JPS63213003A - Nc device with pre-reading picture drawing function - Google Patents

Abstract

PURPOSE:To check a preceding block concurrently with an actual cutting process by drawing the movements following a position which is under execution or the movement preceding by several blocks of a working program before its actual execution. CONSTITUTION:An NC unit 1 analyzes an NC program stored in a CMOS memory 11 by a CPU 10 and outputs the shift command pulses to servo systems 5A and 5B. At the same time, the shift data are written into a dual port memory 3. While the CPU 10 calculates the pre-read data from the NC program and writes it to the memory 3. Both the shift data and the pre-read data written into the memory 3 are stored in a RAM 21 of a graphic data processing part 2 and analyzed. Then the graphic data is drawn on a display part 4 by a graphic controller 22 via a video RAM 23.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an NC device with a drawing function.

[Conventional technology]

Conventionally, an NC device for a machine tool with a drawing function operates the NC device using an NC language, samples moving tool positions, and draws a trajectory.

FIG. 4 is a block diagram of a conventional example of an NC device having a drawing function.

The NC device is composed of an NO unit 1 and a display section 4, and the NC unit 1 is further composed of a man-machine interface section 15, an NC data analysis section 16, and a function generation section I7. Man-machine interface section 15
The NC program 18 or manual input data (MDI) 19 input to the servo unit 5 is calculated by the NC data analysis unit 16, and the function generation unit 17 inputs the calculation result to generate a movement command pulse and output it to the servo unit 5. . The display section 4 receives the current position data of the tool movement from the servo section 5, samples it at regular intervals, and draws it as a trajectory. Normally, the functions of the NO data analysis section 16 and the function generation section 17 are performed by a CPU.

When creating a Canadian program for the workpiece, run the NC program 8 while locking the movement of the mechanical part.
The movement of the tool on the software is drawn on the display unit 4,
Check whether the program is correct, then unlock the mechanical part and start the actual cutting.

Another conventional example of the drawing function of an NC device is one that includes an NC language and its analysis section 16A inside a display section 4A, as shown in FIG. When this device performs drawing, all drawing is performed inside the display section 4A without operating the NC unit 1 at all. When cutting with a new Canadian program, first the drawing function of the display section 4A is used to determine whether the program is correct or not, and then the NC unit is operated to start actual cutting.

[Problem that the invention seeks to solve]

The above-mentioned conventional NC device with a trajectory drawing function only displays the trajectory of the part where the movement has been completed while a movement command is being executed, but does not indicate what kind of movement will be performed beyond the current position, which is called in NC language. Since it is not possible to display an image of how a block will move one block ahead, there is a drawback that movement cannot be predicted at all. That is,
Whether it is when creating a new processing tape, changing or making corrections to the cutting conditions of the blade,
Unless you run the NC program once, you will not be able to understand the movement of the tool. Therefore, a considerable amount of setup work and time are required.

The present invention has been made in view of this situation, and by drawing the movement after the currently executed position or the movement several blocks ahead in the cannibal program before execution, it is possible to simultaneously perform cutting while actually cutting. An object of the present invention is to provide an NC device with a look-ahead drawing function that can check blocks.

[Means for solving problems]

The NC device with a look-ahead drawing function of the present invention has a memory in which an NC block diagram is stored, and analyzes the contents of the memory to determine movement data and an NC block diagram after executing movement corresponding to the movement data. an NC unit that calculates and outputs look-ahead data that is data related to interpolation paths on the block diagram; a dual port memory that stores movement data and look-ahead data output from the NC unit;
It has a graphic data processing section that inputs the contents stored in the dual port memory and outputs it as graphic data, and a display section that displays the graphic data.

(Function) The NC unit stores the NC program in the memory within the unit, analyzes the NC program to calculate movement data and desired preread data, and the graphic data processing section stores the movement data and desired preread data. Data is input via dual port memory, processed graphically, and displayed on the display.

In this way, by simultaneously drawing the movement data and the pre-read data on the same display, it is possible to cut while checking the interpolation path on the program after the movement currently being executed.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of an NC device with a prefetch drawing function according to the present invention, and FIG. 2 is a flowchart of drawing processing performed by the device shown in FIG.

The Kinomi style side does not display the movement data transferred from the servo section 5 like the device shown in FIG. 4, but transfers the movement data together with the pre-read data from the NC unit 1 to the graphic data processing section 2. , which is displayed on the display section 4 by processing the graphic data.

NC unit 1 is a CMOS that stores the NC block diagram.
It has a memory 11, and the CPU 10 has a CMOS memory 1]
After storing the NC program in the controller, it analyzes the NC program, issues movement command pulses to the servo systems 58 and 5B, and writes movement data to the dual port memory 3. Further, the PIIIO calculates pre-read data from the NC block diagram and writes it into the dual port memory 3. The graphic data processing section 2 is a CPU 20.

RAM2], graphics controller 22, and M23 to video R; (:PU20 stores movement data and preread data held in dual port memory 3 in RAM21, analyzes this data, and sends graphics controller 22 to It is operated to draw graphic data on the display unit 4 via the video RAM 23.The drawing is executed in synchronization with a servo motor (not shown).

Next, the operation of this embodiment will be explained.

In this embodiment, in addition to the current position data (movement data) that is actually executed, the movement of the current block and the next block in the NC program and the drawing process of the end point of each block are added as pre-read data. Each piece of data is drawn in a distinguishable form.

The drawing process is as follows.

First, initial setting values are set (step 31). Next, it is determined whether the material shape has been initialized (step 32), and if it has been initialized, the drawing range is set (step 34), and if it has not been initialized, the material shape is input (step 34). After step 33), the drawing range is set (step 34). Next, the material shape is drawn within the drawing range set in step 34 (step 3
5).

The above settings are entered manually (MDI).

When the drawing start key is pressed here (step 36), drawing processing is performed (step 37). First, the current value position is drawn, the current block path is drawn, the current block end point is drawn, the next block path and the next block end point are drawn. In addition, necessary position display and command display are performed. The above drawing process is repeated, and when it is determined that the drawing has ended (step 38), the drawing is cleared by manual input (step 39), and all processing ends.

FIGS. 3(A) and 3(B) are display examples of movement data and prefetch data.

In both figures, the locus of movement is displayed as a solid line. In FIG. 3(A), the movement of the next block is displayed as a dotted line, and after the movement is executed, the user can trace the line. In addition, FIG. 3(B) shows
The end point of the next block is displayed by flickering the point, and when the movement to the point is completed, the end point of the next block is flickered again.

In this embodiment, one interpolated locus and its pre-read data are drawn, but by processing a plurality of programs in the NC unit, it is possible to draw a plurality of trajectories and their pre-read data on the same screen.

〔Effect of the invention〕

As described above, the present invention provides the following effects by processing the movement data and pre-read data output by the NC unit into graphic data and displaying them simultaneously on the same screen.

l) You can visually check the movement of the next block, 2) You can check for interference with the cutter in advance, 3) You can prevent the workpiece from digging into the workpiece and cutting too much, 4 ) Even with new tape, you can check the tape while actually cutting it. 5) You can save time on steps. 6) You can cut with confidence because you can visually check the movement of the block at the tip of the blade.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of an NC device with a look-ahead drawing function of the present invention, FIG. 2 is a flowchart of drawing processing by the device of FIG. 1, and FIGS. A display example of pre-read data, FIG. 4 is a block diagram of a conventional example of an NC device having a drawing function, and FIG. 5 is a diagram showing a conventional example of the drawing function of an NO device. DESCRIPTION OF SYMBOLS 1...NC unit, 2...Graphic data processing part, 3...Dual port memory, 4...Display part, 58, 5B-...Servo part, 10.20...CPU. 11...CMOS memory, l8-NC program, 19-MDI, 21
φ...RAM. 22...Graphic controller, 23...Video RAM 0

Claims (1)

[Claims] A memory in which an NC program is stored is provided, and the contents of the memory are analyzed to obtain movement data and an interpolated path on the NC program after the movement corresponding to the movement data is executed. an NC unit that calculates and outputs pre-read data that is data related to the above, a dual port memory that stores movement data and pre-read data output from the NC unit, and a dual port memory that inputs the contents stored in the dual port memory. An NC device with a look-ahead drawing function, comprising: a graphic data processing unit that outputs graphic data; and a display unit that displays the graphic data.