Working machine and control system of working machine

Abstract

A machine tool includes a housing that encloses a machining space in which a workpiece is machined and has a window portion through which the machining space is visible from the outside, a machining portion provided in the machining space, an operation panel provided outside the housing and configured to input an instruction to the machining portion, and a cooling system configured to cool the machining portion. The cooling system includes a coolant supply portion configured to supply a coolant into the machining space, a coolant prevention portion configured to act to limit adhesion of the coolant to the window portion, and a control portion configured to switch a state of the coolant prevention portion based on a detection result of a sensor configured to detect an operator in the vicinity of the housing. Thus, energy waste can be suppressed.

Description

TECHNICAL FIELD

[0001] The present application relates to a working machine and a control system for a working machine. BACKGROUND

[0002] A large amount of frictional heat is generated when a workpiece is machined with a cutting tool. Generally, a working machine is provided with a function of cooling the cutting tool using a coolant (cutting fluid). In addition, a machining portion of the working machine is surrounded by a cover so that chips generated when the workpiece is machined do not scatter to the surroundings. A window portion is provided on the cover so that a worker can visually recognize the progress of the machining work. On the other hand, the coolant and the chips scatter to the window portion, which hinders the worker's view through the window portion.

[0003] Therefore, Patent Literature 1 proposes a system provided with a window of a working machine and a device that removes droplets of cutting fluid from the window of the working machine, the device being provided with one or a plurality of transducers mounted on the window, each of which is able to act to generate ultrasonic waves in the window, and a generator that supplies an ultrasonic wave drive signal to the one or the plurality of transducers, in the operation of the system, droplets of cutting fluid are removed from the window by ultrasonic waves.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Application Laid-Open No. 2016-527091 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In a system provided with a device that removes droplets of cutting fluid from a window of a working machine as in Patent Literature 1, the device that removes droplets of cutting fluid from the window is always operated, and energy is consumed for the operation of the device. However, as the automation of the machining work of a workpiece using the working machine advances, the frequency of the worker visually recognizing the progress of the machining work through the window portion decreases. Therefore, in the case where the above-described device is always operated, energy required or more is consumed.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] A technical solution of the present application relates to a machine tool, including: a housing that surrounds a machining space in which a workpiece is machined and has a window portion through which the machining space is visible from the outside; a machining portion provided in the machining space; an operation panel provided outside the housing and configured to input an instruction to the machining portion; and a cooling system configured to cool the machining portion. The cooling system includes: a coolant supply portion configured to supply a coolant into the machining space; a coolant prevention portion configured to act to restrict adhesion of the coolant to the window portion; and a control portion configured to switch a state of the coolant prevention portion based on a detection result of a sensor that detects a worker in the vicinity of the housing.

[0011] Another technical solution of the present application relates to a control system of a machine tool, including: a plurality of machine tools; and a second camera configured to monitor the plurality of machine tools. The sensor detects the worker through the second camera.

[0012] Effects of the Invention

[0013] According to the present application, it is possible to provide a machine tool and a control system thereof that can suppress waste of energy.

[0014] The novel features of the application are set forth with particularity in the claims that follow. A machine tool according to an embodiment of the present application, both structure and content, together with those other objectives and advantages that will become subsequent apparent will best be understood from the following detailed description, taken in conjunction with the accompanying drawings, wherein: BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view showing a configuration of an example of a machine tool according to an embodiment of the present application.

[0016] Figure 2 is a schematic perspective view of a structure in a machining space of the machine tool.

[0017] Figure 3 is a block diagram showing a configuration of a cooling system of the machine tool.

[0018] Figure 4 is a configuration diagram showing an example of a coolant prevention portion.

[0019] Figure 5 is a block diagram showing a schematic configuration of a control system of a plurality of machine tools.

[0020] Figure 6 is a flowchart showing an example of control of the coolant prevention portion.

[0021] Figure 7 is a flowchart showing another example of control of the coolant prevention portion. DETAILED DESCRIPTION

[0022] The working machine according to the present embodiment has a housing, a machining section, an operation panel, a cooling system, and the like. In addition, the working machine can be exemplified by a lathe, a machining center of a vertical or horizontal type, a hybrid machine tool having a turning function using a fixed tool and a milling function using a rotary tool, a 5-axis machine tool controlled by two or more rotary axes in addition to X, Y, and Z axes, an additive manufacturing (AM) machine capable of performing metal additive machining, and the like, but is not limited to these.

[0023] The housing surrounds a machining space in which a workpiece is machined, and has a window portion for visually observing the machining space from the outside. The housing is also referred to as a shield, and functions to restrict chips and coolant generated when the workpiece is machined in the machining space to remain in the machining space. The housing generally has a side wall and a ceiling wall that surround the machining space. The housing can also have a door that moves relatively to the housing. The door switches an opening formed in the housing between an open state and a closed state, for example, by sliding movement along the opening. In the open state, entry of an operator into the machining space is enabled, and in the closed state, machining of the workpiece is performed. The window portion can also be provided on the door of the housing.

[0024] The machining section is a main section of the working machine provided in the machining space. The machining section has, for example, a workpiece table that fixes the workpiece, a main shaft attached to a bed column, and a cutting tool (a tool head) fixed to the main shaft. Alternatively, the machining section can have a main shaft table that fixes the workpiece and a tool table that fixes the cutting tool for machining the workpiece.

[0025] The operation panel is a device for inputting an instruction to the machining section, and is provided outside the housing. In the operation panel, a CPU board, a main storage device, an auxiliary storage device, and the like are built in. The operation panel is provided, for example, in the vicinity of the opening or the door of the housing for convenience. The operation panel can also be configured to enable global control of the working machine including the machining section.

[0026] The cooling system is a system that cools the workpiece and the cutting tool, and has a coolant supply portion that supplies coolant into the machining space, a coolant defense portion that functions to restrict adhesion of the coolant to the window portion, and a control portion (hereinafter referred to as a field-of-view control portion) that switches a state of the coolant defense portion based on a detection result of an operator sensor (hereinafter referred to as an operator sensor) that detects an operator in the vicinity of the housing. The operator sensor can be built in the working machine or can be disposed outside the working machine.

[0027] By the cooperation of the coolant defense section, the operator sensor, and the field of view control section, the visual observation of the machining space through the window section by the operator can always be clear, and the waste of energy can be suppressed. For example, in the case where the unmanned of the factory is promoted, and the frequency of the operator visually observing the progress of the machining operation through the window section is reduced, the coolant defense section can also act with the minimum required, and no longer waste energy required or more.

[0028] For example, the coolant supply section has a nozzle for spraying a large amount of liquid coolant toward the workpiece and the cutting tool. The coolant sprayed onto the workpiece and the cutting tool is recovered by a prescribed recovery section, and is reused after being separated from the chips. As another example, a form in which the coolant is sprayed from the tool tip end through the inside of the spindle, a form in which the coolant is sprayed from the ceiling in order to flush the chips in the machining space, and the like can be given.

[0029] The coolant defense section is not particularly limited as long as it acts to limit the adhesion of the coolant to the window section. For example, an air sprayer device that sprays air toward the window section, a rotating window that shakes off the coolant adhering to the window section by centrifugal force, and the like can be given. Since these coolant defense sections all consume energy such as electric power in the act, it is desirable to repeatedly act and rest efficiently. However, in the past, the act could not always be continued, and a large amount of energy was wasted.

[0030] The operator sensor can detect the operator in the periphery of the cover, and the structure thereof is not particularly limited. For example, by selectively causing the coolant defense section to act by the field of view control section only when the operator sensor detects the presence of the operator in the periphery of the cover, the waste of energy can be suppressed. For example, the presence of the operator can be detected non-contact by an infrared sensor, an optical sensor, an image recognition camera, and the like, but is not limited to these. For example, an image recognition camera of a higher system that manages a plurality of working machines can be used.

[0031] The field of view control section can be configured using, for example, a CPU board, a main storage device, an auxiliary storage device, and the like built into the operation panel, and can use the control section of the higher management section that manages a plurality of working machines.

[0032] Next, a summary of the control content of the field of view control section provided to the cooling system will be described.

[0033] The field-of-view control section issues an instruction to set the coolant guard section to the second state when the worker sensor does not detect a worker, and issues an instruction to set the coolant guard section to the first state when the worker sensor detects a worker. The first state is a state in which the coolant guard section operates, and the second state is an inactive state in which the coolant guard section does not operate, or a state in which the coolant guard section operates at a lower output than the first state. When the worker sensor does not detect a worker, it is not possible for the worker to visually observe the machining space through the window section, so the coolant guard section is preferably in the inactive state. Further, in the case where the coolant guard section is caused to operate at a lower output than the first state, the window section is not excessively soiled, and the window section can be made clean at the point of time at which the first state is assumed. The operation at the lower output in the second state does not necessarily need to make the window section clean to the extent that visual observation through the window section is possible in the operation. Here, the "output" refers to power (W). That is, the power of the coolant guard section in the second state is sufficiently smaller than the power in the first state.

[0034] The first state can also be selected from a plurality of output states. For example, the field-of-view control section can also select one from a plurality of output states based on the duration of the most recent second state. For example, when the duration of the most recent second state is long, the coolant guard section is caused to operate in a state of a higher output, and the coolant and chips that have adhered to the window section during the second state can be promptly removed to make the field of view clean more quickly. On the other hand, when the duration of the most recent second state is short, since the amount of coolant and chips that have adhered to the window section during the second state is small, the coolant guard section can be caused to operate in a state of a lower output. Thus, it is possible to effectively suppress waste of energy. The selectable output states can be two, or three or more. For example, one can be selected from two of a normal output state and a higher output state than the normal output state, or one can be selected from different higher output states of a plurality of output states.

[0035] The field-of-view control section can also control the coolant guard section to lower or raise the output of the first state based on the duration of the first state. For example, the coolant and chips that have adhered to the window section can be removed in a high output state in an initial stage after the second state is switched to the first state, and then the normal output state is switched. In this case, for example, if the worker performs a visual operation, a good field of view can be promptly and smoothly ensured.

[0036] On the other hand, in the case where the duration of the first state is longer than a prescribed time, the field-of-view control section automatically switches the output state of the coolant guard section to a higher output state. Thus, the worker can automatically ensure a cleaner field of view without his or her own operation.

[0037] The field-of-view control section can also be switchable between a first mode and a second mode. Here, the first mode is a mode in which the field-of-view control section switches the state of the coolant guard section based on the detection result of the sensor. Further, the second mode is a mode in which the state of the coolant guard section can be switched manually. Thus, flexible operation of the work machine corresponding to the situation can be performed.

[0038] The operator sensor can also detect the operator by an object action of the operator. The object action can also be, for example, an action of the operator in the periphery of the operation panel or the window section.

[0039] The action of the operator in the periphery of the operation panel is typically an operation of the operation panel performed by the operator. In this case, the operator sensor can detect an operation signal of the operation panel, or can detect the object action (operation of the operation panel) of the operator when the operator contacts the operation panel, for example, by a pressure sensor or the like.

[0040] The action of the operator in the periphery of the window section can also be a visual action through the machining space via the window section performed by the operator. In such a visual action, the operator needs to bring the face in close proximity to the window section. Thus, the operator sensor can detect the proximity of the operator to the window section as the visual action. Such detection can be performed by an infrared sensor or the like provided in the vicinity of the window section outside the cover, but can also be performed by a camera device (hereinafter referred to as a first camera device) provided in the machining space.

[0041] The first camera device is provided, for example, in the machining space for the purpose of monitoring the machining state of the workpiece, monitoring the accumulation state of the chips, measuring the size of the machined workpiece, detecting an abnormal state, or the like. By using the first camera device, it is no longer necessary to prepare an operator sensor dedicated to the cooling system. Further, the first camera device provided in the machining space is less sensitive to the action of the operator outside the cover, and detects the visual action when the operator brings the face in close proximity to the window section, so that the false operation of the coolant guard section is suppressed. That is, the visual action through the machining space via the window section performed by the operator can be detected with high accuracy while suppressing an increase in cost.

[0042] Next, the present invention includes a control system for machine tools. In a factory with multiple machine tools, there is typically a higher-level management unit that manages these machines. This higher-level management unit, for example, directs the creation and execution of work schedules within the factory, and typically includes at least one camera device (hereinafter referred to as a second camera device) to monitor the operating status of the multiple machine tools. The second camera device can also function as a worker sensor. For example, the second camera device detects the worker's object movement through image detection and transmits the detection results to a field-of-view control unit. The field-of-view control unit can be provided by the higher-level management unit or by each machine tool. When each machine tool has a field-of-view control unit, the required instructions are transmitted from the higher-level management unit to each field-of-view control unit.

[0043] The following is a reference to the appendix. Figure 1 The following describes embodiments of the machine tool and its control system according to the present invention. In the description of each embodiment, appropriate terms indicating direction (e.g., "X-axis," "Y-axis," "Z-axis," etc.) are used, but these terms are for illustrative purposes and not intended to limit the invention. Furthermore, in each figure, the shape or size of the constituent parts of the machine tool is not necessarily represented by the same scale. Also, the same reference numerals are used for the same constituent parts in each figure.

[0044] Figure 1 This is a schematic perspective view showing the overall structure of the machine tool 100 according to an embodiment of the present invention. Figure 2 It is a schematic three-dimensional view of the processing space S of the machine tool 100. Figure 3 This is a block diagram showing the general structure of cooling system 2. Figure 4 This is a structural diagram showing an example of a coolant defense section.

[0045] 100 working machines Figure 1 As shown, it is directly installed on the floor of a factory or similar facility. The machine tool 100 includes: a cover 101 that surrounds the machining space S for processing workpiece W and has a window 101W for viewing the machining space S from the outside; a bed 102, surrounded by the cover 101 and disposed within the machining space S; and a bed post 103 extending from the bed 102 in the Z direction (…). Figure 1 (above); sliding seat 104, extending from bed post 103 in the X direction ( Figure 1 The machine tool 102 extends to the left of the bed; the spindle head 105 is fixed on the sliding support 104; the cutting tool 21 is detachably mounted on the spindle head 105; and the table 106 fixes and supports the workpiece W, which is the workpiece to be machined. The machine tool 102, the bed column 103, the sliding support 104, the spindle head 105, the cutting tool 21, and the table 106 constitute the machining section 1.

[0046] The machine tool 100, by replacing the cutting tool 21 with any suitable machining tool such as a drilling tool (drill bit) or a grinding tool (grinding stone), can perform drilling, grinding, and other machining operations on a workpiece W placed on a table 106. The machine tool 100 may also be, for example, a 5-axis composite machining machine that controls the X-axis, Y-axis, Z-axis, rotary axis, and tilt axis to perform multi-face machining on the workpiece W in a single clamping operation.

[0047] In addition, the machine tool 100 includes: a coolant supply unit 30 (see reference) Figure 2 The machine tool 101 supplies coolant to the machining space S; an operation panel 107, located outside the cover 101, inputs commands to the machining unit 1; a coolant protection unit 108 operates to limit coolant adhesion to the window 101W; a first imaging device 40, such as a CCD camera, also serves as an operator sensor for detecting the operator; and a field of view control unit 109 switches the state of the coolant protection unit 108 based on the detection results of the first imaging device 40. The coolant protection unit 108 has the form of a rotating window located at the window 101W of the cover 101, and the rotating window itself functions as the coolant protection unit 108. The first imaging device 40 also monitors the workpiece W, the cutting tool 21, and their background during machining. Here, the field of view control unit 109 is constructed using a CPU board, main storage device, auxiliary storage device, etc., built into the operation panel 107.

[0048] The cooling system 2 consists of a coolant supply unit 30, a coolant protection unit (rotating window) 108 located at the window 101W, a first camera device 40 that also serves as a worker sensor, and a field of view control unit 109 built into the operation panel 107. The coolant sprayed onto the workpiece W and the cutting tool 21 is recovered by the coolant recovery unit 110 and reused after being separated from the chips.

[0049] exist Figure 1 and Figure 2 In this process, workpiece W is fixed on stage 106 and has a circular protrusion T centered on the Z-axis. Within the machining space S, there is a drive unit 20 that rotates the cutting tool 21 and multiple lighting units 50, including LEDs, that illuminate the workpiece W during machining. The cutting tool 21 is mounted on the spindle head 105 via a drive rod 22 and is configured to rotate about a central axis parallel to the Z-axis. By the rotating cutting tool 21 abutting against the vertical surface (side surface along the Z-axis direction) of the protrusion T of the workpiece W, the protrusion T of the workpiece W is machined to have an arbitrary radius. Furthermore, the machining method of the machine tool 100 is not limited to this invention. Similarly, the machining of workpiece W is not limited to the simple shape described above; this invention can handle a wide variety of shapes and machining applications, such as those achieved by a 5-axis composite machining center.

[0050] During machining of the working machine 100, the cutting tool 21 is rotated around the Z axis using the motor (driving section 20) disposed in the spindle head 105, is brought into contact with the convex portion T of the workpiece W, and is cooled by spraying a large amount of coolant from the nozzle 31 of the coolant supply section 30 toward the workpiece W and the cutting tool 21. The coolant sprayed from the nozzle 31 collides on the workpiece W and the cutting tool 21 and scatters, forming droplets. In addition, among the scattering matters generated during machining of the workpiece, in addition to the droplets of the coolant, a large amount of chips generated from the workpiece during machining is contained. These scattering matters always adhere to the window section 101W used for visualizing the machining space.

[0051] The first imaging device 40 functions as an operator sensor that detects the operator's visualizing operation of the machining space via the rotary window provided on the window section 101W (i.e., the operator's approach to the window section). The detection result is transmitted to the field-of-view control section 109, and based on the result, the field-of-view control section 109 selects the state of the coolant defense section 108 (rotary window) and switches as necessary.

[0052] In Figure 4 , the coolant defense section 108 includes a ring-shaped frame 1011, an inner-frame window section 1012 that rotates within the ring-shaped frame 1011, a central driving section (motor) 1013 that is disposed at the center of the inner-frame window section 1012 and rotates the inner-frame window section 1012, and an air nozzle 1014 that blows air into the gap between the ring-shaped frame 1011 and the inner-frame window section 1012. The central driving section 1013 is supported by a bridge 1015 that is connected to the ring-shaped frame 1011 and also functions to fix the inner-frame window section 1012 to the center of the ring-shaped frame 1011. The rotary window limits the adhesion of coolant to the inner-frame window section 1012 itself by rotating the inner-frame window section 1012 at high speed by means of centrifugal force. By switching the state of the coolant defense section 108 by the field-of-view control section 109, the operator can always ensure a clean field of view while saving the energy used to drive the coolant defense section 108, since the coolant defense section 108 rotates at high speed at the point in time when the operator needs to visualize.

[0053] Next, a control system that controls a plurality of working machines will be described. Figure 5is a block diagram showing an outline configuration of a control system 3 of a plurality of working machines. The control system 3 has a plurality of working machines A to C (100A, 100B, 100C (hereinafter, A, B, C are collectively expressed as N)) and a higher management unit 200 that manages the plurality of working machines 100N. The higher management unit 200 is provided with a second camera 240 that monitors the state of the plurality of working machines 100N. In this case, the second camera 240 can serve as a worker sensor, and the second camera 240 detects the subject action of the worker. The higher management unit 200 is provided with a plurality of field-of-view control units A to C (109N) of the plurality of working machines 100N, which constitute a part of a cooling system 2N of the plurality of working machines 100N. The field-of-view control unit 109N controls a coolant protection unit A to C (108N) of the working machine as a subject based on the detection result. The content of the control is the same as the cooling system 2 provided to the working machine. In addition, the number of working machines provided to the control system 3 is not particularly limited, and the number of second cameras 240 is not limited to one, and can be a plurality.

[0054] Next, a specific example of the content of the control of the field-of-view control unit 109 provided to the cooling system 2 will be described. Figure 6 is a flowchart showing an example of the control of the coolant protection unit 108 (first mode). Here, a case where the field-of-view control unit 109 can be switched between a first mode and a second mode will be described illustratively. In the first mode, the field-of-view control unit 109 automatically switches the state of the coolant protection unit 108 between a first state and a second state based on the detection result of the worker sensor (first camera 40 or second camera 240). On the other hand, in the second mode, the worker can manually switch the state of the coolant protection unit 108, and the field-of-view control unit 109 does not automatically act. The first state is a state in which the coolant protection unit 108 acts, and the second state is an inactive state in which the coolant protection unit 108 does not act, or an idle state in which the coolant protection unit 108 acts at a sufficiently low output compared to the first state.

[0055] First, the field of view control section 109 determines whether it is in the first mode (STOl). In the case of not being the first mode (N), the field of view control section 109 is in the second mode, so the control ends at this point. On the other hand, in the case of being the first mode (Y), the field of view control section 109 determines whether the operator sensor has detected the operator's visual action (ST02). In the case of not detecting the operator's visual action (N), the field of view control section 109 selects the second state, and causes the coolant protection section 108 to be inactivated or maintained in the idling state (ST03). On the other hand, in the case of detecting the operator's visual action (Y), the field of view control section 109 determines whether the coolant protection section 108 is in the first state at this point (ST04). In the case of the coolant protection section 108 already being in operation in the first state (Y), the control is repeated in the same manner as in ST02. On the other hand, in the case of the coolant protection section 108 not being in the first state (N), the coolant protection section 108 is switched to the first state and caused to operate (ST05) since it is in the second state at this point. Then, the control is repeated in the same manner as in ST02.

[0056] Figure 7 is a flowchart showing another example (second mode) of the control of the coolant protection section 108. Here, a case in which the output of the first state is set to the first output (normal output) or to the second output (high output) which is sufficiently higher than the first output is explained according to whether the duration tl of the first state is shorter than the prescribed time Tl, and further according to whether the duration t2 of the most recent second state is shorter than the prescribed time T2.

[0057] In the control by the field of view control section 109 of the second mode, STOl to ST04 are the same as in the first mode. In ST04, when it is determined that the coolant protection section 108 is in the first state (Y), the field of view control section 109 determines whether the duration tl of the first state is Tl or more (i.e., whether tl ≥ Tl holds) (ST05). In the case of tl < Tl holding (tl < Tl holds), since it is presumed that the visual action by the operator can be performed smoothly in a short time, the field of view control section 109 causes the coolant protection section 108 to operate with the normal output (ST06). Then, the control is repeated in the same manner as in ST02.

[0058] On the other hand, in the case of tl ≥ Tl holding (Y), since the visual action by the operator is continued over a relatively long period, it is assumed that the field of view through the window is still poor, or that the situation requires confirmation of the precise operation by the operator. In this case, the field of view control section 109 causes the coolant protection section 108 to operate with the high output (ST07). Then, the flow returns to ST02, and the control is repeated in the same manner as in ST02.

[0059] In ST04, when it is judged that the coolant defense portion 108 is not in the 1st state (N), the field of view control portion 109 is in the 2nd state. In this case, it is judged whether the duration t2 of the nearest 2nd state is shorter than the prescribed time T2 (i.e., whether t2 < T2 holds) (ST08). In the case where t2 < T2 holds (Y), it is inferred that the degree of contamination of the window portion is small, so the field of view control portion 109 causes the coolant defense portion 108 to act at the normal output (ST06). Then, the flow returns to ST02, and the same control is repeated. On the other hand, in the case where t2 ≥ T2 holds (N), it is inferred that the degree of contamination of the window portion is large, so the field of view control portion 109 causes the coolant defense portion 108 to act at the high output (ST07). Then, the flow returns to ST02, and the same control is repeated until ST04. Next, in ST05, it is judged whether the actuation time t3 at the high output is shorter than the prescribed time T3 (i.e., whether 0 < t3 < T3 holds). In the case where 0 < t3 < T3 holds (Y), the coolant defense portion 108 is then caused to act at the high output (ST07). On the other hand, in the case where t3 ≥ T3 holds (N), the field of view control portion 109 causes the coolant defense portion 108 to act at the normal output (ST06). Then, the flow returns to ST02, and the same control is repeated.

[0060] As above, in ST05, it is judged whether t1 ≥ T1 holds, and in parallel, it is judged whether 0 < t3 < T3 holds, and the coolant defense portion 108 is caused to act at the high output as long as either t1 ≥ T1 and 0 < t3 < T3 holds. That is, in the case where 0 < t3 < T3 holds, even if t1 < T1, the coolant defense portion 108 is caused to act at the high output. Further, in the case where t1 ≥ T1 holds, even if t3 ≥ T3, the coolant defense portion 108 is caused to act at the high output. In addition, when t2 < T2 holds, t3 = 0.

[0061] The embodiments disclosed this time can be applied to all aspects. They should not be interpreted to be limited to the above description but be interpreted to embrace all modifications equivalent in meaning and scope to the claims.

[0062] Industrial Applicability

[0063] The present application can be used for a working machine provided with a cooling system and a control system thereof.

[0064] Explanation of Reference Numerals

[0065] 1 … machined portion; 2 … cooling system; 3 … control system; 20 … drive portion; 21 … cutting tool; 22 … drive rod; 30 … coolant supply portion; 31 … nozzle; 40 (240) … camera; 50 … illumination portion; 100 … working machine; 101 … cover; 101W … window portion; 1011 … annular frame; 1012 … in-frame window portion; 1013 … central drive portion (motor); 1014 … air nozzle; 1015 … bridge portion; 102 … bed; 103 … bed column; 104 … slide carriage; 105 … spindle head; 106 … table; 107 … operation panel; 108 … coolant guard portion (revolving window); 109 … field of view control portion; 110 … coolant recovery portion; W … workpiece (work); S … machining space.

Claims

1. A type of machine tool, characterized in that, have: A cover that surrounds the processing space of the workpiece and has a window for viewing the processing space from the outside; The machining department is located within the machining space; An operation panel, located outside the cover, is used to input commands to the machining section; and The cooling system cools the machining part. The cooling system includes: The coolant supply unit supplies coolant into the processing space; The coolant defense section operates to limit the adhesion of the coolant to the window portion; and The control unit, based on the detection results of sensors around the perimeter of the shield used to detect the operator, switches the state of the coolant defense unit. The control unit sets the coolant defense unit to state 1 when the sensor detects the operator, and sets it to state 2 when the sensor does not detect the operator. The first state is the state in which the coolant defense unit is activated. The second state is either a dormant state where the coolant defense unit is not activated, or a state where it operates with lower output compared to the first state. The first state is selected from multiple output states. The control unit selects one of the plurality of output states based on the duration of the most recent second state.

2. A type of machine tool, characterized in that, have: A cover that surrounds the processing space of the workpiece and has a window for viewing the processing space from the outside; The machining department is located within the machining space; An operation panel, located outside the cover, is used to input commands to the machining section; and The cooling system cools the machining part. The cooling system includes: The coolant supply unit supplies coolant into the processing space; The coolant defense section operates to limit the adhesion of the coolant to the window portion; and The control unit, based on the detection results of sensors around the perimeter of the shield used to detect the operator, switches the state of the coolant defense unit. The control unit sets the coolant defense unit to state 1 when the sensor detects the operator, and sets it to state 2 when the sensor does not detect the operator. The first state is the state in which the coolant defense unit is activated. The second state is either a dormant state where the coolant defense unit is not activated, or a state where it operates with lower output compared to the first state. The control unit adjusts the output of the first state based on the duration of the first state, causing the output of the first state to decrease or increase.

3. A type of machine tool, characterized in that, have: A cover that surrounds the processing space of the workpiece and has a window for viewing the processing space from the outside; The machining department is located within the machining space; An operation panel, located outside the cover, is used to input commands to the machining section; and The cooling system cools the machining part. The cooling system includes: The coolant supply unit supplies coolant into the processing space; The coolant defense section operates to limit the adhesion of the coolant to the window portion; and The control unit, based on the detection results of sensors around the perimeter of the shield used to detect the operator, switches the state of the coolant defense unit. The control unit can switch between mode 1 and mode 2. In the first mode, the control unit switches the state of the coolant defense unit based on the detection results of the sensor. In the second mode, the state of the coolant defense unit can be manually switched.

4. The working machine as described in claim 3, characterized in that, The control unit sets the coolant defense unit to state 1 when the sensor detects the operator, and sets it to state 2 when the sensor does not detect the operator. The first state is the state in which the coolant defense unit is activated. The second state is either a resting state where the coolant defense unit is not activated, or a state where it operates with lower output compared to the first state.

5. The working machine as described in claim 2 or 4, characterized in that, The first state is selected from multiple output states. The control unit selects one of the plurality of output states based on the duration of the most recent second state.

6. The working machine as described in claim 1 or 4, characterized in that, The control unit adjusts the output of the first state based on the duration of the first state, causing the output of the first state to decrease or increase.

7. The working machine as described in claim 1 or 2, characterized in that, The control unit can switch between mode 1 and mode 2. In the first mode, the control unit switches the state of the coolant defense unit based on the detection results of the sensor. In the second mode, the state of the coolant defense unit can be manually switched.

8. The working machine as described in any one of claims 1 to 4, characterized in that, The sensor detects the operator by observing the operator's object movements.

9. The working machine as described in claim 8, characterized in that, The object action is the action of the operator around the control panel or the window.

10. The working machine as described in claim 8, characterized in that, The object movement is a visual movement performed by the operator through the processing space via the window.

11. The working machine as described in claim 10, characterized in that, The sensor detects the worker's approach to the window as the visual action.

12. The working machine as described in claim 11, characterized in that, The sensor detects the operator's approach to the window via a first camera device located within the processing space.

13. A control system for a machine tool, characterized in that, have: The working machinery according to any one of claims 1 to 3; and The second camera device monitors the working machinery according to any one of claims 1 to 3, and the sensor detects the operator through the second camera device.

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