激光光内送粉线形悬垂分支结构直接成形  

Laser Cladding for Direct Forming of Cantilevered Slender Structure Part Based on Inside Laser Powder Feeding

作　　者：贾帅[1] 傅戈雁[1] 方琴琴[1] 石世宏[1] 姜付兵[1] 

机构地区：[1]苏州大学机电工程学院激光制造技术研究所,江苏苏州215021

出　　处：《中国激光》2016年第3期80-86,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61475107;11172191);江苏省重点研发项目(BE2015067)

摘　　要：基于光内送粉技术和KUKA 机器人，采用间歇式光加载、单点直接堆积成形方法，通过切向分层方法得到了0°～60°连续变姿态悬垂和多角度分支线形结构。通过ANSYS 瞬态热力学仿真分析不同激光加载时间下熔池温度变化趋势，并通过试验验证得出最优加载时间。检测结果表明：成形的线形结构尺寸精度较好，截面尺寸均匀，最大相对误差为1.6%，表面粗糙度可达1.98～2.47 μm；对成形件不同倾角处进行微观组织观察表明，其组织均匀致密，无明显缺陷。The part with an incline angle changing from 0° to 60°and the part with multi-angle are formed by normal direction slices. They are generated by the single point deposition and the intermittent processing based on inside laser powder feeding technology and KUKA robot. The optimized loading time is got from the ANSYS thermo dynamics simulation and corresponding experiments. The experimental results indicate that the forming slender structure part has a high precision and uniform section size. The biggest relative error is 1.6% and the surface roughness is 1.98~2.47 mm. The microstructures of the part at different incline angles are similar without apparent defect.

关 键 词：激光技术 线形结构 间歇式光加载 光内送粉 变姿态成形 Z轴提升量 

分 类 号：TN249[电子电信—物理电子学]