Electric discharge machining apparatus

• Main Authors: Saitoh, Nagao, Mohri, Naotake, Akune, Mitsuaki, Nakagawa, Hajime, Nakagawa, Takayuki, Imai, Yoshihito
• Format: Patent
• Language: English
• Published: 28.10.2004

An electric discharge machine in which electric power for machining is supplied by a machining electric power supply means ( 13 ) to between an electrode ( 1 ) and a workpiece ( 2 ) provided in a machining solution ( 3 ), electric discharge machining is conducted on the workpiece ( 2 ) while the electrode ( 1 ) and the workpiece ( 2 ) are relatively being moved by a positioning means, and a jumping motion is conducted, the electric discharge machine comprising: a machining reaction force detecting means ( 20, 21, 22 ) for detecting a machining reaction force; a machining reaction force specified value setting means ( 23 ) for setting a specified value of the machining reaction force; a machining reaction force comparing means ( 24 ) for comparing a detected value of the machining reaction force, which is detected by the machining reaction force detecting means ( 20, 21, 22 ), with a specified value of the machining reaction force which is set by the machining reaction force specified value setting means ( 23 ); and a motion locus changing means ( 25 ) for changing a locus of the jumping motion so that the machining reaction force can be reduced in the case where the machining reaction force comparing means ( 24 ) finds that the detected value of the machining reaction force is higher than the specified value of the machining reaction force. Damage of parts of the primary shaft can be prevented and also deterioration of the machining accuracy can be prevented, and the productivity of electric discharge machining can be enhanced.