Fabrication of Miniature Shell Structures of Stainless Steel Foil and Their Forming Limit in Single Point Incremental Microforming | Zendy

Toshiyuki OBIKAWA | Zendy; Tsutomu Sekine | Zendy

Open Access

Fabrication of Miniature Shell Structures of Stainless Steel Foil and Their Forming Limit in Single Point Incremental Microforming

Author(s) -

Toshiyuki OBIKAWA,

Tsutomu Sekine

Publication year - 2013

Publication title -

international journal of automation technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.513

H-Index - 18

eISSN - 1883-8022

pISSN - 1881-7629

DOI - 10.20965/ijat.2013.p0256

Subject(s) - blank , foil method , materials science , fabrication , shell (structure) , aluminium , aluminum foil , composite material , enhanced data rates for gsm evolution , metallurgy , ultimate tensile strength , limiting , deep drawing , die (integrated circuit) , sheet metal , mechanical engineering , engineering , layer (electronics) , nanotechnology , medicine , telecommunications , alternative medicine , pathology

Single Point Incremental Microforming (SPIMF) using neither dies nor a backing plate is applied to the fabrication of miniature shell structures of stainless steel foil in meso-scale. A piece of 8 µm-thick blank, which is held in a blank holder on a desktop forming machine, is incrementally formed with a thin, round-tip tool. Three kinds of polygonal pyramids are formed, and their forming limits are compared to those when 12 µm-thick aluminum foil is used. It is found that the forming limit of stainless steel foil in forming pyramids depends only on the tensile strain of a triangular lateral face, whereas that of aluminum foil depends on the sum of two principal tensile strains on the surface of a rounded lateral edge. It is also found that the forming limit of stainless steel foil can be drastically increased by SPIMF.

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