JPH09160620A - Numerical controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerical controller capable of executing a machining program within a set machining range in real time while performing program analytic processing without modifying or correcting the program, and facilitating partial machining and remachining by limiting an arbitrary area in the machining program. SOLUTION: This controller 1 is provided with a setting table 4 for machining ranges by axes and when the machining program is executed according to respective command data in an NC machining program storage part 1, an NC machining program analysis execution part 3 compares respective axis movement ranges with machining ranges stored in the machining range setting table 4 by the command data at all times to execute the program. When the axis movement range of the command data is all included in the machining range, axis movement is performed as it is, but when part of it is included, namely, when the execution is carried out from inside to outside the machining range or vice versa, the command data in the machining range are converted to perform axis movement and when the movement range is not included, the shaft movement is not performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device, and more particularly to program execution of an NC machine tool.

[0002]

2. Description of the Related Art In a numerical control apparatus, there is a case where it is necessary to partially re-process after the processing is once completed, or a case where a processing range is limited to carry out partial processing. FIG. 9 shows an explanatory diagram for performing such reworking or partial working. For example, in die processing or the like, the shaded portion 9 of the object 91 to be processed
Suppose that 2 is to be reprocessed or partially processed. At that time, for example, a measure is taken such that the build-up is partially corrected at the shaded portion 92 and only that portion is processed.

In the NC machining program generally used at present, when the machining range is limited in this way, it is necessary to execute the entire program. In this method, since the machining program is executed from the beginning to machine the whole, it takes a very long time including a range other than the necessary machining range.

Therefore, according to another conventional method, as a method of limiting the machining range, there is a method of executing the machining program from an intermediate step using a sequence number search function, a program restart function, or the like. Further, there is a method called an optional block skip in which a judgment symbol (for example, a flag “1”) for designating skip skip is added in a block of a program and the corresponding block is ignored when the program is executed. Was adopted.

[0005]

However, in the prior art as described above, it is indispensable to edit or modify the machining program itself in order to execute it from an intermediate step of the program or add a judgment symbol. . Therefore, there is a problem that it takes time to create the data.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a numerical controller capable of easily realizing partial machining / remachining in which an arbitrary region in a machining program is limited. And

[0007]

According to the numerical controller of the present invention, a machining program storage means for storing command data, a machining range setting table storage means for setting a machining range, and the command data for the machining range. By comparison, if it is within the processing range, the command by the command data is executed,
A control means for not executing the command when the processing range is out of the processing range and a driving means controlled by the control means are provided.

Further, the control means, when executing the program according to the command data in the machining program storage means, compares the axis movement range according to the command data with the machining range, and the axis movement range is the machining range. If all are included in the machining range, the axis movement is executed as it is, if only part of it is included, it is converted to command data within the machining range and the axis movement is executed. The feature is that the axis movement is not executed.

Further, according to the numerical controller of the present invention,
The present invention is characterized by further comprising input means for inputting a processing range, input means for inputting a starting point, or setting means for automatically setting a starting point for partial processing or reprocessing.

In the numerical controller of the present invention, a machining range setting table for each axis is provided, and when the machining program is executed by each command data, each axis movement range and the machining range stored in the machining range setting table are set. The command data is constantly compared and executed. Then, if the axis movement range according to the command data is all included in the machining range, the axis movement is executed as it is, and if only part of it is included, that is, if it extends outside the machining range, it is converted into command data within the machining range. Axis movement is performed on the other hand, and when it is outside the machining range, the axis movement is not executed, so that the program analysis processing is executed without changing and modifying the program and The machining program can be executed in real time, and partial machining / re-machining in which an arbitrary region in the machining program is limited can be easily realized.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Some embodiments of the present invention will be described in detail below.

FIG. 1 is a block diagram of a numerical controller according to an embodiment of the present invention.

The numerical controller 1 comprises an NC machining program storage unit 2, an NC machining program analysis execution unit 3, a machining range setting table storage unit 4, an output control unit 5, and an output interface unit 6. Output interface unit 6
The drive unit 7 is connected to the. Further, an input unit 8 for inputting various programs and data and a display unit 9 for displaying
Is provided.

The NC machining program storage unit 2 stores command data which is information for instructing the operation of the machine for each block. These command data are usually JI
Either the ISO code or the EIA code specified in SB 6311 is used. For example, as the command data of the NC machine tool, G function (control function, preparation function), M function
Function (auxiliary function), F function (feed function), dimension word X,
There are Y, Z (motion dimensions of X axis, Y axis, Z axis) and the like.

The NC machining program analysis execution unit 3 is composed of a microcomputer or the like, sequentially reads and analyzes the command data stored in the NC machining program storage unit 1 block by block, and further, the machining range setting table storage unit 4
A predetermined operation is performed with reference to the data stored in.

The processing range setting table storage unit 4 stores data necessary for limiting the processing range. The setting of these processing range data can be appropriately input by the input device 8.

In the output control unit 5, the rotation number, the rotation angle, the rotation speed, the moving width, the moving speed and the like of the predetermined driving unit 7 are instructed by the instruction of the NC machining program analysis executing unit 3.

The output interface section 6 distributes the command from the feed speed position control section 5 to predetermined driving sections 7.

The drive unit 7 is composed of a rotating unit or a moving unit of an NC machine tool using a feed motor or the like. The drive unit 7 is
Usually, it has a servo mechanism and is composed of a plurality of drive devices. A predetermined drive unit 7 is driven by the command signal sent through the output interface unit 6, and NC
The positioning, movement width, movement speed or rotation speed of the machine tool are controlled.

The input unit 8 is a well-known input device such as a keyboard and a mouse, and inputs programs or data from the NC machining program storage unit 2 and the machining range setting table storage unit 4. In addition, it is possible to perform input for maintenance, troubleshooting, etc.

The display unit 9 is composed of a display device such as a CRT and a liquid crystal display, and can display various data, programs and the like. Further, by providing a two-dimensional or three-dimensional graphic function, it is possible to display a machining range, a machining situation, etc., as necessary, on the whole machining diagram or the partial machining diagram.

Next, an outline of the operation of such a numerical controller will be described. The NC machining program analysis execution unit 3 outputs a command signal based on the data in the NC machining program storage unit 2 and with reference to the machining range setting table storage unit 4. That is, when the machining program is executed by each command data, each axis movement range and the machining range stored in the machining range setting table are constantly compared and executed for each command data. Then, if the axis movement range according to the command data is all included in the machining range, the axis movement is executed as it is, and if only part of it is included, that is, if it extends outside the machining range, it is converted into command data within the machining range. The axis movement is executed by means of this, and when it is outside the machining range, the axis movement is not executed. The conversion processing when determining whether it is within the processing range or outside the processing range and executing it will be described in detail later. In response to this command signal, the feed speed position control unit 5 commands the rotation speed, rotation angle, rotation speed, etc. of the feed motor 7 via the output interface unit 6, thereby positioning and moving speed of the NC machine tool. Etc.

In this way, partial machining / re-machining only within the arbitrary machining range set in the machining range setting table storage section 4 of the data in the NC machining program storage section 2 is performed.
It can be done easily.

FIG. 2 shows an example of the NC machining program stored in the NC machining program storage unit 2. Here, the block number 00 indicates that the initial state moves to the X coordinate 2500 and the Y coordinate −2000 as a preparation function. In block number 01, a predetermined moving speed is set by linear interpolation. Block number 03 is X coordinate 2500
And the Y coordinate 2500. The block number 04 indicates that the movement is performed with the X coordinate 2000 and the Y coordinate unchanged. After that, up to block number 22, X coordinate,
Move to the predetermined value of the Y coordinate. Finally, block number 23 indicates the end of the program.

Further, FIG. 3 shows an example of setting a rectangular machining range in the machining range setting table set in the machining range setting table storage unit 4. here,
By storing the coordinate value data of the four corners of the rectangle,
The data table format in which the processing range is set is shown.

FIG. 4 shows a detailed flowchart of the machining operation according to the present invention. First, command data of block numbers 00 and 01 in the NC machining program are sequentially input to perform initial setting (S10). Next, the processing range data of the processing range setting table is input (S20). Next, NC
A machining program is input block by block (S30).
Here, when the program end command is input like the command data of the block number 23 (S40), the execution ends. Next, it is analyzed whether or not the axis movement range according to the command data is all included in the machining range set in the machining range setting table (S50). For example, in this analysis, the moving range is obtained from both the previous coordinate value and the coordinate value input this time, and the moving range is compared with the working range data in the working range setting table to determine whether it is within the working range. It can be analyzed by judging whether or not. As a result of the analysis, if the axis movement range based on the command data input this time is included in the machining range, the processing is executed as it is (S60). On the other hand, when the axis movement range is not all included in the machining range, only a part of the axis movement range is included in the machining range, that is, whether the axis movement range extends within the machining range and outside the machining range, or is machining not performed at all. If it is not included in the range, that is, if it is outside the processing range, it is analyzed (S70). If only a part of the axial movement range is included in the machining range, the command data is temporarily converted so that the axial movement range is within the machining range. As a method of this kind of conversion, for example, the NC machining program analysis executing unit 3 or the like appropriately calculates so as to move only to or near the end of the machining range set in the machining range setting table. Can be converted. On the other hand, if the movement range is not included in the machining range at all,
The next NC machining program is input while invalidating the command data and leaving it unexecuted (S30).

According to such a flow chart, FIG.
The program is specifically executed as follows. (1) Process execution in the entire processing range If no data is set in the processing range setting table, the processes in the entire processing range are performed. That is, in step S50, each command data is within the processing range, and YES is determined. Therefore, the next step S60
Will execute all command data. In this way, the axis movement is executed in a locus such as the positions B00 to B23 shown in FIG. 5 by the command data of each block of the NC machining program of FIG. Here, the position Bnm corresponds to the command data by the block number nm in FIG. Further, the soft stroke limit is a limit range when processing is performed according to command data. (2) Process execution by designating machining range When data is set in the machining range setting table, a partial machining process is performed. FIG. 6 is an explanatory diagram of automatic conversion of the command data of the NC machining program when the machining range is set, and FIG. 7 is an explanatory diagram showing the locus of axis movement.

Block numbers 00, 02 to 0 in FIG.
When the command data of No. 9 is input, it is determined to be outside the processing range of the processing range setting table in steps S50 and S70, and the processing is not executed. Since the command data of block number 01 does not include a command for axis movement, the movement speed or the like is set appropriately. Next, returning to step S30, the command data of the next block number 10 are sequentially input. When the command data of block number 10 is input, step S
According to 50 and S70, it is determined that the axial movement range from the position B09 to the position B10 is partially included in the machining range, that is, it extends outside the machining range. Therefore, in step S80, the command data of the block number 10 is command data (X500, Y2) for instructing to move to the outer peripheral end within the processing range without moving to the position B10.
000) is automatically converted into axial movement to position B'10 within the processing range. Next, block number 11
Command data is input, it is command data for moving in the X direction to the X coordinate 0 based on the position B'10 by this converted command data, and this axis movement range is all included in the machining range. Therefore, the processing is directly executed in step S60. Hereinafter, similarly, the command data of the block number 12 is converted to (X0, Y500), moved to the position B'12, and similarly, automatically converted to the positions B'13, B'14, ~ B'15 or the like. It is executed as it is, and the axis is moved within the machining range. The command data of block numbers 17 to 22 are not executed because the axis movement range is not included in the machining range at all, that is, outside the machining range. Finally block number 23
The NC machining program is ended by the program end command of.

When executing the program by designating the machining range of the NC machining program, positioning is performed before the machining program is executed by operating the machining range designation menu or an input unit such as a key switch before executing the NC machining program. You can also enter the coordinate values of each axis that you want. Further, one of the machining range data in the machining range setting table may be used as the coordinate value of each axis. In this case, for example, the program within the machining range can be executed after the start position is set at an arbitrary position first. FIG. 8 shows an example thereof, and here, the position P1 is used as a starting point for partial processing or reprocessing.

As a method of automatically setting the starting point, it is first determined whether the axis movement based on the command data is an axis movement from outside the machining range to within the machining range. Next,
When it is determined that the movement is such an axis movement, the intersection or the vicinity thereof between the axis movement line and the boundary of the processing range is obtained, and the intersection or the vicinity can be set as the start point. For example, as shown in FIG. 8, in order to automatically set the position P1 or the vicinity thereof as the start point, first, the axial movement from the position B09 to the position B10 is the axial movement from outside the machining range to within the range. Judge that there is. Next, it can be carried out by obtaining an intersection point where this axial movement enters the machining range area and setting the intersection point or the vicinity thereof as a start point.

In the above embodiment, the explanation has been made only with the X and Y coordinate values, but it is also possible to apply it to three dimensions having X, Y and Z coordinates. Not only axis movement command but also N
Besides the C machining program, it can be applied to partial execution of every program execution.

[0032]

As described above, according to the numerical controller of the present invention, the machining range setting table for each axis is provided, and when the machining program is executed by each command data, each axis moving range and machining range setting table are set. The machining range stored in is constantly compared and executed for each command data.When the axis movement range according to the command data is all included in the machining range, the axis movement is executed as it is. In other words, if it extends outside the machining range, it is converted into command data within the machining range and the axis movement is executed, while if it falls outside the machining range, the axis movement is disabled and the program is modified. Without executing the program analysis process, it is possible to execute the machining program within the set machining range in real time. Processing can be easily realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a numerical control device according to the present invention.

FIG. 2 is an NC stored in an NC machining program storage unit 2.
Explanatory drawing of a processing program.

FIG. 3 is a processing range setting table set in a processing range setting table storage unit 4.

FIG. 4 is a flowchart of a processing range operation.

FIG. 5 is an explanatory diagram of axis movement for executing processes in the entire processing range.

FIG. 6 is an explanatory view of a machining program conversion by designating a machining range.

FIG. 7 is an explanatory diagram of axis movement for executing a process by designating a machining range.

FIG. 8 is an explanatory diagram of axis movement for process execution by designating a machining range when a start point is set.

FIG. 9 is a schematic view of reprocessing / partial processing.

[Explanation of symbols]

 1 Numerical Control Device 2 NC Machining Program Storage Section 3 NC Machining Program Analysis Execution Section 4 Machining Range Setting Table Storage Section 5 Output Control Section 6 Output Interface Section 7 Drive Section 8 Input Section

Claims (7)

[Claims] 1. A machining program storage means for storing command data, a machining range setting table storage means for setting a machining range, comparing the command data with the machining range, and if the command data is within the machining range, A numerical control device comprising: a control unit that executes a command based on command data and that does not execute the command when it is outside the processing range; and a drive unit that is controlled by the control unit. 2. The control means, when executing a program according to the command data of the machining program storage means, compares the axis movement range according to the command data with the machining range, and the axis movement range is the machining range. If all are included, the axis movement is executed as it is, and if only part is included, it is converted to command data within the processing range and axis movement is executed.
On the other hand, when it is not included in the machining range at all, the axial movement is not executed, and the numerical controller according to claim 1. 3. The numerical control according to claim 1, wherein the control means obtains the axial movement range from a coordinate value of the previous command data and a coordinate value of the current command data. apparatus. 4. The numerical controller according to claim 1, further comprising input means for inputting the machining range for partial machining or remachining. 5. An input means for inputting a starting point for partial processing or reprocessing is further provided.
Or the numerical controller according to 2. 6. It is determined whether or not the axis movement according to the command data is an axis movement from outside the machining range to within the machining range, and if such axis movement is determined, the axis movement line is determined. 3. The numerical controller according to claim 1, further comprising: a setting unit that obtains an intersection point of the boundary of the machining range or its vicinity and sets the intersection point or the vicinity thereof as a start point. 7. The numerical controller according to claim 1, further comprising display means for displaying the machining range or machining status for partial machining or remachining.