JP2015100859A - Tool cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool cleaning device which can prevent leakage of a cleaning liquid contained in exhaust.SOLUTION: A tool cleaning device includes: a tank for storing a cleaning liquid; a cleaning nozzle for jetting the cleaning liquid to a tool; a cleaning liquid passage which connects the cleaning nozzle and the tank, and supplies the cleaning liquid in the tank to the cleaning nozzle; a storage tank which is arranged on the cleaning liquid passage, and stores the cleaning liquid before flowing inside the cleaning liquid passage; a pressurization path which connects the storage tank to an air pressure source, and pressurizes an inside of the storage tank by an air pressure of the air pressure source; an exhaust path 37 which connects the storage tank to the tank, and exhausts air in the storage tank to the tank; and a pressure-reduced tank 53 which is arranged on the exhaust path 37. A filter part 51 for filtering the air is arranged in the pressure-reduced tank 53.

Description

  The present invention relates to a tool cleaning device for cleaning a tool attached to a spindle of a machine tool.

  Machine tools perform many types of machining by automatically changing tools. The machine tool includes a tool storage unit and a tool changer. The tool storage unit stores a plurality of types of tools while being held in the tool holder, and sends out necessary tools to the replacement position. The tool changer receives the tool at the change position, conveys it, and attaches it to the spindle of the machine tool. The tool changer removes the used tool from the spindle, conveys it to the change position, and returns it to the tool storage unit.

  The tool holder includes a spindle mounting part and a tool holding part. The main shaft mounting portion has a conical shape. The tool holding unit holds tools such as a drill and a tap. The spindle has a tool mounting hole. The tool mounting hole is a conical hole corresponding to the spindle mounting portion. The spindle is provided with a pulling rod at the back of the tool mounting hole. The tool changer fits the spindle mounting portion of the tool holder into the tool mounting hole. The pulling rod grips and lifts the end of the main shaft mounting portion, and fixes the tool holder to the main shaft. The spindle mounting part closely contacts the tool mounting hole to position the spindle and the tool concentrically.

  The main shaft is located inside the machining chamber. Chips generated by the processing are present inside the processing chamber. Chips may adhere to the tool holder before being attached to the spindle. The adhering chips enter between the spindle mounting part and the tool mounting hole. The tool cannot be positioned correctly with respect to the spindle due to the influence of chips. The tool rotates in an eccentric state, and machining accuracy decreases. The tool cannot be mounted on the spindle if the amount of chips attached is large. The operator needs to stop the machining and remove the chips.

  The machine tool described in Patent Document 1 includes a tool cleaning device. The tool cleaning device cleans the tool and the tool holder before attaching to the spindle. The tool cleaning apparatus includes a cleaning nozzle that ejects cleaning liquid to the tip of the main shaft. The cleaning nozzle is connected to a cleaning liquid supply source and an air pressure source via a storage tank that stores the cleaning liquid. The cleaning liquid also serves as a cooling liquid for cooling the tool being processed and the workpiece.

  The cleaning liquid supply source includes a tank that stores the cleaning liquid and a pump that delivers the cleaning liquid. The pump is connected to the storage tank. The pump sends the cleaning liquid in the tank to the storage tank. An air pressure source sends air to the reservoir. The cleaning liquid in the storage tank is ejected from the cleaning water nozzle at a high speed by the action of air. The cleaning liquid strikes the tool and the tool holder vigorously to wash away the chips.

  When supplying the cleaning liquid from the tank to the storage tank, it is necessary to reduce the air pressure of the storage tank. Therefore, the storage tank and the tank are connected by an exhaust path, and a decompression tank is provided in the exhaust path. The decompression tank is provided with a plurality of plates that hinder the movement of the exhaust. Air moves from the storage tank to the exhaust path and the decompression tank, and the pressure of the air is reduced by the plate. The reduced pressure air enters the tank.

JP 2011-83874 A

  When air is discharged from the storage tank to the tank, mist and liquid cleaning liquid are mixed in the exhaust. The mist-like cleaning liquid is easy to diffuse and may leak out of the tank.

  This invention is made | formed in view of the situation which concerns, and it aims at providing the tool washing | cleaning apparatus which can prevent the leakage of the washing | cleaning liquid contained in exhaust_gas | exhaustion.

  A tool cleaning apparatus according to the present invention includes a tank that stores a cleaning liquid, a cleaning nozzle that jets the cleaning liquid to a tool, a cleaning liquid passage that connects the cleaning nozzle and the tank and supplies the cleaning liquid in the tank to the cleaning nozzle. A storage tank for storing the cleaning liquid flowing in the cleaning liquid passage, and connecting the storage tank to an air pressure source. A tool comprising a pressurizing passage for pressurizing the storage tank, the storage tank connected to the tank, a discharge path for discharging the air in the storage tank to the tank, and a decompression tank disposed in the discharge path The cleaning apparatus is characterized in that a filtration unit for filtering air is provided in the decompression tank.

  In this invention, the air which passes the inside of a pressure-reduction tank is filtered by the filtration part, and the mist-like and liquid washing | cleaning liquid contained in air are capture | acquired by the filtration part.

  The tool cleaning apparatus according to the present invention is characterized in that the filter section is made of steel wool or sponge.

  In the present invention, steel wool or spongy body is less likely to be clogged than a general filter that captures mist-like substances, and maintains air permeability even after mist-like and liquid cleaning liquid is captured. Can do. The filter is easily clogged when it captures the liquid cleaning solution.

  The tool cleaning apparatus according to the present invention is characterized in that an opening for discharging air is provided in the decompression tank, and a lid having a plurality of holes is provided in the opening.

  In this invention, a filtration part is arrange | positioned in a pressure-reduction tank through opening, and an opening is closed with a lid | cover. Therefore, the filtration part does not fall from the opening. Further, since the lid is provided with a plurality of holes, air is smoothly discharged.

  In the present invention, the exhaust gas passing through the vacuum tank is filtered by the filtration unit, and the mist and liquid cleaning liquid contained in the exhaust gas are captured by the filtration unit. It is possible to prevent leakage.

It is a perspective view of a machine tool provided with a tool washing device concerning an embodiment. 1 is a side view schematically showing a machine tool. FIG. 3 is a front view schematically showing a configuration near a spindle and a spindle head. FIG. 3 is a side view schematically showing a configuration near a spindle and a spindle head. It is the figure which looked at the structure of the spindle and the vicinity of the spindle head from below. It is principal part sectional drawing of the structure of a spindle and spindle head vicinity. It is a hydraulic circuit diagram of a tool washing device. It is a top view which shows a cooling fluid unit roughly. It is sectional drawing which made the IX-IX line in FIG. 8 the cutting line. It is a longitudinal cross-sectional view which shows a decompression tank schematically. It is a bottom view which shows a decompression tank schematically.

Hereinafter, the present invention will be described with reference to the drawings showing a tool cleaning device according to an embodiment.
FIG. 1 is a perspective view of a machine tool provided with a tool cleaning device, FIG. 2 is a side view schematically showing the machine tool, FIG. 3 is a front view schematically showing a configuration near a spindle and a spindle head, and FIG. 4 is a spindle and spindle head. It is a side view which outlines the composition of the neighborhood.

  As shown in FIGS. 1 to 3, the machine tool 1 includes a control box 3 and a column 4 on a base 2 supported on a floor surface. The left side of FIG. 2 is the front (front) of the machine tool 1. The operator operates the machine tool 1 from the front (front). The column 4 is a support column that stands vertically at the center in the left-right direction at the rear of the base 2. The machine tool 1 includes a machining chamber on the front side of the column 4 (left side in FIGS. 1 and 2). The processing chamber includes a processing table (not shown) that is movable in the front-rear and left-right directions. The machine tool 1 processes a workpiece on a processing table.

  The column 4 supports the spindle head 5 at the front. The spindle head 5 moves up and down along the column 4. The control box 3 is attached to the rear side of the column 4 (the right side in FIGS. 1 and 2). The control box 3 accommodates a control unit 9 (see FIG. 7) inside.

  As shown in FIG. 3, the spindle head 5 has a spindle 6 at the bottom and a drive mechanism 7 at the top. The spindle head 5 is raised and lowered by the drive of the drive mechanism 7. The main shaft 6 rotates about the vertical axis.

  The machine tool 1 includes an ATC (automatic tool changer) 8. As shown in FIGS. 3 and 4, the ATC 8 includes a tool storage portion 17 and a tool change mechanism 18. The tool storage portion 17 is provided on the right side of the spindle head 5. The tool change mechanism 18 is provided between the spindle head 5 and the tool storage unit 17.

  As shown in FIG. 4, the tool storage portion 17 includes a plurality of tool pods 15 attached to the chain 16. The tool pod 15 holds a tool holder 21 (see FIG. 6) to which the tool body 20 is attached. The tool pod 15 moves as the chain 16 circulates, and conveys the tool body 20 and the tool holder 21 to the replacement position (lower position in FIG. 4). At the replacement position, the tool pod 15 sends the tool body 20 and the tool holder 21 out of the tool storage unit 17. The tool body 20 and the tool holder 21 constitute a tool.

  FIG. 5 is a view of the configuration in the vicinity of the spindle and the spindle head as viewed from below. The tool change mechanism 18 includes an exchange arm 18a. The exchange arm 18a pivots about an axis parallel to the main shaft 6 and moves up and down. The exchange arm 18a has grips 18b at both ends. The gripping portion 18b moves to the lower position of the main shaft 6 and the replacement position of the tool storage portion 17 as the replacement arm 18a turns. The gripping portion 18b grips the tool holder 21 at the replacement position. The other gripping portion 18 b grips the tool holder 21 at a position below the main shaft 6.

  The exchange arm 18 a is lowered while holding the tool holder 21, and removes the tool body 20 and the tool holder 21 from the tool pod 15 and the main shaft 6. The exchange arm 18a turns 180 ° after being lowered. The tool body 20 and the tool holder 21 move from the replacement position to the lower position of the main shaft 6 or from the lower position of the main shaft 6 to the replacement position. The exchange arm 18a rises after turning, and the tool body 20 and the tool holder 21 are fitted into the main shaft 6 or the tool pod 15.

  FIG. 6 is a cross-sectional view of the main part of the configuration in the vicinity of the spindle and the spindle head. The tool holder 21 includes a spindle mounting portion 21a and a tool holding portion 21b. The tool holding portion 21b has two cylindrical portions having different diameters. The lower cylindrical portion grips the tool body 20. The diameter of the upper cylindrical part is larger than the diameter of the lower cylindrical part. The main shaft mounting portion 21a is a conical portion continuous with the upper surface of the upper cylindrical portion.

  The main shaft 6 is provided with a tool mounting hole 19 opened on the lower surface. The tool mounting hole 19 is a conical hole corresponding to the spindle mounting portion 21a. The tool holder 21 is attached to the main shaft 6 by fitting the main shaft mounting portion 21 a into the tool mounting hole 19. The tool holder 21 is positioned by bringing the spindle mounting portion 21a into close contact with the tool mounting hole 19 and bringing the upper end surface 21c of the tool holding portion 21b into close contact with the lower surface of the spindle 6.

  The spindle head 5 supports the spindle 6 in a rotatable manner. The spindle head 5 includes an annular spindle cap 22 at the lower end. The spindle cap 22 is fixed to the lower surface of the spindle head 5 with a plurality of bolts 23. The lower surface of the main shaft 6 is exposed from the center hole of the main shaft cap 22. A space between the lower surface of the main shaft 6 and the main shaft cap 22 is closed by an annular end surface cover 24. The end surface cover 24 is fixed to the lower surface of the main shaft 6 so as to contact the lower surface of the main shaft cap 22.

The tool body 20 rotates with the main shaft 6. The tool body 20 moves up and down together with the spindle head 5. The tool body 20 processes a workpiece on a processing table in the processing chamber. The workpiece moves in the front-rear direction and the left-right direction together with the processing table.
The machine tool 1 includes a tool cleaning device. The tool cleaning device cleans the tool body 20 and the tool holder 21 before attaching them to the main shaft 6. The main shaft cap 22 has an annular groove 25 on the lower surface. The annular groove 25 is formed outside the outer periphery of the end surface cover 24. The annular groove 25 is closed by an annular nozzle forming member 26 attached to the lower surface of the spindle cap 22. The nozzle forming member 26 has an annular nozzle hole 29 opened on the lower surface. The lower surface of the nozzle forming member 26 is substantially the same height as the lower end surface of the main shaft 6. The nozzle hole 29 is formed obliquely toward the center of the spindle head 5 and the spindle 6.

  The annular groove 25 continues to a liquid supply hole 27 provided in the main shaft cap 22. The liquid supply hole 27 opens to the outer periphery of the spindle cap 22. The liquid supply hole 27 is connected to the cleaning liquid hose 28. The cleaning liquid hose 28 supplies the cleaning liquid A. The cleaning liquid A enters the annular groove 25 through the liquid supply hole 27 and is ejected from the nozzle hole 29. As shown in FIG. 6, the cleaning liquid A is ejected in the direction of the nozzle hole 29 to clean the tool holder 21 and the tool body 20 located below the main shaft 6. The nozzle forming member 26 and the nozzle hole 29 constitute a cleaning nozzle 30. The annular groove 25, the liquid supply hole 27, and the cleaning liquid hose 28 constitute a part of the cleaning liquid supply path.

  As shown in FIG. 1, the machine tool 1 includes a coolant unit 10. The coolant unit 10 includes a tank 11, a recovery tank 12, a first pump 13, a second pump 14, and a decompression tank 53. The tank 11 is a box-shaped container and contains a cooling liquid (cleaning liquid A) supplied into the processing chamber. The collection tank 12, the first pump 13, the second pump 14, and the decompression tank 53 are installed on the tank 11.

  The coolant unit 10 can be attached to and detached from the rear side of the base 2. FIG. 1 shows a state where the coolant unit 10 is removed. FIG. 2 shows a state in which the coolant unit 10 is attached. The collection tank 12 can be connected to a discharge part 2a on the rear side of the base 2 (see FIG. 1). The collection tank 12 collects the used cooling liquid (cleaning liquid A) collected in the discharge part 2a. The collection tank 12 is continuous with the tank 11. The cooling liquid (cleaning liquid A) recovered in the recovery tank 12 returns to the tank 11 through a filtration device (not shown).

  The first pump 13 and the second pump 14 suck up the cooling liquid (cleaning liquid A) in the tank 11 and send it out to the processing chamber. The 1st pump 13 is a pump combined with a cooling fluid and a cleaning fluid. As shown in FIG. 7, the discharge side of the first pump 13 is connected to one end of the coolant pipe 31. The coolant pipe 31 extends into the processing chamber. The coolant is ejected from a coolant nozzle (not shown) provided at the other end of the coolant pipe 31 into the processing chamber. The cooling liquid cools the tool and workpiece being processed in the processing chamber. The discharge pressure of the first pump 13 is 0.030 to 0.045 [MPa].

  The second pump 14 is a dedicated pump for the coolant. The discharge side of the second pump 14 is connected to one end of a second coolant pipe (not shown). The second coolant pipe extends into the processing chamber. The cooling liquid is jetted into a processing chamber from a cooling liquid nozzle (not shown) provided at the other end of the second cooling liquid pipe. The cooling liquid cools the tool and workpiece being processed, and rinses away the chips generated in the processed portion. The discharge pressure of the second pump 14 is larger than the discharge pressure of the first pump 13.

  The cooling liquid pipe 31 branches to the cleaning liquid pipe 32 on the way. The cleaning liquid pipe 32 is connected to the cleaning nozzle 30 via the cleaning liquid hose 28. The cleaning liquid A is a part of the cooling liquid sent out by the first pump 13. The cleaning liquid A flows through the cleaning liquid pipe 32 and the cleaning liquid hose 28. As described above, the cleaning liquid A flowing through the cleaning liquid hose 28 is ejected from the nozzle hole 29 through the liquid supply hole 27 and the annular groove 25. The cleaning liquid A ejected from the cleaning nozzle 30 cleans the tool holder 21 and the tool body 20. As described above, the cleaning liquid A that has been cleaned collects in the discharge portion 2 a on the rear side of the base 2 and returns to the tank 11 through the recovery tank 12.

  A part of the cooling liquid pipe 31, the cleaning liquid pipe 32, the cleaning liquid hose 28, the liquid supply hole 27, and the annular groove 25 constitute a cleaning liquid passage of the tool cleaning device.

  FIG. 7 is a hydraulic circuit diagram of the tool cleaning device. The cleaning liquid pipe 32 includes a filter 33, a check valve 34 and a liquid supply valve 35. The filter 33 removes foreign matters in the cleaning liquid. The check valve 34 is arranged on the downstream side of the filter 33. The check valve 34 allows the flow toward the cleaning nozzle 30 in the cleaning liquid pipe 32 and stops the flow toward the cooling liquid pipe 31.

  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 in the closed position. The liquid supply valve 35 is connected to an air pressure source 39 through an air passage 40. The liquid supply valve 35 is switched to the open position by the action of air pressure supplied by the air passage 40. The cleaning nozzle 30 ejects the cleaning liquid A while the liquid supply valve 35 is open.

  As shown in FIG. 7, the air passage 40 includes a first electromagnetic valve 43. During normal operation, the first solenoid valve 43 is in the closed position. The air remaining in the air passage 40 is silenced by the silencer 43a and discharged. The first electromagnetic valve 43 is switched to the open position in accordance with the open command given by the control unit 9. The air pressure source 39 supplies air pressure to the liquid supply valve 35 when the first electromagnetic valve 43 is opened. When air pressure is supplied to the liquid supply valve 35, the liquid supply valve 35 is switched to the open position, and the cleaning nozzle 30 ejects the cleaning liquid A. As the air pressure source 39, equipment in a factory where the machine tool 1 is installed can be used. When there is no air pressure source 39, the liquid supply valve 35 may be an electromagnetic valve that opens and closes according to an operation command from the control unit 9.

  The cleaning liquid pipe 32 communicates with the storage tank 50. The storage tank 50 is a container capable of storing a predetermined amount of the cleaning liquid A therein, and is disposed between the check valve 34 and the liquid supply valve 35. The cleaning liquid A in the cleaning liquid pipe 32 flows into the storage tank 50 while the liquid supply valve 35 is closed. The storage tank 50 stores the cleaning liquid A. As shown in FIGS. 1 and 2, the storage tank 50 is attached to the upper rear side of the column 4.

  As shown in FIG. 7, the upper part of the storage tank 50 is connected to the decompression tank 53 via the discharge path 37. The discharge path 37 includes a discharge pressure valve 38. At normal times, the pressure relief valve 38 is in the open position. When the exhaust pressure valve 38 is in the open position, the exhaust path 37 exhausts the air in the storage tank 50 to the decompression tank 53 through the exhaust pressure valve 38. By discharging the air, the air pressure in the storage tank 50 decreases.

  The exhaust pressure valve 38 is switched to the closed position by the action of air pressure supplied by the air passage 41. The air passage 41 includes a second electromagnetic valve 44. During normal operation, the second solenoid valve 44 is in the closed position. The second electromagnetic valve 44 silences and discharges the air remaining in the air passage 41 by the silencer 44a.

  The second electromagnetic valve 44 is switched to the open position in accordance with the open command given by the control unit 9. The air pressure source 39 supplies air pressure to the exhaust pressure valve 38 through the air passage 41 when the second electromagnetic valve 44 is opened. When the air pressure is supplied to the exhaust pressure valve 38, the exhaust pressure valve 38 closes the exhaust path 37 and seals the storage tank 50.

  8 is a plan view schematically showing the coolant unit 10, FIG. 9 is a sectional view taken along line IX-IX in FIG. 8, FIG. 10 is a longitudinal sectional view schematically showing the decompression tank, and FIG. 11 is a decompression tank. FIG.

  The decompression tank 53 has a rectangular parallelepiped box shape, and is installed between the first pump 13 and the second pump 14 above the tank 11. As shown in FIG. 9, the discharge path 37 is connected to an inlet 57 that opens at the top of the decompression tank 53 via a socket 52. As shown in FIG. 10, the decompression tank 53 has a cross-sectional area sufficiently larger than the inlet 57. The air pressure in the storage tank 50 expands when flowing from the discharge passage 37 through the inlet 57 into the decompression tank 53, and the pressure and speed are reduced.

  The decompression tank 53 is fixed to the upper surface of the tank 11 with a flange 59 provided on the outer periphery. The decompression tank 53 has an outlet 58 opening in the tank 11 at the bottom 53a. As shown in FIG. 9, the outlet 58 opens at a position away from the end of the tank 11.

  A lower lid 60 is provided outside the bottom 53a. The lower lid 60 includes a connecting plate 61 that is connected to the non-opening portion of the bottom portion 53a, and a porous plate 62 having a number of holes 62a that cover the outlet 58. The connecting plate 61 and the porous plate 62 are welded. The connecting plate 61 is provided with a plurality of insertion holes (not shown) for inserting a plurality of (four in this embodiment) bolts 63. The bottom 53a is provided with a screw hole (not shown) at a position corresponding to the insertion hole. The bolt 63 is inserted into the insertion hole and screwed into the screw hole. The lower lid 60 is fixed to the bottom 53a by bolts 63.

  As shown in FIG. 10, the size (cross-sectional area) of the outlet 58 is larger than the cross-sectional area of the inlet 57. The air in the decompression tank 53 flows into the tank 11 while maintaining a low pressure and speed.

  The decompression tank 53 includes two upper and lower plates 54 and 55 therein. The upper plate 54 extends inward from the left side wall of the decompression tank 53 and faces the lower portion of the inlet 57. The lower plate 55 extends inward from the right side wall of the decompression tank 53 and faces the upper portion of the outlet 58. Steel wool 51 is provided between the plate 55 and the bottom 53a.

  The plates 54 and 55 hit the air flow in the decompression tank 53 and sufficiently reduce the air flow. The cleaning liquid A contained in the air is separated by hitting the plates 54 and 55. The separated cleaning liquid A flows along the plates 54 and 55 and the bottom 53a, and returns to the tank 11 through the outlet 58. Further, the steel wool 51 captures the mist and liquid cleaning liquid A contained in the air and filters the air. The steel wool 51 may be provided between the plates 54 and 55 or between the top surface portion of the decompression tank 53 and the plate 54. Further, instead of the steel wool 51, a spongy body (for example, a sponge) may be provided.

  As shown in FIG. 7, the upper portion of the storage tank 50 is connected to the air pressure source 39 via the pressurizing passage 42. The pressurizing path 42 includes a throttle valve 48, a pressurizing valve 45, and a check valve 49. The pressurizing valve 45 is connected to the air passage 46. During normal operation, the pressure valve 45 is in the closed position. The air passage 46 is branched from the air passage 40 on the downstream side of the first electromagnetic valve 43. The throttle valve 48 permits or prohibits the supply of air from the air pressure source 39. During normal operation, the throttle valve 48 selects permission to supply air. The check valve 49 stops the backflow of air from the storage tank 50.

  The air pressure source 39 supplies air pressure to the pressurizing valve 45 when the first electromagnetic valve 43 is opened. The pressurization valve 45 is switched to the open position by the action of air pressure supplied from the air passages 40 and 46, and the pressurization passage 42 is opened. The air pressure source 39 sends air pressure into the storage tank 50 to pressurize the inside of the storage tank 50. As described above, the cleaning nozzle 30 ejects the cleaning liquid A when the first electromagnetic valve 43 is opened. The cleaning nozzle 30 blows out the cleaning liquid A inside the storage tank 50 in a pressurized state vigorously.

  The storage tank 50 includes a liquid level sensor 36. The liquid level sensor 36 is attached at a predetermined height position from the bottom of the storage tank 50. The liquid level sensor 36 is turned on when the liquid level of the cleaning liquid A in the storage tank 50 reaches the mounting height. The mounting position of the liquid level sensor 36 is determined so that the amount of stored liquid in the storage tank 50 becomes the amount of the cleaning liquid A ejected by the cleaning nozzle 30 in one cleaning. The cleaning nozzle 30 ejects the cleaning liquid A for one second, for example, for 5 seconds. The storing operation for storing the cleaning liquid A in the storage tank 50 is performed with the liquid supply valve 35 and the pressurizing valve 45 being closed. The cleaning operation for supplying the cleaning liquid A to the cleaning nozzle 30 is performed by opening the liquid supply valve 35 and the pressurizing valve 45.

The control unit 9 includes a CPU, a ROM, a RAM, and the like. When the CPU operates according to the control program stored in the ROM, the control unit 9 controls the entire machining operation of the machine tool 1.
The control range of the control unit 9 includes rotation of the tool body 20, ascent and descent control, machining table movement control, ATC 8 operation control, and tool cleaning device control. FIG. 11 shows only the part related to the control of the tool cleaning device.

  The input interface is connected to the operation unit 90, the liquid level sensor 36, and the pressure sensor 91. The operation unit 90 is provided for an operator to input information necessary for creating a machining program. The machining program consists of a plurality of operation blocks and is stored in the RAM. As described above, the liquid level sensor 36 detects the amount of stored liquid in the storage tank 50. The pressure sensor 91 detects the pressure of the air sent out by the air pressure source 39. The input interface gives input information of the operation unit 90 and detection results of the liquid level sensor 36 and the pressure sensor 91 to the CPU.

  The output interface is connected to the drive circuit of the first pump 13, the drive circuit of the first electromagnetic valve 43, and the drive circuit of the second electromagnetic valve 44.

  The CPU gives an operation command to the drive circuit of the first pump 13 via the output interface to drive the first pump 13. The CPU gives an open command to the drive circuit of the first electromagnetic valve 43 through the output interface, and opens the first electromagnetic valve 43. The CPU gives an open command to the drive circuit of the second electromagnetic valve 44 via the output interface, and opens the second electromagnetic valve 44.

  When the first electromagnetic valve 43 is opened, the liquid supply valve 35 and the pressurization valve 45 are opened by the supply of air from the air pressure source 39. When the second electromagnetic valve 44 is opened, the exhaust pressure valve 38 is closed by the supply of air from the air pressure source 39. As described above, the cleaning nozzle 30 ejects the cleaning liquid A when the liquid supply valve 35 is opened. The pressure in the storage tank 50 is increased by the action of air pressure flowing through the air passage 42 when the pressurizing valve 45 is opened and the exhaust pressure valve 38 is closed, and the stored liquid in the storage tank 50 is moved into the cleaning liquid pipe 32. Extrude into. The cleaning liquid A is ejected from the cleaning nozzle 30 at a high speed, and the tool body 20 and the tool holder 21 are cleaned.

  The liquid supply valve 35 and the pressurizing valve 45 are closed by closing the first electromagnetic valve 43. The exhaust pressure valve 38 is opened by closing the second electromagnetic valve 44. The liquid supply valve 35 blocks the supply of the cleaning liquid A to the cleaning nozzle 30. The pressurization valve 45 releases the pressurization of the storage tank 50. The discharge path 37 discharges the air pressure in the storage tank 50 into the tank 11.

  In the tool cleaning apparatus according to the embodiment, the air passing through the decompression tank 53 is filtered by the steel wool 51 or the sponge-like body, and the mist-like and liquid cleaning liquid A contained in the air is the steel wool 51 or the sponge. Since it is captured by the object, it is possible to prevent the mist-like cleaning liquid A from leaking out of the tool cleaning device.

  Further, by using the steel wool 51 or the spongy body as a filtration part for filtering air, the air permeability can be maintained even after the mist-like and liquid cleaning liquid A is captured. The steel wool 51 or the spongy body is less likely to be clogged than a general filter that captures a mist-like substance. The filter that captures the mist-like substance is easily clogged when the liquid cleaning liquid A is captured, regardless of whether the mist-like linear liquid is captured. Because of the structure of the tool cleaning device, it is impossible to prevent the liquid cleaning liquid A from being mixed into the exhausted air.

  The operator places the steel wool 51 or the spongy body in the decompression tank 53 through the opening 58 and then closes the opening 58 with the lower lid 60. Therefore, the steel wool 51 or the spongy body does not fall from the opening 58. In addition, since the lower lid 60 is provided with a plurality of holes 62a, air is smoothly discharged.

  When replacing the steel wool 51 or the spongy body that has captured the cleaning liquid A, the lower lid 60 is removed, the steel wool 51 or the spongy body is removed from the opening 58, and a new steel wool 51 or spongy body is opened. Just put it in. The operator can easily perform the replacement of the steel wool 51 or the spongy body.

11 Tank 20 Tool body (tool)
21 Tool holder (tool)
25 Annular groove (cleaning fluid passage)
27 Liquid supply hole (cleaning liquid passage)
28 Cleaning fluid hose (cleaning fluid passage)
30 Cleaning nozzle 31 Coolant pipe (cleaning liquid passage)
32 Cleaning fluid pipe (cleaning fluid passage)
37 Discharge path 39 Pneumatic pressure source 42 Pressurization path 50 Storage tank 51 Steel wool 53 Depressurization tank 53a Bottom 58 Opening 60 Lower lid (lid)
61 connecting plate 62 perforated plate 62a hole A cleaning liquid

Claims (3)

A tank for storing the cleaning liquid, a cleaning nozzle for ejecting the cleaning liquid to the tool, a cleaning liquid passage for connecting the cleaning nozzle and the tank and supplying the cleaning liquid in the tank to the cleaning nozzle, and the cleaning liquid passage are provided. A storage tank for storing the cleaning liquid flowing in the cleaning liquid passage, a pressure path for connecting the storage tank to an air pressure source, and pressurizing the inside of the storage tank by air pressure of the air pressure source, In a tool cleaning device comprising a storage tank connected to the tank, a discharge path for discharging the air in the storage tank to the tank, and a decompression tank disposed in the discharge path.
A tool cleaning device, wherein a filtration part for filtering air is provided in the decompression tank. The tool cleaning device, wherein the filtration part is made of steel wool or sponge. An opening for exhausting air is provided in the decompression tank,
A tool cleaning device, wherein a lid having a plurality of holes is provided in the opening.

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