As laser cutting is a complicated process, characterizing the kerf surface morphology is essential to gain deep insight into the mechanism of laser cutting wood, and exploring an appropriate combination of processing parameters is also of great necessity to realize higher efficiency and greater yield. In this work, the cutting of pine wood (Picea jezoen, s—sCalx.) with a CO₂ laser was studied. The morphology and processing-induced defects for the kerf surface were characterized to investigate the mechanism for the laser cutting of wood. Analysis of variance and the significant contribution of each parameter were adopted to explore the effects of processing parameters on kerf depth and width. The results show that processing-induced defects such as goosebump-like morphology, striations, charring and debris can be observed on the kerf surface. The cutting-off mechanism is the result of the combined action of the laser beam and gas jet. The typical kerf is V-shaped. However, the variation in structure and density between earlywood and latewood will result in an irregular shape. A better cutting effect for a higher efficiency can be achieved by cutting wood with a lower moisture content at a lower speed in parallel to the fiber direction, and a greater yield can be achieved by cutting wood with a higher moisture content at a higher speed in parallel to the fiber direction. This work provides deep insight into the mechanism for laser cutting wood and reveals that CO₂ lasers show great potential to cut wood.

由于激光切割是一个复杂的过程，刻痕表面形态的表征对于深入了解激光切割木材的机理至关重要，探索加工参数的适当组合对于实现更高的效率和更高的产量也非常必要。在这项工作中，用CO ₂切割松木（Picea jezoen，s-sCalx。）。研究了激光。对切​​口表面的形貌和加工引起的缺陷进行了表征，以研究激光切割木材的机理。采用方差分析和每个参数的显着贡献来探讨加工参数对切缝深度和宽度的影响。结果表明，在切缝表面上可以观察到加工引起的缺陷，如鸡皮-样的形态，条纹，炭化和碎屑。截止机制是激光束和气体射流共同作用的结果。典型的切口是V形的。但是，早材和晚材之间结构和密度的变化将导致形状不规则。通过在平行于纤维方向的较低速度下以较低的速度切割水分含量较低的木材，可以获得更好的切割效果，从而获得更高的效率；而在较高的速度下，通过以较高的速度切割水分含量较高的木材，可以获得更高的产量。平行于纤维方向。这项工作提供了对激光切割木材的机制的深刻见解，并揭示了CO_2台激光器显示出巨大的切割木材的潜力。