JPS60246408A - Working state display device - Google Patents

Abstract

PURPOSE:To confirm easily what kind of working, and in what sequence is executed thereafter, by discriminating a working state up to some stage, and a working state to the next stage, and executing its graphic display on a CRT picture. CONSTITUTION:When a picture key is depressed, a microcomputer 10 transfers the contents of a graphic RAM22 first, and subsequently, reads one block from an NC command program stored in a memory 14, and stores necessary imformation in a memory 12. Subsequently, whether the read information is a movement command block or not is discriminated, and the processing is repeated until a moving block is read out. When the movement command block is read, the microcomputer 10 drives tool locus data such as a start point, an end point or a radius, etc. of a tool locus, and stores them in the RAMs 21, 22. When this processing is ended, the contents of the graphic RAMs 21, 22 for displaying working state are outputted to a display block 25, and the contents of the RAM21 and the contents of the RAM22 are displayed on the present working state display area 26a, and the next working state display area 26b, respectively.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a machining status display device that displays on a CRT screen what kind of machining will be performed when machining a workpiece using a numerically controlled machine tool. It is something.

Conventional technology and problems When machining a workpiece with a numerically controlled machine tool, it is difficult for the operator to check in advance what kind of machining will be performed and in what order based on a pre-given NC command program, etc. This may lead to incorrect machining. This is important in preventing

Conventionally, this kind of confirmation was done by locking the machine and stopping the movement of the machine, and by using the single block function.
This was done by executing the NC command program block by block and the operator checking the machine position displayed on the display panel, but since only the final point of each block was displayed, it was difficult to check accurately. .

For this reason, in recent years, tool trajectories have been graphically displayed on a CRT screen from information obtained by decoding NC command programs. However, conventional tool path display displays the tool path from a certain point, such as the beginning of an NC command program, as one continuous path, so it is easy to see what kind of machining is being performed at what stage. This is especially difficult when the tool trajectories intersect.

Purpose of the Invention The present invention improves these conventional drawbacks, and
The purpose of this is to make it easy to check what kind of machining will be done and in what order based on a pre-given NC command program when machining a workpiece with a numerically controlled machine tool. .

Structure of the Invention The gist of the present invention is to use a machining state display device in a numerical control device, etc. to decode a pre-input NC command program, etc., and display the machining state, such as the tool trajectory or workpiece shape, up to a certain stage. A means for creating display information necessary to display two types of machining states on a CRT screen, including a machining state up to the next stage, and a means for displaying two types of machining states created by the means on a CRT screen that is preset. The present invention provides a machining state display device comprising means for displaying graphics in a current machining state display area and a next machining state display area, respectively. In this way, the machining status up to a certain stage and the machining status up to the next stage are distinguished and displayed graphically on the CRT screen, so the operator can compare the two types of machining status displayed and determine what will happen next. It is possible to easily confirm the order in which the different types of processing are performed.

Embodiment of the Invention FIG. 1 is a block diagram showing an example of the hardware configuration of the device of the present invention, in which 10 is a microcomputer;
1 is a ROM that stores programs and the like necessary for the microcomputer 10 to execute predetermined operations; 2 is a RAM used for pointers and calculations; 13 is an address decoder for accessing memory, etc.; 14 is a A CMOS memory that stores NC command programs, 15 a manual data input device (MDI) provided in the NC device, and 16 a CRT that generates horizontal and vertical synchronization signals and scan addresses.
A controller, 17 is a pulse oscillation circuit, 18 is an address switching circuit that switches between the CPU address and the scan address, 19 is an address decoder, and 21 is a CRT screen that stores display characters in accordance with the position of the display screen. a graphic RAM 22 having a storage area corresponding to each dot in the 26 current machining state display areas 26a;
is a graphic RAM having a storage area corresponding to each dot in the next processing state display area 26a of the CRT screen, and both graphic RAMs have the same capacity. Further, the edict is a character ROM that converts the output of the character RAM 20 into character pattern data, and 24 is a character ROM 23.
A display control circuit generates a video signal based on the output of the graphic RAM 21, 22, 25 is a display section, and 26 is a CRT screen, which has a current machining state display area 26a and a next machining state display area 26b.

The microcomputer 10 reads the NC command program stored in the CMOS memory 14 one block at a time, decodes it, determines the tool trajectory if the block is a movement command, and stores it in the graphic RAM 21.
Write to 22. The contents of the graphic RAM 21.22 are transferred from the CRT controller 16 to the address conversion circuit 18. The scanning address that has passed through the address decoder 19 is cyclically output, a video signal is created by the display control circuit 24, and is input to the disk 1174 section δ.

The graphic RAM 2] is cyclically accessed by the scan address from the address decoder 19, but its capacity is only the capacity corresponding to the current machining state display area 26a, and when the scan address finishes scanning one screen, the graphic RAM 2 is accessed cyclically by the scan address from the address decoder 19. An address space is allocated so that the contents of the RAM 21 are displayed in the current machining state display area 26a. In addition, the capacity of the graphic RAM 22 is limited to the capacity corresponding to the next machining state display area 26b, and the address space is such that when the scan address finishes scanning one screen, the contents of the graphic RAM 22 are displayed in the next machining state display area 26b. Assigned.

FIG. 2 is a flowchart showing an example of the software configuration of the apparatus of the present invention. Microcomputer 10 is MD
Each time the screen key 115 is pressed, the process shown in FIG. 2 is executed. When the screen key is pressed, the microcomputer 10 first transfers the contents of the graphic RAM 22 to the graphic RAM 21 (Sl). Next, one block is read from the NC command program stored in the CMOS memory 14 (S2). This reading is performed from the beginning of the program in the order indicated by a pointer (not shown), and after reading, the pointer is counted up. Next, decode the read block and store the necessary information in the memory (33)
Next, it is determined whether the read information is a movement command block (34), and if it is a movement command block, step S
If not, the process returns to step S2 and the above process is repeated until the moving block is read out.

When the movement command block is read, microcomputer 1
0 obtains tool trajectory data such as the start point, end point, or radius of the tool trajectory from the decoding information (S5), and converts this to Graphic R.
It is stored in AM21 (S6).

When the microcomputer 10 completes the above processing, it switches the address switching circuit 18 to the scan address side of the CRT controller 16, and switches the address switching circuit 18 to the scanning address side of the CRT controller 16.
2 is output to the display block δ. As a result, the contents of the graphic RAM 21 are displayed in the current machining state display area 26a, and the contents of the graphic RAM 22 are displayed in the next machining state display area 26b.

FIGS. 3(a) to 3(d) are diagrams showing display examples of tool trajectories according to the present invention. When the screen key is pressed for the first time, nothing is stored in the graphic RAM 2], 22, so the first tool path β created by decoding the first movement block is displayed in the next machining status display area 26b. is displayed, and nothing is displayed in the current machining state display area 26a. When the screen key is pressed again, the contents of the graphic RAM 22 are transferred to the graphic RAM 21, and the tool path 12 created by decoding the next movement block is stored in the graphic RAM 22, so that the screen shown in FIG. 3(b) A display as shown will be made. When the screen key is pressed again, the third
As shown in Figure (C), the next tool trajectory 13 is displayed in the next machining state display area 26b, and the previous tool trajectory is displayed in the current machining state display area 26a. FIG. 4(d) shows an example of the display when the screen key is further pressed, and up to the tool path 24 is displayed in the next machining display area 26b.

In the above embodiments, the tool trajectory was used as the figure representing the machining state, but the shape of the workpiece, such as the contour line, cross-sectional view, etc., is input in advance, and each block is determined from the machining contents obtained by decoding the NC command program. Alternatively, it calculates the shape of the workpiece to be machined at that time for each machining command block, and displays the shapes of the previous and subsequent workpieces in the current machining status display area 26a and the primary machining status display area 26b on the CRT screen. It may be configured to do so.

As described in detail, the present invention uses a machining state display device in a numerical control device, etc. to decode a previously inputted NC command program, etc., and display the machining state, such as the tool trajectory or workpiece shape, up to a certain stage. A means for creating display information necessary to display two types of machining states, ie, a machining state up to the next stage, on a CRT screen, and a means for presetting the two types of machining states created by the means on a CRT screen. It is equipped with means for displaying graphics in the current machining state display area and the next machining state display area, respectively. Since it is displayed graphically, the operator can easily confirm what kind of machining will be performed and in what order by comparing the two types of displayed machining states. Therefore, it is possible to easily check the NC command program and give instructions to the operator.

[Brief explanation of drawings]

FIG. 1 is a block diagram of main parts showing an example of the hardware configuration of the present invention, and FIG. 2 is a flowchart showing an example of the software configuration of the present invention. Figure @3 is a diagram showing a display example according to the present invention. ]0 is a microcomputer, 2], 22 is a graphic
25 is the display section, 2 is the CRT screen,
26a is a current machining state display area, and 26b is a next machining state display area.

Claims (1)

[Claims] A machining status display device in a numerical control device, etc. decodes the NC command program input in advance and displays two types of machining status: tool trajectory or workpiece shape up to a certain stage, and machining status up to the next stage. A means for creating display information necessary to display the machining state on a CRT screen, and two types of machining states created by the means are displayed in a preset current machining state display area and a next machining state display area on the CRT screen. A machining status display device characterized by comprising means for displaying graphics on each.