Mgbe anyị na-ekwu maka beading solder, anyị kwesịrị ibu ụzọ kọwaa ntụpọ SMT nke ọma. The tin bead na-hụrụ na reflow welded efere, na ị nwere ike ịgwa na a ilekiri na ọ bụ nnukwu tin bọọlụ agbakwunyere na ọdọ mmiri nke flux positioned n'akụkụ discrete components na nnọọ ala ala elu, dị ka mpempe akwụkwọ resistors na capacitors, mkpa. obere ngwugwu profaịlụ (TSOP), obere transistors profaịlụ (SOT), transistors D-PAK, na mgbakọ ndị na-eguzogide. N'ihi ọnọdụ ha n'ihe metụtara akụkụ ndị a, a na-akpọkarị bead tin dị ka "satellites".
Tin beads ọ bụghị nanị na-emetụta ọdịdị nke ngwaahịa ahụ, ma nke ka mkpa, n'ihi njupụta nke components na efere e biri ebi, e nwere ihe ize ndụ nke obere sekit nke akara n'oge ojiji, si otú na-emetụta àgwà nke electronic ngwaahịa. Enwere ọtụtụ ihe kpatara imepụta bead tin, nke na-abụkarị otu ma ọ bụ karịa ihe kpatara ya, yabụ anyị ga-arụ ezigbo ọrụ mgbochi na imeziwanye ka anyị wee nwee ike ịchịkwa ya nke ọma. Isiokwu na-esonụ ga-atụle ihe ndị na-emetụta mmepụta tin beads na ihe ndị a na-eme iji belata mmepụta nke tin beads.
Gịnị mere tin beads ji eme?
N'ikwu ya n'ụzọ dị mfe, tin beads na-ejikọta ya na nnukwu ihe nkwụnye ego nke solder, n'ihi na ọ nweghị "ahụ" ma na-amanye ya n'okpuru ihe ndị dị iche iche na-emepụta beads tin, na mmụba nke ọdịdị ha nwere ike ịsị na mmụba nke ojiji nke rinsed. - na solder mado. Mgbe a na-etinye ihe mgbawa n'ime tapawa solder nke a na-ekpochapụ, ihe nkedo ahụ na-enwe ike ịpịnye n'okpuru akụrụngwa. Mgbe tapawa solder echekwabara dị ukwuu, ọ dị mfe extrusion.
Isi ihe na-emetụta mmepụta tin beads bụ:
(1) Imeghe ihe ngosi na mpe mpe akwa
(2) Nchacha ihe ndebiri
(3) Nkwughachi ziri ezi nke igwe
(4) Ọnọdụ okpomọkụ nke reflow reflow
(5) Nrụgide ihe mgbochi
(6) ihe na-esi nri n'èzí pan
(7) The ọdịda elu nke tin
(8) Ntọhapụ gas nke ihe ndị na-agbanwe agbanwe na efere akara na oyi akwa na-eguzogide solder
(9) metụtara mgbanwe
Ụzọ iji gbochie mmepụta tin beads:
(1) Họrọ eserese pad kwesịrị ekwesị na nha nha. Na n'ezie mpe mpe akwa imewe, kwesịrị ikpokọta na PC, na mgbe ahụ dị ka n'ezie akụrụngwa ngwugwu size, ịgbado ọkụ ọgwụgwụ size, chepụta kwekọrọ ekwekọ mpe mpe akwa size.
(2) Lezienụ anya na mmepụta nke nchara ígwè. Ọ dị mkpa ka ịhazigharị nha oghere dị ka nhazi akụrụngwa akọwapụtara nke bọọdụ PCBA iji jikwaa ọnụọgụ mbipụta nke tapawa solder.
(3) A na-atụ aro ka bọọdụ efu PCB nwere BGA, QFN na akụkụ ukwu dị na bọọdụ mee ihe siri ike sie ike. Iji hụ na e wepụrụ mmiri dị n'elu efere a na-ere ihe iji mee ka weldability dịkwuo elu.
(4) Melite ogo nke nchacha template. Ọ bụrụ na ihicha adịghị ọcha. Mwepụta solder mado na ala nke template oghere ga-agbakọta na nso template oghere na-etolite ukwuu solder mado, na-eme ka tin beads.
(5) Iji hụ na a na-emegharị ngwa ahụ. Mgbe a na-ebipụta tapawa solder, n'ihi nkwụsị n'etiti template na pad, ọ bụrụ na nkwụsị ahụ buru ibu, a ga-etinye pasta ahụ n'èzí na pad, na tin beads ga-apụta ngwa ngwa mgbe kpochara.
(6) Jikwaa nrụgide na-ebuli elu nke igwe igwe. Ma etinyere ọnọdụ njikwa nrụgide, ma ọ bụ njikwa ọkpụrụkpụ akụrụngwa, ọ dị mkpa ka edozie ntọala ahụ iji gbochie beads gbamgbam.
(7)Welite ọnọdụ okpomọkụ. Jikwaa okpomọkụ nke ịgbado ọkụ reflow, nke mere na ihe mgbaze nwere ike gbanwee n'elu ikpo okwu ka mma.
Elela anya na "satellite" dị obere, enweghị ike ịdọrọ ya, dọpụta ahụ dum. Na ngwá electronic, ekwensu na-abụkarị na nkọwa. Ya mere, na mgbakwunye na uche nke usoro mmepụta pesonel, mkpa ngalaba kwesịrị ịdị na-arụsi ọrụ ike na-arụkọ ọrụ, na-ekwurịta okwu na usoro pesonel na oge maka mgbanwe ihe onwunwe, nnọchi na ihe ndị ọzọ iji gbochie mgbanwe na usoro parameters kpatara ihe onwunwe mgbanwe. Onye mmebe na-ahụ maka imewe sekit PCB kwesịkwara ịgwa ndị ọrụ usoro okwu, rụtụ aka na nsogbu ma ọ bụ aro ndị ọrụ na-enye ma melite ha dịka o kwere mee.
Oge nzipu: Jan-09-2024
