Printed circuit boards yog lub hauv paus tsim, yam tsis muaj ib lub xov tooj cua lossis cov khoom siv hluav taws xob hauv microprocessor tuaj yeem ua tau niaj hnub no. Kev tsim khoom ntawm lub hauv paus no suav nrog kev siv cov khoom siv tshwj xeeb, nrog rau cov thev naus laus zis rau kev tsim cov qauv ntawm cov cab kuj phaj. Wave soldering yog ib txoj hauv kev zoo tshaj plaws ntawm cov txheej txheem molding rau cov ntawv luam tawm Circuit Board.
Kev npaj
Thawj theem, thaum lub sijhawm ob txoj haujlwm raug daws - kev xaiv ntawm cov khoom siv hauv paus thiab cov npe ntawm cov khoom siv tsim nyog rau kev ua haujlwm, nrog rau cov cuab yeej teeb tsa. Raws li ib feem ntawm thawj txoj hauj lwm, tshwj xeeb, lub hauv paus rau lub rooj tsavxwm yog npaj, nws qhov ntev yog tsau, thiab cov contours ntawm soldered.kev sib txuas. Ntawm cov khoom siv, yoj soldering yuav tsum tau ntxiv cov neeg ua haujlwm tshwj xeeb kom txo qis kev tsim oxide yav tom ntej. Tsis tas li ntawd, kev hloov kho ntawm cov khoom siv ntawm cov qauv kuj tuaj yeem siv tau yog tias nws tau npaj los siv rau hauv ib puag ncig hnyav.
Cov cuab yeej siv rau kev ua haujlwm no feem ntau yog lub tshuab compact tab sis multifunctional. Lub peev xwm ntawm lub tshuab yoj ib txwm siv tau yog tsim los ua haujlwm ib txheej lossis ntau txheej boards nrog kev ua haujlwm ntawm li 200 mm dav. Raws li rau kev kho ntawm chav tsev no, ua ntej ntawm tag nrho cov, cov yam ntxwv dynamic thiab waveform yog teem. Qhov tseem ceeb ntawm cov kev txwv no yog tswj hwm los ntawm yoj lub taub hau, tshwj xeeb, tso cai rau koj los teeb tsa cov ntawv ntws ntawm Z- thiab T-puab. Raws li qhov yuav tsum tau muaj rau cov ntawv luam tawm, cov ntsuas ceev nrog cov kev taw qhia ntawm nthwv dej kuj raug muab.
workpiece fluxing
Raws li hauv cov txheej txheem vuam, thaum ua cov vuam, cov flux ua lub luag haujlwm ntawm lub tshuab ntxhua khaub ncaws thiab lub stimulator rau kev tsim cov kev sib koom tes zoo. Hmoov thiab kua fluxes siv, tab sis nyob rau hauv ob qho tib si lawv lub luag haujlwm tseem ceeb yog los tiv thaiv cov txheej txheem hlau oxidation ua ntej cov tshuaj tiv thaiv soldering pib, txwv tsis pub cov solder yuav tsis sib koom ua ke. Cov kua flux yog siv los ntawm ib tug sprayer los yog ib tug foaming neeg sawv cev. Thaum lub sij hawm tso, qhov sib tov yuav tsum tau diluted nrog cov tsim nyog activators, rosin thiab me acids, uas yuav txhim kho cov tshuaj tiv thaiv. Ua npuas ncauj tov yog siv nrogsiv cov lim tubular uas tsim cov npuas zoo. Nyob rau hauv tus txheej txheem ntawm metalized yoj soldering, xws li coatings txhim kho wetting thiab txhawb kev txiav txim ntawm modifiers. Feem ntau, ob qho tib si ua kua thiab cov khoom fluxes koom nrog cais tawm los yog tshem tawm cov khoom siv ntau dhau. Tab sis kuj tseem muaj ib pawg ntawm indelible active tshuaj uas muaj tag nrho nyob rau hauv cov qauv ntawm cov khoom desoldering thiab tsis tas yuav muaj ib tug stripping yav tom ntej.
Preheat
Nyob rau theem no, lub rooj tsav xwm luam tawm tau npaj rau kev sib cuag ncaj qha nrog cov solder. Kev ua haujlwm cua sov yog txo kom txo cov thermal shock thiab tshem tawm cov kuab lom thiab lwm yam khoom tsis tsim nyog uas nyob twj ywm tom qab fluxing. Cov cuab yeej siv rau kev ua haujlwm no yog suav nrog hauv cov txheej txheem ntawm yoj soldering installation thiab yog ib qho convection, infrared lossis quartz rhaub. Tus neeg teb xov tooj tsuas yog yuav tsum tau teeb tsa qhov kub thiab txias. Yog li, yog tias kev ua haujlwm tau ua tiav nrog lub rooj tsavxwm ib-txheej, tom qab ntawd cov cua kub tuaj yeem sib txawv li ntawm 80 - 90 ° C, thiab yog tias peb tham txog ntau txheej (los ntawm plaub theem) blanks, ces cov nyhuv thermal tuaj yeem ua tau. nyob rau hauv 110-130 ° C. Nrog ntau tus plated los ntawm qhov, tshwj xeeb tshaj yog thaum ua hauj lwm nrog multilayer boards, tag nrho cov cua sov yuav tsum tau ua kom ntseeg tau ntawm qhov kub thiab txias nce mus txog 2 ° C / s.
Kev ua lag luam
Kub hom thaum lub sij hawm soldering yog teem rau hauv thaj tsam ntawm 240mus txog 260 ° C ntawm qhov nruab nrab. Nws yog ib qho tseem ceeb uas yuav tsum tau soj ntsuam qhov zoo ntawm cov thermal raug rau ib qho kev ua haujlwm, vim tias qhov qis qis tuaj yeem ua rau cov neeg tsis muaj kev sib tw, thiab ntau dhau tuaj yeem ua rau cov txheej txheem deformation ntawm cov txheej txheem ua haujlwm. Lub sij hawm ntawm kev sib cuag nws tus kheej kav li ntawm 2 mus rau 4 vib nas this, thiab qhov siab ntawm lub solder thaum lub sij hawm yoj soldering yog xam nyob rau hauv tus kheej lub neej, coj mus rau hauv tus account lub thickness ntawm lub rooj tsavxwm. Piv txwv li, rau ib txheej txheej, lub solder yuav tsum npog li ntawm 1/3 ntawm lub thickness ntawm cov qauv. Nyob rau hauv cov ntaub ntawv ntawm multilayer workpieces, lub immersion qhov tob yog 3/4 ntawm lub board thickness. Cov txheej txheem yog siv raws li nram no: nrog kev pab los ntawm ib tug soldering tshuab compressor, ib tug yoj ntws yog tsim nyob rau hauv ib da dej nrog molten solder, nrog rau lub rooj tsavxwm nrog cov ntsiab lus tso rau ntawm nws txav. Thaum lub sij hawm ntawm kev sib cuag ntawm lub hauv qab ntawm lub rooj tsavxwm nrog solder, solder pob qij txha yog tsim. Qee qhov kev hloov kho ntawm kev teeb tsa muab lub peev xwm los hloov qhov inclination ntawm cov cab kuj conveyor tsis pub dhau 5-9 °, uas tso cai rau koj xaiv lub kaum sab xis rau qhov ntws ntawm solder.
Cov tub yees txias
Nws tsis yog qhov tsim nyog los siv txoj kev tshwj xeeb rau kev txias txias. Ntxiv mus, ntuj txias yog qhov tseem ceeb dua nyob rau hauv cov nqe lus ntawm kev tau txais ib tug zoo li lub xeev ntawm lub workpiece. Lwm qhov yog tias tom qab ua tiav ntawm yoj soldering, yuav tsum zam kev ntxhov siab ntawm thermomechanical, uas tuaj yeem tshwm sim los ntawm qhov sib txawv ntawm cov kab nthuav dav ntawm cov khoom ntawm cov txheej txheem rhuab thiab cov khoom tseem ceeb ntawm lub rooj tsavxwm.
Zaj lus
Wave methodthermal soldering yog tus cwj pwm los ntawm ntau qhov zoo los ntawm kev txo qis kev pheej hmoo ntawm cov txheej txheem deformation mus rau tus nqi qis ntawm kev ua haujlwm. Los ntawm txoj kev, txhawm rau ua cov txheej txheem nyob rau hauv ib lub voj voog tag nrho, cov nqi tsim nyog ua haujlwm tsawg tsawg yuav tsum tau muab piv rau lwm txoj hauv kev. Nyob rau tib lub sijhawm, kev nce qib tsis nyob twj ywm thiab ntau yam kev hloov kho ntawm cov thev naus laus zis tau tshwm sim niaj hnub no. Hauv particular, ob chav yoj soldering tso cai rau segmentation ntawm cov dej ntws, txhim kho cov pob qij txha ntawm qhov chaw sib cuag. Lub nthwv dej thib ob tau txais txiaj ntsig nrog kev tu tshwj xeeb, nyob rau hauv uas cov dej ntws ntau dhau thiab cov txuas txuas txuas tau zoo dua tshem tawm. Ntawm chav kawm, nyob rau hauv cov ntaub ntawv no, lub complexity ntawm cov cuab yeej yog tsis tiav. Cov chav ua tiav nrog cov twj tso kua mis, lub taub hau thiab cov tswj kav rau txhua qhov sib cais.
