PCB Assembly ua haujlwm li cas?
Feb 22, 2022
Kev sib dhos lossis kev tsim khoom ntawm cov ntawv luam tawm Circuit Board (PCB) muaj ntau cov kauj ruam. Kev sib koom ua ke ntawm ib kauj ruam nrog rau yav dhau los yog qhov tseem ceeb heev kom ua tiav lub rooj sib txoos zoo PCB (PCBA). Ntxiv rau qhov no, cov tswv yim yuav tsum tau txais kev tawm tswv yim los ntawm cov zis kom nws yooj yim dua los taug qab thiab daws txhua qhov yuam kev.
Muaj ntau ntau cov kauj ruam hauv kev sib dhos PCB. Yog tias koj xav tau cov khoom zoo kawg nkaus, koj tuaj yeem xa mus rau cov kauj ruam hauv qab no:
1. Ntxiv solder paste: Qhov no yog thawj theem ntawm cov txheej txheem sib dhos. Ntxiv cov tshuaj pleev xim rau cov ntaub qhwv qhov chaw uas koj xav tau solder thiab lo rau hauv qhov chaw zoo nrog kev pab los ntawm cov tshuaj ntsuam solder.
2. Muab cov khoom pov tseg: Thaum cov tshuaj nplaum tau muab ntxiv rau hauv cov ntaub qhwv, nws yog lub sijhawm los tso cov khoom. PCB mus los ntawm lub tshuab uas tso cov khoom no rau ntawm cov ntaub qhwv. Lub nro muab los ntawm cov tshuaj txhuam hniav tuav cov khoom hauv qhov chaw.
3. Reflow Soldering: Cov kauj ruam no yog siv los kho cov khoom ntawm lub rooj tsavxwm mus tas li. Tom qab muab cov khoom sib xyaw rau ntawm lub rooj tsavxwm, PCB mus dhau los ntawm cov khoom siv reflow soldering conveyor siv. Kev tswj cov cua sov ntawm qhov cub melts lub solder muab tshuaj txhuam ntxiv rau hauv thawj kauj ruam, txuas mus tas li cov khoom sib txuas.
4. Wave soldering: hla PCB los ntawm yoj soldering. Qhov no yuav tsim kev sib txuas hluav taws xob ntawm cov khoom siv, cov ntaub qhwv PCB thiab cov khoom ua haujlwm.
5. Kev Tu: Tag nrho cov txheej txheem vuam tau ua tiav. Thaum lub sij hawm soldering txheej txheem, ib tug loj npaum li cas ntawm flux residue nyob ib ncig ntawm lub solder sib koom. Peb tab tom yuav ua kev ntxuav ko taw thiab ntxuav cov dej uas seem nrog deionized dej thiab hnyav.
6. Kev Ntsuas: PCB sib dhos ua tiav thiab kev tshuaj xyuas pib kuaj qhov chaw ntawm cov khoom. Xyuas seb qhov sib dhos puas yog lawm thiab seb puas muaj cov khoom tsis muaj lossis cov khoom siv, thiab lwm yam.