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<p>This study examines the influence of laser power and cutting speed on the morphological characteristics of medium-density fibreboard (MDF) during CO₂ laser cutting. Experimental trials were performed on 6&#xa0;mm MDF panels under systematically varied process parameters, and morphological outcomes were evaluated using scanning electron microscopy (SEM). The primary response variables included kerf width (Kw), kerf depth (Kd), cutting depth (Cd), and the heat-affected zone (HAZ). Results showed that increasing laser power enlarged Kw and intensified thermal degradation, while cutting depth peaked at mid-range power levels before declining due to beam attenuation and material accumulation. Conversely, higher cutting speeds reduced kerf expansion and minimized HAZ, yielding smoother and more precise cuts. Statistical analysis confirmed that power significantly affected Kw, Cd, and HAZ, whereas Kd was primarily sensitive to speed variations. The optimal balance was achieved at moderate power (60%) and higher cutting speeds (75–100&#xa0;mm/s), which minimized carbonization while maintaining sufficient penetration. These findings provide practical guidelines for optimizing CO₂ laser cutting of MDF, contributing to efficient, precise, and sustainable manufacturing with reduced postprocessing needs.</p>

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Effects of power and speed parameters on the morphological properties of MDF boards in the laser cutting process

  • 期刊论文

  • 发表日期：

    2025年11月15日

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摘要

This study examines the influence of laser power and cutting speed on the morphological characteristics of medium-density fibreboard (MDF) during CO₂ laser cutting. Experimental trials were performed on 6 mm MDF panels under systematically varied process parameters, and morphological outcomes were evaluated using scanning electron microscopy (SEM). The primary response variables included kerf width (Kw), kerf depth (Kd), cutting depth (Cd), and the heat-affected zone (HAZ). Results showed that increasing laser power enlarged Kw and intensified thermal degradation, while cutting depth peaked at mid-range power levels before declining due to beam attenuation and material accumulation. Conversely, higher cutting speeds reduced kerf expansion and minimized HAZ, yielding smoother and more precise cuts. Statistical analysis confirmed that power significantly affected Kw, Cd, and HAZ, whereas Kd was primarily sensitive to speed variations. The optimal balance was achieved at moderate power (60%) and higher cutting speeds (75–100 mm/s), which minimized carbonization while maintaining sufficient penetration. These findings provide practical guidelines for optimizing CO₂ laser cutting of MDF, contributing to efficient, precise, and sustainable manufacturing with reduced postprocessing needs.