(1) Molao-motheo oareflow soldering
Ka lebaka la ts'ebetso e ntseng e tsoela pele ea miniaturization ea liboto tsa PCB tsa sehlahisoa sa elektroniki, likarolo tsa chip li hlahile, 'me mekhoa ea khale ea tjheseletsa ha e khone ho fihlela litlhoko.Reflow soldering e sebelisoa ha ho bokelloa liboto tsa potoloho tse kopaneng, 'me boholo ba likarolo tse bokelletsoeng le tse cheselitsoeng ke li-chip capacitor, chip inductors, mounted transistors le diode.Ka nts'etsopele ea theknoloji eohle ea SMT e ntse e tsoela pele ho phethahala, ho hlaha ha mefuta e fapaneng ea lisebelisoa tsa chip (SMC) le lisebelisoa tse ntseng li eketseha (SMD), theknoloji ea reflow soldering process le lisebelisoa e le karolo ea mahlale a ntseng a eketseha le tsona li ntlafalitsoe ka nepo. , ’me likopo tsa bona li ntse li eketseha haholoanyane.E sebelisitsoe hoo e batlang e le likarolong tsohle tsa lihlahisoa tsa elektroniki.Reflow soldering ke solder e bonolo e hlokomelang khokahanyo ea mochine le ea motlakase pakeng tsa lipheletso tsa solder tsa likarolo tse kentsoeng holim'a metsi kapa lithapo le lipampiri tsa boto tse hatisitsoeng ka ho tsosolosa solder e tletseng peista e tsamaisoang pele ho lipampiri tsa boto tse hatisitsoeng.weld.Reflow soldering ke ho lisebelisoa tsa solder ho boto ea PCB, 'me reflow soldering ke ho beha lisebelisoa holim'a metsi.Reflow soldering e itšetlehile ka ketso ea ho phalla ha moea o chesang ka manonyeletso a solder, 'me mocheso o kang oa jelly o itšoara ka tlas'a mocheso o itseng oa mocheso o phahameng oa moea ho finyella SMD soldering;kahoo e bitsoa "reflow soldering" hobane khase e potoloha mochine oa welding ho hlahisa mocheso o phahameng ho finyella morero oa soldering..
(2) Molao-motheo oareflow solderingmochine o arotsoe ka litlhaloso tse 'maloa:
A. Ha PCB e kena sebakeng se futhumatsang, solvent le khase e peista ea solder lia fetoha mouoane.Ka nako e ts'oanang, phallo ea pente ea solder e kolobisa li-pads, li-terminals le li-pin, 'me solder paste e kokobetsa, e putlame, ebe e koahela pente ea solder.poleiti ho arola liphase le likaroloana tsa phini ho tsoa ho oksijene.
B. Ha PCB e kena sebakeng sa ho boloka mocheso, PCB le likaroloana li chesoa ka ho feletseng ho thibela PCB hore e se ke ea kena ka tšohanyetso sebakeng se phahameng sa mocheso oa welding le ho senya PCB le likaroloana.
C. Ha PCB e kena sebakeng sa ho tjheseletsa, mocheso o nyoloha ka potlako e le hore setlolo sa solder se fihle boemong ba ho qhibiliha, 'me solder ea metsi e kolobisa, e qhala, e arole, kapa e khutlise liphahlo, likarolo tsa likarolo le lithapo tsa PCB ho theha manonyeletso a solder. .
D. The PCB kena sebakeng tsidifatso ho tiisa manonyeletso solder;ha reflow soldering e phethiloe.
(3) Litlhoko tsa ts'ebetso bakeng sareflow solderingmochini
Theknoloji ea reflow soldering ha e tloaelehe tšimong ea tlhahiso ea elektronike.Likarolo tsa liboto tse fapaneng tse sebelisoang lik'homphieutha tsa rona li rekisoa ho liboto tsa potoloho ka mokhoa ona.Melemo ea ts'ebetso ena ke hore mocheso o bonolo ho o laola, oxidation e ka qojoa nakong ea ts'ebetso ea soldering, 'me litšenyehelo tsa tlhahiso li bonolo ho li laola.Ho na le potoloho e futhumatsang ka har'a sesebelisoa sena, e futhumatsang khase ea naetrojene ho mocheso o phahameng o lekaneng ebe o e phetla ho boto ea potoloho moo likarolo li kopantsoeng teng, e le hore solder ka mahlakoreng ka bobeli a likarolo e qhibilihe ebe e tlamahanngoa le boardboard. .
1. Beha profil ea mocheso e utloahalang ea reflow soldering 'me u etse tlhahlobo ea nako ea sebele ea boemo ba mocheso kamehla.
2. Weld ho ea ka tataiso ea tjheseletsa ea moralo oa PCB.
3. Thibela ka thata lebanta la conveyor hore le se ke la sisinyeha nakong ea ts'ebetso ea welding.
4. Tšusumetso ea welding ea boto e hatisitsoeng e tlameha ho hlahlojoa.
5. Ho sa tsotellehe hore na ho tjheseletsa ho lekane, ho sa tsotellehe hore na bokaholimo ba motsoako oa solder bo boreleli, hore na sebopeho sa motsoako oa solder ke halofo ea khoeli, boemo ba libolo tsa solder le masala, boemo ba ho tjheseletsa ho tsoelang pele le ho tjheseletsa ho ka bang teng.Hape hlahloba phetoho ea 'mala oa holim'a PCB joalo-joalo.'Me u fetole mocheso oa mocheso ho latela liphetho tsa tlhahlobo.Boleng ba welding bo lokela ho hlahlojoa khafetsa nakong eohle ea tlhahiso.
(4) Lintlha tse amang ts'ebetso ea reflow:
1. Hangata PLCC le QFP li na le matla a maholo a mocheso ho feta likaroloana tsa discrete chip, 'me ho thata haholo ho tjheseletsa likarolo tse kholo ho feta likaroloana tse nyenyane.
2. Ka ontong ea reflow, lebanta la conveyor le boetse le fetoha mokhoa oa ho senya mocheso ha lihlahisoa tse fetisitsoeng li phetoa khafetsa.Ho phaella moo, maemo a ho senya mocheso moeling le bohareng ba karolo ea ho futhumatsa e fapane, 'me mocheso o bohale o tlaase.Ntle le litlhoko tse fapaneng, mocheso oa sebaka se tšoanang sa ho jara se boetse se fapane.
3. Tšusumetso ea lihlahisoa tse fapaneng tsa lihlahisoa.Ho lokisoa ha boemo ba mocheso oa reflow soldering ho lokela ho ela hloko hore ho pheta-pheta hantle ho ka fumanoa tlas'a ho se be le mojaro, mojaro le lintlha tse fapaneng tsa mojaro.Ntho ea mojaro e hlalosoa e le: LF = L / (L + S);moo L=bolelele ba karoloana e kopaneng le S=karohano ea karoloana e kopaneng.Ha karolo ea mojaro e phahame, ho thata le ho feta ho fumana liphetho tse ka hlahisoang hape bakeng sa ts'ebetso ea reflow.Hangata karolo e kholo ea mojaro oa ontong ea reflow e maemong a 0.5 ~ 0.9.Sena se itšetlehile ka boemo ba sehlahisoa (karolo ea soldering density, substrates e fapaneng) le mefuta e fapaneng ea libopi tsa reflow.Boiphihlelo bo sebetsang bo bohlokoa ho fumana liphetho tse ntle tsa welding le ho pheta-pheta.
(5) Melemo eareflow solderingtheknoloji ea mochini?
1) Ha ho soasoa ka theknoloji ea reflow soldering, ha ho hlokahale hore u qoelise boto ea potoloho e hatisitsoeng ka solder e entsoeng ka ho qhibilihisoa, empa ho futhumatsa sebakeng seo ho sebelisetsoa ho phethela mosebetsi oa soldering;ka hona, likarolo tse lokelang ho rekisoa li tlas'a ts'oaetso e nyenyane ea mocheso 'me li ke ke tsa bakoa ke tšenyo e feteletseng ea likaroloana.
2) Kaha theknoloji ea welding e hloka feela ho kenya solder karolong ea welding le ho e futhumatsa sebakeng sa heno ho phethela welding, mefokolo ea welding joalo ka borokho e qojoa.
3) Ts'ebetsong ea theknoloji ea reflow soldering, solder e sebelisoa hanngoe feela, 'me ha e sebelisoe hape, kahoo solder e hloekile ebile ha e na litšila, e leng se tiisang boleng ba manonyeletso a solder.
(6) Kenyelletso ea mokhoa oa ho phalla hareflow solderingmochini
Ts'ebetso ea "reflow soldering" ke boto ea holim'a marulelo, 'me mokhoa oa eona o rarahane haholo, o ka aroloa ka mefuta e' meli: ho kenngoa ka mahlakoreng a le mong le ho kenngoa ka mahlakoreng a mabeli.
A, ho hlongoa ka lehlakore le le leng: peista ea solder e kolobisitsoeng pele → patch (e arotsoe ka ho hlongoa ka letsoho le ho hlongoa ka mochini) → ho soasoa ka bosoasoi → tlhahlobo le tlhahlobo ea motlakase.
B, Ho hlomamisoa ka mahlakoreng a mabeli: Peista ea solder e ka pele ka lehlakoreng la A → SMT (e arotsoe ka ho beoa ka letsoho le ho beoa mochini ka othomathiki) → Reflow soldering → Peista ea solder e pentiloeng ka lehlakoreng la B → SMD (e arotsoe ka ho beoa ka letsoho le ho beoa ka mochini ) ho beoa) → ho soasoa ka metsi → tlhahlobo le tlhahlobo ea motlakase.
Mokhoa o bonolo oa "reflow soldering" ke "screen printing solder paste - patch - reflow soldering, eo motheo oa eona e leng ho nepahala ha khatiso ea skrine ea silika, 'me sekhahla sa tlhahiso se khethoa ke PPM ea mochine bakeng sa patch soldering, le reflow soldering ke ho laola ho phahama ha mocheso le mocheso o phahameng.le mocheso o ntseng o fokotseha. ”
(7) Sistimi ea ho lokisa lisebelisoa tsa mochini oa solder
Mosebetsi oa tlhokomelo oo re tlamehang ho o etsa ka mor'a hore reflow soldering e sebelisoe;ho seng joalo, ho thata ho boloka bophelo ba tšebeletso ea lisebelisoa.
1. Karolo e 'ngoe le e' ngoe e lokela ho hlahlojoa letsatsi le leng le le leng, 'me tlhokomelo e khethehileng e lokela ho lefshoa lebanta la conveyor, e le hore le se ke la khomarela kapa la oa.
2 Ha o lokisa mochini, phepelo ea motlakase e lokela ho tima ho thibela ts'ebetso ea motlakase kapa potoloho e khuts'oane.
3. Mochine o tlameha ho tsitsa mme o se ke oa sekamela kapa o sa tsitsa
4. Tabeng ea libaka tsa mocheso ka bomong tse emisang ho futhumatsa, qala ka ho hlahloba hore fuse e tsamaellanang e abuoa pele ho PCB pad ka ho hlakola pente.
(8) Litlhokomeliso bakeng sa mochini oa solder oa reflow
1. E le ho etsa bonnete ba tšireletseho ea botho, mosebeletsi o tlameha ho tlosa letšoao le mekhabiso, 'me matsoho ha aa lokela ho ba a hlephileng haholo.
2 Ela hloko mocheso o phahameng nakong ea ts'ebetso ho qoba tlhokomelo ea scald
3. U se ke ua ikakhela ka setotsoana seta sebaka mocheso le lebelo lareflow soldering
4. Etsa bonnete ba hore phaposi e na le moea o kenang, 'me se ntšang mosi se lokela ho lebisa ka ntle ho fensetere.
Nako ea poso: Sep-07-2022