JP6229396B2 - Numerical controller - Google Patents

Description

  The present invention relates to a numerical control device.

  The numerical control device controls the operation of the machine tool. The machine tool is provided with an encoder in each motor that operates. The encoder detects absolute information (absolute position information) of the motor, stores it in the encoder memory, and outputs it to the numerical controller. Based on the absolute information received from the encoder of each axis, the numerical control device matches the machine coordinates of each axis and drives and controls the motor of each axis. Patent Document 1 discloses a machine tool that controls each motor based on a position feedback signal output from an encoder of each axis of X, Y, Z, and tool magazine. A numerical control device for controlling a machine tool further equipped with a rotary table receives absolute information from an encoder of a motor that drives the rotary table, and in addition to controlling each of the X axis, Y axis, Z axis, and magazine axis, The QT axis that is the axis of the rotary table is also controlled at the same time.

  If the battery of the encoder runs out or the connector connected to the battery is pulled out and left unattended, the absolute information of each axis stored in the encoder memory is lost, and the numerical control device cannot be matched with the machine coordinates. When the absolute information of a plurality of axes disappears, the operator needs to adjust the position of each axis one by one in a predetermined order. For example, when the absolute information of the Y axis, Z axis, QT axis, and magazine axis is lost, recovery must be performed in the order of the magazine axis, Z axis or Y axis, Y axis or Z axis, and QT axis. The reason for restoring the magazine axis first is that if the position of the tool magazine is not correct, the tool magazine and the spindle head interfere when the Z-axis is moved.

JP 2012-206227 A

  If the operator makes a mistake in the position adjustment order, the shaft and the shaft interfere with each other as described above, so the numerical control device cannot adjust the position and cannot restore each axis. .

  An object of the present invention is to provide a numerical control device that enables an operator to sequentially and appropriately adjust the position of each axis when position information stored in an encoder is lost.

A numerical control device according to claim 1 of the present invention is provided with a spindle head that is provided so as to be movable at least in the Y-axis direction, which is the longitudinal direction of the machine tool, and in the Z-axis direction, which is the vertical direction, and has a spindle on which a tool can be mounted A tool magazine that supports a tool in an indexable position near the spindle so that the tool can be indexed, a Y-axis motor that drives the spindle head in the Y-axis direction, and a Z-axis motor that drives the spindle head in the Z-axis direction; , A magazine motor for driving the tool magazine, a Y-axis encoder for detecting position information of the Y-axis motor, a Z-axis encoder for detecting position information of the Z-axis motor, and detecting position information of the magazine motor. A machine tool including a magazine encoder, and the position information detected by the Y-axis encoder, the Z-axis encoder, and the magazine encoder, respectively. In the numerical control device having control means for controlling the Y-axis motor, the Z-axis motor, and the magazine motor, respectively, the Y-axis encoder, the Z-axis encoder, and the magazine encoder are detected by each The position information is stored in its own storage device, and when the machine tool is started, if the storage device does not store the position information, error information is externally output, and the control means Is based on the error information received by the receiving means, receiving means for receiving the error information output by the Y-axis encoder, the Z-axis encoder, and the magazine encoder when the machine tool is started. Of the position of the head in the Y-axis direction, the position of the spindle head in the Z-axis direction, and the position of the index axis of the tool magazine, the Y A specifying unit that specifies an adjustment target axis that is an operation axis that requires position adjustment for consistency with the position information detected by the encoder, the Z-axis encoder, and the magazine encoder; and For the specified adjustment target axis, the priority of the position of the index shaft, the position of the spindle head in the Z-axis direction, and the position of the spindle head in the Y-axis direction, or the position of the index shaft, the spindle head Determining means for determining the order in which the position adjustment of the adjustment target axis is performed based on the priority order of the position of the spindle head in the Z-axis direction and the order determined by the determining means Based on the above, the work execution means for causing the operator to perform the position adjustment of the adjustment target axis, and the position of the indexing shaft based on the result specified by the specifying means, the Z-axis direction of the spindle head And a first display control means for displaying position adjustment information, which is information on whether or not the position adjustment is necessary, on a display unit with respect to a position in a direction and a position in the Y-axis direction of the spindle head. To do. When the position information stored in the storage device of each encoder is lost, the position of each axis needs to be adjusted when the machine tool is started. The numerical controller identifies an adjustment target axis that needs position adjustment, and determines the order in which the position adjustment of the adjustment target axis is executed based on a preset priority order. Further, the numerical control device causes the operator to adjust the position of the adjustment target axis based on the determined order. Therefore, the numerical control device can prevent the operator from making a mistake in the order of adjusting the position of the adjustment target axis. Since the position adjustment of the index axis of the tool magazine is performed first, the spindle head does not interfere with the tool magazine when the spindle head is moved in the Z-axis direction. The operator does not need to consider the order of position adjustment of the adjustment target axis. Further, when the machine tool is started, the worker confirms the position adjustment information displayed on the display unit. Since the worker can recognize whether or not position adjustment is necessary for each axis, the work can be smoothly performed.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the determining means includes the position of the indexing shaft and the main shaft with respect to the adjustment target axis specified by the specifying means. The order is determined according to the priority order of the position of the head in the Z-axis direction and the position of the spindle head in the Y-axis direction. Since the position adjustment in the Y-axis direction is performed after the position adjustment of the spindle head in the Z-axis direction, the position of the spindle head does not interfere with the workpiece or other parts when the position adjustment in the Y-axis direction is performed.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the invention, the work execution unit is configured to perform the adjustment in the order determined by the determination unit for each of the adjustment target axes. A second display control means for displaying a procedure for adjusting the position of the adjustment target axis on the display unit is provided. By following the work procedure displayed on the display unit, the worker can adjust the position of the adjustment target axis without making a mistake.

A numerical control device according to a fourth aspect of the invention is based on the output of the Y-axis encoder or the Z-axis encoder that outputs the error information , in addition to the configuration of the invention according to any one of the first to third aspects, A current coordinate position specifying means for specifying a current machine coordinate position whose relation to the reference position of the position adjustment in the Y-axis direction or the Z-axis direction of the spindle head is unknown, and the work execution means includes the spindle head The machine coordinate position specified by the current coordinate position specifying means when the position adjustment in the Y-axis direction or the position of the spindle head in the Z-axis direction is executed by the operator, and the position adjustment target And a third display control means for displaying on the display section a target position which is a coordinate position. Since the current machine coordinate position and target position are displayed on the display unit, this is a guideline for adjusting the position of the spindle head.

The numerical control apparatus of the invention according to claim 5, in addition to the configuration of the invention according to any one of claims 1 to 4, the numerical controller, positive workpiece holding and horizontally below the said spindle head A rotary table that can be rotated in reverse, a table motor that drives the rotary table, position information of the table motor is detected and the detected position information is stored in its own storage device, and when the machine tool is started, A table encoder that outputs error information when the storage device does not store the position information; and the control means includes the Y-axis encoder, Based on the position information detected by each of the Z-axis encoder, the magazine encoder, and the table encoder, the Y-axis motor, the Z-axis motor, Each of the gadget motor and the table encoder is controlled, and the receiving means receives the error information output by the Y-axis encoder, the Z-axis encoder, the magazine encoder, and the table encoder when the machine tool is started up. The specifying means is based on the error information received by the receiving means, the position of the spindle head in the Y-axis direction, the position of the spindle head in the Z-axis direction, the position of the indexing shaft, and the position of the rotary table. Of the rotational positions, the Y axis encoder, the Z axis encoder, the magazine encoder, and the adjustment target axis that requires the position adjustment to be consistent with the position information detected by the table encoder. Specifying the position of the indexing axis for the adjustment target axis specified by the specifying means; The position of the spindle head in the Z-axis direction, the position of the spindle head in the Y-axis direction, and the priority of the rotation position of the rotary table, or the position of the indexing shaft, the position of the spindle head in the Y-axis direction, The order in which the position adjustment of the adjustment target shaft is executed is determined based on the priority order of the position of the spindle head in the Z-axis direction and the rotation position of the rotary table. The above effect can be obtained even with a machine tool provided with a rotary table. After adjusting the index position of the tool magazine, the position of the spindle head in the Z-axis direction, and the position of the spindle head in the Y-axis direction, the rotation position of the rotary table is adjusted. In this case, it is possible to prevent the work or jig on the rotary table from interfering with the spindle head or the like.

1 is a perspective view of a machine tool 1. FIG. 2 is a block diagram showing an electrical configuration of the machine tool 1 and the numerical controller 20. The figure which shows the connection state of the Z-axis motor 53 and encoder 53A, and the numerical control apparatus 20. FIG. The conceptual diagram of the error information table 231. The flowchart of a battery exhaustion recovery process. 6 is a flowchart showing a continuation of FIG. FIG. 7 is a flowchart showing a continuation of FIG. 6. FIG. 8 is a flowchart showing a continuation of FIG. 7. The figure which shows the battery dead recovery screen 101. FIG. The figure which shows the position adjustment (magazine) screen 201. FIG. The figure which shows the position adjustment (Z-axis) screen 301. FIG. The figure which shows the position adjustment (Y-axis) screen 401. FIG. The figure which shows the position adjustment (QT axis | shaft) screen 501. FIG.

  Hereinafter, a numerical controller 20 according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the top, bottom, left and right, front and back indicated by arrows in the figure are used. The vertical, horizontal, and longitudinal directions of the machine tool 1 are the Z axis, Y axis, and X axis of the machine tool 1. The numerical control device 20 controls the operation of the machine tool 1 shown in FIG. 1 based on the NC program to cut the workpiece.

  The structure of the machine tool 1 will be described with reference to FIG. The machine tool 1 includes a base 2, an X-axis movement mechanism (not shown), a Y-axis movement mechanism (not shown), a Z-axis movement mechanism (not shown), a carrier 12, a column 5, a spindle head 6, and a spindle (not shown). ), A rotary table device 8, a tool changer 9, a control box 10 and the like. The base 2 is a rectangular box-shaped iron member that is long in the Y-axis direction, and includes a pedestal portion 4 on the upper surface rear side.

  The X-axis moving mechanism is provided on the upper surface of the substantially rectangular parallelepiped base portion 4. The X-axis moving mechanism includes a pair of X-axis rails (not shown), an X-axis ball screw (not shown), an X-axis motor 51 (see FIG. 2), and the like. The X-axis rail and the X-axis ball screw extend in the X-axis direction. The carrier 12 has a box shape. The carrier 12 includes a nut (not shown) on the bottom outer surface. The nut is screwed onto the X-axis ball screw. When the X-axis motor 51 rotates the X-axis ball screw, the carrier 12 moves along the X-axis rail together with the nut. Therefore, the X-axis moving mechanism supports the carrier 12 so as to be movable in the X-axis direction.

  The Y-axis moving mechanism is provided inside the carrier 12. The Y-axis moving mechanism includes a pair of Y-axis rails (not shown), a Y-axis ball screw (not shown), a Y-axis motor 52 (not shown), and the like. The Y-axis rail and the Y-axis ball screw extend in the Y-axis direction. The column 5 is a substantially rectangular metal column member, and includes a pedestal 5A at the bottom. The base 5A includes a nut (not shown) at the bottom. The nut is screwed onto the Y-axis ball screw. When the Y-axis motor 52 rotates the Y-axis ball screw, the column 5 moves in the Y-axis direction along the Y-axis rail together with the nut. The column 5 can be moved in the X-axis direction and the Y-axis direction by the X-axis moving mechanism, the Y-axis moving mechanism, and the carrier 12, respectively. Therefore, the Y-axis moving mechanism supports the column 5 so as to be movable in the Y-axis direction.

  The Z-axis moving mechanism is provided on the front surface of the column 5. The Z-axis moving mechanism includes a pair of Z-axis rails (not shown), a Z-axis ball screw (not shown), a Z-axis motor 53 (see FIG. 2), and the like. The Z-axis rail and the Z-axis ball screw extend in the Z-axis direction. The spindle head 6 includes a nut (not shown) on the back surface. The nut is screwed onto the Z-axis ball screw. The Z-axis motor 53 is fixed to a bearing (not shown) at the upper end of the Z-axis ball screw. When the Z-axis motor 53 rotates the Z-axis ball screw, the spindle head 6 moves up and down in the Z-axis direction along the Z-axis rail. Therefore, the Z-axis moving mechanism supports the spindle head 6 so as to be movable in the Z-axis direction.

  The spindle head 6 has a Z-axis cover 30 attached to the lower part thereof. The Z-axis cover 30 covers a Z-axis moving mechanism provided on the front surface of the column 5 and expands and contracts according to the vertical movement of the spindle head 6. The Z-axis cover 30 prevents chips and cutting fluid from entering the Z-axis moving mechanism. The spindle is provided inside the spindle head 6, and a tool mounting hole (not shown) is provided at the bottom of the spindle head 6. The tool T is mounted in the tool mounting hole. The main shaft is rotated by a main shaft motor 54 (see FIG. 2).

  The carrier 12 includes an X-axis telescopic cover 13 on the right side and an X-axis telescopic cover 14 on the left side. The X-axis telescopic covers 13 and 14 are structures that expand and contract by overlapping a plurality of covers. The X-axis telescopic cover 13 covers the X-axis moving mechanism that is exposed from the right side surface of the carrier 12 to the right side. The X-axis telescopic cover 14 covers the Y-axis moving mechanism exposed on the left side from the left side surface of the carrier 12. The X-axis telescopic covers 13 and 14 expand and contract following the movement of the carrier 12 in the X-axis direction.

  The column 5 includes a Y-axis telescopic cover 15 at the rear part of the base 5A. The Y-axis telescopic cover 15 is a structure that expands and contracts by overlapping the covers 15A, 15B, and 15C sequentially from the pedestal 5A side toward the rear. The Y-axis telescopic cover 15 covers the Y-axis moving mechanism in the transport body 12 exposed at the rear rear side of the column 5. The Y-axis telescopic cover 15 expands and contracts following the movement of the column 5 in the Y-axis direction. The X-axis telescopic covers 13 and 14 prevent the chips and cutting fluid from entering the X-axis moving mechanism, and the Y-axis telescopic cover 15 prevents the Y-axis moving mechanism from entering the Y-axis moving mechanism.

  The column 5 attaches the upper end part of the cover member 16 to the front end part of the base 5A. The cover member 16 covers the exposed upper surface of the carrier 12. The lower end side of the cover member 16 hangs down to the front side of the carrier 12. A pair of rollers (not shown) provided at the left and right ends of the carrier 12 supports the cover member 16. Since the cover member 16 moves together with the column 5 in the Y-axis direction, the upper surface of the transport body 12 can be always covered.

  The rotary table device 8 includes a main body portion 17, a rotary table 18, and a table motor 56 (see FIG. 2). The main body 17 is installed on the upper front side of the base 2. The turntable 18 can be turned on the main body 17 in the horizontal direction. The table motor 56 is a drive source for turning the rotary table 18. The turntable 18 has a substantially rectangular shape in plan view. The turntable 18 includes a pair of pallets P1 and P2 on the upper surface. The pallets P1 and P2 are located on one end side and the other end side in the long side direction of the turntable 18 with the rotation center of the turntable 18 in between. The pallets P1 and P2 support the workpiece using a jig (not shown) or the like. The main body 17 includes a clamp device 58 (see FIG. 2). The clamp device 58 fixes the rotary table 18 so that the long side direction of the rotary table 18 is parallel to the Y-axis direction during processing of the workpiece.

  The rotary table device 8 includes a stop-type indexing mechanism. The indexing mechanism of the stopper system includes a first stopper piece and a second stopper piece (not shown), a first positioning member, and a second positioning member. The first stopper piece and the second stopper piece are respectively provided on the outer surface of the main body portion 17 and are fixed to the same radial position with a bolt or the like at a predetermined angle (for example, 90 degrees) across the rotation center of the rotary table 18. On the other hand, the first positioning member and the second positioning member are provided on the lower surface side of the turntable 18. The numerical control device 20 rotates the rotary table 18 counterclockwise (top view) in order to determine the rotary table 18 at the 0 degree position. The first positioning member contacts the first stopper piece. The rotary table 18 is indexed to the 0 degree position, and the pallet P1 is located in the machining area on the column 5 side. The numerical controller 20 rotates the rotary table 18 in the reverse direction in order to determine the rotary table 18 at the 180 degree position. The second positioning member contacts the second stopper piece. The rotary table 18 is indexed at a 180 degree position, and the pallet P2 is located in the machining area.

  When the pallet P1 is located in the machining area, the machine tool 1 rotates the tool T mounted on the spindle and performs cutting of the workpiece supported on the pallet P1. When the machining of the workpiece is completed, the machine tool 1 turns the rotary table 18 by 180 degrees. The positions of the pallets P1 and P2 are interchanged. The pallet P2 is located on the column 5 side. The machine tool 1 rotates the tool T mounted on the spindle and performs cutting of the workpiece supported on the pallet P2. During the processing of the workpiece on the pallet P2, the operator removes the processed workpiece supported by the pallet P1 and attaches the unprocessed workpiece. The machine tool 1 can sequentially process a plurality of workpieces by repeating this operation.

  The tool changer 9 includes a tool magazine 19. The tool magazine 19 is supported in front of the spindle head 6 and is rotated around the axis by driving a magazine motor 55 (see FIG. 2). The tool magazine 19 includes a plurality of tool gripping portions 19A on the outer periphery in the circumferential direction. The tool magazine 19 assigns a magazine number to each of the plurality of tool gripping portions 19A. An operator detachably attaches the tool T to the tool gripping portion 19A. The position of the tool grip 19A located at the lowermost part of the tool magazine 19 is a tool change position. The tool change position is a position where tool exchange is performed with the spindle of the machine tool 1. The tool magazine 19 can rotate forward (clockwise in front view) and reverse (counterclockwise in front view). The forward rotation and the reverse rotation are determined by the relative positional relationship between the tool gripping portion 19A of the current tool T currently mounted on the spindle and the tool gripping portion 19A of the next tool to be mounted on the spindle after the tool replacement.

  An example of the tool change operation is as follows. When there is a tool change command (M06 command) in the NC program, the numerical control device 20 (see FIG. 2) determines the position of the tool gripper 19A of the next tool to be changed. The numerical control device 20 calculates the turning angle of the tool magazine 19 required until the tool gripping part 19A for gripping the next tool is transported from the current position to the tool replacement position. The tool gripping portion 19A of the current tool T is in the tool change position. The spindle head 6 rises from the machining position. The tool gripping portion 19A of the tool magazine 19 grips the current tool T mounted on the spindle. Since the spindle head 6 is further raised, the tool gripping part 19A pulls out the gripped current tool T from the spindle. The numerical controller 20 drives the magazine motor 55 so as to turn the tool magazine 19 at the calculated turning angle. The tool magazine 19 turns and the next tool moves to the tool change position. Thereafter, the spindle head 6 is lowered. The next tool gripped by the tool gripping portion 19A of the tool magazine 19 is mounted in the tool mounting hole of the spindle. The spindle head 6 moves down to the machining position in a state where the next tool leaves the tool gripping portion 19A and the next tool is installed in the tool mounting hole of the spindle. Thus, the tool change operation is completed.

  The control box 10 is supported behind the column 5 by a support member 2 </ b> A provided on the back surface of the base 2. The control box 10 has a rectangular parallelepiped shape, and stores the numerical control device 20 inside. The control box 10 is provided with a battery installation portion (not shown) on the side surface for installing a battery 64 (see FIG. 3). The battery 64 supplies power to various encoders 51A to 56A described later.

  The electrical configuration of the machine tool 1 will be described with reference to FIG. The machine tool 1 includes a numerical control device 20. The numerical control device 20 includes a CPU 21, a ROM 22, a RAM 23, a nonvolatile storage device 24, an input unit 25, an input / output unit 26, and the like. The CPU 21 comprehensively controls the operation of the machine tool 1. The ROM 22 stores various programs. The RAM 23 stores various data. The nonvolatile storage device 24 stores an NC program and the like. The NC program is composed of a plurality of blocks. Each block includes various NC commands. The NC command is a control command.

  The touch panel 38 and the input key unit 39 are connected to the input unit 25. The touch panel 38 and the input key unit 39 are provided on an operation panel (not shown) provided on a cover (not shown) that covers the machine tool 1. The operation panel includes a display unit 11, and the touch panel 38 is provided on the display unit 11. The input key unit 39 is a key group having various keys. The operator performs various inputs and settings of the machine tool 1 using the touch panel 38 and the input key unit 39.

  The drive circuits 41 to 46, 48 and 49 are connected to the input / output unit 26. The drive circuit 41 drives the X axis motor 51. The encoder 51A is connected to the X-axis motor 51 and the input / output unit 26. The encoder 51 A detects absolute information (motor absolute position information) of the X-axis motor 51 and inputs the detection signal to the input / output unit 26. The drive circuit 42 drives the Y axis motor 52. The encoder 52 </ b> A is connected to the Y-axis motor 52 and the input / output unit 26. The encoder 52 </ b> A detects absolute information of the Y-axis motor 52 and inputs the detection signal to the input / output unit 26. The drive circuit 43 drives the Z-axis motor 53. The encoder 53A is connected to the Z-axis motor 53 and the input / output unit 26. The encoder 53 A detects absolute information of the Z-axis motor 53 and inputs the detection signal to the input / output unit 26.

  The drive circuit 44 drives the spindle motor 54. The encoder 54 </ b> A is connected to the spindle motor 54 and the input / output unit 26. The encoder 54 </ b> A detects absolute information of the spindle motor 54 and inputs the detection signal to the input / output unit 26. The drive circuit 45 drives the magazine motor 55. The encoder 55 </ b> A is connected to the magazine motor 55 and the input / output unit 26. The encoder 55 </ b> A detects the position information of the magazine motor 55 and inputs the detection signal to the input / output unit 26. The drive circuit 46 drives the table motor 56. The encoder 56 </ b> A is connected to the table motor 56 and the input / output unit 26. The encoder 56 </ b> A detects absolute information of the table motor 56 and inputs the detection signal to the input / output unit 26.

  The drive circuit 48 drives the clamp device 58. The drive circuit 49 drives the display unit 11. The X-axis motor 51, the Y-axis motor 52, the Z-axis motor 53, the main shaft motor 54, the magazine motor 55, and the table motor 56 are servo motors. The encoders 51A to 56A are general absolute encoders, and are position sensors that detect and output an absolute position.

  The electrical configuration of the encoder 53A will be described with reference to FIG. The other encoders 51A, 52A, 54A to 56A are the same as the encoder 53A, and thus the description thereof is omitted. The encoder 53A is attached to the Z-axis motor 53. The encoder 53A includes an encoder control unit 61. The encoder control unit 61 includes an encoder CPU 62 and an encoder memory 63. The encoder CPU 62 exchanges data with the CPU 21 of the numerical control device 20, and controls the encoder 53A according to the control command of the CPU 21. The encoder CPU 62 stores the absolute information of the Z-axis motor 53 in the encoder memory 63 and further outputs it to the numerical controller 20. Therefore, the CPU 21 of the numerical controller 20 can always accurately recognize the position of the spindle head 6 in the Z-axis direction based on the absolute information of the Z-axis motor 53.

  The encoder control unit 61 is connected to the battery 64. The battery 64 supplies power to the encoder control unit 61. If the battery 64 is exhausted or a connector (not shown) connected to the battery 64 is left unattended, the absolute information stored in the encoder memory 63 is lost. When the absolute information stored in the encoder memory 63 is lost, the encoder CPU 62 outputs error information to the numerical controller 20. Therefore, the CPU 21 of the numerical controller 20 does not know the absolute information of the Z-axis motor 53, and can determine that the position adjustment of the Z-axis is necessary. The encoders 51A, 52A, and 54A to 56A also output absolute information or error information of various motors to the numerical controller 20 as needed, as with the encoder 53A.

  Therefore, the CPU 21 of the numerical controller 20 accurately recognizes the position of the spindle head 6 in the X, Y, and Z axis directions based on the absolute information of the X axis motor 51, the Y axis motor 52, and the Z axis motor 53. it can. Further, the CPU 21 of the numerical controller 20 can accurately recognize the magazine number of the tool gripper 19 </ b> A determined by the tool magazine 19 at the tool change position based on the absolute information of the magazine motor 55. Further, the CPU 21 of the numerical controller 20 can accurately recognize which of the pallets P1 and P2 is located in the machining area based on the absolute information of the table motor 56.

  The error information table 231 will be described with reference to FIG. The error information table 231 is stored in the RAM 23 of the numerical controller 20 shown in FIG. The error information table 231 is a data table that stores a flag indicating whether error information has been received from the magazine motor 55, the Z-axis motor 53, the X-axis motor 51, the Y-axis motor 52, and the table motor 56. For convenience of explanation, the magazine motor 55, Z-axis motor 53, X-axis motor 51, Y-axis motor 52, and table motor 56 are simply referred to as magazine axis, Z-axis, X-axis, Y-axis, and QT-axis. There is. For the magazine axis, Z axis, X axis, Y axis, and QT axis, the flag of the axis that has received error information is turned on, and the flag of the axis that has not received error information is turned off. The CPU 21 can easily and quickly recognize which axis's absolute information has been lost by referring to the error information table 231.

  With reference to the flowcharts of FIGS. 5 to 8 and the screen diagrams of FIGS. 9 to 13, the battery exhaustion recovery process executed by the CPU 21 will be described. When the operator turns on the power of the machine tool 1, the CPU 21 of the numerical control device 20 reads the battery exhaustion recovery processing program from the ROM 22 and executes this processing.

  As shown in FIG. 5, the CPU 21 determines whether or not one or more pieces of absolute information have disappeared for each axis (S1). The CPU 21 refers to the error information table 231. When the flags are off for all the axes, none of the absolute information has been lost (S1: NO), so the mode is switched to the manual operation mode (S11), and the manual condition screen is displayed on the display unit 11 (S12). End the process. On the manual condition screen, the operator can change the manual feed speed of each axis and select additional axes (including the QT axis) to be moved. It is also possible to switch to automatic operation mode. The CPU 21 reads the NC program selected by the operator on the operation panel and can perform cutting under the set conditions.

  On the other hand, when error information is received in the magazine axis, Z axis, Y axis, and QT axis, the magazine axis, Z axis, Y axis, and QT axis are turned on as in the error information table 231 shown in FIG. The X axis is off. Since one or more pieces of absolute information have disappeared (S1: YES), the CPU 21 displays an alarm on the display unit 11 (S2) to notify the operator that there is an axis that needs to be adjusted. For example, an alarm display such as “low battery” is displayed together with a message such as “Please switch to manual operation mode to recover”.

  In accordance with the operation of the operation panel by the operator, the CPU 21 switches to the manual operation mode (S3). In S3, when there is no operation for switching to the manual operation mode by the operator, the process waits until the operation is performed, and when the operation is performed, the process proceeds to the next process. The CPU 21 refers to the error information table 231 and identifies the adjustment target axis (S4). The adjustment target axis is an axis that requires position adjustment. An example of position adjustment is return to origin. Referring to the error information table 231, the adjustment target axes are the magazine axis, the Z axis, the Y axis, and the QT axis. CPU21 determines the adjustment order which is an order which performs position adjustment about these four adjustment object axes (S5). In this embodiment, when determining the adjustment order, priority is determined for the adjustment order of each axis. The priority order is the order of the magazine axis, Z axis, X axis, Y axis, and QT axis from the top.

  The reason for adjusting the position of the magazine axis first is that if the turning position of the tool magazine 19 is not correct, the tool magazine 19 and the spindle head 6 may interfere when the spindle head 6 is moved in the Z-axis direction. is there. Next, the reason for adjusting the position of the Z-axis is that if the Z-axis is not raised to the origin position, the spindle or the tool T and the jig on the rotary table 18 may interfere when the rotary table 18 turns. It is. Next, the reason for adjusting the positions of the X-axis and the Y-axis is that if the main shaft and the tool T are not moved outside the turning area of the turntable 18, the front side of the column 5 and the turntable are turned when the turntable 18 turns. This is because 18 may interfere. Finally, when the position of the rotary table 18 is adjusted, the position adjustment of the magazine axis, Z axis, X axis, and Y axis has already been completed, so there is no possibility that the rotary table 18 interferes with the column 5. Therefore, the CPU 21 determines the adjustment order of the magazine axis, the Z axis, the Y axis, and the QT axis, which are the adjustment target axes, in the order of the magazine axis, the Z axis, the Y axis, and the QT axis based on the priority order.

  The CPU 21 displays the battery exhaustion recovery screen 101 shown in FIG. 9 on the display unit 11 (S6). The out-of-battery recovery screen 101 has a first display area 102, a second display area 103, a third display area 104, a fourth display area 105, etc., and a “position information reset” button 108 and a “position of each axis” on the lower side. An “adjustment” button 109 is displayed.

  The first display area 102 displays the recovery step. The recovery steps are: 1. Reset location information. 2. Each axis position adjustment, Three steps of completion. The second display area 103 displays whether or not position adjustment is necessary for each axis. The third display area 104 displays the recovery procedure at each step. In the present embodiment, the second display area 103 displays that position adjustment is necessary for the magazine axis, Z axis, Y axis, and QT axis, and that the X axis is not necessary. Therefore, the operator can recognize that the position adjustment is necessary for the magazine axis, the Z axis, the Y axis, and the QT axis. The fourth display area 105 displays an alarm such as “low battery”.

  The recovery step is 1. In this case, the CPU 21 displays the messages “Please replace the battery” and “Please press the position information reset button” in the third display area 104. The worker who sees this replaces the battery 64 (see FIG. 3) installed in the battery installation section provided on the side surface of the control box 10 with a new one while the power of the machine tool 1 is on. The magazine axis, Z axis, Y axis, and QT axis amplifiers that output the error information output an alarm signal to the numerical controller 20 immediately after the error information is output. The operator presses a “position information reset” button 108 to release the alarm signal of each axis.

  The CPU 21 determines whether or not the operator has pressed the “position information reset” button 108 (S7). Until the “position information reset” button 108 is pressed (S7: NO), the CPU 21 returns to S7 and waits. When the worker presses the “position information reset” button 108 (S7: YES), the CPU 21 executes a position information reset process (S8). The position information reset process is a process of transmitting an alarm release signal to each axis. Each axis that receives the alarm release signal stops outputting the alarm signal all at once.

  As shown in FIG. 9, the CPU 21 displays “2-1. Press the reset key” and “The alarm is released” in the third display area 104. The operator presses a reset key (not shown) of the input key unit 39. The CPU 21 erases the alarm display in the fourth display area 105 (S9). In S9, the process waits until the operator presses the reset key.

  The CPU 21 determines whether or not the operator has pressed the “respective axis position adjustment” button 109 (S10). Until the “adjustment of each axis position” button 109 is pressed (S10: NO), the CPU 21 returns to S10 and stands by. When the operator depresses the “adjustment of each axis” button 109 (S10: YES), the CPU 21 refers to the error information table 231 as shown in FIG. It is determined whether or not magazine axis position adjustment is necessary (S13). If it is not necessary to adjust the position of the magazine axis (S13: NO), the process proceeds to S18 described later. When the position adjustment of the magazine axis is necessary (S13: YES), the CPU 21 displays a position adjustment (magazine) screen 201 shown in FIG. 10 on the display unit 11 (S14).

[Magazine axis position adjustment]
As shown in FIG. 10, the position adjustment (magazine) screen 201 is a guide screen for adjusting the position of the magazine axis. The position adjustment (magazine) screen 201 has a first display area 202, a second display area 203, a third display area 204, a fourth display area 205, and the like. The “adjustment of the axis position” button 207 and the like are displayed. The “To previous step” button 206 is used to return to the previous step screen. The first display area 202 displays the recovery step. The recovery steps are: This is one step of magazine number setting. The second display area 203 displays the magazine number that has been set. The third display area 204 displays a recovery procedure at each step. As a recovery procedure, a message such as “1. Enter the currently assigned magazine number and press the set key.” “The entered number is reflected in the magazine number.” Is displayed. The fourth display area 205 displays the magazine number input by the operator using the input key unit 39.

  The operator uses the input key unit 39 to input the magazine number of the tool gripper 19A that is currently indexed at the tool change position. The entered magazine number is displayed in the fourth display area 205. The CPU 21 determines whether or not the operator has pressed a setting key (not shown) of the input key unit 39 (S15). Until the setting key (not shown) is pressed (S15: NO), the CPU 21 returns to S15 and stands by. When a setting key (not shown) is pressed (S15: YES), the CPU 21 sets the magazine number displayed in the fourth display area 205 (S16). The CPU 21 can reset the correspondence relationship between the number of rotations of the magazine motor 55 and the magazine number by setting the current index position as a reference position where the rotation of the magazine motor 55 is zero. Therefore, the CPU 21 can specify the magazine number based on the number of rotations of the magazine motor 55. The magazine number that has been set is displayed in the second display area 203. The operator can recognize that the setting of the magazine number has been completed. Magazine axis position adjustment is complete. The operator presses the “next axis position adjustment” button 207 to adjust the position of the next axis.

  The CPU 21 determines whether or not the operator has pressed the “next axis position adjustment” button 207 (S17). Until the “next axis position adjustment” button 207 is pressed (S17: NO), the CPU 21 returns to S17 and stands by. When the “next axis position adjustment” button 207 is pressed (S17: YES), the CPU 21 refers to the error information table 231 and determines whether or not the Z axis position adjustment is necessary (S18). When the magazine axis position adjustment is unnecessary (S13: NO), the CPU 21 determines whether or not the Z-axis position adjustment is necessary without performing the processes of S14 to S17 (S18). If it is not necessary to adjust the position of the Z-axis (S18: NO), the process proceeds to S24 in FIG. When the Z-axis position adjustment is necessary (S18: YES), the CPU 21 displays the position adjustment (Z-axis) screen 301 shown in FIG. 11 on the display unit 11 (S19).

[Z-axis position adjustment]
As shown in FIG. 11, the position adjustment (Z-axis) screen 301 is a guide screen for adjusting the position of the Z-axis. The position adjustment (Z-axis) screen 301 includes a first display area 302, a second display area 303, a third display area 304, a fourth display area 305, and the like. A “position determination” button 307, an “adjustment” button 308, a “next axis position adjustment” button 309, a “lower” button 310, an “upper” button 311 and the like are displayed.

  The first display area 302 displays the recovery step. The recovery steps are: This is one step of determining the Z-axis position. The second display area 303 displays the current machine coordinate position of the spindle head 6 in comparison with a mark position (m) described later. The third display area 304 displays a manual condition screen. The fourth display area 305 displays a recovery procedure in each step and an image diagram of the recovery work. 1. As a recovery procedure, a message such as “1-1. Move the Z-axis to the position shown in (n) below by jog operation, etc.” or “1-2. Is displayed.

  The manual condition screen displayed in the third display area 304 will be briefly described. The manual condition screen is a screen that displays the set value of the manual feed speed of each axis. In order from the top, high speed movement speed (XYZ), high speed rotation speed (4), low speed movement speed (XYZ), low speed rotation speed (4), step movement amount (XYZ), step rotation amount (4), spindle speed Display each one.

  The high-speed movement speed (XYZ) is set to the manual speed set in advance in the machine parameters when any of the X, Y, and Z axes is manually moved while the “high-speed movement” key of the input key unit 39 is selected. This is a function of moving at a speed multiplied by the ratio (10% in FIG. 11) displayed on the manual condition screen. As for the high speed rotation speed (4), any of the 4 (QT), 5, 6, 7 and 8 axes set by the parameter as the additional axis manually with the “high speed movement” key of the input key unit 39 selected. This is a function of rotating at a speed obtained by multiplying a manual rotation speed set in advance as a machine parameter by a ratio (10% in FIG. 11) displayed on the manual condition screen when moving. The additional axis indicates the added axis. For example, when a small turntable device is mounted on each of the pallets P1 and P2, the small turntable device is set to 5 axes and 6 axes by parameters. In that case, the 5th and 6th axes are additional axes. The machine tool 1 can add 5 to 8 axes.

  The low speed movement speed (XYZ) is the speed displayed on the manual condition screen when any of the X, Y, and Z axes is moved manually with the “low speed movement” key of the input key unit 39 selected (FIG. 11). This is a function that moves at 50 mm / min. The low-speed rotation speed (4) is a manual condition screen when any of 4 (QT), 5, 6, 7, and 8 axes is manually moved with the “low-speed movement” key of the input key unit 39 selected. This is a function of rotating at the speed indicated in (1) in the figure. The step movement amount (XYZ) is the movement amount displayed on the manual condition screen when any of the X, Y, and Z axes is manually moved with the “step movement” key of the input key unit 39 selected. 11 is a function of moving 0.001 mm).

  The step rotation amount (4) is a manual condition screen when any of 4 (QT), 5, 6, 7, and 8 axes is manually moved while the “step movement” key of the input key unit 39 is selected. This is a function of rotating at the rotation amount (0.001 ° in FIG. 11) displayed in FIG. The spindle rotation speed is a function of rotating the spindle 7 at a speed (100 min-1 in FIG. 11) displayed on the manual condition screen when the “main spindle normal rotation” key of the input key unit 39 is pressed in the manual mode.

  The image of the restoration work is a diagram schematically showing the periphery of the upper end of the Z-axis cover 30 shown in FIG. Two holes 71 and 72 are provided in the vicinity of the upper end of the Z-axis cover 30 at the left and right ends of the front surface of the column 5 so as to be vertically spaced. In the image diagram, the position of the mounting surface at the upper end of the Z-axis cover 30 is indicated by the mark position (m), the height position (n) of the gap between the holes 71 and 72 is indicated by a dotted line, and the mark position (m) (N) represents a state where the same position is obtained. After the operator presses the “adjustment” button 308, referring to the image diagram, the position of the mounting surface of the Z-axis cover 30 is the height position of the gap between the holes 71 and 72 in the Z-axis direction. The “lower” button 310 and the “upper” button 311 are operated to move the spindle head 6 and adjust the position of the spindle head 6.

  The second display area 303 compares and displays the current machine coordinate position of the spindle head 6 and the target coordinate position. The target coordinate position is a reference position. Therefore, the operator can visually confirm the position of the mounting surface of the Z-axis cover 30 so that the current machine coordinate position becomes the target coordinate position, and can determine whether or not the current machine coordinate position becomes the target coordinate position. Therefore, workability is improved. When the current machine coordinate position is the same as the target coordinate position, the mounting surface of the Z-axis cover 30 is the height position of the gap between the holes 71 and 72. In accordance with the restoration procedure, the operator presses the “position determination” button 307 to determine the position of the mounting surface of the Z-axis cover 30.

  The CPU 21 determines whether or not the position of the Z-axis cover 30 is determined (S20). Until the operator presses the “position determination” button 307 (S20: NO), the CPU 21 returns to S20 and stands by. When the “position determination” 307 is pressed, the position of the Z-axis cover 30 is determined (S20: YES), so the CPU 21 sets the Z-axis position (S21). The setting of the Z-axis position is a process of setting the current coordinate position of the spindle head 6 as a reference position where the rotation of the Z-axis motor 53 is zero. Since the Z-axis position adjustment is complete, the CPU 21 displays a message such as "Z-axis position adjustment completed" or "Press the next-axis position adjustment button" in the fourth display area 305. . The operator presses a “next axis position adjustment” button 309 to adjust the position of the next axis.

  The CPU 21 determines whether or not the operator has pressed the “next axis position adjustment” button 309 (S22). Until the “next axis position adjustment” button 309 is pressed (S22: NO), the CPU 21 returns to S22 and stands by. When the “next axis position adjustment” button 309 is pressed (S22: YES), as shown in FIG. 7, the CPU 21 refers to the error information table 231 to determine whether or not the X axis position adjustment is necessary. (S24). If the Z-axis position adjustment is not required (S18 in FIG. 6: NO), the CPU 21 determines whether or not the X-axis position adjustment is necessary without performing the processes in S19 to S22 (S24 in FIG. 7). . In this case, since the position adjustment of the X axis is unnecessary (S24: NO), the process proceeds to S29 in FIG.

[X-axis position adjustment]
When the position adjustment of the X axis is necessary (S24: YES), the CPU 21 displays a position adjustment (X axis) screen (not shown) on the display unit 11 (S25). The position adjustment (X-axis) screen is the same as the position adjustment (Z-axis) screen 301 shown in FIG. 11, and will be described with reference to FIG. The fourth display area 305 displays a recovery procedure at each step in the X-axis position adjustment and an image diagram of the recovery work. Instead of the “lower” button 310, a “left” button and a “right” button instead of the “upper” button 311 are provided. The operator presses the “adjustment” button 308 and then operates the “left” button and the “right” button with reference to the reference position displayed in the image diagram to adjust the position of the spindle head 6 in the X-axis direction. The operator presses a “position determination” button 307.

The CPU 21 determines whether or not the worker has pressed the “position determination” button 307 (S26). Until the “position determination” button 307 is pressed (S26: NO), the CPU 21 returns to S26 and stands by. When the “position determination” button 307 is pressed (S26: YES), the CPU 21 sets the X-axis position (S27). Setting of the X-axis position is processing the X-axis direction of the coordinate position of the current spindle head 6 is set as the reference position the rotation of the X-axis motor 5 1 is 0. Since the X-axis position adjustment is completed, the CPU 21 displays a message such as “Complete the X-axis position adjustment” or “Press the position adjustment button for the next axis” in the fourth display area 305. The operator presses a “next axis position adjustment” button 309 to adjust the position of the next axis.

  The CPU 21 determines whether or not the worker has pressed the “next axis position adjustment” button 309 (S28). Until the “next axis position adjustment” button 309 is pressed (S28: NO), the CPU 21 returns to S28 and waits. When the “next axis position adjustment” button 309 is pressed (S28: YES), the CPU 21 refers to the error information table 231 and determines whether or not the Y axis position adjustment is necessary (S29). If the X-axis position adjustment is unnecessary (S24: NO), the CPU 21 determines whether or not the Y-axis position adjustment is necessary without performing the processes of S25 to S28 (S29). If it is not necessary to adjust the position of the Y-axis (S29: NO), the process proceeds to S35 in FIG. When the Y-axis position adjustment is necessary (S29: YES), the CPU 21 displays a position adjustment (Y-axis) screen 401 shown in FIG. 12 on the display unit 11 (S30).

[Y-axis position adjustment]
As shown in FIG. 12, the position adjustment (Y-axis) screen 401 is a guide screen for adjusting the position of the Y-axis. Similar to the position adjustment (Z-axis) screen 401 shown in FIG. 11, the position adjustment (Y-axis) screen 401 is a first display area 402, a second display area 403, a third display area 404, a fourth display area 405, and the like. On the lower side, “To previous step” button 406, “Position” button 407, “Adjust” button 408, “Adjust next axis position” button 409, “Front side” button 410, “Rear side” button 411 etc. are displayed.

  The first display area 402 displays the recovery step. The recovery steps are: This is one step of determining the Y-axis position. The second display area 403 displays the current machine coordinate position and the target coordinate position of the spindle head 6 side by side for comparison. The third display area 404 displays manual conditions. The fourth display area 405 displays a recovery procedure at each step and an image diagram of the recovery work. 1. As a recovery procedure, a message such as “1-1. Move the Y-axis to the position shown in the following figure (n) by jog operation, etc.” or “1-2. Is displayed.

  The image of the restoration work is a diagram schematically showing the periphery of the mounting surface of the Y-axis telescopic cover 15 shown in FIG. The attachment surface of the Y-axis telescopic cover 15 is an attachment surface of the cover 15A attached to the rear end of the pedestal 5A of the column 5 (the rear end facing the column 5 side). Two screws 81 and 82 are fastened to the left and right side surfaces of the carrier 12 below the pedestal 5A with a space in the front-rear direction. In the image diagram, the position of the mounting surface of the Y-axis telescopic cover 15 is indicated by a mark position (m), the position (n) in the Y-axis direction of the gap between the screws 81 and 82 is indicated by a dotted line, and the mark position (m ) And (n) represent the same position. The operator presses the “adjustment” button 408 and then refers to the image diagram so that the position of the mounting surface of the Y-axis telescopic cover 15 is located in the gap between the screws 81 and 82 in the Y-axis direction. The position of the spindle head 6 is adjusted by operating the “front” button 410 and the “rear” button 411.

  The second display area 403 displays the current machine coordinate position and the target coordinate position of the spindle head 6 side by side for comparison. Therefore, the operator visually confirms the position of the mounting surface of the Y-axis telescopic cover 15 so that the current machine coordinate position becomes the target coordinate position, and determines whether or not the current machine coordinate position becomes the target coordinate position. This improves workability. When the current machine coordinate position is the same as the target coordinate position, the mounting surface of the Y-axis telescopic cover 15 is the position of the gap between the screws 81 and 82. In accordance with the restoration procedure, the operator presses a “position determination” button 407 to determine the position of the mounting surface of the Y-axis telescopic cover 15.

  The CPU 21 determines whether the operator has pressed the “position determination” button 407 (S31). Until the “position determination” button 407 is pressed (S31: NO), the CPU 21 returns to S31 and stands by. When the “position determination” button 407 is pressed (S31: YES), the CPU 21 sets the Y-axis position (S32). The setting of the Y-axis position is a process of setting the current coordinate position of the spindle head 6 as a reference position where the rotation of the Y-axis motor 52 is zero. The Y-axis position adjustment is completed. In the fourth display area 405, the CPU 21 displays a message such as “Y-axis position adjustment has been completed” or “Please press the position adjustment button for the next axis”. The operator presses a “next axis position adjustment” button 409 to adjust the position of the next axis.

  The CPU 21 determines whether or not the operator has pressed the “next axis position adjustment” button 409 (S33). Until the “next axis position adjustment” button 409 is pressed (S33: NO), the CPU 21 returns to S33 and stands by. When the “next axis position adjustment” button 409 is pressed (S33: YES), as shown in FIG. 8, the CPU 21 refers to the error information table 231 and determines whether or not the QT axis position adjustment is necessary. (S35). If the Y-axis position adjustment is unnecessary (S29 in FIG. 7: NO), the CPU 21 determines whether or not the QT-axis position adjustment is necessary without performing the processes in S30 to S33 (S35 in FIG. 8). . When the position adjustment of the QT axis is unnecessary (S35: NO), the process proceeds to S41 described later. When the QT axis position adjustment is necessary (S35: YES), the CPU 21 displays the position adjustment (QT axis) screen 501 shown in FIG. 13 on the display unit 11 (S36).

[QT axis position adjustment]
As shown in FIG. 13, a position adjustment (QT axis) screen 501 is a guide screen for adjusting the position of the QT axis. The position adjustment (QT axis) screen 501 has a first display area 502, a second display area 503, a third display area 504, a fourth display area 505, a fifth display area 506, a sixth display area 507, and the like. On the lower side, a “go to previous step” button 508, a “position determination” button 509, a “next axis position adjustment” button 510, a “activate recovery operation” button 511, and the like are displayed.

  The first display area 502 displays a recovery step. The recovery steps are: 1. Enter the outer pallet number. 2. outer pallet stopper, 3 steps of QT axis position determination. The second display area 503 displays the current recovery state of the QT axis. “Not completed (standby)” is displayed when it is not completed, and “Completed” is displayed when it is completed. The third display area 504 displays the current machine coordinate positions of the X axis, Y axis, Z axis, and QT axis. At this time, since the position adjustment of the X axis, the Y axis, and the Z axis has already been completed, the machine coordinate positions of the X axis, the Y axis, and the Z axis are the respective reference positions. The fourth display area 505 displays manual conditions. The fifth display area 506 displays the recovery procedure at each step. 1. As a recovery procedure, a message such as “Enter a pallet number close to the outside and press the set key.” Is displayed. The sixth display area 507 displays an input column for palette numbers close to the outside. Pallet P1 is pallet number 1, and pallet P2 is pallet number 2.

  The operator uses the input key unit 39 to input the pallet number of the pallet that is close to the outside of the rotary table 18 (the side opposite to the column 5 side). For example, in the state shown in FIG. 1, the pallet of the rotary table 18 located outside the machine tool 1 is the pallet P2. The pallet number close to the outside is 2. The operator inputs the pallet number = 2 and presses the setting key of the input key unit 39. Here, on the right side of the sixth display area 507, a message “Recovery operation is disabled” is displayed. When the recovery operation is invalid, the turntable 18 cannot turn. It is possible to prevent the turntable 18 from turning automatically by the operator.

  When the operator presses the “Enable recovery operation” button 511, the CPU 21 enables the recovery operation and turns off the display of “Recovery operation is disabled” in the sixth display area 507. The operator presses a setting key (not shown) of the input key unit 39 according to the recovery procedure of the fifth display area 506. The CPU 21 determines whether or not the operator has pressed the setting key (S37). Until the setting key (not shown) is pressed (S37: NO), the CPU 21 returns to S37 and stands by. When the setting key is pressed (S37: YES), the CPU 21 restores the first display area 502. Then, the rotary table 18 is turned, and the pallet P2 located outside is stopped (S38). The CPU 21 positions the rotary table 18 at the 180 degree position. The clamp device 58 clamps and fixes the rotary table 18 positioned at the 180 degree position. The CPU 21 performs a recovery step 3. Migrate to Recovery step 3. Is QT axis position determination. The CPU 21 displays a message such as “Please press the position determination button” in the fifth display area 506. The operator presses a “position determination” button 509.

  When the operator presses the “position determination” button 509, the CPU 21 executes the position setting of the QT axis (S39). The QT axis position setting is a process of setting the current position of the rotary table 18 as a reference position where the rotation of the table motor 56 is zero. Since the QT axis position adjustment is completed, the second display area 503 displays “completed” to notify the operator of the current recovery state of the QT axis. In the fifth display area 506, the CPU 21 displays a message such as “QT axis position adjustment has been completed.” “Please press the position adjustment button for the next axis to end the battery exhaustion recovery process”. . The operator presses the “next axis position adjustment” button 510 in order to end the battery exhaustion recovery process.

  The CPU 21 determines whether or not the operator has pressed the “next axis position adjustment” button 510 (S40). Until the “next axis position adjustment” button 510 is pressed (S40: NO), the CPU 21 returns to S40 and stands by. When the “next axis position adjustment” button 510 is pressed (S40: YES), the CPU 21 displays the battery exhaustion recovery screen 101 shown in FIG. 9 again. The second display area 103 of the battery exhaustion recovery screen 101 displays that position adjustment is not necessary for each axis. As a completion announcement, the CPU 21 outputs a message such as “Battery out recovery work has been completed” to the display unit 11 (S42), and ends this process. The operator can confirm the message displayed on the display unit 11 and confirm that the battery exhaustion recovery work has been completed.

  As described above, the numerical control device 20 of the present embodiment controls the machine tool 1. The machine tool 1 includes an X-axis motor 51, a Y-axis motor 52, a Z-axis motor 53, a magazine motor 55, and a table motor 56 on a drive shaft. The encoders 51 </ b> A to 53 </ b> A, 55 </ b> A, 56 </ b> A detect absolute information of each axis, store it in the encoder memory 63, and output it to the numerical controller 20. The numerical controller 20 matches the machine coordinates of each axis based on the absolute information of each axis, and drives and controls each motor. When the absolute information stored in the encoder memory 63 is lost, the position of each axis needs to be adjusted when the machine tool 1 is started. The numerical control device 20 identifies the adjustment target axis that needs to be adjusted, and determines the order in which the adjustment of the position of the adjustment target axis is performed based on a preset priority order. The priority order is the tool magazine first, and then the Z-axis, X-axis, Y-axis, and QT-axis. The numerical control device 20 displays the position adjustment (magazine) screen 201, the position adjustment (Z axis) screen 301, the position adjustment (Y axis) screen 401, and the position adjustment (QT axis) screen 501 on the display unit 11 based on the determined order. In this order, the operator adjusts the position of the adjustment target axis in order on each screen. Therefore, the numerical control device 20 can prevent the operator from making a mistake in the order of adjusting the position of the adjustment target axis. Since the position adjustment of the index axis of the tool magazine 19 is performed first, the spindle head 6 does not interfere with the tool magazine 19 when the spindle head 6 is moved in the Z-axis direction. The operator does not need to consider the order of position adjustment of the adjustment target axis.

  In the present embodiment, the position of the spindle head 6 in the Z-axis direction is adjusted and then the position of the spindle head 6 is adjusted in the Y-axis direction. Does not interfere with.

  In the present embodiment, when the machine tool 1 is started, the operator displays whether or not position adjustment is necessary for each axis in the second display area 103 of the battery exhaustion recovery screen 101 displayed on the display unit 11. The operator can recognize the axis whose position information needs to be adjusted because the absolute information is lost for which axis, so that the work can be smoothly performed.

  In the present embodiment, each of the axes in the battery exhaustion recovery screen 101, the position adjustment (magazine) screen 201, the position adjustment (Z axis) screen 301, the position adjustment (Y axis) screen 401, and the position adjustment (QT axis) screen 501 Since the recovery procedure is displayed for the position adjustment, the operator can perform the position adjustment of the adjustment target axis without mistake by following the work procedure displayed on the display unit.

  The present invention is not limited to the above embodiment, and various modifications can be made. The machine tool of the above embodiment is provided with the rotary table device 8, but may be provided with a non-rotating table. In this case, since the numerical control device 20 does not need to control the QT axis, the magazine axis, the Z axis, the X axis, and the Y axis are controlled. For the battery exhaustion recovery process, the position adjustment of the QT axis is not necessary. .

  In the above embodiment, the X-axis position adjustment is performed between the Z-axis and Y-axis position adjustments, but may be performed at any time after the magazine axis position adjustment.

  Further, in the position adjustment (Z-axis) screen 301 and the position adjustment (Y-axis) screen 401 in the above embodiment, image diagrams of the restoration work are displayed, respectively, but the alignment portion and method are limited to the above embodiment. do not do.

1 Machine Tool 20 Numerical Control Device 21 CPU
61 Encoder control unit 62 Encoder CPU
63 Encoder memory 52 Y-axis motor 53 Z-axis motor 55 Magazine motor 56 Table motor 52A, 53A, 55A, 56A Encoder

Claims (5)

A spindle head provided with a spindle on which a tool can be mounted, which is provided so as to be movable at least in the Y-axis direction, which is the longitudinal direction of the machine tool, and the Z-axis direction, which is the vertical direction, and the tool is indexed to a tool change position near the spindle. A tool magazine that can be supported, a Y-axis motor that drives the spindle head in the Y-axis direction, a Z-axis motor that drives the spindle head in the Z-axis direction, a magazine motor that drives the tool magazine, and the Y A machine tool including a Y-axis encoder that detects position information of an axis motor, a Z-axis encoder that detects position information of the Z-axis motor, and a magazine encoder that detects position information of the magazine motor. Yes, based on the position information detected by the Y-axis encoder, the Z-axis encoder, and the magazine encoder, the Y-axis motor, the Z-axis module, Motor, and the numerical control apparatus having a control means for respectively controlling the magazine motor,
The Y-axis encoder, the Z-axis encoder, and the magazine encoder each store the detected position information in its own storage device, and when the machine tool is started, the own storage device stores the position information. A device that outputs error information externally if not
The control means includes
Receiving means for receiving the error information output by the Y-axis encoder, the Z-axis encoder, and the magazine encoder at the time of starting the machine tool;
Based on the error information received by the receiving means, among the position of the spindle head in the Y-axis direction, the position of the spindle head in the Z-axis direction, and the position of the index axis of the tool magazine, the Y-axis encoder, A specifying means for specifying an adjustment target axis that is an operation axis that requires position adjustment for consistency with the position information detected by each of the Z-axis encoder and the magazine encoder;
For the adjustment target axis specified by the specifying means, a priority order of the position of the index axis, the position of the spindle head in the Z-axis direction, and the position of the spindle head in the Y-axis direction, or the position of the index axis Determining means for determining the order in which the position adjustment of the adjustment target axis is performed based on the priority order of the position of the spindle head in the Y-axis direction and the position of the spindle head in the Z-axis direction;
Based on the order determined by the determination means, work execution means for causing an operator to execute the position adjustment of the adjustment target axis ;
Based on the result specified by the specifying means, information regarding whether the position adjustment is necessary or unnecessary for the position of the index shaft, the position of the spindle head in the Z-axis direction, and the position of the spindle head in the Y-axis direction. A numerical control apparatus comprising: first display control means for displaying certain position adjustment information on a display unit . The determining means includes
Determining the order of the adjustment target axes specified by the specifying means according to the priority order of the position of the indexing axis, the position of the spindle head in the Z-axis direction, and the position of the spindle head in the Y-axis direction; The numerical control apparatus according to claim 1. The work execution means includes
2. The apparatus according to claim 1, further comprising: a second display control unit configured to display, on the display unit, a procedure for adjusting the position of the adjustment target axis in the order determined by the determination unit for each of the adjustment target axes. The numerical control apparatus according to 1 or 2 . Based on the output of the Y-axis encoder or the Z-axis encoder that output the error information, the current machine coordinate position where the relationship with the reference position for the position adjustment in the Y-axis direction or the Z-axis direction of the spindle head is unknown Current coordinate position specifying means for specifying
The work execution means includes
When the position adjustment of the position of the spindle head in the Y-axis direction or the position of the spindle head in the Z-axis direction is performed by the operator, the machine coordinate position specified by the current coordinate position specifying means, numerical control device according to any one of 3 the target position is a coordinate position of the target position adjusting claims 1, characterized in that it comprises a third display control means for displaying on the display unit. The numerical controller is
A rotary table that holds a workpiece below the spindle head and can rotate forward and backward in the horizontal direction;
A table motor for driving the rotary table;
The position information of the table motor is detected and the detected position information is stored in its own storage device. When the machine tool is started up, error information is displayed if the storage device does not store the position information. Controlling the machine tool further comprising a table encoder for outputting,
The control means includes
Based on the position information detected by the Y-axis encoder, the Z-axis encoder, the magazine encoder, and the table encoder, respectively, the Y-axis motor, the Z-axis motor, the magazine motor, and the table encoder are controlled,
The receiving means includes
Receiving the error information output by the Y-axis encoder, the Z-axis encoder, the magazine encoder, and the table encoder at the time of starting the machine tool;
The specifying means is:
Based on the error information received by the receiving means, the position of the spindle head in the Y-axis direction, the position of the spindle head in the Z-axis direction, the position of the indexing shaft, and the rotational position of the rotary table, Identify the adjustment target axis that needs the position adjustment for consistency with the position information detected by the Y-axis encoder, the Z-axis encoder, the magazine encoder, and the table encoder,
The determining means includes
For the adjustment target axis specified by the specifying means, the position of the indexing axis, the position of the spindle head in the Z-axis direction, the position of the spindle head in the Y-axis direction, and the priority order of the rotation position of the rotary table, Alternatively, the position adjustment of the adjustment target shaft is performed based on the priority order of the position of the index shaft, the position of the spindle head in the Y-axis direction, the position of the spindle head in the Z-axis direction, and the rotational position of the rotary table. numerical control device according to any one of determining the order of execution of the preceding claims, wherein 4.

Images