JP2888774B2 - Cutting fluid filtration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting fluid filtering device used for cutting a workpiece on a lathe or the like, and more particularly to a filtering device provided with a rotating cylindrical filter.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional cutting fluid filtering device provided with a rotating cylindrical filter. This filtration device includes a clean chamber 4 and a dirty chamber 3. In FIG. 4, the clean chamber 4 is located on the inner side of the dirty chamber 3. Between the clean chamber 4 and the dirty chamber 3, a partition wall 2 parallel to the plane of FIG. 4 is provided, and the partition wall has an opening 42 communicating the clean chamber 4 and the inside of a cylindrical filter 41 described later.
Is provided.

[0003] A cylindrical filter 41 rotating around an axis 43 is mounted in the dirty chamber 3, and driven sprockets 8 of the chip conveyor 13 are fixed to both side surfaces of the cylindrical filter 41. The chip conveyor 13 is provided with a scraper 12 facing outward at a constant interval between two chains 11 arranged in the front-rear direction in FIG. The sprocket 9 is driven to rotate counterclockwise in FIG. In the lower half of the chip conveyor 13, a bottom plate 14 serving as a chip conveying path is arranged along the chip conveyor 13, and a chip discharge port 15 for discharging chips from the upper end of the bottom plate 14 is provided. ing. A cutting fluid inlet 45 is opened in the side wall of the dirty chamber 3, and the cutting fluid inlet is connected to a cutting fluid outlet of a machine tool such as a lathe.

[0004] Although not shown in FIG. 4, a cutting fluid pump is provided in the clean chamber 4 and supplies filtered cutting fluid to the machine tool. A nozzle pipe branches off from the discharge pipe of the cutting fluid pump via a valve. The nozzle pipe is arranged so as to jet the cutting fluid from the inside to the outside of the cylindrical filter 41.
8 is connected.

[0005] The cutting fluid 33 containing the cutting fluid flowing from the cutting fluid inlet 45 is filtered by the cylindrical filter 41 into the cutting fluid 32, flows into the inside of the cylindrical filter 41, and is further cleaned through the opening 42 of the partition. It flows into the chamber 4.
The swarf captured by the cylindrical filter 41 is removed by the scraper 12 of the chip conveyor from the bottom plate 1 of the dirty chamber.
4. Chip discharge port 1 for chip discharge
5 to the outside of the apparatus. As the chip conveyor 13 rotates, the cylindrical filter 41 also rotates. During the rotation, the chips are washed away by the washing nozzle 18 to prevent clogging of the filter surface.

[0006]

The cutting fluid outlet of the machine tool must be at a low position due to the demand for downsizing the machine and increasing the working space. Therefore, the cutting fluid inlet 45 provided in the cutting fluid filtering device is also at a low position, and the water level of the cutting fluid in the device is low. Therefore, the cylindrical filter 41 can perform a filtering action only in a part of the lower half thereof, and in order to secure a necessary filtering area, the cylindrical filter 41 has to be made large. There is a problem that the capacity is very large.

[0007] When the cylindrical filter 41 is damaged by chips or is clogged and its filtration ability is reduced, it is necessary to replace the filter. There is a problem that it is necessary to pull out and perform replacement work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a small-sized and easily replaceable filter device for cutting fluid.

[0009]

According to a first aspect of the present invention, there is provided a filter for filtering a cutting fluid, wherein a cutting fluid containing cutting chips flows into the dirty chamber.
3 and a clean chamber 4 into which the filtered cutting fluid flows
And a cylinder rotating around a horizontal axis in the dirty chamber 3
A cutting fluid filtration device comprising a filter 5
The cylindrical filter 5 is a regular polygonal cylindrical frame 27;
Flat plate individually mounted on each surface of the outer periphery of the regular polygonal cylinder
Regular polygonal tube filter provided with a filter element 29 of
It is characterized by being.

[0010]

[0011] Filtration devices of the cutting fluid of claim 2, said means
In a filtration device equipped with
An inflow chamber 22 for receiving a liquid;
Pump that pumps up cutting fluid to dirty chamber 3
23 and an opening at a relatively high position of the dirty chamber 3
The cutting fluid in the dirty chamber 3
And an overflow port 25 for returning to the
Things.

[0012]

According to the first aspect of the present invention, there is provided a filtration device comprising a cylindrical filter.
When the filter surface is damaged or clogged
Therefore, when the filtration efficiency is reduced,
Is cylindrical with the filter surface with reduced filtration efficiency as the top surface
Stop the filter 5 and remove the top filter element 29
By replacing the filter, the filter can be repaired.
Wear. Replacing all filter surfaces of a cylindrical filter
If so, put each surface of the polygonal cylindrical peripheral surface one by one on top
To turn the filter element on each side
If you replace it, you can remove the cutting fluid from the
It is possible to exchange Luther.

[0013]

According to the second aspect of the present invention, the machine tool
The cutting fluid containing the cutting chips flowing out of the
Pumped up from chamber 22 to dirty chamber 3
The water level of the cutting fluid in the dirty chamber 3 is
So that the overflow port 25 is connected to the cylindrical filter 5
In relation, opening at a relatively high position
And put a large part of the peripheral surface of the cylindrical filter 5 in the cutting fluid.
Filter of cylindrical filter 5 that can be immersed
Since the use efficiency of the surface is increased, the cylindrical filter 5
The entire device can be made compact. Therefore, the large surface of the cylindrical filter 5 filters the cutting fluid, the filter can be easily maintained and replaced, and the filter surface can be constantly maintained in a state of high filtration efficiency. And a cutting fluid filtering device with good cutting fluid quality can be obtained.

[0015]

1 to 3 show an embodiment of the present invention. The filtration device 1 includes a partition wall 2 as in the conventional structure.
Dirty chamber 3 and clean chamber 4 separated by
In the dirty chamber 3, a regular octagonal cylindrical filter 5 is mounted so as to be freely rotatable around a horizontal axis, and a filtered cutting fluid is machined in the clean chamber 4. A cutting fluid pump 6 for supplying the machine is provided. A short duct 7 provided at the center of the side surface of the tubular filter 5 penetrates through the partition wall 2, and the inside of the tubular filter 5 and the clean chamber 4 are connected by the duct 7. A sprocket 8 of a chip conveyor is fixed to both side surfaces of the cylindrical filter 5, and a chain 11 is wound between the sprocket 8 and a driving sprocket 9 mounted above the dirty chamber. A scraper 12 (see FIG. 2) is mounted between them, and a chip conveyor 13 is formed. The bottom plate 14 of the dirty chamber 3 has a shape along the chip conveyor 13, and is provided with a chip discharge port 15 communicating with the upper end thereof.

A cleaning nozzle 18 is connected to a tip of a nozzle pipe 17 branched from a discharge pipe 16 of the cutting fluid pump 6, and the cleaning nozzle 18 extends from the inner surface to the outer surface of the cylindrical filter 5. The filtered cutting fluid is ejected to clean the filter surface of the cylindrical filter. The above configuration is the same as that of the conventional cutting fluid filtering device.

Below the cutting fluid outlet 21 of the machine tool 19, an inflow chamber 22 for receiving the flowing cutting fluid is provided. A solid substance pump 23 is provided in the inflow chamber 22, and the tip of the discharge pipe 24 is opened at a position slightly higher than the intermediate height of the dirty chamber 3. On the side wall of the dirty chamber 3, an overflow port 25 is opened at a position slightly lower than the upper end of the cylindrical filter 5, and a tip of an overflow pipe 26 extending from the overflow port is
It is open to the inflow chamber 22.

The cylindrical filter 5 is, as shown in FIG.
It is composed of a regular polygonal cylindrical frame 27 and a flat filter element 29 with a rectangular frame 28 which is individually mounted on each of the polygonal cylindrical frame 27 and the outer peripheral surface forming the polygon. . Each filter element 29 has its square frame 2
8 is fixed to the frame 27 with screws 31.

In the filtering device having the above structure, the machine tool 1
The cutting fluid 33 containing the cuttings 32 flowing out of 9 flows into the inflow chamber 22, and the cutting fluid containing the cuttings in the inflow chamber 22 is pumped up to the dirty chamber 3 by the pump 23. As the pump 23, a vortex or jet pump used for transporting a slurry or a solid is used. In this type of pump, the impeller or the like is not exposed in the flow path of the carrier fluid, and only the flow is generated in the flow path.
It is possible to prevent the impeller of the pump from being worn or damaged by the conveyed chips 32.

The cutting fluid flowing into the dirty chamber 3
Filtered by the cylindrical filter 5, the cylindrical filter 5
The filtered cutting fluid that has flowed into the inside of the container gets the duct 7 and flows into the clean chamber 4, and is again supplied to the machine tool by the cutting fluid pump 6. The discharge amount of the pump 23 in the inflow chamber is set slightly larger than the discharge amount of the cutting fluid pump 6 in the clean chamber, and excess cutting fluid is returned from the overflow port 25 to the inflow chamber 22. Therefore, the level of the cutting fluid in the dirty chamber 3 and the clean chamber 4 is maintained at the opening height of the overflow port 25.

The cylindrical filter 5 includes a dirty chamber 3
In the inside, and a large part of its peripheral surface is immersed in the cutting fluid. Therefore, most of the filter surface of the cylindrical filter 5 actually performs a filtering action, and a necessary filtering area can be secured even if the cylindrical filter 5 is small. The cylindrical filter 5 includes the dirty chamber 3
2, along with the chip conveyor 13 that is driven to rotate clockwise in FIG.
It rotates slowly, and is washed by filtered cutting fluid jetted from the washing nozzle 18 during the rotation. Chips captured by the cylindrical filter 5 and accumulated at the bottom of the dirty chamber 3 are scraped up by the scraper 12 of the chip conveyor, and are discharged from the discharge port 15 to the outside of the apparatus.

When the filter element 29 on the peripheral surface of the cylindrical filter 5 is damaged or clogged, the chip conveyor 13 is stopped by setting the filter element to an upper position, and stopping the filter element. Replace 29.

[0023]

According to the present invention described above, the size of the cylindrical filter incorporated in the filtration device can be reduced, and thus the entire device can be reduced in size. In addition, the filter can be easily replaced or repaired, and the filter surface can be maintained in an efficient state. Therefore, there is an effect that a compact and high-efficiency cutting fluid filtering device can be provided.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment.

FIG. 2 is a front view of the apparatus of FIG. 1;

FIG. 3 is a partially exploded perspective view showing a cylindrical filter.

FIG. 4 is a front view of a conventional device.

[Explanation of symbols]

 3 Dirty chamber 4 Clean chamber 5 Cylindrical filter 22 Inflow chamber 23 Pump for solid matter 25 Overflow port 27 Frame 29 Filter element

Claims (2)

(57) [Claims] 1. A dirty chamber (3) into which a cutting fluid containing chips flows, a clean chamber (4) into which a filtered cutting fluid flows, and a cylinder rotating around a horizontal axis in the dirty chamber (3). In a cutting fluid filtering device provided with a cylindrical filter (5) , the cylindrical filter (5) is provided with a regular polygonal cylindrical frame (27).
A flat plate attached individually to each surface of the outer periphery of the regular polygonal cylinder
Regular polygonal tube filter with filter element (29)
A filtering device for cutting fluid , characterized in that: 2. A flow for receiving a cutting fluid flowing out of a machine tool.
The cutting fluid in the inlet chamber (22) and the inflow chamber (22).
Pump (23) to pump up to the
Open at a relatively high position in the dirty chamber (3)
The cutting fluid in the cutting chamber (3) is returned to the inflow chamber (22).
The cutting fluid filtering device according to claim 1, further comprising an overflow port (25) .