Patent ID: 6501232
Filing Date: 2002-12-31
Classification: B23H,C23C

Abstract:
An electric power unit for electric discharge surface treatment by which electric discharge is generated between an electrode for electric discharge surface treatment and a workpiece so that a hard coat is formed on a surface of the workpiece by energy of the electric discharge, the electric power unit for electric discharge surface treatment comprising: a control means for dividing an electric discharge current pulse into a first pulse width T1 (first peak value Ip1), a second pulse width T2 (second peak value Ip2), . . . , and an n-th pulse width Tn (n-th peak value Ipn) (n is an integer 2 and more), the control means for setting the k-th pulse width Tk and the k-th peak value Ipk (1&lE;k&lE;(nâˆ’1), k is an integer) so that a quantity of supply of the hard coat material by the emission of the electrode material can be a predetermined value previously determined according to a predetermined processing condition, the control means for setting the n-th peak value Ipn so that the emission of the electrode material can be suppressed and the electrode component adhering to the workpiece can be melted, and the control means for setting the n-th pulse width Tn at the time corresponding to the predetermined melting condition of the hard coat.