US 11,745,279 B2
System and method for machining workpiece and article machined therefrom
Yong Yang, Minghang District (CN); Bin Wei, Shanghai (CN); Meisam Salahshoor Pirsoltan, Niskayuna, NY (US); Ming Jia, Shanghai (CN); Huiyu Xu, Shanghai (CN); Yibo Gao, Shanghai (CN); William T. Carter, Niskayuna, NY (US); Andrew L. Trimmer, Niskayuna, NY (US); Prabhjot Singh, Niskayuna, NY (US); Pinghai Yang, Niskayuna, NY (US); and Yanzhe Yang, Dayton, OH (US)
Assigned to General Electric Company, Schenectady, NY (US)
Appl. No. 16/302,809
Filed by GENERAL ELECTRIC COMPANY, Schenectady, NY (US)
PCT Filed May 5, 2017, PCT No. PCT/US2017/031278
§ 371(c)(1), (2) Date Nov. 19, 2018,
PCT Pub. No. WO2017/218101, PCT Pub. Date Dec. 21, 2017.
Claims priority of application No. 201610436866.6 (CN), filed on Jun. 17, 2016.
Prior Publication US 2019/0299309 A1, Oct. 3, 2019
Int. Cl. C25F 3/02 (2006.01); B23H 11/00 (2006.01); B22F 3/24 (2006.01); B23H 3/04 (2006.01); C25F 3/06 (2006.01); B23H 9/14 (2006.01); B22F 5/10 (2006.01); C25F 7/00 (2006.01); B33Y 40/20 (2020.01); B22F 10/12 (2021.01); B22F 10/25 (2021.01); B22F 10/28 (2021.01); B22F 10/70 (2021.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01); B23H 9/10 (2006.01); B22F 12/53 (2021.01); B22F 10/40 (2021.01); B22F 10/62 (2021.01); B22F 10/64 (2021.01)
CPC B23H 11/00 (2013.01) [B22F 3/24 (2013.01); B22F 5/10 (2013.01); B22F 10/12 (2021.01); B22F 10/25 (2021.01); B22F 10/28 (2021.01); B22F 10/70 (2021.01); B23H 3/04 (2013.01); B23H 9/14 (2013.01); B33Y 40/20 (2020.01); C25F 3/02 (2013.01); C25F 3/06 (2013.01); C25F 7/00 (2013.01); B22F 10/40 (2021.01); B22F 10/62 (2021.01); B22F 10/64 (2021.01); B22F 12/53 (2021.01); B22F 2003/247 (2013.01); B23H 9/10 (2013.01); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12)] 18 Claims
OG exemplary drawing
 
1. A system for machining a workpiece, the workpiece comprising an interior surface that defines an internal passage, the system comprising:
an electrode located within the internal passage and electrically isolated from the workpiece, the electrode comprising:
a plurality of first portions comprising an electrically non-conductive material and an electrically conductive coating, the electrically conductive coating formed on the electrically non-conductive material of the respective first portions; and
a plurality of second portions comprising an electrically non-conductive material and an electrically conductive strip, the electrically conductive strip formed on the electrically non-conductive material of the respective second portions;
an electrolyte supply configured to supply an electrolyte in a gap between the electrode and the workpiece;
a power supply configured to supply a voltage between the electrode and the workpiece to obtain a smoothed interior surface on the interior surface; and
a remover configured to remove the electrode from within the internal passage after the smoothed interior surface is obtained, the remover comprising a corrosion resistant coating and an etching solution supply, the etching solution supply configured to supply an etching solution configured to chemically dissolve the electrode for removal of the electrode from within the internal passage.