Multiple head EDM tool for valve rods - has table incorporating electrodes and radial ducts to distribute electrolyte to each machining position

摘要

The electrolytic eroding machine may be used in the machining of relatively small components, e.g. valve-rods for I.C engines, and may produce precisely machined surfaces simultaneously on six or more pieces. The machine may comprise a sealed vessel containing six circumferentially disposed machining stations. At each station work is lowered to be presented to a machining electrode (18). Electrolyte is distributed from the centre of the table, and flows between the electrode and the piece at the same time as a continuous electric current. The table comprises conductive layers overlain by a synthetic slab, accommodates radial ducts for the electrolyte, and includes a recess at each station. Each recess houses the cathodic machining electrode within a spacer.