Abstract
This paper proposes a novel full kinematic incremental forming process, called three opposite point incremental forming (TOPIF), in which one pair of main opposite forming tools and two pairs of auxiliary opposite tools as the supporting dynamic die are utilized to perform the components along a predefined path. Compared to the conventional kinematic incremental sheet forming (KISF) and SPIF, the process can effectively control the local deformation, improve geometric accuracy and increase the ability to form complex curved surface. The deformation analysis on TOPIF is the key to control the local deformation. A deformation analysis and the strain distributions are proposed based on a plane strain deformation mode. The results by the deformation analysis of a truncated conical shape are in accord with experimental values for 1 mm Al5052.
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