SMD tivthaiv phau ntawv kub cua kub soldering chaw nres tsheb vuam kauj ruam
SMD tivthaiv phau ntawv kub cua kub soldering chaw nres tsheb vuam kauj ruam
1. Kev npaj
1. Tig lub phom cua kub, kho cov huab cua ntim thiab qhov kub thiab txias mus rau qhov chaw tsim nyog: hnov cov cua ntim thiab qhov kub thiab txias ntawm cov pa cua nrog koj txhais tes; saib seb cov huab cua ntim thiab qhov kub ntawm cov pa cua tsis ruaj khov.
2. Saib xyuas tias sab hauv ntawm cov pa cua yog xim liab. Tiv thaiv kom tsis txhob muaj cua sov hauv lub tshuab ziab khaub ncaws.
3. Saib xyuas cov cua sov faib nrog ntawv. Nrhiav qhov chaw kub.
4. Siv qhov ntsuas kub qis tshaj plaws los tshuab lub resistor, thiab nco ntsoov qhov chaw ntawm qhov kub qis tshaj plaws uas tuaj yeem ua kom zoo tshaj plaws los ntawm cov resistor.
5. Kho lub tshuab ntim cua kom lub pob steel qhia tias lub ntim cua nyob hauv nruab nrab txoj hauj lwm.
6. Kho qhov ntsuas kub kom qhov ntsuas kub nyob ib puag ncig 380 degree.
Lus Cim: Thaum tsis siv rab phom cua sov rau lub sijhawm luv luv, ua kom nws tsaug zog Tig lub phom kub thaum tsis ua haujlwm li 5 feeb.
2. Siv rab phom cua kub los desolder lub tiaj pob IC:
1): Disassemble lub tiaj pob IC cov kauj ruam:
1. Ua ntej tshem tawm cov khoom, xyuas cov kev taw qhia ntawm IC, thiab tsis txhob muab tso rov qab thaum rov nruab.
2. Saib xyuas seb puas muaj cov khoom siv hluav taws xob tiv thaiv hluav taws xob (xws li cov kua siv lead ua kua, cov khoom siv yas, BGA ICs nrog sealant, thiab lwm yam) ntawm IC thiab nyob rau pem hauv ntej thiab nram qab. Yog tias muaj, npog lawv nrog shielding npog thiab lwm yam.
3. Ntxiv cov rosin tsim nyog rau IC pins yuav tsum tau muab tshem tawm kom cov PCB pads du tom qab cov khoom raug tshem tawm, txwv tsis pub yuav muaj burrs thiab nws yuav tsis yooj yim rau kev sib dhos thaum rov vuam.
4. Preheat cov phom cua kub uas hloov kho kom sib npaug ntawm thaj tsam li 20 square centimeters deb ntawm cov khoom (cov cua nozzle yog li 1CM deb ntawm PCB lub rooj tsavxwm, txav ntawm qhov ceev ceev ntawm txoj haujlwm preheating, thiab kub ntawm PCB. board tsis tshaj 130-160 degree )
1) Tshem tawm cov dej noo ntawm PCB kom tsis txhob "bubbling" thaum rov ua haujlwm.
2) Tsis txhob muaj kev ntxhov siab thiab deformation ntawm PCB pads tshwm sim los ntawm qhov sib txawv ntawm qhov kub thiab txias ntawm sab sauv thiab sab qis ntawm lub rooj tsavxwm PCB vim yog cua kub ceev ntawm ib sab (sab sauv).
3) Txo cov thermal shock ntawm qhov chaw hauv qhov vuam vim cua sov saum lub rooj tsavxwm PCB.
4) Tsis txhob IC uas nyob ib sab los ntawm desoldering thiab nqa vim cua sov tsis sib xws
5) Circuit Board thiab cov khoom siv cua sov: Cov phom kub kub yog li 1CM deb ntawm IC, txav maj mam thiab sib npaug ntawm ntug ntawm IC, thiab maj mam clamping kab pheeb ces kaum ntawm IC nrog tweezers.
6) Yog tias qhov sib koom ua ke tau ua kom sov rau qhov melting point, tes tuav lub tweezers yuav hnov thaum thawj zaug, yuav tsum tau tos kom txog thaum tag nrho cov solder ntawm IC tus pin yog yaj, thiab ua tib zoo nqa cov khoom vertically ntawm lub rooj tsavxwm. los ntawm "zero force" Nqa nws, kom tsis txhob muaj kev puas tsuaj rau PCB lossis IC, thiab tseem tsis txhob luv luv Circuit Court ntawm lub solder sab laug ntawm PCB. Kev tswj cua sov yog qhov tseem ceeb hauv kev rov ua haujlwm dua, thiab cov solder yuav tsum tau yaj tag kom tsis txhob muaj kev puas tsuaj rau lub ncoo thaum cov khoom raug tshem tawm. Nyob rau tib lub sijhawm, nws yog ib qho tsim nyog los tiv thaiv lub rooj tsavxwm los ntawm overheated, thiab lub rooj tsavxwm yuav tsum tsis txhob cuam tshuam vim cua sov.
(Piv txwv: yog tias ua tau, koj tuaj yeem xaiv 140 degree -160 degree rau preheating thiab cua sov ntawm qhov qis. Tag nrho cov txheej txheem ntawm kev tshem tawm IC tsis pub dhau 250 vib nas this)
7) Tom qab tshem tawm cov IC, saib seb cov pob qij txha ntawm lub PCB yog luv luv. Yog tias muaj qhov luv luv, siv rab phom cua kub los ua kom sov dua. cais. Sim tsis txhob siv cov hlau soldering, vim hais tias cov hlau soldering yuav tshem tawm cov solder ntawm PCB, thiab cov solder tsawg dua ntawm PCB yuav ua rau muaj peev xwm ntawm cov khoom cuav. Nws tsis yog yooj yim los sau tin pads nrog me pins.
2) Txhim kho IC cov kauj ruam
1. Saib seb cov pins ntawm IC yuav tsum tau muab tso rau yog tiaj tus. Yog hais tias muaj ib tug solder luv luv Circuit Court nyob rau hauv lub IC pins, siv ib tug tin-absorbing hlau rau nws; Yog tias tus pin tsis raug, qhov nkhaus tuaj yeem kho nrog lub scalpel.
2. Muab cov flux tsim nyog rau ntawm cov ntaub so ntswg. Yog tias nws tau kub heev, IC yuav ntab tawm. Yog tias nws tsawg dhau, nws yuav tsis ua haujlwm. Thiab npog thiab tiv thaiv ib puag ncig cov khoom kub-resistant.
3. Muab lub tiaj tus IC tso rau ntawm lub ncoo nyob rau hauv thawj qhov kev taw qhia, thiab kho cov IC pins nrog PCB board pins. Thaum aligning, ob lub qhov muag yuav tsum saib vertically downward, thiab plaub sab ntawm tus pins yuav tsum tau aligned. Pom pom plaub sab ntawm cov pins Qhov ntev yog tib yam, cov pins ncaj nraim thiab tsis muaj skew. Qhov tshwm sim ntawm rosin thaum tshav kub tuaj yeem siv los lo IC.
4. Siv rab phom cua kub kom preheat thiab ua kom sov rau IC. Nco ntsoov tias rab phom cua kub tsis tuaj yeem tso tseg thaum lub sijhawm tag nrho cov txheej txheem (yog tias nws nres, nws yuav ua rau qhov kub thiab txias hauv cheeb tsam ntau dhau thiab puas). Saib xyuas IC thaum cua sov. Yog tias muaj kev txav mus los, maj mam kho nws nrog tweezers yam tsis muaj kev tso cua sov. Yog tias tsis muaj qhov tshwm sim hloov pauv, tsuav yog tias lub solder nyob rau hauv IC pins yog yaj, nws yuav tsum pom thawj zaug (yog tias lub solder melted, koj yuav pom tias IC muaj me ntsis sinking, rosin muaj cov pa taws. , lub solder ci ntsa iab, thiab lwm yam, koj tuaj yeem siv cov tweezers kom maj mam kov cov khoom me me ntawm ib sab ntawm IC, yog tias cov khoom me me nyob ib sab ntawm nws txav mus, nws txhais tau hais tias cov solder nyob rau hauv IC pins tseem yuav yaj. ) thiab nres cua sov tam sim ntawd. Vim tias qhov kub thiab txias los ntawm rab phom kub yog qhov siab, qhov kub ntawm IC thiab PCB board tseem nce ntxiv. Yog tias qhov ntsuas kub tsis tau pom thaum ntxov, IC lossis PCB lub rooj tsavxwm yuav raug puas tsuaj yog tias qhov kub thiab txias siab dhau lawm. Yog li lub sijhawm cua sov yuav tsum tsis txhob ntev dhau.
5. Tom qab lub rooj tsavxwm PCB txias lawm, ntxuav thiab qhuav cov pob qij txha nrog cov dej nyias nyias (lossis dej ntxuav lub rooj tsavxwm). Tshawb xyuas cov pob qij txha thiab cov luv luv.
6. Yog tias muaj qhov teeb meem tsis tseeb, koj tuaj yeem siv cov hlau soldering los ntawm ib qho los yog tshem tawm IC nrog rab phom kub thiab rov ua dua; Yog hais tias muaj ib tug luv luv Circuit Court, koj muaj peev xwm siv ib tug damp-resistant daim txhuam cev los so lub ntsis ntawm lub soldering hlau, thiab muab tso rau hauv ib co rosin raws tus pins ntawm lub luv luv Circuit Court thiab maj mam muab nws tshem tawm cov solder ntawm lub luv luv. Los yog siv tin-absorbing nyob ntawm tej: siv tweezers los xaiv plaub tin-absorbing nyob ntawm tej dipped nyob rau hauv ib tug me me ntawm rosin, muab lawv nyob rau hauv luv luv Circuit Court, thiab maj mam nias lawv nrog ib tug soldering hlau nyob rau hauv lub tin-absorbing nyob ntawm tej. luv-circuit yuav yaj thiab lo rau tin-absorbing nyob ntawm tej. Tshem tawm qhov luv luv.
Lwm qhov: Koj tuaj yeem siv hluav taws xob soldering hlau los solder IC. Tom qab kho cov IC thiab lub ncoo, dipped cov hlau soldering nyob rau hauv rosin thiab maj mam stroke raws cov npoo ntawm IC pins ib tug los ntawm ib tug. Yog hais tias IC tus pin sib nrug loj, koj tuaj yeem ntxiv Rosin, siv cov hlau nplaum los yob lub pob tin hla tag nrho cov pins rau soldering.
