JPH04106604U - Filter element for purifying electrical discharge machining fluid - Google Patents

Abstract

(57) [Summary] [Purpose] For purifying electrical discharge machining fluid, the replacement work can be done easily and in a short time, there is no leakage of contaminated machining fluid, sludge, etc. during the replacement work, the structure is simple, and the manufacturing cost is low. Provide filter elements. [Structure] A filter paper 6 is sandwiched between an upper end plate 2 provided with a liquid supply port 9 and a lower end plate 3 having a sealed shape, and a filter paper 6 is placed in a space formed by an outer cylinder 4 and an inner cylinder 5 through which fluid can pass. This is a filter element 1 that encloses. Liquid supply port 9
The processing liquid supplied into the inner cylinder space 7 is passed from the inner surface to the outer surface of the filter paper 6 to be filtered. Since the lower part of the inner cylinder space 7 is sealed by the lower end plate 3, residual sludge, contaminated machining fluid, etc. in the inner cylinder space 7 will not flow out during replacement work.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a filter element used when cleaning the electrical discharge machining fluid of an electrical discharge machine. Regarding ment.

0002

[Conventional technology]

Filter elements used in electrical discharge machining fluid filters can be roughly divided into external pressure type and internal pressure type. There are two types: pressure type and pressure type. External pressure type filters machining fluid supplied under pressure. - Passes from the outer surface of the element to the inner cylinder space for filtration. Internal pressure type The processing fluid is supplied under pressure to the inner cylinder space of the filter element and passes through to the outer surface. It is used for filtering. In this way, an external pressure type filter element and an internal pressure type filter element are used. It is structurally different from the router element because the flow direction of the machining fluid is opposite. Each of them had the following problems and drawbacks.

0003 In the case of external pressure type filter elements, processing fluid must be supplied under pressure to the outer surface. Therefore, a pressure vessel is required in which the external pressure type filter element is installed. In addition, the sludge contained in the machining fluid was removed from the outer surface of the external pressure filter element. The external pressure type filter element body is easy to clean and can be reused. Although it has the advantage of being possible, it requires cleaning the inside of the pressure vessel mentioned above. there were. As a result, there is a problem that the electrical discharge machine must be stopped for a long time. It was.

0004 On the other hand, in the case of an internal pressure type filter element, processing fluid is supplied under pressure to the inner cylinder space. Therefore, insert a supply pipe that also serves as a mounting member into the inner cylinder space, The internal pressure type filter element is pressure-clamped in the axial direction. Same internal pressure type fi Since no pressure acts on the container that covers the filter element, the external pressure filter It does not need to be as pressure resistant as a pressure vessel for Element, and a simple cover is sufficient. However, the internal pressure type filter element body cannot withstand pressure clamping force. I needed the strength to survive.

[0005] In addition, in the case of internal pressure type filter elements, cleaning and reuse is not a consideration. If it gets dirty, it has to be replaced with a new one, which costs a lot of money. It was. In particular, the internal pressure type filter element has improved strength but costs are reduced. Since it is a top-up type filter element, the cost to replace it is lower than that of an external pressure type filter element. It took a lot.

[0006] Furthermore, the internal pressure type filter element has a penetrating inner cylinder space, so it When replacing the product, the sludge adhering to the inside of the product may fall to the bottom of the container. Sometimes it happened. Therefore, the valve installed at the bottom of the container was opened, and the fallen The sludge is discharged to the sedimentation tank and is also passed to the cleaning tank located above the same valve. The opening and closing operations of the valves are extremely troublesome because the valves must be closed. Ta.

[0007] As mentioned above, running costs are low for external pressure filter elements. However, there were problems such as increased cost of the pressure vessel and increased downtime during cleaning. . In addition, in the case of internal pressure type filter elements, although the storage container is inexpensive, the run There were problems such as increased maintenance costs and the hassle of opening and closing valves during replacement work. . Furthermore, a major problem common to both is the collection of used filter elements. When pulled out from the storage container, the cloudy machining fluid drips onto the work floor and the machining fluid supply. There were cases where the outer periphery of the device was contaminated.

[0008]

[Problem that the idea aims to solve]

The problem that this invention aims to solve is that replacement work can be done easily and in a short time. Manufactured with a simple structure that eliminates the spillage of contaminated processing fluid, sludge, etc. during replacement work. A filter element for purifying electrical discharge machining fluid that is low in cost and requires a low cost for storage containers. The aim is to provide the elements.

[0009]

[Means to solve the problem]

The gist of the present invention, which solves this problem, is that the upper end plate and the lower end plate The filter paper is placed in the space formed by the outer cylinder and inner cylinder, which are sandwiched between the outer cylinder and the inner cylinder through which fluid can pass. The electrical discharge machining fluid that was sealed and supplied into the inner cylindrical space is passed from the inner surface to the outer surface of the filter paper. The fluid passes through the lower end plate of the filter element that filters the fluid. The upper end plate has a sealed shape with the periphery bent downward. A flange-like member with a liquid supply port and multiple cutouts on the inner or outer periphery. A filter for purifying electrical discharge machining fluid, characterized in that it is installed above the fluid supply port. It's in the element.

0010

[Effect]

The filter element of the present invention for purifying electrical discharge machining fluid is supplied under pressure to the inner cylinder space. It filters the processed liquid by passing it from the inner surface to the outer surface of the filter paper. It belongs to the internal pressure type filter element. Therefore, storage containers are especially pressure-resistant. It doesn't have to be sexual.

[0011] In the filter element for purifying electrical discharge machining fluid of this invention, the lower end plate is It has a sealed shape that does not allow fluids such as machining fluid to pass through. In other words, the inner cylinder space is axial Since it does not penetrate in the direction, processing fluid remaining in the inner cylinder space will not pass through the filter paper. It will not leak out unless it is. For this reason, sludge etc. accumulate after being used to some extent. Even if you take out the accumulated EDM fluid purification filter element from the storage container, the same problem will occur. If sludge or contaminated machining fluid remaining in the inner cylinder space leaks into the storage container, There is no possibility of dripping onto the surrounding work area floor. Therefore, cumbersome valve opening/closing operations are required. There is no need for manual labor or time-consuming cleaning work.

0012 The filter element for purifying electrical discharge machining fluid of the present invention allows machining fluid to enter the inner cylindrical space. A liquid supply port for supplying liquid is provided in the upper end plate. Periphery of the liquid supply port is bent downward, so the machining fluid supply pipe inserted into the fluid supply port It adheres well to the outer periphery of the cylinder, preventing machining fluid from leaking even if the fluid pressure in the inner cylinder space increases. You can

[0013] The flange-shaped member installed above the liquid supply port connects the machining liquid supply pipe. This is for attaching and detaching metal fittings. Provided on the inner or outer periphery of the flange-like member A pressure contact claw and a pressure contact ring that can pass through the notch are provided on the connecting fitting. The flange-like member is sandwiched between the pressure contact ring and the pressure contact ring, which has been rotated slightly after passing through it. By holding and tightening, the machining fluid supply pipe can be connected to the same electrical discharge through the connecting fitting. It is designed to be fixed to the filter element for purifying industrial fluids. Same flange part Notches in the material may be provided on either the inner or outer periphery, and the number of such notches is also particularly limited. It's not something you do.

[0014] The filter element for purifying electrical discharge machining fluid of this invention is easy to clean when stored in a storage container. , since axial pressure clamps are not required, high strength that can withstand pressure clamping force is required. do not need. This reduces the manufacturing costs required to create a high-strength structure. Wear. In addition, there is no need for the storage container to have a pressure-resistant structure, so it costs less. Effective in reducing

[0015]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1 is a plane showing Example 1 Figure 2 is a partially cutaway vertical sectional view showing Example 1, and Figure 3 is a plan view showing Example 2. 4 is a partially cutaway vertical sectional view showing Example 2, FIG. 5 is a plan view showing Example 3, and FIG. 6 is an actual view. A plan view showing Example 4, FIG. 7 is a partially cutaway vertical sectional view showing Example 3, and FIG. 8 is Example 3. 9 is a partially cutaway vertical sectional view showing Example 4, and FIG. 10 is a plan view showing Example 4. FIG. 11 is a partially cutaway vertical sectional view showing the third embodiment.

[0016] The filter element 1 of Example 1 has an upper end plate 2 and a lower end plate. Inside the space formed by the outer cylinder 4 and the inner cylinder 5 which are sandwiched between the rate 3 and through which fluid can pass. A filter paper 6 folded into a pleated shape and made into a cylinder is enclosed in the filter paper 6 and fed into the inner cylinder space 7. The processed liquid is filtered by passing it from the inner surface to the outer surface of the filter paper 6. Outer cylinder 4 and The inner cylinder 5 is made of punched metal or the like through which the machining fluid can easily pass. lower en The doped plate 3 has a sealed shape that does not allow machining fluid to pass through. Upper end plate 2 A liquid supply port 9 is provided in the shape of the peripheral edge 8 bent downward, and two liquid inlets are provided on the inner peripheral portion. A flange-like member 11 provided with a notch 10 is attached above the liquid supply port 9.

[0017] In the filter element 1 of Example 1, the lower end plate 3 is used to store processing liquid, etc. It has a sealed shape that does not allow fluid to pass through. In other words, the inner cylinder space 7 penetrates in the axial direction. Therefore, the machining fluid remaining in the inner cylinder space 7 will not be released outside unless it passes through the filter paper 6. There will be no leakage. For this reason, the filter may accumulate sludge etc. after being used for some time. Even if the router element 1 is removed from the storage container, there may be residual slurry in the inner cylinder space 7. Dirt or contaminated processing fluid leaks into the storage container or drips onto the surrounding work area floor. There is no such thing. Therefore, troublesome valve opening/closing operations and time-consuming cleaning work are eliminated. No longer necessary, replacing filter element 1 is easy and quick. Become.

[0018] The peripheral edge 8 of the liquid supply port 9 of the filter element 1 of Example 1 was bent downward. Because it is shaped and has elasticity, it is easy to insert the machining fluid supply pipe into the fluid supply port 9. It adheres well to the outer periphery of the pipe, and prevents leakage of machining fluid even if the fluid pressure in the inner cylinder space 7 increases. It can be prevented.

[0019] The filter element 12 of Example 2 has a structure similar to that of the filter main body. It is the same as element 1, but two notches 14 are provided on the outer periphery of the flange-like member 13. It was established. In addition, the filter element 15 of Example 3 and the filter element 15 of Example 4 The structure of the main body of the filter element 16 is the same as that of the filter element 1. However, the shapes of the flange-like members 17 and 18 are different. flange shaped member Three notches 19 are provided on the inner periphery of the flange member 17, and three notches 19 are provided on the outer periphery of the flange-like member 18. has four notches 20.

[0020] 7 and 8 show the connecting fitting 2 of the machining fluid supply pipe 24 to the filter element 15. 1 is shown attached. Passes through the notch 19 on the inner circumference of the flange-like member 17 The flange-like member 17 is sandwiched between the pressure contact claw 22 and the pressure contact ring 23 which have been rotated slightly. By holding and tightening, the machining fluid supply pipe 24 is connected via the connecting fitting 21. It is designed to be detachably connected to the router element 15.

[0021] Figures 9 and 10 show a fitting for connecting the machining fluid supply pipe 24 to the filter element 16. 25 is shown attached. Pass through the notch 20 on the outer periphery of the flange-like member 18. A flange-like member 18 is placed between the pressure contact claw 26 and the pressure contact ring 27, which have been slightly rotated. By clamping and tightening, the machining fluid supply pipe 24 is connected via the connecting fitting 25. It is adapted to be detachably connected to the filter element 16.

[0022] FIG. 11 shows a machining fluid supply pipe connected to the filter element 15 via the connecting member 21. The state in which the pipes 24 are connected and stored in the storage container 28 is shown. filter element When storing the ment 15, there is no need for an axial pressure clamp, so a conventional filter can be used. It is not necessary to have a high-strength structure that can withstand pressure welding clamping force like the main element. This reduces production costs and the like. Also, the storage container 28 has a particularly pressure-resistant structure. Since there is no need to build a structure, it is effective in reducing costs. These advantages are mentioned above. The same result can be obtained when using filter elements 1, 12, and 16. Wear. In addition, all of Examples 1 to 4 filter elements 1, 2, 15, and 16 It is used to purify electrical discharge machining fluid, but it is used in processes that purify similar fluids. If so, it can also be used in other fields.

[0023]

[Effect of the idea]

With this invention, replacement work can be done easily and in a short time, and there is no pollution during replacement work. There is no leakage of turbid machining fluid, sludge, etc., the simple structure has a low manufacturing cost, and it is easy to store. To provide a filter element for purifying electrical discharge machining fluid that requires a low cost for a container. be able to.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a first embodiment.

FIG. 2 is a partially cutaway vertical cross-sectional view showing Example 1. FIG.

FIG. 3 is a plan view showing Example 2.

FIG. 4 is a partially cutaway vertical cross-sectional view showing Example 2. FIG.

FIG. 5 is a plan view showing Example 3.

FIG. 6 is a plan view showing Example 4.

FIG. 7 is a partially cutaway vertical cross-sectional view showing Example 3.

FIG. 8 is a plan view showing Example 3.

FIG. 9 is a partially cutaway vertical cross-sectional view showing Example 4.

FIG. 10 is a plan view showing Example 4.

FIG. 11 is a partially cutaway vertical cross-sectional view showing Example 3.

[Explanation of symbols]

1 Filter element 2 Upper end plate 3 Lower end plate 4 Outer cylinder 5 Inner cylinder 6 Filter paper 7 Inner cylinder space 8 Peripheral area 9 Liquid supply port 10 Notch 11 Flange-shaped member 12 Filter element 13 Flange-shaped member 14 Notch 15 Filter element 16 Filter element 17 Flange-shaped member 18 Flange-shaped member 19 Notch 20 Notch 21 Connecting metal fittings 22 Pressure contact claw 23 Pressure ring 24 Machining fluid supply pipe 25 Connecting metal fittings 26 Pressure contact claw 27 Pressure ring 28 Storage container

Claims (1)

[Scope of utility model registration request] Claim 1: A filter paper is enclosed in a space formed by an outer cylinder and an inner cylinder which are sandwiched between an upper end plate and a lower end plate and through which fluid can pass, and a discharge is supplied into the inner cylinder space. In the filter element that filters the processed liquid by passing it from the inner surface to the outer surface of the filter paper, the lower end plate has a sealed shape that prevents fluid from passing through, and the upper end plate has a liquid supply shape with the peripheral edge bent downward. A filter element for purifying electric discharge machining fluid, characterized in that a flange-like member having an opening and a plurality of notches on the inner or outer periphery is attached above the fluid supply opening.