基于光内送粉技术, 进行了空间密排多元扭曲薄壁件的成形研究, 获得了熔覆喷头的空间运动轨迹及姿态; 根据熔覆层截面与工艺参数之间的解析关系和单道实验, 建立了高度工艺模型, 并进行了二元扭曲薄壁成形; 采用间歇熔覆工艺, 完成了多元扭曲密排叶片的堆积。检测结果表明, 成形件表面平整, 叶片单元最小间隙为6.5 mm, 叶片厚度基本稳定在2.7 mm; 各部位组织致密、显微硬度分布较均匀。

Based on the inside-laser powder feeding technology, the forming research of close-packed multivariant twisty thin-wall parts is performed. The spatial motion trajectory and the pose of the cladding nozzle are obtained. According to the analytic relationship between the cladding layer section and the process parameters as well as the single-pass experiment, the height process model is set up and the forming of binary twisty thin-wall parts is performed. The close-packed multivariant twisty thin-wall parts are accumulated by the intermittent cladding process. The testing results show that the surface of formed parts is smooth, the minimum clearance among blade units is 6.5 mm, and the thickness of blades is mainly stable around 2.7 mm. The distributions of the microstructure and microhardness are relatively homogeneous.