Lub sij hawm siv tshuaj txhuam hniav tsis tas yuav ua rau lub cev siv tsis tau thaum ib tag hmo ntawm hnub luam tawm ntawm daim ntawv lo. Hnub twg, txawm li cas los xij, kos qhov kawg ntawm tus neeg muag khoom tau teev tseg lub txee- kev pov hwm lub neej raws li qhov teev cia.
Ib zaug ntau dhau los hnub ntawd, nws yuav tsum tsis txhob tso ncaj qha rau kev tsim khoom vim nws tseem zoo li qub, tuaj yeem nplawm lossis yaj thaum lub sijhawm sim ceev. Cov lus nug raug yog seb qhov ntau npaum li cas tseem tuaj yeem ua tau raws li kev luam ntawv, xa tawm, ntub dej, residue thiab kev ntseeg siab ntawm cov txheej txheem npaj.
Kev txiav txim siab tseem ceeb:Lub sij hawm ntau puas tuaj yeem ua tau raws li qhov kev lees paub ua ntej rau ib qho khoom lag luam uas qhia meej meej, txheej txheem thiab ntau npaum li cas?
Rau cov keeb kwm dav dav ntawm kev khaws cia, ua kom sov thiab lub sijhawm ua haujlwm, tshuaj xyuas cov lus qhia rausolder paste txee lub neej. Kab lus no qhia tshwj xeeb txog yuav ua li cas tom qab hnub tas sij hawm uas tau sau tseg lawm.
Teb ceev
Lub sij hawm tas sij hawm solder paste tej zaum kuj tseem ua haujlwm, tab sis nws yuav tsum ua ntej:
- cais tawm;
- txheeb xyuas los ntawm cov khoom thiab ntau;
- tshuaj xyuas rau kev khaws cia thiab keeb kwm raug raug;
- tshuaj xyuas kom pom lossis tuav cov kev hloov pauv;
- sim tawm tsam qhov kev pom zoo hauv paus;
- tso tawm tsuas yog rau kev siv, kom muaj nuj nqis thiab lub sijhawm.
Ib qho kev ua tiav tes- kev sim soldering lossis ib qho kev tso nyiaj rov qab tuaj yeem tsis txaus kom tsim nyog rau cov khoom siv tas sij hawm rau kev luam ntawv ruaj khov lossis ntim ntau lawm. Siab -kev cia siab thiab kev nyab xeeb- cov khoom muaj feem xyuam ib txwm xav tau txoj cai tswj hwm sab hauv, xws li hloov lossis sau tus neeg xa khoom xa tawm qhov twg muaj.
Hnub Nyoog Kawg txhais li cas?
Hnub tas sij hawm txuas nrog rau tus neeg muab khoom siv -tswj lub txee- thov txoj sia. Qhov kev thov no feem ntau suav tias yog pob khoom qub uas tsis tau qhib, khaws cia rau hauv qhov ntsuas qhov ntsuas kub, tsis muaj kev tswj xyuas qhov kub thiab txias, tsis muaj paug thiab tuav raws li cov lus qhia tam sim no.
Thaum cov xwm txheej no tsis paub, daim ntawv lo hnub nkaus xwb tsis tuaj yeem piav qhia txog cov khoom siv tiag tiag.
Kev Ncua Sijhawm Tsis Yog Qhov Kev Ua Tsis Taus Tam Sim No
Solder muab tshuaj txhuammuaj cov hmoov hlau alloy thiab flux- muaj tsheb. Ob leeg tuaj yeem hloov maj mam thaum khaws cia. Cov kev hloov pauv muaj xws li flux degradation, solder hmoov oxidation, hnyav poob, viscosity drift, txo tack, tsis zoo coalescence thiab tsis ruaj khov luam ntawv lossis dispensing.
Kev siv tsis raug nyob rau hauv - hnub ntau tuaj yeem ua haujlwm tsis zoo, thaum lub sijhawm khaws tseg kom raug ntau yuav tseem pom muaj kev ua haujlwm tsawg. Qhov txawv yog tias qhov ntau tas sij hawm yuav tsis nqa tib lub txee tsis siv lawm - kev ruaj ntseg lub neej.
Kev Ntsuam Xyuas Tsis Rov Pib Lub Chaw Tsim Khoom Lub Txee Lub Neej
Kev ntsuam xyuas sab hauv tuaj yeem txhawb kev siv rau cov khoom lag luam, txheej txheem, kom muaj nuj nqis thiab lub sijhawm. Nws tsis tsim cov chaw tsim khoom tshiab txee lub neej lossis ua pov thawj tias cov tshuaj txhuam hniav yuav nyob twj ywm rau txhua qhov haujlwm yav tom ntej.
Ib qho kev txwv ncua yuav tsum txheeb xyuas tus tswv pom zoo, daim ntawv tso cai, daim ntawv thov txwv tsis pub, pom zoo kom muaj nuj nqis thiab hnub kawg xa khoom.
Khaws Plaub Lub Sijhawm Sib Txawv Sib Nqus Sib Nqus
Unopened Refrigerated Shelf Life
Qhov no yog lub sij hawm tus neeg muag khoom tau teev tseg rau ib lub hnab ntim khoom ntim cia raws li cov xwm txheej tau teev tseg.
Qhib -Container Life
Tom qab qhib, lub hub, syringe lossis cartridge yuav raug rau huab cua, noo noo, paug, rov ua kom sov thiab tuav. Qhov kev txwv yuav tsum yog los ntawm cov lus qhia txog cov khoom tam sim no lossis cov txheej txheem sab hauv pom zoo.
Cumulative Room-Tsub raug
Ib lub thawv tuaj yeem ua kom sov, siv ib nrab, rov qab mus rau qhov chaw cia thiab sov dua. Lub tub yees yuav tsum tsis txhob xav tias yuav rov pib dua cov khoom qub. Sau cov ntaub ntawv raug thiab ua raws li tus neeg muag khoom txoj cai ntawm re- tub yees.
Stencil los yog Lub Neej Ua Haujlwm
Paste kis thoob plaws ib lub stencil muaj ntau qhov chaw nthuav tawm ntau dua li muab ntim rau hauv ib pob. Lub thawv tsis tas yuav tseem tuaj yeem tsim cov khoom tsis zoo tom qab cov khoom siv tau dhau nws qhov kev pom zoo stencil lossis lub neej ua haujlwm. Kev npaj kom raug thiab kev tuav pov hwm muaj nyob rau hauv phau ntawv qhiasiv solder paste kom raug.
Ua ntej txiav txim siab seb lub Paste yuav siv li cas
Tib ntau yuav tsum tsis txhob txais ib qho kev txiav txim siab thoob ntiaj teb rau txhua daim ntawv thov.
Siab -Kev ntseeg siab lossis kev nyab xeeb-Txoj kev tsim khoom
Sib sau ua ke nrog kev nyab xeeb kev ua haujlwm, kev ua haujlwm ntev - lub neej yuav tsum tau muaj, cov av noo siab lossis qhov hluav taws xob raug hluav taws xob, hloov chaw nyuaj lossis kev tswj hwm cov neeg siv khoom nruj heev xav tau kev saib xyuas zoo tshaj plaws. Kev soj ntsuam pom thiab kev sim yaj yooj yim feem ntau tsis txaus.
Qhov twg halogen tswj thiab residue kev cia siab rau qhov tseem ceeb, kev tshuaj xyuas kev pheej hmoo yuav tsum tau xav txog cov kev cai cuam tshuam nrogsiab -kev cia siab zero-halogen solder muab tshuaj txhuam.
Standard Commercial Production
Kev siv yuav tsum muaj cov ntaub ntawv sib txawv los yog tshuaj xyuas cov ntaub ntawv. Validation yuav tsum sawv cev rau qhov tseeb stencil geometry, lub tshuab luam ntawv, xav kom ncua, reflow profile thiab soj ntsuam txoj kev.
Prototype lossis txheej txheem sim
Kev ntsuam xyuas kev tswj xyuas yuav tsim nyog thaum cov khoom raug txheeb xyuas tag nrho, kev tsim tsis raug tso tawm rau cov neeg siv khoom thiab cov kev sib dhos ua tsis tiav tuaj yeem ntim tau. Kev siv engineering yuav tsum tsis txhob nthuav tawm raws li kev tsim khoom tsim nyog.
Localized Rework
Rework tej zaum yuav xav tau ib qho nyiaj me me dua li cov stencil ntau lawm, tab sis cov muab tshuaj txhuam yuav tsum tau muab faib ua ntu zus, tuav nws cov duab, coalesce, ntub cov chaw npaj thiab tsim cov ntim uas yuav tsum tau muaj.
Kev pom zoo rau qhov pom tau - kev kho cov txhuas tsis tuaj yeem ua tau zoo tib yam rau BGA, QFN lossis lwm yam zais - kev sib koom ua haujlwm.
Plaub-Txoj Kev Ntsuas Kev Ntsuas Ua Haujlwm
Kauj Ruam 1: Quarantine thiab txheeb xyuas cov khoom
Txav mus rau ntau qhov kev tswj hwm kev cais tawm ua ntej qhib nws rau kev ntsuas. Cov ntaub ntawv:
- cov npe khoom thiab chaw tsim khoom;
- ntau los yog batch tooj;
- kev tsim khoom thiab hnub tas sij hawm;
- alloy thiab hmoov hom;
- flux los yog tu system;
- pob hom, net kom muaj nuj nqis thiab sealing mob;
- qhov chaw khaws cia tam sim no.
Yog tias daim ntawv lo ploj los yog nyeem tsis tau, cov khoom siv yuav tsum tsis txhob raug kho raws li cov ntaub ntawv tsim tawm.
Kauj Ruam 2: Txheeb xyuas Cov Ntaub Ntawv Kev Tiv Thaiv thiab Tiv Thaiv Kab Mob
Cov keeb kwm tej zaum yuav tseem ceeb dua li cov hnub dhau los uas tas sij hawm. Tshawb xyuas hnub tau txais, kev thauj mus los qhov twg muaj, lub tub yees log, lub zog cuam tshuam, hnub qhib, lub voj voog ua kom sov, chav - qhov kub thiab txias, rov - tub yees thiab seb puas tau siv stencil muab tshuaj rov qab rau hauv pob.
Ib qho keeb kwm tsis tiav ntxiv qhov tsis paub tseeb tias kev sim yuav tsis tshem tawm tag nrho.
Kauj Ruam 3: Qhov xwm txheej thiab tshawb xyuas qhov muab tshuaj txhuam
Nqa cov ntim ntim rau qhov xav tau siv kub raws li nws cov lus qhia tam sim no. Tsis txhob siv lub phaj kub, rab phom kub, qhov cub lossis lwm yam kev tswj tsis tau cua sov.
Cov cim tsis lees paub muaj xws li kev ntim khoom puas, kev sib kis, tsis tu ncua agglomerates, tawv nqaij qhuav, tsis xav txog kev hloov xim, xau lossis sib cais uas tsis rov qab los ntawm txoj kev pom zoo sib xyaw.
Kev tshwm sim ib leeg tsis yog qhov kev txiav txim zaum kawg. Ib qho zoo li qub tsis ua pov thawj tias tsim nyog, thiab kev sib cais tsawg tuaj yeem raug tso cai rau qee cov qauv.
Kauj Ruam 4: Txhais lub hauv paus thiab Kev Txais Txais
Kev lees txais yuav tsum tau pom zoo ua ntej kev sim pib. Lawv yuav tsum tsis txhob raug kho tom qab paub cov txiaj ntsig.
Qhov kev txiav txim zoo sib piv yog:
- ib qho tsim nyog tshiab ntau ntawm cov khoom qub, alloy thiab hmoov hom;
- pom zoo cov ntaub ntawv keeb kwm los ntawm tib txoj kab tswj hwm;
- cov khoom specification thiab pom zoo sab hauv txheej txheem qhov rais.
Cov khoom sib txawv ntawm cov tshuaj txhuam hniav yuav tsum tsis txhob raug kho raws li kev hloov pauv hauv paus. Covua hauj lwm hauv paus ntsiab lus ntawm solder pastenyob ntawm kev ua tiav ntawm cov hmoov, hlau thauj khoom thiab flux tsheb.
Fit-rau-Siv Kev Xeem rau Kev Siv Lub Sij Hawm Kawg
Txoj kev npaj xeem yuav tsum ua raws li daim ntawv thov npaj. Cov txheej txheem tam sim no muab tshuaj txhuam muab cov txheej txheem ua cov khoom siv, tab sis kev tso tawm ntau lawm kuj yuav tsum muaj cov txheej txheem -cov neeg sawv cev kuaj xyuas.
Viscosity los yog Dispensing Check
Thaum muaj cov txheej txheem viscosity pom zoo, muab piv rau cov khoom siv tas sij hawm nrog cov qauv tsim nyog. Rau kev siv lub syringe lossis cartridge, ntsuas qhov kev xa tawm siab, tso nyiaj sib xws, txoj hlua khi, koob thaiv, cov duab tuav thiab rov ua dua tom qab ib ntus.
Ib qho muab tshuaj txhuam uas tuaj yeem yuam los ntawm rab koob yog tsis tuaj yeem txais. Nws yuav tsum tau siab thiab deposit geometry yuav tsum nyob twj ywm nyob rau hauv lub validated txheej txheem qhov rais.
Viscosity, tack thiab shear cwj pwm yog tham ntxiv nyob rau hauv tsab xov xwm ntawmsolder muab tshuaj txhuam lub cev.
Printability thiab SPI sib piv
Rau kev luam ntawv stencil, siv lub rooj tsav xwm sawv cev lossis daim coupon nrog cov stencil npaj, lub tshuab luam ntawv, qhov chaw squeegee, qhov chaw sib cais, ib puag ncig thiab cov txheej txheem ntxuav.
Ntsuam xyuas cov luam tawm rov ua dua rau aperture filling, hloov kev ua haujlwm, ntim ntim, qhov siab, cheeb tsam, offset, slump, bridging thiab luam tawm -rau - luam tawm variation. suav nrog cov neeg sawv cev zoo thiab loj apertures es tsis xaiv cov yam ntxwv yooj yim xwb.
Solder paste soj ntsuamtuaj yeem sib piv tus cwj pwm tso nyiaj ua ntej kev tso kawm thiab reflow zais qhov qub luam ntawv.
Pause thiab Recovery Test
Ib qho marginal paste tuaj yeem luam tau tam sim ntawd tom qab sib tov tab sis ua tsis zoo tom qab cov kab ib txwm nres. Ntsuam xyuas thawj cov ntawv luam tawm tom qab ncua, tso nyiaj rov qab, aperture blockage, ntim variation, paste dov thiab stencil underside contamination.
Solder Ball Test
Ib qho kev sim pob solder yuav tsum tau ua raws li txoj kev pom zoo siv. Nws ntsuam xyuas qhov nyiam ntawm kev tswj hwm qhov tso nyiaj tso rau hauv cov khoom sib cais nyob rau hauv cov xwm txheej tau hais tseg.
Txoj kev, qauv npaj, substrate, huab cua thiab thermal profile yuav tsum nyob twj ywm zoo ib yam thaum muab piv rau ntau tas sij hawm nrog nws cov hauv paus.
Kev Ntsuam Xyuas Coalescence
Kev ntsuam xyuas coalescence nug seb puas muaj cov khoom sib txuas ua ke rau hauv cov phiaj xwm molten. Cov txiaj ntsig tsis zoo tuaj yeem pom cov khoom sib cais, cov hlaws tawg, tsis tiav fusion lossis cov khoom siv tsis sib xws.
Coalescence thiab solder ball test yog cov kev soj ntsuam ntsig txog tab sis yuav tsum tsis txhob muab nthuav tawm raws li ib qho kev sim universal zoo tib yam. Siv cov ntaub ntawv sab hauv lossis tus neeg muab khoom siv -txoj kev txhawb nqa thiab txhais cov qauv kev lees paub ua ntej.
Reflow, Wetting thiab Residue Inspection
Siv tus neeg sawv cev reflow profile thiab tshuaj xyuas coalescence, ncoo wetting, txiav wetting, solder balls, graping, residue, bridging, tsis txaus solder, voiding qhov twg muaj feem xyuam thiab zais -joint zoo yog muaj.
Txoj kev tsim nyog dav dav tau tham hauvsolder kev ntsuam xyuas txoj kev. Qhov twg yuav tsum muaj dej- cov txheej txheem ntxuav tau, cov khoom seem thiab kev ntxuav yuav tsum raug tshuaj xyuas raws li qhov tsim nyogWashable SMT solder muab tshuaj txhuamtxheej txheem ntau dua li qhov xav tau los ntawm qhov tsis muaj- cov txiaj ntsig huv.
Yuav ua li cas ploj ntaub ntawv hloov qhov kev txiav txim
| Cov ntaub ntawv uas ploj lawm los yog Tsis Tswj Xyuas | Risk Tsim | Yuav tsum teb |
|---|---|---|
| Tsis muaj hnub qhib | Chav tsev sib sau- tsis paub qhov kub thiab txias | Tsis txhob xav tias lub txee tsis tau qhib -cov xwm txheej tseem siv tau |
| Tsis muaj tub yees lossis cov ntaub ntawv taug kev mus ncig | Kev ua raws li kev cia khoom tsis tuaj yeem txheeb xyuas tau | Nrhiav tus neeg muab ntawv tso rau qhov chaw muaj lossis tsis lees txais |
| Tsis muaj kev tsim nyog tshiab hauv paus | Printing thiab reflow kev sib piv tsis muaj zog | Tau txais cov ntaub ntawv tsim nyog ua ntej tso tawm ntau lawm |
| Rov qab stencil paste sib xyaw rau hauv pob | Kev kis kab mob, oxidation thiab traceability txaus ntshai | Tsis lees txais kev tsim nyog tsim nyog tshwj tsis yog ib txoj kev pom zoo tshwj xeeb tswj kev coj ua |
| Ntau daim ntawv lo lossis cov khoom lag luam tsis tiav | Cov khoom siv tsis tuaj yeem khi rau qhov tshwj xeeb | Tsis txhob tso tawm raws li cov khoom siv traceable |
| Kev sim ua rau cov khoom sib txawv lossis stencil geometry | Qhov tshwm sim yuav tsis sawv cev rau cov txheej txheem npaj | Rov sim dua raws li cov neeg sawv cev |
Daim Ntawv Qhia Kev Txais thiab Kev Tso Cai
| Qhov xwm txheej | Kev Pom Zoo |
|---|---|
| Cov ntaub ntawv khaws cia tsis paub lossis tsis muaj traceability | Tsis lees paub lossis nrhiav kev tshuaj xyuas tus neeg muag khoom thaum muaj |
| Pob puas, paug los yog pheej qhuav qhuav | Tsis lees paub |
| Siab -kev ntseeg siab lossis kev nyab xeeb- ntsig txog kev tsim khoom | Siv txoj cai tswjfwm sab hauv, feem ntau hloov lossis kev sau ntawv raug cai |
| Txheem ntau lawm nrog keeb kwm tiav | Ntsuam xyuas los ntawm kev pom zoo tsim tawm - cov phiaj xwm sawv cev |
| Prototype lossis engineering sim | Kev soj ntsuam xyuas yuav tsim nyog |
| Txhais tau qis-kev pheej hmoo rov ua haujlwm dua | Ntsuam xyuas kev xa tawm, coalescence, wetting thiab residue rau daim ntawv thov |
| Luam tawm lossis xa cov txiaj ntsig tawm sab nraum lub hauv paus txheej txheem ua ntej | Tsis lees paub rau tus txheej txheem ntawd |
| Solder pob, coalescence lossis wetting tshwm sim tsis tau | Tsis lees paub |
| Tus neeg muab kev pabcuam muab qhov txuas ntxiv lossis sau ntawv | Siv tsuas yog nyob rau hauv cov ntaub ntawv tej yam kev mob |
Hom hmoov thiab Flux Chemistry hloov qhov kev pheej hmoo
Tsis yog txhua tus pastes hnub nyoog tib yam. Finer hmoov muaj tag nrho cov hlau saum npoo av rau lub flux system los tiv thaiv thiab qhib. Qhov kev txiav txim siab yuav tsum xav txog hom hmoov, alloy, hlau thauj khoom, flux chemistry, ntim, khaws cia keeb kwm, aperture loj thiab xav tau lub neej stencil.
Fine-feature thiab semiconductor txheej txheem tej zaum yuav muaj lub qhov rais nqaim dua li qhov loj, siv tau tes- thov tso nyiaj. Cov khoom tsim nyog rau cov ntawv thov no tau piav qhia hauvsemiconductor solder pastentu.
Kev txiav txim siab rau ib qho alloy lossis hmoov hom yuav tsum tsis txhob raug xa mus rau lwm yam khoom. Alloy xaiv thiab tus cwj pwm tuaj yeem tshuaj xyuas hauv phau ntawv qhiatin solder alloys rau PCB los ua ke.
Tsis txhob rov qab muab tshuaj txhuam tas los ntawm kev ntxiv Flux lossis Solvent
Ntxiv cov flux cais, hnyav lossis thinner yuav ua rau cov hnub nyoog muab tshuaj zoo li yooj yim rau sib tov lossis sib kis, tab sis nws hloov cov hlau - mus rau -flux ratio, viscosity, tack, slump, evaporation cwj pwm, residue chemistry, solder ntim thiab traceability.
Cov khoom hloov kho tsis yog cov qauv piav qhia los ntawm cov ntaub ntawv thev naus laus zis. Qhov txawv ntawmsolder muab tshuaj txhuam thiab cais fluxpiav qhia vim li cas ib qho khoom siv yuav tsum tsis txhob siv los ua ib qho kev kho kom rov zoo li qub rau lwm tus.
Kev txiav txim siab ua piv txwv
Cov piv txwv hauv qab no yog kev piav qhia thiab tsis yog ib daim ntawv qhia txog qhov tseeb ntau lawm.
Ib lub thawv ntim tau pom dhau ntawm nws cov ntawv luam tawm hnub tas sij hawm. Cov naj npawb ntau thiab ntsuas kub tau ua tiav, tsis muaj kev mus ncig ua si raug kaw thiab kev thov siv yog kev tswj hwm engineering tsim ntau dua li tso tawm siab - kev ntseeg siab ntau lawm.
Pab neeg no cais lub hub, tshuaj xyuas cov lus qhia txog cov khoom tam sim no, cov xwm txheej tsis qhib, tshuaj xyuas nws, muab piv nrog cov txheej txheem tshiab tsim nyog, ua haujlwm rov luam dua thiab SPI kuaj xyuas, ntsuas lub pob solder thiab coalescence tus cwj pwm, thiab cov ntaub ntawv txwv - siv kev txiav txim siab.
Qhov kev txiav txim siab yuav muaj kev saib xyuas ntau dua yog tias lub foob tau tawg, cov ntaub ntawv khaws cia tsis tiav lossis cov khoom npaj muaj kev nyab xeeb - cuam tshuam cov pob qij txha.
Sau qhov kev txiav txim siab thiab muab lub luag haujlwm
| Cov ntaub ntawv lossis kev txiav txim siab | Tus tswv |
|---|---|
| Cov ntaub ntawv muab khoom, ntau tus kheej thiab cov ntaub ntawv yuav khoom | Kev yuav khoom lossis tswj cov khoom |
| Cov ntaub ntawv khaws cia thiab raug kaw | Warehouse lossis ntau lawm cov khoom tswj |
| Sau, SPI, dispensing thiab reflow xeem | Txheej txheem engineering |
| Kev lees txais cov qauv thiab cov khoom pheej hmoo | Quality thiab khoom engineering |
| Txwv tsis pub siv, txwv tsis pub siv thiab hnub tso tawm | Tso cai cov ntaub ntawv tshuaj xyuas tus tswv |
Cov ntaub ntawv zaum kawg yuav tsum txheeb xyuas qhov ntau, hnub tas sij hawm, kev ntsuam xyuas vim li cas, kev tshuaj xyuas kev cia khoom, cov hauv paus ntsiab lus, cov txheej txheem, cov txiaj ntsig, kev pom zoo siv, txwv tsis pub siv, kom muaj nuj nqis, tus neeg pom zoo thiab qhov kawg pov tseg lossis rov ua haujlwm.
Ntau qhov kev pom zoo rau ib qho kev txwv yuav tsum tsis txhob muaj nyob rau hauv qhov qhib - xaus "kuaj ib zaug" xwm txheej.
FAQ
Q: Puas yog solder paste tam sim ntawd poob tom qab hnub tas?
A: Tsis yog. Hnub tim yog qhov kawg ntawm lub txee tau teev tseg - kev pov hwm lub neej raws li cov xwm txheej tau teev tseg. Kev siv txuas ntxiv yuav tsum muaj kev tshuaj xyuas thiab cov txheej txheem tswj hwm - kev sim ntsuas.
Q: Puas tuaj yeem siv cov tshuaj txhuam hniav tas sij hawm rov ua dua?
A: Muaj peev xwm ua tau rau daim ntawv thov uas tau teev tseg tom qab kuaj xyuas qhov tseeb, khaws cia, xa tawm, coalescence, ntub dej thiab seem. Kev pom zoo rau ib txheej txheem rework tsis tsim nyog muab tshuaj rau ntim luam ntawv lossis cov pob qij txha zais.
Q: Puas siv tau cov tshuaj txhuam hniav tas sij hawm rau kev tsim khoom?
A: Nws yuav tsum tsis txhob raug tso tawm. Cov txheej txheem ntau lawm yuav tsum tau txais kev lees paub ua ntej thiab kev lees paub tus neeg sawv cev. Siab - kev pheej hmoo ntau lawm feem ntau siv nyob rau hauv - cov ntaub ntawv hnub tim lossis kev sau ntawv raug cai.
Q: Kuv tuaj yeem qhia tau li cas tias cov tshuaj txhuam hniav tsis zoo?
A: Cov cim ceeb toom muaj xws li cov agglomerates tsis tu ncua, kev xa tawm tsis zoo, ntim tsis ruaj khov, tso tawm cov stencil tsis zoo, cov khoom siv solder, tsis tiav coalescence, graping thiab tsis muaj zog wetting. Sib piv nrog cov txheej txheem tsim nyog vim tias cov tsos mob no tuaj yeem muaj lwm yam ua rau.
Q: Puas tuaj yeem muab tshuaj txhuam rov qab ua kom sov dua?
A: Tsuas yog raws li cov lus qhia ntawm cov khoom tam sim no thiab kev pom zoo raug pom zoo- txheej txheem tswj. Lub tub yees yuav tsum tsis txhob xav tias yuav rov pib dua chav sib sau- qhov kub thiab txias.
Q: Puas yog qhov kev kuaj xyuas kev sib raug zoo txaus?
A: Tsis yog. Kev siv ntau lawm kuj yuav xav tau kev luam tawm, rov ua dua, ncua kev rov qab, cov pob khawm, ntub dej, qhov seem thiab cov khoom siv - cov kev kuaj xyuas tshwj xeeb.
Xaus
Cov tshuaj nplaum uas siv tas sij hawm yog cov khoom siv - tswj kev txiav txim siab, tsis yog ib qho yooj yim yog - lossis - tsis muaj lus nug. Qhov kev txiav txim siab yuav tsum pib nrog cov khoom pheej hmoo, ntau tus kheej, keeb kwm khaws cia thiab cov qauv kev lees paub ua ntej.
Thaum cov keeb kwm tsis paub, lub pob raug cuam tshuam, qhov kev sim tseem ceeb tsis ua tiav lossis daim ntawv thov muaj kev pheej hmoo ntawm kev ntseeg siab, hloov cov tshuaj txhuam yog feem ntau muaj kev tiv thaiv ntau dua li sim rov qab nws cov nqi ntxiv.
Rau kev xaiv cov khoom siv los yog tuav kev taw qhia raws li alloy, hmoov Hom, pob, khaws cia keeb kwm thiab cov txheej txheem npaj, xa cov ntsiab lus los ntawmYIHMA nplooj ntawv nug.
