Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40% zinc or, alternatively, a steel core and a zinc alloy outer layer having a zinc content of from 40-60%. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75% of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40% of the total diameter, the outer layer occupying an area of between 10 and 30%, and the zinc content of the outer layer being between 40 and 60 wt. %. In the alternative embodiment, the steel core occupies an area corresponding to between 50 and 75% of the erosion electrode diameter and the outer layer occupies the balance.

Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40% zinc or, alternatively, a steel core and a zinc alloy outer layer having a zinc content of from 40-60%. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75% of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40% of the total diameter, the outer layer occupying an area of between 10 and 30%, and the zinc content of the outer layer being between 40 and 60 wt. %. In the alternative embodiment, the steel core occupies an area corresponding to between 50 and 75% of the erosion electrode diameter and the outer layer occupies the balance.

Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40 % zinc. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75 % of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40 % of the total diameter, the outer layer occupying an area of between 10 and 30 %, and the zinc content of the outer layer being between 40 and 60 wt. %.

Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10° C. per second, briefly annealed at temperatures above 500° C. and subsequently cooled again very rapidly at cooling speeds higher than 10° C. per second.

Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40% zinc or, alternatively, a steel core and a zinc alloy outer layer having a zinc content of from 40-60%. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75% of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40% of the total diameter, the outer layer occupying an area of between 10 and 30%, and the zinc content of the outer layer being between 40 and 60 wt. %. In the alternative embodiment, the steel core occupies an area corresponding to between 50 and 75% of the erosion electrode diameter and the outer layer occupies the balance.

Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10.degree. C. per second, briefly annealed at temperatures above 500.degree. C. and subsequently cooled again very rapidly at cooling speeds higher than 10.degree. C. per second.

Abstract: A wire-unwinding device in which wire can be unwound from a very large wire drum such that the direction of curvature of the wire is maintained and alternating bendings of the wire are avoided. The wire is guided over a stationary first guide pulley, a second guide pulley, which is changeable in position in order to apply an initial tensioning force, and over a further stationary third guide pulley.

Abstract: A wire electrode for cutting of workpieces by means of spark erosion, which consists of an eroding wire with or without a jacket, with at least the jacket containing one or several metallic alloy parts having a low volatilization temperature, such as zinc, cadmium, lead, antimony, bismuth, graphite or the like, the wire electrode is, in order to yet further increase with little increased expense the removal performance and the finished surface quality, coated with a surface layer of an electrically highly conductive material, as for example silver, gold, rhodium, palladium or iridium or a very thin layer thickness of its alloys.

Abstract: A method for manufacturing an eroding electrode which has an outer layer consisting of a structural composition having a resistance against erosive wear characteristic many times greater than the common eroding electrode. The outer layer initially consists of one or several coatings of a metal alloy having a low volatilization temperature encasing a core of metal or a metal alloy. The encased wire electrode is then annealed at such temperatures until an alloy, which extends from the outer surface of the encasement toward the core, is created and which has a decreasing content of the consitutents of the low volatilzation temperature material or alloy, after which the wire electrode is cooled in a controlled manner to fix the diffusion states.

Abstract: A wire electrode for spark-erosive cutting includes a core area and an outer coating. The wire electrode is reduced in cross section in order to achieve a high surface quality characteristic and a high strength characteristic, is subsequently diffusion annealed in an oxidizing atmosphere, is thereafter again reduced in cross section, is exposed to a recrystallizing annealing and is deformed to a final dimension. The wire electrode has, on the one hand, a very even, fine-granular structure and is, on the other hand, provided with a very even and dense surface, which assures an excellent spark transfer.

Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10° C. per second, briefly annealed at temperatures above 500° C. and subsequently cooled again very rapidly at cooling speeds higher than 10° C. per second.