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为实现激光非垂直切割高分子材料,建立了激光非垂直切割模型。通过求解阈值能量方程,得到切缝宽度和热影响区(HAZ)宽度随激光线能量、入射角和离焦量的变化规律。在CO_2连续激光切割系统上,采用正交试验法,针对聚对苯二甲酸乙二醇酯(PET)薄膜材料进行切割试验,发现入射角在-57.3°57.3°范围内、离焦量在-1515mm范围内时,切缝宽度和HAZ宽度变化平缓,切割质量良好。结果表明,模型能够很好地预测激光非垂直切割高分子材料时的切缝宽度和HAZ宽度,为激光切割复杂曲面膜片提供了参数指导。
In order to realize laser non-perpendicular cutting of polymer materials, a non-perpendicular laser cutting model was established. By solving the threshold energy equation, the variation of kerf width and heat affected zone (HAZ) width with laser energy, incident angle and defocus amount was obtained. In the CO_2 continuous laser cutting system, the orthogonal experiment was used to cut the polyethylene terephthalate (PET) film. It was found that the incidence angle was in the range of -57.3 ° 57.3 °, In the range of 1515 mm, the kerf width and HAZ width change gently, and the cutting quality is good. The results show that the model can predict the kerf width and the HAZ width of the laser non-perpendicular cutting polymer materials, and provide the parameter guidance for the laser cutting of the complex curved patch.