Ho na le mefuta e fapaneng ea mekhoa ea tlhahiso ea ho hlahisa akarolo e tloaelehileng ea tšepe. E 'ngoe le e 'ngoe e na le melemo le mathata a eona. Tse ling tsa lintlha tsa bohlokoa tse amang khetho ea ts'ebetso li kenyelletsa tse latelang:
- Bongata ba thepa e hlokahalang
- Moralo oa karolo ea tšepe
- Ho Hlokahala Tolerances
- Tlhaloso ea tšepe
- Qetello ea bokaholimo ea hlokahala
- Litšenyehelo tsa lisebelisoa
- Moruo oa machining khahlano le litšenyehelo tsa ts'ebetso
- Litlhoko tsa thomello
Ho lahla
Ts'ebetso ea ho lahla e na le ho tšela kapa ho kenya tšepe e qhibilihisitsoeng ka har'a hlobo e nang le lekhalo le nang le sebopeho se batlang.li-castings. Mekhoa ea ho lahla tšepe e ka aroloa ka mofuta oa hlobo kapa ka khatello e sebelisoang ho tlatsa hlobo ka tšepe ea metsi. Haeba ka mofuta oa hlobo, mokhoa oa ho lahla o ne o ka aroloa ka ho lahla lehlabathe, ho kenya lichelete le ho lahla tšepe; athe haeba ka khatello e sebelisetsoang ho tlatsa hlobo, mokhoa oa ho lahla o ne o ka aroloa ka ho lahla matla a khoheli, khatello e tlaase le khatello e phahameng ea khatello.
Lintlha tsa motheo tsa Casting
Ho lahla ke mokhoa oa ho tiisa. Ka hona, microstructure e ka hlophisoa hantle, joalo ka sebopeho sa lijo-thollo, liphetoho tsa mekhahlelo le pula. Leha ho le joalo, liphoso tse kang shrinkage porosity, cracks le karohano li boetse li amana haufi-ufi le ho tiisa. Mefokolo ena e ka lebisa ho thepa e tlase ea mochini. Phekolo e latelang ea mocheso hangata e hlokahala ho fokotsa khatello ea maikutlo le ho ntlafatsa thepa ea mochini.
Melemo ea ho Lahlela:
- Lihlahisoa tse kholo le tse rarahaneng tsa ho lahla tšepe li bonolo.
- Sekhahla se phahameng sa tlhahiso, ka ho khetheha ka mohala oa othomathike oa ho bopa.
- Ho feto-fetoha ha moralo ho teng ebile ho loketse haholoanyane.
- Litšepe tse fapaneng li fumaneha: tšepe e bohlooho, tšepe ea ductile, tšepe ea carbon, tšepe ea alloy,ts'epe e sa beng le mabali, motsoako oa aluminium, koporo, koporo le alloy ea zinki.
Mathata a ho Lahlela:
- Litšitiso ka har'a li-castings
- Shrinkage porosity
- Likhakanyo tsa tšepe
- Mapetso, ho taboha ho chesang, ho koala ha serame
- Laps, oxides
- Ho se sebetse hantle, molumo o sa lekaneng
- Kenyelletso
- E hloka taolo e haufi ea ts'ebetso le tlhahlobo (porosity e ka etsahala)
Ho qapa
Forging ke mokhoa oa ho etsa moo tšepe e bōpiloeng ke deformation ea polasetiki tlas'a khatello e kholo likarolong tse matla tse phahameng. Ho ea ka haeba ho sebelisoa hlobo ea ho forging, mokhoa oa ho forging o aroloa ka har'a forging e bulehileng le e koalang die forging. Empa haeba ka mocheso oa tšepe e entsoeng ka tšepe le motsoako pele ho forging, mokhoa oa ho fereka o ka aroloa ka forging e batang, forging e futhumetseng le forging e chesang.
Metheo ea ho Forging
Ho theha kapa ho etsa serame ke mekhoa ea metalforming. Ha ho na ho qhibiliha le ho tiisa ka lebaka leo ho amehang. Deformation ea polasetiki e hlahisa ho eketseha ha palo ea li-dislocation ho fella ka boemo bo phahameng ba khatello ea kelello ea ka hare. Ha e le hantle, ho thatafala ha khatello ho bakoa ke ho sebelisana ha li-dislocation le li-dislocation tse ling le litšitiso tse ling (tse kang meeli ea lijo-thollo). Ka nako e ts'oanang, sebopeho sa likristale tsa mantlha (dendrites) se fetoha kamora ho sebetsa ka polasetiki ea tšepe.
Melemo ea ho Forging:
- Thepa e ntle ea mochini (matla a tlhahiso, ductility, ho tiea)
- Tšepahala (e sebelisetsoang likarolo tsa bohlokoa)
- Ha ho phekolo ea tšepe ea metsi
Melemo ea ho Forging:
- Lefu le sa tlatse
- Ho hloleha ho shoa
- Sebopeho se na le moeli ha ho hlokahala li-undercuts kapa likarolo tsa cored
- Litšenyehelo ka kakaretso hangata li phahame ho feta ho lahlela
- Hangata ho hlokahala mehato e mengata
Re ka khetholla mosebetsi o chesang le o batang. Ho sebetsa ho chesang ho etsoa ka holim'a mocheso oa recrystallization; serame-ho sebetsa e etsoa ka tlaase ho eona. Ho chesa ho sebetsa mathata a thata-thata le sebopeho se sothehileng sa lijo-thollo se felisoa ka potlako haholo ka ho thehoa ha lijo-thollo tse ncha tse se nang mathata ka lebaka la recrystallization. Ho ata ka potlako mochesong o chesang oa ho sebetsa ho thusa ho homogenizing preform. Porosity ea pele e ka boela ea fokotseha haholo, qetellong ea fola ka ho feletseng. Metallurgical liketsahalo tse kang ho thatafatsa le ho recrystallization li bohlokoa hobane liphetoho tsena tsa sebopeho li baka keketseho ea ductility le ho tiea ho feta boemo ba cast.
Ntho ea bohlokoa eo u lokelang ho e hopola ke hore boleng ba thepa le phekolo ea mocheso e ka 'na ea e-ba ntho ea bohlokoa ho feta phapang pakeng tsa ho lahla le ho forging maemong a mang.
Nako ea poso: Feb-24-2021