- Kutheni kufuneka wenze ipaneli?
Emva koyilo lwePCB, i-SMT kufuneka ifakwe kumgca wokuhlanganisa ukuze uncamathisele amacandelo. Ngokweemfuno zokucubungula umgca wendibano, yonke imveliso ye-SMT yokucubungula iya kuchaza ubungakanani obufanelekileyo bebhodi yesekethe. Ngokomzekelo, ukuba ubungakanani buncinci okanye bukhulu kakhulu, ukulungiswa kwe-pcb kumgca wendibano ayikwazi ukulungiswa.
Ke ukuba ubungakanani bePCB yethu ngokwayo buncinci kunobungakanani obuchazwe ngumzi-mveliso? Oko kuthetha ukuba kufuneka sidibanise iibhodi zeesekethe, iibhodi zeesekethe ezininzi zibe yinto enye.Zombini i-high-speed mounter kunye ne-wave soldering inokuphucula kakhulu ukusebenza kakuhle.
2.Iphaneli uMzobo
1) Ubungakanani benkcazo
A. Ukuze kuququzelelwe ukusetyenzwa, i-veneer edge ye-voids okanye inkqubo kufuneka ibe yi-R chamfering, ijikelezwe ngokubanzi Φ ububanzi be-5, ipleyiti encinci inokulungiswa.
B. I-PCB enobungakanani bebhodi enye ngaphantsi kwe-100mm×70mm iya kuhlanganiswa
2) Imilo engaqhelekanga yePCB
I-PCB enemilo engaqhelekanga kwaye akukho bhodi yephaneli kufuneka idityaniswe nomtya wesixhobo. Ukuba kukho umngxuma kwi-PCB enkulu okanye elingana ne-5mm × 5mm, umngxuma kufuneka ugqitywe kuqala kuyilo lokuthintela ukuguqulwa kwe-mantineer kunye nepleyiti ngexesha le-welding. Indawo egqityiweyo kunye neyokuqala yePCB kufuneka idityaniswe ngamanqaku aliqela kwicala elinye kwaye isuswe emva kokuthengiswa kwamaza.
Xa uqhakamshelwano phakathi komgca wesixhobo kunye ne-PCB yi-v-shaped groove, umgama phakathi komphetho wesixhobo kunye ne-v-shaped groove ngu-≥2mm; okanye isekethe iya kulungiselelwa ngaphakathi kwe-2mm yomngxuma wesitampu.
3. Iphaneli
Isalathiso sendawo yolawulo siya kuyilwa ngokunxuseneyo nesalathiso somda wothumelo, ngaphandle kwalapho ubukhulu bungenako ukuhlangabezana neemfuno zobukhulu obungasentla bephaneli. imigca yomngxuma isitampu ingaphantsi okanye ilingana no-3 (ngaphandle kweebhodi ezinde nezibhityileyo ezingatshatanga).
Kwibhodi enemilo ekhethekileyo, qaphela uxhulumaniso phakathi kwebhodi ephantsi kunye nebhodi ephantsi, zama ukwenza uxhulumaniso lwesinyathelo ngasinye sihlukaniswe kumgca.
4.Amanye amanqaku e-PCB panel
Ngokubanzi, imveliso ye-PCB iya kuqhuba into ebizwa ngokuba yi-Panelization operation ukwandisa ukusebenza kakuhle kwemveliso yomgca wokuvelisa we-SMT. Zeziphi iinkcukacha ekufuneka ziqwalaselwe kwindibano PCB? Nceda ujonge ezo zingezantsi:
I-1) Isakhelo sangaphandle (i-clamping edge) yephaneli ye-PCB iya kuyilwa kwi-loop evaliweyo ukuqinisekisa ukuba ipaneli ye-PCB ayisayi kuguqulwa xa igxininiswe kwi-fixture.
2) Imilo yephaneli yePCB kufuneka isikwere ngokusondeleyo kangangoko kunokwenzeka, kucetyiswa ukuba kusetyenziswe 2×2, 3×3,……iphaneli, kodwa akukho yenza ibhodi eyahlukileyo ( yin-yang).
3) Ububanzi bobukhulu bePaneli ≤260mm (umgca weSIEMENS) okanye ≤300mm (umgca weFUJI). Ukuba kufuneka unikezelo oluzenzekelayo, ububanzi x ubude ≤125mm×180mm kubukhulu bendawo yolawulo.
4) Ibhodi nganye encinci kwiphaneli ye-PCB iya kuba nemingxuma emithathu ubuncinane, i-3≤ umngxuma ububanzi ≤ 6mm, i-wiring okanye i-SMT ayivumelekanga ngaphakathi kwe-1mm ye-edge tooling hole.
5) Umgama ophakathi phakathi kwebhodi elincinci kufuneka ulawulwe phakathi kwe-75mm kunye ne-145mm.
6) Xa ubeka umngxuma wesixhobo sokubhekisela, kuqhelekile ukushiya indawo evulekileyo ye-welding 1.5mm enkulu malunga nomngxuma wesixhobo.
7) Akufuneki kubekho izixhobo ezinkulu okanye izixhobo eziphumayo kufuphi nendawo yokudibanisa phakathi kwesakhelo sangaphandle sepaneli kunye nepaneli yangaphakathi, naphakathi kwepaneli kunye nepaneli. Ngaphandle koko, kufuneka kubekho indawo engaphezulu kwe-0.5mm phakathi kwamacandelo kunye nomda webhodi ye-PCB ukuqinisekisa ukusebenza okuqhelekileyo kwesixhobo sokusika.
8) Imingxuma emine yezixhobo ezinobubanzi bomngxuma oyi-4mm±0.01mm yavulwa kwiimbombo zone zesakhelo sangaphandle sephaneli.Amandla omngxuma kufuneka abephakathi ukuqinisekisa ukuba awuyi kuphuka ngexesha lenkqubo ephezulu nangaphantsi. ipleyiti;Imbobo kunye nokuchaneka kwesikhundla kufuneka kube phezulu, udonga lomngxuma olugudileyo ngaphandle kwe-burr.
9) Ngokomgaqo, i-QFP enesithuba esingaphantsi kwe-0.65mm kufuneka ibekwe kwindawo yayo ye-diagonal.Iimpawu zokumisa ezisetyenziselwa i-PCB subboard yendibano ziya kusetyenziswa ngababini, zicwangciswe ngediagonal kwizinto zokumisa.
10) Amacandelo amakhulu aya kuba nezithuba zokubeka okanye imingxuma yokubeka, njenge-interface ye-I / O, i-microphone, i-battery interface, i-microswitch, i-headphone jack, i-motor, njl.