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1. (WO2017070557) ELECTRICAL DISCHARGE MACHINING METHOD FOR GENERATING VARIABLE SPRAY-HOLE GEOMETRY

Pub. No.:    WO/2017/070557    International Application No.:    PCT/US2016/058242
Publication Date: Fri Apr 28 01:59:59 CEST 2017 International Filing Date: Sat Oct 22 01:59:59 CEST 2016
IPC: B23H 1/00
B23H 1/02
B23H 1/04
B23H 7/00
B23H 7/26
B23H 7/28
B23H 7/30
B23H 9/00
B23H 9/10
B23H 9/14
F02M 61/00
Applicants: CUMMINS INC.
Inventors: KAO, Chen-Chun
AWAD, John, K.
VALENTIN, Steven
Title: ELECTRICAL DISCHARGE MACHINING METHOD FOR GENERATING VARIABLE SPRAY-HOLE GEOMETRY
Abstract:
A method is provided comprising identifying an alignment point of a workpiece; positioning a first end of an electrode in the direction of the alignment point of the workpiece; applying a first voltage to the electrode wherein the applied first voltage generates a spark; rotating the electrode in a first direction; advancing the electrode toward the alignment point by a first distance wherein advancing the electrode and applying the first voltage creates a first orifice section; applying a second voltage to the electrode and modifying one or more operational parameters of the electrode; advancing the electrode toward the alignment point by a second distance wherein advancing the electrode and applying the second voltage causes formation of at least a second orifice section; wherein the first and second orifice sections cooperate to form an orifice comprising a first flow area and a second flow area.