Zuva rega rega ndakadzidza zvishoma zvePCB uye ndinotenda kuti ndinogona kuwedzera kuve nyanzvi mubasa rangu. Nhasi, ndinoda kuunza 16 mhando dzePCB weld defects kubva pakuonekwa maitiro, njodzi, zvikonzero.
1.Pseudo Soldering
Chitarisikopane muganho mutema uri pachena pakati pe solder nechikamu lead kana copper foil, uye solder iri concave kumuganhu.
Njodzihaigoni kushanda nemazvo
Zvinokonzera:1) waya dzinotungamira dzezvikamu hadzina kucheneswa zvakanaka, dzisina kusungirirwa zvakanaka kana kuti oxidized.
2) PCB haina kuchena, uye mhando yeflux yakapfapfaidzwa haina kunaka
2. Solder kuunganidza
ChitarisikoSolder majoini akasununguka, machena uye akasviba.
Njodzimechanical simba haina kukwana, may virtual welding
Zvinokonzera:1) urombo husina kunaka hwekutengesa.2) kusakwana kwekushisa kwekushisa.3) kana solder isati yasimbiswa, mutungamiri wechikamu unova wakasununguka.
3.Too much solder
ChitarisikoIyo solder face ine convex
NjodziWaste solder uye inogona kunge iine hurema
Zvinokonzera:solder kubvisa kunonoka
4. Mutoro mudiki
ChitarisikoNzvimbo yewelding iri pasi pe80% yewelding pad, uye solder haigadziri nzvimbo yakatsetseka yekuchinja.
Njodzimechanical simba harina kukwana,
Zvinokonzera:1) murombo solder fluidity kana nguva isati yakwana solder kubvisa. 2) kusakwana flux.3) welding nguva ipfupi.
5. Rosin welding
ChitarisikoPane rosin yakasara mu weld
Njodzikuwanda kwekukuvadza hakuna kukwana, conduction yakashata, pamwe painodzima nekudzima
Zvinokonzera:1) kuwandisa welding muchina kana kukundikana.2) kusakwana welding nguva uye kudziyisa.3) pamusoro oxide firimu haina kubviswa.
6. hyperthermia
ChitarisikoIyo solder yekubatanidza ichena, isina metallic luster, iyo yepamusoro yakaoma.
NjodziZviri nyore kubvisa padhi ye welding uye kuderedza simba
Zvinokonzera:iye solder iron ine simba zvakanyanya uye nguva yekudziya yakarebesa
7. kutonhora welding
Chitarisikoiyo yepamusoro mu tofu slag particles, dzimwe nguva inogona kuva nekuputika
NjodziKuderera kwehuremu uye kusaita zvakanaka kwemagetsi
Zvinokonzera:solder dithers isati yasimba.
8. Kupinza zvakaipa
Chitarisikoiyo interface pakati pe solder uye welding yakakura kwazvo, kwete yakatsetseka
NjodziLow intensity, isingafambiki kana kupindirana
Zvinokonzera:1) welding zvikamu hazvina kucheneswa 2) kusakwana flux kana hurombo husina kunaka.3) welding zvikamu hazvina kupisa zvakakwana.
9. dissymmetry
Chitarisikoiyo solder ndiro haina kuzara
NjodziKusakwana kukuvadza kusimba
Zvinokonzera:1) murombo solder fluidity.2) kusakwana kuyerera kana kutadza kunaka.3) kusakwana kupisa.
10. Kurasikirwa
Chitarisikowaya dzinotungamirira kana zvikamu zvinogona kutamiswa
Njodzizvakaipa kana kusaita conduction
Zvinokonzera:1) kutungamirira kufamba kunokonzera kupera pamberi pe solder solidification.2) lead haina kubatwa zvakanaka (yakashata kana kusapinzwa)
11.Solder fungidziro
Chitarisikokuoneka cusp
NjodziChitarisiko chakashata, chiri nyore kukonzera bhiriji
Zvinokonzera:1) kuyerera kudiki uye nguva yekudziya yakarebesa.2) Kubvisa zvisina kufanira Engle yesimbi inodhaka.
12. Bridge connection
ChitarisikoPedyo newaya yekubatanidza
NjodziElectrical short circuit
Zvinokonzera:1) solder yakawandisa. 2) kubviswa kusina kunaka kweAngle yesimbi yesimbi
13.Pina Makomba
ChitarisikoMakomba anoonekwa mukuona kana kuderera simba amplifiers
NjodziSimba risina kukwana uye kuora nyore kwemajoini ekutengesa
Zvinokonzera:mukaha uri pakati pewaya inotungamira uye gomba rewelding pad yakakura zvakanyanya.
14.Bubble
Chitarisikomudzi wewaya inotungamira une spitfire solder uplift uye mukati memhango
NjodziTemporary conduction, asi zviri nyore kukonzera kwakaipa conduction kwenguva yakareba
Zvinokonzera:1) mukaha mukuru pakati pomutobvu uye welding pad gomba.2) mutobvu murombo kupinda infiltration.3) kaviri panel plugging kuburikidza negomba kunotora nguva yakareba kuti weld, uye mhepo mukati mugomba kuwedzera.
15. Copper foil kumusoro
Chitarisikofoil yemhangura kubva kune yakadhindwa bhodhi kubvisa
NjodziIyo pcb yakakuvadzwa
Zvinokonzera:nguva yewelding yakarebesa uye tembiricha yakanyanya.
16. Peeling
Chitarisikoiyo solder kubva mumhangura foil peeling (kwete foil yemhangura uye PCB kubvisa)
Njodzicircuit breaker
Zvinokonzera:kupfekedzwa kwesimbi kwakashata pane welding pad.