JPS6029242A - Electrode for electrical discharge machining - Google Patents

Abstract

PURPOSE:To aim at making it possible to carry out electrical discharge machining for precise machined diameter and curve, by using a flexible electrode which is obtained such that an electrical discharge wire electrode is disposed, as a core wire, in a metal pipe together with insulator power filled between the gap therebetween, and the diameter of the thus composed metal tube is reduced with the use of dies, rolls or the like. CONSTITUTION:In order to give press-binding of high-insulation powder and flexibility to an electrode, an electrode wire 1 is disposed in a metal pipe 2 having more than 10mm. diameter and less than 3.0mm. wall thickness, which is easily plastic-deformable, with an insulator 3 being filled the gap between the pipe and the core electrical wire to obtain a starting material. Then the material as a whole including the outer shell pipe proper is subjected to plastic-deforming machining with the use of dies, rollers 5 or the like, so that the outer diameter of the material is more and more reduced down to a fine diameter, thereby the electrode wire 1 in the pipe comes to have a fine diameter. Thus, the thinned material may be formed as a finely thin pipe having less than 0.2mm. outer diameter and provided with a flexibility, and as well, the electrode wire therein may have a fine diameter. Further, the material may be connected to a ring pipe section 4 as an electrode holder.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode used for electrical discharge machining.

In conventional electrical discharge machining electrodes, the electrode itself is made of metal, and is not embedded in ceramic.

When performing fine machining from 50 microns to 100 microns as an electrode for electrical discharge machining, f-s machining is performed only on the tip of the electrode.1) The diameter of the avalanche T cannot be accurately machined. .

Furthermore, in order to process a hole with a curved shape, the electrode itself must have good flexibility.

The present invention is based on the fundamentals provided. According to the electrode of the present invention, an electrode wire with a diameter of about 50 microns to 100 microns and a shape embedded in an insulator can be used as an electrode, and also has various features as described below. It is.

The present invention will be described in detail. FIGS. 1 and 2 are shape diagrams of one embodiment of the present invention.

1.11 is an electrode wire. 2 is an outer metal tube body,
Made of stainless steel, etc. Reference numeral 6 denotes an insulating powder made of a ceramic material, and in the embodiment, it is a powder of magnesia or the like. 2
When the outer diameter is less than 2 mm, the entire structure has flexibility, and when it is shaped as shown in FIG. 2, it has a capacity of 17iTiJ. Since the insulating powder 51 is held in the tube body 21 and the electrode wire 1 is tightly crimped, the insulation condition is ensured.

In order to achieve high pressure bonding of insulating powder and flexibility as in the present invention, a metal tube with an outer diameter of 10 mm or more and a wall thickness of 0.6 mm or less that is easy to plastically work is prepared, and the electrode wire is inserted into it. The material is manufactured by filling insulating powder between the tube and the core wire.

The entire outer shell tube is subjected to plastic working using dies, rollers, etc., and is successively processed to have a fine outer diameter.The electrode wires inside also have a fine diameter.

A diagram of the main parts of the process is shown in FIG. 12
2 is an electrode wire, 22 is a tube body, and 62 is ceramic insulating powder. 5 is a plastic working roller whose diameter is reduced. In this way, it is plastically worked with dies and rollers, and its diameter is successively reduced to form a thin tube. Thin tubes made using this method can be made into thin tubes with an outer diameter of 2 mm or less, which also have flexible/pull performance. At the same time, the electrode wire inside can also be made to have a fine diameter.-6 As part of the electrode holder, 4
It can be used in conjunction with the supply pipe section of

[Brief explanation of the drawing]

FIGS. 1 and 2 are shape diagrams of one embodiment of the present invention, and FIG. 6 is a diagram of main parts of the manufacturing process. 1.11.12... Electrode wire. 2,21.22...Outer shell tube. 6.51.52...Insulating powder. 4 holder. 5. Laura〇Patent applicant Kiyoshi Kano

Claims (1)

[Claims] The electrode wire for electrical discharge machining is used as a core wire, and the wire is placed inside an outer shell metal tube, and the gap between the core wire and the tube is filled with insulating powder, and the diameter is further reduced using dies, rolls, etc. An electrode for electrical discharge machining, which is an electrode wire that is the core wire of a material and has flexible properties.