1. SMT solder paste cuam tshuam li cas rau qhov zoo?
Flux huab hwm coj piv thiab muaj pes tsawg leeg ntawm solder paste flux Cheebtsam:
(1) Cov khoom siv ua yeeb yaj kiab: 2% ~ 5%, feem ntau yog rosin, thiab derivatives, cov khoom siv hluavtaws, feem ntau siv yog dej-dawb rosin.
(2) Activator: 0.05% ~ 0.5%, feem ntau siv activators muaj xws li dicarboxylic acids, tshwj xeeb carboxylic acids, thiab organic halide ntsev.
(3) Thixotropic tus neeg sawv cev: 0.2% ~ 2%, nce viscosity thiab ua raws li kev ncua.Muaj ntau yam khoom xws li, nyiam cov roj castor, hydrogenated castor roj, ethylene glycol mono butylene, thiab carboxymethyl cellulose.
(4) Cov kuab tshuaj: 3% ~ 7%, ntau cov khoom, nrog cov ntsiab lus kub sib txawv.
(5) Lwm yam: surfactants, coupling agents.
Kev cuam tshuam ntawm solder paste flux muaj pes tsawg leeg ntawm soldering zoo:
Tin hlaws txaws, flux txaws, pob phau ntawv array (BGA) void, bridging, thiab lwm yam tsis zoo SMT nti ua thiab vuam muaj kev sib raug zoo nrog cov muaj pes tsawg leeg ntawm solder paste.Kev xaiv cov tshuaj txhuam hniav yuav tsum raug xaiv raws li cov txheej txheem ntawm cov ntawv luam tawm Circuit Board sib dhos (PCBA).Qhov kev faib ua feem ntawm cov hmoov solder muaj kev cuam tshuam zoo rau kev txhim kho kev ua tau zoo thiab viscosity.Qhov siab dua cov hmoov hmoov cov ntsiab lus, qhov me dua qhov poob.Yog li ntawd, cov tshuaj txhuam hniav siv rau cov khoom zoo-pitch yuav tsum siv 88% ~ 92% ntau cov hmoov hmoov cov ntsiab lus ntawm cov tshuaj txhuam.
1. Tus activator txiav txim siab qhov solderability lossis wettability ntawm cov tshuaj txhuam hniav.Yuav kom ua tau zoo soldering, yuav tsum muaj ib tug tsim nyog activator nyob rau hauv lub solder paste, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm micro-pad soldering, yog hais tias qhov kev ua si yog tsis txaus, nws yuav ua rau cov txiv hmab txiv ntoo tshwm sim thiab pob-socket tsis xws luag.
2. Cov khoom ua yeeb yaj kiab ua rau muaj kev cuam tshuam rau kev ntsuas ntawm cov pob qij txha thiab cov viscosity thiab viscosity ntawm solder paste.
3. Flux feem ntau yog siv los ua kom yaj cov activators, cov yeeb yaj kiab tsim cov tshuaj, cov tshuaj thixotropic, thiab lwm yam. Cov flux hauv cov tshuaj txhuam hniav feem ntau yog tsim los ntawm cov kuab tshuaj nrog cov ntsiab lus kub sib txawv.Lub hom phiaj ntawm kev siv cov kuab tshuaj kub kub kub yog los tiv thaiv cov hlau thiab cov dej ntws los ntawm kev sib tsoo thaum lub sij hawm reflow soldering.
4. Thixotropic tus neeg sawv cev yog siv los txhim kho kev luam ntawv thiab kev ua haujlwm ntawm cov txheej txheem.
2. Dab tsi yog qhov cuam tshuam rau kev ua haujlwm ntawm SMT ntau lawm?
Lub voj voog kev tso kawm yog hais txog lub sijhawm nws siv rau cov cuab yeej tso rau lub taub hau kom pib suav thaum lub Feeder khaws cov khoom, tom qab pom cov duab ntawm cov khoom, lub cantilever txav mus rau qhov sib thooj, qhov chaw ua hauj lwm axis tso cov khoom rau hauv PCB pawg thawj coj saib. , thiab tom qab ntawd rov qab mus rau Feeder noj txoj hauj lwm.Nws yog lub voj voog kev tso kawm;lub sij hawm siv nyob rau hauv kev tso kawm voj voog kuj yog qhov yooj yim parameter tus nqi cuam tshuam qhov ceev ntawm lub tshuab tso kawm.Qhov kev tso kawm voj voog ntawm high-speed cantilever tso tshuab rau mounting kuj-capacitance Cheebtsam yog feem ntau nyob rau hauv 1.0s.Tam sim no, SMT kev tso kawm Lub voj voog ntawm lub siab tshaj plaws cantilever mounter nyob rau hauv lub nti ua kev lag luam yog hais txog 0.5s;lub voj voog ntawm mounting loj ICs, BGAs, connectors, thiab txhuas electrolytic capacitors yog hais txog 2s.
Cov yam ntxwv cuam tshuam rau lub voj voog tso kawm:
Lub synchronization tus nqi ntawm khaws cov khoom (uas yog, ntau qhov txuas txuas ntawm lub taub hau qhov chaw tso cai nce thiab poob rau tib lub sijhawm los khaws cov khoom).
PCB board loj (qhov loj dua ntawm PCB pawg thawj coj saib, qhov loj dua X / Y txav ntawm lub taub hau tso, thiab lub sijhawm ua haujlwm ntev dua).
Cov khoom pov tseg tus nqi (yog tias qhov ntsuas cov duab tsis raug teeb tsa kom raug, cov khoom pov tseg thiab qhov ua tsis raug X / Y yuav tshwm sim thaum lub sijhawm lees paub cov duab ntawm kev nqus cov khoom).
Cov cuab yeej teeb tsa qhov txav nrawm tus nqi X / Y / Z / R.
3. Yuav ua li cas khaws thiab siv cov tshuaj pleev xim rau hauv SMT thaj ua haujlwm?
1. Thaum tsis siv cov tshuaj txhuam hniav, nws yuav tsum tau muab cia rau hauv lub tub yees, thiab nws qhov kub thiab txias yuav tsum tsis pub dhau 3 ~ 7 ° C.Thov nco ntsoov tias cov tshuaj txhuam hniav tsis tuaj yeem khov hauv qab 0 ° C.
2. Yuav tsum muaj tus pas ntsuas kub tshwj xeeb hauv lub tub yees kom ntsuas qhov kub thiab txias txhua txhua 12 teev thiab ua cov ntaub ntawv.Tus pas ntsuas kub yuav tsum tau kuaj xyuas tsis tu ncua los tiv thaiv kev ua tsis tiav, thiab cov ntaub ntawv tseem ceeb yuav tsum tau ua.
3. Thaum yuav cov tshuaj txhuam hniav, nws yog ib qho tsim nyog yuav tsum tau muab tshuaj txhuam rau hnub yuav khoom kom paub qhov txawv ntawm cov khoom sib txawv.Raws li SMT nti ua kev txiav txim, nws yog ib qho tsim nyog los tswj kev siv lub voj voog ntawm cov tshuaj txhuam, thiab cov khoom muag feem ntau tswj tsis pub dhau 30 hnub.
4. Solder paste cia yuav tsum tau muab cais raws li ntau hom, batch tooj, thiab txawv manufacturers.Tom qab kev yuav cov tshuaj txhuam hniav, nws yuav tsum tau muab cia rau hauv lub tub yees, thiab lub hauv paus ntsiab lus ntawm thawj-hauv, ua ntej-tawm yuav tsum ua raws.
4. Dab tsi yog vim li cas rau qhov txias vuam hauv PCBA ua
1. Lub reflow kub yog tsawg dhau los yog lub sij hawm nyob rau hauv lub reflow soldering kub yog luv luv, ua rau tsis txaus cua sov thaum lub sij hawm reflow thiab tsis tiav melting ntawm cov hmoov hlau.
2. Nyob rau hauv lub caij txias, cov cua txias muaj zog, los yog kev txav ntawm cov khoom siv tsis sib xws cuam tshuam rau cov pob qij txha, thiab nthuav tawm cov duab tsis sib xws ntawm cov pob qij txha, tshwj xeeb tshaj yog nyob rau ntawm qhov kub thiab txias me ntsis qis dua qhov melting point, thaum lub solder yog mos heev.
3. Cov kab mob ntawm qhov chaw ntawm thiab ib puag ncig cov ntaub qhwv los yog cov hlau lead tuaj yeem cuam tshuam kev muaj peev xwm flux, ua rau tsis tiav reflow.Qee zaum unmelted solder hmoov tuaj yeem pom ntawm qhov chaw ntawm qhov sib koom ua ke.Nyob rau tib lub sijhawm, lub peev xwm flux tsis txaus kuj tseem yuav ua rau kev tshem tawm tsis tiav ntawm cov hlau oxides thiab ua kom tsis tiav cov condensation.
4. Qhov zoo ntawm solder hlau hmoov tsis zoo;feem ntau ntawm lawv yog tsim los ntawm lub encapsulation ntawm oxidized hmoov heev hais.
5. Yuav ua li cas ntxuav PCB los ua ke nyob rau hauv txoj kev nyab xeeb thiab zoo tshaj plaws
Kev ntxuav PCB cov rooj sib txoos yuav tsum siv cov khoom siv uas tsim nyog tshaj plaws thiab ntxuav cov kuab tshuaj, uas nyob ntawm lub rooj tsav xwm yuav tsum tau ua.Ntawm no, ntau txoj kev ntxuav PCB thiab lawv qhov zoo thiab qhov tsis zoo yog qhia.
1. Ultrasonic PCB ntxuav
Ultrasonic PCB nqus tsev ntxhua khaub ncaws ntxuav PCBs sai sai yam tsis muaj cov kuab tshuaj ntxuav, thiab qhov no yog qhov kev siv nyiaj txiag zoo tshaj plaws PCB tu.Tsis tas li ntawd, txoj kev ntxuav no tsis txwv PCB loj lossis ntau.Txawm li cas los xij, nws tsis tuaj yeem ntxuav PCB los ua ke vim tias ultrasonic tuaj yeem ua mob rau cov khoom siv hluav taws xob thiab kev sib dhos.Nws kuj tsis tuaj yeem ntxuav aerospace / tiv thaiv PCB vim tias cov ultrasonic tuaj yeem cuam tshuam rau lub rooj tsavxwm qhov hluav taws xob.
2. Puv Tsis Siv Neeg On-Line PCBA Tu
Lub tshuab nqus tsev tsis siv neeg online PCBA tag nrho yog tsim nyog los ntxuav cov ntim loj ntawm PCB los ua ke.Ob lub PCB thiab PCBA tuaj yeem raug ntxuav, thiab nws yuav tsis cuam tshuam rau cov laug cam.PCBAs dhau qhov sib txawv ntawm cov kuab tshuaj ua kom tiav cov txheej txheem ntawm cov tshuaj ntxuav dej, tshuaj ntxuav dej, ziab, thiab lwm yam.Txoj kev ntxuav PCBA no yuav tsum muaj cov kuab tshuaj kom haum rau cov khoom siv, PCB nto, lub npog ntsej muag, thiab lwm yam. Thiab peb kuj yuav tsum tau xyuam xim rau cov khoom tshwj xeeb yog tias lawv ntxuav tsis tau.Aerospace thiab kev kho mob-qib PCB tuaj yeem raug ntxuav hauv txoj kev no.
3. Ib nrab tsis siv neeg PCBA Tu
Tsis zoo li PCBA lub tshuab ntxhua khaub ncaws online, lub tshuab nqus tsev ib nrab tuaj yeem thauj tau manually ntawm txhua qhov chaw ntawm cov kab sib dhos, thiab nws tsuas muaj ib kab noj xwb.Txawm hais tias nws cov txheej txheem ntxuav yog tib yam li PCBA tu hauv online, tag nrho cov txheej txheem tshwm sim hauv tib lub kab noj hniav.PCBAs yuav tsum tau kho los ntawm ib qho khoom siv los yog muab tso rau hauv lub pob tawb, thiab lawv cov khoom muaj tsawg.
4. Phau ntawv PCBA Tu
Phau ntawv PCBA lub tshuab nqus tsev yog tsim nyog rau me me-batch PCBA uas yuav tsum tau MPC tu hnyav.PCBA ua tiav cov tshuaj ntxuav dej hauv cov dej kub tas li.
Peb xaiv txoj kev tu PCBA uas tsim nyog tshaj plaws nyob ntawm PCBA cov cai.