JP2016135533A - Pressure air measurement unit, pressure air measurement device, and machining tool system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure air measurement device that detects clogging of an air path which blows out pressure air provided in a main shaft in order to clean an attachment/detachment part of a processing tool which can be attached to and detached from the main shaft of a machining tool, which can prevent chips and the like from being accumulated in a flow path for measuring the pressure air and make the cleaning easy.SOLUTION: The pressure air measurement device has a holder unit that can be attached to and detached from a main shaft of a machining tool, in which there are consecutively provided second and third flow paths starting at a flange end face of the holder unit corresponding to a first flow path that blows out pressure air provided in the main shaft of the machining tool and is provided a fourth flow path joined to the third flow path and opened to the outside. In a measurement space branched in a vertical direction from the third flow path, the pressure air is measured. The device is structured so as to prevent mist of coolant and chips of a work-piece and the like from being accumulated in the flow path by arranging the third flow path and the fourth flow path linearly in series, and allows each flow path to be easily cleaned.SELECTED DRAWING: Figure 2

Description

  This application is a domestic priority claim application based on an application dated January 15, 2015. As an example, the present invention provides a machine tool main shaft side for cleaning a flange end surface portion of a detachable portion that comes into contact with the main shaft when a machining tool including a member for holding a drill or the like is mounted on the main shaft of the machine tool. The present invention relates to a pressure air measurement unit, a pressure air measurement device, and a machine tool system using the pressure air measurement unit that detect clogging of an air path that is provided in the air and blows out pressure air.

  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 spindle, and the machining tool is provided with an attachment / detachment portion that can be attached and detached. A required tool is selected by an automatic transfer device from a magazine in which a plurality of tools for processing are arranged, and is mounted on the main shaft for 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 end face of the flange 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 for detachment is clamped, The pressure or flow rate of air is measured, and the presence or absence of a mounting failure is determined by comparing the value with a good mounting state measured in advance.

Japanese Patent No. 4896580

  However, in the case of detecting clogging of the flow path of the pressure air provided on the spindle of the machine tool disclosed in Patent Document 1, the state of the pressure can be constantly monitored because the measurement of the air pressure and flow rate is performed on the spindle side. However, since the structure is complicated and an auxiliary device that is not the purpose of the original processing is attached, there are problems such as cost increase due to a complicated mechanism 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 FIGS. 10, 11, and 12, a pressure that is attached to the spindle 100 of the machine tool and is visually detected for clogging of the flow path of the pressure air, similarly to the machining tool. Air measuring devices are known and used. FIG. 10 is a structural perspective view of a conventional pressure air measuring device and a main shaft, and FIG. 11 is a structural perspective view schematically showing a conventional pressure air measuring device after measuring pressure air. . FIG. 12 is a schematic cross-sectional perspective view showing the pressure air measuring device of FIG. 10 cut at the center. The conventional pressure air measuring device has a second flow path 202 in the holder unit 2 at a position corresponding to the first flow path 101 for blowing out pressure air provided on the main shaft 100, and is connected to the housing. The body 41 also has a third flow path 203, and is connected to the fourth flow path 204 and the sixth flow path 206. A cylinder 43 and a piston 43 slidable in the cylinder interior 45 are connected to the sixth flow path 206. The pressure air supplied from the pressure air supply source on the main shaft side to the air flow path is the first 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, 6 reaches the cylinder interior 45 through the flow path 206, pushes out the slidable piston 43 in the cylinder interior 45, and the state of the flow path can be detected by the movement of the piston 43 and the distance moved. 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 fourth flow path 204.

  In a pressure air measuring device that detects a clogging of the main shaft flow path by such a mechanism, when coolant or workpiece chips enter the flow path in the housing 41, the flow that opens to the outside Since the path is provided perpendicular to the flow path provided in the axial direction from the main shaft, it is easy to deposit, and when it accumulates, the removal of the cylinder 42 is not easy because the cylinder 42 is removed. was there.

  The present invention compensates for the above-mentioned drawbacks, and reduces the accumulation of coolant, chips of workpieces and the like in the flow path of the casing, and facilitates cleaning, and a pressure air measurement unit and a pressure air measurement device, The object is to obtain a machine tool system using them.

In order to achieve the above object, the pressure air measurement unit according to claim 1
A pressure air measuring unit for measuring a state of pressure air blown from a first flow path provided on a spindle of a machine tool to which a machining tool can be attached and detached,
A measuring member for measuring the state of pressure air, which can be detachably connected to a holder unit having a second flow path connected to the first flow path, having a flange end face portion detachably contacting the main shaft A linear third channel that is connected to the second channel, and a linear channel that is connected in series and linearly to the third channel and opens to the outside. A housing provided with a fourth flow path and a measurement space provided connected to the third flow path;
A sensor that constitutes a part of the measurement member and is arranged in the measurement space, converts the state of the pressure air into an electrical signal, and outputs it,
A control circuit that forms part of the measurement member and generates pressure air state information based on an electrical signal output from the sensor.

In order to achieve the above object, a pressure air measurement unit according to claim 2 is provided.
The state information is configured by including at least one measurement value of the pressure and the flow rate of the pressure air.

In order to achieve the above object, the pressure air measurement device according to claim 3
A pressure air measuring device detachably attached to the main shaft for measuring a state of pressure air blown from a first flow path provided on the main shaft of the machine tool to which the processing tool is detachable,
A holder unit comprising: a flange end surface portion detachably contacting the main shaft; and a second flow path connected to the first flow path.
A third linear flow path that is connected to the holder unit in a separable manner, accommodates a measurement member for measuring pressure air, and is connected to the second flow path; A case comprising: a linear fourth flow path provided in series and linearly connected to the path so as to open to the outside; and a measurement space provided connected to the third flow path. ,
A sensor that constitutes a part of the measurement member and is arranged in the measurement space, converts the state of the pressure air into an electrical signal, and outputs it,
And a control circuit that forms part of the measurement member and generates pressure air state information based on an electrical signal output from the sensor.

In order to achieve the above object, a pressure air measuring device according to claim 4 is provided.
The state information is configured by including at least one measurement value of the pressure and the flow rate of the pressure air.

A machine tool system according to claim 5 is:
A machine tool provided with a first flow path in the main shaft for blowing out pressure air to an attachment / detachment portion of a machining tool removably attached to the main shaft;
And a pressure air measuring device according to claim 3 or 4 attached to the main shaft.

  According to the pressure air measurement unit of the first aspect of the present invention, since the flow path of the pressure air in the pressure air measurement unit is provided in a straight line, coolant and workpiece chips are difficult to accumulate, so that the long time Operation is possible, and maintenance time can be shortened because cleaning is easy even if it is deposited.

  According to the pressure air measurement unit of the second aspect of the invention, in addition to the above effects, the pressure air state information is based on at least one measurement value of the pressure air pressure and flow rate. It can cope with the source and its fluctuation.

  According to the pressure air measuring device of the invention described in claim 3, the holder unit is separable, and after separation, the pressure air flow paths of both the holder unit and the pressure air measuring unit are linearly provided. Therefore, it is difficult for coolant and workpiece chips to accumulate, and operation for a long period of time is possible, and even if it accumulates, cleaning is easy and maintenance time can be shortened.

  According to the pressure air measurement device of the invention described in claim 4, in addition to the above effects, the pressure air state information is based on at least one measurement value of the pressure air pressure and flow rate. It can cope with the source and its fluctuation.

  According to the machine tool system of the fifth aspect of the present invention, it is possible to realize a machine tool system that can be continuously operated for a long time, is easy to maintain, and has high production efficiency.

The perspective view which shows the external appearance of the pressure air measuring apparatus containing the pressure air measurement of the 1st Embodiment of this invention Sectional drawing which cut | disconnected the pressure air measuring apparatus of the 1st Embodiment of this invention in the center 1 is a perspective external view of a pressure air measurement unit, a connecting member, and a holder unit constituting the pressure air measurement device according to the first embodiment of the present invention. Sectional drawing which cut | disconnected the pressure air measuring apparatus of the 2nd Embodiment of this invention in the center The perspective external view of the pressure air measurement unit, the connection member, and the holder unit which constitute the pressure air measurement device of the second embodiment of the present invention Sectional drawing which cut | disconnected the pressure air measuring apparatus of the 3rd Embodiment of this invention in the center The perspective external view of the pressure air measurement unit, the connection member, and the holder unit which constitute the pressure air measurement device of the third embodiment of the present invention The perspective block diagram of 1st Embodiment of the machine tool system using the pressure air measuring apparatus of this invention The perspective view block diagram of 2nd Embodiment of the machine tool system using the pressure air measuring apparatus of this invention Configuration perspective view of conventional pressure air measuring device and spindle Configuration perspective view of conventional pressure air measuring device and spindle Cross-sectional perspective view of a conventional pressure air measuring device cut at the center when pressure detection is performed by attaching to the main shaft

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

  FIG. 1 is an external perspective view of a pressure air measuring device 1 including a pressure air measuring unit 16 showing a first embodiment of the present invention. The pressure air measuring device 1 is a device for detecting clogging of a flow path on the main shaft side that exists for blowing out pressure air for cleaning from the main shaft side of the machine tool to the attaching / detaching portion of the machining tool.

  The tapered shank 2a is drawn into the main shaft 100 as shown in FIG. 7 of the conventional example, and is constrained to the main shaft 100 by the two-surface constraint of the tapered surface of the tapered shank 2a and the flange end surface portion 2c (see FIG. 2) of the flange 2b. Is done. In the present embodiment, the two-surface constrained modular taper holder portion according to JIS B 6065-1 and 2 standards is used, but other two-surface constrained holder portions can also be implemented.

  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. Further, it has a pressure air outlet for cleaning the main shaft, that is, an air flow path corresponding to the first flow path 101. Details of the air flow path will be described later.

  The holder unit 2 is constituted by a taper shank 2a and a flange 2b, and the pressure air measuring device 1 can be attached to and detached from the spindle of the machine tool via the holder unit 2 similar to the attaching / detaching portion of the machining tool.

  The cover case 3 has a disk shape and is provided so as to cover the member inside the pressure air measuring device 1 together with the housing 4, and the airtightness is maintained by the O-ring 8. Since the pressure air measuring device 1 is used in a machine tool such as a machining center, it is an environment in which coolant, swarf and the like are scattered, and it is necessary to maintain airtightness for protecting an electric circuit and the like from these.

  Next, a first embodiment of the pressure air measuring device 1 including the pressure air measuring unit 16 of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of the pressure air measuring device 1 cut at the center.

  The housing 4 is connected to the flange 2b via the connection member 13a, has 10 air flow paths, and is a measurement member for measuring the state of pressure air, that is, a sensor 5 and a wiring board 6 described later. A circuit board 9 and the like are accommodated. 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, two channel cross sections are shown among ten channels. In addition, all of the 10 channels have the same shape and are radially formed around the central axis of the cup-shaped housing 4.

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

  Starting from the flange end face 2c, the second flow path 202 is provided in the axial direction so as to be connected to each of the ten first flow paths 101 of the main shaft 100 as shown in FIG. The second flow path 202 is linear and is provided therethrough.

  The second flow path 202 and the third flow path 203 are continuously connected to the holder unit 2 and the casing 4, respectively, and the connection member 13a is located between the holder unit 2 and the casing 4, and the second flow path 202 and the third flow path 203 are connected, and at the same time, sandwiched between both the holder unit 2 and the housing 4 so that the boundary is hermetically sealed. The connecting member 13a is an elastic body such as rubber and is a disk-shaped plate. Details of the connecting member 13a will be described later. In the present embodiment, 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 measurement space 205 is connected to the third flow path 203 and provided in the axial direction of the housing 4, and the sensors 5 are respectively placed in the measurement space 205.

  The fourth flow path 204 is connected to the third flow path 203, further extends in the direction of the extension of the third flow path 203, and is provided to open to the outside in a straight line shape. Therefore, the third flow path 203 and the fourth flow path 204 are linearly arranged in series.

  The sensor 5 is arranged in a measurement space 205 provided in the housing 4, measures the state of pressure air in the space, for example, pressure, converts it into an electrical signal, and outputs it. In the present embodiment, the sensor 5 uses an analog barometric pressure sensor. Of course, the sensor 5 may be a sensor that outputs a measured value digitally. Since the housing 4 has ten air flow paths, a total of ten sensors 5 are provided for each path.

  The wiring board 6 is a board for performing input / output wiring of ten sensors 5, and is individually fixed inside the housing 4. The sensor 5 is mounted on this board, the power supply for driving the sensor 5 and the electrical wiring of the output voltage related to the measured value are made, and connected to a control circuit board 9 described later by a connector and a cable (not shown). Yes. Moreover, the wiring board 6 may be a flexible wiring board affixed on a rigid base material, and the connection wiring part with the control circuit board 9 may be constituted by an extension part of this flexible wiring board. Further, identification information detection means 17a is mounted on the wiring board 6. This identification information detection means 17a is a switch having, for example, a linearly moving contact, and has a variation and identifies a connection member having identification information.

  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 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, and 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 Etc. can also be used. In the present embodiment, the power source 7 is inside the casing 4 and the cover case 3, but the power source 7 may be configured to be detachable as a battery pack with 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 and flow rate of the pressure air and is converted into a format for wireless transmission. The control circuit of the pressure air measuring device 1 is composed of a circuit including the control circuit board 9, the wiring board 6, the sensor 5, and the identification information detecting means 17a.

  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 variation in the air pressure. In this case, it is preferable to detect using the flow rate of the pressure air.

  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. 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 in the side which receives the information transmitted from the apparatus 1.

  In the present embodiment, the light emitting element 15 is provided and wireless communication using infrared rays is used. However, wireless communication using other light beams may be used, and a frequency of 2.4 GHz band, 5 GHz band, 920 MHz band, or the like may be used. Electrical wireless communication may be used. The wirelessly transmitted signal is received and demodulated by a dedicated receiver, a personal computer having a receiver, a machine tool having a receiver, or a personal computer having a receiver connected to the machine tool, and the pressure air. Measurements are stored as data. Therefore, with such a configuration, it is possible to set a threshold value for the pressure air measurement value in advance, and to make a warning sound or stop the machine tool if the measured value is below the threshold value. Furthermore, the voltage and impedance of the power supply 7 are sampled at a predetermined time interval to monitor the remaining amount of the power supply 7, and when the remaining amount of the power supply 7 falls below a predetermined value, a warning signal indicating insufficient remaining power is wirelessly transmitted. It also has a function for prompting charging. Details regarding such a machine tool system will be described later.

  The pressure air measurement unit 16 in the present embodiment includes at least the housing 4, the sensor 5, the wiring board 6, the O-ring 8, the control circuit board 9 and the cover case 3, excluding the holder unit 2. ing. However, as described above, the power source 7 may be built in the housing 4 or may be separately attached to the housing 4 and the cover case 3 as a battery pack. Further, since the holder unit 2 and the housing 4 are fastened by bolts 18, the holder unit 2 and the pressure air measuring unit 16 are easily separable.

  In the environment in which the pressure air measurement unit 16 and the pressure air measurement device 1 in this embodiment are used, coolant mist or workpiece chips generated during machining are scattered, and pressure air measurement is performed on the spindle 100. When the apparatus 1 is installed and pressure air for cleaning blows out from the first flow path 101, coolant and swarf are also mixed with the pressure air and enter the pressure air measurement unit 16 and the pressure air measurement apparatus 1. It can happen. Compared with the conventional pressure air measurement unit 16 according to the present embodiment, the flow path of the casing 4 is provided in a straight line and opened to the outside, so that coolant, chips and the like are less likely to accumulate, Even if it accumulates, cleaning is easy.

  Further, in the pressure air measuring device 1 according to the present embodiment, the holder unit 2 and the pressure air measuring unit 16 can be separated, and the flow path of the holder unit 2 is also linear, so that coolant, chips and the like are not easily deposited. Even if coolant, chips, etc. accumulate, the holder unit 2 and the pressure air measuring unit 16 can be separated and cleaned easily.

  FIG. 3 shows the positional relationship between the connection member 13a and the holder unit 2 when there are ten pressure air outlets, that is, ten first flow paths 101 on the main shaft 100 side. 10 holes corresponding to the 10 systems of the second flow paths 202 provided in the holder unit 2 and the positioning pins 14 for positioning the holder unit 2 and the pressure air measuring unit 16 are escaped from the connecting member 13a. A hole and a relief hole for a bolt 18 for fastening the holder unit 2 and the pressure air measurement unit 16 are provided in the center. Therefore, as shown in FIG. 2, the protruding portions of the identification information detecting means 17a and 17b are pushed by the connecting member 13a in both the identification information detecting means 17a and 17b. Here, the state in which the switches serving as the identification information detecting means 17a and 17b are pressed is defined as ON.

  In the state of FIG. 3, the holder unit 2 has ten systems of the second flow paths 202, and the connection member 13 a directly connects this to the ten systems of the third flow paths 203 of the pressure air measurement unit 16. . Accordingly, all ten sensors 5 are to be measured. At this time, the connecting member 13a has a flat shape with no holes or the like as identification information so as to be in an ON state in which both switches of the identification information detecting means 17a and 17b are pressed.

  4 and 5 show a pressure air measuring device 1 according to a second embodiment of the present invention, in which FIG. 4 is a sectional view cut at the center, and FIG. 5 is a holder unit 20 and a pressure air measuring unit 16. FIG. In the second embodiment, the holder unit 20 has eight systems of the second flow paths 202, and the connection member 13 b converts this, and eight systems out of the ten systems of the pressure air measurement unit 16. To the third flow path 203. That is, two of the ten third flow paths 203 of the pressure air measurement unit 16 are unnecessary, and the connecting member 13b closes the two third flow paths 203. Further, since the phases of the eight second channel 202 of the holder unit 20 and the tenth third channel 203 of the pressure air measuring unit 16 do not match, the connecting member 13b includes an elongated hole 8 including a long hole. Holes are provided.

  As described above, when the number of the second flow paths 202 of the holder unit 20 is smaller than the number of the sensors 5 corresponding to the ten third flow paths 203 of the pressure air measurement unit 16, any one of the sensors 5 is changed. Must be removed from the measurement target. At this time, which sensor 5 is excluded from the target is selected and specified by a specifying means provided in the control circuit of the control circuit board 9. Therefore, the connection member 13b has identification information regarding the number of the second flow paths 202 of the holder unit 20, the switch of the identification information detection means 17a is OFF, and only the switch of the identification information detection means 17b is ON. In this state, the control circuit can determine that the eight holder units 20 are mounted. That is, the connection member 13b has an identification hole 19a as identification information, and the control circuit detects that the switch is turned off by the switch of the identification information detection means 17a based on the identification information in the connection member 13b. Measurement is performed with only a predetermined sensor 5 as a measurement target.

6 and 7 show a pressure air measuring device 1 according to a third embodiment of the present invention. FIG. 6 is a sectional view cut at the center, and FIG. 7 shows a holder unit 21 and a pressure air measuring unit 16. FIG. In the third embodiment, there are six systems of the second flow paths 202 in the holder unit 21, and the connection member 13 c converts this, and six systems of the ten systems of the pressure air measurement unit 16. To the third flow path 203. That is, four of the ten third flow paths 203 of the pressure air measurement unit 16 are not necessary, and thus the connecting member 13 c closes the four third flow paths 203. Further, since the phases of the six second channel 202 of the holder unit 21 and the tenth third channel 203 of the pressure air measuring unit 16 do not match, the connecting member 13c includes a long hole 6. Holes are provided.

  As described above, in the third embodiment as well, the number of the second flow paths 202 of the holder unit 21 corresponds to the ten third flow paths 203 of the pressure air measurement unit 16 as in the second embodiment. Therefore, it is necessary to remove one of the sensors 5 from the measurement target. Therefore, the connecting member 13c has identification information regarding the number of the second flow paths 202 of the holder unit 21, and when both the switches of the identification information detection means 17a and 17b are turned off, When attached, the control circuit can judge. That is, the connection member 13c has both the identification holes 19a and 19b, and the control circuit detects that the switch is turned off by the switches of the identification information detection means 17a and 17b based on the identification information in the connection member 13b, and is set in advance. Measurement is carried out using only the predetermined sensor 5 as a measurement object.

  The connection members 13a, 13b, and 13c are elastic bodies such as rubber, and keep the airtightness between the second flow path 202 of the holder units 2, 20, and 21 and the third flow path 203 of the housing 4, respectively. In addition, the identification information provided on the connection member may be other than the mechanical information using the above-described holes or the like, and may be an electrical information such as an RFID or an optical information. Further, in the above three embodiments, identification information is provided on the connection member, but it may be provided on the holder unit or on both. By providing both, it becomes possible to prevent the mistake of the combination of a holder unit and a connection member.

  FIG. 8 is a perspective configuration diagram of the first embodiment of the machine tool system using the pressure air measuring device of the present invention. The pressure air measuring device 1 is in the machining area of the machine tool 500, is attached to the main shaft 100, and wirelessly transmits pressure information of the pressure air blown out from the main shaft 100. The personal computer 503 has receiving means for receiving pressure information of pressure air, a judging means for judging whether or not to stop the machine tool from the received pressure air pressure information, and the machine tool 500 by this judging 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 machine tool, and a command for instructing the control unit 502 of the machine tool 500 to stop using this determination means. Have means. Further, a warning can be displayed on the screen of the personal computer 503, and a warning sound can be emitted. The control unit 502 of the machine tool 500 can receive and execute a machine tool stop command from the personal computer 503, and can also issue a warning with the operation screen 501 or a warning sound.

  FIG. 9 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 in the first embodiment. Therefore, the control unit 502 of the machine tool 500 directly receives the pressure air state information of the main spindle 100 and the remaining amount information of the power supply 7 from the pressure air measuring device 1 and determines whether to stop the machine tool 500. Can be issued, and a warning can be issued by the operation screen 501 or a warning sound.

  In the machine tool system according to the present invention, coolant, swarf and the like are unlikely to accumulate in the pressure air measuring device, and cleaning is easy even if temporarily accumulated. Therefore, it is not necessary to frequently perform apparatus maintenance such as cleaning, and a continuous processing operation for a long time is possible. Further, since it is possible to easily know the state information of the pressure air, it is possible to prevent machining defects and to reduce loss time other than time required for machining such as apparatus maintenance.

  The aspect of the present invention is not limited to the above-described embodiment, and includes various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the above-described contents.

  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 device 2 Holder unit 2a Tapered shank 2b Flange 2c Flange end surface part 3 Cover case 4 Case 5 Sensor 6 Wiring board 7 Power supply 8 O-ring 9 Control circuit board 11 O-ring 12 O-ring 13a Connecting member (10 systems)
13b Connection member (8 systems)
13c Connection member (6 systems)
14 Positioning pin 15 Light-emitting element 16 Pressure air measurement unit 17a, 17b Identification information detection means 18 Bolt 19a, 19b Identification hole 20 Holder unit (8 systems)
21 Holder unit (6 systems)
41 Housing 42 Cylinders 43, 43a, 43b, 43c Piston 44 O-ring 45 Cylinder interior 100 Main shaft 101 First flow path 202 Second flow path 203 Third flow path 204 Fourth flow path 205 Measurement space 206 First 6 flow path 500 Machine tool 501 Operation screen 502 Control unit 503 Personal computer 504 Machine tool system

Claims (5)

A pressure air measuring unit for measuring a state of pressure air blown from a first flow path provided on a spindle of a machine tool to which a machining tool can be attached and detached,
It is possible to detachably connect to a holder unit having a second flow path connected to the first flow path by having a flange end face portion detachably contacting the main shaft, and relating to the measurement of the state of the pressure air A measurement member is accommodated, and is provided so as to be connected to the second flow path and to be connected to the second flow path, and to be connected to the third flow path in series and in a straight line. A housing having a linear fourth flow path and a measurement space connected to the third flow path,
A sensor that constitutes a part of the measurement member and is arranged in the measurement space, converts the state of the pressure air into an electrical signal, and outputs it,
A control circuit that forms part of the measurement member and generates state information of the pressure air based on the electrical signal output from the sensor;
A pressure air measurement unit comprising: The pressure air measurement unit according to claim 1, wherein the state information includes at least one measurement value of a pressure and a flow rate of the pressure air.
A pressure air measuring device detachably attached to the main shaft for measuring a state of pressure air blown from a first flow path provided on a main shaft of a machine tool to which a processing tool is detachable.
A holder unit comprising: a flange end surface portion detachably contacting the main shaft; and a second channel connected to the first channel;
The holder unit is separably connectable, accommodates a measurement member related to the measurement of the state of the pressure air, and is connected to the second flow path, and a linear third flow path, A linear fourth channel provided in series and linearly connected to the third channel and opened to the outside; and a measurement space provided connected to the third channel. A housing with
A sensor that constitutes a part of the measurement member and is arranged in the measurement space, converts the state of the pressure air into an electrical signal, and outputs it,
A control circuit that forms part of the measurement member and generates state information of the pressure air based on the electrical signal output from the sensor;
A pressure air measuring device comprising:   The pressure air measurement device according to claim 3, wherein the state information includes at least one measurement value of the pressure and the flow rate of the pressure air. A machine tool provided with a first flow path in the spindle for blowing pressure air to an attachment / detachment part of a machining tool that is detachably attached to the spindle;
The pressure air measurement device according to claim 3 or 4, which is attached to the main shaft;
A machine tool system comprising: