Open Access

ARTICLE

Experimental Study on Inert Gas-assisted Laser Cut Veneer Based on LOM

Qingwei Liu^1,2, Chunmei Yang^1,2,*, Qian Miao^1,2, Yifan Liu^1,2, Jiuqing Liu^1,*, Wenji Yu³

1 College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, 150040, China
2 Forestry and Woodworking Machinery Engineering Technology Center, Northeast Forestry University, Harbin, 150040, China
3 Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China

* Corresponding Authors: Chunmei Yang. Email: ; Jiuqing Liu.

(This article belongs to the Special Issue: Polymeric Composites Based on Sustainable Technologies and Renewable Materials)

Journal of Renewable Materials 2020, 8(12), 1681-1689. https://doi.org/10.32604/jrm.2020.012031

Received 11 June 2020; Accepted 14 July 2020; Issue published 12 November 2020

Abstract

Based on the LOM (Laminated Object Manufacturing) process, an inert gas-assisted laser method for wood cutting was proposed. The carbonization degree of wood surface was improved by the introduction of helium (He) gas, and the influence of process parameters on the carbonization layer of wood surface was solved, it was significance to reduce the post-processing of LOM and improve the quality of forming workpiece. The cherry wood veneer was used as the experimental material, under the condition of the same process parameters, the wood was cut with or without inert gas-assisted, and the influence factors of kerf quality were studied by variance analysis. The results showed that under the same condition, compared with traditional laser processing, the kerf width was obviously reduced in the inert gas-assisted cutting. Because the He gas had oxygen-isolation and flame retardant effect, which prevented heat accumulation and conduction. The micro morphology of the kerf surface showed that the flatness was better in the inert gas-assisted cutting. As the excess heat was blown out by the cooling and purging of the gas, the phenomenon of oxidation and burning was reduced, the range of HAZ (heat affected zone) was reduced, and the carbonization phenomenon was obviously improved. The surface quality of kerf was improved effectively. According to the analysis of variance, in addition to the effect of laser power, cutting speed and inert gas flow on the cutting width, the interaction between inert gas flow and laser power, laser power and cutting speed were also the main factors which affected the cutting width. The feasibility of the combined inert gas and laser processing to improve wood cutting quality has been verified through experimental research, which provided a certain reference for the followup research on improving the wood processing quality

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