Yawancin masana'antar sarrafa pcba za su gamu da mummunan al'amari, abubuwan haɗin guntu na SMT a cikin aiwatar da aikin ƙarshen ɗagawa.Wannan yanayin ya faru ne a cikin ƙananan ƙananan abubuwan da aka haɗa, musamman 0402 chip capacitors, chip resistors, ana kiran wannan al'amari a matsayin "monolithic phenomenon".
Dalilan samuwar
(1) aka gyara a duka iyakar solder manna narkewa lokaci ba aiki tare ko surface tashin hankali ne daban-daban, kamar matalauta bugu na solder manna (daya karshen yana da lahani), manna son rai, aka gyara solder karshen size ne daban-daban.Gabaɗaya koda yaushe solder manna bayan an ja ƙarshen narkewa.
(2) Ƙirar kushin: tsayin kai da kushin yana da kewayon da ya dace, gajere ko tsayi da yawa suna da haɗari ga abin abin tunawa na tsaye.
(3) Ana goge man siyar da kauri sosai kuma ana shawagi abubuwan da aka gyara bayan narkar da man ɗin ya narke.A wannan yanayin, za a iya busa abubuwan da aka haɗa da iska mai zafi don faruwar abin da ke tsaye.
(4) Saitin lanƙwasa zafin jiki: monoliths gabaɗaya suna faruwa a lokacin da haɗin gwiwar solder ya fara narkewa.Yawan zafin jiki ya tashi kusa da wurin narkewa yana da matukar muhimmanci, da hankali ya fi kyau don kawar da abin mamaki na monolith.
(5) Ɗayan ƙarshen abin da ake saida kayan yana da oxidised ko gurɓatacce kuma ba za a iya jika ba.Kula da hankali musamman ga abubuwan haɗin gwiwa tare da nau'in azurfa ɗaya a ƙarshen solder.
(6) Kushin ya gurɓace (tare da siliki, siliki, tawada mai juriya, manne da al'amuran waje, oxidized).
Hanyar samuwar:
Lokacin sake dawo da siyarwar, ana amfani da zafi zuwa sama da ƙasa na ɓangaren guntu a lokaci guda.Gabaɗaya, koyaushe shine kushin tare da mafi girman wurin fallasa wanda aka fara zafi da farko zuwa yanayin zafi sama da wurin narkewa na manna solder.Ta wannan hanyar, ƙarshen abin da mai siyar ya jika daga baya yana ƙoƙarin cire shi ta hanyar tashin hankali na saman solder a ɗayan ƙarshen.
Magani:
(1) fannonin ƙira
Madaidaicin ƙira na kushin - girman kai dole ne ya zama mai ma'ana, gwargwadon iyawa don gujewa tsayin daka ya ƙunshi gefen waje na kushin (madaidaicin) kusurwar wetting sama da 45 °.
(2) Wurin samarwa
1. diligently shafa net don tabbatar da cewa solder manna ci graphics gaba daya.
2. daidaitaccen matsayi na wuri.
3. Yi amfani da manna ba eutectic solder da kuma rage yawan zafin jiki Yunƙurin a lokacin reflow soldering (iko a karkashin 2.2 ℃ / s).
4. bakin ciki da kauri na solder manna.
(3) Abu mai shigowa
Kula da ingancin abu mai shigowa don tabbatar da cewa ingantaccen yanki na abubuwan da aka yi amfani da su shine girman guda ɗaya a ƙarshen duka (tushen samar da tashin hankali na saman).
Siffofin NeoDen IN12C Reflow Oven
1. Gina-in waldi tsarin tacewa hayaki, m tacewa na cutarwa gas, da kyau bayyanar da muhalli kariya, more a layi tare da yin amfani da high-karshen yanayi.
2.Tsarin sarrafawa yana da halaye na haɗin kai mai girma, amsawar lokaci, ƙananan rashin nasara, kulawa mai sauƙi, da dai sauransu.
3. Mai hankali, haɗawa tare da PID iko algorithm na al'ada-haɓaka tsarin kula da hankali, mai sauƙin amfani, mai ƙarfi.
4. sana'a, musamman 4-hanyar jirgin saman zafin jiki monitoring tsarin, sabõda haka, da ainihin aiki a cikin wani dace da kuma m feedback data, ko da hadaddun lantarki kayayyakin iya zama tasiri.
5. Bakin karfe na nau'in B-nau'in raga na al'ada, mai dorewa kuma mai jurewa.Amfani na dogon lokaci ba abu ne mai sauƙi na lalacewa ba
6. Kyawawan kuma yana da aikin ƙararrawa ja, rawaya da kore na ƙirar ƙira.
Lokacin aikawa: Mayu-11-2023