CS262197B1 - A device for cleaning and liquid dispensing - Google Patents

Abstract

A device for cleaning and circulating cutting fluid, intended for cooling the tools of machine tools, especially machines for grinding the fruits of optical elements made of glass, consists of a collecting container and a storage container. The collecting container is divided by a filter insert into the lower part, into which the inlet of the cutting fluid contaminated with glass crumb flows, and the upper part, which is connected by an overflow channel to the storage container, in which a pump for draining clean cutting fluid into the machining area is placed. The collecting container is covered with a lid containing an inlet opening and an outlet opening for oil mist

Description

The device for cleaning and circulation of cutting fluid intended for cooling tools of machine tools, in particular machines for grinding the fruit of optical elements made of glass, consists of a collecting vessel and a reservoir. The collecting vessel is divided by a filter element into a lower part into which the inlet of the glass crushes the contaminated cutting fluid and an upper part which is connected via an overflow channel to a storage vessel in which a pump for conveying clean cutting fluid to the machining space is stored. The collecting vessel is covered by a wolf comprising an inlet opening and an oil mist discharge opening.

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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cleaning and circulating coolant for cooling tools of machine tools, in particular machines for processing flat or curved surfaces of optical elements made of glass, comprising a container with an inlet for contaminated cutting fluid. cutting fluids back to the machined surface.

When grinding optical elements made of glass using diamond tools, a large amount of glass pulp is washed away by the cutting fluid, which is also a cooling medium. In forced circuit cooling using different types of aggregates, the presence of this glass pulp causes a number of problems in the machine mechanisms with which contaminated cutting fluid comes into contact. Therefore, a clean, de-greased cutting fluid must be supplied to the tool and the work surface. However, this requires continuous cleaning, which can be solved in a simple manner, i.e. by passing the coolant through a vessel or a cascade of vessels on the bottom of which the particles of glass debris settle. However, such a device is bulky and inefficient. Another method consists in centrifuging the glass pulp in centrifuges. The disadvantage, however, is the high noise level of centrifuges and costly operation.

The most common method of cleaning by filtration is shown in FIG. 1, according to which the contaminated cutting fluid is fed from above into a container in which it flows through a transversely mounted filter insert, typically formed by filter paper or fabric. On its surface, the glass pulp settles and the clean cutting liquid, which flows into the bottom of the container, is led back to the working space by means of a pump. The disadvantage, however, is the rapid clogging of the filter paper and hence its frequent replacement. This is partly prevented by the additional device of FIG. 2, in which a plurality of filter paper or fabric is wound in a roll, the wound portion serving as a storage. After the functional part of the paper has been clogged, the clean part is fed into the cleaning space by the rollers either in cycles or more frequently, while the clogged part is deposited in the waste container. The disadvantage is relatively complicated equipment and high consumption of filter material.

However, this and the previous method have a further disadvantage. Part of the coolant, especially if it consists of a special thin oil, is misted during machining, which makes machining difficult and makes the working environment uncomfortable. For this reason, the working area must be practically hermetically covered and the resulting oil mist can be discharged by means of various ventilation devices. If, however, the waste hose or duct flows from above into the area of the cleaning device, whether it is a centrifuge or a filter, the waste device connects the enclosed work area to the ambient air, thereby aerating it and thereby substantially reducing the efficiency of the ventilation. A simple solution on the siphon principle is problematic due to its rapid clogging.

All of the aforementioned disadvantages of existing cleaning devices have led to the desire to propose a method of filtration which would simply and efficiently remove the glass pulp from the cutting fluid and also prevent aeration of the working relationship. This device should be simple in design, without maintenance and frequent cleaning of the filter part, while eliminating oil vapors.

Claims (3)

SUMMARY OF THE INVENTION This object of the present invention is a device for cleaning and circulating coolant for cooling tools of machine tools, in particular machines for working flat or curved surfaces of optical elements made of glass, comprising a container with an opening for feeding coolant. and a hole for draining the cleaning fluid. SUMMARY OF THE INVENTION The device consists of a collecting vessel interconnected with a reservoir in which a pump with an outlet opening is arranged. The collecting vessel is divided by a filter element into a lower part, into which the inlet of glass-polluted cutting liquid leads, and an upper part, which is connected to the reservoir by an overflow channel. The upper part of the collecting container may be covered by a lid which is provided with an inlet opening and a discharge opening and whose side walls abut the filter element carrier. The filter element can be inserted between two strainers. The main advantage of the solved device is that it is absolutely efficient with low consumption of filter cartridges. Indeed, the cutting fluid contaminated with glass pulp is unconventionally fed into the space below the filter element. Here the glass pulp settles under its own weight on the bottom and only slight residues are retained on the filter element, which was still retained in the cutting fluid during sedimentation. From there, however, they also fall to the bottom of the collecting container under their own weight. The device also solves the problem of aerating the working space through the cutting liquid outlet and thus reliably removing mist from the working space. An exemplary embodiment of a cleaning device according to the invention is shown schematically and in section in the accompanying drawing, in which: FIG. 1 a commonly used cleaning device; FIG. 2 a cleaning device with a filter paper cartridge; FIG. 3 a cleaning device according to the invention. As can be seen from FIG. 3, the cleaning device according to the invention is formed by a collecting vessel connected to a storage container 2. The collecting vessel 1 is divided into a bottom part 11 and a top 6 by a filter element 14 consisting of filter paper. The upper part is covered by a cover 3 comprising an inlet opening 31 of oil mist 34, which is then discharged outside the working environment through a drainage opening 32. Side walls 33 the lids 3 extend up to the screen 15 of the filter element 14, thereby ensuring the hermetic nature of the upper part 12. Above the filter element 14, an overflow channel 21 is formed connecting this upper part 12 to a storage container 2 containing a pump 4 connected to the outlet 41. The described apparatus operates as follows. The contaminated cutting fluid 18 is fed from the untreated workpiece by the inlet 13 into the lower part 11 of the collecting vessel 1. This gradually fills the entire space and passes through the sieves 15 and the filter insert 14 between them into the upper part 12. it falls under its own weight to the bottom where it settles and any small particles are trapped on the filter element 14, from where they fall down again. Thus, a clean cutting fluid 18 flows into the upper part 12, the level of which rises 19 up to the edge of the overflow duct 21, through which it flows into the storage container 2. From there it is discharged through the outlet opening 41 back into the working space. The upper part 12 of the collecting container 1 is fed through the inlet opening 31 with the oil mist 34 produced in the working space. This is partially condensed into oil in space 12 and the remainder is discharged with air out of the workplace through a drain 32. The described cleaning and circulating equipment is suitable for all machine tools and especially for those where optical glass elements are machined. SUBJECT 1. Apparatus for cleaning and circulating coolant for cooling machine tool tools, in particular for working flat or curved surfaces of optical elements made of glass, comprising a container with a hole for the inlet of contaminated coolant, a filter element and a hole for draining liquid back to the machining surface, characterized in that it consists of a collection vessel (1) connected to a storage vessel (2), in which a pump (4) with an outlet opening (41) is arranged, wherein the collection vessel (1) is a filter element (14) divided into a lower part (11) into which the inlet (13) flows through the glass pulp (17) of the contaminated cutting fluid (18) and the upper part (12) which is connected to the storage container (2) via the overflow channel (21J). Cleaning device according to claim 1, characterized in that the upper part (12) of the collecting container (1) is covered by a lid (3) which is provided with an inlet opening (31) and an outlet opening (32) and whose side walls (33) ) abut the filter element (14). Cleaning device according to claim 1, characterized in that the filter element (14) is inserted between two strainers (15). 1 sheet of drawings AND