Pakuti SMT bolodi, makamaka kwa BGA ndi IC anaika pa zofunika conduction ayenera mlingo kutali, pulagi dzenje otukukira otukukira concave kuphatikiza kapena kuchotsera 1 mil, sangakhale ndi kalozera dzenje m'mphepete pa malata wofiira, kalozera dzenje ndi Tibetan mikanda, kuti akwaniritse zofunika kasitomala, kuchititsa pulagi dzenje ndondomeko multifarious, mwapadera yaitali ndondomeko otaya, ndondomeko kulamulira zovuta, nthawi zambiri mu otentha mpweya kusalaza ndi wobiriwira kukana mafuta soldering kuyesera kutali;Pambuyo pochiritsa, kuphulika kwa mafuta ndi mavuto ena kumachitika.Malinga ndi momwe zinthu zimapangidwira, njira zosiyanasiyana zamapulagi za PCB zimafotokozedwa mwachidule, ndipo ndondomekoyi ndi ubwino ndi kuipa kwake zimafaniziridwa ndikufotokozedwa:
Zindikirani: Mfundo yogwiritsira ntchito kutentha kwa mpweya ndi kugwiritsa ntchito mpweya wotentha kuchotsa solder yochuluka pamwamba ndi dzenje la bolodi losindikizidwa, ndipo solder yotsalayo imaphimbidwa mofanana pa pad ndi mzere wotseguka wa solder ndi zokongoletsera pamwamba pa chisindikizo, chomwe ndi chimodzi. za njira zochizira pamwamba pa bolodi losindikizidwa.
I. Pulagi dzenje ndondomeko pambuyo yotentha mpweya kusanja
Njira yoyendetsera: mbale yotchinga kuwotcherera →HAL→ plug dzenje → kuchiritsa.Njira yopanda mapulagi imatengedwa kuti ipangidwe.Pambuyo pakuyatsa mpweya wotentha, mbale ya aluminiyamu yotchinga kapena inki yotchinga imagwiritsidwa ntchito kumaliza mabowo a pulagi a linga zonse monga momwe makasitomala amafunira.Pulagi dzenje inki akhoza kukhala tcheru inki kapena thermosetting inki, pofuna kuonetsetsa kugwirizana kwa chonyowa filimu mtundu, pulagi dzenje inki bwino ntchito ndi bolodi inki chomwecho.Izi zitha kuwonetsetsa kuti kutentha kwa mpweya pambuyo pa dzenje sikugwetsa mafuta, koma kosavuta kuyambitsa pulagi dzenje kuipitsidwa kwa bolodi pamwamba, mosagwirizana.Makasitomala amakonda kuwotcherera pafupifupi akamagwiritsa ntchitomakina a SMTkukwera (makamaka mu BGA).Makasitomala ambiri savomereza njira iyi.
II.Kutentha kwa mpweya musanayambe pulagi dzenje ndondomeko
2.1 Zithunzi kutengerapo ikuchitika pambuyo pulagi dzenje, kulimba ndi akupera a aluminiyamu pepala
Izi ndondomeko ndi CNC pobowola makina, pobowola kunja pulagi dzenje zotayidwa pepala, zopangidwa chophimba, dzenje pulagi, kuonetsetsa kuti pulagi dzenje zonse pulagi dzenje, pulagi dzenje inki pulagi dzenje inki, lilipo thermosetting inki, makhalidwe ake ayenera kukhala kuuma, Kusintha kwa resin shrinkage ndikochepa, ndipo mphamvu yomangira khoma ndi yabwino.Njira yoyendetserayi ili motere: pretreatment → pulagi dzenje → mbale yopera → kujambula zithunzi → etching → kuwotcherera mbale pamwamba kukana
Mwa njira imeneyi akhoza kutsimikizira conduction yosalala ya pulagi dzenje, kutentha mpweya kukweza sipadzakhala mafuta, mbali ya dzenje kuphulika pa mavuto khalidwe monga mafuta, koma ndondomeko chofunika disposable thickening mkuwa, kupanga dzenje khoma mkuwa makulidwe kukumana. kasitomala muyezo, kotero gulu lonse mkulu kufunika kwa plating mkuwa, komanso ali ndi chofunika mkulu pa ntchito ya makina akupera, kuonetsetsa kuti utomoni pamwamba mkuwa bwino kuchotsa, monga mkuwa pamwamba ndi woyera osati zaipitsidwa. .Ambiri PCB zomera alibe nthawi imodzi thickening mkuwa ndondomeko, ndi ntchito zida si kwa zofunika, chifukwa ndondomeko si ntchito zomera PCB.
2.2 Tsekani kuwotcherera kwa bolodi yosindikizira pazenera molunjika pambuyo pa dzenje la aluminium pepala
Njirayi imagwiritsa ntchito makina obowola NUMERICAL kuwongolera, kubowola pepala lotayirira kuti mutseke dzenje, lopangidwa kukhala mawonekedwe azithunzi, omwe adayikidwa pabowo la pulagi yamakina osindikizira, akamaliza kuyimitsa dzenje la pulagi sadzapitirira mphindi 30, ndi chophimba cha 36T. Screen mwachindunji kusindikiza bolodi pamwamba kukana kuwotcherera, ndondomeko ndondomeko ndi: pretreatment - pulagi dzenje - chophimba kusindikiza - pre kuphika - kukhudzana - chitukuko - kuchiritsa
Ndi ndondomekoyi akhoza kuonetsetsa kuti conduction dzenje chivundikiro mafuta ndi zabwino, pulagi dzenje lathyathyathya, chonyowa filimu mtundu n'zogwirizana, otentha mpweya mlingo angatsimikizire kuti dzenje conduction si malata, malata mikanda si zobisika mu dzenje, koma zosavuta chifukwa. pad inki mu dzenje pambuyo kuchiritsa, chifukwa osauka solderability;Pambuyo pa kutentha kwa mpweya, m'mphepete mwa bowolo mumatulutsa thovu ndikugwetsa mafuta.Ndizovuta kugwiritsa ntchito njirayi pakuwongolera kupanga, ndipo ndikofunikira kuti akatswiri opanga ma process atengere njira zapadera ndi magawo kuti atsimikizire mtundu wa dzenje la pulagi.
2.3 Aluminiyamu pulagi dzenje, chitukuko, precuring, akupera mbale pamwamba kuwotcherera.
Ndi CNC pobowola makina, pobowola pepala zotayidwa chofunika pulagi dzenje, anapanga mu nsalu yotchinga, anaika pa kusintha zenera kusindikiza makina pulagi dzenje, pulagi dzenje ayenera kukhala wodzaza, mbali zonse za otuluka bwino, ndiyeno pambuyo kuchiritsa, akupera mbale pamwamba. mankhwala, ndondomeko ndi: pretreatment - pulagi dzenje kuyanika chisanadze - kupanga - pre-kuchiritsa - pamwamba kuwotcherera
Popeza kuchiritsa bowo la pulagi munjira iyi kumatha kuonetsetsa kuti mafuta sagwetsa kapena kuphulika pabowo pambuyo pa HAL, koma mikanda ya malata yobisika mu dzenje ndi malata padzenje pambuyo pa HAL sangathe kuthetsedwa, makasitomala ambiri savomereza.
2.4 Kuwotcherera kwa block ndi dzenje la pulagi zimamalizidwa nthawi imodzi.
Njirayi imagwiritsa ntchito chophimba cha 36T (43T), chomwe chimayikidwa pa makina osindikizira, kugwiritsa ntchito pad kapena bedi la msomali, pomaliza bolodi panthawi imodzimodziyo, podutsa pulagi, ndondomekoyi ndi: pretreatment - kusindikiza chophimba - kuyanika - kukhudzana - chitukuko - kuchiritsa.
The ndondomeko nthawi yochepa, mkulu zida magwiritsidwe, akhoza kutsimikizira pambuyo dzenje kunja mafuta, otentha mpweya kusanja kalozera dzenje si pa malata, koma chifukwa cha ntchito chophimba kusindikiza pulagi dzenje, mu dzenje kukumbukira ndi kuchuluka kwa mpweya, pamene kuchiritsa, kukwera mtengo kwa mpweya, kuthyola kukana kuwotcherera nembanemba, kukhala ndi mabowo, m'mabowo, m'malo otentha, mpweya wokhazikika udzatsogolera dzenje ndi lata pang'ono.
Nthawi yotumiza: Nov-16-2021