1. Vim li cas lub zog tsim nyog yog qhov tseem ceeb rau kev tsheb ciav hlau bolts?
Tsim nyog torque yog ib qho tseem ceeb rau txoj kev tsheb ciav hlau bolts vim nws ua kom lub zog clamping raug ntawm txoj kev tsheb ciav hlau thiab pw tsaug zog. Tsim nyog torque tsim kev sib txhuam uas tiv thaiv kev vibrations thiab lateral zog tsim los ntawm cov tsheb ciav hlau, tiv thaiv lub bolt los ntawm loosening lub sij hawm. Yog tias lub zog qis dhau lawm, lub ntsia liaj qhov rooj yuav plam nyob rau hauv kev ntxhov siab ntau zaus, ua rau kev tsheb ciav hlau txav thiab muaj peev xwm derailment. Yog tias torque siab dhau lawm, lub ntsia liaj qhov rooj yuav ncab tshaj nws txoj kev txwv elastic, ua rau nws tsis muaj zog thiab ua rau muaj kev pheej hmoo ntawm kev tawg. Torque specifications yog txiav txim siab raws li qhov loj ntawm lub ntsia liaj qhov rooj, cov khoom siv, thiab kev tsim qauv, thiab ua raws li lawv ua kom cov ntsia liaj qhov rooj ua tau zoo thoob plaws hauv nws lub neej kev pabcuam.
2. Dab tsi yog qhov tseem ceeb ntawm corrosion nyob rau hauv railway bolts?
Corrosion nyob rau hauv railway bolts feem ntau yog tshwm sim los ntawm raug ya raws, oxygen, thiab cov kab mob. Los nag, daus, thiab cov av noo siab tsim ib qho chaw ntub dej uas ua rau xeb tsim ntawm cov hlau tsis muaj kev tiv thaiv. Cov chaw lag luam lossis thaj chaw ntug dej hiav txwv tuaj yeem qhia cov tshuaj tiv thaiv kab mob ntxiv, xws li ntsev (los ntawm cov dej hiav txwv los yog de-icing ntsev), tshuaj lom neeg, los yog cov pa phem, uas cuam tshuam nrog lub qhov rooj ntawm qhov chaw. Cov kua dej tsis zoo nyob ib puag ncig ntawm txoj kev taug kev tuaj yeem cuam tshuam cov dej nyob ze ntawm lub bolts, ua rau corrosion tsis zoo. Tsis tas li ntawd, khawb lossis puas tsuaj rau cov txheej tiv thaiv (xws li zinc plating) nthuav tawm cov hlau hauv qab rau cov ntsiab lus corrosive, ua rau muaj kev xeb hauv zos.
3. Yuav ua li cas railway rail bolts txawv los ntawm kev lag luam bolts?
Railway khiav bolts txawv ntawm kev lag luam bolts nyob rau hauv ntau yam tseem ceeb. Lawv tau tsim los tiv taus ntau dua dynamic loads thiab vibrations, raws li cov tsheb ciav hlau siv tas li siab thiab txav ntawm txoj kev. Track bolts feem ntau yog ua los ntawm ntau dua - lub zog steel alloys los tiv thaiv qaug zog thiab deformation, whereas industrial bolts yuav siv cov qauv hlau. Lawv qhov ntev kuj tseem tshwj xeeb rau kev tsheb ciav hlau thiab cov neeg pw tsaug zog, nrog cov shanks ntev thiab cov kab uas loj dua kom haum rau cov tuab ntawm cov tsheb ciav hlau thiab cov pw tsaug zog. Ntau cov bolts tseem muaj cov taub hau tshwj xeeb lossis cov xov (xws li, lub taub hau square kom yooj yim tuav nrog cov cuab yeej) thiab tej zaum yuav muaj xws li tiv thaiv- cov coatings coatings haum rau sab nraum zoov, siab - ib puag ncig kev ntxhov siab.
4. Yam dab tsi cuam tshuam rau lub neej ntawm txoj kev tsheb ciav hlau bolts?
Lub neej ntev ntawm txoj kev tsheb ciav hlau bolts yog cuam tshuam los ntawm ntau yam, suav nrog cov khoom zoo, ib puag ncig, kev saib xyuas, thiab kev ua haujlwm nyuaj. High-zoo, corrosion- cov ntaub ntawv tiv taus (xws li galvanized lossis hlau alloy) tuaj yeem ua rau lub neej ntev los ntawm kev tiv thaiv xeb thiab hnav. Ib puag ncig hnyav-xws li thaj chaw ntug hiav txwv uas muaj ntsev los yog thaj chaw ua lag luam uas muaj kuab paug-ua rau lub neej luv vim qhov ua kom muaj zog corrosion. Kev saib xyuas tsis tu ncua, suav nrog re- torqueing thiab hloov cov bolts puas, tuaj yeem ua rau lub neej ua haujlwm ntev, thaum kev tsis saib xyuas tso cai rau cov teeb meem me ntxiv. Lub tsheb ciav hlau hnyav, siab - tsheb ciav hlau ceev, thiab nquag pib / nres ua rau muaj kev vibration thiab kev ntxhov siab ntawm cov bolts, ua rau muaj kev qaug zog sai thiab muaj peev xwm ua tsis tiav.
5. Dab tsi thoob ntiaj teb cov qauv tswj kev tsim cov railway bolts?
Railway khiav bolts yog raug rau ntau yam thoob ntiaj teb cov qauv los xyuas kom meej zoo thiab kev nyab xeeb. Lub International Union of Railways (UIC) tau teeb tsa cov qauv xws li UIC 860-4, uas qhia meej txog cov kev cai rau kev taug qab fasteners, suav nrog cov bolts. Hauv Tebchaws Europe, EN 14399 series (piv txwv li, EN 14399-3) suav nrog siab- lub zog ntawm cov ntsia hlau, qee qhov tau hloov kho rau kev siv tsheb ciav hlau. Hauv Tebchaws Meskas, American Society of Mechanical Engineers (ASME) thiab American Railway Engineering thiab Maintenance-of-Way Association (AREMA) muab cov lus qhia rau bolt cov ntaub ntawv, qhov ntev, thiab kev ua haujlwm. Cov qauv no txhais cov tsis xws li tensile lub zog, torque qhov tseem ceeb, thiab corrosion kuj, kom ntseeg tau tias bolts los ntawm txawv manufacturers yog interchangeable thiab txhim khu kev qha.