Ibisanzwe Sn96.5Ag3.0Cu0.5 alloy gakondo idafite isasu-yubusa kugurisha ubushyuhe bwo kugabanuka.A ni ahantu hashyuha, B nubushuhe buhoraho (ahantu h'ubushuhe), na C ni agace gashonga.Nyuma ya 260S ni agace gakonje.
Sn96.5Ag3.0Cu0.5 alloy gakondo gakondo idafite ubuntu kugarura ubushyuhe bwo kugabanuka
Intego yo gushyushya zone A ni ugushyushya byihuse ikibaho cya PCB kugeza ubushyuhe bwa flux.Ubushyuhe buzamuka kuva mubushyuhe bwicyumba bugera kuri 150 ° C mumasegonda 45-60, kandi ahahanamye hagomba kuba hagati ya 1 na 3. Niba ubushyuhe buzamutse vuba cyane, burashobora gusenyuka bikaviramo inenge nkamasaro yabagurisha hamwe nikiraro.
Agace k'ubushyuhe gahoraho B, ubushyuhe buzamuka buhoro kuva kuri 150 ° C kugeza kuri 190 ° C.Igihe gishingiye ku bicuruzwa byihariye bisabwa kandi bigenzurwa nko mu masegonda 60 kugeza kuri 120 kugirango bitange byuzuye kubikorwa bya flux solvent no kuvanaho okiside hejuru yubudozi.Niba igihe ari kirekire, gukora cyane birashobora kubaho, bigira ingaruka kumiterere yo gusudira.Kuri iki cyiciro, agent ikora muri flux solvent itangira gukora, hanyuma resin resin itangira koroshya no gutemba.Umukozi ukora arakwirakwira kandi akinjira hamwe na rosin resin kuri padi ya PCB hamwe no kugurisha amaherezo yikigice, kandi igahuza na oxyde yubuso bwa padi hamwe nigice cyo kugurisha igice.Igisubizo, gusukura hejuru kugirango usudwe kandi ukureho umwanda.Muri icyo gihe, resin resin yaguka vuba kugirango ikore firime ikingira kurwego rwinyuma rwo gusudira kandi ikayitandukanya no guhura na gaze yo hanze, ikarinda ubuso bwa okiside.Intego yo gushiraho ubushyuhe buhoraho burigihe ni ukwemerera padi ya PCB nibice bigera kubushyuhe bumwe mbere yo kugurisha no kugabanya ubushyuhe, kuko ubushobozi bwo kwinjiza ubushyuhe bwibice bitandukanye byashyizwe kuri PCB buratandukanye cyane.Irinde ibibazo byubuziranenge biterwa nubusumbane bwubushyuhe mugihe cyo kugaruka, nk'amabuye y'imva, kugurisha ibinyoma, nibindi. Niba akarere gahoraho k'ubushyuhe gashyushye vuba, flux muri paste yagurishijwe izaguka byihuse kandi ihindagurika, bitera ibibazo bitandukanye byubuziranenge nka pore, guhuha amabati, n'amasaro.Niba ubushyuhe burigihe burigihe ari kirekire cyane, flux solvent izumuka cyane kandi itakaza ibikorwa byayo numurimo wo gukingira mugihe cyo kugurisha ibintu, bikavamo urukurikirane rwingaruka mbi nko kugurisha ibintu bisanzwe, ibisigazwa byumukara bisigara hamwe, hamwe nabagurisha batuje.Mu musaruro nyirizina, igihe cy'ubushyuhe gihoraho kigomba gushyirwaho ukurikije ibiranga ibicuruzwa nyirizina hamwe na paste idafite ibicuruzwa.
Igihe gikwiye cyo kugurisha zone C ni amasegonda 30 kugeza 60.Igihe gito cyane cyo gushonga amabati arashobora gutera inenge nko kugurisha intege nke, mugihe umwanya muremure ushobora gutera ibyuma birenze urugero bya dielectric cyangwa umwijima uhuza abagurisha.Kuri iki cyiciro, ifu yivanze muri paste yagurishijwe irashonga kandi ikora hamwe nicyuma hejuru yagurishijwe.Amashanyarazi ya flux atetse muriki gihe kandi yihutisha guhindagurika no gucengera, kandi akanesha impagarara zubushuhe hejuru yubushyuhe bwo hejuru, bigatuma umugurisha wamazi yamazi atembera hamwe na flux, bikwirakwira hejuru yumupaka hanyuma ugapfundikanya igice cyanyuma cyigice kugirango kibeho. Ingaruka.Mubyukuri, uko ubushyuhe buri hejuru, ningaruka nziza.Ariko, mubikorwa bifatika, kwihanganira ubushyuhe ntarengwa bwubuyobozi bwa PCB nibice bigomba kwitabwaho.Guhindura ubushyuhe nigihe cyahantu hagurukira kugurisha ni ugushakisha uburinganire hagati yubushyuhe bwo hejuru ningaruka zo kugurisha, ni ukuvuga kugirango ugere ku bwiza bwiza bwo kugurisha mubushyuhe bwemewe nigihe.
Nyuma yo gusudira ni akarere gakonje.Muri iki cyiciro, umugurisha arakonja kuva mumazi kugeza kumurongo kugirango habeho guhuza ibicuruzwa, kandi ibinyampeke bya kirisiti bibumbira imbere mubigurisha.Gukonjesha byihuse birashobora kubyara ibicuruzwa byizewe hamwe nurumuri rwinshi.Ni ukubera ko gukonjesha byihuse bishobora gutuma uwagurishije ahurira hamwe akomatanya kandi afite imiterere ihamye, mugihe umuvuduko wo gukonjesha buhoro uzatanga umusaruro mwinshi kandi ugakora ibinyampeke binini hejuru yuburinganire.Ubwizerwe bwimbaraga za mashini zuruganda ruri hasi, kandi Ubuso bwumugurisha buzaba bwijimye kandi buke muburabyo.
Gushiraho icyerekezo-kitagabanije kugurisha ubushyuhe
Muburyo bwo kugurisha ibicuruzwa bitarimo isasu, ubuvumo bugomba gutunganywa uhereye kumpapuro zose.Niba itanura ry itanura rikozwe mubice bito byamabati, kurigata kwaka itanura bizoroha mugihe cy'ubushyuhe bwo hejuru butagira isasu.Birakenewe cyane kugerageza inzira ibangikanye n'ubushyuhe buke.Niba inzira ihinduwe mubushyuhe bwinshi bitewe nibikoresho nigishushanyo, kuvanga no kugwa kubibaho ntibishobora kwirindwa.Mubihe byashize, Sn63Pb37 yayoboye umugurisha yari umugurisha rusange.Amavuta ya Crystalline afite aho ahurira hamwe n'ubushyuhe bwo gukonjesha, byombi 183 ° C.Isoko ridafite ibicuruzwa bigurishwa bya SnAgCu ntabwo ari eutectic alloy.Ikibanza cyacyo cyo gushonga ni 217 ° C-221 ° C.Ubushyuhe burakomeye iyo ubushyuhe buri munsi ya 217 ° C, n'ubushyuhe buba butemba iyo ubushyuhe buri hejuru ya 221 ° C.Iyo ubushyuhe buri hagati ya 217 ° C na 221 ° C Amavuta yerekana imiterere idahungabana.
Igihe cyo kohereza: Ugushyingo-27-2023