Mitundu yambiri yazopangira zopangira zimagwiritsidwa ntchito pokonza chigamba cha SMT. tinnote ndiye yofunika kwambiri. Ubwino wa phala la malata udzakhudza mwachindunji mtundu wa kuwotcherera kwa SMT patch processing. Sankhani mitundu yosiyanasiyana ya mtedza. Ndiloleni ndikufotokozereni mwachidule gulu lodziwika bwino la tin phala:
Weld phala ndi mtundu wa zamkati kusakaniza weld ufa ndi phala -ngati kuwotcherera wothandizira (rosin, diluent, stabilizer, etc.) ndi ntchito welded. Pankhani ya kulemera, 80 ~ 90% ndi aloyi zitsulo. Pankhani ya voliyumu, zitsulo ndi solder zinali 50%.
Chithunzi 3 Ten phala granules (SEM) (mmwamba)
Chithunzi 4 Chithunzi chodziwika bwino cha chivundikiro cha ufa wa malata (pansi)
Phala la solder ndi chonyamulira cha tinthu ta ufa wa malata. Amapereka kutayika koyenera koyenda bwino komanso chinyezi kulimbikitsa kufalikira kwa kutentha kudera la SMT ndikuchepetsa kugwedezeka kwamadzi pa weld. Zosakaniza zosiyanasiyana zimagwira ntchito zosiyanasiyana:
1. Gulu molingana ndi zosakaniza za phala la malata
1. Phula lopangira kuwotcherera: lili ndi zigawo zotsogola, zomwe zimawononga chilengedwe ndi thupi la munthu, koma zowotcherera zimakhala zabwino ndipo mtengo wake ndi wotsika. Itha kugwiritsidwa ntchito pazinthu zina zamagetsi zomwe zilibe zofunikira pakuteteza chilengedwe.
2. Phula lopangidwa ndi lead-free welded: Chigawocho ndi chogwirizana ndi chilengedwe ndipo chimakhala ndi vuto laling'ono. Amagwiritsidwa ntchito pazinthu zamagetsi zamagetsi zomwe zimateteza chilengedwe. Ndikusintha kwa zofunikira zoteteza chilengedwe pachitetezo cha chilengedwe, ukadaulo wopanda lead mumakampani opanga ma SMT ukhala chizolowezi.
2. Gulu molingana ndi malo osungunuka a phala la malata
Nthawi zambiri, malo osungunuka a phala amatha kugawidwa m'magulu atatu: kutentha kwakukulu, kutentha kwapakati, ndi kutentha kochepa.
Kutentha kwakukulu komwe kumagwiritsidwa ntchito ndi SN-G-CU 305, 0307; kutentha kwapakati kuli ndi SN-BI-AG; otsika kutentha ambiri ntchito SN-BI. Mu SMT patch processing, muyenera kusankha molingana ndi zinthu zosiyanasiyana.
3. Amagawidwa molingana ndi fineness ya ufa wa malata
Malingana ndi kukula kwa tinthu tating'ono ta ufa wa malata, phala la malata likhoza kugawidwa mu pinki ya 1, 2, 3, 4, 5, ndi 6, ndipo 3, 4, ndi 5 ndizomwe zimagwiritsidwa ntchito kwambiri. Zogulitsa zolondola kwambiri, ufa wa malata uyenera kukhala wocheperako, koma ung'onoting'ono wa malata, womwe umagwirizana ndi dera la okosijeni wa ufa wa malata udzawonjezeka. Kuphatikiza apo, ufa wozungulira wa malata umathandizira kusindikiza bwino.
No. 3 Fan: Mtengo wake ndi wotsika mtengo, womwe umagwiritsidwa ntchito nthawi zambiri munjira zazikulu za SMT;
No. 4 Fan: Nthawi zambiri amagwiritsidwa ntchito pokonza tchipisi tating'onoting'ono ta IC ndi SMT;
Fan 5: Nthawi zambiri amagwiritsidwa ntchito pazinthu zowotcherera zolondola kwambiri, mafoni am'manja, mapiritsi, ndi zina zambiri, komanso zofunika kwambiri pazofunikira zapamwamba; zovuta kwambiri pokonza mankhwala a SMT patch, ndikofunika kwambiri kusankha sacotic phala. Thandizani kukonza ndondomeko ya SMT patch processing.
Nthawi yotumiza: Jun-21-2023
