JPH0520210B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a jig for external setup of an electric discharge machine.

(Background Art) FIG. 3 is a perspective view showing an internal setup jig of a conventional electrical discharge machine. As shown in the figure, conventionally, the workpiece 6 to be electrically discharged is directly attached to the magnetic table 7 in the electrical discharge machine, so the time required to set up the workpiece 6 to be electrically discharged is reduced. However, there was a problem that the operating time of the electric discharge machine was shortened. As is well known, the machining time of electric discharge machines is quite long, so shortening the operating time is a big problem.

In addition, in the case of the conventional internal setup jig, a reference plate 8 for positioning is arranged on the edge of the magnetic table 7, and after a plurality of workpieces 6 to be electrically discharged are set in series, the magnetic switch is turned on. Operate 9,
Previously, all the workpieces 6 to be electrically discharged were fixed to the magnetic table 7 at the same time, but with this method, dimensional errors in the workpieces 6 to be electrically discharged were accumulated in the connection direction, and the electrical discharge machining part A~
There was a problem in that the machining position accuracy of the electrical discharge machining parts P to R was lower than that of D. Because of these problems, setting the workpiece 6 to be subjected to electrical discharge machining requires an extremely high degree of skill, and in practice only a skilled engineer can set it up. For this reason, for example, when operating for a long time at night, once all the workpieces 6 to be electrically discharged machined on the magnetic table 7 have been machined, an unskilled worker must again start the next workpiece 6 to be electrically discharged machined. There was a problem in that it was difficult to set up and restart electrical discharge machining.

Therefore, while setting the workpiece to be electrically discharged on the movable plate outside the electrical discharge machine,
It is possible to increase the effective operating time of the electric discharge machine by positioning and fixing this movable plate to the fixed plate of the electric discharge machine. However, until now, no positioning mechanism suitable for such uses has been proposed. For example, JP-A-61-
Cross-shaped V as disclosed in Publication No. 76218
By fitting the groove and the cross-shaped convex groove,
However, if this conventional example is applied to the positioning of the above-mentioned movable plate and fixed plate, the V groove and the convex groove will come into contact as a surface, so electric discharge machining is performed on this contact surface. There was a problem that there was a high possibility that debris would get caught, and that high positioning accuracy could not necessarily be obtained. In this conventional example, in order to always obtain high positioning accuracy, it is necessary to completely remove oil and electrical discharge machining debris remaining on the contact surface between the V groove and the convex groove, which requires a lot of effort. As a result, a long time is spent exchanging the workpieces, and there is a problem that the use of external setup jigs becomes meaningless.

(Object of the Invention) The present invention has been made in view of the above-mentioned points, and its purpose is to remove the movable plate on which the processed work is set from the fixed plate and set the unprocessed work. An electric discharge machine which enables quick and highly accurate positioning with simple work when attaching another set movable plate to the fixed plate, thereby increasing the effective operating time of the electric discharge machine. The purpose of the present invention is to provide a setup jig.

(Disclosure of the Invention) As shown in FIGS. 1 and 2, the jig for external setup of an electric discharge machine according to the present invention has a cross-shaped structure consisting of upward vertical grooves 1 and horizontal grooves 1'. a lower fixing plate 10 having upward V-grooves 1, 1' on its upper surface; and a pair of round bars such as pin gauges arranged in a cross shape in the upward V-grooves 1, 1'. 3 and
Downward V-grooves 2, 2', which are arranged in a cross shape and are composed of downward vertical grooves 2 and lateral grooves 2', are arranged through the round bars 3 to face the upward V-grooves 1, 1'. The lower fixed plate 10 is provided with an upper movable plate 20 having a mounting jig 4 for the electrical discharge machined workpiece 6 on the lower surface thereof, and one or more sets of holding tools 5 on the lower fixed plate 10. , upper movable plate 20
It is designed to hold down with a predetermined pressure.

Since the present invention is configured in this way, the upper movable plate 2 is installed in advance outside the electrical discharge machine.
For example, as shown in FIG. 2, using the mounting jig 4 provided on the top surface of the
When the electric discharge machine has finished electric discharge machining of all the workpieces set inside, the upper movable plate 20 inside the machine on which the machined workpiece 6 is placed is moved to the unmachined electric discharge machine. It is sufficient to replace the workpiece 6 with the set upper movable plate 20 and restart the electrical discharge machining immediately. In this way, the effective operating time of the electrical discharge machine can be extended.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of an external setup jig for an electrical discharge machine according to an embodiment of the present invention. The lower fixing plate 10 has an upward V-groove 1 on its upper surface.
1' is provided in a cross shape with upwardly directed vertical grooves 1 and lateral grooves 1', and is clamped in the oil tank of the electrical discharge machine. The round bar material 3 is made of highly accurate pin gauges with the same dimensions, one pair each in length and width. 1' is fixed with an embedded bolt,
A portion exceeding the radius of the round bar 3 protrudes from the upper surface of the upward V-groove 1, 1'. A plurality of upper movable plates 20 made of magnetic tables are prepared. Each upper movable plate 20 has a vertical groove opposite to the upward V-groove 1, 1' consisting of an upward vertical groove 1 and a horizontal groove 1' of the lower fixed plate 10.
A block having downward V-grooves 2, 2' consisting of a pair of horizontally facing vertical grooves 2 and lateral grooves 2' having the same dimensions is fixed with high accuracy, and thereby the upper movable plate 20 Settings can now be made repeatedly and with high precision. On the upper movable plate 20, a special mounting jig 4 is fixed with a magnetic table, which allows the workpiece 6 to be electrically discharged to be mounted with high precision. The workpiece 6 to be subjected to electrical discharge machining can be set in advance. FIG. 2 shows, as an example, a state in which a workpiece 6 to be electrically discharged is machined is attached to a mounting jig 4. As shown in FIG. To set the electrical discharge machined workpiece 6 on the mounting jig 4, place the end face of the electrical discharge machined workpiece 6 on the positioning plate 41 arranged at right angles on the mounting jig 4, and then turn the magnetic switch 4.
3 on and the corresponding magnetic block 42
A method is adopted in which the workpiece 6 to be electrically discharged and machined on the magnetic block 42 is fixed by applying force to the magnetic block 42. Therefore, in this embodiment, there is no cumulative error that occurs when a plurality of workpieces 6 to be electrically discharged are connected, and the accuracy of electrical discharge machining can be improved. Furthermore, it is possible to improve workpiece positioning accuracy by simplifying the setting work.

Upper movable plate 20 and lower fixed plate 10
The fixation is performed by one or more sets of pressers 5. This presser 5 is rotatably attached to the lower fixing plate 10 by a pivot shaft 53.
A book rotating arm 51 and a ratchet-type knob 52 attached to the rotating end of the rotating arm 51
It is composed of. Ratchet type knob 5
The upper movable plate 20 rotates idly when a certain load is applied to the upper movable plate 20.
is fixed to the lower fixing plate 10 with a predetermined low pressure so as to prevent lifting occurring during electrical discharge machining and maintain accuracy.

(Effects of the Invention) As described above, in the present invention, the upper movable plate having the mounting jig for the workpiece to be electrically discharged is
Using an upward V-groove and a downward V-groove arranged in a cross shape, each consisting of an upward and downward vertical groove and a horizontal groove, and a round bar placed between them, high accuracy is repeatedly applied to the lower fixing plate. This makes it possible to set up the workpiece to be electrically discharged machined externally.Therefore, when the electrical discharge machine finishes electrical discharge machining of all the workpieces set inside, the machined workpiece can be placed on the electrical discharge machine. By replacing the internal upper movable plate with the upper movable plate that has previously set the unmachined electrical discharge machined work outside the electrical discharge machine, electrical discharge machining can be restarted immediately, reducing the effective operating time of the electrical discharge machine. This has the effect that the length can be increased. In addition, the lower fixed plate has one or more sets of pressers that press the upper movable plate with a predetermined pressure, so it is possible to prevent the upper movable plate from lifting up due to machining force or vibration generated during electrical discharge machining. This also has the effect of stably maintaining high accuracy.

In addition, if an electric discharge machine equipped with an automatic workpiece changer (APC) is adopted and the upper movable plate is automatically replaced, the upper movable plate with multiple workpieces to be discharged machined can be replaced. It becomes possible to perform continuous processing of multiple pieces, and it becomes possible to significantly extend the continuous machining time of the electric discharge machine.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG.
The figure is a perspective view of a conventional example. 1 is an upward vertical groove, 1' is an upward horizontal groove, 1,
1' is an upward V-groove, 2 is a downward vertical groove, 2' is a downward horizontal groove, 2, 2' are downward V-grooves, 3 is a round bar, 4 is a mounting jig, 5 is a presser, 6 1 is a workpiece to be electrically discharged, 10 is a lower fixed plate, and 20 is an upper movable plate.

Claims (1)

[Claims] 1. A lower fixing plate having, on its upper surface, an upward V-groove arranged in a cross shape consisting of an upward vertical groove and a horizontal groove, and a pair each arranged in the upward vertical groove and the horizontal groove of the upward V-groove, respectively. a round bar material, and a downward V-groove arranged in a cross shape consisting of a downward vertical groove and a horizontal groove on the lower surface so as to face the upward V-groove through each of the round bar materials, and the upper surface and an upper movable plate having a mounting jig for a workpiece to be electrically discharged, and one or more sets of holding tools attached to the lower fixed plate to press the upper movable plate with a predetermined pressure. Features: Jig for external setup of electric discharge machine.