JPH06246543A - Electric discharge machining electrode and metal engraving method using this electrode - Google Patents

Abstract

PURPOSE:To exclude experience, intuition or professional knowledge to the utmost in metal engraving work and shorten the electrode manufacturing time. CONSTITUTION:The cut-out part 3 of a masking sheet 2 is machined by shot blasting into a recessed groove shape 4 in electrode material 1 with the masking sheet 2, transfer-cut into the shape to be machined, attached to the surface so as to form an electric discharge machining electrode. A metal plate to be engraved is disposed opposedly to this electrode, and electric discharge engraving is applied to the surface of the metal plate by electric discharge machining, excluding the recessed groove shape of the electrode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved fabrication of electrodes for electric discharge machining and a metal engraving method using the same.

[0002]

2. Description of the Related Art In manufacturing an electrode for electric discharge machining, a method of directly machining an electrode material with a cutting machine, a wire-cut electric discharge machine, an engraving machine or the like, keeping the electrode material in a liquid state and pouring it into a mold Widely used are a method of manufacturing by hardening afterwards, a method of manufacturing by plating a model having an electrode shape with copper, and the like.

[0003]

In the conventional electrode manufacturing method, the required figures and characters are manually engraved on the electrode material by using a sharp metal, and the machining route is digitized and then machined by a computer. The electrode is processed by controlling the machine. In the case of manufacturing a mold or model and then manufacturing electrodes, the work is basically carried out by the same method.

However, the above method requires many years of professional experience and intuition, or specialized knowledge of computer control.

Further, engraving deep irregularities in the electrode material by manual work not only requires a lot of labor and time, but also when the material is directly processed, the processing failure is
Immediately, many cases lead to defective products.

On the other hand, in order to process a shape such as a figure drawn by a free-form curve or a written character that is difficult to quantify on an electrode using an NC machine tool, the coordinates of the curve or straight line to be processed are set at regular intervals. It is necessary to read the data in step S3, process the coordinates continuously, and create an approximate shape of the desired shape.

Further, as shown in FIG. 5, in the case of contour processing of an inner shape, it is difficult to perform processing with a drill or end mill system having a high processing speed if the processing has sharp edges. As described above, it takes a lot of time and technique to manufacture the electrode.

[0008]

The present invention has been proposed in order to eliminate such conventional experience, intuition, or specialized knowledge as much as possible, and to shorten the manufacturing time of the electrode. , For the electrode material 1 with a masking sheet, which has the shape to be processed transferred and cut out, attached to the surface,
This is an electric discharge machining electrode obtained by machining the cutout portion 3 of the masking sheet 2 into a grooved groove type 4 by shot blasting.

Further, a metal plate to be engraved is arranged so as to face the thus-formed electric discharge machining electrode, and electric discharge machining is performed on the surface of the metal plate except for the groove shape of the electric discharge machining electrode. It is a metal engraving method characterized by engraving.

[0010]

[Function] The masking sheet 2 and the shot blasting which are simply cut out with a cutter knife or the like, and the cutout portion 3 provided on the masking sheet 2 are recessed by the shot blasting, so that the electrode can be manufactured in a short time. Made possible. Further, since the electrodes can be manufactured in a short time, the cost of metal engraving can be reduced. Further, it is possible to easily manufacture a shape such as a written character that is difficult to be converted into a numerical value as an electrode.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.
This embodiment is an example in which an electrode of a building foundation plate is manufactured.
First, as shown in FIG. 1, a masking sheet 2 of synthetic rubber is attached to graphite of the electrode material 1. On the surface of the synthetic rubber Masinghi sheet 2, the characters of the foundation written on a paper or the like with a brush are reversed and transferred.

Next, as shown in FIG. 2, the contour of the character is cut out by a cutter knife 7 or the like to form a cutout portion 3. However, the part where the character line is thin or the part where there is a small "splash" is partially masked, and the step of shot blasting is performed separately.

FIG. 3 shows how the shot blasting 8 is performed. By this shot blasting, the portion of the electrode material 1 facing the cutout portion 3 provided in the masking sheet 2 becomes the grooved groove type 4. After that, the masking material is removed, and the electric discharge machining electrode 5 of the present invention provided with the concave groove type 4 is completed.

A state during electric discharge machining using the electric discharge machining electrode 5 of the present invention is shown in FIG. A metal plate 6 to be engraved is arranged so as to face the electrode 5 for electric discharge machining, and electric discharge machining is applied to the surface of the metal plate except the shape of the groove 4 of the electrode 5 by electric discharge machining.

[0015]

INDUSTRIAL APPLICABILITY As described above, the present invention can be carried out without professional experience and intuition, or with specialized knowledge of computer control, there is no processing failure, and no defective product occurs. In addition, processing with sharp edges is possible faithfully.

That is, an electrode for electric discharge machining can be manufactured in a short time, and a figure, a character, etc. can be faithfully and easily made into an electrode. For this reason, it can be widely used for making nameplates, nameplates, company logos and marks, and tombstones using die-sinking EDM. In particular, for a tombstone that has been damaged by acid rain, by engraving letters such as Kai on a stainless plate with little corrosion according to the present invention and attaching it to the tombstone with bolts or the like, it is economically possible. It has the effect of being able to remodel.

[Brief description of drawings]

FIG. 1 is a perspective view of a masking sheet attached to an electrode material.

FIG. 2 is a perspective view showing a state where a contour of a character is cut off by a cutter knife.

FIG. 3 is a perspective view showing a state of processing by shot blasting.

FIG. 4 is a perspective view showing a state during electric discharge machining.

FIG. 5 is a perspective view showing a state during conventional drilling.

[Explanation of symbols]

 1 Electrode Material 2 Masking Sheet 3 Cutout 4 Concave Groove Type 5 Electrode for EDM 6 Metal Plate 8 Shot Blast

Claims (2)

[Claims] 1. For electric discharge machining, wherein a cutout portion 3 of a masking sheet 2 is processed into a concave groove type 4 by shot blasting with respect to an electrode material 1 on which a masking sheet in which a shape to be processed is cut and cut is attached to the surface. electrode. 2. A metal plate to be engraved is arranged so as to face the electrode according to claim 1, and electric discharge machining is performed on the surface of the metal plate except for the concave groove shape of the electrode. Metal engraving method.