Iko hakuna goridhe, hapana akakwana ”, ndizvo zvinoita PCB board.MuPCB welding, nekuda kwezvikonzero zvakasiyana-siyana, kukanganisa kwakasiyana-siyana kunowanzoitika, senge welding, kupisa, bhiriji uye zvichingodaro.Ichi chinyorwa, Isu tinotsanangura zvakadzama maitiro ekutaridzika, njodzi uye chikonzero chekuongorora 16 yakajairika PCB solder defects.
01
Welding
Maitiro ekuonekwa: Pane muganhu wakasviba wakajeka pakati pe solder uye mutungamiri wechikamu kana nemhangura foil, uye solder inodzorerwa kumuganhu.
Kukuvadza: Kusashanda nemazvo.
Chikonzero Ongororo:
Iyo inotungamira yezvikamu haina kucheneswa, tinned kana oxidized.
Bhodhi rakadhindwa harina kuchena, uye iyo yakapfapfaidzwa flux ndeyehurombo.
02
Solder kuunganidza
Maitiro ekuonekwa: Iyo solder yekubatanidza chimiro yakasununguka, chena uye yakagomara.
Njodzi: Kusakwana kwesimba remagetsi, pamwe welding yenhema.
Chikonzero Ongororo:
Iyo solder yemhando haina kunaka.
Kupisa kwekutengesa hakuna kukwana.
Kana solder isina kusimbiswa, mutungamiri wechikamu unova wakasununguka.
03
Solder yakawandisa
Chitarisiko chechimiro: Iyo solder pamusoro inotenderera.
Hazard: Waste solder, uye inogona kunge iine hurema.
Chikonzero chekuongorora: solder kubvisa kunonoka.
04
Kunyanya solder
Maitiro ekuonekwa: Nzvimbo yekutengesa iri pasi pe80% yepadhi, uye solder haina kuumba nzvimbo yakatsetseka yekushandura.
Njodzi: kusakwana kwesimba remagetsi.
Chikonzero Ongororo:
Iyo solder fluidity haina kunaka kana solder inobviswa nekukurumidza.
Kuyerera kusina kukwana.
Nguva yewelding ipfupi.
05
Rosin welding
Chitarisiko hunhu: Rosin slag iri mune weld.
Njodzi: Simba risina kukwana, kusaenderera mberi, uye rinogona kubatidzwa nekudzimwa.
Chikonzero Ongororo:
Mawelder akawandisa kana atadza.
Kusakwana welding nguva uye kusakwana kupisa.
Iyo yepamusoro oxide firimu haina kubviswa.
06
overheat
Chitarisiko hunhu: chena solder majoini, hapana simbi inopenya, yakaoma pamusoro.
Njodzi: Iyo padhi iri nyore kubvisa uye simba rakaderedzwa.
Chikonzero chekuongorora: simba resimbi yesimbi yakakura zvikuru, uye nguva yekupisa yakareba.
07
Cold welding
Mamiriro ekuonekwa: iyo nzvimbo inova tofu-yakafanana zvidimbu, uye dzimwe nguva panogona kuve nekutsemuka.
Kukuvadza: Simba rakaderera uye kusaita zvakanaka.
Chikonzero chekuongorora: iyo solder jitters isati yasimba.
08
Kupinda kusina kunaka
Chitarisiko hunhu: Kubatana pakati pe solder uye weldment yakakura kwazvo uye haina kutsetseka.
Njodzi: Simba rakaderera, harisi kuwanikwa kana kupindirana nekudzima.
Chikonzero Ongororo:
Iyo weldment haina kucheneswa.
Kusakwana flux kana hurombo husina kunaka.
Iyo weldment haina kupisa zvakakwana.
09
Asymmetry
Maitiro ekuonekwa: solder haiyerere pamusoro pedhi.
Kukuvadza: Simba risina kukwana.
Chikonzero Ongororo:
Solder ine mvura shoma.
Kusakwana flux kana hurombo husina kunaka.
Kusakwana kupisa.
10
Loose
Maitiro ekuonekwa: Waya kana chikamu chinotungamira chinogona kutamiswa.
Njodzi: Hurombo kana kusaitisa.
Chikonzero Ongororo:
Iyo inotungamira inofamba isati yasimbiswa solder uye inokonzeresa kushaikwa.
Iyo inotungamira haina kugadziriswa zvakanaka (yakashata kana isina kunyorova).
11
Nyora
Chitarisiko maitiro: unopinza.
Kukuvadza: Chitarisiko chisina kunaka, chiri nyore kukonzera bhiriji.
Chikonzero Ongororo:
Iyo inoyerera ishoma uye nguva yekudziya yakarebesa.
Kusaita evacuation angle yesimbi yekusimbisa.
12
bhiriji
Maitiro ekuonekwa: waya dziri pedyo dzakabatanidzwa.
Njodzi: Yemagetsi pfupi dunhu.
Chikonzero Ongororo:
Kunyanya solder.
Kusaita evacuation angle yesimbi yekusimbisa.
13
Pinhole
Mamiriro ekuonekwa: kuongorora kwekuona kana mashoma-simba amplifiers anogona kuona maburi.
Njodzi: Simba risina kukwana uye kukora kuri nyore kwemajoini anotengeswa.
Chikonzero chekuongorora: mukaha pakati pekutungamira uye padhi gomba rakakura zvakanyanya.
14
bubble
Maitiro ekuonekwa: kune moto unofema solder bulge pamudzi wekutungamira, uye gomba rakavanzwa mukati.
Njodzi: Kwenguva pfupi conduction, asi zviri nyore kukonzeresa kusaita zvakanaka kwenguva yakareba.
Chikonzero Ongororo:
Pane mukaha mukuru pakati pemutobvu negomba repadhi.
Kupinza mutobvu kusina kunaka.
Nguva yewelding yeplate ine mativi maviri inovhara nepaburi yakareba, uye mweya uri mugomba unowedzera.
15
Copper foil yakakoshwa
Maitiro ekuonekwa: Iyo foil yemhangura inopepetwa kubva pabhodhi rakadhindwa.
Njodzi: Bhodhi rakadhindwa rakakuvadzwa.
Chikonzero chekuongorora: nguva yewelding yakareba uye tembiricha yakanyanya.
16
Peel off
Chitarisiko chechimiro: majoini ekutengesa anobvisa kubva papepa remhangura (kwete foil yemhangura uye bhodhi rakadhindwa rinoputika).
Hazard: Vhura dunhu.
Chikonzero chekuongorora: simbi yakashata yakanamirwa padhi.