JPH0615529A - Angle setting device of wire electrode - Google Patents

Abstract

PURPOSE:To provide an angle setting device of a wire electrode capable of correctly setting an angle of a wire electrode before electric discharge machining and of being automated. CONSTITUTION:A measuring stand 4 with a pair of contacts 7, 8 slipped in position in the vertical and the horizontal directions is fixed on an X-Y table, an actual angle of a wire electrode 2 is found from respective coordinates that the wire electrode 2 makes contact with these contacts 7, 8, and by driving a guide 3 in accordance with this actual angle, the wire electrode 2 is corrected to a desired angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire electrode angle setting device in a wire cut electric discharge machine, and more particularly to an angle setting device suitable for vertically extending the wire electrode.

[0002]

2. Description of the Related Art In wire cut electric discharge machining, a spark is generated by applying a predetermined voltage between a wire electrode running in an axial direction and a work piece placed on an XY table. It is a processing method of melting or evaporating a work piece by electric discharge, and its application range has been greatly expanded in recent years including the processing of dies.

In such wire-cut electric discharge machining, the wire electrode is stretched between a pair of guides,
By moving the guide in the X-Y directions, the wire electrode being processed is controlled at an arbitrary angle, but it is necessary to keep the wire electrode vertical and set it at the origin position before processing.

FIG. 5 is a front view showing a conventional example of a vertical device for wire electrodes, and FIG. 6 is a side view of the same. In these figures, 1 is an X provided in the wire cut electric discharge machine
-Y table, 2 is a wire electrode stretched between a pair of guides 3 and 3 provided in the electric discharge machine, and 4 is the X-
The measuring table is fixed on the Y table 1, and a pair of contacts 5 and 6 are arranged on one side surface of the measuring table 4 at a predetermined interval in the vertical direction.

In measuring the verticality of the wire electrode 2, first, the measuring table 4 is fixed on the XY table 1 by using a clamp mechanism. Next, if the wire electrode 2 is run in the axial direction to apply tension to the wire electrode 2 and the inclination of the wire electrode 2 is visually checked in this state,
By moving the head 3 in the X-Y directions, the wire electrode 2 is set at an angle considered to be vertical. After that,
The XY table 1 is driven to bring the wire electrode 2 into contact with both contacts 5, 6.

Here, as shown in FIG. 6, when the wire electrode 2 is tilted by an angle θ with respect to the perpendicular, the wire electrode 2 contacts only the upper contactor 5, and the wire electrode 2 in the opposite direction. When the electrode 2 is tilted, the wire electrode 2 contacts only the lower contactor 6, and only when the wire electrode 2 is vertical, the wire electrode 2 simultaneously contacts both contacts 5,6. Therefore, for example, if the buzzer or the lamp is activated only when the wire electrode 2 contacts both the contacts 5 and 6 at the same time, the worker sets the wire electrode 2 vertically by the buzzer and the lamp. If the wire electrode 2 is not vertical, the head 3 is moved in the XY directions to correct the inclination of the wire electrode 2, and the above-described operation is repeated to make the wire electrode 2 vertical. Set.

[0007]

However, in the above-mentioned conventional wire electrode vertical aligning apparatus, the wire electrode 2 is properly maintained vertically after the approximate verticality of the wire electrode 2 is set visually by the operator. Since it is determined whether or not the wire is slackened by using the measuring table 4, the operator must set the wire electrode 2 vertically by trial and error, and as a result, automation is impossible. It was

The present invention has been made in view of the above-mentioned circumstances of the prior art, and an object thereof is to accurately set the angle of the wire electrode before electric discharge machining and to automate the wire electrode angle setting device. To provide.

[0009]

In order to achieve the above-mentioned object, the present invention is provided between a wire electrode stretched between a pair of guides and a work piece placed on an XY table. In a wire-cut electric discharge machine for generating a spark discharge on a workpiece and processing the workpiece by the spark discharge, the wire-cut electric discharge machine has a pair of contacts that can be mounted on the XY table and are displaced in the vertical and horizontal directions. A measuring table, the wire electrode is brought into contact with both the contactors, a calculating means for calculating the inclination of the wire electrode based on these contact positions, and the guide is driven in the horizontal direction based on the calculated value, A driving means for correcting the wire electrode to a desired angle.

[0010]

By operating the XY table, one contactor and the other contactor are sequentially brought into contact with the wire electrode stretched at a predetermined angle, and the actual angle of the wire electrode from each contact position. Is calculated. If the actual angle is different from the target set angle of the wire electrode, the guide is driven in the horizontal direction to correct the angle of the wire electrode.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a wire electrode angle setting device according to an embodiment of the present invention, FIG. 2 is a side view of a measuring table provided in the angle setting device, and FIG. 3 is a relationship between a wire electrode and both contacts. 4 is a flow chart showing the procedure for setting the angle of the wire electrode, and the portions corresponding to those in FIGS. 5 and 6 are designated by the same reference numerals.

As shown in FIGS. 1 and 2, two V grooves 4a and 4b extending in the horizontal direction are formed on one side surface of the measuring table 4 at a predetermined interval t in the vertical direction. V
A first contact 7 and a second contact 8 are fixed in the grooves 4a and 4b, respectively. Both the first and second contacts 7 and 8 are formed in a cylindrical shape, and the two are displaced in the horizontal direction so as not to overlap each other. Reference numeral 9 denotes a control program provided in the wire-cut electric discharge machine. The control program 9 includes a coordinate detecting means 10 for detecting the movement amount of the XY table 1 and a wire from the coordinates detected by the coordinate detecting means 10. Calculation means 11 for calculating the inclination of the electrode 2
And a drive unit 12 for driving the head 3 in the XY directions based on the actual angle obtained by the calculation unit 11 and correcting the wire electrode 2 to a target angle.

Next, the wire electrode 2 will be described with reference to FIGS. 3 and 4.
The procedure for setting the angle will be described. First, the measuring table 4 is fixed on the XY table 1 by using a clamp mechanism, and the wire electrode 2 is caused to travel in the axial direction to apply tension to the wire electrode 2. For example, when the wire electrode 2 is tilted in the direction shown in FIG. 3, by driving the XY table 1, as shown in FIG.
The contact 7 is brought into contact with the wire electrode 2, and the coordinates at the moment of contact are stored as X ₁ (S-1). Then the first
After separating the contact 7 from the wire electrode 2 and moving the measuring table 4 in the front direction orthogonal to the paper surface of FIG. 3, the second contact 8 is brought into contact with the wire electrode 2 as shown in FIG. 3B. The coordinates at the moment of contact are stored as X ₂ (S-
2). Here, if the distance in the vertical direction between both contacts 7, 8 is set to t, the inclination (real angle) θ of the wire electrode 2
Is calculated as θ = tan ⁻¹ {(X ₂ −X ₁ ) / t} (S-3). Next, the actual angle θ of the wire electrode 2 thus obtained is compared with the target angle θ ₁ (S-4). If they do not match, the head 3 is moved to the X- position by the amount corresponding to the difference. It moves in the X-axis direction and corrects the wire electrode 2 to the target angle θ ₁ (S-5). Therefore, for example, when it is desired to set the wire electrode 2 vertically, since θ ₁ = 0, the wire electrode 2 may be corrected by θ in the direction opposite to the actual angle θ.

The above procedure is applied to the X of the wire electrode 2.
This is a description of setting the angle in the -X direction, and by performing the same procedure as this in the YY direction of the wire electrode 2, the wire electrode 2 is accurately set to the target angle.

As described above, in the above embodiment, the wire electrode 2 can be set at a predetermined angle by the control program 9 provided in the wire cut electric discharge machine.
Automation is possible. Further, since the wire electrode 2 can be set not only vertically but also at various angles, the setup time for the electrical discharge machining that is subsequently performed can be simplified. Further, since both the contacts 7 and 8 have a cylindrical shape, wear due to contact with the traveling wire electrode 2 is small, and accuracy can be improved.

[0016]

As described above, according to the present invention,
Since the real angle of the wire electrode is obtained from the respective coordinates when the wire electrode is brought into contact with the pair of contacts, and the wire electrode is corrected to a desired angle based on this real angle, the angle of the wire electrode is accurately measured. It can be set, and the setting can be automated.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a wire electrode angle setting device according to an embodiment of the present invention.

FIG. 2 is a side view of a measuring table included in the angle setting device of FIG.

FIG. 3 is an explanatory diagram showing a relationship between a wire electrode and both contacts.

FIG. 4 is a flowchart showing a procedure for setting an angle of a wire electrode.

FIG. 5 is a front view showing a vertical device for a wire electrode according to a conventional example.

FIG. 6 is a side view of the vertical alignment device shown in FIG.

[Explanation of symbols]

 1 XY Table 2 Wire Electrode 3 Head 4 Measuring Stand 7 First Contact 8 Second Contact 9 Control Program 10 Coordinate Detecting Means 11 Computing Means 12 Driving Means

Claims (1)

[Claims] 1. A spark discharge is generated between a wire electrode stretched between a pair of guides and a work piece placed on an XY table, and the work piece is processed by the spark discharge. In the wire cut electric discharge machine
A measurement table that can be mounted on the XY table and has a pair of contacts that are displaced in the vertical and horizontal directions, and the wire electrode are brought into contact with both the contacts, and the wire is based on these contact positions. An angle of the wire electrode, which comprises: a calculating means for calculating the inclination of the electrode; and a driving means for horizontally driving the guide based on the calculated value to correct the wire electrode to a desired angle. Setting device.