1. Izidingo eziyisisekelo zenqubo ye-SMT yomklamo wesakhiwo sengxenye zimi kanje:
Ukusatshalaliswa kwezingxenye ebhodini lesifunda eliphrintiwe kufanele kube okufanayo ngangokunokwenzeka.Umthamo wokushisa we-reflow soldering wezingxenye ezinkulu zekhwalithi mkhulu, futhi ukugxila ngokweqile kulula ukubangela izinga lokushisa eliphansi lendawo futhi kuholele ekuhlanganisweni okubonakalayo.Ngesikhathi esifanayo, ukuhlelwa komfaniswano nakho kuhambisana nebhalansi yesikhungo se-gravity.Ekuvivinyweni kokudlidliza nomthelela, akulula ukulimaza izingxenye, izimbobo ezenziwe ngensimbi namaphedi e-solder.
2. Ukuqondiswa kokuqondisa kwezingxenye ebhodini lesifunda eliphrintiwe kufanele kufane ngangokunokwenzeka ezingxenyeni ezifanayo, futhi isiqondiso sesici kufanele sifane ukuze kube lula ukufakwa, ukushisela nokutholwa kwezingxenye.Uma i-electrolytic capacitor positive pole, i-diode positive pole, i-transistor single pin end, iphinikhodi yokuqala yesiqondisindlela sokuhlelwa kwesekethe edidiyelwe iyahambisana ngangokunokwenzeka.Isiqondiso sokuphrinta sazo zonke izinombolo zezingxenye siyefana.
3. Izingxenye ezinkulu kufanele zishiywe eduze kwekhanda lokushisa le-SMD rework lingasetshenziswa usayizi.
4. Izingxenye zokushisa kufanele zibe kude nezinye izingxenye ngangokunokwenzeka, ngokuvamile zibekwe ekhoneni, ibhokisi lokungena komoya.Izingxenye zokushisisa kufanele zisekelwe eminye imikhondo noma ezinye izisekelo (ezifana nosinki wokushisa) ukuze kugcinwe ibanga elithile phakathi kwezingxenye zokushisa nendawo yebhodi lesifunda ephrintiwe, nebanga elincane elingu-2mm.Izingxenye zokushisa zixhuma izingxenye zokushisa ngamabhodi wesifunda aphrintiwe kumabhodi we-multilayer.Ekuklanyeni, ama-solder ensimbi ayenziwa, futhi ekucubunguleni, i-solder isetshenziselwa ukuwaxhuma, ukuze ukushisa kukhishwe ngamabhodi wesifunda aphrintiwe.
5. Izingxenye ezizwelayo kumazinga okushisa kufanele zigcinwe kude nezingxenye ezikhiqiza ukushisa.Okufana nama-audions, ama-circuits ahlanganisiwe, ama-electrolytic capacitor nezinye izingxenye ze-plastic case, kufanele zibe kude nesitaki sebhuloho, izingxenye zamandla aphezulu, ama-radiator kanye nezimbangi zamandla aphezulu.
6. Isakhiwo sezingxenye nezingxenye ezidinga ukulungiswa noma ukushintshwa kaningi, njengama-potentiometer, amakhoyili e-inductable adjustable, ama-variable capacitor micro-switches, amashubhu omshwalense, okhiye, amapulaki nezinye izingxenye, kufanele kucabangele izidingo zesakhiwo zawo wonke umshini. , futhi uwabeke endaweni okulula ukuyilungisa nokushintsha.Uma ukulungiswa komshini, kufanele kubekwe ebhodini lesifunda eliphrintiwe ukuze kube lula ukulungiswa kwendawo;Uma ilungiswa ngaphandle komshini, indawo yayo kufanele ihambisane nendawo yeknob yokulungisa kuphaneli ye-chassis ukuvimbela ukungqubuzana phakathi kwesikhala esinezinhlangothi ezintathu kanye nesikhala esinezinhlangothi ezimbili.Isibonelo, ukuvulwa kwephaneli yenkinobho yokushintsha kufanele kufane nendawo yesikhala sokushintsha ebhodini lesekethe eliphrintiwe.
7. Imbobo engashintshi kufanele isethwe eduze kwetheminali, izingxenye zepulaki kanye nokudonsa, ingxenye emaphakathi yetheminali ende kanye nengxenye evame ukuphoqelelwa, futhi isikhala esihambisanayo kufanele sishiywe eduze kwembobo engashintshi ukuvimbela ukuguquguquka ngenxa ukwanda okushisayo.Okufana nokunwetshwa kwetheminali ende eshisayo kubi kakhulu kunebhodi lesekethe eliphrintiwe, i-wave soldering ethambekele entweni engqubuzanayo.
8. Kwezinye izingxenye nezingxenye (njengama-transformer, ama-electrolytic capacitor, ama-varistors, izitaki zamabhuloho, ama-radiator, njll.) ezinokubekezelela okukhulu nokunemba okuphansi, isikhawu phakathi kwazo nezinye izingxenye kufanele sinyuswe nge-margin ethile ngesisekelo isilungiselelo sokuqala.
9. Kunconywa ukuthi i-margin yokukhuphuka yama-electrolytic capacitor, ama-varistors, izitaki zebhuloho, ama-polyester capacitor namanye ama-capacitor akufanele ibe ngaphansi kuka-1mm, kanye nama-transformer, ama-radiator nama-resistors angaphezu kuka-5W (kuhlanganise no-5W) akufanele abe ngaphansi kuka-3mm.
10. I-electrolytic capacitor akumele ithinte izingxenye zokushisisa, njengezihluthulelo zamandla aphezulu, ama-thermistors, ama-transformer, ama-radiator, njll. Isikhawu phakathi kwe-electrolytic capacitor ne-radiator kufanele sibe ubuncane obungu-10mm, futhi isikhawu phakathi kwezinye izingxenye kanye I-radiator kufanele okungenani ibe ngu-20mm.
Isikhathi sokuthumela: Dec-09-2020