Yankin Chengyuan reflow soldering zafin jiki ya kasu kashi hudu zazzabi zone: preheating yankin, akai zazzabi yankin, soldering yankin, da sanyaya yankin.
1. Yankin preheating
Preheating shine mataki na farko na aikin sake kwararar kayan sayarwa.A wannan lokacin sake kwarara, gaba dayan taron hukumar da'ira na ci gaba da zafi zuwa zafin da aka yi niyya.Babban maƙasudin lokacin zafin zafi shine kawo dukkan taron hukumar lafiya zuwa zafin jiki da aka riga aka yi.Preheating ne ma damar degas da maras tabbas kaushi a cikin solder manna.Domin kaushi mai laushi ya magudana yadda ya kamata kuma taron ya isa a amince da yanayin zafi kafin sake kwarara, PCB dole ne a yi zafi cikin daidaito, salon layi.Mahimmin alamar mataki na farko na tsarin sake kwarara shine gangaren zafin jiki ko lokacin hawan zafin jiki.Ana auna wannan yawanci a cikin ma'aunin Celsius a cikin dakika C/s.Yawancin masu canji za su iya shafar wannan adadi, gami da: lokacin sarrafa manufa, rashin ƙarfi na manna siyar, da la'akari da ɓangaren.Yana da mahimmanci a yi la'akari da duk waɗannan sauye-sauyen tsari, amma a mafi yawan lokuta la'akari da abubuwa masu mahimmanci yana da mahimmanci.“Yawancin abubuwa za su fashe idan yanayin zafi ya canza da sauri.Matsakaicin adadin canjin zafi wanda mafi yawan abubuwan da ke da mahimmanci za su iya jurewa ya zama matsakaicin gangaren da aka yarda."Koyaya, ana iya daidaita gangaren don inganta lokacin sarrafawa idan ba a yi amfani da abubuwan da ke da zafi ba kuma don ƙara yawan abin da ake samarwa.Don haka, masana'antun da yawa suna haɓaka waɗannan gangara zuwa matsakaicin adadin da aka yarda da shi na 3.0°C/sec.Akasin haka, idan kuna amfani da manna mai siyar da ke ƙunshe da wani abu mai ƙarfi musamman, dumama wurin da sauri zai iya haifar da guduwa cikin sauƙi.A matsayin masu kaushi da ke fitowa daga gas, za su iya fantsama solder daga pads da alluna.ƙwallayen siyar su ne babban matsalar tashin iskar gas a lokacin lokacin dumi.Da zarar an kawo allon zuwa zafin jiki a lokacin lokacin zafin jiki, yakamata ya shiga yanayin zafin jiki akai-akai ko lokacin da aka sake fitowa.
2. Yankin zafin jiki na dindindin
Yankin zafin jiki na sake gudana yawanci shine 60 zuwa 120 na daƙiƙa don kau da ɓarna mai lalacewa da kunna juzu'i, inda ƙungiyar juzu'i ta fara redox akan jagorar abubuwan da pads.Yawan zafin jiki na iya haifar da spattering ko balling na solder da oxidation na solder manna gammaye da bangaren tasha.Hakanan, idan zafin jiki ya yi ƙasa sosai, jujjuyawar ƙila ba zata cika aiki ba.
3. Wurin walda
Yanayin zafi na gama gari shine 20-40 ° C sama da ruwa.[1] An ƙayyade wannan iyaka ta ɓangaren da ke da mafi ƙanƙanta yanayin juriya (ɓangaren da ya fi dacewa da lalacewar zafi) akan taron.Madaidaicin jagorar shine a cire 5°C daga matsakaicin zafin jiki mafi ƙanƙanta abin da zai iya jurewa don isa a matsakaicin zafin jiki.Yana da mahimmanci don saka idanu zafin jiki don hana wuce wannan iyaka.Bugu da ƙari, yanayin zafi mai girma (sama da 260 ° C) na iya lalata kwakwalwan kwamfuta na ciki na abubuwan SMT da haɓaka haɓakar mahaɗan tsaka-tsaki.Akasin haka, zafin jiki wanda bai yi zafi ba na iya hana slurry sake fitowa sosai.
4. Yanki mai sanyaya
Yanki na ƙarshe shine yanki mai sanyaya don kwantar da jikin da aka sarrafa a hankali da kuma ƙarfafa haɗin gwiwar solder.Ingantacciyar sanyaya yana hana haɓakar fili na tsaka-tsakin da ba'a so ba ko girgizar zafi zuwa abubuwan da aka gyara.Yanayin zafi na yau da kullun a cikin yankin sanyaya yana daga 30-100 ° C.Ana ba da shawarar ƙimar sanyi na 4°C/s gabaɗaya.Wannan shine ma'aunin da za a yi la'akari yayin nazarin sakamakon aikin.
Don ƙarin ilimin fasahar siyarwar sake kwarara, da fatan za a duba wasu labaran Kayayyakin Masana'antu Automation na Chengyuan
Lokacin aikawa: Juni-09-2023