌프(gear pump)인 트로코이드 펌프(trochoid pump)가 주로 사용되고 있는데, 트로코이드 펌프와 같은 기어 펌프를 사용하는 것은 다른 종류의 펌프에 비해 양수량의 변동이 적고 고압을 용이하게 얻을 수 있으며 점도가 높은 절삭유를 강제로 순환시키는데 적합하기 때문이다. As a conventional circulation pump 130, a trochoid pump, which is a gear pump using a trocoid curve in a tooth shape, is mainly used. The use of a gear pump, such as a trocoid pump, is more variable in pumping quantity than other types of pumps. This is because this low pressure can be easily obtained and is suitable for forcibly circulating cutting oil with high viscosity.

절삭유는 1차 필터(Suction filter)를 거쳐 순환펌프(130)로 유입되고 순환펌프(130)에서 2차 필터를 거쳐 주축과 공구로 공급된다. 그러나, 미세 절삭칩의 경우 1차 필터(120)에 의해 걸러 지지 않고 순환펌프(130)로 유입되어 순환펌프(130)의 고장원인이 되어 왔다. 즉, 기어 펌프와 같은 회전식 펌프는 유체에 운동량을 주는 원심펌프와는 달리 미세 절삭칩과 같은 고체입자가 혼합되어 있는 액체에 사용되는 경우 마모 등의 염려가 있고 미세 절삭칩에 의해 로터(rotor)가 쉽게 파손되는 문제점이 있었다. 이와 같이 로터가 파손되면 교체를 위해 작업이 중단되어야 하고, 더욱이 트로코이드 펌프는 고가의 장비로 이를 수리하거나 교체하는 데 비용이 많이 소요된다. The cutting oil flows into the circulation pump 130 through a primary filter and is supplied to the main shaft and the tool through the secondary filter from the circulation pump 130. However, the fine cutting chip has not been filtered by the primary filter 120 and has been introduced into the circulation pump 130 to cause a failure of the circulation pump 130. That is, a rotary pump such as a gear pump is unlike a centrifugal pump that imparts momentum to a fluid, and when used in a liquid in which solid particles such as fine cutting chips are mixed, there is a fear of wear and the like. There was a problem that is easily broken. If the rotor is damaged in this way, the work must be stopped for replacement, and the trocoid pump is expensive to repair or replace with expensive equipment.

한편, 상기 2차 필터(140)는 수십 ㎛ 이상의 미세 입자를 제거할 때에 사용되는 백 필터(bag filter)로, 섬유질의 자루로 형성된 여과포를 구비하고 있는데 이 여과포가 미세 절삭칩으로 인해 쉽게 막혀 절삭유의 흐름이 저해되고 주축이나 공구에 절삭유가 제대로 공급되지 않아 주축이나 공구가 파손되는 문제를 유발하고 있다. 나아가 여과포로부터 미세 절삭칩을 제거하기 위해서는 백 필터를 분해해야 하는 불편함이 있고 새로운 여과포로 교체하는 시기도 짧아지는 문제점이 있었다. On the other hand, the secondary filter 140 is a bag filter used to remove fine particles of several tens of micrometers or more, and includes a filter cloth formed of a fiber bag. The flow of water is hampered and the coolant is not properly supplied to the spindle or tool, causing the spindle or tool to break. Furthermore, in order to remove the fine cutting chip from the filter cloth, there is an inconvenience of disassembling the bag filter, and there is a problem that the time to replace the new filter cloth is shortened.

본 발명은 상기한 바와 같은 종래 공작기계의 절삭유 공급장치가 가지는 문제점들을 개선하기 위해 창출된 것으로, 미세 절삭칩이 펌프로 유입되는 것을 최소화하여 펌프의 고장율을 감소시킬 수 있는 공작기계의 절삭유 공급장치를 제공함에 그 목적이 있다. The present invention was created to improve the problems of the cutting oil supply device of the conventional machine tool as described above, the cutting oil supply device of the machine tool that can reduce the failure rate of the pump by minimizing the introduction of fine cutting chips into the pump The purpose is to provide.

또한, 본 발명은 필터에 축적된 미세 절삭칩을 간편하게 제거할 수 있는 공작기계의 절삭유 공급장치를 제공함에 다른 목적이 있다. Another object of the present invention is to provide a cutting oil supply device for a machine tool that can easily remove the fine cutting chips accumulated in the filter.

상기한 바와 같은 목적을 달성하기 위하여 본 발명에 의한 공작기계의 절삭유 공급장치는, 공작기계의 작업공간에 공급되는 절삭유가 저장되는 저유조와, 상기 저유조에 저장된 절삭유를 유입하여 절삭 칩을 여과하는 1차 필터, 상기 1차 필터를 통과한 절삭 칩을 여과하는 여과포를 구비한 2차 필터, 상기 1차 필터와 2차 필터 사이에 구비되고 상기 1차 필터로부터 절삭유를 펌핑하여 2차 필터로 공급하는 흡입펌프, 및 상기 2차 필터로부터 절삭유를 펌핑하여 작업공간으로 공급하는 순환펌프를 포함하는 것을 특징으로 한다. In order to achieve the above object, a cutting oil supply device for a machine tool according to the present invention includes a storage tank for storing cutting oil supplied to a work space of a machine tool and a cutting oil stored in the storage tank to filter cutting chips. A secondary filter having a primary filter, a filter cloth for filtering the cutting chips passing through the primary filter, and provided between the primary filter and the secondary filter and pumping cutting oil from the primary filter to supply the secondary filter It characterized in that it comprises a suction pump, and a circulation pump for pumping the cutting oil from the secondary filter to supply to the working space.

바람직하게는, 상기 2차 필터로 압축공기를 공급하여 여과포에 퇴적된 칩을 제거하는 공기분사기구를 더 포함한다. Preferably, the air filter may further include an air injection mechanism for supplying compressed air to the secondary filter to remove chips deposited on the filter cloth.

더욱 바람직하게는, 상기 흡입펌프는 임펠러의 회전에 의한 원심력을 이용하여 유체를 수송하는 원심 펌프이고, 상기 순환펌프는 기어를 맞물려 이와 이 사이의 공간으로 유체를 수송하는 기어 펌프이다. More preferably, the suction pump is a centrifugal pump for transporting fluid using centrifugal force by the rotation of the impeller, and the circulation pump is a gear pump for meshing gears and transporting fluid to the space therebetween.

이상에서 설명한 바와 같이 본 발명에 따른 공작기계의 절삭유 공급장치에 의하면, 미세 절삭칩이 펌프로 유입되는 것을 최소화하여 펌프의 고장율을 감소시킬 수 있고, 필터에 축적된 미세 절삭칩을 간편하게 제거하여 운전시간을 연장시킬 수 있을 뿐만 아니라 절삭유를 원활하게 공급하고 순환시켜 절삭장비의 고장율을 감소시킬 수 있는 효과가 있다. As described above, according to the cutting oil supply apparatus of the machine tool according to the present invention, the fine cutting chips are minimized from entering the pump, thereby reducing the failure rate of the pump, and easily removing the fine cutting chips accumulated in the filter to operate. In addition to extending the time, it is possible to smoothly supply and circulate the coolant to reduce the failure rate of the cutting equipment.

도 1은 종래의 기술에 따른 공작기계의 절삭유 공급장치의 일예를 나타낸 사시도,
도 2는 도 1에 도시된 공작기계의 절삭유 공급장치의 작동상태를 나타낸 구성도,
도 3과 도 4는 본 발명의 일실시예에 따른 공작기계의 절삭유 공급장치를 나타낸 사시도,
도 5는 도 3에 도시된 2차 필터의 내부 단면도,
도 6은 도 3에 도시된 공작기계의 절삭유 공급장치의 작동상태를 나타낸 구성도,
도 7은 통상의 원심펌프의 작동원리를 나타낸 개념도이다.1 is a perspective view showing an example of a cutting oil supply device of a machine tool according to the prior art,
2 is a configuration diagram showing an operating state of the cutting oil supply device of the machine tool shown in FIG.
3 and 4 are a perspective view showing a cutting oil supply device of a machine tool according to an embodiment of the present invention,
5 is an internal cross-sectional view of the secondary filter shown in FIG.
6 is a configuration diagram showing an operating state of the cutting oil supply device of the machine tool shown in FIG.
7 is a conceptual diagram showing the operation principle of a conventional centrifugal pump.

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

도 3 내지 도 6을 참조하면, 본 발명의 일실시예에 따른 공작기계의 절삭유 공급장치는, 공작기계의 작업공간에 공급되는 절삭유가 저장되는 저유조(10)와, 상기 저유조(10)에 저장된 절삭유를 유입하여 절삭 칩을 여과하는 1차 필터(20), 상기 1차 필터(20)를 통과한 절삭 칩을 여과하는 여과포(41)를 구비한 2차 필터(40), 상기 1차 필터(20)와 2차 필터(40) 사이에 구비되고 상기 1차 필터(20)로부터 절삭유를 펌핑하여 2차 필터(40)로 공급하는 흡입펌프(30), 및 상기 2차 필터(40)로부터 절삭유를 펌핑하여 작업공간으로 공급하는 순환펌프(50), 상기 2차 필터(40)로 압축공기를 공급하여 여과포(41)에 퇴적된 칩을 제거하는 공기분사기구(60)로 구성된다. 3 to 6, a cutting oil supply apparatus of a machine tool according to an embodiment of the present invention includes a storage tank 10 storing cutting oil supplied to a work space of a machine tool, and the storage tank 10. A secondary filter 40 having a primary filter 20 for introducing cutting oil stored therein to filter cutting chips, a filter cloth 41 for filtering cutting chips passing through the primary filter 20, and the primary filter A suction pump 30 provided between the filter 20 and the secondary filter 40 and pumping cutting oil from the primary filter 20 to the secondary filter 40, and the secondary filter 40. It is composed of a circulation pump 50 for pumping the cutting oil from the supply space to the working space, the air injection mechanism 60 for supplying compressed air to the secondary filter 40 to remove the chips deposited on the filter cloth (41).

상기 저유조(10)는 공작기계의 작업공간에 공급되는 절삭유가 저장되는 탱크로, 작업공간으로부터 절삭유가 회수되어 저장된다. 이때 회수되는 절삭유는 거름망(도면 미도시)에 의해 비교적 큰 절삭 칩과 이물질이 걸러진 후 저유조(10)로 저장된다. The oil storage tank 10 is a tank in which cutting oil supplied to a work space of a machine tool is stored, and the cutting oil is recovered and stored from the work space. At this time, the recovered cutting oil is stored in the oil storage tank 10 after the relatively large cutting chips and foreign matters are filtered by the strainer (not shown).

상기 1차 필터(20)는 상기 저유조(10)의 내부에 구비되어 저유조(10)에 저장된 절삭유를 1차로 여과하게 된다. 상기 1차 필터(20)에는 제1순환호스(25)가 연결되어 흡입펌프(30)로 1차로 여과된 절삭유가 공급된다. The primary filter 20 is provided in the storage tank 10 to filter the cutting oil stored in the storage tank 10 first. The first circulating hose 25 is connected to the primary filter 20 to supply cutting oil filtered primarily to the suction pump 30.

상기 흡입펌프(30)는 상기 1차 필터(20)로부터 2차 필터(40)로 연결되는 유로 상에 구비되어 상기 저유조(10)의 절삭유가 1차 필터(20)를 통과하여 2차 필터(40)로 공급되도록 펌핑한다. 상기 흡입펌프(30)는 상기 1차 필터(20)와 제1순환호스(25)로 연결되고, 제2순환호스(35)를 통해 2차 필터(40)로 절삭유를 공급한다. The suction pump 30 is provided on a flow path connected from the primary filter 20 to the secondary filter 40 so that the cutting oil of the oil storage tank 10 passes through the primary filter 20 to filter the secondary filter. Pump to be supplied to (40). The suction pump 30 is connected to the primary filter 20 and the first circulation hose 25, and supplies cutting oil to the secondary filter 40 through the second circulation hose 35.

상기 흡입펌프(30)는 임펠러의 회전에 의한 원심력을 이용하여 유체를 수송하는 원심 펌프(centrifugal pump)로서, 도 7에 도시된 바와 같이 기어 펌프와는 달리 임펠러와 유로 내측벽과의 사이에 유체가 이동하는 공간이 확보되어 절삭칩이 임펠러를 파손시키지 않는다. 즉, 기어 펌프는 기어의 이와 이가 맞물려 회전하게 되므로 절삭칩이 통과하면서 기어의 이 사이에 끼어 기어를 손상시키게 되는 반면, 원심펌프는 임펠러가 다른 물체와 접촉되지 않고 공회전하게 되므로 절삭유에 포함된 절삭칩이 임펠러를 스쳐 지나갈 뿐 기어 펌프와 같은 끼임 현상이 없어 임펠러가 손상되지는 않게 되며 그로 인해 기어 펌프에 비해 장시간 절삭유를 운반할 수 있게 된다. 여기서, 원심펌프는 기어 펌프에 비해 수송 압력이 낮아 절삭유를 순환시키기에는 한계가 있으므로 순환펌프(50)를 추가로 구비하되 상기 1차 필터(20)를 통과한 절삭유에는 2차 필터(40)를 통과한 절삭유에 비해 큰 입자의 절삭칩이 포함되어 있으므로 2차 필터(40)를 통과한 절삭유를 흡입하도록 순환펌프(50)를 구비하고 있다. The suction pump 30 is a centrifugal pump for transporting fluid using centrifugal force by rotation of the impeller, and unlike the gear pump as shown in FIG. 7, the fluid between the impeller and the flow path inner wall is shown in FIG. 7. The space to move is secured so that the cutting chips do not break the impeller. In other words, the gear pump rotates with the teeth of the gear, so that the cutting chip passes through it and damages the gear while the centrifugal pump is idle because the impeller does not come into contact with other objects. The chip passes through the impeller and there is no jamming like the gear pump, which does not damage the impeller, which allows for longer transport of coolant than the gear pump. Here, since the centrifugal pump has a lower transport pressure than the gear pump, there is a limit to circulating the cutting oil. Thus, the centrifugal pump further includes a circulating pump 50, and the secondary filter 40 is attached to the cutting oil passing through the primary filter 20. Since a cutting chip having a larger particle size is included than the cutting oil that has passed, the circulation pump 50 is provided to suck the cutting oil that has passed through the secondary filter 40.

상기 2차 필터(40)는 1차 필터(20)에서 여과되지 않은 절삭칩을 2차로 여과하는 장치로, 도 5에 도시된 바와 같이 미세한 절삭칩을 여과하기 위한 여과포(41)를 구비하고 있다. 상기 여과포(41)의 일측에는 미세한 절삭칩이 퇴적되어 절삭유의 투과율을 저하시키게 되므로 공기분사기구(60)를 구비하여 퇴적된 절삭칩을 제거하게 된다. The secondary filter 40 is a device for secondly filtering the cutting chips that are not filtered by the primary filter 20, and includes a filter cloth 41 for filtering the fine cutting chips as illustrated in FIG. 5. . One side of the filter cloth 41 is fine cutting chips are deposited to reduce the transmittance of the cutting oil, so that the air chips are provided with an air injection mechanism 60 to remove the stacked chips.

상기 공기분사기구(60)는 공기펌프(도면 미도시)를 구비하고 공기공급호스(65)를 통해 여과포(41)의 일측으로 고압의 공기를 분사하여 퇴적된 절삭칩을 불어 내게 된다. 상기 공기펌프는 작업자가 수동으로 동작시키는 것도 가능하고 작업공간으로 공급되는 절삭유의 압력에 의해 작동이 개폐되도록 하는 것도 가능하다. 즉, 상기 2차 필터(40)를 통과한 절삭유의 압력을 후술하는 제4순환호스(55)상에서 측정하여 압력이 일정치 이하로 내려가면 공기펌프를 작동시켜 여과포(41)로 분사함으로써 절착칩을 불어 내도록 하는 것도 가능하다. The air injection mechanism 60 is provided with an air pump (not shown) and blows high-pressure air toward one side of the filter cloth 41 through the air supply hose 65 to blow out the accumulated cutting chips. The air pump may be operated manually by the operator or may be opened and closed by the pressure of the cutting oil supplied to the working space. That is, the pressure of the cutting oil passing through the secondary filter 40 is measured on the fourth circulation hose 55, which will be described later, and when the pressure drops below a predetermined value, the air pump is operated to spray the filter cloth 41 to blow the cutting chip. It is also possible to blow out.

상기 공기분사기구(60)를 수차례 반복하여 작동하더라도 절삭유의 순환이 원활하지 않은 경우에는 여과포(41)를 분리하여 세척하거나 교체하게 된다. Even if the air injection mechanism 60 is operated repeatedly several times, when the circulation of cutting oil is not smooth, the filter cloth 41 is separated and washed or replaced.

상기 순환펌프(50)는 상기 2차 필터(40)의 일측에 제3순환호스(45)로 연결되어 여과포(41)를 통과한 절삭유를 펌핑하고 제4순환호스(55)를 통해 주축이나 공구 등이 있는 작업공간으로 공급하게 된다. The circulation pump 50 is connected to one side of the secondary filter 40 by a third circulation hose 45 to pump the cutting oil that has passed through the filter cloth 41 and through the fourth circulation hose 55 to the main shaft or the tool. It will be supplied to a workspace with a back.

상기 순환펌프(50)는 기어를 맞물려 이와 이 사이의 공간으로 유체를 수송하는 기어 펌프(gear pump)로서, 원심펌프인 흡입펌프(30)에 비해 고압으로 유체를 운반할 수 있으므로 고압의 절삭유를 작업공간으로 신속하게 공급할 수 있게 된다. 여기서, 상기 순환펌프(50)는 2차 필터(40)를 통과하여 절삭칩이 대부분 여과된 절삭유를 펌핑하게 되므로 기어펌프임에도 불구하고 절삭칩에 의해 기어가 파손되는 현상을 최소화시킬 수 있게 되고 그로 인해 수명이 크게 연장될 수 있게 된다. The circulation pump 50 is a gear pump that meshes gears and transports the fluid to the space therebetween, and is capable of transporting the fluid at a higher pressure than the suction pump 30, which is a centrifugal pump. It can be supplied quickly to the workspace. Here, the circulation pump 50 passes through the secondary filter 40, so that the cutting chip is pumped through the filtered oil, which is mostly filtered, thereby minimizing the breakage of the gear by the cutting chip. As a result, the life can be greatly extended.

한편, 펌프에는 크게 터보형 펌프와 용적형 펌프가 있고 터보형 펌프에는 원심 펌프와 축류 펌프 등이 있으며 용적형 펌프에는 왕복 펌프(reciprocating pump)와 회전 펌프(rotary pump) 등이 있다. 용적형 펌프는 터보형 펌프에 비해 고압이 발생되며 효율이 높고 압력이 달라져도 토출량이 변하지 않는 장점이 있는데, 특히 회전 펌프는 양수량의 변동이 적고 고압을 용이하게 얻을 수 있으며, 점도가 높은 오일을 수송하는데 적합하다. 회전 펌프에는 베인 펌프(vane pump), 기어 펌프(gear pump), 스크류 펌프(screw pump) 등이 있다. 상기 흡입펌프(30)는 원심 펌프 이외에 축류 펌프로 대체될 수 있고, 원심펌프 중에서는 침수형과 자흡식 펌프(self-priming pump) 모두 사용가능하다. 상기 순환펌프(50)는 회전 펌프로 대체될 수 있다. On the other hand, the pump mainly includes a turbo pump and a volumetric pump, the turbo pump includes a centrifugal pump and an axial pump, and the volumetric pump includes a reciprocating pump and a rotary pump. Volumetric pumps have the advantage of higher pressure than turbo pumps, high efficiency and unchanged discharge volume even with different pressures. In particular, rotary pumps have low fluctuations in pumping quantity, can easily obtain high pressure, and transport high viscosity oil. Suitable. Rotary pumps include vane pumps, gear pumps, screw pumps, and the like. The suction pump 30 may be replaced by an axial pump in addition to the centrifugal pump, and among the centrifugal pumps, both a submersible pump and a self-priming pump may be used. The circulation pump 50 may be replaced by a rotary pump.

도 6을 참조하여 절삭유의 순환과정을 설명하면, 상기 저유조(10)에 저장된 절삭유는 흡입펌프(30)의 동작에 의해 1차 필터(20)를 통과하면서 1차로 절삭칩이 여과되고, 흡입펌프(30)를 통과한 절삭유는 상기 2차 필터(40)로 공급되며 상기 순환펌프(50)의 동작에 의해 절삭유가 2차 필터(40)를 통과하면서 미세한 절삭칩이 2차로 여과된 후 순환펌프(50)를 통과하여 주축이나 공구 등으로 공급된다. Referring to FIG. 6, the cutting oil is circulated through the primary filter 20 by the operation of the suction pump 30. The cutting oil passing through the pump 30 is supplied to the secondary filter 40, and the cutting oil passes through the secondary filter 40 by the operation of the circulation pump 50, and fine cutting chips are secondly filtered and then circulated. It passes through the pump 50 and is supplied to a main shaft, a tool, or the like.

10 : 저유조 20 : 1차 필터
25 : 제1순환호스 30 : 흡입펌프
35 : 제2순환호스 40 : 2차 필터
41 : 여과포 45 : 제3순환호스
50 : 순환펌프 55 : 제4순환호스
60 : 공기분사기구 65 : 공기공급호스 10: oil tank 20: primary filter
25: first circulation hose 30: suction pump
35: 2nd circulation hose 40: 2nd filter
41: filter cloth 45: third circulation hose
50: circulation pump 55: fourth circulation hose
60: air injection mechanism 65: air supply hose

Claims (3)

공작기계의 작업공간으로 공급되고 회수되는 절삭유가 저장되는 저유조(10);
상기 저유조(10)의 내부에 구비되고, 상기 저유조(10)에 저장된 절삭유를 유입하여 절삭 칩을 여과하는 1차 필터(20);
상기 1차 필터(20)를 통과한 절삭유로부터 절삭 칩을 여과하는 여과포(41)를 구비한 2차 필터(40);
상기 1차 필터(20)와 2차 필터(40) 사이에 구비되고, 상기 1차 필터(20)로부터 절삭유를 펌핑하여 2차 필터(40)로 공급하는 흡입펌프(30); 및
상기 2차 필터(40)로부터 절삭유를 펌핑하여 작업공간으로 공급하는 순환펌프(50);를 포함하는 공작기계의 절삭유 공급장치.A storage tank 10 for storing cutting oil supplied to and recovered from a work space of the machine tool;
A primary filter 20 provided inside the storage tank 10 and filtering cutting chips by introducing cutting oil stored in the storage tank 10;
A secondary filter 40 having a filter cloth 41 for filtering the cutting chip from the cutting oil passing through the primary filter 20;
A suction pump 30 provided between the primary filter 20 and the secondary filter 40 to pump cutting oil from the primary filter 20 to the secondary filter 40; And
And a circulating pump (50) for supplying the cutting oil from the secondary filter (40) to the work space. 제1항에 있어서,
상기 2차 필터(40)의 여과포(41)로 압축공기를 공급하여 그 여과포(41)에 퇴적된 칩을 제거하는 공기분사기구(60);를 더 포함하는 것을 특징으로 하는 공작기계의 절삭유 공급장치.The method of claim 1,
Air injection mechanism 60 for supplying compressed air to the filter cloth 41 of the secondary filter 40 to remove the chips deposited on the filter cloth 41; supplying the cutting oil of the machine tool Device. 제1항에 있어서,
상기 흡입펌프(30)는 임펠러의 회전에 의한 원심력을 이용하여 유체를 수송하는 원심 펌프(centrifugal pump)이고, 상기 순환펌프(50)는 기어를 맞물려 이와 이 사이의 공간으로 유체를 수송하는 기어 펌프(gear pump)인 것을 특징으로 하는 공작기계의 절삭유 공급장치. The method of claim 1,
The suction pump 30 is a centrifugal pump for transporting fluid using centrifugal force by the rotation of the impeller, and the circulation pump 50 is a gear pump for transporting fluid to a space therebetween by engaging a gear. Coolant supply device for a machine tool, characterized in that the (gear pump).
KR1020110102501A 2011-10-07 2011-10-07 Device for providing coolant for a machine tool KR20130037938A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108890373A (en) * 2018-07-17 2018-11-27 嘉善县飞虹钮扣厂 A kind of hardware button perforating device
CN116276296A (en) * 2023-05-17 2023-06-23 新乡职业技术学院 Cutting fluid circulation control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108890373A (en) * 2018-07-17 2018-11-27 嘉善县飞虹钮扣厂 A kind of hardware button perforating device
CN116276296A (en) * 2023-05-17 2023-06-23 新乡职业技术学院 Cutting fluid circulation control device

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