KR102613532B1 - Foreign matter cleaning device that removes foreign matter floating in cutting oil - Google Patents

Abstract

The present invention relates to a foreign matter cleaning device that removes foreign substances floating in cutting oil. More specifically, it relates to a foreign matter cleaning device, which includes a main body provided with a receiving space inside, an inlet through which cutting oil flows, and an outlet through which cutting oil is discharged; a pump disposed within the receiving space and allowing cutting oil to flow into the main body through an inlet and discharging the cutting oil to the outside through an outlet; and a foreign matter filtering device disposed in the receiving space and provided with a filter unit for removing foreign matter from the cutting oil flowing in from the inlet, a storage tank containing the cutting oil, one end of which is connected to the inlet of the foreign matter filtering device, and the other end disposed within the storage tank to remove foreign matter from the cutting oil flowing in from the inlet. A suction pipe that guides the contained cutting oil to be supplied to the foreign matter removal device, one end of which is connected to the outlet, and the other end of which is placed in the storage tank, so that the cutting oil from which foreign materials have been removed can be supplied into the storage tank by passing through the foreign matter filtering device. It includes a discharge pipe that guides the coolant and a skimmer device for supplying foreign substances in the cutting oil floating on the water surface of the storage tank to the foreign matter removal device through the suction pipe.

Description

Foreign matter cleaning device that removes foreign matter floating in cutting oil}

The present invention relates to a foreign matter cleaning device that removes foreign matter floating in cutting oil. Specifically, it relates to a foreign matter cleaning device that can effectively clean and remove fine foreign matter floating in cutting oil contained in a storage tank.

When machining with machine tools, injection machines, etc., cutting oil is used for various purposes such as cooling, lubrication, and improving processing quality. At this time, chips and injection waste from the processed workpiece are mixed with the cutting oil and collected in the storage tank for reuse.

In this way, foreign substances such as chips or injection waste mixed in the cutting oil contaminate the cutting oil and cause problems such as blocking the cutting oil pipe or deteriorating the quality of machining by circulating fine chips and spraying them at high pressure on the workpiece.

In order to solve the above problem, workers must frequently filter out chips with a scoop or periodically empty and clean the cutting oil tank, resulting in inefficiency. The conventional chip removal method not only reduces work efficiency, but also requires equipment to be shut down, resulting in a secondary problem of reduced productivity.

In addition, foreign substances of relatively large particle size accumulated at the bottom of the storage tank can be easily removed, but there is a problem that foreign substances made of fine particles are difficult to remove because they are floating in the cutting oil.

The present invention was created to solve the above-mentioned problems, and its technical purpose is to provide a foreign matter cleaning device that can easily remove foreign substances floating inside contaminated cutting oil at all times.

The foreign matter cleaning device of the present invention to achieve the above-described purpose is,

A main body with a receiving space inside, an inlet through which cutting oil flows in, and an outlet through which cutting fluid is discharged;

a pump disposed within the receiving space and allowing cutting oil to flow into the main body through an inlet and discharging the cutting oil to the outside through an outlet; and

A foreign matter filtering device disposed in the receiving space and provided with a filter unit for removing foreign matters from the cutting oil flowing in from the inlet;

A storage tank containing cutting oil,

A suction pipe, one end of which is connected to the inlet of the foreign matter filtering device and the other end of which is placed in the storage tank, to guide cutting oil containing foreign matter to be supplied to the foreign matter removal device;

A discharge pipe, one end of which is connected to the outlet and the other end of which is disposed within the storage tank, guides the cutting oil from which foreign substances have been removed through a foreign matter filter to be supplied into the storage tank;

It includes a skimmer device for supplying foreign substances in the cutting oil floating on the water surface of the storage tank to the foreign matter removal device through the suction pipe.

In the foreign matter cleaning device,

The skimmer device is,

A frame fixed to the storage tank,

It is installed on the frame to be able to move up and down, has a container shape, and includes a guide whose upper end can be positioned near the water surface of the storage tank,

The suction pipe can be inserted into the guide to suck in cutting oil flowing into the guide.

In the foreign matter cleaning device,

The frame may be provided with an installation hole into which the guide is inserted into the end of the suction pipe.

In the foreign matter cleaning device,

The height of the suction pipe may be adjusted in the vertical direction while being inserted into the installation hole.

In the foreign matter cleaning device,

The guide may be installed on a guide rod that can move up and down with respect to the frame.

In the foreign matter cleaning device,

The foreign matter filtering device further includes a controller that controls pump operation,

The controller is,

It may include a mode conversion switch that can select one of a cleaner mode that removes foreign substances settled in the reservoir and a skimmer mode that removes foreign substances floating around the water surface in the storage tank.

In the foreign matter cleaning device,

In the skimmer mode, the pump can adjust the suction degree by the suction power adjuster.

In the foreign matter cleaning device,

A bubble generating means may be installed at the other end of the discharge pipe to provide bubbles in the storage tank along with the discharged cutting oil.

In the foreign matter cleaning device,

The bubble generating means is,

An inlet path connected to the end of the discharge pipe and through which cutting fluid flows, a first path connected to the inlet path and a blocking portion disposed at the end of the inlet path that causes the cutting fluid to move by converting the movement path to the vertical direction, and It includes a second moving path that is connected to the first moving path and guides cutting oil in a direction perpendicular to the first moving path,

A mesh network having a plurality of first through holes may be installed in the first moving path to discharge the cutting oil moved through the discharge pipe to the outside.

In the foreign matter cleaning device,

A perforated tube in which a plurality of second through holes are formed is provided around the second movement path, and bubbles generated through the second through holes may be larger in size than bubbles generated through the mesh network.

The foreign matter cleaning device according to the present invention has the advantage of being able to automatically remove fine foreign matter floating on the surface of the cutting oil by adding a skimmer function to the function of cleaning foreign matter settled in water inside the basic cutting oil storage tank.

1 is a diagram showing a foreign matter cleaning device according to an embodiment of the present invention.
Figure 2 is a perspective view showing a skimmer device, which is a component of the foreign matter cleaning device shown in Figure 1.
Figure 3 is a plan view of Figure 2.
Figures 4 and 5 are diagrams showing cutting oil being sucked using a skimmer device.
FIG. 6 is a cross-sectional view showing a foreign matter filtering device, which is a component of the foreign matter cleaning device shown in FIG. 1.
Figure 7 is a perspective view of a bubble generating means, which is a component of the foreign matter cleaning device shown in Figure 1.
Figure 8 is a side view of the bubble generating means of Figure 7.
Figure 9 is a cross-sectional view taken along line IX-IX of Figure 8.
Figure 10 is a block diagram of mode switching of the foreign matter cleaning device of the present invention.

Embodiments of the present disclosure are illustrated for the purpose of explaining the technical idea of the present disclosure. The scope of rights according to the present disclosure is not limited to the embodiments presented below or the specific description of these embodiments.

All technical terms and scientific terms used in this disclosure, unless otherwise defined, have meanings commonly understood by those skilled in the art to which this disclosure pertains. All terms used in this disclosure are selected for the purpose of more clearly explaining this disclosure and are not selected to limit the scope of rights according to this disclosure.

Expressions such as “comprising,” “comprising,” “having,” and the like used in this disclosure are open terms that imply the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing the expression. It should be understood as (open-ended terms).

The singular forms described in this disclosure may include plural forms unless otherwise stated, and this also applies to the singular forms recited in the claims.

Expressions such as “first” and “second” used in the present disclosure are used to distinguish a plurality of components from each other and do not limit the order or importance of the components.

In this disclosure, when a component is referred to as being “connected” or “connected” to another component, it means that the component can be directly connected or connected to the other component, or as a new component. It should be understood that it can be connected or connected through other components.

The direction indicator of “upward” used in the present disclosure is based on the direction in which the guide moves in the skimmer device, and the direction indicator of “downward” means the opposite direction of upward.

As used in this disclosure, “cutting oil” is a by-product generated after processing metal and may refer to cutting chips that are finer than those generated during general cutting processing. Cutting oil is provided for lubrication, rust prevention, and cooling during cutting processing. It may be a coolant.

Embodiments are described with reference to examples shown in the accompanying drawings. In the accompanying drawings, identical or corresponding components are given the same reference numerals. Additionally, in the description of the following embodiments, overlapping descriptions of identical or corresponding components may be omitted. However, even if descriptions of components are omitted, it is not intended that such components are not included in any embodiment.

The present invention relates to a cleaning device that can constantly remove not only foreign substances such as cutting chips deposited on the bottom of a storage tank, but also fine foreign substances floating in cutting oil within the storage tank.

In addition, the present invention is a cleaning device that not only makes foreign substances in the storage tank float by using the discharge pressure by a pump in the process of supplying cutting oil from which foreign substances have been removed to the storage tank, but also floats on the water surface, thereby easily removing fine foreign substances. It's about.

The foreign matter cleaning device according to the present invention will be described as follows with reference to the attached drawings.

The foreign matter cleaning device 10 according to the present invention includes a foreign matter filtering device 20, a storage tank 30, a suction pipe 40, a discharge pipe 50, and a skimmer device 60.

The foreign matter filtering device 20 receives contaminated cutting oil from the storage tank 30, removes the foreign matter through an internal filter, and then discharges the cutting oil back into the storage tank 30. This foreign matter filtering device 20 includes a main body 21, a filter unit 22, a pump 23, a controller 24, and a suction power control unit 26.

The main body 21 constitutes the exterior of the foreign matter filtering device 20, and is entirely in the shape of a rectangular box, with a wheel 211 formed at the bottom, a lid 212 provided at the top, and a switch outside the center. (25) is formed.

Specifically, the wheels 211 at the bottom of the main body 21 are provided for the convenience of transportation of the foreign matter filtering device 20 so that the foreign matter filtering device 20 can be moved to various places, and a plurality of wheels 211 are provided at the lower part of the main body 21. There will be.

At the top of the main body 21, a lid 212 is hinged to detachably close the upwardly opened opening so that the internal filter unit 22 can be separated, and the lid 212 has a handle. It is prepared. In addition, the lid 212 is formed with an inlet 213 through which the cutting oil supplied from the reservoir 30 can flow. A holding portion is provided around the inlet 213 in the lid 212 to prevent the suction pipe 40 from being excessively bent. When the suction pipe 40 is sharply bent around the inlet 213, the inner diameter is rapidly narrowed and the suction pipe 40 containing foreign substances is easily clogged. To prevent this, a holding portion is provided on the lid 212.

The controller 24 is installed in the main body 21 and controls the operation of the pump 23. This controller 24 has a mode conversion switch 25 that can select one of a cleaner mode for removing foreign substances settled in the storage tank 30 and a skimmer mode for removing foreign substances floating around the water surface in the storage tank 30. Wow, it is connected to the suction power control unit 26, which can adjust the suction degree of the pump 23 in skimmer mode.

The switch 25 is formed outside the center of the main body 21 and is a mode conversion switch 25 that can select either a skimmer mode or a cleaner mode. When the operator selects the skimmer mode through the switch 25, floating foreign substances present in the cutting oil can be removed by suctioning them through the skimmer device 60. At this time, the operator can adjust the suction level to suit the needs by adjusting the suction power control unit. For example, it is possible to suck continuously floating fine foreign substances through the suction pipe 40 with low suction power, and it is possible to suck a large amount of fine foreign substances through the suction pipe 40 in a short period of time with high suction power.

In addition, when the operator selects the cleaner mode, it is configured to quickly suction foreign substances floating on the bottom of the storage tank 30 or in the cutting fluid in the storage tank 30 through the suction pipe 40 with maximum suction power.

Meanwhile, an outlet 214 through which cutting oil is discharged is provided in the central part of the main body 21. The cutting oil flows in through the suction pipe 40, passes through the filter unit 22, removes foreign substances, and then passes through the pump 23 and is discharged to the outside through the outlet 214. At this time, the cutting oil discharged through the outlet 214 enters the storage tank 30 through the discharge pipe 50.

The filter unit 22 is disposed in the receiving space and removes foreign substances from the cutting oil flowing in from the inlet 213.

Specifically, the filter unit 22 is disposed under the lid 212, includes a cylindrical tank 221 with an outlet at the bottom, and is disposed within the tank 221, the top of which is open, and a plurality of filter holes are formed on the side. It consists of a collection filter 222.

Contaminated cutting oil (O) flowing in through the inlet 213 flows into the collection filter 222, and then the foreign matter contained therein is filtered out, and only the cutting oil from which the foreign matter has been removed is collected through the filter hole of the collection filter 222. The coolant that enters the space between the filter 222 and the tank 221 and is then cleaned is moved toward the pump 23 through the outlet. When a certain amount of foreign matter or more is stored in the collection filter 222, the operator opens the lid 212, separates the collection filter 222, and removes the inside foreign matter. The collection filter 222 from which foreign substances have been removed is inserted back into the tank 221, and then a predetermined operation is performed again.

The pump 23 is disposed in the receiving space and flows cutting oil into the main body 21 through the inlet 213 and discharges the cutting oil to the outside through the outlet 214.

One side of this pump 23 is connected to the tank 221 by a connecting pipe 231, and the other side is connected to the outlet 214, so that the cutting oil flowing in through the tank 221 is discharged through the outlet 214. It is to do it. This pump 23 generates vacuum pressure inside the tank 221 and thus allows cutting oil to flow into the tank 221 through the inflow pipe. Additionally, the pump 23 allows cutting oil to be discharged to the outside through the outlet 214.

This pump 23 is connected to a controller, and the controller is connected to the switch 25 and the suction force control unit. By adjusting the switch 25, the operation of the pump 23 is selected between the cleaner mode and the skimmer mode, and when the skimmer mode is selected, the suction force can be precisely adjusted by the suction force control unit.

The storage tank 30 is a container that can contain cutting oil, and can be installed under or around the workpiece, and is configured to fill the inside with cutting oil that will be contaminated during the cutting process. A fixing part 31 for fixing the skimmer device 60 may be provided on one side of the storage tank 30.

The suction pipe 40 has one end connected to the inlet 213 and the other end immersed in the reservoir 30 to guide cutting oil containing foreign substances to be supplied to the foreign matter removal device. The suction pipe 40 is a pipe with excellent elasticity and may be typically made of synthetic resin or rubber. In this cleaner mode, the other end of the suction pipe 40 is disposed at a predetermined position within the storage tank 30 so that foreign substances floating on the bottom of the storage tank 30 or inside the storage tank 30 can be quickly removed.

In addition, in the skimmer mode, the suction pipe 40 is installed on the frame 61 and the other end is inserted into the guide 63 to suction foreign substances (W) in the cutting oil (O) floating on the water surface of the storage tank (30) together with the cutting oil. You can do it.

The discharge pipe 50 has one end connected to the outlet and the other end immersed in the storage tank 30 to guide the filtered cutting oil to be supplied into the storage tank 30. The cutting oil discharged from the outlet 214 by the pump 23 is discharged into the reservoir 30 with a predetermined discharge pressure through the discharge pipe 50, and at this time, a bubble generating means 70 is installed at the end of the discharge pipe 50. Since it is installed, air bubbles can be generated while passing through the bubble generating means (70).

The skimmer device 60 is used to supply foreign substances in the cutting oil floating on the water surface of the storage tank 30 to the foreign matter removal device through the suction pipe 40.

Specifically, the skimmer device 60 is installed in the storage tank 30 so that only the cutting oil near the water surface can be sucked in. A frame 61 is fixedly installed in the storage tank 30, and a guide 63 is movably installed on the frame 61 and has a cup shape, the upper end of which can be located near the water surface of the cutting oil in the storage tank 30. Including, the suction pipe 40 may be inserted into the guide 63 to suction the cutting oil flowing into the guide 63.

The frame 61 is fixedly installed in the storage tank 30, and a fixture is provided on one side to engage with the fixing part 31 of the storage tank 30, and an installation hole 612 is provided on the other side, and a guide is provided between them. An adjustment screw 611 is installed to adjust the vertical position of the rod 62.

The installation hole 612 of the frame has an inner diameter corresponding to the outer diameter of the suction pipe 40 so that the suction pipe 40 is inserted, and the suction pipe 40 can move in the vertical direction while being inserted into the installation hole 612. do. The operator inserts the suction pipe 40 into the installation hole 612 and then ensures that it is placed in an appropriate position.

The lower part of the guide rod 62 in the center of the frame 61 is connected to the guide 63, and the center can be fixed in position by an adjustment screw 611. This guide rod 62 is inserted into the first hole 613 at the center of the frame 61, is movable in the vertical direction, and is configured to contact the side of the adjustment screw 611. ) is configured to adjust the position of the guide rod 62 by tightening it.

At the bottom of the guide rod 62, a stopper 621 for fixing the height of the suction pipe 40 protrudes toward the center of the guide 63. The lower end of the suction pipe 40 can be fixed by the stopper 621, and thus the operator can properly perform suction work at a designated position.

The guide 63 is shaped like a container with an open top, and is configured to adjust its vertical position with respect to the frame 61 by the guide rod 62. When such an operator fixes the frame 61 in the storage tank 30, the upper and lower positions of the guide 63 can be adjusted by the guide rod 62 to keep the top of the guide 63 somewhat lower than the water level. .

After placing the suction pipe 40 inside the guide 63, adjust the height of the guide 63 so that the top of the guide 63 is positioned slightly lower than the water surface, and the coolant flows through the upper edge of the guide 63 through the guide ( 63) flows inside, and at this time, the suction pipe 40 absorbs the cutting oil flowing into the guide 63.

When the suction pipe 40 continuously sucks cutting oil, the cutting oil around the water surface in the storage tank 30 flows into the suction pipe 40 along with foreign substances floating on the water surface. This guide 63 allows only the cutting oil near the water surface, not the center of the reservoir 30, to be sucked in, thereby enabling the fine cutting oil on the water surface to be more effectively removed.

The bubble generating means 70 provides bubbles in the storage tank 30 together with the cutting oil discharged from the end of the discharge pipe 50.

This bubble generating means (70) consists of an upper part (71) and a lower part (72).

The upper part 71 has a cylindrical shape and has a plurality of passing holes 711 formed on the side. The upper part of the upper part 71 is in communication with the discharge pipe 50. The discharge pipe 50 extends downward from the open top to form an inlet path 712 through which cutting oil flows. A blocking portion is formed at the bottom of the inlet passage 712, so that the first movement path 713 is formed to change the movement path of the cutting oil to the vertical direction and allow the cutting oil to move in the horizontal direction.

A mesh network 714 having a plurality of first through holes for discharging the cutting oil moved through the discharge pipe 50 to the outside is formed in the first moving path 713. The mesh network 714 is installed to cross the through hole 711, so that the cutting oil flowing along the first movement path 713 passes through the mesh network 714, thereby generating fine air bubbles. At this time, the air bubble has a size in micrometer units. These fine air bubbles are introduced into the storage tank 30 together with the cutting oil.

Air bubbles have a negative charge, and these air bubbles combine with positively charged fine foreign substances floating in the cutting oil, allowing them to float to the surface of the water.

The lower part 72 is connected to the lower end of the upper part 71 and consists of a perforated tube 722 whose lower end is closed and a plurality of second through holes are formed on the side wall. The inside of the perforated tube 722 forms a second moving path 721 through which the cutting oil moves. This second moving path 721 is connected to the first moving path 713, so that the first moving path 713 The cutting oil that does not pass through the mesh network 714 moves along the second movement path 721 and flows through the second through hole along with the cutting oil into the storage tank 30. At this time, the second through hole is larger than the first through hole, allowing bubbles larger in size than the air bubbles passing through the first through hole to flow into the storage tank 30.

The air bubbles that pass through this second hole combine with larger-sized foreign substances, allowing the foreign substances to quickly move upward.

Fine foreign matter that floats to the surface of the water together with air bubbles can be introduced into the guide 63 and then into the foreign matter filtering device 20 through the suction pipe 40.

The foreign matter cleaning device 10 according to the present invention has a structure that allows selection of a cleaner mode and a skimmer mode, so that relatively large-sized foreign matter settled in the storage tank 30 or floating inside the storage tank 30 can be removed in the cleaner mode. It can be removed,

Relatively small-sized fine foreign substances that cannot be removed in the cleaner mode can be removed in the foreign matter filtering device 20 through the suction pipe 40 through the guide 63 in the skimmer mode, so that foreign substances of various sizes can be effectively removed.

In addition, the present invention utilizes the discharge pressure discharged by the pump 23 to discharge cutting oil through the bubble generating means 70 and at the same time creates air bubbles in the storage tank 30, so that fine foreign substances are separated from the air bubbles. By allowing them to combine and float to the surface, there is also the advantage of allowing fine foreign substances to be effectively removed.

The operator can continuously remove fine foreign substances while consuming less energy by finely adjusting the suction power through the suction power control unit 26 in skimmer mode, so that the storage tank 30 can contain cutting oil without contamination. There are also advantages to having it.

Although the technical idea of the present disclosure has been described through some embodiments and examples shown in the accompanying drawings, it does not depart from the technical idea and scope of the present disclosure that can be understood by those skilled in the art in the technical field to which the present disclosure belongs. It should be noted that various substitutions, modifications and changes can be made. Furthermore, such substitutions, modifications and alterations are intended to fall within the scope of the appended claims.

10...foreign matter cleaning device 20...foreign matter filtration device
21...main body 211...wheels
212...lid 213...inlet
214...outlet 22...filter part
221...tank 222...collection filter
23...pump 231...connector
24...controller 25...switch
26...Suction power control unit 30...Reservoir
40...suction pipe 50...discharge pipe
60...skimmer device 61...frame
611...adjusting screw 612...installation hole
613...First hole 62...Guide rod
621...stopper 63...guide
70...Bubble generating means 71...Upper side
711...through hole 712...inlet
713...1st mobile road 714...mesh net
72...Lower side 721...Second travel route
722...Other common

Claims (10)

A main body with a receiving space inside and an inlet through which cutting oil flows in and an outlet through which cutting fluid is discharged;
a pump disposed within the receiving space and allowing cutting oil to flow into the main body through an inlet and discharging the cutting oil to the outside through an outlet; and
A foreign matter filtering device disposed in the receiving space and provided with a filter unit for removing foreign matters from the cutting oil flowing in from the inlet;
A storage tank containing cutting oil,
A suction pipe, one end of which is connected to the inlet of the foreign matter filtering device and the other end disposed in the storage tank to guide cutting oil containing foreign materials to be supplied to the foreign matter filtering device;
A discharge pipe, one end of which is connected to the outlet and the other end of which is disposed within the storage tank, guides cutting oil from which foreign substances have been removed through a foreign matter filter to be supplied into the storage tank;
It includes a skimmer device for supplying foreign substances in the cutting oil floating on the water surface of the storage tank to the foreign matter filtering device through the suction pipe,
The skimmer device is,
A frame fixed to the storage tank,
A guide bar installed to move up and down with respect to the frame,
It is fixed to the guide rod and can move up and down with respect to the frame together with the guide rod. The upper part is open, and when the open upper part is placed below the water surface of the reservoir, foreign substances floating on the water surface are discharged through the edge of the open upper part along with the cutting oil. Includes a container-shaped guide that allows the flow to flow into the
The suction pipe is inserted into the container-shaped guide to suck in foreign substances introduced inside the guide, and the lower end of the guide rod protrudes toward the center of the container-shaped guide to fix the height of the suction pipe and the lower end of the suction pipe is contacted. A foreign matter cleaning device for removing foreign substances floating in cutting oil, characterized in that it is formed with a stopper that can be used. delete According to paragraph 1,
A foreign matter cleaning device for removing foreign substances floating in cutting oil, characterized in that the frame is provided with an installation hole into which the suction pipe is inserted. According to paragraph 3,
A foreign matter cleaning device for removing foreign substances floating in cutting oil, characterized in that the height of the suction pipe can be adjusted in the vertical direction while inserted into the installation hole. delete According to paragraph 1,
The foreign matter filtering device further includes a controller that controls pump operation,
The controller is,
A mode conversion switch capable of selecting one of a cleaner mode for removing foreign substances settled in the storage tank and a skimmer mode for removing foreign substances floating around the water surface in the storage tank. Foreign matter cleaning device. According to clause 6,
In the skimmer mode, the pump is a foreign matter cleaning device for removing foreign substances floating in the cutting oil, characterized in that the suction degree can be adjusted by the suction power adjuster. According to paragraph 1,
A foreign matter cleaning device for removing foreign substances floating in cutting fluid, characterized in that a bubble generating means is installed at the other end of the discharge pipe to provide bubbles in the storage tank along with the discharged cutting oil. According to clause 8,
The bubble generating means is,
An inlet path connected to the end of the discharge pipe and through which cutting fluid flows, a first path connected to the inlet path and a blocking portion disposed at the end of the inlet path that causes the cutting fluid to move by converting the movement path to the vertical direction, and It includes a second moving path that is connected to the first moving path and guides cutting oil in a direction perpendicular to the first moving path,
A foreign matter cleaning device for removing foreign substances floating in cutting oil, characterized in that the first moving path is installed with a mesh net having a plurality of first through holes for discharging the cutting oil moved through the discharge pipe to the outside. According to clause 9,
A perforated tube in which a plurality of second through holes are formed is provided around the second moving path, and the bubbles generated by passing through the second through holes are larger in size than the bubbles generated by passing through the mesh network. A foreign matter cleaning device that removes foreign substances floating inside.

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