JP6364598B2 - Pressure air measuring device and machine tool system using the same - Google Patents

Description

  This application is a domestic priority claim application based on an application dated October 14, 2014. The present invention is provided on the spindle side of a machine tool in order to clean the flange end surface of the holder part of the machining tool that comes into contact with the spindle when a machining tool such as a drill is mounted on the spindle of the machine tool as an example. The present invention relates to a pressure air measuring device that detects clogging of an air path through which pressure air is blown and a machine tool system using the same.

  In general, a machine tool such as a machining center has a mechanism for holding a machining tool via a member held on the inner peripheral surface of a main shaft, and a mechanism for making the machining tool detachable to perform desired machining. A necessary tool is selected from a magazine in which a plurality of tools to be arranged is selected by an automatic conveyance device, and is mounted on a main shaft to perform processing.

  With the introduction of such automatic tools such as an auto tool changer at the machining center, the automation of machining has progressed dramatically, and the frequency of exchanging machining tools to the spindle has increased significantly. It is very important that the flange end face of the holder that comes into contact with the main shaft during automatic replacement is cleaned with pressure air blown from the main shaft side when the machining tool is replaced, so that there is no adhesion of foreign matter.

  If the pressure air flow path provided in the spindle of such a machine tool is clogged or the pressure air supply source is obstructed, the cleaning will not be performed sufficiently and the spindle and machining tool will not be cleaned. There is a possibility that foreign matter exists in the workpiece, and an error occurs in the holding posture dimension of the machining tool, which affects the machining accuracy.

  Conventionally, patent document 1 is disclosed as what detects this clogging of the main axis flow path of pressure air. There, the pressure or flow rate of the air supplied from the pressure air supply source to the air supply flow path is measured to determine whether or not the machining tool is mounted, and in the state where the taper shank of the tool holder is clamped, the pressure air The pressure or flow rate is measured, and a value with a good wearing state measured in advance is compared to determine whether or not there is a bad mounting.

  On the other hand, there are valves and sealing members in the pressure air supply source and the air supply flow path in the main shaft, and these deteriorations gradually progress, so inspection and maintenance are necessary.

  Furthermore, the main shaft is also provided with a flow path for injecting coolant toward the tool, and clogging of the flow path results in poor machining due to insufficient cooling and lubrication of the cutting tool and work piece, and the coolant flow of this main shaft. The coolant leaks due to wear of the movable seal portion in the road, and there is a possibility that the mechanical components in the main shaft are deteriorated. For this reason, it is also desired to check the state of the coolant flow path.

Japanese Patent No. 4896580

  However, in the machine tool disclosed in Patent Document 1 that detects clogging of the spindle flow path, the air pressure and flow rate are measured on the spindle side. However, there are problems such as cost increase due to complicated mechanisms and complicated maintenance work. In addition, in order to determine the presence or absence of clogging, it is necessary to set a condition for the determination reference value, and fine adjustments such as a delay timing for measuring air pressure and flow rate are required.

  On the other hand, as shown in FIG. 14 to FIG. 16, a pressure air measuring device that has an attachment / detachment portion and is attached to the spindle 100 of a machine tool and visually detects clogging of the spindle flow path is used. Has been. FIG. 14 is a configuration perspective view of a conventional pressure air measurement device and a main shaft, and FIG. 15 is a configuration perspective view schematically showing a conventional pressure air measurement device after measurement of pressure air. . FIG. 16 is a schematic cross-sectional perspective view showing the pressure air measuring device of FIG. 14 cut at the center. The conventional pressure air measuring device has a second flow path 202 in the holder portion 2 at a position corresponding to the main flow path 101 that blows out pressure air provided on the main spindle 100 and is connected to the casing 41. In addition, there is a third flow path 203, and a seventh flow path 207 and an eighth flow path 208 are connected to the third flow path 203, respectively. The cylinder 43 and the piston 43 slidable in the cylinder interior 45 are connected to the seventh flow path 207. The pressure air supplied from the pressure air supply source on the main shaft side to the air flow path is the main shaft flow path 101 on the main shaft 100 side, the second flow path 202 on the pressure air measuring device side, the third flow path 203, and the seventh flow path. It reaches the cylinder interior 45 via the flow path 207, pushes out the slidable piston 43 in the cylinder interior 45, and the state of the flow path can be detected by the movement and distance moved of the piston 43 at that time. The piston 43a is a flow path with a good air flow, and has moved to the end of the cylinder. On the other hand, the pistons 43b and 43c stay on the way, and the air flow path is clogged. Note that the pressure air injected beyond the capacity of the cylinder interior 45 is discharged to the outside through the eighth flow path 208.

  When detecting the state of the flow path such as clogging of the main shaft flow path by such a mechanism, there are variations due to sliding resistance because there are a plurality of slidable pistons and there are cylinders to some extent Because there are many difficulties, such as the need for the length of the pipe, which is easy to bend, that the piston that has been subjected to air injection once does not return stretched, and that frequent cleaning of the flow path, piston and cylinder is necessary, I couldn't use it in an auto tool changer. Therefore, it was necessary to stop the machine tool and confirm the movement of the piston and the amount of movement stroke by visually operating the machine tool.

  The present invention compensates for the above-mentioned drawbacks, and a pressure air measuring device capable of detecting clogging of a flow path in the main shaft of pressure air blown from the main shaft and air leakage of the flow channel in the main shaft, and a tool using the same. The purpose is to obtain a mechanical system.

In order to achieve the above object, a pressure air measurement device according to claim 1 is provided.
A pressure air measuring device that can be attached to and detached from a spindle for measuring a state of pressure air blown from a spindle passage provided on a spindle of a machine tool to which a machining tool can be attached and detached,
A housing which has a measurement space connected to the main shaft flow path to measure the state of pressure air and houses a measurement member related to the measurement of pressure air;
A sensor that constitutes a part of the measurement member, is arranged in the measurement space, converts the state of the pressure air into an electrical signal, and outputs it,
A part of the measurement member, and a control circuit that generates pressure air state information based on an electrical signal output from the sensor and wirelessly transmits the state information ,
The housing has a flow path having one end connected to the main shaft flow path and the other end opened to the outside.
The measurement space is provided at a location branched from the middle of the flow path.

In order to achieve the above object, a pressure air measurement device according to claim 2 is provided.
The pressure air status information is configured to include at least one measured value of the pressure air pressure and flow rate.

In order to achieve the above object, the pressure air measurement device according to claim 3
A power source for supplying power to the sensor and the control circuit includes at least one of a primary battery, a secondary battery, and an electric double layer capacitor,
The control circuit is configured to wirelessly transmit remaining amount information relating to the remaining amount of power.

In order to achieve the above object, a pressure air measuring device according to claim 4 is provided.
A storage unit for storing and storing a unique identification number;
The control circuit is configured to wirelessly transmit the remaining amount information together with the identification number.

In order to achieve the above object, a pressure air measurement device according to claim 5 is provided.
A storage unit for storing and storing a unique identification number;
The control circuit is configured to wirelessly transmit the status information together with the identification number.

In order to achieve the above object, a pressure air measuring device according to claim 6 is provided.
The identification number stored in the storage unit is configured to be rewritable.

A machine tool system according to claim 7 is:
The pressure air measuring device according to claim 1 or 2,
A determination unit that receives state information wirelessly transmitted from the pressure air measurement device, and determines whether to stop the operation of the machine tool based on the received state information;
Command means for issuing a stop command to the machine tool based on the judging means.

A machine tool system according to claim 8 is:
A pressure air measuring device according to claim 3;
Determination means for receiving the remaining amount information wirelessly transmitted from the pressure air measuring device, and determining whether to stop the operation of the machine tool based on the received remaining amount information;
Command means for issuing a stop command to the machine tool based on the judging means.

A machine tool system according to claim 9 is:
The pressure air measuring device according to claim 1 or 2,
And information output means for receiving state information wirelessly transmitted from the pressure air measuring device, converting the received state information, and outputting it by at least one of image, sound and vibration.

A machine tool system according to claim 10 is:
A pressure air measuring device according to claim 3;
And information output means for receiving the remaining amount information wirelessly transmitted from the pressure air measuring device, converting the received remaining amount information, and outputting it by at least one of image, sound and vibration.

A machine tool system according to claim 11 is
The pressure air measuring device according to claim 5 or 6,
Determination means for receiving state information wirelessly transmitted from the pressure air measurement device together with an identification number, and determining whether to stop the operation of the target machine tool based on the received state information and the identification number;
Command means for giving a stop command to the target machine tool based on the judgment means.

A machine tool system according to claim 12 is
A pressure air measuring device according to claim 4 ;
A determination means for receiving the remaining amount information wirelessly transmitted from the pressure air measuring device together with the identification number, and determining whether to stop the operation of the target machine tool based on the received remaining amount information and the identification number;
Command means for giving a stop command to the target machine tool based on the judgment means.

A machine tool system according to claim 13 is provided.
The pressure air measuring device according to claim 5 or 6,
And information output means for receiving the state information wirelessly transmitted from the pressure air measuring device together with the identification number, converting the received state information and the identification number, and outputting at least one of image, sound and vibration Has been.

A machine tool system according to claim 14 is provided.
A pressure air measuring device according to claim 4 ;
Information output means for receiving the remaining amount information wirelessly transmitted from the pressure air measuring device together with the identification number, converting the received remaining amount information and the identification number, and outputting at least one of image, sound and vibration; It consists of

  According to the pressure air measuring apparatus of the first or second aspect of the invention, it has a holder portion that can be mounted on the spindle of the machine tool, and can measure the state of the pressure air blown from the spindle by wireless transmission. Therefore, it can be used by being incorporated in an auto tool changer of a machine tool, and maintenance can be improved.

  According to the pressure air measuring device of the third aspect of the present invention, it is possible to know the timing of power supply replacement and charging from the remaining amount information of the power source of the pressure air measuring device.

  According to the pressure air measuring device of the invention according to claim 4 or 5, since each can be identified even when a plurality of pressure air measuring devices are used, it is possible to correspond to each of a plurality of installed machine tools and maintain. Management is also easy.

  According to the pressure air measuring device of the invention described in claim 6, in addition to the effect of the invention of claim 4 or 5, since the identification number of each pressure air measuring device can be rewritten, the pressure air measuring device The pairing setting with the receiving side at the time of exchanging a failure or the like becomes easy.

  According to the machine tool system of the seventh aspect of the present invention, it is possible to stop the operation of the machine tool by receiving the pressure air status information from the pressure air measuring device, so that the pressure air flow path of the spindle is clogged. It is possible to prevent processing defects caused by the above.

  According to the machine tool system of the invention described in claim 8, when the remaining power amount information of the pressure air measuring device is received from the pressure air measuring device and the remaining power amount of the pressure air measuring device approaches the specified value. Since it is possible to stop the operation of the machine tool based on the timing of machining, replacement work or remeasurement after the measurement is stopped during measurement due to insufficient power remaining in the pressure air measurement device. Loss time can be reduced.

  According to the machine tool system of the invention described in claim 9 or 10, since the received pressure air state information or remaining amount information can be converted into an image, sound or vibration and notified to an administrator or an operator, the machine tool And the state of the pressure air measuring device can be easily known.

  According to the machine tool system of the invention described in claim 11 or 12, since each can be identified even when a plurality of pressure air measuring devices are used, the stop operation is individually performed corresponding to the plurality of machine tools. be able to.

According to the machine tool system of the invention described in claim 13 or 14, since each can be identified even when a plurality of pressure air measuring devices are used, for example, the state of the plurality of machine tools is displayed on one terminal. Etc. can be easily known.

The perspective view which shows the structure of the pressure air measuring apparatus of the 1st Embodiment of this invention. Sectional perspective view which cut | disconnected the pressure air measuring apparatus of the 1st Embodiment of this invention in the center The perspective view which shows the structure of the pressure air measuring apparatus of the 2nd Embodiment of this invention. Sectional perspective view which cut | disconnected the pressure air measuring apparatus of the 2nd Embodiment of this invention in the center The perspective view which shows the structure of the pressure air measuring apparatus of the 3rd Embodiment of this invention. The perspective view which looked at the pressure air measuring device of the 3rd Embodiment of this invention from the holder part side Sectional drawing which cut | disconnected the pressure air measuring apparatus of the 3rd Embodiment of this invention in the center The perspective view which shows the structure of the pressure air measuring apparatus of the 4th Embodiment of this invention. The perspective view which looked at the pressure air measuring device of the 4th Embodiment of this invention from the holder part side Sectional perspective view which cut | disconnected the pressure air measuring apparatus of the 4th Embodiment of this invention in the center The perspective view block diagram of the machine tool system of 1st Embodiment using the pressure air measuring device of this invention The perspective view block diagram of the machine tool system of 2nd Embodiment using the pressure air measuring device of this invention The perspective view block diagram of the machine tool system of 3rd Embodiment using the pressure air measuring device of this invention Configuration perspective view of conventional pressure air measuring device and spindle Schematic configuration perspective view of a conventional pressure air measuring device and spindle Schematic cross-sectional perspective view of a conventional pressure air measurement device attached to the main shaft when pressure air measurement is performed, cut at the center

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a structural perspective view of a pressure air measuring device 1 showing a first embodiment of the present invention, which is a perspective view with a housing 3 removed, showing the inside of the pressure air measuring device 1. .

  The taper shank 2a of the holder portion 2 is drawn into the main shaft 100 as shown in FIG. 14 of the conventional example, and is constrained to the main shaft 100 by two-surface restraint of the taper shank 2a and the flange end surface 2d of the flange 2b. For there. In this embodiment, a two-surface constrained modular taper holder according to JIS B 6065-1 and 2 standards is used, but other holders can be used.

  The flange 2b is integrated with the taper shank 2a, and is provided for selecting and replacing a plurality of machining tools stored in the tool magazine in the machining center auto tool changer according to the desired machining content. The pressure air measuring device 1 of the present invention also has this and is detachable from the main shaft 100. Corresponding to the main shaft flow path 101 of the main shaft 100, there are eight independent air passages penetrating.

  The housing 4 is connected to the flange 2b, has eight air flow paths, and houses measurement members for measuring the state of pressure air, that is, a sensor 5, a wiring member 6, a control circuit board 9, and the like described later. Yes. The housing 4 has a cup shape, for example, and is made of an aluminum alloy A6061 to prevent corrosion due to coolant or the like. In FIG. 2, only two channel cross sections of the eight channels are shown, but all the eight channels have the same shape and are radially formed around the central axis of the cup-shaped housing 4. ing.

  The sensor 5 is inserted into a measurement space 205 provided in the housing 4, measures the state of pressure air in the flow path, for example, pressure, converts this into an electrical signal of analog voltage or current, and outputs it. In this embodiment, an analog atmospheric pressure sensor is used. Since the housing 4 has eight air flow paths, a total of eight sensors 5 are provided for each path. Of course, the sensor 5 may be a sensor that outputs a measured value digitally.

  The wiring member 6 is a substrate for performing input / output wiring of the eight sensors 5, and is fixed inside the housing 4 in an annular shape. The sensor 5 is mounted on this board, and the power supply for driving the sensor 5 and the electrical wiring of the output voltage of the pressure detection are made, and connected to a control circuit board 9 described later by a connector and a cable (not shown). . Therefore, the wiring member 6 ensures the positioning of the sensor 5 and improves the assemblability by combining the wiring. Further, the wiring member 6 may be a flexible wiring board attached on a rigid base material, or may be configured as an extension of the control circuit board 9.

  The power source 7 supplies power to the sensor 5 and the control circuit board 9 by means of electrical connection such as an unillustrated electric cable or conductive metal plate. In the present embodiment, a rechargeable secondary battery is used, which is a nickel metal hydride battery. The type of the power source 7 is appropriately selected in consideration of the driving voltage and power consumption of the sensor 5 and the control circuit board 9 and the continuous use time required for the pressure air measuring device 1. In other words, when the frequency of use of the pressure air measuring device 1 is low, a primary battery such as an alkaline battery is sufficient. When the frequency of use is high and charging in a very short time is required, a lithium ion battery or an electric double layer capacitor is used. Etc. can also be used. In the present embodiment, the power source 7 is inside the casing 4 and the casing 3, but the power source 7 may be configured as a detachable battery pack having a separate exterior.

  The control circuit board 9 is a board on which the control circuit of the pressure air measuring device 1 is mounted. The control circuit board 9 receives an electrical signal of an analog voltage or current output from the sensor 5 and generates pressure air state information based on the electrical signal. This is transmitted to the outside by radio. The pressure air state information includes information based on at least one measurement value of the pressure air pressure and flow rate, and is converted into a format for wireless transmission.

  Depending on the shape of a series of air flow paths from the pressure air source and the size of the air pressure generated by the pressure air source, the difference between the good time and the clogging time may be different when measuring the pressure in the measurement of the pressure air state. In some cases, the air pressure generated by the pressure air generation source may be small, and there may be a large fluctuation in the air pressure.

  When the flow rate is used in the measurement of the pressure air state, the flow rate sensor may be used as the sensor 5, and the pressure air state information may be used. However, the pressure difference between the measured pressure value and the outside air using the pressure sensor as the sensor 5 is acceptable. It is also possible to calculate the flow rate from the above and use it as pressure air status information. In the present embodiment, the control circuit board 9 calculates and processes the average value within a predetermined time from the electrical signal received from the sensor 5, and generates state information. You may perform by the side which receives from the apparatus 1. FIG.

  In this embodiment, 2.4 GHz band radio is used for information transmission to the outside. However, radio transmission in a frequency band such as 5 GHz band and 920 MHz band may be used, or light such as infrared rays may be used. The control circuit board 9 also has a function of sampling the voltage and impedance of the power supply 7 at predetermined time intervals to monitor the remaining amount of the power supply 7 and transmitting the remaining amount information wirelessly. In other words, this remaining amount information only needs to relate to the remaining amount of the power source 7, and based on the received remaining amount information on the external receiving side, a charging or replacement timing is set by a preset threshold value. It may be set information. The calculation related to the remaining amount information may be performed on the receiving side from the pressure air measuring device 1 as with the state information.

  The control circuit board 9 has a storage unit for storing and storing a unique identification number. This unique identification number is different for each pressure air measuring device, and is stored in the storage unit. The storage unit may be in the control circuit board 9 or may be provided separately. This identification number is given to the data stream of the pressure air status information and the remaining amount information, respectively, and transmitted, and the receiving device paired with the target pressure air measuring device 1 is only the target pressure air measuring device 1. Information can be received. Therefore, when a plurality of pressure air measuring devices are used, it is possible to easily know from which pressure air measuring device the data is from this identification number. Of course, the pressure air measuring device 1 to be paired on the receiving device side can be selected.

Furthermore, this identification number may be fixed or rewritable. Rewriting may be performed by connecting a cable to the control circuit board 9 from a personal computer or the like, or may be changed by a dip switch, a push button switch, or the like provided on the control circuit board 9. When the pressure air measuring device is replaced due to failure or maintenance, pairing with the receiving side is required. By rewriting the identification number of the pressure air measuring device to be replaced, the identification number used before Can be used as is.

  The holding plate 10 is fixed to the inner bottom portion of the cup-shaped casing 4 and has a shape extending in the cup cylindrical axis direction, and is held between the power supply 7 and the control circuit board 9 to hold them.

  The casing 3 is a plastic material having a cup shape, and is provided so as to be screwed onto the casing 4 so as to cover the members inside the pressure air measuring device 1. I'm leaning. Since the pressure air measuring device 1 is used in a machine tool such as a machining center, it is an environment where coolant, cutting powder, and the like fall, and airtightness is required to protect the electric circuit and the like from these environments.

  Next, the details of the air flow path of the first embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional perspective view cut at the center of the pressure air measuring device 1 of the present invention, and shows two of the eight channels. The eight channels are all the same shape, and are formed radially about the central axis of the cup-shaped housing 4.

  The flange end surface 2d is a surface that comes into contact with the main shaft 100, and as described above, it is important that a portion equivalent to this surface of the machining tool is kept free of foreign matter or the like.

  Starting from the flange end surface 2d, the second flow path 202 is provided in the axial direction so as to be connected to each of the eight main flow paths 101. In the present embodiment, the second flow path 202 has a circular shape with a cross section of 2 mm in diameter, and the starting point is tapered.

  The second flow path 202 and the third flow path 203 are continuously connected to the holder portion 2 and the housing 4, respectively, and the boundary portion is hermetically sealed by the O-ring 11. The third channel 203 is also circular with a cross section of 2 mm in diameter.

  The fourth flow path 204 is bent perpendicularly from the third flow path 203 and is provided in the radial direction of the housing 4. In the present embodiment, the cross section is a circle having a diameter of 1.45 mm.

  The measurement space 205 is vertically branched from the fourth flow path 204 and is provided in the axial direction of the housing 4. The sensor 5 is placed in the flow path, and its cross section is a circle having a diameter of 3 mm. Yes.

  The sixth flow path 206 is connected to the fourth flow path 204 and is further extended in the radial direction. The cross section is circular with a diameter of 2.5 mm.

  The diameter dimensions of the respective flow paths described above are values in the present embodiment, and these values are optimally determined depending on the shape of the spindle flow path 101 of the machining center, the set pressure of the pressure air to be blown out, and the like.

  FIG. 3 is an external perspective view of a pressure air measuring device showing a second embodiment of the present invention. FIG. 4 is a cross-sectional view of the pressure air measuring device 1 showing a second embodiment of the present invention cut at the center. Since the basic configuration of the second embodiment of the present invention is the same as that of the first embodiment, only the differences will be described.

  In the second embodiment, the diameter of the cylindrical cup-shaped casing 4 is larger than that of the first embodiment. On the other hand, the length in the axial direction is shortened, and is appropriately determined depending on the specifications of the machine tool to be used. Is to be selected.

  As shown in FIG. 4, the second flow path 202 of the holder portion 2 and the third flow path 203 of the housing 4 are connected via the connecting member 13, and the third flow path of the housing 4 is connected. A measurement space 205 is branched from 203. The pressure air is finally discharged to the outside through the sixth flow path 206. The third flow path 203 is linear and has a flow path shape that changes direction and goes obliquely with respect to the axial direction. The connection member 13 is a disk-shaped plate made of an elastic body such as rubber, and is provided with a hole for connecting the second flow path 202 of the holder portion 2 and the third flow path 203 of the housing 4. Therefore, the connection member 13 which is an elastic body serves as a packing, and the airtightness of each flow path of the holder portion 2 and the housing 4 is maintained. In the second embodiment, a series of flow paths that communicate with the flange 2b and the connection member 13 are used as the second flow paths 202.

  The housing 3 is fastened and fixed to the housing 4 via an O-ring 8 to form a sealed space. The sensor 5, the wiring member 6, the power source 7, the control circuit board 9, and the like are housed in a space closed by the housing 3 and the housing 4. The sensor 5 is mounted on a wiring member 6, and the wiring member 6 is connected to the control circuit board 9 by a connector or an electric cable. In particular, in the pressure air measuring apparatus 1 of the second embodiment, the power source 7 is arranged to be shortened in the axial direction in order to shorten the axial length, and the board surface on which the electric and electronic components of the control circuit board 9 are mounted is a housing. The body 4 is disposed so as to be substantially parallel to a plane perpendicular to the cylindrical axis.

  FIG. 5 is an external perspective view of the pressure air measuring device according to the third embodiment of the present invention, and shows the relationship with the main shaft 100. FIG. 6 is an external perspective view of the pressure air measuring device 1 according to the third embodiment of the present invention. FIG. 7 is a cross-sectional view of the pressure air measuring device 1 according to the third embodiment of the present invention cut at the center. Since the basic configuration of the third embodiment of the present invention is the same as that of the first and second embodiments, only the differences will be described.

  In the third embodiment, the main shaft channel 101 is provided obliquely corresponding to the tapered portion of the tapered shank 2a, and pressure air is blown out to the vicinity of the tapered shank 2a and the flange end surface 2d. This is due to variations in the specifications of the spindle 100 of the machine tool. The flange end member 2c is a member made of an elastic body used for an airtight seal or the like, and forms a starting point portion of a second flow path 202 connected to the main shaft flow path 101 when attached to the main shaft 100. Thus, a shape that covers a part of the taper shank 2a is formed. Since the flange end member 2c is screwed, the flange end member 2c can be easily replaced, and variations of the flange end member can immediately cope with machine tools having main shaft flow paths at various positions.

  8 to 10 show a pressure air measuring device according to a fourth embodiment of the present invention. FIG. 8 is an external perspective view of the pressure air measuring device 1 and shows the inside through the housing 4. FIG. 9 is a view of the pressure air measuring device 1 according to the fourth embodiment of the present invention as viewed from the front end direction of the holder portion 2. FIG. 10 is a cross-sectional perspective view of the pressure air measuring device 1 according to the fourth embodiment of the present invention cut at the center. Since the basic configuration of the fourth embodiment of the present invention is the same as that of the first to third embodiments, only the differences will be described.

  In the fourth embodiment of the present invention, the pressure air outlet on the main shaft side is inside the tapered shank 2a, and this is normally the outlet for the coolant. The pressure air measuring device 1 according to the fourth embodiment is configured so that a seal leak check can be performed on the coolant flow path. This check is performed by inputting pressure air instead of the coolant to the coolant flow path. Is called. Therefore, in the fourth embodiment, the flange end member 2c does not have a flow path, and serves as a seal that keeps the main shaft 100 and the pressure air measuring device 1 in close contact with each other to keep airtightness. Then, the second flow path 202 is connected to the pressure air outlet on the main shaft side and is provided inside the taper shank 2a. The second flow path 202 is connected to the measurement space 205 via the third flow path 203 of the housing 4, and is connected to the measurement space 205. The state of pressure air can be measured by the inserted sensor 5.

  Since the fourth embodiment is a configuration for detecting leakage of a valve, a seal member, or the like provided in a flow path through which pressure air passes in the main shaft 100, pressure is applied as in the first to third embodiments. There is no sixth channel 206 serving as an air outlet. Therefore, when the pressure air is blown out from the pressure air outlet of the main shaft 100, the pressure in the measurement space 205 gradually increases and reaches the vicinity of the pressure defined by the pressure air supply source. After reaching the vicinity of the specified pressure, the pressure air supply is stopped, the valve is closed and sealed, and the pressure value is monitored by the sensor 5 placed in the measurement space 205. If the pressure does not reach the specified pressure or if the pressure drop occurs immediately, there is a possibility that the seal member is deteriorated or abnormal, and this can be immediately known.

  Further, the check can be easily realized in the first to third embodiments by using the method of detecting leakage of the valve on the main shaft 100 side and the seal member shown in the fourth embodiment. That is, by inserting a member such as a screw-type stopper with a seal into the opening of the sixth flow path 206 and closing the sixth flow path 206, air leakage confirmation of the pressure air flow path in the main shaft 100 is performed. Is possible.

  The first to fourth embodiments are examples, and in the machine tool in which the main shaft flow path 101 is formed inside the main shaft 100, flow paths corresponding to various main shaft flow paths are formed in the holder portion 2. It is easy to configure the same pressure air measuring device, and it is obvious that the same effect can be obtained. Further, unlike the holder that supports the machining tool, the holder portion 2 of the pressure air measuring device 1 does not require high dimensional accuracy and high rigidity, and the second flow path 202 leaks from the spindle flow path 101. Since it is only necessary to be held on the main shaft 100 so as to be connected, there is a high degree of freedom in shape, which is advantageous in terms of cost.

  The pressure air measuring device 1 according to the present invention described above is mounted on a tool magazine of an automatic tool changer of a machining center, and the pressure air measuring device 1 is selected at an arbitrary timing and mounted on a spindle 100 by machining center programming. The pressure air is blown out and pressure air state information indicating the state of the pressure air is received from the pressure air measuring device 1 to obtain clogging or leakage of the flow path on the main shaft side.

  FIG. 11 is a perspective configuration diagram of a first embodiment of a machine tool system using the pressure air measurement device of the present invention. The pressure air measuring device 1 is in the machining area of the machine tool 500 and wirelessly transmits the pressure air state information blown out from the spindle 100 as described above. The personal computer 503 has receiving means for receiving the pressure air state information. Based on the received pressure air state information, a judgment means for judging whether or not to stop the operation of the machine tool, and the machine tool 500 using the judgment means. Command means for commanding the control unit 502 to stop.

  Similarly, the personal computer 503 also receives the remaining amount information of the power supply 7 and determines whether or not to stop the operation of the machine tool, and instructs the controller 502 of the machine tool 500 to stop using this determination means. Command means for Furthermore, the personal computer 503 is also an information output means that can display a warning as an image on the screen or emit a warning sound. The control unit 502 of the machine tool 500 receives and executes a machine tool stop command from the personal computer 503, converts at least one of pressure air state information and remaining amount information into an image signal and a sound signal, A warning can be issued by displaying an image on the screen 501 or generating a warning sound. As the warning sound, a predetermined sound can be appropriately selected depending on the content of the warning.

  Further, when a plurality of machine tools are installed side by side, pairing between the pressure air measuring device and the receiving means is necessary. In this case, a unique identification number of the pressure air measuring device is transmitted after being added to the pressure air status information or remaining amount information, and the receiving means indicates which pressure air measuring device is the data transmitted from this identification number. Specific recognition.

  FIG. 12 is a perspective configuration diagram of a second embodiment of a machine tool system using the pressure air measurement device of the present invention. The second embodiment is a modification of the first embodiment, and the control unit 502 incorporates what functions as the personal computer 503 of the first embodiment. Therefore, the control unit 502 of the machine tool 500 receives the pressure air state information of the main spindle 100 and the remaining amount information of the power source 7 from the direct pressure air measuring device 1 to make a stop determination of the machine tool 500, and issues a stop command by this determination. The pressure air status information and the remaining amount information of the power source 7 are converted into an image signal and a sound signal, and an image is displayed on the operation screen 501 or a warning sound is emitted to issue a warning. Can do.

  FIG. 13 is a perspective configuration diagram of a third embodiment of a machine tool system using the pressure air measurement device of the present invention. The third embodiment is a modification of the second embodiment, and the portable terminal 504 receives the pressure air state information of the main shaft 100 and the remaining amount information of the power source 7 from the pressure air measuring device 1 simultaneously with the control unit 502. Can output warnings. The portable terminal 504 can be carried and can be always carried by an administrator and an operator. Since the unique identification number of the pressure air measuring device is added to the pressure air status information or remaining amount information and transmitted wirelessly, the portable terminal 504 can receive wireless signals from a plurality of pressure air measuring devices and Even when a plurality of machines are installed side by side, the pressure air status information of each pressure air measuring device and the remaining amount information of the power source 7 can be easily monitored by switching the operation switch of the portable terminal 504, respectively. Of course, in addition to displaying an image on the screen, a warning sound is generated, or the portable terminal 504 is vibrated by vibration generating means such as a motor built in the portable terminal 504, so that the administrator and the operator are careful. Can be encouraged. The identification number of each pressure air measuring device may be fixed or rewritable, and the setting of the portable terminal 504 is also possible when an alternative product is used due to maintenance or failure of the pressure air measuring device. It is possible to easily replace the pressure air measuring device by changing.

  Therefore, it is not necessary to stop the machine tool at the time of confirmation and manually attach the pressure air measuring device to confirm visually, and the loss time due to the artificial confirmation work can be reduced. In addition, it is possible to prevent a machining tool mounting failure caused by adhesion of foreign matter due to insufficient cleaning due to clogging of the main shaft flow path 101 of the main shaft 100. Further, it is possible to detect a defect or the like of the seal member related to the main shaft flow path 101 of the main shaft 100 and immediately know the abnormality of the main shaft 100, thereby preventing a processing trouble caused by this.

  Moreover, since the pressure air measuring device 1 according to the present invention can be used as long as it is a machine tool corresponding to a holder of the same standard, it is highly versatile and has the advantage that it can be used for other machine tools of the same standard. is there. Also, a machine tool compatible with a holder of a different standard can be used by matching the housing and the flow path and exchanging it with a corresponding holder part, so that it has excellent versatility.

  As an application example of the present invention, it can be applied as a maintenance tool of a machine tool such as a machining center.

DESCRIPTION OF SYMBOLS 1 Pressure air measuring apparatus 2 Holder part 2a Tapered shank 2b Flange 2c Flange end member 2d Flange end surface 3 Case 4 Case 5 Sensor 6 Wiring member 7 Power supply 8 O-ring 9 Control circuit board 10 Holding plate 11 O-ring 13 Connection member 41 Housing 42 Cylinders 43, 43 a, 43 b, 43 c Piston 44 O-ring 45 Cylinder inside 100 Spindle 101 Spindle flow path 202 Second flow path 203 Third flow path 204 Fourth flow path 205 Measurement space 206 Sixth flow Path 207 Seventh channel 208 Eight channel 500 Machine tool 501 Operation screen 502 Control unit 503 Personal computer 504 Portable terminal

Claims (14)

A pressure air measuring device detachably attached to the spindle for measuring a state of pressure air blown from a spindle flow path provided on a spindle of a machine tool to which a machining tool can be attached and detached,
A housing that is connected to the main shaft flow path and has a measurement space for measuring the state of the pressure air, and houses a measurement member related to the measurement of the pressure air;
A sensor that constitutes a part of the measurement member, is arranged in the measurement space, and converts the state of the pressure air into an electric signal and outputs the electric signal;
A part of the measurement member, and a control circuit that generates state information of the pressure air based on the electrical signal output from the sensor and wirelessly transmits the state information,
The housing has a flow path having one end connected to the main shaft flow path and the other end opened to the outside.
The pressure air measurement device, wherein the measurement space is provided at a location branched from the middle of the flow path.   The pressure air measurement device according to claim 1, wherein the state information of the pressure air includes at least one measurement value of a pressure and a flow rate of the pressure air. A power source for supplying power to the sensor and the control circuit includes at least one of a primary battery, a secondary battery, and an electric double layer capacitor,
The pressure air measurement device according to claim 1, wherein the control circuit wirelessly transmits remaining amount information relating to the remaining amount of the power source. A storage unit for storing and storing a unique identification number;
The pressure air measuring device according to claim 3, wherein the control circuit wirelessly transmits the remaining amount information together with the identification number. A storage unit for storing and storing a unique identification number;
The pressure air measuring device according to any one of claims 1 to 3, wherein the control circuit wirelessly transmits the state information together with the identification number.   6. The pressure air measurement device according to claim 4, wherein the identification number stored in the storage unit is rewritable. The pressure air measuring device according to claim 1 or 2,
A determination unit that receives the state information wirelessly transmitted from the pressure air measurement device, and determines whether to stop the operation of the machine tool based on the received state information;
Commanding means for issuing a stop command to the machine tool based on the determination means. A pressure air measuring device according to claim 3;
Determination means for receiving the remaining amount information wirelessly transmitted from the pressure air measuring device, and determining whether to stop the operation of the machine tool based on the received remaining amount information;
Commanding means for issuing a stop command to the machine tool based on the determination means. The pressure air measuring device according to claim 1 or 2,
Information output means for receiving the state information wirelessly transmitted from the pressure air measuring device, converting the received state information, and outputting it by at least one of an image, sound and vibration. A machine tool system. The pressure air measuring device according to claim 3,
Information output means for receiving the remaining amount information wirelessly transmitted from the pressure air measuring device, converting the received remaining amount information, and outputting at least one of an image, sound and vibration. Machine tool system characterized by The pressure air measuring device according to claim 5 or 6,
The status information wirelessly transmitted from the pressure air measuring device is received together with the identification number, and it is determined whether or not to stop the operation of the target machine tool based on the received status information and the identification number. Judgment means,
Commanding means for issuing a stop command to the target machine tool based on the determination means. A pressure air measuring device according to claim 4 ;
Whether the remaining amount information wirelessly transmitted from the pressure air measuring device is received together with the identification number, and whether to stop the operation of the target machine tool based on the received remaining amount information and the identification number. A judging means for judging;
Commanding means for issuing a stop command to the target machine tool based on the determination means. The pressure air measuring device according to claim 5 or 6,
Information output for receiving the state information wirelessly transmitted from the pressure air measuring device together with the identification number, converting the received state information and the identification number, and outputting the state information by at least one of image, sound and vibration And a machine tool system. The pressure air measurement device according to claim 4 ,
The remaining amount information wirelessly transmitted from the pressure air measuring device is received together with the identification number, and the received remaining amount information and the identification number are converted and output as at least one of image, sound and vibration. A machine tool system comprising: an information output unit;