Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, xov tooj ntawm tes, ntsiav tshuaj khoos phis tawj thiab lwm yam khoom siv hluav taws xob yog lub teeb, me me, portable rau txoj kev loj hlob, nyob rau hauv SMT ua cov khoom siv hluav taws xob kuj tau ua me me, cov qub 0402 capacitive qhov chaw kuj tseem muaj coob tus. ntawm 0201 loj los hloov.Yuav ua li cas kom ntseeg tau tias qhov zoo ntawm cov pob qij txha tau dhau los ua qhov teeb meem tseem ceeb ntawm kev ua haujlwm siab SMD.solder pob qij txha raws li tus choj rau vuam, nws qhov zoo thiab kev ntseeg tau txiav txim siab qhov zoo ntawm cov khoom siv hluav taws xob.Hauv lwm lo lus, hauv cov txheej txheem tsim khoom, qhov zoo ntawm SMT yog qhov kawg qhia nyob rau hauv qhov zoo ntawm cov pob qij txha.
Tam sim no, hauv kev lag luam hluav taws xob, txawm hais tias kev tshawb fawb ntawm cov hlau lead-dawb solder tau ua tiav zoo thiab tau pib txhawb nws daim ntawv thov thoob ntiaj teb, thiab ib puag ncig muaj kev txhawj xeeb txog, kev siv Sn-Pb solder alloy soft brazing technology yog tam sim no tseem yog lub ntsiab kev sib txuas tshuab rau hluav taws xob circuits.
Ib qho zoo solder sib koom yuav tsum nyob rau hauv lub neej voj voog ntawm cov cuab yeej, nws cov khoom siv hluav taws xob thiab hluav taws xob tsis ua haujlwm.Nws qhov tsos yog qhia raws li:
(1) Ua tiav thiab du ci ntsa iab.
(2) Tus nqi tsim nyog ntawm solder thiab solder kom npog tag nrho cov ntaub qhwv thiab cov hlau lead ntawm cov khoom siv, qhov siab ntawm cov khoom yog nruab nrab.
(3) zoo wettability;ntug ntawm qhov taw tes soldering yuav tsum nyias, solder thiab pad nto wetting lub kaum sab xis ntawm 300 los yog tsawg dua yog qhov zoo, qhov siab tshaj plaws tsis tshaj 600.
SMT ua cov tsos tshuaj ntsuam xyuas cov ntsiab lus:
(1) seb cov khoom puas ploj lawm.
(2) Txawm hais tias cov khoom siv tsis raug.
(3) Tsis muaj luv luv Circuit Court.
(4) seb lub vuam virtual;virtual vuam yog qhov nyuaj vim li cas.
I. qhov kev txiav txim ntawm qhov cuav vuam
1. Kev siv cov khoom siv online tester tshwj xeeb rau kev tshuaj xyuas.
2. Visual los yogAOI soj ntsuam.Thaum cov pob qij txha pom tau tias me ntsis solder solder wetting tsis zoo, los yog cov pob qij txha nyob rau hauv nruab nrab ntawm cov hlab ntsha tawg, los yog cov npoo npoo yog convex pob, los yog solder thiab SMD tsis txhob hnia fusion, thiab lwm yam, peb yuav tsum xyuam xim rau, txawm hais tias qhov tshwm sim ntawm me ntsis zais kev phom sij, yuav tsum txiav txim siab tam sim ntawd seb puas muaj ib qho teeb meem ntawm soldering.Kev txiav txim siab yog: pom tias ntau PCB ntawm tib qhov chaw ntawm cov pob qij txha muaj teeb meem, xws li cov teeb meem PCB ib leeg xwb, tej zaum yuav raug muab tshuaj txhuam yog khawb, tus pin deformation thiab lwm yam, xws li hauv ntau PCB ntawm tib qhov chaw muaj teeb meem, nyob rau lub sijhawm no nws yuav yog ib qho kev tiv thaiv tsis zoo lossis teeb meem tshwm sim los ntawm lub ncoo.
II.Qhov ua rau thiab kev daws teeb meem rau lub vuam virtual
1. Kev tsim cov ntaub qhwv tsis zoo.Qhov muaj nyob ntawm cov ntaub ntawv los ntawm lub qhov yog qhov tsis zoo ntawm PCB tsim, tsis tas yuav, tsis txhob siv, los ntawm qhov yuav ua rau qhov poob ntawm solder los ntawm cov solder tsis txaus;pad spacing, cheeb tsam kuj yuav tsum yog tus qauv sib tw, lossis yuav tsum tau kho kom sai li sai tau los tsim.
2. PCB board muaj oxidation tshwm sim, uas yog, lub ncoo tsis ci.Yog tias qhov tshwm sim ntawm oxidation, cov roj hmab tuaj yeem siv los so tawm cov txheej txheem oxide, kom nws ci rov tshwm sim.pcb board ya raws, xws li xav tias yuav muab tso rau hauv qhov cub kom qhuav.pcb board muaj roj stains, hws stains thiab lwm yam kuab paug, lub sij hawm no siv anhydrous ethanol los ntxuav.
3. Cov luam ntawv solder paste PCB, solder paste yog scraped, rubbing, thiaj li hais tias tus nqi ntawm solder paste rau ntawm cov ntaub so ntswg los txo tus nqi ntawm solder, yog li ntawd lub solder yog tsis txaus.Yuav tsum tau ua kom raws sijhawm.Ntxiv txoj kev muaj dispenser los yog khaws me ntsis nrog ib tug xyoob stick los ua kom tag nrho.
4. SMD (surface-mounted Cheebtsam) tsis zoo, tas sij hawm, oxidation, deformation, ua rau tsis muaj tseeb soldering.Qhov no yog qhov laj thawj ntau dua.
Oxidised Cheebtsam tsis ci.Lub melting point ntawm oxide nce.
Lub sijhawm no nrog ntau tshaj peb puas degrees ntawm cov qib hluav taws xob chromium hlau ntxiv rau rosin-hom flux tuaj yeem welded, tab sis nrog ntau tshaj li ob puas degrees ntawm SMT reflow soldering ntxiv rau kev siv tsawg corrosive tsis huv solder paste yuav nyuaj rau. yaj.Yog li ntawd, oxidised SMD yuav tsum tsis txhob soldered nrog reflow rauv.Yuav cov khoom yuav tsum saib seb puas muaj oxidation, thiab yuav rov qab rau lub sijhawm siv.Ib yam li ntawd, oxidised solder paste tsis tuaj yeem siv.
Post lub sij hawm: Aug-03-2023