JPH04177409A - Tool locus display device - Google Patents

Abstract

PURPOSE:To reduce the graphic plotting processing frequency and to display graphics at a high speed by skipping the machining program information based on a shift vector obtained from the machining program information. CONSTITUTION:A single block is read out of the machining program information (a) stored in a machining program storage part 10 through a block reading part 11, and the block position command information (b) is extracted. A shift vector calculation part 16 calculates a shift vector based on the information (b) and a present graphic position information and at the same time compares the shift vector with the plotting unit value (c) stored previously. If the shift vector is smaller than the value (c), a reading request (d) of the next block is transmitted. If the shift vector is larger than the value (c), the position command information (e) of the present block is sent to a plotting command generating part 12. At the pert 12 a drawing command (f) is produced based on the information (e).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tool trajectory display device, and particularly to a tool trajectory display device that displays a tool movement trajectory instructed by a machining program of a numerically controlled machine tool.

[Prior Art] FIG. 9 is a block diagram of a conventional tool trajectory display device that displays the movement trajectory of a tool instructed by a machining program of a numerically controlled machine tool.

In FIG. 9, the conventional tool trajectory display device includes a machining program storage unit 10 that stores machining program information, a block reading unit 11 that reads one block of the machining program information, and extracts position command information of the block.
a drawing command generation unit 12 that generates a drawing command based on the position command information extracted by the block reading unit 11; a graphics control unit 13 that controls graphic drawing based on the drawing command generated by the drawing command generation unit 12; The operation of the conventional tool path display device configured as described above will be described.

One block is read out by the block reading section 11 from the machining program information a stored in the machining program storage section 10, and position command information of the block is extracted. The position command information extracted by the block reading section 11 is sent to the drawing command generation section 12, and the drawing command generation section 12 generates a drawing command f based on the position command information S. The drawing command t generated by the drawing command generation section 12 is sent to the graphics control section 13, and the graphics control section 13 controls graphic drawing based on the drawing command f, and displays the graphic drawing on the CRT 14.

On the other hand, when the graphic control unit 13 completes the graphic drawing process for one block of data of the machining program information, it sends a graphic completion signal g to the block reading unit 11 in order to draw the next block.

When the block reading unit 11 receives the graphic completion signal g, it reads the next block of machining program information stored in the machining program storage unit 10, extracts the position command information of the block, and repeats the above-described operation.

Graphical display is performed by the above operations.

[Problems to be Solved by the Invention] As described above, in the conventional tool path display device, position command information is extracted for each block and graphically displayed based on the position command information.

However, recently, processing program information for mold processing is increasingly created from data on schools of fish that continuously move minutely, so if the conventional graphic drawing process is performed for each block, Since it takes time to process graphics such as the tool path, tool position display, envelope showing the tool passing space, and display of the material cut by the tool, it takes a lot of time to complete all graphic displays (checking the machining program). I was spending a lot of time.

Even if such a large amount of time is spent, it is almost difficult to recognize detailed position commands from the resulting graphic display, although the general shape can be recognized visually. Therefore, when it comes to displaying minutely moving blocks, it is often wasteful to display them graphically in detail, and it can be said that it is more efficient to display the graphics within a recognizable range.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a tool trajectory display device that can display a machining program graphically at high speed and allow the machining program to be checked in a short time.

[Means for Solving the Problems] In order to achieve the above object, a tool path display device according to the present invention includes a block reading means for reading out one block of a machining program, and a block read out from the block reading means. It has a movement vector calculation means that calculates a movement vector from position command information and current graphic position information, and a drawing unit amount storage unit that is set and stored in advance, and the movement vector calculated by the movement vector calculation means is Recognizes blocks that exceed the drawing unit amount,
The movement locus of the tool is graphically drawn based on the position command information of the recognized block and the current graphic position information.

[Operations] Therefore, according to the tool trajectory display device of the present invention, the machining program can be graphically displayed at high speed, and the machining program can be checked in a short time.

[Example code] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram of a tool trajectory display device of the present invention that displays a tool movement trajectory instructed by a machining program of a numerically controlled machine tool.

In FIG. 1, the tool path display device of the present invention includes a machining program storage section 10 that stores machining program information, a block reading section 11 that reads one block of the machining program information, and extracts position command information of the block. , calculates a movement vector from the drawing unit amount storage unit 15 that sets and stores the drawing unit amount, the block position command information read from the block reading unit 11, and the current graphic position information, and calculates the movement vector from the block position command information and the current graphic position information. A movement vector calculation unit 16 that compares the drawing unit amount stored in advance in the drawing unit amount storage unit 15 and sends position command information to the drawing command generation unit 12 only when the movement vector exceeds the drawing unit amount. , a drawing command generation unit 12 that generates a drawing command based on the position command information input from the movement vector calculation unit 16, and a graphic control that controls graph ink drawing based on the drawing command generated by the drawing command generation unit 12. 13, and a CRT 14 that is controlled by the graphics control section 13 and displays graphic drawings.

The operation of the tool trajectory display device of the present invention configured as described above will be described below.

One block is read out by the block reading section 11 from the machining program information a stored in the machining program storage section 10, and position command information of the block is extracted. The position command information extracted by the block reading section 11 is sent to the movement vector calculation section 16. The movement vector calculation unit 16 calculates a movement vector from the block position command information read out from the block reading unit 11 and the current graphic position information, and calculates the movement vector and the data stored in the drawing unit amount storage unit 15 in advance. The movement vector is compared with the drawing unit Inc.
When it is smaller than tc, a next block read request d is sent to the block read unit 11 in order to skip the current block. On the other hand, if the movement vector exceeds the drawing unit Etc, the movement vector calculation unit 16
sends the position command information e of the current block to the drawing command generation section 12. The drawing command generation unit 12 generates a drawing command f based on the position command information e of the current block. The drawing command f generated by the drawing command generation section 12 is sent to the graphics control section 13, and the graphics control section 13 controls graphic drawing based on the drawing command f, and displays the graphic drawing on the CRT 14.

On the other hand, when the graphic control unit 13 completes the graphic drawing process for one block of data of the machining program information, it sends a graphic completion signal g to the block reading unit 11 in order to draw the next block.

When the block reading unit 11 receives the graphic completion signal g, it reads out the next block of machining program information stored in the machining program storage unit 10, extracts the position command information of the block, and repeats the above-described operation. Graphical display is performed by the above operations.

Next, a second section showing the operation contents of the tool trajectory display device of the present invention will be described.
This will be further explained using the flowchart shown in the figure.

First, the movement vector calculation section 16 starts with the drawing unit amount storage section 15.
The drawing unit amount stored in is set as Pd (step 51), and the current graphic position information is set as Po (step 52).

Next, one block is read out by the block reading section 11 from the machining program information stored in the machining program storage section 10, and the position command information of the block is extracted and set as Po (step 53).

If the block reading unit 11 detects the end of the program in the reading process of one block, it ends the graphic drawing process (step 54), and if the program does not end, it determines whether the read one block is a straight block. (step 55).

If the read one block is not a straight line block, the process jumps to drawing command generation processing (step 58), and if it is a straight line block, next, the movement vector calculation unit lδ reads out the current block read out from the block reading unit 11. A movement vector is calculated from the position command information Pc and the current graphic position information Po (step 56).

Here, the movement vector calculation method will be explained. Third
The figure shows an example of a machining program created using minute point group data. In FIG. 3, the cutting feed command G. 1, the point P 1 (X I , yt .

z ), point P2 (X2.y2.z2), point P3 (X3
, Y3-Z3) """ point Pn (Xn"n'
2) indicates that the position command information is instructed.

Further, FIG. 4 is a graphical display 1 that displays the movement locus of the tool created by the machining program shown in FIG.

Figure 5 shows point P1P, which is part of the graphical representation J shown in Figure 4.
2P3... is an enlarged view of the graphic part of Pn.

FIG. 6 is a diagram showing the relationship in which the movement vector ΔV is determined from the movement components ΔX1Δy1Δ2 of each axis determined from the position command information of the machining program. Then, the movement vector ΔV is determined by the following formula.

ΔV-m "871...(1) Then, the movement vector (Pv) obtained from the current block position command information Pc and the current graphic position information PO by the above equation (1), and the drawing unit amount Storage part 1
The movement vector calculation unit 16 compares the drawing unit amount Pd stored in advance in Step 5 with the movement vector calculation unit 16 (step 57), and if the movement vector is smaller than the drawing unit amount (Pv<Pd), the block is read out in order to skip the current block. Part 1
1 (return to step 53).

When the movement vector exceeds the drawing unit amount (Pv≧Pd)
, the movement vector calculation unit 16 sends the position command information Pc of the current block to the command generation unit 12, and the drawing command generation unit 12 generates a drawing command based on the position command information Pc of the current block ( Step 5
8).

The drawing command generated by the drawing command generating section 12 is sent to the graphics control section 13, and the graphics control section 13 controls the drawing of graphics based on the drawing command to display the drawing on the CRT 14 (step 59).

Thereafter, it is determined in the graphic control unit 13 whether the graphic drawing display of one block data of the machining program information has been completed (step 60), and if the display has not been completed, step 60 is repeated. When the display is completed, the graphic control unit 13 sets the position command information Pc of the current block to the current graphic position information PO (step 61), and sends a graphic completion signal to perform the graphic drawing process of the next block. Send to block reading unit 11, step 53
Return to

When the block reading unit 11 receives the graphic completion signal, it reads out the next block of machining program information stored in the machining program storage unit 10, extracts the position command information of the block, repeats the above-mentioned operation, and ends the program. The process continues until it is detected (step 54).

FIGS. 7 and 8 show an example of a graphical display according to the present invention. Figure 7 shows minute point fresh fish P1 instructed by the processing program.
1, PI3, PI3, PI3, is a diagram showing a movement command to PI3.

On the other hand, FIG. 8 is a diagram showing a graphic display when the drawing unit amount Pd is set. That is, position P −
Since the movement vector ΔP11→P12 of P is smaller than the drawing unit amount Pd as shown in FIG. 8, the position command P is skipped, and the position command P13 is changed to the movement vector ΔP1
-P13 is larger than the drawing unit amount Pd, so the graphic control unit 13 draws and displays the graphic.

Similarly, a graphical representation of P1□-PL3=PI3 is shown.

[Effects of the Invention] As explained above, according to the tool trajectory display device of the present invention, the machining program information is skipped based on the movement vector obtained from the machining program information, so the number of graphic drawing processes is reduced. This has the effect of allowing high-speed graphic display.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a tool trajectory display device of the present invention that displays the movement trajectory of a tool instructed by a machining program of a numerically controlled machine tool, and FIG. 2 is a block diagram of a tool trajectory display device of the present invention shown in FIG. A flowchart diagram showing the operation contents, Figure 3 is a diagram showing an example of a machining program created using minute point group data, and Figure 4 is a figure displaying the movement trajectory of the tool created by the machining program in Figure 3. A diagram showing an example of a display, FIG. 5 shows points P1P2, which are part of the graphical display shown in FIG.
P3... Figure 6 is an enlarged diagram of the graphic part of Po. Figure 6 is a diagram showing the relationship for determining the movement vector ΔV from the movement components ΔX, Δy, and Δ2 of each axis found from the position command information of the machining program. Fig. 7 shows an example of the graphical display of the present invention, showing a group of minute points PIP2P3... instructed by the machining program.
Figure 8 shows the graphic display when the drawing unit amount Pd is set. Figure 9 shows the movement trajectory of the tool instructed by the machining program of the numerically controlled machine tool. FIG. 2 is a block diagram of a conventional tool trajectory display device that displays a tool trajectory. 10... Machining program storage unit 11... Block reading unit 12... Drawing command generation unit 13 - Graphic control unit 14... CRT 15... Drawing unit amount storage unit 16... Movement vector calculation unit

Claims (1)

[Scope of Claims] A tool path display device that displays a movement path of a tool instructed by a machining program of a numerically controlled machine tool, comprising: block reading means for reading out one block of the machining program; a movement vector calculation means for calculating a movement vector from the position command information of the block and the current graphic position information, and a drawing unit amount storage unit that is set and stored in advance, and the movement calculated by the movement vector calculation means A tool path display device characterized in that a block whose vector exceeds the drawing unit amount is recognized, and a tool movement path is graphically drawn from position command information of the recognized block and the current graphic position information.