Txoj cai ntawm Far Infrared Thermometer Performance Index ntawm Far Infrared Thermometer
1. Kev kho deg ntawm weldments
Cov welds ntsib nyob rau hauv phau ntawv soldering hlau welding 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 cov khoom siv ntau lawm, cov khoom siv tau ntsib feem ntau yuav tsum tau ntxuav qhov chaw. Ua hauj lwm, tshem tawm xeb, roj, plua plav thiab lwm yam impurities uas cuam tshuam qhov vuam zoo ntawm qhov vuam nto. Mechanical scraping thiab cawv, acetone scrubbing thiab lwm yam yooj yim thiab yooj yim txoj kev yog feem ntau siv nyob rau hauv phau ntawv ua haujlwm.
2. Pre-welding
Pre-soldering yog ua kom ntub dej ua ntej cov khoom ua los yog cov khoom siv vuam yuav tsum tau soldered nrog solder, feem ntau kuj hu ua tinning, tinning, tinning, thiab lwm yam. txheej txheem ntawm soldering - lub solder wets saum npoo ntawm weldment, thiab qhov chaw ntawm lub vuam yog "plated" nrog ib txheej ntawm solder tom qab lub diffusion ntawm cov hlau ua ib tug bonding txheej.
Pre-soldering tsis yog ib qho tseem ceeb ntawm kev ua haujlwm rau kev sib tw, tab sis nws yuav luag tsis muaj qhov tseem ceeb rau phau ntawv soldering hlau vuam, tshwj xeeb tshaj yog txij nkawm, kev debugging, thiab kev tshawb fawb thiab kev loj hlob.
3. Tsis txhob siv dej ntau dhau
Qhov zoo 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 cov pob qij txha tom qab soldering, tab sis kuj ua rau lub sijhawm cua sov (rosin melts, volatilizes thiab tshem tawm cov cua sov), txo kev ua haujlwm; thiab thaum lub sij hawm cua sov tsis txaus, nws yog ib qho yooj yim uas yuav tsum tau tov rau hauv lub solder los tsim "Slag inclusion" defect.
Rau kev sib txuas ntawm cov khoom hloov pauv, cov flux ntau dhau yog yooj yim ntws mus rau cov neeg sib cuag, ua rau tsis zoo rau kev sib cuag. Qhov tsim nyog ntawm cov khoom siv hluav taws xob yuav tsum yog tias rosin naj hoom tsuas tuaj yeem ntub cov pob qij txha los tsim, thiab tsis txhob cia cov rosin naj hoom ntws los ntawm cov ntawv luam tawm mus rau cov khoom siv saum npoo los yog lub qhov (xws li IC socket). Rau cov xov hlau uas siv rosin cores, nws yog qhov tseem ceeb tsis tas yuav rov thov cov flux.
4. Khaws lub hau ntawm cov hlau soldering kom huv si
Vim hais tias lub taub hau ntawm cov hlau yog nyob rau hauv qhov kub thiab txias rau lub sij hawm ntev thaum lub sij hawm soldering, thiab nws tau raug tshav kub-decomposed tshuaj xws li flux, nws nto yog yooj yim oxidized los tsim ib txheej ntawm dub impurities, uas yuav luag tsim ib lub tshav kub rwb thaiv tsev. txheej, ua rau cov hlau taub hau poob nws cov cua sov. Yog li ntawd, rub cov impurities ntawm cov hlau thav duab txhua lub sijhawm. Nws kuj yog ib txoj hauv kev los so lub hau ntawm cov hlau nplaum nrog cov ntaub ntub dej los yog daim txhuam cev ntub dej txhua lub sijhawm.
5. Cua sov nyob ntawm tus choj solder
Hauv kev ua haujlwm tsis yog kev sib dhos, cov duab ntawm cov pob qij txha rau ib qho kev sib txuas yog ntau yam, thiab nws yog qhov tsis yooj yim rau peb lossi hloov lub ntsis ntawm cov hlau soldering. Txhawm rau txhim kho qhov ua tau zoo ntawm cov hlau taub hau cua sov, nws yog ib qho tsim nyog los tsim ib tus choj txuas rau kev hloov hluav taws xob. Lub npe hu ua solder choj txhais tau hais tias ib qho me me ntawm solder yog khaws cia rau ntawm cov hlau soldering raws li tus choj rau kev hloov hluav taws xob ntawm cov hlau taub hau thiab cov vuam thaum lub sij hawm cua sov.
Obviously, vim hais tias lub tshav kub conduction efficiency ntawm molten hlau yog ntau dua li ntawm cov huab cua, lub vuam yog sai rhuab mus rau lub vuam kub. Kev saib xyuas yuav tsum tau ua kom tsis txhob khaws cov tin ntau dhau raws li tus choj txuas.
6. Tus nqi ntawm solder yuav tsum tsim nyog
Cov khoom siv ntau dhau tsis tsuas yog siv cov khoom siv kim kim dua, tab sis kuj tseem ua kom lub sijhawm soldering thiab sib raug zoo txo qhov kev ua haujlwm 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, me ntsis solder tsis tuaj yeem tsim ib daim ntawv cog lus ruaj khov thiab txo lub zog ntawm cov pob qij txha. Tshwj xeeb tshaj yog thaum soldering hlau ntawm lub rooj tsavxwm, tsis txaus solder feem ntau ua rau cov xov hlau poob.
7. Vuam qhov chaw yuav tsum ruaj
Tsis txhob txav los yog vibrate lub vuam ua ntej lub solder solidifies, tshwj xeeb tshaj yog thaum siv tweezers los clamp lub vuam, nco ntsoov tos kom lub solder solidify ua ntej tshem tawm cov tweezers. Qhov no yog vim cov txheej txheem solder solidification yog txheej txheem crystallization. Raws li lub crystallization txoj kev xav, sab nraud quab yuam (kev txav ntawm lub vuam) thaum lub sij hawm crystallization yuav hloov cov crystallization tej yam kev mob, uas ua rau coarse crystals, uas ua rau lub thiaj li hu ua "kub vuam".
Cov tsos mob tshwm sim yog tias qhov saum npoo yog npub thiab taum dregs-zoo li; Cov txheej txheem sab hauv ntawm cov khoom siv sib txuas yog xoob, thiab nws yooj yim kom muaj huab cua sib txawv thiab tawg, ua rau txo qis ntawm lub zog ntawm cov khoom sib txuas thiab cov hluav taws xob tsis zoo. Yog li ntawd, lub vuam yuav tsum tau khaws cia ua ntej lub solder solidifies. Hauv kev ua haujlwm tiag tiag, ntau txoj hauv kev tsim nyog tuaj yeem siv los kho qhov vuam, lossis kev ntsuas clamping txhim khu kev qha tuaj yeem siv.
8. Ua tib zoo saib xyuas kev khiav tawm ntawm cov hlau soldering
Kev khiav tawm ntawm cov hlau soldering yuav tsum tau raws sijhawm, thiab lub kaum sab xis thiab cov kev taw qhia ntawm kev khiav tawm muaj qee qhov kev sib raug zoo nrog kev tsim cov pob qij txha. Maj mam tig cov hlau soldering thaum tshem nws tuaj yeem ua kom cov pob qij txha zoo soldered, uas yuav tsum muaj kev paub txog kev ua haujlwm tiag tiag.
