Study on Surface Quality of Wood Processed by Water-jet Assisted Nanosecond Laser

Yang, Chunmei; Jiang, Tongmin; Yu, Yueqiang; Dun, Guoqiang; Ma, Yan; Liu, Jiuqing

doi:10.15376/biores.13.2.3125-3134

Cited by 10 publications

(8 citation statements)

References 7 publications

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“…This technology combines the nanosecond laser technology with the water jet cooling technology, and makes use of the difference of optical characteristics when light propagates in water and air, so as to achieve the guidance and broken line transmission of laser beam in the water jet. During the processing, the water jet is used as an optical fiber to transmit the laser to the surface of the work piece, and remove excess heat and residue on the surface of the work piece during processing, so as to clean and tidy the kerf, and solve some disadvantages of traditional laser processing [ 13 , 14 ]. High-speed water jet plays an important role in this technology.…”

Section: Introductionmentioning

confidence: 99%

Research on the Mechanism of Micro-Water Jet-Guided Laser Precision Drilling in Metal Sheet

2021

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As the microporous structure has been widely used in the field of precision machining, at the same time, the requirements for the quality of microporous machining are continuously increasing. Water jet-guide laser processing technology (WJGL) has been gradually applied for its high machining precision. However, there are a few researches on the heat conduction process of WJGL processing metal materials. Therefore, it is of great significance to study the transient thermal effect of metal materials and the mechanism of material removal to improve the processing quality. In order to explore the heat conduction model of WJGL processing metal materials, this paper is based on the “element birth and death” technique in the finite element method, and the three-dimensional transient temperature field of four typical metal materials (titanium alloy, stainless steel, aluminum alloy, copper) and material removal model are established. Under this model, the removal mechanism of different metal materials and the influence of different process parameters on the temperature field distribution of the material are studied, and the influence of fixed-position drilling and helix drilling on the microporous morphology is compared. The results show that copper and aluminum alloys can obtain a larger depth-to-diameter ratio and a smaller hole taper. Titanium alloy and stainless steel have better hole roundness, lower hole edge temperature, and smaller thermal deformation. Hole roundness error and hole taper decrease with the increase of laser power. The roundness error of each material is reduced to within 10 μm when the laser power is 10 W, and the average hole taper is 8.73°.

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Section: Introductionmentioning

confidence: 99%

Research on the Mechanism of Micro-Water Jet-Guided Laser Precision Drilling in Metal Sheet

2021

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“…It was concluded that laser power and cutting speed are the main factors that affect the width of the wood kerf (Hernández-Castañeda et al 2011). Yang et al (2018) proposed the water-jet assisted YAG laser processing of Korean pine, and the water-jet pushed away the residues on the cutting surface to improve the surface quality of the processing area. Subsequently, the mechanism of wood processing assisted by YAG laser with water-jet was studied and good processing results were achieved (Yang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Dynamic evolution simulation of ablation zone in water-jet assisted laser machining of Korean pine (Pinus koraiensis)

Wang

Yan

Jiang

et al. 2022

BioRes

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In order to solve the difficulties with the observation of the ablation zone and the many factors that affect the dynamic evolution process of the ablation zone, the structural morphology and dynamic evolution process of the ablation zone in the process of water-jet assisted laser machining Korean pine (Pinus koraiensis) were studied. Based on the DFLUX subprogram, a compound heat source model was established. Under the comprehensive consideration of heat conduction, heat convection, heat radiation, and thermal physical properties varying with temperature, the three-dimensional (3D) finite element model of the Korean pine was numerically simulated by water-jet assisted laser machining. Through numerical simulation analysis, the cross-sectional morphology of Korean pine kerf was found to be screw-shaped, and the experimental results were in good agreement with the simulation results. The dynamic evolution law of water-jet assisted laser machining of Korean pine was obtained. In addition, as the laser power increased and the cutting speed decreased, the morphology of the Korean pine kerf remained unchanged, but the structure size of the Korean pine kerf showed an increasing change.

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“…Polak et al [68] used ANSYS and the numerical finite element method to model the radiation beam cutting and drilling process. Yang et al [69,70] analyzed the influence of the ablative mechanism of wood processed with a nanosecond laser on the cutting quality and established a prediction model through multiple linear regression equations. Hardalov et al [71] used the finite element method in their work to quantify the temperature gradient on the surface of ceramic material in the process of irradiation with pulsed and continuous beams using FEMLAB software.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Parameters for the Cutting of Wood-Based Materials by a CO2 Laser

et al. 2020

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This article deals with the laser cutting of wood and wood composites. The laser cutting of wood and wood composites is widely accepted and used by the wood industry (due to its many advantages compared to, e.g., saw cutting). The goal of this research was to optimize the cutting parameters of spruce wood (Pices abies L.) by a low-power CO2 laser. The influence of three factors was investigated, namely, the effect of the laser power (100 and 150 W), cutting speed (3, 6, and 9 mm·s−1), and number of annual rings (3–11) on the width of the cutting kerf on the top board, on the width of the cutting kerf on the bottom board, on the ratio of the cutting kerf width on the top and bottom of the board, on the width of the heat-affected area on both sides of the cutting kerf (this applies to the top and bottom of the board), and on the degree of charring. Analysis of variance (ANOVA) and correlation and regression analysis were used for developing a linear regression model without interactions and a quadratic regression model with quadratic interactions. Based on the developed models, the optimization of parameter settings of the investigated process was performed in order to achieve the final kerf quality. The improvement in the quality of the part ranged from 3% to more than 30%. The results were compared with other research dealing with the laser cutting of wood and wood composites.

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Study on Surface Quality of Wood Processed by Water-jet Assisted Nanosecond Laser

Cited by 10 publications

References 7 publications

Research on the Mechanism of Micro-Water Jet-Guided Laser Precision Drilling in Metal Sheet

Research on the Mechanism of Micro-Water Jet-Guided Laser Precision Drilling in Metal Sheet

Dynamic evolution simulation of ablation zone in water-jet assisted laser machining of Korean pine (Pinus koraiensis)

Optimization of Parameters for the Cutting of Wood-Based Materials by a CO2 Laser

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