Agie Sa

Agie Charmilles Sa

Stefano Bonini

Marco Boccadoro

Reto Knaak

Andrea Buzzini

Giovanni Zaccheo

Paolo Masa

Michele Verdi

The invention relates to a method for electrical discharge machining of workpieces by electrical discharge pulses generated by a power module of an electrical discharge machine. The invention is characterized in that firstly the discharge voltage of a number Nof electrical discharge pulses is acquired and stored, secondly a front discharge voltage () is determined out of this amount of Nacquired discharge voltages and thirdly, the voltage Uhps () of the electrical discharge pulses produced by the power module for machining the workpiece () is adjusted in function of the determined front discharge voltage ().

Method and apparatus for spark-erosion machining of a workpiece

A method for electrical discharge machining a workpiece includes dividing machining time into a sensing interval during which reference values are captured from machining pulses and into a machining interval during which no reference values are captured. The sensing interval includes either a first sensing interval after implementation of a jump motion of the electrode in the working gap or a second sensing interval after application of an extended pause time to at least some of the machining pulses. The extended pause time is longer than a pause time of other ones of the machining pulses. The method also includes sensing an electrical parameter of a current machining pulse and deriving at least one characteristic value from the sensed electrical parameter. The method further includes comparing characteristic value to at least one of the captured reference values and initiating an action depending on a result of the comparison.

Method and device for electrical discharge machining

A method and apparatus for electrical discharge machining of a workpiece wherein an erosion pulse is applied on the tool electrode. During the time of the erosion pulse the voltage (U) set on the electrode is acquired, and the erosion pulse is interrupted, after an asymptotic behavior of the acquired voltage (U) or a value derived therefrom has been acquired. Before the interruption of the erosion pulse an increase of current may occur.

Method and apparatus for electrical discharge machining of a workpiece

A method and apparatus for electrical discharge or electrochemical machining of workpieces, in which a machining electrode is moved relative to a workpiece, the machining is performed in cycles, and the appropriate process parameters are adjusted for machining of the current cycle with consideration of process parameters of the current cycle. To improve this method and the apparatus to the extent that improved geometric machining accuracy is made possible without time losses, stored process parameters of at least one previous cycle are also considered for adjustment of the process parameters of the current cycle.

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Brissago, Switzerland

Stefano Bonini