8 lub tswv yim ua haujlwm rau soldering nrog hluav taws xob soldering hlau:
1. Kev kho deg ntawm welded qhov chaw
Cov khoom siv vuam tau ntsib hauv phau ntawv soldering yog ntau yam khoom siv hluav taws xob thiab cov xov hlau. Tshwj tsis yog cov khoom siv hluav taws xob nyob rau hauv "lub sij hawm pov hwm" yog siv nyob rau hauv kev tsim khoom loj, kev ua haujlwm tu saum npoo feem ntau yuav tsum tau tshem tawm xeb, roj stains, plua plav thiab lwm yam impurities uas cuam tshuam rau qhov vuam zoo ntawm qhov chaw vuam. Hauv kev ua haujlwm ntawm phau ntawv, txoj kev yooj yim thiab yooj yim xws li kev siv tshuab scraping, cawv, thiab acetone scrubbing feem ntau yog siv.
2. Ua ntej vuam
Pre soldering yog hais txog wetting cov hlau lead lossis conductive soldering qhov chaw ntawm cov khoom yuav tsum tau soldered nrog solder ua ntej, feem ntau hu ua tin plating, tin txheej, tin txheej, thiab lwm yam. ntawm soldering - lub solder ntub rau saum npoo ntawm lub solder, tsim ib tug bonding txheej los ntawm diffusion ntawm hlau, thiab ces deposits ib txheej ntawm solder nyob rau saum npoo ntawm lub solder.
Pre soldering tsis yog ib qho tseem ceeb ntawm kev ua haujlwm rau soldering, tab sis nws yog ib qho tseem ceeb rau kev siv phau ntawv soldering, tshwj xeeb tshaj yog rau kev tu, debugging, thiab kev txhim kho kev ua haujlwm.
3. Tsis txhob siv dej ntau dhau
Qhov tsim nyog ntawm flux yog qhov tseem ceeb, tab sis tsis txhob xav tias ntau dua yog qhov zoo dua. Cov rosin ntau dhau tsis tsuas yog ua rau kev ua haujlwm ntawm kev tu ib puag ncig ntawm kev sib koom ua ke tom qab vuam, tab sis kuj ua rau lub sijhawm cua sov (rosin melting, volatilization xav tau thiab tshem tawm cov cua sov), txo kev ua haujlwm; Thaum lub sij hawm cua sov tsis txaus, nws yog ib qho yooj yim uas yuav tsum tau tov rau hauv lub solder thiab daim ntawv "slag inclusion" defects.
Cov flux ntau dhau tuaj yeem yooj yim ntws mus rau cov neeg sib cuag thaum lub sijhawm vuam ntawm cov khoom hloov pauv, ua rau kev sib cuag tsis zoo. Qhov tsim nyog ntawm cov khoom siv hluav taws xob yuav tsum yog tias cov roj tsw qab xoob tsuas tuaj yeem ntub cov khoom sib koom ua ke los tsim, thiab cov tshuaj tsw qab xoob yuav tsum tsis txhob ntws mus rau hauv cov khoom siv los yog lub qhov (socket) (xws li IC socket) los ntawm cov ntawv luam tawm. Rau welding hlau siv rosin core, nws yog ib qho tseem ceeb tsis tas yuav thov flux dua.
4. Khaws lub taub hau kom huv si
Vim hais tias lub taub hau ntawm lub taub hau yog nyob rau hauv qhov kub thiab txias rau lub sij hawm ntev thaum vuam thiab los rau hauv kev sib cuag nrog cov khoom xws li flux uas yog thermally decomposed, nws nto yog yooj yim oxidized thiab tsim ib txheej ntawm impurities dub, uas yuav luag tsim ib txheej rwb thaiv tsev. , ua rau lub taub hau hlau soldering poob nws cov cua sov. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau so tawm impurities ntawm cov hlau tuav. Nws kuj yog ib txoj hauv kev los so cov hlau nplaum nrog cov ntaub ntub dej los yog daim txhuam cev txhua lub sijhawm.
5. Cua sov cia siab rau cov txuas txuas txuas
Hauv kev ua haujlwm tsis sib dhos, muaj ntau cov duab ntawm cov pob qij txha uas tuaj yeem welded ib zaug, thiab peb tsis tuaj yeem hloov pauv lub taub hau hlau. Txhawm rau txhim kho cov cua sov ua haujlwm ntawm lub taub hau hlau soldering, nws yog ib qho tsim nyog los tsim ib qho kev sib txuas rau kev hloov hluav taws xob. Lub npe hu ua solder choj yog ib tug choj uas khaws cia me me ntawm cov khoom siv ntawm cov hlau soldering raws li cov hluav taws xob hloov hluav taws xob ntawm lub taub hau hlau thiab cov hlua khi thaum cua sov.
Obviously, vim muaj ntau dua thermal conductivity efficiency ntawm molten hlau piv rau huab cua, welded ib feem yog sai rhuab mus rau lub vuam kub. Nws yuav tsum tau muab sau tseg tias tus nqi ntawm cov tin khaws cia raws li ib tug solder choj yuav tsum tsis txhob ntau dhau.
6. Tus nqi soldering yuav tsum tsim nyog
Ntau dhau soldering tsis tsuas yog tsis tsim nyog siv cov tin kim dua, tab sis kuj nce lub sij hawm soldering thiab correspondingly txo kev ua hauj lwm ceev. Qhov loj tshaj yog tias nyob rau hauv high-density circuits, ntau tin tuaj yeem yooj yim ua rau imperceptible luv circuits. Txawm li cas los xij, tsis txaus soldering tsis tuaj yeem tsim ib daim ntawv cog lus, txo lub zog ntawm cov pob qij txha. Tshwj xeeb tshaj yog thaum soldering hlau ntawm lub rooj tsavxwm, tsis txaus soldering feem ntau ua rau hlau detachment.
7. Cov welded qhov chaw yuav tsum ruaj
Tsis txhob txav los yog vibrate lub solder ua ntej nws solidifies, tshwj xeeb tshaj yog thaum siv tweezers clamp lub solder. Nco ntsoov tos kom lub solder solidify ua ntej tshem cov tweezers. Qhov no yog vim cov txheej txheem solidification ntawm solder yog txheej txheem crystallization. Raws li crystallization txoj kev xav, sab nraud quab yuam (welding txav) thaum lub sij hawm crystallization txheej txheem tuaj yeem hloov cov crystallization tej yam kev mob, ua rau coarse crystals thiab ua rau hu ua "txias vuam".
Cov tsos mob tshwm sim yog tias qhov saum npoo yog npub thiab zoo li taum residue; Cov qauv sab hauv ntawm cov khoom sib txuas yog xoob, nws yooj yim rau huab cua sib txawv thiab cov kab nrib pleb, ua rau txo qis ntawm lub zog ntawm kev sib koom tes thiab kev ua haujlwm tsis zoo. Yog li ntawd, ua ntej lub solder solidifies, nws yog ib qhov tsim nyog yuav tau ua kom lub solder nyob ruaj ruaj. Hauv kev ua haujlwm zoo, ntau txoj hauv kev tsim nyog tuaj yeem siv los kho cov solder lossis txhim khu kev qha clamping ntsuas tuaj yeem siv.
8. Muaj cov lus qhia tshwj xeeb rau kev tshem cov hlau soldering
Kev khiav tawm ntawm cov hlau soldering yuav tsum tau ua kom raws sijhawm, thiab lub kaum sab xis thiab kev taw qhia thaum khiav tawm muaj qee yam kev sib raug zoo nrog kev tsim ntawm cov khoom sib txuas. Maj mam tig cov hlau soldering thaum tshem tawm kom tswj tau qhov tsim nyog ntawm cov khoom siv ntawm qhov sib koom ua ke, uas yuav tsum muaj kev paub txog kev ua haujlwm.
