Kugurisha ibicuruzwa nuburyo bukoreshwa cyane muburyo bwo gusudira muburyo bwa SMT.Ubundi buryo bwo gusudira ni kugurisha umuyaga.Kugurisha ibicuruzwa bikwiranye nibice bya chip, mugihe kugurisha imiraba bikwiranye nibikoresho bya elegitoroniki.
Kugurisha kugurisha nabyo ni inzira yo kugurisha.Ihame ryayo ni ugucapa cyangwa gutera inshinge zikwiye zo kugurisha kuri padi ya PCB hanyuma ugashyiraho ibice bikwiranye na SMT yamashanyarazi, hanyuma ugakoresha ubushyuhe bwumuyaga ushushe wo gushyushya itanura ryerekana kugirango ushonge paste yabagurishije, hanyuma amaherezo ugire uruganda rwizewe binyuze mu gukonjesha.Huza ibice hamwe na PCB kugirango ukine uruhare rwo guhuza imashini no guhuza amashanyarazi.Muri rusange, kugurisha ibicuruzwa bigabanijwemo ibyiciro bine: gushyushya, ubushyuhe burigihe, kugaruka no gukonja.
1. Agace gashyuha
Agace gashyushya: nicyiciro cyambere cyo gushyushya ibicuruzwa.Intego yacyo ni ugushyushya vuba ibicuruzwa mubushyuhe bwicyumba no gukora ibicuruzwa bya paste flux.Muri icyo gihe, ni nuburyo bukenewe bwo gushyushya kugirango wirinde gutakaza ubushyuhe buke bwibice biterwa nubushyuhe bwihuse bwihuse mugihe cyo kwibiza amabati.Kubwibyo, ingaruka zo kuzamuka kwubushyuhe kubicuruzwa ni ngombwa cyane kandi bigomba kugenzurwa mugihe gikwiye.Niba byihuta cyane, bizatanga ubushyuhe bwumuriro, PCB nibigize bizaterwa nubushyuhe bwumuriro kandi bitere kwangirika.Muri icyo gihe, ibishishwa muri paste yabagurisha bizahinduka vuba kubera ubushyuhe bwihuse, bikavamo kumeneka no gushiraho amasaro yagurishijwe.Niba itinda cyane, kugurisha paste solvent ntishobora guhindagurika byuzuye kandi bigira ingaruka kumiterere yo gusudira.
2. Ubushuhe buhoraho
Agace gahoraho k'ubushyuhe: intego yacyo ni uguhindura ubushyuhe bwa buri kintu kuri PCB no kugera ku masezerano ashoboka kugirango igabanye itandukaniro ry'ubushyuhe hagati ya buri kintu.Kuri iki cyiciro, igihe cyo gushyushya cya buri kintu ni kirekire, kuko ibice bito bizagera kuburinganire mbere kubera ubushyuhe buke, kandi ibice binini bikenera igihe gihagije cyo gufata ibice bito bitewe nubushyuhe bwinshi, kandi byemeza ko flux mugurisha paste irahinduka rwose.Kuri iki cyiciro, munsi yibikorwa bya flux, oxyde kuri padi, umupira ugurisha hamwe na pin yibigize bizakurwaho.Muri icyo gihe, flux nayo izakuraho irangi ryamavuta hejuru yikintu na padi, byongere aho gusudira kandi birinde ibice bitazongera okiside.Nyuma yiki cyiciro, ibice byose bigomba gukomeza ubushyuhe bumwe cyangwa busa, bitabaye ibyo gusudira nabi bishobora kubaho kubera itandukaniro ryubushyuhe bukabije.
Ubushyuhe nigihe cyubushyuhe burigihe biterwa nuburyo bugoye bwo gushushanya PCB, itandukaniro ryubwoko bwibigize numubare wibigize.Mubisanzwe byatoranijwe hagati ya 120-170 ℃.Niba PCB igoye cyane, ubushyuhe bwa zone yubushyuhe burigihe bugomba kugenwa nubushyuhe bwa rosin bworoshe nkibisobanuro, kugirango ugabanye igihe cyo gusudira cya zone yo kugaruka mubice bikurikira.Ubushuhe buhoraho bwa societe yacu muri rusange bwatoranijwe kuri 160 ℃.
3. Agace kagaruka
Intego ya zone yerekana ni ugukora paste yagurishijwe gushonga no guhanagura padi hejuru yikintu cyo gusudira.
Iyo ikibaho cya PCB cyinjiye muri zone yerekana, ubushyuhe buzamuka vuba kugirango paste igurisha igere kumashanyarazi.Ingingo yo gushonga ya sisitemu yo kugurisha paste SN: 63 / Pb: 37 ni 183 ℃, hamwe na paste itagabanije kugurisha SN: 96.5 / ag: 3 / Cu: 0. Ingingo yo gushonga ya 5 ni 217 ℃.Muri iki gice, umushyushya utanga ubushyuhe bwinshi, kandi ubushyuhe bwitanura buzashyirwa hejuru, kugirango ubushyuhe bwa paste bugurisha buzamuke vuba kugeza ku bushyuhe bwo hejuru.
Ubushyuhe bwo hejuru bwo kugurisha kugarukira kugenwa muri rusange bigenwa nu gushonga kwa paste yagurishijwe, ikibaho cya PCB hamwe nubushyuhe bwihanganira ubushyuhe bwibigize ubwabyo.Ubushyuhe bwo hejuru bwibicuruzwa ahantu hagarukira buratandukana ukurikije ubwoko bwabacuruzi bakoresheje.Muri rusange, ubushyuhe ntarengwa bwo hejuru ya paste idafite ibicuruzwa bigurishwa muri rusange ni 230 ~ 250 ℃, naho ibya paste yo kugurisha isasu ni 210 ~ 230 ℃.Niba ubushyuhe bwo hejuru buri hasi cyane, biroroshye kubyara gusudira gukonje hamwe no kudahaza bihagije kubagurisha;Niba ari muremure cyane, epoxy resin ubwoko bwa substrate hamwe nibice bya plastike bikunda kokoka, PCB ifuro ifuro no kuyisenya, kandi bizanatuma habaho kwibumbira mubyuma bya eutectic birenze urugero, bigatuma umugurisha agabanuka kandi imbaraga zo gusudira zikagira intege nke, bikagira ingaruka kuri imiterere yubukorikori bwibicuruzwa.
Twakagombye gushimangira ko flux muri paste yagurishijwe ahantu hagarukira bifasha mukuzamura ubushuhe hagati yuwagurishije hamwe nudusanduku two gusudira no kugabanya ubukana bwubuso bwa paste yagurishijwe muriki gihe, ariko kuzamura flux bizabikora kwifata kubera ogisijeni isigaye hamwe na oxyde yo hejuru yicyuma mu itanura ryerekana.
Mubisanzwe, ubushyuhe bwiza bwitanura bugomba guhura ko ubushyuhe bwo hejuru bwa buri ngingo kuri PCB bugomba kuba buhoraho uko bishoboka, kandi itandukaniro ntirishobora kurenga dogere 10.Gusa murubu buryo turashobora kwemeza ko ibikorwa byose byo gusudira byarangiye neza mugihe ibicuruzwa byinjiye ahantu hakonje.
4. Agace gakonje
Intego ya zone ikonjesha ni ugukonjesha byihuse uduce duto duto two kugurisha hanyuma tugahita dukora uduce twinshi two kugurisha hamwe na radiyo itinda kandi byuzuye amabati.Kubwibyo, inganda nyinshi zizagenzura neza ahantu hakonje, kuko zifasha kugurisha hamwe.Muri rusange, umuvuduko ukonje cyane bizatuma bitinda cyane ko paste yagurishijwe yashonze gukonjesha no gukonjesha, bikavamo umurizo, gukarisha ndetse no gutobora ibice byashizwe hamwe.Igipimo gito cyo gukonjesha kizatuma ibikoresho fatizo byubuso bwa PCB byinjizwa muri paste yuwagurishije, bigatuma uwagurishije ahuriweho bikabije, gusudira ubusa hamwe nuwagurishije umwijima.Ikirenzeho, ibinyamakuru byose byicyuma kumurongo ugurisha bizashonga kumwanya wabagurishije, bikaviramo kwangwa gutose cyangwa gusudira nabi kuruhande rwibicuruzwa, bigira ingaruka kumiterere yo gusudira, bityo igipimo cyiza cyo gukonjesha ningirakamaro cyane kubagurisha hamwe .Muri rusange, uwagurishije paste utanga ibicuruzwa azagurisha igiciro cyo kugurisha hamwe ≥ 3 ℃ / s.
Inganda za Chengyuan nisosiyete izobereye mugutanga ibikoresho byumurongo wa SMT na PCBA.Iraguha igisubizo kiboneye.Ifite imyaka myinshi yumusaruro hamwe nuburambe bwa R & D.Abatekinisiye babigize umwuga batanga ubuyobozi bwo kwishyiriraho na nyuma yo kugurisha inzu ku nzu, kugirango udahangayika murugo.
Igihe cyo kohereza: Apr-09-2022