JPS61297034A - Electrode for processing of fine hole - Google Patents

Abstract

PURPOSE:To enable accurate processing by making the part to be held by an electric discharge processing machine in a greater dia. than that of the part to conduct processing of the part processed, and thereby providing easy grasp by machine and increasing rigidity in the transverse direction. CONSTITUTION:Current is supplied to the portion of copper wire 1 to form the part to conduct processing of a work to be processed, while the portion of copper pipe 2 constitutes an intermediate part, and another part of copper pipe 3 forms a part to be held by an electric discharge machine and therethrough the processing current is supplied. Thus the dia. of said part to be held by machine is greater than that of the part to process the work, so that grasp of said held part by the machine is easier, and also the rigidity in transverse direction is enhanced to lead to accomplishment to precise processing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a small hole machining electrode used when forming a small hole by electrical machining.

FIG. 3 is a sectional view showing a conventional small hole machining electrode. Third
Figure (a) shows a small hole-machined electrode formed by a copper wire 1 having a constant diameter. Further, FIG. 3(b) shows a small-hole machining electrode formed by a copper vibrator 2 having a constant diameter. Both the copper wire 1 and the copper pipe 2 are made by cutting a copper rod or copper pipe material having a diameter necessary for a small-hole electrode into an appropriate length. Further, the hollow portion of the copper pipe 2 is formed into a machining fluid supply hole 4 .

The conventional small-hole machining electrode formed as described above has one end, which is the holding part, attached to an electric discharge machine, and by supplying a machining current to the holding part, the other end, which is the machined part, is An electrical discharge is generated between the machine and the workpiece (not shown), thereby forming a desired machined hole in the workpiece.

[Problem that the invention seeks to solve]

The conventional small-hole machining electrode described above is configured as described above, so when the diameters of the machining part and the holding part become smaller, the diameter of the holding part of the small-hole machining electrode becomes smaller accordingly. , This makes it very difficult to firmly hold the holding part in the electrical discharge machine.

Such a small-hole machining electrode has problems such as difficulty in precisely machining a workpiece due to its low rigidity in the lateral direction.

This invention was made to solve these problems, and aims to obtain a small hole machining electrode that can be easily held in an electric discharge machine, has increased lateral rigidity, and can perform precision machining. .

[Means for solving problems]

In the small hole machining electrode according to the present invention, the diameter of the holding part held in the electrical discharge machine is made larger than the diameter of the machining part that processes the workpiece.

[Effect]

In the small hole machining electrode of this invention, the diameter of the holding part held in the electric discharge machine is made larger than the diameter of the machining part that processes the workpiece, so the holding part is held in the electric discharge machine. In addition, the lateral rigidity is improved.

〔Example〕

FIG. 1 shows an embodiment of the present invention. FIG. 3 is a cross-sectional view showing the Mll hole machining electrode. In the figure, l is a copper wire having a constant diameter, and 2 is fixed to a part of the copper wire 1.

A copper pipe 3 having a larger diameter than the copper wire 1 is fixed to a part of the copper vibe 2 and is a copper pipe having a larger diameter than the copper pipe 2. The copper wire 1 and the copper pipe 2, and the copper pipe 2 and the copper pipe 3 are each fixed by inserting a part of the former into a part of the latter, and then fixing each other with a conductive adhesive. ing.

In addition, in the above-mentioned small hole machining electrode, the copper wire 1 portion forms a machining part where electricity is applied to process the workpiece.

A portion of the copper pipe 2 forms an intermediate portion, and a portion of the copper pipe 3 forms a holding portion that is held by an electrical discharge machine that supplies machining current.

In the small hole machining electrode of the present invention formed as described above, the holding portion of the copper pipe 3 is held in an electric discharge machine, and a machining current is supplied to the holding portion. Further, the machining section of the copper wire 1 is configured to machine a small hole in the workpiece 4'f by generating an electrical discharge between the workpiece and the workpiece in the machining fluid.

Figure 2 shows another embodiment of this invention, a small hole processing type &i+.
FIG. Figure 2 (a) Fi, copper #i! Copper pipe 2 interposed between the processed part 1 and the holding part of copper pipe 3
It is constructed in a multi-stage format by providing a plurality of intermediate portions. Further, in FIG. 2(b), the processed portion, the intermediate portion, and the holding portion are integrally formed using the copper wire 1. In addition, as shown in FIG. 2 (el indicates a structure in which a machining part is formed using a wire pipe instead of the copper wire l shown in FIG. 1, and a hollow part of the machining part is formed as a machining liquid supply hole 4. It is.

In the above embodiments, the shape of the processed portion may be cylindrical or other than a cylinder, or the shape of the processed portion and the shape of the holding portion may be different.

Further, in the above embodiment, the copper 81 and each copper pipe 2.
3 may be formed using a material other than copper.

〔Effect of the invention〕

As explained above, this invention is a 14B hole machining electrode, in which the diameter of the holding part held in the electric discharge machine is made larger than the diameter of the machining part that processes the workpiece. The holding part can be easily and reliably held in the electrical discharge machining # for one year.

In order to improve the rigidity in the lateral direction, it has excellent effects such as being able to perform 8-density processing.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a small hole machining electrode which is an embodiment of the present invention, FIG. 2 is a sectional view showing a small hole machining electrode which is another embodiment of the present invention, and FIG. It is a sectional view showing a hole machining electrode. In the figure, 1...copper wire, 2.3...copper pipe, 4
...This is a machining fluid supply hole. In each figure, the same reference numerals indicate the same parts or the priest parts.

Claims (3)

[Claims] (1) A small hole machining electrode has a machining part that processes a workpiece by applying current, and a holding part that is held by an electric discharge machine that supplies machining current, and the diameter of the holding part is set to the machining part. A small hole machining electrode characterized by having a diameter larger than that of the . (2) The small hole machining electrode according to claim 1, wherein the shape of the machining portion is cylindrical or other than a cylinder. (3) The small hole machining electrode according to claim 1, wherein the machining portion is provided with a machining fluid supply hole for supplying machining fluid.