Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Modeling and simulation of the fluid flow in wire electrochemical machining with rotating tool (wire ECM)

 
: Klocke, Fritz; Herrig, Tim; Zeis, Markus; Klink, Andreas

:

American Institute of Physics -AIP-, New York:
20th International ESAFORM Conference on Material Forming 2017. Proceedings : 26th-28th April 2017, Dublin City University, Ireland
New York, N.Y.: AIP Press, 2017 (AIP Conference Proceedings 1896)
ISBN: 978-0-7354-1580-5
Art. 050014, 6 pp.
International Conference on Material Forming (ESAFORM) <20, 2017, Dublin>
English
Conference Paper
Fraunhofer IPT ()
wire ECM; simulation

Abstract
Combining the working principle of electrochemical machining (ECM) with a universal rotating tool, like a wire, could manage lots of challenges of the classical ECM sinking process. Such a wire-ECM process could be able to machine flexible and efficient 2.5-dimensional geometries like fir tree slots in turbine discs. Nowadays, established manufacturing technologies for slotting turbine discs are broaching and wire electrical discharge machining (wire EDM). Nevertheless, high requirements on surface integrity of turbine parts need cost intensive process development and - in case of wire-EDM - trim cuts to reduce the heat affected rim zone. Due to the process specific advantages, ECM is an attractive alternative manufacturing technology and is getting more and more relevant for sinking applications within the last few years. But ECM is also opposed with high costs for process development and complex electrolyte flow devices. In the past, few studies deal with the development of a wire ECM process to meet these challenges. However, previous concepts of wire ECM were only suitable for micro machining applications. Due to insufficient flushing concepts the application of the process for machining macro geometries failed. Therefore, this paper presents the modleing and simulation of a new flushing approach for process assessment. The suitability of a rotating structured wire electrode in combination with an axial flushing for electrodes with high aspect ratios is investigated and discussed.

: http://publica.fraunhofer.de/documents/N-481136.html