JP2730877B2 - Machining fluid filter device for electric discharge machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining fluid filter device for an electric discharge machine, and more particularly, to a discharge device capable of easily removing and replacing an ion exchange resin and extending the life of the ion exchange resin. The present invention relates to a processing fluid filter replacement device for a processing machine.

[0002]

2. Description of the Related Art Conventionally, water (pure water) is used as a machining fluid for an electric discharge machine.
When using, in order to keep the working fluid at an appropriate conductivity,
It has been practiced to pass a working fluid through an ion exchange resin.

When the discharge machining chip enters the ion exchange resin, the life of the ion exchange resin is shortened. Therefore, the machining fluid is filtered by a filter, and then the machining fluid is supplied to the ion exchange resin.

[0004]

However, in the conventional structure, there is a problem such as a filtering ability of the filter, and there is a problem in improving the life of the ion exchange resin. Further, in the conventional configuration, the ion exchange resin is in a state of being filled in a cylindrical container, and there is also a problem that it takes much time to exchange the ion exchange resin.

[0005]

According to a first aspect of the present invention, there is provided a machining fluid filter device for an electric discharge machine, comprising a tube having an inlet at one end and an outlet at the other end. A lid member is provided on one of the one end side or the other end side of the body so as to be openable and closable, and a filter bag body filled with ion exchange resin is provided in the filter bag body storage portion of the cylindrical body, and provided on the filter bag body. An adjacent activated carbon layer is provided, a support plate having a plurality of communication holes is provided between the activated carbon layer and the inflow port, and a space is provided between the filter portion including the filter bag body and the activated carbon layer and the inflow port. A part is formed.

According to a second aspect of the invention, there is provided a machining fluid filter device for an electric discharge machine, wherein the cylindrical body is made of a transparent resin.

[0007]

According to the first aspect of the present invention, an inflow port is provided at one end,
A lid member is provided on one end side or the other end side of the cylindrical body having an outlet at the other end side so as to be openable and closable, and a filter bag body filled with ion exchange resin is mounted in the filter bag housing portion of the cylindrical body. And a support plate provided with a plurality of communication holes between the activated carbon layer and the inflow port, the filter comprising the filter bag and the activated carbon layer. A space is formed between the part and the inlet.

Therefore, when the working fluid flows into the space from the inlet, the working fluid uniformly flows into the filter bag through the activated carbon layer, passes through the filter bag, and flows from the outlet to the outside of the cylinder. Will be leaked to

As described above, when the working fluid flows through the filter bag, filtration is performed by the filter bag, and ion exchange is performed by the ion exchange resin, thereby returning the electrical conductivity of the working fluid to the original state. be able to. When the ion exchange resin needs to be replaced due to long-term use, the lid member is opened, the filter bag is taken out of the cylinder, and replaced with a new one.

Further, since the activated carbon layer is provided adjacent to the filter bag filled with the ion exchange resin, the working fluid can be activated and the filtration function can be further improved. Extend the life of the device.

According to a second aspect of the present invention, in the first aspect of the invention, since the cylindrical body is made of a transparent resin, the state of the filter bag is visually observed from outside the working fluid filter device. It is possible to easily know the replacement time of the ion exchange resin.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a working fluid filter device 1 according to the present invention includes a cylindrical body 3 made of a transparent resin or the like, and discharge is provided at one end (bottom side) of the cylindrical body 3. An inflow port 5 through which a processing fluid from a processing machine (not shown) flows is provided,
An outlet 7 is provided at the other end (upper side).

A lid member 11 is provided at the other end of the cylindrical body 3 so as to be openable and closable so that the filter bag body 9 containing an ion exchange resin (not shown) is detachably mounted inside the cylindrical body 3. It is. A space 13 is provided between the inflow port and the filter bag body 9 for uniformly flowing the processing liquid from the inflow port 5 into the filter bag body 9.

More specifically, a support plate 15 for supporting the filter bag 9 is provided in the space 13, and the support plate 15 is supported by an annular support member 17. The support member 17 has a through-hole 19 formed in the space 13 on a peripheral surface thereof, and the support plate 15 is provided with a plurality of holes for communicating the space 13 with the storage portion 21 storing the filter bag 9. Hole 23 is provided.

The filter bag 9 has a bag-like structure made of, for example, a cloth which also serves as a filter for filtering electric discharge machining chips and the like in a working fluid, and an ion exchange resin is provided inside the bag.

Then, the filter bag 9 is inserted into the space 13
On one end side (bottom portion) opposite to the bottom surface, an uneven portion 9C having a peak portion and a valley portion is formed in order to increase the filtration area, and the inside of the filter bag 9 is provided with the uneven portion 9C. A saucer 9D for preventing the ion exchange resin from dropping into the tray is provided. This receiving tray 9D is also formed of a filter so as to filter the working fluid.

Further, in the present embodiment, activated carbon 10 is put in the region of the uneven portion 9C as an example of an active substance for activating the working fluid. Therefore, the working fluid can be activated, and the filtering function can be further improved.

The cover member 11 is integrally formed with a locking piece 29 having a projection 27 provided on the outer peripheral surface on the other end side of the cylindrical body 3 and having a bent claw 27 which is detachable from the projection 25 via a bolt 31. Is attached.

In the above configuration, the inflow port 5
When the machining fluid flows in from the
3 to 9C formed on the bottom of the filter bag 9
After being filtered in the concave-convex portion 9C and activated by the activated carbon 10, it uniformly flows into the ion-exchange resin portion via the receiving tray 9D, and ion-exchange of the working fluid is performed, thereby conducting the working fluid. The degree is improved.

That is, the uneven portion 9C of the filter bag 9
The machining fluid that has been filtered by the receiving tray 9D and activated by the activated carbon 10 is supplied to the ion exchange resin, so that a machining tip or the like for electric discharge machining does not adhere to the ion exchange resin. It is possible to extend the life of the resin.

The machining fluid that has passed through the filter bag 9 is returned from the storage section 21 to the electric discharge machine through the outlet 7.

When the filter bag 9 needs to be replaced, the lock piece 29 is rotated appropriately and the protrusion 25 is moved to the claw 2.
After removing the lid 7 and removing the lid member 11 from the cylinder 3, the filter bag 9 may be taken out of the cylinder 3 and replaced with a new filter bag 9. Whether or not the filter bag 9 needs to be replaced can be easily known by visually observing the inside of the tubular body 3 and knowing the state of contamination.

As will be understood, according to this embodiment, the filter bag 9 can be easily attached and detached and replaced, and the life of the ion exchange resin can be extended.

The bottom of the filter bag 9 has an uneven portion 9C.
It is optional to form or not, but in order to more reliably filter the working fluid and extend the life of the ion exchange resin, it is desirable to form the above-mentioned uneven portion 9C. Further, the direction of the flow after processing can be reversed from that in the above embodiment.

[0025]

As will be understood from the above description of the embodiment, the invention according to the first aspect of the present invention has an inflow port at one end and an outflow port at the other end. A lid member is provided on one of the other ends so as to be openable and closable, and a filter bag body filled with an ion exchange resin is provided in the filter bag housing portion of the cylindrical body, and an activated carbon layer adjacent to the filter bag body is provided. Providing a support plate having a plurality of communication holes between the activated carbon layer and the inflow port, and forming a space between the filter portion made of the filter bag body and the activated carbon layer and the inflow port. It becomes.

Therefore, when the working fluid flows into the space from the inlet, the working fluid uniformly flows into the filter bag through the activated carbon layer, passes through the filter bag, and flows out of the outlet through the outlet. Will be leaked to

As described above, when the working fluid flows through the filter bag, filtration is performed by the filter bag, and ion exchange is performed by the ion exchange resin, thereby returning the electrical conductivity of the working fluid to the original state. be able to. When the ion exchange resin needs to be replaced due to long-term use, the lid member is opened, the filter bag is taken out of the cylinder, and replaced with a new one.

Further, since the activated carbon layer is provided adjacent to the filter bag filled with the ion exchange resin, the working fluid can be activated and the filtration function can be further improved, and the ion exchange resin can be improved. Extend the life of the device.

According to a second aspect of the present invention, in the first aspect of the invention, since the cylindrical body is made of a transparent resin, the state of the filter bag body is visually observed from outside the working fluid filter device. It is possible to easily know the replacement time of the ion exchange resin.

[Brief description of the drawings]

FIG. 1 is a sectional explanatory view of a working fluid filter device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing fluid filter device 3 Cylindrical body 5 Inlet 7 Outlet 9 Filter bag 9C Concavo-convex part 9D Receiving tray 10 Activated carbon 11 Cover member 13 Space

Claims (2)

(57) [Claims] 1. A filter bag housing portion for a cylindrical body having an inflow port on one end side and an outflow port on the other end side, wherein a lid member is provided on one end side or the other end side so as to be openable and closable. A filter bag filled with ion exchange resin is attached to the
An activated carbon layer adjacent to the filter bag, a support plate provided with a plurality of communication holes between the activated carbon layer and the inflow port, a filter portion including the filter bag and the activated carbon layer, and the inflow port; A machining fluid filter device for an electric discharge machine, wherein a space is formed between the machining fluid filter device and the machining fluid filter device. 2. A machining fluid filter device for an electric discharge machine according to claim 1, wherein said tubular body is made of a transparent resin.