本文選題：變極性等離子弧　切入點(diǎn)：熔池模型　出處：《機(jī)械工程學(xué)報(bào)》2015年20期

【摘要】：通過對(duì)鋁合金3003變極性等離子弧穿孔立焊熔池振蕩行為的研究,發(fā)現(xiàn)熔池振蕩頻率與焊接熔透之間的內(nèi)在規(guī)律。在變極性電流的作用下,焊接熔池產(chǎn)生振蕩,可以通過對(duì)電弧電壓頻譜分析獲得熔池固有振蕩頻率。分別建立變極性等離子弧穿孔立焊未熔透及完全熔透熔池模型,并分析焊接電流的變化對(duì)熔池固有振蕩頻率的影響,發(fā)現(xiàn)焊接電流大小對(duì)其影響很小,可以忽略。為了驗(yàn)證該模型的準(zhǔn)確性,進(jìn)行理論與實(shí)測(cè)分析,結(jié)果表明,理論值與實(shí)測(cè)值相吻合。熔池固有振蕩頻率主要取決于熔池寬度、深度及材料密度等參數(shù),而其他焊接參數(shù)對(duì)其沒有直接影響。因此,熔池振蕩頻率可間接反映焊接熔透信息,為焊接質(zhì)量自動(dòng)控制提供了理論支持。
[Abstract]:The oscillatory behavior of molten pool in aluminum alloy 3003 with variable polarity plasma arc piercing is studied and the inherent law between the frequency of weld pool oscillation and weld penetration is found.Under the action of variable polarity current, the welding pool oscillates, and the inherent oscillation frequency of the weld pool can be obtained by analyzing the arc voltage spectrum.The models of non-permeable and fully permeable molten pool of variable-polarity plasma arc piercing vertical welding are established, and the influence of welding current on the inherent oscillation frequency of weld pool is analyzed. It is found that the influence of welding current is very small and can be neglected.In order to verify the accuracy of the model, the theoretical and practical analysis are carried out. The results show that the theoretical values are in good agreement with the measured values.The natural oscillation frequency of molten pool mainly depends on the width, depth and material density of the weld pool, but other welding parameters have no direct effect on it.Therefore, the oscillation frequency of molten pool can indirectly reflect the penetration information of welding and provide theoretical support for automatic control of welding quality.
【作者單位】： 內(nèi)蒙古工業(yè)大學(xué)材料成型自治區(qū)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(51365032) 內(nèi)蒙古自然科學(xué)基金(2015MS0504)資助項(xiàng)目
【分類號(hào)】：TG456.2

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相關(guān)期刊論文 前4條

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本文編號(hào)：1726780