Gutunganya PCBA na SMT muri rusange bifite inzira ebyiri, imwe ni inzira itayoborwa naho ubundi ni inzira iyobowe.Buriwese azi ko kuyobora byangiza abantu.Kubwibyo, inzira idafite isuku yujuje ibisabwa byo kurengera ibidukikije, ibyo bikaba inzira rusange kandi guhitamo byanze bikunze mumateka..Ntabwo twibwira ko uruganda rutunganya PCBA munsi yikigereranyo (munsi yumurongo wa 20 SMT) rufite ubushobozi bwo kwakira ibicuruzwa bitunganyirizwa hamwe na sisitemu yo gutunganya SMT, kuko gutandukanya ibikoresho, ibikoresho, nibikorwa byongera cyane ikiguzi nikibazo y'ubuyobozi.Sinzi uburyo byoroshye gukora inzira-yubusa itaziguye.
Hasi, itandukaniro riri hagati yuburyo bwo kuyobora no kuyobora-bidafite inzira muri make muri make kuburyo bukurikira.Hariho bimwe bidahagije, kandi nizere ko ushobora kunkosora.

1. Ibigize ibinyamavuta biratandukanye: uburyo rusange bwo kuyobora tin-gurş igizwe ni 63/37, mugihe ibiyobora bidafite isuku ni SAC 305, ni ukuvuga Sn: 96.5%, Ag: 3%, Cu: 0.5%.Inzira idafite isasu ntishobora kwemeza rwose ko idafite isasu, gusa irimo ibintu bike cyane byiyobora, nka gurş munsi ya 500 PPM.

2. Ingingo zitandukanye zo gushonga: aho gushonga kwa tin-tin ni 180 ° ~ 185 °, naho ubushyuhe bwakazi bugera kuri 240 ° ~ 250 °.Ahantu ho gushonga amabati adafite isasu ni 210 ° ~ 235 °, naho ubushyuhe bwakazi ni 245 ° ~ 280 °.Ukurikije ubunararibonye, ​​kuri buri 8% -10% byiyongera mubirimo amabati, aho gushonga byiyongera kuri dogere 10, naho ubushyuhe bwakazi bukiyongera kuri dogere 10-20.

3. Igiciro kiratandukanye: igiciro cyamabati kirahenze kuruta icy'isasu.Mugihe uwagurishije kimwe kimwe asimbuwe namabati, igiciro cyumugurisha kizazamuka cyane.Kubwibyo, ikiguzi cyibikorwa bidafite isuku birarenze cyane ibyo kuyobora.Imibare irerekana ko amabati yo kugurisha imiraba hamwe ninsinga zamabati yo kugurisha intoki, inzira idafite isasu irikubye inshuro 2,7 kurenza iyambere, naho paste yo kugurisha kugurisha ibicuruzwa Igiciro cyiyongereyeho inshuro 1.5.

4. Inzira iratandukanye: inzira yo kuyobora hamwe nubusa-buyobora inzira irashobora kugaragara mwizina.Ariko umwihariko mubikorwa, uwagurishije, ibice, nibikoresho byakoreshejwe, nk'itanura ryo kugurisha imiraba, icapiro rya paste, hamwe nicyuma cyo kugurisha intoki, biratandukanye.Iyi nayo niyo mpamvu nyamukuru ituma bigoye gukemura inzira ziyobowe nizisohoka mu ruganda ruto rutunganya PCBA.

Ibindi bitandukanye nkibikorwa byidirishya, kugurishwa, nibisabwa kurengera ibidukikije nabyo biratandukanye.Idirishya ryibikorwa byo kuyobora ni binini kandi solderability izaba nziza.Ariko, kubera ko inzira idafite isuku irushaho kubungabunga ibidukikije, kandi ikoranabuhanga rikomeje gutera imbere, ikoranabuhanga ridafite inzira ryarushijeho kwizerwa no gukura.