JP3752185B2 - Cutting fluid filtration device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting fluid filtering device, and more particularly to a device for filtering cutting fluid containing chips discharged in a metal cutting operation by a machining center or the like.
[0002]
[Prior art]
As a cutting fluid filtering device, a drum filter type device as shown in FIG. 2 is known. This is a filtration tank 51 in which an inlet 52 for cutting fluid containing chips from the machining center is formed at one end, and an obliquely upward rising portion is provided at the other end and a downward sludge discharge port 53 is formed at the tip. In the filtration tank 51, a conveyor 54 that extends from the lower side of the introduction port 52 to the sludge discharge port 53, with scrapers 55 attached at appropriate intervals, is disposed, and the upper extension boundary of the filtration tank 51 A drum filter 56 is rotatably supported in the vicinity. A backwash nozzle is provided in the drum filter 56.
[0003]
In the case of this configuration, when cutting fluid containing chips is introduced from the introduction port 52, chips having a large specific gravity are deposited on the bottom surface of the filtration tank 51. The accumulated sludge 57 is scraped off by the scraper 55 of the circulating conveyor 54, pushed by the scraper 55 along the bottom surface of the filtration tank 51 and the side surface of the obliquely upward rising portion, and discharged from the sludge discharge port 53. Further, the cutting fluid containing floating foreign matters such as paint residue is filtered by the filter cloth on the surface of the drum filter 56 and discharged from the drum filter 56.
[0004]
In the cutting fluid filtering device having such a configuration, all of the floating foreign matters that float without being settled and the foreign matters that fall from the return path (upper stage) scraper 55 and the like gather on the drum filter 56. There is a problem that the load applied to 56 is large, and the filter is easily clogged or damaged, resulting in a decrease in filtration accuracy.
[0005]
As another cutting fluid filtering device, there is one using a magnet plate as shown in FIG. This is a structure in which a duct 58 and a magnet plate 59 are arranged instead of the drum filter in the drum filter type apparatus described above, and other configurations are the same as those described above. The duct 58 is provided on the side surface of the inner end of the filtration tank 1, and the magnet plate 59 is installed on the outer bottom surface on the lower side of the duct 58.
[0006]
In this magnet filter type apparatus, sludge from the introduced cutting fluid is pushed by the scraper 55, and floating foreign matter is attracted and collected by the magnet plate 59 before the cutting fluid flows out to the duct 58, and the scraper. Together with the sludge 57 fed by 55.
[0007]
However, in this magnet filter type device, the sludge 57 may become a large lump depending on the shape of the chips, etc. In this case, when the forward scraper 55 and the backward scraper 55 pass each other, the backward scraper 55 The sludge 57 touches and breaks up the sludge 57, and when the sludge 57 overlaps, the sludge 57 lumps gradually and may not be discharged.
[0008]
[Problems to be solved by the invention]
As described above, since the conventional cutting fluid filtration apparatus has various problems, the present invention does not have such a problem, that is, the filtration accuracy is maintained over a long period of time, and the cutting fluid is efficiently filtered. It is an object of the present invention to provide a cutting fluid filtering device capable of performing the above.
[0009]
[Means for Solving the Problems]
The cutting fluid filtration device according to the present invention for solving the above-described problems is provided with a filtration tank having an inlet at one end and an obliquely rising portion at the other end, and a filtrate outlet is provided on the side wall of the filtration tank. In addition, a conveyor in which scrapers are attached at appropriate intervals in the filtration tank extends from the bottom of the inlet to the upper end of the obliquely upward rising portion, and is disposed through the bottom of the filtrate outlet. A partition plate curved along the conveyor is disposed inside, and an internal magnet plate is fixed to the back surface of the partition plate below the filtrate outlet , and at least the introduction port of the internal magnet plate The side end portion is inclined and the lower end portion of the partition plate is inclined upward.
[0010]
Preferably, fixing the external magnet plate to the filtration tank outside bottom of the lower of the inlet, also causes reach the partition plate to the full width of the filtration tank.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view showing a configuration of a cutting fluid filtering device according to the present invention. In FIG. 1, reference numeral 1 denotes a filtration tank, in which an inlet 2 for cutting fluid containing chips from a machining center or the like is formed at one end. . An oblique rising portion 3 extending obliquely upward is extended to the other end of the filtration tank 1. A downward sludge discharge port 4 is formed at the tip of the oblique rising portion 3.
[0012]
5 is a conveyor in which scrapers 6 are arranged at appropriate intervals, and extends from the end portion on the introduction port 2 formation side to the sludge discharge port 4 through the oblique rising portion 3.
[0013]
Reference numeral 7 denotes a partition plate disposed inside the conveyor 5, and extends in a curved manner along the conveyor 5 from an intermediate portion of the filtration tank 1 to an upper portion of the oblique rising portion 3. It is preferable that the partition plate 7 extends over the entire width of the filtration tank 1. The lower end 7a of the partition plate 7 is usually slightly inclined upward.
[0014]
A filtrate outlet 13 leading to the duct 14 is formed on the side surface of the oblique rising portion 3 extending portion side end of the filtration tank 1, and an inner magnet plate 12 is provided on the rear surface of the partition plate 7 below the filtrate outlet 13. Is established. Preferably, an external magnet plate 9 is attached to the outer bottom surface of the filtration tank 1 below the introduction port 2.
[0015]
Inclined guides 15 may be provided at both ends of the internal magnet plate 12 or at the front end in the forward conveyor traveling direction (right end in FIG. 1) to prevent chips from being caught. Of course, instead of providing the inclined guide 15, the end portion of the internal magnet plate 12 itself may be processed into an inclined state.
[0016]
In this configuration, foreign matter such as chips and resin in the cutting fluid flowing from the inlet 2 is deposited on the inner bottom surface of the filtration tank 1, and the sludge 10 is scraped and pushed by the scraper 6 to be discharged into the sludge outlet 4. Discharged from. When the external magnet plate 9 is provided, magnets such as chips are attracted and collected by the external magnet plate 9.
[0017]
Further, the foreign matter that has flowed into the upper side of the partition plate 7 and the foreign matter brought about by the scraper 6 in the return path are deposited on the partition plate 7. The sludge 11 on the upper surface of the partition plate 7 is scraped and fed by the scraper 6 on the return path, dropped from the front end 7a of the partition plate 7, and mixed with the sludge 10 on the inner bottom surface of the filtration tank 1. Foreign matter having magnetism such as chips is attracted to the internal magnet plate 12 and collected on the partition plate 7. The filtrate flows out from the filtrate outlet 13 to the duct 14.
[0018]
【The invention's effect】
The present invention is as described above, and the filtration tank is partitioned up and down by the partition plate, so that the filtration performance is maintained for a long period of time without using a drum filter, and also efficiently and at low cost. Thus, the cutting fluid can be filtered.
[0019]
Further, chips to the end of the inner magnet plate is prevented from accumulation I hook, is blocked by the end of the upward slope of the specification Setsuban, that chips or the like, flows into the filtrate outlet side The effect is prevented as much as possible.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a configuration of a cutting fluid filtering device according to the present invention.
FIG. 2 is a longitudinal sectional view showing a configuration of a conventional cutting fluid filtering device.
FIG. 3 is a longitudinal sectional view showing another configuration of a conventional cutting fluid filtering device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filtration tank 2 Inlet 3 Rising part 4 Sludge discharge port 5 Conveyor 6 Scraper 7 Partition plate 7a Lower end part 9 External magnet plate 10 Sludge 11 Sludge 12 Internal magnet plate 13 Filtrate outlet 14 Duct 15 Inclination guide

Claims (3)

A conveyor having an inlet at one end and an obliquely rising portion at the other end, a filtrate outlet on the side wall of the filter tank, and a scraper attached to the filter tank at appropriate intervals Extending from the bottom of the inlet to the upper end of the obliquely upward rising portion and passing under the filtrate outlet, and a partition plate curved along the conveyor is disposed inside the conveyor. The inner magnet plate is fixed to the back surface of the partition plate below the filtrate outlet , and at least the introduction port side end portion of the inner magnet plate is inclined, A cutting fluid filtering device characterized in that a lower end portion is inclined upward .   The cutting fluid filtration device according to claim 1, wherein an external magnet plate is fixed to the outer bottom surface of the filtration tank below the introduction port.   The cutting fluid filtration device according to claim 1 or 2, wherein the partition plate extends over the entire width of the filtration tank.

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