基于SLM工艺角盒类零件支撑结构的优化设计OA

Angle box parts are a type of commonly used connectors widely applied in fuselage structures.Selective Laser Melting(SLM)as an advanced manufacturing technology,enables the rapid trial production of angle box parts.To explore the suitable support structures for angle box parts and ensure the forming success rate and precision of the parts,an integrated method of experiments and numerical simulation was adopted to optimize the design of support structures for two types of angle box parts.Meanwhile,various mechanical properties of the parts were characterized through the testing of the companion samples.The results show that the"I-shaped"angle box with optimized support structures achieves better forming quality;the"C-shaped"angle box with shape-controlled supports exhibits higher forming precision than that without shape-controlled supports.The simulation results indicate that after the addition of optimized shape-controlled supports,the maximum deformation and maximum stress of the angle box are reduced by 74％and 18％,respectively.The test results of the companion samples demonstrate that all mechanical properties of the SLM-fabricated samples exceed the requirements specified in GJB 2744-1996 Specification for《Titanium and Titanium Alloy Open Die Forgings and Die Forgings for Aerospace Applications》.This research can provide a reference for the support optimization and digital model design of angle box parts based on the SLM process.