Indlela yokunciphisa ukungezwani kwendawo kanye ne-viscosity ku-PCBA soldering?

I. Izinyathelo zokushintsha ukungezwani kwendawo kanye ne-viscosity

I-viscosity kanye nokungezwani kwendawo yizici ezibalulekile ze-solder.I-solder enhle kakhulu kufanele ibe ne-viscosity ephansi kanye nokungezwani kwendawo lapho incibilika.Ukungezwani kwendawo kuyisimo sezinto ezibonakalayo, akukwazi ukuqedwa, kodwa kungashintshwa.

1.Izinyathelo eziyinhloko zokunciphisa ukungezwani kwendawo kanye ne-viscosity ku-PCBA soldering yilezi ezilandelayo.

Khulisa izinga lokushisa.Ukuphakamisa izinga lokushisa kungakhuphula ibanga lamangqamuzana ngaphakathi kwe-solder encibilikisiwe futhi kunciphise amandla adonsela phansi ama-molecule ngaphakathi kwe-solder ye-liquid kuma-molecule angaphezulu.Ngakho-ke, ukuphakamisa izinga lokushisa kunganciphisa i-viscosity kanye nokungezwani kwendawo.

2. Ukungezwani okungaphezulu kwe-Sn kuphezulu, futhi ukungezwa kwe-Pb kunganciphisa ukungezwani kwendawo.Khulisa okuqukethwe komthofu kusidayisi se-Sn-Pb.Uma okuqukethwe kwe-Pb kufinyelela ku-37%, ukungezwani kwendawo kuyehla.

3. Ukwengeza i-ejenti esebenzayo.Lokhu kunganciphisa ngokuphumelelayo ukungezwani kwendawo ye-solder, kodwa futhi ukususa ungqimba lwe-oxide ye-solder.

Ukusetshenziswa kwe-nitrogen yokuvikela i-pcba welding noma i-vacuum welding kunganciphisa izinga lokushisa eliphezulu oxidation futhi kuthuthukise ukumanzisa.

II.indima ye-surface tension ekushiseleni

Ukushuba kobuso namandla okumanzisa ngakolunye uhlangothi, ngakho-ke ukushuba kwendawo kungenye yezinto ezingahambisani nokumanzisa.

Ukuthigeleza kabushaihhavini, i-wave solderingumshininoma i-soldering manual, ukungezwani kwendawo yokwakhiwa kwamalunga amahle e-solder yizici ezingathandeki.Kodwa-ke, kunqubo yokubeka i-SMT yenqubo yokugeleza kabusha kwe-solder tension kungasetshenziswa futhi.

Lapho i-solder paste ifinyelela ekushiseni okuncibilikayo, ngaphansi kwesenzo sokucindezeleka kwendawo elinganiselayo, izokhiqiza umphumela wokuzimisa ( Ukuqondanisa Self), okungukuthi, lapho indawo yokubeka ingxenye inokuphambuka okuncane, ngaphansi kwesenzo sokucindezeleka kwendawo, ingxenye ingadonselwa emuva ngokuzenzakalelayo endaweni okuhloswe ngayo.

Ngakho-ke ukushuba kwendawo kwenza inqubo yokugeleza kabusha ukuze kukhweze imfuneko enembayo ixege, kube lula ukubona i-automation ephezulu kanye nesivinini esikhulu.

Ngesikhathi esifanayo futhi kungenxa yokuthi isici "sokugeleza kabusha" kanye nesici "sokuzenzela indawo", idizayini yephedi yephedi yokugeleza kabusha kwe-SMT, ukumiswa kwengxenye nokunye kunesicelo esiqine kakhulu.

Uma ukungezwani kwamanzi kungalingani, ngisho noma indawo yokubeka inembile kakhulu, ngemuva kokushisela kuzovela ingxenye yesikhundla se-offset, isikhumbuzo esimile, ibhuloho kanye nezinye iziphambeko zokushisela.

Lapho i-wave soldering, ngenxa yobukhulu nokuphakama kwengxenye yomzimba wengxenye ye-SMC/SMD ngokwayo, noma ngenxa yengxenye ephezulu evimba ingxenye emfishane futhi ivimbe ukugeleza kwegagasi kwe-tin okuzayo, kanye nomphumela wethunzi obangelwa ukungezwani okungaphezulu kwegagasi lethini. ukugeleza, i-solder ye-liquid ayikwazi ukungenwa ngemuva kwengxenye yomzimba ukuze yakhe indawo yokuvimbela ukugeleza, okuholela ekuvuzeni kwe-solder.

Izici zeI-NeoDen IN6 Reflow Soldering umshini

I-NeoDen IN6 inikezela nge-reflow soldering esebenzayo yabakhiqizi be-PCB.

Idizayini engaphezulu kwetafula yomkhiqizo ikwenza ube yisixazululo esiphelele semigqa yokukhiqiza enezidingo ezihlukahlukene.Idizayinelwe nge-automation yangaphakathi esiza opharetha ukuthi bahlinzeke nge-solder ehlelekile.

Imodeli entsha isidlulile isidingo se-heater ye-tubular, ehlinzeka ngokusabalaliswa kwezinga lokushisakulo lonke ihhavini lokugeleza kabusha.Ngokusoda ama-PCB ngisho naku-convection, zonke izingxenye zishiselwa ngesilinganiso esifanayo.

Idizayini isebenzisa ipuleti lokushisisa ingxubevange ye-aluminium enyusa ukusebenza kahle kwamandla kwesistimu.Isistimu yokuhlunga intuthu yangaphakathi ithuthukisa ukusebenza komkhiqizo futhi inciphisa okukhiphayo okuyingozi, nayo.

Amafayela asebenzayo ayabekeka kuhhavini, futhi womabili amafomethi e-Celsius ne-Fahrenheit ayatholakala kubasebenzisi.Ihhavini isebenzisa umthombo wamandla angu-110/220V AC futhi inesisindo esiphelele esingu-57kg.

I-NeoDen IN6 yakhiwe ngegumbi lokufudumeza i-aluminium alloy.