Vuam cov txheej txheem thiab qhov tseem ceeb ntawm hluav taws xob soldering hlau
1. Kev kho deg ntawm vuam qhov chaw
Cov khoom siv vuam tau ntsib nyob rau hauv phau ntawv soldering hlau vuam yog ntau yam khoom siv hluav taws xob thiab cov xov hlau. Tshwj tsis yog tias cov khoom siv hluav taws xob nyob rau hauv "lub sijhawm pov hwm" yog siv nyob rau hauv kev tsim khoom loj, kev ua haujlwm huv si 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. Tej yam yooj yim thiab yooj yim txoj kev xws li mechanical scraping thiab cawv, acetone scrubbing, thiab lwm yam yog feem ntau siv nyob rau hauv phau ntawv ua haujlwm.
2. Ua ntej vuam
Pre soldering yog hais txog wetting cov hlau lead lossis conductive welding 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 solder, thiab tsim ib tug sib txuas txheej los ntawm diffusion ntawm hlau, uas ua rau ib tug txheej ntawm solder txheej 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, thiab cua sov nqa tawm), 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.
Thaum welding hloov cov khoom, ntau dhau flux tuaj yeem yooj yim ntws mus rau cov neeg sib cuag, ua rau muaj kev sib cuag tsis zoo. Qhov tsim nyog ntawm cov khoom siv hluav taws xob yuav tsum yog tias cov tshuaj tsw qab xoob tsuas tuaj yeem ntub cov khoom sib koom ua ke kom tsim tau, thiab cov tshuaj tsw qab xoob yuav tsum tsis txhob ntws mus rau hauv cov khoom siv los yog qhov (socket) qhov (xws li IC socket) los ntawm cov ntawv luam tawm. Rau welding xov hlau nrog rosin core, nws yog ib qho tseem ceeb tsis tas yuav thov cov 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-kub ntev ntev thaum lub sij hawm vuam thiab los rau hauv kev sib cuag nrog cov khoom xws li flux uas undergo thermal decomposition, nws nto yog yooj yim oxidized thiab tsim ib txheej ntawm dub impurities, uas yuav luag tsim ib tug rwb thaiv tsev. txheej, ua rau lub taub hau soldering hlau poob nws cov cua sov. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum so cov impurities ntawm cov hlau thav duab txhua lub sijhawm. Nws kuj yog ib txoj hauv kev los so lub taub hau hlau nrog cov ntaub ntub dej lossis 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 yam duab ntawm cov pob qij txha uas tuaj yeem welded ib zaug, thiab peb tsis tuaj yeem hloov lub taub hau ntawm lub taub hau. 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 ib qho 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 vuam thaum lub sij hawm cua sov.
Obviously, vim muaj ntau dua thermal conductivity efficiency ntawm cov kua hlau piv rau huab cua, lub vuam yog sai rhuab mus rau 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. Ntau qhov tseeb, nyob rau hauv high-density circuits, ntau tshaj tin tuaj yeem ua rau tsis muaj kev cuam tshuam luv luv. Txawm li cas los xij, me ntsis 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 cov hlau detachment.
7. Weldments 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 rog (welding piece txav) thaum lub sij hawm crystallization txheej txheem yuav hloov cov crystallization tej yam kev mob, ua rau crystal coarseness thiab thiaj li hu ua "kub vuam".
Cov tsos mob tshwm sim yog qhov saum npoo yog matte thiab nyob rau hauv cov duab ntawm taum residue; Cov qauv sab hauv ntawm qhov sib koom tes yog xoob, nws yooj yim rau huab cua qhov sib txawv thiab cov kab nrib pleb, uas ua rau txo qis ntawm lub zog ntawm cov sib koom ua ke 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. Cov lus qhia 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 cov pob qij txha. 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.
