Transactions of Materials and Heat Treatment

Title：Optimization on welding path of super-thick plate assembly part for press frame

Authors： Hu Hao Xiao Xiaoting Cao Qixian Sun Yousong Gao Xiangdong Li Zhenshi Ruan Weiping Quan Fanghong

Unit： Guangdong University of Technology

KeyWords： press frame super-thick plate welding optimization of welding path FEM

ClassificationCode：TG315

year,vol(issue):pagenumber：2014,39(12):83-86

Abstract：

According to the heat transfer characteristics of welded plates, the numerical simulation on the thermal-mechanical couple and the optimization of the welding path were performed on the 160 t C-type super-thick plate assembly part of press frame by the elastic-plastic finite element method, parallel computing technology and the advanced CAE software. First, finite element model was established and meshed by hypermesh software. Then, 3D double ellipsoid heat source model with constant temperature which is the closest to welding pool accuraty of the CO2 arc was chosen, and the boundary conditions which are the closest to the actual boundary were chosen, and the simulation was realized by the parallel computing. Finally the optimum method of welding was obtained by analyzing the results of deformation calculation. The results show that when K-shaped seam of adjacent two sides of the plate is welded, it is necessary to ensure that the first-pass welding seam on each side of the plate is in the same side, however, when assembly workpieces are welded, backing weld of the structure should be performed first and then that of the capping in order to obtain the smallest welding deformation during welding.

Funds：

广东省战略性新兴产业核心技术攻关项目资助(2012A090100014)

胡浩（1987-），男，硕士研究生

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