JPH03263106A - Plotting condition setting means - Google Patents

Abstract

PURPOSE:To easily execute the setting change to an optimal plotting condition in a breakpoint, etc., of working and to easily execute the discrimination of a tool path locus by inserting in advance a plotting condition setting command of a change of the plotting direction, a change of a plotting scale, etc., on the way of an NC program, and changing automatically the plotting condition in the course of plotting. CONSTITUTION:At the time of generating an NC program PM, a desired plotting condition setting command is inserted in advance into a position in which it is desired to change a plotting condition of a breakpoint, etc., of working. Thereafter, synchronous plotting or check plotting is executed, and a tool path locus is plotted to a graphic display device 16. When the plotting condition setting command inserted into the NC program PM is read in, a plotting condition stored in a plotting condition storage means 3 is updated, therefore, a graphic trace function erases the plotting, and from the next block, the tool path locus is plotted under the plotting condition commanded by the NC program PM. In such a way, the setting change of the plotting condition can be executed easily in the breakpoint, etc., of working, and at the time of plotting, the tool path locus can be discriminated easily.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention calculates a tool movement path trajectory (hereinafter referred to as tool path trajectory) from an NC program, and draws this tool path trajectory on a display means of an NC device. The present invention relates to a drawing condition setting method for an NC device having a graphic tracing function.

[Conventional technology]

NC machine tools are NC machine tools that are created in advance by an NC control device.
Based on the program, the workpiece and tool are moved relative to each other to perform predetermined machining. That is, the NC device reads and analyzes the commands of the NC program. If the analyzed command is a movement command, it is output as a movement amount to a servo motor or the like for each axis, and the machine tool is operated to perform machining.

In addition, in synchronization with the operation of the NC machine tool, the NC device uses a graphic tracing function to calculate the movement of the tool as a tool path trajectory, and displays this tool path trajectory on the NC device. Some devices have the ability to draw (referred to as synchronous drawing) on a graphic display device. Alternatively, there are some that develop a function to draw the tool path locus on a graphic display device (referred to as check drawing) in order to check the created NC program without actually performing machining.

[Problem to be solved by the invention]

When drawing a tool path locus on a graphic display device using synchronized drawing or check drawing as described above, unless drawing conditions are manually set during drawing,
Continue drawing until the end of processing using the drawing conditions (direction, scale, position, etc.) set before drawing. For this reason, when machining a workpiece with a complicated shape, a large number of tool path loci are drawn overlapping each other, making it difficult to identify the tool path locus currently being drawn.

For this reason, conventionally, in order to easily identify the tool path locus, drawings were made at the pallet index at the breakpoint of machining, at the time of pallet exchange, at the change of roughing/finishing, at the change of workpieces, etc. The conditions were set again. However, in order to reset the settings, it is necessary to temporarily stop processing or drawing and manually reset the drawing conditions, which makes the operation complicated and reduces work efficiency.

The present invention was devised to solve the above-mentioned problems, and its purpose is to easily change drawing condition settings at machining boundaries, etc., and to easily identify tool path loci during drawing. An object of the present invention is to provide a drawing condition setting method.

[Means to solve the problem]

In order to solve the above problems, a drawing condition setting method according to the present invention reads an NC program in an NC device of a machine tool, calculates a relative movement path when a tool performs processing on a workpiece, A method for setting drawing conditions when drawing using a graph ink trace function that draws a locus of the movement route on a display means according to drawing conditions stored in a drawing condition storage means. A step in which an NC program in which a drawing condition setting command for updating drawing conditions is inserted at an arbitrary block position is sequentially read block by block and translated into an executable format, and the translated NC program in this step is If one block is the drawing condition setting command, the drawing condition storing means updates the drawing condition stored in the drawing condition storage means in accordance with the drawing condition setting command.

[Effect]

When creating an NC program, the desired drawing condition setting command is inserted at the position where you want to change the drawing conditions such as machining divisions, and after writing, synchronized drawing or check drawing is performed to determine the tool path trajectory. Draw on a graphics display device. When the drawing condition setting command inserted into the NC program is read using the above means, the drawing conditions stored in the drawing condition storage means are updated, so the graphic trace function erases the drawing and starts the tool path trajectory from the next block. is drawn under the drawing conditions instructed by the NC program.

〔Example〕

Hereinafter, one implementation of the drawing condition setting method of the present invention will be described based on the drawings.

FIG. 1 is a block diagram illustrating the invention in detail.

PM is an NC program into which drawing condition setting commands for changing the drawing direction, drawing scale, etc. are inserted in advance, and 2 is an NC program translation means, which sequentially reads the NC program PM block by block and converts it into an executable model. Translate to

Reference numeral 3 denotes a drawing condition storage means, which analyzes the drawing condition setting command if there is a drawing condition setting command when sequentially executing the translated blocks, updates the drawing condition, and stores it.

4 is a block execution means, which analyzes the blocks translated by the NC program translation means 2 and executes numerical control.

5 is a 1f image position calculation means, which uses the coordinate values of the tool center position calculated by the block execution means 4 to draw on the CR77 screen of the graphic display device based on the drawing conditions stored in the drawing condition storage means 3. The coordinate values (drawing points) of the tool path trajectory on the screen are sequentially calculated.

A display memory 6 stores the drawing points calculated by the drawing position calculating means 5.

FIG. 2 is a block diagram of an NC device implementing the present invention. Components that are the same as those in FIG. 1 are designated by the same reference numerals.

11 is a processor (CPU), 12 is a ROM that stores control programs, etc., 13 is a RAM that stores various data such as tool offsets, 14 is an NC program memory that stores NC programs, etc., 15 is a keyboard, and 16 is an N
This is a graphic display device that is a display means for drawing C programs, tool path loci, etc.

The graphic display device 16 includes a display memory 6 and a CRT 7.

Next, the drawing condition setting command to be inserted into the NC program PM will be explained.

An example of the command type is shown below.

G10L99P HV X Y Z I
JKABC.

However, each address indicated by the alphabet here is defined as follows.

rG10L99'' is a condition setting command, and indicates that this block is a drawing condition setting command.

"P" is the address of the drawing surface, and is a command to select the type of figure to be drawn.

For example, "PO" is a command to select an xyz perspective view, "Pl" is a command to select an XY plan view, "P2" is a command to select a YZ plan view, and rP3J is a command to select a ZX plan view.

"H" is the horizontal viewing angle address.

"■" is the address of the vertical viewing angle.

When the XYZ perspective view "PO" is selected as the drawing surface, the viewpoint angle is set.

For example, set the maximum value in the X-axis direction after address "X", set the maximum value in the Y-axis direction after address "Y",
Set the maximum value in the Y-axis direction after address "Z", set the minimum value in the X-axis direction after address "I", set the minimum value in the Y-axis direction after address rJJ, and set the minimum value in the Y-axis direction after address "K".
'', set the minimum value in the Y-axis direction, and set the maximum and minimum values of the drawing range in each axis direction. As a result, CR
The drawing magnification on T7 is automatically determined.

"A" is the address for tool radius correction drawing, and is a command for selecting whether to draw the tool path locus with an offset by the tool radius or without offset.

For example, "AO" is a command to select drawing with tool radius correction disabled, and "A1" is a command to select drawing with tool radius correction enabled.

"B" is the address of the cutting feed drawing line, and rCJ is the address of the fast feed drawing line. This selects the type of drawing line for the tool path locus for cutting feed or rapid feed. In addition, rBOJ, rcO.

is set when not drawing, rBIJ, rcIJ is set when drawing as a solid line, rB2J, rC2J
is set when drawing with dotted lines.

Next, a program for drawing condition setting commands will be explained using the following example.

The drawing conditions are as follows: Drawing surface: XYZ perspective view Horizontal viewing angle: 45° counterclockwise from the X axis Vertical viewing angle: 30° from the XY plane to the Z+ side Drawing range in each axis direction = X axis -100~ 100 Y-axis - 95 to 95 2-axis - 50 to 50 Tool radius correction drawing: Invalid cutting feed drawing line: Solid fast-forward drawing line When changing to a two-dot line, use G10L99POH45V30X100. OY95.0
Z50.0I-100, 0J-95, OK-50, OA
Command like OBI C2i.

This drawing condition setting command is inserted into the NC program.

As a result, when a block of the drawing condition setting command is read, the drawing screen is erased, and drawing is performed from the next block using the drawing condition specified by the drawing condition setting command.

The drawing condition setting command of the above program example is applied to the NC for contour cutting.
FIG. 4 shows an example in which it is inserted before the program and drawn.

In FIG. 4, CLI is the tool path trajectory during rapid feed, Cl3 is the tool path locus during cutting feed, and x, y, and z are the respective coordinate axes.

FIG. 3 is a flowchart of the process of the present invention. The drawing condition setting process will be explained below according to the flowchart in FIG. In addition,
The desired NG program PM for which numerical control is to be executed has already been created and is stored in the NC program memory 14.
It is assumed that it is stored internally. The NC program P
A drawing condition setting command is inserted into an arbitrary block position of M.

The processor 11 uses the NC program translation means 2 to
One block of the NC program PM selected for the work to be machined this time is read from the C program memory 14 and translated one by one (step 101).

Next, the processor 11 calculates N in one translated block.
C program termination command (for example, rM.

2" or "M2O") in step 102), and if there is an end command, the process ends.

On the other hand, if there is no termination command within one translated block,
Next, it is determined whether there is a drawing condition setting command or not, step 103L. If there is a drawing condition setting command, the drawing condition setting command is analyzed by the drawing condition storage means 3, and the drawing condition is updated and stored (step 104). Then, the process from step 101 is repeated for the next block.

It is assumed that when a new drawing condition is stored in the drawing condition storage means 3, the previous drawing condition is deleted and updated.

In the judgment at step 103, if it is not a drawing condition setting command, the processor 11 analyzes one translated block using the block execution means 4 and executes the NC program (step 105).

Then, using the coordinate values of the tool center position (tool path locus data) calculated by the block execution means 4 and based on the drawing conditions stored in the drawing condition storage means 3, CRT7!
Sequentially calculate the coordinate values of the drawing points to be drawn on the surface (step 106), store the calculated coordinate values of the drawing points in the display memory 6 (step 107), display them on the CR77 screen from the plurality of drawing points in the memory 6 Output and draw an image.

Note that when the drawing conditions have been updated in the immediately preceding block, drawing is performed after erasing the drawing (step 108).

When the drawing in step 108 is completed, the process from step 101 is repeated for the next block.

〔Effect of the invention〕

As described above, according to the present invention, by inserting drawing condition setting commands such as changing the drawing direction and drawing scale in the middle of the NC program, it is possible to dynamically change the drawing conditions during drawing. , settings can be easily changed to optimal drawing conditions at machining boundaries, etc., and tool path trajectories can be easily identified. In addition, there is no manual intervention during drawing, which improves work efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram of an NCIJ control device that implements the present invention, FIG. 3 is a flowchart of the drawing condition setting process of the present invention, and FIG. 4 is a block diagram of the present invention. It is a drawing side view which shows the example of drawing. PM・-NC program, 2... NC program translation means, 3... Drawing condition storage means, 4... Block execution means, 5... Drawing position calculation means, 6... Display memory, 7. -CRT. Figure 2 Figure 3

Claims (1)

[Claims] In an NC device of a machine tool, an NC program is read, a relative movement path of a tool when machining a workpiece is calculated, and the drawing condition is stored in a drawing condition storage means. A method for setting drawing conditions during drawing using a graphic tracing function for drawing a locus of a moving route on a display means, the drawing condition setting command for updating the drawing conditions stored in the drawing condition storage means being an arbitrary block. a step of sequentially reading the NC program inserted at the position block by block and translating it into an executable format; and if one block of the NC program translated in this step is the drawing condition setting command, the drawing condition is A drawing condition setting method comprising the step of updating drawing conditions stored in a storage means in accordance with a drawing condition setting command.