Feem ntau electronics engineers yuav tsum tau soldered lub rooj tsavxwm nrogsoldering hlau, thiab yog lub solder tin muaj tshuaj lom?
1.Yog solder tin nrog soldering hlau lom?
Qee cov neeg siv internet ua kev tsis txaus siab txog qhov tseeb tias nws tau siv cov tin tag nrho xyoo puag ncig ntawm PCB Hoobkas.Nws xav tias nws pib tsis xis nyob, thiab nws lub plab me ntsis o.Puas yog lead lom?
Qhov tseeb, nws kuj yog nyob ntawm seb cov hlau nplaum uas siv rau kev siv hluav taws xob siv hluav taws xob yog cov hlau lead-dawb lossis tsis ua haujlwm, thiab cov ntshav txhuas yuav tsum tau kuaj xyuas tsis tu ncua.Yog tias nws tsis dhau tus qauv, yuav tsis muaj teeb meem dab tsi.Puas yog solder tin muaj tshuaj lom?
Feem ntau hais lus, yog tias kev tiv thaiv thiab cov khoom siv raw khoom tau ua raws li lub teb chaws tus qauv, cov tin soldering yuav tsis ua rau muaj kev puas tsuaj loj.Tam sim no siv cov khoom tsis muaj hlau lead.
Lead yog ib yam tshuaj lom.Kev nqus ntau dhau los ntawm tib neeg lub cev yuav ua rau muaj cov tshuaj lom lead.Kev noj tshuaj tsawg tsawg tuaj yeem cuam tshuam rau tib neeg kev txawj ntse, lub paj hlwb thiab lub cev xeeb tub.Lub alloy ntawm tin thiab txhuas yog cov feem ntau siv solder.Nws muaj zoo hlau conductivity thiab tsawg melting point.Yog li ntawd, nws tau siv nyob rau hauv vuam tshuab tau ntev.Nws toxicity feem ntau yog los ntawm txhuas.Cov pa luam yeeb ua los ntawm cov hlau nplaum tuaj yeem yooj yim ua rau muaj tshuaj lom.
Cov hlau lead tuaj yeem tsim cov khoom siv lead ua, uas yog tag nrho cov khoom siv phom sij.Nyob rau hauv tib neeg lub cev, txhuas yuav cuam tshuam rau lub hauv nruab nrab lub paj hlwb thiab lub raum.Ib puag ncig toxicity ntawm cov hlau lead rau qee cov kab mob feem ntau tau lees paub.Cov ntshav lead concentration mus txog 10 μ G / dL lossis ntau dua yuav tsim cov teebmeem biochemical rhiab heev.Yog tias raug rau lub sijhawm ntev, cov ntshav txhuas cov ntsiab lus yuav siab tshaj 60 ~ 70 μ G / dl yuav ua rau cov tshuaj lead lom lom.
Cov hmoov txhuas yuav tsum muaj tshuaj lom.Cia ib leeg soldering tin muaj me ntsis cuam tshuam rau lub cev.Txawm tias cov hlau zoo tib yam yuav raug tshuaj lom yog tias lawv ntau dhau.Thaum soldering tin, yuav muaj cov pa luam yeeb, uas muaj cov khoom tsim kev puas tsuaj rau lub cev.Thaum ua haujlwm, nws yog qhov zoo tshaj rau hnav lub npog ntsej muag, tab sis nws tseem yuav muaj qee qhov cuam tshuam.Tau kawg, yog tias koj tuaj yeem siv cov hlau tsis muaj hlau lead, nws yuav muaj kev nyab xeeb ntau dua li cov hlau lead.
2, Puas yog cov hmoov txhuas tsis muaj tshuaj lom?
Cov khoom siv rau soldering tin nrog hluav taws xob soldering hlau yog solder hlau.Txawm hais tias nws cov khoom tseem ceeb yog tin, nws kuj muaj lwm yam hlau.Nws yog feem ntau muab faib ua txhuas thiab tsis muaj txhuas (xws li ib puag ncig tiv thaiv hom).Nrog rau kev qhia txog EU ROHS tus qauv, ntau thiab ntau PCB vuam factories xaiv cov hlau lead-dawb thiab ib puag ncig-phooj ywg.Lead solder hlau tseem maj mam hloov, uas tsis yog ib puag ncig tus phooj ywg thiab tsis tuaj yeem xa tawm.Lead free solder paste, lead-free tin wire thiab lead-free tin bar yog cov khoom tseem ceeb hauv khw tam sim no.
Yuav kom muab tso rau nws yooj yim: feem ntau siv soldering tin yog tshuaj lom vim nws tsis tshua muaj melting point, muaj 60% txhuas thiab 40% tin.Feem ntau ntawm cov soldering tin nyob rau hauv kev ua lag luam yog hollow thiab muaj rosin, yog li cov roj uas koj hais yog kwv yees yuav volatilized thaum lub rosin nyob rau hauv lub soldering tin melts thaum vuam.Cov roj volatilized los ntawm rosin kuj yog tshuaj lom me ntsis.Cov roj no tsw tsw phem.
Qhov teeb meem tseem ceeb ntawm cov hlau nplaum yog cov pa taws ua rau cov hlau lead.Txawm tias cov hlau lead-dawb soldering tin muaj qee qhov nyiaj txhuas.Qhov txwv ntawm cov pa luam yeeb txhuas hauv gbz2-2002 yog qhov tsawg heev thiab muaj tshuaj lom, yog li nws yuav tsum tau tiv thaiv.Vim muaj kev puas tsuaj ntawm cov txheej txheem vuam rau tib neeg lub cev thiab ib puag ncig, hauv Tebchaws Europe, kev tiv thaiv cov neeg ua haujlwm vuam thiab kev tiv thaiv ib puag ncig tau raug tswj hwm raws li txoj cai.Vuam tsis muaj kev tiv thaiv yog tsis tso cai.Hauv ISO14000 tus qauv, muaj cov kev qhia meej meej txog kev kho mob thiab kev tiv thaiv cov pa phem hauv kev sib txuas ntau lawm.
Tin muaj cov hmoov lead.Yav dhau los, muaj cov hlau lead hauv cov hlau.Solder raug cais raws li kev ua haujlwm txaus ntshai (hauv lub teb chaws catalog ntawm cov kab mob ua haujlwm);Tam sim no peb cov tuam txhab lag luam siv cov hlau lead-dawb solder hlau.Cov khoom tseem ceeb yog tin, thiab qhov chaw rau Kev Tiv Thaiv Kab Mob thiab tiv thaiv kev ntsuas tin dioxide;Nws tsis yog nyob rau hauv lub teb chaws ua haujlwm kab mob catalogue.
Feem ntau hais lus, cov pa luam yeeb txhuas hauv cov txheej txheem tsis muaj txhuas yuav tsis tshaj tus qauv, tab sis muaj lwm yam kev phom sij hauv cov hlau nplaum.Piv txwv li, soldering flux (rosin tshuaj) muaj qee yam kev phom sij, uas yuav tsum tau pom raws li qhov xwm txheej tshwj xeeb.Cov neeg ua haujlwm feem ntau tuaj yeem saib daim ntawv txheeb xyuas thiab qeb ntawm cov tin faib, kom lawv tuaj yeem sau tau zoo thiab xav kom lub tuam txhab ua kom rov ua dua tshiab (lawv tuaj yeem muab kev xav rau lub koom haum ua lag luam sab hauv ntawm lub Hoobkas).Yog hais tias lub tin muaj cov hmoov lead, nws yuav tsum muaj kev phom sij rau koj kev noj qab haus huv.Nyob rau tib lub sijhawm, lawv khaws cia hauv lub cev thiab ua rau muaj kev puas tsuaj loj rau lub cev tsis muaj zog ntawm cov hlab ntsha.
Lead dawb solder hlau yog ib puag ncig tus phooj ywg, tab sis cov hlau lead-dawb solder hlau kuj ua rau tib neeg lub cev.Cov ntsiab lus tsis tshua muaj hlau lead-dawb solder hlau tsis muaj hlau lead.Piv nrog cov hlau lead uas muaj cov hlau lead, cov hlau tsis muaj hlau lead tsis muaj kuab paug tsawg dua rau ib puag ncig thiab tib neeg lub cev dua li cov hlau lead-muaj cov hlau.Cov roj generated thaum lub sij hawmsolderingyog tshuaj lom, nrog rau cov roj rosin, zinc chloride thiab lwm yam roj vapors.
3, Yuav ua li cas tiv thaiv hluav taws xob soldering hlau thiab solder hlau los ntawm kev lom
Ua ntej tshaj plaws, PCB cov chaw tsim khoom yuav tsum siv RoHS tin hlau thaum soldering Cheebtsam nrog cov hluav taws xob soldering hlau, thiab ua txoj haujlwm zoo ntawm kev tiv thaiv: piv txwv li, hnav hnab looj tes, qhov ncauj qhov ntswg lossis roj qhov ncauj qhov ntswg, xyuam xim rau qhov cua hauv qhov chaw ua haujlwm, muaj cov pa zoo. system, xyuam xim rau kev tu tom qab ua haujlwm, thiab haus cov mis nyuj kuj tseem tuaj yeem tiv thaiv tau cov hmoov lead toxicity hauv soldering tin.
1. so rau ib lub sijhawm: feem ntau, koj yuav tsum tau so li 15 feeb rau ib teev kom txo tau qhov qaug zog, vim tias qhov kev tawm tsam yog qhov phem tshaj thaum koj nkees.
2. Haus luam yeeb tsawg dua thiab haus dej ntau dua, uas tuaj yeem tshem tawm feem ntau ntawm cov khoom tsis zoo uas nqus tau thaum nruab hnub.
3. Haus cov kua txiv hmab txiv ntoo los yog dej zib ntab ua ntej yuav mus pw, uas tuaj yeem txo qhov hluav taws kub thiab pab koj lub siab, thiab cov taum thiab zib ntab tuaj yeem tshem tawm cov hmoov txhuas thiab hluav taws xob ntau.
4. Zam kom tsis txhob muaj hluav taws xob thiab sim ua kom tsis txhob tos lub xov tooj ntawm tes.
5. Koj tuaj yeem ci ntsa iab hlau thiab sim siv PPD vuam taub hau.Nyob rau hauv txoj kev no, thaum qhov kub thiab txias, koj tuaj yeem siv cov roj vuam thiab rosin tsawg dua kom txo tau qhov mob rau koj lub cev,
6. Thaum cov roj hmab thiab cov pa luam yeeb, sim txhuam lub ntuj nrog koj lub taub hau mus rau sab, thiab sim tuav koj cov pa thaum koj txhuam dej.
7. Siv dej Tianna tsawg, siv cawv ntau, thiab txhuam ntau dua nrog cawv rau ib ntus.Cov nyhuv yuav luag zoo ib yam.
8. Ntxuav koj ob txhais tes.
9. Ua ntej yuav mus pw.Sim mus pw thiab sawv ntxov kom pw tsaug zog txaus.Tsuav koj tsaug zog zoo, impurities tuaj yeem tawm hauv koj lub cev.
10. Ua haujlwm nrog lub qhov ncauj qhov ntswg.
Post lub sij hawm: Apr-12-2022