1. kutentha kosayenera kwa preheating.Otsika kwambiri kutentha zingachititse osauka kutsegula kwa flux kapena PCB bolodi ndi kutentha osakwanira, chifukwa osakwanira malata kutentha, kuti madzi solder wetting mphamvu ndi fluidity amakhala osauka, moyandikana mizere pakati pa solder olowa mlatho.
2. Kutentha kwa Flux preheat ndikokwera kwambiri kapena kutsika kwambiri, nthawi zambiri kumakhala madigiri 100 ~ 110, kutenthetsa kutsika kwambiri, ntchito ya flux sizokwera kwambiri.Preheat kwambiri, mu malata zitsulo flux wapita, komanso zosavuta ngakhale malata.
3. Palibe flux kapena flux sikokwanira kapena kusagwirizana, kugwedezeka kwa pamwamba kwa chitsulo chosungunuka cha malata sikumasulidwa, zomwe zimapangitsa kuti zikhale zosavuta kuziyika.
4. Yang'anani kutentha kwa ng'anjo yowotchera, kuwongolera pamtunda wa madigiri 265, ndi bwino kugwiritsa ntchito thermometer kuti muyese kutentha kwa mafunde pamene mafunde akuseweredwa, chifukwa kutentha kwa chipangizocho kungakhale pansi. za ng'anjo kapena malo ena.Osakwanira preheating kutentha kungachititse kuti zigawo zikuluzikulu sangathe kufika kutentha, ndi kuwotcherera ndondomeko chifukwa chigawo chimodzi mayamwidwe kutentha, chifukwa mu osauka kuukoka malata, ndi mapangidwe ngakhale malata;pakhoza kukhala kutentha kochepa kwa ng'anjo ya malata, kapena liwiro la kuwotcherera ndilothamanga kwambiri.
5. Njira yogwiritsira ntchito molakwika pamene dzanja likuviika malata.
6. nthawi zonse anayendera kuchita malata zikuchokera kusanthula, pangakhale mkuwa kapena zitsulo zili kuposa muyezo, chifukwa malata kuyenda yafupika, zosavuta chifukwa ngakhale malata.
7. zonyansa solder, solder mu zonyansa ophatikizana kuposa muyezo wololeka, makhalidwe a solder adzasintha, kunyowetsa kapena fluidity pang'onopang'ono kukhala oipa, ngati antimony zili zoposa 1.0%, arsenic oposa 0,2%, akutali kuposa 0.15%, fluidity ya solder idzachepa ndi 25%, pamene arsenic zili zosakwana 0.005% adzakhala de-kunyowetsa.
8. yang'anani momwe mafunde akuwotchera amawotchera, madigiri 7 ndiye abwino kwambiri, ophwanyidwa kwambiri ndi osavuta kupachika malata.
9. PCB bolodi mapindikidwe, izi zidzatsogolera PCB kumanzere pakati kumanja atatu kuthamanga yoweyula kuya kusagwirizana, ndipo chifukwa cha kudya malata mozama malo otaya malata si yosalala, zosavuta kutulutsa mlatho.
10. IC ndi mzere wa mapangidwe oipa, kuphatikiza, mbali zinayi za IC wandiweyani phazi katayanitsidwe <0.4mm, palibe ngodya yopendekeka mu bolodi.
11.pcb kutentha pakati lakuya mapindikidwe chifukwa ngakhale malata.
12. PCB bolodi kuwotcherera ngodya, theoretically wamkulu ngodya, zolumikizira solder mu yoweyula yoweyula ku mafunde pamaso ndi pambuyo olowa solder ku funde pamene mwayi wamba padziko ndi ang'onoang'ono, mwayi wa mlatho ndi ang'onoang'ono.Komabe, mbali ya soldering imatsimikiziridwa ndi kunyowetsa makhalidwe a solder palokha.Nthawi zambiri, ngodya ya lead soldering imatha kusintha pakati pa 4 ° ndi 9 ° kutengera kapangidwe ka PCB, pomwe soldering yopanda lead imatha kusintha pakati pa 4 ° ndi 6 ° kutengera kapangidwe ka kasitomala ka PCB.Tikumbukenso kuti mbali yaikulu ya ndondomeko kuwotcherera, kutsogolo kutsogolo kwa PCB dip malata adzaoneka kudya malata kusowa malata pa zinthu, amene amayamba chifukwa cha kutentha kwa bolodi PCB pakati pa concave, ngati zinthu ziyenera kukhala zoyenera kuchepetsa kuwotcherera ngodya.
13. pakati pa ziwiya dera bolodi osati kukana solder damu, pambuyo kusindikiza pa solder phala chikugwirizana;kapena bwalo dera lokha lakonzedwa kukana solder damu / mlatho, koma chomalizidwa mu gawo kapena zonse, ndiyenso zosavuta ngakhale malata.
Nthawi yotumiza: Nov-02-2022