1. Dab tsi yog cov kauj ruam kev teeb tsa rau txoj kev tsheb ciav hlau fastening, thiab vim li cas lawv tseem ceeb?
Cov kauj ruam ntawm kev txhim kho muaj xws li: tu cov tsheb ciav hlau / cov chaw pw tsaug zog (tshem tawm cov khib nyiab), ua kom lub hauv paus daim hlau nrog lub qhov rooj, muab cov ntaub qhwv insulating (yog tias xav tau), tso cov clips / bolts, thiab siv lub zog tshwj xeeb. Rau elastic clips, cov cuab yeej tshwj xeeb (xws li, Pandrol clip inserters) xyuas kom zoo compression. Torque qhov tseeb (± 5%) yog qhov tseem ceeb-nyob rau hauv- zawm ua rau xoob, dhau - zawm txoj kev pheej hmoo clip/bolt tsis ua hauj lwm. Tom qab- kev teeb tsa kev kuaj xyuas kev sib tw tsheb ciav hlau (gauge ± 1mm) thiab clip nro. Kev teeb tsa tsis raug suav nrog 40% ntawm kev ua tsis tiav, ua rau kev cob qhia thiab ntsuas cov cuab yeej tseem ceeb.
2. Yuav ua li cas fastening systems nyob rau hauv ballastless lem txawv ntawm ballasted lem?
Ballastless lem (pob zeb slabs) siv tsau - puag fasteners (piv txwv li, SKL14) nrog meej alignment (± 0.2mm) kom tsis txhob muaj kev ntxhov siab ntawm cov slabs nruj. Lawv feem ntau bolted ncaj qha rau slabs, nrog tsawg adjustability. Ballasted lem siv adjustable fasteners (piv txwv li, Pandrol e-Clip) uas tso cai rau ntsug / kab rov tav zoo -tuning ntawm shims, haum ballast sib hais haum. Ballastless fasteners xav tau kev tiv thaiv corrosion ntau dua (tsis muaj ballast los tiv thaiv los ntawm ya raws), thaum cov ballasted xav tau kev puas tsuaj (los ntawm pob zeb txav). Kev teeb tsa hauv ballastless lem yog lub sijhawm ntau dua -siv tab sis yuav tsum tau saib xyuas tsawg dua
3. Yuav ua li cas yog cov kev sim rau railway fastening systems (nruj, qaug zog, corrosion)?
Kev ntsuas nruj siv hydraulic presses los ntsuas lub zog clamping (piv txwv li, 25kN rau UIC clips). Fatigue testing subjects fasteners to 10+ million load cycles (simulating train traffic) to detect cracks. Kev kuaj corrosion muaj xws li tshuaj tsuag ntsev (ASTM B117) rau 500+ teev los soj ntsuam cov txheej txheem ntev. Torque- ciaj ntswj calibration kom ntseeg tau tias installation raug, thaum kuaj ultrasonic kuaj xyuas qhov tsis xws luag. Hauv- kev sim teb siv cov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov nro thiab ntsuas ntsuas ntsuas hluav taws xob los kuaj xyuas hluav taws xob. Cov kev ntsuam xyuas no xyuas kom ua raws li cov qauv xws li UIC 860-4 thiab AREMA Tshooj 30.
4. Yuav ua li cas fastening systems nyob rau hauv nqaim -gauge railways txawv ntawm tus qauv-gauge systems?
Nqaim-gauge (tsawg dua lossis sib npaug li 1067mm) cov tshuab siv cov khoom siv me me (piv txwv li, M16 bolts vs. M20) vim qhov hnyav dua. Clips muaj qhov nqaim dua kom haum qhov chaw tsawg ntawm cov ntsia hlau thiab cov neeg pw tsaug zog. Lawv feem ntau yooj yim dua (bolted clamps) rau tus nqi, raws li nqaim- cov kab ntsuas feem ntau muaj qis dua (tsawg dua lossis sib npaug li 80 km / h). Txheem - ntsuas tshuab (1435mm) siv cov khoom siv loj dua, muaj zog dua los tuav cov nrawm dua thiab lub nra hnyav. Nqaim-gauge fasteners precisely adjustability (xws li, slotted qhov) los them rau looser kam rau ua nyob rau hauv cov kab nyob deb nroog, thaum tus qauv -gauge ones tsom rau precision.
5. Dab tsi yog cov khoom sib txuas fastening tshuab, thiab lawv muaj txiaj ntsig dab tsi?
Composite systems siv fiberglass -cov ntaub ntawv polymer (FRP) los yog carbon fiber rau clips, washers, los yog base plates. Cov txiaj ntsig muaj xws li corrosion kuj (tsis muaj xeb), lub teeb yuag (50% sib dua li hlau), thiab hluav taws xob rwb thaiv tsev. Lawv zoo tagnrho rau cov ntug hiav txwv dej, kev lag luam, lossis cov kab hluav taws xob. FRP clips muaj zog piv rau cov hlau (lub zog tensile Ntau dua lossis sib npaug li 800MPa) tab sis kev qaug zog zoo dua. Qhov tsis zoo suav nrog tus nqi siab dua thiab kev cuam tshuam qis dua -lawv tsis tsim nyog rau cov khoom hnyav - thauj khoom. Composite Cheebtsam feem ntau ua ke nrog steel bolts rau qhov sib npaug ntawm lub zog thiab corrosion kuj.