Kodi kuwotcherera kwa BGA ndi chiyani

zonse zokha

BGA kuwotcherera, mophweka ndi chidutswa cha phala ndi BGA zigawo zikuluzikulu za bolodi dera, kudzerareflow uvunindondomeko kukwaniritsa kuwotcherera.Pamene BGA ndi kukonzedwa, ndi BGA ndi welded ndi dzanja, ndi BGA ndi disassembled ndi welded ndi BGA kukonza tebulo ndi zida zina.
Malingana ndi kutentha kwapakati,makina opangira zitsuloAtha kugawidwa m'magawo anayi: malo otenthetsera kutentha, malo osungira kutentha, malo otulukanso ndi malo ozizira.

1. Preheating zone
Zomwe zimadziwikanso kuti ramp zone, zimagwiritsidwa ntchito kukweza kutentha kwa PCB kuchokera pa kutentha kozungulira mpaka kutentha komwe kumafunikira.M'chigawo chino, bolodi la dera ndi chigawocho chimakhala ndi mphamvu zosiyana za kutentha, ndipo kutentha kwawo kwenikweni ndi kosiyana.

2. Malo osungira kutentha
Nthawi zina amatchedwa malo owuma kapena amvula, malowa nthawi zambiri amakhala 30 mpaka 50 peresenti ya malo otentha.Cholinga chachikulu cha zone yogwira ndikukhazikitsa kutentha kwa zigawo pa PCB ndikuchepetsa kusiyana kwa kutentha.Lolani nthawi yokwanira m'derali kuti gawo la mphamvu ya kutentha ligwirizane ndi kutentha kwa gawo laling'ono ndikuwonetsetsa kuti kutuluka kwa solder phala kumasungunuka.Kumapeto kwa chigawo chogwira ntchito, ma oxides pa mapepala, mipira ya solder, ndi zikhomo zamagulu amachotsedwa, ndipo kutentha kwa bolodi lonse kumakhala koyenera.Tikumbukenso kuti zigawo zonse pa PCB ayenera kutentha chimodzimodzi kumapeto kwa zone, apo ayi kulowa m'dera reflux adzachititsa zochitika zosiyanasiyana zoipa kuwotcherera chifukwa cha kutentha m'mbali mbali iliyonse.

3. Reflux zone
Nthawi zina amatchedwa nsonga kapena zone yotentha yomaliza, chigawochi chimagwiritsidwa ntchito kukweza kutentha kwa PCB kuchoka pa kutentha kogwira mpaka kutentha komwe kumalimbikitsidwa.Kutentha kwachangu nthawi zonse kumakhala kotsika pang'ono kusiyana ndi malo osungunuka a alloy, ndipo kutentha kwapamwamba kumakhala nthawi zonse kusungunuka.Kuyika kutentha m'derali kumapangitsa kuti kutentha kupitirire 2 ~ 5 ℃ pa sekondi imodzi, kapena kupangitsa kutentha kwa reflux kukhala kokulirapo kuposa momwe tikulimbikitsidwa, kapena kugwira ntchito motalika kwambiri kungayambitse kupunduka, kufowoka kapena kuwotcha. PCB, ndikuwononga kukhulupirika kwa zigawozo.Kutentha kwapamwamba kwa reflux kumakhala kotsika kusiyana ndi kovomerezeka, ndipo kuwotcherera kozizira ndi zolakwika zina zikhoza kuchitika ngati nthawi yogwira ntchito ndi yochepa kwambiri.

4. Malo ozizira
The tini aloyi ufa wa solder phala mu chigawo ichi wasungunuka ndi kunyowetsa bwino pamwamba kuti alumikizike ndipo ayenera utakhazikika mwamsanga kuti atsogolere mapangidwe aloyi makhiristo, wonyezimira wolumikizana solder, mawonekedwe abwino ndi otsika kukhudza Angle. .Kuzizira kwapang'onopang'ono kumapangitsa kuti zonyansa zambiri za bolodi zilowe mu malata, zomwe zimapangitsa kuti madontho azikhala osawoneka bwino.Zikavuta kwambiri, zimatha kuyambitsa kusamata bwino kwa malata komanso kufooka kwa mgwirizano wa solder.

 

NeoDen imapereka mayankho athunthu a mzere wa SMT, kuphatikiza uvuni wa SMT reflow, makina osokera, makina osankha ndi malo, makina osindikizira a solder, PCB loader, PCB unloader, chip mounter, SMT AOI makina, makina a SMT SPI, makina a SMT X-Ray, Zida zopangira msonkhano wa SMT, Zida zopangira PCB SMT zida zosinthira, ndi zina zilizonse makina a SMT omwe mungafune, chonde titumizireni kuti mumve zambiri:

 

Malingaliro a kampani Zhejiang NeoDen Technology Co., Ltd

Imelo:info@neodentech.com


Nthawi yotumiza: Apr-20-2021

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