Cov txheej txheem PCBA ntxaws ntxaws (nrog rau cov txheej txheem SMT), tuaj rau hauv thiab pom!
01 "SMT txheej txheem ntws"
Reflow welding yog hais txog cov txheej txheem mos brazing uas paub txog cov khoom siv thiab hluav taws xob sib txuas ntawm cov vuam kawg ntawm cov khoom sib dhos los yog tus pin thiab PCB ncoo los ntawm melting solder paste pre-printed ntawm PCB ncoo.Cov txheej txheem ntws yog: luam ntawv solder paste - thaj - reflow vuam, raws li qhia hauv daim duab hauv qab no.
1. Solder paste luam ntawv
Lub hom phiaj yog siv tus nqi tsim nyog ntawm solder paste tusyees ntawm cov ntaub qhwv ntawm PCB los xyuas kom meej tias cov khoom sib txuas thiab cov ntaub ntawv sib txuas ntawm PCB yog reflow welded kom ua tiav cov khoom siv hluav taws xob zoo thiab muaj zog txhua yam.Yuav ua li cas kom paub meej tias cov tshuaj txhuam hniav sib npaug rau txhua lub ncoo?Peb yuav tsum ua steel mesh.Lub solder paste yog sib npaug rau ntawm txhua daim ntaub qhwv ntsej nyob rau hauv qhov kev txiav txim ntawm tus scraper los ntawm cov qhov sib thooj hauv cov hlau mesh.Piv txwv ntawm steel mesh daim duab qhia hauv daim duab hauv qab no.
Solder paste printing daim duab qhia nyob rau hauv daim duab hauv qab no.
Cov luam ntawv solder paste PCB yog qhia hauv daim duab hauv qab no.
2. Patch
Cov txheej txheem no yog siv lub tshuab mounting kom raug mount cov chips mus rau qhov chaw sib thooj ntawm PCB nto ntawm cov ntawv luam tawm los yog cov nplaum nplaum.
SMT tshuab tuaj yeem muab faib ua ob hom raws li lawv txoj haujlwm:
Lub tshuab ua haujlwm siab: haum rau mounting ib tug loj tus naj npawb ntawm cov khoom me me: xws li capacitors, resistors, thiab lwm yam., kuj tuaj yeem mount ib co IC Cheebtsam, tab sis qhov tseeb yog txwv.
B Universal tshuab: haum rau mounting tus opposite pw ua ke los yog siab precision Cheebtsam: xws li QFP, BGA, SOT, SOP, PLCC thiab hais txog.
Cov cuab yeej kos duab ntawm lub tshuab SMT yog qhia hauv daim duab hauv qab no.
PCB tom qab thaj yog qhia hauv daim duab hauv qab no.
3. Reflow vuam
Reflow Soldring yog cov lus txhais lus Askiv Reflow soldring, uas yog kev sib txuas ntawm cov khoom siv thiab hluav taws xob sib txuas ntawm cov khoom sib dhos saum npoo thiab PCB solder pad los ntawm melting solder paste rau ntawm Circuit Court board solder pad, tsim hluav taws xob Circuit Court.
Reflow welding yog txheej txheem tseem ceeb hauv SMT ntau lawm, thiab qhov tsim nyog qhov kub thiab txias nkhaus yog qhov tseem ceeb los lav qhov zoo ntawm reflow vuam.Qhov kub tsis zoo yuav ua rau PCB vuam tsis xws li vuam tsis tiav, vuam virtual, tivthaiv warping, thiab cov khoom siv ntau dhau, uas yuav cuam tshuam rau cov khoom zoo.
Cov khoom siv kos duab ntawm reflow vuam rauv yog qhia hauv daim duab hauv qab no.
Tom qab reflow rauv, PCB ua tiav los ntawm reflow vuam yog qhia hauv daim duab hauv qab no.