JPS5969218A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To improve machining efficiency and accuracy when a work is machined, by storing a machining electric condition in packages and promptly indexing the electric condition for the work. CONSTITUTION:A cathode-ray (CRT) display device 54 is connected to an electric discharge machining device 44 through a signal transmission cable 56, and electric conditions are stored in electric condition packages 64a-64f on plural memory cards 58-62 in said device 44 by the key of a keyboard part 66 of an electric condition setter part, and then the electric condition is read to be displayed on a CRT picture display part 52c by selecting the package with a switch. Accordingly, the electric condition can be promptly indexed, and machining efficiency and accuracy can be improved.

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 made of an insulating liquid 12 (
It is placed on a table 16 in a machining tank 14 in which a machining fluid (hereinafter referred to as machining fluid) is stored.

This table 16 is moved in the X-axis direction by an X-transport screw shaft 18 and its drive motor 20, and in the Y11 direction by a Y-transport II screw shaft 22 and its drive motor 24.
1] direction. The electrode 26 faces the workpiece 10 with the machining fluid 12 interposed therebetween, and the Z transport screw shaft 28
The shaft is driven in the vertical direction in the X-axis direction by the drive motor 30 of the shaft.

The machining liquid 12 is returned from the machining tank 14 to the tank 34 via the pipe 32 and stored, and is also injected from the nozzle 40 via the pipe 36 and the pump 38 toward the gap between the workpiece 10 and the electrode 26, It circulates between the processing tank 14 and the tank 34. The 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 by moving the electrode 26 in two axial directions, that is, in the vertical direction. . With this configuration, the relative movement between the workpiece 10 and the electrode 26 becomes a three-dimensional movement.

The processing power source 42 that supplies electrical energy between the workpiece 10 and the electrode 26 is configured by, for example, a DC power source E1, a switching element Tr, a capacitor C1, a charging resistor R, and the switching element control circuit SC.

The control device 44 is the X/Y-Z axis drive motor 20/24.
・It controls the drive etc. of 30, and an NC device, copying device, or computer is used.

Figure 2 shows the current heating signal output by turning on and off switching element 'rr in Figure 1.
value I p N /'rus width τ2, nosolus pause width τ1
It consists of the elements of

FIG. 3 shows an electrical condition setting section 46 provided in a conventional electrical discharge machining apparatus. This electrical condition setting section 46 includes polarity (multi, polarity, -) changeover switch 46a1 SF circuit cut-off switch 46bS SH circuit cut-off switch 46C1
ΔIp) Switch 4601 No. 9 Lux Width (F) Switch 4
6 for 1 rest time (τr) switch 46g 1 discharge time (T
DOU) switch 46h1 Machining time (TDOD) switch 461 and other rotary switches are operated to select machining conditions, and the output of the selected machining conditions is transmitted to the machining power supply 42 shown in FIG. Machining is performed according to desired electrical conditions given between the workpiece 10 and the electrode 26 from a power source.

However, in conventional electric 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 applicable electrical conditions are checked every time the workpiece is changed. It was very inconvenient because we had to set electrical conditions that matched the workpiece.

The invention was made in view of the conventional problems mentioned above, and the purpose is to create an electric discharge machining device that can easily and quickly determine the electrical conditions corresponding to the workpiece, and has high machining efficiency and machining accuracy. The purpose is to provide

In order to achieve the above object, the present invention is an electric discharge machining apparatus equipped with a CRT display device, in which a large number of electric conditions are stored in a control device added to the electric discharge machining apparatus, and the electric discharge machining apparatus is equipped with a CRT display device. C of the CRT display device
It is characterized by being configured so that it can be read and displayed on the RT screen and the data in the storage can be changed.

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

The present invention relates to an electric discharge machining apparatus equipped with a CRT display device 54 consisting of an electrical condition setting section 48, a CRT 50 (distinguished into an electrical condition display section 52a, a machine status display section 52b, and a CRT screen display section 52c), as shown in FIG. As shown in FIG. 5, the CRT display device 54 is connected to the control device 44 of the electrical discharge machining device via the signal transmission cable 56, and the information is stored on the memory card 58, 60, 62 in the control device, as shown in FIG. A certain electrical condition package 64a to 64f is read out and displayed on the CRT screen display section 52c, and the electrical conditions can be arbitrarily changed by operating various switches in the electrical condition setting section 48.

Here, the electrical condition package refers to the pulse width τ9, current peak value Ip, and no! that were individually set one by one as described above in conventional electrical discharge machining equipment. Ruth pause width τr
If necessary, include other processing conditions, such as the period of periodic electrode vertical movement, whether or not high voltage is applied, adaptive control, cutting, etc. You can leave it there.

Furthermore, the CRT screen display section 52c and the keypad section 66 for setting the electric condition A are adjacent to each other as shown in FIG. 5 for ease of operation.

The embodiment of the present invention has the above configuration, and its operation will be explained below. When the electrical condition settings to be displayed on the CRT screen display section 52c are selected by the various switches 68 to 92 of the electrical condition setting section 48 of the CRT display device 54 shown in FIG. Several stain condition packages 64a to 64f are displayed on the CRT screen display section 52c as shown in FIG.

In addition, the seven keys that are not displayed are "NEXTJ, r" in the keyboard section 66 on the CRT display device 54.
The screen display section 52 is displayed in sequence by pressing the BAcKJ key.
displayed on C. Furthermore, the electrical conditions displayed on the CRT screen display section 52c can be changed arbitrarily by the user.In other words, as shown in FIG.
96 for each electrical condition and set the data 98 you want to change on the screen using the 1 key, and press [■NP
The contents of the electrical condition package can be changed using the U T J keys.

The switches 68 to 92 of the electrical condition setting section 48 have the following functions. That is, the switches 68 to 82 include a power supply circuit selection section (TP, 5H1sF, Gu) 1oo, an electrical condition selection section 102, a polarity selection section (multi, +, -) 104, an SH circuit data setting section 106, and a processing section. Setting (Ip) setting section 108, TDO, ON, O
FF setting section 110, adjustment setting section (ΔIp
) 112, gap adjustment (F) 114, nof pulse width setting part (Ip) 116, /4 pulse width fine adjustment setting part (Δτp) 1
18, rest time setting unit (Tr) 120, rest time fine adjustment setting unit (Δτr) 122, discharge time setting unit (TDQU) 1
24, optimizer setting section 126, processing time setting section (
TDQD) 128, booster processing setting setting section (T
PB) Select 130 respectively. Further, switch 84 is a switch for calling the electrical condition setting section, switches 86 and 88 are switches for setting each set value of each of the above-mentioned setting sections 100 to 130, 90 is a switch for switching up and down of each of the above-mentioned setting sections 100 to 130, and switch 92 is This is a selection switch for the CRT screen display section 52c.

In the above embodiment, the case of electric discharge machining equipment and electrical conditions was explained, but the present invention can be applied to numerical settings of various automatic control devices, such as wire-cut electrical discharge machining equipment or other devices having memory. A similar effect can be achieved when applied to machines.

As described above, according to the present invention, in an electrical 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. , the relationship between the workpiece and the machining electrical conditions can be easily determined without having to write down the machining conditions for each workpiece in a notebook or by checking the correspondence table provided by the manufacturer depending on the type of workpiece, as in the past. As long as the machine number and the cage number are known, the machining conditions can be determined immediately, which results in superior reliability and machining efficiency compared to conventional methods, and has the effect of producing 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 P pulse train that is applied between the workpiece and the electrode, and Fig. 3 is a diagram of the machining condition setting section in a conventional electric discharge machining device. 4 is a front view of the CRT display device connected to the control device, FIG. 5 is a schematic diagram of the electrical conditions inside the CRT display device and the control device, and FIG. 6 is a schematic diagram of the electrical conditions of the CRT display device. FIG. 7, which is an explanatory diagram of the condition setting section, is a state diagram of the CRT display section when the electrical condition four cage screen is selected. each! The same reference numerals are given to the intermediate members, 10 is the workpiece,
12 is a machining liquid, 14 is a machining tank, 16 is a table, 26 is an electrode, 42 is a machining power source, 44 is a control device, and 54 is a CRT
Display device, 58.60.62 is memory card, G4a
~64f electrical condition package. Agent Patent Attorney Shin Kuzuno - (1 other person) L J Figure 2 Figure 3 Figure 6 Commissioner of the Japan Patent Office 1, Indication of case: Japanese Patent Application No. 57-176551 2, Title of invention: Electrical discharge machining device 3, Relationship with the person making the amendment Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 4, Agent address Marunouchi, Chiyoda-ku, Tokyo 2-2-3-5, detailed description of the invention of the specification subject to amendment, and drawings. that's all

Claims (1)

[Claims] (In an electrical discharge machining device equipped with an IIC'RT display device, a large number of electrical condition packages are stored in a control device added to the electrical discharge machining device, and these electrical condition packages are read out on the CRT screen of the CRT display device. An electric discharge machining device characterized in that it is configured to display and change data in the corresponding section.