Mpweya wabwino wa reflux uyenera kukhala wokhotakhota wa kutentha womwe ungathe kukwaniritsa kuwotcherera kwabwino kwa zigawo zosiyanasiyana za pamwamba pa bolodi la PCB kuti ziwotchedwe, ndipo cholumikizira cha solder sichimangowoneka bwino komanso chamkati mwabwino.Kuti mukwaniritse kutentha kwa mpweya wabwino wopanda kutsogolo wopanda kutsogolo, pali ubale wina ndi njira zonse zopangira zowongolera zopanda lead.Pansipa, Chengyuan Automation ilankhula za zifukwa zomwe sizimawotcherera kapena kunyowetsa mawanga opanda lead.
Mu njira yowotcherera yopanda kutsogolera, pali kusiyana kofunikira pakati pa kunyezimira kosasunthika kwa zolumikizira zopanda nsonga za lead-free reflow solder ndi chodabwitsa chomwe chimayambitsidwa ndi kusungunuka kosakwanira kwa phala la solder.Pamene bolodi yokutidwa ndi solder phala akudutsa ng'anjo ya kutentha mpweya mpweya, ngati kutentha pachimake cha solder phala sangathe anafika kapena reflux nthawi sikokwanira, ntchito ya flux sadzamasulidwa, ndi oxides ndi zinthu zina pamwamba pa solder pad ndi chigawo pini sangathe kuyeretsedwa, chifukwa kunyowetsa osauka pa lead-free reflow kuwotcherera.
Choopsa kwambiri ndi chakuti chifukwa cha kutentha kosakwanira, kutentha kwa phala la solder pamwamba pa bolodi la dera silingathe kufika kutentha komwe kumayenera kukwaniritsidwa kwa solder zitsulo mu solder phala kuti ayambe kusintha. kumabweretsa kuzizira kowotcherera komwe kumawotcherera popanda lead-free reflow.Kapena chifukwa kutentha sikokwanira, ena otsalira flux mkati solder phala sangathe volatilized, ndipo precipitates mkati solder olowa pamene utakhazikika, kuchititsa kuzimiririka kuwala kwa solder olowa.Komano, chifukwa cha osauka katundu wa solder phala lokha, ngakhale zinthu zina zogwirizana angathe kukwaniritsa zofunika za kutentha pamapindikira kutsogolera-free reflow kuwotcherera, ndi katundu makina ndi maonekedwe a solder olowa pambuyo kuwotcherera sangathe kukumana ndi zofunika ndondomeko kuwotcherera.
Nthawi yotumiza: Jan-03-2024