鋁(lv)合金焊(han)接過程若導電嘴及保護(hu)嘴附有明顯的(de)飛濺(jian)物應及時清除以保證送絲順暢(chang)，必要(yao)時要(yao)更換導電嘴及保護(hu)嘴。

鋁合金焊接(jie)(jie)過程(cheng)若有中(zhong)斷，接(jie)(jie)頭處(chu)重新(xin)引(yin)弧(hu)前應對接(jie)(jie)頭處(chu)進行清理，接(jie)(jie)縫處(chu)應有一定的搭接(jie)(jie)長度。

鋁(lv)合金焊(han)(han)接過程若焊(han)(han)道特別是打底焊(han)(han)道熔合不良或(huo)有凹坑存在(zai)，應刨除干凈后(hou)再焊(han)(han)下一道焊(han)(han)縫。

焊工焊后應(ying)(ying)將鋁合金(jin)焊縫(feng)表(biao)面(mian)的(de)清理干凈，并對(dui)(dui)焊縫(feng)外觀進行自檢。焊縫(feng)表(biao)面(mian)不應(ying)(ying)有裂紋(wen)、未熔合以(yi)及超出規定的(de)咬邊(bian)、氣孔、弧坑(keng)等缺陷，對(dui)(dui)不符(fu)合驗收要求的(de)焊縫(feng)應(ying)(ying)做(zuo)出明顯的(de)標記，以(yi)便進行修(xiu)補。

當需要(yao)采用熔化極(ji)氣體保護焊、藥芯焊絲(si)氣體保護焊或鎢極(ji)弧焊將屏柵、金屬絲(si)網或延伸金屬焊接(jie)到鋼結構框架上，進行焊接(jie)時金屬絲(si)網容易產(chan)生燒穿和焊縫(feng)未熔合(he)現(xian)象，應如(ru)何(he)進行處理？

在金屬(shu)(shu)(shu)絲網或延伸金屬(shu)(shu)(shu)上(shang)(shang)(shang)放(fang)置(zhi)非金屬(shu)(shu)(shu)墊(dian)(dian)(dian)(dian)圈(quan)(quan)并且將墊(dian)(dian)(dian)(dian)圈(quan)(quan)、金屬(shu)(shu)(shu)絲網和框架夾緊在一起，不允許采用含鉻或鍍鋅墊(dian)(dian)(dian)(dian)圈(quan)(quan)，墊(dian)(dian)(dian)(dian)圈(quan)(quan)應采用未涂(tu)敷的(de)，在被焊(han)(han)位置(zhi)的(de)墊(dian)(dian)(dian)(dian)圈(quan)(quan)上(shang)(shang)(shang)部放(fang)置(zhi)一個(ge)更(geng)(geng)大(da)的(de)墊(dian)(dian)(dian)(dian)圈(quan)(quan)作為散熱(re)片。上(shang)(shang)(shang)墊(dian)(dian)(dian)(dian)圈(quan)(quan)應具有一個(ge)比下(xia)墊(dian)(dian)(dian)(dian)圈(quan)(quan)更(geng)(geng)大(da)的(de)孔(kong)，以避免上(shang)(shang)(shang)墊(dian)(dian)(dian)(dian)圈(quan)(quan)也(ye)被焊(han)(han)接在一起。然(ran)后通過墊(dian)(dian)(dian)(dian)圈(quan)(quan)的(de)兩(liang)個(ge)孔(kong)進(jin)行塞焊(han)(han)，陶(tao)瓷(ci)(ci)襯(chen)(chen)墊(dian)(dian)(dian)(dian)，應使焊(han)(han)縫處于(yu)下(xia)墊(dian)(dian)(dian)(dian)圈(quan)(quan)部分。操作者可以采取一些其他的(de)方法(fa)(fa)得到(dao)足夠的(de)熱(re)量并進(jin)行焊(han)(han)接，注意要防(fang)止周圍屏柵(zha)或金屬(shu)(shu)(shu)絲網燒穿(chuan)， 另一種方法(fa)(fa)是采用一個(ge)帶孔(kong)的(de)金屬(shu)(shu)(shu)板條，陶(tao)瓷(ci)(ci)密封襯(chen)(chen)墊(dian)(dian)(dian)(dian)，將孔(kong)對準(zhun)需要焊(han)(han)接的(de)部位，電焊(han)(han)陶(tao)瓷(ci)(ci)襯(chen)(chen)墊(dian)(dian)(dian)(dian)，并放(fang)置(zhi)散熱(re)墊(dian)(dian)(dian)(dian)圈(quan)(quan)，然(ran)后進(jin)行塞焊(han)(han)。

大(da)跨度鋼(gang)梁一般采用箱(xiang)型結構，箱(xiang)型結構焊(han)(han)接工(gong)(gong)作(zuo)量大(da)、工(gong)(gong)作(zuo)強度大(da)、勞動(dong)效(xiao)率(lv)低，陶瓷襯(chen)墊焊(han)(han)接，制(zhi)作(zuo)安裝(zhuang)過程中(zhong)(zhong)力(li)求(qiu)單面(mian)(mian)焊(han)(han)雙面(mian)(mian)成(cheng)型以(yi)提高工(gong)(gong)作(zuo)效(xiao)率(lv)。但由于操作(zuo)水平和(he)焊(han)(han)接空間受限，往往焊(han)(han)縫難以(yi)雙面(mian)(mian)成(cheng)型；通(tong)過陶瓷襯(chen)墊在鋼(gang)梁焊(han)(han)接中(zhong)(zhong)的應(ying)用實驗，積累了經驗，說明(ming)該焊(han)(han)接工(gong)(gong)藝的適用性，對中(zhong)(zhong)厚板單面(mian)(mian)焊(han)(han)雙面(mian)(mian)成(cheng)型有一定的參考作(zuo)用。關鍵(jian)詞：陶瓷襯(chen)墊；單面(mian)(mian)焊(han)(han)雙面(mian)(mian)成(cheng)型；焊(han)(han)接工(gong)(gong)藝。