PCBA

Tiyeni timvetsetse njira yopanga zamagetsi ya PCBA mwatsatanetsatane:

● Ma Stencing a Solder Paste

Choyamba, ndiKampani ya PCBAimagwiritsa ntchito solder phala pa bolodi losindikizidwa.Pochita izi, muyenera kuyika phala la solder pazigawo zina za bolodi.Chigawo chimenecho chimakhala ndi zigawo zosiyanasiyana.

Phala la solder ndilopangidwa ndi timipira tating'ono ting'onoting'ono tachitsulo.Ndipo, chinthu chomwe chimagwiritsidwa ntchito kwambiri mu solder phala ndi malata ie 96.5%.Zinthu zina za solder phala ndi siliva ndi mkuwa ndi 3% ndi 0.5% kuchuluka motero.

Wopanga amasakaniza phala ndi flux.Chifukwa flux ndi mankhwala omwe amathandiza solder kusungunuka ndi kugwirizana pamwamba pa bolodi.Muyenera kupaka solder phala pamalo enieni komanso mulingo woyenera.Wopanga amagwiritsa ntchito mapulogalamu osiyanasiyana pofalitsa phala m'malo omwe akufuna.

● Sankhani ndi Malo

Mukamaliza bwino gawo loyamba, makina osankha ndi malo ayenera kugwira ntchito ina.Pochita izi, opanga amayika zida zosiyanasiyana zamagetsi ndi ma SMD pa bolodi lozungulira.Masiku ano, ma SMD amayankha pazinthu zomwe sizimalumikizana ndi ma board.Muphunzira momwe mungagulitsire ma SMD awa pa bolodi pamasitepe omwe akubwera.

Mutha kugwiritsa ntchito njira zachikhalidwe kapena zodziwikiratu kuti musankhe ndikuyika zida zamagetsi pama board.Mwa njira yachikhalidwe, opanga amagwiritsa ntchito ma tweezers kuti aike zigawo pa bolodi.Mosiyana ndi izi, makina amayika zigawo pamalo oyenera munjira yodzipangira okha.

● Reflow Soldering

Pambuyo poyika zigawozo pamalo awo oyenera, opanga amalimbitsa phala la solder.Akhoza kukwaniritsa ntchitoyi kudzera mu ndondomeko ya "reflow".Pochita izi, gulu lopanga limatumiza matabwa ku lamba wotumizira.

gulu lopanga limatumiza matabwa ku lamba wotumizira.

Lamba wonyamulira uyenera kudutsa mu uvuni waukulu wotulukanso.Ndipo, ng'anjo ya reflow imakhala yofanana ndi uvuni wa pizza.Uvuni uli ndi ma heather angapo okhala ndi kutentha kosiyanasiyana.Kenako, heather kutentha matabwa pa kutentha osiyanasiyana 250 ℃-270 ℃.Kutentha uku kumasintha solder kukhala solder phala.

Mofanana ndi ma heater, lamba wotumizira kenako amadutsa muzoziziritsa zingapo.Zozizira zimalimbitsa phala m'njira yoyendetsedwa bwino.Pambuyo pa njirayi, zida zonse zamagetsi zimakhala pa bolodi molimba.

●Kuyendera ndi Kuwongolera Ubwino

Panthawi yobwezeretsanso, matabwa ena amabwera ndi kugwirizana kosauka kapena kukhala afupi.M'mawu osavuta, pakhoza kuchitika zovuta zolumikizana panthawi yapitayi.

Kotero pali njira zosiyanasiyana zowonera bolodi la dera kuti muwone zolakwika ndi zolakwika.Nazi njira zodziwika bwino zoyesera:

● Chongani Pamanja

Ngakhale m'nthawi ya kupanga ndi kuyesa makina, kuyang'ana pamanja kumakhalabe kofunika kwambiri.Komabe, kuyang'ana pamanja ndikothandiza kwambiri pa PCB PCBA yaying'ono.Chifukwa chake, njira iyi yowunikira imakhala yosalondola komanso yosatheka kwa bolodi yayikulu ya PCBA.

Kupatula apo, kuyang'ana zigawo za mgodi kwa nthawi yayitali kumakwiyitsa komanso kutopa kwamaso.Choncho zingayambitse kufufuza kolakwika.

● Automatic Optical Inspection

Pakuti mtanda waukulu wa PCB PCBA, njira iyi ndi imodzi mwa njira zabwino kwambiri zoyezetsa.Mwanjira iyi, makina a AOI amayendera ma PCB pogwiritsa ntchito makamera ambiri amphamvu kwambiri.

Makamerawa amaphimba ngodya zonse kuti ayang'ane zolumikizira zosiyanasiyana za solder.Makina a AOI amazindikira mphamvu zamalumikizidwe ndi kuwala konyezimira kochokera ku ma solder.Makina a AOI amatha kuyesa ma board mazana m'maola angapo.

● Kufufuza kwa X-Ray

Ndi njira inanso yoyesera ma board.Njirayi ndi yocheperapo koma yothandiza kwambiri pamagulu ozungulira ovuta kapena osanjikiza.X-ray imathandiza opanga kuti ayang'ane zovuta zapansi.

Pogwiritsa ntchito njira zomwe tatchulazi, ngati vuto liripo, gulu lopanga limatha kutumiza zomwezo kuti zibwezeretsedwe kapena kuchotsedwa.

Ngati kuyenderako sikunapeze cholakwika, chotsatira ndikuwunika momwe zimagwirira ntchito.Zikutanthauza kuti oyesa adzayang'ana ngati ntchito yake ikugwirizana ndi zofunikira kapena ayi.Chifukwa chake bolodi ingafunike kuyesedwa kuti iyese ntchito zake.

●Kuyika Chigawo cha Kupyolera-Hole

The zigawo zikuluzikulu pakompyuta zimasiyana bolodi ndi bolodi zimadalira mtundu wa PCBA.Mwachitsanzo, matabwa amatha kukhala ndi mitundu yosiyanasiyana ya zigawo za PTH.

Mabowo okulungidwa ndi mitundu yosiyanasiyana ya dzenje mu matabwa ozungulira.Pogwiritsa ntchito mabowowa, zigawo zomwe zili pa matabwa ozungulira zimatulutsa chizindikiro kuchokera kumagulu osiyanasiyana.Zida za PTH zimafunikira mitundu yapadera ya njira zogulitsira m'malo mogwiritsa ntchito phala lokha.

●Kuwotchera Pamanja

Njirayi ndi yophweka komanso yowongoka.Pa siteshoni imodzi, munthu m'modzi amatha kuyika gawo limodzi mu PTH yoyenera.Kenako, munthuyo adzadutsa bolodilo kupita ku siteshoni ina.Padzakhala masiteshoni ambiri.Pa siteshoni iliyonse, munthu amaika chigawo chatsopano.

Kuzungulira kumapitilira mpaka zigawo zonse zitayikidwa.Chifukwa chake njirayi ikhoza kukhala yayitali yomwe imadalira kuchuluka kwa zigawo za PTH.

●Wave Soldering

Ndi njira yodzipangira yokha ya soldering.Komabe, njira ya soldering ndi yosiyana kwambiri ndi njira iyi.Mwa njira iyi, matabwa amadutsa mu uvuni atavala lamba wonyamula katundu.Uvuni muli solder wosungunuka.Ndipo, solder yosungunuka imatsuka bolodi lozungulira.Komabe, mtundu woterewu wa soldering ndi wovuta kwambiri pamagulu awiri ozungulira.

●Kuyesa ndi Kufufuza Komaliza

Pambuyo pomaliza kugulitsa, ma PCBA amadutsa pakuwunika komaliza.Nthawi iliyonse, opanga amatha kudutsa matabwa ozungulira kuchokera pamasitepe am'mbuyomu kuti akhazikitse magawo owonjezera.

Kuyesa kogwira ntchito ndi mawu omwe amagwiritsidwa ntchito kwambiri pakuwunika komaliza.Mu sitepe iyi, oyesa amayika matabwa ozungulira maulendo awo.Kupatula apo, oyesa amayesa matabwa pansi pamikhalidwe yomwe dera lidzagwira ntchito.