Izinto ezichaphazela umgangatho we-reflow soldering zilandelayo
1. Imiba echaphazela i-solder paste
Umgangatho we-reflow soldering uchaphazeleka kwizinto ezininzi.Eyona nto ibalulekileyo ijika lobushushu le-reflow furnace kunye neeparamitha zokubunjwa kwe-solder paste.Ngoku i-furnace ye-welding ye-reflow ephezulu yokusebenza iye yakwazi ukulawula kunye nokulungelelanisa ijika lobushushu ngokuchanekileyo.Ngokwahlukileyo, kwindlela yoxinaniso oluphezulu kunye ne-miniaturization, ukuprintwa kwe-solder paste kuye kwaba sisitshixo somgangatho wokuphinda uthengise.
Ubume be-particle ye-solder paste i-alloy powder ihambelana nomgangatho we-welding wezixhobo zokubeka izithuba ezimxinwa, kunye ne-viscosity kunye nokubunjwa kwe-solder paste kufuneka kukhethwe ngokufanelekileyo.Ukongeza, i-solder paste igcinwa ngokubanzi kwindawo yokugcina ebandayo, kwaye isigqubuthelo sinokuvulwa kuphela xa ubushushu bubuyiselwa kwiqondo lokushisa.Ingqwalasela ekhethekileyo kufuneka ihlawulwe ukuze ugweme ukudibanisa i-solder paste kunye nomphunga wamanzi ngenxa yokuhluka kweqondo lokushisa.Ukuba kuyimfuneko, xuba i-solder paste kunye nomxube.
2. Impembelelo yezixhobo ze-welding
Ngamanye amaxesha, ukungcangcazela kwebhanti yokuhambisa i-reflow welding isixhobo yenye yezinto ezichaphazela umgangatho we-welding.
3. Impembelelo yenkqubo ye-welding reflow
Emva kokuphelisa umgangatho ongaqhelekanga wenkqubo yoshicilelo lwe-solder paste kunye nenkqubo ye-SMT, inkqubo yokuthengiswa kwakhona iya kukhokelela kokungahambi kakuhle komgangatho:
① Kwi-welding ebandayo, iqondo lobushushu lokuqukuqela liphantsi okanye ixesha lokuhamba kwakhona alanele.
② Iqondo lokushisa kwindawo yokufudumeza ye-tin bead iphakama ngokukhawuleza (ngokubanzi, i-slope yokunyuka kweqondo lokushisa ingaphantsi kwe-3 degrees ngomzuzwana).
③ Ukuba ibhodi yesekethe okanye iikhomponenti zichatshazelwa kukufuma, kulula ukubangela uqhushumbo lwetoti kunye nokuvelisa inkonkxa eqhubekayo.
④ Ngokubanzi, iqondo lobushushu kwindawo yokupholisa lehla ngokukhawuleza kakhulu (ngokukodwa, ukuthambeka kweqondo lobushushu lokuhla kwe-welding yelothe kungaphantsi kwe-4 degrees ngomzuzwana).
Ixesha lokuposa: Sep-10-2020