JP2016135519A - Processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processing device that can detect leakage of coolant liquid outside a space where cutting processing is performed.SOLUTION: A processing device, which performs cutting processing to an upper work-piece in a first space using a processing tool by changing a relative positional relation between a work-piece and the processing tool three-dimensionally and sprays liquid to the work-piece and the processing tool during the cutting processing, has: measuring means that is arranged outside the first space and measures potentials, where measured potentials are varied when liquid contacts the means; acquiring means that acquires varied potentials if the potentials measured by the measuring means are varied; determining means that determines whether or not the potentials acquired by the acquiring means exceed a predetermined threshold and determines that the liquid contacts the measuring means only when determining that the potentials exceed the predetermined threshold; and warning means that warns an operator when the determining means determines that the liquid contacts the measuring means.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a processing apparatus, and more particularly to a processing apparatus that processes a workpiece in three dimensions based on predetermined data by numerical control using a microcomputer or the like.

  2. Description of the Related Art Conventionally, a processing apparatus that processes a workpiece in three dimensions based on predetermined data by numerical control using a microcomputer or the like is known.

In such a processing apparatus, the main shaft to which the processing tool is attached and the work holding unit that holds the work move in the X-axis direction, the Y-axis direction, and the Z-axis direction of the XYZ orthogonal coordinate system, and rotate around each axis. By moving, the processing tool is brought into contact with a predetermined position of the workpiece at a predetermined angle, and the workpiece is cut by the processing tool to be formed into a desired shape.

  By the way, in such a processing apparatus, a processing space is provided in which a workpiece is cut by a processing tool, and a moving device for moving the spindle and the work holding unit, a driving device for driving the moving device, and the like are provided. These are disposed in a space adjacent to the processing space.

  Note that the machining space and the space in which the moving device is disposed are independent from each other, and the machining space and the space are made of, for example, a rubber bellows-like member so that the main shaft and the work holding unit can move. It is partitioned.

And at the time of cutting, coolant liquid was injected with respect to the part into which the workpiece | work is cut with the processing tool within the processing space, and the friction in the said part was suppressed and the said part was cooled.

  However, when the bellows-like member that partitions the processing space and the space in which the moving device is disposed is damaged due to deterioration or the like, the coolant liquid enters the space from the processing space.

Then, if further cutting is performed without noticing the breakage in the bellows-like member, the coolant liquid further enters the space where the moving device is disposed from the damaged portion, and the amount of the coolant liquid to enter is large. In this case, there has been a problem that the coolant liquid enters the drive device that drives the moving device and the drive device breaks down.

  Further, in such a processing apparatus, a tube for supplying the coolant liquid to the injection unit for injecting the coolant liquid from the tank in which the coolant liquid is stored is disposed.

  Such a tube is provided with a flow rate sensor for measuring the amount of coolant liquid supplied to the injection unit. At the connection between the sensor and the tube, the coolant leaks due to deterioration of the connection. I was doing it.

When the coolant liquid leaks from the connecting portion, the coolant liquid enters the control device or the like disposed in the vicinity of the tube, causing a problem such as failure of the control device.

For this reason, in a processing apparatus that uses a coolant liquid to suppress friction and cool the work tool and workpiece, a processing apparatus that can detect leakage (intrusion) of the coolant liquid outside the space where the cutting process is performed is proposed. Was desired.

  Note that the prior art that the applicant of the present application knows at the time of filing a patent application is not an invention related to a known literature invention, and therefore there is no prior art document information to be described in the present specification.

  The present invention has been made in view of the above-described demands of the prior art, and an object of the present invention is to detect leakage of coolant liquid outside a space where cutting processing is performed. A processing apparatus is to be provided.

  In order to achieve the above object, the present invention changes the relative positional relationship between a workpiece and a machining tool in three dimensions, and performs a cutting process on the workpiece with the machining tool in a first space. In the processing apparatus for injecting a liquid onto the workpiece and the processing tool during the cutting process, the measuring means is disposed outside the first space and measures a potential and changes a measured value when the liquid comes into contact And an acquisition means for acquiring the changed potential when the potential measured by the measurement means changes, and determining whether or not the potential acquired by the acquisition means is a value exceeding a predetermined threshold value, Only when it is determined that the potential has exceeded the predetermined threshold, it is determined that the liquid has contacted the measuring means, and the determining means determines that the liquid has contacted the measuring means. When, in which so as to have a warning means for performing a warning to the operator.

  Further, the present invention is the above-described invention, further comprising a control unit that controls to stop the processing when the determination unit determines that the liquid has contacted the measurement unit.

  Further, the present invention is the above-described invention, wherein the measuring means is independent of the first space and is used to move a workpiece holding portion that holds the workpiece and a spindle that holds the processing tool. It is arranged at a substantially lowermost position in the second space in which the moving means is arranged.

  Further, the present invention is the above-described invention, wherein the measuring means is disposed below the tube through which the liquid is delivered and the connecting portion of the tube, and one end is below the other end. It is arranged in the vicinity of the one end of the bowl-shaped member that is inclined so as to be located on the side.

  Further, the present invention is the above-described invention, wherein the measuring means includes three electrodes at a predetermined interval, and a non-electrode portion is formed between the electrodes.

  Since the present invention is configured as described above, it has an excellent effect that it is possible to detect the leakage of the coolant liquid outside the space where the cutting process is performed.

FIG. 1 is a perspective view of a schematic configuration of a processing apparatus according to the present invention. FIG. 2 is a view taken in the direction of arrow I in FIG. 1 with a part of the drive mechanism exposed. 3 is a view taken in the direction of arrow II in FIG. FIG. 4 is an enlarged explanatory view in which the vicinity of the drive mechanism of the work holding unit is enlarged. FIG. 5A is a schematic configuration explanatory diagram of the sensor, and FIG. 5B is an explanatory diagram illustrating a state where the sensor is attached to the processing apparatus. 6A is a rear view of the processing apparatus shown in FIG. 1 with the internal structure exposed, and FIG. 6B is an enlarged view of the vicinity of the tube that conveys the coolant liquid in FIG. FIG. 6C is an explanatory view showing a sensor disposed in the vicinity of the left side end of the bowl-shaped member. FIG. 7 is a block diagram illustrating a functional configuration of the microcomputer. FIG. 8 is an explanatory diagram showing the installation position of the sensor in the space S. FIG.

Hereinafter, an example of an embodiment of a processing apparatus according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a schematic configuration perspective view of a processing apparatus according to the present invention, and FIG. 2 shows a view taken in the direction of arrow I in FIG. 1 with a part of the drive mechanism exposed. FIG. 3 is a view taken along arrow II in FIG.

  The processing apparatus 10 shown in FIG. 1 is provided on the upper surface 30a of the processing space 30 provided in the housing 12, provided on the cutting portion 14 for cutting the workpiece 200, and the right side surface 30b of the processing space 30. The workpiece holding unit 16 that holds 200 and the tank 24 that stores liquid on the lower side of the machining space 30 are configured. In the present embodiment, a case where a coolant liquid is used as the liquid will be described.

  The processing space 30 is a space in which the workpiece 200 performs a cutting process with the processing tool 26, and has a substantially square box shape in which the front side is opened by the top surface 30a, the right side surface 30b, the left side surface 30c, the back surface 30d, and the bottom surface 30e. It is formed and it will be in the closed state interrupted | blocked from the external space by the cover 12a of the housing | casing 12. FIG.

  The bottom surface 30e is provided with a waste liquid port 30ea for discarding the coolant liquid sprayed to the processing tool 26 and the workpiece 200 during the cutting process, and the coolant liquid discarded from the waste liquid port 30ea. Will return to the tank 24.

  The processing space 30 is provided in the processing apparatus 10 in a state inclined at a predetermined angle, and a space S in which a moving member 40 (described later), a driving device 50 (described later), and the like are disposed. And are independent of each other.

  The entire operation of the processing apparatus 10 is controlled by the microcomputer 18. In FIG. 1, such a microcomputer 18 is displayed outside the processing apparatus 10, but is actually built in the back side of the housing 12.

Further, for example, a personal computer (not shown) provided separately is connected to the microcomputer 18, and processing data indicating the shape of a processed product to be produced from the personal computer by an operator is provided. The various data are input to the microcomputer 18.

  More specifically, in the cutting unit 14, the main shaft 20 is fixedly disposed on a moving member 40 that can move in the X-axis direction and the Z-axis direction of the XYZ orthogonal coordinate system on the upper surface 30 a of the processing space 30. ing.

  Specifically, the moving member 40 can be moved in the X-axis direction by a motor 42 as a driving member, and can be moved in the Z-axis direction by a motor 46 as a driving member in the carriage 44. And a carriage 48. The moving member 40 is disposed in the space S adjacent to the machining space 30, and the space S is independent from the machining space 30.

  The main shaft 20 is fixedly disposed on the carriage 48. At this time, the spindle 20 is configured such that the tip end portion that grips the machining tool 26 is positioned in the machining space 30 via the bellows-like member 30a-1 provided on the upper surface 30a of the machining space 30.

  The bellows-shaped member 30a-1 is a member formed in a bellows shape so as to be able to protrude toward the bottom surface 30e, and is formed of an elastic material such as rubber, for example.

  Therefore, even if the main shaft 20 is moved in the X-axis direction and the Z-axis direction by the moving member 40 by the bellows-shaped member 30a-1, the processing space 30 and the space S in which the moving member 40 and the like are provided are independent from each other. A state that is a space can be maintained.

Further, the cutting unit 14 is provided with an injection unit (not shown) for injecting a coolant liquid toward the processing tool 26 attached to the main shaft 20.

  Further, the work holding unit 16 is fixedly disposed on a moving member 50 that can move in the Y-axis direction of the XYZ orthogonal coordinate system.

  Specifically, the moving member 50 includes a carriage 54 that can be moved in the Y-axis direction by a motor 52 that is a driving member. The moving member 50 is disposed in the space S that is adjacent to the processing space 30 and independent from the processing space 30 (see FIG. 4).

  In the work holding unit 16, the base unit 16-1 is fixedly disposed on the carriage 54. At this time, the rotation member 16-2 that extends to the left side of the base portion 16-1 is disposed so that the rotation center axis of the rotation member 16-2 is parallel to the X axis, and the rotation member 16 that holds the workpiece 200 is disposed. -2 is positioned in the machining space 30 via a bellows-like member 30b-1 provided on the right side surface 30b of the machining space 30. The rotating member 16-2 is rotated by a motor 58 that is a driving member.

  The bellows-like member 30b-1 is a member formed in a bellows shape so as to be able to protrude toward the left side surface 30c. For example, the bellows-like member 30b-1 is formed of an elastic material such as rubber, and the rotating member 16-2. Are arranged in a rotatable state.

Therefore, with the bellows-like member 30b-1, even when the work holding portion 16 is moved in the Y-axis direction by the moving member 50, the machining space 30 and the space S can be maintained in independent spaces. Is.

  In the space S, a sensor 60 connected to the microcomputer 18 is fixedly disposed on the back surface 100b that forms the space S on the rear side of the moving member 50 (see FIG. 4). That is, the sensor 60 is disposed at a substantially lowermost position in the space S (see FIG. 8).

  Here, the sensor 60 detects contact with the liquid, and forms three electrodes 60-2a, 60-2b, 60-2c at a predetermined interval at the tip portion of the substrate 60-1, and these are formed. Two non-electrode portions 60-3a and 60-3b are formed between the electrodes (see FIG. 5A).

  In the sensor 60, the liquid contacts the non-electrode portions 60-3a and 60-3b, so that the electrodes on both sides of each non-electrode portion are connected at several ohms to several hundreds of kilo ohms.

  Such a change in potential in the sensor 60 is monitored by a potential detection unit 36 (described later) of the microcomputer 18, and when it is determined that a change in potential has occurred, the potential after the change is described in a potential detection unit 36 (described later). ) To detect. The potential detected in this manner is compared with a predetermined threshold value in a determination unit 38 (described later) of the microcomputer 18, and if it is determined that the predetermined threshold value is exceeded, it is determined that the liquid is in contact with the sensor 60. Will be.

  The electrodes 60-2a, 60-2b, and 60-2c can be plated with gold to reduce the occurrence of defects such as rust caused by the liquid in contact with the electrodes, and maintain a stable detection function over a long period of time. be able to.

  Accordingly, the sensor 60 has electrodes 60-2a, 60-2b, 60-2c and non-electrode portions 60-3a, 60-3b formed at the tip portion of the substrate 60-1 in the vicinity of the lowermost portion of the space S. It will be arrange | positioned so that it may be located.

  Specifically, the sensor 60 is fixed to the lower side of the back surface 100b that forms the space S so that the front end portion of the substrate 60-1 is positioned in the vicinity of the base member 100a on which the moving member 50 is disposed. It will be disposed (refer to FIG. 5B).

In addition, since the base member 100a is arrange | positioned substantially parallel to the bottom face 30e which forms the process space 30, a part of bellows-like members 30a-1 and 30b-1 are damaged, and it is space from the process space 30 side. When the coolant liquid enters S, the coolant liquid is stored in the joint portion between the base member 100a and the back surface 100b, and the intruded coolant liquid easily contacts the sensor 60.

  In addition, a pump 66 is disposed below the heating device 10 on the rear side. The pump 66 is connected to the tank 24 in which the coolant liquid is stored by the tube 62 and is connected to the coolant liquid via the tube 64. Is connected to an injection unit (not shown) for injecting (see FIG. 6A).

  When the pump 66 is activated, the coolant liquid stored in the tank 24 is sucked through the tube 62, and the sucked coolant liquid is supplied to the injection unit (not shown) through the tube 64.

  The tube 64 is provided with a flow rate sensor 68 for measuring the flow rate of the coolant liquid delivered from the pump 66.

  Further, a bowl-shaped member 70 is disposed below the tubes 62 and 64 and the flow rate sensor 68. At this time, the bowl-shaped member 70 is also located below the connection portion of the tube 62 and the connection portion of the tube 64.

  Here, the connection portion of the tube 62 is a connection portion P1 between the tube 62 and the pump 66 and a connection portion P2 between the tube 62 and the tank 64. Moreover, the connection part of the tube 64 is the connection part P3 of the tube 64 and the pump 66, and the connection parts P4 and P5 of the tube 64 and the flow rate sensor 68 (refer FIG.6 (b)). In FIG. 6B, the connection portion P1 is hidden behind the connection portion P3.

  Further, the flange member 70 is disposed so as to be inclined such that the left side end portion 70a is positioned below the right side end portion 70b.

  For this reason, even if the coolant liquid leaks out from the tubes 62 and 64, the connection portion of the tube 62, the connection portion of the tube 64, etc., the coolant fluid leaked out by the flange-like member 70 can be collected in the left side end portion 70a. it can.

  A sensor 72 connected to the microcomputer 18 is fixedly disposed in the vicinity of the left side end portion 70a (see FIG. 6C).

  This sensor 72 has the same configuration as that of the sensor 60, and is a sensor that detects contact with a liquid. The sensor 72 has three electrodes 72-2a, 72-2b, 72 at a predetermined interval at the tip portion of the substrate 72-1. -2c is formed, and two non-electrode portions 72-3a and 72-3b are formed between these electrodes (see FIG. 5A).

  In the sensor 72, the non-electrode portions 72-3a and 72-3b come into contact with the liquid, so that the electrodes adjacent to each non-electrode portion are connected at several ohms to several hundred kiloohms.

  Such a change in potential in the sensor 72 is monitored by a potential detection unit 36 (described later) of the microcomputer 18, and when it is determined that a change in potential has occurred, the potential after the change is described in a potential detection unit 36 (described later). ) To detect. The potential detected in this manner is compared with a predetermined threshold value in a determination unit 38 (described later) of the microcomputer 18, and when it is determined that the predetermined threshold value is exceeded, it is determined that the liquid is in contact with the sensor 72. Will be.

  Note that the electrodes 72-2a, 72-2b, and 72-2c can be plated with gold to reduce the occurrence of defects such as rust caused by the liquid in contact with the electrodes, and maintain a stable detection function over the long term. be able to.

Specifically, the sensor 72 includes electrodes 72-2a, 72-2b, and 72-2c and non-electrode portions 72-3a and 72-3b formed on the front end portion of the substrate 72-1, and left end portions. It will be arrange | positioned so that it may adjoin to the bottom face 70c of the bowl-shaped member 70 in the vicinity of 70a.

  The microcomputer 18 controls the overall operation of the processing apparatus 10 and determines whether or not liquid has contacted the sensors 60 and 72.

  Here, the functional configuration of the microcomputer 18 will be described with reference to FIG.

The microcomputer 18 is measured by a control unit 32 that controls the operation of the spindle 20 and the workpiece holding unit 16 based on the machining data, a storage unit 34 that stores various data such as machining data, and sensors 60 and 72. The change in potential is monitored, and a potential detection unit 36 that detects the potential after the change, and whether or not the liquid contacts the sensors 60 and 72 are determined based on the potential detected by the potential detection unit 36. And a determination unit 38.

  The control unit 32 controls the movement of the main shaft 20 in the X-axis direction and the Z-axis direction based on the processing data representing the shape of the workpiece to be manufactured, and also controls the movement of the main shaft 20 around the Z-axis. Rotation control is performed.

  Further, the control unit 32 controls the movement member 50 based on the machining data to control the movement of the work holding unit 16 in the Y-axis direction, and the rotation angle and rotation around the X-axis of the rotation member 16-2. Control the speed.

  The control unit 32 also monitors the flow rate sensor 68 and drives the pump 66 during the cutting process to cool the machining tool 26 and the workpiece 200 at a predetermined flow rate from the injection unit (not shown). Spray liquid.

  When the determination unit 38 determines that the liquid has contacted the sensors 60 and 72, the control unit 32 stops all the operations related to the cutting process and is provided at a position where the operator can visually recognize, for example. The LED lamp (not shown) is flashed to warn the operator.

Note that such warnings are not limited to visual warnings such as LED lamps (not shown). For example, a warning sound is generated by providing a speaker (not shown) in the processing apparatus 10. Or an audible alarm such as a voice guidance indicating that the emergency stop has occurred due to coolant leakage.

The storage unit 34 stores processing data and various types of information such as a predetermined threshold for determining whether or not the liquid has contacted the sensors 60 and 72 by the determination unit 38. The predetermined threshold is, for example, an experimentally determined value, and the work for measuring the potential when the coolant is brought into contact with the sensors 60 and 72 in advance is performed a plurality of times. Let the value be a predetermined threshold.

The potential detector 36 monitors the change in potential measured by the sensors 60 and 72, and acquires the changed potential when the potential changes.

The determination unit 38 determines whether or not the potential detected by the potential detection unit 36 exceeds a predetermined threshold. If the determination unit 38 determines that the potential exceeds the predetermined threshold, the determination unit 38 determines whether the potential exceeds the predetermined threshold. It is determined that the liquid has come into contact.

  In the above configuration, when the processing apparatus 10 performs a processing process on the workpiece 200, the operator is positioned at the distal end portion (located in the processing space 30) of the rotating member 16-2 in the workpiece holding unit 16. While holding the workpiece 200, machining data is input to the microcomputer 18.

  Thereafter, when the operator performs an operation for instructing the start of the cutting process by an operator (not shown) in the processing apparatus 10, first, the spindle 20 is actuated, and a magazine portion (not shown) provided in the processing space 30 is illustrated. The machining tool 26 housed in (1) is attached to the spindle 20.

  Then, while rotating the machining tool 26 around the Z axis on the spindle 20, based on the inputted machining data, the work holding unit 16 is moved in the Y axis direction, and the spindle 20 is moved in the X axis direction and the Z axis direction. Moving.

  Thereby, the relative positional relationship between the workpiece 200 held by the workpiece holding unit 16 and the machining tool 26 attached to the spindle 20 is changed in three dimensions, and the workpiece 200 is cut by the machining tool 200. Done.

  Furthermore, at this time, based on the input machining data, the rotating member 16-2 in the work holding unit 16 is rotated in the X-axis direction.

  As a result, cutting is performed on the workpiece 200 fixed to the rotating member 16-2 while the machining tool 26 attached to the main shaft 20 is brought into contact with the workpiece 200 at a predetermined angle.

  In this manner, in the machining apparatus 10, the relative positional relationship between the workpiece 200 and the machining tool 26 is changed in three dimensions based on the machining data under the control of the control unit 32 in the microcomputer 18, and the workpiece A cutting process is performed on the workpiece 200 by the processing tool 26 while adjusting the angle at which the processing tool 26 abuts on the workpiece 200.

During the cutting process on the workpiece 200 by the machining tool 26, the coolant liquid is injected from the injection unit (not shown) to the processing tool 26 and the workpiece 200 with a constant supply amount.

  Here, when the bellows-like member 30a-1 or the bellows-like member 30b-1 is damaged due to some cause (for example, aged deterioration) during the cutting process by the processing tool 26 on the workpiece 200, the moving member 40, The coolant liquid injected during the cutting process enters the space S in which 50 is disposed.

  The coolant liquid that has entered enters the joint portion between the base member 100a and the back surface 100b through the wall surface in the space S and the like.

  When the coolant liquid collects at the junction between the base member 100a and the back surface 100b in this way, the potential detection unit 36 of the microcomputer 18 detects a change in potential via the sensor 60, and acquires the changed potential.

  Thereafter, the determination unit 38 of the microcomputer 18 determines whether or not the acquired electric potential exceeds a predetermined threshold value. If it is determined that the electric potential exceeds the predetermined threshold value, the coolant is brought into contact with the sensor 60. It is determined that

  When the determination unit 38 determines that the coolant is in contact with the sensor 60, the control unit 32 drives the pump 66, injects the coolant from the injection unit (not shown), and moves the member. All the operations related to the cutting process such as movement of the carriage in 40 and 50, rotation of the rotating member 16-2, rotation of the processing tool 26 in the main shaft 20 are stopped.

  Further, the control unit 32 performs a process for warning the operator that the cutting process has been urgently stopped because the leakage of the coolant liquid outside the processing space 30 has been detected.

Specifically, when a warning LED lamp (not shown) is provided, the LED lamp blinks or when a speaker (not shown) is provided. A voice guidance to the effect that the emergency stop has occurred due to the sound or leakage of coolant is made.

  Further, during the cutting process by the processing tool 26 on the workpiece 200, the tube 62, 64, the connection part of the tube 62 or the connection part of the tube 64 is damaged, or the connection part of the connection part by the operator is not connected. When a liquid leak occurs from the connection part of 64 or the tubes 62 and 64, the coolant liquid leaking into the bowl-shaped member 70 is collected.

  The coolant liquid collected on the bowl-shaped member 70 is collected on the left side end portion 70 a by the inclination of the bowl-shaped member 70.

  When the coolant liquid collects at the left side end portion 70a in this way, the potential detection unit 36 of the microcomputer 18 detects a change in potential via the sensor 72, and acquires the changed potential.

  Thereafter, the determination unit 38 of the microcomputer 18 determines whether or not the acquired electric potential exceeds a predetermined threshold value. If it is determined that the electric potential exceeds the predetermined threshold value, the coolant liquid contacts the sensor 72. It is judged that

  When the determination unit 38 determines that the coolant liquid is in contact with the sensor 72, the control unit 32 drives the pump 66, injects the coolant liquid from the injection unit (not shown), and moves the member. All the operations related to the cutting process such as movement of the carriage 40, 50, rotation of the rotating member 16-2, rotation of the machining tool 26 on the spindle are stopped.

  Further, the control unit 32 performs a process for warning the operator that the cutting process has been urgently stopped because the leakage of the coolant liquid outside the processing space 30 has been detected.

Specifically, when a warning LED lamp (not shown) is provided, the LED lamp blinks or when a speaker (not shown) is provided. A voice guidance to the effect that the emergency stop has occurred due to the sound or leakage of coolant is made.

  As described above, the processing apparatus 10 according to the present invention is the lowermost part in the space S in which the moving member 40 for moving the main shaft 20 and the moving apparatus 50 for moving the work holding unit 16 are disposed. The sensor 60 is arranged in the vicinity.

  Further, the processing apparatus 10 according to the present invention includes a tube 62 that connects the tank 24 in which the coolant is stored and the pump 66, a tube 64 that connects the pump 66 and the injection unit (not shown) via the flow rate sensor 68, Below the connection portion P1 between the tube 62 and the pump 66, the connection portion P2 between the tank 24 and the tube 62, the connection portion P3 between the tube 64 and the pump 66, and the connection portions P4 and P5 between the tube 64 and the flow sensor 68. A hook-shaped member 70 is provided. At this time, the bowl-shaped member 70 is disposed in an inclined state so that the left side end portion 70a is positioned on the lower side with respect to the right side end portion 70b.

  The sensor 72 is disposed in the vicinity of the left side end portion 70a of the bowl-shaped member 70.

The potential detection unit 36 of the microcomputer 18 monitors the potentials of the sensors 60 and 72. When the potential changes, the potential after the change is acquired. In the determination unit 38, whether the acquired potential exceeds a predetermined threshold value. If it is determined whether or not the acquired potential exceeds a predetermined threshold value, it is determined that the coolant liquid is in contact with the sensors 60 and 72, and all operations for performing the cutting process in the processing apparatus 10 are performed. Was canceled.

  Thereby, in the processing apparatus 10 according to the present invention, when the bellows-like members 30a-1 and 30b-1 partitioning the space S and the processing space 30 are damaged and the coolant liquid enters the space S, the operator The operation for performing the cutting process can be stopped by detecting the intrusion of the coolant without requiring a determination.

  Further, in the processing apparatus 10 according to the present invention, even if the coolant liquid leaks from the connection portions of the tubes 62 and 64 and the tubes 62 and 64, the leakage of the coolant liquid is detected without requiring judgment by the operator. Thus, the operation for performing the cutting process can be stopped.

  That is, in the processing apparatus 10 according to the present invention, it is possible to quickly detect the leakage of the coolant liquid, and an operator inspects the processing apparatus 10 before a serious problem occurs in a component that dislikes liquid contact. And can be repaired.

Therefore, according to the processing apparatus 10 according to the present invention, it is difficult to cause a malfunction of the constituent members due to the leakage of the coolant liquid.

  The embodiment described above may be modified as shown in the following (1) to (7).

  (1) Although not particularly described in the above-described embodiment, the processing apparatus 10 according to the present invention uses, for example, dental ceramic as the workpiece 200 and forms the dental ceramic into a desired shape. It can be used as a denture processing device.

  (2) In the above-described embodiment, the machining apparatus 10 is attached to the main shaft 20 such that the main shaft 20 moves in the X-axis direction and the Z-axis direction, and the work holding portion 16 moves in the Y-axis direction. The positional relationship between the processed tool 26 and the workpiece 200 held by the workpiece holder 16 is changed in three dimensions, but it is needless to say that the present invention is not limited to this.

  That is, the work holding unit 16 may be fixedly disposed in the machining space 30 so that the main shaft 20 moves in the X-axis direction, the Y-axis direction, and the Z-axis direction. The work holding part 16 may be moved in the X-axis direction, the Y-axis direction and the Z-axis direction, and is attached to the work 200 held by the work holding part 16 and the main shaft 20. If the positional relationship with the processing tool 26 changes three-dimensionally, the spindle 20 and the work holding unit 16 may be moved in any manner.

  (3) In the above-described embodiment, an LED lamp (not shown) is provided, and the control unit 32 blinks the LED lamp to simply notify the operator that an emergency stop has occurred. Of course, the present invention is not limited to this, and two such LED lamps are provided to determine which of the sensors 60 and 72 has detected an emergency stop due to liquid detection. You may make it inform an operator.

  In the above-described embodiment, a speaker (not shown) is provided so as to play a warning sound or voice guidance indicating that an emergency stop has occurred. However, the present invention is not limited to this. The operator may be notified by voice of which of the sensors 60 and 72 detects the liquid.

  (4) In the above-described embodiment, the two sensors, the sensor 60 and the sensor 72, are provided. However, the present invention is not limited to this. Only one of them may be provided.

  (5) In the above-described embodiment, the sensor 60 is disposed in the space S and the sensor 72 is disposed in the vicinity of the tubes 62 and 64. However, the present invention is not limited to this. In addition, a plurality of (for example, three or more) sensors are arranged in all appropriate locations in the processing apparatus 10 (for example, a space where trouble occurs when coolant liquid other than the space S enters). It may be.

  (6) In the above-described embodiment, when the determination unit 38 determines that the coolant liquid has contacted the sensors 60 and 72, the control unit 32 stops all the operations related to the cutting process, and the LED lamp. (Not shown) etc., the operator is notified of the emergency stop, but it is of course not limited to this.

  That is, when the determination unit 38 determines that the coolant liquid has contacted the sensors 60 and 72, the control unit 32 causes the coolant to leak to the operator by an LED lamp (not shown) or the like. You may notify that it was confirmed and may urge a worker to stop cutting processing.

  (7) You may make it combine suitably the embodiment shown above and the modification shown in said (1) thru | or (6).

  The present invention is suitable for use in a processing apparatus that performs a cutting process on a workpiece.

  DESCRIPTION OF SYMBOLS 10 Processing apparatus, 16 Work holding part, 18 Microcomputer, 20 Spindle, 24 Tank, 26 Processing tool, 30 Processing space, 30a-1, 30b-1 Bellows member, 32 Control part, 34 Storage part, 36 Potential detection part 38, determination unit, 40, 50 moving member, 42, 46, 52, 58 motor, 60, 72 sensor, 62, 64 tube, 66 pump, 68 flow sensor, 70 bowl-shaped member, 200 workpiece

Claims (5)

The relative positional relationship between the workpiece and the machining tool is changed in three dimensions, and the workpiece is cut by the machining tool in the first space, and the workpiece and the machining tool are cut during the cutting process. In a processing apparatus for injecting liquid into
A measuring means disposed outside the first space for measuring a potential and causing a change in a measured value when the liquid comes into contact;
Obtaining means for obtaining the potential after the change when the potential measured by the measuring means is changed;
It is determined whether or not the potential acquired by the acquisition unit is a value exceeding a predetermined threshold, and it is determined that the liquid has contacted the measurement unit only when it is determined that the potential has exceeded the predetermined threshold. Determination means to perform,
A processing device comprising: warning means for giving a warning to an operator when the determination means determines that the liquid has contacted the measurement means. The processing apparatus according to claim 1, further comprising:
And a control unit that controls to stop the processing when the determination unit determines that the liquid has contacted the measurement unit. In the processing apparatus of any one of Claim 1 or 2,
The measuring means is independent of the first space, and is a second space in which moving means for moving a work holding portion holding the work and a main shaft for holding the processing tool is disposed. The processing apparatus characterized by being disposed at a substantially lowermost position in the above. In the processing apparatus of any one of Claim 1 or 2,
The measuring means is disposed below the tube through which the liquid is delivered and a connecting portion of the tube, and is inclined so that one end is positioned below the other end. A processing apparatus, wherein the processing apparatus is disposed in the vicinity of the one end of the hooked member. In the processing apparatus according to any one of claims 1, 2, 3, or 4,
The measuring device includes three electrodes at a predetermined interval, and a non-electrode portion is formed between the electrodes.

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