Touchless positioning using laser technology

Jacek Widlaszewski

doi:10.1117/12.520766

6 October 2003 Touchless positioning using laser technology

Jacek Widlaszewski

Proceedings Volume 5229, Laser Technology VII: Applications of Lasers; (2003) https://doi.org/10.1117/12.520766
Event: Laser Technology VII: Applications of Lasers, 2002, Szczecin, Poland

Abstract

Local heating of metal objects by means of a laser beam gives opportunity to obtain their permanent deformations in a controlled manner. Very small changes of the shape are utilized in mutual positioning of parts and subassemblies. This touch-less method has found applications in production of miniature electro-mechanical and electronic devices, entering the area of optoelectronics lately. Basic contructional solutions of support structures designed to utilize laser positioning technique are presented. The systems apply laser-induced bending deformations or contraction due to material upsetting. Bending under influence of heating by non-moving laser beam was analyzed with use of the finite element method. Steep temperature gradient on the cross-section of the object is needed to obtain permanent bending deformation in the direction of the heat source. Bending of a steel plate, 1 mm thick, was analyzed in a sequence of three cycles of heating and cooling. Time-run of the bending process resulting from the simulation is similar to those, observed in physical experiments. Precision of calculations is strongly influenced by the values of the absorption and thermal expansion coefficients.

Citation Download Citation

Jacek Widlaszewski "Touchless positioning using laser technology", Proc. SPIE 5229, Laser Technology VII: Applications of Lasers, (6 October 2003); https://doi.org/10.1117/12.520766

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