FV520(B)钢叶片激光再制造动态形变规律及试验优化

Dynamic deformation and experimental optimization of FV520 (B) steel blade for laser remanufacture

摘要:

针对体积损伤压缩机叶片的激光再制造成形形变控制难题，采用有限单元“生死”控制方法，模拟脉冲激光优化工艺下成形过程，获取成形形变动态历程及规律，优化了脉冲激光成形工艺并采用IPG光纤激光再制造系统开展了叶轮激光再制造成形试验.采用PowerScan Ⅱ型蓝光三维反求测量仪精确测量了再制造成形形变尺寸，验证了有限元分析结论的正确性.试验结果表明：增加首末两成形层之间时间间隔，可控制整体形变在1 mm以内，热影响区形变控制在0.28~0.50 mm以内，经机械加工后尺寸误差精度不超过0.02 mm，角度误差精度不超过0.03°，验证了脉冲激光工艺的优化性，为叶片类部件再制造成形提供工艺参考.

Abstract:

Aiming at the deformation controlling for compressor blades with volume damage, the birth and death finite element method was adopted to simulate the forming course of pulsed laser remanufacture. The dynamic deformation process and rules were got through the analysis. The pulsed laser forming process was optimized. The IPG optical fiber laser remanufacturing system was taken to experiment on the laser remanufacturing forming on impeller. The PowerScan Ⅱ blue light three dimensional reverse seeking measuring instrument was taken to measure the size of the remanufacturing forming deformation precisely. The conclusion of the finite element analysis was validated. The results show that, through the time increasing of the first and last two layers, the whole forming deformation is controlled within 1 mm; the deformation precision of heat-affected zone is controlled between 0.28~0.50 mm; the dimension precision after mechanical machining is within 0.02 mm; the angle precision is within 0.03°. The optimization of pulsed laser technology is verified. The process is taken reference for the remanufacturing forming of blade parts.