Electroerosive contour-machining method

Details Electroerosive contour-machining method Electroerosive contour-machining method

Filed on

1982-03-18

Date issued

1984-12-04

Examiner

Paschall, M. H.

Patent Class

Electric heating

SubClass

Metal heating

SubSubClass

Cutting or disintegrating

Other Related Categories

219 69M, B23P 108

Type

Patent

Status

active

Patent number

044866429

Description

ABSTRACT:
A method of contour-machining a workpiece by axially transporting an electrode wire through the workpiece while advancing the workpiece relative to the axis of travel of the electrode wire in a plane substantially orthogonal to the axis of travel to electroerosively cut a groove progressively along a programmed closed-loop path of a predetermined contour whereby the workpiece is eventually severed into a central portion and a peripheral portion with respect to the contour-cut groove. The workpiece and wire support/guide members are positioned to enable the workpiece to move relative to the traveling electrode wire in a vertical plane in a two-dimensional coordinate system. The programmed closed-loop path is arranged on the positioned workpiece in the two-dimensional coordinate system and divided into an upper path and a lower path. The positioned workpiece and wire support/guide members are relatively displaced to advance the traveling electrode wire continuously along the programmed cutting path in the coordinate system, first along a portion of said upper path, then along the lower path throughout and finally along the remaining portion of the upper path. The resulting central portion when severed from the peripheral portion is then allowed to fall within and rest on the peripheral portion without hitting on or squeezing the electrode wire against the walls of the peripheral portion.

REFERENCES:
patent: 4123645 (1978-10-01), Shichida et al.
patent: 4193852 (1980-03-01), Inoue

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