CC BY
0Continuously fabricating macro/micro textures on freeform surface by optical-mechanical coupled on-the-fly five-axis laser
micromachining
J. Zhang1
1- Center for Precision Engineering, Harbin Institute of Technology, Harbin, 150001, China
zhjj505@gmail.com
While laser surface texturing is greatly needed for promoting functionalities of components and parts, how to achieve high uniformity and high precision on large area curved surface by laser surface texturing based on galvanometer is challenging, mainly due to the variant beam incidence angle with coordination evolution of laser beam. In the present work, we propose a strategy of simultaneously coupling both the galvanometer and the five-axis mechanical motion platform for laser surface texturing of large area freeform surface, which enables the constant coincidence of laser beam with ablated curved surface normal. In particular, the projection and transformation of pre-determined planar pattern on spherical surface are investigated, which are then used to derive the precise path of laser-surface interaction point. Meanwhile, a virtual prototype of the multi-axis laser milling with embedded interpolation algorithm is established. Finally, complex macro/micro patterns are continuously structured on large area freeform surface by employing the proposed multi-axis laser milling method, and subsequent characterization demonstrates both long range uniformity and local high accuracy of the fabricated patterns. Current work provides a feasible method for the continuously laser surface texturing of large area curved surfaces.
