JP3206424U - Coolant device - Google Patents

Abstract

The present invention provides a coolant device that can sufficiently purify a coolant, reduce the number of times a coolant tank is cleaned, and reduce running costs and manufacturing costs. In a coolant tank 102 having a cylindrical shape, coolant flows in from a tangential direction via an inflow pipe 127. Near the center of the upper surface of the coolant tank, a belt-type scum recovery device is arranged. The scum that floats in the vicinity of the center is separated from the coolant to prevent the coolant from decaying. The coolant pump 107 for processing supplies the coolant in the coolant tank to the inlet 21 of the magnetic inline filter 10 together with the sludge accumulated near the center of the bottom surface 106. Sludge such as chips in the coolant supplied to the inlet is adsorbed to the wall surface of the magnetic inline filter by the magnetic field of the magnetic inline filter, and the coolant is filtered. [Selection] Figure 1

Description

  The present invention relates to a coolant device, and more particularly, to a coolant device provided with a magnetic in-line filter that removes chips in the coolant.

  In machine tools such as a grinding machine and a machining center, coolant is supplied from a coolant tank to workpieces and jigs in a processing section, and workpieces are processed and jigs are cleaned. Chips washed away from the processed workpiece chips and jigs are collected in the coolant tank together with the coolant after large chips are collected by the chip conveyor. The recovered coolant is filtered by a coolant filtering device, and chips mixed in the coolant are separated and recovered from the coolant. The coolant recovered in the coolant tank also contains abrasive grains that have fallen off the grindstone and lubricating oil that has leaked from the sliding surface. Accordingly, there is a need for a coolant device that efficiently collects these foreign substances, prevents deterioration of the coolant, reduces the number of cleanings of the coolant tank, and reduces running costs.

  The conventional coolant device disclosed in Patent Document 1 generates a swirling flow by flowing a coolant in a tangential direction of the inner surface of the peripheral wall of the cylindrical tank 6, and collects chips and abrasive grains at the center of the cylindrical tank 6 by the swirling flow. The sedimented chips and abrasive grains are pumped up by the second circulation pump 7 and filtered by the filtration device 8. As a result, generation of sludge such as chips and abrasive grains accumulated on the bottom 6b of the cylindrical tank 6 is avoided. However, since the conventional coolant device disclosed in Patent Document 1 requires four tanks, that is, a storage tank 2, a sub storage tank 4, a cylindrical tank 6, and a clean tank 9, there are many places where sludge is accumulated and necessary. Since the capacity of the coolant is also large, the number of cleanings of the coolant tank is increased, and the running cost and the manufacturing cost are increased.

  In the conventional coolant device disclosed in Patent Document 2, the auxiliary separation mechanism 13 sucks the coolant from the tangential direction of the cylindrical processing liquid tank 1 and returns the coolant to the tangential direction of the processing liquid tank 1 to generate a swirling flow. Is generated. This swirling flow collects and precipitates sludge at the center of the treatment liquid tank 1, sucks the precipitated sludge from the center bottom of the treatment liquid tank 1, filters the magnetic chips with the magnet separator 3, and removes the sludge from the coolant. It has been removed. However, since the conventional coolant device disclosed in Patent Document 2 does not collect the scum that has floated near the center of the treatment liquid tank 1, the coolant is not sufficiently purified and deterioration of the coolant cannot be prevented. .

  The coolant device of the applicant of the present invention disclosed in Patent Document 3 sucks out coolant from a rectangular tank-shaped coolant tank 102 by a processing coolant pump 107, and filters magnetic chips from the coolant with a magnetic inline filter 10. ing. Further, floating oil is separated from the coolant by an oil skimmer 109. However, in the coolant device disclosed in Patent Document 3, chips and floating oil cannot be collected near the suction port of the processing coolant pump 107 and the belt of the oil skimmer 109, so that the coolant is not sufficiently purified.

JP 2003-19637 A JP 2010-36330 A WO2014 / 098040A1

  An object of the present invention is to provide a coolant device that can sufficiently purify the coolant, reduce the number of cleanings of the coolant tank, and reduce running costs and manufacturing costs.

The said subject is solved by the following means.
That is, the coolant device of the present invention 1 is
A bottomed cylindrical coolant tank in which coolant to be supplied to the machine tool is stored;
A coolant inlet formed in the coolant tank and flowing in a tangential direction of an inner peripheral wall of the coolant tank to generate a vortex in the coolant that has been collected from the machine tool;
A scum recovery device that recovers scum that has floated near the center of the coolant tank;
A magnetic in-line filter for separating the sludge from the coolant sucked out from the vicinity of the center of the bottom surface of the coolant tank and supplying the coolant to the machining part of the machine tool;
The magnetic in-line filter is
A cylindrical body that is a double pipe consisting of an inner pipe and an outer pipe arranged coaxially, and a coolant containing sludge flows in a space that is a gap between the double pipes;
An inner peripheral surface side magnet disposed on the inner peripheral surface of the inner tube;
An outer peripheral surface-side magnet disposed on the outer peripheral surface of the outer tube;
The inner peripheral surface side magnet and the outer peripheral surface side magnet for demagnetizing chips that are fixed and magnetized to the peripheral surfaces of the inner tube and the outer tube in the space and to discharge the chips to the outside of the space. And a relative drive means that is a drive means for moving the lens in the axial direction away from the space.

  The coolant device of the present invention 2 is the same as that of the present invention 1 except that a precipitation tank that separates a non-magnetic material that is a foreign substance from the coolant recovered from the machine tool, and a magnetic drum that rotates from the coolant that passes through the precipitation tank. And a magnet separator that discharges the coolant from which the magnetic material has been separated to the coolant inlet.

  The coolant device of the present invention 3 is the same as the coolant device of the present invention 2, wherein the scum recovery device and the magnetic inline filter are attached to the upper surface of the coolant tank, and the settling tank and the magnet separator are attached in the vicinity of the coolant tank. It is characterized by.

  The coolant device of the present invention 4 is characterized in that, in the present invention 3, the bottom surface of the coolant tank is formed in an inverted conical shape that becomes deeper from the inner periphery toward the center.

  The coolant device of the present invention causes the coolant to flow in the tangential direction of the inner peripheral wall of the bottomed cylindrical coolant tank to generate a vortex in the coolant, and collects the scum floating near the center of the coolant tank with the scum recovery device, The sludge is separated from the coolant sucked out from the vicinity of the center of the bottom surface of the coolant tank by a magnetic in-line filter, and the coolant is supplied to the machining portion of the machine tool. Therefore, the coolant can be sufficiently purified, the number of times of cleaning the coolant tank is reduced, and the running cost and the manufacturing cost can be reduced.

FIG. 1 is an overall front view showing an example of a coolant device according to an embodiment of the present invention and attached to a grinding machine. FIG. 2 is a plan view of FIG. FIG. 3 is a right side view of FIG. FIG. 4 is a piping diagram of FIG. 5A and 5B show a magnetic inline filter according to an embodiment of the present invention. FIG. 5A is a front view, and FIG. 5B is a plan view of FIG. FIG. 6 is a longitudinal sectional view of FIG. FIG. 7 is a cross-sectional view taken along the line AA of FIG. 8 is a cross-sectional view taken along the line BB in FIG. FIG. 9 is a longitudinal section showing a state where the inner peripheral surface side magnet and the outer peripheral surface side magnet are lowered to the cleaning position.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall front view showing an example of a coolant device according to an embodiment of the present invention and attached to a grinding machine. 2 is a plan view of FIG. 1, FIG. 3 is a right side view of FIG. 1, and FIG. 4 is a piping diagram of FIG. As shown in FIGS. 1 to 4, the magnetic inline filter 10 is fixed to the upper surface of a coolant tank 102 that supplies coolant to the grinding machine 101 with bolts (not shown). A support base 126 having a rectangular shape in plan view is fixed to the right side surface of the coolant tank 102, and a rectangular box-shaped precipitation tank 103 and a magnet separator 105 are placed on the upper surface of the support base 126. Chips washed away from workpiece chips and jigs processed by the grinding machine 101 are collected by a chip conveyor (not shown) and then collected together with the coolant through the coolant collection pipe 104 into the sedimentation tank 103.

  The coolant collected in the settling tank 103 flows into the magnetic separator 105 via the connection pipe 128 after the non-magnetic material such as abrasive grains dropped from the grindstone is precipitated in the settling tank 103 and separated. The magnet separator 105 separates chips from the coolant with a rotating magnetic drum, and the coolant from which the chips are separated flows into the coolant tank 102 via the coolant inflow pipe (coolant inlet) 127. The coolant tank 102 is made of stainless steel having a bottomed cylindrical shape, and the coolant inflow pipe 127 is connected to the tangential direction of the inner peripheral wall 129 of the coolant tank 102. Accordingly, the coolant flowing into the coolant tank 102 generates a vortex along the inner peripheral wall 129 of the coolant tank 102. The bottom surface 106 of the coolant tank 102 is formed in an inverted conical shape that becomes deeper from the inner peripheral wall 129 toward the center.

  Accordingly, chips, abrasive grains, lubricating oil, and the like that have not been removed by the sedimentation tank 103 and the magnetic separator 105 gather at the center of the coolant tank 102. Lubricating oil, fine chips, fine abrasive grains, etc. float near the center of the coolant tank 102 to form a scum. Further, relatively large chips and relatively large abrasive particles accumulate and settle near the center of the bottom surface 106 of the coolant tank 102 along the inverted conical bottom surface 106 of the coolant tank 102, and sludge (sedimented sludge). Form. In addition, the sludge which settles in the sedimentation tank 103 is cleaned for every fixed period.

  A belt-type scum recovery device 109 is placed in the vicinity of the center of the upper surface of the coolant tank 102. The scum that floats in the vicinity of the center of the coolant tank 102 is recovered by the belt and separated from the coolant to prevent the coolant from decaying. To do. A float type liquid level gauge 110 is placed on the upper surface of the coolant tank 102 in the vicinity of the center of the coolant tank 102. The float type liquid level gauge 110 detects an upper limit and a lower limit of the coolant level in the coolant tank 102 and displays an alarm on a screen of an operation panel (not shown) of the grinding machine 101.

  On the upper surface of the coolant tank 102, a coolant pump 107 for machining and a coolant pump 108 for flowing chips are placed in the vicinity of the center of the coolant tank 102. The coolant pump 107 for processing supplies the coolant in the coolant tank 102 to the inlet 21 of the magnetic inline filter 10 together with the sludge accumulated near the center of the bottom surface 106. A pressure gauge 112 and a manual switching valve 113 are attached in the middle of the piping 111 connecting the coolant pump 107 for processing and the inlet 21. Sludge such as chips in the coolant supplied to the introduction port 21 is adsorbed on the wall surface of the magnetic inline filter 10 by the magnetic field of the magnetic inline filter 10, and the coolant is filtered.

  In the example shown in FIG. 1, the coolant suction ports of the coolant pump 107 for machining and the coolant pump 108 for chip flow are installed at the same height in the coolant tank 107, but sludge is observed in the coolant tank 107. Then, the height may be changed to suck the sludge so that it does not accumulate. The filtered coolant is supplied from the supply port 22 of the magnetic in-line filter 10 via the coolant supply pipe 114 to the processing portion (contact position between the grindstone and the workpiece) of the grinding machine 101 and processed with a clean coolant. A flow switch 115 for detecting the flow rate of the coolant flowing through the coolant supply pipe 114 is attached in the middle of the coolant supply pipe 114 to detect the lower limit of the flow rate, and an alarm is displayed on the screen of the operation panel (not shown) of the grinding machine 101. Is displayed.

  In the sedimentation tank 103, a rectangular box-shaped mesh cage 116 having a mesh with a predetermined filtration accuracy is placed. A coolant discharge pipe 117 that discharges the coolant discharged from the discharge port 23 to the mesh basket 116 is connected to the discharge port 23 of the magnetic inline filter 10. When the processing of the grinding machine 101 is completed, the piston rod of the fluid cylinder 61 is extended to the lowest end, the solenoid of the switching valve 231 of the discharge port 23 is operated, and the coolant discharged from the discharge port 23 is discharged to the mesh basket 116. The mesh basket 116 separates and accumulates sludge such as chips from the coolant, and flows the coolant from which sludge such as chips is separated to the settling tank 103. Sludge such as chips accumulated in the mesh basket 116 is periodically cleaned by removing the mesh basket 116 from the settling tank 103.

  The chip flow coolant pump 108 supplies the coolant in the coolant tank 102 to the grinding machine 101 without passing through the magnetic inline filter 10. A pressure gauge 119 and a manual switching valve 120 are attached in the middle of a pipe 118 connecting the coolant pump 108 for chip flow and the grinding machine 101. The coolant supplied to the grinding machine 101 from the chip casting coolant pump 108 is supplied to a jig or bed of the grinding machine 101, and the chips are washed out from the jig or bed and discharged to the chip conveyor. The coolant device according to the embodiment of the present invention effectively filters both the floating scum and the settled sludge with one coolant tank 102, so that the coolant can be sufficiently purified and the number of times of cleaning the coolant tank is reduced. In addition, the running cost and the manufacturing cost can be reduced.

  Next, the above-described magnetic inline filter 10 will be described in detail. FIG. 5 shows the magnetic inline filter 10, FIG. 5 (a) is a front view, and FIG. 5 (b) is a plan view of FIG. 5 (a). 6 is a longitudinal sectional view of FIG. 5A, and FIG. 7 is an AA sectional view of FIG. 8 is a cross-sectional view taken along the line BB of FIG. 7, and FIG. 9 is a longitudinal cross-sectional view showing a state where the inner peripheral surface side magnet and the outer peripheral surface side magnet are lowered to the cleaning position. As shown in FIGS. 5 to 9, a magnetic in-line filter 10 according to an embodiment of the present invention is a cylindrical body composed of an inner tube 1 and an outer tube 2 made of a nonmagnetic material such as austenitic stainless steel. 3. The cylindrical body 3 includes an inner peripheral surface side magnet 4 disposed on the inner peripheral surface of the inner tube 1, an outer peripheral surface side magnet 5 disposed on the outer peripheral surface of the outer tube 2, the inner peripheral surface side magnet 4, and the outer periphery. It is comprised by the relative drive means 6 which moves the surface side magnet 5 to an axial direction.

  The cylindrical body 3 is a double tube in which a cylindrical inner tube 1 and a cylindrical outer tube 2 are arranged coaxially. The axial length of the inner tube 1 is formed approximately twice the axial length of the outer tube 2, and the lower end of the inner tube 1 is fixed to a rectangular lower plate 71 by welding and is erected vertically. The outer tube 2 is disposed on the upper portion of the inner tube 1, and the coolant flows through a space 31 that is a gap between the inner tube 1 and the outer tube 2. An upper lid 32 is welded to the upper end of the space 31, and a bottom lid 33 is welded to the lower end of the space 31 to integrate the inner tube 1 and the outer tube 2 and to seal the space 31.

  In the vicinity of the lower end of the axial length of the outer tube 2, an introduction port 21 for introducing coolant into the space 31 is formed. Further, in the vicinity of the upper end of the axial length of the outer tube 2, a supply port 22 for supplying the coolant purified in the space 31 to the processing part is formed. Further, the outer tube 2 is formed with a discharge port 23 below the introduction port 21, and the discharge port 23 discharges the chips accumulated in the space 31 to the outside of the space 31. A switching valve 231 operated by a solenoid is attached to the discharge port 23, and the discharge port 23 communicates with the mesh basket 116 when chips are discharged. When the coolant is filtered, the switching valve 231 blocks the discharge port 23. The bottom lid 33 is formed on an inclined surface that descends from the introduction port 21 toward the discharge port 23, so that sludge such as chips is easily discharged from the discharge port 23 to the outside.

  An inner peripheral surface side magnet 4 is disposed on the inner peripheral surface 11 of the inner tube 1 with a slight gap from the inner peripheral surface 11. The inner peripheral surface side magnet 4 is composed of a columnar magnet holder 41 and a plurality of magnets 42 fixed to the concave grooves 44 on the outer peripheral surface of the magnet holder 41 with an adhesive. The magnet holder 41 is formed with an axial length substantially the same as the axial length of the outer tube 2 and is formed of a magnetic metal such as structural steel. A plurality of magnets 42 are formed in a sector shape, and a plurality (12) of magnets 42 are arranged at equal angular intervals (30 degrees) over the entire circumference of the inner peripheral surface 11 of the inner tube 1. It is arranged over an axial length substantially the same as the axial length of 2.

  The inner peripheral surface side magnet 4 can move in the axial direction of the inner tube 1 and is driven between a filtration position facing the space 31 and a cleaning position away from the space 31. That is, between the rectangular lower plate 71 and the rectangular upper plate 72, three columnar guide rods 73 made of structural steel are fixed vertically. The upper plate 72 is arranged with a slight gap above the cylindrical body 3. The guide rod 73 extends vertically through the magnet holder 41 and is slidably assembled to cylindrical linear bushes 74 and 74. The linear bushes 74 and 74 are fixed to the upper and lower ends of the magnet holder 41 by pressing plates 43 and 43. The holding plates 43, 43 are disk-shaped and are fixed to the upper end surface and the lower end surface of the magnet holder 41. A plurality of balls (not shown) are interposed between the guide rod 73 and the linear bushings 74 and 74 so as to be capable of rolling motion, thereby enabling light linear motion.

  A fluid cylinder 61 as fluid driving means is fixed to the upper surface of the upper plate 72, and a piston rod 62 protruding from the lower end of the fluid cylinder 61 is screwed and fixed to the upper end surface of the magnet holder 41. Therefore, by switching the hydraulic pressure supplied to the fluid cylinder 61, the inner peripheral surface side magnet 4 is driven between a filtration position facing the space 31 and a cleaning position away from the space 31.

  The outer peripheral surface side magnet 5 is disposed on the outer peripheral surface 24 of the outer tube 2 with a slight gap from the outer peripheral surface 24. The outer peripheral surface side magnet 5 includes a plurality of semicircular arc columnar magnet holders 51, 51 protruding outward, and a plurality of grooves 54 fixed to the inner peripheral surface of the magnet holders 51, 51 with an adhesive. It is composed of a magnet 52. The magnet holders 51 and 51 are formed to have substantially the same axial length as the axial length of the outer tube 2 and are formed of a magnetic metal such as structural steel. A plurality of (10) magnets 52 are formed in a sector shape and arranged at equal angular intervals (30 degrees) over the entire circumference of the outer peripheral surface 24 of the outer tube 2, and ten magnets are laminated in the axial direction to form the outer tube 2. It is arranged over an axial length substantially the same as the axial length.

  The outer peripheral surface side magnet 5 can move in the axial direction of the outer tube 2, and is driven between a filtration position facing the space 31 and a cleaning position away from the space 31. That is, four cylindrical guide rods 75 are fixed vertically between the rectangular lower plate 71 and the rectangular upper plate 72. Two guide rods 75 pass through the magnet holders 51 and 51 and extend vertically, and are slidably assembled to cylindrical linear bushes 76 and 76. The linear bushes 76, 76 are fixed to the upper and lower ends of the magnet holders 51, 51 by pressing plates 53, 53. The holding plates 53 and 53 are semicircular arc plates and are fixed to the upper end surface and the lower end surface of the magnet holders 51 and 51. A plurality of balls (not shown) are interposed between the guide rod 75 and the linear bushes 76 and 76 so as to be capable of rolling motion, thereby enabling light linear motion.

  The outer peripheral surface side magnet 5 is driven in synchronization with the inner peripheral surface side magnet 4. The pressing plate 53 at the lower end of the outer peripheral surface side magnet 5 and the pressing plate 43 at the lower end of the inner peripheral surface side magnet 4 are connected by a rectangular connecting plate 77. Therefore, by switching the hydraulic pressure supplied to the fluid cylinder 61, the inner peripheral surface side magnet 4 and the outer peripheral surface side magnet 5 are synchronized between the filtration position facing the space 31 and the cleaning position away from the space 31. Driven. That is, the relative drive means 6 of the present invention includes a guide rod 73, a guide rod 75, linear bushes 74, 74, linear bushes 76, 76, and a fluid cylinder 61.

[Operation of magnetic inline filter 10]
The magnet 42 of the inner peripheral surface side magnet 4 is fixed to a magnet holder 41 that is a magnetic body. For this reason, the magnetic field lines start from the N pole and exit into the air before terminating at the S pole. At this time, since the innermost tube 1 made of a non-magnetic material is closest to the magnet 42, the magnetic field lines are not bent. When sludge such as chips flows into this magnetic field, it is supplemented on the outer peripheral surface 12 of the inner tube 1. Similarly, the magnet 52 of the outer peripheral surface side magnet 5 is fixed to a magnet holder 51 which is a magnetic body. For this reason, the magnetic field lines start from the N pole and exit into the air before terminating at the S pole. At this time, since the outermost tube 2 made of a non-magnetic material is closest to the magnet 52, the magnetic field lines are not bent. When sludge such as chips flows in this magnetic field, it is supplemented on the inner peripheral surface 25 of the outer tube 2.

  On the other hand, the inner peripheral surface side magnet 4 and the outer peripheral surface side magnet 5 are arranged to face each other with different polarities. The magnet 42 of the inner peripheral surface side magnet 4 is set to the S pole on the outer peripheral surface side and the N pole on the inner peripheral surface side. The magnet 52 of the outer peripheral surface side magnet 5 is set to have an N pole on the inner peripheral surface side and an S pole on the outer peripheral surface side. Usually, it is known that the attractive force works when the N pole of another magnet is brought close to the S pole of the magnet. That is, the magnetic field lines exit from the N pole with a positive magnetic amount and enter the S pole with a negative magnetic amount. Accordingly, a line of magnetic force is formed between the magnet 52 of the outer peripheral surface side magnet 5 and the magnet 42 of the inner peripheral surface side magnet 4 from the N pole having a positive magnetic amount to the S pole having a negative magnetic amount. Thus, since the magnetic field in the radial direction becomes stronger, chips in the coolant are adsorbed on the wall surfaces (the outer peripheral surface 12 of the inner tube 1 and the inner peripheral surface 25 of the outer tube 2) on both sides of the space 31, and this adsorbed. Sludge such as chips accumulates and bridges. As a result, precise filtration is possible by allowing the coolant to pass through a gap between sludges such as bridged chips. Further, since the magnetic field in the radial direction is strong and chips are efficiently adsorbed, no special filter member is required.

  The piston rod 62 of the fluid cylinder 61 is retracted to the uppermost position so that the inner peripheral surface side magnet 4 and the outer peripheral surface side magnet 5 are in the filtration position facing the space 31. In this state, the solenoid of the switching valve 231 is operated to shut off the discharge port 23. The coolant is introduced into the space 31 from the inlet 21 near the lower end of the outer tube 2, and the coolant is supplied to the processing portion from the supply port 22 near the upper end. Since the magnetic field in the radial direction is strong, sludge such as chips in the coolant is adsorbed on the wall surfaces on both sides of the space 31, and the coolant is filtered. If the supply of coolant is continued, sludge such as chips adsorbed on the wall surface accumulates and bridges. As a result, the coolant passes through the gap between sludges such as bridged chips, so that precise filtration is possible.

  When the machining of the workpiece is completed, as shown in FIG. 9, the piston rod 62 of the fluid cylinder 61 is extended to the lowest end, and the inner peripheral surface side magnet 4 and the outer peripheral surface side magnet 5 are moved away from the space 31. To do. Accordingly, the magnetic force acting on the space 31 is lost, and sludge such as chips adsorbed on the wall surfaces on both sides of the space 31 is easily separated from the wall surface of the space 31. The solenoid of the switching valve 231 is operated, and the discharge port 23 is connected to the mesh basket 116. The coolant is introduced into the space 31 from the inlet 21 near the lower end of the outer pipe 2, and the coolant is discharged from the outlet 23 below the inlet 21. Since the bottom cover 33 is formed on an inclined surface that descends from the introduction port 21 toward the discharge port 23, sludge such as chips accumulated in the space 31 is easily discharged from the discharge port 23 to the outside. The magnetic in-line filter 10 according to the embodiment of the present invention is preferable because it does not stir the coolant during the filtration process, and can suppress an increase in the coolant temperature. Moreover, since the coolant apparatus provided with the magnetic inline filter 10 according to the embodiment of the present invention has no consumables such as a paper filter, the running cost is reduced.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment. For example, it is preferable to open a part of the upper surface of the coolant tank 102 because an increase in the temperature of the coolant can be suppressed. In the embodiment of the present invention, the example applied to the coolant device of the grinding machine has been described. However, the present invention may be applied to other machine tools such as a lathe and a machining center.

DESCRIPTION OF SYMBOLS 10 ... Magnetic inline filter 1 ... Inner tube 11 ... Inner peripheral surface 12 ... Outer peripheral surface 2 ... Outer tube 21 ... Inlet port 22 ... Supply port 23 ... Discharge port 231 ... Switching valve 24 ... Outer peripheral surface 25 ... Inner peripheral surface 3 ... Tube Shape 31 ... space (gap)
32 ... Upper lid 33 ... Bottom lid 4 ... Inner circumferential surface side magnet 41 ... Magnet holder 42 ... Magnet 43 ... Holding plate 44 ... Concave groove 5 ... Outer circumferential surface side magnet 51 ... Magnet holding member 52 ... Magnet 53 ... Holding plate 54 ... Groove 6 ... Relative driving means 61 ... Fluid cylinder 62 ... Piston rod 71 ... Lower plate 72 ... Upper plate 73 ... Guide rod 74 ... Linear bush 75 ... Guide rod 76 ... Linear bush 77 ... Connecting plate 101 ... Grinding machine 102 ... Coolant Tank 103 ... Precipitation tank 104 ... Coolant recovery pipe 105 ... Magnet separator 106 ... Bottom face 107 ... Processing coolant pump 108 ... Chip coolant coolant pump 109 ... Scum recovery device 110 ... Float type liquid level gauge 111 ... Piping 112 ... Pressure gauge 113 ... Manual switching valve 114 ... Coolant supply pipe 115 ... Flow switch 116 ... Mesh basket 117 ... Coolant Extraction pipe 118 ... pipe 119 ... pressure gauge 120 ... manually switching valves 126 ... supporting table 127 ... coolant inlet pipe (coolant inlet)
128 ... Connection pipe 129 ... Inner wall

Claims (4)

A bottomed cylindrical coolant tank in which coolant to be supplied to the machine tool is stored;
A coolant inlet formed in the coolant tank and flowing in a tangential direction of an inner peripheral wall of the coolant tank to generate a vortex in the coolant that has been collected from the machine tool;
A scum recovery device that recovers scum that has floated near the center of the coolant tank;
A magnetic in-line filter for separating the sludge from the coolant sucked out from the vicinity of the center of the bottom surface of the coolant tank and supplying the coolant to the machining part of the machine tool;
The magnetic in-line filter is
A cylindrical body that is a double pipe consisting of an inner pipe and an outer pipe arranged coaxially, and a coolant containing sludge flows in a space that is a gap between the double pipes;
An inner peripheral surface side magnet disposed on the inner peripheral surface of the inner tube;
An outer peripheral surface-side magnet disposed on the outer peripheral surface of the outer tube;
The inner peripheral surface side magnet and the outer peripheral surface side magnet for demagnetizing chips that are fixed and magnetized to the peripheral surfaces of the inner tube and the outer tube in the space and to discharge the chips to the outside of the space. And a relative drive means that is a drive means for moving the actuator in the axial direction away from the space. The coolant device according to claim 1,
A settling tank for separating a non-magnetic material that is a foreign substance from the coolant recovered from the machine tool;
A coolant apparatus comprising: a magnetic separator that separates a magnetic material from a coolant that passes through the settling tank by a rotating magnetic drum, and that discharges the coolant from which the magnetic material has been separated to the coolant inlet. The coolant device according to claim 2,
The scum recovery device and the magnetic inline filter are attached to the upper surface of the coolant tank,
The said sedimentation tank and the said magnetic separator are attached to the vicinity of the said coolant tank. The coolant apparatus characterized by the above-mentioned. The coolant device according to claim 3,
The coolant device is characterized in that the bottom surface of the coolant tank is formed in an inverted conical shape that becomes deeper from the inner periphery toward the center.

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