Kungani i-SMT idinga ithreyi ye-ovini egeleza kabusha enenkampani yenethiwekhi egcwele?

I-oven ye-SMT egeleza kabushaiyithuluzi lokudambisa elibalulekile enqubweni ye-SMT, empeleni eyinhlanganisela kahhavini wokubhaka.Umsebenzi wayo oyinhloko ukuvumela i-solder yokunamathisela kuhhavini yokugeleza kabusha, i-solder izoncibilika emazingeni okushisa aphezulu ngemuva kokuthi i-solder ingenza izingxenye ze-SMD namabhodi wesifunda ndawonye emshinini wokushisela.Ngaphandle kwe-SMT reflow soldering equipment inqubo ye-SMT ayinakuqedwa ukuze izingxenye ze-electronic kanye nebhodi lesifunda lisebenze.Futhi i-SMT phezu kwethreyi ye-ovini iyithuluzi elibaluleke kakhulu lapho umkhiqizo uphezu kokuphinda ufakwe emanzini, bheka lapha ungase ube nemibuzo ethile: I-SMT phezu kwethreyi kahhavini iyini?Iyini inhloso yokusebenzisa amathreyi e-SMT noma abathwali be-overbake?Nakhu ukubheka ukuthi liyini ngempela ithreyi ye-SMT overbake.

1. Liyini ithreyi ye-overbake ye-SMT?

Okubizwa ngokuthi ithreyi ye-SMT over-burner noma isithwali sokushisa ngokweqile, empeleni, sisetshenziselwa ukubamba i-PCB bese siyiyisa ngemuva kuthreyi yesithando somlilo noma umthwali.Isithwali sethreyi sivamise ukuba nekholomu yokuma esetshenziselwa ukulungisa i-PCB ukuyivimbela ukuthi isebenze noma igugeke, ezinye zenkampani yenethiwekhi yethreyi ethuthuke kakhulu zizongeza ikhava, ngokuvamile eye-FPC, futhi ifake omagnet, landa ithuluzi lapho inkomishi yokumunca iqinisa. nge, ngakho-ke i-SMT chip processing plant ingagwema ukuguqulwa kwe-PCB.

2. Ukusetshenziswa kwe-SMT phezu kwethreyi yehhavini noma ngaphezulu kwenhloso yesithwali sehhavini

Ukukhiqizwa kwe-SMT lapho usebenzisa phezu kwethreyi ye-ovini ukunciphisa ukuguquguquka kwe-PCB nokuvimbela izingxenye ezikhuluphele ngokweqile, zombili ezihlotshaniswa ngempela ne-SMT emuva endaweni yokushisa ephezulu yesithando somlilo, kumikhiqizo eminingi eminingi manje esebenzisa inqubo engenamthofu. , izinga lokushisa elincibilikisiwe lethayela le-SAC305 le-solder elingenamthofu lika-217 ℃, kanye nezinga lokushisa lethini elincibilikisiwe le-SAC0307 le-solder lehla cishe ngo-217 ℃ ~ 225 ℃, izinga lokushisa eliphakeme kakhulu elibuyela ku-solder ngokuvamile Kunconywa phakathi kuka-240 ~ 250 ℃ , ngokuvamile sikhetha ipuleti le-FR4 le-Tg150 ngenhla.Okusho ukuthi, lapho i-PCB ingena endaweni yokushisa ephezulu yesithando somlilo, empeleni, sekuyisikhathi eside idlula izinga lokushisa lokudlulisa ingilazi endaweni yenjoloba, isimo senjoloba se-PCB sizokhubazeka kuphela ukuze sibonise izici zayo ezibonakalayo nje. kwesokudla.

Kuhambisana nokuncipha kogqinsi lwebhodi, kusukela kugqinsi olujwayelekile luka-1.6mm lwehle luye ku-0.8mm, ngisho no-0.4mm PCB, ibhodi lesifunda elincanyana kangaka lapho kubhapathizwa izinga lokushisa eliphezulu ngemva kwesithando somlilo, kulula ngenxa yokuphakama okukhulu. izinga lokushisa kanye nenkinga ye-deformation yebhodi.

I-SMT phezu kwethreyi ye-ovini noma phezu kwesithwali sehhavini ukunqoba ukuguquguquka kwe-PCB nezingxenye eziwayo futhi zivele, ngokuvamile isebenzisa insika yokumisa ukulungisa imbobo yokubeka i-PCB, epuletini izinga lokushisa eliphakeme lokuguqulwa ukuze kugcinwe kahle ukuma kwe-PCB. ukuze kuncishiswe ukuguqulwa kwepuleti, yiqiniso, kufanele kube neminye imigoqo ukusiza indawo ephakathi kwepuleti ngenxa yomthelela wamandla adonsela phansi angase agobe inkinga yokucwila.

Ngaphezu kwalokho, ungasebenzisa futhi isithwali sokulayishwa ngokweqile akulula ukuguqula izici zokuklama izimbambo noma amaphuzu okusekela ngezansi kwezingxenye ezikhuluphele ukuze uqinisekise ukuthi izingxenye aziwi inkinga, kodwa ukuklama kwalesi sithwali kufanele kube kakhulu. qaphela ukugwema amaphuzu ukwesekwa ngokweqile ukuphakamisa izingxenye ezibangelwa ohlangothini lwesibili ukungalungi inkinga solder unama ukuphrinta kwenzeka.