Ebhodini le-SMT, ikakhulukazi ye-BGA ne-IC enamathiselwe ezidingweni zokuqhuba kufanele isuke, imbobo yepulaki eyi-convex concave plus noma khipha 1 mil, ayikwazi ukuba nomkhawulo wembobo ethini elibomvu, imbobo yomhlahlandlela ubuhlalu base-Tibet, ukuze kuhlangatshezwane nayo. izidingo zekhasimende, ukwenza inqubo yembobo yepulaki ihlukahlukene, ukugeleza kwenqubo ende kakhulu, ukulawulwa kwenqubo kunzima, ngokuvamile ekulevelini komoya oshisayo kanye nokumelana nowoyela oluhlaza ekuhlolweni kwe-soldering;Ngemva kokuphulukiswa, ukuqhuma kwamafutha nezinye izinkinga zenzeka.Ngokwezimo zangempela zokukhiqiza, izinqubo ezahlukahlukene zembobo yepulaki ye-PCB ziyafingqwa, futhi inqubo nezinzuzo kanye nokubi kuyaqhathaniswa futhi kuchazwe kabanzi:
Qaphela: Isimiso sokusebenza sokulinganisa komoya oshisayo ukusebenzisa umoya oshisayo ukususa i-solder engaphezulu kanye nomgodi webhodi lesifunda eliphrintiwe, futhi i-solder esele imbozwe ngokulinganayo phezu kwephedi kanye nomugqa ovulekile we-solder kanye nomhlobiso we-surface seal, okukodwa. wezindlela zokwelapha ezingaphezulu zebhodi lesifunda eliphrintiwe.
I. Xhuma inqubo yembobo ngemva kokulinganisa komoya oshisayo
Ukugeleza kwenqubo: ukushisela okuvimbile kwepuleti →HAL→ imbobo yepulaki → ukwelapha.Inqubo ye-Non-plug hole yamukelwa ukukhiqizwa.Ngemva kokulinganisa komoya oshisayo, ipuleti lesikrini se-aluminium noma isikrini sikayinki sisetshenziselwa ukuqedela izimbobo zepulaki zayo yonke inqaba njengoba kudingwa amakhasimende.Uyinki wembobo yokuxhuma ungaba uyinki ozwelayo noma uyinki we-thermosetting, ukuze kuqinisekiswe ukuhambisana kombala wefilimu omanzi, uyinki wembobo yepulaki usetshenziswa kangcono ngebhodi likayinki elifanayo.Le nqubo ingaqinisekisa ukuthi ukulinganisa komoya oshisayo ngemva komgodi wokudlula akuwawisi uwoyela, kodwa kulula ukubangela ukungcoliswa kwebhodi lebhodi lepulaki lembobo kayinki, lingalingani.Ikhasimende lijwayele ukushisela i-virtual uma lisebenzisaUmshini we-SMTukukhweza (ikakhulukazi ku-BGA).Ngakho amakhasimende amaningi awayamukeli le ndlela.
II.Ukulinganisa komoya oshisayo ngaphambi kwenqubo yembobo yepulaki
2.1 Ukudluliswa kwezithombe kwenziwa ngemuva kwepulaki yembobo, ukuqina nokugaya kweshidi le-aluminium
Le nqubo yenqubo ngomshini wokumba we-CNC, ukubhoboza ukuphuma ukuze kuxhunywe ishidi le-aluminium yembobo, elenziwe ngesikrini, imbobo yepulaki, qinisekisa ukuthi imbobo yepulaki imbobo yepulaki egcwele, ipulaki yembobo yepulaki eyinki yembobo, nayo itholakala uyinki ye-thermosetting, izici zayo kufanele zibe ubulukhuni, ukuguqulwa kwe-resin shrinkage kuncane, futhi amandla okubopha udonga lwembobo mahle.Ukugeleza kwenqubo kungokulandelayo: ukwelashwa kusengaphambili → imbobo yepulaki → ipuleti lokugaya → ukudluliswa kwesithombe → ukunamathisela → ukushisela ukumelana nepuleti
Ngale ndlela kungaqinisekisa ukuqhuba kahle kwe-plug hole, ukulinganisa komoya oshisayo bekungeke kube khona uwoyela, uhlangothi lwembobo luqhuma izinkinga zekhwalithi ezinjengowoyela, kodwa imfuneko yenqubo yokuqina kwethusi elilahlwayo, yenza le mbobo yodonga lwethusi ihlangane. izinga lamakhasimende, ngakho-ke ibhodi lonke lifuna i-copper plating, futhi linesidingo esiphezulu ekusebenzeni komshini wokugaya, ukuqinisekisa ukuthi i-resin ebusweni bethusi isusa kahle, efana ne-copper surface ihlanzekile futhi ayingcolisiwe. .Izitshalo eziningi ze-PCB azinayo inqubo yethusi yokujiya yesikhathi esisodwa, futhi ukusebenza kwemishini akufiki kuzidingo, okuholela ekutheni le nqubo ingasetshenziswa ezitshalweni ze-PCB.
2.2 Vimba i-welding yendawo yebhodi lokuphrinta isikrini ngqo ngemva kwembobo yepulaki yeshidi le-aluminium
Le nqubo yenqubo isebenzisa umshini wokumba olawulayo ongu-NUMERICAL, khipha ishidi le-aluminium ukuze uxhume imbobo, elenziwe inguqulo yesikrini, efakwe embotsheni yepulaki yomshini wokunyathelisa esikrinini, ngemva kokuqedwa kwendawo yokupaka imbobo yepulaki ngeke idlule imizuzu engu-30, nesikrini esingu-36T. isikrini esiqondile sokuphrinta ibhodi lokushisela ukumelana nendawo, inqubo yenqubo yilena: ukwelashwa kwangaphambili - imbobo yepulaki - ukuphrinta kwesikrini - ukubhaka kwangaphambili - ukuchayeka - ukuthuthukiswa - ukwelapha
Ngale nqubo kungaqinisekisa ukuthi imbobo conduction uwoyela ikhava muhle, ipulaki hole flat, umbala ifilimu emanzi iyahambisana, umoya oshisayo leveling kungaqinisekisa ukuthi imbobo conduction akuyona ithini, tin ubuhlalu abufihlwa emgodini, kodwa kulula ukubangela. i-inki pad emgodini ngemva kokuphulukiswa, okuholela ekudambiseni okubi;Ngemva kokulinganisa komoya oshisayo, unqenqema lwamabhamuza embobo ephumela bese lehla amafutha.Kunzima ukusebenzisa le nqubo yokulawula ukukhiqiza, futhi kuyadingeka ukuthi onjiniyela bezinqubo bamukele izinqubo ezikhethekile nemingcele yokuqinisekisa ikhwalithi yembobo yepulaki.
2.3 Imbobo yepulaki ye-Aluminium, ukuthuthukiswa, i-precuring, i-grinding plate surface welding.
Ngomshini wokumba we-CNC, ukumba ishidi le-aluminium elidingekayo imbobo yepulaki, eyenziwe esikrinini, efakwe embotsheni yepulaki yomshini wokuphrinta esikrinini, imbobo yepulaki kufanele igcwale, izinhlangothi zombili zokuphuma zingcono, bese kuthi ngemva kokuphulukisa, indawo yokugaya ipuleti. ukwelashwa, inqubo yile: ukwelashwa ngaphambi kwesikhathi - imbobo yokuxhuma i-pre-drying - ukuthuthukiswa - ukuphulukiswa kwangaphambili - ukushisela phezulu
Njengoba ukwelapha imbobo yepulaki kule nqubo kungaqinisekisa ukuthi uwoyela awehli noma awaqhume embobeni ngemva kwe-HAL, kodwa ubuhlalu bethayela obufihlwe embobeni kanye nethini embotsheni ephumela ngemva kwe-HAL abukwazi ukuxazululeka ngokuphelele, ngakho amakhasimende amaningi awakwamukeli.
2.4 I-block welding kanye ne-plug hole kuyaqedwa kanyekanye.
Le ndlela isebenzisa isikrini se-36T (43T), esifakwe emshinini wokuphrinta wesikrini, ukusetshenziswa kwephedi noma umbhede wezinzipho, lapho kuqedwa ibhodi ngesikhathi esifanayo, yonke ipulaki yembobo, inqubo yilena: ukwelashwa ngaphambi kwesikhathi - ukuphrinta kwesikrini - ngaphambi kokoma - ukuchayeka - ukuthuthukiswa - ukwelapha.
Isikhathi senqubo sifushane, ukusetshenziswa okuphezulu kwemishini, kungaqinisekisa ngemuva kokukhishwa kwamafutha, imbobo yokuqondisa yokulinganisa umoya oshisayo ayikho ethini, kodwa ngenxa yokusebenzisa ukuphrinta kwesikrini ukuxhuma imbobo, kwimemori yembobo enenani elikhulu lomoya, lapho ukuphulukisa, ukwehla kwamandla emali komoya, ukuze aphule ukumelana Welding ulwelwesi, babe izimbobo, ngokungalingani, umoya oshisayo leveling izoqondisa imbobo inani elincane tin.
Isikhathi sokuthumela: Nov-16-2021