某核级空心叶片自动焊装置及试验

Automatic welding installation experimental study of a nuclear grade hollow blade

采用机器人自动焊方法对核级空心叶片进行焊接试验,并与手工焊进行对比,分析了焊接接头的微观组织和硬度分布,优化了自动焊接工艺参数。组建自动焊智能焊接系统,设计了仿形体结构工装夹具,与多变位机工位联动搭建自动焊生产线,完成空心叶片试验件的试制,通过试验验证其生产效率较传统手工焊接提升1倍。通过焊接数值模拟分析研究了空心叶片焊接位置和分段焊方案,并与实际叶片焊接进行对比分析,结果表明,自动焊焊接变形趋势与实际焊接过程基本一致,焊缝成形良好。通过研究空心叶片自动焊系统,可以提高核电五级空心叶片焊接的经济性和可靠性,更好地满足产品质量要求,具有较大工程应用价值。

A welding test is conducted on nuclear grade hollow blade by robot automatic welding method,comparing with manual welding,the microstructure and microhardness distribution of the welded joint are analyzed,and the automatic welding parameters are optimized.The intelligent welding system of automatic welding is established,and the fixture of profiling structure is designed.The automatic welding production line is built with the linkage of multi-positioner,the trial production of hollow blade test piece is completed.Through the test,it is verified that the production efficiency of the system is twice higher than that of traditional manual welding.The welding position and segmented welding scheme of hollow blade are studied by welding numerical simulation analysis,and are compared with the actual blade welding.The results show that the deformation trend of automatic welding is basically consistent with the actual welding process,the weld is well formed.Through the research of hollow blade automatic welding system,the economy and reliability of nuclear power five stage hollow blade welding can be improved,and the product quality requirements can be better met.Thus the research has great practical significance in engineering application.