1. Nigute paste yo kugurisha ya SMT igira ingaruka kumiterere yo kugurisha?
Ikigereranyo cya flux hamwe nibigize abagurisha paste flux yibigize:
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.Hariho ibintu byinshi nkibi, cyane cyane amavuta ya castor, amavuta ya hydrogenated castor, Ethylene glycol mono butylene, na carboxymethyl selulose.
(4) Umuti: 3% ~ 7%, ibice byinshi, hamwe nibice bitandukanye.
(5) Abandi: surfactants, ibikoresho byo guhuza.
Ingaruka zo kugurisha paste flux yibigize ubuziranenge bwo kugurisha:
Amabati yamashanyarazi, flux spash, umupira wibitabo byumupira (BGA) ubusa, ikiraro, nibindi bikoresho bibi bya SMT gutunganya no gusudira bifitanye isano ikomeye nibigize paste yagurishijwe.Guhitamo ibicuruzwa byagurishijwe bigomba gutoranywa ukurikije inzira ziranga inteko yumuzunguruko wacapwe (PCBA).Ikigereranyo cyifu yifu igurisha igira uruhare runini mubikorwa bya improvingslump imikorere nubwiza.Iyo ifu yo kugurisha iri hejuru, niko kugabanuka.Kubwibyo, kugurisha ibicuruzwa byakoreshejwe mubice byiza bigomba gukoresha 88% ~ 92% byinshi byifu yifu yibicuruzwa bya paste.
1. Umukoresha agena solderability cyangwa wettability ya paste yagurishijwe.Kugirango ugere ku bicuruzwa byiza, hagomba kubaho activate ikwiye muri paste yuwagurishije, cyane cyane mubijyanye no kugurisha micro-pad, niba ibikorwa bidahagije, birashobora gutera imipira yinzabibu nudusimba twumupira.
2. Ibintu bikora firime bigira ingaruka ku gupima ingingo zagurishijwe hamwe nubwiza nubwiza bwa paste yagurishijwe.
3. Flux ikoreshwa cyane cyane mu gushonga abayikora, ibintu bikora firime, imiti ya thixotropique, nibindi.Intego yo gukoresha ibishishwa byinshi byo gutekesha ni ukurinda uwagurishije na flux kumeneka mugihe cyo kugurisha.
4. Thixotropic agent ikoreshwa mugutezimbere imikorere yo gucapa no gukora.
2. Nibihe bintu bigira ingaruka kumikorere yumusaruro wa SMT?
Umuzenguruko ushyiraho bivuga igihe bifata kugirango ibikoresho byo gushyira ibikoresho umutwe utangire kubara mugihe uwagaburiye atoraguye ibice, nyuma yo gutahura amashusho yibigize, cantilever yimukira kumwanya uhuye, umurongo wakazi ushyira ibice mubuyobozi bwa PCB. , hanyuma agasubira kumwanya wo kugaburira.Nibizunguruka;igihe cyakoreshejwe mukuzenguruka nicyiciro cyibanze cyingenzi kigira ingaruka kumuvuduko wimashini ishyira.Inzira yo gushyira mumashanyarazi yihuta ya mashini yo gushira kugirango ibashe kurwanya-capacitance ibice biri muri 1.0s.Kugeza ubu, gushyira SMT Umuzenguruko wa cantilever yihuta cyane mu nganda zitunganya chip ni 0.5s;inzinguzingo yo gushiraho IC nini, BGAs, umuhuza, hamwe na capacitori ya aluminium electrolytike ni 2s.
Ibintu bigira ingaruka kumurongo wimyanya:
Igipimo cyo guhuza ibice byo gutoranya ibice (ni ukuvuga inkoni nyinshi zihuza inkingi yumutwe washyizwe hejuru kandi ikagwa icyarimwe kugirango ifate ibice).
Ingano yubuyobozi bwa PCB (nini nini yubuyobozi bwa PCB, nini nini ya X / Y igenda yumutwe wumutwe, nigihe kinini cyakazi).
Igipimo cyo guta ibice (niba ibice bigize ishusho yibice bidashyizweho neza, guta ibikoresho hamwe nibikorwa X / Y bitemewe bizabaho mugihe cyo kumenyekanisha amashusho yo gukuramo ibice).
Igikoresho gishyiraho umuvuduko wimikorere agaciro X / Y / Z / R.
3. Nigute ushobora kubika neza no gukoresha paste yo kugurisha muruganda rutunganya ibicuruzwa bya SMT?
1. Iyo paste yo kugurisha idakoreshwa, igomba kubikwa muri firigo, kandi ubushyuhe bwayo bugomba kuba buri hagati ya 3 ~ 7 ° C.Nyamuneka menya ko paste yagurishijwe idashobora gukonjeshwa munsi ya 0 ° C.
2. Hagomba kubaho termometero yabugenewe muri firigo kugirango umenye ubushyuhe bwabitswe buri masaha 12 hanyuma ukore inyandiko.Therometero igomba kugenzurwa buri gihe kugirango ikumire kunanirwa, kandi hagomba gukorwa inyandiko zijyanye.
3. Mugihe ugura paste yagurishijwe, birakenewe ko wandika itariki yo kugura kugirango utandukanye ibyiciro bitandukanye.Ukurikije gahunda yo gutunganya chip ya SMT, birakenewe kugenzura imikoreshereze yimyenda ya paste, kandi ibarura rusange rigenzurwa muminsi 30.
4. Ububiko bwa paste bugurishwa bugomba kubikwa ukurikije ubwoko butandukanye, umubare wibyiciro, nababikora bitandukanye.Nyuma yo kugura paste yagurishijwe, igomba kubikwa muri firigo, kandi ihame rya mbere-ryambere, rigomba gukurikizwa.
4. Ni izihe mpamvu zo gusudira gukonje mugutunganya PCBA
1. Ubushyuhe bwo kugabanuka buri hasi cyane cyangwa igihe cyo gutura ubushyuhe bwo kugurisha bugufi ni bugufi cyane, bigatuma ubushyuhe budahagije mugihe cyo kugaruka no gushonga bituzuye byifu yicyuma.
2. Mu cyiciro cyo gukonjesha, umwuka ukomeye wo gukonjesha, cyangwa kugenda kwumukandara wa convoyeur utaringaniye uhungabanya ingingo zagurishijwe, kandi ugaragaza imiterere itaringaniye hejuru yumutwe wabagurishije, cyane cyane ku bushyuhe buri munsi gato yo gushonga, iyo ugurisha biroroshye cyane.
3. Kwanduza hejuru yubutaka no kumpande cyangwa kurongora birashobora kubuza ubushobozi bwa flux, bikavamo kugaruka kutuzuye.Rimwe na rimwe, ifu yo kugurisha idashonga irashobora kugaragara hejuru yumugurisha.Muri icyo gihe, ubushobozi bwa flux budahagije nabwo bizavamo gukuraho burundu okiside yicyuma hamwe na kondegene ituzuye.
4. Ubwiza bwifu yicyuma cyagurishijwe ntabwo ari bwiza;inyinshi murizo zakozwe na encapsulation ya piside ya okiside cyane.
5. Nigute wasukura inteko ya PCB muburyo bwizewe kandi bunoze
Isuku yinteko ya PCB igomba gukoresha isuku ikwiye kandi isukuye, biterwa nibisabwa ninama.Hano, inzira zitandukanye zo gusukura PCB nibyiza nibibi byerekanwe.
1. Ultrasonic PCB Isukura
Isuku ya ultrasonic PCB isukura PCB yambaye ubusa bidasukuye umusemburo, kandi ubu ni uburyo bwubukungu bwa PCB bwubukungu.Uretse ibyo, ubu buryo bwo gukora isuku ntibubuza ingano ya PCB cyangwa ubwinshi.Ariko, ntishobora kweza inteko ya PCB kuko ultrasonic irashobora kwangiza ibice bya elegitoroniki ninteko.Ntishobora kandi guhanagura ikirere / kwirwanaho PCB kuko ultrasonic irashobora kugira ingaruka kumashanyarazi.
2. Byuzuye Automatic Kumurongo PCBA
Byuzuye byikora kumurongo PCBA isukura birakwiye koza ingano nini yinteko ya PCB.PCB na PCBA byombi birashobora gusukurwa, kandi ntibizagira ingaruka kubibaho.PCBAs inyura mu myobo itandukanye yuzuye kugirango irangize inzira yo gusukura amazi ashingiye kumiti, koza amazi, kumisha, nibindi.Ubu buryo bwo gukora isuku ya PCBA busaba umusemburo kugirango uhuze nibigize, ubuso bwa PCB, mask yo kugurisha, nibindi kandi tugomba no kwitondera ibice byihariye mugihe bidashobora gukaraba.Ikirere hamwe nubuvuzi bwo mu rwego rwa PCB birashobora gusukurwa murubu buryo.
3. Igice cya Automatic PCBA Isukura
Bitandukanye na PCBA isukura kumurongo, igice cyikora-cyuma gishobora gutwarwa nintoki ahantu hose kumurongo wateraniye, kandi gifite cavit imwe gusa.Nubwo ibikorwa byayo byogusukura ari kimwe nogusukura PCBA kumurongo, inzira zose zibaho mumwobo umwe.PCBAs igomba gukosorwa na fixture cyangwa igashyirwa mubiseke, kandi ubwinshi bwayo ni buke.
4. Intoki PCBA
Intoki PCBA isukura ikwiranye na PCBA ntoya isaba MPC isukura.PCBA irangiza gusukura amazi ashingiye kumazi mu bwogero buhoraho.
Duhitamo uburyo bukwiye bwo gusukura PCBA bitewe nibisabwa PCBA.