Dab tsi yog qhov preheating kub ntawm qhov kub thiab txias soldering hlau?
Lub preheating yuav tsum tau nce los ntawm qhov kub thiab txias (80 degrees) mus rau qhov kub siab (hauv qab 130 degrees). Feem ntau, nws yuav siv sijhawm 5-10 feeb kom sov li tom qab pib, thiab lub sijhawm sov so feem ntau yog 120 vib nas this. Cov cua kub ntawm lub rooj tsavxwm tshuab yuav tsum qis dua 180 degrees, thiab qhov zoo tshaj plaws kub ntawm cov hlau lead-free ncov tin da dej yog 250-265 degrees. Kev coj ua ntawm Guangdong Longren Computer PCB Copy Company tau ua pov thawj tias kev xa khoom ceev ntawm nthwv dej yog feem ntau yog 1500-300mm / min. Yog tias nws ceev heev, nws yooj yim ua rau muaj teeb meem xws li cov PCB tsis zoo, kev sib cuag tsis zoo, kev sib txuas virtual, luv Circuit Court, tsawg dua tin, thiab virtual soldering.
Tam sim no, lub tshuab yoj yoj siv tau txais cov thermal tawg ua ntej. Feem ntau siv yoj soldering preheating txoj kev muaj xws li yuam cua kub convection, hluav taws xob cua sov phaj convection, hluav taws xob cua sov pas nrig cua sov, infrared cua sov, thiab lwm yam. txheej txheem. Tom qab preheating, lub Circuit Court board yog welded nrog ib yoj (λ yoj) los yog ob yoj (spoiler yoj thiab λ yoj). Rau cov ntsiab lus perforated, ib nthwv dej yog txaus. Raws li lub rooj tsavxwm nkag mus rau lub crest, lub solder ntws nyob rau hauv lub opposite kev taw qhia ntawm lub rooj tsavxwm, tsim eddy tam sim no nyob ib ncig ntawm lub tivthaiv coj. Qhov no zoo li ntxuav nrog dej, tshem tawm tag nrho cov residual flux thiab oxide zaj duab xis rau nws, thiab infiltrating thaum lub solder sib koom mus txog qhov kub ntawm infiltration. Wave soldering preheating kub tswj: Nyob rau hauv yoj soldering preheating cheeb tsam, cov kuab tshuaj nyob rau hauv lub flux sprayed ntawm lub Circuit Court board volatilizes, uas yuav txo tau cov roj generated thaum lub sij hawm soldering. Nyob rau tib lub sijhawm, rosin thiab activator pib decompose thiab qhib, tshem tawm cov oxide txheej thiab lwm yam kuab paug rau ntawm qhov chaw vuam, thiab tiv thaiv cov hlau saum npoo los ntawm oxidized dua ntawm qhov kub thiab txias.
Cov ntawv luam tawm Circuit Board thiab cov khoom siv tau ua tiav tag nrho, uas tuaj yeem zam kev puas tsuaj thermal los ntawm kev kub ceev thaum lub sij hawm soldering. Lub preheating kub thiab lub sij hawm ntawm lub rooj tsavxwm Circuit Court yuav tsum tau txiav txim raws li qhov loj thiab thickness ntawm lub Circuit Court board, qhov loj thiab tus naj npawb ntawm cov Cheebtsam, thiab tus naj npawb ntawm cov khoom yuav tsum tau mounted. Lub preheat kub ntsuas ntawm qhov chaw ntawm PCB yuav tsum nyob nruab nrab ntawm 90 degree thiab 130 degree. Thaum muaj ntau yam khoom nyob rau hauv cov txheej txheem ntau txheej los yog cov khoom siv thaj ua rau thaj, qhov ntsuas kub ntawm qhov ntsuas kub yuav tsum yog qhov siab tshaj. Lub sij hawm sov so yog tswj los ntawm kev ceev ntawm txoj siv conveyor.
Yog hais tias lub preheating kub tsawg dhau los yog lub sij hawm preheating yog luv luv, cov kuab tshuaj nyob rau hauv lub flux yuav tsis volatilize txaus, thiab roj yuav generated thaum lub sij hawm vuam, ua rau vuam tsis xws luag xws li pores thiab tin hlaws dai. Yog hais tias lub preheating kub yog siab dhau los yog lub sij hawm preheating ntev dhau lawm, lub flux yuav decompose ua ntej, lub flux yuav plam nws cov dej num, thiab nws kuj yuav ua rau vuam tsis xws luag xws li burrs thiab bridging. Txhawm rau kom tswj tau qhov kub thiab txias thiab lub sijhawm kom ua tiav qhov kub ua ntej kom zoo, peb tuaj yeem txiav txim siab seb cov flux coated rau hauv qab ntawm PCB ua ntej yoj soldering yog nplaum.
