US 12,240,050 B2
Method and apparatus for machining components by means of electrochemical machining
Nicole Feiling, Munich (DE); Markus Zeis, Munich (DE); Roland Huttner, Jesenwang (DE); and Christian Doll, Markt Indersdorf (DE)
Assigned to MTU Aero Engines AG, Munich (DE)
Appl. No. 17/628,644
Filed by MTU Aero Engines AG, Munich (DE)
PCT Filed Jul. 22, 2020, PCT No. PCT/DE2020/000164
§ 371(c)(1), (2) Date Jan. 20, 2022,
PCT Pub. No. WO2021/013284, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 10 2019 210 905.5 (DE), filed on Jul. 23, 2019.
Prior Publication US 2022/0274195 A1, Sep. 1, 2022
Int. Cl. B23H 3/04 (2006.01); B23H 3/10 (2006.01); B23H 7/26 (2006.01)
CPC B23H 3/04 (2013.01) [B23H 3/10 (2013.01); B23H 7/26 (2013.01); B23H 2200/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for machining a substantially planar component by electrochemical machining, wherein the component has internal stresses resulting from preceding manufacturing steps, comprising the steps of:
a) providing a rotationally symmetrical component; the rotationally symmetrical component having a peripheral cylindrical face to be machined;
b) providing at least two tools in the form of electrodes having respective adjustable drive devices therefor;
c) providing an electrolyte between the component and the at least two electrodes;
d) applying a positive voltage to the component and applying a negative voltage to the at least two electrodes;
e) electrochemical machining by moving the at least two electrodes along their respective movement paths with respect to the peripheral cylindrical face of the component via the adjustable respective drive devices, wherein the respective movement paths of the at least two electrodes during the electrochemical machining are coaxial to the component, and whereby a gap between each electrode and the component is flushed with the electrolyte at least intermittently;
wherein the electrochemical machining by the at least two electrodes that are arranged distributed on the component takes place parallel in time and with electrodes separated in space from each other, the respective movement paths thereof running parallel at least in sections or at an angle to an axis of the component arranged in the direction of a short extension of the component via the adjustable respective drive devices;
wherein machining of the peripheral cylindrical face of the rotationally symmetrical component provides a constantly decreasing portion of the peripheral cylindrical face, in which tangential stresses run, remains intact during the machining, the tangential portion of the stresses being reduced in the component in the peripheral cylindrical region of the machining.