BGA vuam, muab yooj yim yog ib daim ntawm muab tshuaj txhuam nrog BGA Cheebtsam ntawm Circuit Court board, los ntawmreflow qhov cubtxheej txheem kom ua tiav vuam.Thaum BGA raug kho, BGA tseem welded los ntawm tes, thiab BGA yog disassembled thiab welded los ntawm BGA kho rooj thiab lwm yam cuab yeej.
Raws li qhov ntsuas kub nkhaus,reflow soldering tshuabtuaj yeem muab faib ua plaub ntu: thaj chaw ua ntej cua sov, thaj chaw khaws cua sov, thaj chaw rov qab thiab thaj chaw txias.
1. Preheating cheeb tsam
Kuj tseem hu ua thaj chaw ramp, nws yog siv los tsa PCB qhov kub thiab txias los ntawm qhov kub thiab txias mus rau qhov xav tau kub kub.Hauv cheeb tsam no, lub rooj tsav xwm hauv Circuit Court thiab cov khoom siv muaj qhov sib txawv ntawm cov cua sov, thiab lawv qhov ntsuas kub ntawm qhov sib txawv.
2. Qhov chaw rwb thaiv tsev thermal
Qee lub sij hawm hu ua thaj chaw qhuav lossis ntub dej, thaj chaw no feem ntau suav txog 30 txog 50 feem pua ntawm cov cua sov.Lub hom phiaj tseem ceeb ntawm thaj chaw ua haujlwm yog kom ruaj khov qhov kub ntawm cov khoom ntawm PCB thiab txo qhov kub ntawm qhov sib txawv.Cia lub sij hawm txaus nyob rau hauv cheeb tsam no rau lub tshav kub muaj peev xwm tivthaiv kom ncav cuag qhov kub ntawm cov khoom me me thiab xyuas kom meej tias cov flux nyob rau hauv lub solder paste yog tag nrho evaporated.Thaum kawg ntawm thaj chaw ua haujlwm, cov oxides ntawm cov ntaub qhwv, cov khoom siv, thiab cov khoom siv pins raug tshem tawm, thiab qhov kub ntawm tag nrho lub rooj tsavxwm yog sib npaug.Nws yuav tsum tau muab sau tseg tias tag nrho cov Cheebtsam ntawm PCB yuav tsum muaj qhov kub thiab txias nyob rau hauv qhov kawg ntawm cheeb tsam no, txwv tsis pub nkag mus rau hauv lub reflux cheeb tsam yuav ua rau ntau yam phem welding tshwm sim vim qhov kub tsis sib xws ntawm txhua feem.
3. Reflux cheeb tsam
Qee lub sij hawm hu ua lub ncov lossis qhov kawg cua sov cheeb tsam, thaj chaw no yog siv los tsa PCB qhov kub thiab txias los ntawm qhov kub kub mus rau qhov kub siab tshaj plaws.Lub zog kub yog ib txwm qis dua me ntsis ntawm lub melting point ntawm cov hlau, thiab lub ncov kub yog ib txwm nyob rau ntawm lub melting point.Kev teeb tsa qhov kub thiab txias hauv cheeb tsam no siab dhau yuav ua rau txoj kab nqes ntawm qhov kub nce siab tshaj 2 ~ 5 ℃ ib pliag, lossis ua kom lub ncov kub ntawm reflux siab dua li kev pom zoo, lossis ua haujlwm ntev dhau los yuav ua rau ntau dhau, delamination lossis kub hnyiab. PCB, thiab ua rau kev ncaj ncees ntawm cov khoom.Lub ncov kub ntawm reflux yog qis dua qhov kev pom zoo, thiab kev vuam txias thiab lwm yam tsis xws luag yuav tshwm sim yog tias lub sijhawm ua haujlwm luv dhau.
4. Qhov chaw txias
Lub tin alloy hmoov ntawm cov tshuaj pleev xim rau hauv cheeb tsam no tau yaj thiab tag nrho cov ntub dej ntawm qhov chaw sib koom thiab yuav tsum tau txias kom sai li sai tau los pab txhawb kev tsim cov hlau nplaum, lub ci ntsa iab sib koom ua ke, zoo li zoo thiab tsis tshua muaj kev sib cuag lub kaum sab xis. .Kev ua kom txias qeeb ua rau ntau lub rooj tsavxwm cov impurities tawg mus rau hauv cov tin, ua rau npub, ntxhib solder me ntsis.Hauv qhov xwm txheej hnyav, nws yuav ua rau tsis zoo tin adhesion thiab tsis muaj zog solder sib koom ua ke.
NeoDen muab tag nrho SMT sib dhos kab kev daws teeb meem, suav nrog SMT reflow qhov cub, yoj lub tshuab siv lub tshuab, xaiv thiab tso tshuab, tshuab luam ntawv muab tshuaj txhuam, PCB loader, PCB unloader, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X-Ray tshuab, SMT sib dhos kab khoom, PCB ntau lawm Equipment SMT spare qhov chaw, thiab lwm yam yam SMT tshuab koj xav tau, thov hu rau peb kom paub ntxiv:
Zhejiang NeoDen Technology Co., Ltd
Email:info@neodentech.com
Lub sij hawm xa tuaj: Plaub Hlis-20-2021