Ambiri a pcba processing fakitale adzakumana chodabwitsa zoipa, SMT Chip zigawo zikuluzikulu mu ndondomeko Chip processing mapeto Nyamulani.Izi zachitika mu magawo ang'onoang'ono chip capacitive, makamaka 0402 chip capacitors, chip resistors, chodabwitsa ichi nthawi zambiri chimatchedwa "monolithic phenomenon".
Zifukwa mapangidwe
(1) zigawo zikuluzikulu pa malekezero onse a solder phala kusungunuka nthawi si synchronized kapena mavuto padziko ndi osiyana, monga kusindikiza osauka solder phala (mapeto amodzi ali ndi chilema), phala kukondera, zigawo zikuluzikulu solder mapeto kukula ndi osiyana.Kawirikawiri nthawi zonse phala la solder litatha kusungunuka.
(2) Mapangidwe a Pad: kutalika kwa pad kuli ndi mtundu woyenera, waufupi kwambiri kapena wautali kwambiri amatengera chodabwitsa cha chipilala choyima.
(3) Phala la solder limapukutidwa kwambiri ndipo zigawo zake zimayandama phala la solder litasungunuka.Pankhaniyi, zigawozo mosavuta kuwomberedwa ndi mpweya wotentha kuchitika chodabwitsa wa kuyimirira chipilala.
(4) Kutentha kopindika: ma monoliths nthawi zambiri amapezeka panthawi yomwe cholumikizira cha solder chimayamba kusungunuka.Kutentha kwa kutentha pafupi ndi malo osungunuka ndikofunika kwambiri, pang'onopang'ono ndi bwino kuti athetse vuto la monolith.
(5) Mmodzi wa chigawo malekezero solder ndi oxidised kapena zaipitsidwa ndipo sangathe kunyowetsedwa.Samalani kwambiri zigawo zomwe zili ndi siliva umodzi pamapeto a solder.
(6) Pad waipitsidwa (ndi silkscreen, solder resist inki, kumamatira ndi zinthu zakunja, oxidised).
Njira yopangira:
Pamene reflow soldering, kutentha kumagwiritsidwa ntchito pamwamba ndi pansi pa chigawo cha chip panthawi yomweyo.Kawirikawiri, nthawi zonse ndi pedi yomwe ili ndi malo owonekera kwambiri omwe amawotchedwa poyamba kutentha pamwamba pa malo osungunuka a solder phala.Mwa njira iyi, mapeto a gawo lomwe pambuyo pake amanyowetsedwa ndi solder amatha kukokedwa ndi kugwedezeka kwapamwamba kwa solder kumapeto kwina.
Zothetsera:
(1) mawonekedwe apangidwe
Mapangidwe oyenera a pad - kukula kofikirako kuyenera kukhala koyenera, momwe kungathekere kuti tipewe kutalika kwa pad (kuwongoka) konyowa kopitilira 45 °.
(2) Malo opangira
1. mwakhama misozi ukonde kuonetsetsa kuti solder phala mphambu zithunzi kwathunthu.
2. malo olondola oyika.
3. Gwiritsani ntchito phala la non-eutectic solder ndi kuchepetsa kutentha kwa kutentha panthawi ya reflow soldering (kuwongolera pansi pa 2.2 ℃ / s).
4. Patulani makulidwe a phala la solder.
(3) Zinthu zomwe zimalowa
Yesetsani kuyang'anitsitsa ubwino wa zinthu zomwe zikubwera kuti zitsimikizire kuti malo ogwira ntchito a zigawo zomwe zimagwiritsidwa ntchito ndizofanana pazitsulo zonse ziwiri (maziko opangira kugwedezeka kwa pamwamba).
Mawonekedwe a NeoDen IN12C Reflow Oven
1. Makina opangira kuwotcherera a fume filtration, kusefera koyenera kwa mpweya woipa, mawonekedwe okongola komanso chitetezo cha chilengedwe, chogwirizana kwambiri ndi kugwiritsa ntchito malo apamwamba kwambiri.
2.Dongosolo lowongolera lili ndi mawonekedwe a kuphatikiza kwakukulu, kuyankha kwanthawi yake, kulephera kochepa, kukonza kosavuta, etc.
3. Wanzeru, wophatikizidwa ndi PID control algorithm ya machitidwe opangidwa mwanzeru anzeru, osavuta kugwiritsa ntchito, amphamvu.
4. akatswiri, wapadera 4-njira gulu pamwamba kutentha polojekiti dongosolo, kotero kuti ntchito yeniyeni mu nthawi yake ndi mabuku deta deta, ngakhale zovuta mankhwala pakompyuta akhoza kukhala ogwira.
5. Lamba wachitsulo wosapanga dzimbiri wamtundu wa B, wokhazikika komanso wosavala.Kugwiritsa ntchito nthawi yayitali sikophweka kusokoneza
6. Wokongola ndipo ali ndi alamu yofiira, yachikasu ndi yobiriwira ya mapangidwe a chizindikiro.
Nthawi yotumiza: May-11-2023