中低功率CO2激光切割非金属板材

介绍了CO2激光汽化切割非金属板材的机理，建立了理论模型，并根据材料的性质和切割速度预测切割深度。实验数据表明，该模型适合激光切割6mm以下的薄板。根据该模型可预测小功率激光切割非金属材料的能力，为提高切割速度，提出预热辅助气体的切割方法。

Cutting of Nonmetallic Plates by Medium and Low Power Level CO2 Lasers

Various nonmetallic materials such as PMMA and wood products have been conducted by CO_2 lasers.The mechanism of evaporative CO_2 laser cutting nonmetallic plates was discussed.A theoretical model based on energy balance was presented that predicted the cutting depth with respect to material properties and cutting speed.Experimental results are found to be in good agreement with theoretical calculation.The model is applicable to laser cutting thinner plates with the thickness less than 6 mm.The ability of low power level laser cutting nonmetallic materials was analyzed by considering the theoretical model.In order to improve the cutting efficiency,a new concept of preheated gas jet laser cutting was introduced.