welding cov tswv yim thiab peev xwm rau soldering hlau
Soldering hlau pre-welding kev kho thiab vuam cov kauj ruam (vuam txoj kev ntawm hluav taws xob soldering hlau)
(1) Cov kauj ruam kho ua ntej vuam
Ua ntej soldering, cov khoom siv pins lossis cov khoom siv hluav taws xob ntawm lub rooj tsav xwm yuav tsum ua tiav. Feem ntau, muaj peb kauj ruam ntawm "scraping", "plating" thiab "testing":
"Scraping": Nws yog los ntxuav qhov vuam ua ntej vuam. Feem ntau, cov cuab yeej siv yog rab riam thiab cov ntawv xuab zeb zoo los ntxuav cov pins ntawm kev sib xyaw ua ke thiab cov ntawv luam tawm hauv Circuit Court kom tshem tawm cov av ntawm lawv. Tom qab ntxuav, nws yog feem ntau yuav tsum tau siv flux rau cov khoom kom tshem tawm.
"Plating": Nws yog tin plating ntawm cov khoom seem. Txoj kev tshwj xeeb yog dip cov tshuaj rosin cawv thiab siv rau ntawm cov khoom seem ntawm cov khoom siv vuam, tom qab ntawd nias lub taub hau kub soldering hlau nrog tin rau nws, thiab tig cov khoom kom sib npaug ntawm cov txheej txheej ntawm tin txheej.
"Testing": Nws yog siv lub multimeter los ntsuam xyuas seb tag nrho cov tinned Cheebtsam yog cov zoo txhim khu kev qha. Yog tias muaj cov khoom siv tsis raug lossis puas tsuaj, lawv yuav tsum tau hloov nrog cov khoom ntawm tib lub ntsiab lus.
(2) Vuam cov kauj ruam
Tom qab kev kho ua ntej welding tiav lawm, txoj kev vuam tuaj yeem ua tiav.
Cov khoom sib txawv ntawm cov khoom siv sib txawv yuav tsum tau ua haujlwm sib txawv ntawm cov hlau soldering. Thaum txiav txim siab qhov kub ntawm cov hlau taub hau, koj tuaj yeem kov cov hlau soldering rau rosin. Yog tias muaj lub suab "squeak", nws txhais tau hais tias qhov kub thiab txias yog qhov tsim nyog; yog tias tsis muaj suab nrov, tab sis cov rosin yuav NW nyuam qhuav yaj, nws txhais tau hais tias qhov kub thiab txias yog qis heev; Thaum cov rosin haus luam yeeb ntau, nws txhais tau hais tias qhov kub thiab txias heev.
Feem ntau hais lus, muaj peb kauj ruam tseem ceeb hauv kev vuam:
(1) Melt ib qho me me ntawm cov solder thiab rosin rau ntawm qhov kawg ntawm cov hlau soldering, thiab ua kom lub taub hau ntawm cov hlau soldering thiab cov hlau solder ntawm qhov sib koom ua ke tib lub sijhawm.
(2) Ua ntej cov flux ntawm qhov kawg ntawm cov hlau soldering tau evaporated, kov lub ntsis ntawm cov hlau soldering thiab cov hlau solder rau lub solder sib koom tib lub sij hawm, thiab pib yaj lub solder.
(3) Thaum lub solder infiltrates tag nrho cov sib koom ua ke, tshem tawm cov hlua hlau thiab cov hlua hlau tib lub sijhawm.
Cov txheej txheem vuam feem ntau haum rau 2 mus rau 3 vib nas this. Thaum soldering integrated circuits, tus nqi ntawm solder thiab flux yuav tsum nruj me ntsis tswj. Txhawm rau kom tsis txhob muaj kev puas tsuaj rau kev sib xyaw ua ke vim qhov tsis zoo ntawm cov hluav taws xob hluav taws xob hluav taws xob los yog cov hluav taws xob hluav taws xob ntawm lub tshuab hluav taws xob sab hauv rau lub plhaub, hauv kev siv tswv yim, cov txheej txheem ntawm kev tshem tawm lub hwj chim ntsaws ntawm cov hluav taws xob soldering hlau feem ntau yog siv rau solder thaum nws kub.
False Vuam ntawm Hluav Taws Xob Soldering Hlau thiab Nws Tiv Thaiv
Thaum vuam, nws yuav tsum tau ua kom ntseeg tau tias txhua qhov sib koom ua ke yog ruaj khov thiab sib cuag zoo. Cov pob qij txha yuav tsum ci, du thiab tsis muaj burrs, thiab tus nqi ntawm cov tin yuav tsum yog nruab nrab. Cov tin thiab cov khoom yuav tsum tau welded yog ruaj khov, thiab yuav tsum tsis txhob muaj qhov cuav vuam. Qhov hu ua cuav vuam txhais tau hais tias tsuas yog ib qho me me ntawm cov tin yog welded ntawm qhov sib koom ua ke, ua rau muaj kev sib cuag tsis zoo thiab tsis sib xws. Txhawm rau kom tsis txhob muaj kev sib tsoo tsis raug, cov ntsiab lus hauv qab no yuav tsum tau them rau:
(1) xyuas kom meej tias cov hlau nto huv si
Yog hais tias muaj xeb, av los yog oxides nyob rau saum npoo ntawm cov vuam thiab cov pob qij txha, nws yuav tsum tau muab txhuam los yog xuab zeb nrog rab riam ua ntej vuam kom txog rau thaum cov hlau ci ci, thiab tom qab ntawd ces qhov chaw ntawm cov vuam los yog cov pob qij txha tuaj yeem tinned.
(2) Ntsuas qhov kub thiab txias
Txhawm rau ua kom qhov kub thiab txias tsim nyog, lub tshuab hluav taws xob hluav taws xob uas muaj lub zog tsim nyog yuav tsum tau xaiv raws li qhov loj ntawm cov khoom, thiab yuav tsum tau them nyiaj rau lub sijhawm cua sov. Yog tias koj siv lub tshuab hluav taws xob uas tsis tshua muaj hluav taws xob los txuas cov khoom loj los yog vuam cov hlau hauv av ntawm lub phaj hlau, nws yog ib qho yooj yim los tsim ib qho kev sib txuas.
Thaum lub taub hau ntawm cov hlau nplaum raug nias rau ntawm qhov chaw soldering nrog solder, yog tias tsis muaj los yog me ntsis solder sab laug ntawm qhov soldered tom qab tshem cov hlau soldering, nws txhais tau hais tias lub sij hawm cua sov yog luv heev, qhov kub tsis txaus los yog cov khoom siv welded yog qias neeg heev; Yog hais tias lub solder ntws los ua ntej lub soldering hlau, nws txhais tau hais tias lub sij hawm cua sov yog ntev heev thiab kub siab heev.
(3) Tsim nyog tus nqi ntawm tin
Txiav txim siab tus nqi ntawm cov tin dipped los ntawm cov hlau soldering raws li qhov loj ntawm qhov yuav tsum tau muaj kev sib koom tes, yog li ntawd lub solder yog txaus los npog cov khoom yuav tsum tau soldered thiab tsim ib tug du solder sib koom ua ke ntawm tsim nyog loj. Yog hais tias lub tin tsis txaus nyob rau hauv ib lub sij hawm, nws yuav tsum tau muab ntxiv, tab sis lub soldering hlau yuav tsum tau muab tshem tawm tom qab lub yav dhau los tin yog melted ua ke.
(4) Xaiv cov flux tsim nyog
Kev ua haujlwm ntawm cov flux yog txhawm rau txhim kho cov kua dej ntawm cov khoom siv, tiv thaiv oxidation ntawm cov nplaim taws, thiab ua lub luag haujlwm ntawm fluxing thiab tiv thaiv. Thaum soldering cov khoom siv hluav taws xob, solder paste yuav tsum zam kom ntau li ntau tau. Ib tug zoo flux yog rosin cawv tov. Thaum welding, cia li poob me ntsis ntawm qhov chaw yuav tsum tau welded.
