KR102019684B1 - Method of reusing for cutting oil - Google Patents

Abstract

The present invention relates to a method of removing and reusing sludge contained in cutting oil and, more specifically, relates to a method of reusing cutting oil, wherein cutting oil containing sludge is collected in a stirring tank, and through a stirring step, the cutting oil is rotated to one side for the sludge not to be deposited. Therefore, the sludge is prevented from remaining in the stirring tank, and at the same time, the cutting oil collected in the stirring tank is sent to a cyclone filter to remove the sludge in the cutting oil. Oil containing in the cutting oil is separated in an oil removing step, and thermal deformation is prevented by temperature management of the cutting oil in a temperature management step to supply clean cutting oil to a machine tool, thereby improving surface roughness and a processing degree of a workpiece.

Description

Method of reusing for cutting oil}

The present invention relates to a method for removing and reusing sludge contained in cutting oil, and more particularly, collecting cutting oil containing sludge in a stirring tank and rotating the cutting oil to one side through a stirring step so that sludge does not precipitate. It prevents remaining in the tank and at the same time sends the cutting oil collected in the stirring tank to the cyclone filter to remove the sludge in the cutting oil, removes the oil in the cutting oil by the oil removal step, and controls the temperature of the cutting oil by the temperature control step. It is a reusing method of cutting oil which can improve the surface roughness and processing degree of the workpiece by supplying clean cutting oil to the machine tool by preventing thermal displacement.

In general, machine tools such as automatic lathes and machining centers use cutting tools such as drills and bites to cut the workpieces.These cutting tools smooth out the workpieces by spraying cutting oil while the workpieces are being processed. .

In other words, the coolant is used to prevent the build-up edge and prevent the wear of the cutting tool by smoothly discharging chips when cutting the workpiece by the tool, and to cool the workpiece and to increase the temperature. It prevents the degradation of dimensional accuracy by the help and facilitates the cutting action by helping the flow of the processed chip.

The cutting oil is mainly injected into the cutting tool by using the cutting oil discharge pipe formed in the machine tool itself, and thus the cutting oil discharged from the machine tool contains fine sludge which is hard to see with the naked eye together with the cutting chips of the visible size.

Cutting chips of a certain size can be removed with a chip conveyor installed on one side of the machine tool, but fine sludge is mixed with the cutting oil, so if the separate removal device is not used, the function of the cutting oil will be reduced. Fast oxidation reduces the service life.

As a conventional technique proposed to solve such a problem, there is a refrigerant supply device proposed in Japanese Patent Publication No. 6196409.

The patent has a substantially spherical shape in plan view, and the first and second coolant baths and the first and second coolant baths are disposed at end portions of the first and second coolant baths arranged side by side at a predetermined interval so that one end of the first coolant bath is a side wall. A cooling water tank formed at a substantially U-shape in plan view, the other end of which includes a communication portion for connecting the second coolant bath to the side wall and communicating the first coolant bath and the second coolant bath; The second coolant bath is provided with a supply pump for pumping the coolant to a predetermined part, and the coolant supplied to the predetermined part by the supply pump is refluxed to the first coolant bath and the first coolant bath is supplied. A refrigerant supply device configured to pass through the communicating portion into the second coolant tank, the refrigerant supply device comprising: at least one stirring pump for pumping the coolant into the coolant tank; A first stirring nozzle body disposed in the first coolant tank to discharge the coolant supplied from the agitating pump to assist the flow of the coolant toward the communication portion, and to be disposed in the second coolant tank to dispose the coolant. A coolant supply device has been proposed in which a coolant flowing from a pump and a coolant flowing from the communicating portion are provided with a second stirring nozzle body for assisting the flow. The sludge generated by the sludge may not be precipitated in the coolant tank, but the effect of the sludge (fine cutting chip) into the stop and discharge to the stop for the discharge of the sludge (fine cutting chip) may have a small effect of removing the sludge.

As another conventional technique, there is an apparatus for removing suspended matter and grindstone particles of a grinding machine cooling water proposed in Korean Utility Model Registration No. 20-0339170.

The patent discloses that the coolant 11 introduced into the settling tank 31 through the recovery line 8 sequentially overflows the first and second sedimentation tanks 40 and 41 and is discharged to the coolant tank 9. The grinding chip 12 deposited in the pre-charging tank 40 is contained in the collection bucket 42 which is moved in accordance with the driving of the chain 36 by the motor 39, and the sediment removal part collected by the chip box 7. 50; The nozzle pipe 22 and the discharge pump 15 are installed in the cooling water tank 9 so as to be floated by the float 17, and the center is formed by air injected through the injection nozzle 23 of the nozzle pipe 22. Float 10 collected by the float removal unit 51 is discharged through the discharge line 25 by the discharge pump 15; When the coolant 11 filled in the oil separation tank 27 through the discharge line 25 reaches the discharge reference line 28-1, a float separation unit through which the float 10 is discharged through the drain pipe 26 ( 52) has been proposed to remove suspended solids and grindstone particles of the grinding machine cooling water. In the case of relatively large grinding chips, they are settled in the lower part of the settling tank in a short time, but small grinding chips have a long time. Since the sedimentation to the lower part of the settling tank only passes, the time required for the removal of the grinding chip is inevitably increased, and thus it is not applicable to the continuous supply of cutting oil such as a machine tool.

Another prior art is a chip conveyor which is easy to remove cutting oil proposed in JP-A-10-2018-0077480.

The patent is a chip conveyor for transporting the chip generated in the machine tool to a predetermined collection position to freely drop into the chip box to collect the chip, extending from the chip discharge position of the machine tool to the collection position, Open conveyor frame; A conveyor belt provided inside the conveyor frame and transferring the chips to the collection position; And an air nozzle spaced apart in the longitudinal direction of the conveyor frame on the side of the conveyor frame, and spraying compressed air toward the upper surface of the conveyor belt. The cutting oil remaining on the upper surface of the conveyor belt includes: A chip conveyor has been proposed, which is blown and removed by compressed air. Although cutting oil can be removed from the cutting chip by compressed air, it is impossible to remove fine sludge in the removed cutting oil.

Japanese Patent Publication No. 6196409 (August 25, 2017 registration) Republic of Korea Utility Model Registration Publication No. 20-0339170 (January 24, 2004) Republic of Korea Patent Publication No. 10-2018-0077480 (published Jul. 9, 2018)

Accordingly, the present invention provides a method for removing and reusing sludge contained in the cutting oil, but more specifically, by collecting the cutting oil containing the sludge in the stirring tank and rotating the cutting oil to one side through the stirring step so that the sludge does not precipitate. By preventing the remaining oil in the stirring tank and sending the cutting oil collected in the stirring tank to the cyclone filter to remove the sludge in the cutting oil, separating the oil in the cutting oil by the oil removal step, and controlling the temperature of the cutting oil by the temperature control step. It is an object of the present invention to provide a method of reusing cutting oil which can improve the surface roughness and the degree of machining of the workpiece by supplying clean cutting oil to the machine tool by preventing thermal displacement.

In addition, the sludge removal step for removing sludge in the cutting oil is switched when not using the fluid pump installed for supplying the cutting oil to the cyclone filter by the cyclone pump and supplying the dirty cutting oil in the stirring tank to the machine tool. Another object of the present invention is to provide a method of reusing coolant, which improves the amount of coolant circulated by sending coolant in a stirring tank to a secondary cyclone filter using a valve.

In addition, the temperature control step for temperature management of the clean cutting oil is to lower or raise the temperature of the cutting oil using a heater pump oil cooler, the heater pump oil cooler is to put the coolant tube in the cutting oil in the stirring tank to cool the cutting oil and the inside of the coolant tube It is another object of the present invention to provide a method of reusing cutting oil which improves heat exchange efficiency and enables fine temperature control by performing temperature management by performing heat exchange between flowing refrigerants.

Recycling method of the coolant according to the present invention includes a method for reusing the cutting oil used in the machine tool, the cutting oil inflow step of removing chips from the cutting oil used in the machine tool and collecting in the stirring tank; A stirring step of stirring the cutting oil collected in the stirring tank; A sludge removal step of sending the stirred cutting oil to a cyclone filter to remove fine sludge; An oil removal step of removing oil from the cutting oil having passed through the cyclone filter; A reintroduction step of collecting the oil from which the oil has been removed into the clan tank; A temperature management step of adjusting the temperature of the cutting oil in the clean tank to a specific temperature; It is characterized in that consisting of; sending the cutting oil to the machine tool set to a specific temperature.

The method for reusing cutting oil according to the present invention provides a method for removing and reusing sludge contained in cutting oil, and more specifically, collecting sludge-containing cutting oil in a stirring tank and rotating the cutting oil to one side through a stirring step. Prevents sedimentation from remaining in the stirring tank and sends the cutting oil collected in the stirring tank to the cyclone filter to remove sludge in the cutting oil, and removes the oil in the cutting oil as an oil removal step. There is a remarkable effect of improving the surface roughness and processing accuracy of the workpiece by supplying clean cutting oil to the machine tool by preventing thermal displacement due to temperature control of the cutting oil.The sludge removal step for removing sludge in the cutting oil is a cyclone pump. Cutting towards the cyclone filter Effect of increasing the circulation of cutting oil by sending the cutting oil in the stirring tank to the auxiliary cyclone filter by using a switching valve when not using a fluid pump installed for supplying and removing dirty coolant in the stirring tank toward the machine tool. In the temperature control step for temperature control of the clean cutting oil, a temperature of the cutting oil is lowered or raised by using a heater pump oil cooler, and the heater pump oil cooler inserts a coolant tube into the cutting oil in the stirring tank to cut the coolant and the coolant inside. By performing heat management by performing heat exchange between the refrigerant flowing through the heat exchange efficiency has a significant effect capable of fine temperature control.

1 is an overall configuration diagram of a coolant composite coolant device according to the present invention
Figure 2 is a plan view of a coolant composite coolant device according to the present invention
3 and 4 is a partial configuration diagram of a coolant composite coolant device according to the present invention
5 is a perspective view of the cyclone pump and the bracket according to the present invention
Figure 6 is a cross-sectional view of the bracket according to the present invention
7 is a flowchart illustrating a method for reusing coolant according to the present invention.

The present invention relates to a method for removing and reusing sludge contained in cutting oil, and more particularly, collecting cutting oil containing sludge in a stirring tank and rotating the cutting oil to one side through a stirring step so that sludge does not precipitate. It prevents remaining in the tank and at the same time sends the cutting oil collected in the stirring tank to the cyclone filter to remove the sludge in the cutting oil, removes the oil in the cutting oil by the oil removal step, and controls the temperature of the cutting oil by the temperature control step. It is a reusing method of cutting oil which can improve the surface roughness and processing degree of the workpiece by supplying clean cutting oil to the machine tool by preventing thermal displacement.

First, a coolant composite coolant device capable of performing a method of reusing coolant according to the present invention will be described.

1 is an overall configuration diagram of a coolant composite coolant device according to the present invention, Figure 2 is a plan configuration diagram of a coolant composite coolant device according to the present invention, Figure 3 and 4 is a coolant composite coolant according to the present invention As a partial configuration diagram of the device, the coolant composite coolant device according to the present invention is a composite coolant device for removing and reusing sludge contained in cutting oil, comprising: a stirring tank (1) for collecting cutting oil containing cutting sludge, An agitator 10 installed at the center of the agitator tank 1 to rotate cutting oil collected in the agitator tank 1 in one direction, and a filter pipe 13 installed at one side of the agitator 10. Through the cyclone filter unit 20 and the cyclone filter unit 20 to remove the cutting sludge in the supplied cutting oil and the cutting oil supplied through the cutting oil is supplied to the cutting oil Oil-water separator 30 for separating the contained oil, a heater pump oil cooler 40 to manage the temperature of the clean sludge and the cutting sludge and oil is removed, and is installed on one side of the heater pump oil cooler 40 and cooled It is characterized by consisting of; supply unit 50 for sending the cutting oil to the machine tool.

First, the stirring tank 1 collects cutting oil containing cutting sludge, and removes cutting chips of a certain size or more from a chip conveyor installed on one side of a machine tool, and collects cutting oil containing fine sludge.

The stirring unit 10 is installed at the center of the stirring tank 1, and the stirring unit 10 rotates the cutting oil collected in the stirring tank 1 to one side, whereby the fine sludge is the stirring tank 1. Prevents sedimentation at the bottom of the

One side of the stirring tank (1) is provided with a cyclone filter unit 20 to filter the fine sludge in the cutting oil, a general cyclone method, that is, when the cutting oil is introduced into one side of the filter to rotate at a constant speed fine sludge The clean cutting oil dropped to the bottom of the filter and the sludge has been removed uses a cyclone filter 21 using a method of flowing out to the top of the filter.

In addition, one side of the stirring tank (1) is provided with an oil-water separator 30, the oil-water separator 30 is supplied to the cutting oil from the sludge is removed through the cyclone filter unit 20 included in the cutting oil The oil is separated, and the heater pump oil cooler 40 prevents thermal displacement by managing the temperature of the clean sludge from which the cutting sludge and the oil are removed, and then the coolant maintained at the required temperature is processed through the supply unit 50. Sent to the machine.

Here, the stirring unit 10 is a cyclone pump 11 for providing power to rotate the cutting oil contained in the stirring tank and the stirring to reflow the cutting oil introduced into the cyclone pump 11 into the stirring tank (1) A part of the cutting oil flowing into the cyclone pump 11 and the nozzle 14 installed at one end of the agitating pipe 12, the agitation pipe 12, and determining the discharge direction of the cutting oil is transferred to the cyclone filter 21. It consists of the pipe 13 for sending filters.

First, the cyclone pump 11 is a pump for generating the power to rotate the cutting oil in one direction by introducing the cutting oil gathered in the stirring tank 1 into the pump and discharged, one side of the cyclone pump 11 for stirring Pipe 12 is installed to send a portion of the cutting oil introduced into the cyclone pump 11 back to the stirring tank (1) so that the cutting oil is rotated while causing a vortex in the stirring tank (1).

In the illustrated embodiment, the agitation pipe 12 is installed at the discharge port side of the cyclone pump 11 so as to be directed to three places of the agitation tank 1, and a filter pipe 13 is installed at one side of the cyclone pump ( Some of the cutting oil introduced into 11) is re-introduced into the stirring tank 1 through the stirring pipe 12 and the other part is sent to the filter pipe 13 to filter the fine sludge by the cyclone filter 21. One end of the stirring pipe 12 is provided with a nozzle 14 to determine the discharge direction of the cutting oil.

The nozzle 14 is the cutting oil is circulated along the direction in which the nozzle 14 is installed, preferably, the nozzle 14 installed in the three stirring pipes 12 should be installed so that the cutting oil is rotated in one direction, In some cases, two or three discharge ports of the nozzle 14 may be provided so that fine sludge does not collect at a specific position.

In addition, the stirring tank (1) has a corner is treated with a curved portion (2) to reduce the friction against the rotation of the cutting oil, the bottom of the stirring tank (1) to collect the cutting sludge under the cyclone pump (11) It is inclined to gradually lower toward the center from the outskirts of.

That is, the curved portion (2) of the corner may reduce the friction against the rotation of the cutting oil to increase the rotational speed, in particular, because the bottom of the stirring tank (1) is inclined so as to gradually lower toward the center from the stirring tank (1) The sludge contained in the cutting oil rotated along the) is gradually gathered to the center, and thus the amount of sludge sent to the cyclone filter 21 is increased because the larger amount of sludge is included in the cutting oil entering the cyclone pump 11. It can be a lot.

In addition, the oil / water separator 30 uses the oil / water separator 31 and the oil skimmer 32 in duplicate, and the oil / water separator 31 passes the cyclone filter 21 to remove cutting sludge from the oil / water separator. The oil is introduced into the filter to filter the oil, and the oil skimmer 32 collects the cutting oil, which is primarily filtered through the oil / water separator 31, in the clean tank 41, and then the cutting oil has a predetermined flow rate or more. When the discharge oil is discharged to the discharge port, that is, when the amount of cutting oil gathered in the clean tank 41 exceeds a predetermined amount, the oil floating on the upper cutting oil due to the difference in specific gravity overflows toward the discharge port to filter the oil.

That is, the fine oil sludge filtered by the cyclone filter 21 is sent to the oil and water separator 31 through the discharge pipe 23 to separate the oil first and then collected in the clean tank 41, and the level of the cutting oil is gradually increased. If it continues to flow into the clean tank 41, the upper portion of the introduced cutting oil overflows, and since the oil content in the overflowing cutting oil is more due to the difference in specific gravity between the oil and the cutting oil, the separation of oil is easily doubled. Can be done.

The heater pump oil cooler 40 is a device for managing the temperature of the cutting oil gathered in the clean tank 41. If the temperature of the cutting oil is to be increased, the refrigerant of high temperature is passed through the refrigerant pipe 42 contained in the clean tank 41. In order to increase the temperature of the cutting oil by supplying the lowering temperature, on the contrary, to lower the temperature of the cutting oil, the low temperature coolant may be supplied to the coolant pipe 42 to lower the cutting oil temperature. This is to shorten the warm-up time when operating the machine tool at low temperature.

In addition, the supply unit 50 is configured to include one or more fluid pump 51 and the supply pump 53, the fluid pump 51 supplies the dirty cutting oil in the stirring tank toward the machine tool, the cutting oil toward the machine tool When the supply time is not supplied, the circulating amount of the cutting oil is increased by sending the cutting oil in the stirring tank 1 to the auxiliary cyclone filter 52 using a switching valve.

First, the supply pump 53 is a pump for sending clean cutting oil in the clean tank 41 toward the machine tool, and a plurality of fluid pumps 51 are provided around the cyclone pump 11. The dirty cutting oil in the stirring tank, that is, the cutting oil without fine sludge is sent to the machine tool. In the case of the machine tool, the clean cutting oil with fine sludge filtered must be supplied to the machining machine. The cutting oil used for cleaning the filter inside the conveyor, cleaning the chip attached to the slide cover, or cleaning the bed for moving the tool bar may be used because the cutting oil containing fine sludge may be used. When the coolant in the agitating tank is not sent to the machine tool using the fluid pumps 51 used as That is, when not in use, the sludge is removed by the cyclone pump 11 and the cyclone filter 21 by sending the cutting oil in the stirring tank 1 toward the auxiliary cyclone filter 52 using the fluid pump 51. Supplementally, the sludge removal can be performed in a faster time by performing the sludge removal together with the fluid pump 51 and the auxiliary cyclone filter 52.

In other words, in addition to the amount of cutting oil circulated by the cyclone pump 11, the amount of cutting oil circulated by circulating the cutting oil by the fluid pump 51 increases, thereby increasing the amount of sludge removed per unit time.

The supplementary sludge removal by the fluid pump 51 includes an auxiliary cyclone filter 52 for each fluid pump, in addition to the cyclone filter 21, and separate pipes between the fluid pump 51 and the auxiliary cyclone filter 52. It can be solved by providing, it is possible to select when to send the cutting oil to the machine tool and the auxiliary cyclone filter 52 by using a switching valve.

Here, the cyclone filter 21 and the secondary cyclone filter 52 is installed to detach the dust can 22 to collect the sludge under the cyclone filter when a large amount of sludge is collected in the dust can 22. It can be removed from the fields 21 and 52 to clean the interior and reuse it.

5 is a perspective view of the cyclone pump and the bracket according to the present invention, Figure 6 is a cross-sectional configuration of the bracket according to the present invention, the lower portion of the cyclone pump 11 is provided with a cylindrical bracket 60, Through holes 61 are formed in the circumferential surface of the bracket 60 to increase the absorption of the oil floating on the cutting oil.

That is, the bracket 60 increases the removal efficiency of the sludge and oil by introducing only the cutting oil circulated at a specific position among the cutting oil flowing into the cyclone pump 11, in the case of the cutting oil flowing in the stirring tank 1 from below Since the content of is high, the lower cutting oil is introduced, and the upper cutting oil has a high oil content, so only the lower and upper cutting oils are introduced except the middle layer, thereby further improving sludge and oil removal efficiency.

7 is a flow chart of a method for reusing coolant according to the present invention. The method for reusing coolant according to the present invention is a method for reusing coolant used in a machine tool. The chip is removed from the coolant used in the machine tool and collected in a stirring tank. Cutting oil inflow step (S 10); A stirring step (S 20) of stirring the cutting oil collected in the stirring tank; Sludge removal step (S 30) to send the stirred cutting oil to the cyclone filter 21 to remove the fine sludge; Oil removal step (S 40) for removing oil from the cutting oil passed through the cyclone filter 21; Reflowing step (S 50) for collecting the oil is removed cutting oil into the clan tank (41); A temperature management step of adjusting the temperature of the cutting oil in the clean tank 41 to a specific temperature (S 60); It is characterized by consisting of a sending step (S 70) for sending the cutting oil adjusted to a specific temperature toward the machine tool.

First, the cutting oil inflow step (S 10) is a step of removing chips of a relatively large size from the cutting oil used when cutting the workpiece in a machine tool and collecting cutting oil containing fine sludge in the stirring tank (1). In addition, after removing the cutting chips of a certain size from the chip conveyor installed on one side of the machine tool, the cutting oil containing fine sludge is collected.

When a sufficient amount of cutting oil is collected in the stirring tank (1), by rotating the cutting oil to one side through the stirring step (S 20) to prevent the fine sludge is deposited, the stirring tank (1) during the stirring step (S 20) Sludge removal step (S 30) to send the cutting oil in the) to the cyclone filter 21 to remove the fine sludge is made at the same time.

That is, the process of stirring in the stirring step (S 20) is introduced by the cyclone pump 11 in the dirty cutting oil in the stirring tank (1) partly re-introduced into the stirring tank (1) through the stirring pipe (12) The cutting oil in the stirring tank 1 is rotated to one side, and the rest is sent to the cyclone filter 21 through the filter pipe 13 to remove sludge.

The cutting oil in which the fine sludge is removed by the cyclone filter 21 removes the oil through the oil removal step S 40, and the clean oil in which the oil is removed, the clean tank 41 through the reflow step S 50. Gathered into me.

The coolant collected in the clean tank 41 is maintained at a specific temperature through the temperature management step (S 60), and then is sent back to the machine tool through the sending step (S 70) to reuse the processing of the workpiece.

In addition, in the reflowing step (S 50), the cutting oil filtered with the primary oil is collected into the clean tank 41 using the oil / water separator 31, and when the cutting oil collected in the clean tank 41 reaches a predetermined amount or more, the oil skimmer is overflowed. By sending it to (32), the oil is filtered off second.

That is, the oil removal step (S 40) according to the present invention is carried out over the first and second, the removal of the primary oil is carried out using the oil and water separator 31, the removal of the secondary oil oil skimmer ( 32).

In other words, the cutting oil passing through the cyclone filter 21 enters the oil / water separator 31 through the discharge pipe 23 and is removed by the filter installed in the oil / water separator 31 and then sent to the clean tank 41. When the coolant collected in the clean tank 41 is above a certain flow rate, the discharged oil is discharged to the discharge port. That is, when the coolant collected in the clean tank 41 exceeds the predetermined amount, the oil floating on the upper part of the coolant overflows due to the difference in specific gravity. (Oil flow) is sent to the oil skimmer (32) to filter the oil secondary, and the oil is sent to the oil skimmer (32) to remove the coolant to be sent back to the clean tank (41) or stirring tank (1) do.

In addition, the sludge removing step (S 30) is a fluid pump installed for the purpose of supplying the cutting oil to the cyclone filter 21 by the cyclone pump 11 to remove the sludge, and supply the dirty cutting oil in the stirring tank toward the machine tool. When 51 is not used, the amount of circulating cutting oil is increased by sending the cutting oil in the stirring tank 1 to the auxiliary cyclone filter 52 using a switching valve.

As described above, when the dirty cutting oil collected in the agitating tank 1 may be sent to the machine tool for use, that is, the chip inside the drum conveyor in addition to the cutting of the workpiece, or the chip attached to the slide cover, etc. The cutting oil used for cleaning the bed for cleaning the tool bar or moving the tool bar may use cutting oil containing fine sludge. Therefore, the cutting oil in the stirring tank may be used by using the fluid pumps 51 used for this purpose. When not sent to the machine tool, that is, when not used, the cutting oil in the stirring tank 1 is sent to the auxiliary cyclone filter 52 by the fluid pump 51 to the cyclone pump 11 and the cyclone filter 21. The sludge removal is performed by the fluid pump 51 and the auxiliary cyclone filter 52 while supplementing the sludge removal. The sludge removal can be performed in a short period of time than by row.

In addition, the temperature management step (S 60) using the heater pump oil cooler 40 lowers or raises the temperature of the cutting oil, the heater pump oil cooler 40 is a coolant pipe (C) in the cutting oil in the clean tank 41 ( 42) to insert a heat exchange between the cutting oil and the refrigerant flowing inside the refrigerant pipe 42 to perform temperature management.

That is, the coolant pipe 42 may be installed in the clean tank to supply the coolant having a relatively high temperature or the coolant at a lower temperature than the coolant through the coolant pipe 42 to manage the temperature of the cutting oil, thereby preventing the thermal displacement of the cutting oil. have.

In addition, a cylindrical bracket 60 is installed below the cyclone pump 11 and the fluid pump 51, and a through hole 61 is formed on the circumferential surface of the bracket 60 to float on the cutting oil. Will increase the absorption.

Cutting oil inlet step (S 10), stirring step (S 20), sludge removal step (S 30), oil removal step (S 40), reflow step (S 50), temperature management step (S 60) in the above-described embodiment ) And delivery step (S 70) is a time-series step showing the circulating process of the cutting oil, but in practice the implementation of the method according to the present invention may be carried out in a plurality of steps in the same or in reverse order or in succession.

After all, the method for reusing cutting oil according to the present invention provides a method for removing and reusing sludge contained in cutting oil, and more specifically, collecting cutting oil containing sludge in a stirring tank and rotating the cutting oil to one side through a stirring step. This prevents sludge from settling and prevents it from remaining in the agitation tank and sends cutting oil collected in the agitation tank to a cyclone filter to remove sludge in the cutting oil, and removes oil in the cutting oil by removing the oil. As a step, there is a remarkable effect of improving the surface roughness and processing accuracy of the workpiece by supplying clean cutting oil to the machine tool by preventing thermal displacement due to temperature control of the cutting oil, and removing the sludge in the cutting oil To cyclone filter by cyclone pump When not using the fluid pump installed to supply and remove the cutting oil and supply the dirty cutting oil in the stirring tank toward the machine tool, the cutting oil in the stirring tank is sent to the auxiliary cyclone filter by using a switching valve to increase the circulation of the cutting oil. The temperature control step for temperature control of the clean cutting oil is performed by using a heater pump oil cooler to lower or raise the temperature of the cutting oil, wherein the heater pump oil cooler inserts a coolant tube into the cutting oil in the stirring tank, thereby cutting the coolant and the coolant tube. By performing heat management by performing heat exchange between the refrigerant flowing inside, there is a remarkable effect of increasing heat exchange efficiency and enabling fine temperature control.

1. Stirring tank 2. Curved part
10; Agitator
11. Cyclone Pump 12. Stirring Pipe
13. Filter piping 14. Nozzle
20; Cyclone Filter
21. Cyclone Filter 22. Dust Can
23. Outlet pipe
30; Oil-water separator
31.Oil Separator 32.Oil Skimmer
40; Heater Pump Oil Cooler
41.Clean Tank 42.Refrigerant Pipe
50; Supply department
51. Fluid pump 52. Auxiliary cyclone filter
53. Supply Pump
60. Bracket 61. Through Hole
S 10; Cutting oil inflow step S 20; Stirring Step
S 30; Sludge removal step S 40; Oil removal step
S 50; Reflow step S 60; Temperature management stage
S 70; Transmission stage

Claims (6)

In a method for reusing coolant used in a machine tool,
A cutting oil inflow step (S 10) of removing chips from the cutting oil used in the machine tool and collecting the chips in the stirring tank; A stirring step (S 20) of stirring the cutting oil collected in the stirring tank; Sludge removal step (S 30) to send the stirred cutting oil to the cyclone filter 21 to remove the fine sludge; Oil removal step (S 40) for removing oil from the cutting oil passed through the cyclone filter 21; Reflowing step (S 50) for collecting the oil is removed cutting oil into the clan tank (41); A temperature management step of adjusting the temperature of the cutting oil in the clean tank 41 to a specific temperature (S 60); Conveying step (S 70) for sending the cutting oil adjusted to a specific temperature toward the machine tool,
In the stirring step (S 20), the process of stirring the dirty cutting oil in the stirring tank (1) by the cyclone pump (11) and the part is re-introduced into the stirring tank (1) through the stirring pipe (12) and stirred The cutting oil in the tank 1 is rotated to one side, and the rest is sent to the cyclone filter 21 through the filter pipe 13 to remove sludge,
The sludge removing step (S 30) is a fluid pump (51) installed for the purpose of supplying the cutting oil to the cyclone filter 21 by the cyclone pump 11 to remove the sludge, and supply the dirty cutting oil in the stirring tank toward the machine tool. When not used, the cutting oil in the agitation tank 1 is sent to the auxiliary cyclone filter 52 using a switching valve to increase the circulation of the cutting oil and to remove sludge by the fluid pump 51 and the auxiliary cyclone filter 52. By doing so, sludge removal can be performed faster.
The temperature management step (S 60) is to lower or raise the temperature of the cutting oil using the heater pump oil cooler 40, the heater pump oil cooler 40 is the refrigerant pipe 42 in the cutting oil in the clean tank 41 Heat exchange between the cutting oil and the refrigerant flowing inside the refrigerant pipe 42 to perform temperature management,
Cylindrical brackets 60 are provided below the cyclone pump 11 and the fluid pump 51, and through holes 61 are formed on the circumferential surface of the bracket 60 to absorb the oil floating on the cutting oil. How to reuse coolant, characterized by increasing the
delete The method of claim 1,
In the reflowing step (S 50), the cutting oil in which the primary oil is filtered by the oil / water separator 31 is collected into the clean tank 41, and when the cutting oil collected in the clean tank 41 becomes more than a predetermined amount, the oil skimmer 32 A method of reusing coolant, characterized by filtering oil secondly by sending it to the
delete delete delete

Images