ワイヤ放電加工中のワイヤ電極に作用する電磁力の影響

概要

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This paper compares the magnitude of the electromagnetic force applied to the wire electrode during wire electrical discharge machining (WEDM) with those of other forces: electrostatic force and discharge reaction force. Both the electromagnetic force and electrostatic force were analytically obtained and found to be in agreement with those obtained from experiments. Then the discharge reaction force was determined by solving the inverse problem where the discharge reaction force was modified until the measured wire vibration agreed with that calculated using the above mentioned electromagnetic and electrostatic forces. It was found that the influence of the electromagnetic force on the wire movement is not negligibly small under rough cutting conditions, especially with higher discharge frequency and larger workpiece thickness.