Qhov tshwm sim ntawm lub ntxa feem ntau tshwm sim thaum lub sij hawm ua rau shoulding ntawm nti (xws li chip congritors), thiab cov ntim me me, cov ntau dua yuav tshwm sim. Tshwj xeeb tshaj yog nyob rau hauv kev tsim cov SMD Cheebtsam nrog pob 1005 thiab 0603, nws nyuaj rau tshem tawm cov xwm txheej ntawm lub ntxa. Nyob rau hauv lub wurge to soldering txheej txheem ntawm cov nplaim npoo, cov khoom sib xyaw smt yuav tsim tej yam tsis xws luag uas ua rau muaj kev cuam tshuam rau tilting. Nyob rau hauv lub wurge soldering txheej tshiab, cov tshuab smt uas ua rau lub cev tsis zoo vim lub ntxa tshwm sim (piv txwv li Manhattan Prenomenon).
Qhov laj thawj rau qhov no yog tias lub nro no muab tshuaj txhuam ntawm cov cam cam ntawm cov cam khwb ntawm ob qho kev sib xyaw yog refluxing thaum refluxing thiab yaj. Muaj xya qhov laj thawj tseem ceeb rau kev tsom xam tshwj xeeb:
1. Cov cua sov tsis sib xws, qhov kub thiab txias faib rau hauv RHRUX RHIAV, thiab kev faib tawm tsis ncaj rau ntawm lub rooj tsavxwm
2. Qhov teeb meem nrog cov khoom sib txawv yog tias muaj qhov sib txawv hauv cov tsos ntawm cov vuam kawg, qhov chaw weldability ntawm cov khoom siv yog qhov tseem ceeb heev
3. Cov ntaub ntawv thiab thickness ntawm substrate, lub thermal conductivity ntawm cov khoom siv substrate, thiab cov khaub ncaws tuab ntawm lub substrate yog neeg pluag
4. Cov duab thiab weldability ntawm cov solder ntaub sib txawv heev, ntxiv rau lub peev xwm thermal thiab weldability ntawm cov cam tov
5. SATCH muab tshuaj txhuam. Cov kev sib txig los yog kev ua ntawm flux hauv cov ham muab tshuaj pleev yog cov neeg pluag, thiab lub thickness ntawm cov cam khwb cia sib txawv ntau heev. Cov ham muab tshuaj txhuam yog cov tuab heev, ua rau cov ntawv luam tsis zoo thiab kev ua tsis ncaj
6. Preheating kub tsawg dhau
7. Cov kev teeb tsa tsis zoo thiab kev sib txawv ntawm kev sib txawv
Qhov tshwm sim ntawm lub ntxa yog tshwm sim los ntawm cov npoo tsis sib xws ntawm cov sib xyaw ua ke ntawm ob qho tib si ntawm cov kev xav tau lub sijhawm rub tawm ntawm cov khoom sib hloov ntawm nws hauv qab.
