JP2010238045A - Numerical control apparatus for machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a numerical control apparatus for a machine tool, certainly image-displaying a machining position of a manually operated feeding mechanism when manually operating the desired feeding mechanism to move a tool. <P>SOLUTION: In this numerical control apparatus for the machine tool, when a worker selects the feeding mechanism by a feeding mechanism selection switch of a manual pulse generator, it is decided by a present position display detection means whether or not selection information of the feeding mechanism selected by the worker is included in kind information of the feeding mechanism stored by a present information storage area (step S40). When the feeding mechanism selected by the worker is not included, coordinates of the machining position of the feeding mechanism are displayed on a display, and display data of the display and the selection information of the feeding mechanism are stored in the present information storage area (step S45). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a numerical control device for a machine tool, and more particularly, to a numerical control device for a machine tool that can automatically switch a screen displayed on a display device.

  2. Description of the Related Art Conventionally, a machine tool capable of numerical control (so-called NC control) relatively moves a tool and a workpiece in each axial direction in an XYZ orthogonal coordinate system. The numerical control device creates a machining program based on the coordinate value of the orthogonal coordinate system indicating the machining position of the tool. The numerical control device can perform machining such as milling or drilling on the workpiece by executing the machining program. The machine tool includes a display device and has a function of displaying a tool path and the like in a workpiece machining program.

  The machine tool described in Patent Document 1 includes a display unit on the upper right side of the machine body. The display unit displays numerical values of the movement amounts of the X-axis feed mechanism, the Y-axis feed mechanism, and the Z-axis feed mechanism. The machine tool is provided with a manual handle corresponding to each feed mechanism for moving the tool in the direction of each of the X, Y, and Z axes. The manual handle has a built-in manual pulse generator. When the operator operates the manual handle of each feed mechanism, the feed motor is driven to move each feed mechanism.

JP-A-6-143091

  A conventional machine tool such as Patent Document 1 switches and displays a large amount of information on a display unit. In order to create a machining program, the operator determines the coordinate position indicating the machining origin or machining position by operating the manual handle, and when trying to input the determined coordinate position, the tool corresponding to the feed mechanism operated by the handle The machining position may not be displayed on the display unit. When the processing position of the tool corresponding to the feed mechanism operated by the handle is not displayed on the display unit, the operator needs to switch the screen display so that the processing position is displayed on the display unit by operating the display changeover switch. .

  In this case, if the operator forgets the method of switching the screen display of the display unit, there is a problem that it takes time to display the machining position corresponding to the feed mechanism during the handle operation on the display unit. If the operator makes a mistake in switching the screen display, the machine tool performs an unexpected operation, and there is a problem that the work is damaged or the tool is damaged.

  An object of the present invention is to provide a numerical control device for a machine tool that can reliably display the processing position of a manually operated feed mechanism on a screen when a tool is moved by manually operating a desired feed mechanism. .

  According to the first aspect of the present invention, there are provided a plurality of feed mechanisms for moving the tool and the workpiece relative to each other, a movement instruction means for instructing movement to a desired feed mechanism from the plurality of feed mechanisms, and an instruction by the movement instruction means In a numerical control device for a machine tool comprising display means for displaying information relating to, a movement instruction detecting means for detecting whether or not movement of the feed mechanism is instructed by the movement instruction means, and a current position of the feed mechanism Current position detecting means for detecting the current position, feed mechanism display detecting means for detecting whether or not the current position of the feed mechanism detected by the current position detecting means is displayed on the display means, and the movement instruction detecting means When a movement instruction of the feed mechanism is detected from the movement instruction means, the feed mechanism display detection means displays the current position of the feed mechanism on the display means. Is that no is characterized in that a display screen switching means for displaying on said display means the current position of the feed mechanism in which the current position detection means detects if it is detected.

  According to this invention, the movement instruction detecting means detects that there is an instruction to move the feed mechanism by the movement instruction means. When the movement instruction detection unit detects an instruction to move the feed mechanism, the feed mechanism display detection unit detects whether or not the current position of the feed mechanism detected by the current position detection unit is displayed on the display unit. When the feed mechanism display detecting means detects that the current position of the feed mechanism is not displayed on the display means, the display screen switching means displays the current position of the feed mechanism on the display means.

  According to a second aspect of the present invention, in addition to the first aspect of the present invention, in addition to the first aspect, the display that is displayed by the display means before the movement instruction detection means detects an instruction to move the feed mechanism from the movement instruction means. Display information storage means for storing information, feed mechanism movement end detection means for detecting the end of movement of the feed mechanism, and the display information when the feed mechanism movement end detection means detects the end of movement of the feed mechanism It further comprises storage information display switching means for displaying the display information stored in the storage means on the display means.

  According to this invention, the display information displayed on the display means is stored before the movement of the feeding mechanism by the display information storage means. When the end of movement of the feed mechanism is detected by the feed mechanism movement end detection means, the display information stored in the display information storage means is displayed.

  According to a third aspect of the present invention, in addition to the first or second aspect of the invention, the plurality of feed mechanisms include an X feed mechanism and a Y feed mechanism for feeding in the X direction and the Y direction for moving the tool or workpiece in a horizontal plane. , A Z feed mechanism for feeding in the vertical direction with respect to the horizontal plane and other feed mechanisms, and the movement instructing means is an arbitrary one of the X feed mechanism, the Y feed mechanism, the Z feed mechanism and other feed mechanisms. It is a manual pulse generator comprising selection means capable of selecting a feed mechanism and generation means for generating a movement amount with respect to the feed mechanism selected by the selection means.

  According to the present invention, the movement of the feed mechanism is instructed by the manual pulse generator including the selecting means for selecting the feed mechanism and the generating means for generating a movement amount for the feed mechanism.

  According to a fourth aspect of the invention, in addition to the third aspect of the invention, the information related to the instruction by the manual pulse generator includes position information of the X feed mechanism, the Y feed mechanism, the Z feed mechanism, and other feed mechanisms, Display data storage means for storing a plurality of display data for displaying the information on the display means in different formats, and for each of the X feed mechanism, Y feed mechanism, Z feed mechanism and other feed mechanisms Display setting means capable of setting display data to be displayed on the display means from among a plurality of display data, and the X-feed mechanism, Y-feed mechanism, Z-feed mechanism from the manual pulse generator by the movement instruction detection means; When an instruction to move the other feed mechanism is detected, the display data set by the display setting means for the feed mechanism selected by the selection means is displayed on the display means. Characterized by comprising a display data switching means that.

  According to this invention, the display data storage means stores the information of the X feed mechanism, the Y feed mechanism, the Z feed mechanism, and other feed mechanisms as a plurality of different types of display data. The display setting means sets display data to be displayed on the display means from among the display data for each feeding mechanism. When there is an instruction for movement to the feed mechanism selected by the selection means of the manual pulse generator, the display data switching means displays the set display data on the display means.

  According to a fifth aspect of the present invention, in addition to the fourth aspect of the present invention, the plurality of display data include the current positions of the X feed mechanism, the Y feed mechanism, the Z feed mechanism, and other feed mechanisms on the display means. It has enlarged display data to be enlarged and displayed.

  According to this invention, the display data storage means has the enlarged display data as the display data to be stored.

  According to the first aspect of the present invention, when the movement instruction detecting unit detects an instruction to move the feeding mechanism, the feeding mechanism display detecting unit detects whether or not the current position of the feeding mechanism is displayed on the display unit. When it is detected that the current position of the feed mechanism is not displayed on the display means, the display screen switching means displays the current position of the feed mechanism on the display means. This eliminates the need for the operator to switch the screen display of the display means. The work efficiency can be improved, and an erroneous operation during the conventional display switching work can be prevented.

  According to the invention of claim 2, the display information storage means stores the display information displayed by the display means before the movement of the feeding mechanism. When the feed mechanism movement end detection means detects the end of movement of the feed mechanism, the display information stored in the display information storage means is displayed. The display information displayed by the display means before the movement of the feeding mechanism can be displayed after the movement of the feeding mechanism is completed. Therefore, after the movement of the feed mechanism is completed, the operator does not need to return to the screen display that was displayed before the movement of the feed mechanism, so that the work efficiency can be improved and erroneous operation at the time of switching can be prevented. be able to.

  According to the invention of claim 3, the selecting means for selecting the feeding mechanism from the X feeding mechanism, the Y feeding mechanism, the Z feeding mechanism and other feeding mechanisms, and the generating means for generating a movement amount with respect to the feeding mechanism are provided. A manual pulse generator was provided. Since only one manual pulse generator can instruct the movement of the X feed mechanism, the Y feed mechanism, the Z feed mechanism, and other feed mechanisms, the operation becomes easy.

  According to the invention of claim 4, the display data storage means stores the information of the X feed mechanism, the Y feed mechanism, the Z feed mechanism and other feed mechanisms as a plurality of different types of display data. The display setting means can set display data in a desired format from the display data for each feeding mechanism. When the movement is instructed to a specific feeding mechanism, display data in a format desired by the operator can be displayed on the display means. Accordingly, it is not necessary for the operator to switch the screen display, so that an erroneous operation can be prevented, and display data can be displayed in a desired format, so that work efficiency can be improved.

  According to the invention of claim 5, as the display data to be displayed when the display data storage means is instructed to move from the respective feed mechanisms by the manual pulse generator, the X feed mechanism, the Y feed mechanism, and the Z feed mechanism. Since the enlarged display data for enlarging and displaying the current position of the other feed mechanism is stored, the current position of the feed mechanism can be enlarged and displayed. Even when the operator is away from the display means, the display contents can be easily confirmed, and the work efficiency can be improved.

It is a front view of the machine tool provided with the numerical control device of one embodiment of the present invention. It is a perspective view of the machine main body of a machine tool. It is a block diagram of an X-axis ball screw mechanism. It is an external view of a manual pulse generator. It is a perspective view of an index table. It is a block diagram which shows the electric constitution of a numerical controller. It is explanatory drawing which shows the memory area of RAM. It is a figure which shows the display data of a present position screen. It is a figure which shows the display data of a manual condition screen. It is a figure which shows the display data of an enlarged display screen. It is a flowchart which shows operation | movement when a manual pulse generator is operated. It is a figure which shows a display setting screen. It is a flowchart in a display setting process.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  A numerical control device 100 (see FIG. 6) of the present embodiment is provided in the machine tool 1. The numerical control device 100 controls a machining operation performed on the workpiece (not shown) by the machine tool 1 by executing a machining program including an array of instruction blocks having control commands.

  First, the configuration of the machine tool 1 provided with the numerical control device 100 will be described.

  As shown in FIGS. 1 and 2, the machine tool 1 includes a base 2 that is a cast iron base, a machine body 3 provided on the top of the base 2, and a splash cover 4 fixed on the top of the base 2. The main constituent. The machine body 3 performs workpiece cutting (for example, milling or drilling). The base 2 is a substantially rectangular parallelepiped casting that is long in the Y-axis direction (the depth direction of the machine body 3). The lower four corners of the base 2 are respectively provided with leg portions 2a that can be adjusted in height.

  As shown in FIG. 1, the splash cover 4 is formed in a substantially rectangular parallelepiped box shape covering the machine body 3 and the upper part of the base 2. The splash cover 4 is fixed to the upper part of the base 2. The splash cover 4 has an opening (not shown) on the front surface.

  The machine tool 1 is provided with a pair of slide-type opening / closing doors 5 and 6 that open and close the opening of the splash cover 4. The open / close doors 5 and 6 are provided with rectangular glass window portions 5a and 6a, respectively, at substantially the center. The open / close doors 5, 6 are provided with a handle 5 b at the right end of the open / close door 5 and with a handle 6 b at the left end of the open / close door 6. When the operator opens these grip portions 5b and 6b in directions away from each other, the opening portion is opened. By opening the opening, the operator can attach and detach the workpiece to and from the table 10 on the base 2.

  The machine tool 1 is provided with an operation panel 80 on the right side of the front opening. The operation panel 80 has a rectangular shape in front view for operating the machine tool 1. The operation panel 80 includes a keyboard 81 having a numeric keypad and various operation keys, and a display 82 as display means. The display 82 is for displaying an execution operation of a setting screen or a program related to a feed mechanism, which will be described later, and is provided on the upper portion of the keyboard 81.

  The machine tool 1 includes a manual pulse generator 23 as a movement instruction means below the operation panel 80. As shown in FIG. 4, the manual pulse generator 23 includes a handle 231 (corresponding to a generation unit) that can rotate forward and backward, a magnification selection switch 232, and a feed mechanism selection switch 233 as a selection unit. The manual pulse generator 23 outputs a pulse signal according to the operation amount of the handle 231. The magnification selection switch 232 determines the weight of one pulse of the pulse signal. The amount of movement of the feed mechanism in one pulse of the pulse signal changes according to the determined weight. In this embodiment, the weight is 1 time, 10 times, or 100 times.

  The feed mechanism selection switch 233 can select an arbitrary feed mechanism from among an X feed mechanism, a Y feed mechanism, a Z feed mechanism, and other feed mechanisms (selected position “4” in FIG. 4). Further, the prohibition of the output of the pulse signal from the manual pulse generator 23 (the selection position “OFF” in FIG. 4) can be selected.

  Next, the machine body 3 will be described.

  As shown in FIG. 2, the machine main body 3 is on the upper side of the base 2, and the machine main body 3 cuts the workpiece based on a machining program. The machine body 3 includes a column 16, a spindle head 7, a spindle 9, a tool changer 20, and a table 10 as main constituents. The rectangular parallelepiped column 16 is fixed to the upper surface of the column seat 17 at the rear of the base 2 and extends vertically upward. The main shaft head 7 supports the main shaft 9 in a rotatable manner.

  The tool changer 20 is provided on the right side of the spindle head 7. The tool changer 20 holds and holds a tool magazine 21 that stores a plurality of tool holders (not shown) that support the tool, a tool holder attached to the spindle 9, and another tool holder arranged at the tool change position. And a tool change arm 22 for changing. The tool magazine 21 includes a plurality of tool pots (not shown) that support the tool holder, and a transport mechanism (not shown) that sequentially transports the tool pots to the tool change position of the tool magazine 21.

  The table 10 is provided on the upper part of the base 2. The table 10 fixes the work so as to be detachable. A box-shaped control box 19 is provided on the back side of the column 16. The control box 19 includes a numerical control device 100 of the present invention that controls the operation of the machine tool 1 inside thereof.

  Next, the X feed mechanism, the Y feed mechanism, the Z feed mechanism, and other feed mechanisms will be described.

  As shown in FIG. 2, the machine tool 1 is provided with a rectangular parallelepiped support base 12 on the lower side of the table 10. The support base 12 includes a pair of X-axis feed guides (not shown) extending along the X-axis direction (the left-right direction of the machine body 3). The pair of X-axis feed guides support the table 10 so as to be movable along the X-axis feed guides.

  As shown in FIG. 3, a nut portion 51a is arranged on the lower surface of the table 10, and this nut portion 51a is screwed with an X-axis ball screw shaft 51 connected to an X-axis feed motor 71 (see FIG. 6). A direction feed mechanism is configured. A fixed bearing 53a fixed to the support base 12 supports an end 52a of the X-axis ball screw shaft 51 on the X-axis feed motor 71 side, and a movable bearing 53b supports an end 52b on the opposite side.

  The base 2 includes a pair of Y-axis feed guides extending along the longitudinal direction. The pair of Y-axis feed guides support the support base 12 so as to be movable along the Y-axis feed guides. An X-axis feed motor 71 is provided on the support base 12, and a Y-axis feed motor 72 is provided on the base 2 below the support base 12.

  The Y-direction feed mechanism is the same mechanism as the X-direction feed mechanism, and a Y-axis ball in which a nut portion (not shown) provided on the lower surface of the support base 12 is connected to a Y-axis feed motor 72 (see FIG. 6). It is the structure screwed with the screw shaft.

  As shown in FIG. 2, telescopic covers 13 and 14 that contract in a telescopic manner cover the X-axis feed guide on both the left and right sides of the table 10. A telescopic cover 15 and a Y-axis rear cover (not shown) cover the Y-axis feed guide before and after the support base 12, respectively. The telescopic covers 13, 14, 15 and the Y-axis rear cover always cover the X-axis feed guide and the Y-axis feed guide regardless of whether the table 10 moves in either the X-axis direction or the Y-axis direction. Therefore, the telescopic covers 13, 14, 15 and the Y-axis rear cover prevent chips, coolant liquid, and the like scattered from the processing area from falling on the guides of the respective feeding mechanisms.

  As shown in FIG. 2, the machine main body 3 is provided with a Z-direction feeding mechanism for moving the spindle head 7 in the Z-axis direction (the vertical direction of the machine main body 3) on the front side of the column 16. The Z-direction feed mechanism includes a Z-axis ball screw shaft (not shown), and the spindle head 7 is connected to a Z-axis ball screw shaft extending in the vertical direction by a nut portion (not shown). This nut portion forms a Z-direction feed mechanism in cooperation with the Z-axis ball screw shaft.

  The other feeding mechanisms depend on the workpiece rotating mechanism 24 that rotates the workpiece around an axis parallel to at least one of the X direction, the Y direction, and the Z direction, and the machine tool 1 to be controlled. The feeding mechanism added as appropriate corresponds to this.

  As shown in FIG. 5, the workpiece rotation mechanism 24 is fixed on the table 10, and the workpiece rotation axis of the workpiece rotation mechanism 24 extends along a direction perpendicular to the axis of the main shaft 9. A rotary table 25 is fixed to the end of the work rotation shaft. The rotary table 25 includes a clamp device (not shown), and holds the workpiece detachably through the clamp device. The work rotation mechanism 24 is configured to rotationally drive the rotary table 25 by a drive motor 75 provided therein. Accordingly, the work rotation mechanism 24 can rotate the work in the forward and reverse directions around the work rotation axis, and can position the work at an arbitrary position. In the embodiment of FIG. 5, the workpiece rotation axis extends along an axis parallel to the Y axis (referred to as the B axis).

  Next, the electrical configuration of the numerical controller 100 will be described.

  As shown in FIG. 6, the numerical control device 100 is configured to include a microcomputer, and includes a CPU 110 that performs control, a ROM 111, a RAM 112, and an input / output interface 113, each connected via a bus 114. is doing. The X-axis feed control unit 71a, the Y-axis feed control unit 72a, the Z-axis feed control unit 73a, the main shaft control unit 74a, and the B-axis drive control unit 75a are respectively connected to the X-axis feed motor 71, via servo amplifiers 71c to 75c. The Y-axis feed motor 72, the Z-axis feed motor 73, the main shaft motor 74, and the B-axis drive motor 75 are connected. The input / output interface 113 connects the keyboard 81, the display 82, and the manual pulse generator 23.

  The ROM 111 is provided with a main control program for causing the machining program of the machine tool 1 to function, a control program area for storing a control program for displaying a current position of a feed mechanism, which will be described later, and the like.

  As shown in FIG. 7, the RAM 112 stores the numerical control program area 120 in which the workpiece machining program is stored, and the coordinates of the machining position corresponding to each type of feed mechanism in the display data displayed on the display 82. And a display data storage area 122 (corresponding to display data storage means) that stores information related to the display data shown in FIGS. The RAM 112 includes a current information storage area 123 for storing display data currently displayed on the display 82 and type information of the feeding mechanism, and a display before switching when switching the display 82 to the display of another feeding mechanism. A display information storage area 125 (corresponding to display information storage means) for storing 82 display data and type information of the feed mechanism is provided. The RAM 112 is provided with a display setting storage area 124 for storing parameter information regarding display data to be displayed on the display 82, which is set by the operator for each of the feeding mechanisms, and other data areas. It is. Details will be described later.

  The X-axis feed motor 71 and the Y-axis feed motor 72 are for moving the table 10 in the X-axis direction and the Y-axis direction, respectively. The Z-axis feed motor 73 moves the spindle head 7 in the Z-axis direction. The main shaft motor 74 rotates the main shaft 9. The B-axis drive motor 75 rotates the rotary table 25 of the work rotation mechanism 24. Hereinafter, the X-axis feed motor 71, the Y-axis feed motor 72, the Z-axis feed motor 73, the main shaft motor 74, and the B-axis drive motor 75 are collectively referred to as motors 71 to 75. The motors 71 to 75 include encoders 71b to 75b that detect the respective rotation angles.

  The X-axis feed control unit 71a, the Y-axis feed control unit 72a, the Z-axis feed control unit 73a, the main shaft control unit 74a, and the B-axis control unit 75a receive a movement command amount from the CPU 110 and receive a current command amount (motor torque). Command value) is output to the servo amplifiers 71c to 75c. The servo amplifier receives this command and outputs a drive current to the motors 71 to 75. Hereinafter, the X-axis feed control unit 71a, the Y-axis feed control unit 72a, the Z-axis feed control unit 73a, the main shaft control unit 74a, and the B-axis control unit 75a are collectively referred to as motor control units 71a to 75a.

  The motor control units 71a to 75a receive position feedback signals from the encoders 71b to 75b and perform position feedback control. In the present embodiment, encoders 71b to 75b that output position feedback signals correspond to current position detection means.

  Differentiators 71d to 75d differentiate the position feedback signals output from the encoders 71b to 75b to convert them into speed feedback signals, and output the speed feedback signals to the motor control units 71a to 75a.

  The motor controllers 71a to 75a perform speed feedback control based on the speed feedback signal output from the differentiators 71d to 75d. Current detectors 61b to 64b detect drive currents output from servo amplifiers 71c to 75c to motors 71 to 75, respectively. The current detectors 71e to 75e feed back the drive current to the motor control units 71a to 75a. The motor control units 71a to 75a perform current (torque) control based on the fed back drive current.

  The manual pulse generator 23 outputs to the input / output interface 113 a pulse signal obtained from the magnification specified by the magnification selection switch 232 and the rotation angle of the handle 231 and a selection signal from the feed mechanism selection switch 233. The CPU 110 issues a movement command for moving the feed mechanism selected by the feed mechanism selection switch 233 based on the selection signal output from the manual pulse generator 23.

  Next, information regarding display data stored in the display data storage area 122 will be described.

  As shown in FIGS. 8 to 10, the display data storage area 122 stores information for displaying a current position screen, a manual condition screen, and an enlarged display screen (corresponding to enlarged display data) on the display 82. .

  The current position screen is a screen that displays the current state of the machine tool, such as the coordinate value of the current position indicating the machining position corresponding to each feed mechanism, the feed speed state of the feed mechanism, and the states of the open / close doors 5 and 6. . The manual condition screen is a screen that displays the operation conditions of the machine tool such as the coordinate value of the current position indicating the machining position corresponding to each manually input feed mechanism and the operation conditions related to the movement of the feed mechanism. The enlarged display screen is a screen that enlarges and displays only the coordinate value of the current position indicating the machining position corresponding to all the feeding mechanisms.

  As shown in FIG. 8, the current position screen displays information on the relative coordinate position, the absolute coordinate position, the machine coordinate position, and the remaining movement amount in the left half area. Information on overrides, doors, spindle rotation speeds, feed speeds, and magazines are displayed in the right half area as the current state of the machine tool.

  As shown in FIG. 9, the manual condition screen has, as the operating conditions related to the movement of the feed mechanism, the high speed movement speed, the high speed rotation speed, the low speed movement speed, the low speed rotation speed, the step movement amount, and the step rotation. The amount and spindle speed information is displayed. Information on the machine coordinate position, absolute coordinate position, and relative coordinate position is displayed in the lower half area.

  As shown in FIG. 10, the enlarged display screen enlarges and displays only the coordinate value of the current position, for example, the absolute coordinate position, indicating the machining position corresponding to all the feeding mechanisms over the entire display 82.

  The parameters stored in the display setting storage area 124 will be described. The display setting storage area 124 alternatively stores data indicating types of the current position screen, the enlarged display screen, the manual display screen, and no screen switching as parameter information. As shown in FIG. 12, the parameter is “1” for the current position screen, “2” for the enlarged display screen, “3” for the manual condition screen, and no screen switching. Is “0”. The display setting storage area 124 stores one of the parameters “0” to “3”.

  Next, processing when the operator operates the manual pulse generator 23 in the numerical control apparatus 100 having the above configuration will be described based on the flowchart of FIG. As a precondition, display data currently stored in the information storage area 123 is displayed on the display 82 of the control device of the machine tool. The current information storage area 123 stores the display data currently displayed on the display 82 and the type information of the feeding mechanism. It is assumed that parameter information of display data to be displayed on the display 82 is stored in the display setting storage area 124 in advance. The display setting process for storing parameter information of display data to be displayed on the display 82 in the display setting storage area 124 will be described later.

  In response to the input from the manual pulse generator 23, the processing of the CPU shown in the flowchart of FIG. 11 is started. When detecting the input from the manual pulse generator 23, the CPU 110 detects the feed mechanism selected by the feed mechanism selection switch 233 based on the selection signal (step S10). The CPU 110 determines whether or not the screen display to be displayed on the display 82 is switched with respect to the feeding mechanism selected by the operator. Whether the parameter information of the display data stored in the display setting storage area 124 is “0”. Judgment is made based on whether or not (step S20).

  If the parameter information of the display data stored in the display setting storage area 124 is “0” in step S20 (step S20: No), the CPU 110 shifts the process to step S40. When the parameter information of the display data stored in the display setting storage area 124 is not “0” (step S20: Yes), the CPU 110 displays the type of display data currently stored in the information storage area 123 and the display setting storage. It is determined whether the parameter information stored in area 124 is the same (step S30).

  When the type of the display data stored in the current information storage area 123 is different from the parameter information stored in the display setting storage area 124 (step S30: No), the CPU 110 stores the current display information storage area 125 in the current display information storage area 125. The display data stored in the information storage area 123 is stored as a display screen before display switching (step S32). The CPU 110 displays display data based on the parameter information stored in the display setting storage area 124 on the display 82 and stores it in the current information storage area 123 (step S35). If the type of display data currently stored in the information storage area 123 and the parameter information stored in the display setting storage area 124 are the same (step S30: Yes), the process proceeds to step S40 as it is.

  In the present embodiment, the process of step S35 of the CPU 110 corresponds to display data switching means.

  Next, the CPU 110 determines whether or not the feed mechanism type information currently stored in the information storage area 123 includes the feed mechanism selection information detected in step S10 (step S40).

  If the feed mechanism type information stored in the current information storage area 123 does not include the selection information of the feed mechanism detected in step S10 (step S40: No), the CPU 110 stores the present information in the display information storage area 125. The type information of the feeding mechanism stored in the information storage area 123 is stored (step S42). CPU110 detects the coordinate of the process position corresponding to the feed mechanism detected by step S10, and memorize | stores it in the coordinate information storage area 121 (step S43). The coordinates of the machining position are detected based on position feedback signals from the encoders 71b to 75b. The CPU 110 displays the coordinates of the machining position of the feed mechanism detected in step S10 on the display 82, and stores the display data on the display 82 together with the feed mechanism selection information in the current information storage area 123 (step S45).

  If the feed mechanism type information stored in the current information storage area 123 includes the feed mechanism selection information detected in step S10 (step S40: Yes), the process proceeds to step S50.

  The process of step S40 of the CPU 110 corresponds to the current position display detection unit, and the process of step S45 corresponds to the display screen switching unit.

  The CPU 110 detects the number of operation pulses of the handle 231 and the weight information selected by the magnification selection switch 232 (step S50). The CPU 110 drives and controls the feed motor of the feed mechanism detected in step S10 based on the number of pulse signals output based on the operation of the handle 231 and the weight information (step S60).

  Next, the CPU 110 determines whether or not the movement of the feed mechanism has been completed based on whether or not the operation of the handle 231 has been detected again (step S65). When the operation of the handle 231 is detected again (step S65: Yes), the process proceeds to step S60 again.

  When the operation of the handle 231 is not detected again (step S65: No), the CPU 110 determines whether display data or type information of each feeding mechanism is stored in the display information storage area 125 (step S70). . When display data or type information of each feed mechanism is stored in the display information storage area 125 (step S70: Yes), the CPU 110 stores the display data stored in the display information storage area 125 or the type information of each feed mechanism. Is displayed on the display 82 and stored in the current information storage area 123 (step S75), and the process ends. On the other hand, when the display data and the type information of each feeding mechanism are not stored in the display information storage area 125 (step S70: No), the CPU 110 ends the process as it is.

  The process of step S65 of the CPU 110 corresponds to the movement end detection unit, and the process of step S75 corresponds to the stored information display switching unit.

  Next, regarding the display setting process for storing the parameter information of the display data to be displayed on the display 82 in the display setting storage area 124, the screen display of the display 82 in the display setting process shown in FIG. 12 and the display setting process shown in FIG. It demonstrates based on the flowchart of these.

  The operator operates the feed mechanism selection switch 233 to select a feed mechanism (step S110). In this embodiment, a case where the X feed mechanism is selected will be described. Next, when the operator selects the “display setting screen” from the keyboard 81, the CPU 110 displays the display setting screen for the X-feed mechanism selected in step S110 on the display 82 (step S120).

  As shown in FIG. 12, on the display setting screen, the feed mechanism selected by the worker with the feed mechanism selection switch 233 and the parameters of the display type selected by the worker are displayed. Parameter candidates are displayed.

  On the display setting screen, the operator selects a display type parameter for the feeding mechanism selected by the operator via the keyboard 81 (step S130). In the present embodiment, “2” “enlarged display screen” is selected as the display setting parameter of the X feed mechanism. After the worker selects the parameter, the CPU 110 determines whether or not the worker has pressed the setting key (step S140). When the operator presses the setting key (step S140: Yes), the parameter information selected by the operator is stored in the display setting storage area 124 (step S150), and the process is terminated. On the other hand, if the setting key has not been pressed (step S140: No), the parameter information selected by the operator is not saved in the display setting storage area 124, and the process ends.

  Note that the process of step S150 of the CPU 110 corresponds to a display setting unit.

  As a result of the processing as described above, the numerical control device 100 detects the machining position corresponding to the feed mechanism selected by the operator using the feed mechanism selection switch 233. It is determined whether or not the detected machining position is displayed on the display 82. When it is determined that it is not displayed on the display 82, the CPU 110 switches the display information so that the detected machining position is displayed on the display 82.

  When the machining position corresponding to the feed mechanism selected by the operator is not displayed on the display 82, the CPU 110 displays the machining position corresponding to the feed mechanism on the display 82. There is no need to change the display. Therefore, the work efficiency can be improved and an erroneous operation when switching the display can be prevented.

  The CPU 110 stores the display data currently stored in the information storage area 123 or the type information of each feeding mechanism in the display information storage area 125 before the movement of the feeding mechanism. When the movement of the feed mechanism is completed, the display data stored in the display information storage area 125 or the type information of each feed mechanism can be displayed on the display 82, so that the operator can display the display before moving the feed mechanism. It is not necessary to switch to the screen display displayed on 82, work efficiency can be improved, and erroneous operation when switching the display can be prevented.

  When an operator selects a feed mechanism with the feed mechanism selection switch 233, display data to be displayed on the display 82 can be set for each feed mechanism, so that display data desired for the operator is displayed on the display 82. be able to. Therefore, it becomes unnecessary for the operator to switch the screen display, work efficiency can be improved, and erroneous operation when switching the display can be prevented.

  Next, a modified example in which the present embodiment is partially modified will be described.

  1] The display data stored in the display data storage area 122 may display a machining program or information such as machining conditions at the time of execution of the machining program together with the machining position of the feed mechanism. You may make it display the stroke which is a possible range.

  2] In the above-described example, the manual pulse generator 23 is used as the movement instructing unit. However, a switch for independently rotating the rotary table 25 fixed to the work rotation shaft of the work rotation mechanism 24 by a predetermined angle. In the case of the machine tool 1 provided with the above, it may be configured by the switch. In this case, the CPU 110 controls the drive of the B-axis drive motor 75 based on the pulse signal output while operating the switch to rotate the rotary table 25. When the numerical controller 100 detects the operation of the switch, it determines whether or not the workpiece rotation axis is included in the feed mechanism type information currently stored in the information storage area 123. When the work rotation axis is not included in the feed mechanism type information stored in the current information storage area 123, the CPU 110 stores the work rotation axis in the current information storage area 123 as the feed mechanism type information and displays it. A machining position corresponding to the workpiece rotation axis is displayed in 82. Therefore, an operation for switching the screen display of the display 82 by the operator becomes unnecessary.

DESCRIPTION OF SYMBOLS 1 Machine tool 2 Base 3 Machine main body 7 Spindle head 23 Manual pulse generator 24 Index table 25 Rotation table 80 Operation panel 81 Keyboard 82 Display 100 Numerical control apparatus 110 CPU
111 ROM
112 RAM
122 display data storage area 123 current information storage area 124 display setting storage area 125 display information storage area 231 handle 233 feed mechanism selection switch

Claims (5)

A plurality of feed mechanisms for moving the tool and the workpiece relative to each other;
A movement instructing means for instructing movement to a desired feeding mechanism from the plurality of feeding mechanisms;
In a numerical control device for a machine tool, comprising display means for displaying information relating to instructions by the movement instruction means,
A movement instruction detecting means for detecting whether or not movement of the feeding mechanism is instructed by the movement instruction means;
A current position detecting means for detecting a current position of the feed mechanism;
Current position display detection means for detecting whether or not the current position of the feed mechanism detected by the current position detection means is displayed on the display means;
When the movement instruction detecting means detects an instruction to move the feed mechanism from the movement instruction means, the current position display detecting means detects that the current position of the feed mechanism is not displayed on the display means. And a display screen switching means for displaying on the display means the current position of the feed mechanism detected by the current position detection means. Display information storage means for storing display information displayed by the display means before the movement instruction detection means detects an instruction to move the feed mechanism from the movement instruction means;
Movement end detection means for detecting the end of movement of the feed mechanism;
A storage information display switching means for displaying the display information stored in the display information storage means on the display means when the movement end detection means detects the end of movement of the feed mechanism. Item 2. A numerical control device for a machine tool according to Item 1. The plurality of feed mechanisms include an X feed mechanism for moving the tool or workpiece in a horizontal plane, an X feed mechanism for feeding in the Y direction, a Y feed mechanism, a Z feed mechanism for feeding in the vertical direction with respect to the horizontal plane, and the like. A feed mechanism,
The movement instructing means is a selecting means capable of selecting an arbitrary feeding mechanism from among the X feeding mechanism, Y feeding mechanism, Z feeding mechanism and other feeding mechanisms, and moves relative to the feeding mechanism selected by the selecting means. The numerical control device for a machine tool according to claim 1, wherein the numerical control device is a manual pulse generator provided with generating means for generating a quantity. The information related to the instruction by the manual pulse generator includes position information of the X feed mechanism, the Y feed mechanism, the Z feed mechanism, and other feed mechanisms, and a plurality of information for displaying the information on the display means in different formats. Display data storage means for storing display data;
Display setting means capable of setting display data in a desired format to be displayed on the display means from among the plurality of display data for each of the X feed mechanism, the Y feed mechanism, the Z feed mechanism and other feed mechanisms; ,
When the movement instruction detecting means detects the movement instruction of the X feed mechanism, Y feed mechanism, Z feed mechanism and other feed mechanisms from the manual pulse generator, the feed mechanism selected by the selection means is 4. The numerical control device for a machine tool according to claim 3, further comprising display data switching means for displaying the display data of the desired format set by the display setting means on the display means. 5. The plurality of display data includes enlarged display data for enlarging and displaying current positions of the X feed mechanism, the Y feed mechanism, the Z feed mechanism, and other feed mechanisms on the display means. The numerical control device of the machine tool described in 1.