Repeatability of Sheet Material Formation Results and Interchangeability of Processing Modes at Multi-Pass Laser Formation

Abstract:

Laser shaping of sheet materials is a flexible process and is carried out without force contact on the material, it allows forming, among other things, brittle, elastic and difficult-to-deformed materials. It is known that the main parameters of laser shaping are the beam power, the size of the focus zone and the speed of beam movement along the surface of the workpiece, however, the range of variation of these parameters is not unlimited, but due to the characteristics of a particular equipment. Therefore, it is necessary to develop an approach to selecting processing modes that can be selected from the range available on the equipment and at the same time obtain a predictable result. There is also a need to investigate a reproducibility of laser shaping results with a lot of pass-through processing. Actually, this study is aimed at solving these issues. In particular, the article formulates a provision on complex formation parameters that allow determining interchangeable modes of laser molding processing and varying parameters in ranges available on equipment. For this, the basic processing mode was chosen, formation was carried out with a fixed number of passes, after which, using complex parameters, alternative modes were determined and formation was carried out under these conditions with the same number of passes. The article also presents the methodology and results of experimental studies of checking the interchangeability of formation modes and the repeatability of formation results during processing along parallel and multi-directional trajectories. It was experimentally found that the deviation of the strain value obtained in alternative modes, compared to the base, and did not exceed 2.46% for a three-pass cycle and 5.8% - for a nine-pass cycle. And the repeatability of the formation results during laser shaping is quite high; the discrepancy in the deformation value did not exceed 5%, and, preferably, was lower.

• Periodical: Materials Science Forum (Volume 1038)
• Pages: 15-24
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1038.15
• Online since: July 2021
• Authors: Oleksii Kaglyak, Bohdan Romanov, Kateryna Romanova*, Oksana Myrgorod, Artem Ruban, Viktoriia Shvedun
• Keywords: Laser Shaping, Laser Surface Treatment, Residual Stresses

References

[1] Thomsen A. N. M. Kristiansen, E. Kristiansen, B. Endelt Online measurement of the surface during laser forming. The International Journal of Advanced Manufacturing Technology (2020) 107:1569–1579.

DOI: 10.1007/s00170-020-04950-6

[2] Kaglyak, O.D., Golovko, L.F. and Goncharuk, O.O. (2009). Lazerne formoutvorennya prostorovych metalevych konstrukcij [Laser shaping of spatial metal structures]. East European Journal of Advanced Technologies, 6/1(42), 4-11.

[3] GeigerM(1994) CIRP Annals 43(2):563.

[4] Vollertsen F, Komel I, Kals R (1995) Model Simul Mater Sci Eng 3(1):107.

[5] Vollertsen F. Mechanisms and Models for Laser Forming. Lasaer Assisted Net Shape Engineering. Proceedings of the LANE'94. 1994. Vol.1; pp: 345-360.

[6] Magee J., Watkins K.G., Steen W.M. Edge Effects in Laser Forming. Laser Assisted Net Shape Engineering 2, Proceedings of LANE'97, 1997. Meisenbach Bamberg. pp:399-406.

[7] Kaglyak, O.D., Golovko, L.F., Goncharuk, O.O. and Lutaj, A.M. (2012). Osoblyvosti lazernogo formoutvorennya lystovych materialiv [Features of laser formation of sheet materials]. East European Journal of Advanced Technologies, 2/13(56), 32-40.

[8] Cheng J., Yao Y. Micorstructure Integrated Modeling of Multiscan Laser Forming. Journal of Manufacturing Science and Engineering. 2002. Vol. 124; pp.379-387.

DOI: 10.1115/1.1459088

[9] Cheng J., Yao Y. Cooling Effects in Multiscan Laser Forming. Journal of Manufacturing Process. 2001. Vol. 3(1); pp:60-72.

[10] Vollertsen F. Models for Laser Forming Process. Lasaer Assisted Net Shape Engineering. Proceedings of the LANE'96. 1996. Vol.1; pp: 324-335.

[11] Magee J., Watkins K.G., Steen W.M. Advances in laser forming. Journal of Laser Application 10 (1998) 235–246.