PCB kukanganisa idambudziko rakajairika muPCBA misa kugadzirwa, iyo ichava nekukanganisa kukuru pagungano uye kuyedzwa, zvichikonzera kusagadzikana kwemagetsi redunhu basa, dunhu pfupi redunhu / rakavhurika redunhu kutadza.
Zvikonzero zvePCB deformation ndezvizvi:
1. Temperature yePCBA board ichipfuura choto
Mabhodhi edunhu akasiyana ane kushivirira kwakanyanya.Apo iyoreflow oventembiricha yakakwira zvakanyanya, yakakwira kupfuura iyo yakanyanya kukosha yedunhu bhodhi, ichaita kuti bhodhi ripfave uye kukonzera deformation.
2. Chikonzero chePCB board
Kuzivikanwa kwe tekinoroji isina-lead, tembiricha yechoto yakakwirira kupfuura iyo yemutobvu, uye zvinodiwa zvehunyanzvi hweplate zvakakwirira uye zvakakwirira.Iyo yakaderera kukosha kweTG, zviri nyore kuti bhodhi redunhu rinokanganisa panguva yevira.Iyo yakakwirira iyo TG kukosha, iyo inodhura zvakanyanya bhodhi ichave.
3. PCBA bhodhi saizi uye nhamba yemapuranga
Kana bhodhi redunhu raperareflow welding muchina, inowanzoiswa mucheni yekufambisa, uye cheni dziri kumativi ose dzinoshanda sezvitsigiro.Saizi yebhodhi redunhu yakakura kwazvo kana nhamba yemapuranga yakakura kwazvo, zvichikonzera kuderera kwebhodhi redunhu rakananga pakati, zvichikonzera deformation.
4. Kukora kwePCBA board
Nekuvandudzwa kwezvigadzirwa zvemagetsi munzira yediki uye yakaonda, ukobvu hwebhodhi redunhu huri kuderera.Iyo yakaonda bhodhi redunhu iri, zviri nyore kukonzera deformation yebhodhi pasi pesimba rekushisa kwakanyanya kana reflow welding.
5. Kudzika kwev-cut
V-cut ichaparadza sub-structure yebhodhi.V-kuchekwa kuchacheka magrooves papepa hombe rekutanga.Kana iyo V-yakatemwa mutsara yakadzika zvakanyanya, deformation yePCBA board ichakonzerwa.
Nzvimbo dzekubatanidza dzezvikamu paPCBA board
Bhodhi remazuva ano bhodhi re-multi-layer board, kune akawanda ekuchera mapoinzi ekubatanidza, aya mapoinzi ekubatanidza akakamurwa kuita kuburikidza negomba, gomba remapofu, rakavigwa gomba poindi, aya mapoinzi ekubatanidza anozodzikamisa mhedzisiro yekuwedzera kwekupisa uye kuputika kwebhodhi redunhu. , zvichiita kuti deformation yebhodhi.
Mhinduro:
1. Kana mutengo nenzvimbo zvichibvumira, sarudza PCB ine Tg yakakwirira kana kuwedzera PCB ukobvu kuti uwane yakanakisa chikamu reshiyo.
2. Gadzira PCB zvinonzwisisika, nzvimbo yesimbi yemativi maviri inofanira kuva yakaenzana, uye mhangura yemhangura inofanira kuvharwa pasina dunhu, uye kuonekwa nenzira yegridhi kuti iwedzere kuoma kwePCB.
3. PCB inofanobikwa pamberi peSMT pa125 ℃/4h.
4. Rongedza gadziriso kana clamping chinhambwe kuti uve nechokwadi chekuti nzvimbo yePCB yekudziya yekuwedzera.
5. Welding process tembiricha yakaderera sezvinobvira;Kukanganisa kwakapfava kwaonekwa, kunogona kuiswa munzvimbo yekumisikidza, tembiricha reset, kusunungura kushushikana, kazhinji mhedzisiro inogutsa ichawanikwa.
Nguva yekutumira: Oct-19-2021