1. Flux ntws / lub ntiajteb txawj nqus / rosin cov ntsiab lus thiab nws cov dej num thiab kub tsis kam.
2. Preheating kub, tshaj kev sib kis ceev, coj lub kaum ntse ntse, lub sij hawm soldering, qhov kub ntawm qhov sib txawv ntawm ob lub nthwv dej, qhov kev ncua deb ntawm ob lub nthwv dej, waveform, yoj ntws tus nqi, qhov siab ntawm ob lub nthwv dej, yoj crest tsis tiaj tus, hla lub Kev taw qhia ntawm lub cub tawg, lub ncoo tsim loj heev, lub ncoo tsim yog ze dhau, tsis muaj TO tin taw tes, cov ntsiab lus tooj liab ntawm tin, PCB zoo, PCB ya raws, ib puag ncig yam, tin cub taws kub, thiab lwm yam. Cov no yuav ua rau yoj soldering txawm tias tin. .
1. Tsis tsim nyog preheating kub. Tsis tshua muaj kub yuav ua rau tsis zoo ua kom tsis zoo ntawm cov flux lossis PCB board thiab qhov kub tsis txaus, ua rau qhov kub tsis txaus, kom cov kua nplaum ntub dej thiab cov dej tsis zoo, cov kab uas nyob ib sab ntawm tus choj sib txuas.
2. PCB board nto tsis huv. Lub rooj tsavxwm tsis huv, cov kua nplaum nyob rau hauv PCB nto fluidity yuav raug cuam tshuam rau qee yam, tshwj xeeb tshaj yog nyob rau lub sijhawm ntawm kev sib cais, solder yog thaiv ntawm cov pob qij txha, kev tsim cov txuas hniav; 3, impure solder, solder nyob rau hauv cov impurities ua ke ntau tshaj cov qauv tso cai, cov yam ntxwv ntawm lub solder yuav hloov, ntub dej los yog fluidity yuav maj mam deteriorate, yog hais tias antimony muaj ntau tshaj 1.0 feem pua, arsenic ntau tshaj {{4. }}.2 feem pua , ntau dua 0.15 feem pua , qhov fluidity ntawm cov solder yuav raug txo los ntawm 25 feem pua, thaum cov ntsiab lus arsenic tsawg dua 0.005 feem pua yuav tawm ntawm wetting.
3. Cov khoom siv tsis huv, cov khoom siv sib xyaw ua ke ntau dua li cov qauv tso cai, cov yam ntxwv ntawm cov solder yuav hloov, ntub dej lossis kev txav mus los yuav maj mam zuj zus, yog tias cov antimony muaj ntau tshaj 1.0 feem pua, arsenic ntau dua. 0.2%. .
4. flux phem, phem flux tsis tuaj yeem ntxuav PCB, yog li ntawd lub solder nyob rau hauv lub tooj liab foil nto wetting quab yuam yog txo, ua rau tsis zoo wetting.
5. PCB board dip tin tob heev, qhov teeb meem no yuav tshwm sim nyob rau hauv cov chav kawm ntawv IC Cheebtsam los yog tus pin ntom ntom loj los ntawm-lub qhov Cheebtsam, tsim ntawm lub essence ntawm yog vim li cas yog noj tin ntev dhau lawm, flux yog kiag li decomposed los yog tsis. tin fluent, solder pob qij txha tsis nyob rau hauv ib tug zoo lub xeev ntawm desoldering.
6. Cov pins tivthaiv yog ntev, qhov ua rau ntawm tus choj tivthaiv yog cov pins ntev dhau los ua rau cov pob qij txha uas nyob ib sab hauv cov nthwv dej los ntawm cov khoom siv tsis tuaj yeem ua "ib zaug" desoldering, los yog ntev pins nyob rau hauv lub tin kub soaking lub sij hawm ntev heev. , flux nyob rau saum npoo ntawm tus pin yog scorched, fluidity ntawm solder ntawm tus pins ua tsis zoo, uas ua rau muaj peev xwm ntawm kev tsim ntawm tus choj.
7. PCB board clamping taug kev ceev, nyob rau hauv cov txheej txheem soldering, taug kev ceev yuav tsum tau kho kom deb li deb raws li tau raws li cov kev cai ntawm lub sij hawm soldering, lub preheating kub yog teem kom tau raws li cov kev cai ntawm flux activation, ib yam ntawm cov saum toj no txuas yog tsis muaj kev sib koom tes (tsis tshua muaj kub, kub kub, tsis raug tin kub, tsis txaus lub sij hawm rau dip tin, thiab lwm yam.) yuav ua rau cov tsim ntawm kev sib txuas ntawm tus choj; ntawm qhov tod tes, qhov ceev ntawm kev sib txuam thiab cov txheeb ze txaus tus nqi ntawm cov solder yoj crest kuj muaj qee qhov txuas. Thaum lub PCB rau pem hauv ntej "force" thiab lub solder yoj crest rau pem hauv ntej inflow slot flow "force" tuaj yeem tshem tawm ib leeg, lub xeev no rau lub xeev solder, lub sij hawm no lub PCB nyob rau hauv lub solder tsim nyob rau hauv lub desoldering point rau lub "{{1 }} "point. Qhov xwm txheej no kuj muaj zog rau IC thiab cov khoom siv hauv chav kawm plug.
8. PCB board vuam lub kaum sab xis, theoretically ntau dua lub kaum sab xis, cov pob qij txha nyob rau hauv pem hauv ntej thiab nram qab ntawm lub solder pob qij txha tawm ntawm lub nthwv dej crest thaum muaj feem ntawm ib tug ntau nto, qhov me me yuav muaj feem ntawm bridging txawm. Txawm li cas los xij, lub kaum sab xis ntawm soldering yog txiav txim siab los ntawm cov yam ntxwv infiltration ntawm lub solder nws tus kheej. Feem ntau hais lus, lub kaum sab xis ntawm cov hlau lead yog kho tau ntawm 4 degree thiab 9 degree raws li PCB pawg thawj coj tsim, thiab cov hlau lead-dawb soldering yog adjustable ntawm 4 degree thiab 6 degree raws li tus neeg siv khoom PCB board tsim. Yuav tsum tau xyuam xim rau lub kaum sab xis loj ntawm cov txheej txheem vuam, pem hauv ntej kawg ntawm PCB dip tin yuav tshwm sim noj tin rau hauv qhov tsis muaj tin ntawm qhov xwm txheej, uas yog tshwm sim los ntawm tshav kub ntawm PCB board mus rau nruab nrab concave, yog tias qhov xwm txheej zoo li no yuav tsum tsim nyog los txo qhov vuam lub kaum sab xis.
9. PCB tsim tsis zoo, qhov xwm txheej no feem ntau tshwm sim hauv cov khoom siv ntom ntom thaum cov ntaub qhwv lub ntsej muag tsis zoo tsim los yog cov ntsaws ruaj ruaj thiab IC cov khoom ntawm cov vuam tsis raug.
10. PCB board deformation, qhov teeb meem no yuav ua rau PCB sab laug nyob rau hauv txoj cai peb lub siab nthwv dej qhov tob inconsistency, thiab tshwm sim los ntawm kev noj tin tob qhov chaw tin flow tsis du, yooj yim los tsim bridging. PCB deformation yam yog kwv yees li hauv qab no.
(1) preheat lossis solder kub yog siab dhau.
(2) PCB board clamping nruj heev.
(3) hloov ceev yog qeeb heev, lub rooj tsavxwm PCB nyob rau hauv qhov kub thiab txias ntev heev.
