JPH0321288B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric discharge machining apparatus, and more particularly to an electric discharge machining apparatus that generates an electric discharge between a workpiece and an electrode and processes the workpiece using the discharge energy.

First, the operating principle of the electric discharge machining apparatus will be explained with reference to FIG. In FIG. 1, a workpiece 10 is placed on a table 16 in a machining tank 14 in which an insulating liquid 12 (hereinafter referred to as machining liquid) is stored. This table 16 is driven in the X-axis direction by an X-axis feed screw shaft 18 and a drive motor 20 for the shaft, and in the Y-axis direction by a Y-axis feed screw shaft 22 and a drive motor 24 for the shaft. . The electrode 26 faces the workpiece 10 with the machining fluid 12 interposed therebetween, and is driven in the Z-axis direction, that is, in the vertical direction in the drawing, by a Z-axis feed screw shaft 28 and a drive motor 30 for the shaft.

The machining fluid 12 is returned from the machining tank 14 to the tank 34 via the pipe 32 and stored therein, and is also supplied to the workpiece 10 from the nozzle 40 via the pipe 36 and the pump 38.
and between the electrode 26 and the machining tank 14.
and circulates through the tank 34. Relative movement between the workpiece 10 and the electrode 26 is performed by moving the table 16 on which the workpiece 10 is placed in the X-axis and Y-axis directions, and moving the electrode 26 in the Z-axis direction, that is, in the vertical direction. . With this configuration, the workpiece 10
The relative movement between the electrode 26 and the electrode 26 becomes a three-dimensional movement.

The processing power supply 42 that supplies electrical energy between the workpiece 10 and the electrode 26 is, for example, a DC power supply E,
It is composed of a switching element Tr, a capacitor C, a charging resistor R, and a switching element control circuit SC. The control device 44 controls the driving of the X, Y, and Z axis drive motors 20, 24, and 30, and uses an NC device, a copying device, or a computer.

Figure 2 shows the switching element in Figure 1.
This is a pulse train output by turning on and off a Tr, and consists of the elements of current peak value Ip, pulse width τp, and pulse pause width τr.

FIG. 3 shows an electrical condition setting section 46 provided in a conventional electrical discharge machining apparatus. This electrical condition setting section 46 includes a polarity (multi, +, -) changeover switch 4
6a, SF circuit on/off switch 46b, SH circuit on/off switch 46c, processing setting (Ip) switch 46d, processing setting fine adjustment (ΔIp) switch 46e, pulse width (τp) switch 46f, rest time (τr) switch 46g, discharge Time (TDQU) switch 46h, machining time (TDQD)
It consists of various rotary switches such as switch 46i, and processing conditions are selected by operating these switches. The output of this selected machining condition is
Electrical energy is transmitted to the processing power source 42 shown in the figure, and electrical energy is applied between the workpiece 10 and the electrode 26 based on the selected processing conditions from this processing power source, and processing is performed according to the desired electrical conditions. There is.

However, in the conventional electrical discharge machining equipment configured as described above, when machining a certain workpiece, the previous machining electrical conditions are memorized in a notebook, etc., and the machining conditions are recorded each time the workpiece is changed. It was very inconvenient to have to set electrical conditions that suited the workpiece.

The present invention was made in view of the above-mentioned conventional problems, and its purpose is to easily and quickly determine the electrical conditions corresponding to the workpiece, improve processing efficiency, and improve processing efficiency.
The purpose is to provide an electric discharge machining device with high machining accuracy.

In order to achieve this object, the present invention provides an electrical discharge machining apparatus equipped with a CRT display device, which includes: The CRT display device includes an electrical condition display section that displays the above-mentioned electrical conditions during machining, a switch that selects the desired one from the plurality of electrical condition types displayed on the electrical condition display section, and a processing electrical condition setting section having a setting switch for setting a set value of electrical conditions;
a control device that is added to the electric discharge machining device and has a storage means for storing a plurality of types of electrical condition packages;
A means for reading and displaying a plurality of electrical condition packages on a CRT screen display section of a CRT display device;
The present invention is characterized by comprising means for selecting one of the plurality of electrical condition packages displayed on the screen display section, and means for changing data in the electrical condition package displayed on the CRT screen display section.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

The present invention provides electrical condition setting section 48, CRT 50
(Divided into an electrical condition display section 52a, a machine state display section 52b that displays the operating state of the electrical discharge machining apparatus, such as whether or not it is in process of machining, automatic machining mode or manual machining mode, etc.), and a CRT screen display section 52c. )
In an electric discharge machining apparatus equipped with a CRT display device 54, as shown in FIG. As shown, electrical condition packages 64a to 64f stored on memory cards 58, 60, and 62, which are storage means in the control device 44, are read out and displayed on the CRT screen display section 52c, and the electrical conditions are arbitrarily changed. It has been made possible.

Here, the electrical condition package is a package of the pulse width τp, current peak value Ip, pulse pause width τr, etc., which were individually set as described above in conventional electrical discharge machining equipment. If necessary, other processing conditions may be included therein, such as the period of regular electrode vertical movement, whether or not high voltage is applied, whether adaptive control is on or off, etc.
Further, the CRT screen display section 52c and the keyboard section 66 for setting the electrical condition package are arranged adjacent to each other for ease of operation, as shown in FIG.

The embodiment of the present invention has such a configuration, and its operation will be explained below. Shown in Figure 6
The electrical condition package 64 is selected from the memory cards 58 to 62 in the control device 44 by the selection switch 92 of the electrical condition setting section 48 of the CRT display device 54.
A to 64f are displayed in several packages on the CRT screen display section 52c, as shown in FIG.

Here, by displaying a plurality of electrical condition packages on the CRT screen display section 52c, it is made easy to select the electrical condition package to be used for processing from among them.

Packages that are not displayed are sequentially displayed on the CRT screen display section 52c by pressing the "NEXT" and "BACK" keys in the keyboard section 66 on the CRT display device 54. Furthermore, the electrical conditions displayed on the CRT screen display section 52c can be changed as desired by the user.

That is, as shown in FIG. 7, a plurality of electrical condition packages 64a to 64a are displayed on the CRT screen display section 52c.
64f is displayed, first select the electrical condition package that has the data you want to change, and then type one of the numbers <01> to <09> on the upper row of the CRT screen display section 52c on the keyboard section 66.
key, and set it in NO94, which is the electrical condition package NO setting item. Next, select the electrical condition having the data you want to change from the set electrical condition package, and
The number <1> corresponding to the electrical condition attached to the left end of
- <13> is entered using the keys on the keyboard section 66, and NO96, which is the electrical condition NO setting item, is entered.
Set to . Then, the user inputs the data of the set electrical conditions using the keys on the keyboard section 66, and sets the changed content in the setting item No. 98. Thereafter, by pressing the "INPUT" key on the keyboard section 66, the contents of the data of the set electrical conditions of the set electrical condition package can be changed.

Note that the switches 68 to 9 of the electrical condition setting section 48
2 has the following functions. In other words, switch 6
The electrical conditions of the setting sections 100 to 130 of the electrical condition display section 52a are selected by the switches 8 to 82 and the up/down switching switch 90. For example, by pressing the switch 76, the pulse width setting section (τp)
116 and a pulse width fine adjustment setting section (Δτp) 118 are selected, and either one is selected by the up/down changeover switch 90. In this way, electrical conditions such as pulse width (τp), rest width (τr), current peak width (Ip), etc. are selected by selection of the setting units 110 to 130. Also, switch 8
Reference numeral 4 denotes an electrical condition setting section call switch, and this switch displays the electrical conditions during machining on the electrical condition display section 52a. The switches 86 and 88 are
This is a switch for setting each setting value of each setting section 100 to 130, and is used to set data of electrical conditions. The switch 90 is a switch for switching the setting sections 100 to 130 up and down. Switch 92 is
It is a selection switch for the CRT screen display section 52c,
This switch causes the electrical condition packages 64a to 64f in the memory to be displayed on the CRT screen display section 52c.

Here, specific operational aspects from determining electrical conditions to processing will be explained. First, the electrical condition packages 64a to 64f stored on the memory cards 58, 60, and 62 of the control device 44 are
It is read out and displayed on the CRT screen display section 52c. The displayed electrical condition packages 64a to 64f
The data contents of the electrical conditions can be changed using keys on the keyboard section 66 as necessary. When a machining command is executed during machining, the electrical condition package selected from the electrical condition packages is displayed on the electrical condition display section 52a and output to the power source 42. This electrical condition display section 5
The electrical condition displayed in 2a is the electrical condition setting section 4.
It is corrected as necessary by the switch No. 8. The power supply 42 supplies electrical energy between the workpiece 10 and the electrode 26 based on the set electrical condition data, and processes the workpiece 10.

As described above, according to the present invention, in an electric discharge machining apparatus equipped with a CRT display device, the electrical condition package stored in the control device is selectively read out and displayed on the CRT screen display section of the CRT display device. Since a desired electrical condition package can be selected from among a plurality of types of electrical condition packages, the electrical conditions can be set all at once, and the electrical conditions can be set easily and quickly. Therefore, unlike in the past, it is possible to easily identify the workpiece and the machining process without having to write down the machining conditions for each workpiece in a notebook or look up the correspondence table given by the manufacturer depending on the type of workpiece. Electrical conditions package
As long as the NO is known, the machining conditions can be determined immediately, resulting in superior reliability and machining efficiency compared to conventional methods, and the ability to obtain highly accurate processed products.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of an electric discharge machining device, FIG. 2 is a diagram of a pulse train applied between a workpiece and an electrode, and FIG. 3 is a front view of a machining condition setting section in a conventional electric discharge machining device. Figure 4 is a front view of the CRT display device connected to the control device, Figure 5 is a schematic diagram of the CRT display device and the electrical condition package inside the control device, and Figure 6 is an explanation of the electrical condition setting section of the CRT display device. 7 are state diagrams of the CRT display unit when the electrical condition package screen is selected. In each figure, the same members are given the same symbols, 10 is the workpiece, 12 is the machining fluid, 14 is the machining tank, 16 is the table, 26 is the electrode, 42 is the machining power supply, 44 is the control device, and 54 is the CRT. Display device, 58, 60, 6
2 is a memory card, and 64a to 64f are electrical condition packages.

Claims (1)

[Scope of Claims] 1. An electric discharge machining apparatus equipped with a CRT display device, comprising: a CRT screen display section that displays a plurality of electrical condition packages provided in the CRT display device and in which a large number of electrical conditions are combined; an electrical condition display section for displaying the electrical conditions during machining; a switch for selecting a desired one from the plurality of electrical condition types displayed on the electrical condition display section; a machining electrical condition setting section having a setting switch for setting setting values of conditions; a control device added to the electric discharge machining apparatus and having a storage means for storing a plurality of types of electrical condition packages; and a CRT screen of the CRT display device. means for reading and displaying a plurality of electrical condition packages on a display section; means for selecting one of the plurality of electrical condition packages displayed on the CRT screen display section; and an electrical condition package displayed on the CRT screen display section. An electric discharge machining apparatus characterized by comprising: means for changing data in the electric discharge machining apparatus.