Whakariterite āhuatanga me te whakapai hāpai o te pēki tūtae

Mōhiotia ai te whakaaetanga me te haurapa o te pūtauira poraka

Ko te pūhoro whakapā kei roto i ngā take tuatahi e rua: te toiora me te pūtau, ā, he take nui tonu hoki tō rātou mahi i roto i te haurite me te tirotiro o te whakapā. Ko te toiora e whakawhanake ana i te hononga mīhini i waenganui i ngā kōmponenti, e whakarite ana i tēnā ko SnAgCu hei whakamahere kore-parekura, ēngari ko te pūtau e tango ana i ngā rākau oksida, e whai wāhi ana ki te whakatika i te whakapae. Ko ngā raraunga e whakaatu nei ko te whakapā pūhoro matua ka whakatangitanga haeremai i te whanaketanga o te tahuhu, me te whakamārie ake i ngā hononga kōmponenti. Hei tauira, ko ngā rangahau e whakaatu nei ko te toiora e whakarite ana pai ko SnAgCu ka whakapai i te tirotiro o te tahuhu i roto i ngā taiao kino nui, e whakaatu ana i te nui o te mahi a ia take i roto i te mahi whakapā.

Ko ētahi atu pūnaha haku mea ngā kaiwhakamahi i whakamahi ai ki roto i te miro poraka, ā, he taonga wētahi pai ake mō ia tūranga. Mō ngā hiahia whakauru huringa-ūa nui, e whakanui ana te hauropi SnAgCu nā tana āheinga ki te whakatika, nō reira ka whai take te whare rūngarunga i ngā hauropi iti whakatika hei whakapakari me te whakapono. Nui rawa ngā huinga o te haku pai; ko ngā tohutohu whenua e whakapā ke ana i te nui o te mahi ki te kawe i ngā whakaaetanga e taea ana ki ngā hiahia mahi takitahi hei whakamana i te hiranga hokohoko tino pai me te roa.

Te flux i roto i te solder paste ka taea pea te whakangungu o te pūtake wetting, ā, ka whai wāhi hoki i te whakapakari tūmatawhānui mō te wā e hīkina ana hei whakahē i te oxidation. Nā ngā momo flux e rerekē ana, pērā i te no-clean me te water-soluble, ka whakaaro whakamua te haurongo me te taumata o ngā residue. Hei tauira, ko ngā flux no-clean he pai tonu mō ngā wāhanga kei whea kia kore ai te whanake i muri i te soldering, nā te mea ko ngā flux water-soluble ka mahi pai ki te motu i ngā residue, ā, ka taea te whakamahere i te horoi me te tupeka o ngā hononga solder.

Ka taea e ngā kaihanga te whakatipu i ngā whakaaetanga o te poraka uhi ki te pai ake i a rātou tono ā-wae, pērā i te whakapai i te tuku me te tirotiro iti i ngā momo hapa. He whakahau kia mahi take raurangi rānei, he whakamahere i ngā whakaaetanga poraka hei whakarite i ngā wāhi whāinga, pērā i te wea tuawhenua me te tikanga whakatakoto. Ki te mōhio me te whakarerekē i ngā āhuatanga o te poraka, ka taea e ngā kaihanga te whakatū mai i ngā paihere nui i roto i ō rātou mahi uhi, e whakamana ana i te whaiwhai me te pai o te kaihoko.

Nga Taumata e Whai Ake nei i te Waihotanga o te Poraka Uhi

Kua whai wāhi nui te waihotanga o te poraka uhi i te whakahaere matihiko e pa ana i tana kotekote me te thixotropy. Ko te kotekote pai e hiahia ana kia whai mana hei whakamana i te tuku pai o te poraka uhi ki runga i ngā PAK, ka tohe i ngā hapa pērā i ngā pūtahi uhi, te uhi iti, rānei ko te kaiwhakapuaki. I whakaae ana tēnā Rush PCB , te arai i te pūkohu me te whakamahi i ngā rautaki matatika ka taea te whakapakari i te whanaketanga o te pūkohu. Ko te tuhinga o te thixotropic he mea nui hoki, e tohu ana i te wā kua kitea te pūkohu i tana hokinga ki tana pūkohutanga i mua i te āki, e hiahia ana ki te whakamātau i te wheiropu o te pūnaha. Ko ngā kauwhata e whakaatu nei i ngā raumati pai mō te pūkohutanga ka taea te whakamarama i ēnei hononga, nā te mea ko te pūkohutanga rite rawa ko te mea nui hei whakarite i ngā taunga herehere kei te kino.

Ko te rahinga o te tuhi e pa ana i te maha o ngā taunga herehere kua tae ki te pūkohu, me te rahinga o te squeegee e pa ana i roto. Ko ngā rahinga haere tinorau ka puta mai ngā take pērā i te tirotiro hokitu iti ranei, ko te kore hoki o te whakangungu pai, ka taea pea te whakawhenua i ngā momo herehere i runga i te whakahaere. Ko ngā tauaromai whakamātau e whakaatu nei ko te whakatika i ngā rahinga tuhi i roto i ngā raumati pai ka taea te whakapai i te pai o ngā hononga herehere me te whakapono. Ko ngā whakatikatika i whakaae ai i te whakarite i te pūkohu me ngā tikanga whakamahere, ka taea te whakapakari i ngā tuhi pai me te whakaiti i ngā taunga herehere.

He hēninga nui ngā whirihoranga pūnaha mō te mīhini, pērā i te kawe me te ātakura, hei whai wāhi i te tino pai ake i te whakamahi o te poraka uku. He whai hua tētahi kawe e taea ai te mahi o te rākau ki uta, engari ko te nui rawa atu o te kawe ka kitea he iti rawa atu o te uku, ahakoa ko te iti rawa atu ka noho papa tonu. Kia tiakina ēnei whirihoranga, nā te mea he rite tārewa rātau i ngā āhuatanga matū o te uku me ngā āhuatanga taiao. Ko te tautuhinga pai o ngā whatu hangarau e āwhina hoki ki te whai mana hē ki runga i te whakamahi o te uku, nā reira ka whakapai ake ngā hua whakawhiti. Ko te whakatakoto whakataunga mō te tautuhinga me te tirohanga i ngā whatu hangarau he tikanga taurite hei whai hua pai tonu.

Nga Tikanga Whaihua mō te Whakamahi Poraka Uku

Te whiwhi i te huarere pai mō te tāwariwari pūtai hono kei te tīmata i ngā momo hangarau tuhinga pai. Ko te rahi o te tuhinga me te hoahoa o ōna āputa he waahanga nui. Inaianei, e tika ana kia whai tonu ai te rahi o te tuhinga ki te rahi me te āhua o ngā whatu ki runga i te PTK, nā tēnei ka tiakina te whirihora pai o te pūtai hono, me te iti i ngā matakiore me te iti i ngā taumaha. Hei tauira, ko te tuhinga iti e pai ana mo ngā āputa iti hei whakahaere pai i te whakahaere, nā te mea ko tērā e taea ai te whakamana i te wāhi tika, nō reira ko te tuhinga rahi e pai ana mo ngā whatu rahi, nā tērā e taea ai te whakauru i te maha o te pūtai hono.

Kei ngā wāhanga taiao e whakaheke ana te nui o te āhua ki te hīnaki o te pūtahi uhi. Ko te whakamātau i te huatae tika me te werohanga o te wāhi ka whai take mō te iti i ngā momo kēmu i te wā o te tāpiri. Hei tauira, ko te rangahau i whakaatuhia mai nei ko te tino pai ake o te waewae tūmomo hei whakamutu i te uhi o te pūtahi i te wā e kore nei e kitea ai te kino i te whakapapa. Hoki haere, ko te whakamātau i te werohanga tika hei whakamutu i te pūtahi i te mea riro rawekea, e pai ana hoki i te whakarite me te painga o te pūtahi.

Ki te whakamana i ngā hono here me ngā hoko e whai wāhi ana, kāore i whakaae te kaihokohoko ki te tuku iho i te take. Me hangaia e ngā kaiwhakahaere i tētahi rārangi whānui hei tirotiro i ngā tūtohu mō te whakahaere i ngā tūtohu o te taenga o te poraka whakapī. Ko tēnei rārangi ka uiui i te waiporoporo o te pākē, ka whai wāhi i te paunga squeegee e tika ana, ā, ka tirotiro anō i ngā whakatōhua o te rahinga tuhi i runga i ngā pūtake ā-momo. Ka awhina te tirohanga ā-ropu me ngā whakatōhua i runga i ngā hiahia ā-pūnaha e torotoro ana ki te whakatutuki i te whakapī, ko tēnei he mea nui kia kitea ai ngā momo pāharahara matua me te whakangungu i ngā paihikara tuhinga.

Nga Tuhinga Whakamataku Poraka Whakapī

Kei te nui te nohoanga o ngā tūtohu whakamatau pūkeke ki te whakahaere i te ture kawenga i roto i te hanga mea matihiko. Nōti ngā take rerekē, pērā i ngā whakamatau whatiwhatia me ngā tūtohu itinga, ka whakamahi hei whakamana i te mea ko te pūkeke e pai ana ki ngā tauira hoki. Ki te kitea i te whakaatu whatiwhatia, ka taea te tirohia te whakaekehanga o ngā tae me te korenga o ngā huinga motokī, ahakoa kei te whakamatau itinga e mōhio ana ki te whiuwhiu tuwatawata, ka tautohetohea te mea e pai ana te whakarite o te pūkeke mo te whakamahere. Ko te Whakamatau Matihiko Āhua (AOI) ka whakangungua te mahi, ā, ka tautuhia te whakatakoto me te rahi o te pūkeke pūnuitia, kia tika ai te kawe mai o ia paheko, me te mōhio ki te nui o te rauemi.

Te whakatinanatia i ngā mahi tirohanga paihere kōwhiri anō ka taea te iti iho i ngā pūtake hapa i roto i ngā mātai whakapuaki. Ki te hunga toitū o te whenua, e āhei ana ēnei tikanga ki te whēawhea i te painga me te tirotiro o te mahi, ā, ki te iti iho i ngā hapa, pērā i ngā wāhanga e kore nei i te tika me te iti noa iho o te taepa. Hei tauira, ko te tirohanga taumata rite ki te taepa whakapuaki e āhei ana ki te heke i ngā ratonga hapa me ngā utu whakaaturanga, nā reira ka whakapai ake te wehiwhakahaere hanganga me te mana whakamana i ngā tūmomo whakamahere. Ko te taepa whakapuaki inaianei kei roto ia ngā āhuatanga flux hoki, nā, ko te whakarite flux he mea nui mo te whakatū tonu pai.

Kei te whai take nui te tirotiro ā-riunga me te tiaki i ngā tūtohi kawehe mō te whakamana hoki i te haurongo tino pai me te pai o te mahi. Ki te tirotiro i runga i te wā, ka taea e ngā kaiwhakawhiti hanga te whakamutu i ngā momo momo pukapuka me ngā raru i te whakamahi. Ko te tiaki pai e whakaū ana i te roa o ngā pūnaha tuhinga, ā, e manaaki ana hoki i ngā huataki kawehe. Ko tēnei whanonga whakahaere i ngā tūtohi he mea nui rawa kia tiakina ngā paerewa pai huringa ki runga i ngā whakahaere pai. Ka whakaiti tenei pono i te wa ake o te tūtohi, ā, ka whakarite i te horopaki mahi whakatō.

Nga Taunakitanga Poro Kawehe Mōmori Whakariterite

Ka tae ki te whiriwhiria poro kawehe mō ngā tono PCB, ko te Lead-Free Sn99Ag0.3Cu0.7 No.4 Powder Tin Solder Paste ka puta hei whiringa pai. Kei te whai oranga taiao nui tēnei, nā te whakakore i te momo uruika, e tika ana ki ngā paerewa taiao o te ao. Ko tenei hua e whakatūria nei i ngā pai huringa matua, ā, kei te whai mana tonu i ngā whakaaetanga kotahi o mua.

Kiore Tin99Ag0.3Cu0.7 No.4 Pūngao Tītoko Pēke Tin mō Te Whakamahi i te PCB

Ko tēnei pūkeke whakapā he pūtake matatini, e hāngai ana ki ngā ture ā-hereanga. Ko ia hei tohu mōhiotia i te waenganui, me utu pai tonu i ngā whiringa kohikohi, whakamana i te tirotiro i roto i te hanga rorohiko.

Nā ko te Tin Lead Sn63Pb37 Welding Paste kua mau tonu i tana wāhi i roto i ngā mahi whakapā, nā tana hiranga i ngā taupae SMT. Ingoa atu ko tana iti rawa i ngā rama, ko tana take kore-hoki, ko tēnei pūkeke whakapā e pai ana mo ngā wā e hiahia ana ki te iti i te hokiwhiti mōhioherehere, ko tētahi whakaaro tawhito mō ngā kaihangaroto.

Kiore Tin Lead Sn63Pb37 Tītoko Pēke mō SMT Tāruarua Wētahi Residue 6337 Tītoko Pēke

Ko tēnei pūkeke he whiringa whānui mō ngā taupae SMT, nā tana take kore-hoki. Me iti ake te hiahia ki te hokiwhiti nui i roto i te whakapuaki, whakamana i te mataku ki te whai hua.

Ki te whiwhi kaihanga i ngā tūtohu whakamana, ko te mea nui he whakatau i ngā rua tūtohu nei i runga i ngā huringa ā-mahi o te kaupapa. Ko te whanonga kore-ārai he pai mō ngā raeti whakahaere e pā ana ki te taiao, nō reira, ko te whanonga tin-lead he whakaū mō te iti mea o te hokohoko. Nā reira, ko te mōhio i ngā huringa ā-mahi o te kaupapa he kīwai hei whakatū whanonga pai.