Ha ho etsoa likoloi tsa sejoale-joale, welding ha e sa le mokhoa o bonolo oa ho kopanya tšepe. Ho e-na le hoo, e fetohile tšebetso e nepahetseng{1}e laoloang e hlokang tsamaiso e hokahaneng eanako, matla le nakoka har'a milliseconds. Ha meralo ea likoloi e ntse e tsoela pele ho etelletsa pele meaho e bobebe, ho kenngoe motlakase, le litekanyetso tse phahameng tsa ts'ireletso, mahlale a setso a ho tjheseletsa butle-butle a fihla meeling ea ona ho latela ts'ebetso le ts'ebetso. Medium Frequency Direct Current (MFDC) spot welding ka hona e fetohile tharollo e ratoang libakeng tse ngata tsa tlhahiso ea likoloi.
Ha ho bapisoa le lits'ebetso tse tloaelehileng tsa welding tsa AC, li-welders tsa MFDC hangata li sebetsa ka maqhubu a inverter ea hoo e ka bang.1000 Hz, e nolofalletsang karabelo e potlakileng ho mefuta e fapaneng ea thepa le phepelo e tsitsitseng haholoanyane nakong ea lipotoloho tse khuts'oane tsa welding. Litšobotsi tsena ha li ntlafatse boleng ba weld feela empa hape li kenya letsoho ka kotloloho koloing ka kakaretsoTs'ebetso ea NVH (Lerata, Vibration le Harshness)mmoho le ho thula.
Sengoliloeng sena se hlahloba lits'ebetso tse tharo tsa bohlokoa tsa ho etsa likoloi{0}}'Mele-ka har'a-Mehaho e tšoeu, lisebelisoa tsa betri, le likarolo tsa polokeho ea chassis-mme e hlalosa kamoo tekhenoloji ya MFDC welding e rarollang diphephetso tse amanang le tsona. E boetse e fana ka tataiso e sebetsang ea khetho ea lisebelisoa ho ts'ehetsa baenjiniere le lihlopha tsa ho reka thepa ho etsa liqeto tse nang le tsebo mabapi le matsete.
'Mele-ka har'a-White Welding: Mathata a Hlahisoa ke High{2}}Matla a Tšepe le{3}}Mehaho e Mengata
'Mele-ka har'a-Libopeho tse tšoeu (BIW) li theha moralo oa mantlha oa koloi, 'me boleng ba li-weld joints bo ama ka kotloloho ho tiea ha sebopeho,{2}}ho tšoarella ha nako e telele, le ts'ebetso ea ho soahlamana. Lilemong tsa morao tjena, baetsi ba likoloi ba eketsehile ka ho eketsehilengtobetsa{{0}hardened steel (PHS)le -likopano tse ngata-ngata molemong oa ho fihlela kaho e bobebe le matla a holimo. Le ha lisebelisoa tsena li fana ka melemo e mengata ea ts'ebetso, li boetse li beha litlhoko tse kholo ho lisebelisoa tsa welding.
Mathata a Tloaelehileng a Tekheniki ho Hodimo-Matla a Tshepe ya Welding
-litšepe tse matla ha li thata ka tlhaho ho li cheseletsa, empa li hloka taolo e tsitsitseng haholo. Haeba lisebelisoa tsa welding li sa khone ho arabela ka potlako liphetohong tsa ho hanyetsa motlakase, hangata ho thata ho boloka weld consistency.
E 'ngoe ea liqholotso tse tloaelehileng haholo e hlaha hoAl-Lisebelisoa tse koahetsoeng ka Si. Boholo ba 1500 MPa-mehato ea likhatiso-litšepe tse thata li tlositsoe ka aluminiamo{4}}silicon layer, e bonts'ang khanyetso e sa tsitsang nakong ea mokhahlelo oa pele oa ho tjheseletsa. Ntle le taolo e tsitsitseng ea hona joale, boemo bona bo ka lebisa ho spatter e feteletseng, ho thehoa ha nugget e sa tsitsang, le ho roala ha electrode ka potlako. Litaba tsena ha li ame feela boleng ba weld empa hape li eketsa litlhoko tsa tlhokomelo le nako ea tlhahiso.
Taba e 'ngoe khafetsa e etsahala kamefuta-likopano tsa maqephe a mangata, haholoholo libakeng tsa meralo joalo ka B-litšiea le litho tsa longitudinal. Litlhophiso tse kang "maqephe a mabeli a masesaane le lakane e le 'ngoe e teteaneng" kapa "maqephe a mararo a botenya bo lekanang" a sebelisoa hangata. Litokisetsong tsena, motlakase o atisa ho latela tsela ea ho hanyetsa ho fokolang, e ka thibelang ho hlahisa mocheso o lekaneng ka mekhahlelo e meholo e bohareng. Ka lebaka leo, fusion e sa fellang kapa ho kenella ha nugget e sa lekaneng ho ka etsahala.
Le hoja li-welds tsa motho ka mong li ka 'na tsa bonahala li amoheleha qalong, ho se lumellane ho joalo ho patehileng ho ka fokolisa ts'ebetso ea sebopeho tlas'a maemo a ho senya.
Litharollo tsa Bohlokoa tsa MFDC bakeng sa Likopo tsa BIW
Ho rarolla liqholotso tsena, MFDC welding systems e sebelisa maano a ntlafetseng a taolo, kataolo ea maikutlo e potlakilengho ba e 'ngoe ea matla a bohlokoahali.
Balaoli ba sejoale-joale ba MFDC hangata ba etsa mohlala oa maikutlo a hajoale ka linako tsa millisecond. Ha liphetoho tsa tšohanyetso tsa ho hanyetsa li fumanoa, tsamaiso e fetola litekanyetso tsa tlhahiso hoo e batlang e le hang-hang, ho boloka mocheso o tsitsitseng oa mocheso ho pholletsa le potoloho ea weld. Bokhoni bona ke ba bohlokoa ka ho khetheha ha u sebetsa ka lisebelisoa tse koahetsoeng, kaha sethala sa ho senya liphahlo hangata ke karolo e sa tsitsang ea ts'ebetso.
Ntle le taolo ea nako ea sebele-,liprofaele{{0}tse ngata tsa pulse weldingli sebelisoa haholo tlhahiso ea BIW ho ntlafatsa botsitso ba ts'ebetso le ho fokotsa khatello ea maikutlo ea kahare.
Mokhoa o tloahelehileng-oa mekhahlelo e mengata e kenyelletsang:
| Sethala | Mosebetsi | Sepheo sa mantlha |
|---|---|---|
| Preheating Stage | Kenyo e tlase ea hajoale | E nolofatsa ho roala le ho tsitsisa ho kopana ha motlakase |
| Mothati o ka Sehloohong oa Welding | Tlhahiso e phahameng ea hona joale | E theha nugget ea weld |
| Mothati oa ho futhumatsa | Phokotso ea matla a hona joale | E ntlafatsa ductility le ho fokotsa brittleness |
Lits'ebetsong tse sebetsang, mokhoa ona o fokotsa haholo spatter mme o lelefatsa bophelo ba ts'ebeletso ea li-electrode, hangata e fihlellamakhetlo a mararo ho isa ho a mahlano nako e telele ea bophelo ba electrodeha e bapisoa le litsamaiso tse tloaelehileng tsa welding tsa AC.
Betri System Welding: Ho Kopana le Litlhoko tsa Aluminium le Lisebelisoa tse sa Tšoaneng
Ka kholo e potlakileng ea likoloi tsa motlakase, litsamaiso tsa betri li fetohile e 'ngoe ea likopano tsa bohlokoa ka ho fetisisa moralong oa likoloi tsa sejoale-joale. Likarolo tse kang literei tsa betri, liforeimi tsa tšehetso, le likhokahanyo tse tsamaisang motlakase li hloka litšepe tse tšepahalang haholo ho netefatsa{1}}bots'epehi ba nako e telele le ts'ebetso ea motlakase.
Sebakeng sena, ho cheselletsa libaka tsa MFDC ho fana ka ntlafatso ea ts'ebetso le melemo e mengata ea ts'epo.
Hobaneng ha Aluminium Welding e Hlokahala Haholoanyane
Lisebelisoa tsa aluminium li sebelisoa haholo meahong ea betri ea koloi ea motlakase, empa litšoaneleho tsa tsona tsa welding li fapane haholo le tsa tšepe.
Ntho e 'ngoe e kholo ke conductivity ea mocheso. Aluminium e tsamaisa mocheso ka potlako e ka bang makhetlo a mararo ho feta tšepe, ho bolelang hore mocheso o qhalana ka potlako linthong tse potolohileng. Haeba tlhahiso ea matla e sa fanoe ka potlako e lekaneng, ho ba thata ho hlahisa nugget e tsitsitseng ea weld. Ho feta moo, libaka tsa aluminium hangata li koahetsoe ke lera le teteaneng la oxide, leo mocheso oa lona o qhibilihang o leng holimo haholo ho feta oa tšepe ea motheo. Ntle le haeba lera lena la oxide le sitisoa hantle, botšepehi ba weld bo ka senyeha.
Ka lebaka la mabaka ana, ho cheselletsa aluminium ho hloka ka bobelibokgoni ba jwale bo phahamengletaolo e nepahetseng ya matla.
Boleng ba Sephetho se Phahameng sa Hona Joale ka Lipotoloho tse Khutšoane tsa Weld
O mong oa melemo ea bohlokoa ka ho fetisisa ea li-welders tsa MFDC lits'ebetsong tsa aluminium ke bokhoni ba bona ba ho fana ka maemo a tsitsitseng, a phahameng a hona joale nakong ea nako e khuts'oane ea welding. Sena se lumella mocheso hore o tsepamiselitsoe ho sehokelo sa weld ho e-na le ho qhalana ho pholletsa le thepa e potolohileng.
Tlas'a maemo a tloaelehileng a tlhahiso, aluminium welding cycles hangata e phethoa ka hareka tlase ho 100 milliseconds, ka maemo a hajoale a fihlang30 kA ho isa ho 50 kA. Phepelo ena e potlakileng ea matla e ts'ehetsa ho tloaeleha ha li-nugget ha e ntse e fokotsa mocheso-khōlo e amehang ea libaka le ho fokotsa kotsi ea ho sotha karolo e itseng.
Bakeng sa meaho e meholo e joalo ka literei tsa betri, bokhoni bona hangata bo fetolela ka kotloloho tlhahiso e ntlafalitsoeng ea tlhahiso le litheko tse fokotsehileng tsa lisebelisoa.
Taolo ea Ts'ebetso ho Ts'ebeliso e sa Tšoaneng ea Metal
Ho likarolo tsa betri, ho tloaelehile ho kopanya lisebelisoa tse kang aluminium-ho{1}}koporo kapa aluminium-ho{3}}tšepe. Metsoako ena ea tšepe e sa tšoaneng e hloka taolo e hlokolosi ho thibela ho thehoa ha ho feteletsenglikarolo tsa intermetallic compound (IMC)., e ka fokolisang thepa ea mochine ea weld.
Ka ho lokisa polarity le kabo ea mocheso, litsamaiso tsa MFDC li lumella taolo e nepahetseng haholoanyane ea kholo ea intermetallic, e thusa ho boloka matla a kopanelo le ho ts'epahala ha nako e telele-.
Lintlha tsa tlhahiso ho tsoa lits'ebetsong tse ntlafalitsoeng tsa welding hangata li bonts'a phapang e fokolang haholo ea matla a weld, e leng se tlatselletsang ntlafatsong ea kakaretso ea sehlahisoa.
Likarolo tsa Chassis le Tšireletseho: Litlhoko tsa Botsitso le Traceability
Joalo ka meaho ea BIW, likarolo tsa chassis li tlameha ho fihlela litekanyetso tse thata tsa ts'ebetso. Likarolo tsena hangata li na le maemo a matla a ho palamisa, 'me botšepehi ba weld bo bohlokoa bakeng sa ho boloka polokeho ea koloi.
Mehlala e tloahelehileng e kenyelletsa liforeimi tse nyane, liphaka tsa taolo, le liankora tsa mabanta a setulo, tseo kaofela li khetholloang e le likarolo tsa bohlokoa tsa polokeho-.
Phano ea Matla a Tsitsitseng ho Thick Material Welding
Likarolo tsa chassis hangata li sebelisa lishiti tsa tšepe tse nang le botenya ho tloha hoho tloha ho 3 ho isa ho 6 mm. Libakeng tsa 'nete tsa tlhahiso, bokaholimo bo ka ba le lira, oxidation e nyane, kapa likheo tsa kopano, tseo kaofela li ka susumetsang khanyetso ea likhokahano.
Haeba lits'ebetso tsa welding li sitoa ho lefella mefuta ena e fapaneng, mefokolo e kang ho kenella ho sa lekaneng kapa li-welds tse batang li ka hlaha. Ho rarolla bothata bona, hangata lisebelisoa tse tsoetseng pele li kenyelletsamekhoa ea kamehla ea ho laola matla, e leng eona e fetolang tlhahiso ea motlakase ho boloka mocheso o tsitsitseng.
Mokhoa ona o netefatsa boleng bo tsitsitseng ba weld le ha maemo a workpiece a fetoha, a fokotsa haholo ho fetoha ha ts'ebetso.
Bohlokoa bo Holang ba Taolo ea Boitsebiso ba Weld
Tlhahisong ea sejoale-joale ea likoloi, boleng ba weld ha boa lokela ho ts'oana feela empa hape bo ka lateloa ka botlalo. Ka mokhoa o ntseng o eketseha, lits'ebetso tsa welding li kopantsoe le tikoloho ea tlhahiso ea dijithale e tlalehang lintlha tse qaqileng tsa ts'ebetso bakeng sa weld ka 'ngoe.
Li-parameter tse tloaelehileng tse rekotiloeng li kenyelletsa:
| Mofuta oa data | Morero |
|---|---|
| Hona joale Waveform | E netefatsa ho tsitsa ha matla |
| Qobella Curve | E beha leihlo boitšoaro ba khatello ea electrode |
| Lintlha tsa Phallo | E latela matla a ho theha nugget |
| Nako ea Weld | E laola nako ea potoloho ea tlhahiso |
Ha nako e ntse e ea, lintlha tsena li thusa bahlahisi ho tseba mekhoa, ho lemoha mefokolo e ka bang teng esale pele, le ho hlophisa tlhokomelo ka hloko, 'me qetellong ba fokotsa nako e sa reroang.
Mokhoa oa ho khetha MFDC Spot Welder e nepahetseng bakeng sa Likopo tsa Likoloi
Ha u reka lisebelisoa tsa ho cheselletsa litšepe, ho tsepamisa maikutlo ho theko ke ka seoelo ho tlisang liphetho tsa nako e telele-. Leano le sebetsang haholoanyane le kenyelletsa ho lekola lintlha tsa bohlokoa tsa tekheniki tse susumetsang ts'ebetso le ts'epo ka kotloloho.
Lintlha tse latelang ke tse ling tsa lintlha tsa bohlokoa ka ho fetisisa tse lokelang ho nahanoa nakong ea khetho ea lisebelisoa.
Lethathamo la Referense la Lintlha tsa Tekheniki
| Paramethara | Tlhaloso | Recommended Range |
|---|---|---|
| Inverter Frequency | E khetha ho nepahala ha taolo ea hajoale | ~ 1000 Hz bakeng sa meaho ea likoloi |
| Peak Hajoale Bokhoni | E susumetsa bokhoni ba ho theha nugget | Tlhahiso e phahameng e hlokahalang bakeng sa aluminium |
| Phetoho ea Transformer | E ama tšebeliso ea matla le ho tšepahala | Re khothaletsoa{{0}lisebelisoa tsa mantlha tse sebetsang hantle |
| Bokhoni ba ho Laola Sisteme | E khetha ho feto-fetoha ha maemo | Ho khothaletsoa{{0}mekhoa e mengata ea maikutlo le matla |
| Sehokelo sa Automation | E hlalosa ho lumellana ha tsamaiso | Tšehetso bakeng sa Profinet kapa EtherCAT e ratoang |
Litekanyetso tsena hangata li thathamisitsoe litokomaneng tsa tekheniki 'me li ka bapisoa ho bafani ba thepa nakong ea tlhahlobo.
Litlhahiso tsa Thepa ka Boemo ba Kopo
Likarolo tse fapaneng tsa koloi li hloka litšobotsi tse fapaneng tsa welding. Ho khetha lisebelisoa ho latela ts'ebeliso-litlhoko tse khethehileng ho thusa ho netefatsa tlhahiso le ts'epahalo ea nako e telele-.
| Kopo | Litšobotsi tse khothalelitsoeng | Tsepamiso ea Pele |
|---|---|---|
| BIW Welding | Taolo-e mengata ea hajoale | Ho tsitsisa weld |
| Welding ea Battery System | Bokhoni bo phahameng ba hajoale | Tekano e kopaneng le ho tiisa |
| Likarolo tsa Tšireletso ea Chassis | Taolo ea kamehla ea matla | Ho tsitsa le ho tšepahala |
Ho sebelisa sesebelisoa-leano la khetho e khannoang hangata ho nolofatsa liqeto-mokhoa oa ho etsa le ho fokotsa menyetla ea lisebelisoa tse sa tsamaisaneng.
Qetello
Ha tlhahiso ea likoloi e ntse e tsoela pele ho fetoha, karolo ea lisebelisoa tsa ho tjheseletsa e ntse e fetoha ka nepo. Seo pele se neng se nkoa e le sesebelisoa sa tlhahiso e ikemetseng joale e se e le karolo ea bohlokoa ea tsamaiso ea tlhahiso e kopantsoeng ka botlalo. Ts'ebetso ea lisebelisoa tsa ho tjheseletsa ha e ame feela boleng ba weld empa hape le katleho ea tlhahiso, litšenyehelo tsa ts'ebetso, le ho ts'epahala ha sehlahisoa sa nako e telele-.
Ho tloha ho 'Mele-ka-Mehaho e tšoeu ho isa ho tse kopanyang betri ea koloi ea motlakase le likarolo tsa polokeho ea chassis,Theknoloji ea welding ea MFDCka potlako e fetoha tharollo e tloaelehileng ho pholletsa le mekhahlelo e mengata ea tlhahiso ea likoloi. Bakeng sa lik'hamphani tse rerang lintlafatso tsa lisebelisoa kapa mela e mecha ea tlhahiso, ho utloisisa litlhoko tse khethehileng tsa ts'ebetso ea kopo e 'ngoe le e' ngoe le ho lekola ka hloko likarolo tsa bohlokoa tsa tekheniki ho ka fokotsa haholo likotsi tsa ts'ebetso.
Ha u reka liqeto li fetela ka nģ'ane ho ho nahanoa ka litšenyehelo tsa pele 'me u qale ho li etelletsa pelebotsitso, tšebelisano, le ho ts'epahala ha nako e telele-, ho khetha tharollo e nepahetseng ea MFDC welding e fetoha letsete le fanang ka boleng bo tsitsitseng ba ts'ebetso.
