Sephahla sa ho lahlae kenngoa ka har'a valve, sekhahla sa khatello ea valve ea ho lahla ka kakaretso se batla se le tlaase (joaloka PN16, PN25, PN40, empa ho boetse ho na le khatello e phahameng, e ka ba ho 1500LD, 2500LB), boholo ba caliber e feta DN50.Li-valve tsa ho thehali entsoe.Hangata li sebelisoa liphaepheng tsa maemo a holimo.Caliber e nyane, 'me hangata e ka tlase ho DN50.
A, ho lahlela
1. Ho lahla: ke mokhoa oa ho qhibilihisa tšepe ka har'a mokelikeli o finyellang litlhoko tse itseng ebe o o tšela ka har'a hlobo ea ho lahla.Kamora ho pholile le ho tiisa, ho lahla (likarolo kapa tse se nang letho) ho fumanoa ka sebopeho se reriloeng esale pele, boholo le ts'ebetso.Theknoloji ea mantlha ea indasteri ea ho etsa mechini ea sejoale-joale.
2, tlhahiso ea ho lahla ea litšenyehelo tse se nang letho e tlaase, bakeng sa sebōpeho se rarahaneng, haholo-holo ka likarolo tse rarahaneng tsa cavity, ho feta ho ka bontša moruo oa eona;Ka nako e ts'oanang, e na le mekhoa e mengata ea ho ikamahanya le maemo le lisebelisoa tse ntle tsa mochine.
3, empa lisebelisoa tse hlokahalang bakeng sa tlhahiso ea ho lahla (joalo ka tšepe, lehong, mafura, lisebelisoa tsa ho bōpa, joalo-joalo) le lisebelisoa (tse kang sebōpi sa metallurgical, mochini o kopanyang lehlabathe, mochini o bōpang, mochine o etsang li-core-making, shaker, mochine o thunyang, cast iron plate, joalo-joalo) li ngata, 'me li tla hlahisa lerole, khase e kotsi le lerata le ho silafatsa tikoloho.
4. Casting ke mofuta oa theknoloji ea tšepe e chesang e sebetsang e nang le histori ea lilemo tse ka bang 6000.Ka 3200 BC, lihohoana tsa boronse li ile tsa hlaha Mesopotamia.Pakeng tsa 13 BC le 10 BC lekholong la lilemo la BC, China e kene mehleng ea boholo-holo ea lipapali tsa boronse, ts'ebetso e fihlile boemong bo phahameng haholo, joalo ka Shang Dynasty Simuwu square Ding ea boima ba 875 kg, Warring States Dynasty Jinghou Yi Zunpan le Western Han Dynasty. seipone se pepeneneng ke lihlahisoa tse emetseng tsa ho lahla boholo-holo.Ho bōptjoa ha pele ho ne ho susumetsoa haholo ke lipitsa tsa letsopa, 'me boholo ba lijana e ne e le lisebelisoa kapa lisebelisoa tsa tlhahiso ea temo, bolumeli, bophelo le likarolo tse ling, tse nang le mebala e matla ea bonono.Ka 513 BC, Chaena e ile ea hlahisa tšepe ea pele ea tšepe litlalehong tse ngotsoeng lefatšeng - Jin Casting Ding (hoo e ka bang 270 kg).Hoo e ka bang lekholong la bo8 la lilemo, Europe e ile ea qala ho hlahisa tšepe e entsoeng ka tšepe.Kamora phetohelo ea indasteri lekholong la bo18 la lilemo, li-castings li kene nakong e ncha ea ho sebeletsa liindasteri tse kholo.Lekholong la bo20 la lilemo, tsoelo-pele e potlakileng ea ho lahla, e ntlafalitse tšepe ea ductile, tšepe e ka tšeptjoang, tšepe e sa hloekang ea ultra-low le koporo ea aluminium, silicon ea aluminium, alloy aluminium alloy, titanium base, nickel base alloy le lisebelisoa tse ling tsa tšepe. 'me a qapa mokhoa o mocha oa tšepe ea bohlooho ho etsa phekolo.Kamora dilemo tsa bo 1950, dithekenoloji tse ntjha tse kang ho bopa lehlabathe le metsi kgatello e phahameng, ho bopeha ha lehlabathe le thatafatsang dikhemikhale, ho etsa dikonokono, ho bopa ha kgatello e mpe, le tse ding tse ikgethang tsa ho lahla le ho qhomisa dithunya.
5. Ho na le mefuta e mengata ea ho lahla.Ho ea ka mokhoa oa ho etsa mohlala, ho tloaelehile ho aroloa ka 0 tloaelehileng lehlabathe la ho lahla, ho akarelletsa le lehlabathe le metsi mofuta, omileng mofuta oa lehlabathe le lik'hemik'hale thatafatsa lehlabathe mofuta 3. (2) lahla khethehileng, tobetsa ho bōpa thepa le ka aroloa ka tlhaho lehlabathe la diminerale e le lisebelisoa tse ka sehloohong tse khethehileng tsa ho lahla (mohlala, ho etsa matsete, ho lahla hlobo, mochini oa khetla oa ho lahla, ho lahla khatello e mpe, ho lahla hlobo, ho lahla hlobo ea ceramic, joalo-joalo) le tšepe e le thepa e ka sehloohong ea hlobo e khethehileng (e kang ho lahla hlobo ea tšepe, ho lahlela khatello, ho lahla ho tsoelang pele, ho fokotsa khatello e tlaase, ho lahla centrifugal, joalo-joalo).
6, ts'ebetso ea ho lahla hangata e kenyelletsa: (ho lahlela (lits'oants'o) ho etsa hore tšepe ea metsi e be e tiileng, ho lahla ho ea ka lisebelisoa ho ka aroloa ka hlobo ea lehlabathe, tšepe, ceramic, seretse, graphite, joalo-joalo, e ka aroloa ka tšebeliso e lahloang, halofo e sa feleng. le mofuta oa ka ho sa feleng, boleng ba ho lokisa hlobo ke lintlha tse ka sehloohong tse susumetsang boleng ba ho lahla; Ho qhibiliha le ho tšolloa ha tšepe ea tšepe, tšepe ea ho lahla (casting alloy) haholo-holo e kenyelletsa tšepe e entsoeng ka tšepe, tšepe e entsoeng ka tšepe le alloy e se nang ferrous; (3) tlhahlobo, kalafo ea ho lahlela, ho kenyeletsoa ho tlosoa ha 'mele le ho lahlela holim'a 'mele oa linaha tse ling, ho tlosoa ha riser, burr ea ho sila ka likharafu le tse ling, phekolo ea mocheso, sebōpeho, phekolo ea antirust le ho sebetsa ka thata.
Thepa ea bobeli
1, forging: ke ts'ebeliso ea mochini oa forging holim'a khatello ea tšepe ea billet, deformation ea polasetiki ho fumana thepa e itseng ea mochini, sebopeho se itseng le boholo ba mokhoa oa ho sebetsa oa forgings.
2, e 'ngoe ea likarolo tse peli tsa mantlha tsa ho qhekella.Ka forging ka felisa tšepe e le lahleloa hlephileng, masoba tjheseletsa, thepa ea mechine ea forgings ka kakaretso molemo ho feta e tšoanang lintho tse bonahalang castings.Bakeng sa likarolo tsa bohlokoa tse nang le mojaro o phahameng le maemo a thata a ho sebetsa ka mochini, li-forging li sebelisoa haholo ho kenyelletsa poleiti, profil kapa likarolo tsa welding tse nang le sebopeho se bonolo se ka phuthoang.
3, ho forging ho latela mokhoa oa ho theha ho ka aroloa ka: 0 forging e bulehileng (ho forging mahala).Tšebeliso ea matla kapa khatello ea ho etsa tšepe pakeng tsa karolo e ka holimo le e ka tlaase ea li-anti-iron (anvil block) ho fumana lisebelisoa tse hlokahalang, haholo-holo ho qhekella ka letsoho le ho etsa mechine.② Mokhoa oa ho qhekella o koetsoeng.Sekheo sa tšepe se holofetse tlas'a khatello ka phaposing ea forging ea sebopeho se itseng, 'me forging e ka aroloa ka ho forging, forging e batang, forging ea rotary, extrusion joalo-joalo.Ho ea ka deformation mocheso forging ka aroloa ho forging chesang (mocheso sebetsa ke phahameng ho feta mocheso recrystallization ea tšepe letho), forging mofuthu (tlase ho feta mocheso recrystallization) le forging batang (tloaelehileng mocheso).
4, thepa ea ho forging ke haholo-holo likarolo tse fapaneng tsa tšepe ea carbon le alloy steel, e lateloa ke aluminium, magnesium, titanium, koporo le motsoako oa eona.Boemo ba pele ba thepa bo kenyelletsa melamu, liketane tsa ho lahla, li-powders tsa tšepe le litšepe tse metsi.Karo-karolelano ea karolo ea sefapano sa tšepe pele ho deformation ho ea sebakeng sa karolo ea lefu ka mor'a ho senyeha ho bitsoa karo-karolelano ea forging.Khetho e nepahetseng ea ho forging ho feta ho ntlafatsa boleng ba sehlahisoa, ho fokotsa litšenyehelo ho na le kamano e ntle.
Nako ea poso: Jun-01-2021