KR101531858B1 - High pressure cutting oil supplying device for machining center - Google Patents

High pressure cutting oil supplying device for machining center Download PDF

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Publication number
KR101531858B1
KR101531858B1 KR1020140035758A KR20140035758A KR101531858B1 KR 101531858 B1 KR101531858 B1 KR 101531858B1 KR 1020140035758 A KR1020140035758 A KR 1020140035758A KR 20140035758 A KR20140035758 A KR 20140035758A KR 101531858 B1 KR101531858 B1 KR 101531858B1
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KR
South Korea
Prior art keywords
coolant
filter
cyclone filter
filtering
cutting oil
Prior art date
Application number
KR1020140035758A
Other languages
Korean (ko)
Inventor
정수훈
이한승
Original Assignee
아메코 주식회사
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Publication date
Application filed by 아메코 주식회사 filed Critical 아메코 주식회사
Priority to KR1020140035758A priority Critical patent/KR101531858B1/en
Application granted granted Critical
Publication of KR101531858B1 publication Critical patent/KR101531858B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0217—Separation of non-miscible liquids by centrifugal force
    • 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
    • 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

Abstract

The present invention relates to a filtering unit connected to a coolant tank for receiving coolant discharged from a machine tool and filtering the coolant transferred from the coolant tank and a transfer unit for transferring the filtered coolant filtered by the filtering unit to the machine tool The filtering unit includes a cyclone filter for filtering the cutting oil through a specific gravity separation by a centrifugal force, and a filter disposed inside the cyclone filter for filtering the flowing coolant oil by a mesh, The present invention relates to a high-pressure cutting oil supply device for a machine tool, and more particularly, to a high-pressure cutting oil supply device for a machine tool, Even if it does occur, So can.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-pressure cutting oil supply apparatus for a machine tool,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure coolant supply device for a machine tool for filtering a coolant discharged during metal working of a machine tool and re-supplying the coolant to a machine tool at a high pressure.

Cutting oil protects the tool by cooling and lubricating the cutting tool during the cutting process using the machine tool, and minimizes the deformation of the material due to heat generation during machining. During the metal machining of the machine tool, the cutting fluid containing the metal chips is discharged. After collecting the metal chips and the cutting oil, the high-pressure cutting oil supply device is used to re-supply the filtered cutting oil to the machine tool at high pressure.

The high-pressure coolant supply device generally has a configuration including a filtering unit for filtering the coolant in the coolant tank and a high-pressure pump for transferring the filtered coolant filtered by the filtering unit to the machine tool.

As a constitution of the filtering unit, a bag filter system (see Japanese Patent Application Laid-Open No. 10-2004-0098721) to which a bag filter (or mesh filter) for filtering cutting oil is generally applied through a mesh And a cyclone filter system to which a cyclone filter for filtering cutting oil is applied (see Japanese Laid-Open Patent Application No. 10-2008-0071535).

In the bag filter method, the cutting oil supplied to the inside of the bag filter is filtered while passing through the bag filter. As the sludge generated during filtration accumulates in the bag filter, the bag filter frequently needs to be replaced. .

The cyclone filter method is advantageous in that it is not necessary to replace the filter as in the bag filter method. However, when the supply pressure of the coolant supplied to the cyclone filter fluctuates, there is a problem in that the centrifugal force is changed and the filtration performance is difficult to secure.

Published Japanese Patent Application No. 10-2004-0098721 Published Patent Publication No. 10-2008-0071535

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a high-pressure coolant supply device for a machine tool capable of always achieving a filtration performance higher than a predetermined level,

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

In order to achieve the above-mentioned object, the present invention provides a cutting machine, comprising: a filtering unit connected to a coolant tank for receiving coolant discharged from a machine tool and for filtering coolant transferred from the coolant tank; The filtering unit includes a cyclone filter for filtering the cutting oil through specific gravity separation by a centrifugal force, and a high-pressure pump disposed inside the cyclone filter for filtering the introduced coolant through a mesh, And a mesh filter for discharging the filtration cutting oil to the upper side of the mesh filter.

According to the apparatus for supplying high-pressure coolant for a machine tool of the present invention, a coolant supply member having a supply flow path for supplying coolant to the inside of the cyclone filter may be installed at one side of the cyclone filter, A coolant supply member having a discharge passage communicating with the inside of the mesh filter may be installed so that the coolant can be discharged.

According to the apparatus for supplying high-pressure coolant for a machine tool of the present invention, an upper cover having a connection flow path connected to a flow path of the coolant supply member may be provided on the cyclone filter.

According to the apparatus for supplying high-pressure coolant for a machine tool of the present invention, the cyclone filter can be connected to the support frame by a rotary joint so as to be rotatable.

According to the present invention, the rotary joint includes a first rotary joint installed at one side of the cyclone filter and connected to a hose for supplying cutting oil, and a second rotary joint installed at the other side of the cyclone filter, And a second rotary joint connected to the discharge passage of the member.

According to the apparatus for supplying high-pressure coolant for a machine tool of the present invention, a drain valve for discharging sludge disposed between the cyclone filter and the mesh filter may be installed at a lower portion of the cyclone filter. Here, the drain valve may have the form of an automatic opening valve that is opened for a predetermined period of time, and a sludge box for collecting the sludge may be installed below the drain valve.

According to the high pressure cutting oil supply device for a machine tool of the present invention, a clean tank may be provided between the filtering unit and the machine tool to receive the filtered cutting oil filtered by the filtering unit. A clean room in which the filtration cutting oil is accommodated and a pump room in which the high pressure pump is installed may be formed independently of each other in the clean tank, and a planar filter for filtering the filtering oil may be installed in the clean room Or more. In addition, a level switch for sensing the level of the coolant may be installed in the clean room, and the controller may control the operation of the high-pressure pump based on the detection result of the level switch.

According to the present invention having the above-described structure, by applying the filtering unit provided with the mesh filter inside the cyclone filter, even if the supply pressure of the coolant supplied to the filtering unit changes, the filtration performance can be secured above a certain level.

According to the above configuration, since the sludge is loaded between the cyclone filter and the mesh filter, there is an advantage that the consumption of the mesh filter is hardly consumed.

In addition, the sludge is automatically discharged through the drain valve to increase the cleaning cycle, and the filtering unit can be rotated in the posture, thereby facilitating the replacement and cleaning of the filter.

1 is a sectional view of a high-pressure coolant supply device for a machine tool according to an embodiment of the present invention;
2 is a plan view of the high-pressure coolant supply device for a machine tool shown in FIG. 1;
3 is a block diagram of a high-pressure coolant supply device for a machine tool according to an embodiment of the present invention.
Fig. 4 is a side view showing a posture changing operation of the filtering unit shown in Fig. 1; Fig.
Fig. 5 is an operational state diagram showing a filtering operation of the filtering unit shown in Fig. 1. Fig.

Hereinafter, a high-pressure coolant supply device for a machine tool according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a high-pressure cutting fluid supply device for a machine tool according to an embodiment of the present invention, and FIG. 2 is a plan view of the high-pressure cutting fluid supply device for a machine tool shown in FIG. 3 is a block diagram of a high-pressure coolant supply apparatus for a machine tool according to an embodiment of the present invention.

1 to 3, the high-pressure coolant supply device of the present embodiment includes a filtering unit 110 for filtering the coolant oil transferred from the coolant tank 101, a filter unit 110 for filtering the filtered coolant, And a high-pressure pump 119 that provides a transfer force for transferring the toner to the transfer chamber M / C.

The filtering unit 110 is connected to a coolant tank 101 for receiving the coolant discharged from the machine tool M / C and a coolant supply line for supplying coolant to the coolant tank 101 and the filtering unit 110, A feed pump 105 is provided to provide a feed force.

The filtering unit 110 has a configuration including a cyclone filter 111 and a mesh filter 112.

The cyclone filter 111 is connected to the coolant supply line and filters the coolant through separation of the specific gravity by the centrifugal force. Since the configuration and operation principle of the cyclone filter 111 are well known, detailed description thereof will be omitted.

The mesh filter 112 is disposed inside the cyclone filter 111 and is configured to filter the coolant filtered by the cyclone filter 111 by a mesh. The mesh filter 112 is configured to filter cutting oil flowing through the outer periphery of the mesh filter 112 and to discharge the filtering cutter oil inside the filtering filter 112 to the upper side. The mesh filter / can be formed in the form of a cylindrical mesh as shown in Figs.

A coolant supply member 113 having a supply passage for supplying coolant to the inside of the cyclone filter 111 may be installed at one side of the cyclone filter 111. [ The cutting oil supply member 113 can be installed on the outer periphery of the cyclone filter 111 and is configured to communicate with the inside of the cyclone filter 111 and the coolant supply line.

The other end of the cyclone filter 111 may be provided with a coolant supply member 114 having a discharge flow path through which the filtration coolant in the mesh filter 112 is discharged. The discharge passage of the coolant supply member 114 communicates with the interior of the mesh filter 112 and is configured to discharge the filtered coolant in the mesh filter 112 toward the high pressure pump 119.

The cutting oil supply member 114 is installed on the outer periphery of the cyclone filter 111 and has a structure communicating with the inside of the mesh filter 112 through the upper cover 115 provided at the upper opening of the cyclone filter 111 have. The upper cover 115 may be provided with a connection flow path 116 connected to the flow path of the coolant supply member 114.

The filtering unit 110 is supported by the support frame 120 and a wheel 125 may be installed under the support frame 120 so that the support frame 120 can be moved. The cyclone filter 111 may be connected to the support frame 120 by means of rotary joints 131 and 132 so as to be rotatable. The rotary joints 131 and 132 may be rotatably installed in holders 121 and 122 fixed to the support frame 120 and fixed between the holders 121 and 122 and the rotary joints 131 and 132 through separate clamping devices. . The posture of the cyclone filter 111 can be changed by rotating the cyclone filter 111 as shown in FIG. 4 after the clamping of the clamp device is released or when the filter is cleaned.

The rotary joints 131 and 132 may have a configuration including a first rotary joint 131 installed at one side of the cyclone filter 111 and a second rotary joint 132 installed at the other side of the cyclone filter 111 . The first rotary joint 131 provides a flow path for supplying cutting oil to the inside of the cyclone filter 111 and the second rotary joint 132 provides a flow path through which the cutting oil discharged from the cutting oil discharge member 114 is discharged .

The first rotary joint 131 may be connected to the hose 135 for supplying coolant through the connecting member 133. The connecting member 133 is rotatably coupled to the first rotary joint 131 and a coupler 134 for coupling with the hose 135 for supplying the coolant may be installed in the lower portion of the connecting member 133. The first rotary joint 131 fixed to the cyclone filter 111 relatively rotates with respect to the connecting member 133 even if the cyclone filter 111 rotates to change its posture so that the hose 135 Can be prevented from rotating together with the cyclone filter 111.

The second rotary joint 132 is connected to the discharge passage of the coolant supply member 114 and the discharge pipe 135. The filtered coolant discharged from the coolant supply member 114 flows through the second rotary joint 132, (135).

A drain valve 130 for discharging sludge is installed in the lower portion of the cyclone filter 111. The drain valve 130 may have the form of an automatic opening valve that is opened for a predetermined period of time, And a sludge box 127 for collecting sludge may be installed in the lower part. The support frame 120 may have a receiving space in which the sludge box 127 is received and supported.

On one side of the filtering unit 110, a clean tank 140 may be provided to receive filtration coolant filtered by the filtering unit 110. The clean tank 140 is connected to the filtering unit 110 and the machine tool M / C respectively. The filtered coolant contained in the clean tank 140 is supplied to the machine tool M / C).

A control panel 170 may be provided outside the clean tank 140 and a control unit may be provided inside the control panel 170 to control the operation of the high-pressure coolant supply device.

In the clean tank 140, a clean room 141 in which the filtration cutting oil is received and a pump room 142 in which the high pressure pump 119 is installed are formed independently of each other.

The clean room 141 is connected to the discharge pipe 135 to receive the filtration coolant discharged from the discharge pipe 135. The outlet of the discharge pipe 135 is set to have a position higher than the inlet thereof in order to maintain the water level in the cyclone filter 111 at a predetermined level or higher.

One or more flat-plate filters 151 and 152 for filtering the filtering cutting oil may be installed in the clean room 141. In this embodiment, two flat-plate filters 151 and 152 are illustrated. The flat plate filters 151 and 152 are provided to supplement the function of the filtering unit 110 and allow the unfiltered cutting oil to be supplied to the machine tool M / C when a problem occurs in the operation of the filtering unit 110 .

Drains 144 and 145 for discharging cutting oil are installed on the side surfaces of the clean room 141 and the pump room 142, respectively. A clean room discharge port 143 through which the filtration cutting oil is discharged from the clean room 141 is provided between the clean room 141 and the pump room 142. The filtration coolant of the pump room 142 is supplied to the pump room 142 And a pump room discharge port 146 for discharge to the machine tool M / C side.

On the other hand, a level switch 160 for detecting the level of the filtering cutting oil may be installed in the clean room 141. The control unit is configured to control the operation of the high-pressure pump 119 or the supply pump 105 based on the detection result of the level switch 160.

When the level of the filtration cutting oil reaches the predetermined lowest level as a result of the detection by the level switch 160, the control unit stops the operations of the high-pressure pump 119 and the supply pump 105 to cause damage to the high- prevent. Further, when the level of the filtration cutting oil reaches the highest level as a result of the detection of the level switch 160, the control unit stops the operation of the supply pump 105 to prevent the supply of the coolant to the cyclone filter 111, ≪ / RTI >

A pressure switch is provided on an outgoing line of the high-pressure pump 119, and the pressure switch is configured to generate a signal when the pressure exceeds a preset pressure. The high-pressure pump 119 is provided with an inverter for controlling the motor of the high-pressure pump 119, and the inverter is connected to the pressure switch to constantly control the rotation speed of the high-pressure pump based on the result of the pressure switch. Thus, by controlling the discharge pressure of the high-pressure pump 119 to be constant, the life of the high-pressure pump 119 can be extended and the energy efficiency can be increased.

Hereinafter, an operating state of the high-pressure cutting fluid supply apparatus for a machine tool according to the present invention will be described with reference to FIG. Fig. 5 is an operating state diagram showing the filtering operation of the filtering unit shown in Fig. 1, and the arrows shown in Fig. 5 show the moving direction of the cutting oil.

The cutting oil flowing into the cyclone filter 111 through the cutting oil supply hose 135, the first rotary joint 131 and the cutting oil supply member 113 is rotated along the inner periphery of the cyclone filter 111, The centrifugal force is generated and the sludge and the cutting oil are separated by the specific gravity difference. The cutting oil rotating in the cyclone filter 111 flows into the inside from the outer periphery of the mesh filter 112 and the cutting oil is secondly filtered by the mesh of the mesh filter 112 in this process.

The filtration cutting oil in the mesh filter 112 is discharged to the upper side of the mesh filter 112 and passes through the connection passage 116 of the upper cover 115 and the discharge passage of the coolant supply member 114 to the second rotary joint 132 . The coolant discharged from the second rotary joint 132 is discharged to the clean room 141 of the clean tank 140 through the discharge pipe 135.

The filtration cutting oil accommodated in the clean tank 140 is filtered again through the flat plate type filters 151 and 152 and then discharged to the pump room 142. The suction force supplied by the high pressure pump 119 inside the pump room 142 To be supplied to the machine tool (M / C).

The sludge S is loaded between the inner periphery of the cyclone filter 111 and the outer periphery of the mesh filter 112 in accordance with the filtering operation of the filtering unit 110 and the loaded sludge S is introduced into the lower portion of the cyclone filter 111 And is discharged to the sludge box 127 through the installed drain valve 130. The control unit controls the operation of the drain valve 130 so that the drain valve 130 is automatically opened and closed every predetermined period. According to such a configuration, sludge is not accumulated inside the bag filter (mesh filter) like the conventional bag filter system, but the sludge S is accumulated outside the mesh filter 112. Therefore, There is little need to do so.

While the present invention has been particularly shown and described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the disclosed embodiments and drawings, Various modifications may be made by those skilled in the art.

Claims (6)

A filtering unit connected to a coolant tank for receiving coolant discharged from a machine tool and filtering the coolant transferred from the coolant tank; And
And a high-pressure pump for providing a transfer force for transferring the filtered coolant filtered by the filtering unit to the machine tool,
Wherein the filtering unit comprises:
A cyclone filter for filtering cutting oil through separation of specific gravity by centrifugal force; And
And a mesh filter disposed inside the cyclone filter for filtering the incoming coolant through a mesh and discharging the internal coolant to the upper side. The method according to claim 1,
A coolant supply member installed at one side of the cyclone filter and having a supply flow path for supplying coolant to the inside of the cyclone filter;
A coolant supply member provided on the other side of the cyclone filter and having a discharge flow path communicating with the inside of the mesh filter so that the filtration coolant can be discharged; And
Further comprising an upper cover installed at an upper portion of the cyclone filter and having a connection path connected to a discharge path of the coolant supply member. The method according to claim 1,
Further comprising a support frame for supporting the filtering unit,
Wherein the cyclone filter is connected to the support frame by a rotary joint so that the cyclone filter can rotate posture. The method according to claim 1,
Further comprising a drain valve installed at a lower portion of the cyclone filter for discharging the sludge disposed between the cyclone filter and the mesh filter at predetermined time intervals. The method according to claim 1,
A clean tank provided between the filtering unit and the machine tool, wherein the clean room in which the filtration cutting oil is accommodated and the pump room in which the high pressure pump is built are formed independently of each other;
A level switch installed inside the clean room for sensing the level of the coolant; And
Further comprising a controller for controlling the operation of the high-pressure pump based on the detection result of the level switch. 6. The method of claim 5,
A pressure switch installed on an outgoing line of the high-pressure pump; And
Further comprising an inverter for controlling the number of revolutions of the high-pressure pump based on a signal of the pressure switch.
KR1020140035758A 2014-03-27 2014-03-27 High pressure cutting oil supplying device for machining center KR101531858B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101718005B1 (en) 2015-09-17 2017-03-20 주식회사 삼화피엠아이 Supply device for cutting oil
KR20170033688A (en) 2015-09-17 2017-03-27 최선곤 Supply device for cutting oil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030052915A (en) * 2001-12-21 2003-06-27 재단법인 포항산업과학연구원 Method and Apparatus for Sludge Removal from BTX Absoprtion Oil
KR100506985B1 (en) * 2003-04-21 2005-08-09 김태형 Surface filter-type apparatus for filtrating oil mist using centrifugal force and method thereof
KR20090130966A (en) * 2008-06-17 2009-12-28 주식회사마스타텍 A filteration unit for supply device of metalworking fluids
KR20130001865A (en) * 2011-06-28 2013-01-07 주식회사 켐텍 High pressure coolant system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030052915A (en) * 2001-12-21 2003-06-27 재단법인 포항산업과학연구원 Method and Apparatus for Sludge Removal from BTX Absoprtion Oil
KR100506985B1 (en) * 2003-04-21 2005-08-09 김태형 Surface filter-type apparatus for filtrating oil mist using centrifugal force and method thereof
KR20090130966A (en) * 2008-06-17 2009-12-28 주식회사마스타텍 A filteration unit for supply device of metalworking fluids
KR20130001865A (en) * 2011-06-28 2013-01-07 주식회사 켐텍 High pressure coolant system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101718005B1 (en) 2015-09-17 2017-03-20 주식회사 삼화피엠아이 Supply device for cutting oil
KR20170033688A (en) 2015-09-17 2017-03-27 최선곤 Supply device for cutting oil

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