Cov txheej txheem kho PCBA

Cov txheej txheem rov ua haujlwm PCBA (Printed Circuit Board Assembly) yog ib txoj hauv kev los nrhiav qhov tsis zoo hauv cov rooj sib dhos uas tsis zoo lossis ua haujlwm tsis zoo, tshem tawm cov khoom tsis zoo, thiab rov ua dua cov khoom tsim nyog. Cov ntaub ntawv qhia tias kwv yees li 5% -15% ntawm PCBA xav tau kev ua haujlwm rov ua dua thaum lub sijhawm tsim khoom siv hluav taws xob.

Kev kho dua tshiab daws cov teeb meem xws li kev vuam tsis zoo thiab cov khoom tsis ua haujlwm thaum lub sijhawm tsim khoom, nrog rau cov khoom kho kom zoo yuav tsum ua tau raws li cov qauv tsim khoom qub; kev kho kho cov teeb meem tshwm sim los ntawm kev laus, kev siv tsis raug, thiab lwm yam, hauv cov khoom siv twb siv lawm. Ib qho qauv zoo heev hauv kev lag luam yog tswj hwm tus nqi kho dua tshiab tsis pub dhau 3%.

Cov txheej txheem ib txwm muaj yog: nrhiav qhov txhaum → qhov chaw tsis zoo → tshem tawm cov khoom → ntxuav lub ncoo → vuam cov khoom tshiab → tshuaj xyuas thiab txheeb xyuas. Ntawm lawv, kev tshem tawm cov khoom thiab vuam suav txog 60% -70% ntawm tag nrho cov sijhawm ua.

Txawm tias nyob rau hauv cov kab ntau lawm SMT siab heev, tseem muaj qhov tsis zoo ntawm soldering ntawm 0.1% -1% (xws li kev soldering txias thiab kev txuas). Kev ua haujlwm dua tuaj yeem txhim kho cov nqi tsim nyog ntawm cov khoom, txo cov nqi tsim khoom, thiab zam kev pov tseg tag nrho lub rooj tsavxwm.

Nws tuaj yeem txhim kho cov khoom tsim tawm thawj zaug, txo cov nqi tsim khoom, xyuas kom meej tias cov khoom zoo thiab kev ntseeg siab, thiab txo cov nqi kho tom qab muag. Cov kev tshawb fawb qhia tau tias cov txheej txheem ua haujlwm zoo tuaj yeem ua rau cov khoom ntseeg siab ntxiv los ntawm 20% -30%.

Feem ntau suav nrog cov chaw ua haujlwm cua sov, chaw ua haujlwm infrared rework, chaw ua haujlwm BGA rework, twj desoldering, microscopes, thiab lwm yam. Ntawm lawv, chaw ua haujlwm BGA rework muaj qhov kub thiab txias tswj tau qhov tseeb ntawm ± 1 ℃, tsim nyog rau kev ua haujlwm siab BGA.

Nws tsim cua kub los ntawm lub raj cua sov, thiab tshuab cua kub rau ntawm cov khoom uas yuav tsum tau ua dua los ntawm lub nozzle, yaj cov solder kom ua tiav kev tshem tawm lossis soldering. Qhov kub ntawm cua kub feem ntau tuaj yeem hloov kho tau ntawm 200-450 ℃, nrog rau qhov ceev ntawm 5-50L / feeb.

BGA rework chaw nres tsheb muaj kev tswj kub ywj pheej rau ntau thaj chaw kub, ua kom muaj kev tswj kub nyuaj, tsim nyog rau cov khoom siv ntim khoom xws li BGA thiab CSP; cov chaw ua haujlwm cua sov feem ntau yog siv rau cov pob khoom ib txwm muaj xws li QFP thiab SOP. Tus nqi ntawm BGA rework chaw nres tsheb yog li 3-5 npaug ntawm cov chaw ua haujlwm cua sov ib txwm muaj.

Lawv muab faib ua cov twj siv tes tshem cov hlau nplaum, cov twj siv hluav taws xob tshem cov hlau nplaum, thiab cov phom nqus tsev tshem cov hlau nplaum. Cov twj siv tes tshem cov hlau nplaum yog qhov tsim nyog rau kev tshem tawm cov pob qij txha me me, cov twj siv hluav taws xob tshem cov hlau nplaum ua haujlwm tau zoo dua, thiab cov phom nqus tsev tshem cov hlau nplaum yog qhov tsim nyog rau cov khoom siv ntau tus pin. Cov twj siv hluav taws xob tshem cov hlau nplaum sai dua li cov uas siv tes tshem cov hlau nplaum 3-5 zaug.

Rau cov khoom siv me me xws li 0201 thiab 01005, yuav tsum muaj lub tshuab tsom iav uas muaj qhov loj dua 50-100 npaug; rau cov khoom siv ib txwm muaj, qhov loj dua 10-30 npaug txaus. Cov tshuab tsom iav uas muaj qhov loj dua kim dua li 2-3 npaug dua li cov uas muaj qhov loj dua me.

Teem raws li cov khoom ntim thiab hom solder. Rau Sn63Pb37 solder, qhov kub tshem tawm feem ntau yog 350-380 ℃, thiab qhov kub soldering yog 320-350 ℃; rau cov solder tsis muaj lead (xws li SAC305), qhov kub tshem tawm yog 380-420 ℃, thiab qhov kub soldering yog 350-380 ℃. Qhov kub siab dhau heev yooj yim ua rau puas tsuaj rau cov khoom, thaum qhov kub qis dhau tiv thaiv cov solder los ntawm kev yaj.

Feem ntau nws muaj xws li thaj chaw ua ntej cua sov (qhov kub ntawm 1-3 ℃ / s, qhov kub thiab txias 120-150 ℃), thaj chaw ntub dej (150-180 ℃, 60-120s), thaj chaw rov ua dua (qhov kub siab tshaj plaws 217-235 ℃, tswj tau 30-60s), thiab thaj chaw txias (qhov txias ntawm 2-4 ℃ / s). Kev teeb tsa qhov nkhaus kub tsis raug tuaj yeem ua rau muaj teeb meem xws li BGA txias soldering thiab solder pob tawg.

Qhov cua ceev dhau heev tuaj yeem tshuab cov khoom me me lossis ua rau cov khoom sib txuas; qhov cua ceev dhau ua rau tsis txaus cua sov hloov pauv. Feem ntau, qhov cua ceev rau 0402 thiab cov pob khoom saum toj no yog teeb tsa ntawm 10-20L / feeb, thiab rau 0201 thiab qis dua, nws yog 5-10L / feeb.

Nws raug pom zoo tias lub sijhawm vuam rau ib qho sib koom ua ke tsis pub tshaj 3 vib nas this, thiab kev vuam tas mus li tsis pub tshaj 10 vib nas this. Lub sijhawm vuam ntev dhau ua rau muaj kev pheej hmoo ntawm PCB cov ntawv ci tooj liab tev tawm los ntawm 30% thiab qhov muaj feem yuav puas tsuaj los ntawm 25%.

Kho raws li qhov loj ntawm PCBA thiab qhov ceev ntawm cov khoom, feem ntau nrog lub zog ceev ntawm 1-3W / cm². Lub zog siab dhau heev tuaj yeem ua rau lub zog kub dhau thiab ua rau lub PCB puas, thaum lub zog qis dhau ua rau kev ua kom sov tsis zoo.

Siv lub chaw ua haujlwm cua kub rov ua dua tshiab, taw lub nozzle rau ntawm cov pins, cua sov ntawm 350-380 ℃ nrog lub zog cua ntawm 15-20L / min, thiab tshem tawm cov khoom siv tweezers tom qab cov solder yaj. Tom qab tshem tawm, ntxuav cov pads nrog desoldering wick.

Ua ntej, teem ib qho kub kom haum. Tom qab cov pob solder yaj tag, ua tib zoo tshem BGA nrog lub tshuab nqus tsev; ntxuav cov solder seem ntawm cov ntaub qhwv thiab rov ua dua siv cov tshuaj nplaum solder. Qhov ua tiav ntawm kev tshem tawm BGA yog 85% vim yog qhov sib phim ntawm qhov kub.

Sau cov kev taw qhia polarity ntawm cov khoom kom tsis txhob rov qab teeb tsa; ua tib zoo saib xyuas kom muaj cua sov sib npaug thaum tshem tawm kom tiv thaiv cov khoom tawg vim yog qhov kub dhau. Kev teeb tsa polarity tsis raug ua rau cov khoom tsis ua haujlwm ntau ntxiv 40%.

Hauv cov xwm txheej zoo li no, yuav tsum tau kuaj xyuas X-ray kom paub qhov chaw ntawm cov pob qij txha, thiab siv cov txheej txheem cua sov hauv zos (xws li cua sov laser) los tshem tawm. Nws nyuaj heev, nrog rau qhov ua tiav tsuas yog 60% -70%.

Tswj qhov kub thiab lub sijhawm ua kom sov, thiab tsis txhob ua kom sov ntau zaus rau tib qho chaw; siv cov cuab yeej tsim nyog, xws li siv tus pas nrig los pab tshem cov khoom loj kom txo qhov rub ntawm PCB. Kev ua haujlwm kom raug tuaj yeem txo qhov kev puas tsuaj ntawm PCB los ntawm 50%.

Siv cov hlau soldering los ntxuav cov hlau uas seem ntawm cov ntaub qhwv los ntawm kev siv cov hlau soldering wick: muab cov hlau soldering ntub rau hauv cov kua nplaum, muab tso rau ntawm daim ntaub qhwv, thiab ua kom sov nrog cov hlau kom nqus tau cov hlau soldering. Siv qhov dav ntawm cov hlau soldering kom phim cov ntaub qhwv kom tsis txhob ntxuav ntau dhau lossis tsis txaus.

Maj mam xuab cov txheej oxidized nrog daim ntawv xuab zoo, siv cov flux, thiab cua sov kom rov qab tau solderability. Cov pads oxidized tsis kho tuaj yeem ua rau 80% ​​​​qhov tsis zoo ntawm soldering.

Yog tias ib feem ntawm qhov sib cais, siv cov xov hlau jumper; yog tias tag nrho qhov sib cais, rov ua dua lub ncoo (tooj liab plating, solder mask coating) thiab sim ua haujlwm hluav taws xob tom qab kho.

Siv lub hau hlau soldering uas zoo li lub chisel los txhuam cov soldering ntau dhau, thiab xuab yog tias tsim nyog. Qhov yuam kev ntawm qhov tiaj tiaj yuav tsum nyob hauv ± 0.05 hli kom tsis txhob muaj teeb meem soldering.

Yog. Siv cov ethanol anhydrous lossis cov tshuaj ntxuav tshwj xeeb kom tshem tawm cov dej seem thiab cov khoom tsis huv, zam kom tsis txhob muaj 20% ntxiv ntawm cov teeb meem soldering thiab PCB xeb.

Tshawb xyuas cov lus qhia ntawm cov khoom, muab cov ntaub qhwv rau hauv lub lauj kaub, thiab npaj cov cuab yeej thiab cov kua dej kom haum. Kev npaj tsis txaus yuav ua rau muaj 30% ntawm kev ua haujlwm dua.

Siv lub tshuab microscope thiab chaw ua haujlwm cua sov lossis lub hlau soldering uas ntse. Kho ib tus pin ua ntej, tom qab ntawd solder qhov seem kom paub tseeb tias qhov chaw raug.

Siv X-ray los tshuaj xyuas cov kev sib txuas ntawm cov pob solder (qhov tsis muaj dab tsi ≤5%) thiab lub multimeter rau kev sib txuas hluav taws xob. X-ray ntes tau ntau dua 90% ntawm cov qhov tsis zoo.

Kho cov khoom siv nrog cov nplaum lossis cov kua nplaum ua ntej soldering, thiab cua sov kom sib npaug kom tsis txhob muaj kev ntxhov siab thermal. Kev hloov pauv yog qhov ua rau 15% -20% ntawm cov teeb meem soldering.

Cov xov tooj liab yooj yim soldering; cov xov hlau xav tau pre-tinizing; cov xov hlau alloy xav tau cov flux sib phim. Cov xov hlau tsis kho muaj 70% soldering defect rate.

Xws li kev kuaj pom, kev sim ua haujlwm hluav taws xob (kev txuas ntxiv mus, kev tiv thaiv rwb thaiv tsev), thiab kev sim ua haujlwm. Kev kuaj pom pom 70% -80% ntawm cov qhov tsis zoo uas pom tseeb.

Xyuas kom meej tias cov pob qij txha sib txuas du thiab tiaj tus yam tsis muaj kev sib txuas txias, kev sib txuas, lossis cov dej khov; xyuas kom meej tias cov xov hlau tau sib txuas tag nrho thiab tsis puas. Yuav tsum ua raws li cov qauv IPC-A-610.

Tshawb nrhiav qhov zoo ntawm cov khoom sib txuas sab hauv ntawm BGA / CSP, txheeb xyuas cov khoom siv vuam txias, cov pob vuam tawg, thiab cov qhov khoob, nrog ntau dua 95% qhov tsis zoo ntawm kev kuaj pom cov teeb meem sab hauv.

Sim kev ua haujlwm hluav taws xob los ntawm kev siv cov khoom siv txaj ntsia hlau, nrhiav pom cov teeb meem luv luv, qhov qhib, thiab cov teeb meem ntawm cov khoom, npog 80% -90% ntawm kev sib txuas hluav taws xob.

Muab PCBA tso rau hauv ib lub tshuab los ua qauv qhia txog tej yam kev ua haujlwm tiag tiag thiab sim ua haujlwm, txheeb xyuas 90% ntawm kev ua haujlwm tsis zoo uas tshwm sim los ntawm kev vuam.

Ua rau: cov ntaub so tsis huv, qhov kub tsis txaus, cov dej ntws tsis zoo. Cov kev daws teeb meem: ntxuav cov ntaub so dua, kho qhov kub/lub sijhawm, thiab hloov cov dej ntws nrog cov khoom zoo.

Siv lub wick/iron los tshem cov solder uas ntau dhau, kho qhov kub thiab cua ntawm soldering kom tiv thaiv kev txaws. Kev siv kom raug ua tiav qhov kho tau 95%.

Tej yam ua rau: kev puas tsuaj ntawm cov khoom, kub dhau thaum lub sijhawm vuam, thiab rov qab polarity. Cov ntaub ntawv qhia tias kev puas tsuaj ntawm cov khoom muaj 40%, thiab kub dhau 30%.

Kho qhov kev hloov me me los ntawm kev ua kom sov; hloov cov PCBs rau qhov kev hloov loj heev. Kev tswj qhov kub/lub sijhawm txo qhov kev hloov pauv los ntawm 60%.

Siv cov rooj ua haujlwm uas muaj kev nyab xeeb rau ESD, cov hlua khi dab teg, thiab cov tweezers; tswj kom muaj 40% -60% RH av noo kom txo tau kev puas tsuaj ntawm ESD los ntawm 90%.

Cov neeg ua haujlwm yuav tsum hnav tsom iav/hnab looj tes tiv thaiv kom tsis txhob kub hnyiab; muab cov khoom siv hauv av tso rau hauv av kom tsis txhob raug hluav taws xob poob siab; cim cov cim ceeb toom rau cov khoom siv kub heev.

Cov khoom pov tseg, cov khoom siv solder, thiab cov kua dej yog cov khib nyiab txaus ntshai, yuav tsum tau muab pov tseg los ntawm cov chaw tsim nyog; cov dej khib nyiab ntxuav yuav tsum ua tau raws li GB 8978 cov qauv tso tawm.

Feem ntau cov kua dej yooj yim hlawv thiab yuav tsum tau khaws cia rau hauv qhov chaw txias, muaj cua nkag mus deb ntawm cov chaw hluav taws; tsis txhob kov daim tawv nqaij/qhov muag thiab yaug nrog dej tam sim ntawd yog tias raug.

Ntxuav cov khoom seem thiab cov kua nplaum ntawm cov khoom siv tas li; nruab cov kev tiv thaiv overheat kom tua tau hluav taws xob thaum qhov kub tshaj qhov txwv.

Yuav tsum ua raws li cov lus qhia ntawm RoHS, txwv tsis pub muaj cov tshuaj lom xws li cov hlau lead/mercury/cadmium, txo cov dej ntws tawm, thiab siv cov tshuaj ntxuav uas tsis ua rau ib puag ncig puas tsuaj.

Txhim kho cov txheej txheem, siv cov khoom siv tsis siv neeg, thiab cob qhia cov neeg ua haujlwm. Cov khoom siv tsis siv neeg tuaj yeem ua rau kev ua haujlwm zoo dua los ntawm 30% -50%.

Txo qhov kev ua haujlwm rov ua dua zaum ob vim yog kev ua haujlwm tsis raug, xaiv cov cuab yeej/cov ntaub ntawv kom zoo, thiab ua kom cov txheej txheem zoo dua kom txo tau qhov tshwm sim ntawm qhov tsis zoo thaum pib. Kev ua haujlwm rov ua dua zaum ob suav txog 25% -35% ntawm tag nrho cov nqi.

Txhim kho cov txheej txheem txheej txheem, xaiv cov flux/solder uas tsim nyog, thiab txhawb kev tshuaj xyuas thawj zaug thiab kev kuaj xyuas thaum lub sijhawm ua haujlwm. Kev txhim kho cov txheej txheem tuaj yeem txo cov nqi tsis zoo los ntawm 40% -60%.

Txhim kho qhov ruaj khov ntawm qhov zoo, txo qhov yuam kev ntawm tib neeg, pab txhawb kev cob qhia cov neeg ua haujlwm tshiab, thiab txhim kho kev ua haujlwm zoo. Kev ua kom raws li tus qauv tuaj yeem txo qhov kev hloov pauv ntawm qhov tsis zoo los ntawm 50%.

Ua qhov kev sim laus (24-100 teev) thiab kev sim ib puag ncig (kub/av noo/kev co) ntawm cov khoom kho dua tshiab los ntsuas qhov kev ntseeg tau mus sij hawm ntev.

Nws yog ib qho tsim nyog yuav tsum xav txog qhov yuav tsum tau ua haujlwm dua ntawm ob qho tib si SMT thiab THT Cheebtsam. Thaum tshem tawm cov khoom THT, yuav tsum tau them sai sai rau qhov cuam tshuam rau SMT cov khoom siv. Qhov nyuaj ua haujlwm dua yog 30% -50% siab dua li ntawm cov laug cam SMT ntshiab.

Cov khoom siv yog mos thiab yooj yim rau deform, yog li xav tau cov khoom siv tshwj xeeb rau kev kho; qhov kub ntawm cua sov yuav tsum qis dua 10-20 ℃ dua li ntawm cov PCB tawv kom tsis txhob ua rau lub substrate puas tsuaj.

Lub voj voog sab hauv yog qhov nyuaj, thiab qhov hloov pauv cua sov tsis sib xws thaum lub sijhawm cua sov, uas yog qhov ua rau luv luv lossis qhib voj voog ntawm txheej sab hauv; kev kho lub ncoo yog qhov nyuaj, thiab qhov ua tiav ntawm kev ua haujlwm rov ua dua tsuas yog 50% -60%.

Tshem tawm lub hau tiv thaiv ua ntej thiab tiv thaiv cov khoom sab hauv. Rov nruab nws tom qab ua haujlwm dua kom ntseeg tau tias muaj kev tiv thaiv. Kev ua haujlwm tsis raug yuav cuam tshuam rau kev sib raug zoo ntawm hluav taws xob.

Nws muaj cov thermal conductivity zoo thiab brittleness siab. Nws xav tau cua sov sai kom tsis txhob tawg los ntawm kev ntxhov siab hauv zos, thiab qhov kub zoo tshaj plaws yog tswj ntawm 5-10 ℃ / s.

Lawv yuav tsum paub txog kev txawj xws li kev txheeb xyuas cov khoom, kev siv tshuab vuam, kev ua haujlwm ntawm cov khoom siv, thiab kev tshuaj xyuas qhov txhaum, thiab paub txog cov qauv xws li IPC-A-61. Tus nqi ntawm cov neeg ua haujlwm tau kawm tiav qib siab yog qis dua 40% piv rau cov neeg tshiab.

Nws suav nrog kev cob qhia theoretical (kev paub txog cov txheej txheem, cov qauv qhia) thiab kev cob qhia ua haujlwm (kev siv khoom siv, kev xyaum vuam), nrog rau kev ntsuam xyuas tom qab kev cob qhia, thiab lub voj voog feem ntau yog 1-2 lub lis piam.

Nws suav nrog cov lus qhia txog kev ua haujlwm dua tshiab, phau ntawv qhia kev siv khoom siv, cov qauv tshuaj xyuas zoo, cov ntaub ntawv rov ua haujlwm, thiab lwm yam, uas tuaj yeem txhim kho kev taug qab thiab kev tshuaj xyuas teeb meem.

Teem cov ntsiab lus tswj tseem ceeb (xws li kev tshem tawm cov khoom, kev ntxuav lub ncoo, kev vuam, thiab lwm yam), thiab ua qhov kev tshuaj xyuas thawj zaug, kev tshuaj xyuas kev saib xyuas thiab kev tshuaj xyuas cov khoom tiav, uas tuaj yeem txo qhov tsis xws luag los ntawm 30% -40%.

Sau cov ntaub ntawv rov ua haujlwm los tshuaj xyuas cov teeb meem, ua cov kev sim txheej txheem los txhim kho cov kev teeb tsa, thiab qhia cov thev naus laus zis tshiab thiab cov khoom siv, uas tuaj yeem ua rau kev ua haujlwm zoo dua 10% -15% txhua xyoo.

Xaiv raws li hom PCBA solder qub, muab qhov tseem ceeb rau cov khoom uas muaj cov khoom sib xws, thiab xav txog kev ua tau zoo xws li qhov melting point, wettability, thiab kev ntseeg tau.

Lawv muab faib ua cov kua dej uas tsis huv, cov kua dej uas yaj tau hauv dej thiab cov kua dej uas ua los ntawm rosin. Cov kua dej uas tsis huv yog qhov tsim nyog rau cov sijhawm uas tsis tas yuav tsum tau ntxuav ntau, thiab cov kua dej uas yaj tau hauv dej yooj yim rau kev ntxuav tab sis yuav tsum tau sau tseg cov seem seem.

Nws yog siv los kho cov khoom me me lossis tiv thaiv kev hloov chaw thaum vuam, thiab yuav tsum muaj lub zog sib txuas zoo (≥5N / mm²) thiab tiv taus kub.

Xaiv raws li hom flux (xws li isopropyl cawv rau rosin-based), thiab xav txog kev tiv thaiv ib puag ncig, kev xeb thiab kev hloov pauv.

Yuav tsum tau kuaj xyuas tus qauv, qhov tshwj xeeb, qhov tsos, kev ua haujlwm hluav taws xob, thiab lwm yam kom paub tseeb tias sib xws nrog cov khoom qub. Cov ntaub ntawv tsis zoo yuav ua rau qhov ua tsis tiav ntawm kev kho dua tshiab nce ntxiv 20%.

Ntxuav cov khoom tsis huv hauv lub qhov cua kom tiv thaiv kev txhaws, xyuas qhov xwm txheej ntawm lub raj cua sov thiab kho qhov kub tsis tu ncua, thiab roj rau cov khoom siv kho tshuab. Kev txhaws ntawm lub qhov cua yuav ua rau qhov vuam puas tsuaj ntau ntxiv li ntawm 15%.

Qhov kub raug calibrated ib hlis ib zaug (yuam kev ≤ ± 1 ℃), thiab qhov siab Z-axis raug calibrated ib hlis ib zaug (qhov tseeb ≤ ± 0.05mm). Uncalibrated yuav ua rau kom qhov void void ntawm welding nce ntxiv 20%.

Kev nqus tsis txaus: hloov lub nplhaib foob rau lub twj tso kua mis tes, xyuas lub twj tso kua mis nqus tsev lossis ntxuav qhov thaiv rau lub twj tso kua mis hluav taws xob; tsis tuaj yeem tshem tawm: xyuas seb lub nozzle puas puas lossis thaiv, hloov thiab ntxuav cov khoom seem.

Feem ntau, nws raug hloov txhua 1-2 xyoos raws li qhov siv zaus. Tom qab laus, qhov kub tsis sib xws txo qis, thiab qhov vuam tsis zoo nce ntxiv li ntawm 12%.

Siv daim ntawv tshwj xeeb los ntxuav lub lens tas li, tsis txhob sib tsoo kom tiv thaiv kev hloov chaw ntawm cov khoom siv kho qhov muag, thiab kho qhov ntev ntawm lub lens txhua xyoo kom ntseeg tau tias muaj duab meej.

Ua ntej, siv cov tshuaj yaj tshuaj (xws li acetone) los yaj cov khoom encapsulation, rov ua haujlwm raws li cov txheej txheem ib txwm muaj tom qab tshem tawm, thiab rov encapsulate tom qab ua tiav, them sai sai rau qhov fluidity thiab kho cov xwm txheej ntawm cov khoom.

Muab qhov tseem ceeb rau kev tshem tawm cov khoom loj thiab cov khoom tsim cua sov siab kom tsis txhob cuam tshuam rau cov khoom kho; ua raws li lub hauv paus ntsiab lus ntawm qhov yooj yim mus rau qhov nyuaj kom txo tau kev pheej hmoo.

Yuav tsum muaj cov khoom siv tshwj xeeb (xws li lub chaw ua haujlwm rov ua dua tshiab), thiab siv laser cua sov lossis ultrasonic welding technology. Cov kev ntsuas tau txiav txim siab los ntawm kev sim ua ntej, thiab feem ntau yog 60% -70%.

Siv lub multimeter rau kev sim kev sib txuas kom pom qhov luv luv ntawm lub voj voog, thiab xyuas thiab daws cov teeb meem xws li kev sib txuas ntawm cov khoom seem solder, kev sib txuas ntawm tus pin tsis sib haum, thiab kev puas tsuaj ntawm PCB circuit.

Xyuas seb qhov av puas zoo thiab lub hau tiv thaiv puas tau teeb tsa rau hauv qhov chaw, xyuas seb cov kab teeb liab puas puas thaum vuam, siv lub tshuab ntsuas spectrum los ntes qhov chaw cuam tshuam, thiab ua cov kev ntsuas xws li kev tiv thaiv thiab kev lim dej.

Tshawb xyuas cov ntaub ntawv rov ua haujlwm los ntawm kev kawm tshuab los kwv yees qhov tsis zoo, siv kev pom kev los nrhiav cov khoom tsis zoo, thiab kho cov khoom siv kom zoo dua qub thiab zoo.

Nws yuav tsim kom muaj kev sib koom ua ke ntawm qhov tseeb thiab ntau yam kev ua haujlwm (xws li kev sib koom ua ke ntawm kev tshuaj xyuas X-ray, kev cog pob tsis siv neeg, kev vuam, thiab lwm yam), thiab paub txog kev sib txuas nrog MES system los txhim kho kev tswj hwm ntse.

Txhawb kom muaj cov kua dej thiab cov tshuaj ntxuav uas tsis ua rau ib puag ncig puas tsuaj, tsim cov khoom siv uas siv hluav taws xob tsawg, thiab tshawb nrhiav cov thev naus laus zis kho dua tshiab uas tsis ua rau puas tsuaj kom txo tau kev ua qias tuaj thiab kev pov tseg cov khoom siv.

Nws tuaj yeem tsim cov khoom siv rau kev ua haujlwm dua tshiab kom txo cov nqi, thiab siv los kho qhov puas tsuaj hauv zos ntawm PCB (xws li luam ntawv cov kab hluav taws xob) kom yooj yim rau cov txheej txheem nyuaj.

Paub txog kev tswj hwm digital thiab kev saib xyuas chaw taws teeb ntawm cov khoom siv ua haujlwm dua tshiab, ua kom cov txheej txheem zoo dua los ntawm kev tshuaj xyuas cov ntaub ntawv loj, thiab tsim kom muaj cov txheej txheem nrhiav khoom rov ua haujlwm dua tshiab los txhim kho kev tswj hwm zoo.