Aluminum die sinking EDM machining

stainless steelcoppersteel

EDM or Electric Discharge Machining is a machining process, which consist on remove material from work-piece by electric discharges. The electrode is a very important part of the process. It is a good conductor. It is coated with graphite to improve wear resistance. The size and shape of this piece can be quite varied. During the process, it generates an electric arc between the work-piece and the electrode. This arc reaches a high temperature that produce a crater on the work-piece to develop the final component. To carry out this process usually the two parts, electrode and work-piece, are immersed in a dielectric (electrically nonconducting) liquid which is circulated to flush away debris and permit a higher control of machining temperature. EDM can be carried out using two different types of processes. Sinker EDM or Wire EDM. Sinker EDM: Electrode and work-piece are connected to power supply. Between electrode and work-piece there is an electrical potential. Sparks erode material. Wire EDM: In this type of process is used a thin single-strand metal wire. It can cut a very complicated shapes. Thin single-strand metal wire is normally brass.