Kodi kuchepetsa mavuto padziko ndi mamasukidwe akayendedwe mu PCBA soldering?

I. Njira zosinthira kugwedezeka kwapamtunda ndi kukhuthala

Kukhuthala kwa ma viscosity ndi kugwedezeka kwapamwamba ndizofunikira za solder.Wogulitsa wabwino kwambiri ayenera kukhala ndi kukhuthala kochepa komanso kugwedezeka kwapamtunda pamene akusungunuka.Kuvutana kwapamtunda ndi momwe zinthu zilili, sizingathetsedwe, koma zimatha kusinthidwa.

1.The waukulu miyeso kuchepetsa mavuto padziko ndi mamasukidwe akayendedwe mu PCBA soldering ndi motere.

Wonjezerani kutentha.Kukweza kutentha kungawonjezere mtunda wa maselo mkati mwa solder yosungunuka ndi kuchepetsa mphamvu yokoka ya mamolekyu mkati mwa solder yamadzimadzi pamtunda wa mamolekyu.Choncho, kukweza kutentha kungachepetse mamasukidwe akayendedwe ndi kugwedezeka kwapansi.

2. Kuthamanga kwapamwamba kwa Sn ndipamwamba, ndipo kuwonjezera kwa Pb kungachepetse kugwedezeka kwapamwamba.Onjezani zomwe zili mu lead mu Sn-Pb solder.Zomwe zili mu Pb zikafika 37%, kupsinjika kwapamwamba kumachepa.

3. Kuonjezera wothandizira.Izi zingathe kuchepetsa kugwedezeka kwa pamwamba pa solder, komanso kuchotsa pamwamba pa oxide wosanjikiza wa solder.

Kugwiritsa ntchito nayitrogeni chitetezo pcba kuwotcherera kapena zingalowe kuwotcherera akhoza kuchepetsa mkulu-kutentha makutidwe ndi okosijeni ndi kusintha wettability.

II.udindo wa kusamvana pamwamba pa kuwotcherera

Kuthamanga kwapamtunda ndi mphamvu yonyowa mosiyana, kotero kugwedezeka kwapamwamba ndi chimodzi mwa zinthu zomwe sizingathandize kunyowetsa.

Kayareflowuvuni, wave solderingmakinakapena solder manual, kupsyinjika pamwamba pa mapangidwe abwino a solder ndi zinthu zoipa.Komabe, mu SMT kuyika ndondomeko reflow soldering pamwamba mavuto angagwiritsidwe ntchito kachiwiri.

Pamene solder phala ifika kutentha kusungunuka, pansi pa zochita za kusamvana kwabwino pamwamba, kutulutsa mphamvu yodziyimira pawokha ( Self Alignment), ndiko kuti, pamene malo oyika gawo ali ndi kupatuka kwazing'ono, pansi pa kugwedezeka kwapamwamba, chigawocho akhoza basi anakokera kumbuyo kwa pafupifupi chandamale malo.

Chifukwa chake kugwedezeka kwapamtunda kumapangitsa kuyambiranso kuyenda kuti kuyika zofunikira kukhala zotayirira, zosavuta kuzindikira makina apamwamba komanso liwiro lalikulu.

Panthawi imodzimodziyo ndi chifukwa chakuti "kubwereranso" ndi khalidwe la "self-location effect", SMT re-flow soldering process object pad design, chigawo chokhazikika ndi zina zotero zimakhala ndi pempho lolimba kwambiri.

Ngati mavuto padziko si bwino, ngakhale makhazikitsidwe udindo ndi zolondola kwambiri, pambuyo kuwotcherera adzaonekanso gawo udindo kuchepetsa, kuyimirira chipilala, mlatho ndi zofooka zina kuwotcherera.

Pamene yoweyula soldering, chifukwa cha kukula ndi kutalika kwa SMC/SMD chigawo thupi palokha, kapena chifukwa cha mkulu chigawo kutsekereza chigawo chachifupi ndi kutsekereza tini obwera funde funde, ndi zotsatira mthunzi chifukwa cha mavuto padziko lalata yoweyula. otaya, ndi solder madzi sangakhoze analowerera kumbuyo kwa chigawo thupi kupanga otaya kutsekereza dera, chifukwa kutayikira wa solder.

Makhalidwe aNeoDen IN6 Reflow Soldering makina

NeoDen IN6 imapereka kutsekemera koyenera kwa opanga PCB.

Mapangidwe apamwamba a tebulo la mankhwala amachititsa kuti ikhale yankho langwiro la mizere yopangira ndi zofunikira zosiyanasiyana.Zapangidwa ndi makina opangira mkati omwe amathandiza ogwira ntchito kupereka ma soldering osavuta.

Chitsanzo chatsopanocho chadutsa kufunikira kwa chowotcha cha tubular, chomwe chimapereka ngakhale kutentha kwa kutenthamu uvuni wa reflow lonse.Ndi soldering PCBs ngakhale convection, zigawo zonse ndi usavutike mtima pa mlingo womwewo.

Kapangidwe kake kamagwiritsa ntchito mbale yotenthetsera ya aluminiyamu yomwe imawonjezera mphamvu zamagetsi.Dongosolo losefera utsi lamkati limapangitsa kuti zinthu ziziwayendera bwino komanso zimachepetsa kutulutsa koyipa.

Mafayilo ogwira ntchito amasungidwa mkati mwa uvuni, ndipo mawonekedwe onse a Celsius ndi Fahrenheit amapezeka kwa ogwiritsa ntchito.Uvuni umagwiritsa ntchito gwero lamphamvu la 110/220V AC ndipo kulemera kwake kwa 57kg.

NeoDen IN6 imamangidwa ndi chipinda chotenthetsera cha aluminiyamu.