Kev piav qhia
Flux: Ib yam tshuaj uas tuaj yeem pab thiab txhawb txoj kev vuam, thiab muaj kev tiv thaiv thiab tiv thaiv oxidation. Flux tuaj yeem muab faib ua khoom, kua thiab roj. Nws feem ntau suav nrog "kev pab cuam hluav taws xob", "tshem tawm oxides", "txo qhov nro ntawm cov khoom siv tau welded", "tshem cov roj stains ntawm cov khoom siv welded, ua rau thaj tsam vuam", thiab "tiv thaiv reoxidation". . Ntawm cov no, ob lub luag haujlwm tseem ceeb tshaj plaws yog: "tshem tawm oxides" thiab "txo qhov nro ntawm cov khoom siv welded".
Kev xaiv ntawm flux Lub luag haujlwm ntawm flux yog txhawm rau txhim kho vuam kev ua tau zoo thiab txhim kho vuam firmness. Flux tuaj yeem tshem tawm oxides ntawm cov hlau saum npoo thiab tiv thaiv nws los ntawm kev txuas ntxiv mus rau oxidize, txhim khu kev ua haujlwm ntawm cov hlau thiab hlau nto, yog li ua kom muaj peev xwm ntub dej thiab adhesion.
Flux muaj zog acid flux, qaug zog acid flux, nruab nrab flux thiab lwm yam. Feem ntau siv cov fluxes rau cov neeg siv hluav taws xob muaj xws li rosin, rosin tov, solder paste thiab solder oil, thiab lwm yam. Lawv muaj ntau yam muaj nyob rau hauv lub rooj, thiab lawv muaj peev xwm xaiv tau raws li cov khoom sib txawv. Solder paste thiab solder roj yog corrosive thiab tsis tuaj yeem siv los ua cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob. Tom qab soldering, cov residual solder paste thiab solder roj yuav tsum tau muab so kom huv si. Rosin yuav tsum tau siv ua flux thaum tinning cov pins ntawm cov khoom. Yog tias cov ntawv luam tawm Circuit Board tau coated nrog cov tshuaj rosin, tsis tas yuav muaj qhov flux thaum soldering cov khoom.
Rau cov tuam ntxhab, tsis muaj txoj hauv kev los ntsuas qhov muaj pes tsawg leeg ntawm cov flux. Yog tias koj xav paub seb cov kuab tshuaj flux yog volatilized, koj tuaj yeem ntsuas qhov tshwj xeeb lub ntiajteb txawj nqus. Yog tias qhov tshwj xeeb lub ntiajteb txawj nqus nce ntau, nws tuaj yeem xaus lus tias qhov hnyav tau volatilized.
Thaum xaiv flux, muaj cov lus qhia hauv qab no rau cov tuam ntxhab:
Ua ntej, hnov cov ntxhiab tsw ua ntej txiav txim siab seb hom kuab tshuaj twg yog siv. Piv txwv li, methanol muaj ib tug me me tsis hnov tsw tab sis yog chob heev, isopropyl cawv muaj ib tug hnyav tsw, thiab ethanol muaj ib tug mellow tsw. Txawm hais tias tus neeg muag khoom kuj tseem tuaj yeem siv cov kuab tshuaj sib xyaw, yog tias tus neeg muag khoom raug nug kom muab cov ntaub ntawv qhia muaj pes tsawg leeg, lawv feem ntau yuav muab nws; Txawm li cas los xij, tus nqi ntawm isopropyl cawv yog li 3-4 npaug ntawm methanol. Yog tias tus nqi raug txo qis heev nrog tus neeg muag khoom, nws yuav nyuaj rau hais tias dab tsi yog sab hauv
Qhov thib ob, txiav txim siab tus qauv. Qhov no kuj yog txoj hauv kev tseem ceeb tshaj plaws rau ntau lub tuam txhab xaiv cov flux. Thaum lees paub tus qauv, tus neeg muag khoom yuav tsum tau hais kom muab cov ntaub ntawv qhia txog qhov cuam tshuam thiab sib piv nrog cov qauv. Yog tias tus qauv raug lees paub OK, qhov kev xa khoom tom ntej yuav tsum tau muab piv nrog cov qauv qub. Thaum muaj qhov txawv txav, qhov tshwj xeeb lub ntiajteb txawj nqus, tus nqi acidity, thiab lwm yam yuav tsum tau kuaj xyuas. Tus nqi ntawm cov pa luam yeeb tsim los ntawm cov flux kuj yog ib qho tseem ceeb heev qhia.
Thib peb, kev lag luam flux yog sib xyaw. Thaum xaiv, koj yuav tsum muaj kev nkag siab meej txog qhov tsim nyog ntawm tus neeg muag khoom. Yog tias tsim nyog, koj tuaj yeem mus rau cov chaw tsim khoom kom pom lub Hoobkas. Yog tias nws yog cov chaw tsim khoom flux tsis raug cai, nws ntshai heev ntawm cov txheej txheem no. Yuav siv cov flux li cas Ua ntej qhia txog txoj kev siv, cia peb tham txog kev faib tawm ntawm flux. Nws tuaj yeem muab faib ua cov tsis-polar flux. Qhov muag ntawm lub khw yog hu ua "solder oil". Nco ntsoov ntxuav nws tom qab siv, txwv tsis pub nws yooj yim rau corrode thiab ua rau cov khoom welded puas.
Lwm hom yog cov organic series flux, uas tuaj yeem decompose sai thiab tawm hauv qhov tsis muaj zog. Lwm hom yog resin active series flux. Hom flux no tsis yog-corrosive, zoo heev insulating thiab muaj lub sij hawm ntev stability. Qhov feem ntau siv ib qho yog ntxiv ib qho activator rau rosin flux.
Feem ntau hais lus, txoj kev siv aluminium flux yog qhov yooj yim. Ua ntej, so cawv rau ntawm qhov vuam kom tshem tawm cov roj stains, thiab tom qab ntawd koj tuaj yeem siv cov flux rau saum npoo kom welded, thiab tom qab ntawd koj tuaj yeem welded. Tab sis koj yuav tsum nco ntsoov ntxuav nws tom qab vuam, thiab xyuam xim rau kev nyab xeeb thaum siv, thiab tsis txhob cia nws nkag mus rau hauv lub qhov ncauj, qhov ntswg, caj pas thiab tiv thaiv daim tawv nqaij. Thaum tsis siv, cia li kaw nws thiab muab tso rau hauv qhov chaw txias thiab qhov cua.
Tus yuam sij rau kev sib txuas nrog cov tin tuav yog los ntxuav qhov chaw soldering, cua sov thiab yaj cov rosin rau ntawm qhov chaw soldering los yog siv cov flux ntawm cov khoom yuav tsum tau soldered, thiab tom qab ntawd siv cov hlau soldering rau tin nws thiab taw tes rau ntawm qhov taw tes. yuav tsum tau soldered. Feem ntau, rosin yog siv los ua cov khoom me me, thiab cov flux yog siv los ua cov khoom loj. Rosin yog siv rau hauv Circuit Court boards, thiab flux yog siv rau ib leeg-thooj soldering.
Cov lus qhia:
1. Lub neej txee lub neej yog ib nrab xyoo. Thov tsis txhob khov cov khoom. Qhov zoo tshaj plaws cia kub: 18 ℃ -25 ℃, qhov zoo tshaj plaws cia av noo: 75% -85%.
2. Tom qab cov flux khaws cia rau lub sijhawm ntev, nws qhov tshwj xeeb lub ntiajteb txawj nqus yuav tsum tau ntsuas ua ntej siv, thiab lub ntiajteb txawj nqus tshwj xeeb yuav tsum tau kho kom zoo li qub los ntawm kev ntxiv diluent.
3. Cov kuab tshuaj flux yog cov khoom siv tshuaj tua hluav taws. Nws yuav tsum tau ua nyob rau hauv ib qho chaw zoo-ventilated, kom deb ntawm hluav taws, thiab tsis txhob raug tshav ntuj ncaj qha.
4. Thaum siv cov flux hauv lub tank kaw, ua tib zoo saib xyuas qhov tsim nyog kho cov tshuaj tsuag ntim thiab txau siab raws li qhov ua tau zoo ntawm lub nthwv dej crest thiab cov yam ntxwv ntawm cov khoom.
5. Thaum cov flux txuas ntxiv mus rau hauv lub tank kaw, ib qho me me ntawm cov khib nyiab yuav ntim rau hauv qab ntawm lub tank kaw. Lub sijhawm ntev dua, cov sediment ntau yuav sib sau ua ke, uas tuaj yeem ua rau cov tshuaj tsuag ntawm cov nthwv dej crest rauv thaiv. Txhawm rau tiv thaiv cov khib nyiab los ntawm kev thaiv cov tshuaj tsuag ntawm yoj crest rauv, cuam tshuam rau cov tshuaj tsuag ntim thiab cov tshuaj tsuag thiab ua rau muaj teeb meem PCB soldering, nws yog ib qho tsim nyog yuav tsum tsis tu ncua tu thiab tswj cov tshuaj tsuag xws li lub tank kaw thiab lim. Nws raug nquahu kom ua nws ib zaug ib lub lim tiam thiab hloov cov flux nrog sediment nyob rau hauv qab ntawm lub tank kaw.
Rau kev siv phau ntawv soldering:
1. Sim tsis txhob nchuav ntau dhau ntawm ib zaug, ntxiv thiab ntxiv raws li qhov ntau lawm;
2. Ntxiv 1/4 diluent txhua 1 teev, thiab ntxiv qhov tsim nyog ntawm flux txhua 2 teev;
3. Ua ntej noj su thiab yav tsaus ntuj so lossis thaum nres siv, sim kaw cov flux;
4. Ua ntej tawm mus ua haujlwm thaum hmo ntuj, ua tib zoo ncuav cov dej hauv lub tais rov qab rau hauv lub thoob thiab ntxuav lub tais nrog ib daim ntaub huv si rau kev siv;
5. Thaum siv cov flux siv nag hmo, ntxiv 1/4 diluent thiab ntau dua ob zaug ntawm cov flux tshiab uas tsis tau siv, kom cov flux siv nag hmo tuaj yeem siv tag nrho kom tsis txhob pov tseg.
6. Thaum siv cov flux nrog cov tshuaj tsuag lossis cov txheej txheem foaming, thov tsis tu ncua xyuas cov cua siab ntawm cov cua compressor. Nws yog qhov zoo tshaj plaws los lim cov dej noo thiab cov roj hauv cov huab cua nrog ntau tshaj ob qhov kev tshuaj ntsuam xyuas qhov tseeb, thiab siv cov khoom qhuav, tsis muaj roj, thiab dej tsis muaj dej huv compressed cua kom tsis txhob cuam tshuam cov qauv thiab kev ua haujlwm ntawm cov flux.
7. Ua tib zoo saib xyuas qhov kev hloov ntawm cov tshuaj tsuag thaum txau, thiab xyuas kom meej tias cov flux sib npaug sib npaug ntawm PCB nto.
8. Lub tin yoj yog tiaj tus, PCB tsis deformed, thiab tuaj yeem tau txais cov nyhuv zoo dua qub.
9. Thaum lub tinned PCB yog oxidized hnyav, thov ua ntej kev kho mob kom zoo thiab solderability.
10. Cov flux uas tsis tau kaw yuav tsum muab kaw ua ntej cia. Tsis txhob nchuav cov kua dej siv rov qab rau hauv cov ntim khoom qub kom ntseeg tau qhov huv ntawm cov kua qub.
11. Cov khoom siv hluav taws xob yuav tsum tau ua los ntawm tus neeg mob siab rau thiab tsis tuaj yeem muab pov tseg raws li qhov xav tau kom ua paug ib puag ncig.
12. Thaum lub sijhawm ua haujlwm, lub rooj tsavxwm liab qab thiab cov ko taw ntawm cov khoom yuav tsum raug tiv thaiv kom tsis txhob muaj cov hws, tes stains, ntsej muag cream, roj lossis lwm yam khoom siv. Ua ntej vuam tiav thiab tsis qhuav tag, thov kom nws huv si thiab tsis txhob kis nrog koj txhais tes. 13. Tus nqi ntawm flux txheej yog nyob ntawm cov khoom yuav tsum tau ua. Qhov pom zoo ntawm flux rau ib leeg-sab boards yog 25-55ml / min, thiab cov lus pom zoo ntawm flux rau ob sab boards yog 35-65ml / min.
14. Thaum cov flux yog siv los ntawm cov txheej txheem foaming, nws yog ib qho tsim nyog yuav tsum tswj qhov tshwj xeeb lub ntiajteb txawj nqus ntawm cov flux los tiv thaiv cov qauv thiab kev ua haujlwm ntawm cov flux los ntawm kev cuam tshuam los ntawm volatilization ntawm cov kuab tshuaj nyob rau hauv cov flux, qhov nce ntawm lub ntiajteb txawj nqus, thiab nce ntawm flux concentration. Nws raug nquahu kom kuaj xyuas qhov tshwj xeeb lub ntiajteb txawj nqus ntawm cov flux tom qab li 2 teev ntawm foaming. Thaum qhov tshwj xeeb lub ntiajteb txawj nqus nce, ntxiv qhov tsim nyog tus nqi ntawm diluent los kho nws. Qhov kev pom zoo ntawm kev tswj lub ntiajteb txawj nqus yog ± 0.01 ntawm qhov tshwj xeeb lub ntiajteb txawj nqus ntawm cov kua dej tshwj xeeb. 15. Lub preheating kub ntawm lub flux, qhov pom zoo kub rau hauv qab ntawm ib leeg-sab board yog 75-105 ℃ (qhov pom zoo kub rau saum npoo ntawm ib sab board yog 60-90 ℃), thiab pom zoo kub rau hauv qab ntawm lub rooj tsavxwm ob sab yog 85-120 ℃ (qhov pom zoo kub rau saum npoo ntawm lub rooj tsavxwm ob sab yog 70-95 ℃).
16. Rau lwm yam kev ceev faj, thov mus saib Cov Khoom Siv Kev Nyab Xeeb Specification Sheet (MSDS) muab los ntawm peb lub tuam txhab.
Xinfa vuam cov cuab yeej muaj cov yam ntxwv zoo thiab tus nqi qis. Yog xav paub ntxiv, thov mus saib:Vuam & txiav Manufacturers - Tuam Tshoj Vuam & Txiav Hoobkas & lwm tus neeg (xinfatools.com)
Post lub sij hawm: Aug-29-2024
