氧助散焦激光切割厚板的稳态工作条件  

Steady-state conditions for oxygen assisted lasox laser cutting of thick plates

作　　者：邓德圣[1] 刘建华[1] 胡席远[1] 曹阳[1] 

机构地区：[1]华中科技大学材料科学与工程学院激光技术国家重点实验室,武汉430074

出　　处：《激光技术》2003年第3期178-181,共4页Laser Technology

摘　　要：介绍了散焦法的原理和特点 ,分析了形成稳态切割的条件 ,并用有限元方法对切割温度场进行了数值模拟 ,在此基础上得出散焦光斑直径、切割速度、激光功率等参数对切割质量的影响规律 ,预测了 2 0mm板的切割速度范围。用散焦法进行了切割实验。结果表明 ,散焦法可以成功切割 12mm ,2 0mm厚钢板 ,同时也说明数值模拟预测结果与实验结果非常接近。The principles and characteristics for lasox laser cutting of thick plates are presented in this paper. The steady*$-state conditions for the cutting were analyzed. The finite element method was used to simulate the surface temperature field along the centerline position in the cutting process. Based on this result,cutting quality was evaluated by the function of beam diameter,cutting speed and incident power. The range of cutting speed was also predicted for 20mm thick plates. A cutting experiment was made and the results shown that 12mm and 20mm thick plates could be cut successfully by the method ,at the same time,a reasonable agreement between the numerical simulation and the experimental results was found.

关 键 词：CO2激光切割 散焦法 温度场 数值模拟 厚板 

分 类 号：TG485[金属学及工艺—焊接]