歯形工具の板厚方向圧縮によって生じたしわを利用した金属薄板の張出し成形(機械要素,潤滑,工作,生産管理など)

概要

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For example, strain-hardened aluminum sheet has only poor stretchability. But it has still enough ductility. This study aims to give the same deformation as "stretching" for these materials not by tension in plane but compression for thickness direction. Tooth-shaped tool was made, and thin aluminum sheet was compressed between the tool and flat die. Material under the tooth yielded, flowed out into grooves next the tooth, buckled, and formed wrinkle. To check stretchability of sheet with wrinkle, strip specimen was machined out and examined. The strip did not fracture by tensile force before the wrinkle was stretched out. Finally sheet with wrinkle was pure-stretched using an elliptic-headed punch and confirmed to have very large forming depth.
一般社団法人日本機械学会の論文
2002-08-25