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Investigations on vibration-assisted EDM-machining of seal slots in high-temperature resistant materials for turbine components. Part II

: Uhlmann, E.; Domingos, D.C.

Fulltext (PDF; )

Procedia CIRP 42 (2016), pp.334-339
ISSN: 2212-8271
Conference on Electro Physical and Chemical Machining <18, 2016, Tokyo>
Conference Paper, Journal Article, Electronic Publication
Fraunhofer IPK ()

In this paper, the innovation and optimization of the die-sinking EDM-machining for producing seal slots in a turbine component is considered. A unit enclosing piezoelectric actuators was designed and implemented for manufacturing high aspect ratio cavities in nickel base alloy MAR-M247 applying graphite electrodes, enabling thereby the vibration-assisted EDM-machining. The aim of the vibration-assisted EDM-machining was to optimize the flushing mechanisms through the vertical vibration of the electrodes. This paper provides a detailed analysis of the EDM-process applying a high-frequency oscilloscope and position measurement sensor. Following the set-up of the vibration amplitude and frequency of tool electrodes, experimental investigations were carried out aiming the determination of process behavior at distinct machining depths.