Kodi Zomwe Zimayambitsa Solder Beading Zomwe Zimapangidwa Panthawi Yokonza SMT?

Nthawi zina padzakhala ena osauka processing chodabwitsa mu ndondomeko yamakina a SMT, mkanda wa malata ndi imodzi mwa izo, kuti tithetse vutoli, choyamba tiyenera kudziwa chomwe chayambitsa vutoli.Solder beading ali mu solder phala slump kapena mkati kukanikiza kunja pad kumachitika.Nthawireflow uvunisoldering, phala la solder limasiyanitsidwa ndi gawo lalikulu ndikuphatikizidwa ndi phala lowonjezera la solder kuchokera ku ziwiya zina, mwina kutuluka m'mbali mwa chigawocho kupanga mikanda yayikulu, kapena kukhala pansi pa gawolo.Kuchotseratu mikanda ya malata momwe mungathere mwa kuchotsa mwachindunji njira, mukupanga kumvetsera, kungapewedwe.Zotsatirazi ndikuwunika zomwe zingapangitse solder beading:

I. Mesh yachitsulo
1. Kutsegula kwazitsulo zachitsulo molunjika malinga ndi kukula kwa pad kutsegulira kudzatsogolera ku zochitika za malata pokonza chigamba.
2. Ngati makulidwe a ukonde wachitsulo ndi wandiweyani kwambiri, ndizothekanso kuyambitsa kugwa kwa phala la solder, lomwe lidzatulutsanso mikanda ya malata.
3. Ngati kukakamizidwa kwamakina opangira ndi kukonzandi okwera kwambiri, solder phala adzakhala mosavuta extruded kwa solder kukana wosanjikiza pansi chigawo, ndi solder phala adzasungunuka ndi kuthamanga mozungulira chigawo kupanga solder mikanda pa reflow uvuni.

II.Phala la solder
1. Solder phala popanda kutentha kubwerera processing mu preheating siteji adzakhala kuwaza chodabwitsa kubala malata mikanda.
2. Zing'onozing'ono za tinthu tating'onoting'ono ta ufa wachitsulo mu solder phala, zazikulu zonse padziko lonse lapansi za solder phala, zomwe zimatsogolera ku digiri yapamwamba ya okosijeni ya ufa wabwino, kotero chodabwitsa cha mikanda ya solder chimakula.
3. Kuchuluka kwa makutidwe ndi okosijeni a ufa wachitsulo mu phala la solder, kukana kwakukulu kwa zitsulo zomangira zitsulo panthawi yowotcherera, phala la solder ndi pad ndi zigawo za SMT sizosavuta kulowa, zomwe zimapangitsa kuchepetsa kusungunuka.
4. Kuchulukirachulukira ndi kuchuluka kwa mphamvu yogwira ntchito ndizochuluka kwambiri, zomwe zingayambitse kugwa kwa phala la solder ndi mikanda ya malata.Pamene ntchito ya flux sikokwanira, gawo oxidized sangathe kuchotsedwa kwathunthu, zomwe zidzachititsanso mikanda malata pokonza chigamba processing fakitale.
5. Zitsulo zili mu processing weniweni wa malata phala zambiri 88% mpaka 92% ya okhutira zitsulo ndi misa chiŵerengero, voliyumu chiŵerengero cha pafupifupi 50%, kuwonjezera zitsulo zili kungachititse kuti zitsulo ufa dongosolo kukhala kwambiri, kotero kuti zimakhala zosavuta kuphatikiza pamene zimasungunuka.