Electrode profile prediction and wear compensation in EDM-milling and micro-EDM-milling

Richard, Jacques (School of Engineering, Architecture and Landscape (hepia), HES-SO // University of Applied Sciences Western Switzerland) ; Giandomenico, Nicola (School of Engineering, Architecture and Landscape (hepia), HES-SO // University of Applied Sciences Western Switzerland)

EDM-milling and micro-EDM-milling aims to machine deep cavities with rotating electrode; those technologies have a great potential, nevertheless the electrode's wear has to be compensated, which is a big challenge. To achieve this, the electrode profile is of crucial importance as it has a direct impact on the part removed material, but in the same time, the wear modifies this profile. This paper will investigate how the electrode profile is related to tool-path trajectory. It will demonstrate the link between wear, trajectory and electrode profile – both from theoretical point of view and by experimental verification. In case of cylindrical shape electrode with a trajectory in full material, the electrode profile is conically self-shaped. With a zigzag pocketing trajectory the self-shaped profile is more complex but linked with the tool-path overlap in a predictable way: it depends upon the volumetric wear, upon the tool-path overlap, tool-path steepness and the EDM gap. In identical conditions, the EDM gap has for effect to more make the electrode's profile more flat. For the micro-EDM-milling (electrode diameter < 0.3 mm); this fact is even more pronounced and lead to the fact that the electrode profile tends to be cylindrical. This makes much easier the tool-path strategy and electrode's wear compensation algorithm. This opens new opportunities for micro-EDM-milling technology.


Note: This article belongs to a special issue: 19th CIRP Conference on Electro Physical and Chemical Machining, 23-27 April 2017, Bilbao, Spain


Mots-clés:
Type d'article:
scientifique
Faculté:
Ingénierie et Architecture
Ecole:
HEPIA - Haute école du paysage, d'ingénierie et d'architecture de Genève
Institut:
inSTI - Institut des Sciences et Technologies industrielles
Classification:
Ingénierie
Date:
2018
Pagination:
6 p.
Publié dans
Procedia CIRP
Numérotation (vol. no.):
2018, 68, pp. 819-824
DOI:
ISSN:
2212-8271
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 Notice créée le 2018-04-24, modifiée le 2018-11-19

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