TWI418417B - Tool cleaning equipment - Google Patents

Description

Tool cleaning device

The present invention relates to a tool cleaning device for cleaning a tool and a tool holder that are attached to a spindle of a machine tool. The tool cleaning device flushes the attachments (cut powder, etc.) on the surface of the tool and tool holder.

The working machine is a variety of types of machining such as milling, tapping, and tapping, and is performed by automatically exchanging tools. The working machine is provided with a tool storage unit and a tool exchange device. The tool storage unit accommodates a plurality of types of tools while being held by the tool holder. The tool storage unit sends the required tools to the exchange position. The tool exchange device is a collection tool at the exchange location. The tool exchange device is a spindle that carries and installs the collected tool to the work machine. At the same time, the tool exchange device removes the tool that is used from the spindle. The tool exchange device transports the removed tool toward the exchange position and returns to the tool storage portion.

The tool holder has a spindle mounting portion and a tool holding portion. The spindle mounting portion has a slightly conical shape. The tool holding portion holds a tool such as a drill bit or a screw tap. The spindle is equipped with a tool mounting hole. The tool mounting hole is a conical hole corresponding to the spindle mounting portion. The main shaft has a draw-bar at the bottom of the tool mounting hole.

The tool exchange device inserts the spindle mounting portion of the tool holder into the tool mounting hole. Pulling the rod is to pull up the end of the spindle mounting portion and fix the tool holder to the spindle. The outer peripheral surface of the spindle mounting portion positions the spindle and the tool concentrically by being closely attached to the tool mounting hole.

The main shaft is located inside the processing chamber. Inside the processing chamber, there is a cut powder produced by the processing. The cut powder will adhere to the tool holder that is mounted on the front of the spindle. A part of the cut powder enters between the outer peripheral surface of the spindle mounting portion and the tool mounting hole.

The tool is not properly positioned for the spindle due to the influence of the cutting powder attached to the spindle mounting portion. Therefore, if the tool is rotated in an eccentric state, there is a problem that the machining accuracy is lowered. When the amount of cut powder is large, the tool cannot be mounted on the spindle. The operator needs to stop the machining and remove the cutting powder attached to the tool holder and the spindle.

The working machine disclosed in Japanese Laid-Open Patent Publication No. 2002-273640 is provided with a tool washing device. The tool cleaning device is a tool that is cleaned before the spindle. The tool cleaning device is a cleaning liquid nozzle that discharges the cleaning liquid toward the tip end portion of the main shaft. The cleaning liquid nozzle is connected to the cleaning liquid supply source and the air source (Compressor).

The cleaning liquid is a coolant that cools both the tool and the workpiece during processing. The cleaning liquid supply source includes a tank that stores the washing liquid (cooling liquid) and a washing liquid (cooling liquid) that is sent out of the pump. In the pump, the cleaning liquid in the tank is sent out until the discharge port of the washing liquid nozzle. The main purpose of the pump is as a supply of coolant. The discharge pressure of the pump is about 0.03 MPa. When the discharge pressure of the pump is not sufficient as the pressure at which the coolant is ejected from the washing liquid nozzle.

The air source supplies the air blown from the auxiliary cleaning liquid to the washing liquid nozzle. The cleaning liquid is ejected from the washing liquid nozzle by a high speed by the action of the air. The cleaning solution is in contact with the tool and the tool holder, and the powder is attached to the tool and the tool holder for rinsing.

In the conventional tool cleaning device, the cleaning liquid nozzle ejects a mixture of the cleaning liquid and the air. The mixture of the cleaning liquid and the air is ejected from the cleaning liquid nozzle, but the cleaning liquid is dispersed by the air. Therefore, the conventional tool cleaning device requires a long washing time in order to remove the cut powder well. A working machine having a conventional tool cleaning device has a problem that it takes a long time to exchange tools including tool cleaning, and has a long processing time.

In the conventional tool cleaning device, the cleaning liquid supply unit (slot and pump) is disposed at a position away from the cleaning liquid nozzle. The cleaning solution is passed through a long washing liquid passage to the washing liquid nozzle. The amount of liquid discharged from the cleaning liquid nozzle is unstable due to the influence of the passage resistance, the pulsation of the pump, and the like. Conventional tool cleaning devices may fail to obtain the desired cleaning effect.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tool cleaning device which can stably eject a large amount of cleaning liquid and can clean the tool well in a short time.

The tool cleaning device according to the first aspect of the invention includes: a tank for storing the washing liquid, a washing liquid nozzle for discharging the washing liquid, and a nozzle for connecting the washing liquid nozzle and the tank; The cleaning liquid in the tank is supplied to the cleaning liquid passage of the cleaning liquid nozzle, and the tool installed before the main shaft of the working machine is washed from the cleaning liquid nozzle through the cleaning liquid passage. The cleaning liquid is provided with a storage portion in the cleaning liquid passage, and the cleaning liquid flowing in the cleaning liquid passage can be temporarily stored.

The cleaning liquid nozzle ejects the cleaning liquid stored in the storage unit. The storage portion is located in the vicinity of the washing liquid nozzle. The cleaning liquid in the storage portion reaches the cleaning liquid nozzle through a short passage. The cleaning liquid nozzle can stably eject the cleaning liquid without being affected by the passage resistance and the pulsation of the pump.

In the tool cleaning device of the second aspect of the invention, the liquid supply valve that opens and closes the cleaning liquid passage is provided in the cleaning liquid passage between the storage portion and the cleaning liquid nozzle.

In the cleaning liquid nozzle, the cleaning liquid is ejected by opening the liquid supply valve. In the storage portion, the cleaning liquid is stored while the liquid supply valve is closed. The tool cleaning device can perform the cleaning operation by opening and closing the liquid supply valve.

The tool cleaning device according to the third aspect of the invention, comprising: a pressure passage and a pressure discharge passage connected to the storage portion; a pressure valve that opens and closes the pressure passage; and a pressure discharge that opens and closes the pressure discharge passage valve.

In the pressurizing passage, the inside of the storage portion is pressurized by opening the pressurizing valve. The cleaning liquid in the storage portion is ejected from the cleaning liquid nozzle under pressure. The cleaning solution is sprayed out with great force, and the tool and tool holder are cleaned. The pressure discharge passage is configured to discharge the inside of the storage portion by opening the pressure discharge valve. The storage portion can store the washing liquid without resistance.

The tool cleaning device according to the fourth aspect of the invention includes a control device for controlling opening and closing of the liquid supply valve, the pressure valve, and the pressure discharge valve, wherein the control device is configured to: open the liquid supply valve and the pressure valve And a cleaning operation of supplying the cleaning liquid to the cleaning liquid nozzle while the pressure regulating valve is closed; and closing the liquid supply valve and the pressure valve, and opening the pressure discharge valve The storage operation of storing the cleaning liquid in the storage unit; and the standby operation in which the liquid supply valve, the pressure valve, and the pressure relief valve are closed.

When the control device is cleaned, the liquid supply valve and the pressure valve are opened, and the pressure discharge valve is closed. The cleaning liquid in the storage portion is ejected from the cleaning liquid nozzle in a pressurized state. The control device turns off the liquid supply valve and the pressure valve after the cleaning is completed, and opens the pressure discharge valve. In the storage portion, the washing liquid is stored without resistance. The control device closes the liquid supply valve, the pressure valve, and the pressure relief valve after the storage is completed. The storage unit maintains the state in which the cleaning liquid is stored. The cleaning liquid nozzle waits until the next discharge. The control device can perform the discharge and storage of the cleaning liquid by controlling the opening and closing of the liquid supply valve, the pressure valve, and the pressure discharge valve.

The tool cleaning device according to the fifth aspect of the invention includes a control device for controlling opening and closing of the liquid supply valve, the pressure valve, and the pressure release valve, wherein the control device is configured to: open the liquid supply valve and the pressure valve And a cleaning operation of supplying the cleaning liquid to the cleaning liquid nozzle while the pressure regulating valve is closed; and closing the liquid supply valve and the pressure valve, and opening the pressure discharge valve The storage operation of storing the cleaning liquid in the storage unit; and the standby operation in which the liquid supply valve and the pressure release valve are closed and the pressure valve is opened.

When the control device is cleaned, the liquid supply valve and the pressure valve are opened, and the pressure discharge valve is closed. The cleaning liquid in the storage portion is ejected from the cleaning liquid nozzle in a pressurized state. The control device turns off the liquid supply valve and the pressure valve after the cleaning is completed, and opens the pressure discharge valve. In the storage portion, the washing liquid is stored without resistance. The control device waits for the liquid supply valve and the pressure relief valve to be closed after the storage is completed, and the pressure valve is opened. The storage unit stands by in a state where the stored cleaning liquid is pressurized. The cleaning liquid nozzle ejects the cleaning liquid in a pressurized state at the time of the next discharge. The washing liquid is sprayed out from the beginning of the discharge, and the tool and the tool holder are reliably washed.

The tool cleaning device of the sixth aspect of the invention is further provided with a liquid amount sensor for detecting the amount of liquid in the storage portion, wherein the control device until the amount of the detected liquid of the liquid amount sensor reaches a predetermined amount The aforementioned storage operation is carried out.

In the storage portion, a predetermined amount of the cleaning liquid can be stored. The cleaning liquid nozzle ejects the retentate of the storage portion. In the cleaning liquid nozzle, a predetermined amount of the cleaning liquid is ejected without any shortage, and the tool and the tool holder can be reliably washed.

The tool cleaning device according to claim 7 further includes a check valve disposed on the cleaning liquid passage between the tank and the storage portion, and stops washing from the storage portion toward the tank The flow of clean liquid.

The check valve prevents the washing liquid stored in the storage portion from flowing backward. The cleaning liquid nozzle is capable of ejecting the entire amount of the cleaning liquid in the storage portion.

The tool cleaning device of the eighth aspect of the invention is further provided with an opening and closing valve that is disposed in the cleaning liquid passage between the tank and the storage portion, and opens and closes the cleaning liquid passage.

The opening and closing valve is closed by the cleaning to prevent the washing liquid stored in the storage portion from flowing backward. The cleaning liquid nozzle is capable of ejecting the entire amount of the cleaning liquid in the storage portion.

The tool cleaning device according to the ninth aspect of the invention, wherein the opening and closing valve has a switching position for discharging the cleaning liquid, and includes a filter disposed in the cleaning liquid passage between the opening and closing valve and the storage portion. In the standby operation, the control device performs a filter cleaning operation in which the opening and closing valve is located at the switching position, and the cleaning liquid in the storage portion is reversely flowed to the filter, and the filter is washed. .

The control device is a switching position that can switch the opening and closing valve after the cleaning operation to the discharge. The washing liquid in the storage portion is caused to flow in the opposite direction in the filter, and the foreign matter removed by the filter is washed. The cleaned filter can be kept clean. The tool cleaning device of claim 9 is capable of preventing clogging of the filter and performing a good washing action over a long period of time.

The tool cleaning device according to claim 10, wherein the storage portion includes a first storage portion and a second storage portion that are arranged in parallel, and the cleaning portion is supplied to the cleaning liquid nozzle, or in the first storage portion or When the amount of the cleaning liquid in the second storage portion is equal to or less than the predetermined amount, the flow path to the cleaning liquid nozzle can be switched to the second storage portion or the first storage portion in the standby state of the supply of the cleaning liquid.

In the cleaning liquid nozzle, the cleaning liquid stored in any of the first storage portion and the second storage portion is discharged. The first storage unit is used in normal use. The second storage portion is used when the amount of the cleaning liquid in the first storage portion is insufficient. The cleaning liquid nozzle ejects the retentate of the second storage unit. The first storage unit stores the cleaning liquid during use of the second storage unit. In the second storage portion, the cleaning liquid is stored in the use of the first storage portion. In the first storage portion and the second storage portion, since the storage portion is in the storage state, the cleaning liquid nozzle can eject a sufficient amount of the cleaning liquid at any time. The tool cleaning device of claim 10 of the patent application is suitable for repeated washing in a short period of time.

A tool cleaning device according to claim 11, wherein the cleaning liquid nozzle is disposed at a tip end portion of a spindle head that supports the spindle.

The cleaning liquid nozzle ejects the cleaning liquid from the tip end portion of the spindle head. The cleaning fluid is in contact with the tool and tool holder before the spindle is installed. The tool and tool holder can be cleaned reliably. Poor installation of the tool and tool holder can be well prevented.

Hereinafter, the present invention will be described in detail with reference to the drawings shown in the preferred embodiments.

[Example 1]

As shown in Figs. 1 and 2, the work machine 1 is supported on the ground by a base 2 made of cast iron. The work machine 1 is provided with a control box 3 and a body 4. The body 4 is a pillar that rises perpendicularly to the central portion of the base 2. The work machine 1 is processed inside the processing chamber provided on the front side (the left side of the first and second figures) provided on the body 4.

The control box 3 is attached to the rear side of the body 4 (the right side of the first and second figures). The control box 3 houses the control unit 9 (refer to FIG. 8) therein. The body 4 is supported by the spindle head 5 (refer to FIG. 3) at the front portion thereof. The spindle head 5 can be raised and lowered along the fuselage 4 inside the processing chamber.

As shown in Fig. 3, the spindle head 5 has a spindle 6 at a lower portion thereof. The spindle head 5 is provided with a drive mechanism 7 at its upper portion. The spindle head 5 is driven up and down by the drive mechanism 7. The main shaft 6 is rotated about the axis in the upper and lower directions.

The work machine 1 is further provided with an ATC (Automatic Tool Exchange Device) 8 and a tool cleaning device. As shown in FIGS. 3 and 4, the ATC 8 includes a tool storage unit 17 and a tool exchange mechanism 18. The tool housing portion 17 is disposed on the right side of the spindle head 5. The tool change mechanism 18 is disposed between the spindle head 5 and the tool housing portion 17.

As shown in FIG. 4, the tool housing portion 17 includes a plurality of tool containers 15 attached to the chain 16. The tool container 15 is a tool holder 21 that holds the tool 20 attached (refer to Fig. 6). The tool container 15 is moved by the circulation of the chain 16, and the tool 20 and the tool holder 21 are conveyed toward the exchange position (the lower position of Fig. 4). The tool container 15 is in the exchange position, and the tool 20 and the tool holder 21 are sent out to the outside of the tool storage unit 17.

As shown in Fig. 5, the tool change mechanism 18 is provided with a exchange arm 18a. The exchange arm 18a is rotated around the axis parallel to the main shaft 6, and is raised and lowered. The exchange arm 18a has a grip portion 18b at both end portions thereof. The grip portion 18b is rotated by the exchange arm 18a, and moves toward the exchange position of the tool housing portion 17 and the lower position of the spindle 6. The one grip portion 18b grips the tool holder 21 at the exchange position. The other grip portion 18b grips the tool holder 21 at a lower position of the main shaft 6.

The exchange arm 18a is lowered while the tool holder 21 is gripped. The tool 20 and the tool holder 21 are detached from the tool container 15 and the spindle 6. The exchange arm 18a is rotated 180° after being lowered. The tool 20 and the tool holder 21 are moved from the exchange position to the lower position of the main shaft 6, or from the lower position of the main shaft 6 to the exchange position. The exchange arm 18a is raised after being wound, and the tool 20 and the tool holder 21 are inserted into the spindle 6 or the tool container 15.

As shown in Fig. 6, the tool holder 21 is provided with a spindle mounting portion 21a and a tool holding portion 21b. The tool holding portion 21b is composed of two cylindrical portions having different diameters. The lower cylindrical portion is held by the tool 20. The diameter of the upper cylindrical portion is larger than the diameter of the lower cylindrical portion. The spindle mounting portion 21a is a slightly conical portion continuous with the upper surface of the cylindrical portion.

The main shaft 6 is provided with a tool mounting hole 19 that is open at its lower surface. The tool mounting hole 19 has a conical shape corresponding to the spindle mounting portion 21a. The tool holder 21 is attached to the spindle 6 by fitting the spindle mounting portion 21a into the tool mounting hole 19. The tool holder 21 and the tool 20 are positioned by adhering the spindle mounting portion 21a to the tool mounting hole 19 and adhering the cylindrical upper end surface 21c above the tool holding portion 21b to the lower surface of the spindle 6.

The spindle head 5 is rotatably supported by the spindle 6. The spindle head 5 has a ring-shaped spindle cap 22 at its lower end. The spindle cap 22 is fixed to the underside of the spindle head 5 by a plurality of bolts 23. Below the spindle 6, it is exposed from the center hole of the spindle cap 22. The lower surface of the main shaft 6 and the main shaft cap 22 are closed by the annular end surface cover 24. The end cap 24 is fixed to the lower surface of the main shaft 6 and abuts against the lower surface of the main shaft cap 22.

The tool 20 mounted on the spindle 6 rotates together with the spindle 6. The tool 20 is moved in the vertical direction by the spindle head 5 ascending and descending. The tool 20 processes the workpiece in the processing chamber. The workpiece moves in the horizontal direction together with the processing stage in the processing chamber.

The work machine 1 is equipped with a tool washing device. The tool cleaning device cleans the tool 20 and the tool holder 21 before being mounted on the spindle 6. The spindle cap 22 has a liquid groove 25 underneath. The liquid groove 25 is an annular groove provided under the main shaft cap 22. The liquid groove 25 is formed on the outer side of the outer periphery of the end surface cover 24. The liquid groove 25 is closed by an annular cleaning liquid nozzle forming member 26 attached to the lower surface of the main shaft cap 23. The cleaning liquid nozzle forming member 26 has an annular cleaning liquid nozzle hole 29 that opens toward the lower surface thereof. The cleaning liquid nozzle forming member 26 has a lower surface having a height slightly equal to the lower end surface of the main shaft 6. The cleaning liquid nozzle hole 29 is formed to be inclined toward the center of the spindle head 5 and the spindle 6.

The liquid groove 25 is coupled to the liquid supply hole 27 provided in the spindle cap 22. The liquid supply hole 27 is open to the outer circumference of the main shaft cap 22. The liquid supply hole 27 is connected to the cleaning liquid pipe 28. The cleaning liquid pipe 28 is supplied with a cleaning liquid. The cleaning liquid enters the liquid groove 25 through the liquid supply hole 27, and is ejected from the cleaning liquid nozzle hole 29. As shown in Fig. 6, the cleaning liquid A is ejected in the direction of the cleaning liquid nozzle hole 29, and the tool holder 21 and the tool 20 located under the main shaft 6 are washed. The cleaning liquid nozzle forming member 26 and the cleaning liquid nozzle hole 29 constitute a cleaning liquid nozzle 30. The liquid groove 25, the liquid supply hole 27, and the cleaning liquid pipe 28 are a part of the cleaning liquid supply path.

As shown in Fig. 1, the work machine 1 is provided with a coolant assembly 10. The coolant unit 10 includes a storage tank 11, a recovery tank 12, a first pump 13, and a second pump 14. The storage tank 11 stores the coolant (cleaning liquid) supplied into the processing chamber. As shown in Fig. 1, the storage tank 11 is a box-shaped container. The recovery tank 12, the first pump 13, and the second pump 14 are provided on the upper surface of the storage tank 11.

As shown in FIGS. 1 and 2, the coolant assembly 10 is detachably provided on the rear side of the base 2. The recovery tank 12 is connectable to the discharge portion 2a of the base 2. The recovery tank 12 collects the used coolant (washing liquid) concentrated in the discharge unit 2a in the processing chamber. The recovery tank 12 is continuous toward the storage tank 11. The coolant (cleaning liquid) in the recovery tank 12 is returned to the storage tank 11 by a filtering device (not shown).

In the first pump 13 and the second pump 14, the coolant (washing liquid) in the storage tank 11 is sucked up and sent out into the processing chamber. The first pump 13 is a pump for using both a coolant and a cleaning liquid. As shown in Fig. 7, the discharge side of the first pump 13 is connected to the first coolant pipe 31. The first coolant pipe 31 extends toward the inside of the processing chamber. The coolant is ejected from the coolant cleaning liquid nozzle (not shown) provided at the tip end of the first coolant pipe 31 toward the processing chamber. The coolant is used to cool the tools and processed materials in the process.

The second pump 14 is a pump dedicated to the coolant. The discharge side of the second pump 14 is connected to the second coolant pipe (not shown). The second coolant pipe extends toward the inside of the processing chamber. The coolant is ejected from the coolant cleaning liquid nozzle (not shown) provided at the tip end of the second coolant pipe toward the processing chamber. The discharge pressure of the first pump 13 is 0.030 to 0.045 MPa. The discharge pressure of the second pump 14 is larger than the discharge pressure of the first pump 13. The coolant sent from the second pump 14 cools the tool and the workpiece during processing, and rinses the cut powder generated in the processing unit.

The first coolant pipe 31 divides the cleaning liquid pipe 32 in the middle thereof. The cleaning liquid pipe 32 is connected to the cleaning liquid nozzle 30 through the cleaning liquid pipe 28. The cleaning liquid is a part of the coolant sent from the first pump 13. The cleaning liquid flows through the cleaning liquid pipe 32 and the cleaning liquid pipe 28. As described above, the cleaning liquid flowing through the cleaning liquid pipe 28 is discharged from the cleaning liquid nozzle hole 29 through the liquid supply hole 27 and the liquid groove 25. The cleaning liquid sprayed from the cleaning liquid nozzle 30 cleans the tool holder 21 and the tool 20. The washing liquid that has been washed is returned to the discharge portion 2a of the base 2 as described above, and is returned to the storage tank 11 through the recovery tank 12.

The cleaning liquid supply path of the tool cleaning device is composed of a part of the first cooling liquid pipe 31, the cleaning liquid pipe 32, the cleaning liquid pipe 28, the liquid supply hole 27, and the liquid groove 25. As shown in Fig. 7, the cleaning liquid pipe 32 is provided with a filter 33, a check valve 34, and a liquid supply valve 35 in the middle thereof. The filter 33 removes foreign matter in the washing liquid. The check valve 34 is disposed on the downstream side of the filter 33. The check valve 34 allows the flow toward the cleaning liquid nozzle 30 in the cleaning liquid pipe 32, and the reverse flow toward the first cooling liquid pipe 31 is prohibited.

The liquid supply valve 35 is disposed on the downstream side of the check valve 34. As shown in Fig. 7, the liquid supply valve 35 is normally closed. The liquid supply valve 35 is connected to the air pressure source 39 through the air passage 40. The liquid supply valve 35 is switched to the open position by the action of the air pressure supplied from the air passage 40. The cleaning liquid nozzle 30 discharges the cleaning liquid while the liquid supply valve 35 is open.

The air passage 40 is provided with a first electromagnetic valve 43 in the middle thereof. As shown in Fig. 7, the first electromagnetic valve 43 is normally closed. Air remains in the air passage 40, and is silenced by the muffler 43a and released. The first electromagnetic valve 43 is switched to the open position in accordance with an opening command given by the control unit 9 (corresponding to the control device). The air pressure source 39 is opened by the first electromagnetic valve 43, and the air pressure is supplied to the liquid supply valve 35 through the air passage 40. In the cleaning liquid nozzle 30, the cleaning liquid is discharged by opening the first electromagnetic valve 43. The air pressure source 39 is an equipment that can be used in a factory equipped with the work machine 1. When the air pressure source 39 cannot be secured, the liquid supply valve 35 can be opened and closed by an operation command of the control unit 9.

The cleaning liquid pipe 32 further includes a storage portion 50 in the middle thereof. The storage portion 50 is a container in which a predetermined amount of the cleaning liquid can be stored therein. The storage unit 50 is disposed between the check valve 34 and the liquid supply valve 35. The cleaning liquid in the cleaning liquid pipe 32 flows into the storage portion 50 while the liquid supply valve 35 is closed. The storage unit 50 temporarily stores the cleaning liquid flowing from the cleaning liquid pipe 32. The storage unit 50 shown in Figs. 1 and 2 is mounted in parallel with the control box 3 at the rear of the body 4.

As shown in Fig. 7, the upper portion of the reservoir portion 50 is connected to the air pressure source 39 through the air passage 42. The air passage 42 is provided with a throttle valve 48, a pressure valve 45, and a check valve 49 in the middle thereof. The pressurizing valve 45 is normally closed. The pressurizing valve 45 is switched to the open position by the action of the air pressure supplied from the air passage 46. The air in the air passage 42 flows into the storage portion 50 while the pressurizing valve 45 is opened. The pressure in the storage portion 50 rises due to the action of the air pressure flowing through the air passage 42. The air passage 46 is branched on the way of the air passage 40. The pressurizing valve 45 is switched to the open position simultaneously with the liquid supply valve 35. The air pressure in the storage portion 50 is such that the cleaning liquid stored in the storage portion 50 is pushed out into the cleaning liquid pipe 32. The cleaning liquid is ejected from the cleaning liquid nozzle 30 through the liquid supply valve 35.

The throttle valve 48 is a variable throttle valve. The throttle valve 48 is a permission to supply air from the air pressure source 39 or a prohibition of the air supply. The throttle valve 48 is typically a permit to select the feed air. The check valve 49 prohibits air from flowing back from the storage portion 50.

As shown in Fig. 7, the storage portion 50 is provided with a pressure discharge passage 37 connected to the upper portion thereof. The pressure discharge passage 37 is provided with a pressure discharge valve 38 in the middle thereof. The pressure relief valve 38 is normally in the open position. The pressure relief valve 38 is in the open position, and the pressure discharge passage 37 discharges the air pressure in the storage portion 50 through the pressure discharge valve 38 toward the processing chamber.

The pressure relief valve 38 is switched to the closed position by the action of the air pressure supplied from the air passage 41. The air passage 41 is provided with a second electromagnetic valve 44 in the middle thereof. The second electromagnetic valve 44 is normally closed. In the second electromagnetic valve 44, the residual air is silenced by the muffler 44a in the air path 41, and then released. The second electromagnetic valve 44 is switched to the open position in accordance with the opening command given by the control unit 9. The air pressure source 39 is opened by the second electromagnetic valve 44, and the air pressure is supplied to the pressure discharge valve 38 via the air passage 41. The pressure discharge valve 38 closes the pressure discharge passage 37 to seal the storage portion 50. The air pressure in the storage unit 50 is raised by turning on the first and second electromagnetic valves 43 and 44 (ON). The air pressure in the storage unit 50 is lowered by closing (opening) the first and second electromagnetic valves 43 and 44.

The storage unit 50 is provided with a liquid level sensor 36. The liquid level sensor 36 is mounted at a predetermined height position from the bottom of the storage portion 50. The liquid level sensor 36 is turned ON when the liquid level of the cleaning liquid in the storage unit 50 reaches the mounting height of the liquid level sensor 36. The mounting position of the liquid level sensor 36 is determined based on the amount of the liquid to be stored in the storage unit 50, which is the amount of the washing liquid to be discharged from the washing liquid nozzle 30. The cleaning liquid nozzle 30 is a cleaning liquid that is ejected once, for example, for 5 seconds.

As shown in Fig. 8, the control unit 9 is a computer in which the CPU 9a, the ROM 9b, the RAM 9c, the input interface 9d, and the output interface 9e are connected by the path 9f. The control unit 9 controls the machining operation of the machine tool 1 by the operation of the CPU 9a by the control program housed in the ROM 9b. The control range of the control unit 9 includes control of rotation, rise and fall of the tool 20, movement control of the processing stage, operation control of the ATC 8, and control of the tool cleaning apparatus. Figure 8 is a portion showing only the control associated with the tool cleaning device.

The input interface 9d is connected to the operation unit 90, the liquid level sensor 36, and the pressure sensor 91. The operation unit 90 is used for the purpose of inputting information necessary for processing by the operator. As described above, the liquid level sensor 36 detects the amount of the retentate in the storage unit 50. The pressure sensor 91 detects the pressure in the air passages 40, 41, and 42. The input interface 9d is provided to the CPU 9a by the input information of the operation unit 90 and the detection results of the liquid level sensor 36 and the pressure sensor 91.

The output interface 9e is connected to the drive circuit 82 of the first pump 13, the drive circuit 83 of the first electromagnetic valve 43, and the drive circuit 84 of the second electromagnetic valve 44. The CPU 9a applies an operation command to the drive circuit 82 through the output interface 9e, and drives the first pump 13. The CPU 9a applies an opening command to the drive circuit 83 through the output interface 9e, and turns on the first electromagnetic valve 43 (ON). The CPU 9a applies an opening command to the drive circuit 84 through the output interface 9e, and turns on the second electromagnetic valve 44 (ON).

When the first electromagnetic valve 43 is turned "ON", the liquid supply valve 35 is opened by the air supply from the air pressure source 39. As described above, the cleaning liquid nozzle 30 discharges the cleaning liquid by opening the liquid supply valve 35.

When the first electromagnetic valve 43 is turned "ON", the pressurizing valve 45 is opened by the air supply from the air pressure source 39. When the second electromagnetic valve 44 is turned "ON", the pressure discharge valve 38 is closed by the air supply from the air pressure source 39. The pressure in the storage portion 50 rises due to the air pressure flowing through the air passage 42, and the retentate in the storage portion 50 is pushed out into the cleaning liquid pipe 32. The cleaning liquid is ejected from the cleaning liquid nozzle 30 at a high speed, and the tool 20 and the tool holder 21 are washed.

The liquid supply valve 35 and the pressure valve 45 are closed by the first electromagnetic valve 43 being opened (OFF). The pressure discharge valve 38 is opened by the second electromagnetic valve 44 being opened (OFF). The liquid supply valve 35 is a feed that blocks the cleaning liquid toward the cleaning liquid nozzle 30. The pressure in the storage portion 50 is lowered by the pressure release and the pressure discharge. The cleaning liquid in the cleaning liquid pipe 32 flows into the storage portion 50 and stays in the storage portion 50.

The CPU 9a of the control device 9 performs a cleaning operation by the following program (refer to FIG. 9). The CPU 9a executes the program by a predetermined cycle. The CPU 9a reads various signals (S1). The various signals are the detection signal of the liquid level sensor 36, the detection signal of the pressure sensor 91, and the like. The CPU 9a determines whether or not the air pressure in the air passages 40, 41, 42 is normal (S2). The discrimination of S2 is performed based on the detection signal of the pressure sensor 91. When the air pressure is abnormal (S2: No), the CPU 9a turns off the first electromagnetic valve 43 and the second electromagnetic valve 44 (S15), and does not perform the washing operation.

When the air pressure is normal (S2: Yes), the CPU 9a determines the driving state of the first pump 13 (S3). When the first pump 13 is in the non-driving state (S3: No), the CPU 9a does not perform the washing operation.

When the first pump 13 is in the driving state (S3: Yes), the CPU 9a checks the detection signal of the liquid level sensor 36 (S4). When the liquid level sensor 36 is turned off (S4: No), the CPU 9a determines that the amount of the cleaning liquid in the storage unit 50 is insufficient (S14), and the first electromagnetic valve 43 and the second electromagnetic valve are used. 44 OFF (S9). When the liquid level sensor 36 is turned "ON" (S4: Yes), the CPU 9a determines whether or not the tool exchange command is present (S5). In the case of no tool exchange command (S5: No), the CPU 9a does not perform the cleaning operation. In the machining program processing control to be described later, the CPU 9a stores the tool exchange command in the RAM 9c before executing the tool exchange command as the machining program controls each mechanism. The CPU 9a determines whether or not there is a tool exchange command with reference to the RAM 9c. The CPU 9a executes the machining program processing control by a predetermined cycle. The CPU 9a interprets and executes the operation block of the machining program every one block.

When the air pressure in the air passages 40, 41, and 42 is normal (S2: Yes), the first pump 31 is in the driving state (S3: Yes), and the amount of the liquid remaining in the storage portion 50 is sufficient, The cleaning operation is performed on condition that the tool exchange command (S5: Yes) is performed.

The CPU 9a turns on the first electromagnetic valve 43 and the second electromagnetic valve 44 (S6). The liquid supply valve 35 is opened. The reservoir 50 pushes the retentate by the action of the air pressure. The cleaning liquid nozzle 30 is configured to eject the cleaning liquid force.

The CPU 9a is an operation to permit the ATC 8 (S7). The ATC 8 starts the tool exchange in the tool exchange processing (not shown) by the CPU 9a permission operation. Moreover, the tool exchange processing is a program housed in the ROM 9b. When the license tool exchange is started, the CPU 9a executes the tool exchange process by the distribution process different from the above-described allocation process.

The CPU 9a is a detection signal for investigating the liquid level sensor 36 (S8). When the liquid level sensor 36 is OFF (S8: Yes), the CPU 9a turns off the first electromagnetic valve 43 and the second electromagnetic valve 44 (S9). The cleaning liquid nozzle 30 is a discharge of the final cleaning liquid.

When the liquid level sensor 36 is not turned OFF (S8: No), the CPU 9a determines whether or not the tool exchange is completed (S13). In the case of tool exchange (S13: No), the CPU 9a is a decision to repeat S8 and S13. When the tool exchange is completed (S13: Yes), the CPU 9a turns off the first electromagnetic valve 43 and the second electromagnetic valve 44 (S9).

Whether or not the tool exchange is completed is determined by whether or not the position of the spindle head 5 in the Z-axis direction reaches the tool exchange completion position. The position of the spindle head 5 in the Z-axis direction is detected by an encoder (not shown).

In the cleaning liquid nozzle 30, the cleaning of the cleaning liquid is terminated by closing the liquid supply valve 35. The internal pressure of the reservoir portion 50 is lowered by the pressure valve 45 being closed and the pressure relief valve 38 is opened. The cleaning liquid flowing in the cleaning liquid pipe 32 flows into the storage portion 50 and stays in the storage portion 50.

The cleaning liquid nozzle 30 ejects the cleaning liquid until the storage liquid in the storage unit 50 is reduced or the tool exchange is completed. The storage unit 50 pushes out the stored cleaning liquid inside. Therefore, the cleaning liquid nozzle 30 can discharge the cleaning liquid with a good influence, and the tool 20 and the tool holder 21 can be satisfactorily cleaned.

The storage portion 50 is located in the vicinity of the cleaning liquid nozzle 30. The cleaning liquid is ejected from the cleaning liquid nozzle 30 after flowing for a short distance. The passage resistance between the storage portion 50 and the cleaning liquid nozzle 30 is reduced. The washing liquid can be stably ejected with high responsiveness.

The liquid supply valve 35, the pressure discharge valve 38, and the pressure valve 45 are opened by the action of the air pressure. Therefore, the pressure relief valve 38 and the pressure valve 45 are safer than the solenoid valve that is operated by electric power. The liquid supply valve 35 and the pressure valve 45 are simultaneously opened by turning on the first electromagnetic valve 43. Therefore, the pressurization in the storage portion 50 and the discharge of the cleaning liquid nozzle 30 are synchronized, and the cleaning liquid nozzle 30 can reliably eject the cleaning liquid.

After the first electromagnetic valve 43 and the second electromagnetic valve 44 are turned off (OFF), the CPU 9a starts counting the built-in timing T2 (S10). The CPU 9a determines whether or not the count of the built-in timer T2 has reached a predetermined time (for example, 5 seconds) (S11). The timing of the built-in timer T2 is when the predetermined time has elapsed (S11: Yes), and the CPU 9a turns on the second electromagnetic valve 44 to complete the cleaning operation. The pressure discharge valve 38 is closed to close the storage portion 50. The cleaning liquid does not flow into the storage portion 50. The storage unit 50 maintains the storage state of the cleaning liquid until the next washing operation. The CPU 9a may turn the second electromagnetic valve 44 ON depending on the detection result of the liquid level sensor 36. The storage portion 50 can reliably store a predetermined amount of the cleaning liquid.

[Embodiment 2]

The tool cleaning device of the second embodiment will be described with reference to Figs. 10 and 11 . In the tool cleaning device of the second embodiment, the storage portion 50 is installed in the middle of the cleaning liquid pipe 32. The cleaning liquid pipe 32 includes an opening and closing valve 52 disposed between the filter 33 and the storage unit 50. The on-off valve 52 is normally closed. The opening and closing valve 52 in the closed position is a reverse flow of the washing liquid that has stopped in the cleaning liquid pipe 32 toward the first cooling liquid pipe 31.

The opening and closing valve 52 is switched to the open position by the action of the air pressure supplied from the air passage 41. The opening and closing valve 52 that is in the open position allows the flow of the washing liquid toward the storage unit 50. The air passage 41 is provided with a fourth electromagnetic valve 57 in the middle thereof. The fourth electromagnetic valve 57 is normally closed. In the fourth electromagnetic valve 57, the residual air is silenced by the muffler 57a in the air path 41, and then released. The fourth electromagnetic valve 57 is switched to the open position in accordance with the opening command given by the control unit 9.

The storage portion 50 is provided with a pressure discharge passage 37 connected to the upper portion. The pressure discharge passage 37 has a pressure passage. The pressure discharge passage 37 is a third electromagnetic valve 55 having its middle. The third electromagnetic valve 55 is located at the pressure discharge position in a normal state. The pressure discharge passage 37 discharges the pressure inside the storage portion 50 toward the processing chamber. The third electromagnetic valve 55 is switched to the pressurizing position by an operation command given by the control unit 9. The pressure discharge passage 37 is a pressure passage that is connected to the air pressure source 39 through the air passage 42. The air supplied from the air pressure source 39 pressurizes the inside of the storage unit 50.

The storage unit 50 is provided with a buoy type liquid level sensor 53 and a pressure switch 54. The buoy type liquid level sensor 53 has a sensor main body 53a and two proximity switches (a first proximity switch 53b and a second proximity switch 53c). The sensor body 53a moves in the vertical direction as the liquid level in the storage portion 50 rises and falls. The proximity switches 53b and 53c are turned ON when the sensor body 53a approaches. The proximity switches 53b and 53c are disposed apart from each other in the vertical direction. The control unit 9 recognizes that the liquid level in the storage unit 50 is in the high position by the proximity switch 53b being turned ON. The control unit 9 is turned on (ON) by the proximity switch 53c to recognize that the liquid level in the storage unit 50 is at a low position.

The pressure switch 54 outputs an ON signal to the control unit 9 when the pressure in the reservoir 50 is equal to or higher than a predetermined pressure. The control unit 9 recognizes that the inside of the storage unit 50 is in a pressurized state by the ON of the pressure switch 54.

In the tool cleaning device of the second embodiment, the tool 20 and the tool holder 21 are cleaned by the following procedure (refer to FIG. 11). S21 to S23 in Fig. 11 are the same as S1 to S3 in the first embodiment. When the air pressure is abnormal (S22: No), the CPU 9a turns off the first electromagnetic valve 43, the third electromagnetic valve 55, and the fourth electromagnetic valve 57 (S37), and does not perform the washing operation.

When the air pressure is normal (S22: Yes), the CPU 9a determines the driving state of the first pump 13 (S23). When the first pump 13 is in the non-driving state (S23: No), the CPU 9a does not perform the washing operation.

When the first pump 13 is in the driving state (S23: Yes), the CPU 9a determines whether or not the tool exchange command is present (S24). In the case of no tool exchange command (S24: No), the CPU 9a does not perform the cleaning operation. When there is a tool exchange command (S24: Yes), the CPU 9a turns on the first electromagnetic valve 43 and the third electromagnetic valve 55, and permits the tool exchange operation (S25). The third electromagnetic valve 55 is in a pressurized position and pressurizes the inside of the storage unit 50. The liquid supply valve 35 is opened at the same time. The retentate in the storage unit 50 is ejected from the cleaning liquid nozzle 30 through the liquid supply valve 35.

The pressurization in the storage unit 50 pushes out the retentate in the storage unit 50. The cleaning liquid is ejected from the cleaning liquid nozzle 30. The cleaning liquid nozzle 30 ejects the cleaning liquid until the storage liquid in the storage unit 50 is reduced or the tool exchange is completed. The tool 20 and the tool holder 21 can be satisfactorily cleaned by a sufficient amount of the cleaning liquid which is ejected from the cleaning liquid nozzle 30.

The CPU 9a determines whether the pressure switch 54 is turned "ON" or "OFF" (S26). When the pressure switch 54 is turned "ON" (S26: Yes), the CPU 9a determines that the second proximity switch 53c is turned "ON" or "OFF" (S27). When the second proximity switch 53c is OFF (S27: No), the CPU 9a determines whether or not the tool exchange is completed (S31). In the case of the tool exchange (S31: No), the CPU 9a shifts the processing to S26.

When the second proximity switch 53c is turned "ON" (S27: Yes) or the tool exchange is completed (S31: Yes), the CPU 9a turns off the first electromagnetic valve 43 and the third electromagnetic valve 55 (OFF) Then, the fourth electromagnetic valve 57 is turned on (S28). The liquid supply valve 35 is closed. The cleaning liquid nozzle 30 stops the ejection of the cleaning liquid. The cleaning of the tool 20 and the tool holder 21 is such that the amount of the retentate in the storage unit 50 is insufficient or the tool exchange is completed. The third electromagnetic valve 55 is in a pressure-receiving position, and the opening and closing valve 52 is opened. The storage unit 50 stores the cleaning liquid in the cleaning liquid pipe 32. The liquid level of the retentate in the storage unit 50 is raised.

The CPU 9a determines whether the first proximity switch 53b is turned "ON" or "OFF" (S29). In the CPU 9a, the first electromagnetic valve 43 and the third electromagnetic valve 55 are turned off (OFF) and the fourth electromagnetic valve 57 is turned on (ON) until the first proximity switch is turned on (S29: Yes). Continue until now. The storage unit 50 stores the cleaning liquid until the liquid level in the storage unit 50 is at a high position. The liquid level in the storage unit 50 is at a high position, and the CPU 9a turns on the third electromagnetic valve 55 and turns off the fourth electromagnetic valve 57 (S30). The third electromagnetic valve 55 is in a pressurized position. The liquid supply valve 35 and the opening and closing valve 52 are closed. The air in the air passage 42 enters the storage portion 50 through the third electromagnetic valve 55, and pressurizes the retentate in the storage portion 50.

The CPU 9a waits for the storage liquid in the storage unit 50 to be pressurized until the next washing operation. In S25, the inside of the storage portion 50 is in a pressurized state. The cleaning liquid nozzle 30 ejects the cleaning liquid from the beginning and the subsequent force. The tool 20 and the tool holder 21 can be reliably washed with high responsiveness.

When the pressure switch 54 is OFF (S26: No), the CPU 9a turns off the first electromagnetic valve 43 and the fourth electromagnetic valve 57 (S32), and does not perform the cleaning operation. The CPU 9a moves the processing toward S26. The third electromagnetic valve 55 pressurizes the inside of the storage unit 50 at a position where the pressure is continued. When the internal pressure of the reservoir portion 50 reaches the predetermined pressure, the CPU 9a moves the process toward S27.

[Example 3]

The tool cleaning device of the third embodiment will be described with reference to Figs. 12 to 14 . The tool cleaning device of the third embodiment shown in Fig. 12 includes two storage portions (a first storage portion 50a and a second storage portion 50b). The cleaning liquid pipe 32 is divided into two branch pipes (the first branch pipe 32a and the second branch pipe 32b). The first storage portion 50a is connected to the first branch pipe 32a. The second storage portion 50b is connected to the second branch pipe 32b.

The first branch pipe 32a is provided with a first opening and closing valve 52 on the upstream side of the first storage portion 50a. The second branch pipe 32b is provided with a second opening and closing valve 62 on the upstream side of the second storage portion 50b. The first opening/closing valve 52 and the second opening/closing valve 62 are normally closed. The first opening and closing valve 52 and the second opening and closing valve 62 in the closed position prohibit the reverse flow of the washing liquid toward the first cooling liquid pipe 31.

The first opening/closing valve 52 and the second opening/closing valve 62 are switched to the open position in accordance with an opening command given by the control unit 9. The first opening and closing valve 52 that is in the open position is a flow that allows the washing liquid toward the first storage portion 50a. The second opening and closing valve 62 that is in the open position allows the flow of the washing liquid toward the second storage portion 50b.

The first storage portion 50a is provided with a first discharge passage 37a connected to the upper portion. The second storage portion 50b is provided with a second discharge passage 37b connected to the upper portion. The first pressure discharge passage 37a and the second pressure discharge passage 37b have a pressure passage.

The first discharge passage 37a has a third electromagnetic valve 55 in the middle thereof. The second discharge passage 37b has a fifth electromagnetic valve 66 in the middle thereof. The third electromagnetic valve 55 and the fifth electromagnetic valve 66 are located at the pressure discharge position in a normal state. When the third electromagnetic valve 55 is at the pressure discharge position, the first pressure discharge passage 37a discharges the pressure inside the first storage portion 50a toward the processing chamber. When the fifth electromagnetic valve 66 is at the pressure discharge position, the second pressure discharge passage 37b discharges the pressure inside the second storage portion 50b toward the processing chamber.

The third electromagnetic valve 55 and the fifth electromagnetic valve 66 are switched to the pressurizing position in accordance with the switching command given by the control unit 9. At this time, the first pressure discharge passage 37a and the second pressure discharge passage 37b are pressure passages that are connected to the air pressure source 39 through the air passage 60. The air pressure of the air pressure source 39 is to pressurize the inside of the storage unit 50.

The first storage unit 50a includes a first liquid level sensor 59 and a first pressure switch 54a. The second storage unit 50b includes a second liquid level sensor 65 and a second pressure switch 54b. The first liquid level sensor 59 and the second liquid level sensor 65 are the same as the buoy type liquid level sensor 53 of the second embodiment. The first liquid level sensor 59 detects whether the liquid level in the first storage portion 50a is a high position or a low position. The second liquid level sensor 65 detects whether the liquid level in the second storage portion 50b is a high position or a low position. The first pressure switch 54a detects whether or not the first storage portion 50a is in a pressurized state. The second pressure switch 54b detects whether or not the second storage portion 50b is in a pressurized state.

The first switching valve 58 is disposed between the first storage portion 50a and the liquid supply valve 35. A second switching valve 64 is disposed between the second storage portion 50b and the liquid supply valve 35. The first switching valve 58 and the second switching valve 64 are normally closed. The first switching valve 58 in the closed position stops the flow of the cleaning liquid from the first storage unit 50a. The second switching valve 58 in the closed position stops the flow of the cleaning liquid from the second storage portion 50b.

The first switching valve 58 and the second switching valve 64 are switched to the open position in accordance with an opening command of the control unit 9. The first switching valve 58 that is in the open position sends the cleaning liquid in the first storage unit 50a to the liquid supply valve 35. The second switching valve 64 that is in the open position sends the cleaning liquid in the second storage portion 50b to the liquid supply valve 35. The cleaning liquid is ejected from the cleaning liquid nozzle 30 by the liquid supply valve 35 being opened. The liquid supply valve 35 is opened in accordance with an opening command of the control unit 9.

In the tool cleaning device of the third embodiment, the tool 20 and the tool holder 21 are cleaned by the following procedures (shown in Figs. 13 and 14). Fig. 13 is a view showing the processing when the power is supplied to the working machine 1. The CPU 9a of the control device 9 reads various signals (S41). The CPU 9a waits until the work machine 1 is started (S42). When the work machine 1 is started (S42: Yes), the CPU 9a turns on the first on-off valve 52 and the second on-off valve 62 (S43). The first opening and closing valve 52 and the second opening and closing valve 62 are brought into an open position.

The CPU 9a drives the first pump 13 (S44). The cleaning liquid flows into the first storage portion 50a and the second storage portion 50b. The CPU 9a determines whether or not the liquid level in the first storage portion 50a and the second storage portion 50b is at a high position (S45). The CPU 9a opens the first opening and closing valve 52 and the second opening and closing valve 62 until the liquid level is at the high position (S45: Yes). The cleaning liquid flows into the first storage portion 50a and the second storage portion 50b via the first opening and closing valve 52 and the second opening and closing valve 62. The first storage portion 50a and the second storage portion 50b store the cleaning liquid.

When the liquid level in the first storage unit 50a and the second storage unit 50b is at a high position (S45: Yes), the CPU 9a turns off the first opening/closing valve 52 and the second opening/closing valve 62 (OFF). The third electromagnetic valve 55 and the fifth electromagnetic valve 66 are turned "ON" (S46). The first opening and closing valve 52 and the second opening and closing valve 62 are in a closed position. The third electromagnetic valve 55 and the fifth electromagnetic valve 66 are in a pressurized position. The air pressure of the air pressure source 39 pressurizes the retentate in the storage unit 50. The CPU 9a determines whether the first pressure switch 54a and the second pressure switch 54b are turned "ON" or "OFF" (S47). The CPU 9a is ready to be cleaned by the first pressure switch 54a and the second pressure switch 54b being turned "ON". The first storage portion 50a and the second storage portion 50b store the cleaning liquid until the high position is reached. The first storage portion 50a and the second storage portion 50b pressurize the storage liquid by a predetermined pressure. In the machine tool 1, the cleaning liquid in the first storage portion 50a and the second storage portion 50b is in a high position and is pressurized by a predetermined pressure (initial state).

Next, the procedure after the initial state will be described with reference to Fig. 14. The CPU 9a reads various signals (S51). The CPU 9a determines whether or not the air pressure in the air passage 60 is normal (S52). The CPU 9a determines the driving state of the first pump 13 (S53). When the air pressure is abnormal (S52: No), the CPU 9a does not perform the washing operation. When the first pump 13 is in the non-driving state (S53: No), the CPU 9a does not perform the washing operation.

When the air pressure is normal (S52: Yes) and the first pump 13 is in the driving state (S53: Yes), the CPU 9a determines whether or not the tool exchange command is present (S54). In the case of a tool exchange command (S54: Yes), the CPU 9a starts the cleaning operation.

The CPU 9a determines whether or not the first level sensor 59 is detected to be in a low position (S55). When the first liquid level sensor 59 does not detect the low position (S55: No), the CPU 9a performs washing using the washing liquid in the first storage portion 50a.

The CPU 9a turns on the first switching valve 58 and turns off the second switching valve 64, thereby permitting the tool exchange operation (S56). The first switching valve 58 is in an open position. The second switching valve 64 is in a closed position. The CPU 9a determines whether or not there is a first discharge (S57). In the case of the first discharge (S57: Yes), the CPU 9a turns ON the discharge flag (S66). The CPU 9a shifts the process to S60 and turns the liquid supply valve 35 ON. The liquid supply valve 35 is in an open position. The cleaning liquid nozzle 30 discharges the cleaning liquid in the first storage portion 50a. The first storage portion 50a is in a pressurized state. The cleaning liquid cleaning liquid nozzle 30 is a powerful force to eject the cleaning liquid.

The CPU 9a determines S57 based on the ON (ON) and OFF (OFF) states of the ejection mark. When there is no initial discharge (S57: No), the CPU 9a turns on the third electromagnetic valve 55 (ON) and turns off the fifth electromagnetic valve 66 (S58). The third electromagnetic valve 55 is in a pressurized position. The first storage portion 50a presses the inside thereof by a predetermined pressure. The fifth electromagnetic valve 66 is a pressure discharge position. The second storage portion 50b is internally pressed.

The CPU 9a turns off the first on-off valve 52 and turns on the second on-off valve 62 (S59). The first opening and closing valve 52 is in a closed position. The second on-off valve 62 is in an open position. The CPU 9a turns on the liquid supply valve 35 (S60). The liquid supply valve 35 is in an open position. The cleaning liquid nozzle 30 discharges the cleaning liquid in the first storage portion 50a. The first storage portion 50a is in a pressurized state. The cleaning liquid nozzle 30 is a powerful force to eject the cleaning liquid. The cleaning solution is to wash the tool 20 and the tool holder 21. The cleaning liquid in the cleaning liquid pipe 32 flows into the second storage portion 50b through the second branch pipe 32b. The second storage portion 50b is in a state of being discharged. The second storage portion 50b stores the inflowing cleaning liquid.

The CPU 9a determines that the tool exchange is completed (S61). In the case of tool exchange (S61: No), the CPU 9a is to continue the cleaning of the tool 20 and the tool holder 21. When the tool exchange is completed (S61: Yes), the CPU 9a disconnects the liquid supply valve 35 (OFF). The liquid supply valve 35 is in a closed position. The cleaning liquid nozzle 30 stops the ejection of the cleaning liquid.

The CPU 9a determines whether or not the second liquid level sensor 65 is detected as a high position (S63). The CPU 9a waits until the second liquid level sensor 65 is detected to be in the high position. When the second liquid level sensor 65 is detected to be in the high position (S63: Yes), the CPU 9a turns on the fifth electromagnetic valve 66 (ON) and turns off the second opening/closing valve 62 (S64). . The fifth electromagnetic valve 66 is in a pressurized position. The second on-off valve 62 is in a closed position.

The CPU 9a determines whether the second pressure switch 54b is turned "ON" or "OFF" (S65). The CPU 9a is turned on by the second pressure switch 54b (S65: Yes), and the cleaning operation is terminated. The second storage portion 50b stores the cleaning liquid until it reaches a high position, and pressurizes the cleaning liquid up to a predetermined pressure.

When the first liquid level sensor 59 is detected to be in a low position (S55: Yes), the CPU 9a performs washing using the cleaning liquid in the second storage portion 50b.

The CPU 9a turns off the first switching valve 58 and turns on the second switching valve 64 to permit the tool exchange operation (S67). The first switching valve 58 is in a closed position. The CPU 9a turns off the third electromagnetic valve 55 (OFF) and turns on the fifth electromagnetic valve 66 (S68). The third electromagnetic valve 55 is a pressure discharge position. The first storage portion 50a is internally pressed. The fifth electromagnetic valve 66 is in a pressurized position. The second storage portion 50b pressurizes the inside thereof.

The CPU 9a turns on the first on-off valve 52 and turns off the second on-off valve 62 (S69). The first opening and closing valve 52 is in an open position. The second on-off valve 62 is in a closed position. The CPU 9a turns on the liquid supply valve 35 (S70). The liquid supply valve 35 is in an open position. The cleaning liquid nozzle 30 discharges the cleaning liquid in the second storage portion 50b. The second storage portion 50b is in a pressurized state. The cleaning liquid nozzle 30 is a powerful force to eject the cleaning liquid. The cleaning solution is to wash the tool 20 and the tool holder 21. The cleaning liquid in the cleaning liquid pipe 32 flows into the first storage portion 50a through the first branch pipe 32a. The first storage portion 50a is in a state of being discharged. The first storage portion 50a stores the inflowing cleaning liquid.

The CPU 9a determines that the tool exchange is completed (S71). In the case of tool exchange (S71: No), the CPU 9a is to continue the cleaning of the tool 20 and the tool holder 21. When the tool exchange is completed (S71: Yes), the CPU 9a turns off the liquid supply valve 35 (OFF). The liquid supply valve 35 is in a closed position. The cleaning liquid nozzle 30 stops the ejection of the cleaning liquid.

The CPU 9a determines whether or not the first liquid level sensor 59 is detected as a high position (S73). The CPU 9a waits until the first liquid level sensor 59 is detected to be in the high position. When the first liquid level sensor 59 is detected to be in the high position (S73: Yes), the CPU 9a turns on the third electromagnetic valve 55 (ON) and turns off the first opening/closing valve 52 (S74). . The third electromagnetic valve 55 is in a pressurized position. The first opening and closing valve 52 is in a closed position.

The CPU 9a determines whether the first pressure switch 54a is turned "ON" or "OFF" (S75). The CPU 9a is turned on by the first pressure switch 54a (S75: Yes), and the cleaning operation is terminated. The first storage unit 50a stores the cleaning liquid until it reaches a high position, and pressurizes the cleaning liquid up to a predetermined pressure.

The tool cleaning device of the third embodiment includes the first storage portion 50a and the second storage portion 50b. In the cleaning liquid nozzle 30, the cleaning liquid in the first storage portion 50a is ejected in a normal state. When the cleaning liquid in the first storage portion 50a is insufficient, the cleaning liquid nozzle 30 discharges the cleaning liquid in the second storage portion 50b during which the cleaning liquid is supplied. The first storage portion 50a and the second storage portion 50b are in a pressurized state at the time of use. The cleaning liquid nozzle 30 is configured to eject the cleaning liquid force. The tool 20 and the tool holder 21 can be reliably washed with high responsiveness.

The second storage portion 50b stores the cleaning liquid during use of the first storage portion 50a. The first storage portion 50a is a standby state in which the cleaning liquid stored in the cleaning liquid is stored in the use of the second storage portion 50b. In the tool cleaning device of the third embodiment, the cleaning of the tool 20 and the tool holder 21 may be performed in a short period of time.

[Example 4]

The tool cleaning device of the fourth embodiment will be described with reference to Figs. 15 and 16 . The tool cleaning device of Example 4 was similar to the tool cleaning device of Example 1. In the following description, the same portions as those in the first embodiment are omitted.

As shown in Fig. 15, the tool cleaning device of the fourth embodiment includes a sixth electromagnetic valve 69. The pressurizing valve 45 is switched to the pressurizing position by the action of the air pressure supplied from the sixth electromagnetic valve 69. The sixth electromagnetic valve 69 is disposed in the middle of the air passage 42. The sixth solenoid valve 69 is normally closed. The sixth electromagnetic valve 69 is switched to the open position in accordance with the opening command given by the control unit 9. The air pressure source 39 is opened by the sixth electromagnetic valve 69, and the air pressure is supplied to the pressure valve 45 through the air passage 42.

The sixth solenoid valve 69 in the closed position releases the air remaining in the air passage 42 of the upstream side (pressurizing valve 45) by the muffler 69a, and then releases the air. In the first electromagnetic valve 43, only the liquid supply valve 35 is opened and closed.

In the tool cleaning device of the fourth embodiment, the third switching valve 67 is provided in the middle of the cleaning liquid pipe 32. The check valve 34 is disposed on the upstream side of the filter 33. The third switching valve 67 is disposed between the check valve 34 and the filter 33.

The third switching valve 67 is located at the first position in the normal state. The third switching valve 67 in the first position does not block the flow in the cleaning liquid pipe 32. The cleaning liquid in the cleaning liquid pipe 32 flows into the storage portion 50 through the third switching valve 67. The third switching valve 67 is connected to an air passage 71 to be described later. The third switching valve 67 is switched to the second position by the action of the air pressure supplied from the air passage 71. The third switching valve 67 in the second position blocks the flow in the cleaning liquid pipe 32. The upstream side (the side of the storage portion 50) of the cleaning liquid pipe 32 is continuous with the recovery tank 12 through the third switching valve 67.

The air passage 71 is branched in the middle of the air passage 42. The air passage 71 is connected to the seventh electromagnetic valve 72. The seventh electromagnetic valve 72 is normally closed. In the seventh electromagnetic valve 72, the air remaining in the air passage 71 is silenced by the muffler 72a, and then released. The seventh electromagnetic valve 72 is in an open position in accordance with an opening command given by the control unit 9. The seventh electromagnetic valve 72 supplies air to the air passage 71 by being in an open position. Therefore, the third switching valve 67 is switched to the second position. When the third switching valve 67 is switched to the second position, the cleaning liquid in the storage portion 50 is reversely flowed in the cleaning liquid pipe 32. The countercurrent washing liquid is returned to the recovery tank 12 through the third switching valve 67 through the filter 33.

In the tool cleaning device of the fourth embodiment, the CPU 9a of the control device 9 performs a cleaning operation by the following program (refer to FIG. 16). S81 to S83 in Fig. 16 are the same as S1 to S3 in the first embodiment. S84 of Fig. 16 is the same as S5 of the first embodiment.

The CPU 9a performs the cleaning operation on condition that the air pressure is normal (S82: Yes), the first pump 13 is in the drive state (S83: Yes), and the tool exchange command (S84: Yes) is provided.

The CPU 9a turns on the first electromagnetic valve 43, the second electromagnetic valve 44, and the sixth electromagnetic valve 69, and turns off the seventh electromagnetic valve 72, thereby permitting the tool exchange operation (S85). The liquid supply valve 35 is opened. The pressure relief valve 38 is closed, and the pressure valve 45 is opened. In the storage portion 50, the supply of the air pressure is in a pressurized state. The reservoir 50 pushes the retentate by the action of the air pressure. The cleaning liquid is ejected from the cleaning liquid nozzle 30 through the liquid supply valve 35. The cleaning liquid nozzle 30 is configured to eject the cleaning liquid force. The tool 20 and the tool holder 21 can be cleaned well.

The CPU 9a determines that the tool exchange is completed (S86). The CPU 9a is in the standby (S86: No) during the tool exchange. When the tool exchange is completed (S86: Yes), the CPU 9a turns off the first electromagnetic valve 43 (OFF) and turns on the seventh electromagnetic valve 72 (S87). The liquid supply valve 35 is closed. The third switching valve 67 is switched to the second position. The cleaning liquid in the storage unit 50 flows back in the cleaning liquid pipe 32, and returns to the recovery tank 12 via the third switching valve 67. The countercurrent cleaning solution is passed through a filter 33. In the cleaning liquid, the foreign matter removed by the filter 33 is washed and recovered in the recovery tank 12. The inside of the storage portion 50 is in a pressurized state. The cleaning liquid is a good force to reliably rinse the foreign matter through the filter 33.

The CPU 9a is the timing for starting the built-in timer T3 (S88). The CPU 9a determines whether or not the count of the built-in timer T3 has reached a predetermined time (for example, one second) (S89). When the predetermined time has elapsed (S89: Yes), the CPU 9a turns off (OFF) the electromagnetic valves (the sixth electromagnetic valve 69, the second electromagnetic valve 44, and the seventh electromagnetic valve 72) in the ON state (S90). ). The inside of the storage unit 50 is in a state of being discharged. The third switching valve 67 returns to the first position. The cleaning liquid flows into the storage portion 50 through the cleaning liquid pipe 32. The storage unit 50 stores the cleaning liquid.

The CPU 9a is the timing for starting the built-in timer T4 (S91). The CPU 9a determines whether or not the timing of the built-in timer T4 has reached a predetermined time (for example, 5 seconds) (S92). The CPU 9a turns on the second electromagnetic valve 44 to complete the cleaning operation (S93). The second electromagnetic valve 44 seals the storage portion 50 in a closed position. The storage unit 50 maintains the storage state after storing the cleaning liquid that has flowed for 5 seconds.

[Example 5]

The tool cleaning device of the fifth embodiment will be described with reference to Fig. 17. The tool cleaning device of Example 5 was similar to the tool cleaning device of Example 4. In the following description, the same portions as those in the fourth embodiment are omitted.

The storage unit 50 is provided with a pressure switch 54. The pressure switch 54 outputs an ON signal to the control unit 9 when the inside of the storage unit 50 is equal to or higher than a predetermined pressure. The control unit 9 is turned on (ON) by the pressure switch 54 to recognize that the inside of the storage unit 50 is in a pressurized state.

In the pressure valve 45, as in the first embodiment, the action of the air pressure supplied from the air passage 46 is switched to the open position. The air in the air passage 42 flows into the storage portion 50 while the pressure valve 45 is opened. The pressure in the storage portion 50 rises due to the action of the air pressure flowing through the air passage 42. The air passage 46 is branched from the middle of the air passage 40. The pressurizing valve 45 is switched to the open position simultaneously with the liquid supply valve 35.

In the tool cleaning device of the fifth embodiment, the pressure in the reservoir portion 50 is monitored by the pressure switch 54. In the tool cleaning device of the fifth embodiment, the filter 33 generated by the reverse flow of the cleaning liquid is washed, and is carried out in accordance with the pressure in the storage unit 50.

A modified form in which the embodiment described above is partially changed will be described.

[Modification 1]

As shown in Fig. 18, the reservoir portion 50 is provided with a piston 75 therein. The piston 75 is a liquid surface that floats on the storage liquid in the storage portion 50 and rises together with the liquid surface. The piston 75 is provided with a sealing portion 75a on its outer circumference. The sealing portion 75a is in a state in which the upper side and the lower side of the piston 75 are kept in a liquid-tight state.

The third electromagnetic valve 55 introduces air pressure into the storage unit 50 by being pressurized. The air pressure is to press the piston 75 to pressurize the retentate. The cleaning liquid in the storage portion 50 is not in contact with the air. The tool cleaning device according to the first modification is to prevent air from being mixed into the cleaning liquid. The piston 75 can also be pressed by mechanical force.

[Modification 2]

As shown in Fig. 19, the storage portion 50 is provided with an air bladder 76 therein. The air bag 76 is elastically deformable. The air bladder 76 is connected to the pressure discharge passage 37. In the pressure discharge passage 37, air is supplied into the air bladder 76 by the third electromagnetic valve 55 being in a pressurized position. The air bladder 76 is expanded in the storage portion 50 to pressurize the retentate. In the pressure discharge passage 37, the inside of the air bladder 76 is discharged by the third electromagnetic valve 55 being a pressure discharge position. The air bladder 76 is shrunk in the storage portion 50. The reservoir 50 can store the washing liquid.

The air pressure is supplied into the air bag 76. The cleaning liquid in the storage portion 50 is not in contact with the air. The tool cleaning device according to the second modification is to prevent air from being mixed into the cleaning liquid. It is also possible to supply a gas other than air into the air bladder 76. It is also possible to supply a liquid into the air bladder 76.

[Change 3]

As shown in Fig. 20, the reservoir portion 50 is provided with a diaphragm 78 therein. The diaphragm 78 divides the storage portion 50 in the vertical direction. The diaphragm 78 is elastically deformable. The upper portion of the reservoir portion 50 is connected to the pressure discharge passage 37. In the pressure discharge passage 37, the third electromagnetic valve 55 is brought into a pressurized position, and the air pressure is introduced into the storage portion 50. The air pressure acts on the diaphragm 78. As shown by the solid line in Fig. 20, the diaphragm 78 is bulged downward by the action of the air pressure, and the retentate in the storage portion 50 is pressurized. The pressure discharge passage 37 is configured to discharge the inside of the storage portion 50 by the third electromagnetic valve 55 being a pressure discharge position. As shown in Fig. 20, the dot lock line, the diaphragm 78 is expanded upward in the storage portion 50. The reservoir 50 can store the washing liquid.

The diaphragm 78 divides the inside of the storage portion 50 into upper and lower portions. The air pressure acts on the diaphragm 78. The cleaning liquid in the storage portion 50 is not in contact with the air. The tool cleaning device according to the modification 3 prevents air from being mixed into the cleaning liquid. A gas other than air may be supplied to the upper portion of the storage portion 50. The liquid may be supplied to the upper portion of the storage portion 50.

As apparent from the above description, the tool cleaning device of the present invention includes a storage portion in the middle of the cleaning liquid passage connecting the cleaning liquid tank and the cleaning liquid nozzle. The storage unit temporarily stores the washing liquid in the washing liquid passage. The cleaning liquid nozzle ejects the retentate of the storage portion. In the storage portion, the cleaning liquid is stored during the discharge stop of the cleaning liquid nozzle. In the cleaning liquid nozzle, a large amount of the cleaning liquid stored in the storage portion is stably ejected. The tool cleaning device of the present invention cleans the tool and the tool holder in a short time. The working machine provided with the tool cleaning device of the present invention does not cause installation failure of the tool.

1. . . Working machine

2. . . Abutment

2a. . . Discharge department

3. . . control box

4. . . body

5. . . Spindle head

6. . . Spindle

7. . . Drive mechanism

9. . . Control device

9d. . . Input interface

9e. . . Output interface

9f. . . path

10. . . Coolant assembly

11. . . Storage tank

12. . . Recovery tank

13. . . First pump

14. . . Second pump

15. . . Tool container

16. . . Chain

17. . . Tool storage unit

18. . . Tool exchange

18a. . . Exchange arm

18b. . . Holding department

19. . . Tool mounting hole

20. . . Tool holding unit

twenty one. . . Tool holder

21a. . . Spindle mounting department

21b. . . Tool holding unit

21c. . . Upper end of the cylinder

twenty two. . . Spindle cap

twenty three. . . bolt

twenty four. . . End cap

25. . . Liquid ditch

26. . . Cleaning liquid nozzle forming member

27. . . Liquid supply hole

28. . . Cleaning tube

29. . . Cleaning solution nozzle hole

30. . . Cleaning liquid nozzle

31. . . First coolant tube

32. . . Cleaning tube

32a. . . 1st branch

32b. . . 2nd branch

33. . . filter

34. . . Check valve

35. . . Feed valve

36. . . Liquid level sensor

37. . . Pressure relief path

37a. . . First row pressure passage

37b. . . Second discharge passage

38. . . Pressure relief valve

39. . . Air pressure source

40. . . Air road

41. . . Air road

42. . . Air road

43. . . 1st solenoid valve

43a. . . Muffler

44. . . 2nd solenoid valve

44a. . . Muffler

45. . . Pressurizing valve

46. . . Air road

48. . . Throttle valve

49. . . Check valve

50. . . Storage department

50a. . . First storage department

50b. . . Second storage department

52. . . First on-off valve

53. . . 2nd proximity switch

53a. . . Sensor body

53b. . . 1st proximity switch

53c. . . 2nd proximity switch

54. . . Pressure Switch

54a. . . 1st pressure switch

54b. . . Second pressure switch

55. . . 3rd solenoid valve

57. . . 4th solenoid valve

57a. . . Muffler

58. . . First switching valve

59. . . First level sensor

60. . . Air road

62. . . Second on-off valve

64. . . Second switching valve

65. . . Second level sensor

66. . . 5th solenoid valve

67. . . Third switching valve

69. . . 6th solenoid valve

69a. . . Muffler

71. . . Air road

72. . . 7th solenoid valve

72a. . . Muffler

75. . . piston

75a. . . Sealing part

76. . . Air bag

78. . . Diaphragm

82. . . Drive circuit

83. . . Drive circuit

84. . . Drive circuit

90. . . Operation department

91. . . Pressure sensor

Fig. 1 is a perspective view of a working machine including the tool cleaning device of the first embodiment.

Fig. 2 is a side view of the working machine of Fig. 1.

Figure 3 is a front view of the spindle and spindle head sections.

Figure 4 is a side view of the spindle and the spindle head portion.

Figure 5 is a plan view seen from below the main shaft and the head portion of the spindle.

Figure 6 is a cross-sectional view of the main part of the spindle and the spindle head.

Fig. 7 is a hydraulic circuit diagram of the tool cleaning device of the first embodiment.

Fig. 8 is a block diagram showing a control system of the tool cleaning device of the first embodiment.

Fig. 9 is a flow chart showing the washing control of the first embodiment.

Fig. 10 is a hydraulic circuit diagram of the tool cleaning device of the second embodiment.

Fig. 11 is a flow chart showing the washing control of the second embodiment.

Fig. 12 is a hydraulic circuit diagram of the tool cleaning device of the third embodiment.

Fig. 13 is a flow chart showing the control at the time of starting in the third embodiment.

Fig. 14 is a flow chart showing the washing control of the third embodiment.

Fig. 15 is a hydraulic circuit diagram of the tool cleaning device of the fourth embodiment.

Fig. 16 is a flow chart showing the backwash control of the fourth embodiment.

Fig. 17 is a hydraulic circuit diagram of the cleaning device of the fifth embodiment.

Fig. 18 is a view showing a pressurizing device of the first modification.

Fig. 19 is a view showing a pressurizing device of the second modification.

Fig. 20 is a view showing a pressurizing device of the third modification.

9. . . Control device

10. . . Coolant assembly

13. . . First pump

28. . . Cleaning tube

30. . . Cleaning liquid nozzle

31. . . First coolant tube

33. . . filter

34. . . Check valve

35. . . Feed valve

36. . . Liquid level sensor

37. . . Pressure relief path

38. . . Pressure relief valve

39. . . Air pressure source

40. . . Air road

41. . . Air road

42. . . Air road

43. . . 1st solenoid valve

43a. . . Muffler

44. . . 2nd solenoid valve

44a. . . Muffler

45. . . Pressurizing valve

46. . . Air road

48. . . Throttle valve

49. . . Check valve

50. . . Storage department

Claims (9)

A tool cleaning device comprising: a tank for storing a cleaning liquid; and a washing liquid nozzle for discharging the washing liquid; and connecting the washing liquid nozzle and the tank and washing the tank The cleaning liquid is supplied to the cleaning liquid passage of the cleaning liquid nozzle, and the cleaning tool that is installed before the main shaft of the working machine is washed by the cleaning liquid that is ejected from the cleaning liquid nozzle through the cleaning liquid passage. The cleaning liquid passage is provided with a storage portion for temporarily storing the cleaning liquid flowing in the cleaning liquid passage and between the storage portion and the cleaning liquid nozzle. The cleaning liquid passage includes a liquid supply valve that opens and closes the cleaning liquid passage, a pressure passage and a pressure discharge passage that are connected to the storage portion, a pressure valve that opens and closes the pressure passage, and the row A pressure relief valve that opens and closes the pressure passage. The tool cleaning device according to claim 1, further comprising: a control device for controlling opening and closing of the liquid supply valve, the pressure valve, and the pressure discharge valve, wherein the control device performs: the liquid supply valve and the pressure valve a cleaning operation for supplying the cleaning liquid to the cleaning liquid nozzle while the pressure regulating valve is closed; and closing the liquid supply valve and the pressure valve, and opening the pressure discharge valve The storage operation of storing the cleaning liquid in the storage unit; and the standby operation in which the liquid supply valve, the pressure valve, and the pressure relief valve are closed. The tool cleaning device according to claim 1, wherein the control device for opening and closing the liquid supply valve, the pressure valve, and the pressure relief valve is provided The control device performs a cleaning operation of supplying the cleaning liquid to the cleaning liquid nozzle by opening the liquid supply valve and the pressure valve, and closing the pressure discharge valve; and applying the liquid supply a valve and a pressure valve are closed, and a storage operation for storing the cleaning liquid in the storage portion when the pressure relief valve is opened; and the liquid supply valve and the pressure discharge valve are closed, and the pressure valve is closed It is a standby operation that is on standby mode. The tool cleaning device according to claim 2, further comprising a liquid amount sensor for detecting a liquid amount in the storage portion, wherein the control device reaches a liquid amount of the liquid amount sensor The storage operation is performed until the predetermined amount is reached. The tool cleaning device according to any one of claims 1 to 3, further comprising a check valve disposed on the cleaning liquid passage between the drum and the storage portion, stopping from the foregoing The storage portion faces the flow of the washing liquid in the tank. The tool cleaning device according to any one of claims 1 to 3, further comprising an opening and closing valve disposed on the cleaning liquid passage between the tank and the storage portion, and cleaning the tool The liquid passage opens and closes. The tool cleaning device according to claim 6, wherein the opening and closing valve has a switching position for discharging the cleaning liquid, and includes filtering on the cleaning liquid passage disposed between the opening and closing valve and the storage portion. In the standby operation, the control device performs a filter cleaning operation in which the opening and closing valve is located at the switching position, and the cleaning liquid in the storage portion is reversely flowed to the filter, and the filter is applied to the filter. Wash. For example, the tool cleaning device of any one of the patent scopes 1 to 3 In the first storage portion and the second storage portion, the first storage portion and the second storage portion are arranged in the first storage portion or the second storage portion when the cleaning liquid is supplied to the cleaning liquid nozzle. When the amount of liquid is less than or equal to the predetermined amount, the flow path to the cleaning liquid nozzle can be switched to the second storage portion or the first storage portion that is in standby with the supply of the cleaning liquid. The tool cleaning device according to any one of claims 1 to 3, wherein the cleaning liquid nozzle is disposed at a tip end portion of a spindle head that supports the spindle.