JP2005271088A - Coolant supply device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely clear away chips deposited in the peripheries of a head and a nozzle, to dispense with power for delivering a coolant, and to eliminate the possibility that the coolant enters the device and lubricating oil. <P>SOLUTION: In washing away chips deposited on a bed 30 in the interior of a machine tool 3, this coolant supply device and method include: a reservoir tank 4 disposed in a higher position than the bed 30 to once store the coolant; a bed washing pump 21 for supplying the coolant in the coolant tank 2 to the reservoir tank 4; a control device 6 for controlling to deliver the coolant once stored in the reservoir tank 4 at a stroke in a fixed timing; and a switching control valve 5 for controlling switching to supply the coolant stored in the reservoir tank 4 to the bed 30 at the end of machining. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coolant supply apparatus and method for cleaning chips and the like accumulated on a bed or the like inside a machine tool using a coolant.

  As shown in FIG. 6, the conventional coolant supply apparatus and method uses a cleaning pump SP and a separate circuit C in parallel with the processing pump P and the circuit K as shown in FIG. By discharging onto the bed, the chips on the bed inside the machine tool are cleaned to prevent chips from accumulating on the bed.

  The above-described conventional coolant supply device and method are intended to constantly discharge coolant for cleaning when the chips accumulated on the bed or the like inside the machine tool are to be cleaned. Therefore, a large amount of coolant liquid is required, and a large amount of coolant is required. There has been a problem that a large-capacity pump for discharging the coolant is required.

  In addition, since a large amount of coolant liquid is always flowed into the machine tool, there is a problem that the possibility of coolant intrusion into the main shaft and lubricating oil increases, leading to a decrease in reliability of the main shaft and the like.

  Further, since the nozzle for flowing the coolant into the machine tool is thin, there is a problem that chips are accumulated in a portion where the coolant is always flowed and the flow of the discharged coolant around the nozzle is not formed.

  Therefore, the present invention provides a coolant supply apparatus and method for cleaning chips accumulated on a bed or the like inside a machine tool using a coolant, without using a large-capacity pump, and without constantly flowing coolant. A coolant supply device that reliably cleans the coolant accumulated around the nozzle, further reduces the size of the equipment, saves coolant, and reduces the possibility of coolant intrusion into the equipment and lubricant. It is to provide a method.

The coolant supply device of the present invention (first invention according to claim 1) is:
In the coolant supply device that uses the coolant to clean the chips accumulated on the bed inside the machine tool,
A reserve tank disposed at a position higher than the bed, in which the coolant is temporarily stored;
And a control device that controls the coolant once stored in the reserve tank to be discharged at a constant timing.

The coolant supply device of the present invention (the second invention according to claim 2) is:
In the first invention,
A bed cleaning pump is provided for supplying the coolant in the coolant tank to the reserve tank.

The coolant supply device of the present invention (the third invention according to claim 3) is:
In the second invention,
The liquid level sensor which detects that the liquid level of the coolant supplied and stored in the reserve tank by the bed cleaning pump has reached a certain level is provided.

The coolant supply device of the present invention (the fourth invention according to claim 4) is:
In the first to third inventions,
Based on a control signal from the control device, there is provided a switching control valve that performs switching control in order to supply the coolant stored in the reserve tank to the bed at the end of machining.

The coolant supply device of the present invention (the fifth invention according to claim 5) is:
In the first to fourth inventions,
A chip removing separator is provided for removing chips contained in the coolant supplied to remove chips on the bed, and only the coolant is supplied to the coolant tank.

The coolant supply device of the present invention (the sixth invention according to claim 6) is:
In the first invention,
A control device for controlling the coolant once stored in the reserve tank to be discharged at a stroke to the beds inside the plurality of machine tools is provided.

The coolant supply method of the present invention (the seventh invention according to claim 7),
In a coolant supply method for cleaning chips accumulated on a bed or the like inside a machine tool using a coolant,
The coolant is once stored in a reserve tank disposed at a position higher than the bed,
Control is performed so that the coolant once stored in the reserve tank is discharged at a certain timing.

  The coolant supply apparatus according to the first invention having the above-described configuration is the coolant supply apparatus for cleaning chips accumulated on a bed or the like inside a machine tool using a coolant, wherein the reserve tank disposed at a position higher than the bed. The coolant is once stored in the reservoir tank, and the coolant once stored in the reserve tank under the control of the control device is discharged at a certain timing. There is an effect that the scraps can be reliably cleaned, the power for discharging the coolant is not required, and the possibility of the coolant entering the main shaft or the lubricating oil can be suppressed.

  In the coolant supply device of the second invention configured as described above, in the first invention, the bed cleaning pump supplies the coolant in the coolant tank to the reserve tank. Therefore, the coolant supply device is easily arranged at a position higher than the bed. There is an effect that coolant can be supplied to the reserve tank provided.

  In the coolant supply device of the third invention having the above-described configuration, in the second invention, the liquid level of the coolant supplied and stored in the reserve tank by the bed cleaning pump is constant. Therefore, if the driving of the bed cleaning pump is stopped by the detection, the power consumption for driving the bed cleaning pump is minimized.

  In the coolant supply device of the fourth invention having the above-described configuration, the processing of the coolant stored in the reserve tank is completed by switching control of the switching control valve based on a control signal from the control device in the third invention. Since it is sometimes supplied to the bed, there is an effect that it is possible to clean the chips at an optimal timing.

  According to a fifth aspect of the present invention, there is provided the coolant supply device according to the fourth aspect, wherein the chip removal separator removes chips contained in the coolant supplied to remove chips on the bed. Since only the coolant is supplied to the coolant tank, there is an effect that the coolant from which chips are removed is stored in the reserve tank.

  According to a sixth aspect of the present invention, there is provided the coolant supply apparatus according to the first aspect, wherein the control device discharges the coolant once stored in the reserve tank to the beds inside the plurality of machine tools at once. Therefore, there is an effect that the chips accumulated around the plurality of machine tool beds and the nozzles are surely and collectively cleaned.

  A coolant supply method according to a seventh aspect of the present invention having the above-described structure is a coolant supply method for cleaning chips accumulated on a bed or the like inside a machine tool using a coolant, in a reserve tank disposed at a position higher than the bed. The coolant is once stored, and the coolant once stored in the reserve tank is controlled so as to be discharged at a certain timing, so that chips accumulated around the conventional bed and nozzle can be surely collected. In addition, there is an effect that the power for discharging the coolant is not required, and the risk of the coolant entering the apparatus and the lubricating oil can be suppressed.

  The best mode for carrying out the present invention will be specifically described below with reference to the accompanying drawings.

  The coolant supply apparatus and method according to the first embodiment are arranged at a position higher than the bed 30 in a coolant supply apparatus for cleaning chips and the like accumulated on the bed 30 and the like inside the machine tool 3 using a coolant. The reserve tank 4 in which the coolant is once stored, the bed cleaning pump 21 for supplying the coolant in the coolant tank 2 to the reserve tank 4, and the coolant once stored in the reserve tank 4 And a switching control for supplying the coolant stored in the reserve tank 4 to the bed 30 at the end of processing based on a control signal from the control device 6 to discharge at a stroke at a time. The switching control valve 5 is provided.

  The coolant supply apparatus 1 according to the first embodiment is an application of the present invention to a grinding machine as a machine tool 3, and uses a grindstone 32 as a tool for processing a workpiece 33 as shown in FIG. In addition, a grindstone base 31 is disposed on the upper surface of the bed 30 inside the machine tool 3, and the grindstone 32 is disposed so as to be rotatable with respect to the grindstone base 31. The grindstone table 31 faces the bed upper surface in the horizontal direction in the figure so that the outer surface of the grindstone 32 can be in contact with the outer surface of the work piece 33 disposed and fixed opposite to the grindstone 32 for processing. It is arranged so as to be slidable.

  In the first embodiment, a coolant tank 2 for storing a coolant 20 for cooling the processing portion and cleaning the chips accumulated on the bed is provided. A pipe 25 for connecting the coolant tank 2 and a nozzle 26 for supplying coolant to the processing portion is provided with a processing pump 24, and the coolant 20 stored in the coolant tank 2 is processed by the nozzle 26. It is comprised so that it may supply to an inside process part.

  A bed cleaning pump 21 is disposed in a pipe line 22 connecting the coolant tank 2 and the reserve tank 4 to suck up the coolant 20 in the coolant tank 2 and supply and store it in the reserve tank 4. is there.

  The reserve tank 4 has a liquid level sensor 42 as a liquid level sensor for detecting that the level of coolant supplied and stored in the reserve tank 4 by the bed cleaning pump 21 has reached a certain level. And a pipe 43 for supplying the overflowed coolant to the upper concave surface 34 of the bed 30 is provided.

  A two-position switching valve 50 having two positions of communication or blocking is provided in the pipe line 41 communicating with the nozzle 52 above the upper concave surface 34 of the bed 30 where one end is open on the bottom surface of the reserve tank and the other end is accumulated with chips and the like. A cleaning valve 5 is provided which is controlled by a control device 6 composed of an electromagnetic switching valve for switching the position of.

  By controlling the opening / closing operation of the two-position switching valve 50 of the cleaning valve 5 by a control signal from the control device 6, the coolant 40 stored in the reserve tank 4 during processing is passed through the nozzle 52. Thus, it is configured to be discharged at once to the upper concave surface 34 of the bed 30 on which chips and the like are accumulated.

  The coolant that has been discharged from the nozzle 52 and has cleaned the upper surface back portion 34 of the bed 30 is conveyed to the chip removal separator 7 via a conduit 35 provided in the bed upper surface recess 34.

  Chips contained in the coolant supplied to remove chips from the bed upper surface recess 34 are removed by the chip removal separator 7, and only the coolant is supplied to the coolant tank 2. .

  That is, a bed cleaning pump 21 is provided in a pipe line 22 connecting the coolant tank 2 and the reserve tank 4, and the coolant tank 2, the bed cleaning pump 21, the reserve tank 4, the bed cleaning valve 5, the bed 30 and the cut A circulation path composed of the waste removal separator 7 is configured.

  The coolant recovered in the chip removal separator 7 is freed of impurities such as chips by a filter 70 provided in the chip removal separator 7 and is provided on the bottom surface of the chip removal separator in a clean state. It is recovered in the coolant tank 2 through the pipeline 71.

  Next, a specific control procedure of the first embodiment apparatus will be described with reference to the flowchart shown in FIG.

  When the control is started, in step 101, the bed cleaning pump 21 is turned on. As a result, the bed cleaning pump 21 sucks up the coolant 20 stored in the coolant tank 2 through one end of the conduit 22 having one end inserted into the coolant tank 2, and the other of the conduit 22. Supply is started and stored in the reserve tank 4 from the nozzle 23 disposed at the end.

  In step 101, after the bed cleaning pump is turned on, in step 102, it is determined whether the workpiece 33 to be machined is correctly fixed.

  If it is determined in step 102 that the workpiece 33 is correctly fixed, in step 103, the processing pump 24 is turned on.

  In step 103, when the processing pump 24 is turned on, the coolant 20 stored in the coolant tank 2 is discharged by a pipe 25 having one end arranged in the coolant tank 2. The coolant 20 is sucked up, and the coolant 20 is discharged to the workpiece processing section through the nozzle 26 disposed at the other end of the pipe 25.

  In step 103, when the processing pump is turned on, a processing cycle is started in step 104. The grindstone base 31 slidably fixed on the upper surface of the bed 30 of the machine tool 3 is slid, and moved to a position where the outer surface of the wheel 32 is in contact with the outer surface of the workpiece 33. At this time, since the coolant 20 is discharged from the nozzle 26 to the workpiece machining portion, the workpiece 33 and the machine tool (the wheel 32) can be cooled and cleaned.

  In step 104, a machining cycle is started and machining is performed. In step 105, when it is confirmed that the machining cycle is finished, in step 106, the machining pump 24 is turned off.

  The coolant 20 discharged and supplied to the machining unit until this time is cooled and cleaned in the machining unit, and is contained on the upper concave surface 34 of the bed 30 disposed in the lower part of the machining unit in a state including chips and the like. Fall.

  In step 106, when the processing pump 24 is turned off, in step 107, the liquid level of the reserve tank 4 for temporarily storing the coolant is confirmed, and sufficient coolant 40 is stored in the reserve tank 4. Determine whether it has been.

  If it is determined in step 107 that sufficient coolant 40 has been stored in the reserve tank 4, then in step 108, the reserve tank 4 is disposed in a pipe line 41 having one end disposed on the bottom surface. Further, the switching valve 50 as the opening / closing valve of the bed washing valve 5 is opened for 5 seconds.

  The flow rate at this time is 2 L / second, and the coolant 40 that has flowed out passes through the pipe 51 and is discharged from the nozzle 52 provided at one end of the pipe 51 to the concave upper surface 34 of the bed.

  Compared with the conventional coolant supply device (FIG. 3 (a)), as shown in FIG. 3 (a), when the processing time at one time is 2 minutes, the conventional coolant supply device has a coolant flow rate of 10L / minute. As shown in Fig. 3 (b), the coolant is supplied at a flow rate of 2L per second while the coolant supply device of the first embodiment requires about 20L of coolant. Since it was supplied for only 5 seconds, only about 10L of coolant is required in one process, leading to savings of coolant and supplying a large amount of coolant in a short time at a time, so that it accumulates around the bed 30 and nozzles 44 and 52. The effect of making it possible to clean the coolant that has been removed and to reduce the size of the equipment, and at the same time, reduce the possibility of coolant entering the spindle and lubricating oil. Unlikely to.

  In step 108, the opening / closing valve 50 of the bed cleaning valve 5 is opened and the coolant 40 is allowed to flow for 5 seconds. Then, in step 109, it is determined whether or not to continue processing.

  If it is determined in step 109 that machining is to be continued, control is performed so that the steps from step 102 are repeated again.

  If it is determined in step 102 that the workpiece 33 is not properly fixed, whether or not the workpiece 33 is correctly fixed in step 102 again after a warning lamp is turned on in step 110. Is determined.

  If it is determined in step 107 that sufficient coolant 40 is not stored in the reserve tank 4, a warning lamp is turned on in step 111, and then again in step 107, the reserve tank 4 is stored in the reserve tank 4. It is determined whether or not the necessary and sufficient coolant 40 is stored.

  The coolant that is discharged from the nozzle 26 provided at one end of the pipe line 25 and cools and cleans the workpiece processing part and falls into the upper surface recess 34 of the bed 30 and the one provided at one end of the pipe line 51. The coolant discharged from the nozzle 52 and cleaning the chips remaining on the bed upper surface back portion 34 is carried to the chip removal separator 7 through a pipe line 35 provided in the bed upper surface recess.

  The coolant recovered in the chip removal separator 7 is provided on the bottom surface of the chip removal separator 7 in a clean state in which impurities such as chips are removed by a filter 70 provided in the chip removal separator 7. It is collected in the coolant tank 2 through the pipe 71 formed.

  The coolant supply apparatus and method according to the first embodiment having the above-described operation is a coolant supply apparatus for cleaning chips and the like accumulated on the bed 30 or the like inside the machine tool 3 using a coolant. The coolant is temporarily stored in the reserve tank. 4 is stored in advance and discharged at a certain timing at a stroke, so that the chips accumulated around the nozzles 44 and 52 in the upper surface recess 34 of the bed are reliably cleaned.

  Further, in the first embodiment, since the coolant is discharged at once using the energy at the position of the coolant stored in advance in the reserve tank disposed above the bed, the conventional coolant discharge This has the effect of eliminating the need for power.

  Furthermore, in the first embodiment, since the coolant stored in advance in the reserve tank 4 is discharged at a constant timing, the coolant is not always discharged as in the prior art. It is possible to suppress the possibility of coolant intrusion into oil, and to improve the reliability and life.

  In the coolant supply apparatus of the first embodiment, the bed cleaning pump 21 supplies the coolant in the coolant tank 2 to the reserve tank 4, and the reserve disposed at a position higher than the bed 30. Since the coolant is stored in advance in the tank 4 during processing, it is possible to use a small-capacity pump as the bed cleaning pump 21, further downsizing the equipment, saving the amount of coolant, and reducing the coolant flow rate. This has the effect of reducing the size of the coolant tank.

  Further, in the coolant supply apparatus of the first embodiment, the liquid level of the coolant supplied and stored in the reserve tank 4 by the bed cleaning pump 21 by the liquid level sensor 42 has reached a certain level. Is detected and the driving of the bed cleaning pump 21 is stopped, so that the power consumption for driving the bed cleaning pump is minimized.

  Further, the coolant supply device of the first embodiment is configured such that the coolant stored in the reserve tank 4 is transferred to the bed at the end of machining by switching control of the switching control valve 50 based on a control signal from the control device 6. Since it supplies, the effect of enabling the cleaning of the chip | tip at the optimal timing is produced.

  Further, in the coolant supply device of the first embodiment, the chip removing separator 7 removes chips contained in the coolant supplied to remove chips on the bed 34, and only the coolant is used. Since the coolant is supplied to the coolant tank 2, there is an effect that the coolant from which chips are removed can be stored in the reserve tank 4.

  That is, it is possible to prevent chips from accumulating in the coolant tank 2 and at the same time to clean the bed in which the chips inside the machine tool are accumulated with clean coolant, and to use the bed cleaning pump and the bed cleaning This prevents the chips from being mixed into the valve and prevents damage.

  Further, the coolant supply apparatus of the first embodiment includes the processing pump 24 in the pipe line 25 connecting the coolant tank 2 and the workpiece processing portion, and the coolant tank 2, the processing pump 24, and the workpiece. Since the circulation path composed of the processing section, the bed 30 and the chip removal separator 7 is configured, the work processing section is cooled and cleaned, thereby extending the life of the tool to be processed and processing work. It is possible to improve the performance, and at the same time, it is possible to cool and clean the workpiece processing part again with clean coolant, and further to automate the series of operations.

  Next, in the coolant supply apparatus and method of the second embodiment, as shown in FIG. 4, the first embodiment described above for an example of cleaning chips and the like accumulated on a bed or the like inside a plurality of machine tools. A case where two machine tools that perform the same processing as the machine tool used in the example are arranged side by side will be described as an example.

  In the second embodiment, in addition to the configuration in which each machine tool 3, 3 ′ is provided in the machine tool itself, pipes 25, 25 ′ and pumps 24, 24 for supplying coolant to the workpiece machining section. ′, Nozzles 26, 26 ′, pipes 41, 41 ′ for supplying coolant from the reserve tank 4 to the bed, bed washing valves 5, 5 ′, on-off valves 50, 50 ′, pipes 51, 51 ′, Nozzles 52, 52 ', cables 60, 60' connecting the bed cleaning valve and the control device, and pipes 35, 35 'connecting the upper surface recesses 34, 34' of the beds 30, 30 'and the chip removal separator. They are arranged side by side.

  With the above configuration, in the coolant supply device of the second embodiment, the control device 6 temporarily stores in the reserve tank 4 with respect to the upper surface recesses 34 and 34 ′ of the beds 30 and 30 ′ in the plurality of machine tools. The discharged coolant is discharged all at once, so that the chips accumulated around the nozzles 26, 26 ', 52, 52' in the upper surface recesses 34, 34 'of the plurality of beds 30, 30' can be surely cleaned together. Play.

  In the second embodiment, the coolant tank 2, the reserve tank 4, the control device 6, and the chip removal separator 7 are provided only in one set, and the beds 30, that is, the two machine tools 3, 3 ', It is possible to clean chips and the like accumulated in the upper surface recesses 34, 34 'of 30'.

  Furthermore, in the coolant supply apparatus and method of the second embodiment, chips and the like accumulated on a plurality of machine tool beds and the like are stored in the one coolant tank 2, the reserve tank 4, the control device 6, and the chip removal separator 7. Therefore, it is not necessary to provide the one coolant tank 2, the reserve tank 4, the control device 6, and the chip removal separator 7 for each machine tool, which leads to downsizing and simplification of equipment. As a result, the equipment cost can be reduced, and at the same time, the cleaning operation of a plurality of machine tools can be automated and centrally controlled.

  The above-described embodiments have been illustrated for the purpose of explanation, and the present invention is not limited thereto. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the description of the drawings. Modifications and additions can be made without departing from the technical idea of the present invention.

  Moreover, although the above-mentioned Example demonstrated the example which uses a grindstone as a tool as shown in FIG. 1 as an example, it is not limited to what was illustrated as this invention, A cutting machine as needed, The present invention can be applied to chips such as a polishing machine, machine tools that generate grinding waste and waste, and other devices that generate waste.

  Further, in the above-described embodiment, an example in which the bed cleaning valve is opened for 5 seconds after the processing is once completed as shown in the flowchart of FIG. 2 is described as an example. However, the present invention is limited to the illustrated example. The valve opening time can be adjusted according to the amount of chips generated, etc. as needed, and if the amount of chips generated and accumulated is simply large, Applied to a system in which the valve is opened for a certain period of time when the coolant level in the reserve tank reaches a certain level without determining whether or not the operation has been completed. Is something that can be done.

  In the above-described embodiment, as shown in FIG. 1 as an example, the chips passing through the pipe 35 provided in the bed upper surface recess 34 are removed in the chip removal separator 7 to be in a clean state. However, the present invention is not limited to the illustrated example, and chips are formed at the most upstream ends of the pipe line 22 and the pipe line 25 as necessary. A separator for removal is disposed, clean coolant is supplied to the workpiece processing portion and the bed upper surface recess 34, and the coolant including chips and the like passes through the pipe line 35 provided in the bed upper surface recess 34. The invention can be applied to a configuration in which the coolant tank 2 directly collects and other modes.

  Furthermore, although the above-mentioned Example demonstrated the example in which the machine tool of two similar specifications shared a set of coolant tank, a reserve tank, a control apparatus, and the chip removal separator as an example was shown by FIG. The present invention is not limited to the one shown in the figure, and if necessary, a plurality of machine tools are arranged in parallel, and the coolant tank, the reserve tank, the control device, the chip removal separator are shared, and concentrated. The present invention can be applied to other modes in which control is performed.

  Furthermore, in the above-described embodiment, an example in which a bed cleaning pump constituting a coolant supply device is added as an example has been described. However, the present invention is not limited to this, and the processing pump is a variable discharge flow rate type. If there is sufficient margin in capacity and capacity, as shown in FIG. 5, a branch pipe that communicates with the reservoir tank is connected to a pipe that communicates with the nozzle for cooling the machining section where the machining pump is disposed. In addition, a switching valve that can be connected and shut off is provided in the branch pipe similar to the above-described bed cleaning valve, and when the coolant is stored in the reservoir tank in advance, the switching valve is in a communication state. It is also possible to adopt an embodiment in which the discharge flow rate of the processing pump is increased by that amount, and the other configurations are the same as in the above-described embodiment.

  In a coolant supply device that uses a coolant to clean chips and the like accumulated on a bed inside a machine tool, the coolant is temporarily stored in a reserve tank, and then discharged at a certain timing around the bed and nozzles. This makes it possible to reliably clean the coolant deposited on the equipment, further reduce the size of the equipment and save the coolant, and at the same time, can be applied to applications where it is necessary to reduce the risk of coolant entering the equipment and lubricating oil. .

1 is a block diagram illustrating the entirety of a coolant supply apparatus according to a first embodiment of the present invention. It is the flowchart which showed the specific control procedure of the control apparatus of the 1st Example. It is the diagram which showed the coolant discharge amount required in order to wash | clean the chips etc. which accumulated on the bed in the conventional coolant supply apparatus and the coolant supply apparatus of the 1st Example. It is a block diagram which shows the whole coolant supply apparatus of 2nd Example of this invention. It is a block diagram which shows the whole modification of the coolant supply apparatus of the Example of this invention. It is a block diagram which shows the coolant supply apparatus of the conventional Example.

Explanation of symbols

2 Coolant tank 3 Machine tool 4 Reserve tank 42 Level gauge 5 Switching control valve 6 Control device 7 Chip removal separator 21 Bed washing pump 30 Bed

Claims (7)

In the coolant supply device that uses the coolant to clean the chips accumulated on the bed inside the machine tool,
A reserve tank disposed at a position higher than the bed, in which the coolant is temporarily stored;
A coolant supply device, comprising: a control device that controls the coolant once stored in the reserve tank to be discharged at a constant timing. In claim 1,
A coolant supply device comprising a bed cleaning pump for supplying coolant in a coolant tank to the reserve tank. In claim 2,
A coolant supply device comprising: a liquid level sensor for detecting that the level of coolant supplied and stored in the reserve tank by the bed cleaning pump has reached a certain level. In claims 1 to 3,
A coolant supply device, comprising: a switching control valve that performs switching control to supply the coolant stored in the reserve tank to the bed at the end of processing based on a control signal from the control device. In Claims 1 to 4,
A coolant supply device comprising a chip removal separator for removing chips contained in the coolant supplied to remove chips on the bed, and supplying only the coolant to the coolant tank. In claim 1,
A coolant supply device, comprising: a control device that controls the coolant once stored in the reserve tank to be discharged to a bed inside a plurality of machine tools at once. In a coolant supply method for cleaning chips accumulated on a bed or the like inside a machine tool using a coolant,
The coolant is once stored in a reserve tank disposed at a position higher than the bed,
A coolant supply method, wherein the coolant once stored in the reserve tank is controlled to be discharged at a constant timing.

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