Sezvatinoziva isu tese, PCB inowanzo kukotama uye kuputika kana ichipfuura nemuovheni yekuyerera.Nzira yekudzivirira sei PCB kubva pakukotama uye kuputika kana ichipfuura nemuovheni yekuyerera inotsanangurwa pazasi
1. Deredza simba rekushisa paPCB stress
Sezvo "tembiricha" iriyo inonyanya kukonzera kushushikana kweplate, chero bedzi tembiricha yevira rekuyerera yakaderedzwa kana kudziya uye kutonhora kwendiro muchoto chekuyerera ichidzikiswa, kuitika kwekukotama kweplate uye kutenderera kunogona kuderedzwa zvakanyanya.Zvisinei, panogona kuva nemimwe migumisiro, yakadai solder short circuit.
2. Adopt high TG ndiro
TG ndiyo tembiricha yekushanduka kwegirazi, ndiko kuti, tembiricha painochinja zvinhu kubva pagirazi kuenda kune yakasarudzika.Iyo yakaderera TG kukosha kwezvinhu, iyo inokurumidza ndiro inotanga kupfava mushure mekupinda muchoto chekuyerera, uye nekurebesa nguva yekuve yakapfava rubberized state, zvakanyanya kuoma deformation yeplate.Iko kugona kutakura kushushikana uye deformation inogona kuwedzerwa nekushandisa ndiro ine yakakwira TG, asi mutengo wezvinhu wakakwira.
3. Wedzera kukora kwebhodhi redunhu
Zvigadzirwa zvemagetsi zvakawanda kuitira kuti zvizadzise chinangwa chekutetepa, ukobvu hwebhodhi hwakasiiwa 1.0 mm, 0.8 mm, kana kunyange 0.6 mm, ukobvu hwakadaro kuchengetedza bhodhi mushure mekuyerera kwevira harina kukanganisa, ichokwadi zvishoma. zvakaoma, zvinokurudzirwa kuti kana pasina zvakatetepa zvinodiwa, bhodhi rinogona kushandisa 1.6 mm ukobvu, izvo zvinogona kuderedza zvakanyanya njodzi yekukotama uye deformation.
4. Deredza ukuru hwebhodhi redunhu uye nhamba yemapuranga
Sezvo mahovhoni mazhinji ereflow anoshandisa maketani kutyaira mabhodhi edunhu mberi, iyo yakakura saizi yebhodhi redunhu, iyo yakawanda concave ichava muhovheni yekuyerera nekuda kwehuremu hwayo.Nokudaro, kana rutivi rurefu rwebhodhi redunhu rakaiswa pamaketani evheni reflows semupendero webhodhi, iyo concave deformation inokonzerwa nehuremu hwebhodhi redunhu inogona kuderedzwa, uye nhamba yemapuranga inogona kuderedzwa nokuda. chikonzero ichi, Kureva kuti, kana choto, edza kushandisa nhete divi perpendicular kugwara kwechoto, anogona kubudirira kuti yakaderera sag deformation.
5. Akashandisa pallet fixture
Kana nzira dzese dziri pamusoro dzakaoma kuwana, Iko kushandisa reflow carrier / template kuderedza deformation.Chikonzero chekuti reflow carrier / template inogona kuderedza kukotama uye kutenderera kwebhodhi ndechekuti kunyangwe kuri kuwedzera kwemafuta kana kutonhora kuderera, tireyi inotarisirwa kubata bhodhi redunhu.Kana tembiricha yebhodhi redunhu yakadzikira pane kukosha kweTG uye inotanga kuomesa zvakare, inogona kuchengetedza saizi yakatenderedza.
Kana imwe-layer tireyi havagoni kuderedza deformation redunhu bhodhi, tinofanira kuwedzera jira chivharo kusungirira redunhu bhodhi ane maviri akaturikidzana tireyi, izvo zvinogona kuderedza zvikuru deformation redunhu bhodhi kuburikidza reflow ovheni.Nekudaro, iyi tireyi yevira inodhura zvakanyanya, uye zvakare inoda kuwedzera bhuku rekuisa uye kudzoreredza tireyi.
6. Shandisa router panzvimbo yeV-CUT
Sezvo V-CUT ichakuvadza kusimba kwemaitiro emapuranga ematunhu, edza kusashandisa V-CUT kupatsanurwa kana kuderedza kudzika kweV-CUT.
Nguva yekutumira: Jun-24-2021