目前,对焊接变形的预测大都基于有限元仿真,不仅需要高性能的计算机,计算时间也非常长。文中基于固有应变法,分析了焊接变形产生机理,提出了角变形解析预测模型。采用光纤激光焊接器,在不同焊接功率条件下,对厚度分别为0.2、0.5 mm的316L超薄不锈钢板进行搭接焊接,通过试验结果对模型进行修正并验正。研究表明,该解析预测模型可有效预测316L超薄不锈钢板焊接变形。 At present, the prediction of welding deformation is mostly based on finite element simulation, which not only needs high-performance computer but also computation time is very long. Based on the inherent strain method, the welding deformation mechanism is analyzed and the angular deformation analysis and prediction model is proposed. Using fiber laser welding, under the condition of different welding power, 316L ultra-thin stainless steel plates with thicknesses of 0.2 and 0.5 mm were respectively lap-welded. The test results were used to correct and correct the model. The research shows that the analytical prediction model can effectively predict the welding deformation of 316L ultra-thin stainless steel plate.