摘要
目前激光熔覆成形技术一般难以实现无支撑封盖结构成形。利用光内送粉技术和斜向分层方法,对跨多道直壁的搭接封盖成形进行了研究,实现了空间斜向桥接堆积成形。探讨了光内送粉熔覆喷头在不同倾斜角度投影下环形激光能量分布规律,考察了激光偏转角对熔覆层貌的影响。引入层高测控技术对熔覆层高度进行实时检测并反馈控制,保证堆积形貌不失稳。对桥接封盖成形结构组织检测结果表明:空间封盖搭接处表面平整,壁厚均匀,硬度总体保持稳定。
At present, laser cladding forming techniques are generally difficult to realize the formation of an unsupported capping structure. Using the intra-powder powder feeding technology and the oblique stratification method, the lap joint cap forming across multiple straight walls was studied, and the spatial oblique bridging stacking was realized. The distribution of annular laser energy under different oblique angle projections of light-fed powder-fed nozzles was discussed. The influence of tilt deflection angle on the appearance of cladding was investigated. The layer height measurement and control technology is introduced to detect and control the height of the cladding layer in real time to ensure that the stacking morphology is not unstable. The results of the structure inspection of the bridging cap forming structure show that the surface of the space cover overlap is flat, the wall thickness is uniform, and the hardness is generally stable.
作者
陈磊
石拓
石世宏
梅有柱
Chen Lei;Shi Tuo;Shi Shihong;Mei Youzhu(School of Mechanical and Electric Engineering,Soochow University,Suzhou,Jiangsu215021,China)
出处
《应用激光》
CSCD
北大核心
2019年第5期728-733,共6页
Applied Laser
基金
国家重点研发计划(项目编号:2016YFB1100300)
关键词
激光熔覆成形
光内送粉
斜向堆积
桥接
laser cladding forming
inside-laser powder feeding
oblique stacking
bridging