环形激光光内送粉成形薄壁件熔池特征研究  

Study on Characteristics of Inner Ring Laser Powder Feed Molten Pool of Thin Workpiece

作　　者：吴少华[1,2] 石世宏[2] 肖军艳[2] 傅戈雁[2] 石皋莲[1,2] 

机构地区：[1]苏州工业职业技术学院,江苏苏州215104 [2]苏州大学激光制造技术研究所,江苏苏州215021

出　　处：《应用激光》2013年第3期250-253,共4页Applied Laser

基　　金：国家自然科学基金资助项目(项目编号:50975187;61078019)

摘　　要：基于"光束中空,粉管居中,光内送粉"的成形方式,利用高速CCD对锥形空心回转薄壁件环形激光光内送粉快速成形过程进行实时监测,研究通过对熔池特征参数的提取,实现实时控制激光功率的方法。实验表明:在其他参数不变的情况下,增大激光功率,熔宽、熔深均有变大趋势;成形稳定期,熔池的面积在0.25～0.70 mm2之间变化,激光功率维持在1 kW左右,成形件最大高度达到55 mm。终成形件外表面非常光滑,整体壁厚均匀,层间搭接也非常均匀,无塌陷和错层等现象,达到了较好的成形效果。In order to obtain the characteristic parameters of molten pool and realize real-time control of laser power, a high-speed CCD is used to monitor the laser rapid forming process of thin-walled rotating hollow cone, which is based on the technology of ＂hollow beam, powder tube center, inside-beam powder feeding＂.Experiments show that： In the plateau stage, pool area changes in 0.25-0.70 mm2, laser power remains at about 1 kW, formed parts achieves maximum height of 55 ram.

关 键 词：激光熔覆 环形激光束 高速CCD 熔池 

分 类 号：TG441.8[金属学及工艺—焊接]