KR102546551B1 - Cutting oil coolant device - Google Patents

Cutting oil coolant device Download PDF

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KR102546551B1
KR102546551B1 KR1020210041873A KR20210041873A KR102546551B1 KR 102546551 B1 KR102546551 B1 KR 102546551B1 KR 1020210041873 A KR1020210041873 A KR 1020210041873A KR 20210041873 A KR20210041873 A KR 20210041873A KR 102546551 B1 KR102546551 B1 KR 102546551B1
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South Korea
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cutting oil
clean
dirty
tank
cyclone filter
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KR1020210041873A
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Korean (ko)
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KR20220135766A (en
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심영희
여동근
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심영희
주식회사 더원텍
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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
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1069—Filtration systems specially adapted for cutting liquids
    • 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
    • B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
    • B23Q11/122—Lubricant supply devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/002—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external filters
    • 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)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

본 발명은 절삭유 쿨런트 장치에 관한 것으로, 공작기계에서 배출되며, 슬러지가 포함된 더티 절삭유가 저장되는 더티탱크와, 더티탱크로부터 더티 절삭유를 수령하여 슬러지를 분리하여 클린 절삭유를 배출하는 사이클론 필터와, 더티탱크와 사이클론 필터를 연결하는 더티 절삭유 공급관과, 더티 절삭유 공급관을 통해 사이클론 필터로 더티 절삭유를 공급 하는 공급펌프와, 사이클론 필터로부터 클린 절삭유를 수령하여 저장하는 클린탱크와, 클린탱크에 저장된 클린 절삭유를 공작기계로 공급하는 고압펌프와, 클린탱크와 고압펌프를 연결하는 클린 절삭유 공급관과, 고압펌프와 공작기계를 연결하는 클린 절삭유 배출관 및, 클린 절삭유 배출관의 일부영역에서 분기되어 더티 절삭유 공급관과 연결되며, 사이클론 필터의 초기 구동시 클린 절삭유를 공급하는 바이패스관을 포함한다.The present invention relates to a cutting oil coolant device, comprising: a dirty tank for storing dirty cutting oil discharged from a machine tool and containing sludge; a cyclone filter for receiving dirty cutting oil from the dirty tank and separating the sludge to discharge clean cutting oil; and , A dirty cutting oil supply pipe connecting the dirty tank and the cyclone filter, a supply pump supplying dirty cutting oil to the cyclone filter through the dirty cutting oil supply pipe, a clean tank receiving and storing clean cutting oil from the cyclone filter, and a clean tank stored in the clean tank. The high-pressure pump that supplies cutting oil to the machine tool, the clean cutting oil supply pipe connecting the clean tank and the high-pressure pump, the clean cutting oil discharge pipe connecting the high-pressure pump and the machine tool, and the dirty cutting oil supply pipe branched from some areas of the clean cutting oil discharge pipe connected, and includes a bypass pipe supplying clean cutting oil when the cyclone filter is initially driven.

Description

절삭유 쿨런트 장치{Cutting oil coolant device}Cutting oil coolant device {Cutting oil coolant device}

본 발명은 절삭유 쿨런트 장치에 관한 것이다.The present invention relates to a cutting oil coolant device.

공작기계의 금속 가공시 금속칩을 함유한 절삭유가 배출되게 되며, 이를 수집하여 금속칩, 슬러지와 같은 이물질을 절삭유로부터 분리한 후 여과된 절삭유를 공작기계에 고압으로 재공급하기 위해 쿨런트 장치가 사용되게 된다.During metal processing of machine tools, cutting oil containing metal chips is discharged. After collecting and separating foreign substances such as metal chips and sludge from the cutting oil, a coolant device is used to resupply the filtered cutting oil to the machine tool at high pressure. will be used

종래의 쿨런트 장치는 사이클론 필터를 통해 절삭유로부터 이물질을 분리한 후 공작기계로 재공급하는 구조를 갖는다.A conventional coolant device has a structure in which foreign substances are separated from cutting oil through a cyclone filter and then re-supplied to the machine tool.

그러나, 종래 쿨런트 장치는 사이클론 필터의 가동초기에는 원심력이 충분히 확보되지 않기 때문에 사이클론 필터의 여과 효율이 충분하지 않다. 이에 따라 이물질이 포함된 절삭유가 공작기계로 재공급되어 가공품질을 저하시킨다. 또한, 공작기계로 절삭유를 공급하는 고압펌프를 손상시켜 수명을 단축시키는 문제점이 있다. However, in the conventional coolant device, the filtration efficiency of the cyclone filter is not sufficient because the centrifugal force is not sufficiently secured at the initial stage of operation of the cyclone filter. As a result, the cutting oil containing the foreign matter is re-supplied to the machine tool, thereby deteriorating the processing quality. In addition, there is a problem that damages the high-pressure pump supplying cutting oil to the machine tool and shortens its life.

따라서, 본 발명의 목적은 사이클론 필터의 여과효율을 향상시켜 공작기계의 수명을 향상시키고, 공작기계에 의해 가공되는 가공품의 가공품질을 향상시킬 수 있는 절삭유 쿨런트 장치를 제공하는 것을 목적으로 한다.Accordingly, an object of the present invention is to provide a cutting oil coolant device capable of improving the lifespan of a machine tool by improving the filtration efficiency of a cyclone filter and improving the quality of workpieces processed by the machine tool.

본 발명은 절삭유 쿨런트 장치에 관한 것으로, 공작기계에서 배출되며, 슬러지가 포함된 더티 절삭유가 저장되는 더티탱크와, 상기 더티탱크로부터 상기 더티 절삭유를 수령하여 슬러지를 분리하여 클린 절삭유를 배출하는 사이클론 필터와, 상기 더티탱크와 상기 사이클론 필터를 연결하는 더티 절삭유 공급관과, 상기 더티 절삭유 공급관을 통해 상기 사이클론 필터로 상기 더티 절삭유를 공급 하는 공급펌프와, 상기 사이클론 필터로부터 상기 클린 절삭유를 수령하여 저장하는 클린탱크와, 상기 클린탱크에 저장된 클린 절삭유를 상기 공작기계로 공급하는 고압펌프와, 상기 클린탱크와 상기 고압펌프를 연결하는 클린 절삭유 공급관과, 상기 고압펌프와 상기 공작기계를 연결하는 클린 절삭유 배출관 및, 상기 클린 절삭유 배출관의 일부영역에서 분기되어 상기 더티 절삭유 공급관과 연결되며, 상기 사이클론 필터의 초기 구동시 클린 절삭유를 공급하는 바이패스관을 포함한다.The present invention relates to a cutting oil coolant device, which includes a dirty tank for storing dirty cutting oil discharged from a machine tool and containing sludge, and a cyclone receiving the dirty cutting oil from the dirty tank to separate the sludge and discharging clean cutting oil. A filter, a dirty cutting oil supply pipe connecting the dirty tank and the cyclone filter, a supply pump supplying the dirty cutting oil to the cyclone filter through the dirty cutting oil supply pipe, and receiving and storing the clean cutting oil from the cyclone filter A clean tank, a high-pressure pump supplying the clean cutting oil stored in the clean tank to the machine tool, a clean cutting oil supply pipe connecting the clean tank and the high-pressure pump, and a clean cutting oil discharge pipe connecting the high-pressure pump and the machine tool. and a bypass pipe branched from a part of the clean cutting oil discharge pipe and connected to the dirty cutting oil supply pipe, and supplying clean cutting oil when the cyclone filter is initially driven.

여기서, 상기 클린탱크는 유수분리부를 더 포함하는 것이 바람직하다. 이에 의해 클린탱크에 저장되는 클린 절삭유에 오일이 포함되는 것을 방지할 수 있다. Here, it is preferable that the clean tank further includes an oil-water separator. Accordingly, it is possible to prevent oil from being included in the clean cutting oil stored in the clean tank.

상기 사이클론 필터의 하부에는 사이클론 필터로부터 분리되어 배출되는 슬러지를 포집 및 배출할 수 있도록 슬러지 포집 백필터가 설치되는 것이 바람직하다.It is preferable that a sludge collecting bag filter is installed below the cyclone filter to collect and discharge the sludge separated and discharged from the cyclone filter.

상기 바이패스관에 설치되어 절삭유가 상기 더티 절삭유 공급관으로 공급 또는 차단되게 하는 개폐밸브와, 상기 고압펌프의 동작시 상기 개폐밸브가 개방되도록 하고, 상기 고압펌프의 동작이 미리 설정된 시간이 도래하면 상기 개폐밸브가 폐쇄되도록 제어하는 제어부를 더 포함하는 것이 바람직하다. An opening/closing valve installed in the bypass pipe to supply or block cutting oil to the dirty cutting oil supply pipe, and to open the opening/closing valve when the high-pressure pump operates, and when the operation of the high-pressure pump reaches a preset time, the It is preferable to further include a control unit for controlling the on-off valve to be closed.

전술한 구성을 갖는 본 발명에 따르면, 사이클론 필터의 여과효율을 향상시켜 공작기계의 수명을 향상시키고, 공작기계에 의해 가공되는 가공품의 가공품질을 향상시킨다.According to the present invention having the above configuration, the lifespan of the machine tool is improved by improving the filtration efficiency of the cyclone filter, and the quality of processed products processed by the machine tool is improved.

도 1은 본 발명의 실시예에 따른 절삭유 쿨런트 장치를 개략적으로 도시하는 구성도이다.1 is a configuration diagram schematically showing a cutting oil coolant device according to an embodiment of the present invention.

이하, 첨부도면을 참조하여 본 발명의 실시예에 따른 절삭유 쿨런트 장치를 구체적으로 설명한다.Hereinafter, a cutting oil coolant device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1을 참조하면, 실시예에 따른 절삭유 쿨런트 장치(100)는 더티탱크(110), 사이클론 필터(120), 더티 절삭유 공급관(130), 공급펌프(140), 클린탱크(150), 클린 절삭유 공급관(160), 고압펌프(170), 클린 절삭유 배출관(180), 바이패스관(190)으로 이루어진다.Referring to FIG. 1 , the cutting oil coolant device 100 according to the embodiment includes a dirty tank 110, a cyclone filter 120, a dirty cutting oil supply pipe 130, a supply pump 140, a clean tank 150, a clean It consists of a cutting oil supply pipe 160, a high pressure pump 170, a clean cutting oil discharge pipe 180, and a bypass pipe 190.

더티탱크(110)는 공작기계(10)에서 배출되는 슬러지가 포함됨 더티 절삭유를 저장한다.The dirty tank 110 stores dirty cutting oil including sludge discharged from the machine tool 10 .

또한, 더티탱크(110)의 일측에는 더티탱크(110)와 연통되는 필터링 탱크(112)가 더 포함할 수 있으며, 더티탱크(110)와 필터링 탱크(112)의 연결부(114)에는 메쉬필터(116)가 설치된다.In addition, a filtering tank 112 communicating with the dirty tank 110 may be further included at one side of the dirty tank 110, and a mesh filter ( 116) is installed.

메쉬필터(116)는 더티탱크(110)에 저장된 더티 절삭유에 포함된 슬러지 중 입자가 비교적 큰 슬러지를 제거한다.The mesh filter 116 removes sludge having relatively large particles among the sludge included in the dirty cutting oil stored in the dirty tank 110 .

사이클론 필터(120)는 더티탱크(110)로부터 더티 절삭유를 수령하여 더티 절삭유에 포함된 슬러지를 원심 분리하여 클린 절삭유를 배출한다. 사이클론 필터(120)에서 원심 분리된 슬러지는 사이클론 필터(120)의 하측으로 배출된다. The cyclone filter 120 receives dirty cutting oil from the dirty tank 110 and centrifugates the sludge included in the dirty cutting oil to discharge clean cutting oil. The sludge centrifuged in the cyclone filter 120 is discharged to the lower side of the cyclone filter 120.

사이클론 필터(120)의 하부에는 배출되는 슬러지를 포집하는 슬러지 포집 백필터(122)가 교체 가능하게 설치된다.At the bottom of the cyclone filter 120, a sludge collection bag filter 122 for collecting discharged sludge is installed to be replaceable.

더티 절삭유 공급관(130)은 더티탱크(110)와 사이클론 필터(120)를 연결하여 더티탱크(110)에 저장된 더티 절삭유가 사이클론 필터(120)로 공급되게 한다.The dirty cutting oil supply pipe 130 connects the dirty tank 110 and the cyclone filter 120 so that the dirty cutting oil stored in the dirty tank 110 is supplied to the cyclone filter 120 .

공급펌프(140)는 더티탱크(110)에 저장된 더티 절삭유가 더티 절삭유 공급관(130)을 통해 사이클론 필터(120)로 공급되게 한다.The supply pump 140 supplies the dirty cutting oil stored in the dirty tank 110 to the cyclone filter 120 through the dirty cutting oil supply pipe 130 .

클린탱크(150)는 사이클론 필터(120)로부터 클린 절삭유를 수령하여 저장한다. 또한, 클린탱크(150)는 클린 절삭유에 포함된 오일을 분리하기 위한 유수분리부(152)를 더 포함한다.The clean tank 150 receives and stores clean cutting oil from the cyclone filter 120 . In addition, the clean tank 150 further includes an oil/water separator 152 for separating oil included in the clean cutting oil.

클린 절삭유 공급관(160)은 클린탱크(150)와 고압펌프(170)를 연결한다.The clean cutting oil supply pipe 160 connects the clean tank 150 and the high pressure pump 170.

고압펌프(170)는 클린 절삭유가 클린 절삭유 공급관(160)을 통해 공작기계(10)로 공급되게 한다.The high-pressure pump 170 supplies clean cutting oil to the machine tool 10 through the clean cutting oil supply pipe 160 .

클린 절삭유 배출관(180)은 고압펌프(170)와 공작기계(10)를 연결하여 클린 절삭유가 고압펌프(170)를 통해 공작기계(10)로 공급되게 한다.The clean cutting oil discharge pipe 180 connects the high pressure pump 170 and the machine tool 10 so that the clean cutting oil is supplied to the machine tool 10 through the high pressure pump 170 .

바이패스관(190)은 클린 절삭유 배출관(180)의 일부영역에서 분기되어 더티 절삭유 공급관(130)과 연결되어 사이클론 필터(120)의 초기 구동시 클린 절삭유 배출관(180)에 저장되어 있는 클린 절삭유가 사이클론 필터(120)로 공급되게 한다.The bypass pipe 190 is branched from a part of the clean cutting oil discharge pipe 180 and is connected to the dirty cutting oil supply pipe 130 so that the clean cutting oil stored in the clean cutting oil discharge pipe 180 is discharged during the initial operation of the cyclone filter 120. to be supplied to the cyclone filter 120.

상술한 바와 같이 사이클론 필터(120)의 원심력이 충분하지 않은 초기 구동시에 바이패스관(190)을 통해 클린 절삭유가 사이클론 필터(120)로 공급되도록 하여 사이클론 필터(120)의 원심력이 충분히 확보할 수 있다. 이에 따라 사이클론 필터(120)의 여과 효율이 향상된다.As described above, when the centrifugal force of the cyclone filter 120 is insufficient, the clean cutting oil is supplied to the cyclone filter 120 through the bypass pipe 190, so that the centrifugal force of the cyclone filter 120 can be sufficiently secured. there is. Accordingly, the filtration efficiency of the cyclone filter 120 is improved.

바이패스관(190)에는 클린 절삭유가 더티 절삭유 공급관(130)으로 공급 또는 차단되게 하는 개폐밸브(192)가 설치된다.An on/off valve 192 is installed in the bypass pipe 190 to supply or shut off clean cutting oil to the dirty cutting oil supply pipe 130 .

그리고, 실시예에 따른 절삭유 쿨런트 장치(100)는 제어부(미도시)를 더 포함한다. 제어부는 고압펌프(170)의 동작시 개폐밸브(192)가 개방되도록 하고, 고압펌프(170)의 동작이 미리 설정된 시간이 도래하면 개폐밸브(192)가 폐쇄되도록 제어한다.And, the cutting oil coolant device 100 according to the embodiment further includes a control unit (not shown). The controller controls the opening/closing valve 192 to open when the high pressure pump 170 operates, and closes the opening/closing valve 192 when the operation of the high pressure pump 170 reaches a preset time.

이상 본 발명의 실시예를 첨부도면을 참조하여 설명하였지만, 당해 기술분야에 숙련된 사람은 하기의 청구범위에 기재된 본 발명의 기술적 사사으로부터 벗어나지 않은 범위 내에서 본 발명을 다양하게 수정 및 변경할 수 있음을 이해할 수 있을 것이다.Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art can variously modify and change the present invention without departing from the technical scope of the present invention described in the claims below. will be able to understand

110; 더티탱크
112; 필터링 탱크
114; 메쉬필터
120; 사이클론 필터
122; 슬러지 포집 백필터
130; 더티 절삭유 공급관
140; 공급펌프
150; 클린탱크
152; 유수분리부
160; 클린 절삭유 공급관
170; 고압펌프
180; 클린 절삭유 배출관
190; 바이패스관
192; 개폐밸브110; dirty tank
112; filtering tank
114; mesh filter
120; cyclone filter
122; Sludge collection bag filter
130; Dirty coolant line
140; supply pump
150; clean tank
152; Oil and water separation unit
160; Clean coolant supply pipe
170; high pressure pump
180; Clean coolant outlet pipe
190; bypass pipe
192; on/off valve

Claims (4)

공작기계에서 배출되며, 슬러지가 포함된 더티 절삭유가 저장되는 더티탱크;
상기 더티탱크로부터 상기 더티 절삭유를 수령하여 슬러지를 분리하여 클린 절삭유를 배출하는 사이클론 필터;
상기 더티탱크와 상기 사이클론 필터를 연결하는 더티 절삭유 공급관;
상기 더티 절삭유 공급관을 통해 상기 사이클론 필터로 상기 더티 절삭유를 공급하는 공급펌프;
상기 사이클론 필터로부터 상기 클린 절삭유를 수령하여 저장하는 클린탱크;
상기 클린탱크에 저장된 클린 절삭유를 상기 공작기계로 공급하는 고압펌프;
상기 클린탱크와 상기 고압펌프를 연결하는 클린 절삭유 공급관;
상기 고압펌프와 상기 공작기계를 연결하는 클린 절삭유 배출관; 및,
상기 클린 절삭유 배출관의 일부영역에서 분기되어 상기 더티 절삭유 공급관과 연결되며, 상기 사이클론 필터의 초기 구동시 클린 절삭유를 공급하는 바이패스관;을 포함하며,
상기 바이패스관에 설치되어 절삭유가 상기 더티 절삭유 공급관으로 공급 또는 차단되게 하는 개폐밸브와,
상기 고압펌프의 동작시 상기 개폐밸브가 개방되도록 하고, 상기 고압펌프의 동작이 미리 설정된 시간이 도래하면 상기 개폐밸브가 폐쇄되도록 제어하는 제어부를 더 포함하는 절삭유 쿨런트 장치.
a dirty tank for storing dirty cutting oil discharged from the machine tool and containing sludge;
a cyclone filter that receives the dirty cutting oil from the dirty tank, separates sludge, and discharges clean cutting oil;
a dirty cutting oil supply pipe connecting the dirty tank and the cyclone filter;
a supply pump supplying the dirty cutting oil to the cyclone filter through the dirty cutting oil supply pipe;
a clean tank receiving and storing the clean cutting oil from the cyclone filter;
a high-pressure pump supplying the clean cutting oil stored in the clean tank to the machine tool;
a clean cutting oil supply pipe connecting the clean tank and the high-pressure pump;
a clean cutting oil discharge pipe connecting the high-pressure pump and the machine tool; and,
A bypass pipe branched from a part of the clean cutting oil discharge pipe, connected to the dirty cutting oil supply pipe, and supplying clean cutting oil during initial operation of the cyclone filter;
An on/off valve installed in the bypass pipe to supply or block cutting oil to the dirty cutting oil supply pipe;
Cutting oil coolant device further comprising a control unit for controlling the opening/closing valve to open when the high pressure pump operates, and to close the opening/closing valve when the operation of the high pressure pump reaches a preset time.
 청구항 1에 있어서,
상기 클린탱크는 유수분리부를 더 포함하는 절삭유 쿨런트 장치.
The method of claim 1,
The clean tank further comprises an oil and water separator.
 청구항 1에 있어서,
상기 사이클론 필터의 하부에 설치된 슬러지 포집 백필터를 더 포함하는 절삭유 쿨런트 장치.
The method of claim 1,
Cutting oil coolant device further comprising a sludge collection bag filter installed below the cyclone filter.
 삭제delete
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KR102546551B1 true KR102546551B1 (en) 2023-06-22

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001328047A (en) * 2000-05-23 2001-11-27 Mitsubishi Materials Corp Polluted water purifying device for cutting machine
JP2020040186A (en) * 2018-09-12 2020-03-19 住友精密工業株式会社 Coolant supply device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001328047A (en) * 2000-05-23 2001-11-27 Mitsubishi Materials Corp Polluted water purifying device for cutting machine
JP2020040186A (en) * 2018-09-12 2020-03-19 住友精密工業株式会社 Coolant supply device

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