JP4835129B2 - Cutting fluid regenerator - Google Patents

Description

  The present invention recovers cutting fluid discharged from a machine tool or the like that performs cutting processing, separates foreign matter such as chips and oily substances contained in the cutting fluid, and regenerates the cutting fluid. About.

  In general, in cutting, a workpiece made of a metal material is cut while being exposed to a cutting fluid to reduce frictional heat and improve lubricity, thereby improving machinability. ing.

  Therefore, the cutting fluid discharged from the machine tool after use includes oily substances such as lubricating oil coming out of the workpiece and foreign matters such as metal chips (sludge). And it is necessary to isolate | separate such a foreign material and to regenerate and reuse the cutting fluid.

  Conventionally, as this type of general cutting fluid regenerating device, a recovery drum that collects cutting fluid is provided with a rotating drum in contact with the cutting fluid, and the rotating drum rotates foreign matter in the cutting water around its axis. There has been proposed a method in which foreign matter adhered to the circumferential surface of the material is separated by scraping off the foreign matter adhering to the rotating drum with a scraper (see, for example, Patent Document 1).

And in this thing, in order to make the chip and oily substance contained in the cutting fluid in the recovery tank rise to the liquid level of the cutting fluid, aeration is performed at the lower part of the side wall of the recovery tank, and the oily substance is generated by the buoyancy of the bubbles. Foreign matter such as swarf and chips floats on the liquid surface and is guided to a rotating drum provided in the center of the same recovery tank to be attached.
JP 2001-288794 A

  However, in the above-described conventional cutting fluid regenerating apparatus, bubbles generated by aeration are generated on the side wall of the recovery tank, and the foreign matter adhering to the side wall is floated on the liquid surface, and the rotating drum located at the center of the recovery tank To collect.

  Therefore, in the middle of moving the liquid level from the side wall to the center of the recovery tank, foreign matter may be mixed again with the cutting fluid or precipitated, and the recovery efficiency may be reduced. In particular, chips with high specific gravity are difficult to recover because they are likely to settle and not reach the rotating drum.

  The present invention has been made in view of the above problems, and allows foreign substances including oily substances and chips in the cutting fluid to float to the liquid surface, adhere to the rotating drum, and be appropriately separated from the cutting fluid. The purpose is to do.

  In order to achieve the above object, the present invention divides the recovery tank (10) into two parts, and the cutting fluid flowing into the first tank tank (11) is separated from the bottom surface of the first tank tank (11). As a result of aeration, the foreign matter in the cutting fluid floats together with the foam, and the foreign matter adheres to the foam on the surface of the cutting fluid. The foreign matter together with the foam passes through the partition plate (13) to the second tank tank ( 12), the foreign matter is separated by being attached to the rotating drum (20) provided in the second tank tank (12) and scraped off by the scraper (30, 31). To do.

  In this way, aeration is performed on the bottom surface of the first tank tank (11), and foreign matters such as chips and oily substances are floated and attached to the bubbles on the liquid surface, and the foreign materials are separated by the bubbles. The liquid is moved over the partition plate (13) to the second tank tank (12), and the foreign matter adheres to the rotating drum (20) together with the foam so as to be separated from the cutting liquid. In (12), no foreign matter is precipitated or mixed again in the regenerated cutting fluid.

  Therefore, according to the cutting fluid regenerating apparatus of the present invention, the foreign substance including the oily substance and the chips in the cutting fluid is caused to float up to the liquid surface, adhere to the rotating drum (20), and appropriately separated from the cutting fluid. Can do.

  In the cutting fluid regenerating apparatus having the first feature, the present invention provides an outflow passage (12a) for allowing the regenerated cutting fluid to flow out of the second tank tank (12) into the second tank tank (12). The outflow passageway (12a) was extended from the bottom surface of the second tank tank (12) toward the liquid surface direction of the cutting fluid in the second tank tank (12) and was bent again toward the bottom surface. The second characteristic is that the channel has a shape.

  According to this, the portion of the supernatant near the liquid surface of the cutting fluid stored and regenerated in the second tank tank (12) can be discharged from the second tank tank (12) and reused.

  Here, as an aeration part (40), air is supplied to the porous member (41) laid in the whole bottom face of the 1st tank tank (11), and a bubble is generated from the said porous member (41). Or a plurality of holes (43a) by supplying air to a pipe (43) laid over the entire bottom surface of the first tank tank (11) and having a plurality of holes (43a) on the peripheral surface. To generate bubbles.

  According to these aeration units (40), aeration from the entire bottom surface of the first tank tank (11) becomes possible, and foreign matter is effectively removed from the entire cutting fluid in the first tank tank (11). Can surface up to.

  Further, the present invention provides the cutting fluid regenerating apparatus having the first or second feature described above, wherein the scrapers (30, 31) are provided on the circumferential surface and both end surfaces rotating in the rotating drum (20). The third feature.

  According to this, not only the foreign matter adhering to the circumferential surface rotating in the rotating drum (20) but also the foreign matter adhering to both end surfaces of the rotating drum (20) can be scraped off.

  According to the present invention, in the cutting fluid regenerating apparatus having the first to third features, a stacking unit (50) is provided for collecting foreign matter scraped from the rotating drum (20) by the scraper (30, 31). The stacking part (50) is provided with separation means (52, 53) for separating chips and oily substances by utilizing the difference in specific gravity between the chips and oily substances in the foreign matter. The fourth feature. According to this, chips and oily substances can be separated and collected in the foreign matter.

  Further, in the cutting fluid regenerating apparatus having the above first to fourth characteristics, the present invention is configured such that the upper part of the partition plate (13) has a curved shape following the circumferential curve of the rotating drum (20). The fifth feature.

According to this, it becomes easy to move the foreign matter together with the foam to the second tank tank (12) and adhere to the rotating drum (20). Further, in the cutting fluid regenerating apparatus having the first to fourth features, minute irregularities that improve the adhesion of the bubbles are formed on the circumferential surface of the rotating drum (20) to which the bubbles to which foreign matter has adhered are attached. It may be provided.

  In addition, the code | symbol in the bracket | parenthesis of each means described in the claim and this column is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals in the drawings in order to simplify the description.

(First embodiment)
FIG. 1 is a perspective view showing a schematic external configuration of a cutting fluid regenerating apparatus 100 according to the first embodiment of the present invention, and FIG. 2 is a schematic cross-sectional configuration of the cutting fluid regenerating apparatus 100 shown in FIG. FIG.

  This apparatus 100 collects the used cutting fluid 200 including foreign matter composed of the chips 201 and the oily substance 202, and separates and regenerates the foreign matter 201, 202 in the used cutting fluid 200.

  In FIG. 2, the chips 201 inside the used cutting fluid 200 are black triangles, the oily substance 202 is an ellipse with hatching, and the bubbles 300 generated in the used cutting fluid 200 are white ellipses. , Schematically.

  The apparatus 100 is broadly attached to the recovery tank 10 for recovering the used cutting fluid 200, the rotating drum 20 provided in the recovery tank 10 and rotating in contact with the used cutting water 200, and the rotating drum 20. Scraper 30 that scrapes off foreign matter 201 and 202. In addition, each part which comprises this apparatus 100 consists of metals, such as stainless steel, and is mutually assembled | attached by welding, screwing, etc.

  The collection tank 10 includes a first tank tank 11 and a second tank tank 12 provided adjacent to the first tank tank 11. A partition plate 13 is provided between the first tank tank 11 and the second tank tank 12, and both the tank tanks 11 and 12 are partitioned and separated by the partition plate 13.

  A cutting fluid inlet 11a is provided at a lower portion of the first tank tank 11, and the used cutting fluid 200 discharged from a machine tool or the like through the cutting fluid inlet 11a is supplied to the first tank tank 11. To flow into.

  Then, by continuously flowing the used cutting fluid 200 into the first tank tank 11, the liquid level of the used cutting fluid 200 stored in the first tank tank 11 rises, and the first tank tank 11. The used cutting fluid 200 in the vehicle passes over the partition plate 13 and flows into the second tank tank 12.

  Here, as shown in FIG. 2, an aeration unit 40 is provided on the bottom surface of the first tank tank 11 to aerate the used cutting fluid 200 in the first tank tank 11 on the bottom surface. Yes. Here, the aeration unit 40 performs aeration over the entire bottom surface of the first tank tank 11.

  In the present embodiment, the aeration unit 40 includes a porous member 41 laid on the entire bottom surface of the first tank tank 11, and an air inlet 42 provided at the lower part of the first tank tank 11. ing.

  Here, the porous member 41 is made of porous ceramic such as pumice, resin, or the like, and the air inlet 42 is connected to the porous member 41 and supplies air to the inside of the porous member 41. It is.

  The air inlet 42 is connected to, for example, a so-called factory air source provided in a factory, an air compressor, or the like, so that air is supplied from the air inlet 42 to the porous member 41. I have to.

  As shown in FIG. 2, in the porous member 41 to which air is supplied, bubbles 300 are generated from the holes, so that the entire surface of the bottom surface of the first tank tank 11 is used against the used cutting fluid 200. Aeration can be performed.

  That is, the explosion unit 40 of the present embodiment performs aeration by supplying air to the porous member 41 laid on the entire bottom surface of the first tank tank 11 and generating bubbles 300 from the porous member 41. It is structured as a thing.

  And by generation | occurrence | production of the bubble 300 by this explosion part 40, the foreign materials 201 and 202 come to float on the liquid level of the used cutting fluid 200 with the bubble 300 which generate | occur | produces from the whole bottom face of the 1st tank tank 11. FIG. Yes.

  Here, as shown in FIG. 2, the bubbles 300 that have floated on the surface of the used cutting fluid 200 in the first tank tank 11 do not disappear immediately due to the viscosity of the cutting fluid 200. A foreign matter such as the above-described chip 201 and oily substance 202 adheres to the surface.

  As described above, the used cutting fluid 200 that continuously flows into the first tank tank 11 gets over the partition plate 13 and flows into the second tank tank 12, so that the used cutting fluid 200 is used. 200 moves to the second tank tank 12 over the partition plate 13 together with the bubbles 300 to which the foreign substances 201 and 202 are attached.

  The rotating drum 20 is a columnar member provided in the vicinity of the partition plate 13 in the second tank tank 12, and is rotated around its axis by a drive motor 21 attached to the second tank tank 12. Is.

  The drive motor 21 is driven by energization, for example, and has a function of controlling the rotational speed of the rotary drum 20 so as to achieve an optimum rotational speed by changing it, for example, by accelerating or decelerating the rotational speed. is there.

  And since the rotating drum 20 is provided in the vicinity of the partition plate 13, in the 2nd tank tank 12, the bubble 300 with the foreign materials 201 and 202 which got over the partition plate 13 is the circle | round | yen of the rotating drum 20 which rotates. By attaching to the peripheral surface, it is separated from the used cutting fluid 200.

  The used cutting fluid 200 separated from the foam 300 is regenerated by separating the foreign substances 201 and 202 together with the foam 300, and the second tank tank 12 is used as the regenerated cutting fluid 210 that is the regenerated cutting fluid. It is to be stored in.

  Here, the rotating drum 20 is adjacent immediately after the partition plate 13, and the lower portion of the rotating drum 20 is immersed in the regenerated cutting fluid 210 in the second tank tank 12, and the upper portion of the reclaimed cutting fluid 210 is higher than the liquid level. It is provided in an exposed form.

  Specifically, the rotary drum 20 has a structure in which the side adjacent to the partition plate 13 is a rising surface by the drive motor 21, that is, in the direction of lifting from the liquid level of the regenerated cutting fluid 210 on the side adjacent to the partition plate 13. It has a rotating structure.

  The scraper 30 is provided on a circumferential surface that rotates in the rotary drum 20. Specifically, the scraper 30 is plate-shaped, and one end portion of the scraper 30 is in contact with a portion above the liquid level of the regenerated cutting fluid 210 on the side where the rotary drum 20 sinks into the regenerated cutting fluid 210. The second tank tank 12 is attached.

  And in the scraper 30, the other end part on the opposite side to the one end part side which contact | connects the rotating drum 20 is arrange | positioned with the inclination so that it may become below the said one end part. In addition, the other end portion of the scraper 30 is provided with a stacking unit 50 in which foreign substances 201 and 202 scraped from the rotary drum 20 by the scraper 30 are collected.

  The accumulating unit 50 is attached to the second tank tank 12, and receives a foreign substance 201 and 202 flowing from the scraper 30 and a collection container for collecting the foreign substance 201 and 202 falling from the receiving part 51. 52.

  With such a configuration, the foreign substances 201 and 202 adhering to the rotary drum 20 are scraped off by the scraper 30, and the scraper 30 having the above-described inclined arrangement flows down to the lower side of the inclination and is collected in the stacking unit 50. It is like that.

  In addition, as shown in FIG. 2, the second tank tank 12 has an outflow passage 12 a for allowing the regenerated cutting fluid 210 stored in the second tank tank 12 to flow out of the second tank tank 12, and the regeneration. And a cutting fluid outlet 12b through which the cutting fluid 210 flows out.

  Then, the regenerated cutting fluid 210 in the second tank tank 12 is led out from the cutting fluid outlet 12b through the outflow passage 12a. The cutting fluid outlet 12b is connected to a cutting fluid supply path of a machine tool or the like, and the regenerated cutting fluid 210 coming out of the cutting fluid outlet 12b is reused for cutting.

  Here, the outflow channel 12a has a channel shape that extends from the bottom surface of the second tank tank 12 toward the liquid surface of the regenerated cutting fluid 210 and is bent again toward the bottom surface. The outflow channel 12a is formed by, for example, providing a plate material that forms the channel in the second tank tank 12.

  In the outflow passage 12a having such a bent flow passage shape, the amount of the regenerated cutting fluid 210 stored in the second tank tank 12 increases, and the liquid level reaches the top of the outflow passage 12a. When it is exceeded, the spill starts.

  In the cutting fluid regenerating apparatus 100, while the used cutting fluid 200 discharged from a machine tool or the like is continuously flowing into the first tank tank 11, the rotary drum 20 is rotated by the drive motor 21, and the first The cutting fluid regeneration operation is started in a state in which aeration by the aeration unit 40 is generated on the entire bottom surface of the tank tank 11.

  The used cutting fluid 200 continuously flowing into the first tank tank 11 is first aerated on the entire bottom surface of the first tank tank 11.

  Thereby, it is prevented that the used cutting fluid 200 containing the chip 201 and the oily substance 202 stays. Therefore, it is possible to prevent the growth of anaerobic bacteria in the first tank tank 11, prevent the generation of malodor, and prevent the cutting fluid 200 from deteriorating.

  At this time, due to aeration from the bottom surface of the first tank tank 11, a large stirring action and ascending action are generated in the used cutting fluid 200 in the first tank tank 11. Due to these actions, foreign substances 201 and 202 mixed in the used cutting fluid 200 float on the liquid surface of the used cutting fluid 200.

  Further, at this time, the bubbles 300 generated in the aeration unit 40 also float on the liquid surface of the used cutting fluid 200 and are present in a large amount due to the viscosity of the cutting fluid 200. Therefore, the chips 201 and oily substances 202 that have floated on the liquid surface adhere to the bubbles 300, and the foreign substances 201 and 202 are caused by the bubbles 300 in the liquid surface portion of the used cutting fluid 200 in the first tank tank 11. It is in a state separated from the cutting fluid 200.

  Here, since the aeration is performed on the entire bottom surface of the first tank tank 11, the floating action of the foreign matters 201 and 202 by the bubbles 300 acts on the entire used cutting fluid 200 in the first tank tank 11.

  For this reason, in the used cutting fluid 200 existing in the first tank tank 11, there are substantially no portions where the foreign matter 201, 202 is precipitated or mixed again in the liquid, and the foreign matter 201, 202 is brought to the liquid level. The floating is performed efficiently in the entire liquid.

  Then, by the continuous supply of the used cutting fluid 200, the above phenomenon is continuously performed in the first tank tank 11, and the foam 300 to which the foreign substances 201 and 202 are attached is separated from the partition plate 13 together with the used cutting fluid 200. Get over and move to the second tank tank 12.

  The foam 300 with the foreign substances 201 and 202 moved to the second tank tank 12 reaches the rising surface of the rotary drum 20 adjacent to the partition plate 13 before the foam 300 disappears. That is, the cutting fluid 200 reaches the rotating drum 20 while maintaining the state where the foreign substances 201 and 202 are separated by the bubbles 300.

  Therefore, the foreign substances 201 and 202 do not settle together with the foam 300, but are adhered to the circumferential surface of the rotary drum 20 due to the viscosity of the foam 300 and are scooped up and moved to the second tank tank 12. It is separated from the surface.

  Thereafter, the foam 300 adhering to the rotating drum 20 disappears with the lapse of time due to the rotation of the rotating drum 20, and the remaining foreign matter 201, 202 is scraped off by the scraper 30 and collected and collected in the accumulating unit 50. Thereby, the chip 201 and the oily substance 202 can be effectively separated from the used cutting fluid 200 discharged from a machine tool or the like.

  On the other hand, the regenerated cutting fluid 210 from which the foreign substances 201 and 202 have been removed in the second tank tank 12 is once stored in the second tank tank 12 and rises to the vicinity of the liquid level by the outflow passage 12a, and the cutting fluid outlet. It flows out of 12b. The regenerated cutting fluid 200 that has flowed out is circulated to the machine tool or the like and reused.

  By allowing the regenerated cutting fluid 210 to flow out through the outflow passage 12a, only the supernatant portion near the liquid surface of the reclaimed cutting fluid 210 staying in the second tank tank 12 is reused. Can do.

  Even if the regenerated cutting fluid 210 contains some chips 201 that cannot be separated, the chips 201 are deposited on the bottom surface of the second tank tank 12. Therefore, when the outflow passage 12a is formed in such a bent shape, the regenerated cutting fluid 210 can be kept out of the second tank tank 12 and reused for reuse.

  As described above, according to the present embodiment, the used cutting fluid 200 flowing into the first tank tank 11 is aerated from the entire bottom surface of the first tank tank 11, thereby cutting fluid 200. The foreign matter 201 and 202 inside is floated together with the foam 300, the foreign matter 201 and 202 is attached to the foam 300 on the liquid level of the used cutting fluid 200, and the foam 300 is moved to the second tank tank 12, and the partition plate 13 The foreign matter 201, 202 is separated by adhering to the rotary drum 20 located in the vicinity of the surface and scraping with the scraper 30.

  That is, the cutting fluid regenerating apparatus 100 according to the present embodiment separates the recovery tank 10 into two tank tanks 11 and 12, and removes foreign matter 201 and 202 in the first tank tank 11 with the recovered cutting fluid 200 on the liquid surface. The second tank tank 12 is provided with a separation function for adhering the foreign substances 201 and 202 to the rotary drum 20.

  And this cutting fluid reproduction | regeneration apparatus 100 makes the 1st tank the cutting fluid 200 in the state from which the foreign material 201,202 was isolate | separated by the said foam 300 between the two tank tanks 11 and 12 which have such each function. The entire bubble 300 is moved from the tank 11 to the second tank tank 12.

  In particular, in the present embodiment, aeration is performed on the entire bottom surface of the first tank tank 11, and the foreign substances 201 and 202 are caused to float and adhere to the bubbles 300 on the liquid level by the bubbles 300 generated thereby. In the entire first tank tank 11, the foreign substances 201 and 202 are not precipitated again in the liquid or mixed with the cutting liquid.

  Then, the bubbles 300 with the foreign substances 201 and 202 are moved over the partition plate 13 to the rotating drum 20 provided in the vicinity of the partition plate 13, are attached together with the bubbles 300, and are collected by the scraper 30. In the two tank tank 12, the clean cutting fluid 210 is stored without the foreign matters 201 and 202 being precipitated or mixed in the cutting fluid.

  As described above, according to the present embodiment, the foreign substance including the oily substance 202 and the chips 201 in the used cutting fluid 200 floats up to the liquid surface of the cutting fluid, adheres to the rotating drum 20, and is used cutting. The liquid 200 can be appropriately separated.

(Second Embodiment)
FIG. 3 is a partial cross-sectional perspective view showing a schematic configuration of a main part of a cutting fluid regenerating apparatus according to the second embodiment of the present invention, and a separation mechanism for separating foreign matter in the apparatus, that is, a rotary drum 20, The part regarding the scraper 30 and the stacking unit 50 is shown. In the present embodiment, the scraper 30 and the stacking unit 50 are partially modified in the cutting fluid regenerating apparatus shown in the first embodiment.

  First, in this embodiment, as shown in FIG. 3, the scrapers 30 and 31 are provided in contact with the circumferential surface and both end surfaces that rotate in the rotary drum 20. That is, in this embodiment, in addition to the circumferential scraper 30 provided in the first embodiment, the side scraper 31 is added so as to be in contact with both end faces of the rotary drum 20.

  As shown in FIG. 1, the rotating drum 20 mainly separates and attaches the foreign substances 201 and 202 together with the bubbles 300 on the rotating circumferential surface. Adhere to.

  In the configuration of the present embodiment, the side scraper 31 separates and collects the chips 201 and the oily substance 202 separated and adhered by the rotating drum 20 not only from the circumferential surface of the rotating drum 20 but also from the end surfaces on both sides. Therefore, the separation efficiency of the chips 201 and the oily substance 202 can be further improved.

  As shown in FIG. 3, in the present embodiment, the accumulating unit 50 includes separation means 52 and 53 that separate the chips 201 and the oily substances 202 from the collected foreign matter. The separation means 52 and 53 separate the chips 201 and the oily substances 202 by utilizing the difference in specific gravity between the chips 201 and the oily substances 202.

  Specifically, the separation means 52 and 53 of the present embodiment includes a first container 53 that collects the foreign substances 201 and 202 and a second container 52 provided below the first container 53. It is.

  That is, the collecting unit 50 according to the present embodiment has an oil separation container 53 as a first container 53 interposed between the receiving part 51 and the collecting container 52 in the collecting part 50 shown in FIG. The container 52 is made to function as the second container 52.

  Here, two oil separation containers 53 as the first container 53 are provided on the upper and lower sides, and have a two-stage configuration. Each oil separation container 53 is provided with an opening 53a at a part of its bottom surface. Furthermore, one end of the oil separation container 53 is connected to the opening 53a and the other end extends in the opposite direction to the bottom surface. A pipe portion 53b is provided.

  In such a stacking unit 50, the cutting fluid including the foreign matters 201 and 202 is collected from the receiving unit 51 into the first-stage oil separation container 53. Then, relatively heavy chips 201 of foreign matter in the cutting fluid are deposited on the bottom surface of the oil separation container 53.

  On the other hand, the relatively light oily substance 202 floats on the surface of the cutting fluid in the oil separation container 53 and passes through the pipe portion 53b and the opening 53a of the oil separation container 53 from the opening on the other end side of the pipe portion 53b. To the second-stage oil separation container 53.

  In the second-stage oil separation container 53, the same separation action as that in the above-described first stage is exhibited. In this way, the heavy chip 201 is precipitated in the oil separation container 53, and the light oily substance 202 is dropped from the opening 53a of the oil separation container 53 to the recovery container 52, so that the chip 201 and the oily substance are dropped. 202 can be separated and recovered. As a result, classification at the time of disposal becomes easy.

  The oil separation container 53 may have a two-stage configuration as shown in FIG. 3 or more, for example, a three-stage configuration. Of course, the oil separation container 53 may be one.

  Further, in this embodiment, in the cutting fluid regenerating apparatus shown in the first embodiment, the scraper 30 and the stacking unit 50 are partially deformed. However, only the modified example related to the scraper 30 shown in the present embodiment is described above. It is also possible to employ the cutting fluid regenerating apparatus shown in the first embodiment, and only the modification related to the stacking unit 50 shown in the present embodiment is employed in the cutting fluid regenerating apparatus shown in the first embodiment. May be.

(Third embodiment)
FIG. 4 is a diagram showing a schematic sectional configuration of a cutting fluid regenerating apparatus 200 according to the third embodiment of the present invention. In this embodiment, the aeration unit 40 and the partition plate 13 are partially modified in the cutting fluid regenerating apparatus shown in the first embodiment.

  In the said 1st Embodiment, the aeration part 40 was equipped with the porous member 41 laid so that it might spread over the whole bottom face of the 1st tank tank 11, and aeration was performed by supplying air to this. However, in the present embodiment, the aeration unit 40 includes a pipe 43 laid on the entire bottom surface of the first tank tank 11 instead of the porous member.

  FIG. 5 is a plan view of the pipe 43 as viewed from above the bottom surface of the first tank tank 11. As shown in FIG. 5, the pipe 43 is arranged on the entire bottom surface of the first tank tank 11 by making it U-shaped, W-shaped, or a continuous shape thereof.

  One end of the pipe 43 is connected to the air introduction port 42 so that air is introduced, and the other end is a closed dead-end pipe. Are provided with a plurality of holes 43a.

  Accordingly, in the aeration unit 40 of the present embodiment, when air is introduced into the pipe 43 from the air inlet 42, bubbles are generated by the air coming out of the plurality of holes 43a, so that the first tank Aeration over the entire bottom surface of the tank 11 is possible. If such a pipe 43 is used, manufacture of the aeration part 40 becomes easy.

  Further, as shown in FIG. 4, in this embodiment, the upper part of the partition plate 13 that divides the collection tank tank 10 into the first tank tank 11 and the second tank tank 12 follows the circumferential curve of the rotary drum 20. It has a curved shape.

  By using the curved partition plate 13 as described above, the upper portion of the partition plate 13 approaches the rotating drum 20. Therefore, the foam 300 with the foreign matters 201 and 202 can reach the circumferential surface of the rotating drum 20 in a shorter time from the occurrence thereof, and can quickly and effectively adhere to the circumferential surface of the rotating drum 20. As a result, the recovery efficiency of the chips 201 and the oily substance 202 can be increased.

  Here, in this embodiment, in the cutting fluid regenerating apparatus shown in the first embodiment, the aeration unit 40 and the partition plate 13 are partially deformed. However, the present embodiment is applied to the second embodiment. Is also possible.

  Furthermore, it is also possible to employ only the modified example related to the aeration unit 40 shown in the present embodiment in the cutting fluid regenerating apparatus shown in the first or second embodiment, and the partition plate shown in the present embodiment You may employ | adopt only the modification concerning 13 to the cutting fluid reproduction | regeneration apparatus shown by the said 1st or 2nd embodiment.

(Other embodiments)
If the aeration unit 40 can aerate the used cutting fluid 200 in the first tank tank 11 over the entire bottom surface of the first tank tank 11, the porous member 41 described above is used. Other than the one using the pipe 43.

  Moreover, in the said embodiment, in the cutting fluid reproduction | regeneration apparatus, the reproduction | regeneration operation | movement of cutting fluid was performed in the state which made the used cutting fluid 200 discharged | emitted from a machine tool etc. flow in into the 1st tank tank 11 continuously. However, the flow of the used cutting fluid 200 into the first tank tank 11 may be intermittent as long as the above-described operation effect of the regeneration device can be obtained.

  Further, in each of the above embodiments, the cutting may be performed by mixing a surfactant or the like in the cutting fluid. According to this, there is an advantage that the foaming of the cutting fluid is improved when performing foreign matter separation using bubbles as in the above embodiments.

  In addition, minute irregularities may be provided on the circumferential surface of the rotary drum 20 to which the bubbles 300 with the foreign substances 201 and 202 adhere to improve the adhesion of the bubbles 300. In addition to the water-soluble cutting fluid, the cutting fluid may be a cutting oil mainly composed of oil.

  Moreover, the 2nd tank tank 12 should just be what can store the reproduction | regeneration cutting fluid 210, and may not be provided with the said outflow channel 12a which makes the reproduction | regeneration cutting fluid 210 flow out from the 2nd tank tank 12. . For example, the regenerated cutting fluid 210 may be reused by pumping out the second tank tank 12 with a pump or the like.

1 is a perspective view of a cutting fluid regenerating apparatus according to a first embodiment of the present invention. It is a schematic sectional drawing of the cutting fluid reproduction | regeneration apparatus shown by FIG. It is a partial cross section perspective view which shows the principal part of the cutting fluid reproduction | regeneration apparatus which concerns on 2nd Embodiment of this invention. It is a schematic sectional drawing of the cutting fluid reproduction | regeneration apparatus which concerns on 3rd Embodiment of this invention. It is the top view which looked at the pipe in FIG. 4 from the upper direction of the bottom face of a 1st tank tank.

Explanation of symbols

10 ... Recovery tank, 11 ... First tank tank,
12 ... 2nd tank tank, 12a ... Outflow flow path,
13 ... partition plate, 20 ... rotating drum,
30 ... scraper, 31 ... side scraper,
40 ... Aeration part, 41 ... Porous member as aeration part, 43 ... Pipe as aeration part,
43a ... a plurality of holes in the pipe, 50 ... stacking part,
52... Collection container as a second container of the separating means,
53. Oil separation container as the first container of the separation means,
53a ... Opening of oil separation container, 53b ... Pipe part,
200 ... used cutting fluid, 201 ... chip as foreign matter,
202: Oily substance as foreign matter, 210: Recycled cutting fluid.

Claims (8)

A collection tank (10) for collecting cutting fluid containing foreign matter;
A rotating drum (20) provided in the recovery tank (10) and rotating around an axis in contact with the cutting water;
A scraper (30, 31) for scraping off the foreign matter in the cutting fluid adhering to the rotating drum (20), and regenerating the cutting fluid by separating the foreign matter from the collected cutting fluid. In the liquid regenerator,
The recovery tank (10) includes a first tank tank (11) and a second tank tank (12) partitioned from the first tank tank (11) via a partition plate (13). By flowing the cutting fluid into one tank tank (11), the cutting fluid gets over the partition plate (13) and flows into the second tank tank (12),
The bottom surface of the first tank tank (11) is provided with an aeration unit (40) for performing aeration on the bottom surface of the cutting fluid in the first tank tank (11),
The rotating drum (20) is provided in the second tank tank (12),
In the first tank tank (11), by aeration of the cutting fluid at the bottom surface thereof, the foreign matter floats on the liquid surface of the cutting fluid together with bubbles generated from the bottom surface, and adheres to the bubbles. , The cutting fluid is moved to the second tank tank (12) over the partition plate (13) together with the bubbles to which the foreign matter has adhered,
In the second tank tank (12), the foreign matter is adhered to the circumferential surface of the rotating rotary drum (20), thereby separating the foreign matter from the cutting fluid and supplying the cutting fluid. Regenerating and storing the regenerated cutting fluid in the second tank tank (12) ,
An upper part of the partition plate (13) has a curved shape following the circumferential curve of the rotating drum (20) . 2. The cutting fluid according to claim 1, wherein minute irregularities that improve adhesion of the bubbles are provided on the circumferential surface to which the bubbles to which the foreign matters have adhered are attached to the rotary drum. Playback device. The aeration unit (40) includes a porous member (41) laid on the entire bottom surface of the first tank tank (11), and supplies air to the porous member (41) to supply the porous member (41). The cutting fluid regenerating apparatus according to claim 1 or 2 , wherein aeration is performed by generating bubbles from (41). The aeration unit (40) is provided over the entire bottom surface of the first tank tank (11), and includes a pipe (43) having a plurality of holes (43a) on the peripheral surface. The pipe (43) The cutting fluid regenerating apparatus according to claim 1 or 2 , wherein aeration is performed by supplying air to the substrate and generating bubbles through the plurality of holes (43a). The second tank tank (12) includes an outflow channel (12a) through which the regenerated cutting fluid flows out of the second tank tank (12),
This outflow channel (12a) extends from the bottom surface of the second tank tank (12) in the direction of the liquid level of the cutting fluid in the second tank tank (12) and is bent so as to return to the bottom surface. The cutting fluid regenerating device according to any one of claims 1 to 4 , wherein the cutting fluid regenerating device has a path shape. The cutting fluid regeneration according to any one of claims 1 to 5 , wherein the scraper (30, 31) is provided on a circumferential surface and both end surfaces of the rotating drum (20). apparatus. The foreign matter includes chips and an oily substance,
An accumulation part (50) for collecting the foreign matter scraped from the rotary drum (20) by the scraper (30, 31) is provided;
The accumulation part (50) includes separation means (52, 53) for separating the chips and the oily substance using the difference in specific gravity between the chips and the oily substance in the foreign matter. cutting fluid reproducing apparatus according to any one of claims 1 to 6, characterized in that. The separation means includes a first container (53) for collecting the foreign matter,
A second container (52) provided below the first container (53);
An opening (53a) provided in the bottom surface of the first container (53);
A pipe portion (53b) provided in the first container (53), having one end connected to the opening (53a) and the other end extending upward;
Of the foreign matter collected in the first container (53), the chips are precipitated on the bottom surface of the first container (53), and the oily substance is allowed to flow to the other end of the pipe part (53b). The second container (52) is recovered from the opening on the side through the pipe (53b) and the opening (53a) of the first container (53). The cutting fluid regenerating apparatus according to claim 7 , wherein

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