Yini i-reflow oven?

Geza kabusha ihhaviniingenye yezinqubo ezintathu eziyinhloko kunqubo yokukhweza ye-SMT.Ngokuyinhloko isetshenziselwa ukuthengisa ibhodi lesifunda lezingxenye ezifakiwe.I-solder paste iyancibilika ngokufudumeza ukuze isici se-patch kanye nebhodi lebhodi le-solder pad kuhlanganiswe ndawonye.Ukuqondisisareflow soldering umshini, kufanele uqonde inqubo ye-SMT kuqala.

I-oven ye-NeoDen igeleza kabusha IN12

I-solder paste iyingxube ye-metal tin powder, i-flux namanye amakhemikhali, kodwa ithini elikulo likhona ngokuzimela njengobuhlalu obuncane.Lapho ibhodi le-PCB ngokusebenzisa izindawo eziningana zokushisa esithandweni sokugeleza kabusha, ngaphezu kwama-degrees Celsius angu-217, ubuhlalu obuncane bethini buncibilika.Ngemva kokuguquguquka nezinye izinto, ukuze izinhlayiya ezincane ezingenakubalwa zincibilike ndawonye, ​​okusho ukuthi, zenze lezo zinhlayiya ezincane zibuyele esimweni samanzi sokugeleza, le nqubo ngokuvamile kuthiwa i-reflux.I-Reflux isho ukuthi impushana kathini isuka kokuqinile yangaphambili ibuyele esimweni soketshezi, bese isuka endaweni yokupholisa ibuyele esimweni esiqinile futhi.

Isingeniso sendlela ye-reflow soldering
Okuhlukilereflow soldering umshiniinezinzuzo ezahlukene, futhi inqubo nayo ihlukile.
I-infrared reflow soldering: ukusebenza kahle kokushisa kwe-radiation conduction, ukukhuphuka kwezinga lokushisa okuphezulu, ukulawula ijika lokushisa kalula, izinga lokushisa le-PCB eliphezulu neliphansi kulula ukulawula lapho kushiselwa izinhlangothi ezimbili.Iba nomphumela wethunzi, izinga lokushisa alifani, kulula ukubangela izingxenye noma ukushiswa kwendawo kwe-PCB.
I-hot air reflow soldering: izinga lokushisa elilinganayo le-convection conduction, ikhwalithi enhle yokushisela.I-gradient yezinga lokushisa kunzima ukuyilawula.
Ukushiswa kwe-hot air reflow ngempoqo ihlukaniswe ngezinhlobo ezimbili ngokuya ngomthamo wayo wokukhiqiza:

Imishini yendawo yokushisa: ukukhiqizwa ngobuningi kulungele ukukhiqizwa okukhulu kwebhodi le-PCB elibekwe ebhandeni lokuhamba, ukuze lidlule endaweni ethile yokushisa engaguquki ukuze, indawo yokushisa encane kakhulu izoba khona isenzakalo sokushisa, ayifaneleki ukuhlanganiswa okuphezulu. ukushisela ipuleti.Iphinde ibe nkulu futhi idla ugesi omningi.
I-temperature zone imishini yedeskithophu encane: ukukhiqizwa kwe-batch encane nosayizi omaphakathi ucwaningo olusheshayo nokuthuthukiswa endaweni engaguquki, izinga lokushisa ngokwezimo ezimisiwe liyashintsha ngokuhamba kwesikhathi, ukusebenza kalula.Ukulungiswa kwezingxenye zangaphezulu ezingalungile (ikakhulukazi izingxenye ezinkulu) akufanelekile ukukhiqizwa ngobuningi.