JP2013041392A - Numerical controller and processing program generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerical controller that can flexibly deal with the change of a shaft name.SOLUTION: A numerical controller accepts, in addition to the input of a processed shape through a processing setting unit, the set content for a revolving shaft to process the processed shape, in which a table selection unit for specifying the revolving shaft to be set and an auxiliary unit for describing the set content without specifying the revolving shaft to be set are accepted separately.

Description

  The present invention relates to a numerical controller that outputs a command value for operating a machine tool and a machining program generation method that generates a machining program for generating the command value.

  The numerical control device generally generates a command value to be supplied to a servo amplifier built in a machine tool based on NC data (machining program) described in conformity with the ISO format. On the other hand, each axis name (A, B, C) exists in the rotary table of the machine tool to be numerically controlled. Therefore, in order for the numerical controller to operate the rotary table, the axis name must be specified on the NC data. For example, according to the technique disclosed in Patent Document 1, an axis can be indirectly addressed on NC data.

  In recent years, there is an interactive numerical control apparatus that automatically generates NC data based on an input program (hereinafter referred to as an interactive program) describing a machining shape, a tool, and the like. The interactive numerical control apparatus can automatically generate NC data for the axis to be operated when a user inputs a value to a setting item corresponding to the axis name.

JP 2004-185397 A

  Here, when it is desired to drive a machine tool in which a plurality of rotary tables for machining a workpiece can be attached and detached, the name of the axis to be machined may change before and after the attachment and detachment due to changes in the number of rotary tables and the orientation of the rotary table. is there. When the axis name changes, there is a problem that the interactive program used until now cannot be used because the axis name to be commanded is different.

  The present invention has been made in view of the above, and an object of the present invention is to obtain an interactive numerical control device and a machining program generation method that can flexibly cope with a change in axis name.

  In order to solve the above-described problems and achieve the object, the present invention is a numerical control device that interactively accepts an input of a machining shape and generates a machining program for machining the accepted machining shape, In addition to the input of the machining shape, the setting content for the rotation axis for machining the machining shape, the axis designation input for designating the rotation axis to be set for the setting content, and the setting content for the rotation axis for the setting target It is characterized in that it is received separately in the axis setting input described without designating.

  According to the present invention, it is possible to generate a machining program in which the axis name is changed only by changing the axis designation input by the user, so that it is possible to flexibly cope with the change of the axis name.

FIG. 1-1 is a diagram illustrating a configuration example of a machine tool. FIG. 1-2 is a diagram illustrating a configuration example of a machine tool. FIG. 1C is a diagram illustrating a configuration example of a machine tool. FIG. 1-4 is a diagram illustrating a configuration example of a machine tool. 1-5 is a diagram illustrating a configuration example of a machine tool. FIGS. 1-6 is a figure explaining the structural example of a machine tool. FIGS. 1-7 is a figure explaining the structural example of a machine tool. FIG. 2 is a diagram showing the configuration of the numerical controller according to the embodiment of the present invention. FIG. 3 is a diagram for explaining an outline of processing by the firmware program. FIG. 4 is a diagram for explaining the functional units constituting the interactive program. FIG. 5 is a flowchart for explaining the operation of the numerical controller according to the embodiment of the present invention. FIG. 6 is a diagram showing a specific example of the dialogue program.

  Embodiments of a numerical control device and a command generation method according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIGS. 1-1 to 1-7 are diagrams illustrating a configuration example of a machine tool to which a numerical control device according to an embodiment of the present invention is connected. According to the JIS standard, the rotation axis around the X axis is designated as the A axis, the rotation axis around the Y axis as the B axis, and the rotation axis around the Z axis as the C axis. However, when two or more rotation axes are attached in the same axis direction, a name other than a predetermined axis name can be assigned. The numerical control device according to the embodiment of the present invention is connected to a machine tool in which a rotary table (shaft) can be attached and detached as desired.

  FIG. 1-1 shows a configuration of a machine tool in which only one rotary table is attached to the X axis (+ direction), and the axis name of the rotary table is “A”. FIG. 1-2 shows a configuration of a machine tool in which only one rotary table is attached in the Z-axis direction, and the axis name of the rotary table is “C”. FIG. 1-3 shows a configuration of a machine tool in which a rotary table is attached to each of the X axis (+ direction) and the X axis (− direction). The axis name of the rotary table related to the X axis (+ direction) is “A”. The axis name of the rotary table for the X axis (− direction) is “C”. 1-4 shows a configuration of a machine tool having two rotary tables attached in the Z-axis direction, and the axis names are “A” and “C”, respectively. 1-5 shows a configuration in which a rotary table is attached to each of the X axis (+ direction) and the Z axis direction, and FIG. 1-6 shows a configuration in which a rotary table is attached to each of the X axis (− direction) and the Z axis direction. It is a configuration. In the configurations shown in FIGS. 1-5 and 1-6, the axis name of the rotary table in the X-axis direction is “A”, and the axis name of the rotary table in the Z-axis direction is “C”. FIG. 1-7 shows a configuration of a machine tool on which no rotary table is installed. In addition, the axis of rotation with the axis name “B” in FIGS. 1-1 to 1-7 is used as an axis for changing the direction of the tool.

  FIG. 2 is a diagram showing the configuration of the numerical controller according to the embodiment of the present invention. As shown in the figure, the numerical control device 1 includes a computing device 10, a volatile memory 20, a nonvolatile memory 30, an input device 40, a display device 50, and a machine tool connection interface (I / F) 60.

  The nonvolatile memory 30 stores a firmware program 31. The firmware program 31 is a computer program that executes provision of a software environment for interactively receiving input of the interactive program 21, conversion of the interactive program 21 into an NC code, and generation of a command value for a servo amplifier based on the NC code. . As the nonvolatile memory 30, for example, FlashRAM (Flash Random Access Memory), SDRAM (Synchronous Dynamic Random Access Memory), or the like is adopted.

  FIG. 3 is a diagram for explaining an outline of processing by the firmware program 31. As shown in the figure, the firmware program 31 analyzes the interactive program 21 input by the user, and generates an output table 23 as intermediate data for generating NC data 22. One output table 23 corresponds to one line of NC code constituting the NC data 22. In the output table 23, a pair of a command value and an output flag (0: not output, 1: output) is registered for each axis name. The firmware program 31 generates one line of NC code from a combination of entries in which the output flag registered in one output table 23 is “1”. In the example of FIG. 3, since the output flags of the A axis, the X axis, and the Y axis are “1”, an NC code that outputs a command value to each of the A axis, the X axis, and the Y axis is generated. The

  The command value finally output to the servo amplifier is generated by interpolating the command value commanded by the NC data 22 in terms of time and space. Hereinafter, the command value described in the NC data 22 is distinguished from the first command value, and the command value output to the servo amplifier is distinguished from the second command value. The NC data 22 is described by arranging NC codes generated from a plurality of output tables 23 in time series.

  FIG. 4 is a diagram for explaining the functional units constituting the dialogue program 21. As shown in the figure, the dialogue program 21 includes a table selection unit, a workpiece coordinate setting unit, a machining angle setting unit, and a machining setting unit. Under the control of the firmware program 31, the numerical control device 1 accepts input of the dialogue program 21 for each functional unit, sequentially stores the accepted functional units in the volatile memory 20, and interacts in the volatile memory 20. A program 21 is generated.

  The machining setting unit is a functional unit for specifying machining conditions (turning or milling) and machining shape, and the workpiece coordinate setting unit and machining angle setting unit function to assist the machining setting unit. It is a unit (auxiliary unit). From the combination of one machining setting unit and a plurality of auxiliary units, the number of output tables satisfying the machining shape machining is generated.

  In the work coordinate setting unit, a work coordinate system is set. The workpiece coordinate system is set, for example, by the origin position (X, Y, Z coordinate values). Further, when the coordinate rotation is performed, the coordinate rotation angle θ is set.

  In the processing angle setting unit, a processing angle is set. The machining angle is set by index coordinates indicating the machine position for changing the angle of the rotary table.

  Here, the auxiliary unit has “RT (Rotary Table)” as a common setting item. Item R. In T, the setting content for the rotation table is described. For example, item R. in the work coordinate setting unit. In T, the coordinate value of the rotation table is set. Also, item R. in the machining angle setting unit. At T, the angle of the rotary table is set. Item R. The rotation table to be set by T is specified by a table selection unit described below.

  The table selection unit is a functional unit that declares a rotary table to be operated. The axis declared by the unit is the item R.E contained in the subsequent auxiliary unit. The setting contents of T are to be applied. The contents of the declaration by the table selection unit are valid until another subsequent table selection unit declares another rotation table.

  As described above, in the embodiment of the present invention, the setting contents for the rotation table are divided into the table selection unit that specifies the rotation table to be set, and the auxiliary unit that describes the setting contents without specifying the rotation table. By enabling separate input, the NC data 22 corresponding to the change of the axis name can be generated simply by changing the table selection unit.

  Here, the rotation axis of coordinate rotation can be designated for the table selection unit. The setting content relating to the rotation center axis is described by combining a direction and a coordinate axis, for example. For example, when the X axis (+ direction) is set as the rotation center axis, it is described as + X. The coordinate rotation angle is set by describing the coordinate rotation angle θ in the subsequent work coordinate setting unit. The setting of the rotation center axis is effective until another rotation center axis is set by another subsequent table selection unit.

  The arithmetic unit 10 is, for example, a CPU (Central Processing Unit), and receives input of the interactive program 21, generates NC code, and supplies it to a servo amplifier provided in the machine tool under the control of the firmware program 31. Generate command values.

  The volatile memory 20 is constituted by a RAM, for example. The volatile memory 20 is used as a work area when the arithmetic device 10 executes the firmware program 31, and intermediate data generated when the firmware program 31 is executed is temporarily stored in the volatile memory 20. Here, the interactive program 21, NC data 22, output table 23, and axis designation information 24 indicating the axis designated by the table selection unit are temporarily stored as intermediate data.

  The machine tool connection I / F 60 is a connection interface for transmitting the second command value generated by the arithmetic device 10 to the machine tool and receiving input of sampling data sent from the processing machine.

  The input device 40 is an input unit that receives an operation for the numerical control device 1 and an input for editing the interactive program 21 stored in the nonvolatile memory 30, and is configured by, for example, a keyboard. The display device 50 is configured by a liquid crystal display or the like, and displays and outputs information generated by the arithmetic device 10. In addition, you may make it comprise the input device 40 and the display apparatus 50 with a touchscreen apparatus.

  FIG. 5 is a flowchart for explaining the operation of the numerical controller 1 according to the embodiment of the present invention. The operation described below is realized by the arithmetic device 10 executing the firmware program 31. Therefore, the arithmetic device 10 will be described as an operation subject.

  As shown in the figure, first, the arithmetic unit 10 prompts an input of the interactive program 21 under the control of the firmware program, and accepts an input of the interactive program 21 from the user (step S1). Here, it is assumed that an input is received for each functional block. The input functional block is temporarily stored in the volatile memory 20 as the interactive program 21.

  The arithmetic device 10 determines whether or not the input functional unit is a table selection unit (step S2). When the input functional unit is a table selection unit (step S2, Yes), the arithmetic unit 10 stores the axis name described in the table selection unit in the volatile memory 20 as the axis designation information 24 ( Step S3). And the process of step S1 is performed again.

  When the input functional unit is not the table selection unit (step S2, No), the arithmetic unit 10 creates the output table 23 according to the input functional unit (step S4). At that time, the item R.I. If T is included, the arithmetic unit 10 determines that the item R.T. The setting target of T is applied to the rotation table designated by the axis designation information 24. Thereafter, the arithmetic unit 10 generates an NC code based on the created output table 23 (step S5). The generated NC code is stored in the volatile memory 20 and constitutes NC data 22.

  Then, the arithmetic unit 10 determines whether or not to end the operation (step S6). If the operation does not end (step S6, No), the process proceeds to step S1 and further reads the functional block and ends. (Step S6, Yes) ends the operation. The determination of whether or not to end the operation may be performed based on whether or not there is an end instruction input from the user, for example.

  When there is no table selection unit in the dialogue program 21, the arithmetic unit 10 assumes that the rotary table does not exist in the machine tool to be driven by the dialogue program 21, and item R.D. All of the setting contents of T may be invalidated.

  FIG. 6 is a diagram showing a specific example of the dialogue program 21. The dialogue program 21 of this example is composed of a main program 21a and lower subprograms 21b and 21c referred to from the main program 21a. Specifically, the sub program 21b is referred to from the functional unit (UN No. 2) whose unit number is “2” described in the main program 21a. The subprogram 21c is referenced from the four functional units. The contents of the subprogram 21b and the subprogram 21c are the same. In the subprograms 21b and 21c, the functional unit (UNo. 1) described as WPC-1 is a work coordinate setting unit, and the functional units (UNo. 2 and UNo. 4) described as INDEX are It is a processing angle setting unit.

  In addition, UNo. 1 functional unit and UNo. 3 functional units are both table selection units (ROT-TABLE). The functional unit 1 has the axis name “C”, UNo. The function unit 3 declares the axis name “A”.

  Thus, UNo. 1 and UNo. Because the axis to be operated by NC data generated from the dialogue program 21 can be changed simply by changing the declaration contents in the table selection unit 3, even if the axis name is changed by attaching or detaching the rotary table, the user can easily Can create NC data 22 corresponding to the change.

  In addition, according to this example, the item R.S. described in the auxiliary unit included in the subprogram 21b is described. T sets the A axis as the setting target, and the item R.T. included in the subprogram 21c which is the same program as the subprogram 21b. T operates with the C axis as a setting target. That is, a single rotary program 21 can drive different rotary tables to the same subprograms 21b and 21c. Further, it is possible to control a plurality of rotary tables with one dialogue program 21.

  In the above description, it has been described that the dialogue program 21 is generated by being input for each functional block. However, the completed dialogue program 21 may be inputted through, for example, an external storage device.

  Further, the arithmetic unit 10 may store the completed interactive program 21 in the nonvolatile memory 30 so that it can be edited later.

  Further, the arithmetic unit 10 may store the generated NC data 22 in the nonvolatile memory 30 so that the NC data 22 can be reused later.

  In the above description, the NC code is sequentially generated from the input functional blocks. However, the NC data 22 may be generated collectively after the dialog program 21 has been generated.

  As described above, according to the embodiment of the present invention, the numerical controller 1 sets the setting content for the rotation axis for machining the machining shape in addition to the machining shape input by the machining setting unit. Since the table selection unit for designating the rotation axis and the auxiliary unit described without specifying the setting target rotation axis are received separately, the user edits the table selection unit. Since the axis name can be changed simply by doing so, it becomes possible to flexibly cope with the change of the axis name.

  In addition, the numerical control device 1 applies the setting contents described in the auxiliary unit to the rotation axis specified by the most recently input table selection unit among the table selection units input before the auxiliary unit. Since the application is configured, it is not necessary for the user to explicitly associate the table selection unit with the auxiliary unit, so that it is possible to flexibly cope with the change of the axis name. In addition, NC data for driving a plurality of rotation axes can be generated by a single interactive program.

  The table selection unit includes a description for specifying the rotation center axis, the work coordinate setting unit as an auxiliary unit includes a description for specifying the coordinate rotation angle without specifying the rotation center axis, and the numerical controller 1 Since the coordinate rotation is performed at the coordinate rotation angle described in the work coordinate setting unit around the rotation center axis designated by the table selection unit, the rotation center axis can be easily changed.

  As described above, the numerical control device and the machining program generation method according to the present invention are preferably applied to the numerical control device that controls the machine tool and the machining program generation method that generates the machining program that controls the machine tool.

DESCRIPTION OF SYMBOLS 1 Numerical control apparatus 10 Arithmetic apparatus 20 Volatile memory 21 Dialog program 21a Main program 21b Subprogram 22 NC data 23 Output table 24 Axis designation information 30 Non-volatile memory 31 Firmware program 40 Input apparatus 50 Display apparatus 60 Machine tool connection interface

Claims (6)

A numerical control device that interactively accepts an input of a machining shape and generates a machining program for machining the accepted machining shape,
In addition to the input of the machining shape, the setting content for the rotation axis for machining the machining shape, the axis designation input for designating the rotation axis to be set for the setting content, and the setting content for the rotation axis for the setting target Axis setting input described without specifying
A numerical controller characterized by that. Apply the setting contents described in the axis setting input to the rotation axis specified by the axis input that is input most recently among the axis specifying inputs input before the axis setting input.
The numerical controller according to claim 1. The axis designation input designates the rotation axis by the name of the rotation axis or the direction of the rotation axis.
The numerical control apparatus according to claim 1 or 2, wherein The axis designation input includes a description for designating a rotation center axis that is a center of coordinate rotation,
The axis setting input includes a description for designating a coordinate rotation angle without designating a rotation center axis,
The coordinates rotate at the coordinate rotation angle described in the axis setting input around the rotation center axis specified by the axis specifying input.
The numerical controller according to claim 1. The coordinate rotation of only the coordinate rotation angle described in the axis setting input is performed with the rotation center axis designated by the axis designation input newly input among the axis designation inputs inputted before the axis setting input. Run as the center,
The numerical control apparatus according to claim 4, wherein: Receiving a machining shape input;
The setting contents for the rotation axis for machining the machining shape are the axis designation input for designating the setting target rotation axis, and the axis setting input for describing the setting contents without designating the setting target rotation axis. Accepting the steps separately,
Applying the setting contents described in the axis setting input to the rotation axis specified by the most recently input axis specifying input among the axis specifying inputs input before the axis setting input. Generating a machining program for machining the machined machining shape;
A machining program generation method comprising:

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