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EP-3936279-B1 - CUTTING FLUID TANK, MACHINE TOOL AND MACHINE TOOL SYSTEM

EP3936279B1EP 3936279 B1EP3936279 B1EP 3936279B1EP-3936279-B1

Inventors

  • KANNO, Tsuyoshi

Dates

Publication Date
20260506
Application Date
20200304

Claims (6)

  1. A cutting fluid tank (20) configured to recover cutting fluid from a machine tool (1), comprising: a first parallel passage (263) and a second parallel passage (265) configured to recover the cutting fluid discharged from the machine tool (1) and parallelly arranged to each other; and a communication passage (264) configured to communicate the first parallel passage (263) and the second parallel passage (265) at ends of the first parallel passage (263) and the second parallel passage (265), wherein the cutting fluid tank (20) flows the cutting fluid through the first parallel passage (263) and the second parallel passage (265) in opposite directions to each other, and supplies the cutting fluid from the end of the second parallel passage (265) to the machine tool (1), two inflow and outflow portions (261, 262) are adjacently arranged configured to flow the recovered cutting fluid to the first parallel passage (263), and each of inflow and outflow portions (261, 262) formed so as to flow the cutting fluid from different direction to each other, and flow the cutting fluid to the first parallel passage (263), characterized in that the cutting fluid tank (20) further comprises two receivers (231, 251) configured to receive the cutting fluid, wherein one of the receivers (231) is disposed so as to face the first parallel passage (263) across the second parallel passage (265), and the other of receivers (251) is disposed at the opposite position to the communication passage (264), and the cutting fluid flows from a direction intersecting the first parallel passage (263) when the cutting fluid flows from one of the receivers (231) to one of the inflow and outflow portions (261, 262), and the cutting fluid flows from a direction along the first parallel passage (263) when the cutting fluid flows from the other of the receivers (251) to the other of the inflow and outflow portions (261, 262).
  2. The cutting fluid tank (20) according to claim 1, further comprising: a first conveyor mounter (22) configured to mount a conveyor (101) which separates cutting chips contained in the cutting fluid from the cutting fluid, conveys the cutting chips, and supplies the cutting fluid to the receiver; and a second conveyor mounter (24) configured to mount the conveyor (101) in a direction different from a direction mounted by the first conveyor mounter (22), wherein the cutting fluid is supplied to one of the receivers (231, 251) from the conveyor (101), when the conveyor (101) is mounted on the first conveyor mounter (22), and the cutting fluid is supplied to the other of receivers (231, 251) from the conveyor (101), when the conveyor (101) is mounted on the second conveyor mounter (24).
  3. The cutting fluid tank (20) according to claim 2, wherein a first layer on which the first conveyor mounter (22) and the second conveyor mounter (24) are provided, and a second layer disposed below the first layer and on which the first parallel passage (263), the second parallel passage (265), and the communication passage (264) are provided.
  4. The cutting fluid tank (20) according to claim 2, wherein one of the receivers (231, 251) flows the cutting fluid to one of the inflow and outflow portions (261, 262) through a dam (232, 252) provided on the first layer so as to intersect the second parallel passage (265).
  5. A machine tool (1) comprising: a cutting fluid tank (20) configured to accommodate cutting fluid by recovering the cutting fluid supplied toward the vicinity of the processing position during processing of a workpiece by the tool of the machine tool (1); and a pump (16) configured to pump the cutting fluid to a supplier (15) configured to supply the cutting fluid accommodated in the cutting fluid tank (20) toward the vicinity of the machining position, wherein the cutting fluid tank (20) configured to recover the cutting fluid from a machine tool (1), wherein the cutting fluid tank is according to claim 1.
  6. A machine tool system (100) comprising: a machine tool (1) configured to cut a workpiece by a tool; and a conveyor (101) configured to convey cutting chips generated from the workpiece cut by the tool, wherein the machine tool (1) is according to claim 5.

Description

FIELD The disclosure relates to a cutting fluid tank, a machine tool and a machine tool system. BACKGROUND A cutting fluid tank is conventionally known in which cutting fluid used for cutting a workpiece by a machine tool is accommodated. The JP 2000/135651 discloses a cutting liquid storage tank according to the preamble of claim 1. The inside of a tank is partitioned by a partition wall, and a mixing oil separating room; a mixing oil recovery room neighboring with the mixing oil separating room; a cutting liquid recovery room neighboring with the mixing oil separating room; and a cutting liquid storage room neighboring with the cutting liquid recovery room; are formed. By cutting a part of the partition walls, a mixing oil exhaust port to communicate the mixing oil separating room and the mixing oil recovery room; a recovery part to communicate the mixing oil separating room and the cutting liquid recovery room; and a cutting liquid exhaust port to communicate the cutting liquid recovery room and the cutting liquid storage room 40; are formed. The lubricating oil is recovered to the mixing oil recovery room, and only the cutting liquid can be stored in the cutting liquid storage room. SUMMARY The cutting fluid in the cutting fluid tank is recovered to the cutting fluid tank, after supplied to a processing portion, when a workpiece is processed by the machine tool. Since a temperature of the processing portion of the workpiece is high during cutting processing, the processing portion is cooled by the cutting fluid. On the other hand, since a temperature of the cutting fluid is increased by cooling the processing portion of the workpiece, the cutting fluid at a predetermined temperature is flowed in the cutting fluid tank. Although a temperature of the machine tool affects processing accuracy thereof, and it is desirable that the temperature of the cutting fluid is kept constant, if the cutting fluid is recovered from different recovery positions, the temperature of the cutting fluid is different to each other and the processing accuracy may be adversely affected. Therefore, an object of the present disclosure is to provide a cutting fluid tank for a machine tool capable of recovering the cutting fluid from different recovery positions, with suppressing the temperature difference of the cutting fluid during processing. In order to achieve the above object, a cutting fluid tank according to the embodiment configured to recover cutting fluid from a machine tool includes a first parallel passage and a second parallel passage configured to recover the cutting fluid discharged from the machine tool and parallelly arranged to each other, and a communication passage configured to communicate the first parallel passage and the second parallel passage at ends of the first parallel passage and the second parallel passage, wherein the cutting fluid tank flows the cutting fluid through the first parallel passage and the second parallel passage in opposite directions to each other, and supplies the cutting fluid from the end of the second parallel passage to the machine tool, two inflow and outflow portions are adjacently arranged configured to flow the recovered cutting fluid to the first parallel passage, and each of inflow and outflow portions formed so as to flow the cutting fluid from different direction to each other, and flow the cutting fluid to the first parallel passage. Further, the cutting fluid tank according to the embodiment further includes two receivers configured to receive the cutting fluid, wherein one of the receivers is disposed so as to face the first parallel passage across the second parallel passage, and the other of receivers is disposed at the opposite position to the communication passage, the cutting fluid flows from a direction intersecting the first parallel passage when the cutting fluid flows from one of the receivers to one of the inflow and outflow portions, and the cutting fluid flows from a direction along the first parallel passage when the cutting fluid flows from the other of the receivers to the other of the inflow and outflow portions. Further, it is preferable for the cutting fluid tank according to the embodiment that the cutting fluid tank according to the embodiment further includes a first conveyor mounter configured to mount a conveyor which separates cutting chips contained in the cutting fluid from the cutting fluid, conveys the cutting chips, and supplies the cutting fluid to the receiver, a second conveyor mounter configured to mount the conveyor in a direction different from a direction mounted by the first conveyor mounter, wherein the cutting fluid is supplied to one of the receivers from the conveyor, when the conveyor is mounted on the first conveyor mounter, and the cutting fluid is supplied to the other of receivers from the conveyor, when the conveyor is mounted on the second conveyor mounter. Further, it is preferable for the cutting fluid tank according to t