本文選題：脈沖旁路耦合電弧熔化極惰性氣體保護焊 + 熔滴受力分析　； 參考：《機械工程學(xué)報》2015年14期

【摘要】：針對為了實現(xiàn)鋁-鋼高效高質(zhì)量的連接,提出一種高效低熱輸入的脈沖旁路耦合電弧熔化極惰性氣體保護焊(Double-electrode gas metal arc welding,DE-GMAW)方法。為了使其焊接過程熔滴平穩(wěn)過渡,分析旁路電弧對熔滴過渡時電流密度的影響,確定脈沖DE-GMAW熔滴過渡時電磁力的作用機制,在主路為脈沖電流情況下,分別設(shè)計旁路波形與主路組合形式即為恒定電流、交替脈沖電流和同步脈沖電流三種形式的研究,并使用高速攝像拍攝熔滴過渡圖像,進行對比分析試驗驗證。結(jié)果表明,焊接電流波形及組合形式不同會導(dǎo)致作用于焊接熔滴的受力發(fā)生改變,從而使得焊接過程的穩(wěn)定性與焊接質(zhì)量也發(fā)生變化,對比分析得出采用同步脈沖電流時的脈沖旁路耦合電弧熔化極惰性氣體保護焊焊接過程穩(wěn)定、熔滴過渡均勻一致且焊縫成形平整美觀。
[Abstract]:In order to realize the high efficiency and high quality connection between aluminum and steel, a pulse bypass coupled arc inert gas welding (DE-GMAW) method with high efficiency and low heat input was proposed. In order to make the droplet transfer smoothly in the welding process, the influence of bypass arc on the current density of droplet transfer is analyzed, and the mechanism of electromagnetic force during the pulsed DE-GMAW droplet transfer is determined. The combined forms of bypass waveform and main circuit are designed to be constant current alternating pulse current and synchronous pulse current respectively. The image of droplet transfer is captured by high speed camera and compared with the experimental results. The results show that the variation of welding current waveform and combination will result in the change of the force acting on the welding droplet, and the stability and quality of the welding process will also be changed. The results show that the welding process is stable, the droplet transfer is uniform and the weld formation is smooth and beautiful when the pulsed pulse current is used.
【作者單位】： 蘭州理工大學(xué)省部共建有色金屬先進加工與再利用國家重點實驗室;長城汽車股份有限公司汽車技術(shù)中心車身工程研究院;
【基金】：國家自然科學(xué)基金(51165023) 蘭州理工大學(xué)紅柳青年培養(yǎng)計劃(Q201202)資助項目
【分類號】：TG444.74

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5 石s，

本文編號：2060044