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Studying Formability Limits By Combining Conventional and Incremental Sheet Forming Process

Chinese Journal of Mechanical Engineering 2021年第4期34卷 78-89页

作者： Fabio Andre Lora Daniel Fritzen Ricardo Alves de Sousa lirio schaffer Department of Materials Engineering Federal University of Recôncavo da BahiaCampus CETENSFeira de SantanaBahia 44085-132Brazil SATC Uni-versity CriciumaBrazil Center of Mechanical Technology and Automation Department of Mechanical EngineeringUniversity of Aveiro3810-193 AveiroPortugal Federal University of Rio Grande do Sul Porto AlegreBrazil

In this work it is assessed the potential of combining conventional and incremental sheet forming processes in a same sheet of *** so-called hybrid forming approach is performed through the manufacture of a pre-forming by conventional forming,followed by incremental sheet *** main objective is analyzing strain *** pre-forming induced in the conventional forming stage will determine the strain paths,directly influencing the strains produced by the incremental *** conduct the study,in the conventional processes,strains were imposed in three different ways with distinct true *** the incremental stage,the pyramid strategy was adopted with different wall *** the experiments,the true strains and the final geometries were *** simulation was also employed for the sake of comparison and correlation with the measured *** could be observed that single-stretch pre-strain was directly proportional to the maximum incremental strains achieved,whereas samples subjected to biaxial pre-strain influenced the formability according to the degree of pre-strain ***-strain driven by the prior deep-drawing operation did not result,in this particular geometry,in increased formability.

关键词： Hybrid forming process Incremental sheet forming Strain paths Numerical simulation

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