Simulation and Experimental Study on Continuous Wave Fiber Laser Removal of Epoxy Resin Paint Film on the Surface of 6061 Aluminum Alloy

Author:

Li Yahui1,Li Jingyi1,Dong Hang1,Zhang Wei1,Jin Guangyong12

Affiliation:

1. Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physical Sciences, Changchun University of Science and Technology, Changchun 130022, China

2. School of Electrical and Electronic Engineering, Changchun University of Technology, Changchun 130012, China

Abstract

Paint removal is an essential process in the industrial field. Laser technology provides an effective method of paint removal to replace traditional mechanical and chemical methods. This paper establishes a continuous wave (CW) laser thermal paint removal model based on heat conduction theory and Arrhenius’ law. The paint stripping process of epoxy paint film on the surface of 6061 aluminum alloy via CW laser was studied through simulation and experiment. We found that the carbonization of the paint film during the CW laser paint removal process will inhibit the laser paint removal process. Therefore, the paint removal efficiency of the CW laser is limited. The depth of CW laser paint removal increases linearly with the CW laser power density. However, during the CW laser paint removal process, due to the pyrolysis of the paint film and the reflection of the laser by the substrate, the surface temperature of the material first increases and then decreases. In addition, after laser paint removal, the surface roughness of the material after paint removal is reduced due to the melting of the base material. The model established in this article can provide a theoretical reference for studying the CW laser paint removal process.

Funder

National Natural Science Foundation of China

Changchun Science and Technology Development Plan

Jilin Provincial Department of Education Science and Technology Research

Publisher

MDPI AG

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