JPH05301124A - Molding method and device for electric discharge machined electrode - Google Patents

Abstract

PURPOSE:To prevent the surface of a disc electrode from being worn away in any particular place to keep it flat by locating the disc electrode in such a way that the central axis of the disc of the disc electrode which forms a plane in parallel with the axial direction of a machined electrode. CONSTITUTION:A machined electrode 11 attached to a spindle 12 rotates around the spindle 12. A disc electrode 15 forms a plane in parallel with the axial direction of the machined electrode 11 and is located in such a way that the central axis 16 of a disc 14 is orthogonal to the axis of the machined electrode 11. The disc electrode 15 is rotated around the central axis 16 of the disc 14 by a rotational drive device 18 and the disc electrode 15 is contacted with the machined electrode 11 by a disc electrode contact device 20 to cause electric discharge machining, allowing the machined electrode 11 to be molded. Because the disc electrode 15 is uniformly worn away, the position of a plane formed by the disc 14 is unchanged, the flatness of the plane is maintained, and the machined electrode is not moved in the feeding direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming an electric discharge machining electrode, which can always machine an electrode used for electric discharge machining into a correct shape.

[0002]

2. Description of the Related Art Conventionally, in electric discharge machining, for example, in order to form a hole having a minute size, an electrode having a minute thickness is required.
An electrode is formed by electric discharge machining, and an apparatus for that is, for example, one shown in FIG.

That is, the electrode (secondary electrode) 1 to be molded
Is attached to the main shaft 2, the main shaft 2 and the electrode 1 are slowly rotated, and the working electrode 1 as a secondary electrode and the primary electrode 3 having a plane 4 parallel to the axis of the main shaft 2 are brought close to the working electrode 1. Then, the flat surface 4 of the primary electrode 3 is brought into contact with the outer surface 5 of the machining electrode 1 to cause an electric discharge between both electrodes, and the machining electrode 1 is moved in a feed direction parallel to the primary electrode 3,
The processing electrode 1 is formed.

[0004]

[Problems to be Solved by the Invention] By the way,
In the conventional electric discharge machining, while the machining electrode (secondary electrode) 1 is moved in parallel with the primary electrode 3 in the feed direction, the machining electrode 1 is formed into a thin cylindrical shape, but the machining electrode 1 moves. The plane of the primary electrode 3 must be placed exactly parallel to the direction. Moreover, the primary electrode 3 is also worn at the same time when the machining electrode 1 is molded, the shape of the plane 4 thereof is changed, the position of the plane 4 is displaced, and it is no longer parallel to the moving direction of the machining electrode 1. Therefore, when the machining electrode 1 is molded, the primary electrode 3 is always used.
There was a problem that the machining electrode 1 had to be moved in the feed direction while the position of the plane 4 was corrected.

The present invention has been made in view of such conventional problems. When the machining electrode is formed by electric discharge machining, the plane position of the primary electrode can be easily set and the machining can be performed. Moreover, it is an object of the present invention to provide a method and an apparatus for forming an electric discharge machining electrode, which does not move the machining electrode in the feed direction.

[0006]

As a means for solving the above problems, the present invention provides a method for forming an electric discharge machining electrode for forming a machining electrode for performing electric discharge machining, using the machining electrode as a main spindle. A disc-shaped electrode that is rotatably mounted and rotates the machining electrode about the axis to form a plane parallel to the axial direction of the machining electrode, and the center axis of the disc of the disc-shaped electrode is machined as described above. By arranging so as to be orthogonal to the axis of the electrode and rotating about the central axis of the disk, by performing electrical discharge machining by abutting the disk-shaped electrode toward the machining electrode,
The processing electrode was formed into a predetermined shape.

Further, an electric discharge machining electrode forming apparatus for forming a machining electrode for performing electric discharge machining comprises a main shaft for rotatably mounting the machining electrode and rotating it about its axis, and a plane parallel to the axial direction of the machining electrode. A disk-shaped electrode that is formed of a disk and is arranged such that the central axis of the disk is orthogonal to the axis of the processing electrode, and rotation that rotates the disk-shaped electrode around the central axis of the disk. A drive device and a disc-shaped electrode contact device for contacting the disc-shaped electrode with the machining electrode to perform electric discharge machining are provided.

[0008]

Next, the operation of the present invention will be described. The machining electrode attached to the spindle rotates about the spindle. The disc-shaped electrode forms a plane parallel to the axial direction of the machining electrode, and is arranged so that the central axis of the disc is orthogonal to the axis of the machining electrode. Then, the disk electrode is rotated around the center axis of the disk by the rotation drive device, and the disk electrode is brought into contact with the machining electrode by the disk electrode contact device to perform electric discharge machining. The processed electrode is formed by being broken. At this time, since the disc-shaped electrode is uniformly worn, the position of the plane formed by the disc is not displaced, the flatness is not impaired, and the machining electrode is not moved in the feed direction. ..

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram of the present invention, which is an electric discharge machining electrode forming apparatus 10.
Rotatably rotates the secondary electrode 11 which is a machining electrode.
And a rotary motor 13 for rotating about its axis.

As a primary electrode, a disk-shaped electrode 15 forming a plane parallel to the axial direction of the secondary electrode 11 is provided.
In the disk-shaped electrode 15, the central axis 16 of the disk 14 is the secondary electrode 1
It is arranged so as to be orthogonal to the first axis, but in this case, the two axes do not necessarily intersect with the orthogonal. A rotary drive device 18 is provided to rotate the disk-shaped electrode 15 around the central axis 16 of the disk 14.

In such a state that both electrodes are rotated, the disk-shaped electrode 15 is brought into contact with the machining electrode 11 together with the rotation driving device 18 thereof, so that the disk-shaped electrode abuts for electric discharge machining. A device 20 is provided.

To form an electric discharge machining electrode by the electric discharge machining electrode forming apparatus 10, first, the machining electrode (secondary electrode) 1 is formed.
1 is rotatably attached to the spindle 12, and the spindle 12 is rotated by the rotary motor 13 about the axis of the machining electrode 11. Then, while rotating the disk-shaped electrode 15 about the central axis 16 of the disk 14 by the rotation driving device 18, the disk-shaped electrode contacting device 20 contacts the machining electrode 11 for electrical discharge machining. .

The disk-shaped electrode 15 as the primary electrode is the disk 1
4 forms a plane parallel to the axial direction of the processing electrode 11. When the machining electrode 11 is formed while the disc 14 is in contact with the machining electrode 11, the disc 14
Of course, the surface of the disk wears, but since the disk 14 performs electrical discharge machining while rotating, the surface of the disk wears uniformly.

Therefore, a part of the flat surface formed by the disk 14 of the disk-shaped electrode 15 is not worn and it is not necessary to modify it. In addition, the disk 14 of the disk-shaped electrode 15
Since the surface of is uniformly worn, a flat surface is always held, and it is not necessary to carry out a parallelizing operation each time it is machined, and the machining electrode 11 is not moved in the feed direction.

In the above embodiment, the machining electrode 11 is described as having a shorter radius than the disc of the disc electrode.
The length and size ratio of the processing electrode are not limited to those shown in FIG. Further, the rotation drive device 18 and the disc-shaped electrode contact device 20 are not limited to the shapes shown in FIG.

[0016]

As described above, according to the present invention, there is provided a method for forming an electric discharge machining electrode for forming a machining electrode for electric discharge machining, in which the machining electrode is rotatably attached to the main shaft and the machining electrode is attached to the shaft. While rotating about the center, the disk-shaped electrode forming a plane parallel to the axial direction of the machining electrode is arranged so that the central axis of the disk is orthogonal to the axis of the machining electrode,
Since the disk electrode is rotated about the central axis of the disk, and the disk electrode is brought into contact with the machining electrode to perform electric discharge machining, the machining electrode is formed into a predetermined shape.
The surface of the disk-shaped electrode is not worn at a specific place and is always kept flat, so that an accurate processed electrode can be formed. In addition, it is not necessary to perform the work of arranging the disk surface of the disk-shaped electrode, which is the primary electrode, in parallel with the moving direction of the processing electrode every time the processing is performed, and a complicated processing program for that is not required, and the electrode forming is performed. Work becomes easy.

Further, an electric discharge machining electrode forming apparatus for forming a machining electrode for electric discharge machining is provided with a main shaft for rotatably mounting the machining electrode and rotating it about its axis, and a plane parallel to the axial direction of the machining electrode. A disk-shaped electrode that is formed of a disk and is arranged such that the central axis of the disk is orthogonal to the axis of the processing electrode, and rotation that rotates the disk-shaped electrode around the central axis of the disk. Since it has a drive device and a disk-shaped electrode contacting device that contacts the disk-shaped electrode with the processing electrode to perform electric discharge machining, it is not necessary to move the processing electrode,
The electrode forming work is simple, and by arranging the disk-shaped electrode center axis and the machining electrode axis perpendicular to each other, it is possible to obtain an electric discharge machining electrode molding device that can always mold an accurate machining electrode. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of the present invention, and is a perspective view of a machining electrode forming apparatus showing a state where a machining electrode is being formed by electric discharge machining.

FIG. 2 is a perspective view of a machining electrode forming apparatus showing a state in which a machining electrode is formed by electric discharge machining by a conventional method.

[Explanation of symbols]

 10 Electrode Machining Electrode Machining Device 11 Machining Electrode (Secondary Electrode) 12 Spindle 14 Disc 15 Disc-shaped Electrode 16 Center Disc (of Disc) 18 Rotation Drive Device 20 Disc-shaped Electrode Contact Device

Claims (2)

[Claims] 1. A method of forming an electric discharge machining electrode for forming a machining electrode for electric discharge machining, wherein the machining electrode is rotatably attached to a main shaft, the machining electrode is rotated about the shaft, and the machining electrode has an axial direction. A disk-shaped electrode forming a plane parallel to is arranged so that the center axis of the disk of the disk-shaped electrode is orthogonal to the axis of the processing electrode, and is rotated about the center axis of the disk. A method for forming an electric discharge machining electrode, comprising forming the machining electrode into a predetermined shape by abutting the disc-shaped electrode toward the machining electrode and performing electric discharge machining. 2. An electric discharge machining electrode forming apparatus for forming a machining electrode for electric discharge machining, wherein a machining shaft is rotatably mounted and rotates about its axis, and a plane parallel to the axial direction of the machining electrode. A disk-shaped electrode that is formed of a disk that forms a disk, and is arranged such that the central axis of the disk is orthogonal to the axis of the processing electrode; and rotating the disk-shaped electrode around the central axis of the disk. An electric discharge machining electrode forming apparatus, comprising: a rotation driving device; and a disc electrode contact device that performs electric discharge machining by bringing the disc electrode into contact with the machining electrode.