JPH074701B2 - Electric discharge machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric discharge machine, and more particularly to an apparatus for ejecting a machining liquid.

[Prior Art] FIGS. 3 to 5 are views showing a conventional electric discharge machining apparatus. FIG. 3 is a vertical sectional view, FIG. 4 is a plan view, and FIG. 5 is a front view of a machining fluid ejector. It is a figure.

In the figure, (1) is a machining tank, (2) is a workpiece placed in the machining tank (1), (2a) is the machining powder, and (3) is electrical discharge machining of the workpiece (2). Electrodes, (4) is the working fluid supplied into the working tank (1),
(5) is a machining fluid supply block that supplies the machining fluid (4) provided in the machining tank (1), and (7) is a plurality of couplers (6A) fixed to the machining fluid supply block (5). A machining fluid ejector detachably attached to any of (6E), having ejection holes (7a) to (7e) for ejecting the machining fluid (4). (8) is a machining fluid supply pump that supplies the machining fluid (4) to the machining fluid supply block (5), (9) is a valve that adjusts the hydraulic pressure of the machining fluid (4) supplied, and (10) is the machining A partition plate is provided upright in the tank (1) for setting the height of the working liquid, and (11) is a drain pipe for discharging the working liquid (4).

The conventional electric discharge machining device is configured as described above, and the machining fluid (4) supplied by the machining fluid supply pump (8) is a valve.
It is supplied to the machining fluid supply block (5) at the hydraulic pressure set by (9), and is passed through the machining fluid ejector (7) from one selected from the couplers (6A) to (6E), and its ejection hole ( 7a) ~ (7e)
Supplied into the processing tank (1). The supplied working liquid (4) flows in the direction of arrow A, and the working powder (12) generated by the electric discharge machining of the electrode (3) and the workpiece (2) is washed away and guided to the drain pipe (11).

At this time, the flow of the working fluid changes depending on the height of the partition plate (11) and the positions of the couplers (6A) to (6E) used,
These heights and positions are always adjusted optimally. Specifically, the height of the partition plate (11) is set so that the machining liquid surface is above the upper surface of the workpiece (50 mm or more), and the couplers (6A) to (6E) are exposed to the machining fluid. A coupler is selected and used in a position where it can flow above the work piece.
Thus, the height of the partition plate (11) and the couplers (6A) to (6E)
By adjusting the position of, the optimum flow of the machining liquid that can effectively discharge the machining powder discharged above the workpiece from the processing tank is obtained.

[Problems to be Solved by the Invention] In the conventional electric discharge machining apparatus as described above, the flow of the machining fluid depends on the height of the partition plate (11) and the couplers (6A) to (6E) used.
The position of couplers (6A) to (6B) must be changed according to the height of the partition plate (10) in order to obtain the optimum flow of the machining fluid, so that the operator can automate it. There is a problem that it causes trouble.

The present invention has been made to solve the above problems, and provides an electric discharge machining apparatus capable of maintaining the height of a jet hole at a constant position with respect to a machining liquid surface and facilitating automation. The purpose is to

[Means for solving problems]

The electric discharge machining apparatus according to the present invention has a machining liquid level height setting dam plate for setting the liquid level height of the machining liquid, and a machining liquid jetting hole for jetting the machining liquid in a substantially horizontal and layered manner. A working fluid supply device is provided which is fixed and is configured so as to work in conjunction with this dam plate so as to always maintain the position of the working fluid ejection hole at a fixed position from the working fluid surface.

[Action]

In this invention, the working fluid supply device is interlocked with the weir plate,
Hold at a fixed position from the surface of the working fluid.

Example of Invention

1 and 2 are views showing an embodiment of the present invention.
The figure is a vertical sectional view, and Fig. 2 is a plan view, showing (1) to (4), (7), (7
a), (7e), (8) to (11) are the same as those of the conventional device.

In the figure, (14) is a dam plate for setting the liquid level of the machining liquid (4), and (15) is a machining liquid supply device attached to the dam plate (14).

In the electric discharge machining apparatus configured as described above, similarly to the conventional apparatus, the machining fluid (4) supplied by the machining fluid supply pump (8) is the machining fluid supply block (5) and the machining fluid ejector ( It is supplied from the ejection holes (7a) to (7e) into the processing tank (1) via the (7). Then, the working liquid supply device (15) fixed to the dam plate (14) for setting the working liquid level is interlocked to raise and lower the working liquid supply device (15), and the ejection holes (7a) to (7d). ) Processing fluid
(4) Hold in a fixed position from the surface. As a result, the adjustment work by the operator is automated and can greatly contribute to the unmanned operation.

〔The invention's effect〕

As described above, according to the present invention, the working liquid level height setting dam plate for setting the liquid level of the working liquid, and the working liquid jet holes for spraying the working liquid in a substantially horizontal and layered manner are fixed to the dam plate. Since the working fluid supply device configured to hold the position of the working fluid jetting hole at a constant position from the working fluid surface is provided in conjunction with the dam plate, If it is adjusted to the upper surface of the work piece at a predetermined height, the working fluid ejection holes will also move automatically in accordance with the working fluid surface, and the working fluid will flow above the work piece at a predetermined height. Therefore, it becomes possible to automatically obtain the optimum flow that can effectively discharge the processing powder discharged above the workpiece from the processing tank.

[Brief description of drawings]

1 and 2 are views showing an embodiment of an electric discharge machining apparatus according to the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view of FIG. 1, and FIGS. FIG. 3 is a view showing a conventional electric discharge machining apparatus, FIG. 3 is a longitudinal sectional view, FIG. 4 is a plan view, and FIG. 5 is a front view of a machining fluid ejector. In the figure, (1) is a processing tank, (2) is a workpiece, (3) is an electrode, (4) is a working fluid, (7a) to (7e) are ejection holes, (14) is a weir plate, 15) is a working fluid supply device. The same reference numerals in the drawings denote the same parts.

Claims (1)

[Claims] 1. A workpiece immersed in a machining fluid in a machining tank is subjected to electric discharge machining by an electrode, and the machining fluid is ejected from ejection holes of a machining fluid ejecting tool provided in the machining tank. Which has a working liquid level setting dam plate for setting the liquid level of the working liquid and a working liquid jet hole for spraying the working liquid in a substantially horizontal and layered manner, and is fixed to the dam plate. An electric discharge machining apparatus comprising: a machining liquid supply device configured to always maintain the position of the machining liquid ejection hole at a constant position from the machining liquid surface in conjunction with a plate.