Aluminum alloy robotic arm housing mold was printed by FDM（fused deposition molding）process

and the robotic arm housing sand core was printed by 3 DP（three-dimensional rapid printing molding）process.The process parameters such as dimensional accuracy

surface roughness and strength of the core were analyzed.The mold and sand core were used for the vacuum-process modeling aluminum alloy casting experiment.The results indicate that the linear shrinkage and volume shrinkage of robotic arm housing mold reach 0.301%

1.121%

respectively

and the final compressive strength of sand core for 24 his 1.424 MPa

and the linear shrinkage and volume shrinkage as well as the surface roughness of the robotic arm housings reach 0.342%

1.253%and 3.314μm

respectively

meeting the casting quality requirements.