The Evaluation of Process Parameters on Springback in V-bending Using the Flexforming Process

• Autor(a) principal: Karaağaç,İbrahim
• Data de Publicação: 2017
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Materials research (São Carlos. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000501291
• topic: Flexforming; Springback; V bending; Hydroforming

One of the most significant problems in bending sheet metals is the springback behavior caused by the elastic stress formed after the bending process. In this study, the effects of forming pressure, die angle and holding time on the springback behavior were experimentally investigated for V-bending using the flexforming process. Furthermore, springback behavior was predicted using a fuzzy logic system based on unexecuted break-test parameters. The study was carried out using a thin rubber membrane instead of the thick ones normally used in flexforming processes. During the flexforming process, it was observed that springback were 60.57% and 41.92% less than those formed by a conventional die for AL1050-0 and AL5754-0 sheet metal materials, respectively. It was determined that an increase of 15 degree in the die angle increased springback values on average by 0.12 degree and 0.23 degree for AL1050-0 and AL5754-0, respectively. It was also found that an increase of 10 seconds in the holding time decreased springback values on average by 0.14 degree and 0.19 degree for AL1050-0 and AL5754-0, respectively. It was determined that there were no forming defects on the surfaces of the parts bent through the flexforming process.