Njira zochizira pamwamba za PCB bolodi

1. Mbale yamkuwa yosalala

Ubwino ndi zovuta zake ndizodziwikiratu:

Ubwino: mtengo wotsika, malo osalala, kuwotcherera kwabwino (pakalibe makutidwe ndi okosijeni).

Zoyipa: zosavuta kukhudzidwa ndi asidi ndi chinyezi, sizingasungidwe kwa nthawi yayitali, ziyenera kugwiritsidwa ntchito patadutsa maola awiri mutamasula, chifukwa mkuwa umasungunuka mosavuta mukamayatsidwa mphepo; Sangagwiritsidwe ntchito pazowonjezera ziwiri chifukwa mbali yachiwiri imakhala ndi oxidized pambuyo poyatsira koyamba. Ngati pali malo oyeserera, phala la solder liyenera kusindikizidwa kuti lipewe makutidwe ndi okosijeni, apo ayi kukhudzana ndi kafukufuku sikungakhale bwino.

Mkuwa wangwiro umakhala ndi oxidized mosavuta ikakhala kuti ili pamlengalenga ndipo iyenera kukhala ndi zotchinga pamwambapa. Ndipo anthu ena amaganiza kuti golidi ndi mkuwa, zomwe sizowona, chifukwa ndiye zotchinga pamwamba pamkuwa. Chifukwa chake mumafunikira gawo lalikulu lokutira golide pa board board, ndiye kuti ndinakutengani kuti mumvetsetse momwe golide amayendera.

Awiri, mbale yagolide

Golide ndiye golidi weniweni. Ngakhale chovala chochepa kwambiri chimakhala pafupifupi 10% yamitengo ya board. Ku Shenzhen, pali amalonda ambiri omwe amagwiritsa ntchito njira zina zotsuka golide, ndiye ndalama zambiri. Kugwiritsa ntchito golide ngati zokutira, imodzi ndikuthandizira kuwotcherera, inayo ndikuteteza kutu. Ngakhale atatero

Zala zagolide zazokumbukira zaka zingapo zimakhalabe zonyezimira monga momwe zimakhalira pamene zidapangidwa ndi mkuwa, aluminium ndi chitsulo, zomwe tsopano zimakhala dzimbiri kukhala milu yopanda kanthu.

Chosanjikiza chagolide chimagwiritsidwa ntchito kwambiri m’magawo azipangizo zoyendera dera, zala zagolide, cholumikizira chachingwe ndi malo ena. Mukawona kuti board board ndi siliva, zomwe sizoyenera kunena, imbani foni kwa ogula ufulu, ndiye wopanga ma jerry, sanagwiritse ntchito bwino zida, ndi zitsulo zina zimanyenga makasitomala. Timagwiritsa ntchito bolodi yama board yama board yayikulu kwambiri makamaka mbale yagolide, mbale yagolide yolowa, mavabodi apakompyuta, ma audio ndi bolodi laling’ono lama digito nthawi zambiri samakhala golide.

Ubwino ndi zovuta zakuzama kwa golide sikovuta kubwera ku:

Ubwino: sikophweka kusungunuka, imatha kusungidwa kwa nthawi yayitali, pamwamba pake ndiyosalala, yoyenera kuwotcherera zikhomo zazing’ono zazing’ono ndi zida zophatikizika ndi ziwalo zazing’ono za solder. Bokosi la PCB lokonda kiyi (mwachitsanzo bolodi lam’manja). Reflow soldering imatha kubwerezedwa kangapo popanda kutayika kwambiri. Itha kugwiritsidwa ntchito ngati maziko a COB (Chip On Board) cabling.

Zoyipa: kukwera mtengo, kuthekera kosawuka bwino, chifukwa chogwiritsa ntchito njira yolumikizira faifi tambala, kumakhala kosavuta kukhala ndi mavuto mbale yakuda. Chosanjikiza cha faifi tambala chimasungika m’kupita kwanthawi, ndipo kudalirika kwanthawi yayitali ndi vuto.

Tsopano kodi tikudziwa kuti golide ndi golide ndipo siliva ndi siliva? Inde sichoncho. Tin.

Atatu, utsi malata bolodi dera

Mbale zasiliva zimatchedwa mbale za tinjet. Kupopera tini pazitsulo zamkuwa kungathandizenso kuwotcherera. Koma sizimapereka kudalirika kofananira kwakanthawi kofanana ndi golide. Palibe zomwe zingakhudze zinthu zomwe zimagulitsidwa, koma kudalirika sikokwanira mapadi omwe amakhala kunja kwa mpweya kwanthawi yayitali, monga mapadi apansi, zokhazikapo masika, ndi zina zambiri. Kugwiritsa ntchito nthawi yayitali kutulutsa makutidwe ndi okosijeni kosavuta, komwe kumabweretsa kukhudzana kosavomerezeka. Amagwiritsidwa ntchito ngati bolodi laling’ono lazogulitsa zamagetsi, kupatula kuti ndi tinjet board, chifukwa chake ndi chotchipa.

Ubwino wake ndi zovuta zake zidafotokozedwa motere:

Ubwino: mtengo wotsika, magwiridwe antchito abwino.

Zoyipa: Sizoyenera kupanga zikhomo zopyapyala ndi zigawo zing’onozing’ono, chifukwa chakuyang’ana pang’ono kwa mbale ya tinjet. Pogwiritsa ntchito PCB, ndikosavuta kutulutsa mkanda wa solder ndikupangitsa kufupika kwa zigawo zabwino. Pogwiritsidwa ntchito munjira ya SMT ya mbali ziwiri, chifukwa mawonekedwe achiwiri amakhala otenthetsera kutentha kwambiri, ndikosavuta kusungunula kupopera tini ndikupanga mikanda yazunguliro yazitsulo kapena mikanda yamadzi yofananira yomwe ikudontha ndi mphamvu yokoka, zomwe zimapangitsa zosagwirizana pamwamba ndikukhudzidwa ndi mavuto owotcherera.

M’mbuyomu, tidakambirana za bolodi yoyenda yotsika mtengo kwambiri, yoyatsira magetsi yopatula gawo lamkuwa

Zinayi, bolodi la OSP

Kanema wothandizira wowotcherera. Chifukwa ndi organic, osati chitsulo, ndi yotsika mtengo kuposa kupopera mankhwala.

Ubwino: Ndi maubwino onse a kuwotcherera kopanda mkuwa, ma board omwe atha ntchito amathanso kukonzedwa.

Zoyipa: Amakhala ndi asidi komanso chinyezi. Pankhani ya kuwotcherera kwachiwiri, nthawi yofunikira kumaliza kumaliza kuwotcherera kwachiwiri nthawi zambiri imakhala yoperewera. Ngati yasungidwa kwa miyezi yopitilira itatu, iyenera kuyikidwanso. Gwiritsani ntchito pasanathe maola 24 mutatsegula phukusi. OSP ndiyosanjikiza, kotero malo oyeserera ayenera kusindikizidwa ndi phala la solder kuti achotse choyika choyambirira cha OSP kuti alumikizane ndi singano poyeserera magetsi.

Ntchito yokhayo pafilimuyi ndikuwonetsetsa kuti zojambulazo zamkati zamkati sizikhala ndi oxidize isanachitike. Kanemayo amasanduka nthunzi akangotenthedwa pakamawotcheredwa. Solder itha kugwiritsidwa ntchito kupotera mawaya amkuwa kuzinthu zina.

Koma sikuti imagonjetsedwa ndi dzimbiri. Bolodi lapa OSP, lotseguka mphepo kwa masiku opitilira khumi, silingathe kuwotcherera zinthu.

Mabodi ambiri amama kompyuta amagwiritsa ntchito ukadaulo wa OSP. Chifukwa bolodi la dera ndi lalikulu kwambiri kuti lingakwanitse kugula golide.