摘要
考虑皮膜与原模 (被衬 )的不同传热特性 ,建立了有限尺寸双层板激光熔凝数学模型 ,模拟计算激光熔凝的热过程 ;着重研究了激光功率、斑径、光束移动速度对等离子熔射成形件温度场分布的影响规律 ,所建立的最大熔凝厚度计算结果与实验基本吻合 ,为获得平整。
A mathematical model of double slabs in finite size for laser melting workpiece is established by considering the different behavior of heat transfer between coating and prototyping / backing material, which can be used to simulate the heat cycle calculation of laser melting. The effective rules of laser power, moving speed and facular dimension on temperature field distribution of workpiece have been investigated especially, as well as the calculative formula have been presented to predict the largest melted depth, and the computed values are agreed with that of experiments closely. The results offer a theoretical basis for selecting optimum parameters to obtain smooth and flat melting layer.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2002年第15期1324-1327,共4页
China Mechanical Engineering
基金
国家自然科学基金资助项目 (5 0 175 0 3 55 980 5 0 0 2 )
福建省青年人才创新基金资助项目(2 0 0 1J0 11)
塑性成形模拟及模具技术国家重点实验室开放课题
关键词
等离子熔射成形件
激光熔凝
数值计算
温度场
plasma spray forming laser melting temperature field numerical calculation
