Implications of using two low-power continuous-wave lasers for polishing  

作　　者：Wenxuan Zhang Kiwan Wong Miguel Morales Carlos Molpeceres Craig B Arnold 

机构地区：[1]Department of Chemical and Biological Engineering,Princeton University,Princeton,NJ 08544,United States of America [2]Princeton Institute for the Science and Technology of Materials,Princeton University,Princeton,NJ 08544,United States of America [3]Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Hong Kong [4]Centro Laser UPM,Universidad Politecnica de Madrid,Alan Turing 1,28031,Madrid,Spain [5]Department of Mechanical and Aerospace Engineering,Princeton University,Princeton,NJ 08544,United States of America

出　　处：《International Journal of Extreme Manufacturing》2020年第3期174-182,共9页极端制造（英文）

基　　金：This study was supported by Princeton University Eric and Wendy Schmidt Transformative Technology Fund.This simulation was funded by Comunidad de Madrid Project ADITIMAT-CM(S2018/NMT-4411);Universidad Politecnicade Madrid Research Grant(EST-PDI-19-A1JMBI-26-T4MNY9).The authors also want to thank Luc Deike for valuable discussions.The authors acknowledge the use of Princeton's Imaging and Analysis Center,which is partially supported by the Princeton Center for Complex Materials,a National Science Foundation(NSF)MRSEC program(DMR-1420541),for the SEM image acquisition.

摘　　要：Laser polishing is widely employed to reduce the surface roughness of products with complex geometries.Traditional laser polishing techniques use a single high-power Gaussian beam to melt and smooth a thin layer of surface material.However,the reliance on high power lasers can present practical challenges such as minimizing surface evaporation or reducing overall cost.In this work,we combined two identical low-power laser beams with a spatial offset in between them to construct an elliptical beam.By changing the spatial offset,combined beams with different lengths along the major axis can be created.We observe over 20%improvement in line roughness reduction using this approach compared to a single Gaussian laser beam with the same total power.Additionally,both experiment and simulation results suggest such improvement is because this dual-laser set-up can create a longer molten pool compared to a single laser.

关 键 词：laser polishing surface roughness dual lasers LOW-POWER 

分 类 号：TN249[电子电信—物理电子学]