JPH0391811A - Working form plotting system - Google Patents

Abstract

PURPOSE:To easily identify the loci even of they touch and overlap with each other on a CRT owing to a small locus space by displaying the colors of the tool loci on the CRT after changing successively these colors every time the tool moving direction is inverted at a coordinate axis. CONSTITUTION:A plotting process program and a working program are loaded from a floppy disk via a disk controller 6 and stored in a RAM 3 and an NC data storage memory 4. A CPU 1 sets and store previously a reverse axis and reads the NC data for each block to decide the moving direction of a tool at a set coordinate axis. Then the display colors of the tool loci are successively changed for each inversion of the tool moving direction and shown on a CRT 7. As a result, the loci can be easily identified even if they touch and overlap with each other owing to a small locus space.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a machining shape drawing method for drawing a tool trajectory defined by NC data on a graphic display.

Confirmation of the shape to be machined based on conventional technology NC data. The drawing method is already set. It is publicly known.

In this type of machining shape drawing method, the magnification of the drawing screen is generally set within the range where the outline of the workpiece to be processed fits within the drawing area on the graphic display (usually 0.0
(in the range of 1 to 100 times), the machined shape is confirmed by drawing the tool trajectory defined by the NC data on this graphic display.

Problems to be Solved by the Invention Therefore, when a large workpiece is to be machined, it is common to set the magnification of the drawing screen to a small value, and when the tool trajectory defined by NC data is complex, for example, When surface cutting is performed by moving the tool back and forth with a large increment width, the intervals between the tool trajectories drawn on the graphic display are extremely small, and adjacent tool trajectories may touch or overlap. A phenomenon occurred in which the actual movement trajectory of the tool could not be identified.
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In order to compensate for these drawbacks, with conventional technology, a part of the tool path is enlarged and drawn on a graphic display to check the detailed tool path and machining shape, but only a part of the tool path is displayed. If the image is enlarged and displayed, the entire tool trajectory and machining shape cannot be confirmed, which causes problems such as the inability to appropriately judge the relationship between the tool trajectory and machining shape of each part and the whole.

The purpose of the present invention is to eliminate these drawbacks of the prior art and to eliminate the need for multiple tool trajectories. It is an object of the present invention to provide a machining shape drawing method that can easily identify the movement locus of a tool and easily grasp the entire machining shape even if the step width is small.

Means for Solving the Problems The machining shape drawing method of the present invention sets and memorizes coordinate axes in advance, reads NC data block by block to determine the moving direction of the tool in the set coordinate axes, and then reverses the moving direction. The above objective was achieved by sequentially changing the display color of the tool trajectory defined by the NC data each time the tool was drawn.

Each time the moving direction of the tool in the memorized coordinate axes is reversed, the display color of the tool trajectory defined by the NC data of the block is sequentially changed and drawn on the graphic display. Even if the intervals between the blocks are narrow and the tool trajectories defined by the NC data of each block touch or overlap, the tool trajectories defined by the respective NC data can be easily identified.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the main parts of an NC automatic programming device according to an embodiment of the present invention, in which 1 is a processor (hereinafter referred to as CPU), and 2 is a control for controlling the NC automatic programming device. ROM stores programs, 3 is a RAM that stores various system programs loaded from the floppy disk FL, results of arithmetic processing by the CPU, etc. 4 is a floppy disk and NC data created by the NC automatic programming device 5 is a keyboard, 6 is a disk controller, and 7 is a graphic display (hereinafter referred to as CRT); each of these elements 1 to 7 is connected by a bus 8. ing.

In addition, as a floppy disk FL, a data storage disk for storing created NC data and a system disk for storing various system programs are prepared in advance. In addition to various system programs, in particular, a program for executing the drawing mode according to the method of the present invention (hereinafter referred to as
(referred to as a drawing processing program) is stored there.

Below is a flowchart (Figure 2) showing an outline of the drawing processing program and a list (Table 1) showing an example of a processing program for drawing the processing shape.
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It is assumed that these drawing processing programs and processing programs to be drawn have already been loaded onto the floppy disk FL via the disk controller 6 and stored in the RAM 3 and the NC data storage memory 4, respectively.

Table 1. Program list 0001 (1st block) G
92XO. YO. (2nd block) G9
0GOOX10. YIO. (3rd block) GOI
XIOO. ; (4th block) Y15.
; (5th block) XIO. ;
C 6th block) Y20. ;
(7th block) XIOO. ; (8th block) Y25. ; (9th block)
XIO. ; (10th block) Y30.
(11th block) CPU that started processing according to the drawing processing program stored in RAM3
I first enters a standby state in which it waits for the selection of a coordinate axis (hereinafter referred to as the reversal axis) that serves as a criterion for the tool movement direction (step S1).

The machining program shown in Table 1 is for cutting a rectangular surface in the X-Y plane, and the main machining feed direction of the tool is parallel to the X-axis and reciprocating in the range of X-10 to X=100. However, since the feed amount in the Y-axis direction inserted during the turning of this reciprocating movement is as small as 5 (or more, the unit is mm), the interval between the tool trajectories parallel to the X-axis is extremely small. Therefore, it is assumed that adjacent tool trajectories in the X-axis direction are drawn in contact with or overlapping each other.

Therefore, in order to cope with such a situation, the operator selects the X axis as the reversal axis and inputs settings via the keyboard 5. (In this example, the inversion axis is the X axis,
It is possible to select any one of the Y-axis and Z-axis and enter settings. ) Meanwhile, the CPU 1 memorizes the reversal axis set and inputted by the operator (step S2).
, index i, j and register R (P) (step S3), the value of index i is incremented (
Step S4) reads and temporarily stores the NC data of the i-th block indicated by the value of the index i (=1), that is, the program number roo01J, and
The data is displayed on the NC data display area (not shown) of the CRT 7 (step S5).

Next, the CPU 1 determines whether or not the block read this time is a movement command block (step S6).
Since this block is not a movement command block, the process moves to step S7 to determine whether it is a block indicating a program end. Since this block is not a block indicating the program end, after proceeding to step S4 and incrementing the value of the index i, the NC data of the i-th block indicated by the value of the index i (=2), That is, rG92XO. YO. J is read and temporarily stored, and this NC data is displayed in the NC data display area of the CRT 7 (step S5).

Second block NC data rG92XO. YO. "teeth,
This is NC data for defining the workpiece coordinate system. In this example, it means to match the origin of the workpiece coordinate system with the origin of the machine coordinate system. Therefore, it is not a movement command block or a block indicating the end of the program, but is After the determination processing in steps S6 and S7 is completed, the process proceeds to step S4 and increments the value of the index i, and similarly to the above, the NC data of the i-th block indicated by the value of the index i (=3), That is, rG90GOOX10. Y1
0. J is read and temporarily stored, and this NC data is displayed in the NC data display area of the CRT 7 (step 85).

Third block NC data rG90GOOX10. YI
O. J is a positioning command with absolute specification, and in this example, the tool is moved from the already defined tool position, that is, the origin (0, O) of the workpiece coordinate system to the positioning position (10.10) in the coordinate system. NC meaning
Since it is data, it is determined in the determination process of step S6 that it is a movement command block. Therefore, the CPU
1, after the determination processing in step S6 is completed, the process moves to step S8, and the tool movement direction defined in this block is determined with reference to the set and stored reversal axis, that is, the X axis. In this case, from the origin (0.0) to the positioning position - (
10.10), the amount of movement in the direction of the reversal axis is +10, and it is determined that the direction of tool movement is positive. If the movement amount is specified as an incremental amount, the sign of the movement in the reversal axis direction is checked in step S8, thereby immediately determining the sign of the movement direction of the tool.

Next, the CPU 1 moves to step S9, and determines whether or not the tool movement direction defined in this block is positive. In this case, since the tool movement direction is positive, the CPU 1 moves to step S9, and then moves to step S9. A value 1 indicating tool movement in the positive direction is set in the register R (N) that stores the tool movement direction defined by the NC data read this time.

Next, check whether the value of register R(N) and the value of register R(P) match, that is, the tool movement direction stored in register R(N) and the tool movement stored in register R(P). It is determined whether the directions match (step S
11) At this stage, the initial value 0 is set in the register R (P) that stores the previous tool movement direction, so the values of both registers are different.

Therefore, the CPU moves to step S12, and changes the tool movement direction stored in the register R (N) to the register R (
P), the current tool movement direction is defined as the previous tool movement direction, and it is determined whether the value of index j indicating the display color of the tool trajectory is less than 4 (step S13).
, at this stage, the initial value O is set for the index j, so the process moves to step Sl4, where the value of the index j is incremented, and the display color (green) indicated by the index j (=1) is displayed.
CR
A simulation is displayed in the tool trajectory display area of T7 according to the tool feed rate (step S15, see Figure 3).
.

Note that Table 2 shows the relationship between the index j and the display color.

However, the display color (colorless) corresponding to j=2 is the background color of the CRT 7.

Next, the CPU returning to step S4 increments the value of the index i, and increments the NC data of the i-th block indicated by the value of the index i (=4), that is, rGOIX10.
0. ;J is read and temporarily stored, and this NC data is displayed in the NC data display area of the CRT 7 (step S5). Note that ";" is a symbol indicating a break between NC data.

Fourth block NC data rGOIX100. ;"teeth,
This is a linear interpolation command, and in this example, it is the end point of the tool movement defined by the previous NC data, that is, from the positioning position (10, 10) in the workpiece coordinate system to the currently defined movement position (100, 10). NC means tool movement
Since it is data, it is determined in the determination process of step S6 that it is a movement command block. Therefore, the CPU
1, after the determination processing in step S6 is completed, the process moves to step S8, and the tool movement direction defined by this block is determined with the above-mentioned reversal axis as a reference. In this case, (10.10)
Since it is a movement from (1 0 0, , 1 0),
The amount of movement in the direction of the reversal axis is +90, and it is determined that the direction of movement of the tool is positive.

Next, the CPU 1 moves to step S9 and determines whether or not the tool movement direction defined in this block is positive. In this case, since the tool movement direction is positive, the CPU 1 moves to step S10. A value 1 indicating tool movement in the positive direction is set in the register R (N) that stores the tool movement direction defined by the NC data read this time.

Next, check whether the value of register R (N) and the value of register R (P) match or not, that is, the current tool movement direction stored in register R (N) and the value stored in register R (P) are checked. It is determined whether or not the previous tool movement direction matches (step S11), but the values of both registers are both ↑, indicating that the previous tool movement direction and the currently defined tool movement direction are the same.

Therefore, CPU1 moves to step S↓5 and sets the index j(
In the display color (green) indicated by =:L), the tool trajectory defined this time, that is, the tool trajectory P2 from (10.10) to (100.10), is displayed in the tool trajectory display area of the CRT 7.
Simulation display according to tool feed rate (3rd
(see figure). That is, when the tool movement direction with respect to the reversal axis is the same, the display color of the tool trajectory is not changed.

Next, the CPU returning to step S4 increments the value of the index i, and increments the NC data of the i-th block indicated by the value of the index i (=5), that is, rY15. ;J
is read and temporarily stored, and this NC data is CR
Display in the NC data display area of T7 (step 85)
.

Fifth block NC data rY15. ;J is a linear interpolation command modally applied by the code G01 specified in the 4th block, and in this example, the movement from the end point (100.10) of the tool movement defined in the previous NC data to the movement defined this time Since this is NC data indicating tool movement to position (100.15), it is determined to be a movement command block in the determination process of step S6. Therefore, C
After the determination process in step S6 is completed, the PUI is processed in step S8.
Then, the tool movement direction defined by this block is determined using the above reversal axis as a reference. In this case, (100.
10) to (1.00, 15), the amount of movement in the direction of the inversion axis is 0.

Since the tool movement direction defined in this block is neither positive nor negative, the CPU 1 executes steps S9 and S1.
After the determination process of step 6 is completed, the process moves to step S15, and the index j(
In the display color (green) indicated by =1), the tool trajectory defined this time, that is, the tool trajectory P3 from (100.10) to (100.15), is displayed in the tool trajectory display area of the CRT 7.
Simulation display according to tool feed rate (3rd
(see figure). In other words, if the direction of tool movement based on the reversal axis is neither positive nor negative, it is determined that there is no reversal of the tool movement direction on the reversal axis, and the previously specified display color is maintained. .

Next, the CPU returning to step S4 increments the value of index i, and returns the NC data of the i-th block indicated by the value of index i (=6), ie, "X{0,;"
is read and temporarily stored, and this NC data is CR
Display in the NC data display area of T7 (step S5)
.

6th block NC data rX10. ';J is a linear interpolation command in which the code GOI specified in the fourth block acts modally, and in this example, from the end point (100.15) of tool movement defined in the previous NC data to Since this is NC data indicating tool movement to the movement position (1o, 15), it is determined to be a movement command block in the determination process of step S6. Therefore, C
After the determination process in step S6 is completed, PU1 performs step S8.
Then, the tool movement direction defined by this block is determined using the above reversal axis as a reference. In this case, (100.
Since the movement is from 15) to (10.15), the movement amount in the reversal axis direction is -90, and it is determined that the tool movement direction is negative.

Since the tool movement direction defined in this block is negative, the CPUI moves to step S17 after completing the determination processing in step S9 and step 316, and
Register R that stores the tool movement direction defined by data
Set (,N) to a numerical value -{ indicating tool movement in the negative direction.

Next, check whether the value of register R (N) and the value of register R (P) match or not, that is, the current tool movement direction stored in register R (N) and the value stored in register R (P) are checked. It is determined whether or not the tool movement direction matches the previous tool movement direction (step S11).Currently, the value of register R (N) is -1, the value of register R (P) is 1, and the tool movement direction is indicates that it has been reversed.

Therefore, the CPU 1 moves to step SL2, and changes the tool movement direction stored in the register R (N) to the register R (
P), the current tool movement direction is defined as the previous tool movement direction, and it is determined whether the value of index j indicating the display color of the tool trajectory is less than 4 (step S13).
, the value of index j is 1 at this stage, so step 814
, increment the value of the index j, and increment the value of the index j
The display color (background color of CRT7) indicated by (=2),
The tool trajectory defined this time, that is, the tool trajectory P4 from (100, 15) to (1 0. 1 5>), is
The simulation is displayed in the tool path display area 7 according to the tool feed rate (see Fig. 3). That is, only when the direction of tool movement based on the reversal axis is reversed, the display color of the tool trajectory is sequentially changed.

Thereafter, as described above, the CPU sequentially reads and displays the NC data of the i block based on the incremented value of the index i (step S4, step S5), and if the read NC data is a movement command block. For example (step S6), the moving direction of the tool defined in the block is determined using the above reversal axis as a reference (step S8), and only if the moving direction has a movement portion in the reversing axis direction,
The tool movement direction in the block is compared with the previous tool movement direction having a movement portion in the reverse axis direction (steps 89 to 811 or step 89, step 816, step S17, step S11), and the tool movement direction in the block is compared If the movement direction of the block is the same as the previous tool movement direction that has a movement component in the reverse axis direction, the tool movement locus defined in the block is drawn in the same display color as the previous time (step S15), and If the direction of tool movement in the block is different from the previous tool movement direction that had a movement portion in the reversal axis direction, it is assumed that there has been a reversal of the movement direction, and the current tool movement direction is set as the previous tool movement direction. By defining the tool movement direction as a comparison target, that is, the value of register R (P) is updated and stored (step S12), and the display color is changed within the set and stored display color range (step S13). The changed display color is sequentially changed (step S14), and the tool movement trajectory defined by the block is drawn using the changed display color (step S15).
. Note that when changing the display color of the tool trajectory according to the reversal of the moving direction, if the value of the index j that specifies the display color has already reached 4 (step S13, step S18),
As shown in Table 2, the last display color (yellow) that was set and memorized means that the previous tool path has already been drawn, so in this case, reset the value of index j to O. Then, a display color is selected cyclically from among the display colors set and stored. Furthermore, as a result of the processing in step S8, if it is determined that the tool movement defined this time does not include some movement in the reverse axis direction, the tool movement locus defined in the block is displayed in the same way as the previous time. Draw in color (step S15).

In the program list shown in Table 2, tool trajectories P3, P5, P7, . Since P9 does not have a moving component in the direction of the reversal axis, these tool trajectories P
3, P5, P7, and P9 are tool paths P2 defined in each of the 4th block, 6th block, 8th block, and 10th block, each having a movement component in the reversal axis direction.
, P4, P6. It will be drawn in the same display color as P8 (see FIG. 3).

Then, when the drawing process for all the machining programs to be drawn is completed and the NC data indicating the program end, such as M30, is read, the CPU
After displaying the C data in the NC data display area of the CRT 7 (step S5) and executing the determination processing in steps S6 and S7, all processing is completed.

According to this embodiment, each time the moving direction of the tool on the set and memorized reversal axis is reversed, the display color of the tool trajectory defined by the NC data of the block is sequentially changed and drawn. The interval between the tool trajectories in the axial direction is narrow and the tool trajectories defined by the NC data of each block are CR.
Easily identify the tool trajectory defined by each NC data, especially the tool trajectory in the X-axis direction, which is the main feeding direction of the tool, even if they touch or overlap on the TT. I can do it. In addition, as mentioned above, since it is possible to select any one axis from among the X, Y, and Z axes as the reversal axis, it is possible to select the direction of tool trajectories that are likely to overlap in the machining program to be drawn. The optimum reversal axis can be set and stored in consideration, and the same effect as described above can be achieved no matter which axis is selected as the reversal axis.

Furthermore, in this embodiment, when drawing the tool trajectory defined in each block, the trajectory of the tool tip is drawn moment by moment using a simulation display based on the tool feed rate. Even if the defined tool path (in this case the X-axis direction) is displayed completely overlappingly on the same dot on the CRT 7, it is possible to reliably grasp the tool feed direction defined in each block. can.

Note that when the display color corresponding to the index j=2, that is, the background color of the CRT 7 is used, the tool trajectory defined by the block is not substantially displayed on the CRT 7. Therefore, the display of complicated tool trajectories that touch or overlap can be appropriately thinned out, and the display screen can be made easier to see. Moreover, since each display color is a set value, mutually distinguishable colors can be appropriately set. For example, by setting the display color corresponding to index j=2 to a color such as purple, it is possible to prevent unnecessary thinning display from being performed during a thin tool trajectory.

Although the specific effects have been explained above by taking as an example the case where a machining locus is simply displayed two-dimensionally on a graphic display, the effects of the present invention are particularly noticeable in a three-dimensional display drawing method. For example, when drawing a machining trajectory for cutting a curved surface, the display color of the machining trajectory is updated every time the direction of tool movement is reversed, and as a result, the display colors of adjacent machining trajectories are always different. What is the conventional drawing method in which even if the outline of the processed shape is drawn overlappingly, the inside of the maximum outline displayed two-dimensionally on a graphic display using isometric projection etc. is completely filled with a single color? Differently, the outline of each shape can be recognized separately from other shapes that overlap with it, making it easier to grasp the processed shape as a whole.

Effects of the Invention The machining shape drawing method of the present invention displays a graphic display by sequentially changing the display color of the tool trajectory defined by the NC data of the block each time the moving direction of the tool in the set and memorized coordinate axes is reversed. Since the tool trajectories are drawn on the top, even if the tool trajectories defined by the NC data of each block are narrow and the tool trajectories defined by the NC data of each block touch or overlap on the graphic display, the tool trajectories defined by the NC data of each block will be drawn. tool trajectories can be easily identified.

Therefore, the tool trajectory of each part can be easily identified when the entire machining shape is displayed, that is, the magnification of the drawing screen is set to a small value, and the tool trajectory and the entire machining shape can be confirmed on the same screen. This reduces the amount of time required for confirmation.

Furthermore, compared to conventional methods using graphic displays with similar magnification and resolution, the substantial resolution of the graphic display can be improved without changing the hardware.

[Brief explanation of drawings]

Fig. 2 is a block diagram showing the main parts of an automatic NC programming device according to an embodiment of the invention, and Fig. 2 shows an outline of a drawing processing program adopted in the automatic NC programming device according to the embodiment. The flowchart, FIG. 3, is a diagram showing an example of a tool trajectory displayed on a graphic display. 1... Processor (CPU), 2... ROM, 3
...RAM, 4...NC data storage memory, 5...
・Keyboard, 6...Disk controller, 7...
・Graphic display (CRT), 8... bus, FL... floppy disk, P1 to P9...
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Nachome Pavilion Figure 1

Claims (1)

[Claims] In a machining shape drawing method that draws a tool trajectory defined by NC data on a graphic display, coordinate axes are set and memorized in advance, and the NC data is read block by block to determine the direction of tool movement in the set coordinate axes. A machining shape drawing method characterized in that the display color of a tool trajectory defined by the NC data is sequentially changed and drawn each time the direction of movement is reversed.