SMT m, kuma aka sani da SMT adhesive, SMT ja m, yawanci ja (kuma rawaya ko fari) manna a ko'ina rarraba tare da hardener, pigment, kaushi da sauran adhesives, yafi amfani da su gyara sassa a kan bugu allo, gaba ɗaya rarraba ta hanyar rarrabawa. ko hanyoyin buga allo na karfe.Bayan an haɗa abubuwan da aka gyara, sanya su a cikin tanda ko reflow tanderu don dumama da taurin.Bambance-bambancen da ke tsakaninsa da man da ake sayar da shi shi ne, ana warkewa bayan zafi, zafin zafinsa ya kai 150 ° C, kuma ba zai narke ba bayan ya sake dumama, wato tsarin taurin zafi na facin ba zai iya jurewa ba.Tasirin amfani da mannen SMT zai bambanta saboda yanayin warkewar thermal, abin da aka haɗa, kayan aikin da ake amfani da su, da yanayin aiki.Ya kamata a zaɓi manne bisa ga tsarin taron hukumar da'ira (PCBA, PCA) da aka buga.
Halaye, aikace-aikace da bege na SMT patch m
SMT ja manne wani nau'i ne na fili na polymer, manyan abubuwan da aka gyara su ne kayan tushe (wato, babban kayan ƙwayoyin ƙwayoyin cuta), filler, wakili na warkewa, sauran ƙari da sauransu.SMT ja manne yana da danko fluidity, zazzabi halaye, wetting halaye da sauransu.Dangane da wannan sifa ta jan man leli, a cikin samarwa, manufar yin amfani da jan manne shine sanya sassan su manne da saman PCB don hana shi fadowa.Saboda haka, faci m ne mai tsarki amfani da marasa muhimmanci tsari kayayyakin, kuma yanzu tare da ci gaba da inganta PCA zane da kuma tsari, ta hanyar rami reflow da biyu-gefe reflow waldi an gane, da PCA hawa tsari ta amfani da faci m. yana nuna yanayin ƙasa da ƙasa.
Dalilin amfani da mannen SMT
① Hana abubuwan da aka gyara daga fadowa a cikin siyar da igiyar ruwa (tsarin sayar da igiyar ruwa).Lokacin amfani da siyar da igiyar igiyar ruwa, ana gyara abubuwan da aka gyara akan allon da aka buga don hana abubuwan da aka gyara daga faɗuwa a lokacin da allon buga ya wuce ta hanyar tsagi.
② Hana ɗayan ɓangaren abubuwan da aka gyara daga faɗuwa a cikin walda mai sake gudana (tsarin walda mai fuska biyu).A cikin tsarin sake walda mai gefe biyu, don hana manyan na'urori da ke gefen da aka siyar daga faɗuwa saboda zafin narkar da mai siyar, ya kamata a yi manne SMT.
③ Hana ƙaura da tsayawa na abubuwan haɗin gwiwa (tsarin walda da sake kwarara, tsari na riga-kafi).An yi amfani da shi a cikin matakai na walƙiya na sake kwarara da matakai na riga-kafi don hana ƙaura da riser yayin hawa.
④ Alamar (kalaman solder, reflow waldi, pre-shafi).Bugu da ƙari, lokacin da aka canza allunan da aka buga da kuma abubuwan da aka gyara a cikin batches, ana amfani da mannen faci don yin alama.
An rarraba manne SMT bisa ga yanayin amfani
a) Nau'in Scraping: Ana yin girman girman ta hanyar bugu da yanayin gogewa na ragar karfe.Wannan hanya ita ce mafi yawan amfani da ita kuma ana iya amfani da ita kai tsaye a kan latsa manna.Ya kamata a ƙayyade ramukan raga na ƙarfe bisa ga nau'in sassa, aikin aikin substrate, kauri da girman da siffar ramukan.Amfaninsa shine babban sauri, babban inganci da ƙarancin farashi.
b) Nau'in rarrabawa: Ana amfani da manne akan allon da aka buga ta hanyar rarraba kayan aiki.Ana buƙatar kayan aikin rarrabawa na musamman, kuma farashin yana da yawa.Rarraba kayan aiki shine amfani da iska mai matsawa, manne ja ta hanyar keɓaɓɓiyar kai ta musamman zuwa ga substrate, girman madaidaicin manne, nawa, ta lokacin, diamita bututu mai matsa lamba da sauran sigogi don sarrafawa, injin rarraba yana da aiki mai sassauƙa. .Don sassa daban-daban, zamu iya amfani da kawunan rarraba daban-daban, saita sigogi don canzawa, Hakanan zaka iya canza siffar da adadin manne manne, don cimma sakamako, fa'idodin sun dace, sassauƙa da kwanciyar hankali.Rashin hasara yana da sauƙi don samun zanen waya da kumfa.Za mu iya daidaita sigogin aiki, gudu, lokaci, matsa lamba na iska, da zafin jiki don rage waɗannan gazawar.
SMT Patching Na Musamman CICC
Yi hankali:
1. Mafi girman zafin jiki da kuma tsawon lokacin warkewa, ƙarfin mannewa yana da ƙarfi.
2. Saboda yawan zafin jiki na manne patch zai canza tare da girman sassan sassan da kuma matsayi mai ma'ana, muna bada shawarar gano mafi dacewa yanayin hardening.
SMT faci manne ajiya
Ana iya adana shi na tsawon kwanaki 7 a dakin da zafin jiki, ajiya ya fi Yuni fiye da 5 ° C, kuma ana iya adana fiye da kwanaki 30 a 5-25 ° C.
SMT patch gum management
Saboda zafin jiki na SMT patch ja manne yana shafar, halaye na danko, ruwa, da rigar SMT, SMT patch ja manne dole ne ya sami wasu yanayi da daidaitaccen gudanarwa.
1) Manne ja dole ne ya sami takamaiman lambar kwarara, da lambobi bisa ga adadin ciyarwa, kwanan wata, da nau'ikan.
2) Ya kamata a adana jan manne a cikin firiji na 2 zuwa 8 ° C don hana halayen halayen saboda canjin yanayin zafi.
3) Maido da manne ja yana buƙatar sa'o'i 4 a zafin jiki, kuma ana amfani dashi cikin tsari na farko.
4) Don ayyukan sake cika maki, yakamata a tsara manne bututu ja manne.Ga manne jan da ba a yi amfani da shi lokaci ɗaya ba, sai a mayar da shi cikin firiji don adanawa.
5) Cika fom ɗin rikodi daidai.Dole ne a yi amfani da lokacin farfadowa da lokacin dumi.Mai amfani yana buƙatar tabbatar da cewa an gama dawo da shi kafin a iya amfani da shi.Yawancin lokaci, ba za a iya amfani da manne ja ba.
SMT faci manne ta tsarin halaye
Ƙarfin haɗin haɗi: SMT facin manne dole ne ya sami ƙarfin haɗi mai ƙarfi.Bayan an taurare, zazzabi na narke weld ba a kwasfa ba.
Rubutun batu: A halin yanzu, ana amfani da hanyar rarraba kayan bugawa, don haka ana buƙatar yin aiki kamar haka:
① Daidaita da lambobi daban-daban
② Sauƙi don saita wadatar kowane bangare
③ Kawai daidaita zuwa nau'ikan kayan maye
④ Matsakaicin kwanciyar hankali
Daidaita da na'urori masu sauri: Manne facin yanzu dole ne ya hadu da babban mai saurin rufewa da injin faci mai tsayi.Musamman, ana zana ɗigon tsayi mai tsayi ba tare da zane ba, kuma lokacin da aka shigar da manna mai sauri, allon buga yana cikin aiwatar da watsawa.Manne na tef gum dole ne tabbatar da cewa bangaren baya motsawa.
Ritting da faɗuwa: Da zarar mannen facin ya lalace a kan kushin, ba za a iya haɗa ɓangaren da haɗin wutar lantarki tare da allon buga ba.Don guje wa gurɓataccen gurɓataccen ruwa.
Maganin ƙananan zafin jiki: Lokacin ƙarfafawa, fara amfani da mafi ƙarancin welded rashin isasshen zafi mai jurewa abubuwan da aka saka don waldawa, don haka ana buƙatar yanayin taurin dole ne ya dace da ƙarancin zafin jiki da ɗan gajeren lokaci.
Daidaitawar kai: A cikin tsarin sake walda da riga-kafi, mannen facin yana da ƙarfi kuma yana gyara abubuwan da aka gyara kafin walda ɗin ya narke, don haka zai hana nutsewar meta da daidaitawar kai.Don wannan batu, masana'antun sun ƙera manne manne mai daidaitawa.
SMT facin manne matsaloli gama gari, lahani da bincike
Rashin isashen turawa
Abubuwan da ake buƙata na ƙarfin ƙarfin ƙarfin 0603 shine 1.0kg, juriya shine 1.5kg, ƙarfin ƙarfin 0805 capacitor shine 1.5kg, juriya shine 2.0kg.
Yawanci yana haifar da dalilai masu zuwa:
1. Rashin isasshen manne.
2. Babu 100% ƙarfafa colloid.
3. PCB alluna ko abubuwan da aka gurbata.
4. Colloid kanta yana da kumbura kuma bashi da ƙarfi.
Tentile mara kwanciyar hankali
Manne sirinji na 30ml yana buƙatar matsa lamba dubun dubbai don kammalawa, don haka ana buƙatar samun kyakkyawan taɓoɓin da kanta, in ba haka ba zai haifar da manne manne mara ƙarfi da ƙarancin manne.Lokacin waldawa, ɓangaren ya faɗi.Akasin haka, manne fiye da kima, musamman don ƙananan abubuwan da aka gyara, yana da sauƙin mannewa kan kushin, yana hana haɗin lantarki.
Rashin isa ko wurin zubar da ruwa
Dalilai da matakan magancewa:
1. Ba a wanke allon gidan yanar gizo don bugawa akai-akai, kuma yakamata a wanke ethanol kowane awa 8.
2. Colloid yana da najasa.
3. Buɗe ragar ba ta da ma'ana ko ƙanƙanta ko matsin iskar gas ɗin manne yayi ƙanƙanta.
4. Akwai kumfa a cikin colloid.
5. Toshe kan don toshe, kuma nan da nan tsaftace bakin roba.
6. Yanayin zafin zafin jiki na batu na tef bai isa ba, kuma zazzabi na famfo ya kamata a saita a 38 ° C.
Goge
Abin da ake kira goga shi ne cewa facin ba ya karye lokacin da dicture, kuma an haɗa facin a cikin ɗigon kai.Akwai ƙarin wayoyi, kuma an rufe manne facin akan kushin da aka buga, wanda zai haifar da rashin walda.Musamman idan girman ya yi girma, wannan al'amari yana iya faruwa lokacin da kake shafa bakinka.Matsakaicin yanki na goge gogen manne ya fi shafa shi ta babban kayan aikin resin goga da saituna na yanayin shafi:
1. Ƙara bugun ruwa don rage saurin motsi, amma zai rage gwanjon samar da ku.
2. Ƙananan ƙananan danko, babban abin taɓawa, ƙananan dabi'un zane, don haka yi ƙoƙarin zaɓar irin wannan tef.
3. Dan ƙara yawan zafin jiki na thermal regulator, da daidaita shi zuwa ƙananan danko, babban taɓawa da lalata facin manne.A wannan lokacin, ya kamata a yi la'akari da lokacin ajiya na manne patch da matsa lamba na kan famfo.
Rushewa
Rashin ruwa na mannen facin yana haifar da rushewa.Matsalar gama gari na rugujewar ita ce zai haifar da rushewa bayan an sanya shi na dogon lokaci.Idan an faɗaɗa mannen faci zuwa kushin da ke kan allon da'irar da aka buga, zai haifar da walƙiya mara kyau.Kuma ga waɗancan abubuwan da ke da manyan fil ɗin, ba zai iya tuntuɓar babban ɓangaren ɓangaren ba, wanda zai haifar da ƙarancin mannewa.Saboda haka, yana da sauƙin rushewa.Ana annabta, don haka saitin farko na murfin ma'anarsa yana da wahala.Don amsa wannan, dole ne mu zaɓi waɗanda ba su da sauƙin rugujewa.Don rugujewar da dige-dige ya haifar na dogon lokaci, za mu iya amfani da mannen faci da ƙarfafawa a cikin ɗan gajeren lokaci don guje wa.
Matsakaicin sashi
Matsakaicin ɓangarori wani mummunan al'amari ne mai saurin kamuwa da injunan faci mai sauri.Babban dalili shine:
1. Ita ce kashewa ta hanyar jagorancin XY lokacin da bugu da aka buga yana motsawa cikin sauri.Wannan al'amari yana da saurin faruwa akan sashin tare da ƙaramin yanki mai mannewa.Dalilin yana haifar da adhesion.
2. Ba ya dace da adadin manne a ƙarƙashin ɓangaren (misali: 2 manne maki a ƙasa da IC, manne manne yana da girma da ƙananan manne).Lokacin da manne ya yi zafi kuma yana ƙarfafawa, ƙarfin ba daidai ba ne, kuma ƙarshen ɗaya tare da ɗan ƙaramin manne yana da sauƙin daidaitawa.
Welding part na kololuwa
Dalilin dalilin yana da rikitarwa sosai:
1. Rashin isasshen mannewa don manne faci.
2. Kafin waldawar igiyoyin ruwa, ana buga shi kafin walda.
3. Akwai ragowar da yawa akan wasu sassa.
4. Babban tasirin zafi na colloidity ba shi da tsayayya ga yawan zafin jiki
Faci manne gauraye
Daban-daban masana'antun sun bambanta sosai a cikin sinadaran abun da ke ciki.Yin amfani da gauraye yana da wuyar haifar da mummunar illa: 1. Kafaffen wahala;2. Rashin isasshen mannewa;3. Tsananin welded sassa a kan kololuwa.
Magani shine: tsaftace raga, gogewa, da kan mai kai, waɗanda ke da sauƙin haifar da gaurayawan amfani don gujewa haɗa nau'ikan nau'ikan manne daban-daban.
Lokacin aikawa: Juni-19-2023