JP2003019637A - Cleaning device for coolant for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device for coolant for a machine tool capable of cleaning coolant continuously and having excellent coolant cleaning efficiency. SOLUTION: This cleaning device for coolant for the machine tool is provided with a main magnetic separation device 1 for removing a magnetic substance from coolant from the machine tool, a storage tank 2 for storing coolant from the main magnetic separation device 1, a submagnetic separation device 5 for removing a remaining magnetic substance from coolant from the storage tank 2, a cylindrical tank 6 for letting coolant from the submagnetic separation device 5 flow in the direction of tangential line substantially and generating a turning stream in coolant therein, a filtration device 8 for separating an impurity from coolant in the vicinity of the center in a bottom part of the cylindrical tank 6, and a clean tank 9 for storing coolant from the filtration device 8. The coolant overflowing from the cylindrical tank 6 is supplied into the storage tank 2, and the coolant overflowing from the clean tank 9 is supplied into the cylindrical tank 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coolant cleaning device for machine tools for long-term use of coolant used in machine tools.

[0002]

2. Description of the Related Art A coolant used in a machine tool such as a grinder is generally stored in a coolant tank and is repeatedly used by circulating it between a coolant tank and each machine tool by a coolant pump.

Generally, a coolant used by a machine tool is introduced into a coolant tank after a magnetic substance such as chips is removed by a magnetic separator in advance. But,
The remaining fine chips and abrasive particles that were not removed by the magnetic separation device settled at the bottom of the coolant tank, and when the solidified sludge was sucked by the coolant pump, the sludge clogs the coolant piping and solenoid valve. Or
In addition, the clogging or the like affects the machining accuracy of the machine tool and causes wear or failure of movable parts such as the cylinder and chuck of the machine tool and jigs. For this reason,
It is necessary for the worker to clean the inside of the coolant tank on a regular basis.

Further, when the coolant contains impurities such as hydraulic oil, cutting fluid, cutting chips, and abrasive grains, anaerobic bacteria propagate in the coolant tank to produce a bad odor, which affects the working environment. However, there is concern that the performance of the coolant will deteriorate.

As a countermeasure against this, a coolant cleaning device has been proposed. For example, utility model registration No. 3009783
As shown in the explanatory view of FIG. 4 and shown in FIG. 4, a coolant containing impurities such as lubricating oil, cutting fluid, cutting chips, and abrasive grains is flowed into the dirty tank 101 by using a machine tool. When a predetermined amount is accumulated in 101, it is sent to a magnetic separation device 103 by a pump 102, a magnetic substance such as chips is adsorbed and separated by the magnetic separation device 103, and the coolant from which the magnetic substance is separated is tangentially close to the inner wall of the cylindrical tank 104. To generate a vortex in the cylindrical tank 104.

The residual fine chips and abrasive grains which are not removed by the magnetic separation device 103 mixed in the coolant discharged into the cylindrical tank 104 are gradually removed.
And descends while approaching the inner wall of the lower part of the conical part 105, and further descends along the inner wall of the lower inverted conical part 105 to accumulate at the center of the bottom part. Also,
When the discharge from the magnetic separation device 103 stops and the vortex flow becomes gentle, chips, abrasive grains, etc. gradually gather in the center of the cylindrical tank 104 in the shape of a rotating rod, and when the vortex flow is stopped, the inverted conical portion 105 is formed.
Settles in the center of.

The coolant cleaned by sedimentation of the remaining cutting chips and abrasive grains, etc., is pumped from the suction pipe arranged at a position avoiding the inner wall of the cylindrical tank 104 to the pump 10.
6 is sent to the machine tool.

On the other hand, residual sludge such as chips and abrasive particles accumulated in the inverted cone portion 105 is suspended and supported in the auxiliary tank 108 by opening the opening / closing valve 107 at an appropriate time in consideration of the accumulated state. It flows down into the bag 109 together with the coolant, is dehydrated, and is collected.

Another coolant cleaning device is disclosed in Japanese Utility Model Registration No. 3060849, and as shown in the explanatory view of FIG. 5, a magnetic separator 111, a coolant circulation pump 112, and a cleaned coolant. And a circular coolant tank 114 for pumping the oil to the machine tool.
A part of the cleaned coolant that is pressure-fed to the machine tool is ejected from the coolant ejection nozzle 115 in the tangential direction of the circular coolant tank 114 to generate a swirl in the circular coolant 114.

The lubricating oil recovered from the machine tool,
The coolant mixed with impurities such as cutting fluid, cutting chips, and abrasive grains is adsorbed and separated by a magnetic separator 111 from a magnetic substance such as cutting chips and flows out into a circular coolant tank 114.
On the other hand, a vortex flow is generated in the circular coolant tank 114 by the coolant liquid ejected from the coolant ejection nozzle 115, and fine chips and abrasive grains in the coolant that cannot be collected by the magnetic separator 111 are swirled together with the coolant. However, it gradually sinks and accumulates on the bottom surface of the central portion of the circular coolant tank 114. This circular coolant tank 11
Sludge such as fine chips and abrasive grains accumulated on the bottom surface of the central portion of 4 is sucked by the coolant circulation pump 112, pressure-fed to the magnetic separator 111, and filtered again to form a bottom surface of the circular coolant tank 114. Accumulation of cutting chips, abrasive grains, etc. on the surface is suppressed.

[0011]

[Problems to be Solved by the Invention] Utility Model Registration No. 3 above
According to Japanese Patent Laid-Open No. 009783, magnetic substances such as cutting chips are adsorbed and separated by a magnetic separation device 103 from a coolant supplied from a machine tool mixed with impurities such as lubricating oil, cutting fluid, cutting chips and abrasive grains, and Separate the coolant into a cylindrical tank 1
The cylindrical tank 10 is made to discharge tangentially near the inner wall of 04.
In order to clean the coolant, a vortex flow is generated in 4 and the remaining fine chips and abrasive grains are settled in the central portion of the inverted conical portion 105.

However, it is troublesome to open the on-off valve 107 and discharge the chips and abrasives accumulated in the inverted conical portion 105 from the inside of the cylindrical tank 104 at a proper time, and especially to accumulate on the inverted conical portion 105. It is feared that the solidified cutting chips, abrasive grains, etc. will require a lot of labor for the removal work. Also,
By opening the on-off valve 107, chips and abrasive grains are discharged together with the coolant, so that the cleaning of the coolant is interrupted during that period, which may affect smooth continuous operation of the machine tool or the like.

Further, there is a possibility that sufficient cleaning of the coolant cannot be achieved only by adsorption separation of chips and the like by the magnetic separation device 103 and sedimentation of the remaining chips and abrasive grains and the like by the cylindrical tank 104.

Further, according to Japanese Utility Model Registration No. 3060849, fine chips and abrasives accumulated on the bottom surface of the central portion of the circular coolant tank 114 are pressure-fed to the magnetic separator 111 again by the coolant circulation pump 112. As a result, the chips and abrasive particles accumulated in the circular coolant tank 114 are suppressed, and the coolant can be continuously cleaned.

However, similar to Japanese Utility Model Registration No. 3009783, sufficient cleaning of the coolant is possible only by adsorption separation of chips and the like by the magnetic separator 111 and sedimentation of the remaining chips and abrasive grains by the circular coolant tank 114. May not be achieved.

On the other hand, the tolerance of impurities mixed in the coolant used in the machine tool varies depending on the purpose of use of the coolant. For example, for machining such as cutting, a coolant with a very small mixture of chips and abrasive grains is required, while a coolant with a mixture of chips and abrasive grains can be used for cleaning machine tools. It is possible, and it is preferable in terms of cleaning efficiency of the coolant to supply the coolant according to the requirements of the intended use to the processing machine.

Therefore, an object of the present invention made in view of the above point is to provide a coolant cleaning device for machine tools, which is capable of continuously cleaning the coolant and is excellent in coolant cleaning efficiency.

[0018]

The invention for a cleaning device for a coolant for machine tools according to claim 1, which achieves the above object, is a device for cleaning a coolant for machine tools for cleaning a coolant used by a machine tool, A main magnetic separation device that removes a magnetic substance from a coolant used by a machine tool, a storage tank that stores the coolant from which the magnetic substance has been removed by the main magnetic separation device, and a coolant that remains from the coolant supplied from the storage tank. A sub magnetic separation device for removing magnetic material, and a cylindrical tank for causing the coolant from which magnetic material is removed by the sub magnetic separation device to flow in along a substantially tangential direction of the inner surface of the peripheral wall to generate a swirling flow in the coolant stored inside. And a first coolant recirculation means for supplying a part of the coolant of the cylindrical tank to the storage tank,
A filter device for separating impurities from the coolant discharged from near the center of the bottom of the cylindrical tank, a clean tank for storing the coolant from which impurities have been removed by the filter device, and a coolant from which impurities have been removed by the filter device. A second coolant recirculation means for supplying a part to the cylindrical tank.

According to the first aspect of the present invention, since the coolant flows from the sub-magnetic separator along the tangential direction of the inner surface of the peripheral wall of the cylindrical tank, a swirling flow is generated in the cylindrical tank to cause the bottom of the cylindrical tank. Accumulation of generated chips and abrasive grains is avoided in advance, maintenance such as cleaning of the cylindrical tank is unnecessary or extremely reduced, and the cleaning of the coolant by the cleaning device can be continuously performed without interruption, and The influence on continuous work can be avoided.

On the other hand, the coolant liquid in the cylindrical tank is supplied to the filtering device, impurities remaining such as chips and abrasive grains are removed by the filtering device, and the coolant cleaned by the filtering device is supplied to the clean tank. A coolant circulation cycle is formed in which a part of the coolant cleaned by the filter is returned to the cylindrical tank to dilute the mixing ratio of fine chips and abrasive grains mixed in the coolant in the cylindrical tank. In addition, the magnetic material such as chips in the coolant used by the machine tool is removed by the main magnetic separation device, and the coolant in the storage tank is adsorbed and separated by the sub magnetic separation device. Supplying the coolant from which chips, etc. have been removed to the cylindrical tank, and returning a part of the coolant from the cylindrical tank to the storage tank to mix it with the coolant in the storage tank. A circulation cycle of coolant is formed that dilutes. The coolant is sufficiently cleaned by repeating these circulation cycles.

According to a second aspect of the present invention, in the apparatus for cleaning a machine tool according to the first aspect, the first coolant recirculation means supplies the coolant overflowing from the cylindrical rank to the storage tank. And

According to the second aspect of the present invention, the coolant in the upper portion of the cylindrical tank, in which chips and the like are removed by the sub magnetic separation device and which is relatively free from the mixture of chips and abrasive grains overflowing from the cylindrical tank, is stored in the storage tank. By supplying, it is possible to more effectively dilute the mixing ratio of fine chips and abrasive particles mixed in the coolant in the storage tank.

According to a third aspect of the present invention, in the coolant cleaning device for machine tools according to the first or second aspect, the second coolant recirculation means causes the coolant overflowing from the clean tank to the cylindrical tank. It is characterized in that it flows in and is supplied along a substantially tangential direction of the inner surface of the peripheral wall.

According to the third aspect of the present invention, the swirling flow in the cylindrical tank can be promoted by causing the coolant overflowing from the clean tank to flow into the cylindrical tank along the substantially tangential direction of the inner surface of the peripheral wall thereof. Accumulation of cutting chips, abrasive grains, etc. on the bottom of the cylindrical tank can be more reliably avoided. Further, it is possible to more effectively dilute the mixing ratio of fine chips and abrasive grains mixed in the coolant in the cylindrical tank.

According to a fourth aspect of the present invention, there is provided a coolant cleaning device for machine tools according to any one of the first to third aspects,
Further, there is provided a first coolant supply means for supplying the coolant in the clean tank to the machine tool, and a second coolant supply means for supplying the coolant in the storage tank to the machine tool, and a coolant in the cylindrical tank. Of at least one of the third coolant supply means for supplying the coolant to the machine tool and the fourth coolant supply means for supplying the coolant containing the impurities separated by the filtering device to the machine tool. It is characterized by having means.

According to the fourth aspect of the present invention, it is possible to supply the coolant having the cleanliness degree according to the required accuracy from each coolant supply means in accordance with the purpose of use of the coolant of the machine tool, thereby improving the cleaning efficiency of the coolant. Is obtained.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a machine tool coolant cleaning apparatus according to the present invention will be described with reference to FIGS.

FIG. 1 is a plane layout explanatory view of the cleaning apparatus according to the present embodiment, and FIG. 2 is a side layout illustration.

This cleaning device includes a main magnetic separation device 1, a storage tank 2, a first circulation pump 3, a sub storage tank 4, a sub magnetic separation device 5, a cylindrical tank 6, a second circulation pump 7, a filtration device 8, and a clean. It is composed of a tank 9, a processing pump 10, and piping.

The main magnetic separation device 1 is for adsorbing and separating a magnetic substance mixed in the coolant with a magnet or the like and filtering the coolant. For example, the lubricating oil, cutting fluid, etc. sent from a machine tool such as a grinding machine, Magnetic substances such as chips are adsorbed and separated from a coolant containing impurities such as chips and abrasive grains. The coolant from which magnetic substances such as chips have been removed by the main magnetic separation device 1 is guided from the bottom of the main magnetic separation device 1 to the flow path 11 and flows down to the storage tank 2.

The coolant stored in the storage tank 2 is pumped up from the vicinity of the bottom of the storage tank 2 by the circulation pump 3, and a part of the coolant is pumped to the sub-storage tank 4 by the flow passage 12 and partly. Is the flow path 12
It is supplied to the sub magnetic separation device 5 by the flow path 13 branched from.

The coolant supplied to the sub-storage tank 4 is used as a cleaning coolant for a machine tool that can be used even if chips and abrasive particles are mixed in a relatively large amount, from the flow passage 14 which is the second coolant supply means. Used and supplied to machine tools.

The coolant supplied to the sub magnetic separation device 5 is adsorbed and separated from the remaining fine chips which have not been removed by the main magnetic separation device 1. The coolant from which chips and the like have been removed by the sub magnetic separation device 5 is guided to the cylindrical tank 6 through the flow path 15 and extends substantially tangentially from the cylindrical portion 6a of the cylindrical tank 6 to the inner surface of the peripheral wall of the cylindrical tank. It is made to flow into 6.

The cylindrical tank 6 has a cylindrical portion 6a in which the flow passage 15 opens, and an inverted conical bottom portion 6b formed continuously under the cylindrical portion 6a. A gentle swirl flow is generated by the tangentially flowing coolant. Due to this gently flowing swirling flow, impurities such as fine chips and abrasive grains remaining in the coolant gather in the center of the cylindrical tank 6 in the shape of a rotating rod and settle on the central portion of the bottom portion 6b.

The coolant in the cylindrical tank 6 is pumped up by the second circulation pump 7 from the vicinity of the central portion of the bottom portion 6b of the cylindrical tank 6, and from the second circulation pump 7 through the flow passage 16 which is the third coolant supply means. A part is pumped to the machine tool as coolant for cleaning the machine tool. Also, the second
A part of the coolant pumped by the circulation pump 7 is
It is supplied to the filtration device 8 by a flow path 17 branched from the flow path 16.

In the filtering device 8, the coolant from the flow path 17 is supplied along the tangential direction and the clean tank 9 is used.
The cylindrical portion 8a in which the flow path 18 for delivering the cleaned coolant is disposed, the reverse conical portion 8b formed continuously in the lower portion of the cylindrical portion 8a, and the fourth coolant supply means at the center of the lower end of the reverse conical portion 8b. The flow path 19 which becomes is communicating.

The coolant liquid supplied from the flow path 17 along the tangential direction of the cylindrical portion 8a of the filtering device 8 is the cylindrical portion 8a.
It becomes a swirl flow inside, and impurities such as fine chips and abrasive grains remaining in the coolant while swirling gather in the center in the shape of a rotating rod, and are machined together with the coolant from the center of the lower end of the inverted conical portion 8b through the flow path 19. Delivered as coolant for machine cleaning. The coolant from which impurities such as fine chips and abrasive grains are sufficiently removed is fed from the flow path 18 to the clean tank 9 and stored therein. The coolant stored in the clean tank 9 is pumped up by the processing pump 10 and supplied to the machine tool as the processing coolant from the flow path 20 which is the first coolant supply means.

On the other hand, a part of the coolant from which the impurities have been sufficiently removed by the filtering device 8 overflows from the second coolant recirculation means, which is the clean tank 9 in the present embodiment, and flows down to the cylindrical tank 6 and is then flown by the straightening plate 21. Fine chips that are mixed with the coolant in the cylindrical tank 6 by being guided along the inner surface of the peripheral wall of the cylindrical tank 6 to promote the swirling flow in the cylindrical tank 6 and returning the cleaned coolant to the cylindrical tank 6. Dilute the mixture ratio of abrasive grains. Moreover, the liquid level of the clean tank 9 is maintained constant by this overflow.

Further, the first coolant recirculation means for guiding the coolant overflowing from the predetermined height position of the cylindrical tank 6 to the storage tank 2 and dropping it, the recirculation path 22 in this embodiment, is provided to overflow the cylindrical tank 6. The upper part of the coolant in the cylindrical tank 6 containing a relatively small amount of fine chips and abrasive grains that are relatively mixed, so-called supernatant, is supplied to the storage tank 2 and the fine chips and abrasive grains mixed in the coolant in the storage tank 2 are mixed. Dilute the mixture ratio of. Further, the overflow keeps the liquid level of the cylindrical tank 6 constant.

According to the cleaning device thus constructed,
The coolant from the sub magnetic separation device 5 flows into the cylindrical tank 6 along the tangential direction of the inner surface of the peripheral wall via the flow path 15, and the coolant overflowing from the clean tank 9 is directed to the inner surface of the peripheral wall of the cylindrical tank 6 by the straightening plate 21. Guided along, a swirling flow is generated in the cylindrical tank 6 as indicated by an arrow R, and by this swirling, fine chips and abrasive grains remaining in the coolant gather at the center of the cylindrical tank 6 and settle. The settling chips and abrasives are stored in the cylindrical tank 6
Is pumped by the second circulation pump 7 from the vicinity of the bottom portion 6b.

Therefore, the generation of sludge such as chips and abrasives accumulated on the bottom portion 6b of the cylindrical tank 6 is effectively avoided in advance, and maintenance such as sludge removal work in the cylindrical tank 6 is unnecessary or extremely small. Therefore, the cleaning of the coolant by the cleaning device can be continuously performed without interruption, and the influence on the continuous work of the machine tool or the like can be avoided.

Further, as shown in FIG. 3 (a), the coolant in the cylindrical tank 6 is supplied to the filtering device 8 by the second circulation pump 7 to remove impurities such as chips and abrasive grains remaining by the filtering device 8. The sufficiently clean coolant is supplied to the clean tank 9, and the coolant that overflows from the clean tank 9 is returned to the cylindrical tank 6 again to mix the fine chips and abrasive grains mixed in the coolant in the cylindrical tank 6. A first minute circulation cycle of the coolant is formed that dilutes the.

Further, as shown in FIG. 3B, the coolant in the storage tank 2 is fed by the first circulation pump 3 to adsorb and separate chips and the like by the sub magnetic separation device 5, and the sub magnetic separation device 5 The coolant from which chips and the like have been removed is supplied to the cylindrical tank 6, and the coolant that has overflowed from the cylindrical tank 6 and contains a relatively small amount of chips and abrasive particles is supplied to the storage tank 2. Storage tank 2
A second circulation cycle of the coolant is formed to dilute the mixing ratio of fine chips and abrasive grains mixed in the coolant therein.

Further, as shown in FIG. 3C, the coolant collected from the machine tool or the like is supplied to the main magnetic separation device 1, and the main magnetic separation device 1 adsorbs and separates the magnetic substance mixed in the coolant, The mixture of fine chips and abrasive particles mixed in the coolant is diluted by the coolant that is supplied into the storage tank 2 and overflows from the cylindrical tank 6 in the storage tank 2, and the fine cutting mixed in the storage tank 2 is mixed. A coolant in which impurities such as powder and abrasive grains are diluted is sent to the sub storage tank 4 by the first circulation pump 3, supplied from the sub storage tank 4 to the machine tool as a coolant for machine tool cleaning, and then machined again. A third circulation cycle of the coolant liquid supplied from the machine or the like to the main magnetic separation device 1 is formed.

The first circulation cycle of this coolant, the second
The coolant is cleaned by repeating the circulation cycle and the third circulation cycle, and the coolant having a cleanness according to the purpose of use in each machine tool is supplied to each machine tool from each coolant supply means. For example, for cleaning a machine tool in which a mixture of cutting chips and abrasive grains is relatively permitted, the coolant stored in the sub storage tank 4 is supplied from the flow path 14 to the machine tool, and similarly, the coolant of the filtering device 8 is used. The coolant discharged from the lower end is supplied from the flow path 19 to the machine tool. On the other hand, when cleaning a machine tool that requires a coolant containing less chips and abrasive grains than the coolant supplied from the flow paths 14 and 19, the flow path 16 is moved from the inside of the cylindrical tank 6 by the second circulation pump 7. The coolant supplied to the machine tool through is used. Further, for processing that requires a cleaner coolant, in which impurities such as chips and abrasives are extremely small, the coolant that has been further cleaned by the filtration device 8 and stored in the clean tank 9 is processed by the processing pump 10. It is supplied to the machine tool through the flow path 20 and used for machining.

Therefore, it becomes possible to supply coolants having different degrees of cleanliness to the machine tool according to the purpose of use of the coolant in the machine tool, and it is possible to clean the coolant in accordance with the requirements, and it is possible to obtain excellent coolant cleanliness. It is expected that the efficiency of gasification will be improved and the cost of cleaning the coolant will be significantly reduced.

The present invention is not limited to the above-described embodiments, but can be variously modified without departing from the spirit of the invention. For example, in the above-described embodiment, the coolant that overflows from the clean tank 9 is removed from the cylindrical tank 6
However, if a sufficient storage amount of the clean tank 9 can be secured, a part of the coolant from which impurities have been removed by the filtering device 8 is directly supplied to the cylindrical tank 6 without passing through the clean tank 9. You can also Further, although the coolant was made to flow down from the bottom of the main magnetic separation device 1 by the flow path 11 and supplied to the storage tank 2, if it is difficult to secure the height difference between the main magnetic separation device 1 and the storage tank 2. It is also possible to pump the coolant liquid, and similarly, it is also possible to pump the coolant liquid to the cylindrical tank 6 from the sub magnetic separation device 5 to supply it. Further, in the above-described embodiment, the coolant in the cylindrical tank 6 is pumped upward from the vicinity of the bottom portion 6b by the second circulation pump 7, but is discharged downward from the central portion of the bottom portion 6b and discharged by the second circulation pump 7. It is also possible to pump to the lines 16, 17.

[0048]

According to the present invention, the chips generated at the bottom of the cylindrical tank by the swirling flow generated in the cylindrical tank by injecting the coolant from the sub magnetic separator along the tangential direction of the inner surface of the peripheral wall of the cylindrical tank. Accumulation of abrasive grains and abrasives is avoided in advance, maintenance such as cleaning of the cylindrical tank is unnecessary or extremely reduced, and the cleaning of the coolant by the cleaning device can be performed continuously without interruption, and it can be used for continuous work such as machine tools. The influence can be avoided.

On the other hand, the coolant in the cylindrical tank is supplied to the filtration device, impurities remaining such as chips and abrasive grains are removed by the filtration device, and the coolant cleaned by the filtration device is supplied to the clean tank and filtered. A coolant circulation cycle is formed in which a portion of the coolant cleaned by the vessel is returned to the cylindrical tank to dilute the mixing ratio of fine chips and abrasive grains mixed in the coolant in the cylindrical tank.
The magnetic material such as chips in the coolant used by the machine tool is removed by the main magnetic separation device, and the coolant in the main storage tank is adsorbed and separated by the sub magnetic separation device. Coolant circulation that supplies coolant from which chips have been removed to a cylindrical tank, and also supplies it from the cylindrical tank to the storage tank to dilute the mixing ratio of fine chips and abrasive particles mixed in the coolant in the storage tank. A cycle is formed and the circulation cycle is repeated to sufficiently clean the coolant.

Further, by arranging a coolant supply means for supplying the coolant from each part to the machine tool, each coolant supply means supplies the coolant having the cleanliness degree according to the required accuracy according to the purpose of use of the coolant of the machine tool. It is possible to improve the cleaning efficiency of the coolant.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of a cleaning device showing an outline of an embodiment of a cleaning device for a coolant for machine tools according to the present invention.

FIG. 2 is likewise a side view of the cleaning device.

FIG. 3 is a circulation cycle explanatory view showing an outline of the cleaning action of the cleaning apparatus, wherein (a), (b) and (c) are respectively the first circulation cycle, the second circulation cycle and the third circulation cycle. FIG.

FIG. 4 is an explanatory view of a conventional cleaning device for a coolant for machine tools.

FIG. 5 is an explanatory diagram of a conventional cleaning device for a coolant for machine tools.

[Explanation of symbols]

1 Main magnetic separation device 2 Storage tank 3 First circulation pump 4 Sub storage tank 5 Sub magnetic separation device 6 cylindrical tank 7 Second circulation pump 8 Filtration device 9 clean tank 10 Processing pump 14 flow path (second coolant supply means) 16 flow paths (third coolant supply means) 19 flow path (4th coolant supply means) 20 flow paths (first coolant supply means) 21 Current plate 22 Return path (first coolant return means)

Claims (4)

[Claims] 1. A cleaning device for a coolant for a machine tool for cleaning a coolant used by a machine tool, comprising: a main magnetic separation device for removing a magnetic substance from the coolant used by the machine tool; A storage tank that stores the coolant from which the body has been removed, a sub magnetic separation device that removes the residual magnetic material from the coolant that is supplied from the storage tank, and a coolant from which the magnetic material has been removed by the sub magnetic separation device is the inner surface of the peripheral wall. A cylindrical tank for generating a swirl flow in the coolant stored therein, which flows in along a substantially tangential direction, first coolant recirculation means for supplying a part of the coolant of the cylindrical tank to the storage tank, and the cylinder. A filter device for separating impurities from the coolant discharged from the vicinity of the center of the bottom of the tank, and the filter device for impurities. A coolant for machine tools, comprising: a clean tank for storing the removed coolant; and a second coolant recirculation means for supplying a part of the coolant from which impurities have been removed by the filtration device to the cylindrical tank. Cleaning equipment. 2. The machine tool coolant cleaning device according to claim 1, wherein the first coolant recirculation unit supplies the coolant overflowing from the cylindrical tank to the storage tank. 3. The second coolant recirculation means supplies the coolant overflowing from the clean tank to the cylindrical tank along a substantially tangential direction of an inner surface of a peripheral wall of the cylindrical tank. The coolant cleaning device for machine tools according to 1 or 2. 4. A second coolant supply means for supplying the coolant in the clean tank to the machine tool, and a second coolant supply means for supplying the coolant in the storage tank to the machine tool. At least one of the third coolant supply means for supplying the coolant in the cylindrical tank to the machine tool and the fourth coolant supply means for supplying the coolant containing the impurities separated by the filtering device to the machine tool. The coolant cleaning device for machine tools according to any one of claims 1 to 3, further comprising one coolant supply means.