Kev soj ntsuam ntawm Luam Ntawv Luam Cov Ntaub Ntawv
Peb yog ib lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv xov xwm luam ntawv, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv luam tawm, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
Yog xav paub ntxiv, thov mus saib
http://www.joyful-printing.com. HMONG xwb
http://www.joyful-printing.net
http://www.joyful-printing.org
email: info@joyful-printing.net
Nrog rau kev lag luam ceev ceev, qee lub tuam txhab ua lag luam loj loj, SMT tau ua cov ntsiab lus, los ntawm cov khoom siv tes ua haujlwm tshaj plaws rau cov khoom siv tam sim no, feem ntau lawv siv SMT cov khoom siv tshuaj yaj yeeb, tiam sis ntau lub tuam txhab muaj khoom Cov kaus poom npog tsis zoo (xws li lub computer ntsuas), qhov tshwm sim ntawm cov kua qoob loo ntawm cov kua qaub thaum ntxov thiab cov txheej txheem xuab zeb ntev. Txawm li cas los xij, kev tsim cov txheej txheem ntawm cov yas liab muaj kev cai nruj heev rau kev tswj hwm yoj thiab PCB tsim tsim. Hauv qab no kuv tsuas yog ua kom paub cov kev cai rau cov qauv tsim thiab txheej txheem ntawm cov txheej txheem ntawm cov kua nplaum liab, uas yog los ntawm qhov kuv tab tom ua haujlwm rau. Lub tuam txhab tau ua ib xyoo ntawm kev sim siab kom tau txais kev kawm zoo thiab tag nrho ntawm cov kev lag luam SMT siv!
Los ntawm kev sib tw ntawm cov khoom siv hluav taws xob pom, los ntawm lub ntim ntawm lub cuab yeej, lub ntim ntawm lub khib, qhov tsim nyog tsim ntawm qhov kev teeb tsa ntaus ntawv, kev cai ntawm kev qhib lub template, thiab tsim nyog hloov ntawm cov yoj tes yawg tsis tau, dhau tus nqi ntawm pawg vuam voog yog tshaj 92%. (Muaj rau 6-pin ICs thiab ib tug 48-tus pin QFP ntawm cov khoom). Tom qab lub tshuab yoj tes taw, tsuas yog kho me me thiaj li ua tau 100% tus nqi dhau los, tab sis kev ua haujlwm vuam ntau dua los ntawm ntau tshaj peb zaug piv nrog rau phau ntawv siv phom.
Cov hauv qab no yog qee qhov kev tsim tshwj xeeb tsim los nrog SMT cov phooj ywg thiab cov kws txawj.
Rau template thickness thiab qhib kev xav tau
(1) Template thickness: 0.2 hli
(2) Yuav tsum qhib lub qauv nta: Qhib qhov dav ntawm IC yog 1/2 ntawm qhov dav ntawm ob lub pawm, thiab ntau lub qhov me me yuav qhib.
Ntaus qhov yuav tsum tau ua
(1) Ntev ntev ntawm Chip cov khoom yuav tsum yog mus rau qhov kev taw qhia ntawm cov khoom siv ntawm cov tshuab yawm tshuab yawm suab; qhov ntev ntawm txoj kab ntawm cov khoom siv hluav taws xob sib txuas yuav tsum ua tib zoo siv rau qhov kev xaav ntawm cov khoom siv lub tshuab yawm suab.
(2) Yuav kom tsis txhob muaj tus duab ntxoov ntxoo cov nyhuv, qhov xaus ntawm cov khoom siv tib lub npoo muaj raws li nyob rau hauv parallel nrog cov kev taw qhia ntawm lub tsho loj; Cheebtsam ntawm ntau thiab tsawg yuav tsum tau stagered; Cov cheebtsam me me yuav tsum tau npaj ua ntej ntawm lub Cheebtsam loj; Lub cev shields lub tswv yim cawm siav thiab lub koob. Thaum nws tsis tuaj yeem ua raws li cov lus teev tseg saum toj no, yuav tsum muaj 3 ~ 5mm sib nrug ntawm lub cheebtsam.
(3) Lub cwj pwm ntawm cov yam ntxwv yuav tsum zoo ib yam. Piv txwv li, lub cev ntawm lub tshuab hluav taws xob ntawm lub tshuab hluav taws xob, lub thauv tawm ntawm lub diode, thiab qhov kawg nkaus ntawm qhov transistor yuav tsum yog mus rau txoj kev xa mus, thawj ceg ntawm qhov kev sib cog ua ke, thiab cov zoo li.
Pob tshab aperture thiab pad design
(1) Lub qhov rau ntawm qhov yuav tsum tau muab tso rau ntawm kab sib chaws, 1/2 qauv kab sib chaws, thiab 1/4 qauv kab sib chaws. Qhov sib txawv ntawm lub qhov ntawm lub qhov taub thiab qhov taub ntawm tus pin yog tias lub kav yuav tsum zoo wetted.
(2) Elliptical daim qauv qauv yuav tsum raug siv rau qhov kev sib tiv thaiv kev tiv thaiv kom txo cov kev sib txuas ntawm tin.
Tej yam uas yuav tsum tau ua rau cov khoom loj thiab cov ntawv cog lus rau cov txheej txheem yawm suab
(1) Yuav tsum tau xaiv ib qho txheej txheem ntawm peb sab saum toj. Kev tivthaiv lub cev thiab lub tsho khij nyiab tuaj yeem tiv thaiv kev kub ntxhov ntawm ntau tshaj ob qhov 260 degrees Celsius yoj. Tom qab lub plhaub, lub cev ntaus tsis raug lossis puas lawm, thiab qhov kawg ntawm cov khoom ntim tsis muaj teeb meem tshwm sim.
(2) Lub substrate yuav tsum tiv taus cov cua sov ntawm 260 ° C / 50 s. Cov kaus poom tooj liab muaj lub dag zog zoo, thiab lub cev tiv thaiv kab mob tseem muaj txaus rau ntawm qhov kub siab txias, thiab cov kab laug sab tiv thaiv tsis wrinkled tom qab lub plhaub.
(3) Lub xwm txheej ntawm lub rooj tsav xwm Circuit Board yog tsawg dua 0.8-1.0%
Yeej tsis tsim cov khoom tsim
(1) Flux system: Yuav tsum tau txiav txim siab tias huab cua ntim ntau los yog lub qhov ntswg hnyav yuav tsum txiav txim siab raws li qhov mob uas tiv thaiv tau qhov teeb meem hauv qab ntawm PCB: qhov nyiaj phom nqi yuav tsum tau hnav thiab nyias txheej hauv qab ntawm daim txiag sau, thiab hom txheej txheem nplaum Muaj ob hom kev txhuam thiab ntsuas.
A Cov txheej txheem thiab cov foaming yuav tsum tswj qhov kev nqus ntawm lub cev. Qhov kev nqus ntawm qhov muaj zog yog feem ntau tswj ntawm 0.8 thiab 0.83.
B Thaum siv ntau hom kev txhaj tshuaj, lub plhaub nplaum nyob hauv lub khob, tsis tuaj yeem ua rau, tsis nqus dej noo, thiab tsis muaj kab mob, yog li cov kab mob fluxes nyob tsis tau. Cov lus tseem ceeb ntawm lub nozzle tuaj yeem tswj tus nqi ntawm cov tshuaj tsuag, lub raj no yuav tsum tau muab ntxuav tas li, thiab qhov tsis txhaj tshuaj tiv thaiv tsis tuaj yeem thaiv.
(2) Preheating Heat: teem caij raws li qhov tseeb ntawm lub tshuab yoj tes yoj tes laug tshuab thaj tsam (90-130 degrees Celsius). Lub luag haujlwm ntawm preheating: volatilizes qhov hnyav nyob rau hauv lub flux, uas txo cov tiam ntawm cov roj thaum lub sij hawm soldering; cov rosin thiab nquag xa khoom hauv lub fwj dej pib ua kom muaj teebmeem thiab qhib, tshem tawm cov ntawv ntim ntawm cov ntawv luam tawm, cov khoom txuas thiab cov khoom ua rau cov nplaim hluavtaws thiab lwm yam kabmob, tib lub sijhawm tiv thaiv cov hlau tawm los tiv thaiv re-oxidation; cov ntawv sau thiab cov cheebtsam feem ntau muaj peevxwm ua kom tsis txhob muaj cua sov thaum lub caij hnyav thiab thermal kev nyuab siab rau cov luam ntawv thiab cov khoom.
Kev ntsuas kub thiab lub sij hawm: Lub vuam txheej txheem yog ib txoj hau kev ntawm cov hlau thaiv cov hlau, hlau thiab cov cua, thiab lwm yam. Yog tias qhov kub kub tsis tshua muaj zog, lub khob ntawm lub kua txig yog ntau dhau ntub thiab kis rau ntawm qhov chaw hlau, thiab nws yooj yim los ua rau tsis xws li hom taub ntiv taw, bridging, thiab ntxhib ntawm lub kav. Yog hais tias qhov kub kub hnyav dhau lawm, lub tshuab puas yooj yim. Nws yuav ua rau muaj teeb meem xws li oxidation sai ntawm cov nyom lub pob yas qij txha, cov pob yas qij txha, thiab cov pob yas txha tsis sib txuas. Cov tsho kub hnyiab tau txiav txim siab raws li qhov loj thiab cov tuab ntawm cov ntawv luam tawm, tus naj npawb thiab qhov loj ntawm cov khoom nyob rau ntawm pawg thawj coj. Cov pa ntsuas sov yog feem ntau 250 degree Celsius ntxiv lossis rho 5 degrees Celsius. Txij li thaum lub tshav kub yog ib qho ua haujlwm ntawm qhov kub thiab txias, ntawm qhov kub. Lub tshav kub ntawm cov laug lim pob txha thiab cov khoom loj tuaj nrog lub sijhawm. Lub sijhawm laug ntawm cov yoj yoj tes yawm suab yog tswj los ntawm kev kho qhov ceev ntawm kev siv txoj hlua. Cov kev siv ntawm txoj siv thauj khoom yog kho raws li qhov ntev thiab ncov siab ntawm ntau hom kev yoj tes yawg, rau txhua lub nkoj. Lub sij hawm ntawm qhov chaw tiv tau kab lus qhia tau hais tias welding lub sij hawm, thiab lub sij hawm thib ob yoj sij hawm feem ntau yog 2.5-4 s. Pawg nce toj siab thiab ncov siab: Lub rooj nce toj siab feem ntau yog 3-7 degrees, thiab nws pom zoo kom ua tau 5.5-6 degrees. Nws zoo heev rau tshem tawm cov roj generated los ntawm cov tshuaj flux nyob ib ncig ntawm cov kab yas qej thiab cov khoom. Piv txwv, yog tias muaj tsawg dua nyob rau ntawm qhov tsim thaum SMD, qhov nce toj siab (inclination angle) yuav tsum loj dua, qhov tsim nyog lub nce toj tuaj yeem tsis txhob muaj qhov qoob loo, thiab qhov muag qaug zog; lub qhov siab ncov siab feem ntau tswj tau rau hauv daim ntawv pov thawj ntawm daim ntawv pov thawj. 2/3 thiab 3/4.
(3) Kev hloov kev ywj pheej ntawm cov txheej txheem tsis yoojyim: Qhov no yog ib qho tseem ceeb rau kev txhim kho qhov yoojyim zoo li yoj. Kev ntsuas kub thiab lub sij hawm yog lub hauv paus rau kev sib xyaw ua kom zoo. Lub ntsuas kub thiab lub sij hawm muaj feem xyuam rau lub ntsuas kub, qhov siab qaij, thiab qhov hloov ceev. Thaum kho cov txheej txheem tsis raws cai, ua ntej kom vuam kub thiab sijhawm. Thawj lub ncov ntawm cov hmoov txhuas ua ke muaj feem pua ntawm 220-230 degrees Celsius / 1s, feem ntau qhov siab tshaj plaws ntawm 230-240 degrees Celsius / 3s, thiab tag nrho lub sij hawm ntawm ob lub peaks yog tswj ntawm 4-7. Cov txheej txheem tooj liab yuav tsis pub tshaj 1%. Tom qab cov txheej txheem ua rau tooj liab ntxiv, qhov nro ntawm tin kuj tuaj yeem ua rau, thiab lub siab tshaj tawm tseem ceeb heev. Yog li ntawd, nws yog pom zoo rau polish tus tooj liab ib zaug ib lub hlis rau yoj soldering. Lub txij nkawm yog teem caij rau lub tin rau ntawm 200 degrees thiab tos 4-8. Tom qab teev, lub tooj liab-muaj impurities (Cn6Sn5) nyob rau saum npoo ntawm lub tin rauv tau sau.
Xaiv thiab siv cov xim liab
(1) Vim tias nws tsis yog txheej txheem, tab sis tus txheej txheem luam tawm liab liab, muaj qee qhov yuav tsum tau ua rau thixotropic index thiab viscosity ntawm cov roj hmab rubber. Yog hais tias tus thixotropic index thiab viscosity tsis zoo, qhov tom qab luam ntawv tsis zoo, uas yog, phenomenon tshwm sim, yog li Ib txhia ntawm IC lub cev yuav tsis lo rau cov kua liab thiab npaj. (Siv cov thixotropic index: 4-5; reference viscosity: (8-10) x1000000)
(2) Cov ntaub nplaum uas lo rau lub rooj zaum yuav raug muab tshem tawm nrog acetone los yog propylene glycol ether los yog nrog ib tus neeg tu cev tshwj xeeb rau kua nplaum liab.
(3) Muab cov khoom uas tsis tau tso rau hauv qhov chaw qhuav ntawm 2-10 ° C rau lub sij hawm cia rau 6 lub hlis (raws hnub ntawm cov khoom xa tuaj sab nrauv ntawm pob). Ua ntej siv, muab cov khoom rov tuaj rau chav sov thiab rov qab sov dua rau 24 xuab moos.
(4) Lub sij hawm tua kabmob yog raug 90-120 vib nas this, thiab qhov ntsuas kub zoo dua li 150 degrees.
(5) Nws muaj cov cua kub tsis zoo thiab cov khoom hluav taws xob zoo, zoo li tsis tshua muaj neeg hygroscopicity thiab siab ruaj khov.
Printing tshuab parameter hloov kev ceev faj
(1) Lub siab nyob ib ncig ntawm 4.5 kg
(2) Cov kua qaub liab yuav tsum tau siv los ua cov kua nplaum liab ntawm daim qauv.
(3) Qhov SNAP tawm qhov nruab nrab yog teem rau 0.05 hli thiab qhov kev ntsuas pib rau 2 qib.
(4) Kev siv lub tshuab tsis siv neeg lub tsheb tuaj yeem teem caij rau 2.
(5) Tom qab ua tiav lawm, cov kua liab qab ntawm daim qauv no yuav muab pov tseg thaum tsis siv hauv 5 hnub.
(6) Cov kua liab yuav tsum luam tawm meej ntawm ob qho pawm thiab tsis tuaj yeem ua haujlwm.