【摘要】 激光打孔过程中存在强烈热流耦合,板材的液化及孔形成规律复杂。以10 mm厚低碳钢板为研究对象,综合激光发散角、辅助气体对熔融金属去除与氧化作用,建立了激光打孔数值仿真模型,并进行实验验证,发现激光的发散角、金属蒸汽对打孔速度的影响特性。更多还原

【Abstract】 Laser drilling is a process coupled with Thermal transfer and Fluid dynamics.The liquefaction and formation of the drilling hole is very complex.This article considering a 10 mm thick mild steel plate as the research object,a complete simulation model was established.This model include laser divergence angle,auxiliary gas pressure on the molten metal and the oxidation reaction phenomenon.And experiment was designed for the verification of the simulation.The study finds the influence of the laser divergence angle and metal vapor on drilling speed in thick plate.更多还原