Dzimwe nguva pachange paine imwe yakashata yekugadzirisa chiitiko mukuita kweSMT muchina, tin bead ndeimwe yacho, kugadzirisa dambudziko, tinofanira kutanga taziva chikonzero chedambudziko.Solder beading iri mune solder paste slump kana mukuita kudzvanya kunze kwepadhi kunoitika.Panguvareflow ovensoldering, solder paste inoparadzaniswa kubva kune main deposit uye yakabatanidzwa neakawandisa solder paste kubva kune mamwe mapedhi, angave achibuda kubva padivi rechikamu chemuviri kugadzira mabhero makuru, kana kuramba ari pasi pechikamu.Kubviswa kwesimbi mabheji kusvika pazvinobvira nekubviswa kwakananga kwenzira, mukugadzira nzira yekuteerera, inogona kudziviswa.Izvi zvinotevera kuongorora kuti ndeapi mamiriro achagadzira solder beading:
I. Steel Mesh
1. Simbi mesh kuvhurika zvakananga zvinoenderana nehukuru hwekuvhurwa kwepadhi kunotungamira kune tin bead phenomenon mukuita kwechigamba kugadzirisa.
2. Kana hupamhi hwemambure esimbi hwakanyanya, zvinogonawo kukonzera kuparara kwe solder paste, iyo ichaitawo mabheji etini.
3. Kana kumanikidzwa kwetora uye isa muchinayakanyanya kukwirisa, solder paste ichave nyore extruded kune solder kuramba layer pazasi chikamu, uye solder paste ichanyunguduka uye ichimhanya ichitenderedza chikamu kuti iite solder bead panguva yekuyerera kwevheni.
II.Iyo solder paste
1. Solder paste pasina tembiricha kudzoka kugadzirisa ari preheating padanho achapfapfaidza chiitiko kuburitsa tin beads.
2. Iyo diki diki saizi yehupfu hwesimbi mune solder paste, iyo yakakura nzvimbo yese yepasi peiyo solder paste, iyo inotungamirira kune yakakwirira oxidation dhigirii yehupfu hwakatsetseka, saka chiitiko che solder bead chinowedzera.
3. Iyo yakakwirira iyo oxidation dhigirii yehupfu hwesimbi mune solder paste, iyo yakakura simbi poda bonding kuramba panguva welding, solder paste uye padhi uye SMT zvikamu hazvisi nyore kupinda, zvichiita kuti kuderedzwa solderability.
4. Kuwanda kwekutsvaira uye kuwanda kwekushanda kwekushanda kwakanyanyisa, izvo zvinozoita kuti kuparara kwepanyika kwe solder paste uye tin beads.Kana chiitiko che flux chisina kukwana, iyo oxidized chikamu hachigone kubviswa zvachose, izvo zvinozotungamira kumarata mabheji mukugadziriswa kwechigamba chekugadzira fekitori.
5. Metal yemukati mukugadzirwa chaiko kwerata paste inowanzo 88% kusvika 92% yesimbi yemukati uye huwandu hwehuwandu, vhoriyamu reshiyo inenge 50%, kuwedzera simbi yemukati inogona kuita kuti simbi yeupfu hurongwa huve hwapedyo, kuitira kuti. zviri nyore kusanganisa kana ichinyunguduka.
Nguva yekutumira: Sep-18-2021