Patent ID: 7318884

Claim:
An apparatus for electrochemical precision machining of metallic workpieces, comprising, a casing, a tool holder for an electrode, an oscillating drive mechanism connected to the tool holder to generate an oscillatory motion of the electrode in the machining direction, and a continuously linearly moving feed unit having guiding means for positioning and movably supporting the tool holder, the guiding means including a plurality of cooled and lubricated bearing bushes made of a swelling material and situated in the casing to create liquid chambers in the casing, the oscillating drive mechanism comprising a rocker, arranged vertically to a longitudinal axis of the tool holder and extending through the casing, an upper and lower surface of the rocker, as related to the longitudinal axis of the tool holder, bilaterally mating with the tool holder, with one end of the rocker being firmly clamped with respect to the casing, while an opposite end is driven in an oscillatory motion outside the casing.