Qhov zoo ntawm soldering muaj kev cuam tshuam loj heev rau tag nrho qhov zoo ntawm cov PCB. Los ntawm kev sib txuas, qhov sib txawv ntawm PCB txuas nrog rau lwm cov khoom siv hluav taws xob kom ua rau PCB ua haujlwm zoo thiab ua tiav nws lub hom phiaj. Thaum cov kws tshaj lij kev lag luam ntsuas qhov zoo ntawm cov khoom siv hluav taws xob thiab cov khoom siv, ib qho tseem ceeb tshaj plaws nyob rau hauv kev ntsuam xyuas yog lub peev xwm ntawm solder.

Kom paub meej, vuam yog yooj yim heev. Tab sis qhov no yuav tsum tau xyaum ua tus tswv. Raws li cov lus hais mus, “kev xyaum ua tau zoo tag nrho.” Txawm tias ib tug novice tuaj yeem ua haujlwm tau zoo. Tab sis rau tag nrho lub neej thiab kev ua haujlwm ntawm cov khoom siv, kev ua haujlwm huv thiab kev ua haujlwm vuam yog qhov yuav tsum tau ua.

Hauv phau ntawv qhia no, peb qhia txog qee yam teeb meem uas tshwm sim thaum lub sij hawm vuam txheej txheem. Yog tias koj xav paub ntau ntxiv txog tus nqi ntau npaum li cas los ua kom zoo meej solder, qhov no yog koj phau ntawv qhia.

Dab tsi yog qhov zoo tshaj plaws solder joint?

Nws yog ib qho nyuaj rau suav tag nrho cov hom ntawm cov pob qij txha nyob rau hauv ib qho kev txhais. Nyob ntawm seb hom solder, PCB siv lossis cov khoom txuas nrog PCB, qhov zoo tshaj plaws solder sib koom yuav hloov pauv loj heev. Txawm li cas los xij, feem ntau zoo meej solder pob qij txha tseem muaj:

Ua kom ntub dej

Smooth thiab ci ntsa iab

Neat recessed ces kaum

Txhawm rau kom tau txais cov pob qij txha zoo tshaj plaws, txawm tias nws yog SMD cov pob qij txha los yog cov pob qij txha los ntawm qhov sib txuas, yuav tsum siv tus nqi tsim nyog, thiab cov ntsiab lus ntawm cov hlau uas tsim nyog yuav tsum tau ua kom sov rau qhov kub thiab txias. PCB. Tshem tawm oxide txheej.

Cov hauv qab no yog cuaj qhov teeb meem feem ntau thiab qhov yuam kev uas tuaj yeem tshwm sim thaum vuam los ntawm cov neeg ua haujlwm tsis muaj kev paub:

1. Vuam choj

PCBs thiab cov khoom siv hluav taws xob tau txais me me thiab me, thiab nws nyuaj rau kev tswj xyuas ib puag ncig PCB, tshwj xeeb tshaj yog thaum sim solder. Yog hais tias lub hau ntawm cov hlau soldering koj siv loj dhau rau PCB, ib qho kev sib txuas ntau dhau yuav raug tsim.

Soldering choj hais txog thaum cov khoom siv txuas txuas ob lossis ntau dua PCB txuas. Qhov no yog qhov txaus ntshai heev. Yog tias nws mus tsis tau, nws yuav ua rau lub rooj tsav xwm Circuit Court luv luv thiab hlawv. Nco ntsoov ib txwm siv qhov loj me me soldering hlau taub kom tiv thaiv cov txuas hniav.

2. Ntau dhau solder

Novices thiab beginners feem ntau siv ntau heev solder thaum solder, thiab loj npuas-zoo li tus solder npas yog tsim nyob rau hauv lub solder pob qij txha. Ntxiv rau qhov zoo li kev loj hlob txawv ntawm PCB, yog tias qhov sib koom ua haujlwm tau zoo, nws yuav nyuaj rau nrhiav. Muaj ntau chav rau kev ua yuam kev nyob rau hauv cov pob solder.

Qhov kev xyaum zoo tshaj plaws yog siv solder sparingly thiab ntxiv solder yog tias tsim nyog. Lub solder yuav tsum huv si li sai tau thiab muaj zoo recessed fab.

3. Txias seam

Thaum qhov kub ntawm cov hlau soldering qis dua qhov zoo tshaj qhov kub, los yog lub sij hawm cua sov ntawm lub solder sib koom yog luv luv, ib tug txias solder sib koom yuav tshwm sim. Cov seams txias muaj qhov npub, ntxhov, zoo li lub hnab ntim khoom. Tsis tas li ntawd, lawv muaj lub neej luv luv thiab kev ntseeg tsis zoo. Nws kuj yog ib qho nyuaj rau kev ntsuam xyuas seb cov pob qij txha txias yuav ua tau zoo nyob rau hauv cov xwm txheej tam sim no lossis txwv kev ua haujlwm ntawm PCB.

4. Hlawv tawm node

Lub qhov cub tawg yog qhov sib txawv ntawm qhov sib koom ua ke txias. Obviously, cov hlau nplaum ua haujlwm ntawm qhov kub siab tshaj qhov ntsuas kub zoo, cov pob qij txha tawg ua rau PCB mus rau qhov chaw kub ntev dhau, lossis tseem muaj txheej txheej ntawm oxide ntawm PCB, uas cuam tshuam qhov zoo tshaj plaws tshav kub hloov. Qhov saum npoo ntawm qhov sib koom ua ke yog hlawv. Yog tias lub ncoo tau nqa ntawm qhov sib koom ua ke, PCB yuav raug puas tsuaj thiab kho tsis tau.

5. Toj ntxa

Thaum sim txuas cov khoom siv hluav taws xob (xws li transistors thiab capacitors) rau PCB, tombstones feem ntau tshwm sim. Yog hais tias tag nrho cov sab ntawm cov khoom yog txuas mus rau cov ntaub qhwv thiab soldered, cov khoom yuav ncaj.

Ua tsis tiav qhov ntsuas kub uas yuav tsum tau ua rau cov txheej txheem vuam yuav ua rau ib lossis ntau sab los nqa, ua rau lub qhov ntxa zoo li zoo li. Lub tombstone ntog tawm yuav cuam tshuam rau lub neej ntawm cov pob qij txha thiab yuav muaj kev cuam tshuam tsis zoo rau kev ua haujlwm thermal ntawm PCB.

Ib qho teeb meem uas tshwm sim ntau tshaj plaws uas ua rau lub qhov ntxa tawg thaum lub sij hawm reflow soldering yog tsis sib xws nyob rau hauv lub qhov cub reflow, uas yuav ua rau kom ntxov ntxov wetting ntawm solder nyob rau hauv tej qhov chaw ntawm lub PCB txheeb ze rau lwm qhov chaw. Tus kheej-ua reflow qhov cub feem ntau muaj teeb meem ntawm cov cua sov tsis sib xws. Yog li ntawd, nws raug nquahu kom koj yuav cov cuab yeej tshaj lij.

6. Kev ntub dej tsis txaus

Ib qho ntawm feem ntau yuam kev ua los ntawm beginners thiab novices yog tsis muaj wettability ntawm solder pob qij txha. Tsis zoo wetted solder pob qij txha muaj tsawg dua solder xav tau rau kev sib txuas ntawm PCB pads thiab cov khoom siv hluav taws xob txuas nrog PCB los ntawm solder.

Kev sib cuag tsis zoo yuav luag yuav txwv lossis ua rau kev ua haujlwm ntawm cov khoom siv hluav taws xob, kev ntseeg siab thiab kev pabcuam lub neej yuav ua rau tsis zoo, thiab tseem tuaj yeem ua rau luv luv, yog li ua rau lub PCB puas. Qhov teeb meem no feem ntau tshwm sim thaum siv tsis txaus solder hauv cov txheej txheem.

7. dhia vuam

Dhia vuam tej zaum yuav tshwm sim nyob rau hauv ob txhais tes ntawm lub tshuab vuam los yog inexperienced welders. Tej zaum nws yuav tshwm sim vim tus neeg teb xov tooj tsis muaj concentration. Ib yam li ntawd, cov tshuab tsis raug teeb tsa yuav yooj yim hla cov pob qij txha los yog ib feem ntawm cov pob qij txha.

Qhov no tawm hauv Circuit Court nyob rau hauv lub xeev qhib thiab lov tes taw tej thaj chaw los yog tag nrho PCB. Siv koj lub sijhawm thiab xyuas tag nrho cov pob qij txha ua tib zoo.

8. Lub ncoo yog nqa tuaj

Vim yog lub zog ntau dhau los yog kub dhau ntawm PCB thaum lub sijhawm ua haujlwm, cov ntaub qhwv ntawm cov pob qij txha yuav nce. Lub ncoo yuav txhawb nqa qhov chaw ntawm PCB, thiab muaj kev pheej hmoo ntawm luv luv Circuit Court, uas yuav ua rau tag nrho cov Circuit Court puas. Nco ntsoov rov nruab cov ntaub qhwv rau ntawm PCB ua ntej soldering cov khoom.

9. Webbing thiab txaws

Thaum lub rooj tsav xwm hauv Circuit Court raug paug los ntawm cov kab mob uas cuam tshuam rau cov txheej txheem soldering los yog vim siv tsis txaus ntawm cov flux, webbing thiab spatter yuav raug tsim tawm ntawm lub rooj tsav xwm Circuit Court. Ntxiv nrog rau qhov tsis zoo ntawm PCB, webbing thiab splashing kuj yog qhov teeb meem luv luv, uas tuaj yeem ua rau lub rooj tsav xwm puas tsuaj.