Kugurisha kugurisha ni intambwe yingenzi mubikorwa bya SMT.Ubushyuhe bwubushyuhe bujyanye no kugaruka ni ikintu cyingenzi kugirango ugenzure kugirango uhuze neza ibice.Ibipimo byibice bimwe na bimwe bizagira ingaruka kuburyo butaziguye ubushyuhe bwatoranijwe kuri iyo ntambwe.
Kuri convoyeur-ebyiri, imbaho zifite ibice bishya byanyuze muri zone zishyushye nubukonje bwa ziko.Izi ntambwe zagenewe kugenzura neza gushonga no gukonjesha kugurisha kugirango yuzuze abagurisha.Impinduka nyamukuru yubushyuhe bujyanye numwirondoro wo kugarura irashobora kugabanywamo ibice bine / uturere (urutonde hepfo kandi byerekanwe nyuma):
1. Shyushya
2. Gushyushya buri gihe
3. Ubushyuhe bwo hejuru
4. Gukonja
1. Agace gashyuha
Intego ya preheat zone ni uguhindura umusemburo muke wo gushonga mumashanyarazi.Ibice byingenzi bigize flux muri paste yagurishijwe harimo resin, activate, modifiseri ya viscosity na solvents.Uruhare rwumuti ni nkutwara resin, hamwe numurimo winyongera wo kwemeza ububiko buhagije bwa paste.Agace gashyuha gakeneye guhindagurika, ariko ubushyuhe buzamuka bugomba kugenzurwa.Igipimo cyinshi cyo gushyushya kirashobora gushimangira cyane ibice, bishobora kwangiza ibice cyangwa kugabanya imikorere / ubuzima.Iyindi ngaruka yo hejuru yubushyuhe bukabije nuko paste yugurisha ishobora gusenyuka igatera imiyoboro migufi.Ibi ni ukuri cyane kubagurisha paste zirimo ibintu byinshi.
2. Ubushuhe buhoraho
Igenamiterere ryubushyuhe buhoraho bugenzurwa cyane cyane mubipimo byabatanga ibicuruzwa hamwe nubushyuhe bwa PCB.Iki cyiciro gifite imirimo ibiri.Icya mbere ni ukugera ku bushyuhe bumwe kubuyobozi bwa PCB bwose.Ibi bifasha kugabanya ingaruka ziterwa nubushyuhe bwumuriro mukarere kagaruka kandi bikagabanya izindi nenge zo kugurisha nko kuzamura ibice binini.Iyindi ngaruka yingenzi yiki cyiciro nuko flux muri paste yagurishijwe itangira kubyitwaramo nabi, bikongerera ubushuhe (nimbaraga zo hejuru) hejuru yubudodo.Ibi byemeza ko umugurisha ushongeshejwe neza neza.Bitewe n'akamaro k'iki gice cyibikorwa, shiramo igihe nubushyuhe bigomba kugenzurwa neza kugirango flux isukure neza ibicuruzwa byagurishijwe kandi ko flux idakoreshwa rwose mbere yuko igera kumurongo wo kugurisha.Birakenewe kugumana flux mugihe cyicyiciro cyo kugaruka kuko byorohereza inzira yo kugurisha kandi bikarinda kongera okiside yubutaka bwagurishijwe.
3. Ubushyuhe bwo hejuru:
Agace k'ubushyuhe bwo hejuru niho huzuye gushonga no gutemba bibera aho intermetallic layer itangiye gushingwa.Nyuma yo kugera ku bushyuhe ntarengwa (hejuru ya 217 ° C), ubushyuhe butangira kugabanuka no kugwa munsi yumurongo ugaruka, nyuma uwagurishije arakomera.Iki gice cyibikorwa nacyo kigomba kugenzurwa neza kugirango ubushyuhe buzamuke hejuru no kumanuka ntibigice igice cyo guhungabana.Ubushyuhe ntarengwa ahantu hagarukira bugenwa nubushyuhe bwubushyuhe bwibice byangiza ubushyuhe kuri PCB.Igihe kiri hejuru yubushyuhe bwo hejuru kigomba kuba kigufi gishoboka kugirango tumenye neza ko ibice bisudira neza, ariko ntibirebire cyane kuburyo intermetallic igenda iba ndende.Igihe cyiza muri iyi zone ni amasegonda 30-60.
4. Agace gakonje:
Nkigice cyo kugurisha muri rusange kugurisha, akamaro ka zone ikonje akenshi birengagizwa.Uburyo bwiza bwo gukonjesha nabwo bugira uruhare runini mubisubizo byanyuma byo gusudira.Igicuruzwa cyiza kigurishwa kigomba kuba cyiza kandi kiringaniye.Niba ingaruka zo gukonjesha atari nziza, ibibazo byinshi bizabaho, nko kuzamura ibice, guhuza ibicuruzwa byijimye, kugurisha hamwe hamwe no kubyimba kwinshi.Kubwibyo, kugurisha ibicuruzwa bigomba gutanga umwirondoro mwiza wo gukonjesha, ntabwo byihuse cyangwa bitinda cyane.Biratinda cyane kandi ubona bimwe mubibazo byavuzwe haruguru bikonje.Gukonja vuba birashobora gutera ihungabana ryibice.
Muri rusange, akamaro k'intambwe yo kwerekana SMT ntishobora gusuzugurwa.Inzira igomba gucungwa neza kubisubizo byiza.
Igihe cyo kohereza: Gicurasi-30-2023