Toothed Engagement Design of Fishplates and Rail Joint Stiffness Matching Technology
Dab tsi yog cov qauv tsim ntawm cov hniav profile meshing qauv ntawm fishplates?
Cov qauv tsim tseem ceeb ntawm cov hniav profile meshing qauv ntawm fishplates suav nroghniav lub kaum sab xis, qhov siab ntawm cov hniav thiab hniav pitch, thiab peb qhov tsis sib koom ua ke txiav txim siab cov nyhuv meshing thiab sib koom ua ke. Lub kaum sab xis ntawm cov hniav feem ntau yog tsim los ntawm 60 degree, uas tuaj yeem ua kom lub siab ib txwm muaj ntawm cov hniav meshing thiab cov kab sib txuas ntawm cov kab sib txuas, txhim kho qhov kev quab yuam, thiab zam cov hniav ntog thaum lub caij tsheb ciav hlau. Cov hniav qhov siab yuav tsum tau tswj ntawm 3-5mm; qhov siab ntawm cov hniav ntau dhau yuav ua rau muaj kev ntxhov siab ntawm cov hniav, uas yooj yim ua rau cov hniav hnav lossis chipping, thaum qhov siab ntawm cov hniav qis heev tsis tuaj yeem tsim cov meshing zoo, uas ua rau cov pob qij txha tsis txaus. Cov hniav pitch yog teem rau ntawm 10-15mm, uas yuav tsum phim lub elastic modulus ntawm txoj kev tsheb ciav hlau los xyuas kom meej uniform kev nyuaj siab thaum lub sij hawm thauj khoom. Cov qauv tsheb sib txawv tau hloov mus rau qhov sib txawv ntawm cov hniav profile; tus ntses phaj rau 60kg / m lub teb chaws tus qauv rails yuav tsum muaj ib tug hniav qhov siab ntawm 4 hli thiab ib tug hniav pitch ntawm 12 hli kom phim nws cov ntaub ntawv siab tawv tawv.
Dab tsi yog qhov sib txawv ntawm qhov sib txawv ntawm cov hniav profile meshing fishplates thiab tiaj tus ntses phaj?
Kev sib koom ua ke sib txawv ntawm cov hniav profile meshing fishplates thiab tiaj tus ntses phaj yog feem ntau xav txog peb yam:nruj nreem txuas, load kis efficiency thiab deformation kuj. Kev sib koom ua ke ntawm cov hniav profile meshing fishplates tuaj yeem ncav cuag ntau dua 95% ntawm cov khoom siv tsheb ciav hlau nruj, uas tuaj yeem paub txog kev thauj mus los tsis tu ncua yam tsis muaj kev sib hloov qhov tawv nqaij thaum lub tsheb ciav hlau hla; qhov sib koom ua ke ntawm cov ntses tiaj tus tsuas yog 70% -80% ntawm cov khoom siv hauv paus, uas yog ib qho yooj yim los ua ib qho kev sib tw nruj thiab ua rau muaj kev cuam tshuam ntawm lub log-rail. Cov neeg kho tshuab tom quab yuam ntawm tus hniav profile meshing qauv ua rau kom cov khoom sib kis tau zoo los ntawm 20% -30%, ua rau kev ntxhov siab ntau dua, thiab tsis txhob muaj kev ntxhov siab ntawm kev sib koom ua ke; flat fishplates tsuas yog cia siab rau lub bolt preload kom xa cov loads, thiab kev ntxhov siab yog ib qho yooj yim kom mloog zoo nyob ib ncig ntawm lub qhov ntsia hlau. Nyob rau hauv cov nqe lus ntawm deformation kuj, lub longitudinal deformation tsis kam ntawm cov hniav profile meshing fishplates yog 40% siab dua li ntawm cov ntses tiaj tus, uas muaj peev xwm ua tau zoo inhibit qhov expansion thiab contraction deformation ntawm rail pob qij txha, tshwj xeeb tshaj yog haum rau cov cheeb tsam nrog drastic kub hloov.
Dab tsi yog qhov kev hloov pauv ntawm cov hniav profile meshing fishplates rau cov qauv tsheb sib txawv?
Cov kev hloov pauv ntawm cov hniav profile meshing fishplates rau cov qauv tsheb sib txawv yog qhov tseem ceeb rautxuam rail hla -sectional dimension thiab stiffness yam ntxwv. Rau 50kg / m lub teb chaws tus qauv rails nrog tus ntoo khaub lig tsis tshua muaj -sectional txhav, lub adapted fishplate yuav tsum muaj ib tug hniav qhov siab ntawm 3 hli, ib tug hniav pitch ntawm 10mm thiab ib tug hniav kaum sab xis ntawm 60℃kom tsis txhob muaj kev puas tsuaj rau txoj kev tsheb ciav hlau kev sib cuag nto vim overly sib sib zog nqus meshing hniav. Rau 60kg / m lub teb chaws tus qauv hnyav -haul rails, nws yog ib qho tsim nyog los txhim kho lub peev xwm ntawm cov hniav meshing; cov hniav qhov siab yog 4 hli, cov hniav pitch yog 12 hli, thiab siab - lub zog alloy steel yog siv los xyuas kom meej tias qhov sib koom ua ke sib tw nrog hnyav- tsheb ciav hlau. Rau EU EN54E1 txawv teb chaws tus qauv rails, uas nws tus ntoo khaub lig-sectional profile yog txawv los ntawm lub teb chaws tus qauv ntsia, nws yog tsim nyog los kho cov hniav tshwj xeeb profiles nrog lub kaum sab xis ntawm tus hniav hloov mus rau 55℃thiab ib tug hniav pitch ntawm 14mm kom haum rau qhov sib cuag nto profile ntawm txawv teb chaws tus qauv rails. Rau North American AAR136RE rails, vim yog lub qag loj thauj khoom, yuav tsum muaj ob npaug - hniav profile meshing tsim los txhim kho qhov cuam tshuam ntawm kev sib koom ua ke.
Dab tsi yog cov ntsiab lus tseem ceeb ntawm kev siv tshuab ntawm cov hniav profile meshing fishplates?
Cov ntsiab lus thev naus laus zis tseem ceeb ntawm cov hniav profile meshing fishplates yog concentrated hauv ob qhov txuas:hniav profile ua kom raug thiab kho nto, uas ncaj qha cuam tshuam cov nyhuv meshing. Cov hniav profile yog ua tiav los ntawm CNC milling, thiab qhov tseeb ntawm milling cutter yuav tsum ncav cuag ± 0.02mm los xyuas kom meej tias qhov sib txawv ntawm cov hniav lub kaum sab xis, cov hniav qhov siab thiab cov hniav pitch yog tswj nyob rau hauv ± 0.1 hli, zam tsis txaus meshing vim hniav profile deviation. Tom qab milling, tus hniav nto yuav tsum tau quenched ntawm ib tug kub ntawm 820{10}}850℃thiab tempered ntawm 350-400 degree, thiaj li hais tias cov hniav hardness ncav cuag HRC55-60 los txhim kho cov hnav tsis kam ntawm cov hniav nto. Kev kho deg siv phosphating, thiab lub thickness ntawm cov phosphating zaj duab xis yog tswj ntawm 5-8μm los txhim kho cov kev sib txhuam quab yuam ntawm cov hniav nto thiab tiv thaiv plam ntawm lub meshing nto. Tom qab ua tiav, ib qho kev sim meshing yuav tsum tau ua los sim-nruab lub phaj nrog lub tsheb ciav hlau, thiab qhov chaw sib cuag ntawm qhov chaw meshing yuav tsum siab dua los yog sib npaug li 90% kom ntseeg tau tias qhov sib npaug ntawm cov khoom sib kis.
Dab tsi yog qhov ntawm - qhov chaw teeb tsa kev ceev faj rau cov hniav profile meshing fishplates?
Qhov ntawm -qhov chaw teeb tsa ntawm cov hniav profile meshing fishplates yuav tsum tau tsom raumeshing nto tu thiab ntsia liaj qhov rooj zawm ib ntuskom ntseeg tau tias kev sib koom ua ke nruj. Ua ntej kev teeb tsa, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo ntxuav cov xeb, cov roj stains thiab cov khib nyiab ntawm qhov chaw sib cuag ntawm cov ntses thiab cov tsheb ciav hlau; nws tuaj yeem polished nrog cov hlau txhuam hlau thiab tom qab ntawd purged nrog lub siab - rab phom cua kom ntseeg tau tias tsis muaj teeb meem txawv teb chaws ntawm qhov chaw meshing thiab tsis txhob cuam tshuam cov nyhuv meshing. Bolt zawm yuav tsum ua raws li covsymmetrical zawm ib ntus los ntawm nruab nrab mus rau ob qho kawg: Ua ntej zawm lub 2 nruab nrab bolts, tom qab ntawd ceev cov bolts ntawm ob qho kawg nyob rau hauv lem kom paub meej tias cov ntses thiab cov tsheb ciav hlau sib npaug. Lub torque nruj yuav tsum tau kho raws li tus qauv rail; Lub zog torque rau 50kg / m rails yog 250-300N·m, thiab 60kg / m rails yog 350-400N·m. Ntau lub zog torque yooj yim ua rau cov hniav puas tsuaj, thaum tsis txaus torque ua rau xoob meshing. Tom qab kev teeb tsa, qhov sib koom ua ke yuav tsum tau sim nrog lub zog khov kho kom ntseeg tau tias qhov sib txawv ntawm qhov sib koom ua ke dynamic nruj thiab cov khoom siv hauv paus yog tsawg dua lossis sib npaug li 5%. Tsis tas li ntawd, kev hnav ntawm qhov chaw meshing yuav tsum tau tshuaj xyuas tsis tu ncua nrog kev tshuaj xyuas lub voj voog ntawm 6 lub hlis, thiab cov phaj ntses yuav tsum tau hloov raws sij hawm yog tias cov hniav hnav hnyav heev.