JPS62297026A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To make it possible to compensate a deviation amount while visually watching the condition of machining by arranging a drive motor control mechanism which executes a machining program entered in advance in parallel at compensated movement positions by adding and outputting axis movement amounts by manual operation. CONSTITUTION:A drive motor control mechanism 46 adds and outputs axis movement amounts instructed by manual operations to X, Y, Z and C axis motors 24, 26, 28 and 30 to execute a machining program 43 at compensated movement positions in parallel along program loci. Namely, manual operation box data and handling data are entered via an interface 40 in a manual output discrimination process 41 to discriminate axis movements demanded by an operator's operation. Here, in the case axis movement demands are discriminated, a manual output process 42 is executed and commands for the axis movement demands are outputted to the X, Y, Z and C axis drive motors 24, 26, 28 and 30. Thus, deviation amounts can be compensated while visually watching the machining condition and it is made possible to simplify the operation and to shorten work time.

Description

[Detailed Description of the Invention] & Detailed Description of the Invention [Field of Industrial Application] The present invention relates to position control in an electric discharge machining apparatus.

[Conventional technology]

FIG. 5 is a schematic configuration diagram showing a conventional electric discharge machining apparatus.

In the figure, the vehicle is a workpiece immersed in an insulating machining liquid α stored in a machining tank (121), and this workpiece is opposed to an electrode α6 via a machining liquid α gradient. are doing. Machining fluid α4 is used in the machining tank (W external tank head and machining + a +
The machining fluid α→ is circulated between the machining tank (12) and the tank (I) and stored therein. Processed product +10
) and the electrode α6). Due to the relative movement between the workpiece αO and the electrode Q6), the table (A) on which the workpiece (101 is placed) is
The electrode α6) can be moved in the plane including the table (2) using the 1-axis drive motor (2), or the electrode α6) can be moved vertically using the 2-axis 1-drive motor (E), or the electrode α6) can be moved using the C-axis drive motor 130). This is done by rotating it to an arbitrary angle. - is a processing power source that supplies electrical energy between the electrode (16) and the workpiece (10), and is composed of, for example, a DC power source S1, a switching element T1, a capacitor C1, a charging resistor R1, and a switching element control circuit. There is. MH each X, Y, Z, C axis drive motor tq, @
).

128 It is a numerical control device such as an NC (numerical side N) that performs automatic control of the drive of + and -, a copying device, or an electronic machine.

FIG. 4 is a diagram showing the waveform of a pulse train output from the machining power source in the electrical discharge machining apparatus shown in FIG. , τp is the pulse width, and τ is the pulse pause width.

The program for performing electrical discharge machining on the workpiece in the electrical discharge machining apparatus configured as above is generally N
This is done by inputting a 9NC program created in C code into a numerical controller and executing the %NC program. An example of the NC program is shown below.

ooxloooyloooooo ■X10xm, Y1
Positioning to 0s+mO position M2S ■ Filling of machining fluid α→ M80
■Input (into the machining fluid) M84 ■Machining power supply - 〇 input Gzz - 1000002 Axis - Machining up to 1011 G26H200R200Q500 ■M2S expanded by 500 μm in a circular shape in the XY direction ■Turning off the machining power supply - Also, the electrode α6 used in actual machining ) are generally prepared in plural, and are used for rough machining, finishing machining, etc. depending on the electrical conditions of the machining power source.

[Problem that the invention seeks to solve]

Since the conventional electrical discharge machining apparatus is configured as described above, when converting it to a finishing electrode after rough machining and performing finishing machining, the attachment of the electrode α6) f? Due to a positioning error due to one-time or actual alignment with the machined hole, the electrode α6) may come into partial contact with the workpiece αe during finishing machining, for example, during enlargement machining at (■) in the NC program example. In order to eliminate this uneven contact, the machining must be temporarily interrupted and the machining position must be corrected again by the operator, and in some cases, it may be necessary to partially change the NC program. There were problems such as complicated operations and reduced processing efficiency.

This invention has been made to solve the above-mentioned problems, and provides an electric discharge machining device that can be manually moved to any position while checking the machining state while machining the workpiece. The purpose is to

[Means for solving problems]

Electric discharge machining device according to this invention! rix, y, z, c axis,
For the output to the drive motor, specify the command movement ii using the manual operation box or handwheel used during manual operation.
, Y, Z, and C axis drive motors.

[Effect]

The electrical discharge machining apparatus according to the present invention includes manual operation x,
The addition output to the y, z, and c axis drive motors can change the machining position t by an arbitrary distance with respect to the NC program locus during machining.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing the control contents in the electrical discharge machining device.
Give the block's worth of commands to the output processing (command execution) ← phrase. Output processing () outputs the given commands to the X, Y, Z, and C axis drive motors.

piece, μs), ■). Control of the machine by the Kani Program Tai is carried out by command decoding processing and output processing. In the manual output determination process 141), manual operation box data and handle data are taken in via the input interface f4Q', and an axis movement request caused by an operator's operation is determined. If an axis movement request is determined here, manual output processing (hand output processing) is executed, and commands for the axis movement request are sent to the X, Y, Z, and C axis drive motors, (7), μs1. !
Output to BO).

Figure 2 shows the t-pole α6) and the workpiece (lI:
This is a diagram showing the positional relationship of (l), and particularly shows the swing machining that enlarges the machining side of the workpiece. The electrode α6) rotates on the circumference inside the broken line, and in figure (a), the rotation center position of the electrode α6) and the center position of the machined hole in the workpiece are in the X-axis direction! This is the case where there is a shift by the friend distance. In this case, the machining state is such that during the oscillating rotation, half the circumference is machined, but the remaining half circumference is not machined, which is generally called a one-sided contact state. Ma7'2:,
(t)) The figure shows the rotation center position of electrode α6) and the workpiece (t
This shows a case where the center positions of the machined holes in cn coincide, and in this case, the machining state is such that electric discharge machining is performed uniformly throughout the oscillating rotation.

Generally, the discharge condition can be confirmed by the operator by observing the appearance of sparks due to the discharge, and the operator manually performs the above steps while observing the appearance of sparks. move the distance.

〔Effect of the invention〕

As explained above, according to the present invention, since the drive shaft control machine is equipped with a drive shaft control machine that performs processing at the same level as the execution of the machine program, the machining state can be adjusted without interrupting machining in response to a machining position shift of the workpiece. It is possible to correct the deviation while visually observing it, which has the effect of simplifying the operation and significantly shortening the working time.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing control details in an electrical discharge machining apparatus according to an embodiment of the present invention, and FIG. 2(a). (b) is a diagram showing the positional relationship between an electrode and a workpiece, FIG. 3 is a configuration diagram of a conventional electric discharge machining apparatus, and FIG. 4 is a waveform diagram of a pulse train output from a machining power source. - Workpiece α6)... Between electrodes, ■, (to)), ■)... X, Y, Z, C axis drive motors... Input interface field)... Manual output discrimination processing... Manual output processing 1431+1・Canada program-
...Command decoding processing (a)...Output processing Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] Electrical discharge processes the workpiece into a desired shape by commanding the relative movement between the workpiece and the electrode using a numerical control device, and generating discharge development using electrical energy supplied between the workpiece and the electrode. An electric discharge machining device characterized in that the machining device is equipped with a drive shaft control mechanism that performs processing at the same level and in parallel with the execution of a machining program.