Methods and apparatus for electrically machining a work piece

Details Methods and apparatus for electrically machining a work piece Methods and apparatus for electrically machining a work piece

1977-06-13

1979-06-26

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

2041291, 20412975, 219 69D, B23P 104, B23P 108

Patent

active

041594070

ABSTRACT:
The production of passages in workpieces is described by an electrical method which simultaneously utilizes electrochemical and electrical discharge machining with a single electrode and dilute electrolytes. The method overcomes the metallurgical defects inherent in the recast layer left by electrical discharge machining which is removed by electrochemical machining. The method is particularly suited to producing cooling passages in the turbine blades of gas turbine engines and can be used to produce venturi shaped holes with rounded edges.

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patent: 2796509 (1957-06-01), Blake
patent: 3275538 (1966-09-01), Haupt et al.
patent: 3370147 (1968-02-01), Matulaitis
patent: 3385947 (1968-05-01), Inoue
patent: 3403085 (1968-09-01), Berger et al.
patent: 3417006 (1968-12-01), Inoue
patent: 3461056 (1969-08-01), Maeda et al.
patent: 3562476 (1971-02-01), Rupert
patent: 3616344 (1971-10-01), Peterson et al.

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