激光%2bGMAW复合热源焊体积热源模型的改进.pdfVIP

2010 全国计算机辅助焊接工程学术会议研讨会论文集 激光+GMAW 复合热源焊体积热源模型的改进 胥国祥 1,2 武传松 2 Suck Joo Na2 秦国梁 2 1. 江苏科技大学材料学院，镇江，212003 2. 山东大学现代焊接技术研究所，济南，250061 3. 韩国科学技术院机械工程学院，大田，305-701, 韩国 摘要 为了减少前期研究所建将建立的激光+GMAW-P 复合热源焊组合式体积热源模型人为设定分布参 数的数量，增加计算结果的稳定性，本文通过建立新的激光深熔焊温度场数值分析模型对其进行了改进。 将小孔尺寸与激光焊体积热流分布区域相联系，依据小孔尺寸对激光焊体积热源分布参数进行标定，提出 了新的基于小孔尺寸的激光焊体积热源模式。将此种模式激光+GMAW-P 复合焊热源焊数值模拟，以降低 计算结果对人为设定参数的依赖性。利用改进后的复合焊模型对不同焊接条件下的激光焊焊缝形状尺寸进 了数值模拟，计算结果与实验结果吻合良好，表明新的计算模式有效地克服了原有体积热源模型的局限性。 关键词：复合热源焊，小孔尺寸，体积热源，焊缝成形 Improvement of Volumetric Heat Source Model for Laser+GMAW Hybrid Welding 1,2 2 3 2 XU Guoxiang , WU Chuansong , Suck Joo Na , QIN Guoliang 1 School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhengjiang 212003 2 Institute for Advanced Welding Technology, Shandong University, Jinan 250061 3 Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea ABSTRACT To reduce the number of distribution parameters selected freely in the previously developed combined volumetric heat source model for laser+GMAW hybrid welding and increase the stability of calculated results, in this study, it is improved through developing a new numerical analysis model of temperature fields for deep penetration laser welding. By correlating the keyhole dimensions to the distribution domain of the volumetric heat source for laser welding and selecting heat source distribution parameters based on keyhole size, the volumetric heat source mode for laser welding based on the keyhole size is put for