Online measurement of the surface during laser forming

Abstract

The laser forming process is characterized by high temperature gradients and localized deformation. The process uses a laser to introduce thermal strains. The localized deformation along with the high temperature gradients is introduced iteratively which creates a complex and dynamic forming process. To understand the dynamic behavior of the process, various models have been used. A limitation of these models is that verification is commonly based on comparison with the final shape. The present work is an attempt to measure the dynamic response during laser forming. This work will present a laser forming setup for measuring the dynamic response of a v-bend. A 2D laser range scanner was used for measuring a line perpendicular to the laser heating scan path. By scanning multiple samples and changing the relative position of the 2D laser range scanner along the laser heating scan path, a surface can be generated. Analysis of the surface shows that the plate undergoes different deformation profiles during forming—this can help in understanding the changes that incur during laser forming. A case study is performed where the experimental results are compared with a state-of-the-art numerical model with good correlation between results. This shows that the measured dynamic response can be used for improved verification of numerical models of laser forming to increase confidence in the numerical results.

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Funding

Financial support for this project by the Manufacturing Academy Denmark (MADE) under work package 3 and Innovation Fund Denmark INTERLASE project number 7050-00024B is gratefully acknowledged. The experimental equipment used for this project was supported by the Poul Due Jensen Foundation. Support for the SICK Sopas interface was provided by Radoslav Darula from Aalborg University.

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Correspondence to A. N. Thomsen.

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Thomsen, A.N., Kristiansen, M., Kristiansen, E. et al. Online measurement of the surface during laser forming. Int J Adv Manuf Technol 107, 1569–1579 (2020). https://doi.org/10.1007/s00170-020-04950-6

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Keywords

  • Laser forming
  • Online measurements
  • Bending angle
  • AISI 304
  • FEM