JPH0351071Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a machining fluid filtration device used in electrical discharge machines and wire cutting machines.

(Prior art) Generally, when metal processing is performed using an electrical discharge machine or a wire cutter, machining fluid is circulated and supplied to the machining section, and the machining fluid containing impurities such as chips is contaminated. It is led to a tank where it is partially precipitated, then sucked up by a circulation pump and sent to a filtration device, where it is filtered by an element. In addition, the clean processing liquid after filtration is stored in a cleaning liquid tank and constantly overflows into the stock liquid tank.

(Problems to be Solved by the Invention) However, the processing fluid used in this type of metal processing cannot tolerate even the slightest impurities and requires extremely precise filtration.

On the other hand, the chips generated during metal processing are very fine, and therefore, in the case of an element designed to perform precise filtration as described above, fine chips are likely to accumulate on the filtration surface of the element, which is extremely fine. This causes the element to become clogged in a short period of time.

In such cases, the machining operation is interrupted and the element is replaced, but resetting the machining operation based on this replacement is extremely difficult and time-consuming, resulting in problems such as a significant drop in work efficiency. .

(Means for Solving the Problems) The present invention was devised to solve the above problems, and includes rotatably internally supporting a cylindrical filter element within a casing provided with an inlet and an outlet. A jet pipe extending in the same direction as the axis of the element is supported in close proximity to the outer peripheral surface or inner peripheral surface of the element, and liquid is jetted toward the element from a plurality of nozzle ports provided in the jet pipe. , the jet pipe is surrounded by a casing having a surface facing the circumferential surface of the element, the opening of the casing is brought into sliding contact with or close to the periphery of the element, and the lower end of the casing is It is characterized by being provided with a drainage outlet.

(Function) Thus, according to the present invention, while rotating the filtration element within the casing manually or by a motor, a liquid of the same type as the machining fluid is supplied under pressure to the jet pipe, and is supplied from the nozzle opening of the jet pipe. The jet is directed towards the element, and this blows off chips in the machining fluid that accumulate on the circumferential surface of the element, keeping the entire circumferential surface of the element clean at all times and preventing a drop in filtration efficiency. This prevents the element from clogging over a long period of time.
Moreover, the chips blown from the circumferential surface of the element are collected without being scattered inside the casing surrounding the jet tube, and are discharged from the drain outlet to the outside of the machine.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In the figure, reference numeral 1 denotes a casing consisting of a bottomed cylindrical main body 11 and a lid 12 that closes the upper opening of the main body 11. An inlet 13 is provided at the lower part of the main body 11, and an outlet is provided at the war story lid 12. 14 are formed respectively.

Reference numeral 2 denotes a cylindrical filtration element provided in the casing 1, and the filtration element 2 is made of a synthetic resin continuous filament obtained by a spunbond method, such as a nonwoven fabric of polyester continuous filament, which is pressed to form a pseudo-leather shape. It is constructed using a sheet material that has been pleated into a bellows shape. And the element 2 thus formed
is extrapolated onto a support plate 21 having a cross-shaped cross section, and an upper plate 22 having a through hole 24 in the center is fixed to the upper end of this element 2, and a lower plate having a support shaft 25 is attached to the lower end of the element 2. 23 are permanently installed. The upper and lower plates 22 and 23 are also fixed to the upper and lower ends of the support plate 21, respectively. Further, a rotating shaft 26 extending on the same axis as the supporting shaft 25 is provided on the upper part of the support plate 21, and the rotating shaft 26 is supported through the cover plate 12 of the casing 1, and the supporting shaft 26 of the lower plate 23 is inserted into and supported by the shaft hole 16 of the receiving seat body 15 fixed to the inner bottom of the casing 1, thereby rotatably supporting the element 2 within the casing 1. At this time, the upper plate of the element 2 22 is hermetically sealed against an annular seal 5 supported in the upper part of the casing 1 to partition the inside and outside of the element 2. Note that the rotating shaft 26 is connected to the cover plate 12.
protrudes outward, and the operating handle 2 is attached to the protruding shaft.
7 is installed.

Reference numeral 3 denotes a jet pipe that penetrates the bottom of the casing 1 and projects into the casing 1, and the jet pipe 3 extends in the same direction as the axis of the element 2 and is arranged to be close to the jet pipe 3. A plurality of nozzle ports 31 for spraying the cleaning liquid toward the element 2 are formed in the spray pipe 3.

Reference numeral 4 denotes a housing that surrounds both sides, upper and lower surfaces, and the back surface of the jet pipe 3 within the casing 1, and the front surface of the housing 4 is an opening portion 41, which is brought into sliding contact with or close to the element 2, and which A drain outlet 42 is provided at the lower end of the casing 4, and the outlet 42 passes through the casing 1 and is led out of the machine.

The filtration device of the present invention is constructed as described above, and the machining fluid used in the electrical discharge machine contains chips, etc., and the machining fluid containing the chips is fed into the casing 1 from the inlet 13. Chips in the machining fluid are filtered by the element 2 within the casing 1 and supplied to the electrical discharge machine again from the outlet 14.

During the above-mentioned filtration work, while rotating the element 2 together with the rotary shaft 26 using the operation handle 27, a cleaning liquid of the same type as the machining liquid is supplied under pressure to the jet pipe 3. The liquid is sprayed toward the element 2 from each nozzle port 31 of the elements 2. As a result, chips in the machining fluid that accumulate on the outer circumferential surface of the element 2 are blown away, and the entire outer circumferential surface of the element 2 is constantly kept clean. That's what I do. Further, chips and the like blown off from the outer peripheral surface of the element 2 are prevented from dissipating by the casing 4, that is, they are collected in the lower part of the casing 4, and are taken out of the machine together with the drained liquid from the drain outlet 42. It is.

(Effects of the invention) As explained above, when the filtration device according to the invention filters fine chips contained in machining fluid from an electric discharge machine using a filtration element, the filtration device rotates the filtration element and It is possible to keep the element clean at all times by spraying a cleaning liquid towards the element and blowing away the chips that tend to accumulate on the circumferential surface of the element, thus eliminating the need to replace the element over a long period of time. Furthermore, the cleaning of the element and the removal of blown chips to the outside of the machine can be carried out without interrupting the filtration work, and the overall working efficiency of the electric discharge machine can be greatly improved. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view thereof, and FIG. 2 is a cross-sectional view thereof. DESCRIPTION OF SYMBOLS 1... Casing, 13... Inlet, 14... Outlet, 2... Element, 3... Jet pipe, 31... Nozzle opening, 4... Housing, 41... Opening part, 42...
Drainage outlet.

Claims (1)

[Scope of utility model registration request] A cylindrical filter element is rotatably supported internally in a casing provided with an inlet and an outlet, and a jet pipe extending in the same direction as the axis of the filter element is supported in close proximity to the outer or inner circumferential surface of the filter element. The jet pipe is configured to inject liquid toward the filtration element from a plurality of nozzle ports provided in the jet pipe, and the jet pipe is surrounded by a casing having a surface facing the circumferential surface of the filtration element. 1. A filtration device for an electrical discharge machine, characterized in that the casing is surrounded by a filtration element, an opening of the casing is brought into sliding contact with or close to the periphery of a filtration element, and a drain outlet is provided at a lower end of the casing.