摘要
在后倾式离心风机叶轮机器人焊接时,为了既保证焊缝质量又最大程度减小焊后变形量,综合运用热弹塑性有限元法和固有应变法对其焊接工艺进行优化。利用基于热弹塑性有限元法的Visual-Environment软件,结合双椭球热源模型对焊缝熔池情况进行数值模拟和实验验证,得到了最优焊接参数。在已知焊缝固有应变的情况下,采用基于固有应变法的Weld Planner软件对后倾式离心风机叶轮在不同焊接顺序和焊接方向下产生的变形进行了预测,得到了最优焊接顺序和焊接方向。运用得到的最优焊接工艺对后倾式离心风机叶轮进行试生产,其焊后变形情况与数值模拟得出的结果较为一致,满足产品的质量要求。
To ensure weld seam quality and minimize post-welding deformation on robot welding of the backward centrifugal fan impeller,a combined approach integrating TEP-FEM and ISM were applied for welding process optimization.Optimal welding parameters were obtained through a numerical simulation and experimental validation of molten weld pool at weld seam by utilizing TEP-FEM-based Visual-Environment software,in combination with double ellipsoidal heat source model.Given the known inherent strain of weld seams,the post-welding deformations of the backward centrifugal fan impellers were numerically predicted under different welding sequences and welding directions with Weld Planner software based on ISM,the optimal welding sequence and welding direction were located.Pilot production is conducted by utilizing the optimal welding processes on backward centrifugal fan impellers.The resultant post-welding deformations are consistent with the numerical simulations,which meets the quality requirements of the products.
作者
王林
潘骏
贺青川
丁炜
顾利威
WANG Lin;PAN Jun;HE Qingchuan;DING Wei;GU Liwei(National and Local Joint Engineering Research Center of Reliability Analysis and Testing for Mechanical and Electrical Products,Zhejiang Sci-Tech University,Hangzhou,310018;Zhejiang Sci-Tech University Shangyu Industrial Technology Research Institute Co.,Ltd.,Shaoxing,Zhejiang,312300)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2020年第19期2379-2387,共9页
China Mechanical Engineering
基金
浙江省重点研发计划资助项目(2019C03108)。
关键词
风机叶轮
焊接变形
焊接工艺优化
数值模拟
热弹塑性有限元法
固有应变法
fan impeller
welding deformation
welding process optimization
numerical simulation
thermal elastic-plastic finite element method(TEP-FEM)
inherent strain method(ISM)
