UV laser machining of wood

Fukuta, Satoshi; Nomura, Masaki; Ikeda, Takeshi; Yoshizawa, Masaki; Yamasaki, Mariko; Sasaki, Y.

doi:10.1007/s00107-016-1010-9

Cited by 23 publications

(18 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The partial density variation of cedar and larch is large because of the effect of annual rings. All machining was conducted on early wood: density was measured for each segment of early wood cut out, with the air-dried density of the cedar and larch being 0.31 and 0.35 g/cm 3 , respectively. The machining area was not limited for the beech, and the air-dried density of the beech was 0.62 g/cm 3 .…”

Section: Wood Specimensmentioning

confidence: 99%

“…All machining was conducted on early wood: density was measured for each segment of early wood cut out, with the air-dried density of the cedar and larch being 0.31 and 0.35 g/cm 3 , respectively. The machining area was not limited for the beech, and the air-dried density of the beech was 0.62 g/cm 3 . All specimens were collected with end matching in the grain direction, and all were air-dried specimens having around 10 % moisture content.…”

Section: Wood Specimensmentioning

confidence: 99%

“…Meanwhile, in our previous research [3], we attempted wood machining using a type of short-wavelength laser, ultraviolet (UV) lasers, specifically, third-harmonic-generation Nd:YLF laser and Nd:YVO 4 laser (wavelengths 349 and 355 nm, respectively), and collected basic performance data. In practical terms, when we performed cutting, hole-drilling and then incising at the drilling site, we observed the superiority and effectiveness of these lasers: we were able to conduct precise cutting with little heat effect, as well as hole-drilling with an extremely high aspect ratio, in a relatively short machining time.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wavelength dependence of machining performance in UV-, VIS- and NIR-laser cutting of wood

Fukuta¹,

Nomura²,

Ikeda

et al. 2016

J Wood Sci

Self Cite

View full text Add to dashboard Cite

Cutting of wood using short-wavelength (266-, 355-, 532-, and 1064-nm) lasers was carried out and wavelength dependence in relation to machining performance and post-processing appearance was investigated. We found that a 355-nm-wavelength laser achieves the greatest machining performance. The variation in machining performance between different wavelengths was due to the different light absorptances of the woods: when we measured the spectral reflectance of the woods, we found that the greater the machining performance for a wavelength, the lower its reflection of light (and thus the greater its absorption). Assuming that the absorption of ultraviolet wavelength of 355 nm by wood is due to lignin, a lignin-free cellulose board was prepared for further investigation, and the same machining and measurements were conducted. The results showed that machining progresses well via the absorption of laser light by lignin at the ultraviolet wavelength of 355 nm. On the other hand, when this cellulose board was impregnated with phenolic resin, there was high absorption of light between the ultraviolet range and wavelengths near 600 nm, machining progressed well at wavelengths of 355 and 532 nm.

show abstract

Section: Wood Specimensmentioning

confidence: 99%

Section: Wood Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wavelength dependence of machining performance in UV-, VIS- and NIR-laser cutting of wood

Fukuta¹,

Nomura²,

Ikeda

et al. 2016

J Wood Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…Laser processing is a non-contact processing method in which a high-power density laser beam irradiates the workpiece and makes it instantly gasify to facilitate drilling, cutting, welding, and other special processing (Naderi et al 1999;Hovikorpi et al 2004;Li et al 2018). Wood has good laser absorption, but the issue of wood surface burning during processing impedes the application of lasers in wood processing (Martin et al 2005;Fukuta et al 2016;Alejandro et al 2017). At the same time, due to serious carbonization phenomenon, the surface roughness was increased, which affected the physical properties and visual beauty of wood (Gaff et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Processing technology and experimental analysis of gas-assisted laser cut micro thin wood

Yang

Xue

et al. 2020

BioRes

View full text Add to dashboard Cite

Unsupported combustion nitrogen (N2) and flame-retardant helium (He) were used to facilitate laser-cutting of cherry wood, and the effects of process parameters, gas flow, and gas reactivity on the surface quality of thin wood were studied. Using identical processing parameters, the cherry wood was laser-cut with and without the added gases. Through comparing the cutting width, heat affected zone (HAZ), and surface burning conditions under different gas-assistance conditions, the influence of the added gases on the gasification and combustion of cherry wood was analyzed. When N2 gas was used, the cutting width was less than that of laser direct cutting, but the surface of the burning area did not remarkably improve. Under the same conditions, when He gas was added, the burning areas on both sides of the kerf were remarkably reduced and the consistency of kerf was good. This indicated that He gas had good oxygen isolation and flame-retardant effects. The surface of the kerf was observed with a scanning electron microscope, and addition of He gas remarkably improved the burning that occurred when cutting kerf. This study combined gas processing and laser technology, and it provided technical references for reducing post treatment improving the surface quality of laser-processed wood.

show abstract

“…UV laser irradiation is reported as a method to open the machined wood surface for glue or coating agents [ 37 ]. Recent experiments with a UV laser and pulse duration of a few nanoseconds showed no change in the texture of wood although heat accumulation of the laser pulses can lead to carbonization [ 38 ]. In [ 39 ], the low heat influence of a nanosecond laser has been attributed to photochemical decomposition, which leads to an ablation-like material removal when using UV wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser machining for characterization of local mechanical properties of biomaterials: a case study on wood

Jakob

Pfeifenberger

Hohenwarter

et al. 2017

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

The standard preparation technique for micro-sized samples is focused ion beam milling, most frequently using Ga+ ions. The main drawbacks are the required processing time and the possibility and risks of ion implantation. In contrast, ultrashort pulsed laser ablation can process any type of material with ideally negligible damage to the surrounding volume and provides 4 to 6 orders of magnitude higher ablation rates than the ion beam technique. In this work, a femtosecond laser was used to prepare wood samples from spruce for mechanical testing at the micrometre level. After optimization of the different laser parameters, tensile and compressive specimens were produced from microtomed radial-tangential and longitudinal-tangential sections. Additionally, laser-processed samples were exposed to an electron beam prior to testing to study possible beam damage. The specimens originating from these different preparation conditions were mechanically tested. Advantages and limitations of the femtosecond laser preparation technique and the deformation and fracture behaviour of the samples are discussed. The results prove that femtosecond laser processing is a fast and precise preparation technique, which enables the fabrication of pristine biological samples with dimensions at the microscale.

show abstract

UV laser machining of wood

Cited by 23 publications

References 6 publications

Wavelength dependence of machining performance in UV-, VIS- and NIR-laser cutting of wood

Wavelength dependence of machining performance in UV-, VIS- and NIR-laser cutting of wood

Processing technology and experimental analysis of gas-assisted laser cut micro thin wood

Femtosecond laser machining for characterization of local mechanical properties of biomaterials: a case study on wood

Contact Info

Product

Resources

About