Kuti uone kutonga kwekumhanya kwemhepo uye vhoriyamu yemhepo, mapoinzi maviri anofanirwa kutariswa kune:
- Iko kumhanya kwe fan kunofanirwa kudzorwa ne frequency conversion kudzikisa pesvedzero yevoltage fluctuation pairi;
- Deredza mhepo yemhepo inoputika yemidziyo, nokuti mutoro wepakati wemhepo inoputika inowanzosagadzikana, iyo inokanganisa nyore nyore kuyerera kwemhepo inopisa muchoto.
- Equipment kugadzikana
Pakarepo tawana iyo yakakwana yekushisa tembiricha yekumisikidza curve, asi kuti zviitike, kugadzikana, kudzokororwa uye kuenderana kwemidziyo inodiwa kuti ivimbise.Kunyanya yekugadzirwa-isina lead, kana tembiricha yevira ikanyura zvishoma nekuda kwezvikonzero zvemidziyo, zviri nyore kusvetukira kunze kwehwindo rekuita uye kukonzeresa kutonhora kana kukuvadza kune yekutanga mudziyo.Naizvozvo, vagadziri vanowedzera vari kutanga kuisa kumberi kugadzikana bvunzo zvinodiwa zvemidziyo.
l Kushandisa nitrogen
Nekuuya kweiyo lead-free era, ingave reflow soldering yakazadzwa nenitrogen yave nyaya inopisa yekukurukurirana.Nekuda kwemvura, solderability, uye kunyorova kwevatengesi vasina lead, havana kunaka sevatengesi vanotungamira, kunyanya kana mapedhi ebhodhi edunhu atora maitiro eOSP (organic protective film bare copper board), mapadhi ari nyore kuita oxidize, kazhinji zvinoguma nemasolder joints The wetting angle yakakura zvikuru uye padhi inoratidzwa nemhangura.Kuti tivandudze kunaka kwemajoini emasoja, isu dzimwe nguva tinoda kushandisa nitrogen panguva yereflow soldering.Nitrogen iinert shielding gasi, iyo inogona kuchengetedza dhigirii bhodhi pads kubva kune oxidation panguva yekutengesa, uye zvakanyanya kuvandudza solderability yevatengesi vasina lead (Mufananidzo 5).
Mufananidzo 5 Welding yesimbi shield pasi pe nitrogen-yakazadzwa nharaunda
Kunyange zvazvo vagadziri vezvigadzirwa zvemagetsi vakawanda vasingashandisi nitrogen kwenguva pfupi nekuda kwekufunga kwemutengo wekushanda, nekuenderera mberi kwekuvandudzwa kwezvinodiwa mutobvu-isina soldering quality, kushandiswa kwenitrogen kunowedzera kuwedzera.Naizvozvo, sarudzo iri nani ndeyekuti kunyangwe nitrogen isingashandiswe mukugadzirwa chaiko pari zvino, zviri nani kusiya michina ine nitrogen yekuzadza interface kuti ive nechokwadi chekuti michina ine shanduko yekusangana nezvinodiwa zve nitrogen kuzadza kugadzirwa mune ramangwana.
l Inoshanda kutonhora mudziyo uye flux manejimendi system
Iyo tembiricha yekudziya yekugadzira-isina mutobvu yakakwira zvakanyanya kupfuura iyo yemutobvu, iyo inoisa kumberi kwepamusoro zvinodiwa zvekutonhodza basa remidziyo.Uye zvakare, iyo inodzoreka inokurumidza kutonhora mwero inogona kuita iyo lead-isina solder yejointi dhizaini, iyo inobatsira kuvandudza mechanical simba rejoint solder.Kunyanya kana isu tichigadzira mapuranga edunhu ane simba rakakura rekupisa senge kutaurirana backplanes, kana tikangoshandisa kutonhora kwemhepo, zvichange zvakaoma kuti mabhodhi edunhu asangane nezvinodiwa zvekutonhora zve3-5 madhigirii pasekondi panguva yekutonhora, uye kutonhora kutsetseka hakugone. kusvika Chinodiwa chichasunungura solder joint structure uye zvinokanganisa zvakananga kuvimbika kwejoint solder.Naizvozvo, kugadzirwa-isina lead kunonyanya kukurudzirwa kufunga nezve kushandiswa kwemaviri-kutenderera mvura yekutonhodza michina, uye kutonhora kutsetseka kwemidziyo kunofanirwa kuiswa sezvinodiwa uye kudzoreka zvizere.
Lead-isina solder paste kazhinji ine yakawanda flux, uye iyo inoyerera yakasara iri nyore kuunganidza mukati mechoto, iyo inokanganisa kupisa kwekushisa kuita kwemidziyo, uye dzimwe nguva inotodonha pabhodhi redunhu muchoto kukonzera kusvibiswa.Pane nzira mbiri dzekuburitsa iyo flux yakasara panguva yekugadzira maitiro;
(1) Kubudisa mweya
Mhepo inonetesa ndiyo nzira iri nyore yekuburitsa masara emvura.Zvisinei, takataura munyaya yapfuura kuti mhepo yakanyanyisa inopera ichakanganisa kugadzikana kwemhepo inopisa inoyerera muchoto chevira.Mukuwedzera, kuwedzera kuwanda kwemhepo inopera kuchaita zvakananga kuwedzera kwekushandiswa kwesimba (kusanganisira magetsi uye nitrogen).
(2) Multi-level flux management system
Iyo flux manejimendi sisitimu inowanzo sanganisira mudziyo wekusefa uye mudziyo wekudzikisa (Mufananidzo 6 uye Mufananidzo 7).Mudziyo wekusefa unonyatso patsanura uye kusefa zvimedu zvakaomesesa mune inoyerera yakasara, ukuwo mudziyo wekutonhodza unokonesa gaseous flux yasara kuita mvura iri muchitsinhanho chekupisa, uye pakupedzisira inoiunganidza mutireyi yekuunganidza kuti igadzirwe pakati.
Mufananidzo 6 Kusefa mudziyo mune flux manejimendi system
Mufananidzo 7 Condensing mudziyo mune flux manejimendi system
Nguva yekutumira: Aug-12-2020