Kodi Zomwe Zimayambitsa SMT Empty Soldering ndi Improvement Countermeasures ndi Chiyani?

M'malo mwake, SMT imakhala ndi mitundu ingapo yowoneka bwino, monga solder yopanda kanthu, solder zabodza, ngakhale malata, osweka, magawo osowa, osoweka, etc., mavuto osiyanasiyana amakhalidwe ali ndi zifukwa zofanana, palinso zifukwa zosiyanasiyana, lero tikambirana. kwa inu za SMT yopanda kanthu solder ndi zifukwa ziti ndikuwongolera njira zothanirana nazo.
Kusungunula kopanda kanthu kumatanthauza kuti zigawo, makamaka zokhala ndi zikhomo sizikukwera malata, otchedwa soldering opanda kanthu, soldering opanda kanthu ali ndi zifukwa zazikulu 8 zotsatirazi:

1.Zolemba zosatsegula bwino

Chifukwa pini katayanidwe ndi wandiweyani kwambiri, choncho dzenje kwambiri, laling'ono kwambiri, ngati dzenje kutsegula mwatsatanetsatane ndi zoipa zidzachititsa phala sangathe zinawukhira kapena kutayikira kusindikizidwa pang'ono, chifukwa PAD palibe phala, soldering pambuyo maonekedwe a. opanda kanthu solder.

Yankho: stencil yolondola yotseguka

2. Zochita za solder phala ndizochepa

Solder phala lokha vuto ntchito ndi ofooka, solder phala si kophweka otentha kusungunuka

Yankho: Bwezerani phala la solder

3. Kuthamanga kwa scraper ndikokwera kwambiri

Solder phala kuti kutayikira kusindikizidwa ❖ kuyanika pa pcb ziyangoyango, kufunika scraper mmbuyo ndi mtsogolo kukapala kachiwiri, ngati scraper kuthamanga ndi liwiro, solder phala kutayikira adzakhala pang'ono kwambiri, chifukwa chopanda kanthu solder.

Yankho: sinthani kuthamanga ndi liwiro la scraper

4. chigawo zikhomo warp deformation

Zikhomo zina zimakhala zopindika kapena zopunduka podutsa, zomwe zimapangitsa kuti phala lotentha lisungunuke silingakwere malata, zomwe zimapangitsa solder yopanda kanthu.

Yankho: yesani musanagwiritse ntchito ndiyeno mugwiritse ntchito

5. Zonyansa kapena oxidized pcb mkuwa zojambulazo

Chojambula chamkuwa cha pcb chimakhala chodetsedwa kapena chokhala ndi okosijeni, zomwe zimapangitsa kuti pini ikhale yosakwawa, zomwe zimatsogolera ku soldering yopanda kanthu.

Countermeasures: pcb iyenera kugwiritsidwa ntchito posachedwa mutatsegula, ndipo iyenera kuphikidwa ndikuwunikiridwa musanagwiritse ntchito.

6. Makina opangira zitsulo preheat zone ikutentha kwambiri

Reflow soldering preheating zone imatenthetsa mwachangu kwambiri, zomwe zimapangitsa kuti phala la solder lisungunuke m'malo otentha ndi kutenthetsa.

Njira zothetsera mavuto: khazikitsani kutentha kwa ng'anjo yoyenera

7. makina a SMTchigawo kuyika kuchepetsa

Chifukwa malo a pini ndi owundana kwambiri, makina ena oyika makina sangathe kufika, zomwe zimapangitsa kuti akhazikike, osati kuyika pini ku pad yomwe mwasankha.

Njira zothetsera mavuto: gulani chokwera chokwera kwambiri

8. Solder phala yosindikizira offset

Makina osindikizira a solder paste akhoza kukhala chifukwa cha stencil, komanso akhoza kukhala mbale yachitsulo yotayirira.

Yankho: sinthani makina osindikizira a solder, sinthani mawonekedwe a Table table track kuti musinthe.

Kufotokozera kwaNeoDen reflow uvuni IN6

Kuwongolera kwanzeru ndi sensor yotentha kwambiri, kutentha kumatha kukhazikika mkati mwa + 0.2 ℃.

Chotenthetsera chotenthetsera choyambira cha aluminiyamu chotenthetsera m'malo mwa chitoliro chotenthetsera, zonse zopulumutsa mphamvu komanso zogwira mtima kwambiri, komanso kusiyana kwa kutentha kwapang'onopang'ono kumakhala kosakwana 2 ℃.

Mafayilo angapo ogwira ntchito amatha kusungidwa, kusinthana mwaulere pakati pa Celsius ndi Fahrenheit, osinthika komanso osavuta kumva.

Ku Japan NSK ma bearing a injini yotentha ndi mawaya aku Swiss otentha, olimba komanso okhazikika.

Mapangidwe apamwamba a tebulo la mankhwala amachititsa kuti ikhale yankho langwiro la mizere yopangira ndi zofunikira zosiyanasiyana.Zapangidwa ndi makina opangira mkati omwe amathandiza ogwira ntchito kupereka ma soldering osavuta.

Kapangidwe kake kamagwiritsa ntchito mbale yotenthetsera ya aluminiyamu yomwe imawonjezera mphamvu zamagetsi.Dongosolo losefera utsi lamkati limapangitsa kuti zinthu ziziwayendera bwino komanso zimachepetsa kutulutsa koyipa.

Mafayilo ogwira ntchito amasungidwa mkati mwa uvuni, ndipo mawonekedwe onse a Celsius ndi Fahrenheit amapezeka kwa ogwiritsa ntchito.Ovuni imagwiritsa ntchito mphamvu ya 110/220V AC ndipo imakhala ndi kulemera kwakukulu (G1) kwa 57kg.