Yakadzama PCBA yekugadzira maitiro (kusanganisira SMT maitiro), huya uone!
01."SMT Process Flow"
Reflow welding inoreva yakapfava brazing process iyo inoziva iyo mechanic uye yemagetsi kubatana pakati pekupedzisira-welding chikamu chepamusoro-chakaunganidzwa chikamu kana pini nePCB pad nekunyungudutsa solder paste yakadhindwa paPCB pad.Iyo nzira inoyerera ndeye: kudhinda solder paste - chigamba - reflow welding, sezvakaratidzwa mumufananidzo uri pazasi.
1. Solder paste kudhinda
Chinangwa ndechekuisa huwandu hwakakodzera hwesolder paste zvakaenzana pane solder pad yePCB kuve nechokwadi chekuti zvigamba zvechigamba uye zvinoenderana neiyo PCB solder pad inoyerera zvakare welded kuti iwane yakanaka yemagetsi kubatana uye kuve neyakakwana simba remagetsi.Nzira yekuona sei kuti solder paste inoshandiswa zvakaenzana kune imwe neimwe pad?Tinofanira kugadzira simbi mesh.Iyo solder paste yakavharwa zvakaenzana pane imwe neimwe solder pad pasi pechiito che scraper kuburikidza nemakomba anoenderana musimbi mesh.Mienzaniso yesimbi mesh diagram inoratidzwa mumufananidzo unotevera.
Solder paste kudhinda diagram inoratidzwa mumufananidzo unotevera.
Iyo yakadhindwa solder paste PCB inoratidzwa mumufananidzo unotevera.
2. Chigamba
Iyi nzira ndeyekushandisa muchina wekumisikidza kunyatso simudza zvikamu zve chip kunzvimbo inoenderana nePCB pamusoro peiyo yakadhindwa solder paste kana chigamba glue.
SMT michina inogona kukamurwa kuita mhando mbiri zvichienderana nemabasa avo:
Muchina wepamusoro-wepamusoro: wakakodzera kukwirisa nhamba huru yezvikamu zvidiki: senge capacitors, resistors, nezvimwe, zvinogona zvakare kukwira zvimwe zvikamu zveIC, asi iko kurongeka kwakaganhurirwa.
B Universal muchina: wakakodzera kukwirisa bonde rakapesana kana yakakwirira chaiyo zvikamu: seQFP, BGA, SOT, SOP, PLCC zvichingodaro.
Dhiyagiramu yemidziyo yemuchina weSMT inoratidzwa mumufananidzo unotevera.
Iyo PCB mushure mechigamba inoratidzwa mumufananidzo unotevera.
3. Reflow welding
Reflow Soldring ishanduro chaiyo yeChirungu Reflow soldring, inova yemagetsi uye yemagetsi kubatanidza pakati pezvikamu zvegungano repamusoro nePCB solder pad nekunyungudutsa solder paste pane redunhu board solder pad, ichigadzira dunhu remagetsi.
Reflow welding inzira yakakosha mukugadzirwa kweSMT, uye inonzwisisika tembiricha curve kuseta ndiyo kiyi yekuvimbisa kunaka kwekuyerera kwewelding.Kusaita tembiricha curves inokonzeresa PCB welding defects senge isina kukwana welding, virtual welding, component warping, uye akawandisa solder mabhora, izvo zvinokanganisa kunaka kwechigadzirwa.
Iyo dhayagiramu yemidziyo ye reflow welding furnace inoratidzwa mumufananidzo unotevera.
Mushure me reflow choto, iyo PCB inopedzwa nereflow welding inoratidzwa mumufananidzo uri pazasi.