Taw qhia
Rau ntau lub tuam txhab nyuam qhuav pib teeb tsa ib qhoSMT ntau lawm kab, cov lus nug xws li "Reflow soldering yog dab tsi?", "Yuav ua li cas yuav tsum tau reflow soldering kub yuav tsum tau teem?", thiab "Vim li cas soldering tshwm sim txawv thaum hloov mus rau ib tug txawv PCB ntawm tib lub tshuab?" feem ntau warrant ntau mloog dua qhov yuav khoom ntawm nws tus kheej.
Yooj yim muab tso, reflow soldering yog SMT txheej txheem uas siv qhov ntsuas kub thiab nyob hauv lub sijhawm los cuam tshuam cov solder paste ntawm PCB rau preheating, ua kom sov, melting, thiab txias, thaum kawg tsim cov pob qij txha ruaj khov.
Reflow soldering qhov cub tsis yog ib qho teeb meem ntawm "kub lub PCB kom txog thaum lub solder melts." Dab tsi tiag tiag txiav txim siab qhov zoo tshaj plaws yog qhov kub thiab txias profile lub PCB nkag mus thoob plaws hauv qhov cub- feem ntau hu ua qhov ntsuas kub reflow.
Qhov cub reflow yog dab tsi? Nws ua haujlwm li cas?
Nyob rau hauv cov txheej txheem SMT, solder paste yog thawj zaug luam tawm rau hauv PCB pads los ntawm cov hlau stencil, thiab tom qab ntawdxaiv thiab qhov chawtshuabmuab cov khoom siv xws li resistors, capacitors, ICs, QFNs, thiab BGAs rau hauv lawv qhov chaw sib thooj. Nyob rau theem no, lub Cheebtsam tsuas yog ib ntus ua raws li cov tshuaj txhuam hniav thiab tseem tsis tau tsim cov pob qij txha kawg.
Thaum PCB nkag mus rau hauvreflow qhov cub, solder paste undergoes ib tug series ntawm kev hloov raws li qhov kub thiab txias maj mam nce. Cov kuab tshuaj thiab cov volatiles raug tso tawm, cov flux pib qhib, thiab PCB thiab cov khoom siv maj mam ncav cuag qhov zoo tshaj plaws kub rau soldering. Lub solder muab tshuaj txhuam ces melts, lub molten solder ntub cov ntaub qhwv thiab cov khoom ua rau, thiab thaum kawg, cov pob qij txha khov kho thaum txias.
Yog li ntawd, cov txheej txheem SMT raug muab sau ua ke raws li hauv qab no:
Solder paste luam ntawv → Muab tso rau hauv→ Reflow soldering → Solder sib koom tsim →Kev tshuaj xyuas
NeoDen IN12C yog lub tshuab tsis siv neeg reflow solderingtsim tshwj xeeb rau cov txheej txheem no. Nws nta 12 qhov chaw kub thiab txias-6 nyob rau sab saum toj thiab 6 hauv qab-thiab siv cua kub convection los ua kom sov PCB.
Dab tsi yog qhov txawv ntawm reflow soldering tshuab thiab yoj soldering tshuab?
Ob leegreflow solderingtshuabthiabyoj solderingtshuabyog siv rau PCB soldering, tab sis lawv ua hauj lwm txawv.
Reflow soldering feem ntau tso siab rau cov tshuaj pleev xim thiab cov txheej txheem tswj qhov kub thiab txias rau qhov chaw solder -mount cov khoom, ua rau nws yog ib qho ntawm cov khoom tseem ceeb hauv ib qhoSMT ntau lawm kab. Wave soldering tshuab, ntawm qhov tod tes, yuav dhau PCB los ntawm nthwv dej ntawm molten solder thiab feem ntau yog siv los ntawm - qhov sib xyaw lossis cov txheej txheem sib xyaw ua ke.
Yog tias qhov kev tsim khoom feem ntau suav nrog qhov chaw-mount cov khoom, ces reflow soldering feem ntau yog ib qho tseem ceeb ntawm cov khoom siv hauv SMT cov kab ntau lawm.
Reflow soldering ua haujlwm li cas? Cov lus piav qhia ntxaws txog 4 theem kub
Lub hauv paus ntawm reflow soldering tshuab tsis yog ib qho kev ntsuas kub ib leeg, tab sis qhov ua tiav qhov kub thiab txias uas PCB ua raws lub sijhawm. CovNeoDen IN12C siv phau ntawvfaib cov txheej txheem no rau hauv ob peb theem tseem ceeb: preheating, activation, reflow, thiab txias.
Theem 1: Preheating Zone
Thaum PCB thawj zaug nkag rau hauv qhov cub reflow, qhov kub yuav tsum tsis txhob nce siab los yog dheev. Lub hom phiaj tseem ceeb ntawm theem preheating yog maj mam sov lub PCB, cov khoom siv, thiab cov tshuaj pleev xim rau hauv kev npaj rau tom ntej soldering.
Yog tias qhov kub thiab txias tau nce sai heev, PCB thiab cov khoom siv yuav muaj kev cuam tshuam ntawm thermal shock, thiab cov evaporation ceev ntawm cov kuab tshuaj nyob rau hauv solder paste kuj tseem yuav ua rau kom muaj qhov tsis xws luag.
Yog li ntawd, nyob rau hauv lub reflow soldering preheating cheeb tsam, yuav tsum tau them nyiaj mloog tsis tau tsuas yog rau qhov kawg kub tab sis kuj rau tus nqi ntawm kub nce.
Theem 2: Ua kom muaj zog thiab tuav thaj chaw
Thaum nkag mus rau thaj chaw ua kom muaj zog, PCB qhov kub thiab txias tseem nce ntxiv lossis tseem nyob hauv qhov chaw ruaj khov. Ib qho ntawm cov haujlwm tseem ceeb ntawm theem no yog maj mam sib npaug ntawm qhov kub thiab txias thoob plaws thaj chaw sib txawv ntawm PCB thaum tso cai rau cov flux hauv cov tshuaj txhuam hniav kom ua tiav tag nrho.
For PCBs with large surface areas, thick copper layers, or high component density, heat distribution across the board is not entirely uniform. Yog tias qee qhov chaw ua kom sov sai dua li lwm tus, qhov no yuav cuam tshuam rau cov txiaj ntsig tom ntej.
CovNeoDen IN12Cscua sov module nta cov thermal them nyiaj tsim thiab txhawb nqa airflow speeds nyob rau hauv txhua cheeb tsam kub, muab yooj yim rau optimize kub profiles rau txawv PCBs.
Theem 3: Reflow Zone
Thaum lub PCB nkag mus rau hauv cheeb tsam reflow, qhov kub thiab txias txuas ntxiv mus, thiab cov solder nyob rau hauv solder paste ncav cuag nws melting point. Lub molten solder ntub cov PCB pads thiab cov khoom ua haujlwm, thaum kawg tsim cov pob qij txha.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias nyob rau hauv reflow soldering, siab dua kub tsis tas yuav zoo dua.
Yog tias qhov kub thiab txias tsis txaus lossis lub sijhawm ua kua theem luv luv, cov tshuaj nplaum yuav tsis yaj tag, ua rau cov pob qij txha tsis tiav; Yog tias qhov kub thiab txias siab dhau los yog lub sijhawm ntev dhau lawm, nws yuav ua rau muaj kev pheej hmoo ntawm oxidation ntawm PCB, cov khoom siv, thiab cov tshuaj txhuam hniav.
CovNeoDen IN12 siv phau ntawvhais tias qhov ntsuas kub siab tshaj plaws yuav tsum tau txiav txim siab raws li cov khoom siv tshuaj yaj ywm melting point thiab hais tias qhov tseeb reflow kub profile yuav tsum yog raws li qhov tsis tau muab los ntawm cov chaw tsim khoom siv tshuaj pleev ib ce, es tsis siv tus nqi ruaj khov.
Kauj Ruam 4: Txias Cheeb Tsam
Tom qab reflow tiav, cov kua solder pib txias thiab tsim cov pob qij txha kawg. Txias yog ib feem tseem ceeb ntawm cov txheej txheem reflow soldering; Nws tsis yog ib qho teeb meem ntawm "tso cai rau kev sib dhos kom txias tom qab soldering."
Lub NeoDen IN12C tau nruab nrog thaj chaw txias uas muaj kev ywj pheej ntawm huab cua ncig tsim, uas txo qhov cuam tshuam ntawm sab nraud ib puag ncig ntawm cov chav sov sab hauv thaum tso cai rau kev hloov pauv huab cua tshaj tawm hauv thaj chaw txias.
Dab tsi yog qhov reflow soldering kub profile? Vim li cas nws tseem ceeb tshaj qhov kub ntawm qhov cub?
Ntau tus pib nyiam txhais "reflow qhov cub kub" ua ib tus lej, xws li "tsuas yog teem rau 250℃." Qhov tseeb, qhov kev nkag siab no tsis raug.
Qhov ntsuas kub tso tawm ntawm qhov cub reflow tsis tas yuav sib npaug ntawm qhov ntsuas kub ntawm PCB nto. CovIN12C siv phau ntawv tshwj xeeb tshaj yog hais tias cov zaub ntawm cov khoom vaj huam sib luag qhia tau hais tias qhov tiag -lub sij hawm kub ntawm lub cua sov chav tsev, tsis yog qhov tseeb kub ntawm lub PCB nto. Qhov tseeb PCB kub kuj cuam tshuam los ntawm cov khoom xws li kev ceev ceev, PCB loj, tuab, cov khoom siv, thiab cov khoom siv ntom ntom.
Yog li ntawd, dab tsi engineers tiag tiag yuav tsum tau tsom rau yog PCB kub profile.
1. Koj ua li cas kuaj qhov tseeb reflow soldering kub profile ntawm PCB?
Feem ntau, thermocouple kub sensors yog ntsia ntawm cov chaw sawv cev ntawm PCB. Tom qab ntawd PCB tau dhau los ntawm qhov cub reflow ntawm lub tshuab conveyor, thiab tiag tiag -lub sijhawm kub ntawm qhov chaw sib txawv raug kaw.
NeoDen IN12C yog nruab nrog 4-channel PCB qhov ntsuas kub ntsuas qhov system uas tuaj yeem sau cov ntaub ntawv ntsuas kub tiag tiag ntawm cov sensors thiab tso saib PCB qhov profile kub.
Thaum pib qhov kub thiab txias profile tau txais, nws yuav tsum tau muab piv nrog qhov pom zoo profile muab los ntawm cov chaw tsim khoom siv tshuaj txhuam los txiav txim seb puas yuav kho qhov kub thiab txias ntawm qhov chaw conveyor.NeoDenIB 12Cneeg sivphau ntawvkuj qhia meej meej kom ua qhov ntsuas kub ntawm qhov profile thiab kev ua kom zoo ua ntej kev tsim khoom.
2. Vim li cas qhov reflow qhov cub conveyor ceev cuam tshuam rau cov txiaj ntsig soldering?
Lub conveyor ceev txiav txim siab ntev npaum li cas PCB tseem nyob hauv txhua qhov chaw kub.
Kev qeeb qeeb ua rau PCB lub sijhawm nyob hauv qhov cub, feem ntau ua rau muaj cua sov ntau dua; ceev ceev, conversely, shorten lub PCB lub cua sov lub sij hawm. Yog li ntawd, txawm hais tias qhov kub thiab txias tsis hloov pauv, hloov qhov ceev ntawm conveyor ib leeg tuaj yeem ua rau muaj kev hloov pauv tseem ceeb hauv qhov ntsuas kub kawg.
Dab tsi tshwj xeeb yuav tsum tau xav txog thaum xaiv lub qhov cub reflow?
Rau SMT Hoobkas khoom, xaiv areflow qhov cubyuav tsum tsis txhob txwv rau kev sib piv tus nqi thiab tus naj npawb ntawm cov cheeb tsam kub. Qhov tseem ceeb tshaj, cov cuab yeej yuav tsum muaj peev xwm ua tau raws li qhov ntsuas kub ntawm qhov profile rau PCB.
Ua ntej, xav txog qhov siab tshaj plaws PCB qhov ntev thiab cov khoom siv conveyor ntau. NeoDen IN12C muaj qhov siab tshaj plaws PCB dav ntawm 300 hli thiab qhov kub thiab txias ntawm chav tsev kub txog 300 degree.
Tom ntej no yog qhov ntsuas kub thiab ntsuas kev ntsuas nkhaus. Yog tias cov cuab yeej tsuas tuaj yeem tso saib qhov ntsuas kub hauv qhov cub tab sis tsis tuaj yeem yooj yim txheeb xyuas qhov tseeb ntawm PCB, cov kws ua haujlwm yuav ntsib cov kev txwv thaum ua kom zoo dua cov txheej txheem.
Tsis tas li ntawd, cov xwm txheej xws li cua kub ncig, thaj chaw ywj pheej tswj qhov kub thiab txias, qhov system txias, kev ruaj ntseg conveyor, cov txheej txheem tu, thiab ntawm -qhov chaw fais fab mov yuav tsum raug txiav txim siab.
Dab tsi yog cov yam ntxwv ntawm NeoDen IN12C reflow soldering tshuab?
Ua raws li cov txheej txheem hais saum toj no rau cov cuab yeej siv tiag tiag, cov yam ntxwv tseem ceeb ntawm NeoDen IN12C tuaj yeem ua tiav raws li: ntau- cheeb tsam kub tswj, kub- huab cua convection, ntsuas qhov ntsuas kub tiag tiag, thiab kev hloov kho qhov kub ntawm qhov profile.
Lub tshuab nta tag nrho ntawm 12 thaj chaw cua sov-6 nyob rau sab saum toj thiab 6 nyob rau hauv qab-siv nichrome hlau thiab aluminium alloy cua sov ntsiab lus. Lub conveyor ceev yog li ntawm 50 mus rau 600 mm / min, nrog lub siab tshaj plaws PCB dav ntawm 300 mm.
Lub kaw lus tswj hwm txhawb kev ntsuas kub ntawm plaub qhov chaw PCB, qhia txog qhov ntsuas kub ntawm lub sijhawm, thiab tuaj yeem khaws cia txog 40 cov ntaub ntawv ua haujlwm. Rau SMT cov chaw tsim khoom uas yuav tsum tau hloov pauv ntawm cov khoom sib txawv PCB, qhov no txhais tau hais tias cov txheej txheem ua tau zoo tuaj yeem raug cawm thiab rov qab los.
IN12C kuj txhawb kev hloov pauv huab cua hauv txhua qhov chaw kub thiab qhov chaw txias, tso cai rau kev hloov kho raws li cov kev xav tau ntawm cov PCB sib txawv. Nws txoj kev tswj hwm siv PID tswj algorithm, nrog rau qhov ntsuas kub thiab ntsuas qhov tseeb ntawm ± 0.5%.
Rau cov tuam txhab hluav taws xob, qhov tseem ceeb ntawm cov yam ntxwv no tsis nyob hauv qhov tsis muaj ntau, tab sis hauv kev pab engineers yooj yim dua tsim, sim, thiab rov ua dua cov txheej txheem reflow ruaj khov.
FAQ
Q1. Lub luag haujlwm tseem ceeb ntawm reflow soldering yog dab tsi?
Lub luag haujlwm tseem ceeb ntawm reflow soldering yog kom yaj cov nplaum nplaum, ntub cov ntaub qhwv thiab cov khoom ua haujlwm, thiab thaum kawg tsim cov pob qij txha txhim khu kev qha los ntawm kev tswj kub thiab sijhawm.
Q2. Dab tsi kub yog feem ntau xav tau rau reflow soldering?
Tsis muaj qhov ntsuas kub ruaj khov uas siv rau txhua yam khoom. Qhov tseeb tsis yuav tsum tau txiav txim raws li qhov kub thiab txias profile muab los ntawm cov chaw tsim tshuaj paus muab tshuaj txhuam, solder paste alloy, PCB yam ntxwv, thiab cov khoom yuav tsum tau ua.
Q3. Puas yog qhov kub siab dua ib txwm zoo dua rau reflow soldering?
Tsis yog. Qhov kub thiab txias dhau lawm yuav ua rau tsis txaus solder paste melting, thaum kub dhau los yog lub sij hawm raug ntau dhau tuaj yeem ua rau muaj teeb meem xws li oxidation ntawm PCB, cov khoom, thiab cov tshuaj txhuam hniav. Thaum kawg, qhov tseeb PCB qhov profile yuav tsum yog lub hauv paus rau kev txiav txim.
Q4. Vim li cas thiaj li yuav tsum tau kuaj cov reflow soldering kub profile?
Vim tias qhov kub thiab txias tso tawm los ntawm cov khoom siv tsis sib npaug ntawm qhov ntsuas kub ntawm PCB. Tsuas yog los ntawm kev ntsuas qhov ntsuas qhov kub thiab txias ntawm PCB- siv txoj hauv kev xws li thermocouples- tuaj yeem txiav txim siab seb cov txheej txheem puas ua tau raws li cov kev cai ntawm cov tshuaj nplaum.
Q5. Yuav ua li cas feem ntau yuav tsum tau reflow qhov cub kub calibrated?
Kev tu kom zoo sib txawv nyob ntawm cov khoom siv thiab ib puag ncig tsim khoom. Cov neeg siv phau ntawv NeoDen IN12C tsis qhia txog lub voj voog calibration zoo ib yam; yog li ntawd, nws tsis pom zoo kom tsuas yog siv lub sijhawm ruaj khov raws li tus qauv rau tag nrho cov kab ntau lawm. Ib txoj hauv kev tsim nyog tshaj yog ua kev tshuaj xyuas raws li cov khoom siv tu vaj tse, ntau zaus, thiab cov txiaj ntsig ntawm qhov ntsuas kub ntawm qhov profile.
Xaus
Rau SMT cov chaw tsim khoom thiab cov tuam txhab tsim khoom siv hluav taws xob, cov kev txiav txim siab tseem ceeb yog: seb cov khoom puas tuaj yeem tswj tau qhov kub thiab txias, seb nws puas tuaj yeem kuaj qhov tseeb PCB qhov kub thiab txias profile, seb nws puas tuaj yeem kho cov txheej txheem rau PCBs sib txawv, thiab seb nws puas tuaj yeem tsim cov khoom tsim tawm yav dhau los.
NeoDen IN12C nta 12- cheeb tsam kub-cua convection tsim thiab yog nruab nrog 4-channel PCB qhov chaw ntsuas kub, ntsuas qhov kub thiab txias, cov ntaub ntawv ua haujlwm, thiab kho qhov nrawm thiab cua ntws. Nws muab ntau yam kev hloov pauv kev xaiv rau SMT reflow soldering txheej txheem kev txhim kho thiab ntau lawm.
Yog koj yogteeb tsa SMT ntau lawm kablos yog nrhiav xaiv qhov zoo reflow qhov cub rau koj cov khoom siv PCBA uas twb muaj lawm,Peb caw koj los tshawb txog cov ncauj lus kom ntxaws specifications thiab configurations ntawm NeoDen IN12C. Rau cov PCB tshwj xeeb, solder paste, thiab cov peev txheej tsim khoom,koj tseem tuaj yeem hu rau pab pawg NeoDen ncaj qha rau cov lus pom zoo xaiv cov khoom siv.