Phau ntawv qhia kev qhia yooj yim - Yuav ua li cas rau Solder Electronic Components
Cov txheej txheem kom zoo thiab zoo ntawm cov kab laug sab yog lub neej ntawm txhua yam kev tsim thiab PCB . Yog tias koj nkag mus rau hauv hluav taws xob , koj yuav tsum paub tias cov khoom siv phom yog qhov txheej txheem siv ob txoj hauv kev siv hlau los yog hlau. Hauv PCB Manufacturing, kev sib dhos thiab kev ua haujlwm tshiab , cov hlau ua ke yuav yog cov khoom ntawm cov tshuab hluav taws xob (thru-hole lossis SMD) nrog cov tooj liab ntawm cov PCB. Cov hlau uas siv los ua ke rau cov hlau no yog cov kab uas yog thawj kauj hlau (Sn-Pb) los yog tin-silver-copper (Sn-Ag-Cu). Tin-lead solder yog hu ua cov kav hlau lead vim cov hmoov txhuas muaj nyob rau hauv nws thaum lub tshuab ci-taum-tooj-tooj yaj yog hu ua lead-free solder vim tias tsis muaj hmoov txhuas nyob hauv. Cov laug yog yaj siv los ntawm lub tshuab tshuab yoj tes lossis lub cub ci rov qab los yog lub dav hlau qub thiab lub raj yas no ces siv los khi rau ntawm PCB. Ib lub PCB los yog Daim Ntawv Cuam Tshuam Xyuas Tom Qab ua ke tom qab sib txuas ntawm cov khoom hluav taws xob hu ua PCA lossis Printed Circuit Assembly.
Qee lo lus lwm yam xws li kev siv dag zog thiab kev vuam feem ntau yog sib txuas nrog cov tsiaj txhu. Tab sis
Soldering
ib qho yuav tsum nco ntsoov tias lub plhaws, lub plhaw thiab kev siv welding zoo sib txawv. Kev siv phom sij yog siv cov tshuab ci ua ke thaum uas siv cov ziab melting-kub los ntawm cov xim hlau. Hauv vuam, lub hauv paus hlau kuj melts thaum koom tes nrog ob co hlau uas yog qhov no tsis yog qhov teeb meem nrog cov tsiaj txhu thiab lub zog.
Kev zoo ntawm cov laug thiab cov txheej txheem siv tes taw txiav txim siab lub neej thiab kev ua haujlwm ntawm cov khoom siv hluav taws xob, khoom siv lossis gadget.
Flux - Cov Hom Tshuaj thiab Cov Npe Ntawm Cov Tshuaj Flux
Flux
Flux plays lub luag haujlwm tseem ceeb hauv cov txheej txheem kev lag luam thiab tshuab hluav taws xob PCB thiab kev sib koom ua ke. Flux tshem tawm cov oxide thiab tiv thaiv oxidation ntawm hlau thiab chaw pib pab nyob rau hauv zoo dua soldering zoo. Hauv Electronics PCB Lub rooj sib txoos ua ke, flux tshem tawm cov oxide los ntawm cov leb ntawm PCB thiab oxides los ntawm cov ua rau cov khoom hauv hluav taws xob. Cov oxides yog qhov loj tshaj hauv kev ua hauj lwm hauv kev zoo thiab ua kom tshem cov oxides, ua kom muaj lub luag haujlwm tseem ceeb heev ntawm no.
Muaj peb hom Flux siv hauv Electronics:
R Hom flux - Cov pob kab mob no yog Tsis-Activated thiab siv nyob rau qhov twg muaj tsawg oxidation.
RMA Hom Tshuaj Flux - Cov no yog cov pob txha muaj roj ntsha. Cov kua nplaum no muaj ntau dua li R-Hom kua nplaum thiab siv nyob rau qhov chaw uas muaj ntau dua oxidation.
RA Hom Flux - Cov no yog Rosin Activated Flux. Cov no yog cov uas muaj zog txaus thiab siv cov chaw uas muaj oxidation ntau dhau lawm.
Qee qhov fluxes muaj yog dej-soluble. Lawv tau yaj nyob rau hauv cov dej uas tsis muaj cov pa phem. Tsis tas li muaj Tsis Muaj-Flux Flux uas yuav tsum tsis txhob tu tom qab lub txheej txheem daws teeb meem.
Hom tshuaj flux kom siv tau hauv cov phom yog nyob ntawm ntau yam xws li hom PCB kom tau muab sib dhos, hom hluav taws xob siv, hom tshuab siv lub tshuab thiab cov khoom siv thiab chaw ua haujlwm.
Looj Zog - Hom thiab Lom ntawm Laj Kab Hauv Loj
Solder yog lub neej thiab ntshav ntawm cov PCB. Qhov zoo ntawm cov laug siv siv thaum lub caij laug thiab PCB lub rooj sib txoos txiav txim siab lub neej thiab kev ua haujlwm ntawm cov tshuab hluav taws xob, khoom siv, cov khoom siv lossis lub gadget.
Solder
Muaj ntau yam sib txawv ntawm cov laug hauv qab tab sis cov tseem yog cov uas yog eutectic. Eutectic solder yog ib qho uas ua rau tiav raws nraim ntawm qhov kub ntawm 183 degree Celsius. Kev ua ke ntawm tin thiab txhuas nyob rau hauv txoj kev sib tw 63/37 yog eutectic thiab li 63/37 tin-lead solder yog hu ua eutectic solder. Cov poj niam uas tsis yog-eutectic yuav tsis hloov ntawm cov kua los ntawm cov dej hauv 183 degree Celsius. Tej zaum lawv yuav nyob twj ywm ib nrab ntawm cov kub no. Qhov sib txig nyob ze rau eutectic solder yog tin-txhuas hauv kev sib tsoo 60/40. Cov khoom fais fab rau cov tshuab hluav taws xob tau 63/37 rau xyoo. Nws yog txoj siv dav dav thoob plaws ntiaj teb.
Vim cov hlau lead muaj teeb meem rau ib puag ncig thiab tib neeg, cov European Union tau pib ua kom txwv tsis pub cov hlau lead hauv electronics. Nws tau raug txiav txim siab kom tshem tau cov hmoov txhuas los ntawm kab laug ci thiab tshuab hluav taws xob. Qhov no tau muab nce mus rau lwm daim ntawv ntawm cov kab uas hu ua "lead-free solder". Qhov no yog hu ua dawb-vim tias tsis muaj hmoov txhuas nyob hauv. Lead-free solder alloys yaj ntawm 250 ° C (482 ° F), nyob ntawm seb lawv cov khoom xyaw. Feem ntau cov hmoov txhuas tsis muaj hmoov txhuas xyaw yog tin / silver / copper nyob rau qhov ratio Sn96.5 / Ag3.0 / Cu0.5 (SAC). Lead-Free solder kuj tseem hu ua "No-Lead" Solder.
Cov ntaub ntawv ntawm lub kaus mom hlau:
Lub raj mis muaj ntau hom:
Hlau
Solder Bar
Solder Preforms
Kev Siv Tshuaj Luj
Cov Khoom Khoom Rau BGA
Hauv Cheeb Tsam
Nws muaj ob hom kev txua hluav taws xob - Muaj Zog thiab Muaj Peev Xwm .
Hauv Cheeb Tsam
Lub cev muaj zog yog cov uas tau nce lossis taw qhia. Xws li transistors, integrated circuits lossis ICs, logic rooj vag.
Passive electronic components yog cov uas tsis muaj kev nce qib lossis taw kev. Lawv kuj hu ua Cov Khoom Hluav Taws Xob lossis hluav taws xob. Xws li resistors, capacitors, diodes, Inductors.
Ntxiv dua thiab, cov cheebtsam hluav taws xob nyob hauv thru-hole ntawm SMD (Mount Mount Devices lossis Chips).
Hauv Cov Chaw Lag Luam
Txij li thaum, hluav taws xob cov tuam txhab yog cov ua txhua lub soldering thiab PCB manufacturing, lawv tsis tau ignored ntawm no. Qee cov tuam txhab hauv tshuab hluav taws xob yog: Apple , Cisco , Texas Instruments , Fujitsu , Mitsubishi Electric, TCL , Bharat Electronics Limited , Siemens , Philips .
Cov cuab yeej thiab cov cuab yeej siv rau kev siv phom
Raws li tau piav saum toj no, cov phom sij yuav ua tau li 3 txoj hauv kev:
Wave Soldering : Cov khoom ua yoj ua tau ua rau huab hwm coj ntau. Cov khoom siv thiab cov ntaub ntawv yuav tsum tau rau cov yub los yog cov tshuab yawm suab yawg, tshuab yawm suab, tshuab pleev, roj pleev xim, lub tsho tester, cov tshuaj fluxers, qhov muag plawv.
Reflow Soldering: Reflow Soldering yog ua kom muaj kev ua ntau yam thiab siv rau kev siv lub tshuab SMD rau cov PCB. Cov khoom siv thiab cov khoom siv raw rau reflow soldering yog - Reflow Cub, Reflow checker, stencil lub tshuab luam ntawv , cov tshuaj txhim khoov qe , txhuam.
Tes Tes : Siv cov phom laug tes ua qhov khoom me me thiab kho thiab ua haujlwm ntawm PCB. Cov khoom siv thiab cov khoom siv raw ua yuav tsum tau ua hauv tes yog cov kav hlau yawm hlau, cov kav hlau yawm hlau, cov hlau ci, cov tais hluav taws, lub plhaub taum ntxhuav, cov thawv ntoo, cov cua tshuab, cov cua kub, , cov khoom ntim khoom, cov hlau lead, txiav cov cuab yeej, cov khoom siv roj nplaum thiab cov nplais loj, cov khoom ci, cov nplaum nplaum, los yog cov khoom ntim, cov khoom ntim, cov khoom siv.
BGA Tshuab Loj : Lwm daim ntawv muaj hluav taws xob yog BGA lossis Pob Daim phiaj Txheej. Lawv yog cov tshwj xeeb Cheebtsam thiab xav tau tshwj xeeb soldering. Lawv tsis muaj qhov ua rau, es lawv siv cov khoom siv hauv cov khoom siv hauv qab. Vim tias cov laug lo khoom siv yuav tsum tau muab tso rau hauv qhov kev tivthaiv thiab cov laug, soldering ntawm BGA ua haujlwm nyuaj heev. BGA lub cev muaj zog yuav tsum tau BGA lub cev thiab cov kab ua haujlwm rework thiab cov khoom siv sib tshuam.
Wave Soldering
Yoj Tes Soldering Tshuab
Lub tshuab yoj tes yoj tshuab muaj peev xwm ua tau ntau hom, tsim kom muaj cov kab ua ke yoj thiab cov kab mob tsis muaj kab tshuam yawg, tiam sis txhua tus muaj tib lub tswv yim. Muaj peb qho chaw nyob hauv tej yoj tes yawg tshuab qub -
Ua Ntej Ua Ntej - No thaj tsam Preheats lub PCB ua ntej los tiv thaiv.
Fluxing zone - Qhov cheeb tsam no ua kom zoo rau lub PCB.
Cov kab mob hnyav - Qhov tseem ceeb tshaj plaws uas muaj molten solder.
Kuj muaj peev xwm ua tau ib cheeb tsam plaub qhov chaw hu ua kev ntxuav lub plhaub tom qab lub plhaws tas.
Cov txheej txheem ntawm yoj tes yoj tes taw:
Ib qho khoom ua ke yuav txav mus hla cov nroj tsuag. Cov neeg ua hauj lwm siv cov twj txuas hluav taws xob rau hauv PCB uas ceev tau mus rau pem hauv ntej ntawm qhov khoom thauj. Thaum tag nrho cov khoom nyob rau hauv qhov chaw, PCB txav mus rau lub tshuab tshuab yoj tes yoj dua los ntawm cov cheeb tsam sib txawv. Cov tsis muaj plhis rau hauv cov phom da dej ntawm cov phom sij thiab cov PCB tsiv tawm ntawm lub tshuab uas nws tau sim rau txhua qhov kev kho tau. Yog tias muaj qhov tsis raws cai, qee qhov kev ua haujlwm / kho ua haujlwm tiav yog siv tes laug.
Hloov hnyav
Reflow cub
Reflow Soldering siv SMT (Ntu Mount Technology) mus rau sab laug SMD (Deg Mount Devices) rau ntawm PCB. Nyob rau hauv Reflow soldering muaj plaub theem - preheat, thermal soak, reflow thiab txias.
Nyob rau hauv cov txheej txheem kev siv tshuaj yaj yeeb sau ua ke sau rau ntawm lub rooj sib tham ntawm lub rooj tsav xwm nyob qhov twg qhov tivthaiv yuav tsum tau siv. Kev luam tawm ntawm lub khob tshuaj yej yuav ua tau los ntawm siv lub tshuab los ntawm cov khoom siv los yog stencils. Lub Rooj Tswjhwm Saib cov koob laujkaub thiab cov qauv ntawm cov tshuaj muab tshuaj yog kis los ntawm lub qhov cub ci rov qab rau qhov chaw ntawm cov khoom coj los siv rau sab. Lub Rooj Tsav Xwm Saib Xyuas Tom Qab Tshaj Xo mam li kuaj seb puas muaj dab tsi thiab yog tias muaj kev tsis zoo, kev ua hauj lwm thiab kev kho yog siv cov cua kub cua.
Tes Tes
Tes txhais tes ua tau rau cov khoom me me lossis kev kho thiab ua haujlwm tshiab.
Tes Tes
Txhais Tes Rau Cov Thaum Cov Hauj Lwm Yuav siv cov cav hlau los yog lub chaw ua ke.
Tes tes ntawm SMD Cheeb Tsam yog ua tiav siv Cov Kub Cua Kub lossis Cov Cua Kub Ua Haujlwm Hauv Tsev. Tes tes ntawm cov thru-qhov yog ib qho yooj yim dua li piv rau tes tuav ntawm SMDs.
Cov ntsiab lus tseem ceeb kom nco ntsoov thaum lub caij hno tshuaj:
Kev siv phom sij yog ua kom sov sai sai rau cov hlau, thiab tom qab ntawd thov kom muaj dej zoo thiab lub lauj kaub rau lub pob zeb. Cov kab laug khoob ua tiav tag nrho cov khoom sib txuas ua ke ntawm cov hlau sib txuas ntawm cov khoom sib txuas ua ke ntawm qhov sib txuas ntawm cov xov hlau thiab muaj zog sib txuas ua ke ntawm cov hlau. Tshav kub yog siv nrog lub kav hlau los yog lwm yam. Cov kua nplaum yog lub tshuab ntxuav tshuaj uas npaj cov kub kub rau lub raj mis. Cov kab laug yog ib qho melting point alloy ntawm non ferrous hlau.
Nco ntsoov khaws lub hau coated nrog ib txheej nyias nyias ntawm lub khob.
Siv cov fluxes uas khov me ntsis tab sis tseem muab lub hwj sib zog sib zog ua ke.
Khaws kom kub li tsawg li sai tau thaum tswj kev kub txaus kom sai sai dua lub lauj kaub (2 mus rau 3 vib nas this max rau cov hluav taws xob).
Hloov cov lus qhia me me rau kev ua haujlwm.
Siv ib lub tswv yim nrog luv tshaj plaws kom ua tau siab tshaj plaws.
Kev Siv Tes Hauj Lwm SMD Tes:
Txoj kev 1 - PIN los ntawm tus pin Siv rau: ob lub thauv rau ob sab (0805 lub khwb & res), pitches> = 0.0315 "hauv Pob Ntawv Coj Me (Small Purpose Package), (T) QFP thiab SOT (Mini 3P).
Txoj kev 2 - Dej nyab thiab nqus Siv rau: pitches <= 0.0315="" "hauv="" pob="" ntoo="" cov="" me="" nyuam="" thiab="" (t)="">
Method 3 - Siv tshuaj yaj yeeb Siv rau BGA, pob yas MLF / MLA; qhov twg lub koob ntsa los yog hauv qab thiab qhov tsis cuag.
BGA lossis Pob Daim Duab Ntaus yog ib hom kev ntim rau saum npoo PCBs (qhov chaw yog qhov 'ua kom tau' los yog affixed rau ntawm lub rooj sib tham ntawm Circuit Court Circuit). Ib pob BGA tsuas zoo nkaus li ib qho khoom noj khoom haus nyias nyias ntawm cov khoom siv coj los sib txuas uas muaj qhov sib txuas rau ntawm ib lub ntsej muag xwb. Cov pob pob daim phiaj pob ntawv hu ua xws li vim nws yog ib qho tseem ceeb ntawm cov hlau hlau txhim kho cov txheej txheem nyob hauv ib daim phiaj. Cov BGA Balls no feem ntau Tin / Lead (Sn / Pb 63/37) lossis Tin / Lead / Silver (Sn / Pb / Ag)
RoHS : Kev Txwv ntawm Cov Khoom Phom sij (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB) thiab polybrominated diphenyl ethers (PBDE).
HNUB QUB : Khib ntawm Hluav Taws Xob thiab Khoom Siv Hluav Taws Xob.
Lead-Free Solder : Lauj kaub nrog Tsis Taug Txhuas (Pb).
Lead-Free noj ceev ceev ua ub ua no nyob thoob qab ntuj tom qab EU (European Union) Ncav siv los tua cov hmoov txhuas (Poison) los ntawm kev siv hluav taws xob los ntawm kev noj qab haus huv thiab ib puag ncig teebmeem.
Nws yuav tsis tuaj yeem tuaj lub sijhawm thaum koj xav tau kom tshem lub lauj kaub los ntawm kev sib koom tes: tejzaum yuav hloov ib qho kev tivthaiv lossis kho kev sib tsoo. Txoj hauv kev li ib txwm yog siv lub tshuab tso tawm desoldering.
NeoDen muab tag nrho cov smt kev sib txuas daws teeb meem, xws li SMT reflow qhov cub, yoj tes laug tshuab , de laim cov tshuab luam ntawv , PCB loader , PCB unloader , nti mounter , SMT AOI tshuab , SMT SPI tshuab , SMT X-hluav taws xob tshuab, SMT los ua ke kab khoom siv, khoom siv PCB smt spare yam thiab lwm yam SMT cov cav koj xav tau, thov hu rau peb paub ntxiv:
Hangzhou NeoDen Technology Co., Ltd
Ntxiv: Lub Tsev 3, Diaoyu Industrial thiab Technology Park, No.8-2, Keji Avenue, District of Yuhang, Hangzhou , Suav teb
Tiv tauj peb: Steven Xiao
E-mail: steven@neodentech.com
Xov tooj: 86-18167133317
Skpe : toner_cartridge