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基于光内送粉技术和KUKA机器人,采用间歇式光加载、单点直接堆积成形方法,通过切向分层方法得到了0°~60°连续变姿态悬垂和多角度分支线形结构。通过ANSYS瞬态热力学仿真分析不同激光加载时间下熔池温度变化趋势,并通过试验验证得出最优加载时间。检测结果表明:成形的线形结构尺寸精度较好,截面尺寸均匀,最大相对误差为1.6%,表面粗糙度可达1.98~2.47 mm;对成形件不同倾角处进行微观组织观察表明,其组织均匀致密,无明显缺陷。
Based on the light powder feeding technology and the KUKA robot, intermittent light loading and single-point direct deposition method were used to obtain the 0 ° ~ 60 ° continuous variable-state overhang and multi-angle branch linear structures by the tangential layering method. The trend of weld pool temperature under different laser loading time was analyzed by ANSYS transient thermodynamic simulation, and the optimal loading time was obtained through experimental verification. The test results show that the formed linear structure has better dimensional accuracy and uniform cross section, the maximum relative error is 1.6% and the surface roughness can reach 1.98 ~ 2.47 mm. Microstructure observation shows that the structure of the linear structure is uniform and compact , No obvious defects.