基于正交试验的T形接头焊接工艺优化

发布时间：2019-07-13 20:42

【摘要】：焊接变形可以直观地看到,控制变形手段也非常多.焊接残余应力分布复杂,关键位置残余应力大小对产品有着很大的影响.文中利用焊接数值模拟和试验相结合的手段,采用单因子和多因子正交试验相结合的设计方法,以焊接残余应力为评价指标,对T形接头焊接的工艺参数进行优化设计,获得了T形接头的残余应力分布状况.结果表明,拼焊间隙为2 mm以下时,焊缝宏观形貌满足要求;焊接速度对焊接残余应力的影响最为显著,其次为送丝速度和拼焊间隙.利用数值模拟和试验相结合的方法,优化了焊接工艺参数,降低了焊接残余应力的峰值,有效地减少了试验次数,节约了成本.
[Abstract]:Welding deformation can be seen intuitively, and there are many means to control deformation. The distribution of welding residual stress is complex, and the residual stress at the key position has a great influence on the product. In this paper, the welding process parameters of T-joint are optimized by means of welding numerical simulation and test, the design method of single factor and multi-factor orthogonal test is adopted, and the welding residual stress is taken as the evaluation index to optimize the welding process parameters of T-shaped joint, and the residual stress distribution of T-joint is obtained. The results show that when the welding gap is less than 2 mm, the macroscopic morphology of the weld meets the requirements, and the welding speed has the most significant effect on the welding residual stress, followed by wire feeding speed and welding gap. By using the method of numerical simulation and test, the welding process parameters are optimized, the peak value of welding residual stress is reduced, the test times are effectively reduced, and the cost is saved.
【作者单位】：江苏徐州工程机械研究院;徐工集团工程机械有限公司高端工程机械智能制造国家重点实验室;西安交通大学材料科学与工程学院;
【基金】：国家科技支撑计划资助项目(2015BAF07B02) 江苏省自然科学基金资助项目(BK20140229) 江苏省六大人才高峰资助项目(2016GDZB111)
【分类号】：TG404

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