JPH04358508A - Filter device for soil liquid and processing liquid filter device for processing machine - Google Patents

Abstract

PURPOSE:To reduce the running cost by improving the life of a discharging device of simple structure and high filter efficiency and a processing liquid filter and providing a processing liquid filter device of a processing machine which can reduce the frequency of replacement of processing liquid filter and increase the working efficiency. CONSTITUTION:A filter device for soil water is provided with a sheet-shaped filter medium 31 fed continuously, a soil liquid feeding means 39 for feeding the soil liquid to the filter medium 31 and a pressure difference generating means for generating the pressure difference between the upper face side and the lower face side of the filter medium 31. Said device also works as a processing liquid filter device of a processing machine provided with filter medium 31, a soil liquid feeding means 39, a pressure difference generating means and a returning means for returning the processed filtrate having passed through the filter medium 31 by the pressure difference to a filter liquid tank. Its structure is simple and its filter efficiency is high. The device makes the life of a filter longer to reduce the running cost. The device also reduces the frequency of replacement of filters to increase the operation factor.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a waste liquid filtration device and a processing liquid filtration device for a processing machine, and more specifically, it extends the life of filter media, significantly reduces the running cost of the filtration device, and The present invention relates to a sewage filtration device and a machining fluid filtration device for a processing machine, which increase the operating rate and are easy to maintain.

0002

2. Description of the Related Art FIG. 36 is a block diagram showing an example of a machining fluid filtration device for a conventional wire electric discharge machine, FIG. 37 is a partial sectional view showing the construction of the machining fluid filter, and FIG. 38 is a plan view. In the figure, 1 is a wire electrode, 2 is a workpiece, and 3 is a machining tank of an electrical discharge machine, with a drain pipe 3a provided at the bottom. Reference numeral 4 denotes a machining fluid filtration device installed below the machining tank 3 and consisting of a sewage tank 5 for storing machining sewage and a clean fluid tank 6 for storing filtered clean machining fluid; The installed machining fluid filter 7 and the waste liquid tank 5 are connected through a pipe 8. 9 is a filtration pump provided on the pipe 8, and 10 is a pressure gauge for detecting the pressure inside the processing fluid filter 7. Reference numerals 11 and 12 designate machining fluid nozzles of the electrical discharge machine that are arranged opposite each other and communicate with the cleaning tank 6 through a pipe 13. The pipe 13 is provided with a machining fluid supply pump 14.

Details of the machining fluid filter 7 are shown in FIGS. 37 and 3.
8. This machining fluid filter 7 is, for example,
As disclosed in Japanese Patent Publication No. 73234, a filter medium 18 is sandwiched between double-structured cylindrical punch metals 15 and 16 having a large number of machining liquid passage holes 17 in the side wall surface, and the upper and lower ends thereof are It has a structure in which it is sandwiched between plates 19 and 20 having a hole in the center. In this machining fluid filter 7, holes provided in plates 19 and 20 are fitted into a cylindrical shaft 21 having a large number of small holes 22 in the side wall surface, and packings 23 and 2
3a, and is fixed to a shaft fixing base 25 with a nut 24. In addition, the cylindrical shaft 21
is connected to the pipe 8, and the machining fluid filter 7
is normally placed in a clean tank 6 and immersed in clean machining fluid.

Next, the operation of a wire electric discharge machine equipped with the machining fluid filter as described above will be explained. A wire electric discharge machine applies a voltage between a wire electrode 1 inserted into a machining hole of a workpiece 2 and the workpiece 2, and a machining liquid nozzle 1
A discharge is generated while supplying machining fluid between 1 and 12 (between the machining holes), and the workpiece 2 is machined by the discharge energy, and the size of the workpiece 2 is several μm to several tens of μm due to machining.
Approximately spherical processing waste is generated. The presence of this machining debris causes unstable machining such as secondary discharge and concentrated discharge, and disconnection of the wire electrode 1, so in order to perform stable machining, the machining fluid supplied between the machining holes must be clean. There must be.

The supply pump 14 sends the machining fluid from the cleaning tank 6 through the pipe 13 to the machining fluid nozzles 11 and 12, and the machining fluid supplied between the machining holes becomes machining waste containing machining waste and flows into the machining tank 3. It is discharged from the drain pipe 3a and collected in the waste liquid tank 5 of the processing liquid filtration device 4. Then, the processed sewage is transferred from the sewage tank 5 to the processed liquid filter 7 by the filtration pump 9.
It enters the filter medium 18 through the small hole 22 of the cylindrical shaft 21 through the machining liquid passage hole 17 of the inner punch metal 15, is filtered by the filter medium 18, and passes through the outer punch metal 16.
The machining liquid is discharged from the machining liquid passage hole 17 and stored in the clear liquid tank 6. Then, the machining fluid is again supplied between the poles by the supply pump 14, and in this way, the machining fluid is circulated and regenerated. In addition,
Normally, the amount of machining fluid filtered by the machining fluid filter 7 is greater than the amount of machining fluid supplied between the poles, so the clean machining fluid in the clean fluid tank 6 overflows into the dirty fluid tank 5. There is.

If the filter medium 18 becomes clogged and the internal pressure of the machining liquid filter 7 increases to exceed the tensile strength of the filter medium 18, the filter medium 18 will rupture.
The internal pressure of the filter is monitored, and when the pressure reaches a predetermined value, the filter medium 18 is replaced.

[0007]

[Problems to be Solved by the Invention] The machining fluid filtration device of the conventional electric discharge machine is constructed as described above, and the machining fluid containing machining waste having a relatively large particle size is sent to the machining fluid filter 7. Therefore, the filter medium 18 becomes clogged quickly and must be replaced each time, resulting in a problem of high running costs. In addition, when replacing the filter medium 18, the machining fluid filter 7 immersed in the clean liquid tank 6 must be removed. There is also the problem that the liquid gets mixed in the liquid tank 6, and machining cannot be performed until the liquid tank 6 is clean, and only filtration has to be performed, which significantly lowers the operating rate of the electric discharge machine.

For this reason, in order to extend the life of the filter medium, a settling tank 5a is provided adjacent to and communicating with the sewage tank 5, as shown in FIG. There is a method in which processing waste is first stored in a sedimentation tank 5a, and then transferred to a waste tank 5 after settling.
(Refer to Publication No.-73235).

However, in such a device, processing waste with a large particle size settles relatively well, so the filter medium 18
Although the service life of the machine will be extended, it will eventually become ineffective if the settled processing debris is not periodically removed. However, since processing fluid and processing waste must be treated as industrial waste, they cannot be disposed of into sewers, etc., and another problem arises: they are difficult to maintain and handle because of their extremely high moisture content. Furthermore, if the machining fluid in the settling tank 5a is removed, the machining fluid becomes insufficient and must be replenished, which increases costs. Management is troublesome.

The present invention has been made to solve the above-mentioned problems, and provides a sewage filtration device that has a simple structure and high filtration efficiency, extends the life of the processed fluid filter, and reduces running costs. The purpose of the present invention is to provide a machining fluid filtration device for a machining machine that reduces the frequency of machining fluid filter replacement and improves the operating rate of the machining machine, and that is also easy to maintain and allows for immediate response to abnormalities that occur. This is what I did.

[0011]

[Means for Solving the Problems] A filtration device for sewage according to the present invention includes: (1) A filtration device that filters and reuses sewage, including a sheet-like filter medium that is continuously supplied; and a pressure difference generating means for generating a pressure difference between the upper surface side and the lower surface side of the filter medium.

(2) In a filtration device that filters and reuses waste liquid through a filter installed in the filtration device, a sheet-like filter medium provided outside the filtration device and continuously supplied; A sewage supply means for supplying sewage, a pressure difference generation means for generating a pressure difference between the upper surface side and the lower surface side of the filter medium, and a selection means for filtering the sewage only by the filter for a predetermined period. What you have, and

(3) The apparatus of (1) and (2) above, which is equipped with a detection means for detecting the presence or absence of the filter medium and/or the remaining amount thereof;

(4) The apparatus of (1) to (3) above, which is equipped with a control means for controlling the feeding rate of the filter medium,

(5) The apparatus of (1) to (4) above, further comprising a control means for controlling the pressure difference between the upper surface and the lower surface of the filter medium.

(6) In the devices of (1) to (5) above, the suction section of the pressure difference generating means is divided into a plurality of sections, and means is provided for changing the pressure difference of each suction section.

Further, the processing fluid filtration device for a processing machine according to the present invention has the following features: (1) A processing fluid filtration device for a processing machine that filters and reuses processing fluid generated by processing a workpiece. a sheet-shaped filter medium supplied to the filter medium, a processed sewage supply means for supplying the processed sewage liquid to the filter medium, and a pressure difference generating means for generating a pressure difference between the upper surface side and the lower surface side of the filter medium; and a return means for returning the processed filtrate that has passed through the filter medium to the filtrate tank due to the pressure difference,

[0018] In the above apparatus, (2) the processed sewage supply means receives processed sewage from the processing machine;

(3) The processing sewage supply means takes in the processing sewage discharged from the processing machine to the processing sewage tank;

(4) The processed sewage supply means is provided with a path for supplying the processed sewage from the processing machine to the filter medium, a path for flowing the processed sewage into the processed sewage tank, and a switching means for switching between these two paths; moreover,

(5) In a machining fluid filtration device for a processing machine in which the machining fluid generated by machining a workpiece is filtered and reused by a filter installed in the filter, a continuous a sheet-shaped filter medium supplied to the filter medium, a processed sewage supply means for supplying the processed sewage liquid to the filter medium, and a pressure difference generating means for generating a pressure difference between the upper surface side and the lower surface side of the filter medium; A device comprising a return means for returning the machining filtrate that has passed through the filter medium due to the pressure difference to the filter, and a selection means for filtering the machining fluid only through the filter for a predetermined period;
as well as

(6) The apparatus of (1) to (5) above, which is equipped with a detection means for detecting the presence or absence of the filter medium and/or the remaining amount thereof;

(7) The apparatus of (1) to (6) above is provided with a control means for controlling the feeding rate of the filter medium.

(8) The apparatus of (1) to (7) above, which is equipped with a control means for controlling the pressure difference between the upper surface side and the lower surface side of the filter medium.

(9) In the apparatus of (1) to (8) above, the suction part of the pressure generating means is divided into a plurality of parts, and the apparatus is equipped with means for changing the pressure difference between each suction part.

(10) In the apparatus of (1) above, a plurality of filtration devices each consisting of a filter medium, a processing fluid supply means, and a pressure difference generation means are installed in upper and lower stages, and the processing filtrate is supplied to the lowest filtration device. A return means is provided.

[0027]

[Operation] In the sewage filtering apparatus according to the present invention, the sewage supplied to the filter medium by the sewage supply means passes through the filter medium due to the pressure difference generated between the upper surface side and the lower surface side of the filter medium. At this time, foreign substances contained in the filtrate are captured by the filter medium, resulting in a clean liquid. On the other hand, since the filter medium is continuously supplied, no clogging occurs and stable filtration is always performed.

[0028] Furthermore, when a filter is provided in the filter, not only can the life of the filter be extended, but also the filter can be pre-coated by stopping filtration with the filter medium for a predetermined period of time and filtering the waste liquid only with the filter. Do the following.

Furthermore, by detecting the presence or absence of the filter medium and its remaining amount, or by controlling the feed rate of the filter medium, the filter medium can be supplied without undue stress or waste, and the dirty liquid can be filtered.

[0030] Furthermore, by controlling the pressure difference between the upper surface side and the lower surface side of the filter medium, or by dividing the suction section of the pressure difference generating means into a plurality of parts and providing means for changing the pressure difference between each suction section, the filthy liquid can be reduced. can be filtered more cleanly.

Further, in the machining fluid filtration device for a processing machine according to the present invention, the machining fluid supplied from the machining machine or the machining fluid tank by the machining fluid supply means has machining wastes captured by a sheet-like filter medium, and The processed filtrate that has passed through the filter medium is transferred to a clear liquid tank or a processed waste liquid tank.

Further, when a filter is provided in the filter, the filter is precoated by stopping filtration by the filter medium for a predetermined period of time and filtering the dirty liquid only by the filter.

[0033] Furthermore, a route for supplying processed sewage to the filter medium,
If a path for flowing processed sewage liquid into the processed sewage tank and a means for switching between these two routes are provided, a large amount of processed sewage may be discharged from the processing machine, the filter medium may run out, or an abnormality may occur in the differential pressure generating means. When this occurs, the switching means switches the route to the processed sewage tank side, and the supply of processed sewage to the filter medium is stopped.

[0034] Furthermore, by detecting the presence or absence of the filter medium and its remaining amount, or by controlling the supply speed of the filter medium, the filter medium can be supplied without undue stress or waste, and the dirty liquid can be filtered.

Furthermore, a means for controlling the pressure difference between the upper surface side and the lower surface side of the filter medium, or dividing the suction section of the pressure generating means into a plurality of sections and changing the pressure difference between each suction section, or a filtering device is provided. By installing multiple stages above and below, processing waste liquid can be filtered more cleanly.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a plan view of its essential parts. Note that the same parts as in the conventional example explained in FIG. 36 are denoted by the same reference numerals, and the explanation will be omitted.

In the figure, 30 is a filtering device, 31 is a sheet-like filter material made of filter paper, non-woven fabric, etc., which is wound into a roll and set in the supply section, and 32 is driven by a motor 33 to feed a suction section 34. This is a winding roll that winds up the filter medium 31 that has passed through it. 36 is a box provided at the lower part of the suction part 34 and having a mesh surface 35 formed on the upper surface, and the filter medium 31 is sent in contact with the mesh surface 35. 37 is box 36
The blower is connected to the pipe 38 and opens onto the cleaning tank 6. In this embodiment, a Nash blower, for example, which can suck both liquid and gas, is used. Note that the motor 33 and blower 37 that drive the take-up roll 32 are interlocked with the supply pump 14. 39 is a processing sewage supply device, which includes a hose 40 connected to the drain pipe 3a of the processing tank 3;
It consists of a disperser 41 that disperses processed waste liquid onto a filter medium 31.

Next, the operation of this embodiment configured as described above will be explained. When machining is started and machining fluid is supplied between the poles, the motor 33 is activated and the filter medium 31 is moved onto the winding roll 3.
2 and the mesh surface 3 of the suction part 34 at a predetermined speed.
Move over 5. At this time, the blower 37 also starts operating. Processing waste containing processing debris generated between the machining plates during processing is led from the processing tank 3 to the hose 40 via the drain pipe 3a, and is dispersed and discharged onto the mesh surface 35 by the disperser 41. Inside the box 36 provided under the mesh surface 35 is the blower 3.
7, the processed waste liquid is sucked into the box 36 through the filter medium 31 together with air. At this time, among the processed waste contained in the processed waste liquid, those larger than the mesh of the filter medium 31 cannot pass through the filter medium 31.
captured by Since the filter medium 31 is wound and moved at a predetermined speed, no clogging occurs, and stable filtration is always performed in the same state.

The machining filtrate from which machining debris has been removed by filtering through the filter medium 31 is regenerated into a clean machining fluid with almost no machining debris, and is returned to the clean liquid tank 6 by the blower 37.

The used filter medium 31 wound up on the take-up roll 32 is sucked by the suction device 37 and contains almost no liquid, so it is extremely easy to dispose of it. Incineration is also possible.

In the above explanation, the case where the machining liquid filtered by the filtration device 30 is returned to the cleaning tank 6 was explained, but when the machining waste is large as when rough machining the workpiece, Since most of the debris is captured by the filter medium 31 and a clean machining fluid is obtained, there is no particular problem. but,
When processing waste is fine, such as during finishing processing, the filter medium 31 may not be able to sufficiently filter the waste. In such a case, the machining fluid filtered by the filtration device 30 may be supplied to the filter 7 of the machining fluid filter 4 as shown in FIG. 36, and may be further filtered by this filter 7.

FIG. 3 is a block diagram of a second embodiment of the present invention, and FIG. 4 is a plan view thereof. 43 is an endless mesh member having a belt 44 having sprocket holes on both sides of a mesh surface 35, which is disposed between the sheet filter medium 31 and the box 36, and is moved in the direction of the arrow by a sprocket 45 driven by a motor 33a. Run to. 42 is a box that accommodates the used filter medium 31.

In this embodiment as described above, when machining is started, the mesh member 43 is driven by the sprocket 45 and moves in the direction of the arrow. At this time, the filter medium 31 is sucked by the blower 37, and the suction force causes the mesh member 43 to
As the mesh member 43 moves, the filter medium 31 also moves in the direction of the arrow, and the used filter medium 31 is placed in the box 42.
It falls inside and is contained. Note that the used filter medium 31 may be wound up on a winding roll.

In the embodiments described above, the top surface of the box 36 may be open or may be provided with a mesh surface 35. Furthermore, in order to improve the sliding of the mesh member 43 as it travels, it may be arranged at a distance from the box 36, or rollers may be arranged between the two.

FIG. 5 is a block diagram of a third embodiment of the present invention, and FIG. 6 is a plan view of its main parts. In the first and second embodiments (FIGS. 1 to 4) described above, the blower 37 that can suck both gas and liquid was used, but this embodiment sucks only gas like the Roots blower. A blower 37a is used. In this embodiment, the processing liquid filtration device 4
A processing sewage tank 47 communicating with the sewage tank 5 is installed close to the sewage tank 5, and a gas-liquid separation tower 46 is provided, a part of which is inserted into the tank 5, and the suction side of the blower 37a is It is connected to the upper part of the liquid separation tower 46, and the box 36 and the upper part 7 of the gas-liquid separation tower 46 (lower than the connection part with the blower 37a) 7 are connected by a pipe 38a.

In this embodiment configured as described above,
The processing sewage and air in the box 36 are guided to the upper part of the gas-liquid separation tower 46 by the suction of the blower 37a, the processing sewage falls into the processing sewage sump 47 due to its own weight, and the air
It is discharged from the blowing side of 7a. The machining fluid collected in the machining fluid reservoir 47 flows into the dirty fluid tank 5 and is recycled into clean machining fluid by the machining fluid filter 7.

FIG. 7 is a block diagram of a fourth embodiment of the present invention, and FIG. 8 is a plan view of its main parts. In this embodiment, the drain pipe 3a of the processing tank 3 is opened onto the dirty liquid tank 5, and the processing tank 3 is
The processed sewage from the pipe 48 flows into the sewage tank 5, and one end is immersed in the sewage tank 5 using the pump 4.
9 is connected, and the other end is connected to a distributor 41 provided above the suction section 34.

In this embodiment configured as described above,
When the operation of the machining liquid filtration device 4 is instructed, the motor 33 is driven, the filter medium 31 is wound up on the winding roll 32, moves on the mesh surface 35 of the suction part 34 at a predetermined speed, and the blower 37 And the suction pump 49 also starts operating. Processing sewage containing processing debris generated between the machining holes due to processing flows into the sewage tank 5 from the drain pipe 3a. On the other hand, the pump 49 pumps up the processed sewage in the sewage tank 5, and the pipe 48
It is sent to a disperser 41 via a filter, and dispersed and discharged onto a filter medium 31. The processing liquid from which large processing debris has been removed by the filter medium 31 is returned to the waste liquid tank 5 through the pipe 38, and is regenerated into clean processing liquid in the clean liquid tank 6 by the action explained in the conventional example of FIG. 36 below. Ru.

In the above explanation, the processed filtrate filtered by the filtration device 30 is returned to the waste liquid tank 5 and is supplied to the filter 7 by the filtration pump 9. The processing filtrate may be returned to the cleaning tank 5 as explained in 1 and Fig. 2), or the processing filtrate may be supplied to the filter 7 for further filtration as shown by the broken line in Fig. 7. Good too.

FIGS. 9 and 10 show a fifth embodiment of the present invention. In this embodiment, the processed sewage generated by processing flows into the sewage tank 5, and the processed sewage pumped up from the sewage tank 5 by the pump 49 is supplied to the disperser 41 via the pipe 48. The functions of the filtration device 30 and the gas-liquid separation tower 46 are similar to those of the third embodiment (FIGS. 5 and 6).
The same is true for .

FIGS. 11 and 12 show a sixth embodiment of the present invention, in which the processed waste liquid from the processing tank 3 is made to flow into the waste liquid tank 5, and a pipe 48 having a pump 49 and an air The liquid separation tower 46 is immersed in the waste liquid of the waste liquid tank 5.

FIGS. 13 and 14 show a seventh embodiment of the present invention, and the processing fluid filtration device 4 and filtration device 30 are the same as in the fourth embodiment (FIGS. 7 and 8). be. Reference numeral 50 denotes a partition plate installed in the machining tank 3, and an opening 50a is provided at the bottom so that the machining fluid can move. A gate 51 is driven by a cylinder 52 which is activated by a signal from a control device (not shown) of the electric discharge machine, and opens and closes the opening 50a of the partition plate 50. 53 is a pipe connected to the drain pipe 3a of the processing tank 3, one end of which opens into the waste tank 5, and the other end connected to the distributor 41 on the filter medium 31 of the suction section 34; There are solenoid valves 5 on both sides of the connection with
4,55 are provided.

Reference numeral 56 denotes a path switching controller connected to the control device of the electrical discharge machine, which includes a light sensor 58 such as a transmission type or reflection type arranged on the filter medium 31 and a suction sensor installed on the pipe 38. A signal from a negative pressure gauge 59 that measures the negative pressure generated in the device 30 is applied, and its output signal is applied to the solenoid valves 54 and 55.

Next, the operation of this embodiment configured as described above will be explained. When machining is started and machining fluid is supplied between the poles, the motor 33 is activated and the filter medium 31 is moved onto the winding roll 3.
2 and the mesh surface 3 of the suction part 34 at a predetermined speed.
5, and the blower 37 also starts operating. During normal machining, the solenoid valve 54 is open and the solenoid valve 55 is closed, and the machining liquid containing machining waste generated between the machining poles is passed from the drain pipe 3a through the solenoid valve 54 to the disperser. 41, and is dispersed and discharged onto the filter medium 31. Mesh surface 35
Since the inside of the box 36 placed below is under negative pressure by the blower 37, the processed waste liquid flows into the filter medium 3 along with the air.
1 and is sucked into the box 36. At this time,
Among processing debris in the processed waste liquid, those larger than the mesh of the filter medium 31 cannot pass through the filter medium 31 and are captured by the filter medium 31. Since the filter medium 31 is moving, no clogging occurs, and filtration is always performed stably in the same state. The filtration action of the processed waste liquid stored in the waste liquid tank 5 is as described above.

By the way, for example, in a wire electric discharge machine (example shown in FIG. 13) which performs machining by immersing the workpiece 2 in a machining fluid, the gate 51 is closed during normal machining, and the partition plate 50 is closed. Processing sewage that has overflowed is discharged from the drain pipe 3a. However, for setup purposes, it may be necessary to discharge all of the machining fluid accumulated in the machining tank 3, and in this case, the gate 51 is opened by a command from the control device or by manual operation. As a result, several times to several tens of times as much machining fluid as during machining is discharged, which cannot be processed by the filtration device 30. Therefore, in such a case, the solenoid valve 54 is closed and the solenoid valve 55 is opened based on a command from the controller 56, and the processed sewage is directly discharged to the sewage tank 5 via the drain pipe 3a and the pipe 53. do.

[0056] Furthermore, if the suction force of the blower 37 decreases for some reason, the filter medium 31 disappears, etc., the filtration device 3
If an abnormality occurs in the
Since the presence or absence of the filter medium 31 can be detected by the optical sensor 58,
This detected abnormality signal is sent to the controller 56, and the solenoid valve 54
, 55 to directly discharge the processed waste liquid to the waste liquid tank 5.

[0057] In the above explanation, the solenoid valves 54 and 55 are used as means for switching the route of processed sewage, but
Other automatic or manual switching means may also be used. In addition, although a case has been shown in which a negative pressure gauge 59 is installed in the pipe 38 to detect the suction force of the blower 37, for example, a float switch is installed in the box 36, and when the suction force decreases and the sewage level rises, Other means may also be used, such as raising the float switch accordingly and sending a signal to the controller 56 to reduce the suction force.

Further, although the presence or absence of the filter medium 31 is detected by the optical sensor 58, other means may be used, such as, for example, attaching an encoder to the shaft of the supply roll of the filter medium 31 and detecting its rotation. In addition to these, the filtration device 30
An overflow of processing sewage, a stoppage of movement of the filter medium 31, etc. may be detected and sent to the controller 56, and the route of processing sewage may be switched.

FIGS. 15 and 16 show an eighth embodiment of the present invention, in which the processing fluid filtration device 4 and the filtration device 30 are
This is the same as in the embodiments (FIGS. 7 and 8). Reference numeral 61 denotes an encoder attached to the winding roll 32, the output signal of which is applied to the counter 62, and the count value of the counter 62 is displayed on the display 63. Reference numeral 56 denotes a controller to which an output signal from an optical sensor 65, which is disposed opposite to the filter medium 31 and detects the presence or absence of the filter medium 31, is added, and a corresponding signal is output to the pumping pump 49, and the output signal is sent to the processing machine control device. added to.

Incidentally, in each of the embodiments described above, even when the sheet-like filter medium 31 is used up, the filtration device 30 continues to operate as it is, and the processing waste liquid is sent to the clean liquid tank 6 without being filtered. In the case of a wire electrical discharge machine, if machining continues without the machining fluid being filtered, secondary discharge or concentrated discharge may occur due to machining debris in the machining fluid, causing wire electrode breakage, so stable machining cannot be achieved. This causes the inconvenience of not being able to do so.

Furthermore, since there is no means to check the remaining usable amount or usable time of the filter medium 31, the operator cannot accurately know when it is time to replace the filter medium 31, and it is difficult to check the presence or absence of the filter medium 31 during processing. I have to check it many times.

In this embodiment, the rotation of the take-up roll 32 is detected by an encoder 61, and the amount used or remaining of the filter medium 31 is calculated by a counter 62 and displayed on a display 63. Further, the optical sensor 65 detects the presence or absence of the filter medium 31, and when it detects that the filter medium 31 is no longer present, the signal is sent to the controller 56 to immediately stop the pump 49, and the signal is sent to the processing machine control device. The motor 33 and blower 37 are stopped. In this case, even if the filtration device 30 is stopped, the processing fluid filter 7 is still filtering the processing fluid, so it is possible to set a new filter medium 31 and restart the filtration device 30 without interrupting processing. Can be done.

FIGS. 17 and 18 show a ninth embodiment of the present invention. In this embodiment, the dirty liquid tank 5 is installed at a position apart from the clean liquid tank 6, and a processing liquid filter is not provided, but the filtration device 30 is provided in the fourth embodiment (FIGS. 7 and 8). The same is true for . 66a and 66b are rollers made of a conductive material, and are arranged opposite to each other with the filter medium 31 in between.
The output of the controller 56 is sent to the blower 37, the lift pump 49, and the processing machine control device (not shown). 61 is an encoder attached to one roller 66a;
62 is a counter, and 63 is a display.

In this embodiment, the rollers 66a, 66b
When the filter medium 31 is present between them, both rollers 66a and 66b are in an insulated state, but when the filter medium 31 is no longer present, both rollers 66a and 66b are brought into contact and are in a conductive state. Therefore, the controller 56 determines the presence or absence of the filter medium 31 (the presence or absence of conductivity), and if the filter medium 31 is not present, the blower 37 and the pump 4
9 and sends a signal to the processing machine control device to stop processing.

Furthermore, the feed amount of the filter medium 31 can be determined by the encoder 61. Furthermore, information on the remaining machining time can be taken in from the processing machine control device, and the length of the filter medium 31 required for machining can be estimated and displayed from that value. Also, the estimated required amount of filter medium 31 and the encoder 6
It is also possible to compare the remaining amount of the filter medium 31 detected in step 1 and, when it is determined that the filter medium 31 is insufficient, issue an alarm to prompt the filter medium 31 to be replaced.

FIGS. 19 and 20 show a tenth embodiment of the present invention, and the structure of the filtering device 30 is the same as that of the second embodiment (FIGS. 3 and 4). Reference numeral 65 is an optical sensor placed close to the filter medium 31, 67 is an electromagnetic valve provided in the middle of the waste liquid pipe 3a, and 56 is a controller.The output signal of the optical sensor 65 is applied to the controller 56, and the controller The output signal of 56 is sent to a solenoid valve 67 and a processing machine control device (not shown). 61
is an encoder attached to the motor 33a that drives the sprocket 45; 62 is a counter; 63 is a display; 68
is an alarm.

Now, when the optical sensor 65 detects that there is no filter medium 31, the signal is sent to the controller 56, which closes the solenoid valve 67 and sends a signal to the processing machine control device to control the processing machine. Processing is stopped and the filter medium 31 is replaced.

On the other hand, the supply amount of the filter medium 31 is determined by the encoder 61 and the counter 62, and when the amount of the filter medium 31 becomes less than a certain amount, the alarm 68 sounds a buzzer or lights up a warning light. If the warning light is a revolving light, it will be easier for the operator to confirm the situation.

In the above description, the presence or absence of the filter medium 31 and the remaining amount thereof are detected using the encoder 61, the optical sensor 65, or the conductive rollers 66a and 66b, but other means may be used.

FIGS. 21 and 22 are explanatory diagrams of an eleventh embodiment of the present invention, and its configuration is almost the same as that of the first embodiment. In this embodiment, the motor 33a that drives the take-up roll 32 is a variable speed motor whose speed is controlled by a controller 56, and the speed command to the variable motor 33a is given by a program command from the processing machine control device 70 or by a program command from the processing machine control device 70. This is done manually.

In electric discharge machining, the amount of machining debris generated between the machining machining parts per unit time is proportional to the input machining energy. The machining energy is determined by setting the parameters of the machining power source (not shown), such as the applied voltage value, current pulse width, current peak value, and pause time, according to the purpose. A command is sent to the power source. These parameters are determined based on the material of the workpiece 2, the plate thickness, the diameter of the wire electrode 1, the desired machining speed, etc., and the data is numbered as an electrical condition sequence and stored in the processing machine control device 70. . Therefore, by calling the number corresponding to a desired electrical condition sequence in the machining program, that electrical condition sequence is automatically set and machining is performed. The speed of the variable speed motor 33a is defined as one of the parameters of this electrical condition string, and when sending the electrical condition parameters to the processing power source, the variable speed motor 33
A speed command is sent to the controller 56 of a. Variable speed motor 33a
The value of the speed can be determined from the amount of processing waste generated due to the electrical condition sequence and the trapping ability of the filter medium 31, or can be determined experimentally. Of course, the speed command may be sent directly to the controller 56 manually.

In this embodiment, the filter medium 31 is wound and moved at a speed determined by the above-mentioned parameters, so that no clogging occurs and stable filtration can be performed in the same state at all times.

FIGS. 23 and 24 show a twelfth embodiment of the present invention, in which an optical sensor 65 is provided close to the drain pipe 3a, and its output signal is applied to the controller 56. It is. The optical sensor 65 detects the degree of contamination of the processed wastewater passing through the drain pipe 3a, and outputs it to the controller 56. When the degree of pollution is high, there is a lot of processing waste in the processing waste, so filter medium 3
The controller 71 controls the variable speed motor 33 so that the motor 1 does not become clogged.
The variable speed motor 33 is set to a high speed to save the filter material 31 since there is less processing waste when the degree of pollution is low.
Set the speed of a low.

FIGS. 25 and 26 show a thirteenth embodiment of the present invention. In this embodiment, an optical sensor 65 is installed on the downstream side of the box 36 to detect the degree of clogging of the used filter medium 31. The output signal is sent to a controller 56.

In this embodiment, a reference value for the optimal degree of clogging of the filter medium 31 is set in advance in the controller 71, and the speed of the variable speed motor 33a is adjusted so that the output of the optical sensor 65 approaches the reference value. is controlled so that the filter medium 31 is supplied without strain or waste.

FIGS. 27 and 28 show a fourteenth embodiment of the present invention, in which a negative pressure gauge 72 for measuring the negative pressure inside the box 36 is provided in the pipe 38, and its output is applied to the controller 56. be.

In this embodiment, if the speed of the variable motor 33a does not correspond to the amount of processing waste in the processing waste and is too low,
When the filter medium 31 becomes clogged, the negative pressure inside the box 36 increases, and if the amount of processing waste is small and the filter medium 31 is not clogged, the amount of air sucked increases and the negative pressure decreases. By presetting a reference value for the optimum negative pressure (that is, a moderate clogging state) in the controller 56, and controlling the speed of the variable speed motor 33a so that the output of the negative pressure gauge 72 approaches the reference value, , the filter medium 31 can be supplied without waste.

Note that the third (FIGS. 5 and 6) and fourth (FIGS. 7 and 6)
Figure 8), fifth (Figure 9, Figure 10), sixth (Figure 11, Figure 12)
) and the seventh embodiment (FIGS. 13 and 14), the motor 33 is a variable speed motor, and the controller 56 controls the speed of the filter medium 31, as in the eleventh embodiment (FIGS. 21 and 22). Speed can be controlled. In addition, as in the twelfth embodiment (FIGS. 23 and 24), the degree of contamination of the processed wastewater passing through the drain pipe 3a is detected, or as in the thirteenth embodiment (FIG. 25).
, FIG. 26), the degree of clogging of the used filter medium 31 is detected, and furthermore, as in the fourteenth embodiment (FIGS. 27 and 28), the negative pressure in the box 36 is detected to remove the filter medium 31. The speed may be controlled.

FIGS. 29 and 30 show a fifteenth embodiment of the present invention, and the processing fluid filtration device 4 and the filtration device 30 are the same as in the fourth embodiment (FIGS. 3 and 4). . 70 is a processing machine control device to which a pressure gauge 10 for monitoring the pressure of the processing fluid filter 7, a filtration pump 9, a supply pump 14, and a controller 56 are connected; Controls the blower 37 and pump 49.

[0080] The above-mentioned waste liquid filtration device usually has a fourth filter.
Processing waste liquid is regenerated into clean processing liquid by the same effect as in the embodiments shown in FIGS. 3 and 4.

By the way, when the machining fluid filter 7 or its filter medium 18 is replaced with a new one, fine machining debris passes through the filter 7, so it must be precoated in order to perform highly accurate filtration. When the machining liquid filter 7 is not precoated, the value of the pressure gauge 10 is low. The processing machine control device 70 receiving this command instructs the controller 56 not to select the filtering device 30 until the pressure value reaches a predetermined value. Blower 37 and pumping pump 4
9 to stop the operation and filter the machining liquid only by the machining liquid filter 7. When the precoating of the machining fluid filter 7 progresses and the pressure value reaches a predetermined value, the output signal from the pressure gauge 10 causes the machining machine control device 70 to send a signal to the controller 5.
6, the motor 33, the blower 37, and the pump 49 are operated to start the operation of the filtration device 30.

By the way, the size of processing debris that can be captured by the filter medium 31 is determined by the thickness of the filter medium 31, the suction pressure of the mesh and the blower 37, and the like. However, when processing the workpiece 2, the size of the processed waste changes depending on the processing conditions, so naturally the size of the processed waste to be filtered also changes. Therefore, if the thickness of the filter medium 31, the mesh, or the suction pressure of the blower 37 is constant, the filtration efficiency may decrease depending on the processing conditions. In other words, when fine machining debris is generated during finishing machining, the machining debris may pass through the filter medium 31, and conversely, when large machining debris is generated during rough machining, the filter medium 31 may become clogged. Sometimes it happens.

Furthermore, if the mesh surface 35 of the suction section 34 is long in the feeding direction of the filter medium 31 (in the direction of the arrow in FIG. 1), the processed waste once captured by the filter medium 31 will move in the direction of the arrow. A problem arises in that the processing waste is gradually sucked into the filter medium 31 and eventually passes through the filter medium 31.

FIGS. 31 and 32 are block diagrams of a sixteenth embodiment of the present invention, which is particularly designed to solve the above-mentioned problems. Note that the same parts as in the first to fifteenth embodiments are denoted by the same reference numerals, and explanations thereof will be omitted. 75 is a regulator provided in the pipe 38, and 76 is a controller for controlling opening and closing of the regulator 75, which is connected to the control device of the processing machine. Note that the controller 76 controls the motor 33 and the blower 37.
It is also connected.

In this embodiment as described above, when a processing start signal is sent from the processing machine control device to the controller 76, the controller 76 starts the motor 33 and the blower 37. Furthermore, the controller 76 takes in information on processing conditions from the control device of the processing machine, estimates the size of the processing waste, controls the regulator 75 in accordance with the size, and adjusts the suction force. In this embodiment, only the suction force was adjusted, but if the feeding speed of the filter medium 31 is also controlled by the rotational speed of the motor 33, more effective filtration can be achieved.

FIG. 33 is a block diagram of a seventeenth embodiment of the present invention. In this embodiment, a plurality of boxes 36a, 36b, 36c are provided at the lower part of the suction section 34, and pipes 38a, 38b, 38c opening onto the clean tank 6 are connected to each of the boxes 38a, 38b, 38c. are equipped with blowers 37a, 38b, 37c and valve 77a, respectively.
, 77b, and 77c are connected.

In this embodiment configured as described above, the suction force of the box 36a on the upstream side is the strongest, the suction force of the box 36c on the downstream side is the weakest, and the suction force of the middle box 36b is the same as that of both boxes. It is set in the middle. Therefore, the time taken to pass through the box 36a, which has a strong suction force, is shorter than in the past, so that the filter material 31 is moved onto the box 36b, which has a slightly weaker suction force, before processing debris that is slightly larger than the mesh of the filter medium 31 passes through the filter medium 31. Since it moves, it becomes difficult to be sucked in any further, and it is possible to capture not only large machining debris but also small machining debris. In addition, each box 3
The suction forces of 6a, 36b, and 36c may be changed.

FIG. 34 is a block diagram of an 18th embodiment of the present invention. In this embodiment, the sewage tank 5 is divided into a first sewage tank 5a, a second sewage tank 5a,
5b, and a drain pipe 3a connected to the processing tank 3 opens onto the first dirty liquid tank 5a. 79a
, 79b are upper limit float switches and lower limit float switches provided above and below the first sewage tank 5a, 80a is a stirring rod immersed in the first sewage tank 5a, and a motor 81a
driven by. 49 are the first and second sewage tanks 5a,
This is a suction pump that sends processed waste liquid from 5b to the mesh surface 35 via the pipe 48 and the disperser 41, and valves 78a and 78b are provided on the downstream side thereof.

Box 3 provided at the bottom of mesh surface 35
Two pipes 38d and 38e are connected to 6,
Valves 77d, 77e and blowers 37a, 37, respectively.
After passing through b, one side opens onto the second dirty liquid tank 5b and the other side opens onto the clean liquid tank 6. 79c and 79d are upper and lower float switches provided above and below the second sewage tank 5b, and 80b is the second sewage tank 5.
81b and is a stirring rod driven by a motor 81b. Note that the suction force of the blower 37b is equal to that of the blower 37a.
The suction force is set to be weaker than that of the Also, the valve 77d
, 77e, 78a, 78b, float switch 79a,
79b, 79c, 79d and the motor 33 are connected to a controller 76, and the controller 76 is connected to a control device of the processing machine.

In this embodiment configured as above,
Processing sewage generated during processing is drained through drain pipe 3a and hose 4.
0 and is led to the first dirty liquid tank 5a. First sewage tank 5
When the processed sewage accumulated in the tank a exceeds the upper limit float switch 79a, the valves 77d and 78a open, and the suction pump 49
is activated, and the processing waste liquid is sent to the filtering device 30. At the same time, the motor 33 and blower 37a are also driven, and the winding roll 3
2, the filter medium 31 is wound up. In this way, the processed sewage is filtered and passes through the pipe 38d to the second sewage tank 5b.
sent to. When the processing fluid in the first waste tank 5a becomes below the lower limit float switch 79b, the valves 77d and 78d are closed, and the suction pump 49, motor 33 and blower 3
7a stops.

Although most of the machining liquid in the second dirty liquid tank 5b has been filtered and has become a clean liquid, if there are still fine machining debris that has not been completely filtered, then the valve 78
b, 77e are opened to drive the suction pump 49, and at the same time, the motor 33 and blower 37b are operated. As a result, the machining liquid in the second dirty liquid tank 5b is filtered again, becomes a clean machining liquid, and is sent to the clean liquid tank 6. When the processing liquid 6 in the second waste liquid tank 5b becomes lower than the lower limit float switch 79d, the valves 78b and 77e are closed, and the suction pump 49
, the motor 33 and blower 37b stop. The stirring rods 80a and 80b are used to stir the processing debris in the waste liquid tanks 5a and 5b so that they do not settle.

[0092] In this way, in this embodiment, the range of sizes of processed waste that can be filtered is expanded by sucking and filtering processed waste liquid first with strong suction force and then with weak suction force. It is.

FIG. 35 is a block diagram of a nineteenth embodiment of the present invention. In this embodiment, the filter medium 31, the winding roll 3
2. The filtration device 30 is constructed by installing two filters 30a and 30b, each consisting of a motor 33, a suction section 34, a mesh surface 35, a box 36, etc., one above the other, and the box 36a of the first filter 30a The pipe 38a connected to
It is connected to a distributor 41b that opens onto the second filter 30a via a blower 37a. 38b is the second filter 3
This pipe is connected to the box 36b of 0b and opens onto the clean tank 6 via the blower 37b. In addition, blower 37
The suction force of a is set to be weaker than the suction force of the blower 37a.

Processing waste generated during processing is discharged from the discharge pipe 3a and sent to the first filter 3 by the disperser 41a.
It is dispersed and discharged onto 0a, passes through the filter medium 31a together with air by the blower 37a, and is absorbed into the box 36a. At this time, among the processed waste contained in the processed sewage, the filter material 31
Items larger than the mesh a cannot pass through the filter medium 31a and are captured by the filter medium 31a. The processing liquid filtered by the filter medium 31a passes through the pipe 38a and the disperser 41b to the second filter 30.
b, is discharged onto the mesh surface 35b, is sucked by the blower 37b, and passes through the filter medium 31b. At this time, the blower 37b
Since the suction force of the first filter 30a is weak, the filter medium 31a of the first filter 30a
The fine machining debris that has passed through is captured by the filter medium 31b, regenerated into a clean machining fluid containing almost no machining debris, and returned to the clean liquid tank 6.

In the above explanation, the suction force of the blower 37b was made weaker than the suction force of the blower 37a, but it is also possible to make the suction force of the two almost equal and to make the mesh of the filter medium 31b finer than the mesh of the filter medium 31a. You can also get the same effect. In addition, in the above embodiment, two filters 3
Although the case where filters 0a and 30b are installed one above the other is shown, three or more filters may be installed sequentially above and below.

Although not shown in the drawings, the present embodiment can also be implemented in each of the above-described embodiments as long as the machining fluid filtration device 4 is equipped with the machining fluid filter 7. In addition, in the above explanation, the case where this embodiment is implemented in an electrical discharge machine that performs machining by immersing the workpiece in machining fluid was shown, but It can also be applied to electric discharge machines that perform machining without

[0097]Although each of the above embodiments shows the case where the processed sewage supplied to the filtration device 30 is sucked by the blower 37, the upper surface of the filter medium 35 is covered with a box, for example, and pressure is applied inside the box. In addition, the processed waste liquid may be pushed out, in short, a pressure difference may be created between the upper surface side and the lower surface side of the filter medium.

[0098] The embodiments in which the present invention is applied to a wire electric discharge machine have been described in detail above, but the present invention is not limited thereto, and can be applied to die-sinker electric discharge machines, grinders, grinders, etc. that use machining fluid. It can also be implemented in a processing machine such as an ultrasonic processing machine.

0099

Effects of the Invention As is clear from the above description, the sewage filtration apparatus according to the present invention extracts sewage through a sheet-like filter medium that is continuously supplied, and removes foreign substances contained in the sewage from the filter medium. Therefore, it is possible to obtain a dirty liquid filtration device with a simple structure, high filtration efficiency, and easy treatment of the filter medium.

Furthermore, when a filter is provided in the filter, the filter can be precoated by stopping filtration using the filter medium for a predetermined period of time and filtering the dirty liquid using only the filter.

[0101] Furthermore, the presence or absence of the filter medium, the remaining amount, etc. are detected,
Alternatively, by controlling the feed rate of the filter medium,
It is possible to supply filter media without waste and perform stable filtration of dirty liquid.

[0102] Furthermore, by controlling the pressure difference between the upper surface side and the lower surface side of the filter medium, or by dividing the suction section of the pressure difference generating means into a plurality of sections and providing means for changing the pressure difference between each suction section, the filthy liquid can be reduced. can be filtered more cleanly.

Furthermore, the processing liquid filtration device for a processing machine according to the present invention has a simple structure, high filtration efficiency, and does not cause clogging, so that the operating rate of the processing machine can be increased.

[0104] Furthermore, when a filter is provided in the filter, not only can the life of the filter be extended and running costs reduced, but also the filtration by the filter medium can be stopped for a predetermined period of time and the sewage can be filtered only by the filter. As a result, the filter can be precoated, making it possible to perform high-precision machining in a short period of time, and together with reducing the number of filter replacements, it is possible to improve the operating rate of the processing machine.

[0105] Furthermore, by detecting the presence or absence of the filter medium and its remaining amount, or by controlling the supply speed of the filter medium, the filter medium can be supplied appropriately, and the processing waste liquid can be filtered in the optimum condition, so running costs can be reduced. Machining accuracy can be improved.

[0106] Furthermore, since the processing sewage can be switched to flow directly into the processing sewage tank, if a large amount of processing sewage is discharged, the filter medium runs out, or an abnormality occurs in the pressure difference generating means, By switching the flow of processing waste liquid directly to the processing waste liquid tank, processing can be continued without interrupting processing. Therefore, the operating rate can be further improved.

Furthermore, a means for controlling the pressure difference between the upper surface side and the lower surface side of the filter medium, or dividing the suction part of the pressure generating means into a plurality of parts to change the pressure difference between each suction part, or a filtering device is provided. By installing multiple stages above and below, filtration can be performed multiple times to increase filtration efficiency and further purify the processing liquid.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.

FIG. 2 is a plan view of the main parts of FIG. 1;

FIG. 3 is a schematic configuration diagram of a second embodiment of the present invention.

FIG. 4 is a plan view of the main parts of FIG. 3;

FIG. 5 is a schematic configuration diagram of a third embodiment of the present invention.

FIG. 6 is a plan view of the main parts of FIG. 5;

FIG. 7 is a schematic configuration diagram of a fourth embodiment of the present invention.

FIG. 8 is a plan view of the main part of FIG. 7;

FIG. 9 is a schematic configuration diagram of a fifth embodiment of the present invention.

FIG. 10 is a plan view of the main part of FIG. 9;

FIG. 11 is a schematic configuration diagram of a sixth embodiment of the present invention.

FIG. 12 is a plan view of the main part of FIG. 11;

FIG. 13 is a schematic configuration diagram of a seventh embodiment of the present invention.

FIG. 14 is a plan view of the main part of FIG. 13;

FIG. 15 is a schematic configuration diagram of an eighth embodiment of the present invention.

FIG. 16 is a plan view of the main part of FIG. 15;

FIG. 17 is a schematic configuration diagram of a ninth embodiment of the present invention.

FIG. 18 is a plan view of the main part of FIG. 17;

FIG. 19 is a schematic configuration diagram of a tenth embodiment of the present invention.

FIG. 20 is a plan view of the main part of FIG. 19;

FIG. 21 is a schematic configuration diagram of an eleventh embodiment of the present invention.

FIG. 22 is a plan view of the main part of FIG. 21;

FIG. 23 is a schematic configuration diagram of a twelfth embodiment of the present invention.

FIG. 24 is a plan view of the main part of FIG. 23;

FIG. 25 is a schematic configuration diagram of a thirteenth embodiment of the present invention.

FIG. 26 is a plan view of the main part of FIG. 25;

FIG. 27 is a schematic configuration diagram of a fourteenth embodiment of the present invention.

28 is a plan view of the main part of FIG. 27. FIG.

FIG. 29 is a schematic configuration diagram of a fifteenth embodiment of the present invention.

FIG. 30 is a plan view of the main part of FIG. 29;

FIG. 31 is a schematic configuration diagram of a 16th embodiment of the present invention.

FIG. 32 is a plan view of the main part of FIG. 31;

FIG. 33 is a schematic configuration diagram of a seventeenth embodiment of the present invention.

FIG. 34 is a schematic configuration diagram of an 18th embodiment of the present invention.

FIG. 35 is a schematic configuration diagram of a nineteenth embodiment of the present invention.

FIG. 36 is a schematic configuration diagram showing an example of a machining fluid filtration device for a conventional electric discharge machine.

37 is a partial cross-sectional view of the machining fluid filter of FIG. 36. FIG.

FIG. 38 is a plan view of FIG. 37;

FIG. 39 is a schematic configuration diagram showing another example of a conventional machining fluid filtration device.

[Explanation of symbols]

1 Wire electrode 2 Workpiece 3 Machining tank 4 Machining fluid filtration device 5 Dirty fluid tank 6 Clear fluid tank 7 Machining fluid filter 9 Filtration pumps 11, 12 Machining fluid nozzles 30 to 30b Filtration devices 31 to 31b Filter media 33 to 33c Motor 33a Variable speed motor 34, 34a Suction section 35-35b Mesh surface 36-36c Box 37-37c Blower 39-39b Processed sewage supply device 41-41b Disperser 43 Mesh member 46 Gas-liquid separation tower 47 Processed sewage reservoir 49 Sump pump 50 Partition plate 51 Gates 54, 55 Solenoid valves 56, 76 Controllers 58, 65 Reflective optical sensor 59 Negative pressure gauge 61 Encoder 62 Counter 70 Processing machine control device 77a-77e, 78a, 78b Valves 79a-7
9d Float switch 80a, 80b Stirring bar

Claims (16)

[Claims] 1. A filtration device for filtering and reusing sewage, comprising: a sheet-shaped filter medium that is continuously supplied; a sewage supply means that supplies the sewage to the filter medium; and a top surface side of the filter medium. 1. A filtration device for sewage, comprising: a pressure difference generating means for generating a pressure difference between the lower surface side and the lower surface side. 2. A filtration device that filters and reuses waste liquid through a filter installed in the filtration device, comprising: a sheet-like filter medium provided outside the filtration device and continuously supplied; A sewage supply means for supplying a liquid, a pressure difference generation means for generating a pressure difference between an upper surface side and a lower surface side of the filter medium, and a selection means for filtering the sewage liquid only by the filter for a predetermined period. A sewage filtration device characterized by: 3. The filter according to claim 1 or 2, further comprising a detection means for detecting the presence or absence and/or remaining amount of the filter medium.
The sewage filtration device described above. 4. The sewage filtration apparatus according to claim 1, further comprising a control means for controlling the supply rate of the filter medium. 5. Claim 1, further comprising a control means for controlling a pressure difference between an upper surface side and a lower surface side of the filter medium.
, 2, 3 or 4, the sewage filtration device. 6. The apparatus according to claim 1, further comprising means for dividing the suction part of the pressure difference generating means into a plurality of parts and changing the pressure difference between the respective suction parts. Sewage filtration equipment. 7. A processing fluid filtration device for a processing machine that filters and reuses processing sewage produced by processing a workpiece, including a sheet-like filter medium that is continuously supplied, and a filter medium that is filled with the processing sewage. A processing sewage supply means for supplying a liquid, a pressure difference generating means for generating a pressure difference between the upper surface side and the lower surface side of the filter medium, and a processing filtrate that has passed through the filter medium due to the pressure difference to a filtrate tank. A machining fluid filtration device for a machining machine, characterized in that it is equipped with a returning means. 8. The machining fluid filtration device for a processing machine according to claim 7, wherein the machining fluid supply means takes in the machining fluid from the processing machine. 9. The processing fluid filtration device for a processing machine according to claim 7, wherein the processing sewage supply means takes in the processing sewage discharged from the processing machine to the processing sewage tank. 10. The processed sewage supply means is characterized by comprising a path for supplying the processed sewage from the processing machine to a filter medium, a path for flowing the processed sewage into a processing sewage tank, and a switching means for switching between these two paths. A machining liquid filtration device for a machining machine according to claim 7 or 8. 11. A machining fluid filtration device for a processing machine in which machining fluid generated by machining a workpiece is filtered and reused by a filter installed in a filter, wherein the machining fluid filtration device is provided outside the filter and continuously a sheet-shaped filter medium to be supplied; a processed liquid liquid supply means for supplying the processed waste liquid to the filter medium; a pressure difference generating means for generating a pressure difference between the upper surface side and the lower surface side of the filter medium; A machining fluid filtration device for a machining machine, characterized in that the machining fluid filtration device for a machining machine is equipped with a return means for returning the machining filtrate that has passed through the filter medium to the filter due to a pressure difference, and a selection means for filtering the machining fluid only through the filter for a predetermined period. . 12. Claims 7 and 8, further comprising a detection means for detecting the presence or absence and/or remaining amount of the filter medium.
, 9, 10 or 11, the processing liquid filtration device for the processing machine. 13. Claims 7, 8, 9, and 10 further comprising a control means for controlling the supply rate of the filter medium.
, 11 or 12, the processing liquid filtration device for the processing machine. 14. The processing machine according to claim 7, 8, 9, 10, 11, 12, or 13, further comprising a control means for controlling a pressure difference between an upper surface side and a lower surface side of the filter medium. Processing liquid filtration equipment. 15. Claims 7, 8, 9, 10, 11, 12, characterized in that the suction part of the pressure difference generating means is divided into a plurality of parts and means is provided for changing the pressure difference of each suction part. 1
15. A processing fluid filtration device for a processing machine according to item 3 or 14. 16. The present invention is characterized in that a plurality of filtration devices each comprising the filter medium, a processing fluid supply means, and a pressure difference generation means are installed in upper and lower stages, and the lowest filtration device is provided with a means for returning the processing filtrate. A machining fluid filtration device for a machining machine according to claim 7.