Lub hauv paus ntsiab lus ntawm PCB ncoo tsim
Raws li kev txheeb xyuas ntawm cov qauv sib koom ua ke ntawm ntau yam khoom siv, txhawm rau ua kom tau raws li qhov yuav tsum tau muaj kev ntseeg siab ntawm cov pob qij txha, PCB ncoo tsim yuav tsum paub cov ntsiab lus tseem ceeb hauv qab no:
1, symmetry: ob qhov kawg ntawm lub ncoo yuav tsum sib npaug, thiaj li yuav ua kom qhov sib npaug ntawm molten solder nto nro.
2. Kev sib nrug ntawm lub ncoo: xyuas kom lub lap loj loj ntawm cov khoom kawg lossis tus pin thiab lub ncoo.Qhov loj dhau los yog qhov me me dhau ntawm qhov sib txawv yuav ua rau vuam tsis xws luag.
3. Qhov luaj li cas ntawm lub ncoo: qhov seem loj ntawm cov khoom kawg lossis tus pin tom qab lapping nrog lub ncoo yuav tsum xyuas kom meej tias qhov sib koom ua ke tuaj yeem tsim ib lub meniscus.
4.Pad dav: Nws yuav tsum ua raws li qhov dav ntawm qhov kawg lossis tus pin ntawm cov khoom.
Solderability teeb meem tshwm sim los ntawm kev tsim teeb meem
01. Qhov loj ntawm lub ncoo sib txawv
Qhov loj ntawm lub ncoo tsim yuav tsum ua kom zoo ib yam, qhov ntev yuav tsum haum rau qhov ntau, qhov ntev ntawm lub ncoo extension muaj qhov tsim nyog, luv luv lossis ntev dhau lawm yog qhov tshwm sim ntawm stele.Qhov loj ntawm lub ncoo tsis sib haum thiab qhov nro tsis sib xws.
02. Lub ncoo dav dav dua li tus pin ntawm lub cuab yeej
Pad tsim tsis tuaj yeem dav dhau ntawm cov khoom, qhov dav ntawm lub ncoo yog 2mil wider tshaj cov khoom.Qhov dav dav dhau ntawm lub ncoo yuav ua rau cov khoom hloov pauv, huab cua vuam thiab cov tin tsis txaus ntawm lub ncoo thiab lwm yam teeb meem.
03. Pad dav nqaim dua li tus pin ntaus ntawv
Qhov dav ntawm lub ncoo tsim yog nqaim dua li qhov dav ntawm cov khoom siv, thiab thaj tsam ntawm lub ncoo tiv tauj nrog cov khoom siv yog tsawg dua thaum SMT thaj ua rau thaj, uas yooj yim ua rau cov khoom sawv ntsug lossis tig.
04. Qhov ntev ntawm lub ncoo yog ntev tshaj li tus pin ntawm lub cuab yeej
Lub ncoo tsim yuav tsum tsis txhob ntev dhau ntawm tus pin ntawm cov khoom.Tshaj li ntawm ib qho kev sib tw, cov dej ntws ntau dhau thaum lub sij hawm SMT reflow vuam yuav ua rau cov khoom siv los rub tawm txoj hauj lwm offset rau ib sab.
05. Qhov sib nrug ntawm cov ntaub qhwv yog luv dua li ntawm cov khoom
Qhov teeb meem luv luv ntawm qhov sib txawv ntawm lub ncoo feem ntau tshwm sim hauv IC ncoo qhov sib nrug, tab sis qhov sib txawv ntawm qhov sib txawv ntawm lwm cov ntaub qhwv tsis tuaj yeem luv luv dua li tus pin qhov sib nrug ntawm cov khoom, uas yuav ua rau luv luv yog tias nws dhau ntawm qee qhov muaj nuj nqis.
06. Pin dav ntawm lub ncoo me me dhau
Nyob rau hauv SMT thaj ntawm tib lub ntsiab lus, qhov tsis xws luag hauv lub ncoo yuav ua rau cov khoom rub tawm.Piv txwv li, yog tias lub ncoo me dhau los yog ib feem ntawm lub ncoo me dhau, nws yuav tsis muaj tin los yog tsawg dua tin, uas ua rau muaj kev sib txawv ntawm ob qho kawg.
Cov xwm txheej tiag tiag ntawm cov pawm me me
Qhov luaj li cas ntawm cov ntaub qhwv tsis sib xws nrog qhov loj ntawm PCB ntim
Teeb meem piav qhia:Thaum ib yam khoom tsim nyob rau hauv SMT, nws pom tias inductance yog offset thaum lub sij hawm tom qab vuam kev soj ntsuam.Tom qab kev txheeb xyuas, nws pom tias cov khoom siv inductor tsis sib xws nrog cov ntaub qhwv.* 1.6mm, cov khoom yuav raug thim rov qab tom qab vuam.
Kev cuam tshuam:Kev sib txuas hluav taws xob ntawm cov khoom ua rau tsis zoo, cuam tshuam rau kev ua haujlwm ntawm cov khoom, thiab ua rau cov khoom tsis tuaj yeem pib ib txwm;
Extension ntawm qhov teeb meem:Yog tias nws tsis tuaj yeem yuav qhov loj tib yam li PCB ncoo, lub sensor thiab tam sim no kuj tuaj yeem ua tau raws li cov ntaub ntawv xav tau los ntawm Circuit Court, ces qhov kev pheej hmoo ntawm kev hloov lub rooj tsavxwm.
Post lub sij hawm: Apr-17-2023