Contributo in atti di convegno, 2022, ENG, 10.3850/978-981-18-5180-3_RP20-0044

Micro-EDM milling of free form surfaces exploiting a 2 DOF high-precision rotary table: preliminary tests

Modica F., Basile V., Fassi I.

CNR-STIIMA Bari, CNR-STIIMA Bari, CNR-STIIMA Milano

Traditional 3-degree of freedom micro-EDM milling adopts the layer-by-layer approach to easily compensate for the tool wear and reduce the corresponding machining error. However, the layer-by-layer approach discretizes the nominal geometry and influences machining accuracy. The problem becomes more evident when free-form surfaces are fabricated. Similar to conventional milling, the adoption of interpolating rotational axes can potentially improve the process performance in terms of geometrical accuracy. In the present study, high-precision rotating axes are adopted to investigate the machining strategy when the tool is engaged using a 4th rotating axis in freeform surface finishing. The study is developed by performing micro-milling tests of cylindrical slots, analyzing the tool wear behavior and the process performance, and comparing them to the planar layer-by-layer micro-milling approach. Results show the feasibility of the proposed approach.

5th World Congress on Micro and Nano Manufacturing WCMNM 2022, pp. 97–101, Leuven, Belgio, 19-22 Settembre 2022

Keywords

micro-EDM, micro-features, 3D machining, 5 dof micro-EDM machining

CNR authors

Fassi Irene, Modica Francesco Giovanni, Basile Vito

CNR institutes

STIIMA – Istituto di Sistemi e Tecnologie Industriali Intelligenti per il Manifatturiero Avanzato