Ndi kupita patsogolo kwa sayansi ndi ukadaulo, mafoni am'manja, makompyuta apakompyuta ndi zinthu zina zamagetsi ndizopepuka, zazing'ono, zosunthika pazachitukuko, mu SMT processing za zida zamagetsi zikukhalanso zazing'ono, zida zakale za 0402 capacitive nawonso ndi ambiri. za 0201 kukula kuti zisinthe.Momwe mungatsimikizire mtundu wa zolumikizira zogulitsa zakhala nkhani yofunika kwambiri ya SMD yolondola kwambiri.Kulumikizana kwa solder ngati mlatho wowotcherera, khalidwe lake ndi kudalirika kumatsimikizira ubwino wa zinthu zamagetsi.Mwa kuyankhula kwina, pakupanga, khalidwe la SMT potsirizira pake limasonyezedwa mu khalidwe la solder joints.
Pakali pano, mu makampani a zamagetsi, ngakhale kuti kafukufuku wa solder wopanda kutsogolera wapita patsogolo kwambiri ndipo wayamba kulimbikitsa ntchito yake padziko lonse lapansi, ndipo nkhani za chilengedwe zakhala zikukhudzidwa kwambiri, kugwiritsa ntchito Sn-Pb solder alloy soft brazing technology ndi tsopano akadali waukulu kugwirizana luso madera amagetsi.
Mgwirizano wabwino wa solder uyenera kukhala mumayendedwe a moyo wa zida, zida zake zamakina ndi zamagetsi sizolephera.Mawonekedwe ake amawonetsedwa motere:
(1) Malo athunthu ndi osalala onyezimira.
(2) Kuchuluka koyenera kwa solder ndi solder kuti kuphimba kwathunthu mapepala ndi mayendedwe a magawo ogulitsidwa, kutalika kwa chigawocho kumakhala kochepa.
(3) kunyowa bwino;m'mphepete mwa soldering mfundo ayenera kukhala woonda, solder ndi pedi pamwamba kunyowetsa ngodya 300 kapena zochepa ndi zabwino, pazipita si upambana 600.
SMT pokonza mawonekedwe owunika:
(1) kaya zigawozo zikusowa.
(2) Kaya zigawozo zayikidwa molakwika.
(3) Palibe dera lalifupi.
(4) kaya kuwotcherera pafupifupi;kuwotcherera pafupifupi ndi zifukwa zovuta.
I. chiweruzo cha kuwotcherera zabodza
1. Kugwiritsa ntchito zida zapadera zoyezera pa intaneti pakuwunika.
2. Zowoneka kapenaKuwunika kwa AOI.Pamene solder olowa anapeza kuti ndi ochepa kwambiri solder kunyowetsa zoipa, kapena zolumikizira solder pakati pa msoko wosweka, kapena solder pamwamba anali otukukira pansi mpira, kapena solder ndi SMD musapsompsone maphatikizidwe, etc., tiyenera kulabadira, ngakhale chodabwitsa pang'ono chobisika ngozi, ayenera yomweyo kudziwa ngati pali mavuto soldering.Chigamulo ndi: kuona ngati PCB zambiri pa malo omwewo a olowa solder ndi mavuto, monga mavuto munthu PCB, akhoza kukhala solder phala ndi zikande, pini mapindikidwe ndi zifukwa zina, monga ambiri PCB pa malo omwewo ndi mavuto, pa nthawi ino zikhoza kukhala chigawo choipa kapena vuto chifukwa pad.
II.Zomwe zimayambitsa ndi njira zothetsera kuwotcherera pafupifupi
1. Mapangidwe olakwika a pedi.Kukhalapo kwa pad-hole pad ndi cholakwika chachikulu pakupanga kwa PCB, osasowa, osagwiritsa ntchito, kudzera mu dzenje kumapangitsa kutayika kwa solder chifukwa chosakwanira solder;pad spacing, dera liyeneranso kukhala lofanana, kapena liyenera kukonzedwa posachedwa kuti lipangidwe.
2. PCB board ili ndi oxidation phenomenon, ndiye kuti, pad si yowala.Ngati chodabwitsa makutidwe ndi okosijeni, mphira angagwiritsidwe ntchito misozi wosanjikiza okusayidi, kuti maonekedwe ake owala.pcb board chinyezi, monga amaganiziridwa akhoza kuikidwa mu kuyanika uvuni kuyanika.pcb board ili ndi madontho amafuta, madontho a thukuta ndi kuipitsidwa kwina, nthawi ino kugwiritsa ntchito ethanol ya anhydrous kuyeretsa.
3. Printed solder phala PCB, solder phala ndi scraped, akusisita, kotero kuti kuchuluka kwa solder phala pa ziyangoyango zogwirizana kuchepetsa kuchuluka kwa solder, kuti solder ndi osakwanira.Iyenera kuchitidwa munthawi yake.Njira zowonjezerapo zoperekera zoperekera kapena sankhani pang'ono ndi ndodo yansungwi kuti muwonjezere.
4. SMD (zigawo zokwera pamwamba) za khalidwe losauka, kutha, okosijeni, kusinthika, zomwe zimapangitsa kuti pakhale soldering zabodza.Ichi ndi chifukwa chofala kwambiri.
Zigawo za okosijeni siziwala.Kusungunuka kwa oxide kumawonjezeka.
Panthawiyi ndi madigiri oposa mazana atatu a chitsulo cha chromium yamagetsi kuphatikizapo rosin-mtundu wa flux akhoza kuwotcherera, koma ndi madigiri oposa mazana awiri a SMT reflow soldering kuphatikizapo kugwiritsa ntchito phala losawonongeka lopanda solder lidzakhala lovuta sungunula.Chifukwa chake, SMD yokhala ndi okosijeni sayenera kugulitsidwa ndi ng'anjo yamoto.Gulani zida ziyenera kuwona ngati pali okosijeni, ndikugulanso nthawi yoti mugwiritse ntchito.Mofananamo, phala la oxidised solder silingagwiritsidwe ntchito.
Nthawi yotumiza: Aug-03-2023