JPS61270029A - Electric discharger machining electrode - Google Patents

Abstract

PURPOSE:To promote the improvement of a machining speed and machining accuracy, by forming a column-shaped electrode body, flexed to a shape to the periphery of a machined section, in a hollow structure while providing plural openings in the advance direction of machining and injecting machining fluid into a machining region so as to enable machining chips to be removed. CONSTITUTION:A squared column 1, providing plural openings 12 in one side surface and having a hollow part 11, is flexed to a shape of the periphery of a machined section, and the openings 12 are arranged so as to be faced in the advance direction of machining. Next the column 1 is mounted to an electric discharge machine, and then the machine, machining an end part C of a work 2 by feeding the column in the vertical direction thereafter machining the work in the horizontal direction by feeding the column in the direction of an arrow head D in the drawing finally machining the other end by feeding the column in the vertical direction, obtains a recessed part 3 and an object 4. In this way, the electric discharge machine, preventing short- circuiting or the like of an electrode by removing machining chips from a machining region because the electric discharge machining electrode injects machining fluid in the advance direction of machining, improves a machining speed and machining accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrode for electrical discharge machining. In particular, the present invention relates to improvements in electrical discharge machining electrodes used in die-sinking electrical discharge machines.

[Conventional technology]

A die-sinking electric discharge machine is a machine that processes electrically conductive materials such as copper and brass on the surface of a conductive workpiece such as metal that is immersed in a relatively viscous insulating liquid such as water or oil. The electrodes are brought very close to each other, and the distance between them is maintained at about 5 to 1100B, and intermittent electrical discharge is generated in this gap, and the intermittent electrical discharge softens or melts the processing area of the workpiece extremely locally, and the processing begins. A machine for processing conductive materials, particularly metals, which generates intermittent changes in pressure near the area and peels off the softened or melted workpiece area by the intermittent changes in pressure.

Traditionally, die-sinking electric discharge machines have been used to perform machining only by feeding the machining electrode in the vertical direction. Therefore, the processing that can be done with this is to form four parts in the workpiece with the same shape as the processing electrode, or to create an opening in the workpiece whose inner periphery has the same cross-sectional shape as the processing electrode. The main thing was to form inside. In such machining, it is necessary to peel off a volume of workpiece material equal to the volume of the above-mentioned recess or opening, which requires a long machining time, and has the disadvantage that it is not easy to remove machining waste. there were.

Of these drawbacks, the latter (elimination of machining debris) can be solved by providing a small hole in the central area of the bottom of the machining electrode or workpiece, and
A method for removing machining debris through these small holes has been developed, and its effectiveness is worth evaluating. On the other hand, in order to solve the former problem (slow machining speed due to large peeling volume), for example, as shown in Fig. 4, it is necessary to Using the columnar electrode 1, as shown in Fig. 5, it is first sent vertically to process the end C of the workpiece 2, and then sent in the direction of the arrow to machine the workpiece 2 horizontally. An electrical discharge machining method has been developed in which a concave portion 3 having a shape as shown in FIG. 6 and an object 4 having a shape corresponding to the concave portion 3 are obtained by machining in the same direction.

The present invention is an improvement of the electrical discharge machining electrode used in this improved electrical discharge machining method.

[Problem that the invention seeks to solve]

In this improved electric discharge machining method, the volume to be peeled off is much smaller than in the traditional method, so the machining speed is sufficiently satisfactory, but it is not easy to remove machining debris, and electrode shorting may occur. As a result, the time available for continuous machining is shortened, effectively reducing the machining speed and reducing machining accuracy.

The purpose of the present invention is to eliminate this drawback, and the machined cross section (cross section seen from the direction of processing progress) as shown in Fig. 4.
A columnar electrical discharge machining electrode bent to the shape of the outer periphery of
The objective is to improve the process to facilitate the removal of processing waste.

[Means for solving problems]

The means taken by the present invention to achieve the above object are as shown in FIG. (For cylinders)
, a hollow columnar body provided with multiple openings was bent to the shape of the outer periphery of the machined cross section of electrical discharge machining so that the openings faced in the machining progress direction of electrical discharge machining, and this was used as an electrode for electrical discharge machining. It is something.

[Effect]

When electrical discharge machining fluid is supplied to the hollow portion 11 of the electrical discharge machining electrode made of a hollow columnar body l as shown in FIG. 1(a), this machining fluid is ejected from the opening 12 in the direction of arrow A. Therefore, if this is used, as shown in Figures 1(b) and 1(c), machining fluid will always be injected toward the machining area, and machining debris will be removed as shown by arrow B. be excluded in the direction. As a result, the processing area is always kept clean, so electrode short circuits and the like do not occur.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an electrode for electrical discharge machining according to an embodiment of the present invention will be described with reference to the drawings.

Refer to FIG. 2. A plurality of openings 12 are provided on one side (along one normal line if the columnar body is a cylinder), and have a hollow portion 11.
A rectangular prism 1 with a side length of approximately 5 to 100 layers is prepared.

Refer to FIG. 3. This is bent into the shape of the outer periphery of the processed cross section (cross section viewed from the direction of progress of processing). At this time, the opening 12 is made to face the direction in which the processing progresses.

Refer to Figures 1(b) and 1(c). This is attached to the electrical discharge machine, and fed vertically to machine the end C of the workpiece 2. After that, the machine is fed in the direction of the arrow. The workpiece is machined horizontally, and finally, it is sent vertically upward and the other end (not shown) is machined to obtain a recess 3 and an object 4 as shown in FIG.

The electric discharge machining electrode mentioned above is designed to inject machining fluid in the direction of machining progress, so machining debris is removed from the machining area and electrode short circuits are prevented.

〔Effect of the invention〕

As explained above, the electrode for electric discharge machining according to the present invention is
A hollow columnar body with multiple openings in the machining progress direction is bent to the shape of the outer periphery of the machining cross section (cross section viewed from the machining progress direction), so it can be attached to an electric discharge machine. When electrical discharge machining is performed, machining fluid is injected into the machining area, machining debris can be effectively removed, electrode short circuits, etc. are prevented, and machining speed and machining accuracy are improved.

[Brief explanation of the drawing]

FIG. 1(a) is a perspective view of an electrode for electric discharge machining according to an embodiment of the present invention. FIG. 1(b) is a perspective view showing the usage state of the electrode for electrical discharge machining according to one embodiment of the present invention. FIG. 1(C) is a cross-sectional view showing the usage state of the electrode for electrical discharge machining according to one embodiment of the present invention. FIGS. 2 and 3 are process diagrams for manufacturing an electrode for electrical discharge machining according to an embodiment of the present invention. FIG. 4 is a perspective view of a conventional electrical discharge machining electrode. FIG. 5 is a perspective view showing a state in which a conventional electrical discharge machining electrode is used. FIG. 6 is a perspective view of a workpiece machined using a conventional electrical discharge machining electrode. l...Company-shaped body, 11...Hollow part, 12...Opening, 2...Working object, 3...Processed recess, 4...Processed into a shape corresponding to the recess object.

Claims (1)

[Claims] In an electric discharge machining electrode made of a columnar body 1 bent to the shape of the outer periphery of a machining cross section, the columnar body 1 is a hollow body having a hollow portion 11, and has a plurality of openings 12 in the machining progress direction. An electrode for electrical discharge machining, characterized in that it is formed with.