Indexed rotatable current pick-up for a travelling wire electric

Details Indexed rotatable current pick-up for a travelling wire electric Indexed rotatable current pick-up for a travelling wire electric

1991-05-28

1992-02-18

Evans, Geoff

Electric heating

Metal heating

Cutting or disintegrating

B23H 710

Patent

active

050896806

ABSTRACT:
A cartridge assembly for a travelling wire electrode electrical discharge machining apparatus includes a cartridge barrel having a first open end and a second open end, and a wire guide mounted in the first open end of the cartridge barrel for guiding the wire electrode. A current pick-up holder is mounted in the second open end of the cartridge barrel and includes an index pin for engagement with a current pick-up. A current pick-up is provided for delivering current to the wire electrode, the current pick-up being mounted in the pick-up holder and including a longitudinal bore for engagement with the wire electrode. The current pick-up includes a first end and a second end, with a tool engagement portion located at the first end of the current pick-up for engagement of a tool to rotate the current pick-up relative to the current pick-up holder. An index pin receiving portion is located at the second end of the current pick-up for receiving the index pin of the current pick-up holder. The current pick-up can be rotated through successive indexed orientations to expose new unworn inner peripheral surfaces of the bore of the current pick-up to extend the life of the current pick-up.

REFERENCES:
patent: 4367390 (1983-01-01), Balleys et al.
patent: 4422918 (1983-12-01), Inoue
patent: 4469927 (1984-09-01), Obara et al.
patent: 4563569 (1986-01-01), Shiramizu et al.
patent: 4605834 (1986-08-01), Inoue
patent: 4652717 (1987-03-01), Briffod
patent: 4733038 (1988-03-01), Giradin
patent: 4736085 (1988-04-01), Inoue et al.
patent: 4896013 (1990-01-01), Fricke et al.
patent: 4994643 (1991-02-01), Truty et al.

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