MFDC Spot Welding ka baarakɛcogo ɲuman ka ɲɛsin nɛgɛso busbarw ma

Kuran Mobili kura, fanga marayɔrɔw, ani fanga tilatilali min bɛ wuli joona, n’o ye kuran bisiw jɛgɛncogo ɲuman ye, o ye kuran sɛnɛcogo bɛɛ ka ɲɛnamaya sira ye. I n’a fɔ izini ɲininiw bɛ wuli ka bɔ « jɛɲɔgɔnya kɛli » dɔrɔn na ka taa « ɲɛnamaya jan, bɔnɛ dɔgɔyali, ani nafa zeru » sabatili la, o ye Medium Frequency Direct Current Inverter yeSpot Welder (Spot Welder) yebɔra kɛnɛ kan i n'a fɔ izini-furakɛcogo sariyalen. Nka, walasa k’a seko kɛ tiɲɛ na, faamuyali jugu min bɛ a kɔnɔ, o nafa ka bon kosɛbɛ fɛnɲɛnɛmako ni taabolo kɔlɔsili la.

Nin gafe in bɛ MFDC fɛɛrɛbɔcogo jugumanba dɔ di kuran busbar welding na, min bɛ funteni fizikikow ɲɛfɔ, baarakɛcogo dafalenw paramɛtiriw, fɛnw farali ɲɔgɔn kan minnu tɛ kelen ye, ani yɔrɔ la gɛlɛyaw ɲɛnabɔli.

Kupu bɛ gɛlɛya kɛrɛnkɛrɛnnen dɔ lase rezisti welding ma k’a sababu kɛ a ka funteni-taamacogo ka bon kosɛbɛ (a bɛ se $400 W/(m\\cdot K)$) ani a ka kuran-taamacogo ma. O kɔrɔ ye ko funteni min bɛ sɔrɔ solda waati la, o bɛ teliya ka taa lamini fɛnw ni elekitorodew la, o b’a to a ka gɛlɛn ka welda nugget sabatilen dɔ dilan.

Joule ka sariya fɛ, $Q=I^2Rt$, funteni sɔrɔli bɛ tali kɛ kosɛbɛ baarakɛminɛnw ni ɲɔgɔn cɛ ɲɔgɔnkanu rezisti la, bawo nɛgɛ ka fɛnɲɛnamafagalan camanba ($R$) ka dɔgɔ kosɛbɛ.

Laadalata AC welders (50/60Hz) bɛ tɔɔrɔ sɔrɔ sisan jiginniw fɛ ani zeru-tɛmɛsiraw fɛ, minnu bɛ funteni tigɛ waati dɔɔnin kɔnɔ. Ni nɛgɛ ye min bɛ taa ni a ye kosɛbɛ, o lafiɲɛbɔ surun in bɛ a to funteni ka bɔ, a ka c’a la, o bɛ na ni surface flash ye nka a bɛ kɛ ni weld nugget dafalen ye walima "nɛnɛ" ye (a bɛ fɔ a ma ko "shunted weld").

MFDC welder bɛ se sɔrɔ o kan ni a bɛ kurunba wuli ka taa frequency (a ka c’a la 1000Hz) la ani ka DC ripple dafalen-free waveform kɛrɛfɛ{1}}dafalen dɔ bɔ. O fanga doncogo sabatilen, min bɛ to senna, o bɛ a to:

• Funteni balansi yɔrɔnin kelen : Fɛrɛnkanba bɛ sira Di milisekɔndi-dakun kɔlɔsili ma, ka funteni bɛrɛ Bɔ walasa ka nugu Kɛ sani funteni jɛnsɛnni ka Se ka fanga tiɲɛ.
• Nugget Formation consistent : DC current nɔgɔlen bɛ jidagayɔrɔ wulilen funteni mara, ka gɛnni (sɔgɔli) dɔgɔya ani ka a to welda kelen, juguman ka kɛ.
• Minimised Heat Affected Zone (HAZ): Fanga bɛ sɔrɔ kosɛbɛ welda yɔrɔ la, o min nafa ka bon kosɛbɛ NEV batiriw la, yɔrɔ minnu na funteni kojugu bɛ se ka selilu kɛrɛfɛtaw walima insulasi tiɲɛ.

Ka se ka nɛgɛ busbar weld ɲuman-ɲumanba sɔrɔ, o tɛ dan sisan sigili dɔrɔn ma; a bɛ tali kɛ taabolo sigilen na, min bɛ taabolo caman -.

1. Sani-Weld Surface Preparation: O ye fɛɛrɛ fɔlɔ kɔrɔlen ye

Kupu yɔrɔw bɛ teliya ka kɛ ɔkisizɛni ye min bɛ se ka wuli kosɛbɛ. Ni aw ye solda kɛ o layini in kan, o bɛ na ni funteni sɔrɔli basigibali ye ani ka sɔgɔsɔgɔ kojugu.

• Masina saniya : Aw bɛ nɛgɛ burusi walima abrasifu finman kɛ ka ɔkisizɛni sɔgɔlen bɔ, ka laɲini kɛ ka a sanfɛla gɛlɛya ($Ra$) min bɛ se $1.6\\mu m$ ɲɔgɔn ma.
• Tumu bɔli kemikɛli fɛ: Aw bɛ soja yɔrɔ saniya ni izini dɔlɔ walima asetɔni ye walasa ka tuluw ni nɔgɔw bɔ minnu bɛ se ka gazi bɔ ani ka kɛ sababu ye ka sɔgɔsɔgɔninjɛ kɛ.

2. Paramɛtiriw sigicogo ladilikanw (Misali: 3mm+3mm Kupu saniyalen) .

Sariyabaju min bɛ nɛgɛso sɔgɔli la, o ye "Kuranba, Waati surun, Fangaba."

3. Elektɔriw ɲɛnabɔli

• Fɛn minnu bɛ kɛ: Kalasi 2 (CuCrZr) walima Kalasi 3 (CuBe2) ye sariya ye. Busbara minnu ka bon kosɛbɛ, nɛgɛ minnu tɛ se ka wuli i n’a fɔ Tungsten walima Molybdénum, ​​olu bɛ kɛ tuma dɔw la walasa ka dɔ fara ɲɔgɔnkanu kunbɛnni kan ani ka funteni sinsin.
• Jateminɛ : Radius tip belebele (misali la, R50-R100 dome walima flat-face truncated cone) de ka fisa walasa ka sisan density ɲɛnabɔ ani ka indentation dɔgɔya.

MFDC solderw ka fisa ni ɲɔgɔndanko gɛlɛnw ye minnu bɛ sɔrɔ NEV batiri dilanni na:

• Kupu + Aluminiyɔmu:O ye gɛlɛyaba ye k’a sababu kɛ fɛnɲɛnamafagalanw (IMC) minnu bɛ sɔgɔsɔgɔ, olu sɔrɔli teliya la. MFDC ka kɔrɔsili tigitigi bɛ sira Di welda kɔrɔsilen dɔ ma min bɛ IMC layɛrɛ janya dan Kɛ mikromɛtɛrɛ damadɔ ye, o bɛ masin fanga ni kuran baarakɛcogo bɛɛ Lakana.
• Kupu + Nikilɛri/Acier inoxydable:Ikomi Niki ni Nɛgɛ Inox ka se ka wuli kosɛbɛ ka tɛmɛ nɛgɛ kan, funteni balansi bɛ wuli a yɛrɛ la ka taa fɛn min na min ka gɛlɛn -. O fura in bɛ tali kɛ Elektrode danfaralenw na: elekitorode min bɛ se ka - kosɛbɛ (misali la, Molibdɛni) nɛgɛ fan fɛ ani CuCrZr elekitorode standard nikɛri fan fɛ walasa ka funteni bɔli kɛ kelen ye cogo dilannen na.

Welda jogo ka kan ka sɛgɛsɛgɛ ni sɛgɛsɛgɛli fɛɛrɛw ye minnu bɛ tiɲɛni kɛ ani minnu tɛ -tiɲɛni tɛ, tuma caman na, u bɛ tali kɛ sariya gɛlɛnw na i n’a fɔ IPC-A-610 (Acceptability of Electronic Assemblies) ani sariya kɛrɛnkɛrɛnnenw minnu ɲɛsinnen bɛ mobili ma i n’a fɔ QC/T 413.

Hali ni minɛn ɲumanw bɛ yen, taabolo caman bɛ se ka kɛ sababu ye ka fiɲɛw lase mɔgɔ ma. Tabali nafama dɔ filɛ nin ye foro injiniyɛriw ye:

Kuncɛli

A ka baarakɛcogo ɲumanMFDC ka yɔrɔw souduresabu nɛgɛ bisiw tɛ danyɔrɔ dɔrɔn ye; a bɛ fɛn dilanni seko caman wulicogo jɔnjɔn jira. A bɛ gɛlɛya danmadɔw ɲɛnabɔ nɛgɛ ka fɛnɲɛnamafagalanw tali la, ka welda ɲuman di ni dannayaba ye (a ka c’a la, 99,9%+ sɔrɔ), fanga dɔgɔyaliba (a bɛ se ka dɔgɔya fo 30% ni i y’a suma ni AC ye), ani ka taabolo dafalenw nɔfɛtaama.

NEV ni kuran baarakɛlaw ka ɛntɛrinɛti injiniyɛriw fɛ, MFDC fɛɛrɛ tali tɛ ŋaniyata ye tugun-a ye wajibi ye walasa ka se ka ɲɔgɔndanw sɔrɔ minnu ka bon, minnu bɛ se ka da u kan, minnu bɛ se ka da u kan, bi sigidaw bɛ minnu ɲini.

Aw ye ɲɔgɔn sɔrɔ sisan