Lub hauv paus rau phau ntawv
Dejlub qho cub yog ib qho kev luam tawm ua ntej ntawm PCB cov ntaub qhwv los ntawm cov cua sov muab tshuaj txhuam tawm, yog li ua kom tiav lub rooj sib tham thiab pcb pcb ntawm cov txheej txheem soldering. Kab lus no yuav pab SMT novices nkag siab qee cov ntsiab lus rau Reflow cub. Kawm txog lub hompinology ib txwm muaj qhov cub reflow muaj cov luag haujlwm no:
- Txhim kho kev sib txuas lus
- Cov txheej txheem ua kom zoo thiab daws teeb meem
- Txhawb kev siv thev naus laus zis thiab kev paub ntxiv
- Txhim khu kev sib tw kev sib tw
I. Cov tswv yim tseem ceeb ntawm kev xav tau soldering tshuab
1. Tus ua haujlwm ua haujlwm ntawm reflow soldering tshuab
Tus txheej txheem tseem ceeb ntawm qhov cub reflow yog raws li cov cua sov thiab cov khoom meraction ntawm teeb meem. Soldering txheej txheem, cov ham muab rhuab saum toj saud lub ntsej muag, halder rau cov pins thiab pcb pcb ntawm kev tsim ntawm cov khoom siv vuam muag. Cov flux ua lub luag haujlwm hauv cov txheej txheem no kom txo cov nro hauv kev sib koom ua ke, txhawb nqa cov dej ntws mus thiab sib txuas nrog cov hlua. Tom qab, nrog kev nce qib tsawg dua, txoj kev cob qhia txias, ua tiav cov txheej txheem vuam.
2. Daim ntawv thov tseem ceeb ntawm kev xav ua kom solder soldering tshuab
- Kev Lag Luam Hluav Taws Xob:Circuit Court board installation, smt thev naus laus zis, tsim kho thiab kho ntawm PCB.
- Kev sib txuas lus:Optoelectronic ntaus vuam, high-voltage cable vuam.
- Kev Lag Luam Automotive:Rau automotive Circuital Board welding thiab qhov chaw teeb tsa, kom ntseeg tau kev ntseeg tau thiab tsis tu ncua ntawm cov hluav taws xob hauv tsheb hluav taws xob.
- Kev Lag Luam Hauv Tsev Lub Tsev:Rau lub installation thiab vuam ntawm Circuit Court laug cam, Cheebtsam thiab cov pob qij txha sib dhos hauv ntau cov khoom siv hauv tsev neeg
- Aerospace kev lag luam:Launcher vuam
Ii. Lub hom phiaj kev tshawb fawb
1. Solder
Solder tau siv los sau rau hauv weld, cladding thiab brazing hauv cov khoom siv hlau hlau ntawm cov lus dav dav. Xws li vuam hlau, vuam pas nrig, brazing thiab soldering alloy.
1.1 Dab tsi yog siv cov dab tsi?
Cov ntsiab lus sib txawv melting:Cov tes nyuaj thiab cov tawv mos.
Sib txawv muaj zog:Tin-lead hamder, nyiaj txiag cam, tooj Tadder, thiab lwm yam.
1.2 soldering kub
- Cov cua sov ua ntej thaj chaw:Qhov kub feem ntau nruab nrab ntawm 150 - 200 degree. Qhov ntsuas kub ntawm solding cheeb tsam feem ntau yog nruab nrab 150 - 200 degree. Lub hom phiaj tseem ceeb ntawm theem no yog tso cai rau Circuit Courruit thiab Cheebtsam kom ua kom sov maj mam thiab tusyees.
- Tuav Cheeb Tsam:Qhov ntsuas kub feem ntau tswj tau nyob rau ntawm 180 - 220 degree. Cov ham muab tshuaj txhuam hauv qhov chaw kub no tsis yog rhuab. Hauv thaj chaw no, flux nyob rau hauv cov cam khwb cia yog nyob rau hauv cov khoom siv sib xyaw ua ke thiab tib lub sijhawm khaws cia hauv lub xeev muaj haum, npaj txhij rau kev sib tw viscosity, npaj txhij rau kev sib dhos tom ntej.
- Reflow Zone:Qhov kub feem ntau nruab nrab ntawm 220 - 260 degree. Cov ham muab tshuaj txhuam yog tag nrho melted nyob rau hauv thaj chaw no. Nyob rau hauv thaj chaw no tus muab muab tshuaj txhuam muab me me thiab cov sib koom ua ke zoo sib xws.
- Txias Zone:Tso cai rau cov yas sib koom ua kom txias thiab ua kom sai sai ua kom muaj cov qauv siv lead ua ruaj khov thiab txhim kho lub zog ntawm cov sib koom sib ke. Tus nqi cua txias feem ntau tswj tau ntawm 2 - 5 degree / s.
2. SOLDER muab tshuaj txhuam
SOLDER Muab tshuaj txhuam yog hom hluav taws xob soldering soldering cov khoom, yog tus neeg sawv cev tsim nyog sib xyaw ua ke los ua cov tshuaj tua hluav taws sib xyaw ua ke los ua cov tshuaj tua hluav taws xob sib xyaw ua ke lossis siv rau cov hluav taws xob hauv hluav taws xob.
2.1 hom soldering muab tshuaj
- Lead-muaj cam-muab tshuaj tua:Lead-muaj cam-muab tshuaj txhuam hauv cov txheej txheem soldering muaj qhov ua tau zoo me me thiab vim yog ib puag ncig cov laj thawj, kev siv cov chav kawm tiav.
- Lead-Free Solder Paste:Hauv txoj kab nrog txoj kev tiv thaiv ib puag ncig, siv dav hauv ntau yam uas yuav tsum muaj rau ib puag ncig cov khoom lag luam hauv hluav taws xob. Lead-dawb solder muab muab faib ua cov head-wick-dawb sold muab tshuaj txhuam, nruab nrab-qhuav solder muab tshuaj txhuam thiab tsawg-kub-dawb solder muab tshuaj txhuam.
2.2 Kev ceev faj rau kev siv cov ham muab tshuaj txhuam
- Kev Cia Cai Cia:SOLDER muab tshuaj yuav tsum tau muab ntim thiab khaws cia rau hauv lub tub yees ntawm 2-10 degree. Lub sijhawm siv tau yog feem ntau 3-6 lub hlis. Siv lub hauv paus ntsiab lus ntawm thawj-thawj-tawm.
- Rov ua kom sov thiab nplawm:Cov ham muab tshuaj tua tawm ntawm lub tub yees yuav tsum tau ua kom sov dua ntawm chav tsev kub rau {teev, zam kev siv cov khoom siv cua sov sab nraud. Tom qab rewarming, siv aSmt Sonder Tov KhoomLos yog manually do cov ham muab tshuaj txhuam kom ntseeg tau tias flux yog tusyees sib xyaw nrog cov hmoov tin.
- Tus nqi ntawm rab riam siv thiab luam ntawv:Tus nqi ntawm rab riam siv yuav tsum tau ntxiv rau hauv cov khoom me me kom tsis txhob ua leering rau lub zawv zawg. SqueeGee hardness feem ntau cov shaw lub hardness 80-90 mm, lub kaum ntse ntse 60-85 degree. Stainless hlau lossis hlau mesh tuaj yeem xaiv raws li cov khoom ntawm lub ntxaij phaj. Kev ua haujlwm ib puag ncig cua kub yuav tsum tau ceev cia ntawm 25 ± 5 degree.
- Tuav tom qabSOLDER Muab Tshuaj Txhuam Tshuab Luam NtawvLuam Ntawv tiav:Cov ham muab luam tawm luam tawm thaj yuav tsum tau ua kom nruj tsis dhau ntawm 1 teev kom tsis txhob muaj huab cua ntev.
3. Cov ntawv luam tawm Circuit Court
3.1 Cov qauv theem pib ntawm Circuit Court board
- Substrate:Feem ntau siv cov iav fiber cuam tshuam epoxy cobhy lossis phenolic resin cardboard (xws li fr {}}
- Lem Conduction:Tooj liab ntawv ci yog siv los ua cov khoom ua haujlwm los ua ntau lub camcrafuit Court Board rau kev sib kis hauv cov hluav taws xob.
- Sib tsoo tiv thaiv txheej txheej:Txhawm rau kom tsis txhob muaj luv luv-taws ntawm tus tooj liab ntawv ci ua ke, ntawm cov npoo ntawm Circuit Court tau them rau cov txheej ntsuab, uas yog kev tiv thaiv thiab rwb thaiv tsev.
- Cim Cim:Siv los kos cim qhov chaw ntawm Cheebtsam thiab lwm cov ntaub ntawv los pab txhawb kev teeb tsa.
3.2 Yuav ua li cas xaiv cov PCB haum rau Refow Cub
- Yooj yim circuits yooj yim:Ib leeg txheej lossis txheej txheej ob-txheej tuaj yeem ua tau raws li cov cai.
- Cov ntawv thov siab (servers, cov khoom sib txuas lus, thiab lwm yam):
- Nws raug nquahu kom xaiv pcbs nrog cov khoom siv ntau ntau, uas tuaj yeem ua kom tau raws li cov kev xav tau ntawm cov hluav taws xob ntau thiab cov teeb liab siab.
4. Rearow Cub
Refow Cub yog cov khoom tseem ceeb hauv kev tsim hluav taws xob, melting thiab kho cov khoom siv hluav taws xob thiab cov ntawv luam tawm hluav taws xob (PCB) kom ua tiav cov hluav taws xob sib txuas zoo ntawm. Cov haujlwm tseem ceeb yog raws li hauv qab no:
- Cua Sov:Soldering yog tiav los ntawm maj mam muab cua sov muab muab tshuaj txhuam rau nws lub taw tes melting.
- Tswjhwm kub profile:Qhov cub reflow kom tswj tau qhov ntsuas kub ntawm qhov kub thiab txias los ntawm kev teeb tsa cov chaw cua sov sib txawv los tiv thaiv cov hlua thiab cov ntaub ntawv PCB.
- Cua txias:Tom qab soldering ua tiav, qhov ntsuas kub tau txo qis kom ntseeg tau tias kev ntseeg tau ntawm soldering taw tes.
5. Cua sov conduction
Kev kub cua sov yog hais txog cov txheej txheem ntawm cov cua sov hloov mus los ntawm cov khoom lossis ntawm cov khoom uas muaj ntau dua rau thaj chaw ntawm qhov kub tsawg dua. Yam cuam tshuam rau kev ua tau zoo ntawm kev hloov pauv kub tau muaj npe hauv qab no:
- Cov Khoom Siv Khoom:Suav nrog thermal conductivity, kom sov muaj peev xwm, hu rau nto kom zoo thiab interface thermal kuj.
- Cov qauv tsim:Xws li xaiv cov pulb, cov hlua khi, pcb txheej thiab cua sov dissipation los ntawm-qhov tsim.
- Khoom Siv Khoom Zoo:Suav nrog cov hom cua sov, cov cua sov tsim thiab cov khoom tsis txheeb.
- Ib puag ncig qhov tseeb:Suav nrog huab cua ib puag ncig thiab cov chaw puag ncig.
6. Cua txias
6.1 Qhov xav tau cua txias
- Tiv thaiv kev puas tsuaj los ntawm kev ntxhov siab thermal.
- Ua kom zoo ntawm microstructure ntawm cov yas sib koom ua ke thiab txhim kho cov khoom siv mechanical txhua yam.
- Txo cov nyhuv ntawm flux seem.
- Txhim kho cov khoom lag luam thiab txo kev siv hluav taws xob.
6.2 Cov hau kev siv tshuab txias
Ntuj txias, yuam huab cua txias, dej txias, ua kua nitrogen txias thiab segmented cua txias. Kev xaiv tshwj xeeb yuav tsum yog raws cov yam ntxwv cov khoom, cov txheej txheem yuav tsum tau thiab cov cuab yeej siv rau kev txiav txim siab.
6.3 Cov nyhuv ntawm cov nqi txias ntawm vuam zoo
- Welded Sib koom ua ke Micructure:Cov nqi txias cuam tshuam cuam tshuam cov qoob loo loj thiab IMC txheej tsim.
- Kev tswj hwm kev ntxhov siab thermal:Tus nqi txias kom txias yuav ua rau thermal kev ntseeg siab, ua rau cov yas sib koom ua ke tawg lossis PCB warpage.
- Flux residue:Cua txias cov nqi uas nrawm dhau los yog qeeb dhau kev pheej hmoo ntawm flux residue.
- Solder koom ua ke wettability:Tus nqi txias yuav tsum tau sib phim rau cov yam ntxwv uas muaj kev sib cav kom ntseeg tau tias yog qhov ntub dej zoo.
- Cov khoom muaj kev cia siab:Tus nqi cua txias ntawm cov yas sib koom ua ke qaug zog thiab ruaj khov ntev muaj qhov cuam tshuam tseem ceeb.
III. Qhov xav tau soldering txheej txheem ib hom teeb meem thiab cov kev daws teeb meem
1. Tin pob
Tin pob yog qhov pom ntawm cov pob me ntawm cov yas ntawm cov npoo ntawm cov sib koom sib koom. Qhov no feem ntau yog vim kev siv kub yog qhov kub thiab txias heev, siv lub sijhawm vuam ntev dhau lossis vuam thaj chaw tsim qauv tsis tsim nyog.
Kev daws:Kho cov soldering kub thiab sijhawm kom ntseeg tau tias soldering tsis tau raws li qhov yuav tsum tau ua. Txheeb xyuas cov qauv tsim ntawm qhov chaw soldering kom ntseeg tau tias cov qauv tsim nyog ntawm cov ntsiab lus soldering.
2. Txias vuam
Cov vuam txias txhais tau tias cov pob qij txha welded tsis ncav cuag qhov tsis txaus ntseeg molten, ua rau muaj kev sib txuas tsis muaj zog ntawm welded pob qij txha. Qhov no tuaj yeem tshwm sim los ntawm kev siv kub tsis txaus ntseeg, siv lub sijhawm tsim hluav taws xob tsis txaus lossis tsim tsis ncaj ncees lawm.
Kev daws:Nce cov soldering kub thiab sijhawm kom ntseeg tau tias cov pob qij tov tov yog tag nrho melted. Txheeb xyuas cov qauv ntawm cov cam solding kom ntseeg tau tias satdering point muaj kev sib cuag nrog cov khoom siv.
3. Tinning
Tinning yog qhov tsim ntawm tus choj ntawm melted solder ntawm ob lossis ntau dua cov sib ze sib txawv sib koom ua ke sib koom ua ke. Qhov no feem ntau yog vim kev sib tw kub dhau heev, vuam lub sijhawm ntev dhau los yog vuam thaj chaw tsim qauv tsis tsim nyog.
Kev daws:Txo cov soldering kub thiab sijhawm kom ntseeg tau tias tsis muaj melting ntau ntawm cov pob qij txha sib dhos. Tshawb cov qauv tsim ntawm qhov chaw vuam kom ntseeg tau tias kev teeb tsa ntawm cov ntsiab lus vuam yog qhov tsim nyog.
4. Vuam Offset
Vuam offset yog hais txog ib qho kev ua yuam kev ntawm qhov chaw vuam thiab txoj haujlwm npaj. Qhov no tuaj yeem tshwm sim los ntawm cov teeb meem nrog cov khoom siv vuam lossis cov khoom siv.
Kev daws:Kuaj cov khoom siv vuam thiab cov khoom siv ua kom ntseeg tau tias lawv qhov ruaj khov thiab raug. Kho cov vuam qhov tsis sib tw thiab cov txheej txheem los xyuas kom meej qhov tseeb ntawm txoj haujlwm vuam.
Tag
Kev kawm ua kom sov so kom sov rau kev sib txuas lus, cov txheej txheem txhim kho, thev naus laus zis ua haujlwm, thiab kev nce qib ua haujlwm. Kev kawm thiab thov cov lus no hauv txoj kev ua haujlwm yog qhov tseem ceeb ntawm ib tus neeg txoj haujlwm hauv cov khoom siv hluav taws xob. Cov pib yuav tsum kawm txuas ntxiv kawm thiab xyaum.
Tuam txhab tau
Zhejiang neoden Technology Co., tsim tsa., Tsim tau nyob rau xyoo 2010 nrog 100+ tus neeg ua haujlwm & {2}} sq.m. Lub Hoobkas ntawm cov cai ntawm unfertent txoj cai, kom ntseeg tau cov qauv tswj thiab ua tiav cov nyiaj txiag feem ntau tau txais txiaj ntsig.
Muaj tus kheej lub chaw machining, cov kws tshaj lij sib sau ua ke, tester thiab QC engineers, kom ntseeg tau tias muaj peev xwm muaj zog rau neoden tshuab tsim, zoo thiab xa khoom.
40+} Ntiaj teb cov neeg koom nrog hauv Asia, Europe, Asmeskas}}}}}} Cov neeg siv tau pab tau zoo dua thiab sai dua.
3 sib txawv r & d pab pawg nrog tag nrho 25+}}}}} tus kws tshaj lij R & D paub meej thiab muaj kev txhim kho zoo dua thiab kev tsim kho tshiab.