Dab tsi yog PCB sib dhos txheej txheem

Txawm hais tias ntau tus engineers paub zoo txog kev tsim thiab tsim cov txheej txheem ntawm cov ntawv luam tawm Circuit Board (PCB), tseem muaj ntau tus engineers uas tsis paub meej txog cov txheej txheem sib dhos ntawm PCB boards, yog li hnub no peb yuav tham txog cov txheej txheem sib dhos ntawm PCB boards.

1. Cov khoom siv lead ua
Txhawm rau npaj cov khoom siv hluav taws xob kom zoo nkauj thiab zoo nkauj ntawm lub rooj tsav xwm luam tawm thiab zam kev ua tsis tiav xws li cov khoom siv tsis raug, nws yog ib qho tseem ceeb heev uas yuav tsum tau ua cov coj ntawm cov khoom. Feem ntau, koob-qhov ntswg pliers los yog snappers yog siv. Muaj ntau txoj hauv kev rau kev tivthaiv txhuas txoj kev, feem ntau muab faib ua cov txheej txheem yooj yim, khoov txoj kev, ntsug insertion forming method, integrated circuit forming method, thiab lwm yam.
2. Pre-welding kev kho mob ntawm cov khoom siv lead ua thiab hlau xaus
Txhawm rau kom ntseeg tau qhov zoo ntawm vuam, cov ntawv xov xwm ntawm cov hlau lead yuav tsum tau muab tshem tawm ua ntej cov khoom siv vuam, thiab cov hlau lead yuav tsum tau dipped hauv tin. Cov hlau nrog rwb thaiv tsev txheej yog txiav tawm raws li qhov xav tau ntev, thiab qhov ntev stripping yog txiav txim siab thiab stripped raws li txoj kev sib txuas ntawm cov hlau. Cov xov hlau strand yog twisted thiab tinned, thiaj li ua kom ntseeg tau tias cov hlau lead hlau txuas nrog lub voj voog thiab tuaj yeem ua hluav taws xob zoo thiab tuaj yeem tiv taus qee qhov rub tawm yam tsis muaj qhov kawg.

3. Kev txheeb xyuas qhov kev hloov chaw
Resistors, capacitors, semiconductor li thiab lwm yam axially symmetrical Cheebtsam yog feem ntau siv nyob rau hauv ob txoj kev: kab rov tav thiab ntsug. Cov txheej txheem ntxig siv yog cuam tshuam nrog kev tsim ntawm lub rooj tsav xwm hauv Circuit Court, nyob ntawm seb qhov yuav tsum tau ua. Tom qab cov khoom tau muab tso rau hauv lub rooj tsavxwm, cov hlau lead yuav tsum khaws ib qho ntev tom qab hla lub ncoo, feem ntau txog 1-2mm; saib ntawm hom plug-in, tus pin tsis khoov tom qab dhau los ntawm lub ncoo, thiab nws yog qhov yooj yim rau ntxig thiab vuam, ib nrab ntawm lub kaum os Cov khoov hom khoov cov coj mus rau 45 degrees, uas muaj qee yam kev siv zog. Hom tag nrho-khoov khoov cov coj mus txog 90 degrees, uas muaj lub zog txhua yam, tab sis xyuam xim rau cov kev taw qhia uas cov hlau lead yog khoov rau hauv lub ncoo.
4. Vuam ntawm cov khoom
Thaum vuam lub voj voog, cov ntawv luam tawm Circuit Board tau muab faib ua cov khoom siv hluav taws xob, feem ntau pib los ntawm cov teeb liab tawm tswv yim kawg, thiab vuam nyob rau hauv ib ntus, thawj vuam cov khoom me me, thiab tom qab ntawd vuam cov khoom loj. Thaum vuam resistors, ua kom cov resistors siab thiab qis. Ua tib zoo saib rau qhov "ntxiv" thiab "-" polarities ntawm lub capacitors thiab polarity ntawm lub diodes. Tuav cov hlau lead pins kom yooj yim rau cua sov dissipation.
Kev sib xyaw ua ke ntawm ob lub pins ntawm lub kaum sab nraud, thiab tom qab ntawd solders ib qho los ntawm sab laug mus rau sab xis, los ntawm sab saum toj mus rau hauv qab. Rau cov ntawv ci tooj liab ntawm lub rooj tsav xwm luam tawm, thaum lub solder nkag mus rau hauv qab ntawm IC tus pin, lub hau ntawm cov hlau soldering yuav tsum kov tus pin dua. Lub sij hawm sib cuag yuav tsum tsis pub tshaj 3 vib nas this, thiab lub solder yuav tsum tau muab qhwv ib ncig ntawm tus pin. Co tom qab soldering los xyuas seb puas muaj qhov xau, Kov vuam, vuam virtual, thiab ntxuav cov vuam ntawm cov pob qij txha.
5. Kev soj ntsuam zoo vuam
① Kev tshuaj xyuas qhov muag
Los ntawm cov tsos, xyuas seb qhov vuam zoo puas tsim nyog, seb puas muaj cov vuam ploj, puas muaj qhov seem nyob ib ncig ntawm cov pob qij txha, seb puas muaj vuam txuas ntxiv, txuas txuas txuas, seb puas muaj cov kab nrib pleb ntawm lub ncoo, seb cov pob qij txha puas yog. du, seb puas muaj ib qho phenomenon sharpening, thiab lwm yam.
② Kov tshuaj xyuas
Kov cov khoom nrog koj txhais tes kom pom tias muaj qhov xoob lossis tsis muaj zog. Siv lub koob yees duab los tuav cov hlau lead ntawm cov khoom thiab rub nws maj mam saib seb puas muaj qhov xoob. Thaum lub solder pob qij txha yog shaken, seb lub solder ntawm lawv ntog.