JPH0661656B2 - Wire cut electrical discharge machine - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an improvement of a wire-cut electric discharge machining apparatus capable of simultaneously machining a plurality of workpieces with the same shape by a single wire electrode. is there.

[Prior art]

FIG. 1 shows that the applicant has filed Japanese Patent Application No. 59-106 before the application of the present invention.
It is a perspective view of the wire cut electric discharge machining apparatus applied as No. 493. In the figure, (1) is an electrode wire feeding device, (2) is an electrode wire fed from the ball feeding device (1), (3)
Is a drive unit for moving the upper guide (3) in the X-axis and Y-axis directions.
(6) is the work piece, (7) is the mounted work piece (6) X-Y
Movable table to move in the axial direction, (8) and (9) are movable tables
A drive device for moving (7), (10) is a lower guide for guiding the electrode wire (2) passing through the workpiece (6), and (11) is an electrode wire recovery device for recovering the electrode wire (2). . Reference numeral (20) is a mounting plate on which a plurality of upper guides (3), (3a) are mounted. Reference numeral (21) is a pulley for reversing the feeding direction of the electrode wire (2). The lower guide (10),
A plurality of (10a) are also provided like the upper guides (3) and (3a), and the electrode wire collecting device (11) collects the electrode wire (2a) whose feed direction is reversed by the pulley (21). Unlike the conventional device, it is provided on the same side as the electrode wire feeding device (1) with respect to the workpiece (6).

In the wire cut electric discharge machine configured as described above, the electrode wire (2) fed from the electrode wire feeder (1) is guided by the upper guide (3) attached to the attachment plate (20). , Vertically passes through the work (6) and is guided by the lower guide (10) to reach the lower side, the feeding direction is reversed by the pulley (21), and is vertically guided by the lower guide (10a). Pass through the work piece (6a) from the back side and
It is guided to a) and is recovered by the electrode wire recovery device (11).

The cutting process by electric discharge is performed by applying a voltage between the electrode wires (2) and (2a) and the workpieces (6) and (6a) to discharge the electric wire.
Since (2) and (2a) use a single one, they are cut by the same discharge energy in real time.

Further, in order to make the cutting shape into a desired shape, the mounting plate (20) and the movable table (7) are respectively driven by the driving devices (4), (5), (8)
The electrode wire (2), which is controlled by (9) and moved (not shown),
Plural workpieces by making (2a) and the workpieces (6), (6a) perform exactly the same relative movement on the XY axes.
(6) and (6a) can be cut into the same desired shape at the same time.

Fig. 2 shows a pulley (21) with a plurality of small diameter pulleys (22), (22a)
It shows another embodiment when it is changed to
By setting the distance between (22) and (22a) in correspondence with the distance between the cutting start positions of the plurality of workpieces (6) and (6a), the electrode wires (2) and (2a) are covered. The optimum positional relationship can be made perpendicular to the workpieces (6) and (6a).

Since the conventional wire-cut electric discharge machining device is configured as described above, when a plurality of workpieces (6) are cut into the same shape and simultaneously, as shown in FIG. 1 and FIG. The wire (2) is fed from above to the work piece (6) from below, while it is fed from below to the work piece (6a). Normally, the cutting waste during cutting is discharged from the top to the bottom in the processing part of the work piece, so in the work piece (6), the feeding direction of the electrode wire (2) is the discharge direction of the work piece. Since they match, the discharge effect of machining waste is good, and there is no secondary discharge (that is, an abnormal phenomenon in which the electrode wire discharges through the machining waste to the workpiece) for stable machining. And the processing accuracy is good. However, in the workpiece (6a), since the electrode wire (2a) is fed from the bottom to the top, the discharging direction of the machining waste and the feeding direction of the electrode wire (2a) are opposite to each other, so that the machining waste is May be lifted up by the electrode wire (2a), which becomes an obstacle to the discharge of machining waste. Further, there are drawbacks that secondary discharge is likely to occur in the processed portion, the electrode wire is broken, and the processing accuracy is poor.

[Outline of Invention]

The present invention has been made with the object of remedying such drawbacks, and it is possible to invert a single electrode wire through a pulley so that a plurality of workpieces can be fed from the same direction (for example, from top to bottom). The present invention provides a wire-cut electric discharge machine according to claim 1.

Example of Invention

FIG. 3 is a perspective view showing an embodiment of the present invention. In the figure, (1) to (21) are the same as the conventional device. (Four
a) (5a) is a drive device that moves the upper guide (3a) in the X-axis and Y-axis directions, and (21a) and (23) are pulleys, and the pulley (2
This is for reversing the feeding direction of the electrode wire (2) similar to 1). (24) is an escape hole for the electrode wire (2a) provided in the movable table (7).

In the wire-cut electric discharge machining device configured as described above, the electrode wire (2) fed from the electrode wire feeding device (1) is guided by the upper guide (3) and is vertically processed.
It passes through (6) and is guided by the lower guide (10) to reach the lower side, the feeding direction is reversed by the pulley (21), passes through the relief hole (24) of the movable table (7) and reaches the upper side, The feed direction is reversed by the pulley (23) and the other upper guide (3
The other work piece (6a) is vertically guided by a).
It passes through in the same direction as (6), is guided by the lower guide (10a), and reaches downward again. The feeding direction of the electrode wire (2) is again reversed by the pulley (21a), and the electrode wire passes through the outside of the movable table upward and is collected by the electrode wire collecting device (11).

The cutting process by electric discharge is performed by applying a voltage between the electrode wires (2) and (2a) and the workpieces (6) and (6a) to discharge the electric wire.
Since (2) and (2a) use a single one, they are cut by the same discharge energy in real time.

Also, to make the cutting shape the desired shape, the upper guide (3),
(3a) and movable table (7) are respectively driven
Controlled by (4), (4a), (5) (5a), (8), and (9) (not shown), the electrode wires (2), (2a) and the work piece (6) are moved. ，
By causing (6a) to perform exactly the same relative motion on the XY axes, it is possible to simultaneously cut a plurality of workpieces (6), (6a) into a desired identical shape.

If the driving devices (4) and (5) of the upper guide (3) and the driving devices (4a) and (5a) of the upper guide (3a) are individually driven, a plurality of workpieces are simultaneously and differently. Can be cut into shapes.

In addition, since the electrode wires (2) and (2a) are fed to the workpieces (6) and (6a) in the same direction from the upper side to the lower side, the discharge effect of the machining waste at the time of cutting is effective. Both are good, and since there is no secondary discharge due to machining waste, stable machining is always possible and machining accuracy is good.

FIG. 4 shows a pulley (21) having a plurality of small diameter pulleys (25), (25a).
(26), (26a), (27), it shows another embodiment when changing to (27a), the distance between the pulleys (25), (27) is a plurality of workpieces (6. ), (6a) is set according to the distance between the cutting start positions so that the electrode wires (2), (2a) are placed at optimum positions perpendicular to the workpieces (6), (6a). Can be in a relationship.

In the above embodiment, the number of workpieces (6) and (6a) is two, but three or more workpieces (21), (25), (25a),
(26), (26a), (27), (27a) are provided in front of and behind the workpieces (6), (6a) and the electrode wire recovery device (11) is installed at the optimum position for easy machining. can do.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, according to the present invention, a plurality of workpieces can be cut into a desired shape in real time with a single electrode wire, and the same shape can be cut including taper processing. Since the wires are configured to be fed in the same direction (from the top to the bottom in the present invention), the discharge effect of the processing chips during the cutting process is good, and there is no secondary discharge due to the processing chips, so the electrode wires are disconnected. Without doing so, there is an effect that stable processing is always possible and processing accuracy is good.

Further, according to the present invention, a plurality of workpieces can be cut into different shapes in real time, and the wire electrode can be easily set at the optimum cutting start position of the plurality of workpieces.

[Brief description of drawings]

FIG. 1 is a block diagram showing a conventional wire-cut electric discharge machine, FIG. 2 is a block diagram showing another example of the conventional device, and FIG. 3 is a block diagram showing one embodiment of the present invention. FIG. 6 is a configuration diagram showing another embodiment of the present invention. In the figure, (1) is an electrode wire feeder, (2) and (2a) are electrode wires, (3) and (3a) are upper guides, (4), (4a),
(5) and (5a) are drive units, (6) and (6a) are workpieces, (7)
Is a movable table, (8) and (9) are drive devices, (10) and (10a) are lower guides, (20) is a mounting plate, (21) is a pulley, (22) and (22).
a) is a pulley, (24) is a relief hole, (25), (25a), (26), (26
a), (27), and (27a) are pulleys. In the drawings, the same reference numerals denote the same or corresponding parts.

Claims (3)

[Claims] 1. A wire-cut electric discharge machine for cutting a workpiece with an electrode wire by electric discharge energy,
An electrode wire feeder for feeding an electrode wire, and a first for inverting the electrode wire fed from the electrode wire feeder
, A second pulley for reversing the electrode wire reversed by the first pulley again, a third pulley for reversing the electrode wire reversed by the second pulley, and a processed electrode An electrode wire recovery device for recovering the wire, a part of the electrode wire facing the first pulley, and a second part
The upper guide and the lower guide that respectively guide the inverted parts by the pulleys in the up and down position, the movable table that is placed between the upper guide and the lower guide to place a plurality of workpieces, and the upper guide. A drive unit that moves in the X-axis and Y-axis directions in conjunction with each other, and the movable table for the X-axis and Y-axis.
A wire cut electric discharge machine comprising a driving device that moves in the axial direction. 2. A wire cut electric discharge machine for cutting a work piece with an electrode wire by electric discharge energy,
An electrode wire feeder for feeding an electrode wire, and a first for inverting the electrode wire fed from the electrode wire feeder
, A second pulley for reversing the electrode wire reversed by the first pulley again, a third pulley for reversing the electrode wire reversed by the second pulley, and a processed electrode An electrode wire recovery device for recovering the wire, a first upper guide and a first lower guide for respectively guiding the part of the electrode wire facing the first pulley in a vertical position, and a second pulley of the electrode wire for reversing The second upper guide and the second upper guide that respectively guide the raised portions in the vertical position.
Lower guide, a movable table disposed between the first and second upper guides and the first and second lower guides for mounting a plurality of workpieces, and the first upper guide A first drive device for moving in the X-axis and Y-axis directions, a second drive device for moving the second upper guides in the X-axis and Y-axis directions in conjunction with each other, and the movable table for the X-axis, Y-axis. A wire cut electric discharge machine comprising a driving device that moves in the axial direction. 3. A wire cut electric discharge machine for cutting a work piece with an electrode wire by electric discharge energy,
An electrode wire feeder for feeding an electrode wire, and a first for inverting the electrode wire fed from the electrode wire feeder
, A second pulley for reversing the electrode wire reversed by the first pulley again, a third pulley for reversing the electrode wire reversed by the second pulley, and a processed electrode An electrode wire recovery device for recovering the wire, a part of the electrode wire facing the first pulley, and a second part
The upper guide and the lower guide that respectively guide the inverted parts by the pulleys in the up and down position, the movable table that is placed between the upper guide and the lower guide to place a plurality of workpieces, and the upper guide. A drive unit that moves in the X-axis and Y-axis directions in conjunction with each other, and the movable table for the X-axis and Y-axis.
A wire-cut electric discharge machine, comprising: a drive device that moves in an axial direction, wherein each of the first to third pulleys is composed of a plurality of pulleys.