預加工(gong)車間的(de)工(gong)作(zuo)人員根據物(wu)料(liao)(liao)清單(dan)從物(wu)料(liao)(liao)中提取物(wu)料(liao)(liao)，仔(zi)細核對物(wu)料(liao)(liao)的(de)型號、規格，并(bing)簽字，根據樣(yang)品進(jin)行預加工(gong)，并(bing)采用全(quan)(quan)自動(dong)體(ti)電容剪切機、全(quan)(quan)自動(dong)晶體(ti)管成(cheng)型機、全(quan)(quan)自動(dong)皮(pi)帶成(cheng)型機等成(cheng)型設(she)備(bei)進(jin)行加工(gong)。將加工(gong)好的(de)元器件插入PCB板的(de)相應位置，準備(bei)過波(bo)焊接。將插好插件的(de)PCB板放入波(bo)峰(feng)焊輸送帶，通(tong)過噴焊劑、預熱、波(bo)峰(feng)焊、冷卻等環節完(wan)成(cheng)PCB板的(de)焊接。

smt外觀檢(jian)測：元(yuan)器(qi)件(jian)引(yin)腳（電(dian)子）的可(ke)(ke)(ke)焊性是影響SMA焊接可(ke)(ke)(ke)靠性的主要(yao)(yao)因素，導致可(ke)(ke)(ke)焊性發(fa)生(sheng)問題的主要(yao)(yao)原因是元(yuan)器(qi)件(jian)引(yin)腳表面氧化。由于氧化較(jiao)易發(fa)生(sheng)，為保證焊接可(ke)(ke)(ke)靠性，OEM加工價格，一方(fang)面要(yao)(yao)采取措施防止元(yuan)器(qi)件(jian)在(zai)焊接前(qian)長時間暴露在(zai)空氣中(zhong)，井避免(mian)其(qi)長期(qi)儲存等；另(ling)一方(fang)面在(zai)焊前(qian)要(yao)(yao)注意對其(qi)進行可(ke)(ke)(ke)焊性測試，以便(bian)及時發(fa)現問題和(he)進行處理，可(ke)(ke)(ke)焊性測試原始的方(fang)法是目測評估。

SMT貼片(pian)(pian)(pian)加(jia)(jia)工(gong)(gong)(gong)(gong)作為一門(men)高精密(mi)的技術，對于工(gong)(gong)(gong)(gong)藝要(yao)(yao)求也十分的嚴格，現代很多電子(zi)產(chan)(chan)品的貼片(pian)(pian)(pian)元(yuan)(yuan)器(qi)(qi)件(jian)尺寸(cun)正(zheng)在趨(qu)于微小狀態(tai)，OEM加(jia)(jia)工(gong)(gong)(gong)(gong)服務，除了(le)日漸微小精致(zhi)的貼片(pian)(pian)(pian)元(yuan)(yuan)件(jian)產(chan)(chan)品，元(yuan)(yuan)器(qi)(qi)件(jian)對加(jia)(jia)工(gong)(gong)(gong)(gong)環境的要(yao)(yao)求也日益苛刻，沈陽OEM加(jia)(jia)工(gong)(gong)(gong)(gong)，錫膏剛買回來，如果不馬上用，需放(fang)入(ru)冰箱里進(jin)行冷藏，溫度(du)保持在5℃-0℃，不要(yao)(yao)低(di)于0℃。在貼裝工(gong)(gong)(gong)(gong)序，OEM加(jia)(jia)工(gong)(gong)(gong)(gong)廠(chang)家，由于貼片(pian)(pian)(pian)機(ji)(ji)設(she)備的老化以及(ji)吸(xi)嘴(zui)、供料器(qi)(qi)的損壞，容易(yi)導致(zhi)貼片(pian)(pian)(pian)機(ji)(ji)貼歪，并造成高拋料的發生(sheng)，降(jiang)低(di)生(sheng)產(chan)(chan)效(xiao)率，增加(jia)(jia)生(sheng)產(chan)(chan)成本(ben)。