EDM Machine tool with compounded electrode-reciprocation and ser

Electric heating – Metal heating – Cutting or disintegrating

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219 69M, B23P 108

Patent

active

044305443

ABSTRACT:
An improved EDM machine tool is disclosed in which an electrode reciprocating assembly is mechanically coupled between a movable (e.g. tool) electrode and a machine-head spindle which is axially driven by a motor in response to servo-feed signals. The assembly includes a rotary member driven by a separate motor to reciprocating rotate through a limited angle of rotation and link means for converting a reciprocatory rotary movement of the rotary member into a corresponding rectilinear reciprocal movement of the movable electrode in the servo-feed direction or a direction perpendicular thereto. The stroke and period of electrode reciprocation are determined by the angle and rate of rotation of the rotary member, respectively. The servo-feed operation, especially advance-feed movement therein is interrupted while the reciprocating assembly is in operation. The reciprocating operation is preferably conducted in synchronism with the dielectric flushing operation.

REFERENCES:
patent: 2441319 (1948-05-01), Harding
patent: 3396259 (1968-08-01), Easton
patent: 3564184 (1971-02-01), Kandajan et al.
patent: 3725631 (1973-04-01), Angelucci et al.
patent: 4152570 (1979-05-01), Inoue et al.
patent: 4247749 (1981-01-01), Wavre

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