This paper describes single point micro incremental forming (SPMIF) applied to the fabrication of meso-scale shell structures. The authors have developed SPMIF without using any die and backing plate for flexible micro forming of miniature 3D products in a range of micro meters to sub-millimeters. A desk-top type of CNC milling machine was constructed as an experimental apparatus. Thin aluminum...

In this paper, we revisit the formability of tube expansion by single point incremental forming to account for material strain hardening and non-proportional loading paths that were not taken into consideration in a previously published analytical model process built upon rigid perfectly plastic material. The objective is provide new insight on reason why critical strains at failure are far sup...