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    • 73. 发明专利
    • FR2465551B1
    • 1986-01-24
    • FR8020636
    • 1980-09-25
    • INOUE JAPAX RES
    • INOUE KIYOSHI
    • B23H1/00B23H1/04B23H7/30B23H7/38B23P1/04
    • A method of and an apparatus for electroerosively machining a 3D cavity in a workpiece using a slender tool electrode, e.g. in the form of a wire or thin rod, which is generally independent of desired cavity in shape and axially juxtaposed with the workpiece to define a liquid-flooded machining gap therebetween. The slender tool electrode and the workpiece are relatively displaced three-dimensionally along mutually orthogonal three independent axes so that the slender tool electrode moves in a scanning manner over the workpiece surface while an ultrasonic vibration is imparted to the scanning slender tool electrode. A machining wear of the electrode is sensed in response preferably to the vibration signal and the wear-compensation feed is effected to axially advance the slender electrode independently of the three-dimensional cavity-forming movement to the tool electrode and the workpiece.