Malo otentha a Chengyuan reflow soldering amagawidwa m'zigawo zinayi zotentha: zone yotenthetsera, malo otentha okhazikika, malo ogulitsira, ndi malo ozizira.
1. Preheating zone
Preheating ndi gawo loyamba la reflow soldering process.Panthawi yobwezeretsanso, msonkhano wonse wa board board umatenthedwa mosalekeza kutengera kutentha komwe mukufuna.Cholinga chachikulu cha gawo la preheat ndikubweretsa msonkhano wonse wa board motetezeka ku pre-reflow kutentha.Preheating ndi mwayi degas zosakhazikika zosungunulira mu solder phala.Kuti pasty zosungunulira kukhetsa bwino ndi msonkhano kuti bwinobwino kufika kutentha chisanadze reflow, ndi PCB ayenera usavutike mtima mogwirizana, liniya mafashoni.Chizindikiro chofunikira cha gawo loyamba la njira yobwezeretsanso ndikutsetsereka kwa kutentha kapena nthawi yoyambira kutentha.Izi nthawi zambiri zimayezedwa madigiri Celsius pa sekondi iliyonse C/s.Zosintha zambiri zimatha kukhudza chiwerengerochi, kuphatikiza: nthawi yopangira chandamale, kusakhazikika kwa phala la solder, ndi malingaliro agawo.Ndikofunikira kuganizira zamitundu yonseyi, koma nthawi zambiri kuganizira zamagulu okhudzidwa ndikofunikira.“Zigawo zambiri zimang’ambika ngati kutentha kwasintha mofulumira kwambiri.Kuchuluka kwa kusintha kwa kutentha komwe zigawo zokhudzidwa kwambiri zimatha kupirira kumakhala malo otsetsereka kwambiri. ”Komabe, malo otsetsereka atha kusinthidwa kuti apititse patsogolo nthawi yokonza ngati zinthu zomwe zimakhudzidwa ndi kutentha sizigwiritsidwa ntchito komanso kuti ziwonjezeke.Choncho, opanga ambiri amachulukitsa otsetserekawa mpaka kufika pamlingo wovomerezeka padziko lonse wa 3.0°C/sec.Mosiyana ndi zimenezi, ngati mukugwiritsa ntchito solder phala yomwe imakhala ndi zosungunulira zamphamvu kwambiri, kutentha chigawocho mofulumira kwambiri kungapangitse njira yothawa.Monga zosungunulira zosasinthika zimatuluka, zimatha kuwaza solder kuchokera pamapadi ndi matabwa.Mipira ya solder ndiye vuto lalikulu la kutulutsa kwachiwawa panthawi yotentha.Bolodi likabweretsedwa ku kutentha panthawi ya preheat, liyenera kulowa mu gawo la kutentha kosalekeza kapena gawo la pre-reflow.
2. Kutentha kwanthawi zonse
Malo otenthetsera okhazikika nthawi zonse amakhala 60 mpaka 120 kuwonekera kwachiwiri kuti achotse zosinthika za solder phala ndi kuyambitsa kwa flux, pomwe gulu la flux limayamba redox paziwongolero ndi mapepala.Kutentha kwambiri kungayambitse kutayira kapena kuphulika kwa solder ndi makutidwe ndi okosijeni a solder phala zomata zomata ndi zigawo zigawo.Komanso, ngati kutentha kuli kotsika kwambiri, kutulutsako sikungagwire ntchito.
3. Malo owotcherera
Kutentha kwapamwamba kwambiri ndi 20-40 ° C pamwamba pa madzi.[1] Malirewa amatsimikiziridwa ndi gawo lomwe lili ndi kutentha kwapamwamba kwambiri (gawo lomwe limakhudzidwa kwambiri ndi kuwonongeka kwa kutentha) pa msonkhano.Chitsogozo chokhazikika ndikuchotsa 5 ° C kuchokera pa kutentha kwakukulu komwe gawo losalimba kwambiri lingathe kupirira kuti lifike pa kutentha kwakukulu.Ndikofunika kuyang'anira kutentha kwa ndondomeko kuti tipewe kupitirira malire.Kuonjezera apo, kutentha kwakukulu (kupitirira 260 ° C) kungawononge tchipisi chamkati cha zigawo za SMT ndikulimbikitsa kukula kwa intermetallic compounds.Mosiyana ndi zimenezi, kutentha kumene sikukutentha mokwanira kungachititse kuti thopilo lisasunthike mokwanira.
4. Malo ozizira
Malo otsiriza ndi malo ozizira kuti pang'onopang'ono aziziziritsa bolodi lokonzedwa ndikulimbitsa zolumikizira za solder.Kuzizira koyenera kumapondereza mapangidwe osafunikira a intermetallic pawiri kapena kugwedezeka kwa kutentha kwa zigawo.Kutentha kodziwika bwino m'malo ozizira kumachokera ku 30-100 ° C.Kuzizira kwa 4°C/s kumalimbikitsidwa nthawi zambiri.Ichi ndi chizindikiro choyenera kuganizira pofufuza zotsatira za ndondomekoyi.
Kuti mudziwe zambiri zaukadaulo wa reflow soldering, chonde onani zolemba zina za Chengyuan Industrial Automation Equipment
Nthawi yotumiza: Jun-09-2023