Effect of Cooling on Bending Angle and Microstructure in Laser Tube Bending with Circumferential Scanning

Effects of Scanning Schemes on Laser Tube Bending

Four laser scanning schemes for tube bending, including point-source circumferential scanning, pulsed line-source axial procession, and line-source axial scanning without and with water cooling are investigated in numerical simulation. The coupled thermomechanical model established using the finite element method is validated and applied to predict the bending deformation and help better unders...

The Effect of Normal Anisotropy on Thin-Walled Tube Bending

Thin-walled tube bending has common applications in the automobile and aerospace industries. The rotary-draw-bending method is a complex physical process with multi-factor interactive effects and is one of the advanced tube forming processes with high efficiency, high forming precision, low consumption and good flexibility for bending angle changes. However, it may cause a wrinkling phenomenon,...

Effects of temperature gradient magnitude on bending angle in laser forming process of aluminium alloy sheets

Laser forming is a thermal forming process which uses laser beam irradiation to produce the desired final forms. In this article, the effect of temperature gradient across  Al 6061-T6 aluminum sheets on bending angle is studied. Input parameters including laser power, scan velocity, beam diameter, and sheet thickness are the effective process parameters which influence the temperature gradient....

Numerical and experimental investigation of laser induced tube bending

Mechanisms of the process are examined to better understand the deformation characteristics such as slightly protruded shape at the intrados, wall thickness variation, cross-section ovalization, bending radius, and asymmetry. A finite element model is developed and validated by experimental observations. Factors important to characteristics of deformation are experimentally and numerically inve...

Average bending angle approach

Prediction of Bending Angle for Laser Forming of Tailor Machined Blanks by Neural Network

Tailor-made blanks are sheet metal assemblies with different thicknesses and/or materials and/or surface coatings. A monolithic sheet can be machined to make the required thickness variations that is referred as tailor machined blanks. Due to the thickness variation in tailor machined blanks, laser bending of these blanks is more complicated than monolithic plates. In this article, laser formin...