JP2016049575A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine tool on which a tool can be mounted on a holding part in a short time at a setup time.SOLUTION: A machine tool include a spindle head which holds a spindle so as to rotate around an axis, a tool magazine which has a plurality of holding parts for holding a tool and automatically moves, a cover which covers the tool magazine and the spindle head, and an automatic door arranged on the cover. The machine tool includes a reception part which receives an identifier for identifying the tool, a determination part which determines whether the identifier is received by the reception part or not, a storage part which stores a corresponding relationship between the identifier received by the reception part and the tool, and a start switch which starts driving of the tool magazine and the automatic door. When the start switch is turned on and the determination part determines that the identifier is received, by referring to the storage part, the automatic door is closed, the tool magazine is driven, and the holding part which should hold the tool corresponding to the received identifier is arranged in a predetermined position, and then the automatic door is opened.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a machine tool for machining a workpiece.

  The machine tool holds a spindle rotatably around an axis, and moves up and down a spindle head, a tool magazine holding a tool mounted on the spindle, and a lower part of the spindle head. A table to be held and a reception unit (for example, a keyboard, a switch, or a touch panel) that receives input of information are provided.

  The spindle head, tool magazine and table are surrounded by a cover, and an automatic door is provided at a position facing the table. The tool magazine has a plurality of holding portions (for example, pots or arms for holding tools) that hold tools (for example, Patent Document 1).

  At the time of setup before machining the workpiece, the operator attaches a tool necessary for machining to each holding portion. When attaching a tool to a holding part, an operator operates a reception part and closes an automatic door. Then, the reception unit is operated to drive the tool magazine and place the holding unit at the attachment position. Thereafter, the reception unit is operated to open the automatic door, and the tool is attached to the holding unit at the attachment position. If necessary, the reception unit is operated to change the vertical position of the spindle head.

JP 2013-188797 A

  In order to attach the tool to the holding unit, the operator must operate the receiving unit for opening / closing the automatic door, driving the tool magazine, and changing the vertical position of the spindle head. When each tool is attached to the holding portion, the attachment work of the tool takes a long time and causes a reduction in manufacturing efficiency.

  This invention is made | formed in view of such a situation, and it aims at providing the machine tool which can attach a tool to a holding | maintenance part in a short time at the time of setup.

  A machine tool according to the present invention includes a spindle head that rotatably holds a spindle around an axis, a plurality of holders that hold tools, and a tool magazine that operates automatically, and covers the tool magazine and the spindle head. In a machine tool including a cover and an automatic door provided on the cover, a reception unit that receives an identifier for identifying a tool, a determination unit that determines whether the reception unit has received the identifier, and the reception A storage unit that stores the correspondence between the identifier and the tool received by the unit, and a start switch that starts driving the tool magazine and the automatic door, and the start switch is turned on and the determination unit When it is determined that the identifier is received, the tool corresponding to the received identifier is closed by referring to the storage unit and closing the automatic door and driving the tool magazine. After arranging the holding portion to be held in position, characterized in that are to be opened the automatic door.

  In the present invention, the operator inputs an identifier for identifying the tool. The machine tool stores the identifier and the holding unit in association with each other in the storage unit. The operator turns on the start switch. The machine tool refers to the storage unit, closes the automatic door and drives the tool magazine to place the holding unit corresponding to the identifier at a predetermined position, and then opens the automatic door. The operator attaches the tool according to the identifier to the holding unit at a predetermined position.

  When the machine tool according to the present invention receives a plurality of the identifiers at the receiving unit, the holding unit that should hold a tool corresponding to the received one identifier is arranged at the predetermined position, When the start switch is turned on, the storage unit is referred to hold the tool corresponding to the other received identifier and place the holding unit closest to the predetermined position at the predetermined position. It is characterized by being.

  In the present invention, after attaching one tool to one holding part, the operator turns on the start switch. The machine tool places another holding unit corresponding to another identifier at a predetermined position. An operator attaches another tool to another holding part. The operator can attach other tools by simply operating the start switch.

  The machine tool according to the present invention includes an informing unit that operates when the start switch is turned on and the determination unit does not detect reception of the identifier.

  In the present invention, when the operator does not input an identifier and the start switch is turned on, the notification unit notifies that fact. The machine tool prompts the operator to enter an identifier.

  In the machine tool according to the present invention, when the start switch is turned on and the identifier is not received by the determination unit, the holding unit located next to the predetermined position is arranged at the predetermined position. It is characterized by being.

  In the present invention, when the operator does not input the identifier and the start switch is turned on, the machine tool places the holding portion adjacent to the predetermined position at the predetermined position. Each time the start switch is turned on, the machine tool sequentially places a plurality of holding portions at predetermined positions.

  The machine tool according to the present invention receives the identifier at the reception unit, drives the automatic door and the tool magazine based on the received identifier, and then changes the received identifier at the reception unit. When the reception switch is turned on and the start switch is turned on, the holding unit for holding the tool corresponding to the identifier before the change is arranged at the predetermined position.

  In the present invention, when the registered identifier is changed by the user, the machine tool places only the holding unit corresponding to the changed identifier at a predetermined position. This minimizes the amount of work required for tool replacement.

  In the machine tool according to the present invention, the operator inputs one or a plurality of identifiers for identifying the tool. The machine tool stores the identifier and the holding unit in association with each other in the storage unit. The operator turns on the start switch. The machine tool refers to the storage unit, closes the automatic door and drives the tool magazine to place the holding unit corresponding to the identifier at a predetermined position, and then opens the automatic door. The operator attaches the tool according to the identifier to the holding unit at a predetermined position. Therefore, the operator can attach the tool by positioning the holding portion at a desired position simply by turning on the start switch, and can attach a large number of tools to the holding portion in a short time during setup.

1 is a perspective view showing an appearance of a machine tool according to Embodiment 1. FIG. It is the expansion perspective view which looked at the tool magazine from the back side. 1 is a perspective view schematically showing a machine tool cover surrounding a machine tool. FIG. It is a block diagram which shows the structure of a control board schematically. It is a conceptual diagram which shows an example of the table which shows the correspondence of the arm number and tool number which were stored in the non-volatile memory. It is a flowchart explaining the tool attachment process by a control panel. It is a flowchart explaining the tool attachment process by a control panel. 6 is a flowchart for explaining tool attachment processing by a control panel of a machine tool according to a second embodiment. It is a flowchart explaining the tool attachment process by a control panel. 10 is a flowchart for explaining tool attachment processing by a control panel of a machine tool according to a third embodiment. It is a flowchart explaining the tool attachment process by a control panel.

(Embodiment 1)
Hereinafter, the present invention will be described with reference to the drawings showing a machine tool according to a first embodiment. FIG. 1 is a perspective view showing an external appearance of a machine tool, and FIG. 2 is an enlarged perspective view of the tool magazine 7 as seen from the back side. In the following description, up and down, left and right, and front and rear indicated by arrows in the figure are used.

  A machine tool performs a desired machining (for example, milling, drilling, cutting, etc.) on a workpiece by relatively moving a workpiece (not shown) as a workpiece and a tool. The machine tool includes a metal base 1, and a leg portion is provided at each of the lower four corners of the base 1. The base 1 is a rectangular parallelepiped casting that is long in the longitudinal direction of the machine tool.

  The base 1 is provided with a column seat 3 on the rear portion, and a columnar column 4 extending vertically upward is erected on the column seat 3. The column 4 supports the spindle head 5 so as to be movable up and down along the front surface. The spindle head 5 includes a spindle 5A on which a machining tool 6 is mounted. A Z-axis motor 44 (see FIG. 4) is provided at the top of the column 4, and the spindle head 5 moves up and down by driving the Z-axis motor 44.

  The spindle head 5 includes a spindle motor 5B that rotatably supports the spindle 5A and rotationally drives the spindle 5A. The tool 6 is detachably mounted on the lower end of the main shaft 5A, and the main shaft 5A is rotationally driven by the main shaft motor 5B so that the tool 6 rotates and processes a workpiece fixed to the table 8 described later. The spindle 5A moves between the upper tool change position and the lower machining position by the vertical movement of the spindle head 5. An origin position is set between the machining position and the tool change position, and the spindle 5A moves to the origin position before starting the machining process.

  Support plates 4a protrude forward from the left and right edges of the front surface of the column 4, respectively. A rotary tool magazine 14 for holding the tool 6 is provided at the front end of the support plate 4a. The tool magazine 14 includes a rotating shaft 14d, a disk 14e, an arm 14a, and a cover 14b that can rotate about an axis. The rotating shaft 14d extends in the front-rear direction and is inclined so as to descend toward the front. A magazine motor 18 (see FIG. 4) is connected to the rotating shaft 14d. The disk 14e is connected to the rotating shaft 14d in a posture substantially orthogonal to the rotating shaft 14d. A plurality (14 in this embodiment) of arms 14a (holding portions) are arranged in parallel on the outer peripheral portion of the disk 14e. Each of the plurality of arms 14 a holds a tool 72. A circular plate-like cover 14b is provided on the rear side of the arm 14a. The cover 14b is disposed on the rear end side of the rotating shaft 14d and covers the arm 14a and the disk 14e.

  An opening 14c for inserting or removing the tool 6 is provided in each of the lower right portion and the lower left portion of the cover 14b. The rotation shaft 14d is rotated by the rotation of the magazine motor 18, and the disk 14e is rotated to place the tool 6 held on the arm 14a at a predetermined position.

  A position facing the opening 14c is an attachment position to which the tool 6 is attached. When the arm 14a is disposed at the attachment position, the operator holds the tool 6 and inserts his / her hand into the opening 14c to attach the tool 6 to the arm 14a. When the tool 6 is attached to the arm 14a, the hand is inserted into the opening 14c and the tool 6 is removed from the arm 14a.

  The base 1 supports a table 8 that detachably fixes a workpiece at a position below the spindle head 5. An X-axis motor 42 and a Y-axis motor 43 (see FIG. 4), which are servo motors, control the movement of the table 8 in the X-axis direction (left-right direction) and the Y-axis direction (front-back direction).

  Specifically, a rectangular parallelepiped support base 10 is provided below the table 8, a pair of X-axis feed guides extending along the X-axis direction are provided on the support base 10, and the table is provided on the X-axis feed guides. 8 is movably supported. The base 1 supports a pair of Y-axis feed guides extending along the longitudinal direction (Y-axis direction), and supports the support base 10 so as to be movable on the Y-axis feed guides. The Y-axis motor 43 provided on the base 1 moves the support base 10 in the Y-axis direction along the Y-axis feed guide. The table 8 moves in the X-axis direction along the X-axis feed guide by the rotation of the X-axis motor 42 provided on the support 10.

  FIG. 3 is a perspective view schematically showing a machine tool cover 100 surrounding the machine tool. As shown in FIG. 3, a machine tool cover 100 surrounding the machine tool is provided on the upper side of the base. The machine tool cover 100 includes a rectangular front wall 50, a left wall 60, a right wall 70, and a rear wall 80 that extend in the vertical direction and respectively cover the front, rear, left, and right sides of the machine tool. The machine tool cover 100 includes a rectangular ceiling 90 that covers the upper side of the machine tool and is parallel to the left-right direction and the front-rear direction.

  Each of the left wall 60 and the right wall 70 includes two detachable panels 71 and 71 at the center thereof. In FIG. 3, only the panel 71 on the right wall is shown, and the panel on the left wall 60 is omitted. The operator removes the panel of the left wall 60 or the panels 71 and 71 of the right wall 70 as necessary, and performs maintenance management of the machine tool. The rear wall 80 is provided with a control board 81 having a control board for controlling the operation of the machine tool and amplifiers for supplying electric power to the motors. A central portion of the ceiling 90 protrudes upward so as to avoid contact with the main shaft 5A and the column 4 or the like.

  A vertically long rectangular opening 51 is provided at the center of the front wall 50, and an operation panel 56 for inputting information by an operator is provided to the right of the opening 51. The operation panel 56 includes a keyboard, buttons, a start switch 56a for starting the machine tool, and the like. The operation panel 56 constitutes a reception unit that receives information (for example, an identifier for identifying a tool). A display unit 52 for displaying information is provided above the operation panel 56. A vertically long rectangular right door 55 and left door 54 are juxtaposed in the opening 51 so as to be movable in the left-right direction.

  The right door 55 is disposed behind the left door 54. A handle 55 a is provided on the front surface of the right door 55. The right door 55 and the left door 54 are opened or closed automatically or manually. When manually opening and closing, when the operator grips the handle 55a and pulls it to the left, the right door 55 and the left door 54 move to the left in order and open, and the table 8 appears. When pulled to the right side, the right door 55 and the left door 54 sequentially move to the right side and close.

  When automatically opening and closing, based on a command from the control panel 81, the right door 55 and the left door 54 move to the left and open or move to the right and close.

  FIG. 4 is a block diagram schematically showing the configuration of the control panel 81. The control panel 81 includes a CPU (Central Processing Unit) 82, a ROM (Read Only Memory) 83, a RAM (Random Access Memory) 84, and a nonvolatile memory 85 (storage unit). The ROM 83 stores a control program of the machine tool. The CPU 82 reads the control program from the ROM 83 to the RAM 84 as a work area, and controls the operation of the machine tool. The nonvolatile memory 85 stores various information, for example, information input on the operation panel 56.

  The nonvolatile memory 85 stores various information, for example, information input through the operation panel 56. The nonvolatile memory 85 is, for example, an EEPROM (Electrically Erasable Programmable ROM), an EPROM (Erasable Programmable ROM), or the like. Instead of the nonvolatile memory 85, another rewritable storage medium such as an HD (Hard Disk) may be used.

  The magazine motor 18 is provided with an arm position detector 18a for detecting the position of the arm 14a. The arm position detection unit 18a is constituted by, for example, a rotary encoder or a potentiometer.

  A door opening / closing detector 53 for detecting opening / closing of the right door 55 and the left door 54 is provided at the right edge portion and the left edge portion of the opening 51. For example, the proximity sensor or limit switch constitutes the door opening / closing detection unit 53. When the distance between the right door 55 and the door opening / closing detection unit 53 at the right edge portion is less than a predetermined value and the distance between the right door 55 and the door opening / closing detection unit 53 at the left edge portion is greater than or equal to a predetermined value, the door opening / closing detection unit 53 A signal indicating that the right door 55 and the left door 54 are closed is output. When the distance between the right door 55 and the door opening / closing detection unit 53 at the right edge is equal to or greater than a predetermined value and the distance between the right door 55 and the door opening / closing detection unit 53 at the left edge is less than a predetermined value, the door opening / closing detection is performed. The unit 53 outputs a signal indicating that the right door 55 and the left door 54 are opened.

  The proximity sensor is, for example, a high-frequency oscillation type using electromagnetic induction, a magnetic type using a magnet, or a capacitance type proximity sensor that detects a change in capacitance between a detection object and the sensor, and a photoelectric type or an ultrasonic wave. Type proximity sensor.

  The X-axis motor 42 and the Y-axis motor 43 are provided with an X-axis position detector 42 a and a Y-axis position detector 43 a that detect the left and right and front and rear positions of the table 8. For example, a rotary encoder or a potentiometer constitutes an X-axis position detector 42a and a Y-axis position detector 43a.

  The Z-axis motor 44 is provided with a Z-axis position detector 44a that detects the vertical position of the main shaft 5A. The Z-axis position detection unit 44a is constituted by, for example, a rotary encoder or a potentiometer.

  The left door 54 and the right door 55 are connected to a door opening / closing motor 57 through a transmission mechanism. Driving the door opening / closing motor 57 opens and closes the left door 54 and the right door 55.

  The output signals of the operation panel 56, start switch 56a, arm position detector 18a, door opening / closing detector 53, X-axis position detector 42a, Y-axis position detector 43a, and Z-axis position detector 44a are input to the control panel 81. To do.

  The control panel 81 outputs a drive or stop signal to the magazine motor 18, the X-axis motor 42, the Y-axis motor 43, the Z-axis motor 44 and the door opening / closing motor 57. The control panel 81 outputs a signal for displaying information on the display unit 52.

  The machine tool includes a notification unit 59. For example, the lamp or buzzer constitutes the notification unit 59. The control panel 81 outputs a drive signal to the notification unit 59. The drive of the notification unit 59 notifies the operator that an abnormality has occurred.

  FIG. 5 is a conceptual diagram showing an example of a table showing the correspondence between arm numbers and tool numbers stored in the non-volatile memory 85. The operator operates the operation panel 56 and inputs a tool number (identifier). The table set in the non-volatile memory 85 stores the tool number corresponding to the arm number.

  6 and 7 are flowcharts for explaining tool attachment processing by the control panel 81. FIG.

  The CPU 82 of the control panel 81 takes in a signal from the start switch 56a and waits until the start switch 56a is turned on (step S1: NO). When the start switch 56a is turned on (step S1: YES), the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the tool number has been registered in the table (step S2). The worker registers the tool number in the table in association with the arm number before starting the tool attachment process.

  When it is determined that the tool number has been registered in the table (step S2: YES), the CPU 82 takes in a signal from the door opening / closing detection unit 53 and determines whether the right door 55 and the left door 54 are opened (step). S3). When the right door 55 and the left door 54 are not open (step S3: NO), that is, when the right door 55 and the left door 54 are closed, the CPU 82 advances the process to step S6 described later.

  When the right door 55 and the left door 54 are opened (step S3: YES), the CPU 82 outputs a door closing signal to the door opening / closing motor 57 (step S4), takes in a signal from the door opening / closing detection unit 53, and the right door 55 And it waits until the left door 54 closes (step S5: NO).

  When the right door 55 and the left door 54 are closed (step S5: YES), the CPU 82 takes in a signal from the Z-axis position detection unit 44a and determines whether or not the spindle 5A is at the tool change position (step S6). .

  When the spindle 5A is at the tool change position (step S6: YES), the CPU 82 acquires a signal from the arm position detector 18a and acquires the position of each arm 14a (step S7).

  When the main shaft 5A is not at the tool change position (step S6: NO), the CPU 82 outputs a drive signal to the Z-axis motor 44. The spindle 5A moves to the tool change position (step S8). CPU82 takes in a signal from Z-axis position detection part 44a, and waits until spindle 5A moves to a tool change position (Step S9: NO). When the spindle 5A has moved to the tool change position (step S9: YES), the CPU 82 advances the process to step S7.

  When the position of each arm 14a is acquired in step S7, the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the start arm has been set (step S10).

  When the start arm has not been set (step S10: NO), the CPU 82 determines whether or not a tool number has been registered for the arm 14a at the attachment position (step S18). When the tool number has been registered for the arm 14a at the attachment position (step S18: YES), the CPU 82 sets the arm 14a at the attachment position as a start arm (step S20). Specifically, the CPU 82 stores the number of the arm 14a at the attachment position in the nonvolatile memory 85 as a start arm.

  When the tool number has not been registered for the arm 14a at the attachment position (step S18: NO), the CPU 82 outputs a drive signal to the magazine motor 18. The arm 14a in which the corresponding tool number is registered moves to the attachment position (step S19). CPU82 advances a process to step S20.

  When the start arm has been set (step S10: YES), or when the arm 14a at the attachment position is set as the start arm (step S20), the CPU 82 has registered the corresponding tool number and is closest to the attachment position. Then, an arm 14a different from the start arm is calculated (step S11).

  The CPU 82 outputs a drive signal to the magazine motor 18. The calculated arm 14a moves to the attachment position (step S12).

  The CPU 82 displays the number of the arm 14a at the attachment position (arm number) and the number of the tool to be attached to the arm 14a (tool number) in association with each other on the display unit 52 (step S13). For example, a table as shown in FIG. 5 is displayed on the display unit 52, and the corresponding line is displayed differently from the other lines. For example, the corresponding line is blinked or the background color or number of the corresponding line is displayed in a different color from the other lines. The operator easily understands the relationship between the tool 6 to be attached and the arm 14a.

  The CPU 82 takes in a signal from the arm position detection unit 18a and waits until the calculated arm 14a moves to the attachment position (step S14: NO). When the calculated arm 14a moves to the attachment position (step S14: YES), the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the arm 14a moved to the attachment position is a start arm (step S15). ).

  When the arm 14a moved to the attachment position is not the start arm (step S15: NO), the CPU 82 outputs a door opening signal to the door opening / closing motor 57 (step S16), takes in the signal from the door opening / closing detection unit 53, and the right door. It waits until 55 and the left door 54 open (step S17: NO).

  When the right door 55 and the left door 54 are opened (step S17: YES), the CPU 82 returns the process to step S1. The operator can remove the tool attached to the arm 14a at the attachment position and attach the tool corresponding to the arm 14a. Subsequently, when attaching a tool to the other arm 14a, the operator turns on the start switch 56a (see step S1).

  When the arm 14a moved to the attachment position is the start arm (step S15: YES), the CPU 82 outputs a drive signal to the Z-axis motor 44. The main shaft 5A moves to the origin position (step S21). The CPU 82 deletes the start arm number from the nonvolatile memory 85 and cancels the start arm setting (step S22).

  The CPU 82 stands by until the spindle 5A moves to the origin position (step S23: NO). When the spindle 5A has moved to the origin position, the CPU 82 ends the process (step S23: YES).

  When the tool number is not registered (step S2: NO), the CPU 82 outputs a drive signal to the notification unit 59 to notify that the tool number is not registered (step S24), and ends the process.

  When only a single tool number is registered, the arm corresponding to this tool number moves to the attachment position, and the CPU 82 sets the arm as the start arm (see steps S18 to S20), Since there is no arm 14a in which the corresponding tool number has been registered, in step S11, it is not possible to calculate an arm 14a that has the corresponding tool number registered and that is closest to the attachment position and that is different from the start arm. Therefore, when the arm 14a cannot be calculated in step S11, the CPU 82 shifts the process to step S21.

  In step S2, it is determined whether or not a plurality of tool numbers have been registered. If only a single tool number has been registered or no tool number has been registered (step S2: NO), a notification is made. The unit 59 may be driven and notified (see step S24).

  In the initial state, the user can open the right door 55 and the left door 54 and attach the tool to the arm 14a at the attachment position. If no tool is attached to the start arm after step S23, the user can open the right door 55 and the left door 54 and attach the tool to the start arm.

  In the machine tool according to Embodiment 1, the operator inputs a tool number (identifier) for identifying the tool 6. The machine tool stores the tool number and the arm 14a (arm number) in the nonvolatile memory 85 in association with each other. The operator turns on the activation switch 56a. The machine tool refers to the non-volatile memory 85, closes the right door 55 and the left door 54, drives the tool magazine 14, and places the arm 14a corresponding to the tool number at a predetermined position. The left door 54 is opened. The operator attaches the tool 6 relating to the tool number to the arm 14a at the attachment position. Therefore, the operator can attach the tool 6 by positioning the arm 14a at the attachment position simply by turning on the start switch 56a, and can attach a large number of tools 6 to the arm 14a in a short time during setup. it can.

  Further, after attaching one tool 6 to one arm 14a, the operator turns on the start switch 56a. The machine tool places another arm 14a corresponding to another tool number at the attachment position. An operator can attach another tool 6 to another arm 14a.

  Further, when the operator does not input the tool number and the start switch 56a is turned on, the notification unit 59 notifies that fact. The machine tool can prompt the operator to enter a tool number.

  The table 8 may not move in the left-right direction or the front-rear direction, and the spindle head 5 may be movable in the left-right direction or the front-rear direction. In that case, in step S21, when the spindle 5A moves to the tool change position or the origin position, the CPU 82 controls to move the spindle head 5 to the tool change position or the origin position also in the left-right direction or the front-rear direction. In addition, the identifier of a tool is not limited to a number, A character, a figure, a symbol, etc. may be sufficient.

(Embodiment 2)
Hereinafter, the present invention will be described with reference to the drawings showing a machine tool according to a second embodiment. 8 and 9 are flowcharts for explaining tool attachment processing by the control panel 81. FIG.

  The CPU 82 of the control panel 81 takes in a signal from the start switch 56a and waits until the start switch 56a is turned on (step S31: NO). When the start switch 56a is turned on (step S31: YES), the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the tool number has been registered in the table (step S32).

  When it is determined that the tool number has been registered in the table (step S32: YES), the CPU 82 takes in a signal from the door opening / closing detection unit 53 and determines whether the right door 55 and the left door 54 have been opened (step). S34). When the right door 55 and the left door 54 are not opened (step S34: NO), that is, when the right door 55 and the left door 54 are closed, the CPU 82 advances the process to step S37 described later.

  If it is determined that the tool number is not registered in the table (step S32: NO), the CPU 82 sets an unregistered flag indicating that the tool number is not registered in the nonvolatile memory 85 (step S33), and step S34. Proceed with the process.

  When the right door 55 and the left door 54 are opened (step S34: YES), the CPU 82 outputs a door closing signal to the door opening / closing motor 57 (step S35), takes in a signal from the door opening / closing detection unit 53, and receives the right door 55. And it waits until the left door 54 closes (step S36: NO).

  When the right door 55 and the left door 54 are closed (step S36: YES), the CPU 82 takes in a signal from the Z-axis position detection unit 44a and determines whether or not the spindle 5A is at the tool change position (step S37). .

  When the spindle 5A is at the tool change position (step S37: YES), the CPU 82 acquires a signal from the arm position detection unit 18a and acquires the position of each arm 14a (step S38).

  When the spindle 5A is not at the tool change position (step S37: NO), the CPU 82 outputs a drive signal to the Z-axis motor 44. The spindle 5A moves to the tool change position (step S39). CPU82 takes in a signal from Z-axis position detection part 44a, and waits until spindle 5A moves to a tool change position (Step S40: NO). When the spindle 5A has moved to the tool change position (step S40: YES), the CPU 82 advances the process to step S38.

  In step S38, when the position of each arm 14a is acquired, the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the start arm has been set (step S41).

  If the start arm has not been set (step S41: NO), the CPU 82 determines whether or not a tool number has been registered for the arm 14a at the attachment position (step S54). When the tool number has been registered for the arm 14a at the attachment position (step S54: YES), the CPU 82 sets the arm 14a at the attachment position as a start arm (step S56). Specifically, the CPU 82 stores the number of the arm 14a at the attachment position in the nonvolatile memory 85 as a start arm.

  If the tool number has not been registered for the arm 14a at the attachment position (step S54: NO), the CPU 82 outputs a drive signal to the magazine motor 18. The arm 14a in which the corresponding tool number is registered moves to the attachment position (step S55). CPU82 advances a process to step S56.

  When the start arm has been set (step S41: YES), or when the arm 14a at the attachment position is set as the start arm (step S56), the CPU 82 sets the unregistered flag in the nonvolatile memory 85. It is determined whether or not there is (step S42).

  When the unregistered flag is not set in the non-volatile memory 85 (step S42: NO), the CPU 82 calculates an arm 14a different from the start arm that has the corresponding tool number registered and is closest to the attachment position (step S43). ).

  The CPU 82 outputs a drive signal to the magazine motor 18. The calculated arm 14a moves to the attachment position (step S44).

  The CPU 82 displays the number of the arm 14a at the attachment position (arm number) and the number of the tool to be attached to the arm 14a (tool number) in association with each other on the display unit 52 (step S45).

  CPU82 takes in a signal from arm position detection part 18a, and waits until calculated arm 14a moves to an attachment position (Step S46: NO).

  If the unregistered flag is set in the nonvolatile memory 85 in step S42 (step S42: YES), the CPU 82 outputs a drive signal to the magazine motor 18 and attaches the arm 14a located next to the attachment position. The position is moved (step S47), and the process proceeds to step S45.

  In step S46, when the calculated arm 14a moves to the attachment position (step S46: YES), the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the arm 14a moved to the attachment position is a start arm. (Step S48).

  When the arm 14a moved to the attachment position is not the start arm (step S48: NO), the CPU 82 outputs a door opening signal to the door opening / closing motor 57 (step S49), takes in the signal from the door opening / closing detection unit 53, and the right door. It waits until 55 and the left door 54 open (step S50: NO).

  When the right door 55 and the left door 54 are opened (step S50: YES), the CPU 82 returns the process to step S31. The operator can remove the tool attached to the arm 14a at the attachment position and attach the tool corresponding to the arm 14a. Subsequently, when attaching a tool to the other arm 14a, the operator turns on the start switch 56a (see step S31).

  When the arm 14a moved to the attachment position is the start arm (step S48: YES), the CPU 82 outputs a drive signal to the Z-axis motor 44. The main shaft 5A moves to the origin position (step S51). The CPU 82 deletes the start arm number from the nonvolatile memory 85 and cancels the start arm setting (step S52).

  The CPU 82 stands by until the spindle 5A moves to the origin position (step S53: NO). When the spindle 5A has moved to the origin position (step S53: YES), the CPU 82 ends the process.

  When the operator registers only a single tool number, the arm corresponding to this tool number moves to the mounting position, and the CPU 85 sets the arm as the start arm (see steps S54 to S56), the other than the mounting position Since there is no arm 14a in which the corresponding tool number has already been registered, the arm 14a in which the corresponding tool number has been registered and which is closest to the mounting position cannot be calculated in step S43. Therefore, when the arm 14a cannot be calculated in step S43, the CPU 82 shifts the process to step S51.

  In the machine tool according to the second embodiment, when the operator has not input a tool number at all and the start switch 56a is turned on, the arm 14a adjacent to the attachment position moves to the attachment position. . Each time the activation switch 56a is turned on, the plurality of arms 14a sequentially move to a predetermined position, and the operator attaches each tool 6 to the desired arm 14a.

  Of the configuration of the machine tool according to the second embodiment, the same reference numerals are given to the same configurations as those in the first embodiment, and detailed description thereof is omitted.

(Embodiment 3)
Hereinafter, the present invention will be described with reference to the drawings showing a machine tool according to a third embodiment. 10 and 11 are flowcharts for explaining tool attachment processing by the control panel 81.

  It is assumed that the machine tool executes the processing before executing the tool attachment processing, and the tool 6 is attached to the plurality of arms 14a. It is assumed that the tool number of the tool 6 is registered in association with the arm 14a. When the operator registers the tool number of one tool 6 corresponding to one arm 14a, the operator can overwrite the tool number of another tool 6. That is, the tool number can be changed. When the operator changes the tool number, the nonvolatile memory 85 stores the changed tool number (changed tool number).

  For example, when the tool number 5 corresponding to the arm number 2 is changed to the tool number 6 and the tool number 2 corresponding to the arm number 4 is changed to the tool number 7, the tool numbers 6 and 7 become the changed tool numbers.

  The CPU 82 of the control panel 81 takes in a signal from the activation switch 56a and waits until the activation switch 56a is turned on (step S61: NO). When the start switch 56a is turned on (step S61: YES), the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the changed tool number has been registered in the table (step S62).

  When it is determined that the changed tool number has been registered in the table (step S62: YES), the CPU 82 refers to the nonvolatile memory 85 and acquires the changed tool number (step S63). The CPU 82 takes in a signal from the door opening / closing detection unit 53 and determines whether or not the right door 55 and the left door 54 are open (step S64). When the right door 55 and the left door 54 are not open (step S64: NO), that is, when the right door 55 and the left door 54 are closed, the CPU 82 advances the process to step S67 described later.

  When the right door 55 and the left door 54 are open (step S64: YES), the CPU 82 outputs a door closing signal to the door opening / closing motor 57 (step S65), takes in a signal from the door opening / closing detection unit 53, and the right door. It waits until 55 and the left door 54 close (step S66: NO).

  When the right door 55 and the left door 54 are closed (step S66: YES), the CPU 82 takes in a signal from the Z-axis position detection unit 44a and determines whether or not the spindle 5A is at the tool change position (step S67). .

  When the spindle 5A is at the tool change position (step S67: YES), the CPU 82 acquires a signal from the arm position detection unit 18a and acquires the position of each arm 14a (step S68).

  If the main shaft 5A is not at the tool change position (step S67: NO), the CPU 82 outputs a drive signal to the Z-axis motor 44. The spindle 5A moves to the tool change position (step S69). CPU82 takes in a signal from Z-axis position detection part 44a, and waits until spindle 5A moves to a tool change position (Step S70: NO). When the spindle 5A has moved to the tool change position (step S70: YES), the CPU 82 advances the process to step S68.

  When the position of each arm 14a is acquired in step S68, the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the start arm has been set (step S71).

  When the start arm has not been set (step S71: NO), the CPU 82 sets one arm 14a corresponding to the acquired changed tool number as the start arm (step S72). CPU82 advances a process to step S73 mentioned later.

  When the start arm has been set (step S71: YES), the CPU 82 calculates an arm 14a corresponding to the changed tool number and closest to the start arm, which is different from the start arm (step S73).

  The CPU 82 outputs a drive signal to the magazine motor 18. The calculated arm 14a moves to the attachment position (step S74).

  The CPU 82 displays the number of the arm 14a at the attachment position (arm number) and the number of the tool to be attached to the arm 14a (tool number) in association with each other on the display unit 52 (step S75).

  CPU82 takes in a signal from arm position detection part 18a, and waits until calculated arm 14a moves to an attachment position (Step S76: NO). When the calculated arm 14a moves to the attachment position (step S76: YES), the CPU 82 refers to the nonvolatile memory 85 and determines whether or not the arm 14a moved to the attachment position is a start arm (step S77). ).

  When the arm 14a moved to the attachment position is not the start arm (step S77: NO), the CPU 82 outputs a door opening signal to the door opening / closing motor 57 (step S78), takes in the signal from the door opening / closing detection unit 53, and the right door. It waits until 55 and the left door 54 open (step S79: NO).

  When the right door 55 and the left door 54 are opened (step S79: YES), the CPU 82 returns the process to step S61. The operator removes the tool 6 attached to the arm 14 a at the attachment position and replaces it with another tool 6. Subsequently, when exchanging the tool of the other arm 14a, the operator turns on the start switch 56a (see step S61).

  When the arm 14a moved to the attachment position is the start arm (step S77: YES), the CPU 82 outputs a drive signal to the Z-axis motor 44. The main shaft 5A moves to the origin position (step S80). The CPU 82 deletes the start arm number from the nonvolatile memory 85 and cancels the start arm setting (step S81).

  The CPU 82 stands by until the spindle 5A moves to the origin position (step S82: NO). When the spindle 5A moves to the origin position (step S82: YES), the CPU 82 ends the process.

  When the operator has not registered the change tool number (step S62: NO), the CPU 82 outputs a drive signal to the notification unit 59 to notify that the change tool number is not registered (step S83), and the process. Exit. The notification unit 59 prompts the operator to register the changed tool number.

  When the operator registers only a single change tool number, the arm corresponding to this change tool number moves to the attachment position, and the CPU 82 sets the arm as the start arm (see step S72), the position other than the attachment position Since there is no arm 14a in which the corresponding change tool number has been registered at the location, in step S73, it is not possible to calculate an arm 14a that has the corresponding tool number registered and that is closest to the attachment position and that is different from the start arm. Therefore, when the arm 14a cannot be calculated in step S73, the CPU 82 shifts the process to step S80.

  In the machine tool according to the third embodiment, when the operator changes the tool number, the machine tool places only the tool pot 14a corresponding to the changed tool number at the attachment position. Thereby, the amount of work required for exchanging the tool 6 is minimized.

  Of the configuration of the machine tool according to the third embodiment, the same reference numerals are given to the same configurations as those in the first or second embodiment, and detailed description thereof will be omitted.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

5 Spindle head 5A Spindle 6 Tool 14 Tool magazine 14a Arm (holding part)
54 Left door (automatic door)
55 Right door (automatic door)
56 Operation panel (reception part)
56a Start switch (start switch)
59 Notification unit 81 Control panel (determination unit)
82 CPU
83 ROM
84 RAM
85 Nonvolatile memory (storage unit)
100 Machine tool cover (cover)

Claims (5)

A spindle head that holds the spindle so as to be rotatable about the axis, a tool magazine that has a plurality of holding parts that hold the tool, and that operates automatically, a cover that covers the tool magazine and the spindle head, In a machine tool with an automatic door,
A reception unit for receiving an identifier for identifying a tool;
A determination unit for determining whether or not the identifier is received by the reception unit;
A storage unit for storing a correspondence relationship between the identifier and the tool received by the reception unit;
A start switch for starting the driving of the tool magazine and the automatic door,
The identifier received by closing the automatic door and driving the tool magazine with reference to the storage unit when the start switch is turned on and the determination unit determines that the identifier is received A machine tool, wherein the automatic door is opened after the holding portion that should hold the tool corresponding to is disposed at a predetermined position. When a plurality of the identifiers are received by the reception unit, the start switch is turned on after the holding unit that should hold the tool corresponding to the received one identifier is disposed at the predetermined position. In addition, with reference to the storage unit, the tool corresponding to the other received identifier is held, and the holding unit closest to the predetermined position is arranged at the predetermined position. Item 1. The machine tool according to Item 1. The machine tool according to claim 1, further comprising a notification unit that operates when the start switch is turned on and the determination unit does not detect reception of the identifier. The holding unit located next to the predetermined position is arranged at the predetermined position when the start switch is turned on and the determination unit does not accept the identifier. Item 1. The machine tool according to Item 1. The reception unit receives the identifier, and after driving the automatic door and the tool magazine based on the received identifier, the reception unit receives a change in the received identifier and the start switch is turned on. The tool according to any one of claims 1 to 4, wherein the holding portion that holds the tool corresponding to the identifier before the change is arranged at the predetermined position in the case of becoming a change. machine.

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