Common SMT Soldering Defects thiab Solutions hauv Electronics Manufacturing

Surface Mount Technology (SMT) yog dav siv nyob rau hauv kev lag luam electronics manufacturing kev lag luam vim nws high efficiency thiab high-density sib dhos zoo. Txawm li cas los xij, qhov tsis xws luag hauv cov txheej txheem SMT yog qhov tseem ceeb uas cuam tshuam rau qhov zoo thiab kev ntseeg siab ntawm cov khoom siv hluav taws xob. Tsab ntawv xov xwm no yuav tshawb txog cov teeb meem uas tsis sib xws hauv SMT thiab lawv cov kev daws teeb meem.

Txias Soldering: Cold soldering tshwm sim thaum lub soldering kub tsis txaus los yog lub sij hawm soldering yog luv heev, ua rau lub solder tsis yaj kiag li thiab ua rau tsis zoo soldering. Txhawm rau kom tsis txhob txias txias, cov tuam ntxhab yuav tsum xyuas kom meej tias lub tshuab reflow soldering muaj kev tswj xyuas qhov kub thiab txias thiab lub sij hawm tsim nyog raws li cov kev cai tshwj xeeb ntawm cov tshuaj txhuam thiab cov khoom siv.

Solder Bridging: solder bridging yog lwm qhov teeb meem tshwm sim hauv SMT, qhov twg cov solder txuas cov ntsiab lus uas nyob ib sab. Qhov no feem ntau yog tshwm sim los ntawm ntau daim ntawv thov muab tshuaj txhuam los yog tsim tsis tsim nyog PCB ncoo. Txhawm rau hais txog kev sib txuas ntawm cov hlua khi, ua kom zoo dua qhov kev xaiv thiab qhov chaw, tswj tus nqi ntawm cov khoom siv tshuaj pleev ib ce, thiab txhim kho PCB ncoo tsim kom muaj qhov sib txawv ntawm cov ntaub qhwv.

Tsis muaj: Voids hais txog qhov muaj qhov khoob hauv cov ntsiab lus uas tsis muaj cov khoom siv. Qhov no tuaj yeem cuam tshuam rau lub zog thiab kev ntseeg siab ntawm cov soldering. Txhawm rau tiv thaiv cov voids, teeb tsa lub reflow soldering kub profile kom ntseeg tau tias cov solder melts tag nrho thiab sau cov ntaub. Tsis tas li ntawd, xyuas kom meej tias muaj flux evaporation txaus thaum lub sij hawm soldering txheej txheem kom tsis txhob muaj roj seem uas tuaj yeem ua rau voids.

Component Hloov: Thaum lub sij hawm reflow soldering txheej txheem, Cheebtsam yuav txav mus los vim melting ntawm solder, ua rau tsis raug soldering txoj hauj lwm. Txhawm rau tiv thaiv kev hloov pauv, ua kom zoo dua qhov kev xaiv thiab qhov chaw thiab xyuas kom meej tias lub tshuab tuaj tos-thiab-qhov chaw tsis raug teeb tsa, suav nrog kev tso kawm nrawm, siab, thiab hom nozzle. Xaiv cov nozzles tsim nyog raws li qhov loj thiab cov duab ntawm cov khoom kom ntseeg tau tias lawv txuas nrog PCB. Txhim kho lub PCB ncoo tsim kom paub meej txaus thaj tsam thiab qhov sib nrug tuaj yeem txo qhov kev hloov pauv zoo.

Qhov kub thiab txias ib puag ncig: Ib puag ncig kub ruaj khov yog qhov tseem ceeb rau kev ua kom zoo. Dej Chillers , los ntawm kev tswj xyuas qhov kub thiab txias ntawm cov dej txias, muab kev ruaj khov qis-kub txias rau cov tshuab rov ua dua thiab lwm yam khoom siv. Qhov no yuav pab tswj cov solder nyob rau hauv qhov tsim nyog kub ntau rau melting, tsis txhob soldering tsis xws luag tshwm sim los ntawm overheating los yog underheating.

Los ntawm kev ua kom zoo tshaj qhov kev xaiv thiab qhov chaw, teeb tsa qhov rov ua kom zoo dua qhov kub thiab txias qhov profile, txhim kho PCB tsim, thiab xaiv qhov zoo nozzles, peb tuaj yeem zam qhov tsis xws luag hauv SMT thiab txhim kho cov khoom zoo thiab kev ntseeg siab ntawm cov khoom.