Ndezvipi zvinhu uye kupisa zvinodikanwa zveSingle Stand Multi-Groove Reducing Rolling Mill

       The rolls ofSingle Stand Multi-Groove Reducing Rolling Millvari pasi pekuchinjika mitoro yekutenderedza uye kupfeka zvisina kuenzana pamapasi akawanda. Ichi chinyorwa chinovhara zvinowanzo shandiswa roll zvinhu, zviratidzi zvekushanda, kutsanangurwa kwekupisa kwekupisa, uye kutariswa kwekupisa kwekupisa kune akawanda-pass rolls.

       Imwe-inomira yakawanda-inopfuura saizi yekudzikisa chigayo inoshanda seyakakosha midziyo yekugadzira chubhu. Panguva yekushanda, ma rolls ayo anoramba achioneswa kutenderedza kumanikidza, kuchinjika mitoro, kukweshera kwepamusoro-tembiricha, uye cyclic thermal stress. Kuenzaniswa neyakajairwa single-pass rolls, iyo roll body ye-multi-pass rolls ine akawanda grooved pass. Kusaenzana kwemutoro kugovera pakati pezvipfuura zvinokonzeresa kupfeka kwemuno, spalling, kuputika uye kuputika. Naizvozvo, roll zvinhu kusarudzwa uye kupisa kurapwa maitiro zvakanangana ne roll sevhisi hupenyu, chubhu dimensional kurongeka uye yakagadzikana yekugadzira mutsara mashandiro.

1. Mamiriro Ekushanda Anokanganisa Kusarudzwa Kwezvinhu zveMulti-Pass Rolls eSingle-Stand Sizing Kudzikisa Chigayo.

       1. Multiple grooved passs inogadzirwa pane imwe roll barrel. Kusagadzikana kwekushushikana kwakanyanya kumatunhu emuno nekuda kwekusaenderana kwemutoro wega wega.

       2. Kuenderera mberi kunoputika kunoitika panguva yekukunguruka. Mitengo yekupfeka inosiyana zvakanyanya pakati pepasi pasi uye mapendekete ekupfuura, izvo zvinotungamira kukundikana kusati kwasvika kwega kwega.

       3. Kuchinjana kunopisa nekutonhora mamiriro ezvinhu kunokonzera kuneta kwekupisa pasi pemamiriro ekuderedza kupisa, izvo zvinowanzoita kuti pave nekutsemuka kwenetiweki pamapumburu.

       4. Periodic biting impact inoda roll matrix kuti ive nekusimba kwepamusoro uye kushingirira kwe spalling pane zvakajairika rolls.

       Tichifunga nezvemamiriro ekushanda ari pamusoro, akawanda-pass ekudzikisa rolls haigone kuvimba chete nekuoma kwakanyanya. Musanganiswa wakaenzana wekuramba kupfeka kwepamusoro, simba rematrix, kupisa kuneta kuramba uye kuoma kwesimba kunosungirwa.

2. Common Material Selection for Rolls

2.1 High-Chromium Cast Iron Rolls (Sarudzo Yekutanga Yekudzikisa Kupisa)

       Yakakwira-chromium cast iron ndiyo inonyanya kugamuchirwa zvinhu zvemapumburu e-single-stand multi-pass inopisa chubhu saizi ekudzikisa zvigayo.

       Mabhenefiti: Yakakwira kuomarara carbides inopa yakanakisa kupfeka kuramba uye yekupisa kupfeka kuita, yakakodzera kune yakakwirira-tembiricha yekudzikisa maitiro.

       Zvisingakwanisi: Zvishoma zvishoma kuoma; spalling panzvimbo pepasi inogona kuitika pasi pezvinorema zvinorema.

       Chishandiso: Kudzikisira kupisa, yepakati inotenderedza mutoro uye misa inoenderera kugadzirwa kwechubhu.

2.2 Alloy Ductile Iron Rolls

       Mabhenefiti: Yakaenzana yakazara mechanicha zvivakwa, zvirinani kukanganisa kupikisa uye kupisa kwekuputika kuramba pane yakakwirira-chromium cast iron, yakanaka machinability.

       Mipimo: Kudzikira kwepamusoro kupfeka kuramba kana ichienzaniswa nepamusoro-chromium cast iron.

       Chishandiso: Mamiriro ekutenderera ane inorema kukanganisa uye yakasimba anti-kuparuka zvinodiwa kune akawanda-kupfuura ekudzikisa mayunitsi.

2.3 Forged Simbi Rolls (Kunotonhora Kuderedza / Yakanyanya Precision Zvishandiso)

       Magiredhi akajairwa: CrMo, CrNiMo series alloy forged steel.

       Zvakanakira: Dense matrix, kuomarara kwepamusoro, kusimba kwakasimba kupikisa uye kuomarara kwakanaka nemvumo yakakwana yekugaya.

       Zvinogumira: Yakaderera kupfeka kuramba kukanda simbi mamakisi uye yakakwira mutengo wekugadzira.

       Chishandiso: Cold chubhu saizi kudzikisira, yakakwirira-chaiyo yakatetepa-yakavakirwa chubhu kugadzirwa uye yakaoma kushanda mamiriro ane inorema kukanganisa.

2.4 High-Speed ​​Steel Rolls (Yakakwirira-End Zvishandiso)

       High-speed simbi rolls inoratidzira yakatanhamara kupfeka kuramba uye kuomarara kwakatsvuka nepamusoro-soro yekupisa kuneta kuramba. Nekudaro, ivo vanouya nemutengo wakakwira wezvinhu uye zvakaomesesa kudzora zvinodiwa kune kupisa kurapwa maitiro. Iwo akaiswa mune yakakwirira-kumhanya, yakakwirira-inoda chubhu inoderedza mitsara yekugadzira.

       Sarudzo Nheyo: Ongorora yakanyanya kutenderedza mutoro, kutenderedza tembiricha uye kudzika kwekupfuura kana uchisarudza akawanda-pass rolls. Toughness indexes ichakwidziridzwa zvakanaka pamapendekete ekupasa uko kunetseka kunonangana kudzivirira kutsemuka pamakona ekupasa.

3. Kupisa Kurapa Technical Zvinodiwa kune Inopindirana Rolls

       Chinangwa chekurapa kupisa kwekupisa ndechekuwana dhizaini yekushanda isingapfekere nekuomarara kwepamusoro pamwe neiyo yakaoma matrix. Iyo yekumusoro layer inovimbisa kupfeka kuramba kwe grooved inopfuura nepo matrix ichidzivirira roll kuputsika.

3.1 Kurapa Kupisa Kwepamusoro-Chromium Cast Iron Rolls

       Nzira yekugadzira: Kukanda → Kubvisa Kushungurudzika

       Annealing: Bvisa kukanda kwasara kushushikana uye kunatsiridza kucheka machinability.

       Kudzima: Kudzima mhepo kana kuputika kwemhepo kusimudza kuoma kwepamusoro.

       Kudzikamisa: Kudzikira-kupisa kunobvisa kudzima kushushikana, kudzikamisa microstructure uye kuderedza njodzi yekutsemuka.

       Kuomarara kutsanangurwa: Roll pamusoro kuoma HSD 80 ~ 92 uchichengetedza kuomarara kwakanyanya kweiyo roll core.

3.2 Kupisa Kurapa kweAlloy Ductile Iron Rolls

       Nzira yekugadzira: Kukandira → Kubatanidza → Kukasira Machina → Kudzima + Kupisa

       Kudzora kwakakosha: Gadzirisa chikamu chepearlite mumatrix kuti uvandudze kupisa kuneta kuramba.

       Kuoma kwemhando: HSD 75 ~ 88. Kuenzaniswa neyepamusoro-chromium cast iron, inopa yakakura kuomarara muganho kuti igamuchire inochinjana mijenya mizhinji yeakawanda-pass rolling.

3.3 Kupisa Kurapa kweAlloy Forged Steel Rolls

       Nzira yekugadzira: Kugadzira → Post-forging Annealing → Yakakasha Machina → Kudzima uye Kudzikamisa → Surface Induction Kuomeswa kweRoll → Kudzikira-kupisa

       Kudzima uye kudzikisira: Ita shuwa kusimba kwepamusoro uye kusimba kwakanyanya kweiyo roll matrix.

       Induction surface kuomesa: Ingo wedzera kuomarara kwe grooved work surface uchichengeta kuomarara kuri pakati kuti udzivise embrittlement.

       Kuoma: Kushanda pamusoro HRC 48 ~ 58.

3.4 Kurapa Kwekupisa Kwepamusoro-Speed ​​Steel Rolls

       Maitiro: Kudzimisa-kupisa kwepamusoro + kudziya kwakawanda kuti inyatso kuzadza alloy carbides.

       Hunhu: Huoma hunowora zvishoma nezvishoma pakupisa kwepamusoro (kuoma kwakatsvuka kwakanaka). Kudzora kwakasimba kwekupisa kurapwa deformation kunodiwa. Dimensional kunyatsoita kudzora kweakawanda-pass grooves inonetsa.

4. Special Heat Treatment Zvinofungwa kune Single-Stand Multi-Pass Rolls

1. Stress Concentration Control yeMulti-Pass Geometry

       Pfuura mapendekete uye makona ekupfuura inzvimbo dzakanyanya kunetseka. Munguva yekupisa kupisa, kupisa uye kutonhora mitengo kunofanirwa kudzorwa kudzivirira kudzima mitswe pamakona ekupfuura. Kupisa kwakazara mushure mekudzima kunoderedza kusara kunetseka. Uyu ndiwo mutsauko wakanyanya kunetsa pakati peakawanda-pass rolls uye single-pass rolls.

2. Kuoma Kufanana Kudzora

       Multiple grooved passs inogadzirwa pane imwechete roll. Kutsauswa kwekuoma kwenzvimbo yekushanda kumativi ose mushure mekupisa kupisa kunofanira kuchengetedzwa mukati memiganhu inogamuchirwa. Husina-uniform kuomarara kunoita kuti kusapindirana kupfekedzwa kwemapasi akasiyana uye kuchinjika kwechubhu yekunze dhayamita kushivirira.

3. Heat Treatment Deformation Control

       Multi-pass rolls inoratidzira dhiramu refu uye akawanda grooves. Kupisa kurapwa deformation kunokanganisa zvakananga concentricity yepasi. Kukwidziridzwa kwekupisa kwekugadzirisa kupisa uye nzira yekutonhora kunodiwa. Yakawandisa deformation inowedzera inotevera regrinding basa.

4. Residual Stress Inspection

       Residual stress ichaongororwa mushure mekupisa kupisa. Kunyanya kusarira kunetseka kunogona kutanga kuneta kutsemuka kunotanga kubva pamakona ekupfuura pasi pemitoro yakasimudzwa inotenderedzwa uye zvinokonzeresa kutadza kurongeka nguva isati yakwana.

5. Kuwirirana pakati peRoll Material, Kupisa Kurapa uye Kukundikana Modes

       Rapid pass surface kupfeka: Kusakwana kuoma kwepamusoro kana kuderera kwe carbide yezvinhu.

       Kutsemuka uye kupenga pamakona ekupfuura: Kunyanya kusara kunetseka mushure mekurapwa kwekupisa, kusakwana kuoma uye kukuvara kwekuneta kwekupisa.

       Chipping uye spalling of pass surface: Brittle hard surface layer ine isina kukwana matrix kuoma kana kusakwana kwekudzima.

       Kusiyana kwakakosha kwekupfeka pakati pevapfuura: Kusaenzana kuomarara mushure mekupisa kurapwa kwakasanganiswa nekusanzwisisika rolling mitoro kugovera.

6. Mhedziso

       Zvishandiso uye zvigadziriso zvekupisa zvigadziriso zvema rolls e-single-stand multi-pass saizi yekudzikisa mill haigone kutorwa zvakananga kubva kumayero e-single-pass rolls. Iko kusungirirwa kwekushushikana uye kusaenzana mutoro wakaunzwa neakawanda-pass grooved geometry inoda chiyero pakati pekupfeka kuramba uye kuoma mukusarudzwa kwezvinhu. Kurapa kwekupisa kunofanirwa kutarisa kune kwasara kushushikana munzvimbo dzine grooved, kuomarara kufanana uye kupisa kurapwa deformation. Kuenzanisa kwakaringana kwezvinhu uye maitiro ekupisa ekurapa anowedzera roll sevhisi kutenderera, inodzikamisa chubhu yekunze dhayamita, ovality uye mamwe ma indexes akapera, uye inoderedza downtime uye roll yekutsiva mutengo.