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

【摘要】：針對(duì)為了實(shí)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(hù)焊(Double-electrode gas metal arc welding,DE-GMAW)方法。為了使其焊接過(guò)程熔滴平穩(wěn)過(guò)渡,分析旁路電弧對(duì)熔滴過(guò)渡時(shí)電流密度的影響,確定脈沖DE-GMAW熔滴過(guò)渡時(shí)電磁力的作用機(jī)制,在主路為脈沖電流情況下,分別設(shè)計(jì)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(guò)渡圖像,進(jìn)行對(duì)比分析試驗(yàn)驗(yàn)證。結(jié)果表明,焊接電流波形及組合形式不同會(huì)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(guò)程的穩(wěn)定性與焊接質(zhì)量也發(fā)生變化,對(duì)比分析得出采用同步脈沖電流時(shí)的脈沖旁路耦合電弧熔化極惰性氣體保護(hù)焊焊接過(guò)程穩(wěn)定、熔滴過(guò)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(jìn)加工與再利用國(guó)家重點(diǎn)實(shí)驗(yàn)室;長(zhǎng)城汽車(chē)股份有限公司汽車(chē)技術(shù)中心車(chē)身工程研究院;
【基金】：國(guó)家自然科學(xué)基金(51165023) 蘭州理工大學(xué)紅柳青年培養(yǎng)計(jì)劃(Q201202)資助項(xiàng)目
【分類(lèi)號(hào)】：TG444.74

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 ;Mechanism of Metal Transfer in DE-GMAW[J];Journal of Materials Science & Technology;2009年03期

2 張明賢;武傳松;李克海;張?jiān)Ｃ?;基于有限元分析對(duì)新型DE-GMAW焊縫尺寸預(yù)測(cè)[J];焊接學(xué)報(bào);2007年02期

3 武傳松;張明賢;李克海;張?jiān)Ｃ?;DE-GMAW高速電弧焊工藝機(jī)理的研究[J];金屬學(xué)報(bào);2007年06期

4 武傳松;陳茂愛(ài);李士凱;;GMAW焊接熔滴長(zhǎng)大和脫離動(dòng)態(tài)過(guò)程的數(shù)學(xué)分析[J];機(jī)械工程學(xué)報(bào);2006年02期

5 石s，

本文編號(hào)：2060044