Nyob rau hauv cov txheej txheem PCBA, ntxiv rau batch soldering sivreflowqhov cubthiabyoj solderingtshuab, phau ntawv soldering tseem yuav tsum tau tsim cov khoom hauv nws tag nrho.
Cov teeb meem xav tau kev saib xyuas thaum ua haujlwm phau ntawv PCBA soldering:
1. Yuav tsum ua haujlwm nrog lub nplhaib electrostatic, tib neeg lub cev muaj peev xwm tsim tau ntau tshaj 10,000 volts ntawm hluav taws xob zoo li qub, thiab IC yuav raug puas tsuaj thaum qhov hluav taws xob ntau tshaj 300 volts, yog li tib neeg lub cev yuav tsum tau tawm hluav taws xob zoo li qub hauv av.
2. Hnav hnab looj tes lossis ntiv tes npog los ua haujlwm, txhais tes liab qab tsis tuaj yeem kov lub rooj tsavxwm ncaj qha thiab cov ntiv tes kub.
3. Weld ntawm qhov raug qhov kub thiab txias, vuam lub kaum sab xis, thiab vuam sib txuas, thiab khaws lub sijhawm vuam kom zoo.
4. Tuav lub PCB kom raug: tuav lub ntug ntawm PCB thaum khaws PCB thiab tsis txhob kov cov khoom ntawm lub rooj tsavxwm nrog koj txhais tes.
5. Sim siv cov vuam kub qis: qhov kub-kub vuam yuav ua kom cov oxidation ntawm cov hlau taub hau, txo lub neej ntawm cov hlau taub.Yog hais tias qhov kub ntawm qhov kub ntawm qhov kub siab tshaj 470 ℃.Nws oxidation tus nqi yog ob zaug ceev li 380 ℃.
6. Tsis txhob siv lub zog ntau dhau thaum soldering: thaum soldering, thov tsis txhob siv lub zog ntau dhau, txwv tsis pub nws yuav ua rau lub taub hau ntawm lub taub hau puas, deformation.Ntev npaum li qhov ntxeev ntawm cov hlau soldering tuaj yeem tiv taus qhov sib koom ua ke, cov cua sov tuaj yeem hloov mus.(Raws li qhov loj ntawm qhov sib koom ua ke los xaiv ib lub taub hlau sib txawv, kom cov hlau taub kuj tuaj yeem ua kom zoo dua cov cua sov).
7. soldering yuav tsum tsis txhob khob los yog co lub taub hau hlau: khob los yog co lub taub hau hlau yuav ua rau cov cua sov core puas thiab tin hlaws splash, ua rau lub neej ntawm cov cua sov cores, tin hlaws yog splashed ntawm lub PCBA yuav tsim ib tug luv luv Circuit Court. , ua rau tsis zoo hluav taws xob ua haujlwm.
8. siv daim txhuam cev ntub dej kom tshem tawm cov hlau taub hau oxide thiab cov tin slag ntau dhau.Kev tu cov ntaub so ntswg dej kom tsim nyog, cov ntsiab lus dej ntau dua tsis tsuas yog tsis tuaj yeem tshem tawm tag nrho lub taub hau ntawm cov shavings, tab sis kuj vim tias qhov kub thiab txias ntawm lub taub hau soldering (qhov no thermal shock rau lub taub hau hlau thiab Cov cua kub hauv cov hlau, kev puas tsuaj yog qhov zoo heev) thiab tsim cov dej xau, cov khoom siv tsis raug thiab lwm yam tsis zoo, soldering hlau taub hau dej lo rau lub rooj tsavxwm Circuit Court kuj tseem yuav ua rau corrosion ntawm Circuit Court board thiab luv luv Circuit Court thiab lwm yam tsis zoo, yog tias cov dej tsis zoo. me ntsis los yog tsis ntub dej kev kho mob, nws yuav ua rau lub taub hau soldering hlau puas, oxidation thiab ua rau tsis nyob rau hauv lub tin, tib yam yooj yim mus ua cuav soldering thiab lwm yam tsis zoo soldering.Nco ntsoov xyuas cov ntsiab lus dej hauv daim txhuam cev kom tsim nyog, thaum tsawg kawg 3 zaug hauv ib hnub los ntxuav daim txhuam cev hauv cov pob zeb thiab lwm cov khib nyiab.
9. Tus nqi ntawm cov tin thiab flux yuav tsum tsim nyog thaum soldering.Ntau dhau lawm, yooj yim ua rau cov tin los yog npog qhov tsis xws luag, solder me me, tsis tsuas yog cov neeg kho tshuab tsis tshua muaj zog, thiab vim cov txheej oxidation nto maj mam tob zuj zus mus, yooj yim ua rau tsis ua hauj lwm ntawm kev sib koom tes.Cov flux ntau dhau yuav ua rau muaj kuab paug thiab corrode PCBA, uas tuaj yeem ua rau cov dej xau thiab lwm yam khoom siv hluav taws xob, me me tsis ua haujlwm.
10. feem ntau khaws lub taub hau hlau rau ntawm lub tin: qhov no tuaj yeem txo txoj hauv kev ntawm oxidation ntawm lub taub hau hlau, kom lub taub hau hlau ntau ruaj.
11. solder spatter, qhov tshwm sim ntawm cov khoom siv solder thiab soldering ua haujlwm yog cov kws txawj thiab cov hlau taub hau kub;soldering flux spatter teeb meem: thaum lub soldering hlau ncaj qha melted solder hlau, flux yuav sai li sai tau cua sov thiab spatter, thaum soldering, coj lub solder hlau tsis ncaj qha mus cuag cov hlau txoj kev, yuav txo tau cov flux spatter.
12. Thaum soldering, yuav tsum ceev faj tsis txhob ua kom cov hlau soldering kub nyob ib ncig ntawm cov yas rwb thaiv tsev txheej ntawm cov hlau thiab nto ntawm cov khoom, tshwj xeeb tshaj yog thaum soldering ib tug ntau compact qauv, cov duab ntawm cov khoom complex.
13. Thaum soldering, nws yog ib qho tsim nyog los ntsuas tus kheej.
ib.Seb puas muaj cov xau ntawm vuam.
b.Seb lub solder sib koom yog du thiab tag nrho, glossy.
c.Seb puas muaj residual solder nyob ib ncig ntawm lub solder sib koom.
d.Seb puas muaj tin.
e.Seb lub ncoo tawm.
f.Seb lub solder joint puas muaj tawg.
g.Seb cov pob qij txha tau rub lub ntsis ntawm qhov tshwm sim.
14. Kev vuam, tab sis kuj yuav tsum tau ua tib zoo saib qee qhov kev nyab xeeb, hnav lub npog ntsej muag, thiab nrog lub kiv cua thiab lwm yam khoom siv cua kom tswj tau qhov cua ntawm qhov chaw vuam.
Hauv PCBA phau ntawv vuam, xyuam xim rau qee qhov kev ceev faj, tuaj yeem txhim kho cov cuab yeej vuam thiab cov khoom siv vuam zoo.
Post lub sij hawm: Mar-03-2022