He aha te hanganga o te oumu reflow?

NeoDen IN12

Rerenga umuka whakamahia ki te whakakoi i nga waahanga papaki papa iahiko ki rotoraina hanga SMT.Ko nga painga o te miihini whakahiato reflow he ngawari te whakahaere i te pāmahana, ka karohia te hauhautanga i te wa e mahi ana, ka ngawari ake te whakahaere i nga utu whakangao.He ara iahiko whakamahana kei roto i te oumu reflow, ka whakamahanahia te hauota ki te teitei o te pāmahana katahi ka pupuhihia ki te papa taiawhio kua piri ki nga waahanga, kia rewa ai te konuhono i nga taha e rua o nga waahanga ka piri ki te papahoahoa.He aha te hanganga o te oumu reflow?Tirohia nga mea e whai ake nei:
Ko te oumu reflow te nuinga tito o te pūnaha rere rangi, pūnaha whakawera, pūnaha tautauā, pūnaha tuku, pūnaha whakaora rere, maimoatanga hau ngenge me te taputapu whakaora, potae rangi pehanga whakaara taputapu, taputapu ngenge me etahi atu hanganga me te hanga hanga.

I. Pūnaha rere hau o te umu reflow
Ko te mahi o te punaha rere o te hau ko te kaha o te convection, tae atu ki te tere, te rere, te wai me te uruhanga.

II.Reflow oumu pūnaha whakawera
Ko te punaha whakamahana he motini hau wera, ngongo whakawera, thermocouple, reera ahua totoka, taputapu whakahaere pāmahana me etahi atu.

III.Pūnaha whakamahana orerere umu
Ko te mahi o te punaha whakamahana ko te whakamatao tere i te PCB kua wera.E rua nga huarahi: te whakamatao hau me te whakamatao wai.

IV.Pūnaha taraiwa miihini whakakoi
Kei roto i te punaha tuku te whitiki mata, te tereina arahi, te tautoko pokapū, te mekameka, te motuka waka, te hanganga whakatikatika whanui ara, te tikanga whakahaere tere kawe me etahi atu waahanga.

V. Pūnaha whakaora Flux mo te reflow umu
Ko te punaha whakaora hau rewharewha he rite rawa ki te whakaetonga, na roto i te evaporator ka whakamahana i te hau pau ki te neke atu i te 450 ℃, ka rere te rere o te hau, katahi te miihini whakamahana wai i muri i te hurihanga i roto i te evaporator, ka rere ma te tangohanga powhiri o runga, na roto i te rere wai whakamahana whakaeo ki te tank whakaora.

VI.Te maimoatanga hau para me te taputapu whakaora o te oumu reflow
Ko te kaupapa o te maimoatanga hau me te taputapu whakaora te nuinga e toru nga waahanga: nga whakaritenga tiaki taiao, kaua e tuku tika te rere ki te rangi;Ko te pakari me te rerenga o te hau para i roto i te oumu reflow ka pa ki te rere o te hau wera me te whakaiti i te pai o te convection, no reira me hangarua.Mena ka tohua he oumu hauota reflow, hei whakaora i te hauota, me hangarua te hauota.Me whai rawa te punaha whakaora hau rewharewha.

VII.Te pehanga hau whakaarahanga taputapu o te reflow whakapiri mihini ki te uhi o runga
Ko te uhi o runga o te oumu whakapiringa reflow ka taea te whakatuwhera i te katoa ki te whakahaere i te horoi o te oumu whakapiri reflow.Ka taka te pereti i te wa e tiaki ana, e whakaputa ana ranei i te oumu whakarewa reflow, me whakatuwhera te uhi o runga o te oumu whakapiri reflow.

VIII.Reflow hangahanga hanga miihini whakakoi
Ko te hanganga o waho ka paiherea e te pepa whakarewa.