JPH0360610B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric discharge machine, and in particular to an electric discharge machine that uses an NC control device with a CRT display device for control to control the electric discharge generated between a workpiece and an electrode and the workpiece. The present invention relates to an electric discharge machine that performs electric discharge machining on a workpiece by controlling the position of electrodes, etc., and displays the machining status.

The machining state described here is, for example, discharge efficiency = electric power used for machining / electric power supplied from the machining power source x 100 (%).

Contamination: The amount of machining powder that exists between the electrode and the workpiece during electrical discharge machining.

Servo voltage: Voltage between the electrode and the workpiece where a discharge phenomenon occurs for machining.

Machining mode: Electrode servo method commanded by the NC control device.

This term refers to the condition that appears between the electrode and the workpiece during machining, which can be determined by

Conventionally, as a machining status display device in this type of electrical discharge machine, a display device using a seven segment display as shown in Fig. 1 or a light emitting diode (hereinafter referred to as LED) as shown in Fig. 3 has been arranged. A display device is known that displays data as the number of light emitting points of LEDs.

The operation of this type of conventional device will be explained below. In a display device using the seven segment display 10 shown in FIG. 1, the display changeover switch 12 shown in FIG.
By displaying the desired data using
The necessary data was obtained numerically. The display device shown in Fig. 1 not only displays the machining status but also the position (distance from the machine origin, movement position from the NC command,
It is extremely economical and multifunctional because it can display information such as command value (remaining distance), parameter display (instructions for controlling how to issue NC commands, instructions for operating additional functions, etc.) using a single display device. However, it cannot display a large amount of data at once. In addition, machining conditions change rapidly, and a large amount of data must often be viewed and judged at once, resulting in unavoidable drawbacks.

On the other hand, in the display device of FIG. 3, it is possible to display up to several types of printed processing status items 14 using the LED 16 in accordance with rapidly changing data. However, the display device shown in FIG. 3 requires the use of large hardware in order to view a large amount of data at once, which is disadvantageous in terms of cost. Also, since it is an LED display, it is difficult to know the exact numerical value with the desired accuracy. Furthermore, a common drawback of the display devices shown in FIGS. 1 and 3 is that whenever the processing system changes, the hardware must be rebuilt to match the change, resulting in a lack of adaptability to system changes. be.

For this reason, as shown in FIG. 4, some machines display several types of machining status items on the CRT display device 18. Specifically, in FIG.
a, a bar graph display 20b of the machining state, and a numerical display 20c of the machining state. These displays show numerical values indicating the machining status,
Central processing unit (CPU) that drives the CRT display device
22 and software 24 (a control program stored in the memory), it is configured to be converted into numerical characters and bar graphs and displayed, and a wide variety of machining status data can be displayed as long as the screen allows. The display of this display device can be changed in any way by changing the software.

The NC control device is provided with a machining state reading interface circuit 32 for reading various machining states during electrical discharge machining.

However, in such conventional devices, in order to change the display on the display device, it is necessary to constantly change the software, and the software has to be rewritten each time to match the change, which is also a problem due to changes in the system. There was a problem with adaptability to the

The present invention was made in view of the conventional problems described above, and its purpose is to display the machining status all at once at high speed using a CRT display device attached to an NC control device, and to adapt to changes in the system. It is an object of the present invention to provide an electric discharge machine that improves performance, reduces hardware cost to almost zero, and allows an operator to quickly recognize the machining state.

In order to achieve the above-mentioned object, the present invention provides an electrical discharge machine that performs various machining controls using an NC control device with a machining status display device and performs electrical discharge machining of a workpiece. a device, a machining state reading interface circuit for reading various machining states during electrical discharge machining;
a display screen switching switch for switching between multiple CRT display screens based on a screen selection display made on the CRT screen to select a CRT display screen;
A switch reading interface circuit for reading the data on the CRT display screen selected by this switch, and a CRT display device to perform a display corresponding to the switch based on the data selected by the switch read by this circuit. Receiving signals from a memory having a control program and a machining status reading interface circuit, the CRT display device displays a predetermined machining status using numerical values and graphs based on the memory's control program.
It is characterized by including a CPU.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings. FIG. 5 is a very schematic configuration diagram of an electric discharge machine having a machining state display device of the present invention.

In this embodiment, a dedicated display screen switching switch 26 is added to the NC control device to form a comprehensive display device. That is, a switch reading interface circuit 28 is provided to read the data of the CRT display screen selected by the display screen switching switch 26, and the switch 26 read by the switch reading interface circuit 28 is provided.
By providing a memory 24 having a control program that causes the CRT display device 18 to display a display corresponding to the switch 26 based on the data selected by the processing state reading interface circuit 3.
The central processing unit 22 receives the signal from 2, takes in the screen switching request information, and displays the corresponding screen by executing the control program stored in the memory 24. etc., can be selected arbitrarily by the user in addition to displaying the machining status.

A screen selection display 30 is displayed on the display section 20 of the CRT display device 18, which is a screen display that can be selected by switching the display screen switching switch 26. Each screen selection display 30 is displayed in correspondence with the display screen switching switch 26. Further, the NC control device is provided with a machining state reading interface circuit 32 for reading various machining states during electrical discharge machining.

In the embodiment shown in FIG. 5, a specific example of display on a CRT display device is shown in FIG.

FIG. 6a shows an example of a display when F1 of the display screen switching switch 26 is selected and the machining state of the screen selection display 30 is selected. Also, the 6th
FIG. b shows a display example when F2 of the display screen switching switch 26 is selected and the position display of the screen selection display 30 is selected.

With such a configuration, the switch 2 can be selected from the screen selection display 30 displayed in correspondence with the display screen switching switch 26 according to the content of the display.
6 can be selected appropriately to perform a desired display. Therefore, the configuration of what is displayed can be quickly changed in accordance with advances in electrical discharge machining technology.

As described above, according to the present invention, the state of electrical discharge machining can be displayed using numerical values and graphs using a CRT display device attached to an NC control device for controlling an electrical discharge machine, thereby providing a lot of information necessary for the operator. The screen is designed to be displayed as easily as possible at once, and can be switched to multiple other types of screens at will, allowing the operator to quickly and accurately recognize the machining status at a glance. Summer. Also,
Since it uses a CRT display device attached to the NC device, hardware costs can be reduced to zero, and it is possible to quickly and inexpensively respond to changes in processing machines, improving adaptability to changes in the system. Effects such as this can be obtained.

[Brief explanation of drawings]

Figure 1 is a front view of a conventional machining status display device using seven segments, Figure 2 is a front view of a display changeover switch, Figure 3 is a front view of a conventional machining status display unit using LEDs, and Figure 4 is a front view of a machining status display device using conventional LEDs. The figure is a schematic diagram of an electric discharge machine having a machining status display device using a conventional CRT display device, and FIG. 5 is a schematic front view of an electric discharge machine having a machining status display device using a CRT display device of the present invention. , FIGS. 6a and 6b are diagrams showing a specific example of display on a CRT display device in the embodiment shown in FIG. 5. In each figure, the same members are given the same symbols, and 18 is
CRT display device, 20 is a display unit, 22 is a central processing unit, 24 is a memory, 26 is a switch for changing the display screen, 28 is an interface circuit for reading the switch, 30 is a screen selection display, 32 is an interface for reading machining status. It is a face circuit.

Claims (1)

[Claims] 1. In an electrical discharge machine that performs various machining controls and performs electrical discharge machining of a workpiece using an NC control device with a machining state display device, the machining state display device includes a CRT display device 18; Machining state reading interface circuit 32 for reading various machining states during electrical discharge machining
and a display screen switching switch 26 for switching between multiple CRT display screens based on the screen selection display 30 made on the CRT screen to select a CRT display screen; A switch reading interface circuit 28 for reading data, and a switch 2 based on the data selected by the switch 26 read by this circuit 28.
a memory 24 having a control program for causing the CRT display device 18 to display a display corresponding to 6;
and a CPU that receives a signal from the processing state reading interface circuit 32 and causes the CRT display device 18 to display a predetermined processing state using numerical values and graphs based on the control program in the memory 24.
22; An electric discharge machine comprising: