Iimeko eziyimfuneko zei-solder PCBiibhodi zesekethe

1.I-weldment kufuneka ibe ne-weldability elungileyo

I-solderability ebizwa ngokuba yi-solderability ibhekisela ekusebenzeni kwe-alloy ukuba izinto zetsimbi zifakwe kwi-welded kunye ne-solder ingenza ukudibanisa okulungileyo kwiqondo lokushisa elifanelekileyo. Ayizizo zonke iintsimbi ezikwazi ukuwelda kakuhle. Ezinye iintsimbi, ezifana nechromium, molybdenum, tungsten, njl., zineweldability embi kakhulu; ezinye iintsimbi, ezifana nobhedu, ubhedu, njl., zine-weldability engcono. Ngexesha le-welding, ubushushu obuphezulu bubangela ukuba ifilimu ye-oxide yenziwe kwindawo yesinyithi, echaphazela ukuthungelana kwezinto. Ukuze kuphuculwe i-solderability, i-surface tin plating, i-silver plating kunye namanye amanyathelo angasetyenziselwa ukuthintela i-oxidation yomhlaba wezinto eziphathekayo.

2. Umphezulu we-weldment kufuneka ugcinwe ucocekile

Ukuze ufezekise ukudibanisa okulungileyo kwe-solder kunye ne-weldment, i-welding surface kufuneka igcinwe icocekile. Kwanakwii-weldments ezine-weldability elungileyo, iifilimu ze-oxide kunye namabala e-oyile anobungozi bokumanzisa anokuveliswa kumphezulu we-weldment ngenxa yokugcinwa okanye ukungcoliswa. Ifilimu yokungcola kufuneka isuswe ngaphambi kwe-welding, ngaphandle koko umgangatho we-welding awukwazi ukuqinisekiswa. Iileyile zeoksidi ezithambileyo kumphezulu wesinyithi zinokususwa ngokuguquguquka. Imiphezulu yesinyithi ene-oxidation enzima kufuneka isuswe ngoomatshini okanye ngeendlela zeekhemikhali, ezifana nokukhuhla okanye ukukha.

3.Sebenzisa i-flux efanelekileyo

Umsebenzi we-flux kukususa ifilimu ye-oxide ebusweni be-weldment. Iinkqubo ze-welding ezahlukeneyo zifuna ii-fluxes ezahlukeneyo, ezifana ne-nickel-chromium alloy, insimbi engenasici, i-aluminium kunye nezinye izinto. Kunzima ukuthengisa ngaphandle kwe-flux ekhethekileyo ekhethekileyo. Xa udibanisa iimveliso ze-elektroniki ezichanekileyo ezifana neebhodi zesekethe eziprintiweyo, ukwenzela ukuba i-welding ithembeke kwaye izinzile, i-rosin-based flux idla ngokusetyenziswa. Ngokuqhelekileyo, utywala busetyenziselwa ukunyibilikisa i-rosin emanzini e-rosin.

4. I-weldment kufuneka ifudunyezwe kwiqondo lokushisa elifanelekileyo

Ngexesha le-welding, umsebenzi we-thermal energy kukunyibilikisa i-solder kunye nokutshisa into ye-welding, ukwenzela ukuba i-tin kunye ne-athomu ezikhokelayo zifumana amandla aneleyo okungena kwi-crystal lattice ebusweni besinyithi ukuba idityaniswe ukuze yenze i-alloy. Ukuba ukushisa kwe-welding kuphantsi kakhulu, kuya kuba yingozi ekungeneni kwee-athomu ze-solder, okwenza kube nzima ukwenza i-alloy, kwaye kulula ukwenza i-solder yamanga. Ukuba ubushushu be-welding buphezulu kakhulu, i-solder iya kuba kwimeko engekho-eutectic, ikhawuleza ukubola kunye nesantya sokuguquguquka kwe-flux, ebangela ukuba umgangatho we-solder uhlambuluke, kwaye kwiimeko ezinzima, Inokubangela iipads kwiprinta. ibhodi yesekethe ukuwa. Yintoni ekufuneka igxininiswe kukuba kungekhona kuphela i-solder kufuneka ifudumale ukuze inyibilike, kodwa i-weldment kufuneka iphinde ifudumale kwiqondo lokushisa elinokunyibilikisa i-solder.

5. Ixesha le-welding elifanelekileyo

Ixesha le-welding libhekisela kwixesha elifunekayo ekutshintsheni umzimba kunye neekhemikhali ngexesha lenkqubo ye-welding. Iquka ixesha lokuba isinyithi sidityaniswe ukuze sifikelele kwiqondo lokushisa, ixesha lokunyibilika kwe-solder, ixesha lokuba i-flux isebenze kunye nexesha lokuba i-alloy yensimbi yenziwe. Emva kokuba ubushushu be-welding buchongiwe, ixesha elifanelekileyo le-welding kufuneka limiselwe ngokusekelwe kwimilo, indalo, kunye neempawu zeendawo eziza kuxutywa. Ukuba ixesha le-welding lide kakhulu, amacandelo okanye iinxalenye ze-welding ziya konakala lula; ukuba ixesha le-welding lifutshane kakhulu, iimfuno ze-welding aziyi kufezekiswa. Ngokubanzi, elona xesha liphezulu kwijoyinti ngalinye le-solder ukuba lidityaniswe alikho ngaphezu kwemizuzwana emi-5.