Lokacin da muke magana game da ƙwanƙwasa solder, da farko muna buƙatar bayyana daidaitaccen lahani na SMT.Ana samun dutsen gwangwani akan farantin waldar da aka sake kwarara, kuma za ka iya kallo cewa babban kwano ce da aka cusa a cikin tafkin ruwa wanda ke kusa da wasu abubuwa masu hankali da tsayin ƙasa kaɗan, kamar su resistors sheet da capacitors, bakin ciki. ƙananan fakitin bayanan martaba (TSOP), ƙananan transistor profile (SOT), transistor D-PAK, da kuma taron juriya.Saboda matsayinsu dangane da wadannan sassa, ana kiran ƙullun kwano da sunan “Satellites”.
Tin beads ba wai kawai yana shafar bayyanar samfurin ba, amma mafi mahimmanci, saboda yawan abubuwan da aka gyara akan farantin da aka buga, akwai haɗarin gajeriyar da'ira na layi yayin amfani, don haka yana shafar ingancin samfuran lantarki.Akwai dalilai da yawa na samar da ƙwanƙwasa gwangwani, sau da yawa wasu dalilai guda ɗaya ko fiye ke haifar da su, don haka dole ne mu yi aiki mai kyau na rigakafi da ingantawa don inganta shi.Kasidar ta gaba za ta tattauna abubuwan da ke shafar samar da ƙwanƙwasa da kuma matakan da za a bi don rage samar da ƙwanƙwasa.
Me yasa kwalliyar kwano ke faruwa?
A taƙaice dai, ana danganta ƙuƙumman kwano da yawa da ɗorawa da manna kayan kwalliya, domin ba shi da “jiki” kuma ana matse shi a ƙarƙashin wasu abubuwan da aka sani don samar da kwano, kuma ana iya danganta su da ƙãrawar kamannin su da karuwar amfani da kurkura. -a cikin solder manna.Lokacin da aka ɗora ɓangaren guntu a cikin manna mai kurkura, mai solder ɗin zai fi matsi a ƙarƙashin ɓangaren.Lokacin da manna solder da aka ajiye ya yi yawa, yana da sauƙin extrusion.
Manyan abubuwan da suka shafi samar da kwano su ne:
(1) Buɗewa samfuri da ƙira mai hoto
(2) Tsabtace samfuri
(3) Maimaitu daidaito na na'ura
(4) Matsakaicin zafin wutar tanderu
(5) Matsin lamba
(6) yawan manna solder a wajen kwanon rufi
(7) Tsayin dala ta sauka
(8) Gas saki na maras tabbas abubuwa a cikin layi farantin da solder juriya Layer
(9)Dangataka da juyi
Hanyoyin hana samar da kwano:
(1) Zaɓi zanen kushin da ya dace da ƙirar girman.A cikin ainihin kushin zane, ya kamata a hade tare da PC, sa'an nan kuma bisa ga ainihin bangaren kunshin size, waldi karshen size, don tsara daidai kushin size.
(2) Kula da samar da ragar karfe.Wajibi ne a daidaita girman buɗewa bisa ga ƙayyadaddun fasalin ɓangaren kwamitin PCBA don sarrafa adadin bugu na manna mai siyarwa.
(3) Ana ba da shawarar cewa allunan dandali na PCB tare da BGA, QFN da abubuwan haɗin kafa masu yawa a kan allo sun ɗauki tsauraran matakan yin burodi.Don tabbatar da cewa an cire danshin saman da ke kan farantin solder don ƙara yawan walƙiya.
(4) Inganta ingancin samfuri tsaftacewa.Idan tsaftacewa ba ta da tsabta.Ragowar manna solder a ƙasan buɗe samfurin zai taru kusa da buɗe samfurin kuma ya samar da manna solder da yawa, yana haifar da kwano beads.
(5) Don tabbatar da maimaitawar kayan aiki.Lokacin da aka buga man siyar, saboda kashewar da ke tsakanin samfuri da pad ɗin, idan kuɗin ya yi girma sosai, za a jiƙa wannan man ɗin a wajen pad ɗin, kuma ƙullun kwano za su fito cikin sauƙi bayan dumama.
(6) Sarrafa matsa lamba na na'ura mai hawa.Ko yanayin sarrafa matsa lamba yana haɗe, ko sarrafa kauri na ɓangaren, ana buƙatar gyara Saitunan don hana ƙullun kwano.
(7) Inganta yanayin zafin jiki.Sarrafa yawan zafin jiki na walƙiya mai sake kwarara, ta yadda za a iya daidaita sauran ƙarfi akan mafi kyawun dandamali.
Kada ku dubi "tauraron tauraron dan adam" karami ne, ba za a iya jawo mutum ba, ja jiki duka.Tare da na'urorin lantarki, shaidan sau da yawa yana cikin cikakkun bayanai.Sabili da haka, ban da hankali ga ma'aikatan samar da tsari, sassan da suka dace ya kamata su yi aiki tare da rayayye, da sadarwa tare da ma'aikatan tsari a cikin lokaci don canje-canje na kayan aiki, maye gurbin da sauran al'amura don hana canje-canje a cikin sigogi na tsari wanda ya haifar da canje-canjen kayan aiki.Mai zanen da ke da alhakin ƙira da'ira na PCB ya kamata kuma ya sadarwa tare da ma'aikatan tsari, koma ga matsaloli ko shawarwarin da ma'aikatan ke bayarwa da inganta su gwargwadon yiwuwa.
Lokacin aikawa: Janairu-09-2024