SMD SOLDERING 101 - SAWV DAWS HAUV TSEV HAUV TSEV, HOT AIR BLOWER, SMD STENCIL THIAB HAND SOLDERING: 5 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Nyob zoo!

Nws yog ib qho yooj yim zoo nkauj los ua cov soldering…. Tau thov qee qhov ntws tawm, Tshav kub rau saum npoo thiab siv cov tshuaj txhuam tab sis thaum nws los rau hauv cov khoom siv SMD nws yuav tsum muaj txuj ci me ntsis thiab qee yam cuab yeej thiab khoom siv ntxiv.

Hauv Cov Lus Qhia no, Kuv yuav qhia koj kuv 3 cov txheej txheem ntawm SMD kev siv cov cua kub rov rov los rau qhov chaw soldering, Cov phaj kub thiab cov hlau ib txwm siv. Kuv yuav siv SMD Stencil rau kev thov muab tshuaj txhuam ua ke hauv thawj ob txoj hauv kev thiab ib txwm siv 25W cov hlau txuas thiab cov hlau txuas rau tes Soldering. Koj tuaj yeem siv ib txoj hauv kev twg los xij uas koj xav tias nws yooj yim dua.

Thov txheeb xyuas cov vis dis aus kom nkag siab yooj yim!

Kauj Ruam 1: Sau cov Khoom

63/37 solder muab tshuaj txhuam

26 gauge flux cored solder hlau

25 watt soldering hlau

Cov Chaw Siv Hluav Taws Xob Rework (Rau Cov Cua Kub Kub)

Kub Phaj (Roti Maker) (Rau Cov Kub Kub Soldering)

IPA Tshuaj thiab Paj Rwb (rau kev ntxuav)

De-solder Twj

De-solder Wick

SMD Stencil (xaj online)

Tweezers

Hlau Stripper

Txiav Pliers

Yog tias koj tsis paub tias SMD stencil yog dab tsi, nws yog laser txiav cov ntawv hlau tsis xeb uas tau siv los faib cov Solder paste zoo heev rau PCB's. Kev tsim khoom loj Cov kab hauv kev lag luam siv cov tshuab ua haujlwm zoo nrog rau SMD Stencil kom xa cov kua nplaum.

Kauj Ruam 2: KUB HAUV TSEV KAWM NTAWV

Ua ntej tshaj, kuv yuav qhia koj yuav ua li cas thiaj ua tau cov phaj kub kub. Kuv yuav siv Hluav Taws Xob Hluav Taws Xob tseem hu ua Roti Maker ntawm no hauv Is Nrias teb rau qhov muag. Tau kawg qhov no tsis muaj Kev Tswj Kub, tab sis kuv yuav ua tus saib xyuas tus kheej tom qab txheej txheem. Yog li yuav tsum tsis muaj teeb meem.

Kev lag luam siv rov rov qab ncu nrog ntsuas qhov ntsuas kub kom tswj tau cov khoom tsim hluav taws xob. Re-flow ncu kom raug tswj cov cua sov thiab cua txias raws li cov khoom siv thiab cov khoom siv sib xyaw ua ke. Kuv tau kaw PCB ntawm kuv lub rooj siv daim kab xev pob tshab thiab tso SMD Stencil sab xis rau ntawm Pawg Thawj Coj. Teem Stencil nrog cov ntawv los ntawm PCB thiab nws yog lub tswv yim zoo los siv cov hlau nplaum txhawm rau ruaj ntseg stencil nyob hauv qhov chaw. Ntawm no kuv siv 63% tin - 37% Lead solder paste. Ua ntawv thov qee tus Solder muab tshuaj txhuam rau ntawm daim ntawv nplaum thiab siv qee yam tiaj tus, zoo li PCB lossis daim npav rho nyiaj kom kis tau cov laug zoo ib yam ntawm PCB. Tshem tawm Stencil ua tib zoo thiab koj tuaj yeem pom tias Cov Tshuaj Txhuam Hniav tau siv tau zoo ib yam ntawm Cov Puag Ncauj ntawm PCB. Muab tag nrho cov khoom ntim saum npoo av thiab tso lub Rooj Tsav Xwm rau ntawm Cov Phaj Kub. Tig rau ntawm lub phaj kub thiab tos kom txog thaum Cov Tshuaj Muab Tshuaj txhuam yaj thiab tshem tawm lub rooj tsav xwm tam sim ntawd tom qab cov kua nplaum yaj. Cov Tshuaj Txhuam Hniav melts nyob ib puag ncig 180 degree Celsius mus rau 220 degree Celsius thiab cov txheej txheem no coj kuv ncig peb feeb kom ua tiav cov tshuaj txhuam.

Kauj Ruam 3: HOT AIR SOLDERING

Yog tias koj tab tom cuam tshuam nrog Cov khoom tiv thaiv Kub, qhov txheej txheem yav dhau los tsis tuaj yeem siv vim tias tsis muaj kev tswj kub. Yog li kuv yuav siv Cov Cua Kub Rov Rov Los Siv Chaw Muag Khoom. Qhov no yog cov cuab yeej txhim khu kev qha thiab tsis kim heev piv rau Re-flow ncu.

Ua raws cov txheej txheem tib yam los thov siv cov tshuaj txhuam rau ntawm PCB raws li tau qhia hauv cov kauj ruam dhau los. Tom qab muab cov khoom tso rau ntawm Circuit Board, teeb tsa lub chaw haujlwm rov ua haujlwm kom sov thiab cua nrawm. Nqa Nozzle ntawm Blower ze rau ntawm Circuit board thiab tos kom txog thaum Cov Tshuaj Muab Tshuaj txhuam yaj thiab fuses nrog IC Pins. Thov Nco ntsoov tias Yog tias koj tab tom siv LED siv txoj hauv kev no, tsis txhob tshuab cua kub ncaj qha rau ntawm LED's, Xwb, tshuab cua sov tom qab PCB kom sov cov pawm thiab cov laug muab tshuaj txhuam yuav fuse ua ke nrog LED. Nws tsis tas yuav tsum tau tso cov khoom raws nraim ntawm PCB. Me ntsis Tus naj npawb ntawm qhov kev tso kawm Offset yuav raug kho tau vim yog qhov ntom ntom ntom ntom ntawm cov kua nplaum yaj.

Kauj Ruam 4: SMD SOLDERING USING SOLDERING IRON

Tes Soldering

Yog tias koj tsis xav siv lub phaj kub lossis chaw ua haujlwm rov ua dua tshiab, txoj hauv kev no siv cov hlau txuas, txuas thiab xaim xaim. Nws yog qhov yooj yim los siv rab hlau ntse tab sis nws tsis muaj teeb meem ntau. Kuv tso lub Circuit Board rau ntawm kuv lub tsev ua tus tuav PCB.

Kuv tau txuas qhov txuas rau daim vis dis aus ntawm qhov kawg ntawm cov lus qhia no. Thov qee qhov dej ntws los ntawm cov ntaub qhwv thiab ua kom sov lub ntsej muag los ntxuav cov ntaub qhwv thiab tshem tawm cov txheej txheej oxidation. Rau ob lub davhlau ya nyob twg xws li cov tiv thaiv, lub tshuab hluav taws xob thiab lub diodes, thawj zaug siv qee qhov sib txuas ntawm ib qho ncoo los ntawm Tuav Cov Hluav Taws Xob kwv yees li ntawm 45 degrees, thiab tom qab ntawd ua kom sov lub lauj kaub thiab tso cov khoom siv siv tus tweezers.

Tom qab ntawd tin rau lwm qhov kawg thiab. Ntawm no kuv siv 26 gauge flux cored soldering hlau. Ib yam li ntawd rau siv cov tshuaj SMD ICs, Ntxuav cov nplaim siv flux thiab paj rwb. Tom qab ntawv thov qee qhov dej ntws hauv Lub Pob Tawb kom tuav IC nyob rau hauv qhov chaw thiab muab cov ces kaum sib dhos ua ntej thiab tom qab ntawd muab lwm cov ntaub qhwv.

Qee zaum muaj txoj hauv kev tsim cov choj txuas ntawm IC pins. Muaj ob txoj hauv kev los kho qhov ntawd. Ib qho yog cua sov tus choj txuas thiab ib txhij siv lub tshuab de-solder los nqus cov laug ntxiv. Lwm txoj hauv kev yog siv lub lauj kaub de-solder. Muab tus pas nrig rau ntawm tus choj txuas thiab ua kom sov qhov chaw.

De-solder wick yog tsis muaj dab tsi tab sis ib txoj hlua tooj liab xaim coated nrog flux kom nce kev sib raug zoo ntawm cov tooj liab.

Kauj Ruam 5: Ua tiav

Thaum koj tau ua tiav cov txheej txheem txheej txheem nws yog ib qho tseem ceeb kom tshem tawm cov dej ntws los ntawm PCB. Txau me me ntawm IPA (iso-propyl alcohol) Tshuaj thiab ntxuav nws nrog paj rwb.

Yog tias koj muaj kev ua xyem xyav lossis tawm tswv yim, Thov tso lawv rau hauv cov lus hauv qab no.

Ua tsaug rau koj mus ntsib Kuv Cov Lus Qhia!

H S Sandesh Hegde