Txheej txheem ntawm yoj soldering
Nov 25, 2019| Shenzhen Shenchuang Hi-tech Electronics Co., Ltd. Peb cov khoom tseem ceeb muaj xws li cov chargers mus ncig, tsheb chargers, USB cables, fais fab nyiaj hauv tuam txhab nyiaj thiab lwm yam khoom siv digital.Tag nrho cov khoom muaj kev nyab xeeb thiab txhim khu kev qha, nrog cov cim styles.products dhau daim ntawv pov thawj zoo li CE, FCC, ROHS, UL, PSE, C-Tick, thiab lwm yam. , Yog tias koj txaus siab rau, koj tuaj yeem tiv tauj ceo@schitec.com ncaj qha.
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Txheej txheem ntawm yoj soldering
Tom qab lub tshuab hluav taws xob nkag mus rau hauv lub tshuab hluav taws xob yoj siv los ntawm txoj siv conveyor, nws yuav dhau los ntawm qee yam ntawm cov khoom siv flux txheej, qhov twg cov flux yog siv rau hauv Circuit Court board los ntawm yoj crest, foaming lossis txau. Txij li feem ntau cov fluxes yuav tsum ncav cuag thiab tswj kom muaj qhov kub thiab txias kom ntseeg tau tias qhov ua tiav ntawm cov pob qij txha, lub rooj tsavxwm yuav tsum dhau los ntawm thaj chaw ua ntej ua ntej nkag mus rau hauv lub nthwv dej. Preheating tom qab flux txheej tuaj yeem maj mam nce qhov kub thiab txias ntawm PCB thiab qhib cov flux. Cov txheej txheem no kuj tseem tuaj yeem txo cov thermal shock generated thaum cov pab pawg sib dhos nkag mus rau lub ncov nthwv dej. Nws kuj tseem siv tau los ua kom evaporate tag nrho cov dej noo uas yuav absorbed los yog dilute cov cab kuj hnyav ntawm cov flux. Yog tias cov khoom no tsis raug tshem tawm, lawv yuav boil thaum dhau lub nthwv dej siab tshaj plaws thiab ua rau lub tshuab hluav taws xob, los yog ua kom muaj zog nyob hauv cov khoom siv los tsim cov pob qij txha lossis cov xuab zeb. Tsis tas li ntawd, vim lub thermal muaj peev xwm loj ntawm ob sab thiab ntau txheej boards, lawv xav tau ntau dua preheating kub dua li ib lub vaj huam sib luag.
Tam sim no, lub tshuab yoj soldering yog qhov pib preheated los ntawm kev siv hluav taws xob thermal. Feem ntau siv preheating txoj kev yog yuam cua kub convection, hluav taws xob phaj convection, hluav taws xob qws cua sov thiab infrared cua sov. Ntawm cov txheej txheem no, yuam cua kub convection feem ntau suav hais tias yog txoj kev hloov hluav taws xob zoo tshaj plaws ntawm yoj soldering tshuab hauv feem ntau cov txheej txheem. Tom qab preheating, Circuit Court board yog welded los ntawm ib nthwv dej (λ yoj) los yog ob yoj (turbulence yoj thiab λ yoj). Ib nthwv dej yog txaus rau perforated Cheebtsam. Thaum lub Circuit Court board nkag mus rau lub nthwv dej crest, cov kev taw qhia ntawm solder flow yog opposite rau ntawm lub rooj tsavxwm, uas muaj peev xwm tsim eddy tam sim no nyob ib ncig ntawm lub tivthaiv tus pin. Nws zoo li ib hom txhuam, uas tshem tawm tag nrho cov residual flux thiab oxide zaj duab xis rau ntawm nws, thiab ua cov ntaub ntub dej thaum lub vuam sib txuas mus txog qhov kub thiab txias.
Rau kev sib dhos ntawm kev sib xyaw tshuab, qhov cuam tshuam yoj feem ntau yog siv ua ntej λ nthwv dej. Cov nthwv dej no yog nqaim thiab muaj lub siab ntsug siab thaum muaj kev cuam tshuam, uas tuaj yeem ua rau lub vuam zoo nkag mus rau ntawm tus pin compact thiab SMD ncoo, thiab tom qab ntawd siv λ yoj los ua kom tiav qhov sib koom ua ke. Ua ntej yuav muaj kev tsim nyog ntawm cov cuab yeej siv yav tom ntej thiab cov chaw muag khoom, txhua qhov tshwj xeeb ntawm daim hlau welded nrog yoj crests yuav tsum tau txiav txim siab, vim tias cov no tuaj yeem txiav txim siab qhov kev ua tau zoo ntawm lub tshuab xav tau.