Hauv thaj teb ntawmua pcb, cov txheej txheem kho saum npoo yog qhov tseem ceeb rau kev ua kom cov hluav taws xob ua tau zoo, kev ntseeg tau ntawm cov khoom siv hluav taws xob, thiab kev ua tiav ntawm cov rooj sib tham hauv Circuit Court. Ntawm lawv, pcb tin spraying tshuab tau dhau los ua ib qho ntawm cov cuab yeej siv dav siv vim nws cov khoom zoo heev, oxidation tsis kam, thiab tus nqi qis.
1, Lub hauv paus ntsiab lus thiab cov txiaj ntsig tseem ceeb ntawm cov txheej txheem tin spraying
(1) Kev Tshawb Fawb Txog Txheej Txheem Txheej Txheem
pcb tin spraying txheej txheem, tseem hu ua cua kub leveling, yog ib tug txheej txheem ntawm immersing ib tug tiav pcb mus rau hauv ib tug molten tin lead los yog lead- dawb tin alloy solder da dej kom tusyees npog lub nto thiab lub qhov phab ntsa ntawm lub Circuit Court board nrog ib tug txheej ntawm solder. Tom qab ntawd, cov khoom siv ntau dhau raug tshuab los ntawm kev siv siab - cua kub ceev los ua ib qho chaw tiaj tus, zoo ib yam, thiab cov txheej txheej zoo heev. Cov txheej txheem no suav nrog peb cov kauj ruam tseem ceeb: solder infiltration, adhesion, thiab cua kub leveling, uas yuav tsum tau tswj qhov kub thiab txias, lub sij hawm, thiab huab cua kub tsis zoo los xyuas kom meej txheej zoo.
(2) Cov khoom siv thev naus laus zis tseem ceeb
Zoo heev Solderability: Cov tshuaj tsuag tin txheej tuaj yeem cais cov tooj liab saum npoo ntawm huab cua, tiv thaiv oxidation, muab qhov zoo tshaj plaws welding nto rau cov txheej txheem vuam tom ntej, thiab txo qhov kev pheej hmoo ntawm kev vuam virtual thiab txias vuam.
Tus nqi zoo tshaj -kev ua tau zoo: Piv nrog cov txheej txheem xws li tshuaj lom neeg deposition ntawm kub thiab electroplating ntawm npib tsib xee thiab kub, tin spraying txheej txheem muaj qis dua cov cuab yeej peev, cov txheej txheem yooj yim ntws, tswj cov nqi raw khoom, thiab yog tsim rau loj - teev ntau lawm.
Kev sib raug zoo: Haum rau ntau hom pcb boards thiab tsim, tshwj xeeb tshaj yog ruaj khov nyob rau hauv kev kho deg ntawm ntau- txheej boards thiab aperture ntom boards, tuaj yeem ua tau zoo los ntawm qhov, thiab ua kom muaj kev sib txuas hluav taws xob.
2, Cov lus piav qhia ntxaws txog cov txheej txheem tin spraying ntws
(1) Cov txheej txheem ua ntej
Kev tshem tawm cov roj thiab ntxuav: Siv cov tshuaj ntxuav alkaline kom tshem tawm cov roj stains, cov ntiv tes, thiab lwm yam khoom muaj kuab paug los ntawm pcb nto, kom ntseeg tau tias cov tooj liab saum npoo yog huv si thiab tsis muaj impurities, thiab txhim kho cov nplaum nplaum.
Micro etching roughening: Los ntawm kev siv acidic etching tov rau me ntsis etch ntawm tooj liab nto, ib tug micro ntxhib qauv tsim, uas ua rau kom qhov chaw sib cuag ntawm lub solder thiab tooj liab nto thiab txhim khu cov nyhuv wetting.
Kev kho kom ua haujlwm: Siv hydrochloric acid lossis lwm yam activators tshem tawm cov oxide zaj duab xis ntawm cov tooj liab, ua kom cov tooj liab nyob rau hauv lub xeev nquag thiab tsim cov kev mob rau solder infiltration.
(2) Lub luag haujlwm tseem ceeb ntawm tin spraying
Solder da dej immersion: Dip lub pre kho pcb rau hauv lub molten solder da dej tuav ntawm qhov kub ntawm 245-265℃(feem ntau 260-275℃rau cov txheej txheem tsis muaj txhuas), nrog rau lub sij hawm nyob rau hauv lub sij hawm tswj ntawm 3-5 vib nas this, los xyuas kom meej tias lub solder tag nrho npog cov phab ntsa ntawm lub rooj tsavxwm.
Cua kub theem: Tom qab tshem lub pcb ntawm lub tank solder, tam sim ntawd siv lub siab - cua kub ceev riam (nrog cua ceev ntawm li 60-80m / s) kom tshuab ntau tshaj solder. Qhov kub ntawm cov cua kub yuav tsum sib haum rau qhov kub ntawm lub tank solder kom ntseeg tau tias lub solder nyob rau hauv lub molten lub xeev thiab ua tiav nto leveling.
(3) Tom qab ua tiav theem
Kev ntxuav dej thiab ziab: Yaug cov dej ntws thiab cov impurities nyob rau saum npoo ntawm pcb nrog dej huv los tiv thaiv corrosion ntawm Circuit Board. Tom qab ntawd, tshem tawm cov dej noo los ntawm cua kub los yog lub tshuab nqus tsev kom qhuav kom tsis txhob muaj dej stains.
Kev soj ntsuam zoo: Kev tshuaj xyuas qhov muag pom, kev soj ntsuam ntawm lub tshuab ntsuas metallographic thiab lwm txoj hauv kev yog siv los xyuas cov thickness, uniformity, deg flatness thiab seb puas muaj qhov tsis xws luag xws li bridging thiab voids hauv tin spray txheej, kom ua raws li cov txheej txheem txheej txheem.
3, Qhov tseem ceeb parameter tswj ntawm tin spraying txheej txheem
(1) Kev ntsuas kub
Solder tank kub: Qhov kub ntau dhau tuaj yeem ua rau muaj zog oxidation ntawm solder thiab deformation ntawm pcb substrate; Yog hais tias qhov kub thiab txias yog tsawg, qhov flowability ntawm solder yuav tsis zoo, uas yuav cuam tshuam rau cov nyhuv wetting. Yuav tsum tau kho kom raug raws li qhov muaj pes tsawg leeg ntawm cov hlau alloy, thiab cov hlau lead- cov txheej txheem pub dawb muaj kev tswj xyuas qhov kub thiab txias.
Cov cua kub kub: Cov cua kub kub ncaj qha cuam tshuam rau cov nyhuv qib ntawm cov solder. Yog tias qhov kub thiab txias dhau lawm, lub solder tuaj yeem txaws, thiab yog tias nws qis dhau, cov khoom siv ntau dhau tsis tuaj yeem tshem tawm tau zoo. Nws yuav tsum tau kho nyob rau hauv ua ke nrog lub solder tank kub.
(2) Lub sij hawm parameter
Tin immersion lub sij hawm: Lub sij hawm luv luv ntawm tin immersion tuaj yeem ua rau cov khoom siv tsis txaus, thaum lub sij hawm ntev heev yuav ua rau cov cua sov ntau dhau ntawm pcb, ua rau warping thiab deformation. Lub sij hawm yuav tsum tau optimized raws li tej yam xws li board thickness thiab aperture loj.
Lub sij hawm cua kub theem: xyuas kom meej tias lub sij hawm ua cua kub yog txaus los tshem tawm cov solder tshaj, tab sis nws yuav tsum tsis txhob ntev dhau, thiaj li tsis ua kom tiav cov nyhuv leveling tom qab lub solder txias thiab solidifies.
(3) Lwm yam txheej txheem tsis
Solder muaj pes tsawg leeg: Feem ntau cov tin txhuas alloys (xws li Sn63Pb37) thiab cov hlau lead-dawb alloys (xws li Sn96.5Ag3.0Cu0.5) muaj qhov sib txawv ntawm cov ntsiab lus melting, flowability, oxidation kuj, thiab lwm yam, thiab tsim nyog solder yuav tsum tau xaiv raws li cov khoom xav tau.
Flux kev ua tau zoo: Kev ua haujlwm, kev ntub dej, thiab cov yam ntxwv ntawm cov dej ntws tawm cuam tshuam rau cov nyhuv ntub dej ntawm cov solder thiab qhov nyuaj ntawm kev tu tom ntej. Nws yog ib qho tsim nyog los xaiv ib hom flux tsim nyog.
4, Feem ntau cov teeb meem thiab kev daws teeb meem hauv tin txau txheej txheem
(1) Nto unevenness
Ua rau kev tsom xam: huab cua kub tsis sib xws, kev tswj qhov kub tsis zoo, thiab cov impurities ntau dhau ntawm lub tank solder tuaj yeem ua rau tsis sib xws ntawm cov txheej txheej txheej txheej, uas ua rau muaj qhov tsis xws luag xws li qhov tsis sib xws thiab tsis sib xws.
Kev daws: tsis tu ncua ntxuav lub tank solder, calibrate lub kaum sab xis thiab cua ceev ntawm cov cua kub riam, optimize qhov kub thiab txias nkhaus, thiab xyuas kom meej tias cov cua kub yog sib npaug zos rau cov pcb nto.
(2) Lub qhov thaiv hauv lub qhov
Ua rau kev tsom xam: Lub sij hawm ntev tin immersion, kub solder kub, los yog tsis txaus ua hauj lwm flux yuav ua rau solder mus rau hauv lub qhov, ua rau lub qhov blockage.
Kev daws: Txo lub sij hawm immersion, txo qhov kub ntawm solder, siv ntau active soldering flux, thiab ntxiv los ntawm -lub qhov auxiliary exhaust qauv nyob rau hauv tus txheej txheem tsim.
(3) Tin hlaws residue
Ua rau kev tsom xam: Cov huab cua kub ntau dhau, tsis huv pcb nto, los yog tsis sib xws flux spraying tau yooj yim ua rau solder rau txaws thiab tsim cov hlaws hlaws residue.
Kev daws: Kho cov cua kub tsis muaj zog, ntxiv dag zog rau kev ua ntej- kho cov txheej txheem ntxuav, ua kom zoo dua cov txheej txheem txau dej, thiab xyuas kom muaj kev tiv thaiv zoo ib yam.
5, Kev lag luam daim ntawv thov thiab kev loj hlob sib txawv ntawm tin spraying txheej txheem
(1) Kev siv dav dav
Cov khoom siv hluav taws xob siv hluav taws xob: Hauv cov khoom xws li xov tooj ntawm tes, khoos phis tawj, thiab cov tsev ntse, tin spraying thev naus laus zis kom ntseeg tau tias tsawg - nqi thiab kev ntseeg siab ntawm cov laug cam, ua tau raws li cov kev xav tau ntawm cov khoom loj -.
Cov khoom siv sib txuas lus: Tsim nyog rau pcb kev tsim khoom ntawm cov khoom siv sib txuas lus xws li cov chaw nres tsheb hauv paus thiab routers, ua kom muaj kev ruaj ntseg ntawm cov teeb liab kis tau tus mob thiab kev ntseeg siab ntawm kev sib txuas hluav taws xob.
Kev tswj hwm kev lag luam: Hauv cov cuab yeej siv tshuab hluav taws xob thiab hluav taws xob tswj cov boards, tin spraying technology adapts rau complex ua hauj lwm ib puag ncig nrog zoo corrosion kuj thiab mechanical zog.