作　　者： ; ; ; ; ;

机构地区： 广东技术师范学院机电学院

出　　处： 《焊接学报》 2012年第7期21-24,114,共4页

摘　　要： 为了减小双丝焊接中电磁力的影响,降低峰基值电流切换时的断弧概率,提出了一种双丝MIG焊对称过渡波形控制工艺方法.在两丝电流相位变化时增加对称过渡阶段,引入前丝过渡电流Is1、双丝过渡阶段时间ts、后丝过渡电流Is2三个控制参数.设计了正交试验并利用极差分析法对结果进行了分析和评定.结果表明,前丝过渡电流Is1、双丝过渡阶段时间ts、后丝过渡电流Is2对焊接质量的影响依次减小.验证试验进一步说明对称过渡波形控制方法工作点更宽,使焊接过程更为平稳、柔和,焊缝表面会产生光泽感强的过渡带,较为美观,为双丝波形控制研究提供了一种新思路. In order to reduce the impact of electromagnetic force in double-wire welding and the probability of breaking arc during switching between peak current and basic current,a symmetrical transition waveform control process for double-wire MIG welding is proposed.The new process tries to improve symmetrical transition during the change of double-wire phase,and introduce three control parameters:leading-wire transition current Is1,double-wire transition time Ts and trailing-wire transition current Is2.Orthogonal experiment was designed and the results were analyzed and assessed by range analysis method.It shows that the impacts of Is1,Ts and Is2 on welding quality decrease in turn.Further verification test shows that the range of operating point is wider,the welding process is more smooth and soft,and weld surface produces a glossy transition zone.This paper provides a new idea for waveform control of double-wire welding.

关 键 词： 双丝 焊 对称过渡 波控 正交试验 极差分析

领　　域： [金属学及工艺]