Thaum fabricating lub log, ntau tus kws tshaj lij tsis yog crane thiab cov neeg siv crane tsis ua kev kho cua sov ntawm crane log lossis muaj cov kev qhia tsis tsim nyog. Yog li ntawd, lub log yog nquag hnav los yog ntxov ntxov hardening txheej spalling, ua rau lub neej luv luv.
Qhov teeb meem no tshwj xeeb tshaj yog nyob rau hauv cov chaw uas nquag siv xws li metallurgical nroj tsuag, docks, seaports, thiab railways, qhov twg lub neej ntawm lub log tsuas yog ib los yog ob xyoos, uas ua rau cov neeg ua hauj lwm zoo heev thiab cov nqi ntawm cov khoom siv tu.
Peb qhov kev paub dhau los qhia tau hais tias los ntawm kev tsim cov txheej txheem tsim nyog rau cov log thiab siv cov txheej txheem kev kho cua sov, peb tuaj yeem txuas ntxiv lub neej ntawm lub log. Cov hauv qab no yog qee qhov kev paub dhau los ntawm peb lub Hoobkas hauv kev kho cua sov ntawm crane log.
Cov Khoom Siv thiab Cov Kev Qhia Tshwj Xeeb rau Log
Peb lub Hoobkas lub log crane siv ob hom khoom: ZG55 thiab ZG50SiMn. Qhov nruab nrab tshuaj muaj pes tsawg leeg ntawm ZG50SiMn yog C0.5%, Si0.6%, thiab Mn1.0%. Rau ZG55 lub log, qhov tshwj xeeb tread hardness yog HB300-350, nrog quench-hardening txheej tob qhov twg hardness ntawm 20 hli los ntawm tread nto yuav tsum siab tshaj los yog sib npaug rau HB260. Rau ZG50SiMn log, qhov tshwj xeeb tread hardness yog HB350-400, nrog ib tug hardness ntawm Greater los yog sib npaug rau HB280 ntawm 20 hli los ntawm tread nto. Muaj ob txoj kev kho cua sov rau lub log: ib qho yog tag nrho clamping phaj quenching txoj kev, thiab lwm yam yog qhov nruab nrab zaus nto quenching txoj kev.
Kev kho cua sov
Kev cuam tshuam ntawm kev kho cua sov ntawm kev ua lub log
Cov txheej txheem kev kho cua sov sib txawv cuam tshuam rau cov txheej txheem ua lub log. Thaum siv qhov nruab nrab zaus induction cua sov, cov txheej txheem ua haujlwm yog raws li hauv qab no: Rough blank → Normalizing + Tempering → Tiav lawm tig lub tread nto thiab sab saum npoo, ntxhib tig lub puab bore (tawm 2.5 hli pub rau txhua sab) → Nruab nrab zaus cua sov nrog dej quenching + Nruab nrab-kub tempering → Tiav lawm tig lub puab bore → Keyway machining → Sib dhos.
Thaum siv tag nrho cov clamping phaj quenching txoj kev, cov txheej txheem hloov mus rau Rough blank → Normalizing + Tempering → Rough tig (tawm 2.5 hli pub rau txhua qhov chaw ua haujlwm) → Rauv cua sov nrog zuag qhia tag nrho clamping phaj quenching + Nruab nrab-kub tempering → Tiav tiav → Keyway Machining → Sib dhos.
Rau loj-scale zus tau tej cov log, nruab nrab-zaus tshav kub kev kho mob tsis tsuas yog txuag lub zog thiab ua lub sij hawm, tab sis kuj ua tiav ntau dua tread hardness. Yog li ntawd, kev kho cua sov nruab nrab yuav tsum tau txhawb nqa hauv cov chaw tsim khoom tshwj xeeb. Ntawm qhov tod tes, tag nrho cov txheej txheem clamping phaj quenching, uas tsis xav tau cov cuab yeej tshwj xeeb, yog tsim rau cov khoom me me lossis cov neeg siv khoom siv. Txawm li cas los xij, lub tread hardness tsuas yog tswj tau nyob rau hauv HB300-350, thiab ua tiav hardness siab dua yog qhov nyuaj, ua rau nws tsis tshua muaj txiaj ntsig.
Xav tias tsis yog cov chaw tsim khoom tshwj xeeb muaj cov khoom ntim me me thiab tsis xav tau tag nrho cov khoom siv nruab nrab zaus induction cua sov, tsuas yog tag nrho cov clamping phaj quenching txheej txheem yog qhia ntawm no.
Zuag qhia tag nrho Clamping phaj quenching txheej txheem rau lub log
Lub zuag qhia tag nrho clamping phaj quenching txheej txheem rau lub log yog raws li nram no: Muab lub log rau hauv lub thawv-hom hluav taws xob rauv thiab cua sov rau 850-870 degree, tswj qhov kub ntawm 2-4 teev. Tom qab tshem lub log los ntawm lub qhov cub, muab tso rau hauv ib lub fixture thiab muab tso rau hauv lub tank dej kom quenching. Thaum kawg, ua kom sov lub log nyob rau hauv lub qhov cub-hom tempering rau 470-490 degree, tswj qhov kub ntawm 4-6 teev, thiab ces cia nws txias. Lub log yuav tsum nyob hauv dej li ntawm 1 feeb ntawm 100 mm inch.
Feem ntau, thaum tshem lub phaj clamping, lub log tseem tseem yuav tsaus liab. Lub hom phiaj ntawm kev siv lub fixture yog los tiv thaiv lub hardening ntawm lub web thiab lub qag qhov. Lub clamping phaj txoj kab uas hla yog sib npaug rau lub nominal txoj kab uas hla ntawm lub log rho tawm 30 hli, thiab nws thickness yog 25 hli. Tom qab ib lub sij hawm ntawm kev siv, qhov chaw ntawm lub phaj clamping nyob rau hauv kev sib cuag nrog lub log yuav tsum tau tig mus tuav ib tug du nto.
Hardness Test ntawm Crane log tom qab kho cua sov
Hardness Test ntawm Crane Log treads
Portable hardness testers feem ntau yog siv los kuaj qhov hardness ntawm crane log treads. Txhawm rau ntsuas qhov tawv tawv, ntsuas ntawm peb qhov sib npaug sib npaug ntawm qhov sib npaug ntawm lub log. Yog tias ob qho ntawm peb lub ntsiab lus ua tau raws li qhov yuav tsum tau ua ntawm hardness, tread hardness yog xam tau.
Qhov tob ntawm Quench-Hardening Layer Testing
Qhov tob ntawm quench-hardening txheej ntawm crane log yog tsuas yog siv los txheeb xyuas cov txheej txheem kev kho cua sov thiab yog qhov kev sim ua kom puas. Ib lub log tiav tuaj yeem txiav qhib nrog nyias, hlais-hom milling cutter. Lub log txiav yuav tsum raug txhawb kom ruaj ntseg, thiab kev ntsuas hardness yuav tsum tau ua ntawm 20 mm los ntawm qhov chaw siv lub hardness tester. Thaum lub sij hawm milling, nws yog ib qho tseem ceeb los tswj kev txiav ceev thiab txias kom tsis txhob overheating qhov chaw txiav.
Cov Qauv rau Hardness thiab Quench-Hardening Layer Depth Test
Hardness thiab quench-hardening txheej qhov tob kuaj ntawm crane log yuav tsum tau ua raws li lub teb chaws tus qauv JB / T 6392-2008 "Crane Wheels" log nrog siab dua los yog qis dua hardness yuav raug xaiv.
Mechanical Properties Ntawm Log Tom Qab Kev Kho Mob Kub Kub
Ua kom muaj zog
Thaum tshav kub kub-kho lub log muaj zog dua thiab toughness, cia lawv tiv taus ntau dua loads thiab dabtsi yog khoov stresses. Tsis tas li ntawd, kev kho cua sov tuaj yeem tsim cov txheej txheem nyuaj ntawm lub log, muab cov txiaj ntsig tiv thaiv.
Txhim kho hnav tsis kam
Kev kho cua sov ua kom lub ntsej muag hardness ntawm lub log, yog li ua kom nws hnav tsis kam thiab txo tus nqi hnav. Thaum tshav kub kub kho lub log yuav tsum tsis tshua muaj txij nkawm thaum siv, uas yuav pab txuag tau tus nqi.
Txhim kho Fatigue Resistance
Kev thauj khoom rov qab tuaj yeem ua rau qaug zog tawg hauv lub log, cuam tshuam rau lawv txoj sia. Kev kho cua sov txhim kho cov qauv siv lead ua thiab cov qauv micro ntawm cov khoom siv, yog li txhim kho qhov qaug zog ntawm lub log thiab txuas ntxiv lawv lub neej kev pab cuam.
Hauv cov ntsiab lus, kev kho cua sov yog txheej txheem tseem ceeb rau kev txhim kho lub zog, hnav tsis kam, thiab qaug zog ntawm lub log. Hauv kev tsim cov crane log, kev kho cua sov ua lub luag haujlwm tseem ceeb hauv kev txhim kho lub log kev ua tau zoo thiab ua kom muaj kev nyab xeeb ntawm cov cranes.Peb tuaj yeem muab ntau hom kev kho cua sov crane log thiab muab kev cai tsis yog qauv tsim raws li koj cov kev xav tau tshwj xeeb. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb!
