Red manne shine mahaɗin polyene. Ba kamar manna mai siyarwa ba, ana warkar da shi lokacin zafi. Yanayin zafin daskarewa shine 150 ℃, a wannan lokacin, jan manne ya fara zama mai ƙarfi kai tsaye daga manna. Red manne na kayan SMT ne. Wannan labarin zai jagorance ku don fahimtar menene jan manne akan Kwamitin PCB, menene rawar jan manne akan PCB, rawar jan manne a cikin sarrafa PCB SMT aiki da SMT jan manne tsari.

Menene jan manne akan allon PCB?

A cikin tsarin SMT da DIP, don guje wa walƙiya ta gefe ɗaya, sauƙaƙe sauƙaƙe sau biyu akan yanayin wutar lantarki, a cikin abubuwan da aka haɗa na guntun murfin PCB, tsakiyar wurin tabo ja manne, ana iya siyar da shi sau ɗaya tin, ajiye tsari na bugun manna.

SMT tsarin “jan manne”? A zahiri, madaidaicin sunan yakamata ya zama tsarin “rarrabawa” na SMT. Yawancin manne ja ne, don haka galibi ana kiranta “m adon”. A zahiri, akwai kuma manne mai launin rawaya, wanda yake daidai da yadda muke yawan kiran “abin rufe fuska” a saman allon da’irar “koren fenti”.

Menene jan manne akan allon PCB? Menene aikin jan manne akan PCB?

Za mu iya gano cewa akwai tarin jan manne a tsakiyar ƙananan sassan resistors da capacitors. Wannan jan manne. An haɓaka tsarin jan manne saboda akwai abubuwan lantarki da yawa waɗanda ba za a iya canja su nan da nan daga asalin kunshin DIP zuwa kunshin SMD ba.

Kwamitin da’irar yana da rabin sassan DIP da rabin sassan SMD. Ta yaya kuke sanya sassan don a haɗa su kai tsaye zuwa allon? Babban aikin shine a tsara duk sassan DIP da SMD a gefe ɗaya na hukumar. Ana buga sassan SMD tare da manna mai siyarwa sannan a sake haɗa shi zuwa murhu. Sauran sassan DIP za a iya haɗa su gaba ɗaya ta amfani da tsarin murhun murhun murhun saboda duk fil ɗin suna fallasa a ɗayan gefen jirgin. Don haka muna buƙatar matakan walda guda biyu a farkon don samun komai walda.

Domin adana sararin shimfidar PCB, muna fatan sanya ƙarin abubuwan haɗin ciki. Sabili da haka, na’urorin SMT kuma suna buƙatar sanya su a saman ƙasa. Domin haɗa sassa zuwa allon da’irar kuma don samun allon da’irar ta cikin tanderun Wutar Wuta, don haɗa su a cikin faranti kuma kada su fada cikin tanderun Wuta mai zafi.

Domin rage tsarin fasaha, muna fatan kammala walda a lokaci guda. Ana iya siyar da matattarar rami ta cikin rami, amma yawancin plugins ɗin mu ba za su iya tsayayya da matsanancin zafi na soldering reflow ba. Sabili da haka, ba za a iya yin walda ta hanyar rami ba. Don haka, yana yiwuwa ne kawai a yi la’akari da walda ta cikin rami don manyan samfuran wasu manyan kamfanoni, saboda za su iya siyan wasu abubuwan da aka saka cikin farashi mai tsada waɗanda za su iya tsayayya da yanayin zafi.

Kuma sassan SMD na gaba ɗaya saboda an ƙera su don tsayayya da zafin jiki na reflow soldering, reflow soldering zafin jiki ya fi zafin zafin soldering na raƙuman ruwa, don haka ɓangarorin SMD da aka bari a cikin tanderun tukunyar murɗa, ko da na ɗan gajeren lokaci ma ba za su sami matsaloli ba. , amma babu yadda za a yi manna mai siyar da murfi ya sami murfin murfin murfin SMD, saboda zafin zafin murhun tiya ya zama ya fi zafin narkar da manna mai siyarwa, Wannan zai sa ɓangaren SMD ya narke kuma ya fada cikin tanderu.

Don haka, muna buƙatar gyara na’urar SMD da farko, don haka muna amfani da manne ja.

Menene rawar jan manne akan PCB?

1. Jan manne gabaɗaya yana taka rawa madaidaiciya kuma mai taimako. Soldering shine ainihin walda.

2. Siginar igiyar ruwa don hana abubuwan fashewa daga faɗuwa (tsarin siyar da igiyar ruwa). Lokacin da ake amfani da allurar raƙuman ruwa, ana gyara ɓangaren don allon da aka buga don hana sashin ya fado yayin da jirgin ke wucewa ta tsinken siyarwa.

3. Reflow waldi don hana ɗayan ɓangaren abubuwan da aka gyara su faɗi (tsarin walda na reflow mai gefe biyu). A cikin tsarin walda na reflow mai gefe biyu, don hana manyan na’urori a gefen welded daga fadowa saboda narkewar zafi na mai siyarwa, ya zama dole a sami m SMT.

4. Hana abubuwa daga ƙaura da tsayuwa (tsarin walda na reflow, tsarin riga-kafi). An yi amfani da shi a cikin tsarin walda na reflow da precoating tsari don hana ƙaura da farantin a tsaye yayin hawa.

5, alama (siyarwa ta igiyar ruwa, walda mai juyawa, precoating). Bugu da ƙari, allon da aka buga da rukunin rukunin yana canzawa, tare da m faci don alama.

Menene rawar jan manne a cikin sarrafa facin PCB?

Wakilin sarrafa faci shima aikin sarrafa facin jan manne ne, galibi ja (rawaya ko fari) manna a ko’ina rarraba hardener, pigment, solvent da sauran adhesives, galibi ana amfani da su don gyara kayan aikin da aka gyara akan allon da aka buga, gabaɗaya yana rarrabawa ko hanyar buga allo na allo don rarrabawa. . Haɗa abubuwan da aka gyara sannan a saka su a cikin tanda ko murhun murhu don zafi da taurara.

Maƙallan facin sarrafa faci shine zafin bayan warkewa, zafin zafin ƙarfaffen aikin patch ɗin gabaɗaya shine digiri 150, reheating ba zai narke ba, wato tsarin sarrafa ƙwanƙwasa aikin facin ba zai yiwu ba. Sakamakon aiki na facin zai bambanta saboda yanayin warkar da zafi, haɗi, kayan aikin da ake amfani da su, da yanayin aiki. Yakamata a zaɓi m facin bisa ga tsarin taron da’irar da aka buga ().

Patch sarrafa ja manne shine sinadarin sunadarai, galibi ya ƙunshi kayan polymer. Filler na sarrafa faci, wakili na warkewa, sauran abubuwan ƙari, da sauransu. Patch sarrafa ja m yana da ruwa mai ɗaci, halayen zafin jiki, halayen rigar da sauransu. Dangane da halayen jan manne a cikin sarrafa SMT, makasudin yin amfani da manne ja a cikin samarwa shine sanya sassan su tsaya da ƙarfi akan farfajiyar PCB da hana shi fadowa.

Patch sarrafa ja manne abu ne mai tsabta, ba samfur ɗin da ake buƙata na aiwatarwa ba, yanzu tare da ci gaba da haɓaka ƙirar hawa da fasaha, sarrafa faci ta hanyar walda rami, an tabbatar da walda mai gefe biyu, amfani da faci aiwatar faci m hawa tsari ne kasa da kasa Trend.

SMT ja manne misali tsari

Tsarin daidaitaccen tsarin samar da manne na SMT shine: bugun allo → (rarrabawa) → hawa → (curing) → reflow waldi → tsaftace → ganewa → gyara → kammala.

1. Bugun allo: aikin sa shine buga manna mai siyarwa (manna mai siyarwa) ko jan manne (manne faci) akan farantin allo na allon kewaye na PCB don shirya don walda abubuwan. Kayan aikin da ake amfani da su shine injin buga allo (injin buga allo), wanda ke kan gaba na layin samar da SMT.

2. Rarrabawa: shine manne ja mai matsewa zuwa madaidaicin matsayin PCB, babban aikinsa shine gyara abubuwan da aka gyara zuwa allon PCB. Injin da ke rarraba yana a ƙarshen ƙarshen layin samar da SMT ko bayan kayan aikin gwaji.

3. Dutsen: aikin sa shine daidai shigar da abubuwan haɗin taro na ƙasa akan madaidaicin matsayi na PCB. Kayan aikin da aka yi amfani da su shine injin SMT, wanda ke bayan injin bugun allo a cikin layin samar da SMT.

4. Magani: rawar da yake takawa ita ce ta narke jan manne (m faci), don abubuwan haɗin taro na farfaɗo da hukumar PCB sun daɗa daurewa gaba ɗaya. Kayan aikin da aka yi amfani da shi shine murhun warkarwa, wanda ke bayan injin SMT a cikin layin SMT.

5. Reflow waldi: aikinsa shi ne narke solder manna (solder manna), don haka da surface taro aka gyara da PCB jirgin daure bonded tare. Gidan wutar reflow yana bayan injin SMT a cikin layin SMT.

6. Tsaftacewa: aikinsa shi ne cire ragowar walda kamar juyi wanda ke cutar da jikin ɗan adam akan allon PCB da aka haɗa. Kayan aikin da ake amfani da su shine injin tsabtacewa, ba za a iya gyara matsayin ba, na iya zama kan layi, kuma ba zai iya zama kan layi ba.

7. Ganowa: aikinsa shine gano ingancin walda da ingancin taro na hukumar PCB da aka haɗa. Kayan aikin da aka yi amfani da su shine gilashin ƙara girma, madubin dubawa, kayan gwajin kan layi (ICT), kayan gwajin allurar tashi, gwajin gani na atomatik (AOI), tsarin gwajin X-ray, kayan gwajin aiki, da sauransu. Matsayi gwargwadon buƙatun dubawa, ana iya saita shi a cikin layin samarwa a wurin da ya dace.

8. Gyara: rawar da yake takawa shine gano gazawar hukumar PCB don sake yin aiki. Manyan kayan aikin da ake amfani da su sune bindigar zafi, baƙin ƙarfe, aikin gyara wuri, da dai sauransu. Ana iya shigar da shi ko’ina cikin layin samarwa.