KR20200087528A - Coolant filter apparatus for machine tool - Google Patents

Abstract

The present invention relates to a coolant filter apparatus for a machine tool. The present invention is a configuration provided with a function of removing a foreign matter (12) from a filter (300) through air bubbles (13) so that a situation in which the filter (300) is not clogged by the foreign matter (12) occurs. Through the above configuration, fine foreign matter contained in a coolant can be more effectively filtered, so that a filtering function of the foreign matter (12) can be further improved. The coolant filter apparatus for the machine tool includes a housing, the filter, and an air supply port.

Description

Coolant filter device for machine tools {COOLANT FILTER APPARATUS FOR MACHINE TOOL}

The present invention relates to a coolant filter device for a machine tool, and more particularly, to a coolant filter device for a machine tool that can more effectively filter fine foreign matter contained in the coolant.

In general, a machine that processes a metal or non-metal material using a suitable tool by cutting or non-cutting method is called a machine tool. Machine tools, such as lathes, milling, grinders, drill machines, tapping machines, boring machines, etc. In addition to general-purpose machine tools, there are NC (Numerical Control) machine tools, CNC (Computer Numerical Control) machine tools, turning centers, and Machining Center Tools.

When machining a workpiece using a tool in a machine tool, the coolant (cutting oil) is sprayed and supplied using a nozzle provided in the machine tool to the area where the tool and the workpiece are in contact, which cools the tool and the workpiece. It serves to lubricate the role and the main shaft, and is used throughout the machining area to process the workpiece.

The coolant is stored in the coolant tank provided in the machine tool, and the coolant stored in the coolant tank moves through the coolant line by the operation of the pump, and the coolant line is finally connected to the nozzle provided in the machine tool. Coolant is sprayed to the desired area through the nozzle.

On the other hand, when the workpiece is cut by a tool, a foreign substance called a cutting chip is generated. Among the foreign substances, a relatively bulky foreign substance is primarily filtered, so that it is blocked from mixing with the coolant. It mixes with the runt and flows into the coolant tank.

When the coolant containing fine foreign matter is sprayed onto the main shaft in which the workpiece is processed, it causes a damage to the main shaft, and in particular, the quality of the workpiece is deteriorated.

Therefore, although a filter device is installed and used on the path of the coolant, most of the filter devices have no function of removing the foreign material from the filter when the filter is clogged by the foreign material due to the foreign matter sticking to the filter. Accordingly, there is a disadvantage that the filter function for removing foreign substances cannot be effectively performed.

The matters described as the above background technology are only for improving understanding of the background of the present invention, and should not be taken as an admission that it corresponds to the prior art already known to those skilled in the art.

Republic of Korea Patent Publication No. 10-2015-0037433

The present invention is a coolant filter device for a machine tool having a function of removing a foreign material from a filter so that the filter is not blocked by a foreign material, so that the fine foreign matter contained in the coolant can be more effectively filtered, The purpose of this is to prevent damage to the main shaft by foreign matters and to improve the processing quality of the work piece.

Coolant filter device for a machine tool of the present invention for achieving the object of the above, the first port to which the coolant containing foreign matter flows, the second port from which the clean coolant from which the foreign matter is removed, and the foreign matter are A housing having a third port through which the included dirty coolant is discharged; A filter installed in the housing to filter foreign matter contained in the coolant; And an air supply mechanism configured to supply air to the filter so that foreign matters attached to the filter can be separated by using air bubbles.

The housing includes an upper housing provided with a first port and a second port; A lower housing connected to a lower portion of the upper housing and having a third port; And a cover covering the upper housing.

The upper housing is configured to be separated into an upper chamber and a lower chamber through a partition wall; The upper chamber and the lower chamber are connected only through a connecting passage; The filter is characterized in that it is installed to be located in the lower chamber and the lower housing.

The first port is connected to the lower chamber of the upper housing; The second port is connected to the upper chamber of the upper housing; The third port is characterized in that it is connected to the lowest position of the lowest water level in the lower housing.

The filter is characterized in that it is formed in a cylindrical shape and the upper end is combined with a partition wall to be connected to a connection passage.

The air supply mechanism is a pipe installed to be located in the cylindrical filter through the cover and the connection passage; An air compressor connected to the pipe; And a first check valve provided on the pipe; The first check valve is characterized in that it is opened only when air is supplied from the air compressor to the pipe and is kept closed so that air does not flow backward from the pipe to the air compressor.

The third port is connected to the drain pipe; A second check valve is provided on the drain pipe; The second check valve is characterized in that it automatically opens when the internal pressure of the housing exceeds the set pressure, and maintains a closed state when the pressure is below the set pressure.

The coolant filter device for a machine tool according to the present invention is configured to more effectively filter fine foreign matter contained in the coolant, thereby preventing damage to the main shaft by the foreign matter and improving the processing quality of the work piece. There is an effect that can be achieved.

In addition, the filter device according to the present invention is provided with a function to remove foreign substances from the filter through air bubbles so that the filter is not blocked by foreign substances, through which the filtering function of the foreign substances can be further improved. It works.

1 is a schematic configuration diagram of a spindle coolant device,
Figure 2 is a block diagram of a high-pressure coolant device used in Figure 1,
3 and 4 are views for explaining an external front view and an internal configuration of a coolant filter device according to the present invention.

Hereinafter, a coolant filter device for a machine tool according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

When cutting a workpiece using a tool in a machine tool, the coolant (cutting oil) is sprayed and supplied using a nozzle provided in the machine tool to the area where the tool and the workpiece come into contact, which cools the tool and the workpiece. It serves to lubricate the main axis and to lubricate the main axis, and is used throughout the machining area to process the workpiece.

1 to 2, the coolant 1 is stored in the coolant tank 2, and the coolant stored in the coolant tank 2 is operated by the pump 3 to coolant line 4 Through it is moved to the high-pressure coolant device (5).

The high-pressure coolant device 5 is a filter device 100 according to the present invention, a reservoir 7 storing the clean coolant 6 passing through the filter device 100, and a clean cool stored in the reservoir 7 It includes a high pressure pump (8) for pumping the runt (6) at high pressure, the high pressure pump (8) is connected to the nozzle device (10) passing through the main shaft (9) through the coolant line (4).

Therefore, when the work piece is cut by the tool that is bitten on the main shaft 9, a foreign substance called a cutting chip is generated, and the foreign substance is mixed with the coolant injected through the nozzle device 10 to the coolant tank 2 Is returned.

The coolant (1) stored in the coolant tank (2) is a coolant mixed with foreign substances, and the coolant mixed with foreign substances flows into the filter device (100) of the high pressure coolant device (5) by the operation of the pump (3). The clean coolant 6 that has passed through the filter device 100 is stored in the reservoir 7 and is supplied to the nozzle device 10 installed to penetrate the main shaft 9 by the operation of the high pressure pump 8 Will cycle repeatedly.

On the other hand, the coolant filter device 100 according to the present invention, as shown in Figures 3 to 4, the first port 211 into which the coolant 1 containing foreign matter flows, the clean coolant from which the foreign matter is removed (6) a housing 200 having a second port 212 through which the discharge is discharged, and a third port 221 through which the dirty coolant 11 containing foreign substances is discharged; A filter 300 installed in the housing 200 to filter the foreign matter 12 from the coolant 1 containing the foreign matter; And an air supply mechanism 400 configured to supply air to the filter 300 so that foreign matters attached to the filter 300 can be separated by using the air bubbles 13.

The housing 200 is an upper housing 210 provided with a first port 211 and a second port 212, connected to a lower portion of the upper housing 210, and a lower housing provided with a third port 221 ( 220); And a cover 330 covering the upper housing 210.

The coolant stored in the coolant tank (2) is a coolant (1) containing foreign matter, moves along the coolant line (4) when the pump (3) is operated, and flows into the first port (211). The coolant 1 introduced into the interior of the housing 200 through the port 211 passes through the filter 300 and the foreign matter 12 is filtered, and the clean coolant 6 in which the foreign matter 12 is filtered is made of After being discharged through the 2 port 212 and stored in the storage 7, it is supplied to the nozzle device 10 when the high pressure pump 8 is operated.

Then, the foreign matter 12 filtered by the filter 300 is mixed with the coolant through the third port 221 during the opening operation of the second check valve, which will be described later, and then discharged to the outside through the drain pipe.

According to the present invention, the upper housing 210 is configured to be separated into the upper chamber 214 and the lower chamber 215 through the partition wall 213, and the upper chamber 214 and the lower chamber 215 are connected passages 216 ), the filter 300 is installed to be located in the lower chamber 215 and the lower housing 220, the first port 211 is connected to the lower chamber 215 of the upper housing 210, , The second port 212 is connected to the upper chamber 214 of the upper housing 210.

Through this structure, the coolant 1 including the foreign material 12 and the clean coolant 6 from which the foreign material 12 is removed by the filter 300 can be prevented from being mixed with each other.

In addition, the present invention is a configuration in which the third port 221 is connected to the lowermost position of the lowest water level in the lower housing 220, through which the discharge of the dirty coolant 11 containing the foreign material 12 is more It can be easily done.

The filter 300 according to the present invention is formed in a cylindrical shape and is configured to be connected to the connection passage 216 by being coupled to the partition wall 213.

And, the air supply mechanism 400 is a pipe 410 installed to be located in the cylindrical filter 300 through the cover 230 and the connection passage 216, the air compressor 420 connected to the pipe 410, and It includes a first check valve 430 provided in the pipe 410, the first check valve 430 is opened only when air is supplied from the air compressor 420 toward the pipe 410 and the pipe 410 ) To the air compressor 420 to maintain a closed state to prevent air from flowing backward.

In addition, the third port 221 is connected to the drain pipe 510, the drain pipe 510 is provided with a second check valve 520, the second check valve 520 is a housing 200 Automatically opens when the internal pressure exceeds the set pressure, and maintains the closed state when the pressure is below the set pressure.

Therefore, when the coolant 1 containing the foreign matter 12 stored in the coolant tank 2 flows into the interior of the housing 200 through the first port 211 by the operation of the pump 3, the foreign matter Coolant 1 with 12 is moved from the outside of the filter 300 toward the inside as shown by arrow M1.

The foreign matter 12 adheres to the outer surface of the filter 300 by the movement of the coolant 1, and the clean coolant 6 from which the foreign matter 12 is removed is filtered as shown by the arrow M2 ( It is stored in the reservoir 7 of the high-pressure coolant device 5 through the internal space of the 300 and the connection passage 216 and the second port 212.

Then, when the air is introduced into the inner space of the filter 300 through the pipe 410 by the operation of the air compressor 420, air bubbles 13 are generated in the inner space of the filter 300, and these air bubbles ( 13) the foreign matter 12 attached to the outer surface of the filter 300 is separated from the filter 300.

Then, as the foreign material 12 accumulates in the interior of the housing 200 and accumulates, when the internal pressure of the housing 200 exceeds a set pressure, the second check valve 520 is automatically opened (that is, the Cracking pressure (conditions when cracking pressure occurs), at this time, the foreign matter 12 and the coolant 11 in a state in which the coolant is mixed together are discharged to the outside through the drain pipe 510.

As described above, the filter device 100 according to the present invention is a configuration capable of more effectively filtering the fine foreign matter contained in the coolant, thereby preventing damage to the main shaft by the foreign matter and improving the processing quality of the workpiece. There is an advantage that can promote.

In addition, the filter apparatus 100 according to the present invention has a function of removing the foreign matter 12 from the filter 300 through the air bubbles 13 so that the situation in which the filter 300 is blocked by the foreign matter 12 does not occur. With the configuration provided, this has the advantage of further improving the filtering function of the foreign material 12.

Although the present invention has been illustrated and described in relation to specific embodiments, it is understood in the art that the present invention can be variously improved and changed within the limits that do not depart from the technical spirit of the present invention provided by the following claims. It will be obvious to those of ordinary skill.

1-Coolant containing foreign substances 6-Clean coolant
11-Dirty Coolant 100-Filter device
200-Housing 210-Upper housing
211-Port 1 212-Port 2
213-Bulkhead 214-Upper chamber
215-Lower chamber 216-Connecting passage
220-Lower housing 221-Port 3
230-Cover 300-Filter
400-Air supply mechanism 410-Air compressor
420-Pipe 430-First check valve
510-Drain pipe 520-Second check valve

Claims (7)

A housing having a first port through which coolant containing foreign matter flows, a second port through which clean coolant from which foreign matter is removed is discharged, and a third port through which dirty coolant containing foreign matter is discharged;
A filter installed in the housing to filter foreign matter contained in the coolant; And
Coolant filter device for a machine tool comprising a; air supply mechanism configured to supply air to the filter to separate the foreign matter attached to the filter using air bubbles. The method according to claim 1,
The housing includes an upper housing provided with a first port and a second port;
A lower housing connected to a lower portion of the upper housing and having a third port; And
A cover for covering the upper housing; Coolant filter device for a machine tool comprising a. The method according to claim 2,
The upper housing is configured to be separated into an upper chamber and a lower chamber through a partition wall;
The upper chamber and the lower chamber are connected only through a connecting passage;
The filter is a coolant filter device for a machine tool, characterized in that installed in the lower chamber and the lower housing. The method according to claim 3,
The first port is connected to the lower chamber of the upper housing;
The second port is connected to the upper chamber of the upper housing;
The third port is a coolant filter device for a machine tool, characterized in that connected to the lowest position of the lowest water level in the lower housing. The method according to claim 3,
The filter is formed in a cylindrical shape and the upper end of the coolant filter device for a machine tool, characterized in that configured to be connected to a connecting passage through a partition wall. The method according to claim 3,
The air supply mechanism is a pipe installed to be located in the cylindrical filter through the cover and the connection passage;
An air compressor connected to the pipe; And
It includes a first check valve provided on the pipe;
The first check valve is opened only when air is supplied from the air compressor to the pipe, and the coolant filter device for a machine tool, characterized in that it maintains a closed state to prevent backflow of air from the pipe to the air compressor. The method according to claim 1,
The third port is connected to the drain pipe;
A second check valve is provided on the drain pipe;
The second check valve automatically opens when the internal pressure of the housing exceeds a set pressure, and maintains a closed state when the set pressure is below a set pressure.

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