Patent ID: 6702896
Filing Date: 2004-03-09
Classification: B05D,C23C,C25D

Abstract:
A discharge surface treatment apparatus, comprising:a green compact electrode formed of compressed powder as a discharge electrode; and a power supply device including: an oscillator which generates a pulse current when an electric current from a power source is applied thereto, thereby allowing pulse-type discharge to take place between the discharge electrode and a workpiece to form on a surface of the workpiece a film made of electrode material or of a material obtained when the electrode material reacts to the discharge energy; electric current cut-off means which cuts off the output of said oscillator; and voltage detection means which detects a discharge voltage between said electrode and said workpiece, wherein when a predetermined period of time has passed after said voltage detection means detects the discharge voltage to be less than or equal to the discharge detection voltage set value, then said electric current cut-off means forcibly cuts off the output of said oscillator, and the discharge detection voltage set value is set at a value about 5 to 20% lower than a power-supply voltage.