Kev txawj siv Circuit Board Soldering cuab yeej
Lub Circuit Court board soldering tshuab feem ntau yog siv tin-lead solder rau soldering, hu ua tin soldering.
Lub vuam mechanism ntawm lub rooj tsavxwm Circuit Court: nyob rau hauv tus txheej txheem ntawm soldering, lub solder, lub vuam thiab tooj liab ntawv ci yog raug rau qhov kev txiav txim ntawm vuam tshav kub, lub vuam thiab cov ntawv ci tooj liab tsis yaj, lub solder melts thiab ntub cov vuam nto. Lub zog ntawm cov atoms thiab molecules ua rau qhov sib txawv ntawm cov hlau los tsim cov hlau alloy txheej ntawm cov ntawv ci tooj liab thiab cov welding, thiab txuas cov ntawv ci tooj liab thiab cov weldment ua ke kom tau txais kev ruaj khov thiab txhim khu kev qha vuam taw tes.
Yog tias koj xav paub txog kev sib tw ntawm cov laug cam, koj tsis tuaj yeem ua yam tsis muaj cov cuab yeej soldering. Cov hauv qab no qhia txog cov cuab yeej soldering rau Circuit Court boards thiab siv lawv li cas.
Circuit board vuam cov cuab yeej feem ntau muaj xws li: hluav taws xob soldering hlau, solder thiab flux thiab auxiliary cuab yeej.
1. Soldering hlau
Hluav taws xob soldering hlau yog qhov tseem ceeb tshaj plaws vuam cuab yeej nyob rau hauv Circuit Court board vuam. Cov khoom siv hluav taws xob sib txawv muaj cov qauv sib txawv. Cov cua sov sab nraud hluav taws xob soldering hlau feem ntau yog tsim los ntawm cov hlau taub hau, cov tub ntxhais hlau hlau, lub plhaub, lub tes tuav, lub ntsaws thiab lwm yam. nrog zoo thermal conductivity raws li matrix; Cov cua kub hauv hluav taws xob hluav taws xob soldering hlau Cov hlau nplaum yog tsim los ntawm tsib ntu: ib qho txuas txuas, tus kov, lub caij nplooj ntoos hlav clip, cov tub ntxhais hlau soldering, thiab lub taub hau hlau (tseem hu ua tooj liab). Muaj ntau hom hluav taws xob soldering hlau, uas tuaj yeem muab faib ua cov cua sov ncaj qha, hom induction, lub zog cia hom thiab hom kev hloov kub los ntawm txoj kev cua sov; los ntawm lub zog loj tuaj yeem muab faib ua 15W, 2OW, 35W ... 300W thiab lwm yam.
Qhov kub ntawm lub taub hau ntawm lub tshuab hluav taws xob qis hluav taws xob feem ntau yog nruab nrab ntawm 300 thiab 400 degree. Feem ntau hais lus, qhov loj dua lub zog ntawm cov hluav taws xob soldering hlau, qhov kub ntau dua, thiab qhov kub ntawm cov hlau soldering ntau dua.
Vuam integrated circuits, luam Circuit Court boards, thiab CMOS circuits feem ntau siv 20W sab hauv cua sov hluav taws xob soldering hlau. Qhov ntau dua lub zog ntawm cov hlau siv, nws yooj yim rau scald cov khoom (feem ntau, qhov sib txuas ntawm diode thiab triode yuav kub hnyiab tau yog tias nws siab tshaj 200 degree) thiab cov ntawv luam tawm Circuit Court board xov hlau yuav poob ntawm lub substrate; Lub zog ntawm cov hlau siv yog me me, thiab cov hlau tsis tuaj yeem ua kom tiav, cov flux tsis tuaj yeem hloov pauv, cov pob qij txha tsis du thiab ruaj khov, thiab nws yooj yim los tsim cov vuam cuav.
2. Solder thiab flux
Thaum soldering, tin thiab flux kuj yuav tsum tau.
Cov khoom siv Tin: Nws yog cov hlau fusible uas tuaj yeem txuas cov khoom sib txuas ua rau cov ntsiab lus sib txuas ntawm lub rooj tsav xwm luam tawm. Tin (Sn) yog ib tug mos mos, malleable silver-dawb hlau nrog ib tug melting point ntawm 232 degree. Nws muaj cov tshuaj lom neeg ruaj khov ntawm chav sov, tsis yooj yim oxidized, tsis plam nws cov xim hlau, thiab muaj zog tiv thaiv atmospheric corrosion. Lead (Pb) yog lub teeb xiav-dawb hlau nrog lub melting point ntawm 327 degree. High-purity lead muaj muaj zog atmospheric corrosion kuj thiab zoo tshuaj stability, tab sis nws yog teeb meem rau tib neeg lub cev. Ntxiv ib qho kev faib ua feem ntawm cov hlau lead thiab ib qho me me ntawm lwm cov hlau rau tin tuaj yeem ua rau nws tsis tshua muaj melting point, zoo fluidity, muaj zog adhesion rau cov khoom thiab cov xov hlau, siab mechanical zog, zoo conductivity, tsis yooj yim rau oxidize, zoo corrosion kuj, kaj. thiab zoo nkauj solder pob qij txha Solder, feem ntau hu ua solder. Solder tuaj yeem muab faib ua 15 raws li cov ntsiab lus ntawm tin, thiab muab faib ua peb qib S, A, thiab B raws li cov tshuaj muaj pes tsawg leeg ntawm cov ntsiab lus tin thiab impurities. Soldering hluav taws xob Cheebtsam, feem ntau siv ib tug rosin core hlau solder hlau. Cov hlau nplaum no muaj qhov tsis tshua muaj melting point thiab muaj rosin flux, uas yooj yim rau siv.
Soldering flux: Raws li kev ua haujlwm, nws tau muab faib ua ob hom: flux thiab solder resist.
① Flux
Kev siv cov flux thaum lub sij hawm soldering yuav pab tau peb tshem tawm cov oxides ntawm cov hlau instant noodles, uas tsis yog tsuas yog conducive rau soldering, tab sis kuj tiv thaiv lub ntsis ntawm lub soldering hlau. Nws tuaj yeem yaj thiab tshem tawm cov oxides ntawm cov hlau saum npoo, thiab nyob ib puag ncig cov hlau nto thaum vuam cua sov kom cais tawm ntawm huab cua thiab tiv thaiv cov hlau los ntawm oxidizing thaum cua sov; Nws tuaj yeem txo qhov nro ntawm lub molten solder thiab pab txhawb kev ntub dej ntawm cov solder. Flux feem ntau yuav muab faib ua inorganic flux, organic flux thiab resin flux. Tam sim no, feem ntau siv flux yog rosin lossis rosin dej (solve rosin hauv cawv); Thaum solder cov khoom loj dua los yog cov xov hlau, cov tshuaj txhuam hniav tuaj yeem siv tau, tab sis nws yog corrosive rau qee yam, thiab cov seem yuav tsum tau muab tshem tawm hauv lub sijhawm tom qab soldering.
②Solder tiv taus
Lub solder tiv thaiv tuaj yeem npog lub rooj tsavxwm saum npoo ntawm lub rooj tsavxwm luam tawm uas tsis tas yuav tsum tau soldered, yog li ntawd lub solder tsuas tuaj yeem raug soldered ntawm cov ntsiab lus uas yuav tsum tau siv, thiab tuaj yeem tiv thaiv lub vaj huam sib luag kom nws tsis tshua muaj cua sov thaum lub sijhawm soldering. thiab tsis yooj yim rau ua npuas ncauj. Nws tuaj yeem tiv thaiv kev sib tsoo, tipping, luv luv, vuam cuav thiab lwm yam.
Thaum siv flux, nws yuav tsum tau siv rau hauv qhov tsim nyog raws li qhov loj me thiab qhov chaw ntawm lub workpiece yuav tsum tau welded. Yog tias qhov nyiaj tsawg dhau, qhov vuam zoo yuav raug cuam tshuam. Yog tias tus nqi ntau dhau lawm, cov khoom seem flux yuav corrode lub Cheebtsam los yog deteriorate lub rwb thaiv tsev kev ua tau zoo ntawm lub Circuit Court board.
