Cov kua nplaum liab yog cov polyene sib xyaw. Tsis zoo li cov tshuaj txhuam hniav, nws tau kho thaum ua kom sov. Nws qhov ntsuas kub txias yog 150 ℃, lub sijhawm no, cov kua nplaum liab pib dhau los ua cov khoom ncaj qha los ntawm muab tshuaj txhuam. Cov kua nplaum liab yog cov khoom siv SMT. Kab lus no yuav qhia koj kom nkag siab dab tsi yog kua nplaum liab rau PCB pawg thawj coj saib, dab tsi yog lub luag haujlwm ntawm kua nplaum liab ntawm PCB, lub luag haujlwm ntawm kua nplaum liab hauv PCB SMT ua thiab SMT cov kua nplaum liab txheej txheem txheej txheem.

Dab tsi yog kua nplaum liab ntawm PCB pawg thawj coj saib?

Hauv SMT thiab DIP cov txheej txheem sib xyaw, txhawm rau zam kom tsis txhob rov ua ib sab rov ua dua ib zaug, yoj yoj ib zaug ib zaug ob zaug dhau qhov xwm txheej rauv taws, hauv PCB yoj soldering nto ntu ntu ntu, nruab nrab ntawm cov cuab yeej siv cov kua nplaum liab, tuaj yeem siv tau ib zaug tin, txuag cov txheej txheem muab tshuaj txhuam luam tawm.

SMT “kua nplaum liab” txheej txheem? Qhov tseeb, lub npe raug yuav tsum yog SMT txheej txheem “faib”. Feem ntau ntawm cov nplaum yog xim liab, yog li nws feem ntau hu ua “liab nplaum”. Qhov tseeb, tseem muaj cov nplaum daj, uas zoo ib yam li peb feem ntau hu ua “daim npog ntsej muag” nyob rau saum npoo ntawm daim phiaj hluav taws xob “xim ntsuab”.

Dab tsi yog kua nplaum liab ntawm PCB pawg thawj coj saib? Dab tsi yog txoj haujlwm ntawm kua nplaum liab ntawm PCB?

Peb tuaj yeem pom tias muaj cov kua nplaum liab nyob nruab nrab ntawm qhov me me ntawm cov tiv thaiv thiab cov khoom siv. Qhov no yog kua nplaum liab. Cov txheej txheem kua nplaum liab tau tsim los vim tias muaj ntau yam khoom siv hluav taws xob uas tsis tuaj yeem hloov pauv tam sim ntawd los ntawm thawj pob DIP mus rau pob SMD.

Lub rooj tsav xwm hauv Circuit Court muaj ib nrab ntawm DIP ntu thiab ib nrab ntawm SMD qhov chaw. Koj yuav tso cov khoom li cas thiaj li tuaj yeem txuas rau lub rooj tsavxwm? Kev coj ua dav dav yog tsim txhua qhov DIP thiab SMD qhov ntawm tib sab ntawm pawg thawj coj. Qhov SMD tau luam tawm nrog cov tshuaj txhuam thiab tom qab ntawd rov qab mus rau lub cub tawg. Qhov seem ntawm DIP qhov chaw tuaj yeem txuas tau tag nrho ib zaug siv cov txheej txheem ua kom sov ua kom sov vim tias txhua tus pins raug nthuav tawm ntawm lwm sab ntawm pawg thawj coj. Yog li peb xav tau ob qib vuam thaum pib kom tau txhua yam welded.

Txhawm rau txuag chaw teeb tsa PCB, peb vam tias yuav muab cov khoom sib txuas ntxiv rau hauv. Yog li ntawd, cov cuab yeej SMT kuj tseem yuav tsum tau muab tso rau hauv qab. Txhawm rau muab cov khoom txuas rau lub rooj tsav xwm hauv Circuit Court thiab kom tau txais lub rooj tsav xwm hauv Circuit Court los ntawm Wave Soldering rauv, txhawm rau txuas lawv mus rau lub lauj kaub phom thiab tsis poob rau hauv qhov kub Wave soldering rauv.

Txhawm rau txo cov txheej txheem thev naus laus zis, peb vam tias yuav ua kom tiav cov vuam ib zaug. Los ntawm qhov-qhov rov ua kom rov zoo tuaj yeem ua tau, tab sis ntau ntawm peb cov plugins tsis tuaj yeem tiv taus qhov kub thiab txias ntawm kev rov ua dua tshiab. Yog li ntawd, dhau los ntawm qhov rov ua dua vuam tsis tuaj yeem ua tau. Yog li ntawd, nws tsuas yog ua tau los txiav txim siab hla lub qhov vuam rov qab rau cov khoom lag luam ntawm qee lub tuam txhab loj, vim tias lawv tuaj yeem yuav qee cov khoom lag luam uas muaj tus nqi siab uas tuaj yeem tiv taus kub.

Thiab qhov dav SMD vim tias tau tsim los kom tiv taus qhov kub ntawm reflow soldering, reflow soldering kub yog siab dua nthwv dej soldering kub, yog li SMD cov khoom sab laug hauv yoj soldering tin rauv, txawm tias lub sijhawm luv luv kuj tseem yuav tsis muaj teeb meem , tab sis tsis muaj txoj hauv kev los ua cov tshuab luam ntawv muab tshuaj txhuam muaj SMD yoj lub tshuab ua kom sov, vim tias qhov cub qhov cub kub yuav tsum siab dua qhov kub yaj ntawm qhov chaw muab tshuaj txhuam, Qhov no yuav ua rau SMD ib feem yaj thiab poob rau hauv lub qhov cub tawg.

Yog li ntawd, peb yuav tsum kho SMD ntaus ntawv ua ntej, yog li peb siv cov kua nplaum liab.

Lub luag haujlwm ntawm kua nplaum liab ntawm PCB yog dab tsi?

1. Cov kua nplaum liab feem ntau ua lub luag haujlwm thiab pab. Vuam yog qhov vuam tiag.

2. Wave soldering los tiv thaiv cov khoom ntawm ntog tawm (txheej txheem txheej txheem txheej txheem). Thaum nthwv dej siv cov khoom siv, cov khoom sib txuas tau tsau rau ntawm lub rooj tsav xwm luam tawm kom tiv thaiv cov khoom tiv thaiv los ntawm kev ntog tawm thaum lub rooj tsav xwm dhau los ntawm cov kab laug sab laug.

3. Reflow welding los tiv thaiv lwm sab ntawm cov khoom poob tawm (txheej txheem txheej txheem rov ua dua ob zaug). Hauv ob txheej txheej rov ua dua txheej txheem vuam txheej txheem, txhawm rau tiv thaiv cov cuab yeej loj ntawm sab welded los ntawm kev ntog tawm vim cov cua sov yaj ntawm cov laug, nws yuav tsum muaj SMT nplaum.

4. Tiv thaiv cov khoom los ntawm kev txav chaw thiab sawv ntsug (rov ua cov txheej txheem rov ua dua, txheej txheej txheej ua ntej). Siv nyob rau hauv cov txheej txheem rov ua dua thiab txheej txheej txheej txheej txhawm rau tiv thaiv kev txav chaw thiab phaj ntsug thaum txhim kho.

5, cim (yoj yoj yoj, rov ua dua vuam, ua kom tiav). Ib qho ntxiv, cov ntawv luam tawm thiab cov khoom sib hloov hloov pauv, nrog daim nplaum rau cim.

Lub luag haujlwm ntawm kua nplaum liab hauv PCB thaj ua haujlwm yog dab tsi?

Ib tus neeg ua haujlwm thaj ua rau thaj tseem ua cov kua nplaum liab, feem ntau yog xim liab (daj lossis dawb) muab tshuaj txhuam sib npaug ua kom tawv tawv, xim, hnyav thiab lwm yam nplaum, feem ntau yog siv los ua cov txheej txheem ua tiav tsau rau ntawm pawg thawj coj saib, feem ntau xa tawm lossis hlau screen luam ntawv txoj kev faib tawm . Txuas cov khoom sib xyaw thiab muab tso rau hauv qhov cub lossis rov ua cua sov kom sov thiab tawv.

Thaj ua thaj thaj ua rau thaj yog cua sov tom qab ua kom sov, thaj ua cov txheej txheem ua kom sov yog feem ntau 150 degrees, rov ua kom sov yuav tsis yaj, uas yog hais, thaj ua cov txheej txheem cua sov ua kom tawv tsis tuaj yeem thim rov qab. Cov txheej txheem ua haujlwm ntawm thaj yuav txawv vim yog cov cua sov ua kom sov, kev sib txuas, cov cuab yeej siv, thiab thaj chaw ua haujlwm. Cov ntawv nplaum yuav tsum raug xaiv raws li cov ntawv luam tawm Circuit Board board () txheej txheem.

Thaj ua cov kua nplaum liab yog tshuaj lom neeg, feem ntau yog tsim los ntawm cov khoom siv polymer. Thaj ua cov muab tub lim, tua tus neeg sawv cev, lwm yam ntxiv, thiab lwm yam. Patch ua cov nplaum liab muaj viscosity fluidity, cov yam ntxwv kub, cov yam ntxwv ntub thiab lwm yam. Raws li cov yam ntxwv ntawm cov kua nplaum liab hauv SMT ua, lub hom phiaj ntawm kev siv cov kua nplaum liab hauv kev tsim khoom yog txhawm rau ua ntu ntu khov kho ntawm PCB saum npoo thiab tiv thaiv nws los ntawm kev ntog tawm.

Thaj ua cov kua nplaum liab yog cov khoom siv ntshiab, tsis yog cov khoom tsim nyog ntawm cov txheej txheem, tam sim no nrog kev txhim kho txuas ntxiv ntawm cov qauv tsim thiab thev naus laus zis, thaj ua tiav los ntawm qhov rov ua dua vuam, rov ua dua ob zaug rov ua dua tau pom, siv lub thaj ua cov txheej nplaum nplaum txheej txheem txheej txheem tsawg dua thiab tsawg dua.

SMT txheej txheem kua nplaum liab txheej txheem

SMT kua nplaum liab txheej txheem txheej txheem txheej txheem yog: tshuaj ntsuam luam ntawv → (faib tawm) → teeb tsa → (kho) → rov ua vuam → tu → kuaj → kho → tiav.

1. Kev tshuaj ntsuam luam ntawv: nws txoj haujlwm yog luam tawm cov kab laug sab (muab tshuaj txhuam) lossis kua nplaum liab (thaj ua kua nplaum) ntawm cov laug cam ntawm PCB Circuit Board los npaj rau vuam cov khoom. Cov cuab yeej siv yog tshuab luam ntawv (tshuaj ntsuam tshuab luam ntawv), nyob ntawm qhov xub thawj ntawm SMT cov kab ntau lawm.

2. Kev faib tawm: nws yog cov kua nplaum liab taw tes rau qhov chaw ruaj khov ntawm PCB, nws lub luag haujlwm tseem ceeb yog txhawm rau txhim kho cov khoom siv rau PCB pawg thawj coj. Lub tshuab xa tawm nyob ntawm qhov kawg ntawm SMT cov kab tsim khoom lossis tom qab cov cuab yeej ntsuas.

3. Mounting: nws txoj haujlwm yog txhawm rau txhim kho cov khoom sib dhos saum npoo ntawm qhov chaw ruaj ntawm PCB. Cov cuab yeej siv yog lub tshuab SMT, nyob tom qab lub tshuab luam ntawv screen hauv SMT cov kab ntau lawm.

4. Curing: nws lub luag haujlwm yog ua kom yaj cov kua nplaum liab (nplaum nplaum), kom cov khoom sib dhos saum npoo av thiab PCB pawg thawj coj tau ruaj khov ua ke. Cov cuab yeej siv yog lub tshuab ua kom sov, nyob tom qab lub tshuab SMT hauv kab SMT.

5. Reflow vuam: nws lub luag haujlwm yog txhawm rau yaj cov kab laug sab (muab tshuaj txhuam), yog li cov khoom sib dhos saum npoo thiab PCB pawg thawj coj tau ruaj khov ua ke. Lub tshuab cua sov rov qab yog nyob tom qab lub tshuab SMT hauv kab SMT.

6. Kev tu: nws txoj haujlwm yog tshem tawm cov vuam seem xws li cov dej ntws uas ua rau tib neeg lub cev tsis zoo ntawm PCB pawg thawj coj. Cov cuab yeej siv yog lub tshuab ntxhua khaub ncaws, txoj haujlwm tsis tuaj yeem kho tau, tuaj yeem ua online, kuj tsis tuaj yeem nyob online.

7. Tshawb nrhiav: nws txoj haujlwm yog txhawm rau txheeb xyuas qhov ua tau zoo thiab kev sib dhos zoo ntawm PCB pawg thawj coj. Cov cuab yeej siv yog tsom iav tsom iav, tsom iav, ntsuas ntsuas kab hauv online (ICT), ntsuas rab koob ya, ntsuas qhov muag tsis siv neeg (AOI), X-ray kuaj kab ke, ntsuas ntsuas lub cev, thiab lwm yam. Txoj haujlwm raws li qhov xav tau kev tshuaj xyuas, tuaj yeem teeb tsa hauv kab ntau lawm ntawm qhov chaw tsim nyog.

8. Kho: nws lub luag haujlwm yog txhawm rau txheeb xyuas qhov ua tsis tiav ntawm PCB pawg thawj coj saib xyuas kom rov ua haujlwm. Cov cuab yeej tseem ceeb siv yog rab phom cua sov, hlau txuas, kho chaw ua haujlwm, thiab lwm yam. Nws tuaj yeem teeb tsa nyob txhua qhov chaw hauv kab tsim khoom.