1. The product is the cavity frame of a 3D printing device manufactured in Hunan Province, made from ZLII4A alloy. The part dimensions are 1412 × 862 × 492 mm. The part is complex and prone to deformation, with geometric tolerance grade 7 and surface roughness of Ra 3.2; the remaining surfaces have a surface roughness of Ra 6.3.
2. Challenges: The parts are complex and prone to deformation; castings are susceptible to cracking; and the assembly surfaces have stringent requirements for dimensional accuracy and surface roughness.
3. Machining is performed on a five-axis gantry machining center; the remaining dimensions are precisely finished, followed by assembly of the subassemblies, which are then subjected to final precision finishing to ensure assembly accuracy and meet sealing requirements.