Service for Charmilles electro erosion machines (EDM)

ALMOST EVERYTHING ABOUT ELECTRO EROSION AND ELECTRO EROSION MACHINES (EDM)

In 1770, english scientist Joseph Priestly observed the erosive effect of electrical discharges. Soviet scientists B. Lazarenko and N. Lazarenko tried to eliminate the erosive effect that occurs at electric discharges and sought to exploit this phenomenon and develop a controlled destructive metalworking process. In the year 1943 they obtained the EDM process, controlled by a succession of electrical discharges that occur between two electrical conductors immersed in liquid dielectric.

The principle of using the electric spark generator, called circuit Lazarenko, has been used for many years in the construction of generators for electric discharge machines (EDM). Using this generator to generate controlled electric discharges, through research and development, the metalworking machinery got very performant by using the erosive effect of electrical discharges.

Charmilles began the research of this phenomenon in 1952 and in the year 1955, presented the first electroerosion machine (EDM) at the European machine tool exhibition, in Milan.

To manufacture the pieces with complicated shapes and a very high dimensional accuracy, achieved by injecting plastic material, it’s necessary the use of die sinking machines to achieve complex cavities in the hardened steel blocks. In dies manufacturing, to obtain the fit between the piston and the base plate, must be used the wire EDM machines, for cutting with high precision (micron tolerances) complicated forms of pistons. EDM machines are used in toolhouses for making dies and injection molds, where the cutting processing is expensive or impossible.

A great advantage of the Charmilles EDM machines is the spark generator specially made, which allows the use of copper and brass wire. In the section of wire EDM machines, die sinking and drilling with solid electrode, we present a range of Charmilles EDM machines, and in the section of old wire and die sinking EDM machines, we show the features of older EDM machines.

2005 - CHARMILLES launches on market the die sinking EDM machines using an innovative patented technology, GammaTEC, which can process super-finished pieces in a very short time and with a minimal cost, with extremely low roughness and a shiny mirror aspect.