I-Chengyuan reflow soldering zone yezinga lokushisa ihlukaniswe ikakhulukazi ezindaweni ezine zokushisa: indawo yokushisa ngaphambili, indawo yokushisa engashintshi, indawo yokunamathisela, nendawo yokupholisa.
1. Indawo yokushisa
Ukushisa kwangaphambi kwesikhathi kuyisigaba sokuqala senqubo ye-reflow soldering.Phakathi nalesi sigaba sokugeleza kabusha, wonke umhlangano webhodi lesifunda ufudumeza ngokuqhubekayo ukuya ezingeni lokushisa eliqondiwe.Inhloso eyinhloko yesigaba sokushisa ukuletha yonke inhlangano yebhodi ngokuphepha ekushiseni kwangaphambi kokugeleza kabusha.Ukushisa kuphinde kube yithuba lokususa i-solvents eguquguqukayo ku-solder paste.Ukuze isincibilikisi se-pasty sime kahle futhi ukuhlangana kufinyelele ngokuphephile emazingeni okushisa angaphambi kokugeleza kabusha, i-PCB kufanele ishisiswe ngendlela engaguquki, yomugqa.Inkomba ebalulekile yesigaba sokuqala senqubo yokugeleza kabusha yizinga lokushisa noma isikhathi serempu yezinga lokushisa.Lokhu kuvame ukukalwa ngamadigri Celsius ngesekhondi C/s.Okuguquguqukayo okuningi kungathinta lesi sibalo, okuhlanganisa: isikhathi sokucubungula okuhlosiwe, ukuguquguquka kwe-solder paste, nokucatshangelwa kwengxenye.Kubalulekile ukucabangela zonke lezi zinguquko zenqubo, kodwa ezimweni eziningi ukucatshangelwa kwezingxenye ezibucayi kubalulekile.“Izingxenye eziningi zizoqhekeka uma izinga lokushisa lishintsha ngokushesha.Izinga eliphezulu lokushintsha okushisayo okungamelana nezingxenye ezizwela kakhulu liba umthambeka omkhulu ovumelekile.”Nokho, umthamo ungalungiswa ukuze kuthuthukiswe isikhathi sokucubungula uma izici ezizwelayo ezishisayo zingasetshenziswa futhi kukhuliswe ukuphuma.Ngakho-ke, abakhiqizi abaningi banyusa le mithambeka ibe isilinganiso esiphezulu esivunyelwe emhlabeni wonke esingu-3.0°C/sec.Ngokuphambene, uma usebenzisa i-solder paste equkethe i-solvent enamandla kakhulu, ukushisa ingxenye ngokushesha kungakha kalula inqubo yokubaleka.Njengoba izincibilikisi eziguqukayo ziphuma ngaphandle, zingase zifafaze i-solder kusuka kumaphedi namabhodi.Amabhola e-solder ayinkinga enkulu yokukhipha umoya ngobudlova ngesikhathi sesigaba sokufudumala.Uma ibhodi lilethwa ekushiseni ngesikhathi sesigaba sokushisa, kufanele lingene esigabeni sokushisa esiqhubekayo noma isigaba sangaphambi kokugeleza kabusha.
2. Indawo yokushisa ehlala njalo
Indawo yokushisa egelezayo egelezayo ngokuvamile iwukuchayeka kwesekhondi elingu-60 kuya kwezingu-120 ukuze kususwe okuguquguqukayo kokunamathisela kwe-solder nokwenza kusebenze ukugeleza, lapho iqembu le-flux liqala kabusha i-redox kumalebula wengxenye namaphedi.Amazinga okushisa adlulele angabangela ukuchaphazeka noma ukubhola kwe-solder kanye ne-oxidation ye-solder unamathisele amaphedi anamathiselwe kanye namatheminali wengxenye.Futhi, uma izinga lokushisa liphansi kakhulu, i-flux ingase ingasebenzi ngokugcwele.
3. Indawo yokushisela
Izinga lokushisa eliphakeme elijwayelekile lingama-20-40 ° C ngaphezu kwe-liquidus.[1] Lo mkhawulo unqunywa ingxenye enokumelana okuphansi kwezinga lokushisa eliphezulu (ingxenye esengozini enkulu yokulimala kokushisa) ekuhlanganiseni.Umhlahlandlela ojwayelekile uwukukhipha u-5°C ezingeni lokushisa eliphezulu ingxenye entekenteke kakhulu engamelana nayo ukuze ifike ezingeni lokushisa eliphezulu lenqubo.Kubalulekile ukuqapha izinga lokushisa lenqubo ukuvimbela ukweqa lo mkhawulo.Ukwengeza, izinga lokushisa eliphezulu (ngaphezu kuka-260°C) lingalimaza ama-chips angaphakathi wezingxenye ze-SMT futhi likhuthaze ukukhula kwezinhlanganisela ze-intermetallic.Ngokuphambene, izinga lokushisa elingashisi ngokwanele lingavimbela udaka ekugelezeni futhi ngokwanele.
4. Indawo yokupholisa
Indawo yokugcina iyindawo yokupholisa ukuze upholise kancane kancane ibhodi elicutshunguliwe futhi uqinise amalunga e-solder.Ukupholisa okufanele kucindezela ukwakheka okungafuneki kwenhlanganisela ye-intermetallic noma ukushaqeka okushisayo ezingxenyeni.Amazinga okushisa ajwayelekile endaweni yokupholisa asukela ku-30-100°C.Izinga lokupholisa elingu-4°C/s ngokuvamile liyanconywa.Lena ipharamitha okufanele icatshangelwe lapho kuhlaziywa imiphumela yenqubo.
Ukuze uthole ulwazi olwengeziwe lobuchwepheshe be-reflow soldering, sicela ubuke ezinye izindatshana ze-Chengyuan Industrial Automation Equipment
Isikhathi sokuthumela: Jun-09-2023