JP2012086332A - Machining oil separation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining oil separation system not required to arrange separately a pump device and a detector in order to prevent an overflow in a separation tank.SOLUTION: This machining oil separation system includes a primary separation tank 1 for storing a recovered machining oil and primarily separating the same into a water-soluble machining oil WO and a contaminated machining oil, a secondary separation tank 2 for storing the contaminated machining oil BO and secondarily separating the same into a water-insoluble machining oil NO and a water-soluble machining oil, the first pump device 3 for sucking the primarily separated contaminated machining oil, to make the same flow into the secondary separation tank, the second pump device 5 for sucking the secondarily separated water-insoluble machining oil, to be supplied to an object to be machined, and a drainage pipe line 7. The flow rate of the first pump device is set equal to the flow rate of the second pump device or more, the liquid level of the secondary separation tank is brought into a position higher than that of the primary separation tank, and the drainage pipe line is constituted and arranged to make the water-soluble machining oil flow into the primary separation tank, in accompaniment to driving of each pump device, and the flow-in amount of the water-soluble machining oil is set to be flow rate differences of the respective pump devices.

Description

  The present invention selectively or simultaneously supplies a water-insoluble processing oil and a water-soluble processing oil to a workpiece processed by a machine tool, collects each processing oil from the machine tool, and uses the recovered processing oil. The present invention relates to a processing oil separation system that primarily separates mixed processing oil and water-soluble processing oil and further separates mixed processing oil into water-insoluble processing oil and water-soluble processing oil.

  Generally, in a machine tool, a workpiece is processed while supplying water-insoluble processing oil to the workpiece, or a workpiece is processed while supplying water-soluble processing oil to the workpiece. . The water-insoluble processing oil or the water-soluble processing oil supplied to the workpiece is collected from the machine tool and supplied again to the workpiece.

  In recent years, machine tools that process a workpiece while selectively or simultaneously supplying a water-insoluble processing oil and a water-soluble processing oil to the workpiece have been developed in machine tools. The water-insoluble processing oil and water-soluble processing oil supplied to the workpiece are collected by a processing oil separator, separated into water-insoluble processing oil and water-soluble processing oil, and supplied again to the workpiece. The

As a processing oil separation device, the technique disclosed in Patent Document 1 stores a water-insoluble cutting oil and a water-soluble cutting oil recovered from a processing machine, and a recovery tank that separates the water-soluble cutting oil and a mixed cutting oil into a water-soluble cutting oil; An oil storage tank that stores mixed processing oil and separates it into water-soluble processing oil and water-insoluble processing oil is disclosed. The mixed cutting oil is a cutting oil containing some water-soluble cutting oil in the water-insoluble cutting oil.
The mixed processing oil separated in the recovery tank flows into the oil storage tank by the pump device and the first oil pipe, and the water-insoluble cutting oil separated in the oil storage tank is supplied by the pump apparatus and the second oil pipe. It is supplied again to the workpiece of the processing machine.

  In the technique disclosed in Patent Document 1, the water-soluble cutting oil separated in the oil storage tank is caused to flow into the recovery tank by the pump device and the first water pipe. And the water-soluble cutting oil of an oil storage tank is attracted | sucked with a pump apparatus, and the overflow of an oil storage tank is prevented by making it flow in in a collection tank.

However, in the technique disclosed in Patent Document 1, it is necessary to dispose a pump device in order to prevent the oil storage tank from overflowing, and there is also a detector for controlling the suction / discharge drive of this pump device. Necessary.
Therefore, the technique disclosed in Patent Document 1 has a problem in that the manufacturing cost of the processing oil separation device increases.

Japanese Patent Laid-Open No. 11-77483

  The present invention has been made in view of the above problems, and in order to prevent the overflow of the separation tank, it is not necessary to separately provide a pump device and a detector. Provided is a processing oil separation system that can be separated into a water-soluble processing oil and a water-soluble processing oil.

  According to a first aspect of the present invention, a water-insoluble processing oil and a water-soluble processing oil are selectively or simultaneously supplied to a workpiece to be processed by a machine tool, and each processing oil is recovered from the machine tool. A processing oil separation system for separating the recovered processing oil into a water-insoluble processing oil and a water-soluble processing oil based on a difference in specific gravity, the recovered processing oil being stored, the water-soluble processing oil, A primary separation tank for primary separation into mixed processing oil mixed with processing oil, and a secondary separation tank for storing the primary separated mixed processing oil and performing secondary separation into water-insoluble processing oil and water-soluble processing oil; A first pump device for sucking the primary separated mixed processing oil from the primary separation tank and flowing it into the secondary separation tank; and a water-insoluble water that has been secondarily separated from the secondary separation tank Sucking the processing oil and supplying it to the workpiece A second pump device, and a drain line disposed in the primary separation tank and in the water-soluble processing oil of the secondary separation tank, each of which is disposed to be open, and mixed in the first pump device The flow rate of the processing oil is set to be equal to or higher than the flow rate of the water-insoluble processing oil of the second pump device, and the liquid level of the secondary separation tank is higher than the liquid level of the primary separation tank, The drain pipe causes the water-soluble processing oil to flow into the primary separation tank from the secondary separation tank as the pump devices are driven, and the amount of the water-soluble processing oil flows into the primary separation tank. The present invention relates to a processing oil separation system that is configured and arranged to have a flow rate difference of a pump device.

  According to a second aspect of the present invention, the drain pipe is continuous with the first pipe extending from the water-soluble processing oil of the secondary separation tank to the liquid level, and the first pipe. A first conduit extending outside the secondary separation tank along the liquid surface, a third conduit opening into the primary separation tank continuously to the second conduit, The present invention relates to a processing oil separation system comprising an adjustment hole communicating with outside air in a second pipe.

  A third aspect of the present invention includes a third pump device that sucks the water-soluble processing oil from the primary separation tank and supplies the water-soluble processing oil to the workpiece. It relates to the processing oil separation system of description.

  A fourth aspect of the present invention includes a temperature controller that adjusts a temperature of the water-soluble processing oil that flows out from the primary separation tank, and the water-soluble processing oil that has been temperature-controlled by the temperature controller includes: The processing oil separation system according to any one of claims 1 to 3, wherein the processing oil separation system is introduced into a primary separation tank and mixed into the recovered processing oil.

According to the first aspect of the present invention, the drain pipe is connected to the primary separation tank from the secondary separation tank so that the water-soluble processing oil of the difference in flow rate of each pump device is driven by the driving of the first and second pump devices. Since it flows in, the liquid level of a secondary separation tank can be maintained at a fixed height.
Therefore, in order to prevent the overflow of the secondary separation tank, a pump device and a detector are not required separately. Moreover, since a pump apparatus and a detector are not required, the manufacturing cost of a processing oil separation system can be reduced.

  According to the second aspect of the present invention, by utilizing the siphon effect generated in the drain pipe, the water-soluble processing oil having a difference in flow rate between the first and second pump devices is transferred from the secondary separation tank into the primary separation tank. In addition, since the liquid level of the secondary separation tank can be maintained at a constant level, there is no need to separately provide a pump device, a detector, or the like in order to prevent overflow of the secondary separation tank.

  According to the third aspect of the present invention, since the third pump device sucks the primarily separated water-soluble processing oil and supplies it to the workpiece, the first-separated water-soluble aqueous solution is reused. Can be supplied to the workpiece.

  According to the fourth aspect of the present invention, the temperature of the water-insoluble processing oil in the recovered processing oil can be efficiently controlled by mixing the temperature-adjusted water-soluble processing oil into the recovered processing oil and stirring it. .

It is a front view which shows the processing oil separation system which concerns on this invention. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is an enlarged view showing a primary separation tank and a machine tool of a processing oil separation system according to the present invention. It is CC arrow line view of FIG. It is an enlarged view which shows the structure of the 1st pump apparatus of the processing oil separation system which concerns on this invention, and a 3rd pump apparatus. It is an enlarged view which shows the structure of the drain line of the processing oil separation system which concerns on this invention. It is a principal part front view which shows other embodiment of the processing oil separation system which concerns on this invention.

  A processing oil separation system according to the present invention will be described with reference to FIGS. 1 to 8.

1 to 7, the processing oil separation system (X1) is configured to apply a water-insoluble processing oil (NO) and a water-soluble processing oil (WO) to a workpiece (Z) to be processed by a machine tool (Y). Selectively or simultaneously.
The processing oil separation system (X1) collects the processing oil (NO) and (WO) from the machine tool (Y), and the recovered processing oil (KO) is mixed with the water-soluble processing oil (WO) and the processing oil. Primary separation into (BO), and further, mixed processing oil (BO) is secondarily separated into water-insoluble processing oil (NO) and water-soluble processing oil (WO).
Furthermore, the processing oil separation system (X1) supplies the water-soluble processing oil (WO) subjected to primary separation and the water-insoluble processing oil (NO) subjected to secondary separation to the workpiece (Z) again.
The machine tool (Y) is a lathe, a milling machine, an NC lathe (numerically controlled lathe), a machining center (numerically controlled milling machine), a grinder, an NC grinder (numerically controlled grinder), etc. A machining center that cuts the workpiece (Z) by numerically controlling the movement of a cutting tool such as an end mill is illustrated. Moreover, the to-be-processed body (Z) is formed with materials, such as a metal, wood, or resin.

  The water-insoluble processing oil (NO) is a liquid processing oil having a specific gravity smaller than that of the water-soluble processing oil (WO), and has excellent lubricity. Further, the water-soluble processing oil (WO) is a liquid processing oil having a specific gravity greater than that of the water-insoluble processing oil (NO), and has excellent cooling properties. Furthermore, the recovered processing oil (KO) is a processing oil in which water-insoluble processing oil (NO) and water-soluble processing oil (WO) are turbid.

  Hereinafter, the specific configuration of the processing oil separation system (X1) and the recovery / separation operation of the processing oil separation system (X1) will be described in this order.

<Specific configuration of processing oil separation system (X1)>
First, a specific configuration of the processing oil separation system (X1) will be described with reference to FIGS.

  1 to 7, the processing oil separation system (X1) includes a primary separation tank (1), a secondary separation tank (2), a first pump device (3), a second pump device (5), and a third pump. A device (6) and a drain line (7) are provided as main components. The processing oil separation system (X1) also includes various pipes (31), (32), and (35).

1 to 4, the primary separation tank (1) stores recovered processing oil (KO) and primarily separates it into water-soluble processing oil (WO) and mixed processing oil (BO).
The mixed processing oil (BO) that is primarily separated is a processing oil in which a water-insoluble processing oil (NO) and a water-soluble processing oil (WO) are mixed, and the weight content A ( %), A processing oil having a weight content B [B = 100−A] (%) of the water-soluble processing oil (WO). The mixed processing oil (BO) is primarily separated so that the weight content A (%)> the weight content B (%).
Moreover, the water-soluble processing oil (WO) by which primary separation was carried out is a processing oil containing water-insoluble processing oil (NO) with a weight content of about 0 to 5 (%).

  The primary separation tank (1) has a storage space (8) for storing the recovered processing oil (KO), and is formed in a rectangular parallelepiped that seals the storage space (8). The primary separation tank (1) is located in the lower side of the workpiece (Z) and is installed in the machine tool (Y).

Moreover, as shown in FIGS. 1 to 4, the primary separation tank (1) includes a plurality of partition plates (9A) to (9D) in the storage space (8).
The plurality of partition plates (9A) to (9D) are sequentially arranged at intervals in the front-rear direction of the primary separation tank (1), and the upper wall plate (1A) and the bottom wall plate (1B) of the primary separation tank (1). ) Is installed.
These partition plates (9A) and (9C) are attached to the right wall plate (1C) of the primary separation tank (1) as shown in FIGS. A gap is formed between the left wall plate (1D) of the separation tank (1). On the other hand, each partition plate (9B), (9D) is attached to the left wall plate (1D) and extends to the right in the left-right direction to form a gap in the right wall plate (1C).
The partition plate (9A) partitions the recovery space (10) between the front wall plate (1E) of the primary separation tank (1), and the partition plate (9D) is located behind the primary separation tank (1). An outflow space (11) is defined between the wall plates (1F).
The plurality of partition plates (9A) to (9D) configured as described above partition the storage space (8) of the primary separation tank (1) and meander the recovery processing oil (KO) in the left-right direction while collecting the recovery space ( A primary separation channel (12) is formed to flow from 10) to the outflow space (11).

  Further, as shown in FIGS. 1, 3 and 4, the primary separation tank (1) has a recovery port (14), and this recovery port (14) opens into the recovery space (10). Yes. The collection port (14) is connected to the collection channel (15). This recovery channel (15) is installed between the workpiece (Z) of the machine tool (Y) and the primary separation tank (1), and each of the processing oils (NO) flowing down from the workpiece (Z) ( WO) is received and flows into the recovery space (10) of the primary separation tank (1) from the recovery port (14).

  In the primary separation tank (1) having the above-described configuration, the recovered processing oil (KO) flows out of the recovery space (10) from the recovery space (10) while meandering the primary separation channel (12) in the left-right direction, as shown in FIG. 11). This recovered processing oil (KO) is a water-soluble processing oil (WO) and mixed processing oil based on the specific gravity difference between each processing oil (NO) and (WO) in the course of flowing through the primary separation channel (12). Primary separation into (BO). As shown in FIG. 1, the mixed processing oil (BO) is separated into the upper layer of the storage space (8), and the water-soluble processing oil (WO) is separated into the lower layer of the storage space (8). .

In FIG. 1, FIG. 5 and FIG. 7, the secondary separation tank (2) stores the mixed processing oil (BO) subjected to the primary separation, so that the water-insoluble processing oil (NO) and the water-soluble processing oil (WO) are stored. Secondary separation.
The water-insoluble processing oil (NO) subjected to secondary separation is a processing oil containing a water-soluble processing oil (WO) having a weight content of about 0 to 5%.

  The secondary separation tank (2) has a storage space (21) for storing mixed processing oil (BO), and is formed in a rectangular parallelepiped that seals the storage space (21). Further, the liquid level (a) of the processing oil (NO) and (BO) in the secondary separation tank (2) is the same as the liquid level (b) of the processing oil (KO) and (BO) in the primary separation tank (1). ) It is in a higher position. This secondary separation tank (2) is installed in the machine tool (Y).

The secondary separation tank (2) includes a plurality of partition plates (22A) to (22C) in the storage space (21) as shown in FIGS.
The partition plate (22A) divides the outflow space (23) between the front wall plate (2E) of the secondary separation tank (2), and the water-soluble processing oil (NO) and water-solubilized water that has been secondarily separated. It is immersed in processing oil (WO). The partition plate (22A) is attached to the left and right walls (2C) and (2D) of the secondary separation tank (2).
The partition plates (22B) and (22C) are arranged vertically with a gap therebetween, and partition the inflow space (24) between the rear wall plates (2F) of the secondary separation tank (2). ing. These partition plates (22B) and (22C) are attached to the left and right wall plates (2C) and (2D), respectively, and the partition plate (22B) is disposed with a gap from the bottom wall plate (2B). ing.
Each of the partition plates (22A) to (22C) having the above-described structure partitions the storage space (21) of the secondary separation tank (2) and causes the mixed processing oil (BO) to meander in the vertical direction while flowing in the inflow space. A secondary separation channel (25) is formed to flow from (24) to the outflow space (23).

The secondary separation tank (2) is connected to the first supply line (31) and the connection line (32) as shown in FIGS.
The first supply pipe (31) is disposed between the secondary separation tank (2) and the workpiece (Z). One end of the first supply pipe (31) opens into the outflow space (23) of the secondary separation tank (2) and is immersed in the water-insoluble processing oil (NO). Further, the other end side of the first supply pipe (31) is branched into a plurality of nozzle pipes (31A) as shown in FIGS. The plurality of nozzle tubes (31A) are opposed to the workpiece (Z). Each nozzle pipe (31A) is provided with a flow rate adjusting valve (33).
Further, as shown in FIG. 1, the communication pipe (32) is disposed between the primary separation tank (1) and the secondary separation tank (2). One end side of the connecting pipe (32) is opened in the inflow space (24) of the secondary separation tank (2), and the other end side of the connecting pipe (32) is the first pump device (3). It is connected to the.

  In the secondary separation tank (2) configured as described above, the mixed processing oil (BO) flows from the inflow space (24) to the outflow space (23) while meandering along the secondary separation path (25) in the vertical direction. The This mixed processing oil (BO) is in the process of flowing through the secondary separation path (25), based on the difference in specific gravity of each processing oil (NO), (WO) and water-insoluble processing oil (NO). Secondary separation into processing oil (WO). As shown in FIG. 1, the water-insoluble processing oil (NO) is separated into the upper layer of the storage space (21), and the water-soluble processing oil (WO) is separated into the lower layer of the storage space (21). Is done.

1 to 3 and 6, the first pump device (3) is installed on the upper wall plate (1A) of the primary separation tank (1), and the suction side (3A) is mixed into the outflow space (11). It is immersed in oil (BO). Moreover, the 1st pump apparatus (3) is connected to the other end side of a connection pipe line (32).
The first pump device (3) is connected to a control device (not shown) and is driven for suction / discharge based on a drive command of the control device.
The first pump device (3) having the above configuration sucks the mixed processing oil (BO) primarily separated from the outflow space (11) of the primary separation tank (1) based on the drive command of the control device. Then, it flows into the inflow space (24) of the secondary separation tank (2) through the communication pipe (32).

In FIG. 1, the 2nd pump apparatus (5) is arrange | positioned in the 1st supply pipe line (31).
The second pump device (5) is connected to the control device (not shown), and is driven for suction / discharge based on a drive command of the control device.
The second pump device (5) having the above-described configuration is a water-insoluble processing oil (NO) secondarily separated from the outflow space (23) of the secondary separation tank (2) based on the drive command of the control device. Is supplied to the workpiece (Z) through the first supply pipe (31), the flow rate adjusting valve (33) and the plurality of nozzle pipes (31A).

Further, the flow rate (P1) of the mixed processing oil (BO) of the first pump device (3) is set to be equal to or higher than the flow rate (P2) of the water-insoluble processing oil (NO) of the second pump device (5). .
Specifically, the flow rate (P1) of the first pump device (3) is
P1 ≧ P2 + [P1 × weight content B (%)]
P1 ≧ P2 / [1-weight content B (%)]
Set to The weight content B (%) is the weight content of the water-soluble processing oil (WO) contained in the mixed processing oil (BO) that has been primarily separated.

1 to 3 and 6, the third pump device (6) is arranged on the upper wall plate (1A) of the primary separation tank (1), aligned with the first pump device (3) in the left-right direction. Has been.
The third pump device (6) is connected to the control device (not shown) and is driven for suction / discharge based on the drive command of the control device.
Further, as shown in FIG. 6, the suction side (6A) of the third pump device (6) is covered with a cylindrical member (41), and the water solubility of the outflow space (11) is passed through this cylindrical member (41). It is immersed in processing oil (WO).

Moreover, the 3rd pump apparatus (6) is connected to the 2nd supply pipe line (35), as shown in FIG.1 and FIG.3.
The second supply pipe (35) is disposed between the primary separation tank (1) and the workpiece (Z). One end of the second supply pipe (35) is connected to the third pump device (6), and the other end of the second supply pipe (35) is branched into a plurality of nozzle pipes (35A). ing. The plurality of nozzle pipes (35A) are opposed to the workpiece (Z) and are arranged outside the nozzle pipes (31A) of the first supply pipe line (31).
The third pump device (6) having the above configuration sucks the water-soluble processing oil (WO) primarily separated from the outflow space (11) of the primary separation tank (1) based on the drive command of the control device. Then, the workpiece is supplied to the workpiece (Z) through the second supply pipe (35) and the plurality of nozzle pipes (35A).

1 and 7, the drain pipe (7) allows the water-soluble processing oil (WO) secondarily separated from the secondary separation tank (2) to flow into the primary separation tank (1). The flow amount of the water-soluble processing oil (WO) is configured and arranged so as to be the flow rate difference (P1−P2) between the first and second pump devices (3) and (5).
The drain pipe (7) is disposed between the outflow space (23) of the secondary separation tank (2) and the recovery space (10) of the primary separation tank (1), and the first to third pipes. Paths (7A) to (7C) and adjustment holes (7D) are provided.

  One end side of the first pipe line (7A) is opened and immersed in the water-soluble processing oil (WO) in the outflow space (23). The first pipe (7A) extends from the water-soluble processing oil (WO) in the lower layer to the liquid level (a) of the water-insoluble processing oil (NO) in the upper layer.

One end of the second pipe (7B) is continuous with the other end of the first pipe (7A), and the second pipe (7B) is the liquid level (a) of the secondary separation tank (2). Along the outer side of the secondary separation tank (2).
That is, the second pipe (7B) is arranged so that the pipe axis (CL) coincides with the liquid level (a) of the secondary separation tank (2).
As shown in FIGS. 1 and 7, the second pipe (7B) is disposed at a position higher than the liquid level (b) of the processing oil (KO) and (BO) of the primary separation tank (1). Moreover, a height (H) is provided between the bottom wall plate (2B) of the secondary separation tank (2) and the pipe line axis (CL).

  One end side of the third pipe line (7C) is continued to the other end side of the second pipe line (7B), and the other end side of the third pipe line (7C) is recovered from the primary separation tank (1). It opens in the space (10) and is immersed in the recovered processing oil (KO).

  As shown in FIG. 7, the adjustment hole (7D) is formed on the upper side of the second pipe (7B), and communicates with the outside air (atmosphere) in the second pipe (7B).

  The drain pipe (7) having the above configuration and arrangement is secondarily separated because the second pipe (7B) is arranged at a position higher than the liquid level (b) of the primary separation tank (1). When filled with water-soluble processing oil (WO), a siphon effect is produced. And the drain pipe (7) secondary-separates the water-soluble processing oil (WO) of the flow rate difference (P1-P2) between the first pump device (3) and the second pump device (5) by the siphon effect. It flows from the outflow space (23) of the tank (2) into the recovery space (10) of the primary separation tank (1).

<Recovery / separation operation of processing oil separation system (X1)>
Next, the recovery / separation operation of the processing oil separation system (X1) will be described with reference to FIGS.
For convenience of explanation, the primary separation tank (1) stores the recovered processing oil (KO) and primarily separates it into a water-soluble processing oil (WO) and a mixed processing oil (BO). (2) stores mixed processing oil (BO) and is secondarily separated into water-insoluble processing oil (NO) and water-soluble processing oil (WO).

<1> Simultaneous supply / separation operation of water-insoluble processing oil (NO) and water-soluble processing oil (WO) In FIGS. 1 to 7, the operator of the machine tool (Y) gives a cutting command to the machine tool (Y). This is input to start cutting of the workpiece (Z), and a start command is input to the control device of the processing oil separation system (X).
The control device outputs suction / discharge driving commands to the first to third pump devices (3), (5), (6), and sucks / discharges each pump device (3), (5), (6). Discharge drive.

  When suction / discharge driving is performed, the first pump device (3) sucks mixed processing oil (BO) primarily separated from the outflow space (11) of the primary separation tank (1), 32) through the inflow space (24) of the secondary separation tank (2). At this time, the first pump device (3) causes the flow rate (P1) of mixed processing oil (BO) to flow into the inflow space (24). Further, the mixed processing oil (BO) flowing into the inflow space (24) is prevented from colliding with the partition plates (22B) and (22C) and diffusing to the outflow space (23) side.

  On the other hand, the second pump device (5) is secondarily separated from the outflow space (23) of the secondary separation tank (2) when driven by suction / discharge simultaneously with or behind the first pump device (3). The water-insoluble processing oil (NO) is sucked and supplied to the workpiece (Z) through the first supply pipe (31). At this time, the second pump device (5) supplies the water-insoluble processing oil (NO) at a flow rate (P2) to the workpiece (Z).

  Further, when the third pump device (6) is driven by suction / discharge, the third pump device (6) sucks the water-soluble processing oil (WO) primarily separated from the outflow space (11) of the primary separation tank (1), 2. Supply to the workpiece (Z) through the supply line (35).

By the suction / discharge drive of the first pump device (3) and the third pump device (6), mixed processing oil (BO) and water-soluble processing oil (WO) from the outflow space (11) of the primary separation tank (1). As shown in FIGS. 1 and 3, the recovered processing oil (KO) in the primary separation tank (1) flows from the recovery space (10) toward the outflow space (11). The recovered processing oil (KO) is primarily separated into the mixed processing oil (BO) and the water-soluble processing oil (WO) while meandering in the left-right direction in the process of flowing through the primary separation channel (12).
Further, with the flow of the recovered processing oil (KO), the water-soluble processing oil (WO) in the outflow space (23) of the secondary separation tank (2) passes through the drain line (7) to the primary separation tank (1). ) In the recovery space (10), whereby the drain line (7) is filled with water-soluble processing oil (WO).

On the other hand, by the suction / discharge drive of the first pump device (3) and the second pump device (5), the mixed working oil (BO) flows into the inflow space (24) of the secondary separation tank (2) and flows out. When the water-insoluble processing oil (NO) flows out from the space (23), the mixed processing oil (BO) in the secondary separation tank (2) flows into the inflow space (see FIG. 1 and FIG. 5). 24) to the outflow space (23).
The mixed processing oil (BO) is secondary to the water-insoluble processing oil (NO) and the water-soluble processing oil (WO) while meandering in the vertical direction in the course of flowing through the secondary separation channel (25). To be separated.
Moreover, as shown in FIG.1 and FIG.7, the drain pipe (7) is filled with water-soluble processing oil (WO), and the suction of the 1st pump apparatus (3) and the 2nd pump apparatus (5). / A siphon effect is produced with the ejection drive. Due to this siphon effect, the drain pipe (7) causes the water-soluble processing oil (WO) of the flow rate difference (P1-P2) of each pump device (3), (5) to flow out of the secondary separation tank (2). From the space (23), it flows into the recovery space (10) of the primary separation tank (1).
At this time, since the inside of the second pipe (7B) of the drain pipe (7) receives atmospheric pressure from the adjustment hole (7D), the liquid level (a) in the secondary separation tank (2) is high. (H).

  On the other hand, the water-insoluble processing oil (NO) secondarily separated by the suction / discharge drive of the second pump device (5) and the third pump device (6) is supplied to the first supply pipe (31) and the flow rate is adjusted. The water-soluble processing oil (WO) injected into the workpiece (Z) from each nozzle pipe (31A) through the valve (33) and primarily separated passes through the second supply pipe (35) to each nozzle pipe (35A). ) To the workpiece (Z).

Subsequently, each processing oil (NO), (WO) supplied to the workpiece (Z) flows down from the workpiece (Z) to the recovery flow path (15), and is primarily separated from the recovery port (14). It flows into the collection space (10) of the tank (1). At this time, each processing oil (NO) and (BO) flowing into the recovery space (10) is prevented from colliding with the partition plate (9A) and being diffused to the outflow space (11).
Each processing oil (NO) and (WO) that flowed into the recovery space (10) is turbid in the recovery space (10), and this recovered processing oil (KO) flows through the primary separation channel (12). Thus, while being meandering in the left-right direction, it is primarily separated into mixed processing oil (BO) and water-soluble processing oil (WO).

When the cutting of the workpiece (Z) by the machine tool (Y) is completed, the machine tool (Y) is stopped and a stop command is input to the control device. The control device stops the suction / discharge drive of the first to third pump devices (3), (5), (6), and makes the water-insoluble processing oil (NO) and the water-soluble processing oil (WO). Stop supplying.
Further, the inflow of the mixed processing oil (BO) and the outflow of the water-insoluble processing oil (NO) are also stopped with respect to the secondary separation tank (2).

  When the suction / discharge drive of the first and second pump devices (3) and (5) is stopped, the drain pipe (7) receives atmospheric pressure in the second pipe (7B). The separated water-soluble processing oil (WO) stops flowing in the drain pipe (7), and the liquid level (a) of the secondary separation tank (2) is maintained at the height (H).

<2> Water-insoluble processing oil (NO) supply / separation operation The water-insoluble processing oil (NO) supply / separation operation is performed simultaneously with the above-mentioned "<1> Each processing oil (NO), (WO) Since it is the same as the “supply / separation operation”, detailed description thereof is omitted.

1 to 7, the operator of the machine tool (Y) inputs a start command to a control device (not shown) of the machining oil separation system (X1).
The control device outputs suction / discharge commands to the first pump device (3) and the second pump device (5) to drive the pump devices (3) and (5) to suction / discharge.

When the first pump device (3) is driven by suction / discharge, the first processing device (3) sucks the mixed working oil (BO) from the outflow space (11) of the primary separation tank (1) and passes through the communication line (32). It flows into the inflow space (24) of the next separation tank (2).
In addition, when the second pump device (5) is driven for suction / discharge, the second pump device (5) sucks the water-insoluble processing oil (NO) from the outflow space (23) of the secondary separation tank (2), and supplies the first supply. It supplies to a workpiece (Z) through a pipe line (31).

  On the other hand, in the secondary separation tank (2), the mixed processing oil (BO) flows into the secondary separation flow path (25) as the first and second pump devices (3) and (5) are driven. Flows from the inflow space (24) to the outflow space (23) while meandering in the vertical direction, etc., and in this flow process, it is secondarily separated into water-insoluble processing oil (NO) and water-soluble processing oil (WO). The

Also, the drain pipe (7) flows out the water-soluble processing oil (WO) of the flow rate difference (P1-P2) of each pump device (3), (5) by the siphon effect from the secondary separation tank (2). From the space (23), it flows into the recovery space (10) of the primary separation tank (1).
In addition, since the inside of the second pipe (7B) of the drain pipe (7) receives atmospheric pressure from the adjustment hole (7D), the liquid level (a) of the secondary separation tank (2) is high ( H).

The water-insoluble processing oil (NO) secondarily separated by the suction / discharge drive of the second pump device (5) passes through the first supply pipe (31) and the flow rate adjustment valve (33) to each nozzle pipe (31A). ) To the workpiece (Z).
Subsequently, the water-insoluble processing oil (NO) supplied to the workpiece (Z) flows down from the workpiece (Z) to the recovery passageway (15), and then from the recovery port (14) to the primary separation tank ( 1) into the recovery space (10).
The water-insoluble processing oil (NO) that has flowed into the recovery space (10) is turbid in the recovery space (10), and this recovered processing oil (KO) flows through the primary separation channel (12). Primary separation into water-soluble processing oil (WO) and mixed processing oil (BO).

<3> Supply / separation operation of water-soluble processing oil (WO) In FIGS. 1 to 4, the operator of the machine tool (Y) inputs a start command to a control device (not shown) of the processing oil separation system (X1). To do.
The control device outputs a suction / discharge command to the third pump device (6) to drive the third pump device (6) to suction / discharge.

  When suction / discharge driving is performed, the third pump device (6) sucks the water-soluble processing oil (WO) primarily separated from the outflow space (11) of the primary separation tank (1) and supplies the second supply. It supplies to a workpiece (Z) through a pipe line (35). This water-soluble processing oil (WO) is injected from each nozzle tube (35A) onto the workpiece (Z).

Subsequently, the water-soluble processing oil (WO) supplied to the workpiece (Z) flows down from the workpiece (Z) to the recovery passageway (15), and then from the recovery port (14) to the primary separation tank (1). ) In the recovery space (10).
The water-soluble processing oil (WO) that has flowed into the recovery space (10) is turbid in the recovery space (10), and this recovered processing oil (KO) is mixed in the process of flowing through the primary separation channel (12). Primary separation into processing oil (BO) and water-soluble processing oil (WO).

As described above, according to the processing oil separation system (X1), the flow rate difference between the first and second pump devices (3) and (5) (P1−) using the siphon effect generated in the drain pipe (7). P2) water-soluble processing oil (WO) flows from the secondary separation tank (2) into the primary separation tank (1), and the liquid level (a) of the secondary separation tank (2) is raised to a height (H In order to prevent the secondary separation tank (2) from overflowing, it is not necessary to separately provide a pump device, and a detector for controlling the suction / discharge drive of this pump device is also required. do not do.
Further, in the processing oil separation system (X1), the water-soluble processing oil (WO) in the lower layer in the secondary separation tank (2) is caused to flow into the primary separation tank (1) by the drain line (7). Thus, overflow can be prevented, and the water-insoluble processing oil (NO) in the upper layer in the secondary separation tank (2) can be supplied to the workpiece (Z) by the second pump device (5) (see FIG. 1). ).

  Next, another embodiment of the processing oil separation system according to the present invention will be described with reference to FIG. The processing oil separation system (X2) shown in FIG. 8 has the same configuration as the processing oil separation system (X1) shown in FIG. 1, and in FIG. 8, the same reference numerals as those in FIG. The description is omitted.

In FIG. 8, the processing oil separation system (X2) includes a temperature controller (51) for adjusting the temperature of the water-soluble processing oil (WO) that has been primarily separated.
The temperature controller (51) is disposed in the circulation line (52). The circulation line (52) is disposed between the recovery space (10) and the outflow space (11) of the primary separation tank (1). Further, one end side of the circulation pipe (52) is opened in the recovery space (10), and the other end side of the circulation pipe (52) is opened in the outflow space (11) to be primarily separated. Soaked in water-soluble processing oil (WO).

The temperature controller (51) includes a pump device (not shown), and sucks the water-soluble processing oil (WO) primarily separated from the outflow space (11) of the primary separation tank (1), The water-soluble processing oil (WO) is heated / cooled to adjust the temperature (temperature control).
The water-soluble processing oil (WO) adjusted in temperature by the temperature controller (51) flows into the recovery space (10) of the primary separation tank (1) through the circulation line (52).
The water-soluble processing oil (WO) that has flowed into the recovery space (10) is mixed with the recovered processing oil (KO) and stirred.
Thereby, the contact area of the water-insoluble processing oil (NO) of the water-soluble processing oil (WO) whose temperature is adjusted and the recovered processing oil (KO) is increased, and the processing oil (WO), (NO) is Promotes heat transfer.

As described above, in the processing oil separation system (X1), the temperature is adjusted by adjusting the temperature of the water-soluble processing oil (WO) having a low viscosity and a large specific heat as compared with the water-insoluble processing oil (NO). The temperature of the water-insoluble processing oil (NO) of the recovered processing oil (KO) can be efficiently controlled by mixing the mixed water-soluble processing oil (WO) into the recovered processing oil (KO) and stirring.
Further, since the temperature adjustment of the water-insoluble processing oil (NO) is performed in the recovery space (10) of the primary separation tank (1) before being supplied to the workpiece (Z), the workpiece (Z) Can be supplied with temperature-controlled water-insoluble processing oil (NO).

  In the processing oil separation systems (X1) and (X2) according to the present invention, when the water-insoluble processing oil (NO) and the water-soluble processing oil (WO) are simultaneously supplied to the workpiece (Z), a water-soluble processing oil ( The processing waste such as water-insoluble processing oil (NO) and cutting waste adhering to the workpiece (Z) can be poured down into the recovery flow path (15) by WO. In addition, as water-soluble processing oil (WO), the water-soluble processing oil containing a water-soluble preservative etc. can also be used.

Further, in the processing oil separation systems (X1) and (X2), the water-insoluble processing oil (NO) is supplied to the workpiece (Z) and the water-soluble processing oil (WO) is supplied around the workpiece (Z). By spraying onto the workpiece, the machining waste scattered around the workpiece (Z) can be washed away.
In addition, after processing a to-be-processed body (Z) by supplying water-insoluble processing oil (NO), water-soluble processing oil (WO) can be injected and a processing waste can be washed away.
Moreover, as water-soluble processing oil (WO), the water-soluble processing oil containing a water-soluble preservative etc. can also be used.

Further, in the processing oil separation systems (X1) and (X2), the water-insoluble processing oil (NO) is supplied to the workpiece (Z) and the water-soluble processing oil (WO) is supplied around the workpiece (Z). The workpiece (Z) and the machine tool (Y) can be cooled by the water-soluble processing oil (WO).
In the processing oil separation systems (X1) and (X2), since the plurality of nozzle pipes (35A) are disposed outside the plurality of nozzle pipes (31A), the water-insoluble water jetted onto the workpiece (Z) Water-soluble processing oil (WO) can be injected so as to cover the processing oil (NO) from the outside, and the workpiece (Z) and the machine tool (Y) can be efficiently cooled.

  The present invention is suitable for a processing oil separation system that selectively or simultaneously supplies a water-insoluble processing oil and a water-soluble processing oil to a workpiece processed by a machine tool.

X1, X2 Processing oil separation system 1 Primary separation tank 2 Secondary separation tank 3 First pump device 5 Second pump device 7 Drain pipe NO Water-insoluble processing oil WO Water-soluble processing oil KO Collected processing oil BO Mixed processing oil a Liquid level b Liquid level P1 Flow rate P2 Flow rate

Claims (4)

A water-insoluble processing oil and a water-soluble processing oil are selectively or simultaneously supplied to a workpiece processed by a machine tool,
A processing oil separation system for recovering each processing oil from the machine tool and separating the recovered processing oil into a water-insoluble processing oil and a water-soluble processing oil based on a specific gravity difference,
A primary separation tank that stores the recovered processing oil and primarily separates the water-soluble processing oil and the mixed processing oil mixed with the processing oil;
A secondary separation tank for storing the primary separated mixed processing oil and performing secondary separation into a water-insoluble processing oil and a water-soluble processing oil;
A first pump device that sucks the primary separated mixed processing oil from the primary separation tank and flows it into the secondary separation tank;
A second pump device that sucks the water-insoluble processing oil that has been secondarily separated from the secondary separation tank and supplies it to the workpiece;
A drain line disposed in the primary separation tank and in the water-soluble processing oil of the secondary separation tank;
The flow rate of the mixed processing oil of the first pump device is set to be equal to or higher than the flow rate of the water-insoluble processing oil of the second pump device,
The liquid level in the secondary separation tank is higher than the liquid level in the primary separation tank,
The drain pipe causes the water-soluble processing oil to flow into the primary separation tank from the secondary separation tank as the pump devices are driven, and the amount of the water-soluble processing oil flows into the primary separation tank. A processing oil separation system configured and arranged to have a flow rate difference of a pump device. The drain line is
A first pipe extending from the water-soluble processing oil of the secondary separation tank to the liquid level;
A second pipe extending outside the secondary separation tank along the liquid surface continuously to the first pipe;
A third pipe that opens into the primary separation tank continuously to the second pipe;
The processing oil separation system according to claim 1, further comprising an adjustment hole communicating with the outside air in the second pipe line.   The processing oil separation system according to claim 1, further comprising a third pump device that sucks the water-soluble processing oil from the primary separation tank and supplies the suctioned water to the workpiece. A temperature controller for adjusting the temperature of the water-soluble processing oil flowing out of the primary separation tank;
The water-soluble processing oil whose temperature is adjusted by the temperature controller is
The processing oil separation system according to any one of claims 1 to 3, wherein the processing oil separation system flows into the primary separation tank and is mixed into the recovered processing oil.

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