【摘要】 为了减小激光切割碳纤维复合材料热影响区的宽度，采用响应曲面法的Box-Behnken试验设计，以激光入口处的热影响区宽度为响应，建立了激光入口处热影响区宽度的回归方程。研究了激光功率、扫描速度、辅助气体压力、焦点位置等因素以及其交互作用对响应的影响。根据回归方程和实际的切割效果优化了工艺参数。试验结果表明，激光入口处热影响区宽度影响因素的重要程度依次为激光功率、扫描速度、焦点位置、辅助气体压力。最佳工艺参数为激光功率170 W、扫描速度1.5 m/min、辅助气体压力为0.6 MPa，焦点置于试件上表面。对最佳工艺参数进行试验验证，结果表明，激光入口处热影响区宽度为486.13μm，回归方程的预测平均误差为5.3%。更多还原

【Abstract】 To minimize the heat-affected zone(HAZ) width in laser-cut carbon fiber composites, the Box-Behnken experimental design was employed using the response surface method to establish a regression equation for the HAZ width at the laser entrance. The effects of laser power, scanning speed, auxiliary gas pressure, focus position, and their interactions on the response surface were investigated. The process parameters were optimized based on the regression equation and actual cutting results. The experimental results show that the laser power, scanning speed, focus position,and auxiliary gas pressure are the most important factors affecting the HAZ width at the laser inlet. The optimal process parameters are a laser power of 170 W, a scanning speed of 1. 5 m/min, an auxiliary gas pressure of 0. 6 MPa, and a focus on the upper surface of the specimen. The experimental results show that the HAZ width at the laser inlet was 486. 13 μm,with an average error of 5. 3% for the regression equation.更多还原