Nyob rau hauv tus txheej txheem ntawmreflow qhov cubthiabyoj soldering tshuab, PCB board yuav deformed vim muaj kev cuam tshuam ntawm ntau yam, ua rau PCBA tsis zoo vuam.Peb yuav tsuas txheeb xyuas qhov ua rau deformation ntawm PCBA pawg thawj coj saib.
1. Kub ntawm PCB board hla lub qhov cub
Txhua lub rooj tsav xwm Circuit Court yuav muaj tus nqi siab tshaj TG.Thaum qhov kub ntawm qhov cub reflow siab dhau lawm, siab tshaj qhov siab tshaj TG tus nqi ntawm lub rooj tsavxwm Circuit Court, lub rooj tsavxwm yuav soften thiab ua rau deformation.
2. PCB pawg thawj coj saib
Nrog rau qhov nrov ntawm cov tshuab tsis muaj hlau lead, qhov kub ntawm lub cub tawg yog siab dua li cov hlau lead, thiab cov kev xav tau ntawm cov phaj siab dua thiab siab dua.Qhov qis dua tus nqi TG, qhov ntau dua qhov Circuit Court board yog deform thaum lub sij hawm lub cub tawg, tab sis qhov siab dua tus nqi TG, tus nqi kim dua.
3. Lub thickness ntawm PCBA board
Nrog rau txoj kev loj hlob ntawm cov khoom siv hluav taws xob mus rau cov kev taw qhia me me thiab nyias, lub thickness ntawm lub rooj tsav xwm Circuit Court yog ua thinner.Lub thinner lub Circuit Court board yog, lub deformation ntawm lub rooj tsavxwm yog feem ntau yuav tshwm sim los ntawm high kub thaum lub sij hawm reflow vuam.
4. PCBA pawg thawj coj loj thiab tus naj npawb ntawm cov boards
Thaum lub rooj tsav xwm Circuit Court yog reflow welded, nws feem ntau muab tso rau hauv cov saw rau kev sib kis.Cov chains ntawm ob sab yog cov ntsiab lus txhawb nqa.Yog hais tias qhov loj ntawm lub rooj tsavxwm Circuit Court loj dhau los yog cov boards loj dhau lawm, nws yog ib qho yooj yim rau lub rooj tsavxwm Circuit Court sag mus rau nruab nrab point, uas ua rau deformation.
5. Qhov tob ntawm V-Cut
V-txiav yuav rhuav tshem cov txheej txheem ntawm lub rooj tsavxwm.V-txiav yuav txiav grooves ntawm thawj daim ntawv loj, thiab qhov tob heev ntawm V-txiav kab yuav ua rau deformation ntawm PCBA board.
6. Lub rooj tsav xwm PCBA yog npog nrog thaj tsam tooj liab tsis sib xws
Nyob rau hauv lub rooj tsavxwm dav dav tsim muaj thaj tsam loj ntawm cov ntawv ci tooj liab rau hauv av, qee zaum Vcc txheej tau tsim thaj tsam loj ntawm cov ntawv ci tooj liab, thaum cov cheeb tsam loj ntawm cov ntawv ci tooj liab tsis tuaj yeem sib npaug sib npaug hauv tib lub rooj sib tham, yuav ua rau muaj cua sov tsis sib xws thiab txias ceev, Circuit Court boards, ntawm chav kawm, kuj muaj peev xwm ua kom sov bilges txias shrink, Yog hais tias lub expansion thiab contraction tsis tau ib txhij los ntawm txawv kev nyuaj siab thiab deformation, nyob rau lub sij hawm no yog hais tias qhov kub ntawm lub rooj tsavxwm tau mus txog rau sab sauv txwv ntawm TG tus nqi, lub rooj tsavxwm yuav pib mos, uas ua rau deformation mus tas li.
7. Cov ntsiab lus txuas ntawm txheej txheej ntawm PCBA board
Niaj hnub no lub rooj tsavxwm Circuit Court yog ntau txheej pawg thawj coj saib, muaj ntau cov ntsiab lus sib txuas ntawm qhov sib txuas, cov ntsiab lus sib txuas no tau muab faib ua los ntawm lub qhov, qhov muag tsis pom, qhov taw tes faus, cov ntsiab lus txuas no yuav txwv qhov cuam tshuam ntawm thermal expansion thiab contraction ntawm lub rooj tsavxwm. , ua rau deformation ntawm lub rooj tsavxwm.Cov saum toj no yog cov laj thawj tseem ceeb rau deformation ntawm PCBA board.Thaum lub sijhawm ua thiab tsim khoom ntawm PCBA, cov laj thawj no tuaj yeem tiv thaiv thiab deformation ntawm PCBA board tuaj yeem txo tau zoo.
Post lub sij hawm: Oct-12-2021