Cov laj thawj tseem ceeb rau cov cua sov tsis sib xws ntawm cov khoom hauv SMT cov txheej txheem tsis muaj cov hlau lead-dawb reflow soldering yog: cov khoom siv lead-dawb reflow soldering khoom thauj khoom, siv cov khoom siv los yog lub rhaub dej kub, thiab qhov sib txawv ntawm lub peev xwm los yog cov cua sov nqus ntawm cov hlau lead-dawb reflow soldering Cheebtsam.
①Qhov cuam tshuam ntawm cov khoom ntim sib txawv.Kev hloov kho ntawm qhov kub thiab txias ntawm cov hlau lead-dawb reflow soldering yuav tsum xav txog kom tau txais kev rov ua tau zoo nyob rau hauv tsis muaj-load, load thiab sib txawv load yam.Tus nqi thauj khoom yog txhais raws li: LF = L / (L + S);qhov twg L = qhov ntev ntawm qhov sib dhos substrate thiab S = qhov sib nrug ntawm cov khoom sib dhos.
②Nyob rau hauv lub qhov cub uas tsis muaj hmoov lead-dawb reflow, txoj siv conveyor kuj dhau los ua cov cua sov dissipation thaum rov thauj cov khoom rau cov hlau lead-dawb reflow soldering.Tsis tas li ntawd, cov cua kub dissipation tej yam kev mob sib txawv ntawm ntug thiab nruab nrab ntawm qhov cua sov, thiab qhov kub ntawm lub ntug feem ntau qis dua.Ntxiv rau qhov sib txawv ntawm qhov yuav tsum tau ua ntawm txhua qhov kub thiab txias hauv qhov cub, qhov kub ntawm tib qhov chaw thauj khoom kuj txawv.
③ Feem ntau, PLCC thiab QFP muaj lub peev xwm kub ntau dua li cov khoom sib cais, thiab nws nyuaj rau vuam cov cheeb tsam loj dua li cov khoom me me.
Txhawm rau kom tau txais cov txiaj ntsig rov ua dua nyob rau hauv cov txheej txheem tsis muaj cov hlau lead-dawb reflow soldering, qhov loj dua qhov load, qhov nyuaj dua.Feem ntau, qhov siab tshaj plaws ntawm cov hlau lead-dawb reflow qhov cub yog li ntawm 0.5-0.9.Qhov no nyob ntawm cov khoom siv (cov khoom siv sib txuas, qhov sib txawv ntawm cov substrates) thiab cov qauv sib txawv ntawm reflow furnaces.Yuav kom tau txais cov txiaj ntsig zoo welding thiab rov ua dua, kev ua tau zoo yog qhov tseem ceeb.
Post lub sij hawm: Nov-21-2023