Kev sib tw ntawm kev sib tsoo pob zeb localization

Kev tshuaj xyuas saum toj no ntawm cov kev tshawb fawb tam sim no ntawm whetstone los ntawm cov yam ntxwv ntawm whetstone molding (cov khoom siv raw thiab cov txheej txheem), whetstone kev ntsuas kev ua tau zoo, kev tsheb ciav hlau kub hnyiab, thiab lwm yam, xaus lus tias kev tsim thiab tsim khoom ntawm whetstone yog ib qho kev qhia ntau yam (mechanics, khoom siv, mechanics, thiab lwm yam), complex (cov khoom siv, kev sib tw, kev sib tw, thiab lwm yam.) Yog li ntawd, cov hauv qab no yog cov ntsiab lus ntawm cov teeb meem thiab cov teeb meem uas tau ntsib nyob rau hauv kev tshawb fawb thiab kev loj hlob txheej txheem ntawm whetstone los ntawm peb yam: whetstone molding, whetstone / rail interface tus cwj pwm, thiab whetstone kev ua tau zoo kev soj ntsuam (Daim duab 1), aiming muab tej yam kev qhia rau cov kws tshawb fawb thiab practitioners.

(1) Millstone Moulding

Kev ua haujlwm ntawm whetstone yog cuam tshuam los ntawm kev tsim (resin, muab tub lim, abrasive, thiab lwm yam), txheej txheem molding (sib tov, kho, thiab lwm yam), qauv (porosity thiab pore loj, abrasive concentration, thiab lwm yam), thiab heterogeneous interfaces (resin / abrasive, resin / filler, thiab lwm yam) kev sib txuas lub zog thiab lwm yam, raws li qhia hauv daim duab 1. Tam sim no, heterogeneous interface bonding mechanism ntawm abrasive system tsis meej; micro / nano muab tub lim rau ntawm daim ntawv cog lus toughness, tshav kub tsis kam, hnav tsis kam ntawm cov txheej txheem tswj yuav tsum tau nthuav tawm; complex abrasive pob zeb qauv ntawm lub cev thiab tshuaj lom neeg cov khoom ntawm lub pob zeb abrasive, cov txheej txheem ntawm kev cuam tshuam ntawm kev ua haujlwm ntawm kev pabcuam kev ua haujlwm tseem tsis tau paub meej. Cov teeb meem kev tshawb fawb thiab kev ua haujlwm saum toj no coj cov teeb meem loj rau kev tswj hwm kev ua haujlwm ntawm kev sib tsoo pob zeb.

Yuan Yongjie [1] siv Abaqus thiab Python los tsim cov qauv millstone virtual, thiab ua cov kev tshawb fawb txog millstone los ntawm cov txheej txheem ntawm kev suav cov ntsiab lus, uas yog ib qho tseem ceeb kev tshoov siab rau kev tsim millstones nrog ntau qhov sib txawv thiab cov txheej txheem nyuaj. Yog li ntawd, nyob rau hauv lub neej yav tom ntej, peb muaj peev xwm siv finite caij thiab lwm txoj kev los tsim lub millstone qauv sai thiab zoo, thiab tsim ib tug finer spectrum ntawm synergistic teb kev sib raug zoo ntawm ntau yam tseem ceeb los coj tus tsim ntawm millstones. Thiab tus qauv yog tsim nyog los ntawm ib tug loj npaum li cas ntawm cov ntaub ntawv sim sim.

(2) Abrasive pob zeb / rail interface tus cwj pwm

Abrasive geometry, spatial orientation muaj randomness, ua rau muaj qhov sib txawv loj nyob rau hauv pem hauv ntej lub kaum sab xis ntawm kev sib tsoo abrasive (sliding, plowing, txiav) txheej txheem, thiab yog li lub luag haujlwm ntawm txhua qhov abrasive ntawm cov khoom siv tsheb ciav hlau (mechanical force, sib tsoo kub, thiab lwm yam) kuj yog random, thiab yog li muaj qhov sib txawv ntawm cov pob zeb zoo, qhov tsis ua hauj lwm ntawm cov txheej txheem. Qhov zoo tshaj plaws: lub abrasive tom qab ntau lub voj voog ntawm kev puas tsuaj - tus kheej-sharpening txheej txheem, muab kev ua si tag nrho rau nws txoj haujlwm txiav; daim ntawv cog lus hnav thiab shedding, thiaj li hais tias tus passivated abrasive tawm, sib tsoo pob zeb nws tus kheej-sharpening; Tab sis ntau dhau hnav ntawm daim ntawv cog lus, ua rau ntxov ntxov ntawm cov abrasive, abrasive siv tus nqi txo, cov abrasive hnav tsis kam ntawm cov pob zeb sib tsoo yog txo, shortening cov kev pab cuam lub neej. Yog li ntawd, kev hnav thiab nws tus kheej-sharpening ntawm cov pob zeb sib tsoo yuav tsum ncav cuag lub xeev sib npaug, thiaj li ua kom cov pob zeb sib tsoo ob qho tib si muaj zog txiav kev ua haujlwm thiab kev ua haujlwm ntev. Nyob rau tib lub sijhawm, kev hnav ntawm cov pob zeb sib tsoo ncaj qha cuam tshuam rau cov npoo npoo thiab txiav lub kaum sab xis, uas cuam tshuam rau kev sib tsoo txheej txheem sib tsoo cov cua sov thiab cov kab tsheb ciav hlau zoo. Yog li, nws tuaj yeem pom tau tias nyob rau hauv cov txheej txheem ntawm kev sib tsoo, nyob rau hauv thermal-mechanical coupling ntawm kev sib tsoo pob zeb / rail interface, cov khoom tshem tawm thiab tsis ua haujlwm ntawm kev sib tsoo pob zeb cuam tshuam rau ib leeg thiab muaj kev sib raug zoo, uas thaum kawg cuam tshuam rau qhov zoo ntawm txoj kev tsheb ciav hlau tom qab sib tsoo.

Tam sim no, kev sib cuam tshuam ntawm cov khoom siv tshem tawm thiab whetstone tsis ua haujlwm hauv txoj kev tsheb ciav hlau sib tsoo thiab nws cov kev cuam tshuam ntawm qhov zoo ntawm txoj kev tsheb ciav hlau tseem tsis tau paub meej, uas txhim kho qhov tsim teeb meem ntawm whetstone, raws li qhia hauv daim duab 1(b). Yog li ntawd, nws yog ib qho tseem ceeb kom kawm txog cov txheej txheem ntawm kev tshem tawm cov khoom siv thaum lub sij hawm sib tsoo cov txheej txheem, hnav mechanism ntawm whetstone, evolution ntawm rail deg zoo, thiab tsim lub cev kev sib raug zoo qauv ntawm whetstone qauv - txhua yam khoom ntawm whetstone - kev sib tsoo kev ua tau zoo - tsis ua hauj lwm mechanism ntawm whetstone - nto zoo ntawm rail, uas yog muaj nuj nqis heev rau kev tsim thiab siv ntawm whetstone.

(3) Kev ntsuam xyuas ntawm kev sib tsoo pob zeb ua haujlwm

Kev soj ntsuam thiab kev ntsuam xyuas ntawm kev sib tsoo pob zeb kev ua tau zoo (tshwj xeeb yog muaj peev xwm sib tsoo), sib tsoo pob zeb mis, txheej txheem tsim muab ib qho tseem ceeb siv. Tam sim no, muaj ntau txoj hauv kev los ntsuam xyuas qhov kev ua tau zoo ntawm whetstone, thiab tsis muaj cov qauv kev ntsuas tsis zoo rau kev ua haujlwm ntawm whetstone, uas ua rau nws nyuaj rau kev qhia cov txiaj ntsig kev tshawb fawb txog whetstone, raws li qhia hauv daim duab 1(c). Lub caij no, tam sim no, ntau tus kws tshawb fawb tau ua cov kev tshawb fawb ntsig txog los ntawm kev npaj cov pob zeb loj tag nrho, uas muaj qhov loj me, uas tsis zoo rau tom qab macro/micro characterization thiab tsom xam, thiab tsis tuaj yeem tau txais cov ntaub ntawv sim zoo dua, ua rau kev sim cov txiaj ntsig ntawm millstones nrog kev txwv tsis pub coj mus rau txoj cai ntawm millstones 'kev tshawb fawb thiab kev loj hlob ntawm cov pob zeb, uas txo cov nqi ntawm cov pob zeb. kev tshawb fawb, thiab ua rau cov pov tseg ntawm lub zog thiab cov khoom siv raw. Yog li ntawd, txoj kev ntsuam xyuas ntau yam thev naus laus zis tuaj yeem siv los tsim kev tshawb fawb txog kev sib tsoo pob zeb ntsuas cov cuab yeej thiab tsim cov txheej txheem kev soj ntsuam rau kev ua tau zoo ntawm kev sib tsoo pob zeb nyob rau hauv ntau qhov ntev, thiaj li tsim lub hauv paus rau kev txhawb nqa kev sib tsoo pob zeb hauv cov kab tsheb ciav hlau.

Fig.1 Cov teeb meem tseem ceeb rau kev txhim kho GS

(a) Grindstone Tsim [2,3,1]; (b) Kev sib raug zoo ntawm cov cuab yeej tshem tawm cov khoom, Grindstone Wear Mechanisms, thiab Rail Surface Quality [4,5,6,7,8]; (c) Grindstone Performance Evaluation Methods [9,2,10].

[1] YUAN Yongjie. Kev Ua Haujlwm Kev Tswj Xyuas Cov Txheej Txheem ntawm Rail Sib Tsoo Pob Zeb nrog Pore Structure [J]. Chengdu: Southwest Jiaotong University, 2021.

[2] Zhang Wulin. Kawm txog Kev Ua Haujlwm Kev Tswj Xyuas Kev Ua Haujlwm ntawm Kev Kub Ceev Rail Sib Tsoo Pob Zeb ntawm Corundum Abrasives [D]. Chengdu: Southwest Jiaotong University, 2021.

[3] Zhang Pengfei, Zhang Wulin, YUAN Yongjie, et al. Kev soj ntsuam qhov cuam tshuam ntawm kev sib tsoo-kub ntawm cov khoom tshem tawm Mechanism ntawm Rail Sib Tsoo[J]. Tribology International, 2020, 147:105942.

[4] JI Yuan, TIAN Changhai, PEI Dingfeng. Sib piv kev soj ntsuam ntawm Suav Rail Sib Tsoo Wheel Standards thiab Foreign International Standards [J]. Railway Quality Control, 2018, 46(9): 5-8.

[5] Zhou Kun, Ding Haohao, WANG Wenjian, et al. Kev cuam tshuam ntawm kev sib tsoo siab ntawm kev tshem tawm tus cwj pwm ntawm Rail Material[J]. Tribology International, 2019, 134: 417-426.

[6] Zhou Kun, Ding Haohao, WANG Ruixiang, et al. Kev Tshawb Fawb Kev Tshawb Fawb Txog Kev Tshem Tawm Cov Khoom Siv Thaum Rail Sib Tsoo ntawm Kev Sib Tw Sib Tw [J]. Tribology International, 2020, 143: 106040.

[7] Zhang Wulin, ZHANG Pengfei, Zhang Jun, et al. Kev soj ntsuam qhov cuam tshuam ntawm Abrasive Grit Loj ntawm Rail Sib Tsoo Cwj Pwm [J]. Phau ntawv Journal of Manufacturing Processes, 2020, 53: 388-395.

[8] JOACHIM Mayer, ROBERT Engelhorn, ROSEMARIE Rot, et al. Hnav cov yam ntxwv ntawm Second-theem-reinforced Sol-gel Corundum Abrasives [J]. Acta Materialia, 2006, 54(13): 3605-3615.

[9] XU Xiaotang. Kawm txog Mechanism of High Speed ​​Rail Sib Tsoo[D]. Chengdu: Southwest Jiaotong University, 2016.

[10] XU Xiaotang, WANG Hengyu, WU Lei, et al. Kev Tshawb Fawb Kev Tshawb Fawb Txog Kev Kub Ceev Rail Sib Tsoo nyob rau hauv Wet Condition [J]. Lubrication Engineering, 2016, 41(11): 41-44.