JP2010167534A - Chip processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve simplification and space-saving of a chip processing device. <P>SOLUTION: The chip processing device includes: a dirty-liquid storage tank 20 for storing dirty liquid; a casing pipe 30 that is at least partially composed of a cylindrical filter 31 and arranged in a longitudinal direction while its lower end is located inside the dirty-liquid storage tank 20; a rotating screw 40 that is inserted into the inside of the casing pipe 30 and whose lower end extends to the inside of the dirty-liquid storage tank 20 and whose upper end extends upwardly from the upper end of the casing pipe 30, and further, whose outer periphery is brought close to the inner-peripheral face of the casing pipe 30; a coolant recovery tank 50 that is provided around the casing pipe 30 and pushed up by the rotating screw 40 so as to recover a coolant permeating through from the inside to the outside of the cylindrical filter 31; and a chip discharge port 60 for discharging chips pushed up upwardly inside the casing pipe 30 by the rotating screw 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a chip processing apparatus that separates chips from a dirty liquid in which chips generated during machining of a workpiece are mixed with coolant.

  A conventional chip processing apparatus is configured such that a scraper plate that pushes up dirty liquid is provided on a conveyor chain that spans from a dirty liquid storage tank to a chip discharge port located obliquely above. Was common. In such a chip processing apparatus, by rotating the conveyor chain in the direction in which the scraping plate moves from the bottom of the storage tank to the discharge port, the scraping plate pushes up the chips at the inclined portion and drops the coolant to cut 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 chip processing apparatus, the shape of the scraping plate and the discharge port is complicated, and fine precision is necessary 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 an inclined portion is required and 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 problems, and an object thereof is to provide a chip processing apparatus that can save space with a simple configuration.

  The invention according to claim 1 for solving the above-described problem is a chip processing apparatus that separates the chips from a dirty liquid in which chips generated during machining of the workpiece are mixed with the coolant. A liquid storage tank, and at least a part of which is configured by a cylindrical filter, and a casing pipe disposed in a vertical direction with a lower end located in the dirty liquid storage tank, and inserted into the casing pipe, A rotating screw whose lower end extends into the dirty liquid storage tank and whose upper end extends upward from the upper end of the casing pipe, and whose outer peripheral portion is close to the inner peripheral surface of the casing pipe, and the casing pipe A cooler which is provided around and is pushed up by the rotating screw and permeates from the inside to the outside of the cylindrical filter. A coolant recovery tank for recovering the dust, and a chip discharge port for discharging the chips pushed up inside the casing pipe by the rotary screw, and rotating the rotary screw to rotate the rotary screw. Dirty liquid is raised in the casing pipe, the coolant is permeated from the inside to the outside of the cylindrical filter and collected in the coolant collecting tank, and the chips are discharged from the upper end of the casing pipe to the chips discharge port. The chip processing apparatus is characterized in that it is discharged through the chip.

  According to such a configuration, the screw conveyor is configured by the casing pipe and the rotating screw, and the dirty liquid rises in the casing pipe by rotating the rotating screw. At this time, the coolant is supplied from the inside of the cylindrical filter. Since it passes through the outside and is recovered in the coolant recovery tank, and the chips are discharged from the upper end portion of the casing pipe through the chip discharge port, the chips and the coolant can be efficiently separated. Moreover, since the casing pipe and the rotating screw are arranged in the vertical direction, the plane area of the apparatus can be reduced. Therefore, according to the present invention as described above, 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.

  According to a second aspect of the present invention, there is provided a chip processing apparatus for separating the chips from a dirty liquid in which chips generated during workpiece processing are mixed with a coolant, and a dirty liquid storage tank for storing the dirty liquid, and the dirty liquid. An outer peripheral wall that surrounds the rotary cylindrical filter with a predetermined gap between the rotary cylindrical filter disposed in the vertical direction with the lower end positioned in the liquid storage tank and the outer peripheral surface of the rotary cylindrical filter And a spiral blade that surrounds the rotating cylindrical filter and is formed along the inner peripheral surface of the outer peripheral wall, and is provided at the inner lower portion of the rotating cylindrical filter from the outside to the inside of the rotating cylindrical filter. A coolant recovery port for recovering the permeated coolant and a chip discharge port for discharging the chips, and rotating the rotating cylindrical filter A swirling airflow is generated in the gap, and the swirling airflow pushes up the chips along the spiral blades and discharges the chips from the upper end portion thereof through the chip discharge port, and the coolant is used in the rotating cylindrical type. It is a chip processing apparatus characterized in that the filter is made to permeate from the outside to the inside and is collected from the coolant collecting port.

  According to such a configuration, the rotating cylindrical filter is rotated to generate a swirling airflow in the gap between the rotating cylindrical filter and the outer peripheral wall, so that the chips are pushed up along the spiral blades and the upper end portion thereof. Since the coolant is discharged from the outside through the chip discharge port and the coolant permeates from the outside to the inside of the rotary cylindrical filter and is recovered from the coolant recovery port, the chip and the coolant can be efficiently separated. Further, since the rotating cylindrical filter and the spiral blade are arranged in the vertical direction, the plane area of the apparatus can be reduced. Therefore, according to the present invention as described above, 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.

  According to the present invention, the chip processing apparatus exhibits an excellent effect that a space can be saved with a simple configuration.

It is the perspective view which showed the chip processing apparatus which concerns on 1st embodiment. It is the sectional view on the AA line of FIG. It is the partially broken perspective view which showed the modification of the chip processing apparatus which concerns on 1st embodiment. It is a principal part expanded sectional view which showed the chip processing apparatus which concerns on 2nd embodiment.

(First embodiment)
A first embodiment of a chip processing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the case where the chip processing 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. The chip processing apparatus is installed below the work processing chamber area.

  As shown in FIGS. 1 and 2, the chip processing apparatus 1 includes a casing 10 in which an inlet 11 for dirty liquid is formed. In the casing 10, a dirty liquid storage tank 20 (see FIG. 2) for storing dirty liquid, a casing pipe 30 having a lower end positioned in the dirty liquid storage tank 20 and arranged in the vertical direction, and the casing A rotary screw 40 inserted into the pipe 30 and a coolant recovery tank 50 (see FIG. 2) provided around the casing pipe 30 are provided. Further, a chip discharge port 60 (see FIG. 2) for discharging chips is formed in the casing 10. In the casing 10, a chip discharge path 61 (see FIG. 2) connected from the upper end portion of the rotary screw 40 to the chip discharge port 60 is formed.

  The inflow port 11 is formed in the upper surface of the casing 10, and is opened facing the workpiece processing chamber area. The periphery of the inflow port 11 is inclined in a funnel shape so that the dirty liquid flows toward the inflow port 11.

  As shown in FIG. 2, the dirty liquid storage tank 20 is formed to extend laterally from below the inflow port 11. The lateral position is a position that does not interfere with the falling dirty liquid. The bottom surface 21 of the dirty liquid storage tank 20 is formed to be inclined so as to become lower from the lower position of the inflow port 11 toward the side position. The inclination angle of the bottom surface 21 is set so that the chips that have fallen into the dirty liquid storage tank 20 can flow to the side position and move.

  The casing pipe 30 is arranged extending in the vertical direction so that the lower end portion is located in the dirty liquid storage tank 20 at the side position of the dirty liquid storage tank 20. The casing pipe 30 is fixed to a fixed side that is connected to the casing 10. The casing pipe 30 is at least partially composed of a cylindrical filter 31. In this embodiment, the part which protrudes upward from the dirty liquid storage tank 20 is comprised with the cylindrical filter 31, and the part which protrudes in the dirty liquid storage tank 20 toward the downward part of the lower part is without a mesh | network. A cylindrical body 32 is used. The cylindrical filter 31 is made of, for example, a metal mesh such as stainless steel, or a thin plate frame bonded with a cloth filter, and the roughness of the eyes is, for example, # 40 mesh. The lower end of the casing pipe 30 (the lower end of the cylindrical body 32) is configured to leave a predetermined gap with the bottom surface 21 of the dirty liquid storage tank 20, and the chips flow through the gap below the casing pipe 30 and move. Come on. In addition, in this embodiment, although the part which protrudes upwards from the dirty liquid storage tank 20 of the casing pipe 30 is comprised by the cylindrical filter 31, it is not limited to this. For example, the boundary portion between the cylindrical filter 31 and the cylindrical body 32 may be moved up and down from the present embodiment, or the entire casing pipe 30 may be configured by the cylindrical filter 31.

  The rotary screw 40 is inserted into the casing pipe 30 such that the upper end protrudes upward from the casing pipe 30 and the lower end protrudes downward from the casing pipe 30. The rotary screw 40 includes a columnar shaft 41a extending in the vertical direction and a spiral blade 41b formed in a spiral shape along the outer peripheral surface of the shaft 41a. The lower end portion of the shaft 41 a is pivotally supported by a bearing 43 embedded in the bottom surface 21 of the dirty liquid storage tank 20. The upper end portion of the shaft 41 a is pivotally supported by a bearing 44 provided on the top plate portion 12 of the casing 10. A motor 45 connected to the shaft 41 a is provided on the bearing 44 and is configured to rotate the rotary screw 40 by driving the motor 45.

  The spiral blade 41b is fixed to the outer peripheral surface of the shaft 41a and rotates integrally with the shaft 41a. The spiral blade 41 b is configured such that the outer peripheral portion thereof is close to the inner peripheral surface of the casing pipe 30, and pushes up the chips in the casing pipe 30 by the rotation of the rotary screw 40. The lower end of the spiral blade 41b extends so as to be close to the bottom surface 21 of the dirty liquid storage tank 20, and scoops up the chips on the bottom surface 21. The upper end of the spiral blade 41 b extends a predetermined length to a position above the upper end of the casing pipe 30, and is configured to push out the chips pushed up by the rotation of the rotary screw 40 into the chip discharge path 61. ing.

  According to the casing pipe 30 and the rotating screw 40 having the above-described configuration, a combination of these serves as a screw conveyor.

  The coolant recovery tank 50 is formed so as to surround the casing pipe 30, and recovers the coolant that is pushed up by the rotary screw 40 and permeates from the inside to the outside of the cylindrical filter 31. One end of a coolant delivery channel 51 is open on the bottom surface of the coolant recovery tank 50. The other end of the coolant delivery channel 51 is open to the outside of the casing 10, and is connected to a clean tank (not shown) via a delivery pipe (not shown) connected to the other end of the coolant delivery channel 51. Coolant is allowed to flow. A plate material 53 connected to the upper end portion of the casing pipe 30 is provided at the upper portion of the coolant recovery tank 50. The plate material 53 is formed so as to cover the entire upper part of the coolant recovery tank 50, and is configured so that chips pushed out from the upper end of the casing pipe 30 do not fall into the coolant recovery tank 50. The plate 53 is inclined so as to become lower toward the chip discharge port 60 and is configured to guide the chips toward the chip discharge port 60.

  The chip discharge port 60 is formed to open to the outside of the casing 10 obliquely below the upper end of the casing pipe 30. A space between the upper end portion of the casing pipe 30 and the chip discharge port 60 is a chip discharge path 61. The chip discharge port 60 is formed at a predetermined height, and below the chip discharge port 60, a chip tank 55 for collecting chips is movably provided. The chip tank 55 is formed in a box shape with an upper surface opened.

  Although not shown, an air blowing device that blows air toward the cylindrical filter 31 may be provided inside the coolant recovery tank 50. In this way, by blowing air from the coolant recovery tank 50 side toward the cylindrical filter 31, the chips adhering to the inner peripheral surface of the cylindrical filter 31 can be blown inward, and the cylindrical filter 31. It is possible to prevent the coolant permeability in the cylindrical filter 31 from being reduced.

  Next, operation | movement of the chip processing apparatus 1 at the time of processing a workpiece | work is demonstrated.

  When machining a workpiece, the spindle holding the tool is operated while supplying coolant to the workpiece machining chamber area. When the workpiece is processed in this manner, coolant and chips (dirty liquid) are dropped and stored from the inlet 11 of the chip processing apparatus 1 below the workpiece processing chamber area to the dirty liquid storage tank 20. At this time, the chips in the dirty liquid flow and move below the casing pipe 30 at the side position where the rotary screw 40 is located due to the inclination of the bottom surface 21 of the dirty liquid storage tank 20.

  When a predetermined amount of dirty liquid accumulates in the dirty liquid storage tank 20, the motor 45 is driven to rotate the rotary screw 40. Then, the coolant and chips near the lower end of the casing pipe 30 are scooped up by the spiral blade 41 b of the rotary screw 40 and enter the casing pipe 30. The coolant and chips that have entered the interior are pushed upward by the rotation of the spiral blade 41 b of the rotary screw 40 while being guided by the inner peripheral surface of the casing pipe 30. In addition, in FIG. 2, although the chip is described small so that the internal rotary screw 40 can be seen, the inside of the casing pipe 30 is actually covered with the chip.

  When the dirty liquid rises in the casing pipe 30, the coolant permeates from the inside to the outside of the cylindrical filter 31 and is collected in the coolant collection tank 50, via the coolant delivery channel 51 and the delivery pipe (not shown). Then, it is poured into a clean tank (not shown) and stored. After the chips are pushed up inside the casing pipe 30 by the rotary screw 40, the chips are guided from the upper end portion of the casing pipe 30 to the inclined plate member 53 and flow to the chip discharge port 60. Then, it is discharged from the chip discharge port 60 and collected in the chip tank 55. Thus, when the dirty liquid is raised, the coolant passes through the cylindrical filter 31. At this time, the chips are pushed up against the gravity, whereas the coolant flows downward due to the gravity. Separation performance of powder and coolant is greatly improved.

  As described above, according to the chip processing apparatus 1 according to the present embodiment, the chips and the coolant can be separated efficiently and reliably. Moreover, according to this embodiment, since the casing pipe 30 and the rotary screw 40 are arrange | positioned in the vertical direction, the installation space of an apparatus becomes small and a plane area can be made small. Therefore, according to the present invention as described above, 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.

  By the way, according to the bedless type machine tool, there is no bed provided in the lower part of the column in a normal machine tool, so the bed does not protrude below the work processing chamber area, and the chip processing device It is possible to secure a larger installation space than a normal machine tool. In the chip processing apparatus 1 of the present embodiment, since the plane area is reduced by arranging the casing pipe 30 and the rotating screw 40 in the vertical direction, the bedless can ensure a large installation space for the chip processing apparatus in the vertical direction. Suitable for installation on types of machine tools.

  Next, a modification of the chip processing apparatus according to the first embodiment will be described in detail with reference to FIG. Such a chip processing apparatus is different from the chip processing apparatus 1 of the first embodiment in that the casing pipe has a double tube structure.

  As shown in FIG. 3, the chip processing apparatus includes an inner casing pipe 110 and an outer casing pipe 120. The inner casing pipe 110 is fixed to a fixed side connected to a casing (not shown). The inner casing pipe 110 is at least partially configured with a cylindrical filter 111. In the present embodiment, a portion that protrudes upward from a dirty liquid storage tank (not shown) is configured by the cylindrical filter 111. A portion of the lower part of the cylindrical filter 111 that protrudes downward into the dirty liquid storage tank is constituted by a cylindrical body 112 having no mesh. The cylindrical filter 111 is made of, for example, a metal mesh such as stainless steel, or a thin plate frame bonded with a cloth-like filter, and the roughness of the eyes is a cylindrical shape that forms the outer casing pipe 120. The filter 121 is configured to be coarser than the roughness of the eyes. The lower end of the inner casing pipe 110 (the lower end of the cylindrical body) is configured to leave a predetermined gap with the bottom surface of the dirty liquid storage tank, and the chips flow below the inner casing pipe 110 through this gap. And move.

  A chip recovery path (not shown) is connected to the upper end portion of the inner casing pipe 110 and is configured to recover the chips pushed up in the inner casing pipe 110.

  A rotary screw 130 is rotatably provided inside the inner casing pipe 110. The rotary screw 130 has substantially the same shape as the rotary screw 40 (see FIG. 2), and has an upper end protruding upward from the inner casing pipe 110 and a lower end protruding downward from the inner casing pipe 110. It is inserted into the inner casing pipe 110. The rotary screw 130 includes a columnar shaft 131a extending in the vertical direction and a spiral blade 131b formed in a spiral shape along the outer peripheral surface of the shaft 131a. The shaft 131a is rotatably supported by bearings (not shown) at upper and lower ends thereof, and is configured to rotate the rotary screw 130 by a motor (not shown).

  The spiral blade 131b is fixed to the outer peripheral surface of the shaft 131a and rotates integrally with the shaft 131a. The spiral blade 131 b is configured such that the outer peripheral portion thereof is close to the inner peripheral surface of the inner casing pipe 110, and the chips are pushed up in the inner casing pipe 110 by the rotation of the rotary screw 130. The lower end of the spiral blade 131b extends so as to be close to the bottom surface of the dirty liquid storage tank, and the chips accumulated on the bottom surface are scooped up.

  The outer casing pipe 120 is configured by a cylindrical filter 121 arranged at a predetermined interval from the outer peripheral surface of the cylindrical filter 111. The cylindrical filter 121 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. A bottom surface 122 for closing the lower end of the cylindrical filter 121 is formed between the lower end of the cylindrical filter 121 and the outer peripheral surface of the cylindrical filter 111 inside. The bottom surface 122 is made of an annular plate material without a mesh. The bottom surface 122 is formed so as to be flush with the bottom surface of a coolant recovery tank (not shown) formed outside the outer casing pipe 120. As a result, the coolant that has passed through the cylindrical filter 111 and the cylindrical filter 121 from the inside of the inner casing pipe 110 and has flowed to the outside of the outer casing pipe 120 is recovered in the coolant recovery tank.

  A chip recovery path (not shown) is formed at the upper end of the outer casing pipe 120 so as to recover the chips pushed up in the outer casing pipe 120. This recovery path is preferably formed as a separate path from the recovery path formed at the upper end of the inner casing pipe 110.

  A shaftless spiral blade 140 is provided inside the outer casing pipe 120 and between the outer peripheral surface of the inner casing pipe 110. The spiral blade 140 is disposed so that the upper end protrudes upward from the outer casing pipe 120. A rotating mechanism (not shown) is provided on the upper portion of the spiral blade 140 and is configured to rotate coaxially with the rotating screw 40. The spiral blade 140 is configured such that its inner peripheral portion is close to the outer peripheral surface of the inner casing pipe 110 and its outer peripheral portion is close to the inner peripheral surface of the outer casing pipe 120. The powder is pushed up in the outer casing pipe 120. The lower end of the spiral blade 140 extends so as to be close to the bottom surface 122 of the outer casing pipe 120, and the chips accumulated on the bottom surface 122 are scooped up.

  Since other configurations are the same as those in the first embodiment, description thereof will be omitted.

  Next, the operation of the chip processing apparatus 101 when processing a workpiece will be described.

  When the workpiece is processed, the coolant and the chips (dirty liquid) are stored in the dirty liquid storage tank of the chip processing apparatus 101, and the chips in the dirty liquid are moved into the inner casing pipe by the inclination of the bottom surface of the dirty liquid storage tank. It moves down to 110 and moves.

  When a predetermined amount of dirty liquid is stored in the dirty liquid storage tank, the rotating screw 130 and the spiral blade 140 are rotated. Then, the coolant and chips near the lower end of the inner casing pipe 110 are scooped up by the spiral blade 131 b of the rotary screw 130 and enter the inner casing pipe 110. The coolant and chips that have entered the interior are pushed upward by the rotation of the spiral blade 131 b of the rotary screw 130 while being guided by the inner peripheral surface of the inner casing pipe 110.

  When the dirty liquid rises in the inner casing pipe 110, the coolant permeates from the inside to the outside of the cylindrical filter 111 and flows into the outer casing pipe 120. At this time, of the chips, chips larger than the size of the cylindrical filter 111 of the inner casing pipe 110 are left inside the inner casing pipe 110, while the chips smaller than the eyes of the cylindrical filter 111 are left. The powder permeates from the inside to the outside of the cylindrical filter 111 and falls to the inside of the outer casing pipe 120. The large chips left inside the inner casing pipe 110 are pushed up in the inner casing pipe 110 by the rotation of the rotary screw 130, and are discharged and recovered from the upper end portion of the inner casing pipe 110 through the chip recovery path. .

  Inside the outer casing pipe 120, coolant and chips (small chips) that have entered between the outer casing pipe 120 and the inner casing pipe 110 are pushed upward by the rotation of the spiral blades 140. At this time, the coolant passes through the cylindrical filter 121 and is recovered in the coolant recovery tank, and then flows and stored in a clean tank (not shown). The chips are pushed up between the inner casing pipe 110 and the outer casing pipe 120 by the rotation of the spiral blades 140, and discharged from the upper end of the chips through the chip collection path and collected. Here, since the recovery path connected to the inner casing pipe 110 and the recovery path connected to the outer casing pipe 120 are formed in different paths, the recovery path connected to the inner casing pipe 110 is not used. Large chips are collected, and small chips are collected through a collection path connected to the outer casing pipe 120. Thus, according to this embodiment, in addition to obtaining the same effects as those of the above-described embodiment, it is possible to classify and collect chips according to size.

(Second embodiment)
Next, a second embodiment of the chip processing apparatus according to the present invention will be described in detail with reference to FIG.

  As shown in FIG. 4, the chip processing apparatus 201 according to the second embodiment includes a dirty liquid storage tank 20 for storing dirty liquid and a dirty liquid storage tank in a casing 210 in which an inlet 11 for dirty liquid is formed. 20, an outer periphery that surrounds the rotary cylindrical filter 230 with a predetermined gap 234 between the rotary cylindrical filter 230 having a lower end located in the vertical direction and the outer peripheral surface 231 of the rotary cylindrical filter 230. A spiral blade 240 that surrounds the wall 232 and the rotary cylindrical filter 230 and is formed along the inner peripheral surface 233 of the outer peripheral wall 232, and the rotary cylindrical filter 230 provided at the inner lower portion of the rotary cylindrical filter 230. A coolant recovery port 250 for recovering the coolant permeated from the outside to the inside, and a chip discharge port 60 for discharging chips It is equipped with a. The chip processing apparatus 201 as described above generates a swirling airflow in the gap 234 by rotating the rotating cylindrical filter 230, and the swirling airflow pushes up the chips along the spiral blades 240 from the upper end thereof. While discharging through the chip discharge port 60, the coolant collides with the inner peripheral surface 233 of the outer peripheral wall 232, reflects the coolant inward, and transmits the coolant from the outer side to the inner side of the rotating cylindrical filter 230. It comes to collect.

  Since the inflow port 11, the dirty liquid storage tank 20, and the chip discharge port 60 have the same configuration as that of the first embodiment, the same reference numerals are given and description thereof is omitted.

  The rotating cylindrical filter 230 is arranged extending in the vertical direction at a side position of the dirty liquid storage tank 20. The rotating cylindrical filter 230 is provided so as to be rotatable with respect to the casing 210. The upper end portion of the rotary cylindrical filter 230 is formed to extend to the vicinity of the top plate portion 12 of the casing 210. The rotating cylindrical filter 230 is made of, for example, a metal mesh such as stainless steel, or a thin plate frame having a cloth filter attached thereto, and the roughness of the eyes is, for example, # 40 mesh. A bottomed cylindrical body 235 having no mesh is provided below the rotating cylindrical filter 230, and an upper end surface 236 is formed at the upper end. The bottomed cylindrical body 235 is located in the dirty liquid storage tank 20. A lower rotating shaft 235a extending downward is connected to the bottom surface of the bottomed cylindrical body 235, and an upper rotating shaft 236a extending upward is connected to the upper end surface 236. The lower rotating shaft 235 a is pivotally supported by a bearing 43 whose lower end is embedded in the bottom surface 21 of the dirty liquid storage tank 20. The upper rotary shaft 236 a is pivotally supported by a bearing 44 provided at the top plate portion 12 of the casing 210 at the upper end thereof. A motor 45 connected to the upper rotating shaft 236 a is provided on the bearing 44, and is configured to rotate the rotating cylindrical filter 230 and the bottomed cylindrical body 235 by driving the motor 45. .

  A coolant recovery port 250 is formed on the bottom surface of the bottomed cylindrical body 235. The coolant recovery port 250 is formed at the center of the bottom surface of the bottomed cylindrical body 235 and communicates with a coolant recovery flow path 235b formed inside the lower rotary shaft 235a connected to the lower portion of the bottomed cylindrical body 235. ing. The coolant recovery channel 235 b is formed so as to penetrate from the upper end to the lower end of the lower rotating shaft 235 a and communicates with the coolant delivery channel 212 formed in the casing 210. The end of the coolant delivery channel 212 is open to the outside of the casing 210, and the coolant is supplied to a clean tank (not shown) via a delivery pipe (not shown) connected to the coolant delivery channel 212. It is like that.

  The outer peripheral wall 232 includes a cylindrical inner peripheral surface 233 with a predetermined gap 234 between the outer peripheral surface 231 of the rotating cylindrical filter 230. In the present embodiment, the outer peripheral wall 232 is configured by a part of the casing 210. The chip discharge path 61 side of the upper end part of the outer peripheral wall 232 is open, and is configured to communicate with the chip discharge port 60 via the chip discharge path 61.

  The spiral blade 240 is fixed to the inner peripheral surface 233 of the outer peripheral wall 232, and the inner peripheral surface is configured to be close to the outer peripheral surface 231 of the rotating cylindrical filter 230. The lower end of the spiral blade 240 is located in the dirty liquid storage tank 20 and is located at the same height as the bottom surface of the bottomed cylindrical body 235 below the rotating cylindrical filter 230. In addition, the upper end of the spiral blade 240 extends to a position that is a predetermined length higher than the upper end of the outer peripheral wall 232 (the lower end position of the opening on the chip discharge path 61 side). The pushed-up chips are configured to be pushed out to the chip discharge path 61.

  According to the rotating cylindrical filter 230, the outer peripheral wall 232, and the spiral blade 240 configured as described above, a combination of these functions serves as a cyclonic separator. Since other configurations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

  Next, the operation of the chip processing apparatus 201 when processing a workpiece will be described.

  When the workpiece is processed, the coolant and the chips (dirty liquid) are stored in the dirty liquid storage tank 20 of the chip processing apparatus 201, and the chips in the dirty liquid are inclined by the inclination of the bottom surface 21 of the dirty liquid storage tank 20. The rotary cylindrical filter 230 and the spiral blade 240 flow downward and move.

  When a predetermined amount of dirty liquid is stored in the dirty liquid storage tank 20, the rotating cylindrical filter 230 is rotated. Then, a swirling airflow (indicated by a thick arrow in FIG. 4) is generated in the gap 234 between the outer peripheral surface 231 of the rotating cylindrical filter 230 and the inner peripheral surface 233 of the outer peripheral wall 232. With this swirling wind, the dirty liquid is rotated, and the chips are gradually pushed up on the spiral blades 240 to rise. And when it raises to the upper end of the outer peripheral wall 232, since a swirling wind flow flows to the chip discharge path 61 and the chip discharge port 60 side, chip is also blown to the chip discharge port 60 in connection with it. Fall. The chips falling to the chip discharge port 60 are collected in the chip tank 55 below the chips. At the same time, the coolant collides with the inner peripheral surface 233 of the outer peripheral wall 232 by the swirling wind flow, is reflected inward, and passes through the rotating cylindrical filter 230 from the outer side to the inner side. Thereafter, the coolant flows from the coolant recovery port 250 to the coolant recovery passage 235b, and flows to the coolant in a clean tank (not shown) via the coolant delivery passage 212 and the delivery pipe (not shown).

  As described above, according to this embodiment, it is possible to efficiently separate the chips and the coolant. Further, since the rotating cylindrical filter 230 and the spiral blade 240 are arranged in the vertical direction, the plane area of the apparatus can be reduced. Therefore, according to the present invention as described above, 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 the above-described embodiment, the outer peripheral wall 232 is configured by a part of the casing 210, but a cylindrical wall body may be provided separately.

  The embodiment of the present invention has been described above. However, 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 a bedless type machine tool 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 having a bed.

DESCRIPTION OF SYMBOLS 1 Chip processing apparatus 11 Inflow port 20 Dirty liquid storage tank 30 Casing pipe 31 Cylindrical filter 40 Rotating screw 50 Coolant collection tank 60 Chip discharge port 201 Chip processing apparatus 230 Rotating cylindrical filter 231 (Outside surface of rotating cylindrical filter) 232 outer peripheral wall 233 (outer peripheral wall) inner peripheral surface 240 spiral blade 250 coolant recovery port

Claims (2)

In a chip processing apparatus that separates the chips from a dirty liquid in which chips generated during workpiece processing are mixed with the coolant,
A dirty liquid storage tank for storing the dirty liquid;
A casing pipe that is at least partially configured with a cylindrical filter and that is disposed in the vertical direction with a lower end located in the dirty liquid storage tank,
Inserted into the casing pipe, the lower end extends into the dirty liquid storage tank, the upper end extends upward from the upper end of the casing pipe, and the outer peripheral portion is close to the inner peripheral surface of the casing pipe. Rotating screw,
A coolant recovery tank that is provided around the casing pipe and recovers coolant that has been pushed up by the rotary screw and permeated from the inside to the outside of the cylindrical filter;
A chip discharge port for discharging the chips pushed up inside the casing pipe by the rotary screw,
By rotating the rotary screw, the dirty liquid is raised in the casing pipe, the coolant is permeated from the inside to the outside of the cylindrical filter and collected in the coolant collecting tank, and the chips are collected in the casing pipe. A chip processing apparatus, wherein the chip processing apparatus is configured to discharge from the upper end of the chip through the chip discharge port. In a chip processing apparatus that separates the chips from a dirty liquid in which chips generated during workpiece processing are mixed with the coolant,
A dirty liquid storage tank for storing the dirty liquid;
A rotating cylindrical filter having a lower end positioned in the dirty liquid storage tank and disposed in the vertical direction,
An outer peripheral wall surrounding the rotary cylindrical filter with a predetermined gap between the rotary cylindrical filter and an outer peripheral surface;
A spiral blade surrounding the rotating cylindrical filter and formed along the inner peripheral surface of the outer peripheral wall;
A coolant recovery port for recovering coolant that is provided at the inner lower portion of the rotary cylindrical filter and permeates from the outside to the inside of the rotary cylindrical filter;
A chip discharge port for discharging the chip,
By rotating the rotating cylindrical filter, a swirling airflow is generated in the gap, and the swirling airflow pushes up the chips along the spiral blades and discharges them from the upper end portion through the chip discharge port. In addition, the chip processing apparatus is configured to allow the coolant to permeate from the outside to the inside of the rotating cylindrical filter and collect the coolant from the coolant recovery port.

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