US 12,447,543 B2
Pulsed electrochemical machining
Rusty M. Garner, Indianapolis, IN (US); Damon Ward, Indianapolis, IN (US); and Monica Sy Munoz, Indianapolis, IN (US)
Assigned to Rolls-Royce Corporation, Indianapolis, IN (US)
Filed by Rolls-Royce Corporation, Indianapolis, IN (US)
Filed on Sep. 30, 2022, as Appl. No. 17/937,074.
Prior Publication US 2024/0109141 A1, Apr. 4, 2024
Int. Cl. B23H 3/06 (2006.01); B23H 3/02 (2006.01); B23H 3/10 (2006.01); B33Y 80/00 (2015.01)
CPC B23H 3/06 (2013.01) [B23H 3/02 (2013.01); B23H 3/10 (2013.01); B23H 2300/10 (2013.01); B33Y 80/00 (2014.12)] 19 Claims
OG exemplary drawing
 
1. A pulsed electrochemical machining (pECM) assembly, comprising:
a tool body defining a tool axis, the tool body comprising an electrode, the electrode comprising an electrically conductive material and defining a working surface configured to face a workpiece, wherein:
the working surface defines a plurality of apertures configured to fluidically couple to an electrolyte system,
the working surface comprises a central portion of the working surface and a perimeter portion of the working surface, wherein a surface area of the central portion is approximately equal to a surface area of the perimeter portion,
the central portion is configured to deliver a greater volume of electrolyte to the interelectrode gap than the perimeter portion, and
the central portion defines more aperture area per unit total area than the perimeter portion.