Magnetic-Force-Assisted Straightening of Bent Mild Steel Strip by Laser Irradiation

Dutta, Parama; Kalita, Karuna; Dixit, Uday S.; Liao, Hengcheng

doi:10.1007/s40516-017-0047-x

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…Shi et al [51] proposed a method consisting of applying two unequal concentrated forces, which reduce the edge effect up to 80% in comparison to the pure laser bending process. In a recent trial, the electromagnetic force is used for force assisted laser bending [52,53]. The electromagnetic force is a non-contact tool that can bend the sheet more precisely by controlling the electric current and air gap between the electromagnet and sheet.…”

Section: Force Assisted Laser Bendingmentioning

confidence: 99%

Recent Advances in the Laser Forming Process: A Review

Safari

Sousa

Joudaki

2020

Metals

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Laser forming is an emerging manufacturing process capable of producing either uncomplicated and complicated shapes by employing a concentrated heating source. The heat source movement creates local softening, and a plastic strain will be induced during the rise of temperature and the subsequent cooling. This contactless forming process may be used for the simple bending of sheets and tubes or fabrication of doubly-curved parts. Different studies have been carried out over recent years to understand the mechanism of forming and predicting the bending angle. The analysis of process parameters and search for optimized manufacturing conditions are among the most discussed topics. This review describes the main recent findings in the laser forming of single and multilayer sheets, composite and fiber-metal laminate plates, force assisted laser bending, tube bending by laser beam, the optimization technique implemented for process parameters selection and control, doubly-curved parts, and the analytical solutions in laser bending. The main focus is set to the researches published since 2015.

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Section: Force Assisted Laser Bendingmentioning

confidence: 99%

Recent Advances in the Laser Forming Process: A Review

Safari

Sousa

Joudaki

2020

Metals

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“…In this study, the workpiece is clamped at one end and a magnet is placed at the other end to generate a straightening force. A laser is used to heat the bending point [17,18]. This method is only suitable for thinner workpieces.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Form of a Hardened Metal Workpiece during the Straightening Process

et al. 2023

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In industry, metal workpieces are often heat-treated to improve their mechanical properties, which leads to unwanted deformations and changes in their geometry. Due to their high hardness (60 HRC or more), conventional bending and rolling straightening approaches are not effective, as a failure of the material occurs. The aim of the research was to develop a predictive model that predicts the change in the form of a hardened workpiece as a function of the arbitrary set of strikes that deform the surface plastically. A large-scale laboratory experiment was carried out in which a database of 3063 samples was prepared, based on the controlled application of plastic deformations on the surface of the workpiece and high-resolution capture of the workpiece geometry. The different types of input data, describing, on the one hand, the performed plastic surface deformations on the workpieces, and on the other hand the point cloud of the workpiece geometry, were combined appropriately into a form that is a suitable input for a U-Net convolutional neural network. The U-Net model’s performance was investigated using three statistical indicators. These indicators were: relative absolute error (RAE), root mean squared error (RMSE), and relative squared error (RSE). The results showed that the model had excellent prediction performance, with the mean values of RMSE less than 0.013, RAE less than 0.05, and RSE less than 0.004 on test data. Based on the results, we concluded that the proposed model could be a useful tool for designing an optimal straightening strategy for high-hardness metal workpieces. Our results will open the doors to implementing digital sustainability techniques, since more efficient handling will result in fewer subsequent heat treatments and shorter handling times. An important goal of digital sustainability is to reduce electricity consumption in production, which this approach will certainly do.

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