Method and device for machining by electrical discharge is non-limitative and preventing the advance rain-effect

摘要

A machine for machining by electrical control is housed a discharge protected against the rain-effect of advance from causes both mechanical and machining by erosion. The security arrangement comprises two detection unit box. The first unit 23 is arranged to reply a drive command signals supplied by the control, 1984, to produce a first detection signal representing a relative displacement control is carried out between the electrode - tool and the workpiece according to a path of the machining program in a database period. The second detection unit 24 is arranged to the electrical reply discharge effective caused in the range of machining in order to produce a second detection signal representing a real carried out, the relative displacement between the electrode - tool and the workpiece according to the path in this database period. A comparator 25 is connected to the two detection unit box in order to compare the first and second detection signal and producing an output signal indicating a difference of the advance real with respect to the advance controlled.