Electro-erosive processing apparatus

Details Electro-erosive processing apparatus Electro-erosive processing apparatus

B - Operations, Transporting

23

H

327/31

B23H 7/28 (2006.01)

Patent

CA 1164055

\ ABSTRACT In electro-erosive machining apparatus with multi- dimensional relative motion between a tool electrode and a workpiece electrode, a simple and adaptable control is pro- vided for these relative operating movements, with overall shaping-limiting control and subordinated repetitive oblique erosion cycles. In this connection, the feed of the tool is limited, within individual oblique-erosion cycles, to achieve by repeated cycles a predetermined shaping envelope surface in the workpiece. The processing apparatus comprises two separate coordinating function generators by means of which two operating movements at an angle to each other, are each determinable to achieve a desired operating movement of the tool relative to the workpiece, one being used for shaping-limiting control within a cycle and the other for controlling the relationship of successive cycles. Initia- tion of the consecutive erosion cycles is effected by means of a repetition circuit under control of a shaping-limiting control as a function of convergence of an actual value to a reference value of erosion gap width.

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