Tinyegharịa ihe ọmụma metụtara oven
A na-eji reflow soldering maka mgbakọ SMT, nke bụ akụkụ bụ isi nke usoro SMT.Ọrụ ya bụ ịgbaze tapawa solder, mee ka akụkụ mgbakọ dị n'elu na PCB jikọtara ọnụ.Ọ bụrụ na enweghị ike ịchịkwa ya nke ọma, ọ ga-enwe mmetụta dị njọ na ntụkwasị obi na ndụ ọrụ nke ngwaahịa.Enwere ọtụtụ ụzọ nke ịgbado ọkụ reflow.Ụzọ ndị mbụ ewu ewu bụ infrared na gas-phase.Ugbu a, ọtụtụ ndị na-emepụta na-eji ọkụ ikuku reflow ịgbado ọkụ, na ụfọdụ elu ma ọ bụ kpọmkwem oge na-eji reflow ụzọ, dị ka ọkụ isi efere, na-acha ọcha ìhè ilekwasị anya, vetikal oven, wdg Ndị na-esonụ ga-eme ka a nkenke iwebata na-ewu ewu na-ekpo ọkụ ikuku reflow ịgbado ọkụ.
1. Ịgbado ọkụ ikuku na-ekpo ọkụ
Ugbu a, ọtụtụ n'ime ọkụ reflow ọhụrụ a na-akpọ convection ikuku na-ekpo ọkụ na-emegharị ọkụ.Ọ na-eji ihe ikuku dị n'ime na-afụ ikuku ọkụ na ma ọ bụ gburugburu efere mgbakọ.Otu uru nke ọkụ a bụ na ọ na-eji nwayọọ nwayọọ na-enye okpomọkụ na efere mgbakọ, n'agbanyeghị agba na ọdịdị nke akụkụ ahụ.Ọ bụ ezie na, n'ihi ịdị arọ dị iche iche na njupụta akụrụngwa, nnabata okpomọkụ nwere ike ịdị iche, ma ọkụ ọkụ na-amanye na-ekpo ọkụ na-eji nwayọọ nwayọọ na-ekpo ọkụ, na ọdịiche okpomọkụ dị na otu PCB adịghị iche.Tụkwasị na nke ahụ, ọkụ ọkụ ahụ nwere ike ịchịkwa oke okpomọkụ na ọnụego okpomọkụ nke ọnọdụ okpomọkụ nyere, nke na-enye mpaghara ka mma na nkwụsi ike mpaghara na usoro reflux na-achịkwa karịa.
2. Nkesa okpomọkụ na ọrụ
N'ime usoro ịgbado ọkụ na-ekpo ọkụ na-ekpo ọkụ, ihe ntanye na-eme ka ọ dị mkpa ịgafe usoro ndị a: mgbaze volatilization;mwepụ nke oxide n'elu weldment;solder tapawa agbaze, reflow na solder mado obi jụrụ, na solidification.A na-ahụkarị usoro okpomọkụ (Profaịlụ: na-ezo aka n'usoro na okpomọkụ nke nkwonkwo na-ere ahịa na PCB na-agbanwe na oge mgbe ị na-agafe n'ọkụ reflow) na-ekewa n'ime ebe a na-ekpo ọkụ, ebe nchekwa okpomọkụ, mpaghara reflow, na ebe jụrụ oyi.(lee n'elu)
① Preheating ebe: nzube nke preheating ebe bụ preheat PCB na components, nweta itule, na-ewepụ mmiri na ihe mgbaze na solder mado, otú iji gbochie solder tapawa ida na solder spatter.A ga-achịkwa ọnụ ọgụgụ ịrị elu okpomọkụ n'ime oke kwesịrị ekwesị (oke ngwa ngwa ga-emepụta ujo dị ọkụ, dị ka mgbawa nke multilayer ceramic capacitor, splashing of solder, forming solder bọọlụ na solder nkwonkwo na ezughị ezu solder na-abụghị welded mpaghara nke PCB dum. ; ngwa ngwa ga-ebelata ọrụ nke flux).N'ozuzu, oke okpomọkụ ịrị elu bụ 4 ℃ / sk, na ịrị elu ọnụego atọrọ ka 1-3 ℃ / sec, nke bụ ọkọlọtọ nke ECs bụ ihe na-erughị 3 ℃ / sk.
② Mpaghara nchekwa ọkụ (na-arụsi ọrụ ike): na-ezo aka na mpaghara site na 120 ℃ ruo 160 ℃.Ebumnuche bụ isi bụ ime ka ọnọdụ okpomọkụ nke akụkụ ọ bụla dị na PCB bụrụ otu, belata ọdịiche okpomọkụ dị ka o kwere mee, ma hụ na onye na-ere ahịa nwere ike ịkọrọ kpamkpam tupu ya eruo okpomọkụ reflow.Ka ọ na-erule njedebe nke ebe mkpuchi ahụ, a ga-ewepụ oxide na pad solder, solder paste ball, na components pin, na okpomọkụ nke bọọdụ sekit dum ga-edozi.Oge nhazi ihe dị ka 60-120 sekọnd, dabere na ọdịdị nke ihe na-ere ahịa.ECS ọkọlọtọ: 140-170 ℃, max120sk;
③ Mpaghara nlọghachi: a na-edobe okpomọkụ nke ikpo ọkụ na mpaghara a na ọkwa kachasị elu.Okpomọkụ kacha elu nke ịgbado ọkụ na-adabere na tapawa solder ejiri.A na-atụ aro ka ịgbakwunye 20-40 ℃ na ebe mgbaze nke mado solder.N'oge a, ihe na-ere ahịa na tapawa solder na-amalite ịgbaze ma na-asọba ọzọ, na-edochi mmiri mmiri na-agbanye mmiri na pad na components.Mgbe ụfọdụ, a na-ekewa mpaghara ahụ na mpaghara abụọ: mpaghara agbaze na mpaghara reflow.Ọnọdụ okpomọkụ dị mma bụ na mpaghara kpuchiri "mpaghara n'ọnụ" gafere ebe mgbaze nke ihe na-ere ahịa bụ nke kacha nta na nke symmetrical, n'ozuzu, oge dị n'elu 200 ℃ bụ 30-40 sec.Ụkpụrụ nke ECS bụ okpomọkụ kacha elu: 210-220 ℃, oge dị n'elu 200 ℃: 40 ± 3sec;
④ Mpaghara jụrụ oyi: ime ngwa ngwa dị ka o kwere mee ga-enyere aka nweta nkwonkwo solder na-egbuke egbuke na ọdịdị zuru oke na akụkụ kọntaktị dị ala.Ịdị nwayọọ nwayọọ ga-edugakwu ire ere nke mpe mpe akwa n'ime tin ahụ, na-ebute nkwonkwo isi awọ na nke siri ike, na ọbụna na-eduga n'inyocha tin na-adịghị mma na nrapado nkwonkwo na-adịghị ike.Ọnụego jụrụ oyi na-adịkarị n'ime - 4 ℃ / s, yana enwere ike ime ka ọ dị jụụ ruo ihe dịka 75 ℃.N'ozuzu, mmanye jụrụ oyi site na fan jụrụ oyi chọrọ.
3. Ihe dị iche iche na-emetụta arụmọrụ ịgbado ọkụ
Ihe gbasara teknụzụ
Welding pretreatment usoro, ọgwụgwọ ụdị, usoro, ọkpụrụkpụ, ọnụ ọgụgụ nke n'ígwé.Ma ọ na-ekpo ọkụ, bee ma ọ bụ edozi ya n'ụzọ ndị ọzọ n'oge site na ọgwụgwọ ruo na ịgbado ọkụ.
Imepụta usoro ịgbado ọkụ
Ebe ịgbado ọkụ: na-ezo aka na nha, ọdịiche, eriri ntuziaka gap (wiring): ọdịdị, conductivity thermal, ike okpomọkụ nke ihe welded: na-ezo aka na ntụziaka ịgbado ọkụ, ọnọdụ, nrụgide, njikọ njikọ, wdg.
Ọnọdụ ịgbado ọkụ
Ọ na-ezo aka na welding okpomọkụ na oge, preheating ọnọdụ, kpo oku, jụrụ ọsọ, ịgbado ọkụ mode, ebu ụdị nke okpomọkụ isi iyi (wavelength, okpomọkụ conduction ọsọ, wdg)
ihe ịgbado ọkụ
Flux: mejupụtara, itinye uche, ọrụ, ebe mgbaze, ebe esi mmiri, wdg
Solder: mejupụtara, nhazi, ọdịnaya adịghị ọcha, ebe agbaze, wdg
Isi metal: mejupụtara, Ọdịdị na thermal conductivity nke isi metal
Viscosity, kpọmkwem ike ndọda na thixotropic Njirimara nke solder mado
Ihe eji eme ihe, ụdị, igwe mkpuchi, wdg.
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NeoDen na-enye azịza ahịrị ahịrị SMT zuru ezu, gụnyere SMT reflow oven, igwe na-ere ọkụ, igwe na-eburu na ebe, igwe nbipute solder, PCB loader, PCB unloader, mgbawa mgbawa, igwe SMT AOI, igwe SMT SPI, igwe SMT X-Ray, SMT mgbakọ ahịrị akụrụngwa, PCB mmepụta Equipment SMT akụkụ mapụtara, wdg ụdị ọ bụla SMT igwe ị nwere ike chọrọ, biko kpọtụrụ anyị maka ozi ndị ọzọ:
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Oge nzipu: Mee-28-2020