Review: Comparative analysis of CO2 laser and conventional sawing for cutting of lumber and wood-based materials

Martínez-Conde, Alejandro; Krenke, Thomas; Frybort, Stephan; Müller, Ulrich

doi:10.1007/s00226-017-0914-9

Cited by 23 publications

(12 citation statements)

References 19 publications

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“…Based on the principle of physical damping, the gas with a certain pressure (P1) and velocity was sprayed around the laser beam, and the static and unpressurized oxygen in the air was extruded from the periphery of the nozzle. The residual concentration did not support combustion and blocked the absorption of oxygen in the high temperature area of the workpiece surface, forming a specific gas isolation layer (Martínez-Conde et al 2017). The subsequent experiments yielded the expected results.…”

Section: Principle Of Gas-guided Laser Machiningmentioning

confidence: 83%

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

Yang

Xue

et al. 2020

BioRes

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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.

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Section: Principle Of Gas-guided Laser Machiningmentioning

confidence: 83%

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

Yang

Xue

et al. 2020

BioRes

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“…The ability to predict the intensity of this change in advance is one of the key areas of laser engraving quality control. A number of publications deal with the impact of laser power intensity on the resulting change of an engraved material (Pagano et al 2009;Eltawahni et al 2013;Hernández-Castañeda et al 2011;Martinez-Conde et al 2017). However, the shade created by the impact of a laser beam on wood does not depend only on the intensity (the power) and the profile of the laser beam (the cross-section).…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays the engraving of photographs into wood is performed mainly on a CO 2 laser. CO 2 lasers have high power, so they allow high production speeds and material cutting (Martinez-Conde et al 2017). However, they generate longer wavelengths (10,600 nm), so they are not as accurate as the diode layers of a visible spectrum (455 nm) (Rothenbach and Gupta 2012).…”

Section: Introductionmentioning

confidence: 99%

Laser beam calibration for wood surface colour treatment

Jurek

Wagnerova

2021

Eur. J. Wood Prod.

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Laser engraving of photographs on wood surfaces is a challenging task. To optimize the outcome and production quality it is necessary to control every aspect of the laser engraving process. Most of the production machines and technologies overall are mainly focused on laser power control. However, with other systems and deeper knowledge of the wood characteristics it is possible to achieve even better quality. This paper deals with enlarging the number of achievable shades of burned wood and its optimization. A calibration system was developed to control colour shades of engraved wood with a combination of laser power and optic focus. With this approach it is possible to widen achievable palette of engraved shades by continuous control of chemical processes of laser and wood interaction. The production is divided into wood burning and wood carbonization by variation of laser beam focus.

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“…Among them one can distinguish, research in the basic strength of materials field (bending, twisting, compression, tension, surface pressure) and dynamic tests (Nassef et al 2018). Researchers also have considered: determination of the modulus of elasticity (Cetera et al 2018;Bakhta et al 2020), internal bond characteristics (Cetera et al 2018), impact of water (swelling) (Cetera et al 2018;Bakhta et al 2020), moisture absorption (Trochonowicz and Galas 2018), impact of thermal treatment (Cetera et al 2018), impact of type of removal machining on processed materials (Martínez-Conde et al 2017), formaldehyde emission during drying (Cetera et al 2018), and acoustic emission during machining (Eschelbacher et al 2019). However, there has been a lack of material properties description affecting the cutting force during shredding of wood-based waste.…”

Section: Introductionmentioning

confidence: 99%

Wood-based boards mechanical properties and their effects on the cutting process during shredding

Kukla

Warguła

2021

BioRes

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In order to design effective shredding machines dedicated to shredding wood-based waste, information about the mechanical properties of materials subjected to shredding is necessary. A number of mechanical properties of particleboard, oriented strand boards, and medium-density fibreboards in the aspect of shredding process have been experimentally determined in the article. The influence of material type, blade geometries, and cutting depth on cutting force and elasticity coefficient were analysed. Blade geometries reflect different phases of rotation of the cylindrical wood chipper’s knife. It has been shown that a knife with the most favourable geometry is characterized by the lowest values of the stiffness coefficient for each of the materials. This is the geometry of the cylindrical wood chipper’s knife exactly halfway into the cutting process. By contrast, the least favourable geometry is characterized by a knife corresponding to the beginning of the cutting process. Among the tested materials, the medium density board requires the most energy to change its structure, and the laminated particleboard requires the least. The presented results can be a set of input data necessary to model the work required to implement the cutting process, but also enable validation of existing cutting models.

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Review: Comparative analysis of CO2 laser and conventional sawing for cutting of lumber and wood-based materials

Cited by 23 publications

References 19 publications

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

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

Laser beam calibration for wood surface colour treatment

Wood-based boards mechanical properties and their effects on the cutting process during shredding

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