Energy consumption and process characteristics of picosecond laser de-coating of cutting tools

JOURNAL OF CLEANER PRODUCTION

卷:290

Article

Ouyang, Jinglei¹  Mativenga, Paul T.¹  Liu, Zhu²  Li, Lin¹ 

[1] Univ Manchester, Sch Engn, Dept Mech Aerosp & Civil Engn, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Sch Nat Sci, Dept Mat, Manchester M13 9PL, Lancs, England

关键词: Laser;    Cleaning;    Tool;    Coating;    Carbon footprint;    Energy demand;    Circular economy;   

DOI  :  10.1016/j.jclepro.2021.125815

来源: Elsevier

【 摘 要 】

Laser de-coating is a promising technology for selective coating removal to facilitate reuse of coated tools in a circular economy. It is timely to understand and optimise the quality, energy requirements and environmental footprint of the laser de-coating process. This paper reports on an investigation into process characteristics, energy demands and carbon footprints in coating removal from tungsten carbide tool inserts using high power picosecond laser sources with different pulse widths and wavelengths. The results demonstrate that although the 355 nm wavelength, 10 ps pulse width laser, has higher processing efficiency in terms of production rates, and lower specific energy for laser beam and material interaction, and results in better surface quality, the overall laser system energy consumption is much higher than that of using the 1064 nm wavelength, 150 ps pulse width laser for the removal of coatings on tungsten carbide cutting tools. This is largely due to the high energy demand of the water cooling system needed for the 355 nm wavelength picosecond laser whilst the 1064 nm ps is air cooled. There is therefore a need to optimise the total system energy consumption in the 355 nm ps laser, to support its superior laser de coating performance. The paper shows the importance and challenges of optimising the energy consumption at different system boundaries. (c) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

【 授权许可】

Free