Cov teeb meem thiab kev ntsuas ntawm yoj soldering (1)

Shenzhen Shenchuang Hi-tech Electronics Co., Ltd. Peb cov khoom tseem ceeb muaj xws li cov chargers mus ncig, tsheb chargers, USB cables, fais fab nyiaj hauv tuam txhab nyiaj thiab lwm yam khoom siv digital.Tag nrho cov khoom muaj kev nyab xeeb thiab txhim khu kev qha, nrog cov cim styles.products dhau daim ntawv pov thawj zoo li CE, FCC, ROHS, UL, PSE, C-Tick, thiab lwm yam. , Yog tias koj txaus siab rau, koj tuaj yeem tiv tauj ceo@schitec.com ncaj qha.

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Cov teeb meem thiab kev ntsuas ntawm yoj soldering (1)

Tsis txaus solder

Kev tiv thaiv kev tiv thaiv rau qhov ua rau

PCB preheating thiab vuam kub yog siab dhau lawm, kom cov viscosity ntawm molten solder tsawg dhau. Lub preheating kub yog 90-130 degree , thiab lub sab sauv txwv yog npaum li cas thaum muaj ntau yam yuav tsum tau mounted; tin nthwv dej kub yog 250 ± 5 degree, thiab lub sijhawm vuam yog 3-5s.

Lub qhov taub ntawm lub qhov ntxig yog qhov loj heev, thiab cov khoom siv ntws tawm ntawm lub qhov. Lub qhov taub ntawm lub qhov plug-in yog 0.15-0.4mm loj dua tus pin txoj kab uas hla (kwv yees qis qis rau tus pin zoo thiab qhov txwv sab sauv rau tus pin ntxhib).

Cov hlau lead me me loj, cov nplaum yog rub mus rau lub ncoo, kom cov pob qij txha qhuav qhuav. Lub ncoo tsim yuav tsum tau raws li qhov yuav tsum tau ntawm yoj soldering.

Qhov zoo ntawm lub qhov metallized tsis zoo los yog flux ntws mus rau hauv lub qhov. Xav txog PCB ua cov nroj tsuag, txhim kho kev ua haujlwm zoo.

Lub crest qhov siab tsis txaus. Nws tsis tuaj yeem ua rau PCB tsim lub siab ntawm cov khoom siv, uas tsis tsim nyog rau cov tin. Lub ncov siab yog feem ntau tswj ntawm 2/3 ntawm PCB thickness.

Lub kaum sab xis nce toj ntawm PCB yog me me, uas tsis tsim nyog rau cov pa tawm. PCB nce lub kaum sab xis yog 3-7 degree

Ntau dhau solder

Qhov kub ntawm qhov vuam yog qis dhau los yog qhov siv txoj hlua siv ceev nrawm dhau, yog li cov viscosity ntawm cov molten solder siab dhau lawm. Qhov kub ntawm tin yoj yog 250 ± 5 degree, thiab lub sijhawm vuam yog 3-5s.

Teem preheating kub raws li PCB loj, ntau txheej board, tus naj npawb ntawm cov khoom thiab seb cov khoom puas raug ntsia.

Kev ua haujlwm tsis zoo ntawm cov dej ntws tsis zoo lossis lub ntiajteb txawj nqus tsawg. Hloov cov flux los yog kho kom haum lub ntiajteb txawj nqus.

Tsis zoo solderability ntawm ncoo, ntxig lub qhov thiab tus pin. Txhawm rau txhim kho kev ua haujlwm zoo ntawm PCB, cov khoom siv yuav tsum tau siv ua ntej, tsis yog khaws cia hauv qhov chaw ntub dej.

Thaum qhov kev faib ua feem ntawm cov tin nyob rau hauv solder txo los yog impurity cov ntsiab lus nyob rau hauv solder yog siab dhau (Cu < 0.08%), viscosity thiab fluidity ntawm molten solder nce. Thaum qhov kev faib ua feem ntawm cov tin tsawg dua 61.4%, qee cov tin ntshiab tuaj yeem muab ntxiv kom zoo. Thaum lub impurity siab dhau lawm, lub solder yuav tsum tau hloov.

Ntau dhau solder residue. Cov khib nyiab yuav raug tshem tawm thaum kawg ntawm txhua hnub ua haujlwm.

Tin hlau

Lub preheating kub ntawm PCB yog tsawg heev, vim hais tias qhov kub ntawm PCB thiab cov khoom yog tsawg heev, lub solder splashed tawm thaum sib cuag nrog yoj crest yog pasted rau saum npoo ntawm PCB. Ua kom lub preheating kub los yog ncua lub sij hawm preheating.

Cov ntawv luam tawm yog damp. Dehumidification ntawm PCB.

Qhov kev tiv thaiv vuam zaj duab xis yog ntxhib thiab tsis sib npaug hauv thickness. Txhim kho qhov ua tau zoo ntawm PCB.

Missing welding (faulty welding) < rough, granular, poor gloss, poor fluidity >

Kev piav qhia: feem ntau, tooj liab tin alloy txheej ntawm qhov tsim nyog thickness tsis tsim nyob rau hauv kev sib koom ua ke ciam teb thaum lub sij hawm brazing.

Ua rau ploj (faulty) vuam:

1. Cov khoom siv hluav taws xob tsis txaus vim qhov kub tsis tshua muaj brazing Solder groove kub tsis tshua muaj - clamping ceev ceev heev - tsis zoo tsim.

2. Tsis zoo solderability ntawm PCB los yog cov khoom siv lead ua Oxidation muaj kuab paug ntawm lub hauv paus hlau sib koom - siab kub solder kub - tsis tshua muaj solder kub - ntev vuam lub sij hawm.

3. Lub solder shakes ua ntej solidification.

4. Flux yog ntws hauv.

Kev daws rau qhov ploj lawm (faulty) vuam:

1. Ntxuav txhua qhov chaw welded ua ntej vuam. Xyuas kom weldability.

2. Kho qhov vuam kub.

3. Txhim kho cov dej ntws.

4. Xaiv lub sijhawm vuam tsim nyog.

5. Txhim kho qhov chaw cia khoom thiab txo lub sijhawm khaws cia ntawm PCB thiab cov khoom siv.

Txias vuam

Kev piav qhia ntawm cov ntsiab lus vuam txias: tom qab yoj soldering, muaj qhov tsis sib xws ntawm cov welds nrog surge zoo ntawm cov pob qij txha, thiab tsis muaj ntub dej los yog tsis txaus ntub ntawm lub hauv paus hlau thawv solders, los yog txawm tawg.

Vim qhov kev vibration ntawm txoj siv conveyor, lub solder yog tsis zoo vim yog sab nraud quab yuam thaum nws txias. Xyuas seb lub cev muaj zog puas yog thiab seb qhov voltage puas ruaj khov. Seb txoj siv conveyor muaj txawv teb chaws.

Qhov kub ntawm qhov vuam yog qis dhau los yog qhov siv txoj hlua siv ceev nrawm dhau, yog li cov viscosity ntawm cov molten solder siab dhau lawm. Wrinkle lub solder sib koom nto. Qhov kub ntawm tin yoj yog 250 ± 5 degree, thiab lub sijhawm vuam yog 3-5s. Thaum qhov kub thiab txias me ntsis, txoj siv conveyor yuav tsum tau qeeb.

Ua rau txias vuam:

1. solder groove kub yog tsawg.

2. Lub clamping ceev yog siab dhau thiab lub sijhawm vuam yog luv.

3. Thaum lub sij hawm ib txwm welding ntawm PCB, vim lub peev xwm loj ntawm cov khoom siv tus pin solder pob qij txha, cov cua sov uas tsis txaus.

Cold welding daws:

1. Ua kom lub qhov kub ntawm qhov kub.

2. Txo qhov nrawm nrawm thiab tswj lub sijhawm vuam tsis pub dhau 3-5s.

3. Ua kom lub preheating kub kom txo cov thermal shock ntawm PCB los ntawm preheating cheeb tsam mus rau solder zawj.