Abstract
Single point incremental forming (SPIF) process is the latest sheet metal forming technique, which developed in the around 1990, this process could generates a local strain on a sheet metal by mean of small rotation forming tool travel follow CNC toolpath on sheet metal blank to form a shell part. The incredible elongating without failure occurs is the main advantage of this process. This paper attempt to explain the deformation mechanism of steel sheet that formed by SPIF in the metallurgical views. The different degree of deformation were investigated by optical microscope, the grain size deformation was used as a data for math modeling of the deformation mechanism.
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