铝合金船体涨拉火焰矫形工艺应力应变分析  

Stress and strain analysis of the flame correction process of aluminum alloy ship hulls

作　　者：袁银辉 路浩[1] 胡波 闫德俊 邢立伟 王龙权 Yuan Yinhui;Lu Hao;Hu Bo;Yan Dejun;Xing Liwei;Wang Longquan(Xi’an Shiyou University,Xi’an 710065,China;CSSC Huangpu Wenchong Shipbuilding Co.,Ltd.,Key Laboratory of Advanced Shipbuilding Welding Technology Enterprise of Guangdong Province,Guangzhou 510715,China;Harbin Welding Institute Limited Company,Harbin 150028,China)

机构地区：[1]西安石油大学,西安710065 [2]中船黄埔文冲船舶有限公司,广东省舰船先进焊接技术企业重点实验室,广州510715 [3]哈尔滨焊接研究院有限公司,哈尔滨150028

出　　处：《焊接》2021年第8期17-23,62,63,共9页Welding & Joining

基　　金：工信部高技术船舶项目(MC-201704-Z02);西安石油大学研究生创新与实践能力培养计划资助(YCS20212121)。

摘　　要：为解决常规火焰矫形效率低下的问题,文中提出涨拉火焰矫形技术,在焊接变形调修前使用涨拉工装反向施加拉伸强制变形,同时进行火焰调修作业,实际验证表明涨拉工艺矫形效率是常规火焰矫形的2.5倍。通过数值计算实现焊接、涨拉、矫形等工艺过程中的应力、变形传递模拟。计算结果表明,常规矫形降低原有焊缝纵向拉应力水平,降低框架中心原有挠曲变形压应力水平;涨拉条件下的火焰矫形,其压应力降低效果更好,可有效增加焰道及其周围的压缩塑性应变区,从而获得更好的矫形效果。In order to solve the problem of low efficiency of conventional flame correction,the expansion and tension flame correction technology was proposed in this paper.Before welding deformation and adjustment,the expansion and tension tool was used to reversely apply the tension and forced deformation,and the flame adjustment operation was carried out at the same time.The actual verification showed that the efficiency of the expansion and tension process correction was 2.5 times that of conventional flame correction.Numerical calculations were used to simulate the stress and deformation transfer in welding,stretching,and orthopedic processes.The calculation results showed that conventional correction reduced the longitudinal tensile stress level of the original weld and reduced the original flexural deformation compressive stress level of the frame center.The flame correction under the condition of expansion and tension had a better compressive stress reduction effect,which could effectively increase the flame channel and compression plastic strain zone around it,so as to obtain a better orthopedic effect.

关 键 词：涨拉火焰矫形 蒙皮单元结构 铝合金 数值模拟 

分 类 号：TG404[金属学及工艺—焊接]