Laser bending process of preloaded sheet metal

Abstract

Abstract. Laser bending process of preloaded sheet metal was reviewed on theoretical researches, forming experiments, numerical simulations and material performance studies of formed sheets. Considering the pre-bending platforms that used in the forming experiments can only work on few simple pre-bending types and small sized sheet metals, a large and flexible pre-bending platform was developed by authors. Experiments were done on this platform. The results of experiments showed that different prebending types lead to bending sheet metals into different curved shapes and large sized structure components of flight vehicles can be formed using this process. Based on the current research status, further developments and challenges of this process are discussed.

Power density analysis and experimental verification of shaped Gaussian laser field

“…In 2007, Shi et al[4] and others studied the temperature field of the sheet metal on the section perpendicular to the scanning line under the scanning of the fundamental mode Gaussian laser beam. In 2013, Xu et al [5] ignored the temperature difference in the thickness direction and considered convective heat transfer for the case of thin sheet metal, and obtained the instantaneous temperature field when the fundamental mode Gaussian laser beam was scanned. In 2010, Peng et al [6] established the temperature field generated by circular uniformly distributed laser irradiation on a finite-sized thin plate when studying prestressed laser bending.…”