Flux: cov khoom no yog siv hauv vuam dab tsi?

ntws

Yog tias koj tab tom kawm paub yuav ua li cas micro-weld Hluav taws xob Cheebtsam, los yog rov ua dua tshiab, koj tau qhia tias koj xav tau ib qho muab tshuaj hu ua fluxCov. Cov khoom no yog cov neeg ua tiav nrog ntau rau ntau tus, txij li cov niaj zaus soldering nrog tin cov ntsiab lus no feem ntau tsis siv, ntawm qhov tod tes, rau lwm cov solders nws yog kev pab zoo.

Hauv no coj koj tuaj yeem kawm txhua yam koj xav paub hais txog cov ntawv qhia no, xws li nws muaj pes tsawg leeg, lub hom phiaj, yuav siv nws li cas, hom, thiab lwm yam.

Dab tsi yog flux?

Hmoob lo lus flux tuaj yeem txhais ua flux, thiab los ntawm Latin «fluxus» uas txhais tau tias «ntws». Nws tsis yog tsuas yog siv hauv soldering rau cov khoom siv hluav taws xob, nws kuj yog siv ntau lwm hom soldering ua tus ntws los yog tus ua kom huv, zoo li hauv cov khoom lag luam hlau hauv kev lag luam hlau, uas yog, lawv feem ntau muaj ntau dua ib txoj haujlwm.

Thawj fluxes lawv tau ua nrog txiv qaub, potash, sodium carbonate, borax, txhuas sulfate, coke, thiab lwm yam. Txhua tus ntawm lawv siv hauv cov hauv paus txhawm rau txhawm rau txhuam cov hlau. Ntawm qhov tod tes, los ua tus neeg saib xyuas kev huv lossis los pab txhawb lub ntsej muag muag hluav taws xob, ua kom muaj qhov ua kom zoo dua qub thiab tshem tawm cov oxidation, nws yuav pib siv tom qab.

Tsom ntsoov rau tus kws txuas hlau, uas yog qhov kev kawm uas txaus siab rau peb ntawm no, nws yog qhov pib ib qho khoom (muab tshuaj, kua lossis hmoov) uas tuaj yeem tiv thaiv qhov xeb ntawm cov pob qij txha, ua raws li kev rwb thaiv tsev los ntawm kev sib cuag ntawm huab cua thaum lub fusion tshwm sim. Rau qhov no, cov tshuaj sib tov xws li tshuaj fluoride, borates, borax lossis boric acid yog siv.

Ntxiv nrog rau qhov kev tiv thaiv no, hauv tin solders, nws kuj ua haujlwm ua tus cov txheej txheem yooj yim dua, txais cov hlau thiab ua rau nws tswj tau zoo, thaum ua cov khoom ua raws li cov khoom zoo. Thiab, ntawm chav kawm, nws txhim kho qhov zoo ntawm vuam, zam qhov av thiab khib nyiab uas tsim thaum ua.

Lwm cov nyhuv ntawm cov flux no yog qhov haum rau qis dua qhov ntsuas kubCov. Qhov no txo ​​qhov teeb meem qhov tshwm sim ntawm kev puas tsuaj rau qhov sib dhos ua ke nrog qhov kub tau tsim tawm thaum tab tom ua.

Flux ntawv

Nyob rau hauv cov nqe lus ntawm daim ntawv thov flux, feem ntau siv ntau hauv cov lus nrog cov khoom hluav taws xob zoo li:

  • Kho micro-welds, qhov twg nws yog qhov nyuaj ntxiv rau kev ua raws li vim qhov me me me ntawm kev txuas.
  • SMD soldering ntawm PCBs.
  • Reballing rau BGA.
  • Kev ntxuav ntawm qhov seem lossis xeb ntawm cov seem.

Hom ntawm flux

Muaj ntau ntau hom flux nyob rau hauv kev ua lag luam rau vuam, txhua tus nrog cov nqi sib txawv thiab cov yam ntxwv.

  • Ammonium bromide tsis muaj hnyav hlau: nws yog cov kua aqueous ntawm organic ammonium bromides nrog dawb hydrobromic acid. Lawv feem ntau tsis tso tawm ib txoj lw seem ntawm qhov txuas, thiab yog tias lawv ua, nws tsis ua rau qhov tsim ntawm qhov (pitting).
  • Zinc chloride: lwm cov kua aqueous ntawm ammonium chloride thiab zinc chloride tov nrog dawb hydrochloric acid. Nws sawv tawm rau nws txoj kev yooj yim ntawm kev siv thiab ua tau zoo, txawm hais tias tshem tawm cov seem cuam tshuam kev tu nws kom tsis txhob muaj qhov tsim (pitting).
  • Zinc bromide: lwm hom kua dej ntawm zinc bromide thiab ammonium bromide nrog dawb hydrochloric acid. Zoo li yav dhau los dhau los, nws yooj yim siv, tab sis nws kuj tseem yooj yim kom tshem tawm cov seem los ntawm ntxuav nws nrog dej. Txawm hais tias cov seem nyob hauv ham, nws yuav tsis ua qhov.
  • Tsev: Txawm hais tias tsis pom zoo, qee cov neeg tsim khoom siv sim tsim lawv tus kheej flux hauv tsev. Ua li no, lawv siv me ntsis suab uas lawv tsoo thiab tov nrog cawv. Txawm li cas los xij, hom flux no yuav tsis ua tiav cov txiaj ntsig ib yam li cov khoom lag luam.

Qhov sib txawv ntawm flux thiab ham muab tshuaj

Ib qho kev ua xyem xyav tsis tu ncua yog tias nws yog tib lub flux uas muab tshuaj txhuam los yog yog tias muaj qee qhov sib txawv. Qhov tseeb yog tias nws yog qhov nyuaj, thiab ntau zaus cov khoom lawv tus kheej tsis meej pem hauv lawv cov lus piav qhia, siv ob lo lus ua ib qho lus ua. Ib txhia ua kom sib txawv, thiab lees tias muaj tsuas sib txawv me ntsis:

  • ntws: tshuaj lom neeg cov ntawv thov rau cov ntawv hlau kom lawv cov cua sov ua kom sov thiab ua kom zoo dua qub ntawm qhov chaw weld, lossis tseem tsim nyog.
  • Looj mem muab tshuaj txhuam: siv rau kev vuam mus rau kev ua raws li kev ua raws li ntawm cov tawv hlau feem ntau nyuaj.

Tab sis, raws li kuv tawm tswv yim, rau cov laj thawj tswv yim, koj tuaj yeem coj nws raws li lus txhaisCov. Qhov tseeb, nyob hauv qee qhov chaw ib lo lus siv thiab lwm qhov. Tsuas yog nco ntsoov thaum koj yuav cov khoom lag luam uas nws tsis yog flux lossis muab tshuaj txhuam rau cov kav dej lossis rau lwm cov ntawv thov, thiab nws yog qhov tshwj xeeb rau cov khoom siv hluav taws xob ...

Yuav siv li cas flux

Siv cov flux, lossis flux, yog qhov yooj yim yog tias koj ua raws hauv cov kauj ruamCov. Los ntawm kev ua qhov no, koj tuaj yeem tau txais qhov khoom zoo. Ntxiv rau, koj yuav tsum siv ntau qhov kev tiv thaiv kev ceev faj, xws li siv nws hauv chav siv ua pa uas nws yog tshuaj uas muaj peev xwm ua kom muaj vapors, hnav tsom iav thiab looj ntsej muag, thiab looj hnab looj tes.

lub cov lus qhia siv cov flux rau vuam yog:

  1. Ntxuav txhua qhov av uas tuaj yeem nyob hauv chaw chaw vuam, yog tias muaj.
  2. Thov txheej nyias txheej ntawm flux rau thaj chaw lossis ua ob qho tib si. Nws tsis muaj nqi hais tias seem tau sau rau qhov twg lossis yuav muaj vuam. Tsis tas li, yog tias thaj chaw muaj qee qhov kub, yuav zoo dua.
  3. Tom qab ntawd lub vuam yuav tsum tau ua raws li nws ib txwm ua, nyob ntawm seb nws yog SMD vuam, rov ua dua, thiab lwm yam.
  4. Thaum kawg, ntxuav cov flux residue.

Hais txog qhov kawg kis, muaj a kev sib cav txog ntawm seb puas yuav ntxuavCov. Qhov tseeb, nws tsis yog tsuas yog qhov tsis txaus ntseeg rau cov hobbyists (lossis phau ntawv vuam), nws kuj yog kev ntseeg hauv kev lag luam (kev siv tshuab tsis siv neeg). Ntau lub tuam txhab tsis quav ntsej tom qab kev tsim khoom los ntawm tsis muaj cov cuab yeej siv rau nws thiab los ntawm kev cia siab rau qhov ua tau zoo ntawm cov tshuab siv los tsim cov pob qij txha nrog kev huv txaus.

Hloov chaw, qhov kev paub cuav no tsis muaj kev ruaj ntseg tuaj yeem ua rau tsis saib xyuas ntawm tus electrochemical kev sib kis tsim nyob rau hauv ib co Cheebtsam thiab hais tias thaj tsis tsim kev phem, txawm hais tias nws yuav xaus lub sij hawm ntev tsis ua hauj lwm.

Thaum nws tau siv lawm flux core cam hlau lossis flux, cov flux no feem ntau yog cov khoom siv nrog qhov dej khov siab dua li cov hlau uas nyob ib puag ncig nws. Nyob rau hauv hom welds, thaum lub hau ntawm tus kws txuas txuas ntawm lub xaim, qhov flux ua kua thiab kis dhau qhov haujlwm. Nyob rau hauv txoj kev no, hlau molten ua raws cov cua sov thiab nplaim taws, ua qhov sib txuas. Raws li tuaj yeem txiav tawm, vim tias nws yuav tsum muaj cua sov kom yaj, cov kev pheej hmoo ntawm kev sib kis muaj tsawg heev ...

Ntawm qhov tod tes, qhov no tsis yog nyob rau hauv lwm cov txheej txheem soldering qhov twg ntau dua flux hos vim yog cov yam ntxwv ntawm cov cam, piv txwv li hauv SMD. Txawm li cas los xij, muaj cov khoom lag luam “Tsis Huv” kua uas tsis tas yuav ntxuav, tab sis yuav tsum tau nphav raug tshav kub kom muaj kev tiv thaiv lawv.

Muaj ntau cov tshuaj yaug lossis ntxuav cov khoom, xws li cov kuab tshuaj xws li isopropyl cawv (IPA), nrog rau cov ntaub so, cov tawv nqaij, thiab lwm yam. Koj yuav tsum ua tib zoo nyeem flux cov chaw tsim khoom cov lus qhia rau kev siv thiab kev pom zoo los txiav txim qhov raug.

Piv txwv li, thaum ua qhov sib dhos tag nrho soldering, uas tau lees tias, tab sis tsis nyob hauv lwm cov kev siv qhov twg xaiv qhov taw tes-rau-point soldering lossis rov ua dua tshiab siv. Hauv cov xwm txheej no, cov cua kub hauv ib cheeb tsam tsis tuaj yeem ua kom txaus zom tej chiv ntawm cov tshuaj thiab ua rau nws inert. Thiab qhov ntawd yog teeb meem rau cov khoom seem tom qab lub chaw weld lossis kis hauv qab lossis dhau ntawm cov khoom sib txuas.

Yuav ua li cas cia flux

Thaum koj ua tiav siv cov flux, kom nws yog cai zoo koj yuav tsum:

  • Tso cov flux hauv nws lub raj mis qub thiab kaw nws kom zoo.
  • Lub thawv yuav tsum yog qhov feem ntsug, txwv tsis pub nws lub qhov siab.
  • Khaws rau hauv qhov chaw txias, qis dua ntsuas kub, zoo dua. Tso nws rau hauv qhov chaw qhuav lossis qhov kub siab yuav tsum zam txhua tus nqi.
  • Yog tias koj tau muab nws tso rau hauv qhov chaw ntawm qhov kub tsawg (5-6ºC) raws li qee cov tuam txhab qhia, ua ntej siv nws dua koj yuav tsum tso nws li 6 teev ntawm chav sov kom nws ncav qhov ntsuas kub zoo rau kev siv.

Qhov tsis zoo thiab qhov ceev faj rau kev siv flux

Fluxes lossis flux tsis yog yam dawb tsis yooj yim, txawm hais tias lawv cov txiaj ntsig ua rau lawv muaj nqis siv. Piv txwv, qee yam tshuaj lom neeg feem ntau yog kev txhoj puab heev thiab ua rau xeb hauv cov khoom. Lwm tus tuaj yeem tsim ib co kev cuam tshuam nrog cov hauv Cheebtsam, ua rau me ntsis insulating.

Nws tseem yuav ua tau rooj plaub ntawm kis kab mob rhiab qhov chaw, xws li qee qhov muag pom kev pom, laser diode facets, MEMS mechanism, hloov chaw, thiab lwm yam. Lwm qhov teeb meem yog tias qee yam tshuaj siv hauv cov dej-soluble fluxes, xws li polyethylene glycol, ua rau tsis muaj teeb meem ntawm cov khoom dielectric ntawm cov khaubncaws sab nraud povtseg ntawm cov ntawv luam tawm.

Hauv cov hluav taws xob ntau zaus, cov hluav taws xob flux kuj tseem tuaj yeem ua rau qee yam teeb meem. Nws tau txawm pom tias qee kis nws tuaj yeem ua rau electromigration ntawm kev sib txuas thiab tsim ntawm nplawm nplawm los ntawm ionic residues, qhov saum npoo noo lawv ua rau thiab qhov tsis ncaj ncees.

Ua ntej Kuv kuj tau ceeb toom txog kev tiv thaiv ua ntej siv cov tshuaj no, thiab qhov ntawd yog cov teeb meem organic ntuag tuaj yeem muaj kev phiv tshuajCov. Cov kuab tshuaj uas yuav tsum tau tu yog qhov tsim kev puas tsuaj, uas kuj muaj kev cuam tshuam ib puag ncig.

Kuv rov hais dua ib qho tseem ceeb hnav looj hnab looj tes, looj ntsej muag thiab hnab looj tes kev tuav. Yog ua tsis tiav yuav ua rau muaj teeb meem kev noj qab haus huv los ntawm kev sib kis ntev heev, piv txwv li, cov pa taws kub nyhiab. Qhov no tuaj yeem ua rau mob hawb pob hauv cov neeg muaj mob yooj yim dua.

Dhau los ob lub qhov muag lossis tawv nqaij nws kuj tseem tuaj yeem tsim teeb meem. Qhov tseeb, cov fluxes no ua raws daim tawv nqaij thiab tuaj yeem hloov cov cua sov kom zoo dua, ua rau kub nyhiab.

Qhov twg yuav flux?

Thaum kawg, yog tias koj xav yuav flux, koj tuaj yeem nrhiav nws ntawm tus nqi zoo hauv ntau lub khw muag khoom hluav taws xob tshwj xeeb. Cov nov qee qhov kev pom zoo:


Cov ntsiab lus ntawm tsab xov xwm ua raws li peb cov ntsiab cai ntawm kev tswj hwm kev ncaj nceesCov. Tshaj tawm ib qho yuam kev nyem no.

Yog thawj tus tuaj tawm tswv yim

Tso koj saib

Koj email chaw nyob yuav tsis tsum luam tawm. Yuav tsum tau teb cov cim nrog *

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  1. Lub luag haujlwm rau cov ntaub ntawv: Miguel Ángel Gatón
  2. Lub hom phiaj ntawm cov ntaub ntawv: Tswj SPAM, kev tswj xyuas tawm tswv yim.
  3. Sau raws cai: Koj kev tso cai
  4. Kev sib txuas lus ntawm cov ntaub ntawv: Cov ntaub ntawv yuav tsis raug xa mus rau lwm tus neeg thib peb tsuas yog los ntawm kev txiav txim siab raug cai.
  5. Cov ntaub ntawv khaws cia: Cov Ntaub Ntawv khaws tseg los ntawm Occentus Networks (EU)
  6. Txoj Cai: Txhua lub sijhawm koj tuaj yeem txwv, rov qab thiab tshem tawm koj cov ntaub ntawv.