JPH09309043A - Machining chip removing device for machine tool coolant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely remove machining chips included in a coolant in those circulating the coolant for a machine tool. SOLUTION: A coolant circulation system 1 is so constituted that a coolant Co reserved in a tank 3 is supplied to a grinding machine 2 through a coolant supply passage 4 having a filter 7, and the coolant Co after use is recovered in the tank 3 through a coolant recovery passage 5 having a magnetic separator 8. Also, the coolant Co reserved in the tank 3 is fed to the magnetic separator 7 through a return passage 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool removal device for a coolant for a machine tool for circulating and using a coolant for grinding.

[0002]

2. Description of the Related Art Conventionally, it is generally known that in a work using a grinding machine, a grinding coolant is supplied to a grinding portion for the purpose of cooling and lubrication.

The coolant is stored in, for example, a tank, is supplied to a grinding machine by a pump drive, and after use,
It is sent to the magnetic separator through the recovery pipe. Then, in this magnetic separator, the grinding dust contained in the coolant is adsorbed and removed, and is returned to the tank.
As a result, the coolant is reused while being purified.

[0004]

However, it is difficult to completely remove the cutting chips with the above magnetic separator,
A lot of grinding debris that was not removed in this way is mixed in the tank.

Therefore, when the coolant is supplied to the grinder, the coolant is supplied to the grinder while containing the minute grinding dust that cannot be removed, and as a result, the finish accuracy of the workpiece is affected. It has occurred. Further, when the grinding dust collecting filter is provided, a large amount of grinding dust contained in the coolant is collected in the filter, so that there is a problem that the life of the filter is significantly reduced and the maintenance cycle is shortened.

The present invention has been made in order to solve the above-mentioned problems, and in a system in which a coolant is circulated and used for a machine tool, the machine waste contained in the coolant is appropriately removed while being supplied to the machine tool. Coolant for machine tools that can be used as a machine tool removal device.

[0007]

According to the present invention, a coolant stored in a tank is used while being circulated to a machine tool, and foreign matter contained in the coolant supplied from the tank to the machine tool is filtered. Filter-type removing means for collecting with a magnetic force, magnetic removing means for adsorbing and collecting work scraps of foreign matter contained in the coolant collected from the machine tool, and magnetic fluid for collecting the coolant stored in the tank with the magnetic The reverse feeding means for feeding to the removing means is provided in the coolant circulation path.

According to this structure, the coolant is fed to the machine tool through the filter-type removing means, and thereafter, the machine waste is removed by the magnetic removing means and is collected in the tank.
In addition to the circulation of the coolant to the machine tool, the coolant in the tank is fed to the magnetic removing unit by the reverse feeding unit and returned to the tank. Therefore, the work scraps fed into the tank without being completely removed in the process of being returned from the machine tool to the tank are effectively removed.

In particular, since the machining waste in the coolant is often mixed with oil and floats on the surface of the stored coolant, the tank is divided into the main tank and the sub-tank for storing the coolant overflowing from the tank. If the coolant is supplied from the main tank to the machine tool and the reverse feed means is configured to feed the coolant in the sub-tank to the magnetic removal means, the machining waste contained in the coolant Since it is efficiently collected in the sub-tank and fed to the magnetic removal means, the work scraps contained in the coolant in the main tank are effectively reduced, which improves the purity of the coolant fed to the machine tool. To be enhanced.

Further, if the feeding means for feeding the coolant after passing through the magnetic removing means to the main tank is provided, and the feeding means is provided with the separating means for separating the work scraps from the coolant, the coolant in the main tank is removed. It is possible to more effectively reduce the content of the work scraps. In particular, if a cyclone type separating device is used as the separating means and the separated work pieces are fed to the magnetic removing means, it is structurally simple and the removed work pieces are integrally captured by the magnetic removing means. Since they can be collected, it is advantageous in terms of discarding work scraps and the like.

Further, a partition container communicating with the storage coolant is provided in the sub-tank, and the coolant after passing through the magnetic removal means is collected in the partition container, and the coolant is sucked up from the partition container. If the feeding means is configured, it becomes possible to efficiently collect and remove the work scraps in the partition container.

[0012] Further, as described above, in many cases, the work scraps are mixed with oil or the like and float on the surface of the stored coolant. If the reverse feeding means is configured to feed the means, it becomes possible to more efficiently remove the work scraps in the stored coolant.

[0013]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows a first embodiment of a coolant circulation system of a machine tool to which a machined waste removing device according to the present invention is applied. As shown in the figure, the coolant circulation system 1 (hereinafter, referred to as the circulation system 1) is provided with a tank 3 for storing the coolant Co, and the coolant Co in the tank 3 is supplied by driving the pump 6. The coolant Co is supplied to the grinder 2 which is a machine tool through a passage 4 (hereinafter abbreviated as supply passage 4), and the used coolant Co is further passed through a coolant recovery passage 5 (hereinafter abbreviated as recovery passage 5) to the tank. The circulation system 1 is configured so as to be returned to 3.

A filter 7 is provided in the supply passage 4 so that foreign matter contained in the coolant Co is removed and supplied to the grinder 2. Filter 7
For example, it has a bag body made of a synthetic resin non-woven fabric or the like inside thereof, and is configured to filter and collect foreign matter by permeation of the coolant Co.

The recovery passage 5 is provided with a magnetic separator 8 for removing grinding dust contained in the recovered coolant Co. The magnetic separator 8 includes, for example, a magnet roller 8b that is rotated by a motor drive inside a container 8a as shown in FIG.
The collected coolant is temporarily stored in this container 8a and fed to the tank 3 to remove the grinding dust by magnetically adsorbing it on the surface of the magnet roller, and then scraped onto the slope 8c and collected in the collection container 8d. Is configured to.
In the present embodiment, the magnet roller is configured by using a rare earth magnet having a stronger holding force than that of a general ferrite magnet, so that the grinding dust removing function is enhanced.

As shown in FIG. 1, the magnetic separator 8 is connected to the front end of a return passage 9 whose rear end is connected to the tank 3, and the coolant Co stored in the tank 3 when the pump 10 is driven. Is fed to the upstream side of the magnetic separator 8 via the return passage 9.

At the tip of the return passage 9, there is a coolant C.
A member called a Q pot 11 which constitutes an intake port for o is attached. As shown in FIG. 3, the Q pot 11 has a cylindrical resin-made take-in member 13 inserted at the rear end of the return passage 9, and the take-up member 13 is attached to the outer periphery of the bellows. The structure is such that it is attached to the attachment portion 12 at the end of the return passage via the elastic member 14. Q
An appropriate amount of coolant Co is stored in the pot 11, and when the pump 10 is driven, the coolant Co of the Q pot 11 is introduced into the return passage 9
While sucking up via a, the intake member 13 is lowered by the suction force (shown by the broken line in the figure), and the coolant Co is introduced into the inside through the notch 13a formed in the peripheral portion thereof. Has become. As a result, among the coolant Co stored in the tank 3, mainly the coolant Co on the surface portion thereof is fed to the magnetic separator 8 via the return passage 9. On the other hand, when the pump 10 is stopped, the intake member 13 is lifted by the buoyancy of the intake member 13 and the notch 13a is arranged above the liquid surface of the coolant, so that the coolant C into the Q pot 11 is discharged.
It is designed to prevent the introduction of o. That is, the Q pot 11 and the return passage 9 constitute a reverse feeding means.

In the circulation system 1 configured as described above, the coolant Co is sucked up from the tank 3 by driving the pump 6, and foreign matter is removed by the filter 7 and then supplied to the grinder 2. Then, the used coolant Co is fed to the magnetic separator 8 through the recovery passage 5, where the grinding dust mixed in the grinder 2 is adsorbed,
It is removed and returned to the tank 3. By doing so, the coolant Co is circulated and supplied to the grinder 2 while being purified.

While the coolant Co is being circulated and supplied in this manner, the pump 10 is driven to feed the coolant Co of the tank 3 to the magnetic separator 8 through the return passage 9. Thus, the grinding dust fed to the tank 3 without being completely removed in the process of being returned from the grinding machine 2 to the tank 3 is removed and collected by the magnetic separator 8.

As described above, according to the circulation system 1,
The coolant Co stored in the tank 3 returns to the return passage 9
The grinding dust contained in the stored coolant Co is removed by being fed to the magnetic separator 8 via the magnetic separator 8. Therefore, the content of the grinding dust in the stored coolant Co can be effectively reduced. . Therefore, it is possible to effectively increase the purity of the coolant Co supplied to the grinding machine 2, and since the content of the work waste is large as in the conventional device of this type, the finish accuracy of the work is affected. It is possible to effectively suppress the occurrence of actual situations such as going out. In particular, the grinding dust in the stored coolant is often mixed with oil or the like and floats on the surface of the stored coolant. However, according to the configuration of the circulation system 1, mainly the stored coolant Co in the tank is Coolant Co on the surface
Is fed to the magnetic separator 8 via the return passage 9, so that the grinding dust in the stored coolant is fed to the magnetic separator 8 very efficiently and is removed and collected.

Further, according to the circulation system 1, as described above, the content of the grinding dust in the stored coolant Co is reduced, so that the amount of the grinding dust filtered by the filter 7 is reduced. Therefore, compared to conventional devices of this type,
There is also an advantage that the maintenance cycle of the filter provided in the supply passage can be extended.

Next, a second embodiment of the coolant circulation system of the machine tool to which the device for removing work scraps according to the present invention is applied will be described with reference to FIG. It should be noted that members common to those of the circulation system 1 according to the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted, and only different points will be described in detail below.

As shown in the figure, in the circulation system 20 of the second embodiment, the inside of the tank 3 is a main tank 3a due to a partition wall.
And a sub-tank 3b, the rear end of the supply passage 4 is the main tank 3a, and the tip of the recovery passage 5 is the sub-tank 3
The return passages 9 are connected to the respective b-sides and are configured to feed the coolant Co in the sub-tank 3b to the magnetic separator 8.

The sub-tank 3b has an upper opening,
The bottom of the sub-tank 3b communicates with the inside of the sub-tank 3b. More specifically, a part of the sub-tank 3b lower than the liquid level of the coolant Co to some extent (a depth where the amount of grinding dust is relatively small).
A partition container 26 communicating with each other is provided. Then, the rear end of the sub-return passage 21 for sucking up the coolant Co by driving the pump 25 intervenes in the partition container 26, and the tip of the sub-return passage 21 is connected to the input side of the cyclone separation device 22. Has been done.
The output side of the cyclone separator 22 is connected to the main tank 3a via the communication passage 24, while the collecting side of the cyclone separator 22 is the magnetic separator 8
It is connected to the. As shown in FIG. 5, the cyclone-type separation device 22 internally generates a rotary flow by supplying the fluid to the input side 22a, and the centrifugal force causes the fluid to be discharged from the output side 22b while containing impurities, that is, impurities. It is configured to separate and discharge grinding dust and the like to the collecting side 22c.

Also in the circulation system 20 of the second embodiment configured as described above, basically, the coolant Co is supplied between the tank 3 and the grinding machine 2 via the supply passage 4 and the recovery passage 5. Although it is circulated, in the circulation system 20, the coolant Co recovered from the grinder 2 is used.
Is first fed into the compartment 26, and the sub-return passage 2
1 to be fed to the cyclone separation device 22. Grinding chips are separated here, and the separated coolant Co is discharged to the main tank 3 a via the communication passage 24, and the separated grinding chips are discharged to the magnetic separator 8.

In the tank 3, as described above, the communication passage 2
The coolant Co fed to the main tank 3a via 4 overflows into the sub tank 3b, and in the sub tank 3b,
Similar to the circulation system 1, of the stored coolant Co in the sub tank 3b, the coolant Co mainly on the surface portion thereof is used.
Are fed to the magnetic separator 8 via the return passage 9.

That is, according to this circulation system 20,
The grinding debris contained in the recovered coolant is first removed in the cyclone separation device 22. Then, the grinding dust not removed here and fed to the main tank 3a is moved to the sub-tank 3b due to overflow from the main tank 3a and fed to the magnetic separator 8 via the return passage 9. It has become so.

According to such a circulation system 20, it is possible to further reduce the content ratio of the grinding dust of the stored coolant Co in the main tank 3a. Therefore, the purity of the coolant Co supplied to the grinder 2 can be effectively increased as compared with the circulation system 1 of the first embodiment. Therefore, it is advantageous when a large amount of grinding dust is generated.

The circulation system 1 and the circulation system 20 are typical examples of the circulation system to which the work waste removing device of the present invention is applied, and their specific configurations do not depart from the gist of the present invention. The range can be appropriately changed.

For example, in the circulation system 20 of the second embodiment, the coolant C sucked from the inside of the partition container 26 is used.
The cyclone-type separation device 22 is used as a separating means for separating the grinding dust in the o, and the separated grinding dust is separated by the magnetic separator 8
However, other separating means may be constructed. However, the use of the cyclone separation device 22 is advantageous in this respect because it does not require maintenance work such as replacement of the nonwoven fabric as in the case of using a filter.

Further, the circulation system 2 of the second embodiment described above.
At 0, the cyclone separator 22 and the communication passage 24
The partition container 26 is omitted, and the coolant Co in the sub tank 3b is directly supplied to the main tank 3 through the sub return passage 21.
It may be configured to be fed to a. In this case, since most of the contained grinding dust floats on the surface portion of the coolant Co as described above, in the configuration of the second embodiment described above, the depth of the coolant Co in the sub tank 3b in which the grinding dust is relatively small. Therefore, it is desirable to suck up the coolant Co. Further, the collected coolant Co may be discharged directly from the magnetic separator 8 to the main tank 3a. In any case, the coolant C from the main tank 3a
Since the grinding debris can be fed to the magnetic separator 8 through the return passage 9 while being collected in the sub-tank 3b due to the overflow of o, it is slightly inferior to the circulation system 20 in accuracy, but has a simple structure. It is possible to remove the grinding dust in the stored coolant Co.

Further, instead of the filtering device 7, for example, a filtering device 30 as shown in FIG. 6 can be applied. In addition, this figure shows an example in which such a filtering device 30 is applied to the circulation system 20 of the second embodiment.

That is, the coolant Co supplied from the tank 3 to the grinder 2 is first passed through the coarse first filter 31 and stored in the first intermediate tank 33, while the intermediate tank 3 is stored.
3 overflows into the main tank 3a of the tank 3. Then, from the first intermediate tank 33 to the pump 35
The coolant Co is sucked up by the driving of the first filter 31 and the coolant Co is passed through the second filter 32, which is finer than the first filter 31, and then stored in the second intermediate tank 34 while being pumped from the second intermediate tank 34. Alternatively, Co may be sucked up by driving 36 and supplied to the grinding machine 2.
According to such a configuration, it is possible to supply the coolant Co with high purity to the grinder 2 even more than the circulation system 20 of the second embodiment, and when the coolant Co is supplied at high pressure, high accuracy can be obtained. Effective when required.
In the case of this configuration, the coolant Co in the main tank 3a is directly supplied to the grinder 2 through the supply passage 39 by driving the pump 38 (for example, shown in a broken line in the figure), and a request is made. Depending on the finishing accuracy of the object to be ground, the coolant Co may be selected to be supplied through the filter device 30 or not supplied.

In the example of FIG. 4 and the example of FIG. 6, the sub-return passage 21 sends the coolant Co sucked up from the partition container 26 to the cyclone separator 22, but the partition container 26 is omitted and the coolant Co is omitted. Directly to the sub tank 3b
It may be sucked up from the inside and sent to the cyclone separation device 22. Alternatively, in the system of FIG. 1, the cyclone separator 22 may be provided, and the sub-return passage and the pump may be arranged so as to send the coolant Co sucked from the tank 3 to the cyclone separator 22.

[0036]

As described above, according to the present invention, the coolant stored in the tank is used while being circulated to the machine tool, and the coolant is fed to the machine tool through the filter-type removing means. After that, the magnetic removal means removes the machined wastes and collects them in the tank, and in addition to such coolant circulation to the machine tool, the coolant in the tank is fed to the magnetic removal means and returned to the tank. Since this is done, it is possible to effectively remove the machining chips that are fed into the tank without being removed in the process of being returned from the machine tool to the tank. Therefore, the purity of the coolant supplied to the machine tool can be effectively increased,
It is possible to effectively suppress the occurrence of the actual situation that the finish accuracy of the work is affected due to the large content of the work waste as in the conventional device of this type.

In particular, in the above structure, the tank is composed of a main tank and a sub tank for storing the coolant overflowing from the main tank. The sub tank holds the coolant supplied from the main tank to the machine tool. If the reverse feeding means is configured to feed the coolant in the magnetic removal means, the work scraps contained in the coolant are efficiently collected in the sub-tank and fed to the magnetic removal means, This reduces the work scraps contained in the coolant in the main tank. Therefore, the purity of the coolant fed to the machine tool can be increased more effectively.

Further, if the feeding means for feeding the coolant after passing through the magnetic removing means to the main tank is provided and the feeding means is provided with the separating means for separating the work scraps from the coolant, the coolant in the main tank can be removed. It is possible to more effectively reduce the content of the work scraps. In particular, if a cyclone type separating device is used as the separating means and the separated work pieces are fed to the magnetic removing means, it is structurally simple and the removed work pieces are integrally captured by the magnetic removing means. Since they can be collected, it is advantageous in terms of discarding work scraps and the like.

Further, a partition container communicating with the storage coolant is provided in the sub-tank, the coolant after passing through the magnetic removal means is collected in the partition container, and the coolant is sucked up from the partition container. If the feeding means is configured, the work waste can be efficiently collected and removed in the partition container.

Further, as described above, since the machined scraps are often mixed with oil or the like and float on the surface of the stored coolant, the coolant mainly in the surface portion of the coolant stored in the tank is sucked up and magnetically removed. If the reverse feeding means is configured to feed the means, it is possible to more efficiently remove the work scraps in the stored coolant.

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of a coolant circulation system of a machine tool to which a device for removing work scraps according to the present invention is applied.

FIG. 2 is a schematic diagram showing a configuration of a magnetic separator.

FIG. 3 is a schematic sectional view showing a configuration of a Q pot.

FIG. 4 is a schematic view showing a second embodiment of the coolant circulation system of the machine tool to which the device for removing work scraps according to the present invention is applied.

FIG. 5 is a schematic cross-sectional view showing the configuration of a cyclone type separation device.

FIG. 6 is a schematic view showing a modified example of the coolant circulation system of the machine tool to which the device for removing work scraps according to the present invention is applied.

[Explanation of symbols]

 1 Coolant Circulation System 2 Grinding Machine 3 Tank 4 Coolant Supply Passage 5 Coolant Recovery Passage 6, 10 Pump 7 Filtering Device 8 Magnetic Separator 9 Return Passage 11 Q-pot Co Coolant

Claims (6)

[Claims] 1. A filter-type removing means for filtering and collecting foreign matter contained in a coolant supplied from a tank to a machine tool when the coolant stored in the tank is circulated to the machine tool. And a magnetic removing means for adsorbing and collecting the work scraps of the foreign matters contained in the coolant collected from the machine tool, and a reverse feeding for feeding the coolant stored in the tank to the magnetic removing means. A machining tool removing device for coolant for machine tools, characterized in that a feeding means is provided in the circulation path of the coolant. 2. The tank comprises a main tank and a sub tank for storing a coolant overflowing from the main tank, and the coolant is supplied from the main tank to the machine tool while the reverse feeding means is provided in the sub tank. 2. The machine tool removing device for coolant according to claim 1, wherein the coolant inside is supplied to the magnetic removing means. 3. A feeding means for feeding the coolant after passing through the magnetic removing means to the main tank, and a separating means for separating the work scraps from the coolant is provided in the feeding means. The machine tool removal device for a coolant for machine tools according to claim 2. 4. The coolant for machine tools according to claim 3, wherein the separating means is a cyclone type separating device, and is configured to feed the separated work scraps to the magnetic removing means. Machine tool removal device. 5. The sub-tank is provided with a partition container communicating with the storage coolant, and the coolant after passing through the magnetic removal means is collected in the partition container, and the feeding means is provided in the partition container. The machine tool removing device for coolant for machine tools according to claim 3 or 4, wherein the device is configured to suck up the coolant from the inside. 6. The reverse feeding means is configured to suck up mainly the coolant of the surface portion of the coolant stored in the tank and feed it to the magnetic removing means. A machine tool removal device for coolant for machine tools according to any one of claims 1 to 5.