JP2018176308A - Cleaning device and cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device which can achieve compactification by reducing a size of a coolant tank and simplifying a structure, and to provide a cleaning method.SOLUTION: A cleaning device 1 includes: a first tank 11 which stores a coolant; multiple nozzles 30a, 30b which jet the coolant to a tool; a first filter 62 which filters the coolant in the first tank 11; a first pump 61 which sends the coolant in the first tank 11 to the first filter 62; and a storage tank 50 which stores the coolant from the first filter 62. The cleaning device 1 further includes: a second tank 110 which stores the coolant from the storage tank 50; a second pump 60 which sends the coolant from the second tank 110 to one nozzle 30a of the multiple nozzles; a first passage 81 which sends the coolant from the first filter 62 to the storage tank 50; and a second passage 82 which is connected to the first passage 81 and sends the coolant from the first filter 62 to another nozzle 30b different from the one nozzle 30a.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cleaning apparatus for cleaning a tool or a workpiece used by a machine tool for processing, and a method for cleaning a tool or a workpiece.

  A machine tool carries out various types of machining by automatically changing tools. The machine tool comprises a tool storage and a tool changer. The tool storage unit stores a plurality of types of tools in a state of being held by the tool holder, and sends out the necessary tools to the replacement position. The tool changer receives the tool at the change position, and then conveys the tool to be mounted on the spindle to the change position and mounts the tool on the spindle of the machine tool.

  The spindle is located inside the processing chamber. Chips generated by processing exist inside the processing chamber. Chips may stick to the tool holder prior to mounting on the spindle. In this case, the tool can not be positioned correctly with respect to the spindle due to the influence of chips. For example, the tool rotates in an eccentric state, and the processing accuracy decreases. The tool can not be mounted on the spindle when there is a large amount of attached chips.

  In order to solve such a problem, a machine tool is provided with a tool cleaning device which cleans a tool using a coolant (cleaning liquid). The tool cleaning device ejects the coolant to the inside and the outside of the tool at the time of machining operation and tool exchange. By this, the chips adhering to the tool are washed away.

  For example, in the cutting fluid filtration device of Patent Document 1, the used cooling fluid at the time of cutting enters the dirty tank, passes through the filtering process by the filter, and flows into the primary clean tank. The cutting fluid filtration apparatus further includes a washing pump, and sucks and reuses the cooling fluid in the primary clean tank.

Unexamined-Japanese-Patent No. 2003-275937

  However, in the cutting fluid filtration apparatus of Patent Document 1, since the cooling fluid in the primary clean tank can not be filtered sufficiently, for example, the filter for filtering the cooling fluid sucked by the cleaning pump becomes clogged immediately, or the life of the cleaning pump The problem of shortening will occur.

  In order to solve such problems, generally, a special pump is used to suck in the coolant of the dirty tank or the primary clean tank, and this is filtered with a filter with high filtration accuracy (for example, a cyclone filter), A configuration is adopted in which it is stored in another tank (for example, a super clean tank).

  However, in the above configuration, the solution is complicated by the option of tool cleaning or the cleaning solution ejection mechanism (CTS) passing through the inside of the spindle and the tool. For example, the need may arise to provide a tank for a superclean tank that is compatible with users who do not use CTS. In this case, the super clean tank may have a small capacity, and the large capacity super clean tank hinders the downsizing of the apparatus.

  Even if it is the cooling fluid which passed filter processing, since it may contain chips in many cases, it is not desirable to use for tool cleaning as it is. In general, a filter is disposed between the pump and a pump for feeding the coolant, which has undergone the filtering process, to the nozzle, and the filtering process is performed again.

  In this case, in a machine tool having both the cleaning pump and the cleaning solution ejection mechanism pump, since the filters are provided on the cleaning pump and the cleaning solution ejection mechanism pump, the number of parts increases and the structure becomes complicated.

  However, the cutting fluid filtration device of Patent Document 1 mentioned above can not cope with such a problem.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a cleaning apparatus and a cleaning method for tools or workpieces that can be made compact by reducing the size of the coolant tank and simplifying the configuration. I assume.

  A cleaning apparatus according to the present invention comprises a first tank for storing used coolant, a plurality of nozzles for injecting the coolant to a tool or a work, and a first filter for filtering the coolant in the first tank. A cleaning device for cleaning a tool or a work, comprising: a first pump for feeding the coolant in the first tank to the first filter; a reservoir for storing the coolant filtered by the first filter; and the reservoir A second tank for storing a cooling liquid exceeding the capacity of the tank, a second pump for sending a cooling liquid from the second tank to one of the plurality of nozzles, and a cooling filtered by the first filter A second flow path which is connected to a first flow path which sends a liquid to the storage tank, and the first flow path, and which sends a coolant filtered by the first filter to another nozzle different from the one nozzle And.

  In the present invention, the other nozzle does not use the coolant from the reservoir or the second tank. The other nozzle uses a coolant that the first filter sends through the second flow path. Therefore, only the one nozzle uses the coolant in the second tank, and the capacity of the second tank can be reduced accordingly.

  The cleaning apparatus according to the present invention includes a second filter provided in the first flow path, and the second flow path is connected to the first flow path between the second filter and the storage tank. It is characterized by

  In the present invention, each of the one nozzle and the other nozzle uses the coolant that has been subjected to the filtering process with the first filter and the second filter. Therefore, a highly accurate coolant can be used.

  In the cleaning apparatus according to the present invention, the first filter is a cyclone filter, an inlet is connected to the first filter, and the dirty water removed by the first filter is accommodated through the inlet. The liquid storage unit, the outlet valve disposed on the discharge port side of the liquid storage unit, the instruction receiving unit for receiving an instruction to activate the first filter, and the instruction receiving unit receives the instruction In this case, the apparatus further comprises a valve control unit that opens the outlet valve for a predetermined time prior to the start of activation of the first filter.

  In the present invention, the instruction receiving unit receives an instruction to activate the first filter. In this case, the valve control unit opens the outlet valve for a predetermined time prior to the start of activation of the first filter. Therefore, since the inside of the dirty fluid container is emptied before starting, the momentum discharged from the dirty fluid container can be suppressed when the first filter is started up.

  In the cleaning apparatus according to the present invention, the first filter is a cyclone filter, and an inlet is connected to the first filter, and the contamination containing the contaminated fluid to be removed by the first filter through the inlet A liquid storage portion, a discharge port valve disposed on the discharge port side of the dirty liquid storage portion, and a valve control portion for opening the discharge port valve for a predetermined time after the first filter is stopped; And the like.

  In the present invention, the valve control unit opens the outlet valve for a predetermined time after the first filter is stopped. Therefore, since the inside of the waste fluid container is emptied before the next start of activation of the first filter, the momentum discharged from the waste fluid container can be suppressed.

  In the cleaning apparatus according to the present invention, the first filter is a cyclone filter, an inlet is connected to the first filter, and the dirty water removed by the first filter is accommodated through the inlet. A liquid storage unit, a discharge port valve disposed on the discharge port side of the liquid storage unit, and a valve control unit which opens the discharge port valve for a predetermined time when the first filter is activated; And the like.

  In the present invention, at the time of activation of the first filter, the valve control unit opens the outlet valve for a predetermined time. Therefore, while the first filter is activated and unstable, the outlet valve is kept open for a predetermined time to suppress the supply of the coolant after the filtration process.

  The cleaning apparatus according to the present invention is a third flow path which is connected between the first filter and the second filter in the first flow path and sends the coolant filtered by the first filter to the first tank. Providing a third flow passage valve disposed in the third flow passage, and a valve control unit for opening the third flow passage valve for a predetermined time after the start of activation of the first filter; It features.

  In the present invention, the valve control unit opens the third flow path valve for a predetermined time after the start of activation of the first filter. Therefore, while the first filter is activated and unstable, the third flow path valve is kept in the state of "open" for a predetermined time, and the filtered coolant is returned to the first tank.

  The cleaning method according to the present invention comprises a first tank for storing used coolant, a plurality of nozzles for spraying the coolant to a tool or a work, and a first filter for filtering the coolant in the first tank; A cleaning method comprising: cleaning a tool or a work by a cleaning device including a first pump for sending a coolant in the first tank to the first filter, wherein a storage tank stores the coolant filtered by the first filter And the second tank stores the coolant exceeding the capacity of the storage tank, and the second pump sends the coolant from the second tank to one of the plurality of nozzles, and the second pump The first nozzle jets the coolant sent by the nozzle toward the tool or the work, and the first channel sends the coolant filtered by the first filter to the storage tank, and the second channel is the first Connected to the flow path and filtered by the first filter Sent to other different nozzles and said one nozzle 却液, wherein the other nozzle coolant flowing through the second flow path, characterized in that sprayed toward the tool or workpiece.

  In the present invention, the other nozzle does not use the coolant from the reservoir or the second tank. The other nozzle cleans the tool or the workpiece using a coolant that the first filter sends through the second flow path. Therefore, only the one nozzle uses the coolant in the second tank, and the capacity of the second tank can be reduced accordingly.

  According to the present invention, it is possible to provide a cleaning device that can cope with the case where a plurality of pumps are used together while reducing the size of the coolant tank. The number of parts can be reduced and the configuration of the cleaning apparatus can be simplified. Therefore, the cleaning device can be made compact.

It is a partial perspective view of a machine tool provided with the conventional cleaning device. It is a horizontal end surface of the cooling fluid unit of the conventional washing device. FIG. 2 is a main part configuration diagram of a cleaning device according to Embodiment 1. 5 is a flowchart illustrating control of a control unit in the cleaning apparatus according to Embodiment 1. FIG. 5 is a flowchart illustrating control of a control unit in the cleaning apparatus according to Embodiment 1. FIG. FIG. 7 is a main part configuration diagram of a cleaning device according to Embodiment 2. It is a flowchart explaining control of the control part in the washing | cleaning apparatus which concerns on Embodiment 2. FIG.

Embodiment 1
FIG. 1 is a partial perspective view of a machine tool equipped with a conventional cleaning device, and FIG. 2 is a lateral end surface of a coolant unit of the conventional cleaning device.

  A machine tool 100 equipped with a conventional cleaning apparatus includes a control box 3 and a column 4 on a base 2 supported on a floor surface. The operator operates the machine tool 100 from the front (front). The column 4 is a column that vertically rises at the center in the left-right direction at the rear of the base 2. The machine tool 100 is provided with a processing chamber 40 on the front side of the column 4. The processing chamber 40 internally includes a processing table (not shown) which can be moved back and forth and left and right. The machine tool 100 processes the workpiece on the processing table.

  The column 4 supports a spindle head (not shown) at the front. The spindle head is provided with an automatic tool changer (not shown), and ascends and descends along the column 4 by the drive of the drive mechanism. The automatic tool changer comprises a tool storage and a tool change mechanism. The tool change mechanism automatically changes any one of the plurality of tools held by the tool storage unit.

  The control box 3 is mounted on the rear side of the column 4. The control box 3 accommodates a control unit (not shown) therein. The control unit controls machining operation, automatic tool replacement, and the like in the machine tool 100.

  As shown in FIG. 1, the machine tool 100 includes a coolant unit 10. The coolant unit 10 includes a tank 11, a recovery tank 12, a tip shower pump 13, a CV pump 14, and a CTS pump 60 (second pump). The tank 11 is a box-shaped container, and stores a coolant supplied into the processing chamber 40. The recovery tank 12, the tip shower pump 13, the CV pump 14 and the CTS pump 60 are disposed above the tank 11.

  The coolant unit 10 is removable on the rear side of the base 2. The recovery tank 12 recovers a used coolant (hereinafter also referred to as a cleaning liquid). The recovery tank 12 includes a primary filter 121 that primarily filters the recovered coolant. The primary filter 121 has a plate shape and has an infinite number of fine holes. The dirty tank 122 is located below the primary filter 121. The dirty tank 122 stores the coolant that has undergone the filtering process by the primary filter 121.

  The dirty tank 122 is adjacent to the tank 11. A pair of filters 123 are located between the dirty tank 122 and the tank 11 and separate them. The cleaning fluid stored in the dirty tank 122 flows into the tank 11 through the filtering process by the pair of filters 123. In the pair of filters 123, two filters face each other across a predetermined interval. Each filter 123 has a plate shape, and has an infinite number of holes smaller than the primary filter 121.

  The tip shower pump 13, the CV pump 14 and the CTS pump 60 suck up the coolant in the tank 11 and send it to the processing chamber 40. The tip shower pump 13 is a pump for cleaning. The processing chamber 40 is provided with a cleaning solution nozzle (not shown) on the inner wall, and the discharge side of the tip shower pump 13 is connected to the cleaning solution nozzle. The tip shower pump 13 sucks up the coolant in the tank 11 and jets it from the cleaning solution nozzle into the processing chamber 40. The coolant flushes the chips in the processing chamber 40 into the tank 11.

  The CV pump 14 is a pump that is used both as a coolant and a cleaning liquid. The processing chamber 40 is provided with a coolant nozzle (not shown) inside, and the discharge side of the CV pump 14 is connected to the coolant nozzle. The CV pump 14 sucks up the coolant in the tank 11 and sends it to the washing filter 141. The washing filter 141 filters the washing liquid. The storage tank 50 temporarily stores the cleaning liquid that has been subjected to the filtration process of the cleaning filter 141 and sends it to the coolant nozzle in the processing chamber 40. The coolant nozzle in the processing chamber 40 injects the cleaning liquid from the storage tank 50 onto the tool and the workpiece (work) being processed. The coolant cools the tool and workpiece during processing and flushes out chips generated during processing.

  The CTS pump 60 is a pump that is used both as a coolant and a cleaning liquid. The CTS pump 60 sucks up the coolant in the tank 11 and sends it to the processing chamber 40. The discharge side of the CTS pump 60 is connected to another coolant nozzle inside the processing chamber 40. Similar to the CV pump 14, the CTS pump 60 sucks up the coolant in the tank 11, and jets it from the coolant nozzle to a tool and a workpiece being processed. The coolant cools the tool and the workpiece being processed in the processing chamber 40. A flow path may be provided inside the tool, and the cleaning liquid may be ejected from the tip of the tool.

  In such a coolant unit 10, a plurality of pumps use the cleaning liquid of the tank 11. Because multiple pumps provide cooling and cleaning of the tool and workpiece, a large capacity tank 11 is required. However, depending on the type of processing operation, multiple pumps may not be used. When such processing operations are mainly intended, a large-capacity tank 11 is not necessary, and there is a problem that the apparatus is not made compact.

  When the cleaning solution is repeatedly used for a long time, the cleaning solution becomes dirty, and chips accumulate between the two filters of the pair of filters 123. The pair of filters 123 takes care by alternately removing the filters 123 one by one, but at this time, there is a possibility that chips between the filters 123 may be mixed in the tank 11. Therefore, it is not desirable to use the cleaning liquid in the tank 11 as it is for cleaning the tool.

  Generally, a filter is disposed between the pump and the nozzle on the discharge side, and the filtration process is performed again. For example, in the CV pump 14 of the machine tool 100, the cleaning solution is sent to the nozzle on the discharge side via the cleaning filter 141. Therefore, when using a plurality of pumps, each pump needs to be equipped with a filter, and the number of parts increases, which complicates the configuration of the device. Furthermore, since the cleaning solution containing chips is sucked up, failure is likely to occur on the pump side as well. Also in the filter which filters the washing fluid containing chips, clogging easily occurs.

  The present invention provides a cleaning device that can solve such problems. Hereinafter, the cleaning apparatus according to Embodiment 1 will be described with reference to the drawings.

  FIG. 3 is a main part configuration diagram of the cleaning apparatus according to the first embodiment. Hereinafter, the same parts as those of the above-described conventional cleaning apparatus are denoted by the same reference numerals, and the description thereof will be omitted.

  The cleaning device 1 according to the first embodiment includes a tank 11 (first tank), a second tank 110, a first pump 61, and a second pump 60. The tank 11 is the same as the tank 11 of the cleaning device 1 and may be a dirty tank 122 of the cleaning device 1. The second pump 60 is the same as the CTS pump 60 of the cleaning device 1.

The tank 11 stores used dirty cleaning fluid, and the second tank 110 stores high-precision cleaning fluid described later obtained by filtering the cleaning fluid in the tank 11.

  The cleaning apparatus 1 includes a first filter 62 that performs a filtering process on the cleaning liquid in the tank 11 temporarily. The first pump 61 sucks up the cleaning liquid in the tank 11 and sends it to the first filter 62. The second pump 60 sucks up the high precision cleaning fluid in the second tank 110 and sends it into the processing chamber 40.

  For example, the first filter 62 is a cyclone filter. The first filter 62 removes dirt such as chips in the washing solution by centrifugation. The first filter 62 sends the washing liquid filtered through the centrifugal separation process to the reservoir 50. The first filter 62 sends the waste liquid containing the waste removed by the centrifugal separation process to the waste container 63.

  The dirty fluid container 63 has, for example, a cylindrical shape, and has an inlet 631 connected to the first filter 62. The dirty fluid storage 63 receives and temporarily stores dirty fluid discharged from the first filter 62 through the inlet 631. The dirty fluid storage unit 63 discharges the dirty fluid through the discharge port 632. A bowl-shaped filter 65 is located below the dirty fluid container 63. The discharge port 632 of the dirty fluid container 63 is connected to the discharge passage 85. One end of the discharge path 85 is connected to the discharge port 632 of the dirty fluid storage 63, and the other end extends to the bowl-shaped filter 65. The other end of the discharge path 85 is opened inside the wedge-shaped filter 65. Therefore, the dirty fluid discharged from the discharge port 632 by the dirty fluid container 63 flows into the weir filter 65 via the discharge passage 85.

  The discharge passage 85 is provided with a discharge valve 64. The control unit 9 described later controls the flow of the dirty fluid from the dirty fluid container 63 to the bowl-shaped filter 65 by controlling the opening and closing of the outlet valve 64.

  The first filter 62 sends the cleaning liquid filtered through the centrifugal separation process to the reservoir 50 via the first flow path 81. One end of the first flow path 81 is connected to the first filter 62, and the other end is connected to the storage tank 50. The first flow path 81 has a second filter 66. The first flow path 81 has a check valve 67 between the second filter 66 and the storage tank 50. The second filter 66 filters the clean cleaning fluid from the first filter 62 again.

  Therefore, after the primary filtration process by the first filter 62, the cleaning liquid in the tank 11 flows through the secondary filtration process by the second filter 66 and flows into the storage tank 50. The storage tank 50 stores the cleaning liquid (high precision cleaning liquid) that has undergone the primary filtration process and the secondary filtration process.

  A second flow passage 82 is connected to the first flow passage 81. One end of the second flow path 82 is connected between the check valve 67 and the storage tank 50, and the other end is connected to the nozzle 30 b (another nozzle) in the processing chamber 40. Therefore, the nozzle 30 b jets the high-precision cleaning liquid, which has been subjected to the filtering process by the second filter 66, to the tool and the workpiece. The second flow passage 82 is provided with a second flow passage valve 69. The controller 9 controls the flow of the high-precision cleaning liquid to the nozzle 30 b by controlling the opening and closing of the second flow path valve 69.

  The storage tank 50 stores the high precision cleaning liquid. For example, when the storage tank 50 is full, the residual high-precision cleaning solution flows into the second tank 110 via the fourth flow path 83. One end of the fourth flow path 83 is connected to the storage tank 50, and the other end is open at the second tank 110. The fourth flow path 83 is provided with a fourth flow path valve 51. The controller 9 controls the flow of the high-precision cleaning liquid from the storage tank 50 to the second tank 110 by controlling the opening and closing of the fourth flow path valve 51.

  The second pump 60 sucks up the high precision cleaning fluid in the second tank 110 and sends it to the processing chamber 40 through the fifth flow path 84. One end of the fifth flow path 84 is connected to the second pump 60, and the other end is connected to the nozzle 30 a (one nozzle) in the processing chamber 40. Therefore, the nozzle 30a jets the high-precision cleaning solution sucked by the second pump 60 to the tool and the workpiece. The fifth flow passage 84 is provided with a fifth flow passage valve 68. The controller 9 controls the flow of the high-precision cleaning liquid to the nozzle 30 a by controlling the opening and closing of the fifth flow path valve 68. Hereinafter, the nozzle 30a and the nozzle 30b are also referred to as the nozzle 30 for the convenience of description.

  The cleaning apparatus 1 includes an instruction receiving unit 90 that receives an instruction to start and stop the machine from the user. The instruction receiving unit 90 is, for example, a power switch. The instruction receiving unit 90 may be a power switch of a machine tool provided with the cleaning device 1.

  The control unit 9 is a logic circuit including a read only memory (ROM), a random access memory (RAM), and the like. The control unit 9 includes, for example, a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC). The control unit 9 includes a valve control unit 91 and a cyclone control unit 92.

  The valve control unit 91 controls the fourth flow passage valve 51, the discharge port valve 64, the fifth flow passage valve 68, and the second flow passage according to whether the instruction reception unit 90 receives a start instruction or a stop instruction. Control of opening and closing of the valve 69 is performed. The cyclone control unit 92 outputs a start instruction signal to the first filter 62 or outputs a stop instruction signal according to whether the instruction receiving unit 90 receives a start instruction or a stop instruction. Specifically, the cyclone control unit 92 outputs an instruction signal for driving and stopping the first pump 61.

  As mentioned above, in the washing | cleaning apparatus 1, the two nozzles 30 inject the highly accurate washing | cleaning liquid which already passed through the primary filtration process and the secondary filtration process. Therefore, it is not necessary to dispose a filter for each nozzle 30 upstream of the nozzle 30, and the number of parts is reduced.

  The high precision cleaning solution flowing into the nozzle 30 b uses the one before the second tank 110 is stored. Therefore, it is not necessary to store the high-precision cleaning liquid for the nozzle 30b, and the second tank 110 can be miniaturized accordingly.

  Thus, since the number of parts can be reduced and the second tank 110 can be miniaturized, the cleaning apparatus 1 (machine tool) can be miniaturized.

  On the other hand, when a cyclone filter is used as the first filter 62, there is a problem that the flow rate (flow rate) of the filtered cleaning liquid is not stable at the time of startup. This is because the first filter 62 centrifuges the washing solution flowing into it, so stable filtration can not be performed until a predetermined rotational speed is reached.

  In order to cope with such a problem, generally, a method of leaving the cyclone filter in operation is adopted. However, in this case, power will be consumed wastefully, resulting in shortening of the life of the cyclone filter.

  The cleaning apparatus 1 according to the first embodiment has a configuration that can cope with such a problem.

  FIG. 4 is a flowchart illustrating control of the control unit 9 in the cleaning apparatus 1 according to the first embodiment. For convenience, a case where the user operates the instruction receiving unit 90 to start / stop the cleaning device 1 will be described as an example.

  The control unit 9 monitors the signal from the instruction receiving unit 90 to determine whether an instruction has been received from the user (step S101). When it is determined that the control unit 9 has not received an instruction from the user (step S101: NO), the same determination is repeated until an instruction is received. When determining that the instruction has been received from the user (step S101: YES), the control unit 9 determines whether the received signal is a start instruction (step S102).

  When it is determined that the signal received by the control unit 9 is an instruction for activation (step S102: YES), the valve control unit 91 sends an instruction to put the valve in the "open" state to the discharge port valve 64. In response to an instruction from the valve control unit 91, the outlet valve 64 opens the valve (step S103). At this time, the control unit 9 instructs a clock unit (not shown) to start counting.

  The control unit 9 monitors the clock unit to determine whether a predetermined time has elapsed (step S104). When it is determined that the predetermined time has not elapsed (step S104: NO), the control unit 9 repeats the above determination until the predetermined time has elapsed. When it is determined that the predetermined time has elapsed (step S104: YES), the valve control unit 91 sends an instruction to set the valve to the “close” state to the discharge port valve 64. In response to the instruction from the valve control unit 91, the outlet valve 64 closes the valve (step S105). The predetermined time is, for example, 1 to 2 seconds.

  Subsequently, the valve control unit 91 sends an instruction to put the valve in the “closed” state to the second flow passage valve 69 and sends an instruction to put the valve in the “opened” state to the fourth flow passage valve 51. In response to an instruction from the valve control unit 91, the second flow path valve 69 sets the valve to the "close" state, and the fourth flow path valve 51 sets the valve to the "open" state (step S106).

  Thereafter, the cyclone control unit 92 sends an instruction to start the first pump 61. In response to the instruction from the cyclone control unit 92, the first pump 61 is activated to start the operation of the first filter 62 (step S107).

  By the control of the respective valves, the dirty fluid container 63 is emptied before the first filter 62 is activated. Therefore, it is possible to prevent the first filter 62 from being activated and the waste fluid in the waste fluid container 63 from passing through the first filter 62 toward the storage tank 50. Furthermore, since it is not necessary to always keep the first filter 62 in operation, power consumption can be suppressed.

  When the control unit 9 determines that the received signal is not a start instruction (step S102: NO), the control unit 9 determines that it is a stop instruction. That is, while the first filter 62 is in operation, a stop instruction is received from the user.

  At this time, the cyclone control unit 92 sends a stop instruction to the first filter 62. In response to the instruction from the cyclone control unit 92, the first pump 61 driving the first filter 62 stops its operation (step S108).

  Then, the valve control unit 91 sends an instruction to the outlet valve 64 to open the valve. In response to the instruction from the valve control unit 91, the outlet valve 64 opens the valve (step S109). At this time, the control unit 9 instructs the timekeeping unit to start counting.

  The control unit 9 monitors the clock unit to determine whether a predetermined time has elapsed (step S110). If it is determined that the predetermined time has not elapsed (step S110: NO), the control unit 9 repeats the above determination until the predetermined time has elapsed. When it is determined that the predetermined time has elapsed (step S110: YES), the valve control unit 91 sends an instruction to set the valve to the “close” state to the outlet valve 64. In response to the instruction from the valve control unit 91, the outlet valve 64 closes the valve (step S111).

  As described above, the discharge port valve 64 is set to the “open” state before and after the start of the first filter 62 to discharge the dirty fluid, and the dirty fluid container 63 is emptied. Therefore, in the cleaning device 1 according to the first embodiment, since the dirty fluid is discharged from the dirty fluid container 63 by its own weight when the first filter 62 is activated, the momentum of the discharge can be suppressed.

(Modification)

  FIG. 5 is a flowchart illustrating control of the control unit 9 in the cleaning apparatus 1 according to the first embodiment. For convenience, the case where the user operates the instruction receiving unit 90 to activate the cleaning device 1 will be described as an example.

  The control unit 9 monitors the signal from the instruction receiving unit 90 to determine whether or not the start instruction has been received from the user (step S201). When the control unit 9 determines that the user has not received a start instruction (step S201: NO), the control unit 9 repeats the above determination until an instruction is received. When it is determined that the control unit 9 receives an instruction for activation from the user (step S201: YES), the valve control unit 91 instructs the valve to be in a “closed” state to the second flow valve 69 and the fourth flow valve Send to 51 In response to the instruction from the valve control unit 91, the second flow path valve 69 and the fourth flow path valve 51 put the valves in a "closed" state (step S202).

  Then, the valve control unit 91 sends an instruction to the outlet valve 64 to open the valve. In response to the instruction from the valve control unit 91, the outlet valve 64 opens the valve (step S203).

  Thereafter, the cyclone control unit 92 sends an instruction to start the first pump 61. In response to the instruction from the cyclone control unit 92, the first pump 61 is activated to start the operation of the first filter 62 (step S204). At this time, the control unit 9 instructs the timekeeping unit to start counting.

  The control unit 9 monitors the clock unit to determine whether a predetermined time has elapsed (step S205). When it is determined that the predetermined time has not elapsed (step S205: NO), the control unit 9 repeats the above determination until the predetermined time has elapsed. When it is determined that the predetermined time has elapsed (step S205: YES), the valve control unit 91 sends an instruction to set the valve to the “closed” state to the second flow path valve 69 and the discharge port valve 64. In response to the instruction from the valve control unit 91, the second flow path valve 69 and the discharge port valve 64 put the valve in the "closed" state (step S206).

  Subsequently, the valve control unit 91 sends the fourth flow path valve 51 an instruction to set the valve to the “open” state. In response to the instruction from the valve control unit 91, the fourth flow path valve 51 brings the valve into the "open" state (step S207).

  In the cleaning device 1 of the modification, after the start of activation of the first filter 62, the outlet valve 64 is set while the first filter 62 is unstable (the state in which the liquid is stored in the liquid container 63). The state of being "open" for a time is used to suppress the supply of the cleaning liquid after the filtration process. Thereafter, after the first filter 62 is stabilized (the dirty fluid in the dirty fluid container 63 is discharged), the first filter 62 starts supplying the cleaning fluid after the filtration process to the storage tank 50. Therefore, the problem described above can be solved, and it is not necessary to always keep the first filter 62 in the operating state.

Second Embodiment
FIG. 6 is a main part configuration diagram of the cleaning device 1 according to the second embodiment. Hereinafter, the same parts as those of the cleaning apparatus 1 of the first embodiment described above are denoted by the same reference numerals, and the description thereof will be omitted.

  The washing apparatus 1 according to the second embodiment includes a third flow path 86 for returning the washing liquid after the filtering process from the first filter 62 to the tank 11. The other configuration is the same as that of the first embodiment, and the description will be omitted.

  The third flow passage 86 is connected to the first flow passage 81. One end of the third flow path 86 is connected between the first filter 62 and the second filter 66, and the other end extends to the tank 11. The other end of the third flow passage 86 is opened inside the tank 11. Therefore, the washing liquid after the filtering process from the first filter 62 can flow into the tank 11 through the third flow path 86.

  The third flow path 86 is provided with a third flow path valve 70. The valve control unit 91 controls the flow of the cleaning liquid after the filtering process from the first filter 62 to the tank 11 by controlling the opening and closing of the third flow path valve 70.

  FIG. 7 is a flowchart illustrating control of the control unit 9 in the cleaning apparatus 1 according to the second embodiment. For convenience, the case where the user operates the instruction receiving unit 90 to activate the cleaning device 1 will be described as an example.

  The control unit 9 monitors the signal from the instruction receiving unit 90 to determine whether or not an activation instruction has been received from the user (step S301). If the control unit 9 determines that the instruction for activation has not been received from the user (step S301: NO), the control unit 9 repeats the above determination until the instruction is received. If it is determined that the control unit 9 receives a start instruction from the user (step S301: YES), the valve control unit 91 instructs the valve to be in a “closed” state to the second flow valve 69, the fourth flow valve 51, send to the outlet valve 64. In response to the instruction from the valve control unit 91, the second flow path valve 69, the fourth flow path valve 51, and the discharge port valve 64 set the valves in a "closed" state (step S302).

  Subsequently, the valve control unit 91 sends an instruction to make the valve “open” to the third flow path valve 70. In response to the instruction from the valve control unit 91, the third flow path valve 70 opens the valve (step S303).

  Thereafter, the cyclone control unit 92 sends a start instruction to the first pump 61, and the first filter 62 starts operation (step S304). At this time, the control unit 9 instructs the timekeeping unit to start counting.

  The control unit 9 monitors the clock unit to determine whether a predetermined time has elapsed (step S305). When it is determined that the predetermined time has not elapsed (step S305: NO), the control unit 9 repeats the above determination until the predetermined time has elapsed. When it is determined that the predetermined time has elapsed (step S305: YES), the valve control unit 91 instructs the second flow valve 69, the third flow valve 70, and the outlet valve 64 to set the valve in the “closed” state. Send to In response to the instruction from the valve control unit 91, the second flow path valve 69, the third flow path valve 70, and the discharge port valve 64 set the valves in a "closed" state (step S306).

  Subsequently, the valve control unit 91 sends the fourth flow path valve 51 an instruction to set the valve to the “open” state. In response to the instruction from the valve control unit 91, the fourth flow path valve 51 puts the valve in the "open" state (step S307).

  In the cleaning device 1 of the second embodiment, after the start of activation of the first filter 62, while the first filter 62 is unstable, the third flow path valve 70 is kept open for a predetermined time, and the cleaning liquid after the filtration process Is returned to the tank 11. Thereafter, after the flow rate of the cleaning liquid in the first filter 62 is stabilized, the first filter 62 starts supplying the cleaning liquid after the filtering process to the storage tank 50. Therefore, the problem described above can be solved, and it is not necessary to always keep the first filter 62 in the operating state.

  About the part similar to Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

1 Cleaning device 11 tank (first tank)
Reference Signs List 30a nozzle 30b nozzle 50 reservoir 60 second pump 61 first pump 62 first filter 63 dirty liquid storage 64 outlet valve 66 second filter 70 third flow valve 81 first flow 82 second flow 86 second 3 flow path 90 instruction reception unit 91 valve control unit 110 second tank 631 inlet 632 outlet

Claims (7)

The first tank for storing used coolant, a plurality of nozzles for injecting the coolant to a tool or a work, a first filter for filtering the coolant in the first tank, and the first filter (1) A cleaning apparatus for cleaning a tool or a work, comprising: a first pump for transferring a coolant in one tank;
A storage tank storing the coolant filtered by the first filter;
A second tank for storing a coolant that has exceeded the capacity of the storage tank;
A second pump for sending a coolant from the second tank to one of the plurality of nozzles;
A first flow path for sending the cooling fluid filtered by the first filter to the storage tank;
And a second flow path which is connected to the first flow path and sends the coolant filtered by the first filter to another nozzle different from the one nozzle. A second filter provided in the first flow path,
The cleaning apparatus according to claim 1, wherein the second flow path is connected to the first flow path between the second filter and the storage tank. The first filter is a cyclone filter,
An inlet connected to the first filter, and a waste liquid containing portion for containing waste liquid removed by the first filter via the inlet;
An outlet valve disposed on the outlet side of the dirty fluid container;
An instruction receiving unit that receives an instruction to activate the first filter;
And a valve control unit for opening the outlet valve for a predetermined time prior to the start of activation of the first filter when the instruction receiving unit receives the instruction. Or the washing | cleaning apparatus as described in 2. The first filter is a cyclone filter,
An inlet connected to the first filter, and a dirty liquid storage unit for containing dirty liquid to be removed by the first filter via the inlet;
An outlet valve disposed on the outlet side of the dirty fluid container;
The cleaning device according to claim 1 or 2, further comprising: a valve control unit that opens the outlet valve for a predetermined time after the first filter is stopped. The first filter is a cyclone filter,
An inlet connected to the first filter, and a waste liquid containing portion for containing waste liquid removed by the first filter via the inlet;
An outlet valve disposed on the outlet side of the dirty fluid container;
The cleaning device according to claim 1, further comprising: a valve control unit that opens the outlet valve for a predetermined time when the first filter is activated. A third flow path which is connected between the first filter and the second filter in the first flow path and sends the coolant filtered by the first filter to the first tank;
A third flow path valve disposed in the third flow path,
The cleaning device according to claim 2, further comprising: a valve control unit that opens the third flow path valve for a predetermined time after the start of activation of the first filter. A first tank for storing used coolant, a plurality of nozzles for spraying the coolant to a tool or a work, a first filter for filtering the coolant in the first tank, and the first filter for the first filter A cleaning method for cleaning a tool or a work with a cleaning apparatus comprising: a first pump for feeding a coolant in a tank
A storage tank stores the coolant filtered by the first filter;
The second tank stores the cooling fluid exceeding the capacity of the storage tank,
A second pump sends coolant from the second tank to one of the plurality of nozzles,
The one nozzle jets the coolant sent by the second pump toward the tool or the work,
The first flow path sends the coolant filtered by the first filter to the storage tank,
A second flow path is connected to the first flow path, and sends the coolant filtered by the first filter to another nozzle different from the one nozzle;
The cleaning method according to claim 1, wherein the other nozzle jets the coolant flowing in through the second flow path toward the tool or the work.

Images