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是(shi)利(li)用正(zheng)負兩極在瞬間短(duan)路時產生(sheng)的(de)高溫(wen)電(dian)(dian)(dian)(dian)弧來熔化電(dian)(dian)(dian)(dian)焊(han)條上的(de)焊(han)料和被(bei)焊(han)材(cai)料，來達到使(shi)它(ta)們(men)結(jie)合的(de)目(mu)的(de)。電(dian)(dian)(dian)(dian)焊(han)機的(de)結(jie)構十(shi)分(fen)簡(jian)單，說白了就(jiu)是(shi)一個(ge)大功率的(de)變壓器，將220V交(jiao)流(liu)電(dian)(dian)(dian)(dian)變為(wei)低電(dian)(dian)(dian)(dian)壓，大電(dian)(dian)(dian)(dian)流(liu)的(de)電(dian)(dian)(dian)(dian)源，可(ke)以是(shi)直流(liu)的(de)也可(ke)以是(shi)交(jiao)流(liu)的(de)。