Electrical discharge machine apparatus tilted current pickup

Details Electrical discharge machine apparatus tilted current pickup Electrical discharge machine apparatus tilted current pickup

B - Operations, Transporting

23

H

B23H 7/10 (2006.01)

Patent

CA 2050307

2050307 9011158 PCTABS00002 A current pickup assembly for placing electrical current on a moving wire electrode (12) in an electrical discharge machine apparatus and having a normal straight line of travel. The current pickup assembly includes a current pickup (36) having a bore (38) therethrough for receiving the wire electrode (12). The bore longitudinal axis (R) is at an angle (.alpha.) with respect to the normal straight line of wire travel and the moving wire electrode (12) contacts the bore contact wall (40) therein. A pivot means is provided for selectively pivoting the carbide pickup longitudinal axis (R) at an angle (.alpha.) with respect to the straight line of wire travel. A rotation means rotates the current pickup (36) about the bore longitudinal axis (R). In the alternative, the current pickup is supported on a gimball means for selectively pivoting the pickup about two mutually perpendicular and intersecting axes of rotation (X, Y) intersecting at a point (42). A control shaft (46) connected to the current pickup (36) and engaged with a connecting rod (54) are driven by a drive means (m) through a variable displacement means. Thus, selective angular displacement of the bore longitudinal axis from the normal straight line of wire travel and also rotational movement of the bore longitudinal axis about the normal straight line of wire travel are provided.

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