預精焊機組多絲內焊起弧穩(wěn)定性問題的研究

Research on Problem Concerning Instability of Arcing during Multi-wire Internally-welding Process of Two-step Pipe Welding Mill

摘要: 簡述了螺旋縫焊管預精焊機組的內焊結構；介紹了數(shù)字化焊接系統(tǒng)的內焊一鍵式起弧過程及原理；分析了埋弧焊電弧自我調節(jié)過程及影響內焊起弧穩(wěn)定性的因素，總結出提高起弧穩(wěn)定性的措施。實踐證明：通過優(yōu)化數(shù)字電焊機參數(shù)，調整最大送絲速度，結合實踐操作經驗，使內焊起弧穩(wěn)定性得到大幅度提升，提高了螺旋縫焊管的質量。

Abstract: Briefly described here in the essay is the structure of the internally-welding unit of the SAWH pipe two-step(pre-welding and finish welding)operation line.And elaborated are the one-key type arcing process and principle of the internally-welding function of the digital welding system.Also analyzed are the SAW arc self-adjustment process, and elements that may affect arcing stability of internally-welding operation, based on which, measures aiming at improving the arcing stability are determined, and taken.Relevant practice shows that the arcing stability of the internally-welding process is obviously improved, and so is quality of the SAWH pipe due to implementing such measures as optimizing parameters of the digital welder, setting the maximum wire-feeding speed, and taking the actual operation experience into consideration, etc.