Control device, machine tool, and control method

Abstract

A control device (14) for a machine tool (10) that machines an object to be machined in a machining region (48), the control device (14) being provided with a coolant supplier (32) that supplies coolant to the machining region (48), and a mist collector (34) that collects mist in the machining region (48), the control device (14) being provided with: a machining control unit (74) that controls the machine tool (10) to perform machining on the basis of a machining program (72); determining whether the processing is finished; and a collector control unit (76) that automatically stops the mist collector (34) when the machining is completed.

Description

Technical Field

[0001] The invention relates to a control device, a machine tool and a control method. Background Art

[0002] The mist collector collects the mist generated in the processing area of ​​the machine tool (refer to Japanese Patent Publication No. 2012-76006). The mist collector collects the mist in the processing area to prevent the mist from leaking out of the processing area. The mist is a particulate coolant suspended in the air. Summary of the invention

[0003] In order to reliably prevent the mist from leaking out of the processing area, the mist collector often works for a long time. However, the mist collector consumes a lot of electricity when working for a long time.

[0004] The object of the present invention is to solve the above-mentioned problems.

[0005] The first embodiment of the present invention is a control device for a machine tool, wherein the machine tool includes a coolant supplier for supplying coolant to a processing area and a mist collector for recovering mist in the processing area, wherein the machine tool processes a processing object in the processing area, and the control device includes: a processing control unit, which controls the machine tool to perform the processing based on a processing program and determines whether the processing is completed; and a collector control unit, which automatically stops the mist collector when the processing is completed.

[0006] A second aspect of the present invention is a machine tool including the control device of the first aspect.

[0007] The third aspect of the present invention is a control method, which is a control method for a computer-controlled machine tool, wherein the machine tool includes a coolant supplier for supplying coolant to a processing area and a mist collector for recovering mist in the processing area, and the machine tool processes a processing object in the processing area. The control method includes: an end determination step, wherein the computer determines whether the processing based on the processing program is completed; and a stop control step, wherein when the processing is completed, the computer controls the mist collector to automatically stop the mist collector.

[0008] According to the present invention, the power consumption of the mist collector can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of a machine tool according to an embodiment. Figure 2 is a block diagram of the control device. Figure 3 : is a flowchart showing the control method of the embodiment. Figure 4 It is a schematic diagram of a machine tool according to Modification 1. Figure 5 This is a block diagram of a control device according to Modification 2. DETAILED DESCRIPTION

[0010] [Implementation Method] Figure 1 It is a schematic diagram of the machine tool 10 according to the embodiment.

[0011] in addition, Figure 1 The X direction and the Y direction shown are directions parallel to the horizontal plane. The X direction and the Y direction are orthogonal to each other. Figure 1 The Z direction shown is a direction parallel to the gravity direction. Therefore, the Z direction is orthogonal to the X direction and the Y direction. However, Figure 1 The Z direction shown indicates the direction opposite to the direction of gravity.

[0012] The machine tool 10 includes a processing machine 12 and a control device 14 .

[0013] The processing machine 12 is a machine for processing an object using a tool 16. The processing machine 12 includes a spindle 18, a spindle head 20, a column 22, a base 24, a table 26, a table drive unit 28, a cover 30, a coolant supply device 32, and a mist collector 34.

[0014] A tool holder 36 (see Figure 1 ). The tool holder 36 can be attached and detached relative to the spindle 18. The tool holder 36 holds the tool 16. The tool 16 is, for example, a spring turning tool, a drill, an end mill, a milling cutter, etc.

[0015] The processing machine 12 further includes a tool magazine 38. The tool magazine 38 detachably holds a plurality of tools 16. One tool 16 of the plurality of tools 16 held in the tool magazine 38 is replaceably mounted on the tool holder 36.

[0016] The spindle head 20 supports the spindle 18. The spindle head 20 also includes a motor for rotating the spindle 18. The tool 16 mounted on the spindle 18 via the tool holder 36 rotates together with the spindle 18.

[0017] The column 22 supports the spindle head 20 . The column 22 includes a motor for moving the spindle head 20 in the Z direction. The column 22 is supported by a base 24 .

[0018] The pedestal 24 is installed on a setting surface. The setting surface is, for example, a floor of a factory. The setting surface may also be a supporting surface of a table installed on the floor. The setting surface extends, for example, parallel to a horizontal plane. The pedestal 24 may also have a plurality of legs 24a. Each leg 24a is, for example, a caster, a jack, or the like.

[0019] The table driving unit 28 is supported by the base 24. The table driving unit 28 includes a first sliding unit 42, a saddle 44, and a second sliding unit 46.

[0020] The first slide portion 42 is provided on the pedestal 24 . The first slide portion 42 includes, for example, a guide rail extending in the Y direction. The first slide portion 42 supports the saddle 44 .

[0021] The saddle 44 moves in the Y direction by driving a motor (not shown). The motor is controlled by the control device 14. The saddle 44 moves while being guided by the first slide portion 42. The control device 14 will be described in more detail later.

[0022] The second slide portion 46 is provided on the saddle 44. The second slide portion 46 includes, for example, a guide rail extending in the X direction.

[0023] The table 26 supports a processing object (not shown) below the spindle 18. The table 26 is supported by the second slide 46. The table 26 moves in the X direction by the drive of a motor (not shown). The motor is controlled by the control device 14. The table 26 moves while being guided by the second slide 46.

[0024] The cover 30 covers the spindle 18, the spindle head 20, the column 22, the pedestal 24, the table 26, and the table driving unit 28. Thus, the cover 30 forms a processing area 48. The processing object is processed in the processing area 48.

[0025] The cover 30 further includes a door and a window, which are not shown. The operator can carry out operations such as carrying the processing object into the processing area 48 through the door in an open state. In addition, the operator can easily check the state in the processing area 48 through the window.

[0026] The coolant supplier 32 is a device that supplies coolant to the processing area 48. The coolant supplier 32 includes a coolant tank 50, a nozzle 52, a supply pipe 54, and a pump 56.

[0027] The coolant tank 50 stores coolant and is disposed outside the processing area 48 .

[0028] The nozzle 52 is a spraying portion that sprays the coolant. The nozzle 52 is disposed in the processing area 48. In addition, the coolant supplier 32 may include a plurality of nozzles 52.

[0029] The supply pipe 54 is a pipe connecting the coolant tank 50 and the nozzle 52. The coolant supplier 32 may include a plurality of supply pipes 54. The number of supply pipes 54 is determined, for example, by the number of nozzles 52. The supply pipe 54 penetrates the cover 30 and connects the coolant tank 50 and the nozzle 52.

[0030] The pump 56 is connected to the supply pipe 54. The pump 56 draws the coolant in the coolant tank 50 and delivers it to the nozzle 52. Thus, the coolant is sprayed from the nozzle 52 into the processing area 48. In addition, the pump 56 is controlled by the control device 14.

[0031] The coolant sprayed into the processing area 48 cools the tool 16 and the object to be processed. When processing is performed in the processing area 48, mist of the coolant is generated. The mist may leak out of the processing area 48 through a small gap generated in the processing machine 12.

[0032] The mist collector 34 is a device for collecting mist in the processing area 48. The mist collector 34 is provided outside the processing area 48. In addition, the mist collector 34 is connected to the cover 30 via a duct 58. The mist collector 34 collects the mist by sucking the air in the processing area 48. Thus, the mist can be prevented from leaking out of the processing area 48.

[0033] When the tool 16 cuts the object to be processed, fine chips are generated as dust in the processing area 48. Like mist, this dust may leak out of the processing area 48 through a small gap generated in the processing machine 12. The mist collector 34 can collect not only the mist but also the dust by sucking the air in the processing area 48. This can also prevent the dust from leaking out of the processing area 48.

[0034] The mist collector 34 may be connected to the coolant tank 50. Thus, the mist collected by the mist collector 34 can be returned to the coolant tank 50 as a cooling medium.

[0035] When the mist collector 34 and the coolant tank 50 are connected, the mist collector 34 and the coolant tank 50 are preferably connected via a filter device (filter) not shown. The filter device removes impurities in the coolant sent from the mist collector 34 to the coolant tank 50. If the mist collector 34 and the coolant tank 50 are connected via the filter device, clean coolant can be returned from the mist collector 34 to the coolant tank 50. Impurities in the coolant are, for example, chips recovered together with the mist.

[0036] Figure 2 is a block diagram of the control device 14 .

[0037] The control device 14 is a computer that controls the processing machine 12. The control device 14 is, for example, a numerical control device. The control device 14 includes a display unit 60, an operation unit 62, a storage unit 64, a calculation unit 66, and a backup power supply unit 68.

[0038] The display unit 60 is a display device including a display screen 60d. The display unit 60 is, for example, a liquid crystal display device or an OEL (Organic Electro-Luminescence) display device.

[0039] The operation unit 62 is an input device for receiving instructions from the operator to the control device 14. The operation unit 62 includes, for example, an operation panel 62a, a touch panel 62b, etc. The touch panel 62b is provided on the display screen 60d. The operation unit 62 (operation panel 62a) may also include a keyboard, a mouse, etc.

[0040] The storage unit 64 may be composed of a volatile memory (not shown) and a nonvolatile memory (not shown). Examples of volatile memory include RAM (Random Access Memory). Examples of nonvolatile memory include ROM (Read Only Memory), flash memory, etc. Data, etc., may be stored in a volatile memory, for example. Programs, data tables, mappings, etc., may be stored in a nonvolatile memory, for example. At least a portion of the storage unit 64 may also be provided in a processor, an integrated circuit, etc. as described above. The storage unit 64 stores a control program 70 and a processing program 72.

[0041] The control program 70 is a program for causing the control device 14 to execute the control method of the present embodiment. A more detailed description of the control method will be given later.

[0042] The processing program 72 is a program including control commands for the processing machine 12. The processing program 72 includes, for example, a plurality of control commands for controlling the above-mentioned motors. In addition, the processing program 72 includes, for example, a plurality of control commands for controlling the coolant supplier 32. The processing program 72 is created or edited in advance by an operator.

[0043] The calculation unit 66 may be composed of a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). In other words, the calculation unit 66 may be composed of a processing circuit.

[0044] The operation unit 66 includes a processing control unit 74 and a collector control unit 76. The processing control unit 74 and the collector control unit 76 are implemented by the operation unit 66 executing the control program 70. In addition, at least a part of the processing control unit 74 and the collector control unit 76 can also be implemented by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). In addition, at least a part of the processing control unit 74 and the collector control unit 76 can also be constituted by an electronic circuit including discrete devices.

[0045] The processing control unit 74 controls the processing machine 12 according to the processing program 72, thereby processing the processing object. For example, the processing control unit 74 controls the rotation of the spindle 18, the movement of the spindle head 20, and the movement of the table 26 based on the processing program 72. However, in the processing machine 12, the collector control unit 76 controls the mist collector 34.

[0046] Furthermore, the machining control unit 74 determines whether or not coolant is used in machining by the machining machine 12 before starting cutting of the machining object. This determination is performed based on the machining program 72 or an instruction from the operator.

[0047] For example, a control command for starting the coolant supply device 32 is included in the machining program 72. In this case, the machining control unit 74 determines that the coolant is used in the machining performed by the machining machine 12. In addition, for example, even if the machining program 72 does not include a control command for starting the coolant supply device 32, there is a case where the operator instructs the control device 14 to start the coolant supply device 32. In this case, the machining control unit 74 determines that the coolant is used in the machining performed by the machining machine 12.

[0048] After machining starts, the machining control unit 74 determines whether machining based on the machining program 72 is completed. For example, when all control commands required to machine the object are executed, the machining control unit 74 determines that machining based on the machining program 72 is completed.

[0049] The collector control unit 76 determines whether to automatically start the mist collector 34 based on the result of determination as to whether the coolant is used during processing by the processing machine 12 .

[0050] For example, when the coolant is not used in the processing performed by the processing machine 12, the collector control unit 76 does not automatically start the mist collector 34. This prevents the mist collector 34 from being operated unnecessarily when mist is not generated. Therefore, the power consumption of the mist collector 34 is suppressed.

[0051] On the other hand, when coolant is used in the processing performed by the processing machine 12, the collector control unit 76 controls the mist collector 34 to automatically start the mist collector 34. As a result, the mist generated in the processing area 48 during the processing can be collected by the mist collector 34. In addition, the mist collector 34 is automatically started. Therefore, the mist is prevented from leaking out of the processing area 48 due to human error.

[0052] In addition, even if it is known that coolant is used in the processing performed by the processing machine 12, the collector control unit 76 preferably does not start the mist collector 34 before the processing starts. In other words, it is preferred that the collector control unit 76 starts the mist collector 34 in response to the start of the processing. Thereby, the mist collector 34 is prevented from consuming power before the mist is generated. In this case, for example, when the operator instructs the control device 14 to start the processing, the collector control unit 76 automatically starts the mist collector 34. The collector control unit 76 may also automatically start the mist collector 34 when the operator instructs the control device 14 to start the coolant supply device 32.

[0053] In addition, the collector control unit 76 determines whether to automatically stop the mist collector 34 based on the result of determining whether the processing based on the processing program 72 is completed. When the mist collector 34 is started and the processing based on the processing program 72 is completed, the collector control unit 76 automatically stops the mist collector 34. This prevents the mist collector 34 from over-operating due to, for example, human error after the processing is completed.

[0054] In addition, it is preferred that the collector control unit 76 stops the mist collector 34 after a predetermined time TM has passed since the end of the processing. Even after the processing is completed, the mist collection leakage can be prevented by continuing to operate the mist collector 34. The mist collector 34 automatically stops when a predetermined time TM has passed after the processing is completed, thereby suppressing the situation where the power consumption of the mist collector 34 becomes excessive.

[0055] The start time of the predetermined time TM is the time when the processing control unit 74 determines that the processing based on the processing program 72 is completed. However, the collector control unit 76 may calculate (estimate) the end time of the processing based on the processing program 72 based on the processing program 72. In this case, the collector control unit 76 may use the calculated end time as the start time of the predetermined time TM. The information indicating the predetermined time TM is set in the control device 14 by the operator, for example. However, the information indicating the predetermined time TM may also be set in the control device 14 by the manufacturer of the control device 14.

[0056] The backup power supply unit 68 is a power supply different from the main power supply of the control device 14. The backup power supply unit 68 includes, for example, a battery. The backup power supply unit 68 is built into the control device 14. However, the backup power supply unit 68 may be provided on the machine tool 10 as an external power supply of the control device 14. In addition, the main power supply of the control device 14 is omitted from the illustration.

[0057] When the main power supply of the control device 14 is disconnected during the operation of the mist collector 34, the backup power supply unit 68 supplies power to each unit of the control device 14. Thus, even after the main power supply is disconnected, the collector control unit 76 can continue to control the mist collector 34. Therefore, for example, even after the main power supply is disconnected, the collector control unit 76 can automatically stop the mist collector 34.

[0058] Figure 3 is a flowchart illustrating a control method according to an embodiment.

[0059] The control device 14 executes, for example, Figure 3 For example, when processing starts, the control device 14 executes Figure 3 In addition, at the start time of the control method, the mist collector 34 is stopped. Figure 3 The control method includes a coolant use determination step S1, a start control step S2, a processing control step S3, an end determination step S4, a collector state determination step S5, and a stop control step S6.

[0060] In the coolant use determination step S1, the processing control unit 74 determines whether the coolant is used in the processing by the processing machine 12. As described above, the processing control unit 74 determines whether the coolant is used in the processing by the processing machine 12 based on the processing program 72 or the operator's instruction.

[0061] When the coolant is used in the processing performed by the processing machine 12 (S1: Yes), the startup control step S2 is started. In the startup control step S2, the collector control unit 76 controls the mist collector 34 to automatically start the mist collector 34.

[0062] When the coolant is not used in the processing performed by the processing machine 12 ( S1 : No), the startup control step S2 is skipped.

[0063] In the processing control step S3, the processing control unit 74 controls the processing machine 12 to process the processing object. The processing control unit 74 controls the processing machine 12 according to the processing program 72. When the coolant is used in the processing control step S3, mist is generated in the processing area 48. However, the mist is collected by the mist collector 34 and does not leak out of the processing area 48.

[0064] In the end determination step S4, the processing control unit 74 determines whether the processing based on the processing program 72 is completed. If the processing is completed (S4: Yes), the collector state determination step S5 is started. If the processing is not completed (S4: No), the processing control step S3 is continued.

[0065] In the collector state determination step S5, the collector control unit 76 determines whether the mist collector 34 is operating. When the mist collector 34 is operating (S5: Yes), the stop control step S6 is started.

[0066] In the stop control step S6, the collector control unit 76 stops the mist collector 34. In the stop control step S6, the collector control unit 76 may stop the mist collector 34 immediately, but preferably stops the mist collector 34 after a predetermined time TM has elapsed from the end of processing.

[0067] The control step S6 is terminated by stopping. Figure 3 The control method ends. In addition, if the mist collector 34 does not operate (S5: "No"), the stop control step S6 is skipped. In this case, the collector state determination step S5 ends. Figure 3 The control method ends.

[0068] [Modifications] The following describes a modified example of the above embodiment. However, in the following description, the description that overlaps with the above embodiment is appropriately omitted. Unless otherwise specified, the elements described in the above embodiment are given the same reference numerals as in the above embodiment.

[0069] (Variant 1) Figure 4 This is a schematic diagram of a machine tool 101 ( 10 ) according to Modification 1.

[0070] The machine tool 101 further includes a sub-controller 78 .

[0071] The sub-controller 78 is a computer different from the control device 14. The sub-controller 78 includes, for example, a processor and a memory. The sub-controller 78 may include an integrated circuit, a discrete device, or the like.

[0072] When the control device 14 stops, the sub-control device 78 controls the mist collector 34 instead of the collector control unit 76. Therefore, even when the control device 14 stops, the mist collector 34 is controlled by the sub-control device 78 in the same manner as in the embodiment.

[0073] For example, when the processing is finished, the operator instructs the control device 14 to stop immediately. As a result, the control device 14 stops immediately after the processing is finished. However, as described above, it is preferred that the mist collector 34 recovers the mist from the end of the processing until the predetermined time TM has passed. In this case, the sub-control device 78 can control the mist collector 34 instead of the control device 14.

[0074] In addition, it is preferred that the sub-control device 78 and the control device 14 communicate appropriately and share data required for controlling the mist collector 34. For example, the sub-control device 78 and the control device 14 share various information related to the need for coolant during processing, the progress of processing, or the time after processing. As a result, the sub-control device 78 can smoothly take over the control performed by the collector control unit 76. According to this modification, even after the control device 14 stops, the control of the mist collector 34 can be continued by the sub-control device 78.

[0075] (Variant 2) Figure 5 This is a block diagram of the control device 142 (14) according to the second modification.

[0076] The control device 142 further includes an alarm output unit 80 .

[0077] The alarm output unit 80 outputs an alarm when an abnormality occurs in the machine tool 10. For example, the machine tool 10 is appropriately equipped with sensors (not shown) for detecting failures in various parts such as the spindle 18, the spindle head 20, and the table drive unit 28. The alarm output unit 80 determines whether a failure has occurred in the machine tool 10 based on the signals output by the sensors. When a failure in various parts of the machine tool 10 is detected, the alarm output unit 80 notifies the operator of the failure, for example, via the display unit 60.

[0078] When the alarm output unit 80 outputs an alarm before the start of processing, the processing control unit 74 does not start processing until the cause of the alarm is eliminated. In addition, when the alarm output unit 80 outputs an alarm after the start of processing, the processing control unit 74 interrupts the processing based on the processing program 72 until the cause of the alarm is eliminated.

[0079] When the alarm output unit 80 outputs an alarm, the collector control unit 76 prohibits the operation of the mist collector 34 until the cause of the alarm is eliminated. When the mist collector 34 is in operation at the time of the alarm output, the collector control unit 76 stops the mist collector 34 regardless of the processing program 72 and the operator's instructions.

[0080] According to this modification, it is possible to prevent mist collector 34 from operating when an abnormality occurs in machine tool 10 .

[0081] (Combination of multiple variations) The above-mentioned multiple modified examples may be appropriately combined within a range not inconsistent with each other.

[0082] [Modified embodiment] The present invention is not limited to the above-described embodiment, and various configurations may be employed without departing from the gist of the present invention.

[0083] For example, in the above-mentioned embodiment, whether to start the mist collector 34 is determined before the start of the processing based on whether the coolant is used during the processing. However, the collector control unit 76 may also decide whether to start the mist collector 34 after the start of the processing. In this case, the collector control unit 76 obtains information indicating the spraying time during the processing. The spraying time is the time when the coolant is sprayed into the processing area 48 during the processing. For example, a timer is used to obtain the information indicating the spraying time. In addition, the collector control unit 76 may also obtain information indicating the spraying amount. The spraying amount is the amount of coolant sprayed into the processing area 48 during the processing. For example, a flow sensor is used to obtain the information indicating the spraying amount.

[0084] When the ejection time or ejection amount is obtained, the collector control unit 76 determines whether to start the mist collector 34 based on the ejection time or ejection amount. For example, when the ejection time or ejection amount is a small value, even if the coolant is ejected to the processing area 48, almost no mist will be generated. Therefore, when the ejection time or ejection amount is a small value, the possibility of the mist leaking out of the processing area 48 is small. On the other hand, after the ejection time or ejection amount reaches a certain value, the possibility of the mist leaking out of the processing area 48 increases. Based on the above situation, when the ejection time or ejection amount is equal to or less than a predetermined threshold value, the collector control unit 76 prohibits the action of the mist collector 34. Thus, the mist collector 34 is prevented from consuming power unnecessarily. In addition, when the ejection time or ejection amount exceeds a predetermined threshold value, the collector control unit 76 controls the mist collector 34 so that the mist collector 34 is automatically started. Thus, the mist is prevented from leaking out of the processing area 48. The threshold value is pre-specified by the operator or the manufacturer of the machine tool 10.

[0085] When the spraying time or the spraying amount is obtained, the collector control unit 76 can change the length of the prescribed time TM according to the spraying time or the spraying amount. For example, the larger the value of the spraying time or the spraying amount is, the more mist is generated. Based on this, the collector control unit 76 can make the prescribed time TM longer as the spraying time or the spraying amount is larger. In this way, the recovery leakage of the mist can be reduced more reliably. On the other hand, the collector control unit 76 can make the prescribed time TM shorter as the spraying time or the spraying amount is smaller. In this way, the power consumption of the mist collector 34 can be suppressed. The collector control unit 76 can also use a data table storing multiple prescribed times TM according to the spraying time or the spraying amount to determine the length of the prescribed time TM.

[0086] The collector control unit 76 may also calculate (predict) the arrival time when the ejection time or ejection amount reaches the threshold value based on the processing program 72. In addition, the collector control unit 76 may calculate the arrival time using not only the processing program 72 but also various parameters set in the control device 14 regarding the processing. The collector control unit 76 may also use the calculated arrival time as the start time of the mist collector 34.

[0087] In addition, for example, the spraying method of the coolant is not limited to the embodiment. For example, the coolant may be sprayed using a center supply method. In this case, the coolant supplier 32 supplies the coolant to the spindle 18. The coolant may also flow along the inner wall of the cover 30 (processing area 48).

[0088] The processing machine 12 may also be provided with a recovery member (not shown) for recovering the coolant that falls under the workbench 26. The recovery member is, for example, an oil pan disposed on the base 24. A portion of the cooling medium supplied to the processing area 48 does not become mist, but falls under the workbench 26. According to this variation, the coolant that falls under the workbench 26 can be recovered. The recovered coolant can be returned to the coolant tank 50. Thus, the coolant supplier 32 can reuse the recovered coolant. Here, it is preferred to configure a filtering device (filter) between the recovery member and the coolant tank 50. Thus, clean coolant can be returned to the coolant tank 50.

[0089] The processing program 72 may include a control command to start the mist collector 34. In this case, the collector control unit 76 starts the mist collector 34 according to the control command to start the mist collector 34. In addition, the processing program 72 may also include a control command to stop the mist collector 34. In this case, the collector control unit 76 stops the mist collector 34 according to the control command to stop the mist collector 34.

[0090] [Inventions that can be understood from the embodiments] The invention that can be grasped from the above-mentioned embodiment and modified examples is as follows.

[0091] <First Invention> The first invention is a control device (14) for a machine tool (10), wherein the machine tool comprises a coolant supply device (32) for supplying coolant to a processing area (48) and a mist collector (34) for recovering mist in the processing area, wherein the machine tool processes an object in the processing area, and the control device comprises: a processing control unit (74) for controlling the machine tool to perform the processing based on a processing program (72) and determining whether the processing is completed; and a collector control unit (76) for automatically stopping the mist collector when the processing is completed.

[0092] This can reduce the power consumption of the mist collector.

[0093] In the control device, when the coolant is used in the machining, the collector control unit may automatically start the mist collector to collect the mist, thereby preventing the mist from leaking out of the machining area.

[0094] In the control device, when the coolant is used in the processing, the collector control unit stops the mist collector after a predetermined time (TM) has passed since the processing is completed. This can reduce the amount of mist remaining in the processing area after the processing is completed, and suppress the power consumption of the mist collector from becoming excessive.

[0095] In the control device, the processing control unit may determine whether the coolant is used in the processing according to the processing program or the operator's instruction, and the collector control unit may control the mist collector according to the determination result of the processing control unit. Thus, the mist collector is automatically controlled.

[0096] The control device may further include an alarm output unit (80) for outputting an alarm when an abnormality occurs in the machine tool, and when the alarm output unit outputs the alarm, the collector control unit prohibits the operation of the mist collector, thereby preventing the mist collector from operating when an abnormality occurs in the machine tool.

[0097] <Second Invention> A second invention is a machine tool (10) having the control device of the first invention.

[0098] This can suppress an increase in the amount of power consumption of the machine tool.

[0099] The machine tool may further include a sub-control device (78), and when the control device stops, the sub-control device (78) controls the mist collector instead of the collector control unit. Thus, even when the control device stops, the mist collector is automatically controlled.

[0100] <Third Invention> The third invention is a control method, which is a control method for controlling a machine tool by a computer (14), wherein the machine tool has a coolant supply device (32) for supplying coolant to a processing area (48) and a mist collector (34) for recovering mist in the processing area, and the machine tool processes a processing object in the processing area, and the control method includes: an end judgment step (S4), wherein the computer judges whether the processing based on the processing program (72) is completed; and a stop control step (S6), wherein when the processing is completed, the computer controls the mist collector to automatically stop the mist collector.

[0101] This can suppress an increase in the amount of power consumption of the mist collector. Explanation of symbols

[0102] 10, 101... Machine tools 12... Processing machines 14, 142 ... control device 32 ... coolant supply device 34…Mist collector 48…Processing area 72…Processing program 74…Processing control unit 76 ... Collector control unit 78 ... Sub-control device 80 ... alarm output unit TM ... specified time.

Claims

1. A control device (14) for a machine tool (10), the machine tool comprising a coolant supply device (32) for supplying coolant to a processing area (48) and a mist collector (34) for collecting mist in the processing area, the machine tool processing an object in the processing area, the control device characterized by comprising: a processing control unit (74) for controlling the machine tool to perform the processing based on a processing program (72) and determining whether the processing is completed; and A collector control unit (76) automatically stops the mist collector when the processing is completed.

2. The control device according to claim 1, characterized in that: When the coolant is used in the processing, the collector control unit automatically starts the mist collector to collect the mist.

3. The control device according to claim 1 or 2, characterized in that: When the coolant is used in the machining, the collector control unit stops the mist collector after a predetermined time (TM) has elapsed from the end of the machining.

4. The control device according to claim 2 or 3, characterized in that: The processing control unit determines whether to use the coolant in the processing according to the processing program or the instruction of the operator, The collector control unit controls the mist collector according to a determination result of the process control unit.

5. The control device according to any one of claims 1 to 4, characterized in that: It also includes an alarm output unit (80) for outputting an alarm when an abnormality occurs in the machine tool. The collector control unit prohibits the operation of the mist collector when the alarm output unit outputs the alarm.

6. A machine tool (10), characterized in that: A control device according to any one of claims 1 to 5.

7. The machine tool according to claim 6, characterized in that A sub-control device (78) is also provided, which controls the mist collector instead of the collector control unit when the control device stops.

8. A control method for controlling a machine tool by a computer (14), the machine tool comprising a coolant supply device (32) for supplying coolant to a processing area (48) and a mist collector (34) for collecting mist in the processing area, the machine tool processing a processing object in the processing area, the control method comprising: an end determination step (S4), wherein the computer determines whether the processing based on the processing program (72) is completed; as well as The stopping control step (S6) is to control the mist collector by the computer to automatically stop the mist collector when the processing is completed.

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