船用1561铝合金薄板TIG电弧加热矫正的有限元分析

Finite Element Analysis of TIG Arc Heating Straightening of Marine 1561 Aluminum Alloy Sheet

近年来,TIG电弧加热矫正焊接变形越来越多的应用于船舶生产中。本文采用有限元分析软件对TIG电弧矫正工艺进行研究,对船用1561铝合金TIG热矫正过程进行有限元模拟,分析电弧摆动宽度、电弧摆动速度等对铝合金变形矫正工艺的影响,为实际生产中TIG电弧热矫形的应用提供理论指导。结果表明,为实现有效的电弧矫形效果,产生足够大塑性应变区域的同时,还要保证电弧加热时间和热输入以产生较大的横向塑性应变,进而产生足够大的面外变形,用以抵消船体结构的焊后变形。

In recent years,TIG arc heating straightening welding deformation has been increasingly used in ship production.This paper uses finite element analysis software to study the TIG arc straightening process,simulates the TIG hot straightening process of the marine 1561 aluminum alloy,analyzes the influence of the swing arc width and arc swing speed on the deformation correction process of the aluminum alloy,provides theoretical guidance for the application of TIG arc heating straightening in actual production.The results show that in order to achieve an effective arc straightening effect,a large enough plastic strain area should be generated,and the arc heating time and heat input should also be ensured to create a large lateral plastic strain,thereby creating a large enough external deformation to offset the post-welding deformation of the hull structure.