Method and apparatus for generating machining pulses for electrical discharge machining
AssigneeAgie SA
InventorRino D'Amario
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Abstract
An apparatus and a method of generating machining pulses for electrical discharge machining by discharge of at least one line applying a voltage to a working gap formed between a machining electrode and a workpiece, including the steps of: charging the line via a first charging circuit by a voltage source, discharging the line after ignition of the spark gap directly via a diode, without impedance matching, at the working gap, and recharging the line after a predefined pulse-off time.
Claims31
A method of generating machining pulses for electrical discharge machining by discharging at least one line to apply a voltage to a working gap formed between a machining electrode and a workpiece, comprising the steps of:
- charging the line to store energy substantially capacitatively via a first charging circuit by a voltage source,
- igniting a spark gap;
- discharging the line after ignition of the spark gap via a diode connected between the line and the working gap, without using impedance matching circuitry, at the working gap, and
- substantially capacitatively recharging the line after a predefined pulse-off time.
An apparatus for generating machining pulses for electrical discharge machining by discharge of at least one line to apply a voltage to a working gap formed between a machining electrode and a workpiece and discharging energy stored substantially capacitively in said line for generating machining pulses for electrical discharge machining, comprising a first charging circuit connected to a voltage source for charging the line from a generator end, and discharging the line after ignition of the spark gap via a diode connected between the line and the working gap, without using impedance matching circuitry, at the working gap, and for recharging the line after a predefined pulse-off time, wherein the line is configured to store energy substantially capacitatively.
A method for generating machining pulses for electrical discharge machining an apparatus by discharging of at least one line, applying a voltage to a working gap formed between a machining electrode and a workpiece, wherein the apparatus comprises a first charging circuit connected to a voltage source for charging the line from a generator end, and discharging the line after ignition of the spark gap via a diode connected between the line and the working gap, without using impedance matching circuitry, at the working gap, and for recharging the line after a predetermined pulse-off time, wherein the line is configured to store energy substantially capacitatively, the method, comprising generating machining pulses having a leading edge reaching a amplitude of about 6 A to 100 A no later than about 100 ns after ignition of a spark gap.
Dependencies are inferred from the claim text.