JP2595573B2 - Wire electric discharge machining method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining method for easily machining a shape left behind when machining a large number of shapes using a wire electric discharge machine. .

[Prior Art] FIG. 2 is a diagram showing, for example, a conventional electric discharge machining apparatus, in which (12) is a workpiece, (10) is a movable table for mounting and fixing the workpiece (12), (16) and (20) are sliding parts, (14) and (18) are servomotors that move the sliding parts (16) and (20), and (22) is a numerical control that gives signals to the servomotors (14) and (18). Equipment, (24) Wire electrode for processing, (30) (32) Wire guide supporting wire electrode (24), (26) Wire bobbin around which wire electrode (24) is wound, (36) Wire electrode A tension roller for winding (24), (38) a wire winding roller for collecting the used wire electrode (24), (28) and (34) are wire electrodes (24) and a workpiece ( (40) is a power supply for supplying voltage, and (42) is a power supply for supplying voltage between Power supply, (44) a switching transistor for turning on and off the DC power supply to form a pulse waveform, (50) a control unit for controlling the switching transistor (44), (48) a limiting resistor, (46) Is a condenser for charging, (52) is a working fluid device, (56) is a working fluid tank that stores working fluid, (58) is a filter that filters working fluid, (60) is a pump that pumps working fluid, ( 62) is a nozzle for supplying a working fluid to the workpiece, (54) is a working fluid serving as a discharge medium between the workpiece (12) and the wire electrode (24), and (70) is a working fluid. This is an automatic wire electrode supply device capable of connecting and cutting the wire electrode (24).

 Next, the operation will be described.

The workpiece (12) is fixed to a movable table (10), and the movable table is moved by a servomotor (18).
The position is controlled by the numerical controller (22) in the axial direction and in the X-axis direction by the servomotor (14).

In addition, the wire electrode (24) is supplied with a pulse of a DC power supply (42) by a switching transistor (44) in a processing power supply section (40) and a charging capacitor (46) via a power supply section (28) (34). A voltage V is applied.

On the other hand, the working fluid (54) filtered by the filter (58) in the working fluid supply device is pumped out by the pump (60), and is discharged between the workpiece (12) and the wire electrode (24). Supplied as As a result, a discharge is generated between the wire electrode (24) and the workpiece (12), and the heat can process the shape as controlled by the numerical controller (22).

When processing a plurality of shapes on one workpiece (12) using the wire electrode automatic supply device (70), for example, as shown in FIG. 3, the wire electrodes are placed in the respective initial holes H1 to H10. By automatically connecting and processing, continuous unmanned processing can be performed.

If the wire electrode (24) breaks during one shape processing, it automatically returns to the initial hole, traces the program after connecting the wire electrode (24), and breaks the wire electrode (24). Processing can be resumed from the position.

The program at this time is performed, for example, as shown in FIG.

In the figure, “G22L100” is a command to read and execute the program with label number 100, “G00X10” is a command to move + 10.0mm in the X-axis direction, and “M20” is for connecting the wire electrodes to the automatic wire electrode supply device. "M80" is a machining fluid, "M82" is a wire, "M84" is a command to turn on machining, "G01" is a command to move at F specified by X and Y, "M21" Is a command for causing the wire electrode automatic supply device to cut the wire electrode.

If the numerical control device (22) determines that continuation of the shape processing is impossible due to frequent disconnection of the wire electrode in one shape processing, for example, numerical control of data as shown in FIG. The wire electrode (24) is cut by the wire electrode automatic supply device (70), moved to the next initial hole, and subjected to the next shape processing. FIG. 5 is a data display of the uncut shape, showing that the machining was interrupted and skipped at the initial holes 2, 4, 7, and 8 after the end of the continuous machining in FIG.

[Problems to be Solved by the Invention] Since the conventional wire electric discharge machining method is performed as described above, if a continuous machining shape skip occurs in a large number of shapes, the remaining shape is machined. Therefore, move the table from the initial hole H1 to H2 in FIG.
There was a problem that the work efficiency of rework was poor, such as manually proceeding with the NC program to the initial hole number H2.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a wire electric discharge machining method capable of improving the work efficiency of rework.

[Means for Solving the Problems] The wire electric discharge machining method according to the present invention is characterized in that, when a plurality of shape machining operations are continuously performed, among the plurality of shape machining operations, if the shape machining operation can be continued, the method is performed. In the wire electric discharge machining method for performing the shape processing, performing the next shape processing by skipping the shape processing in the case of the shape processing in which the processing cannot be continued, and reprocessing the skipped shape after the end of the continuous processing. In the case of the shape processing in which the processing cannot be continued, the shape processing is skipped and the data related to the shape processing is stored. When the skipped shape is reworked, the data related to the stored skip shape processing is stored. The wire electrode and the table so that the wire electrode moves directly from the end point of the continuous machining to the first initial hole having the skipped shape. Are moved relative to each other, and a program is automatically set to start machining from the first initial hole.

Further, in the wire electric discharge machining method according to another invention of the present invention, when performing a plurality of shape machining continuously, among the plurality of shape machining, if the shape machining can be continued, the shape machining is performed. At the same time, if the shape cannot be processed, skip the shape processing and perform the next shape processing.
In the wire electric discharge machining method of reworking the skipped shape after the end of the continuous machining, in the case of the shape machining in which the machining cannot be continued, the shape machining is skipped and the data relating to the shape machining is stored, At the time of reworking the skipped shape, using the stored data relating to the skipped shape processing, a second initial corresponding to the shape requiring the next rework from the processing end point of the shape requiring the wire electrode to be reworked The wire electrode and the table are relatively moved so as to move directly to the hole, and a program is automatically set so as to perform processing from the second initial hole.

[Function] According to the wire electric discharge machining method of the present invention, when reworking a skipped shape, the wire electrode is used to store the skipped shape from the continuous machining end point using the stored data on the skipped shape machining. The wire electrode and the table are relatively moved so as to move directly to the first initial hole, and a program for automatically starting the processing from the first initial hole is used by using data relating to skip shape processing in which a program is automatically stored. The wire electrode was returned from the processing end point of the reworked shape to the initial hole related to the shape requiring the next rework, and the program was automatically set to start the processing therefrom.
Alternatively, at the time of reworking the skipped shape, using the data relating to the stored skipped shape processing, the wire electrode is used for the second shape related to the shape requiring the next rework from the processing end point of the shape requiring the previous rework. Since the wire electrode and the table are relatively moved so as to move directly to the initial hole, and the program is automatically set to perform processing from the second initial hole, the efficiency is high.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, the same reference numerals as those in FIG. 3 showing the conventional example denote the same parts, and a description thereof will be omitted.

In FIG. 1, (PE) is the processing end point, (P2) is the point where the initial hole (H2) is stored, (P4) is the point where the initial hole (H4) is stored, and (P7) is the initial hole (H7). (P8) is the point where the initial hall (H8) is stored.

 Also, (100) is the first movement trajectory, (101) is the second movement trajectory, (102) is the third movement trajectory, and (103) is the fourth movement trajectory.

 Next, the operation will be described.

If the shape skip as shown in Fig. 5 occurs after the shape processing as shown in Fig. 3 has been completed using the NC program as shown in Fig. 4, select "Rework" in the NC numerical controller. By doing so, the table is fed and reworking is performed as shown in FIG.

In FIG. 1, from the processing end point (PE) to the initial hole number (P2) stored in the NC numerical controller,
The table is moved via the movement trajectory (100) to stop. At this time, the NC program shown in FIG. 4 executes the program from the beginning, and automatically proceeds to the same position as when the program proceeds to the initial hole number (H2). When the user confirms the connection of the wire electrodes and starts the start, the processing of the next shape, that is, the second shape left uncut, is automatically started. When processing is completed (P4)
The table automatically moves to the point via the movement locus (101) and stops. At this time, the NC in FIG.
The program proceeds and stops at the initial hole number 4. Then move to (P7) and (P8) in the same way,
Post-processing is performed on the uncut shape shown in FIG.

In the above-described embodiment, the case where the shape skipped during the processing is reworked has been described. However, the same effect can be obtained when a plurality of shapes are continuously processed and only a specific shape is selected and processed. To play.

[Effects of the Invention] As described above, according to the present invention, when a plurality of shape processings are continuously performed, among the plurality of shape processings, if the shape processing can be continued, the shape processing is performed. In the case of a shape machining in which machining cannot be continued, in the wire electric discharge machining method in which the shape machining is skipped and the next shape machining is performed, and the skipped shape is reworked after the end of the continuous machining, the machining continuation is not performed. In the case of possible shape processing, the shape processing is skipped and data related to the shape processing is stored, and when the skipped shape is reworked, the data related to the stored skip shape processing is used. When the wire electrode and the table are relatively moved so that the wire electrode directly moves from the continuous processing end point to the first initial hole according to the skipped shape. In addition, since the program is automatically set so as to start machining from the first initial hole, in the remachining, a wire is connected to the first initial hole relating to the skipped shape from the continuous machining end point. When the electrode is moved, the first initial hole according to the skipped shape is eliminated by starting the movement from the first initial hole and eliminating the idle feed of the table to reach the first initial hole according to the shape requiring rework. There is an effect that the wire electrode can be directly and automatically moved to the hole, and the efficiency of rework can be improved without requiring an inefficient operation such as manually running a program.

Further, in the wire electric discharge machining method according to another invention of the present invention, when performing a plurality of shape machining continuously, among the plurality of shape machining, if the shape machining can be continued, the shape machining is performed. At the same time, if the shape cannot be processed, skip the shape processing and perform the next shape processing.
In the wire electric discharge machining method of reworking the skipped shape after the end of the continuous machining, in the case of the shape machining in which the machining cannot be continued, the shape machining is skipped and the data relating to the shape machining is stored, At the time of reworking the skipped shape, using the stored data relating to the skipped shape processing, the wire electrode is configured to perform the second reworking from the processing end point of the shape requiring the previous reworking. The wire electrode and the table are relatively moved so as to move directly to the initial hole of
Since the program is automatically set so as to perform the processing from the second initial hole, the second processing relating to the shape requiring the next rework is performed from the processing end point of the shape requiring the previous rework. When the wire electrode is moved to the initial hole of the first position, the movement from the previous initial hole is started, and the table is not moved to the second initial hole having the shape requiring the next rework. The wire electrode can be directly and automatically moved to the second initial hole having a shape requiring processing, and the efficiency of reprocessing can be improved without the need for inefficient work such as manually running a program. There is an effect that.

[Brief description of the drawings]

FIG. 1 is a machining locus diagram showing a wire electric discharge machining method according to an embodiment of the present invention, FIG. 2 is a diagram showing a conventional wire electric discharge machining device, and FIG. 3 is a machining locus diagram showing a conventional wire electric discharge machining method. FIG. 4 is a program showing a conventional wire electric discharge machining method, and FIG. 5 is a table showing shape remaining data showing a conventional wire electric discharge machining method. In the figure, (100) is a first movement trajectory, (101) is a second movement trajectory, (102) is a third movement trajectory, and (103) is a fourth movement trajectory. In the drawings, the same reference numerals indicate the same parts.

Claims (2)

(57) [Claims] When performing a plurality of shaping operations in succession, among the plurality of shaping operations, if the shaping can be continued, the shaping is performed, and if the shaping cannot be continued, the shaping is not possible. In the wire electric discharge machining method of skipping the shape processing and performing the next shape processing and reprocessing the skipped shape after the end of the continuous processing, in the case of the shape processing in which the processing cannot be continued, the shape is While skipping the processing and storing the data relating to the shape processing, when re-processing the skipped shape, using the data relating to the stored skip shape processing,
To move the wire electrode and the table relatively so that the wire electrode directly moves from the continuous processing end point to the first initial hole according to the skipped shape, and to start processing from the first initial hole. A wire electric discharge machining method characterized by automatically setting a program. 2. When performing a plurality of shaping operations in succession, among the plurality of shaping operations, if the shaping process can be continued, the shaping is performed, and if the shaping cannot be continued, the shaping is not possible. In the wire electric discharge machining method of skipping the shape processing and performing the next shape processing and reprocessing the skipped shape after the end of the continuous processing, in the case of the shape processing in which the processing cannot be continued, the shape is While skipping the processing and storing the data relating to the shape processing, when re-processing the skipped shape, using the data relating to the stored skip shape processing,
The wire electrode and the table are relatively moved so that the wire electrode directly moves from the processing end point of the shape requiring the previous rework to the second initial hole relating to the shape requiring the next rework, and A wire electric discharge machining method, wherein a program is automatically set so that machining is performed from an initial hole.