Litlhokahalo tsa kalafo ea thepa le mocheso bakeng sa Single Stand Multi-Groove Reducing Rolling Mill ke life

       Meqolo eaSingle Stand Multi-Groove Reducing Rolling Millli tlas'a meroalo e fapa-fapaneng le ho apara ka tsela e sa tšoaneng ho pholletsa le liphase tse ngata. Sengoliloeng sena se akaretsa lisebelisoa tse sebelisoang hangata, matšoao a ts'ebetso, litlhaloso tsa kalafo ea mocheso, le lintlha tsa bohlokoa tsa kalafo ea mocheso bakeng sa meqolo e mengata ea li-pass.

       Single-stand multi-pass recing sizeing e sebetsa e le lisebelisoa tsa mantlha tsa ho etsa li-tube. Nakong ea ts'ebetso, lirolo tsa eona li lula li pepesetsoa khatello ea maikutlo, ho fapanyetsana matla a matla, likhohlano tse phahameng tsa mocheso le khatello ea mocheso oa cyclic. Ha ho bapisoa le meqolo e tloaelehileng ea li-single-pass rolls, sehlopha sa meqolo ea li-multi-pass rolls se na le li-multiple grooved pass. Kabo e sa leka-lekaneng ea mojaro har'a lipalangoang e etsa hore ho be bonolo hore motho a senyehe, a qhekelle, a petsohe le ho petsoha. Ka hona, khetho ea thepa ea moqolo le ts'ebetso ea kalafo ea mocheso ka kotloloho li etsa qeto ea bophelo ba tšebeletso ea roll, ho nepahala ha tube dimensional le ts'ebetso e tsitsitseng ea mohala oa tlhahiso.

1. Maemo a Ts'ebetso a Amang Khetho ea Thepa bakeng sa Multi-Pass Rolls ea Single-Stand Sizing Reducing Mill.

       1. Multiple grooved passs are machined on one roll barrel. Khatello ea maikutlo e hlahella libakeng tsa lehae ka lebaka la boima bo sa tsitsang sebakeng se seng le se seng.

       2. Ho roala ho sa khaotseng ho etsahala nakong ea ho roala. Litefiso tsa ho apara li fapana haholo pakeng tsa li-pass bottoms le mahetleng a li-pass, e leng se lebisang ho hloleheng pele ho nako ea motho ka mong.

       3. Maemo a fapa-fapaneng a chesang le a batang a baka mokhathala oa mocheso tlas'a maemo a chesang a ho fokotsa, a atisang ho hlahisa marako a marang-rang holim'a marang-rang.

       4. Tšusumetso ea nako le nako ea ho loma e hloka hore roll matrix e be le boima bo phahameng le ho hanyetsa ha spalling ho feta lirolo tse tloaelehileng.

       Ho latela maemo a kaholimo a ts'ebetso, li-roll tse fokotsang li-pass tse ngata li ke ke tsa itšetleha feela ka boima bo phahameng. Motsoako o leka-lekaneng oa ho hanyetsa ho apara ka holim'a metsi, matla a matrix, ho hanyetsa mokhathala oa mocheso le ho ba le tšusumetso e matla ke ntho e tlamang.

2. Tloaelehileng Material Selection bakeng sa Rolls

2.1 High-Chromium Cast Aron Rolls (Khetho ea mantlha ea ho Fokotsa Mocheso)

       High-chromium cast iron ke thepa e amohetsoeng ka ho fetesisa bakeng sa merolo ea li-multi-pass multi-pass hot sizeing mill e fokotsang.

       Melemo: Li-carbides tse thata tse phahameng li fana ka khanyetso e ntle ea ho apara le ts'ebetso ea ho apara ka mocheso, tse loketseng mekhoa ea ho fokotsa mocheso o phahameng.

       Mefokolo: Ho ba le boima bo fokolang; spalling holim'a holim'a lipasa li ka etsahala tlas'a meroalo e boima ea tšusumetso.

       Kopo: Phokotso e chesang, moroalo o mahareng le tlhahiso e tsoelang pele ea li-tube.

2.2 Alloy Ductile Iron Rolls

       Melemo: Thepa e leka-lekaneng e felletseng ea mochini, ho hanyetsa tšusumetso e ntle le ho hanyetsa mocheso ho feta tšepe e entsoeng ka chromium e phahameng, machinability e ntle.

       Meeli: Ho hanyetsa ho apara ka tlase ha ho bapisoa le tšepe e entsoeng ka chromium e phahameng.

       Kopo: Lits'oants'o tse nang le tšusumetso e matla le litlhoko tse thata tse khahlanong le ho peperana bakeng sa likarolo tse fokotsang liphase tse ngata.

2.3 Lirolo tsa tšepe tse Forged (Ho Fokotsa Mohatsela / Lits'ebetso tse nepahetseng haholo)

       Limaraka tse tloaelehileng: CrMo, CrNiMo series alloy forged steel.

       Melemo: Matrix e teteaneng, boima bo phahameng, khanyetso e matla ea ho hanyetsa le ho thatafala ka thata ka tumello e lekaneng ea ho tsosolosa.

       Meeli: Ho hanyetsa ho apara ka tlaase ho maemo a tšepe a tšepe le litšenyehelo tse phahameng tsa tlhahiso.

       Kopo: Phokotso ea boholo ba li-tubes tse batang, tlhahiso ea li-tube tse tšesaane ka mokhoa o phahameng haholo le maemo a thata a ho sebetsa a nang le tšusumetso e matla.

2.4 Lirola tsa tšepe tsa lebelo le phahameng (Lits'ebetso tse phahameng)

       Li-roll tsa tšepe tse lebelo le phahameng li na le khanyetso e ikhethang ea ho apara le boima bo bofubelu bo nang le khanyetso e phahameng ea mocheso oa mokhathala. Leha ho le joalo, li tla le litšenyehelo tse phahameng tsa thepa le litlhoko tse thata tsa taolo bakeng sa mekhoa ea phekolo ea mocheso. Li kenngoa ka lebelo le phahameng, le tlhokahalo e phahameng ea li-tube tse fokotsang mela ea tlhahiso.

       Molao-motheo oa ho khetha: Lekola boima bo holimo, mocheso o bilikang le botebo ba ho feta ha u khetha li-roll tsa li-multi-pass. Li-index tsa toughness li tla ntlafatsoa hantle mahetleng a li-pass moo khatello ea maikutlo e tsepameng ho qoba ho peperana likhutlong tsa lipasa.

3. Litlhokahalo tsa Teknoloji ea Phekolo ea Mocheso bakeng sa Meqolo e Tšoanang

       Sepheo sa phekolo ea mocheso oa roll ke ho finyella sebaka se sebetsang se sa sebetseng se nang le boima bo phahameng hammoho le matrix a thata. Bokaholimo bo tiisa hore ho na le ho hanyetsa ha li-grooved pass ha matrix e thibela ho robeha ha roll.

3.1 Ts'ebetso ea Kalafo ea Mocheso bakeng sa Lirolo tsa Tšepe tsa High-Chromium Cast

       Tsela ea ho sebetsa: Ho Lahlela → Ho Imolla Khatello ea Maikutlo → Ho sebetsa ka thata → Ho tima → Ho futhumatsa

       Annealing: Felisa khatello ea kelello e setseng le ho ntlafatsa machinability ea ho itšeha.

       Quenching: Ho tima moya kapa ho tima moya ho phahamisa boima ba bokahodimo.

       Tempering: Mocheso o tlase oa mocheso ho tlosa khatello ea maikutlo, ho tsitsisa microstructure le ho fokotsa kotsi ea ho phatloha.

       Tlhaloso ea boima: HSD 80 ~ 92 ea holim'a metsi ha u ntse u boloka boima bo phahameng ba roll core.

3.2 Kalafo ea Mocheso bakeng sa Alloy Ductile Iron Rolls

       Tsela ea ts'ebetso: Ho Lahlela → Ho Aneha → Mochini o Khopo → Ho tima + Ho futhumatsa

       Taolo ea bohlokoa: Tsitsisa karoloana ea pearlite ka har'a matrix ho ntlafatsa ho hanyetsa mokhathala oa mocheso.

       Boholo ba boima: HSD 75 ~ 88. Ha e bapisoa le tšepe e entsoeng ka chromium e phahameng, e fana ka matla a maholo a ho lumellana le litšusumetso tse ngata tsa li-pass rolling.

3.3 Kalafo ea Mocheso bakeng sa Alloy Forged Steel Rolls

       Tsela ea ts'ebetso: Ho theha → Ho kopanya ka mor'a ho qhekella → Ho sebetsa ka thata → Ho tima le ho halefisa → Ho thatafatsa ha Mohaho oa Mohatla → Mocheso o tlase oa mocheso

       Ho tima le ho halefa: Etsa bonnete ba hore o na le matla a phahameng le ho tiea ho hoholo ha roll matrix.

       Ho thatafala ha bokaholimo ba induction: Eketsa feela ho thatafala ha bokaholimo ba ho sebetsa ha o ntse o boloka boima bo le mantlha ho qoba ho putlama ka kakaretso.

       Ho thatafala: Sebaka sa ho sebetsa HRC 48 ~ 58.

3.4 Kalafo ea Mocheso bakeng sa Lirola tsa tšepe tsa lebelo le phahameng

       Ts'ebetso: Ho tima mocheso o phahameng + mocheso o mongata ho fana ka li-carbide tsa alloy ka botlalo.

       Litšobotsi: Ho thatafala ho bola butle ka mocheso o phahameng (boima bo bofubelu bo botle). Ho hlokahala taolo e tiileng ea deformation ea phekolo ea mocheso. Taolo ea ho nepahala ha li-multi-pass grooves e thata.

4. Litlhaloso tse Khethehileng tsa Phekolo ea Mocheso bakeng sa Li-Roll tsa Single-Stand Multi-Pass

1. Taolo ea Maikutlo a Khatello ea Khatello bakeng sa Geometry ea Multi-Pass

       Mahetla a ho feta le likhutlo tse fetang ke libaka tse nang le khatello ea maikutlo. Nakong ea phekolo ea mocheso, litekanyetso tsa ho futhumatsa le ho pholisa li tlameha ho laoloa ho thibela ho tima mapetsong a li-pass. Ho halefa ka ho feletseng ka mor'a ho tima ho fokotsa khatello ea kelello e setseng. Ena ke phapang ea bohlokoa ka ho fetisisa lipakeng tsa li-multi-pass rolls le li-single-pass rolls.

2. Ho Thata ho Uniformity Taolo

       Likarolo tse ngata tsa grooved li entsoe ka moqolo o le mong. Ho kheloha ho thata ha libaka tsa mosebetsi ho pholletsa le litsela tsohle ka mor'a phekolo ea mocheso ho tlameha ho bolokoa ka har'a meeli e amohelehang. Ho thatafala ka mokhoa o sa tšoaneng ho lebisa ho apara ho sa tsitsang ha liphase tse fapaneng le ho feto-fetoha ha ho mamellana ha bophara ba tube ka ntle.

3. Taolo ea ho Fetola Phekolo ea Mocheso

       Li-multi-pass rolls li na le moqomo o molelele le li-grooves tse ngata. Phekolo ea mocheso deformation e ama ka ho toba concentricity ea lipasa. Hoa hlokahala ho ntlafatsa mokhoa oa ho phekola mocheso le mokhoa oa ho pholisa. Deformation e feteletseng e eketsa mosebetsi o latelang oa ho khutlisa.

4. Tlhahlobo ea Khatello ea Khatello e Meng

       Khatello e setseng e tla hlahlojoa ka mor'a phekolo ea mocheso. Khatello e phahameng ea mesaletsa e ka 'na ea baka mapetsong a mokhathala a qalang ho tloha likhutlong tsa liphase ka tlas'a meroalo e feto-fetohang 'me ea baka ho hloleha ha moqolo pele ho nako.

5. Kamano Pakeng Tsa Roll Material, Phekolo ea Mocheso le Mekhoa ea ho Hloka

       Ho apara kapele: Ho se be thata ka holim'a metsi ho sa lekaneng kapa likarolo tse tlase tsa carbide ea thepa ea roll.

       Mapetso le ho hlanya likhutlong tsa li-pass: Khatello e feteletseng ea masala ka mor'a kalafo ea mocheso, boima bo sa lekaneng le tšenyo ea mokhathala oa mocheso.

       Chipping and spalling of the pass surface: Moalo o thata o thata o boreleli o nang le boima bo sa lekaneng ba matrix kapa mokhoa o sa lokelang oa ho tima.

       Ho se tšoane ho hoholo ha liphase: Ho thatafala ka mokhoa o sa leka-lekaneng ka mor'a kalafo ea mocheso ho kopantsoe le kabo e sa utloahaleng.

6. Qetello

       Merero ea kalafo ea thepa le mocheso bakeng sa lirolo tsa leloala le nang le li-multi-pass-multi-pass sizeng mill e ke ke ea amoheloa ka kotloloho ho tsoa ho litekanyetso tsa li-roll-pass rolls. Khatello ea maikutlo le mojaro o sa lekaneng o hlahisoang ke geometry ea li-multi-pass grooved e hloka ho leka-lekana pakeng tsa ho hanyetsa le ho thatafala ha khetho ea thepa. Kalafo ea mocheso e lokela ho shebana le khatello ea maikutlo e setseng libakeng tse nang le grooved, ho thatafala ho ts'oanang le ho senyeha ha mocheso oa mocheso. Ho tsamaisana hantle ha thepa le mekhoa ea phekolo ea mocheso ho atolosa potoloho ea tšebeletso ea roll, ho tsitsisa bophara ba tube ea ka ntle, ovality le li-index tse ling tse felileng, 'me ho fokotsa litšenyehelo tsa ho fokotsa nako le moqolo.