點(dian)焊(han)機利用正極(ji)(ji)和負極(ji)(ji)瞬間(jian)短路時產生(sheng)的(de)高溫電(dian)(dian)弧熔化電(dian)(dian)極(ji)(ji)之間(jian)的(de)焊(han)接(jie)材料，以(yi)達(da)到將(jiang)它(ta)們結(jie)合(he)的(de)目的(de)。點(dian)焊(han)機的(de)結(jie)構非常簡單(dan)。 坦(tan)率地說，它(ta)是一種大功(gong)率變(bian)壓器(qi)，可將(jiang)220V AC轉換為(wei)低壓大電(dian)(dian)流(liu)電(dian)(dian)源，可以(yi)是DC或AC。焊(han)接(jie)變(bian)壓器(qi)具有(you)自己的(de)特(te)性，即電(dian)(dian)壓會急劇下降(jiang)。

點(dian)焊的過程是(shi)打(da)開冷 卻水; 清(qing)潔(jie)焊件的表面，正確組(zu)裝后(hou)，將其(qi)送入上(shang)下電ji之(zhi)間，施加壓力使其(qi)接(jie)觸良好;

給兩個工(gong)件(jian)的(de)接(jie)觸表面通(tong)電(dian)(dian)(dian)(dian)以加熱并(bing)部(bu)分熔化，從(cong)而形成金塊：斷電(dian)(dian)(dian)(dian)后保持壓力，以便使金塊在壓力下冷卻(que)并(bing)固化以形成焊(han)(han)(han)點(dian)(dian); 去除壓力并(bing)取出工(gong)件(jian)。 點(dian)(dian)焊(han)(han)(han)工(gong)藝參數(例如(ru)焊(han)(han)(han) 接(jie)電(dian)(dian)(dian)(dian)流，電(dian)(dian)(dian)(dian)ji壓力，通(tong)電(dian)(dian)(dian)(dian)時(shi)間和(he)(he)電(dian)(dian)(dian)(dian)ji工(gong)作表面尺寸)對焊(han)(han)(han)接(jie)質量有(you)重要影響。 電(dian)(dian)(dian)(dian)ji點(dian)(dian)火后，電(dian)(dian)(dian)(dian)壓下降，并(bing)調(diao)節焊(han)(han)(han) 接(jie)機的(de)工(gong)作電(dian)(dian)(dian)(dian)壓。 除了初(chu)級220/380電(dian)(dian)(dian)(dian)壓轉(zhuan)換外，次(ci)級線(xian)圈還(huan)具有(you)抽頭(tou)式(shi)電(dian)(dian)(dian)(dian)壓轉(zhuan)換，并(bing)且還(huan)有(you)一(yi)個可(ke)調(diao)節的(de)鐵芯，可(ke)通(tong)過鐵芯進行(xing)調(diao)節。 電(dian)(dian)(dian)(dian)焊(han)(han)(han)機一(yi)般是大功率變壓器，由電(dian)(dian)(dian)(dian)感原(yuan)理制(zhi)成。 電(dian)(dian)(dian)(dian)感在打開(kai)和(he)(he)關閉時(shi)會產生(sheng)巨大的(de)電(dian)(dian)(dian)(dian)壓變化，并(bing)且正極(ji)和(he)(he)負(fu)極(ji)的(de)瞬時(shi)短(duan)路(lu)所產生(sheng)的(de)高壓電(dian)(dian)(dian)(dian)弧用于熔化電(dian)(dian)(dian)(dian)極(ji)上的(de)焊(han)(han)(han)料。以達到將它們結(jie)合起來的(de)目的(de)。