JPH0259256A - Display method for movement of tool in nc machine tool - Google Patents

Abstract

PURPOSE:To visually display the moving direction and method of a tool by reading the contents of the programs in several blocks of NC program prior to the movement of a machine, finding the movement information of a tool in advance from the contents thereof, converting it in a visual display signal and visually displaying it on CRT. CONSTITUTION:In the case of a program check mode, the contents of the work programs of several among the programs of each working stage stored in a work program memory 3 are read by preceding to the movement of a machine by a work program prereading circuit part 10. The moving amt. of a tool, moving direction and method are then found from the contents of this read work program by the tool moving amt., moving direction and method arithmetic circuit 11, converted into a visual display signal by a visual display signal converting circuit 12, impressed on a CRT 7 via an I/O device 9 and displayed on the CRT 7. Consequently how far a tool being moved in which direction by what method according to the work program can visually be known in advance.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an NC machine tool in which the direction in which a tool moves according to a machine program is visually displayed on a CRT. The present invention relates to a method for displaying the movement of a tool in a machine.

[Conventional technology]

In an NC machine tool, an NC machining program is required to continuously machine a workpiece. It is necessary to perform a program check on a newly created NC program before continuous processing to prevent programming errors. At the time of program check, movement of the machine, etc. is checked while displaying program information on a CRT provided in the NC machine tool.

As shown in Figure 2, the CRT installed in conventional NC machine tools displays the contents of the program (memory), current command value, spindle rotation speed limit, actual spindle rotation speed, feed override, spindle override, and rapid traverse. Override, blade edge position, remaining travel amount, etc. were displayed numerically.

[Problem to be solved by the invention]

Checking of the program was carried out in the program check mode while checking the contents of the program to be executed and the program to be executed next on the CRT. However, since Canadian program information is displayed numerically, the most important thing to check is the direction, how much, and how the tool's cutting edge actually moves, depending on the coordinate system of the workpiece being used. Since the operator has to calculate each time from the current tool position information 1fii (edge position) and the remaining travel distance, it takes time to check the program, and overlooking mistakes in the cutting program can cause machine collisions, interference, etc. There were issues such as safety issues due to the possibility of

In addition to the current numerical display of tool movement information according to the cannibal program, the movement direction and movement method are displayed on a CRT using arrows and color coding, like a vector diagram, so that the tool can move to the next block. The purpose is to visually display in which direction, how to move, and for how long.

[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention reads the program contents of several blocks of an NC program in advance of the transfer of the machine, and transfers the read programs. The tool movement information is obtained in advance from the contents of the program, the obtained tool movement information is converted into a visual display signal, and this visual display signal is applied to the CRT to display the tool movement information corresponding to the program as a symbol or as appropriate. NC is characterized in that it is visually displayed on a CRT in the colors of
This is a method for displaying the movement of tools in machine tools.

[Effect]

According to the present invention, while checking the NC program in the program check mode, the NC
The program contents of several blocks of the NC machine program are read before the machine moves, and from the contents of the read NC machine program, in addition to the amount of tool movement, the direction of tool movement of the block being executed and the next block is determined. It is displayed on the CRT in the form of a vector diagram with arrows, which are color-coded according to the movement method.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Fig. 1 is a block diagram showing a configuration for displaying the amount of movement, direction and method of movement of a tool in an NC machine tool on a CRT prior to the movement of the machine. (processing device), 2 is a lotus. Reference numeral 3 denotes a machine program memory in which NC data, that is, machine programs (main program, subprogram) for each machining process are stored, and is connected to the CPUI via a bus 2. 4 is an NC control circuit connected to CPtJl via bus 2, which includes an interpolator 4a and an amplifier 4b.
This amplifier 4b is connected to a servo motor 5 that moves a tool post (not shown) in the X-axis direction, and a pulse generator 6 provided in this servo motor 5 is connected to the interpolator. 4a to form a servo circuit. Although not shown, such an NC control circuit and servo motor are also provided for controlling the movement of the tool rest in the X-axis direction. 7 is a CRT having a keyboard 8, and is connected to the CPUI via an I10 device 9 and a bus 2.

The above configuration is the same as a conventional general NC machine tool,
With the configuration described below, the amount, direction, and method of tool movement are visually displayed on a CRT in accordance with a program that is read from several blocks of an NC machine program prior to movement of the machine.

That is, to explain its structure, 10 is a cannibal program pre-reader that can read the contents of several blocks of programs among the programs for each machining process stored in the cannibal program memory 3 prior to the movement of the machine. In the circuit section,
This machine program prereading circuit section 10 is connected to the bus 2, and is connected to a movement amount, movement direction, and movement method calculation circuit section 11 for calculating the movement amount, movement direction, and movement method of the tool according to the read program. The movement amount, movement direction, and movement method calculation circuit section 11 calculates the movement amount of the tool obtained thereby.

The visual display is connected to the visual display signal conversion circuit section 12 for the amount of movement, the direction of movement, and the method of movement of the tool that converts the information on the moving direction and the moving method into a visual display signal, and the visual display converted by the visual display signal converting circuit section 12. signal to the I10 device 9
The configuration is such that the signal is applied to the CRT 7 via the.

Next, the tool movement display will be explained according to the configuration diagram shown in FIG. 1 and the flowchart shown in FIG. 3.

First, in step SI, it is determined whether the program check mode is set. If it is not the program check mode, the movement direction will not be displayed because continuous machining will be performed using the machine program for which the program check has been completed. Step S if program check mode
Proceed to step 2. Cannibal program look-ahead circuit section 10 shown in FIG.
The contents of several blocks of the machine program stored in the program for each machining process stored in the machine program memory 3 are read prior to the movement of the machine (step SZ), and the amount of tool movement, direction of movement, and method of movement are read. The arithmetic circuit section 11 determines the amount of movement, direction, and method of movement of the tool from the contents of the read cutting program (step S). Then, the information on the tool movement amount, movement direction, and movement method obtained as described above is converted into a visual display signal by the visual display signal conversion circuit unit 12 for the tool movement amount, movement direction, and movement method (step S4). , this visual display signal is applied to the CRT 7 via the Ilo device 9 to determine the amount of tool movement.

The moving direction and moving method are displayed on the CRT 7 (step SS). In step S6, it is determined whether or not the execution of the Canadian program has been completed for all blocks. If the execution has not been completed yet, the process returns to before step S2, and the same steps as from step S2 are executed. This program ends when all blocks are completed.

In this way, the amount of tool movement displayed on the CRT 7,
The moving direction and moving method can be displayed as a vector diagram with red arrows for fast forwarding and white arrows for cutting feed, as shown by reference numeral 13 in the display example of the CRT 7 shown in FIG.

FIG. 4 shows an example of displaying the moving direction of the tool.
(A) A workpiece W having the shape shown in the figure is being processed by moving the tool T in the direction of the arrow. (B) (I) shown in the diagram
(V) is an example of the movement direction display at that time, CRT display example 13
The right half of is the movement direction of the currently executing block, and the left half is the movement direction of the next block. In other words, (I) shows that the current tool T is moving from the right side of the screen to the left side (-Z direction), and in the next block it will move from the bottom of the screen to the top (-1-X axis direction). . If at this time (V
If a display like l) is displayed, it will be obvious at a glance that the tool T will plunge into the workpiece W side in the next block.
Program errors can be easily discovered.

Also, since (1) to (V) are in the process of cutting, they should be displayed as white arrows for cutting feed, but if they are displayed as red arrows, it is a rapid feed command and a program error. Can be distinguished.

Although vector display is used in this example, it is also possible to use other methods, such as determining a symbol to specify the direction and following that, or determining the direction by a combination of colors and displaying the color. be.

〔Effect of the invention〕

As explained above, the second invention reads the program contents of several blocks of the NC machine program before the machine moves, and determines the amount of movement, direction and method of movement of the tool in advance from the contents of the read program. The obtained tool movement amount, movement direction, and movement method information is converted into a visual display signal, and this visual display signal is applied to the CRT to display the tool movement amount, movement direction, and movement method corresponding to the program. Since the method for displaying the movement of a tool in an NC machine tool is visually displayed on a CRT, the program contents of several blocks of the NC machine tool are read prior to the movement of the machine, and this reading is performed. The amount of movement, direction and method of movement of the tool can be displayed in advance on the CRT like a vector diagram based on the contents of the program. Also, the movement method is displayed in different colors for rapid forwarding and cutting forwarding, making it easy to confirm.

Therefore, it is very convenient to be able to visually know in advance how much the tool will move in which direction and in what manner according to the machine program.Also, it is possible to check the machine program visually, so the program In addition to being able to complete the check in a short time, this has a significant effect in terms of safety, as it eliminates the possibility of overlooking any mistakes in the computer program during the check.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram for implementing this invention, Figure 2 is a C
FIG. 3 is a flowchart of the present invention, and FIG. 4 is a diagram showing an example of the display of the tool movement amount, movement direction, and movement method. 1...CPU, 2...Bus, 3...
・Canada program memory, 4-N Citi+I? al1 circuit:, 4a...
・Interpolator, 4b...Amplifier, 5...Servo motor, 6...Pulse generation! , 7...CRT
, 8... Keyboard, 9... I10 device,
DESCRIPTION OF SYMBOLS 10... Cannibal program prereading circuit unit, 11... Movement amount, movement direction and movement method calculation circuit unit, 12... Visual display signal conversion circuit unit for movement amount, movement direction and movement method, 13...・Display of tool movement amount, movement direction and movement method, T...Tool, W...Workpiece. Patent applicant Hitachi Seiki Co., Ltd.

Claims (1)

[Claims] The program contents of several blocks of the NC machining program are read before the machine moves, the tool movement information is obtained in advance from the read program contents, and the obtained tool movement information is converted into a visual display signal. , this visual display signal is applied to the CRT, and the movement information of the tool corresponding to the program is displayed on the CRT with symbols or appropriate colors.
A method for displaying tool movement in an NC machine tool, characterized in that the movement of a tool is visually displayed.