Ndi Njira Zotani Zowonjezerera PCBA Board Soldering?

M'kati PCBA processing, pali njira zambiri kupanga, amene n'zosavuta kubala mavuto ambiri khalidwe.Panthawi imeneyi, m'pofunika nthawi zonse kusintha PCBA kuwotcherera njira ndi kusintha ndondomeko bwino kusintha mankhwala khalidwe.

I. Sinthani kutentha ndi nthawi yowotcherera

Kulumikizana kwapakati pakati pa mkuwa ndi malata kumapanga njere, mawonekedwe ndi kukula kwa mbewu zimadalira nthawi ndi mphamvu ya kutentha pamene zida za soldering mongareflow uvunikapenamakina opangira ma wave soldering.PCBA SMD processing reaction nthawi yayitali kwambiri, kaya chifukwa cha nthawi yayitali yowotcherera kapena chifukwa cha kutentha kwambiri kapena zonse ziwiri, zingayambitse mawonekedwe a kristalo, mawonekedwe ake ndi amiyala komanso olimba, mphamvu yakumeta ubweya ndi yaying'ono.

II.Chepetsani kukangana pamwamba

Tin-kutsogolera solder mgwirizano ndi wamkulu kuposa madzi, kotero kuti solder ndi bwalo kuchepetsa pamwamba dera lake (voliyumu yemweyo, gawoli ali ndi malo ang'onoang'ono padziko poyerekeza ndi akalumikidzidwe ena a geometric, kukwaniritsa zosowa za otsika mphamvu boma. ).Udindo wa flux ndi wofanana ndi ntchito yoyeretsa pazitsulo zachitsulo zokutidwa ndi mafuta, kuwonjezera apo, kugwedezeka kwapamwamba kumadaliranso pamlingo wa ukhondo wa pamwamba ndi kutentha, pokhapokha pamene mphamvu yomatira imakhala yaikulu kwambiri kuposa pamwamba. mphamvu (kugwirizana), dip tin yoyenera ikhoza kuchitika.

III.PCBA board dip malata angle

Pafupifupi 35 ℃ apamwamba kuposa kutentha kwa eutectic point of the solder, dontho la solder likayikidwa pamtunda wotentha wokutidwa ndi flux, mwezi wopindika umapangidwa, mwanjira ina, kuthekera kwa chitsulo kumiza malata kungayesedwe. ndi mawonekedwe a mwezi wopindika pamwamba.Ngati solder kupinda mwezi pamwamba ndi bwino pansi odulidwa m'mphepete, zooneka ngati kudzoza mbale zitsulo pa madontho a madzi, kapena amakonda ozungulira, chitsulo si solderable.Only yokhota kumapeto mwezi pamwamba anatambasula mu ngodya yaing'ono zosakwana 30. Only wabwino weldability.

IV.Vuto la porosity lopangidwa ndi kuwotcherera

1. Kuphika, PCB ndi zigawo zomwe zimawonekera mumlengalenga kwa nthawi yayitali kuti zipse, kuteteza chinyezi.

2. Solder phala kulamulira, solder phala munali chinyezi komanso sachedwa porosity, malata mikanda.Choyamba, ntchito zabwino solder phala, solder phala tempering, oyambitsa malinga ndi ntchito ya kukhazikitsa okhwima, solder phala poyera mpweya kwa nthawi yochepa ngati n'kotheka, pambuyo kusindikiza solder phala, kufunika yake reflow soldering.

3. Kuwongolera chinyezi cha msonkhano, kulinganiza kuyang'anira chinyezi cha msonkhanowo, kuwongolera pakati pa 40-60%.

4. Khazikitsani kutentha kwa ng'anjo yoyenera, kawiri pa tsiku pa kuyesa kutentha kwa ng'anjo, konzani kutentha kwa ng'anjo, kutentha kwa kutentha sikungakhale mofulumira kwambiri.

5. Kupopera mbewu mankhwalawa, mu kupitiriraSMD wave soldering makina, kuchuluka kwa kupopera mbewu mankhwalawa sikungakhale kochulukirapo, kupopera mbewu mankhwalawa moyenera.

6. Konzani kutentha kwa ng'anjo ya ng'anjo, kutentha kwa preheating zone kumafunika kukwaniritsa zofunikira, osati kutsika kwambiri, kotero kuti kuphulika kungathe kuphulika, ndipo kuthamanga kwa ng'anjo sikungakhale mofulumira kwambiri.