Tsim nyog tej yam kev mob rausoldering PCBcircuit boards
1.Lub vuam yuav tsum muaj weldability zoo
Lub npe hu ua solderability yog hais txog kev ua haujlwm ntawm cov hlau uas cov khoom siv hlau yuav tsum tau welded thiab cov solder tuaj yeem tsim kev sib xyaw ua ke zoo ntawm qhov tsim nyog. Tsis yog tag nrho cov hlau muaj zoo weldability. Qee cov hlau, xws li chromium, molybdenum, tungsten, thiab lwm yam, muaj qhov tsis zoo weldability; qee cov hlau, xws li tooj liab, tooj dag, thiab lwm yam, muaj qhov zoo dua weldability. Thaum lub sij hawm vuam, qhov kub siab ua rau cov oxide zaj duab xis tsim rau ntawm cov hlau nto, uas cuam tshuam rau weldability ntawm cov khoom. Txhawm rau txhim kho kev ua kom zoo dua qub, tin plating, nyiaj plating thiab lwm yam kev ntsuas tuaj yeem siv los tiv thaiv oxidation ntawm cov khoom nto.
2.Qhov saum npoo ntawm qhov vuam yuav tsum tau ua kom huv si
Txhawm rau kom ua tiav kev sib xyaw ua ke zoo ntawm cov khoom siv thiab vuam, qhov vuam nto yuav tsum tau ua kom huv si. Txawm tias cov weldments nrog zoo weldability, oxide zaj duab xis thiab roj stains uas muaj teeb meem rau wetting tej zaum yuav raug tsim nyob rau saum npoo ntawm weldment vim cia los yog kis kab mob. Cov av yuav tsum tau muab tshem tawm ua ntej welding, txwv tsis pub lub vuam zoo tsis tuaj yeem lav. Cov khaubncaws sab nraud povtseg me me ntawm cov hlau tuaj yeem raug tshem tawm los ntawm flux. Hlau nto nrog oxidation hnyav yuav tsum raug tshem tawm los ntawm kev siv tshuab lossis tshuaj, xws li scraping lossis pickling.
3.Siv cov flux tsim nyog
Lub luag haujlwm ntawm flux yog tshem tawm cov oxide zaj duab xis ntawm qhov chaw ntawm lub vuam. Cov txheej txheem vuam sib txawv yuav tsum muaj qhov sib txawv, xws li nickel-chromium alloy, stainless hlau, txhuas thiab lwm yam ntaub ntawv. Nws yog qhov nyuaj rau solder yam tsis muaj qhov tshwj xeeb flux. Thaum vuam precision cov khoom siv hluav taws xob xws li cov ntawv luam tawm hauv Circuit Court, txhawm rau ua kom cov vuam txhim khu kev qha thiab ruaj khov, rosin-raws li flux feem ntau yog siv. Feem ntau, cawv yog siv los yaj rosin rau hauv dej rosin.
4. Lub vuam yuav tsum tau rhuab mus rau qhov kub thiab txias
Thaum lub sij hawm welding, lub zog ntawm thermal zog yog yaj lub solder thiab cua sov cov khoom vuam, kom cov tin thiab txhuas atoms tau txais lub zog txaus los nkag mus rau hauv cov siv lead ua lattice rau saum npoo ntawm cov hlau yuav tsum tau welded los ua ib qho alloy. Yog tias qhov vuam kub qis dhau lawm, nws yuav ua rau muaj kev cuam tshuam rau kev nkag mus ntawm cov atoms solder, ua rau nws tsis tuaj yeem tsim cov hlau alloy, thiab nws yooj yim los tsim cov khoom cuav. Yog hais tias qhov vuam kub siab dhau lawm, lub solder yuav nyob rau hauv lub xeev uas tsis yog-eutectic, accelerating lub decomposition thiab volatilization tus nqi ntawm flux, ua rau qhov zoo ntawm cov solder deteriorate, thiab nyob rau hauv mob hnyav, yuav ua rau cov ntaub qhwv ntawm cov luam ntawv. Circuit board kom poob. Dab tsi yuav tsum tau hais txog yog tias tsis yog tsuas yog lub solder yuav tsum tau rhuab kom yaj, tab sis lub vuam yuav tsum tau rhuab mus rau ib tug kub uas yuav yaj lub solder.
5. Lub sijhawm vuam tsim nyog
Lub sijhawm vuam yog hais txog lub sijhawm xav tau rau kev hloov pauv ntawm lub cev thiab tshuaj lom neeg thaum lub sijhawm tag nrho cov txheej txheem vuam. Nws suav nrog lub sijhawm rau cov hlau yuav tsum tau welded kom ncav cuag qhov kub thiab txias, lub sij hawm melting ntawm lub solder, lub sij hawm rau flux ua hauj lwm thiab lub sij hawm rau cov hlau alloy tsim. Tom qab qhov ntsuas kub tau txiav txim siab, lub sijhawm vuam tsim nyog yuav tsum tau txiav txim siab raws li cov duab, xwm txheej, thiab cov yam ntxwv ntawm cov khoom yuav tsum tau welded. Yog tias lub sijhawm vuam ntev dhau lawm, cov khoom siv lossis cov khoom siv vuam yuav yooj yim puas; Yog hais tias lub sij hawm welding luv dhau lawm, cov kev cai vuam yuav tsis raug. Feem ntau, lub sijhawm siab tshaj plaws rau txhua qhov sib koom ua ke yuav tsum tau welded tsis pub dhau 5 vib nas this.
