JP5285439B2 - Coolant device - Google Patents

Description

  The present invention relates to a coolant device for separating chips from a dirty liquid in which chips generated during workpiece processing are mixed with coolant.

  A conventional coolant device is configured such that a scraping plate for scooping up the dirty liquid is provided on a conveyor chain that spans from the dirty liquid storage tank to the chip discharge port located obliquely above. Was common. In such a coolant device, by rotating the conveyor chain in a direction in which the scraping plate moves from the bottom of the storage tank to the discharge port, the scraping plate scrapes off the chips at the inclined portion and drops the coolant to remove the chips. And coolant are separated, and only the chips are discharged from the discharge port (see, for example, Patent Document 1).

JP 2002-177713 A

  However, in the conventional coolant device, the shape of the scraping plate and the discharge port is complicated, and fine precision is required for adjusting the scraping angle, and the conveyor chain is inclined obliquely upward with the horizontal portion in the storage tank. There is a problem that a large installation space is required in the horizontal direction. Furthermore, the conveyor chain must be constantly driven with a large load, which has led to an increase in the size of the drive mechanism.

  Accordingly, the present invention has been devised to solve the above-described problem, and an object thereof is to provide a coolant device that can save space with a simple configuration.

  The invention according to claim 1 for solving the above problem is a coolant device for separating the chips from a dirty liquid in which chips generated during machining of the workpiece are mixed with the coolant, and the upper surface of the dirty liquid A box-shaped casing having an inflow opening, a drum type filter disposed below the inflow port in the casing, and chips separated by the drum type filter disposed below the drum type filter. A chip tank to be collected, a primary clean tank that is disposed inside the drum-type filter and collects coolant that has passed through the drum-type filter, and is disposed outside the drum-type filter and below the primary clean tank A secondary clean tank storing the coolant flowing from the primary clean tank in the first clean tank; A drive mechanism for rotating the drum filter from the clean tank by utilizing the water flow flows the coolant to the secondary freshwater tank, a coolant system, characterized in that with a.

  According to such a configuration, the dirty liquid flowing in from the inlet falls onto the drum type filter, where the chips remain on the drum type filter, and only the coolant permeates the filter, and the chips and coolant. And separated. The coolant falls into the primary clean tank inside the drum filter, and then flows into the secondary clean tank and is stored, and the chips use the coolant flow that flows from the primary clean tank to the secondary clean tank. By rotating the drum type filter, it is dropped into the chip tank below and collected. As described above, according to the present invention, it is possible to separate the chips from the dirty liquid with a simple configuration as compared with the prior art, and to save the space of the apparatus. In particular, since the drum-type filter is rotated using the coolant flow, it is not necessary to provide a separate rotation drive mechanism. This can further simplify the configuration and save space.

  The invention according to claim 2 is the coolant device according to claim 1, wherein the drive shaft of the oil skimmer is connected to the rotation shaft of the drive mechanism.

  According to such a configuration, it is not necessary to separately provide an oil skimmer rotation drive mechanism, so that the configuration can be further simplified and the space can be saved.

  According to a third aspect of the present invention, the inflow port is provided with a rotation cover that rotates downward due to the weight of the dirty liquid and whose tip abuts against the outer peripheral surface of the drum type filter. The coolant device according to claim 1 or claim 2.

  According to such a configuration, since the wall surface that bridges the inlet and the drum filter is formed by the rotation cover, even if the dirty liquid falling on the drum filter is scattered, it is below the drum filter. The fall can be prevented and the coolant can be reliably collected in the clean tank.

  According to the present invention, in the coolant device, an excellent effect is achieved such that space can be saved with a simple configuration.

It is the partially broken perspective view which showed the coolant apparatus which concerns on this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG.

  The best mode for carrying out the coolant device according to the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, a case where such a coolant apparatus is installed in a bedless type machine tool having no bed below the work processing chamber area will be described as an example.

  The machine tool collects the machining unit that processes the workpiece and the dirty liquid mixed with the chips and coolant generated during the workpiece processing, separates the chips and coolant, and circulates the coolant to the workpiece processing chamber area. And a control unit for controlling the operation of the machine tool.

  According to the bedless type machine tool, there is no bed provided at the bottom of the column in a normal machine tool, so the bed does not protrude below the work processing chamber area, and the space for installing the coolant device in the vertical direction It can be secured larger than a normal machine tool.

  As shown in FIGS. 1 and 2, the coolant device 10 is disposed in a lower space of the work processing chamber area, and the dirty liquid inlet 11 facing the work processing chamber area opens on the upper surface. The casing 14 is formed. The periphery of the inflow port 11 is formed in a funnel shape so that the dirty liquid flows toward the inflow port 11. A drum-type filter 20 formed in a cylindrical shape is provided below the inflow port 11. In addition, a primary clean tank 30 that collects the coolant that has permeated through the upper portion 20a is provided inside the drum filter 20. A secondary clean tank 31 (see FIGS. 1 and 4) is provided outside the drum-type filter 20 and obliquely below the primary clean tank 30. The coolant recovered in the primary clean tank 30 flows to the secondary clean tank 31. Below the drum type filter 20, a chip tank 40 for collecting the chips separated by the drum type filter 20 is provided.

  The drum-type filter 20 is made of, for example, a metal mesh such as stainless steel, or a thin plate frame bonded with a cloth-like filter. The roughness of the eyes is, for example, # 40 mesh. The drum filter 20 is formed in a cylindrical shape by connecting both ends in the longitudinal direction of a metal mesh formed in a band shape. A rotating shaft 21 is provided inside the drum filter 20, and at one end in the axial length direction (upper right side in FIG. 1), the drum filter 20 and the rotating shaft are connected via a spoke (not shown). 21 is connected.

  As shown in FIGS. 1 and 3, the other end of the rotating shaft 21 in the axial direction (the lower left side in FIG. 1) is a turbine type that receives a coolant flow from the primary clean tank 30 to the secondary clean tank 31. The gear 22 is provided. The rotary shaft 21 is formed to extend outward from the axial end of the drum filter 20, and the gear 22 is located outside the drum filter 20. The gear 22 includes a plurality of blades 22a arranged radially and a pair of pressing plates 22b and 22b that press both sides of the blade 22a in the width direction. The blade 22a of the gear 22 receives the coolant water and rotates the rotating shaft 21. The gear 22 constitutes a drive mechanism that rotates the drum-type filter 20 using the coolant flow that flows from the primary clean tank 30 to the secondary clean tank 31.

  If the amount of coolant used is small and it is difficult to rotate the drum filter 20 with only the gear 22, it is possible to provide a motor for rotating the drum filter 20 in an auxiliary manner or manually from outside. You may comprise so that 20 may be rotated.

  In the drum type filter 20, when the workpiece is processed, the dirty liquid falls on the upper part 20 a and is placed, so that the coolant passes through the drum type filter 20 and falls downward, and the chips fall on the drum type filter 20. Leave on top. The chips on the drum-type filter 20 are dropped downward and collected in the chip tank 40 (see FIGS. 2 and 4) as the drum-type filter 20 rotates.

  As shown in FIG. 2 and FIG. 4, the chip tank 40 is formed in a box shape having an open top so as to cover the entire lower part of the drum filter 20. The chip tank 40 is provided below the drum filter 20 so as to be drawn out of the coolant device 10.

  As shown in FIGS. 1 and 2, the inlet 11 located above the drum type filter 20 is rotated downward by the weight of the dirty liquid and its tip abuts against the outer peripheral surface of the drum type filter 20. A moving cover 12 is provided. The inflow port 11 has a rectangular shape, and rotation covers 12 and 12 are provided on sides facing each other at both ends in the horizontal direction perpendicular to the axial direction of the drum filter 20. The rotation cover 12 is configured by a rectangular plate, and one side of the rotation cover 12 is rotatably supported on each side of the inflow port 11 facing each other via a spring hinge 13 (see FIG. 2). The spring hinge 13 is configured to keep the rotating cover 12 in a horizontal state (a state indicated by a two-dot chain line in FIG. 2) in a state where no dirty liquid flows and no load is applied. The spring force of the spring hinge 13 is set to an urging force such that when the dirty liquid flows on the rotation cover 12, the rotation cover 12 is rotated downward by its weight. When the rotating cover 12 is rotated downward, the lower end portion thereof has a length that contacts the outer peripheral surface of the drum filter 20 (a state indicated by a solid line in FIG. 2).

  As shown in FIGS. 1 and 4, wall surfaces 14 a and 14 b are provided close to each other at both ends in the axial length direction of the drum filter 20 at the periphery of the inflow port 11. A wall surface 14 a located on one end in the axial direction of the drum filter 20 (upper right side in FIG. 1) is formed by a part of the casing 14 of the coolant device 10 and extends to the lower portion of the coolant device 10. Is formed. A wall surface 14b located on the other end in the axial direction of the drum filter 20 (lower left side in FIG. 1) is formed in a drooping wall shape that hangs down from the upper end of the coolant device 10, and covers the falling part of the dirty liquid. The pipe 36 and the like extending from the primary clean tank 30 are not interfered with.

  As shown in FIG. 2, a scraper 24 that peels off chips adhering to the outer peripheral surface of the drum filter 20 is provided adjacent to the side of the drum filter 20. The scraper 24 has a length equivalent to the axial length of the drum filter 20. The scraper 24 is provided at a portion where the surface of the drum filter 20 rotates upward. The scraper 24 has a tip close to the surface of the drum filter 20, and scrapes off the chips adhering to the surface of the drum filter 20 to drop them. The scraper 24 is disposed above the opening of the chip tank 40, and the scraped chips are collected in the chip tank 40. The installation position of the scraper 24 is not limited to the above position.

  On the other hand, an air blow device 25 that blows away chips adhering to the outer peripheral surface of the drum filter 20 from the inside is provided inside the drum filter 20. The air blow device 25 includes a blow pipe 26 provided below the rotary shaft 21 and compressed air supply means (not shown) for supplying compressed air to the blow pipe 26. Through holes (not shown) are formed in the blow pipe 26 at a predetermined pitch over the entire length of the drum filter 20 in the axial direction, and compressed air is blown out from the through holes. The through hole is formed in the lower part of the blow pipe 26 and is configured to blow off chips from the inside of the drum type filter 20 downward. The blown off chips fall into the lower chip tank 40 and are collected.

  As shown in FIGS. 1 to 4, the primary clean tank 30 is disposed above the rotating shaft 21 inside the drum filter 20. The primary clean tank 30 has a shallow box shape with an open top, and has a rectangular shape in plan view. The long side of this rectangle has a length equivalent to the axial length of the drum filter 20. The short side of the rectangle is the tip of the rotating covers 12 and 12 when the pair of rotating covers 12 and 12 provided at the inlet 11 rotate downward and come into contact with the outer peripheral surface of the drum filter 20. It has a length equal to or longer than the distance between them. As a result, the primary clean tank 30 covers at least the entire area below the dirty liquid drop region at the top of the drum filter 20.

  A pipe 36 extending above the secondary clean tank 31 is connected to the side surface of the primary clean tank 30 on the side where the gear 22 is disposed, penetrating the side surface. The tip of the pipe 36 is bent downward and opens downward. The opening at the tip of the pipe 36 is located above the secondary clean tank 31 and above the blade 22 a eccentric from the center of the waterwheel gear 22 at the end of the rotating shaft 21. With such a configuration, the coolant in the primary clean tank 30 passes through the pipe 36 and flows down from the tip thereof, rotates the gear 22, and then flows down to the secondary clean tank 31 below.

  The secondary clean tank 31 is disposed side by side on the side of the chip tank 40 below the drum filter 20. The secondary clean tank 31 has a box shape with an open top and receives coolant flowing down from the pipe 36. The secondary clean tank 31 is formed with a larger capacity than the primary clean tank 30 and stores coolant. The secondary clean tank 31 is provided with a pump for circulating the coolant to the work processing chamber area.

  An oil skimmer 32 that collects floating oil such as driving oil mixed in the coolant is provided on the upper portion of the secondary clean tank 31. The oil skimmer 32 rotates the metal or resin belt 32a from the top of the coolant to the inside, so that the floating oil on the surface is entangled with the belt 32a and collected. In the present embodiment, the drive shaft 32 b of the belt 32 a is disposed in parallel with the rotation shaft 21 of the drum filter 20 and is connected via a connection gear 33. As a result, the oil skimmer 32 is driven to rotate simultaneously with the rotation of the drum-type filter 20. The rotation of the belt 32a is not limited to the above-described configuration, and may be rotated by providing a separate drive rotation mechanism.

  As shown in FIG. 1, a liquid level gauge 34 is provided on the upper portion of the secondary clean tank 31 so that the amount of coolant in the tank can be detected. Further, a low-pressure tank 35a and an intermediate-pressure tank 35b are provided on the upper portion of the secondary clean tank 31, and are used for operations such as feeding coolant into the work processing chamber area.

  Next, the operation of the coolant device when machining a workpiece using a machine tool will be described.

  When machining a workpiece with a machine tool, the pump is operated by the low-pressure tank 33a and the intermediate-pressure tank 33b, and the coolant is circulated and supplied to the workpiece machining chamber area.

  At this time, coolant and chips fall onto the coolant device 10 below. Then, the dirty liquid in which the chips are mixed with the coolant flows from the inclined portion at the top of the coolant device 10 to the inlet 11. Then, when the dirty liquid flows on the rotating cover 12 of the inflow port 11, the rotating cover 12 is rotated downward by the weight of the dirty liquid, as shown in FIG. It falls on the upper surface of 20a. At this time, the lower end of the rotation cover 12 abuts on the surface of the drum filter 20 and forms wall surfaces on both sides in the moving direction of the drum filter 20. Together with this, the wall surfaces 14 a and 14 b are close to both ends of the drum filter 20 in the axial length direction. As a result, the periphery of the dirty liquid falling region of the drum type filter 20 is covered with the wall surface, and even if the falling dirty liquid jumps up, it can be prevented from falling below the drum type filter 20. .

  Then, from the dirty liquid that has fallen on the drum type filter 20, the coolant passes through the drum type filter 20 and falls to the primary clean tank 30. At this time, since the dirty liquid does not fall below the drum filter 20 as described above, it can be reliably collected in the primary clean tank 30. The coolant that has fallen into the primary clean tank 30 flows to the secondary clean tank 31 and is stored. The coolant stored in the secondary clean tank 31 is freed of floating oil by the oil skimmer 32 to become clean coolant, and is sent to the workpiece processing chamber area by a pump operated by the low pressure tank 33a and the intermediate pressure tank 33b.

  When the coolant flows from the primary clean tank 30 to the secondary clean tank 31, the gear 22 is rotated and the drum filter 20 is rotated. At this time, the distal end of the rotating cover 12 is in contact with the outer peripheral surface of the drum type filter 20, but the outer peripheral surface of the drum type filter 20 slides and rotates with respect to the distal end of the rotating cover 12. The chips left on the drum filter 20 are stored in the vicinity of the rotating cover 12 located on the front side in the rotation direction. After that, when the machining of the workpiece is stopped, the rotating cover 12 is no longer loaded with the dirty liquid and returns to the original horizontal state. At this time, the drum type filter 20 is rotated by the flow of the coolant remaining in the primary clean tank 30 to the secondary clean tank 31, and the chips fall downward and are collected in the chip tank 40.

  The chips adhering to the surface without falling down from the drum filter 20 are blown down by the air blow device 25 and collected into the chip tank 40. Furthermore, the chips that have not fallen even by the air blow device 25 are scraped off by the scraper 24 provided on the downstream side and collected into the chip tank 40. When a predetermined amount of chips accumulates in the chip tank 40, the chip tank 40 is taken out to discharge the chips.

  As described above, according to the coolant device 10 according to the present embodiment, the dirty liquid flowing from the inlet 11 falls on the drum type filter 20, and the chips remain on the drum type filter there. Only permeate the drum filter 20 and is separated into chips and coolant. Therefore, the coolant device 10 according to the present embodiment uses very little energy compared to a conventional scraping type conveyor. Further, in the present invention, the drum type filter 20 is rotated using the coolant water flow, so that the rotation drive mechanism can be omitted. Further, although the chips are dropped in the chip tank 40 below by rotating the drum filter 20, the rotational load is very small, so that the chips can be obtained by a coolant flow. Therefore, according to the coolant device 10 according to the present embodiment, it is possible to achieve simplification and energy saving of the rotary drive mechanism.

  Furthermore, the coolant device 10 is generally provided with a chip tank 40 below the drum filter 20, and space for installing the drum filter 20 and the secondary clean tank 31 is sufficient. Can be achieved.

  Further, since the drive shaft 32b of the belt 32a of the oil skimmer 32 is connected to the rotary shaft 21 of the drum type filter 20, it is not necessary to provide a separate rotation drive mechanism for the oil skimmer 32. This simplifies the configuration and saves space.

  Further, by providing the scraper 24 and the air blow device 25, the chips can be reliably dropped and efficiently recovered. Furthermore, since the chips adhering to the drum type filter 20 can be removed, it is possible to prevent a decrease in the coolant permeability at the dirty liquid dropping position of the upper part 20a of the drum type filter 20.

  Further, since the rotation cover 12 is provided at the inflow port 11, a wall surface is formed around the area where the dirty liquid falls, so that even if the dirty liquid falling on the drum type filter 20 is scattered, the drum type It can prevent falling below the filter 20, and the coolant can be reliably collected in the primary clean tank 30.

  The best embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and it is needless to say that the design can be changed as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, the case where the present invention is applied to the bedless type machine tool 1 has been described as an example, but it is needless to say that the present invention can also be applied to a normal machine tool provided with a bed. Also in this case, the effect that the space saving of the coolant device can be achieved can be obtained.

  Further, in this embodiment, the coolant is caused to flow from the pipe 36 above the waterwheel gear 22 and the rotation shaft 21 orthogonal to the coolant flow direction is rotated via the gear 22. The structure which rotates 21 is not limited to this. For example, a propeller-type water wheel may be provided, and a rotational shaft parallel to the coolant flow direction may be rotated to transmit the rotational force to the rotational shaft 21 via a gear.

DESCRIPTION OF SYMBOLS 10 Coolant apparatus 11 Inlet 12 Rotating cover 14 Casing 20 Drum type filter 21 Rotating shaft 30 Primary clean tank 31 Secondary clean tank 32 Oil skimmer 32b Drive shaft 40 Chip tank

Claims (3)

A coolant device for separating the chips from a dirty liquid in which chips generated during workpiece processing are mixed with the coolant,
A box-shaped casing having an inlet for the dirty liquid opened on the upper surface;
A drum-type filter disposed below the inflow port in the casing;
A chip tank disposed below the drum filter and collecting chips separated by the drum filter;
A primary clean tank that is disposed inside the drum type filter and collects coolant that has passed through the drum type filter;
A secondary clean tank that is disposed outside the drum-type filter and stores the coolant that flows from the primary clean tank below the primary clean tank;
And a drive mechanism for rotating the drum-type filter by using a water flow of the coolant flowing from the primary clean tank to the secondary clean tank. The coolant device according to claim 1, wherein a drive shaft of an oil skimmer is connected to a rotation shaft of the drive mechanism. 3. The rotation cover that rotates downward by the weight of the dirty liquid and has a tip abutting against the outer peripheral surface of the drum-type filter is provided at the inflow port. 4. Coolant device.

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