JPS5837553Y2 - Electrolytic processing equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrolytic grinding jig, and more particularly to an electrolytic processing device with improved shaping of a processing electrode.

Generally, as shown in FIG. 1, an electrolytic machining device rotates a circular electrode 1 made of a conductive material mixed with graphite or abrasive grains, and brings the electrode 1 and the workpiece v02 close to each other. Connect the workpiece 2 to the negative electrode and the positive electrode, and connect 1,
2, a large current is applied to the workpiece 2, and an electrolyte is supplied to the machined surface.
This is a processing method that electrolytically processes.

In this electrolytic processing method, the bonding force is weak because the material of the electrode 1 is graphite, etc. However, since it uses electrolytic action, there is relatively little wear on the electrode, making it suitable for forming grinding. It is a process that

However, in this machining, the tensile strength of the electrode 1 is weak, so the electrode is easily scratched, and if the electrode 1 has a sharp tip or the workpiece 2 has a long surface to be machined, the electrode 1 may be damaged due to electrical discharge, etc. There were drawbacks such as easy wear and the shape of the electrode 1 changed during processing, making it impossible to perform the initial intended processing.

The present invention was developed to eliminate the above-mentioned drawbacks, and is an electrolytic processing device equipped with an electrode molding body that shapes the electrode according to the processing surface and maintains the electrode molding part at a constant height even after re-polishing. The purpose is to provide

The details of the present invention will be explained below with reference to the illustrated embodiments.

FIG. 2 is an enlarged view of the electrode forming part in the electrolytic processing apparatus, showing a structure in which the electrode forming plate 3 is attached to the side surface of the electromagnetic chuck 4, making it possible to form the electrode at the same time during electrolytic processing.

This electrode molded plate 3 is made by copy-grinding hardened die steel, super hard alloy, etc. to form the electrode molded part 5 and the bottom part 6 into the electrode 1, as shown in detail in Fig. 3 a, l). Workpiece 2
The opening angles are inclined at a certain angle θ with respect to the direction of relative movement.

Note that this angle θ is appropriately determined depending on the processing state.

When processing the workpiece 2, first rotate the electrode 1 at low speed,
The electrode molding part 5 of the electrode molding plate 3 is attached to the side surface of the electromagnetic chuck 4 and molded according to the shape to be processed.

Thereafter, the electrode 1 is moved to the side of the workpiece 2 and rotated at high speed.

In this way, an electrolyte is supplied between the electrode 1 and the workpiece vIJ2 by the electrolyte supply nozzle 7, etc., and the electrode 1 is connected to the negative electrode and the workpiece 2 to the positive electrode, and while the electrode 1 is moved in the direction of the workpiece 2, both are connected. When a large current is passed between electrodes 1 and 2, the processed surface of the workpiece 2 is melted and processed into the same shape as the electrode molded portion 5 according to Faraty's law.

However, as mentioned above, if the tip of the electrode 1 is sharp or if the machined surface of the workpiece 2 is long, the electrode 1 and the workpiece
A discharge phenomenon occurs between the two, and the electrode 1 is likely to wear out.

When the wear of electrode 1 becomes large in this way,
It is necessary to reshape the electrode molding plate 3 using the electrode molding plate 3, but if the number of remolding increases, the electrode molding portion 5 of the electrode molding plate 3 will also wear out, and the workpiece 2 will no longer be able to obtain a predetermined machined surface.

At this time, since the electrode molded portion 5 of the electrode molded plate 3 is in line contact with the electrode 1, the electrode molded plate 3 is removed from the electromagnetic chuck 4, and the side surface 8 of the electrode molded plate 3 is A desired electrode molded portion 5 can be easily obtained by re-grinding.

That is, since the bottom part 6 of the electrode molded plate 3 is also inclined at an opening angle parallel to the electrode molded part 5 at the same angle θ, the height H of the electrode molded plate 3 in FIG. It does not change before and after grinding, and when the electrode molding plate 3 is attached to the electromagnetic chuck 4, the molding position of the electrode 1 also does not change.

At this time, either re-drill the mounting hole of the electrode molded plate 3 or
Alternatively, by making the hole an elongated hole, the mounting screw hole of the electromagnetic chuck 4 can be used.

In the above embodiment, the electrode forming plate 3 is attached to the side of the electromagnetic chuck 4 which is machined to be inclined to make it easy to attach. However, the present invention is not limited to this, and as shown in FIG.
You can attach it to the side of the
It may be attached to the side surface of 72 with an insulator 10 interposed therebetween.

Alternatively, as shown in FIGS. 7a and 7b, the electrode molding plate 3 and the electrode molding part 5 may be constructed as separate members, and the electrode molding part 5 may be molded onto the electrode molding plate 3 by brazing or the like.

As detailed above, in this invention, the electrode forming part and the bottom of the electrode forming plate are installed with an opening angle inclined at a certain angle parallel to the direction of relative movement between the electrode and the workpiece, making electrode forming easy. Therefore, it is possible to provide an electrolytic machining apparatus having effects such that even if the electrode molding part is worn out, it can be easily regenerated and the electrode molding part can be easily maintained at a constant height.

[Brief explanation of drawings]

Fig. 1 is a side view schematically showing a general electrolytic processing apparatus, Fig. 2 is an enlarged side view showing an embodiment of the electrolytic processing apparatus of the present invention, and Fig. 3a shows a part of Fig. 2. A further enlarged side view, FIG. 3 is a front view of FIG. 3a, FIG. 4 is a side view for explaining the action of the present invention, and FIGS. FIG. 7a is a side view showing still another embodiment of the processing apparatus, and FIG. 7a is a front view of FIG. 7a. 1...electrode, 2...workpiece, 5...
...Electrode molding part, 3... Electrode molding plate.

Claims (1)

[Scope of utility model registration request] In electrolysis, a circular electrode made of conductive material such as graphite is rotated and brought close to the workpiece, and a large current is passed between the electrode and the workpiece to electrolytically process the workpiece using an electrolytic solution. The processing device includes an electrode forming section that is inclined at an opening angle with respect to the direction of relative movement between the electrode and the workpiece, and an electrode forming section that corresponds to and parallel to the electrode forming section so as to form the electrode according to the processing of the workpiece. an electrode molded body having a bottom with an inclined opening angle, and a workpiece holder having a holding part that holds the electrode molded body by opposing and abutting two surfaces of the electrode molded body and a bottom surface with an inclined opening angle, respectively. An electrolytic processing device characterized by comprising: