Kwesinye isikhathi kuzoba khona into embi yokucubungula ohlelweni lweUmshini we-SMT, i-tin bead ingenye yazo, ukuxazulula inkinga, kufanele siqale sazi imbangela yenkinga.I-solder beading isendaweni ye-solder paste slump noma inqubo yokucindezelwa ngaphandle kwephedi kwenzeka.Phakathireflow oveni-soldering, i-solder paste ihlukaniswa nediphozithi eyinhloko futhi ihlanganiswe nokunamathisela kwe-solder okweqile kwamanye amaphedi, noma avela ohlangothini lwengxenye yomzimba ukuze enze ubuhlalu obukhulu, noma ahlale ngaphansi kwengxenye.Ukuqedwa kobuhlalu bethini ngangokunokwenzeka ngokususa ngokuqondile indlela, ohlelweni lokukhiqiza okufanele unake, kungagwenywa.Okulandelayo ukuhlaziya ukuthi yiziphi izimo ezizokhiqiza ubuhlalu be-solder:
I. Insimbi Yensimbi
1. Ukuvulwa kwemeshi yensimbi ngokuqondile ngokuhambisana nobukhulu bokuvuleka kwephedi kuzoholela entweni yobuhlalu bethayela ngesikhathi sokucutshungulwa kwesichibi.
2. Uma ubukhulu bensimbi yensimbi bukhulu kakhulu, kungenzeka futhi ukubangela ukuwa kwe-solder paste, okuzophinde kukhiqize ubuhlalu be-tin.
3. Uma ingcindezi yeumshini wokukhetha nokubekaiphezulu kakhulu, i-solder paste izokhishwa kalula kungqimba lokumelana ne-solder ngaphansi kwengxenye, futhi unamathisele we-solder uzoncibilika futhi ujikeleze ingxenye ukuze wenze ubuhlalu be-solder ngesikhathi se-oven reflow.
II.I-solder paste
1. Unamathisele we-solder ngaphandle kokucubungula ukubuyiswa kwezinga lokushisa esigabeni sokushisa kuzosaphaza isenzakalo ukukhiqiza ubuhlalu bethini.
2. Usayizi wezinhlayiyana ezincane ze-powder yensimbi ekunamathiseleni kwe-solder, indawo enkulu yendawo yonke ye-solder paste, okuholela ezingeni eliphakeme le-oxidation ye-powder ecolekile, ngakho-ke umkhuba wobuhlalu be-solder uyaqina.
3. Ukuphakama kwe-oxidation degree of metal powder ku-solder paste, kukhulu ukuphikiswa kwe-powder bonding ngesikhathi sokushisela, i-solder paste kanye ne-pad kanye nezingxenye ze-SMT akulula ukungena, okuholela ekunciphiseni kwe-solderability.
4. Inani le-flux kanye nenani le-flux esebenzayo liningi kakhulu, elizoholela ekuweni kwendawo yokunamathisela i-solder kanye nobuhlalu bethini.Lapho umsebenzi we-flux unganele, ingxenye ene-oxidized ayikwazi ukususwa ngokuphelele, okuzoholela futhi kubuhlalu be-tin ekucubunguleni i-patch processing factory.
5. Okuqukethwe kwensimbi ekucutshungulweni kwangempela kwe-tin paste ngokuvamile kungu-88% kuya ku-92% wokuqukethwe kwensimbi kanye nesilinganiso sobuningi, isilinganiso sevolumu esingaba ngu-50%, ukwandisa okuqukethwe kwensimbi kungenza ilungiselelo lensimbi yensimbi libe eduze kakhulu, ukuze kuba lula ukuhlanganisa lapho kuncibilika.
Isikhathi sokuthumela: Sep-18-2021