Drilled Hole Technique for Created Single Point Incremental Forming Limited Diagram

Abstract:

To produce the forming limited diagram for predicting and studying material behavior in sheet metal forming, grid etching or grid marking on blank surface are applied before forming. But in single point incremental forming process, sheet metal blanks are subjected to highly strain or highly deformation which the conventional gridding is no longer to be occurred on the surface of formed part. And some material such as titanium, nickel based alloy etc are difficulty to etch the grid marks on its surface. So this paper is proposed the drilling hole technique to substitute with the grid etching technique in single point incremental forming process. The holes 2 mm. diameter were drilled on the SUS 304 stainless steel blank before forming. The deformed holes are calculated as true major strain and true minor strain and plot into a forming limited diagram. The results are compared with the conventional etching techniques which show an according trend. The drilling hole technique could be used in study the material behavior in single point incremental forming, it a low cost convenient and easy than grid etching technique.

• Periodical: Key Engineering Materials (Volume 658)
• Pages: 177-181
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.658.177
• Online since: July 2015
• Authors: Kittiphat Rattanachan*
• Keywords: Formability, Forming Limited Diagram, Single Point Incremental Forming, True Strain

References

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