Fig. 1. Inside-laser powder feeding. (a) Schematic; (b) physical picture

Fig. 2. Model of horizontal layered accumulation

Fig. 3. Model of normal direction accumulation

Fig. 4. Segmentation of unequal-height cladding tracks

Fig. 5. Schematic of scanning with fixed parameters

Fig. 6. Cladding process of uneual-height cladding tracks with transition segments

Fig. 7. Flow chart of closed-loop forming system

Fig. 8. (a) Front view and (b) right view of fan-shaped forming parts

Fig. 9. Cladding heights of different segments of forming parts. (a) j=1; (b) j=2; (c) j=3; (d) j=4; (e) j=5; (f) j=6; (g) j=7

Fig. 10. Metallographic analysis images at different positions of forming parts. (a) Outside; (b) middle; (c) inside