JPH03178734A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To allow an electric discharge machine to sufficiently exhibit its abilities regardless of electrode size by disposing an electrode exchanging device main body in which plural electrodes each mounted to a clamping device are stored, and which moves and is positioned in X and Y directions relative to the clamping device and which are freely attached or removed. CONSTITUTION:To machine a large-size electrode 15 or a large-size subject 6 to be machined, a clamp screw 23 attached to a positioning clamp jig 22 is loosened. Then the sealing contact of a positioning clamp jig 21 with the positioning clamp jig 22 is released so that a little space is formed between the jigs. An electrode exchanging device main body 12 is thus drawn out in the direction of the Y-axis. As a result, the electrode exchanging device and the large-size electrode 15 or subject 6 to be machined are prevented from interfering with each other, thereby removing restriction on the size of the machinable electrode 15 or the subject 6 to be machined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] This invention relates to electrical discharge machining equipment, and more particularly to an automatic electrode exchange device.

[Conventional technology J] Conventionally, machining fluid is interposed between an electrode and a workpiece facing each other, and a machining voltage higher than the dielectric breakdown voltage is applied between the electrode and the workpiece to generate an electric discharge between the electrodes. Electrical discharge machining equipment is known that generates electric discharge energy and performs machining using this electric discharge energy.

This electrical discharge machining device is equipped with an automatic electrode exchange device. FIG. 2 shows a conventional electrical discharge machining device.

In the figure, (1) is a main shaft to which a clamp device (2) is attached directly below, which is supported by a head (3) and can move in the Z-axis direction. (4) is a processing tank installed on the table (5) to store processing fluid (not shown).

(6) is the workpiece mounted on the table (5) 6 (7) is the X that moves the table (5) in the X-axis direction
It is a shaft motor and is mounted on the saddle (8).

(9) is a Y-axis motor that moves the saddle (8) in the Y-axis direction, and tlO) is a column that supports the head (3).

+ill is a bed that is the base of the electrical discharge machining device.

(12) is the main body of the automatic electrode exchange device attached to the upper side of the processing tank (4), and is equipped with a magazine section (13) that can be moved in the X-axis direction by a drive source. (141 is an electrode (
15) is attached to the magazine section C13.
) is removably held.

Next, the operation will be explained.

The operation for exchanging the electrode (15) housed in the magazine section (13) according to instructions from a numerical control device (not shown) is as follows.

First, the main shaft (1) rises to the Z-axis origin position (not shown) and stops. Next, the processing tank (4) moves to the specified exchange position
Move in the axial and Y-axis directions. And the magazine section (
13) slides in the X-axis direction by compressed air (not shown) as a driving source and stops.

Next, the clamping device (2) attached to the main shaft (11) is unclamped by compressed air (arrow), descends to a predetermined position, and then clamps the holder (14) to which the electric fi (15) is attached. Thereafter, the magazine section (13) returns to its original position by compressed air (not shown) as a driving source, and the table (5) and main shaft (11) Based on this, the workpiece (6) is moved to a predetermined position and processed.

Next, the operation of returning the electrode to the magazine section (13) attached to the clamp device (2) will be explained.

When a numerical control device (not shown) commands to return the electrode (15) to the magazine section (13), the main shaft (1) rises and stops at a predetermined position. Next, the table (5) is moved to the exchange position by the X-axis motor (7) and Y-axis motor (9) and then stopped. Next, the main shaft (1) descends to the replacement position in the X-axis direction and stops.

Then, the magazine part (13) is driven by compressed air (
(not shown) in the X-axis direction, and the holder (14)
Stops at the position where it is caught. Next, the clamp device (2
) is unclamped by compressed air (not shown), and the main shaft (11 rises again and stops at a predetermined position.
) is returned to its original position by compressed air (not shown), which is a driving source, and the replacement of the electrode (15) is completed.

[Is invention the solution? Problems to be Missed] The conventional electric discharge machining apparatus as described above has the following problems. In other words, as shown in Fig. 3, the conventional electrical discharge machining device has a replaceable electrode (1
When performing electric discharge machining using 5), the range within the dotted line in the figure can be machined.

Since the magazine section (113) is housed in the electrode exchange device, there is no interference between the electrode f151 and the magazine section (13).

However, large electrodes (15
) is attached to a clamp device for machining, as shown in Figure 4, the electrode (15), the magazine section (13), and even the workpiece (6) will interfere, making it unusable and reducing the machining capacity of the electrical discharge machining device itself. However, the electrode (15) could not be attached even if the electrode (15) was used, and the dimensions of the electrode that could be used were severely restricted.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an electric discharge machining apparatus that can fully demonstrate its capabilities without being limited by electrode dimensions.

[Means to solve the problem]

The electric discharge machining apparatus according to the present invention interposes a machining fluid between an electrode and a workpiece facing each other, applies a machining voltage between the electrode and the workpiece, and generates an electric discharge between the two. A main body of an electrical discharge machining apparatus that processes a workpiece using electrical discharge energy, and the IT1. A clamp device that is attached to the electrical processing device main body and attaches the electrode, and a plurality of electrodes that are attached to the clamp device are housed, move in the X and Y directions with respect to the clamp device, and move in the X, Y, and Z directions. The main body of the electrode exchange device is positioned at the main body of the electrode exchange device and is detachable.

[Function] The electric discharge machining apparatus according to the present invention has a removable electrode exchanger body, so that it is possible to use a large electrode of 5 dimensions,
Large-sized workpieces can be loaded.

Embodiment 1 of the Invention FIG. 1 is a diagram showing the overall configuration of an embodiment of the invention.

In the figure, the same reference numerals as in FIG. 2 have the same structure and the same function. Main shaft (1), head (3),
Processing tank (4), table f51, X-axis motor (7)
, saddle +81, Y-axis motor (9) column (1
0) and the like constitute the electrical discharge machining apparatus main body (1G). (21) is attached to the electrode exchange device body (12) 6
The opened positioning clamp jig A, (Z2) is placed in the processing tank (
4) is the positioning clamp jig 3 attached to the left f and ll upper surfaces. (23) is the positioning clamp jig gB (2
2) is a plurality of clamp screws attached.

Next, this effect will be explained. Normally, when using an electrode exchange device, the electrode exchange device main body (12) is a positioning clamp jig A f21) and a positioning clamp jig B (
22) is attached to the left upper surface of the processing tank (4). On the other hand, when machining electrodes with large dimensions (process 5) or workpieces > (6), 1 positioning clamp jig B (221
Loosen the clamp screw (23) attached to the Then, the close contact between the positioning clamp jig A (21) and the positioning clamp jig B (221) is released, creating a slight gap (not shown) between the jigs.
The electrode exchange device main body (12) can be pulled out in the Y-axis direction. As a result, interference between the electrode exchange device and the large-sized electrode (15) and workpiece (6) can be prevented, and there is no limit to the dimensions Tl1i of the electrode (15) and workpiece (6) that can be machined. be able to.

In addition, when using the electrode exchange device again, positioning clamp jig 1A (21) and positioning clamp jig B
t22) has a positioning part in the X, Y, and X axis directions, so by tightening the clamp screw (23) again, the position of the electrode exchanger main body (12) and processing tank (4) can be removed. It can be restored to the same state as before, and there is no problem in single pole replacement operation.

It goes without saying that the air supply wiring cable (not shown) and air piping (not shown) attached to the electrode exchanger main body (12) are also easily attached and detached.

〔Effect of the invention〕

As described above, according to the present invention, the electrode exchange device attached to the upper layer of the processing tank side can be easily removed, and even if it cannot be installed, the positioning error at the time of restoration can be kept within a range where there is almost no problem. The electrode exchange device does not only have small-sized electrodes that can be used, but also large-sized electrodes and additives that interfered and were impossible to use in the 2nd Song Dynasty device.]
Electrical discharge machining equipment with a wide range of applications, such as the ability to use two objects (
I can have one child.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an electric discharge machining apparatus according to an embodiment of the present invention, and FIGS. 2 to 4 relate to conventional electric discharge machining apparatus.
FIG. 2 is an overall configuration diagram of the electric discharge machining apparatus, FIG. 3 is a diagram showing a machining range in the case of a replaceable electrode, and FIG. 4 is a diagram showing interference between the electrode exchanger main body and the electrode. In the figure, (1) is the ball shaft, (2) is the clamp device, (
3) is the head, (4) is the processing tank, (5) is the table, (
6) is the workpiece, (7) is the X-axis motor, (8) is the saddle, (9) is the Y-axis motor, (10) is the column, (11) is the bed, (12) is the electrode exchange device body, (13) is a magazine part, (14) is a holder, (15) is an electrode, (16)
) is the electrical discharge machining equipment main body, (211 is positioning clamp jig A, (22) is positioning clamp jig B, (23)
is a clamp screw. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] A machining liquid is interposed between the electrode and the workpiece, and a machining voltage is applied between the electrode and the workpiece to generate an electric discharge between the electrodes, and the workpiece is machined by this discharge energy. A main body of an electric discharge machining apparatus to perform electrical discharge machining, a clamp device attached to the main body of the electric discharge machining apparatus to attach the electrode, and a plurality of electrodes attached to the clamp device are housed, and the electric discharge machining device moves in the X and Y directions with respect to the clamp device. , and X, Y,
An electrical discharge machining device comprising an electrode exchange device main body that is positioned in the Z direction and is detachable.