DE1496801C

DE1496801C - Cathode for electrolytic metalworking

Info

Publication number: DE1496801C
Application number: DE19641496801
Authority: DE
Inventors: Claude Henry; Andrews James Dair; Cincinnati Ohio Auger (V.StA.)
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1963-06-19
Filing date: 1964-05-23
Publication date: 1973-08-09

Description

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 21 2

2 shows a cross-sectional view of the invention

Claim: if a cathode with a circumference running around the outer circumference, wear-resistant surface and

Cathode for electrolytic metalworking Fig. 3 is an isometric view, partly in

tion with an optionally hollow working 5 cut, a solid, rectangular cathode with a

end that has a coating of improved working end according to the invention on the outside,

having dielectric material, thereby creating many, at a close spacing

characterized in that the dielectric air cooling passages located in example

Coating (14) at the working end (18) an electrical way of a turbine blade, it is essential that

insulated metal sleeve (12) surrounds or inside ₁₀ the cathodes have very precise dimensions

is bedded. and run exceptionally straight. The costs

a suitable hollow, tubular cathode are therefore, compared with an ordinary tube,

relatively high. To make a great

ig variety of air-cooled turbine blades are many Cathodes required. However, it has been known that the usefulness and life of these

The invention relates to the electrolytic machining cathode tubes strongly by the abrasion or the

processing of metals by means of improved cathode removal of material on the dielectric coating

with an optionally hollow working end which is impaired at the working end of the cathode. With

on the outside a coating of dielectric of the present invention can now be the Le-

Having material. These cathodes have a service life of about fifty times that of a cathode

longer service life than previously known cathodes. . or more.

With the development of new and difficult to operate. 1 has the generally designated 10

working cathode, resistant to high temperatures, in the form of a hollow metal tube, a

Materials, the development of the material removal electrically conductive inner part 16, an electrically iso-

electrolytically in parallel. lated, metallic part 12, which at the end of the work

In order to produce cavities with a relative 18 in the dielectric coating 14 is embedded.
In a specific embodiment, the outer parts of a cable usually have to be provided with a dielectric coating of a hollow Tithode with a dielectric coating of a pipe which prevents that between the plastic tetrafluoroethylene polymers. In the di-outer sides of the cathode and the already through-electrical coating 14, a titanium sleeve is embedded part of the anode, an electrolytic host which enters through the dielectric coating of kung. 35 from the inner conductive part 16 is insulated. While one of the problems encountered with the use of such dielectric working coatings is that the end 18 of the core 16 generates current. The metallic dielectric material at the working end, which part 12 prevents the tip part from wearing out, first with the surface of or in contact with FIG. Figure 2 shows another embodiment after it is worn very heavily. 40 of the invention, in which the outside of an inside part 16 is removed, once part of the dielectric material part 16 is first removed with a dielectric overlay at the working end, electrolytic traction can be provided which occurs from an external metallic side effect, which an uneven seeing part 12 is surrounded which results in both the Ar cavity and damage or a minor end of the cathode as well as on the side wall of the cathode's ability to work. 45 den. Such an outer part 12 can usually be replaced by the cathode .. the dielectric material pushed on or on. The object of the invention is to be pressed or galvanically applied. The galva cathode with a wear-resistant outer, niche manufacture of the outer metallic, insulating part including the working end. The th part is particularly in the manufacture of catheters. According to the invention, the object is achieved with the irregularly shaped outer dimensions that the dielectric coating on the working end is practical.

an electrically insulated metal sleeve surrounds or Eine.solche irregularly shaped cathode is in

is embedded in it. In the drawings, Fig. 3 shows where there is a conductive

Fig. 1 is a cross-sectional view of a hollow, inner portion 16, a dielectric coating 14 and a tubular portion Embodiment of the inventive 55 working end 18 an electrically insulated outer metallic

ßen cathode, shear part 12 is located.