Aluminium extrusion tuag yog cov khoom siv tseem ceeb hauv aluminium profile ntau lawm, thiab lawv lub neej kev pabcuam ncaj qha txiav txim siab cov nqi tsim khoom thiab kev ua haujlwm. Kev tuag lub neej hauv kev lag luam tuaj yeem sib txawv los ntawm ntau dua 10 lub sijhawm, uas cuam tshuam rau kev txiav txim siab ntawm cov txheej txheem tsis ua haujlwm, kev suav ntau ntawm kev pabcuam lub neej, thiab kev siv cov thev naus laus zis ntawm lub neej txuas ntxiv.
1. Core Failure Hom ntawm Extrusion Tuag
Lub hauv paus ntawm kev suav lub neej thiab kev txuas ntxiv yog kom paub meej cov hom kev ua tsis tiav. Kev ua tsis tiav ntawm aluminium extrusion tuag feem ntau muab faib ua plaub pawg:
Hnav tsis ua haujlwm: Kev suav nyiaj ntau dua 70% ntawm tag nrho cov kev ua tsis tiav, nws yog qhov tseem ceeb tshaj plaws tsis ua hauj lwm hom, tshwm sim raws li qhov tsis txaus siab tuag qhov ntev thiab qhov deteriorated profile nto zoo.
Thermal qaug zog tawg: Rov ua dua lub voj voog txias-kub ua rau vaub kib tawg ntawm qhov chaw. Kev ceeb toom ua tsis tiav yog tshwm sim thaum qhov tawg qhov tob tshaj 0.2 hli.
Yas deformation: Permanent deformation tshwm sim ntawm nyias-walled thiab ntse ces kaum txoj hauj lwm ntawm cov tuag nyob rau hauv qhov kub thiab txias siab, uas ua rau unqualified profile qhov ntev.
Cracking tsis ua hauj lwm: Feem ntau tsis ua haujlwm thaum ntxov, feem ntau tshwm sim los ntawm kev ntxhov siab, kev ua haujlwm tsis zoo, thiab kev kho cua sov tsis raug. Cov kab nrib pleb feem ntau yog los ntawm qhov chaw nres nkoj thiab cov ces kaum ntawm cov kabmob tuag.
2. Kev suav cov txheej txheem rau kev tuag
Kev tuag lub neej tsis yog ib qho kev ruaj ntseg nkaus xwb, tab sis ib qho kev ntsuam xyuas ntau yam raws li cov khoom siv, kev ua haujlwm thiab qib kev saib xyuas. Cov txheej txheem suav hauv kev lag luam tseem ceeb tau muab faib ua plaub pawg:
2.1 Empirical Statistical Method ( ntsuas los ntawm Extrusion Cycles)
Txoj kev yooj yim tshaj plaws thiab siv dav hauv kev lag luam, uas yuav siv cov lej ntawm aluminium billet extrusion cycles los ntawm commissioning mus rau scrapping ntawm ib tug tuag set raws li lub ntsuas ntsuas. Kev siv lub neej ntawm ntau hom kev tuag yog raws li hauv qab no:
| Tuag Hom | Pauv Lub Neej Reference | Optimized Life Reference |
|---|---|---|
| Me yooj yooj yim-section tuag | 50,000-100,000 cycles | Ntau tshaj 200,000 cycles |
| Kev tsim kho nruab nrab ntawm qhov profile tuag | 100,000-300,000 cycles | Ntau tshaj 500,000 cycles |
| Complex hollow / nyias-walled tuag | 5,000-20,000 cycles | 50,000-80,000 cycles |
| High-end industrial profile tuag | 30,000-80,000 cycles | 150,000-250,000 cycles |
2.2 Wear Volume Calculation Method
Raws li Archard hnav txoj kev xav, hnav ntim yog proportional rau kev sib cuag siab thiab zawv zawg nrug, thiab inversely proportional rau tuag hardness. Nws yog txoj kev suav nrog kev ua haujlwm siab tshaj plaws.
Cov qauv tseem ceeb: Lub neej tseem tshuav (lub voj voog)=(Qhov siab tshaj plaws hnav tau − Tam sim no hnav) ÷ Qhov nruab nrab hnav ib lub voj voog extrusion
Txoj kev ua haujlwm: Tsis tu ncua ntsuas qhov hloov pauv ntawm cov kabmob tuag, tsim kom muaj qhov hnav tus nqi nkhaus, thiab txiav txim siab hnav tsis ua haujlwm thaum cov kabmob tuag qhov ntev tshaj qhov khoom kam rau ua.
2.3 Fatigue Life Calculation Method
Rau cov tuag dominated los ntawm thermal qaug zog tawg, lub neej kev ntxhov siab yog xam raws li cov khoom siv qaug zog:
Formula: Lub neej qaug zog (lub voj voog)=(Cov khoom siv qaug zog txwv ÷ Kev ntxhov siab ua haujlwm tiag tiag)^m qhov twg m yog cov khoom siv tas li, thiab tus nqi m rau cov cuab yeej ua haujlwm kub steel feem ntau yog 9-12.
Cov xwm txheej uas siv tau: Porthole tuag thiab qhov loj loj tuag raug rau qhov kub thiab txias hloov pauv thiab kev thauj khoom cyclic.
2.4 Cov Qauv Cuam Tshuam Lub Neej Zoo
Ua ke nrog extrusion cycles, hnav raws li txoj cai thiab cov yam ntxwv tsis xws luag, tag nrho lub neej voj voog ntawm kev tuag tau muab faib ua peb theem rau kev tsim khoom thiab kev txiav txim siab txij nkawm:
| Lub neej voj voog theem | Extrusion Cycle Reference | Cov yam ntxwv zoo | Kev tuav tswv yim |
|---|---|---|---|
| Stable theem | 500-50,000 cycles | Cov khoom ruaj khov zoo, tsis tshua muaj hnav | Ua nitriding tu raws li tau teem tseg |
| Hnav acceleration theem | 50,000-200,000 cycles | Pom tseeb tuag bearing hnav, nce seem hloov pauv | Txhim kho qhov tuag zaus, soj ntsuam overhaul |
| Ua tsis tiav theem | Ntau tshaj 200,000 cycles | Kev tawg, deformation, hnyav aluminium adhesion | Ntsuam xyuas cov khoom siv los yog txo qis siv |
3. Tag Nrho-Chain Life Extension Strategies
Kev txhim kho lub neej tuag yog qhov tshwm sim ntawm kev sib koom tes ntau yam hauv kev tsim, khoom siv, txheej txheem, tu thiab tswj. Cov thev naus laus zis ntawm lub neej txuas ntxiv hauv kev lag luam tuaj yeem ua tiav 30% -200% lub neej nce.
3.1 Kev Tsim Kho Kom Zoo Tshaj Plaws: Txo Kev Phem Tsis Ua Haujlwm ntawm Qhov Chaw
Khiav qhov system optimization: Tswj cov khoom ntawm qhov sib txawv ntawm K thiab extrusion ratio λ nyob rau hauv qhov kev pom zoo ntawm 45-200; tswj lub inclination lub kaum sab xis ntawm tus choj hla ntawm 25℃-35℃kom txo cov hlau ntws mus rau qhov chaw tuag thiab kev ntxhov siab.
Txhim kho lub zog zoo: Siv cov ntaub ntawv hloov pauv nrog R Ntau dua lossis sib npaug li 0.5 hli ntawm cov kaum ntse ntse, thiab faib cov phab ntsa tuab sib npaug kom tsis txhob muaj cov yas deformation los ntawm cov phab ntsa nyias hauv zos.
Thermal balance design: Optimize lub vuam chamber ntim los ntawm kev simulation kom txo tau qhov tuag saum npoo kub gradient los ntawm 150℃/ cm mus rau 50℃/ cm, zoo heev txo thermal qaug zog cracking.
3.2 Khoom siv thiab kev kho cua sov: Consolidate Matrix Performance
Kev xaiv khoom: H13 kub ua hauj lwm cuab tam steel yog nyiam rau cov scenarios dav dav; rau kev thauj khoom siab thiab lub neej ntev, LG steel thiab tungsten-molybdenum alloy diversion txuas hniav tuaj yeem siv tau, uas tuaj yeem ua rau lub neej ua haujlwm ntau dua 3 zaug.
Txheej txheem kev kho cua sov (rau H13 steel):
Preheating: Tuav ntawm 600-630℃rau 1.5-2 h, ces kub txog 830-850℃thiab tuav rau 1.5-2 h
quenching: Tuav ntawm 1040-1080℃rau 2-2.5 h, roj quench rau 130℃ces cua txias
Tempering: Ob-theem tempering txheej txheem: tuav ntawm 380-400℃rau 1 h, tom qab ntawd kub txog 580-600℃thiab tuav rau 2 h kom tshem tawm cov kev ntxhov siab.
3.3 Extrusion txheej txheem tswj: Txo kev ua hauj lwm yam cuam tshuam
Kev tswj qhov kub thiab txias: Tswj cov aluminium billet kub ntawm 470-500 degree, thiab tuag bearing kub tsis tshaj 520 degree, kom tsis txhob tuag softening los ntawm overheating.
Load matching: Xaiv qhov tsim nyog extrusion piv thiab extrusion ceev raws li qhov profile seem kom tsis txhob cuam tshuam ntau dhau; txais yuav gradient ceev nce kom txo tau thermal shock thaum lub caij txias tuag pib.
Lubrication technology: Siv nano-graphite high-temperature lubricant, uas tuaj yeem txo qhov kev sib txhuam coefficient mus rau 0.05, txo qis extrusion siab los ntawm 15%, thiab txo tus nqi tuag los ntawm 40%.
3.4 Surface Strengthening: Ncaj nraim txhim kho Wear Resistance Life
Kev kho nitriding: Cov txheej txheem tseem ceeb tshaj plaws hauv kev lag luam. Nrog nitriding kub ntawm 480-520℃thiab tuav lub sij hawm ntawm 6-8 h, lub hardness saum npoo tuaj yeem ncav cuag HV1000. Re-nitriding yog ua txhua txhua 2-3 lub voj voog ntau lawm kom ruaj khov kho qhov tawv tawv. Nco ntsoov tias lub sij hawm rov nitriding yuav tsum tsis txhob ntau dhau kom tsis txhob tev ntawm txheej nitrided.
PVD txheej: High-end dies txais TiAlN txheej, nrog kev sib txhuam coefficient txo mus rau 0.1, thiab tuag lub neej nce los ntawm 50,000 mus rau 180,000 cycles. Rau cov tuag loj xws li tsheb bumper tuag, kev sib xyaw ntawm LG steel + TiAlN txheej ua rau lub neej ntawm 80,000 mus rau 250,000 cycles.
3.5 Kev Saib Xyuas Txhua Hnub thiab Kev Tswj Xyuas Tag Nrho
Off-line specification: Cua txias qeeb tom qab txhua qhov extrusion; Kev ua kom txias sai yog txwv tsis pub. Ua tib zoo ntxuav cov txhuas adhesion ntawm cov kabmob tuag kom tsis txhob muaj cov khoom seem ntawm txhuas ua cov khoom tawv uas ua rau hnav. Tsis txhob siv cov cuab yeej nyuaj los khawb qhov chaw ua haujlwm thaum tu.
Kev tiv thaiv tuag kho: Polish cov kabmob tuag thiab kho micro-cracks ua ntej thaum lub sijhawm hnav kom nrawm kom tsis txhob muaj qhov tsis xws luag.
Tuag cov ntaub ntawv tswj: Sau cov voj voog extrusion, cov txheej txheem tsis raug, qhov tsis xws luag thiab kev saib xyuas cov ntaub ntawv ntawm txhua qhov kev tuag, thiab thim rov qab kho lub voj voog tu thiab cov txheej txheem tsis zoo los ntawm kev khaws cov ntaub ntawv.
3.6 Digital Intelligent Monitoring
Muab cov ntsuas kub thiab vibration sensors rau ntawm qhov tuag bearing thiab mandrel, ua ke nrog lub neej qauv los xam cov seem uas muaj nyob rau ntawm lub sijhawm, paub txog kev hloov pauv ntawm "kev tu ncua sij hawm" mus rau "kev xav tau kev saib xyuas". Thaum tus tuag bearing kub nce sharply los yog qhov kev nyuab siab tshaj qhov txwv, tsis siv neeg ceeb toom yog ua kom tsis txhob muaj kev pheej hmoo tawg ua ntej.
