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Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision

Laser-assisted forming provides a perfect solution that overcomes the formability of low-ductility materials. In this study, laser-assisted robotic roller forming (LRRF) was applied to bend ultrahigh-strength steel sheet (a quenching and partitioning steel with a strength grade of 1180 MPa), and the...

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Autores principales: Min, Junying, Wang, Jincheng, Lian, Junhe, Liu, Yi, Hou, Zeran
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921020/
https://www.ncbi.nlm.nih.gov/pubmed/36770033
http://dx.doi.org/10.3390/ma16031026
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author Min, Junying
Wang, Jincheng
Lian, Junhe
Liu, Yi
Hou, Zeran
author_facet Min, Junying
Wang, Jincheng
Lian, Junhe
Liu, Yi
Hou, Zeran
author_sort Min, Junying
collection PubMed
description Laser-assisted forming provides a perfect solution that overcomes the formability of low-ductility materials. In this study, laser-assisted robotic roller forming (LRRF) was applied to bend ultrahigh-strength steel sheet (a quenching and partitioning steel with a strength grade of 1180 MPa), and the effects of laser power density on the bending forces, springback, and bending radius of the final parts were investigated. The results show that LRRF is capable of reducing bending forces by 43%, and a compact profile with high precision (i.e., a springback angle smaller than 1° and a radius-to-thickness ratio of ~1.2) was finally achieved at a laser power density of 10 J/mm(2). A higher forming temperature, at which a significant decrease in strength is observed, is responsible for the decrease of forming forces with a laser power density of higher than 7.5 J/mm(2); another reason could be the heating-to-austenitization temperature and subsequent forming at a temperature above martensitic-transformation temperature. Forming takes place at a higher temperature with lower stresses, and unloading occurs at a relatively lower temperature with the recovery of Young’s modulus; both facilitate the reduction of springback angles. In addition, the sharp bending radius is considered to be attributed to localized deformation and large plastic strains at the heating area.
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spelling pubmed-99210202023-02-12 Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision Min, Junying Wang, Jincheng Lian, Junhe Liu, Yi Hou, Zeran Materials (Basel) Article Laser-assisted forming provides a perfect solution that overcomes the formability of low-ductility materials. In this study, laser-assisted robotic roller forming (LRRF) was applied to bend ultrahigh-strength steel sheet (a quenching and partitioning steel with a strength grade of 1180 MPa), and the effects of laser power density on the bending forces, springback, and bending radius of the final parts were investigated. The results show that LRRF is capable of reducing bending forces by 43%, and a compact profile with high precision (i.e., a springback angle smaller than 1° and a radius-to-thickness ratio of ~1.2) was finally achieved at a laser power density of 10 J/mm(2). A higher forming temperature, at which a significant decrease in strength is observed, is responsible for the decrease of forming forces with a laser power density of higher than 7.5 J/mm(2); another reason could be the heating-to-austenitization temperature and subsequent forming at a temperature above martensitic-transformation temperature. Forming takes place at a higher temperature with lower stresses, and unloading occurs at a relatively lower temperature with the recovery of Young’s modulus; both facilitate the reduction of springback angles. In addition, the sharp bending radius is considered to be attributed to localized deformation and large plastic strains at the heating area. MDPI 2023-01-23 /pmc/articles/PMC9921020/ /pubmed/36770033 http://dx.doi.org/10.3390/ma16031026 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Min, Junying
Wang, Jincheng
Lian, Junhe
Liu, Yi
Hou, Zeran
Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision
title Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision
title_full Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision
title_fullStr Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision
title_full_unstemmed Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision
title_short Laser-Assisted Robotic Roller Forming of Ultrahigh-Strength Steel QP1180 with High Precision
title_sort laser-assisted robotic roller forming of ultrahigh-strength steel qp1180 with high precision
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921020/
https://www.ncbi.nlm.nih.gov/pubmed/36770033
http://dx.doi.org/10.3390/ma16031026
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