Patent ID: 7594987
Filing Date: 2009-09-29
Classification: B23H

Abstract:
1. A method for electroerosive material machining of a workpiece with an elongated tool electrode, comprising the steps of: holding the tool electrode in a tool head by an electrode feed drive device in such a way that a free end part of the tool electrode forms a machining electrode face, at a spacing opposite the workpiece, and a machining gap, flushed with a machining fluid, is defined between the electrode face and the workpiece, applying an erosive machining current between the tool electrode and the workpiece in order to remove material electroerosively from the workpiece, threading the tool electrode, between the tool head and the free end part, through a tool electrode guide thereby defining a deflecting part of the tool electrode within the electrode guide, and to optimize the machining gap, deflecting the deflecting part of the tool electrode in the electrode guide in a direction transverse to an axis of the tool electrode by a deflecting force of an external magnetic field, thereby producing an axial motion of the free end part, wherein the deflecting force is proportionally dependent on the erosive machining current when the magnetic field is kept constant.