The aero-engine nozzle is a key component that affects combustion performance. It has many components and complex structure

especially the difficulty of the processing of nozzle internal flow channel

resulting in long manufacturing cycle and high cost. However

the nozzle as a non-main load-bearing part is very suitable for laser selective melting manufacturing (SLM)

which is due to the high precision of processing

strong free-form ability and high density of material of laser selection melting. In this paper

based on the technical advantages of SLM

the shell of the nozzle is integrally designed

and the mechanical analysis and topological optimization were analyzed. The molding part was printed by SLM and about 13.5% of its weight has been reduced. The printing error is less than 0.2mm

meeting the margin requirement of local finishing

and the mechanical properties of the furnace specimen reach the level of traditional casting and forging. SLM simplifies the processing of the nozzle

shortens the manufacturing cycle

and has high precision of flow path forming

which achieves the goal of reducing weight and improving performance.