1. Kupu Whakataki
Hei taahiraa nui i roto i te tukanga SMT, he mea nui te mahi a te whakapiringa reflow ki te whakatau i te pono me te roa o te ora o ngā hua hiko. E ai ki IPC-J-STD-020, e hiahiatia ana te tika o te whakahaere pāmahana o te ±5°C mō te hanga hiko hou. I roto i ngā rāngai pēnei i te hikohiko motuka (AEC-Q100) me te rererangi (MIL-STD-883), ka pā tika te kounga o te whakapiri ki te haumaru me te mahi o te hua.
2. Ngā Mātāpono Tukanga me ngā Pūwāhi Mana Matua
Mā te whakapiringa anō ka hangaia he hononga whakapiri pumau mā roto i ngā kōtaha wera e whakahaeretia ana. Ko ngā tawhā matua ko:
- ·Te tere whakamahana: 1–3°C/s (hei karo i te ru wera)
- ·Te pāmahana tino teitei: 20–40°C i runga ake i te pūwāhi rewa o te tūhono (ko te tikanga he 235–245°C mō te SnAgCu)
- ·Te Wā i Runga ake i te Wai (TAL): 30–90 hēkona
- ·Tere Whakamatao: 1–4°C/s (hei whakapai ake i te hanganga moroiti o te hononga honohono)
3. Ngā Whakatinanatanga Hangarau Matua
3.1 Arotautanga o te Kōtaha Pāmahana
- ·E whakamahi ana i te taputapu tātari wera KIC me te aroturukitanga wā-tūturu 6–12 hongere.
- ·Whakapūmau mata papa ΔT me UTU .
- ·E whakaatu ana ngā rangahau SMTA ka taea e ngā kōtaha wera kua arotauhia te whakaiti i ngā hapa whakapiri mā te 60% (Kura Tuarua, 2021).
3.2 Te Whakahaere Āhuarangi
- ·Te Tiakitanga Hauota: TE2 ka nui ake te makuku mā te 15% mēnā ka kukū te wai Pūrongo Rangahau a Heller).
- ·Te Whakawhitinga Hau Wera: Mā te rere o te hau e whakahaeretia ana (0.5–1.5 m/s) ka ōrite te whakawhiti wera.
3.3 Ngā Inenga Mahi Taputapu
| Waitohu/Tauira | Ngā Rohe Pāmahana | Te Tika o te Mana Pāmahana | Te Whakamahinga Hauota | Ngā Āhuatanga |
|---|---|---|---|---|
| Heller 1910 | 12 | ±1°C | 15m³/h | Hau wera takirua-tohanga |
| Rehm V9 | 10 | ±1.5°C | 12m³/h | Rere whakamuri korehau |
| Jutuo JS-800 | 8 | ±2°C | 18m³/h | Whakamatao atamai |
4. Pūnaha Whakapūmau Kounga
4.1 Te Aroturukitanga Tukanga
- ·Tātaritanga SPC wā-tūturu: CRP ≥ 1.33
- ·Manatoko anō i te kōtaha wera: Ia 4 hāora
- ·Tirotiro hihi-X: Ka whakarite i te kounga o te hononga honohono IPC-A-610 ngā paerewa
4.2 Whakamana Pono
- ·Te Huringa Pāmahana: -40°C ki te 125°C, 1000 huringa
- ·Te wiri ā-ringa: 20–2000Hz, whakamātautau tuaka-3
- ·Te Whakarewatanga Metallography: Matotoru IMC (pūhui whakawhiti-whakarewa) 2–5μm
5. Ngā Take Tono Ahumahi
- ·Ngā Hikohiko Aunoa: E tutuki ana i ngā paerewa ahotea wera 3000-huringa.
- ·Ngā Pūrere Hauora: Kua whai tiwhikete i raro i te ISO 13485 mō te whai i ngā tukanga me te pono.
- ·Whakawhitiwhiti Kōrero 5G: Ka whakarite i te pono o te tohu me te āhua hononga honohono kua arotauhia mō ngā kōwae mmWave.
6. Whakarāpopototanga: Ngā Pūtake o te Whakapiripiri Reflow Tino Pono
- ·Te whakahaere tika i te kōtaha wera
- ·Te mahi a ngā taputapu pumau me te whai hua
- ·Te aroturukitanga kounga tukanga-katoa me te whakamana pono
Mā te whakahaere tukanga pūnaha, ka taea e ngā kaihanga te whakatutuki i te hua whakapiringa reflow ≥99.9%, ka eke ki ngā taumata kounga me te ōritetanga matua o te ahumahi.
Ngā Tohutoro
- 1.IPC-J-STD-020E, 2020
- 2. Heller Process Solutions White Pepa, 2022
- 3. Ngā Whakataunga ā-Ao o te SMTA, 2021
- 4.MIL-STD-883H, 2019
- 5.AEC-Q100 Rev-H, 2014
