Thaum engineers qhia a Rollformers ncej rau cov menyuam Hoobkas, lawv tsis yog tsuas yog xaj ib feem-lawv tab tom tuav lub pob txha rov qab ntawm lub voj voog hlau ua kab siab. Peb tau pom ntau qhov kev txwv tsis pub dhau los ntawm cov ncej chais uas warped tom qab 3,000 meters ntawm qhov txuas txuas txuas ntxiv, lossis ua tsis tiav qhov kev kuaj xyuas qhov nyuaj ntawm 58 HRC. Tias yog vim li cas precision tsis xaiv ntawm no - nws yog lub hauv paus.
Yog vim li cas Shaft Rollers Fail - Thiab qhov ua tau tiag tiag
Feem ntau cov kev ua tsis tau zoo taug qab mus rau peb lub hauv paus ua rau: cov qauv hlau tsis sib haum, qhov ntev ntawm lub sijhawm ua kom sov, thiab qhov tsis txaus ntawm qhov chaw nyob rau hauv kev sib cuag abrasive. Standard carbon steel rollers tawg nyob rau hauv rov khoov kev nyuaj siab nyob rau hauv rollforming stands. Alloyed castings yam tsis muaj kev tswj cov nplej refinement tsim micro-cracks ze ntawm txoj kev tseem ceeb. Thiab CNC-machined replacements feem ntau hla tom qab machining kev nyuaj siab nyem - yog li lawv distort nyob rau hauv 48 teev ntawm installation.
Peb sim txhua tus ncej ntawm cov menyuam rau torsional rigidity siv ASTM E143 raws tu qauv - thiab tsis lees paub ib chav tsev qhia> 0.012 mm radial runout ntawm 3,000 rpm. Kev lees paub tiag tiag hauv ntiaj teb tseem ceeb tshaj li cov lus qhia tshwj xeeb. Ib North American tube zeb tau tshaj tawm txog 47% lub neej ua haujlwm ntev dua tom qab hloov los ntawm AISI 4140 generic rau peb AMS 5387 cobalt-nickel alloy rollers, txawm tias tus nqi tom kawg yog 2.3 × ntau dua. ROI tau los ntawm kev tshem tawm cov kabmob hloov pauv txhua lub limtiam thiab zam kom tsis txhob muaj lub sijhawm poob qis thaum lub tsheb tso cov yeeb nkab khiav.
Vertical Integration daws qhov Outsourcing tsis tuaj yeem
Koj tsis tuaj yeem outsource metallurgical tswj. Thaum tus neeg siv khoom xa GD&T kos duab rau 215 hli OD × 1,850 hli ntev winch center ncej rau cov menyuam-nrog ± 0.005 hli cylindricity, 62-65 HRC nto hardness, thiab tag nrho traceability rau MTRs - koj xav tau casting, machining, thiab kho cua sov nyob rau hauv ib lub ru tsev. Tsis muaj handoffs. Tsis muaj batch mismatches.
Peb lub tuam txhab ISO-raws li kev tswj hwm tag nrho peb:
- Xuab zeb casting ntawm ductile hlau thiab stainless hlau vaj tse nrog kev tswj cov cua txias kom tiv thaiv nodular graphite pawg
- Multi-axis CNC tig thiab sib tsoo ntawm hardened shafts-siv in-process CMM pov thawj tom qab roughing, semi-tiav, thiab zaum kawg pass
- Los ntawm-hardening + induction nto hardening, validated nrog Rockwell C-scale cross-sections txhua 150 mm raws qhov ntev
Qhov no tshem tawm cov classic "foundry-to-machine-shop gap": qhov twg casting shrinkage tsis suav nrog hauv machining Tshuag nyiaj, los yog qhov chaw kho cua sov distortion invalidates pre-tiav qhov ntev. Peb tau txo qis rework ntawm complex rollers los ntawm 68% txij li thaum siv kaw-loop thermal them nyiaj hauv peb cov kev pab cuam CNC.
Kev xaiv cov khoom tsis yog ib daim ntawv qhia tshwj xeeb
"Stainless steel" txhais tau tias tsis muaj dab tsi tsis muaj ntsiab lus. Rau rollformers khiav galvanized lossis abrasive-coated steel, 304SS hnav hauv qab 800 teev. Peb T800 cobalt-raws li alloy rollers kav ntev tshaj 5,200 teev-vim lawv cov carbide dispersion resists galling, tsis yog corrosion xwb. Thiab AMS 5387 tsis yog "cobalt alloy" nkaus xwb - nws yog qhov sib npaug ntawm Co-Ni-Cr-Mo-W system uas tsim los rau kub hardness tuav siab tshaj 600 ° C, tseem ceeb thaum kev sib txhuam cua sov spikes thaum muaj kev kub ceev.
Peb tau txais cov khoom nyoos tsuas yog los ntawm cov mills tau lees paub rau AMS 2301 thiab EN 10204 3.1, nrog rau tag nrho cov cua sov traceability. Txhua batch tau soj ntsuam spectrographic ua ntej casting - thiab peb khaws cov qauv rau 10 xyoo. Yog tias tus neeg siv khoom qhia txog kev hnav ntxov ntxov, peb rub MTR thawj, piv rau qhov tseeb ntawm qhov microstructure (ntawm SEM / EDS), thiab cais seb qhov teeb meem yog cov khoom siv, txheej txheem, lossis daim ntawv thov tsis sib haum.
Kev ntseeg tau pib ua ntej txiav thawj zaug
Ib tug txhim khu kev qha Rollformers ncej rau cov menyuam Hoobkas tsis tos kom kos duab tuaj txog. Nws koom thaum ntxov - hauv kev tshuaj xyuas tsim. Peb niaj hnub chij teeb meem xws li undersized fillet radii uas mloog zoo rau kev ntxhov siab ntawm cov rooj zaum, los yog tsis yog tus qauv tseem ceeb tolerances uas ua rau fretting hnav. Xyoo tas los, peb tau pab cov Neeg Esxias Qab Teb Hnub Tuaj OEM kho lub xub pwg geometry ntawm 12-sawv rollformer ncej-txo ncov von Mises kev ntxhov siab los ntawm 31% thiab txuas ntxiv lub neej qaug zog tshaj 107 lub voj voog.
Kev xa khoom ruaj khov ua raws li kev npaj ntshiv-tsis yog cov lus cog tseg. Peb ua cov txheej txheem casting pours, tshav kub kho loads, thiab tshuab teem sij hawm nyob rau hauv 4-teev blocks. Prototype xaj nkoj hauv 18 hnub; nruab nrab-ntim khiav tuav rau ± 2-hnub qhov rais. Tsis muaj nqi them sai. Tsis muaj "txoj cai ntawm cov khoom muaj nyob" clauses. Vim tias kev ntseeg siab tsis yog hais txog dab tsi uas muaj tseeb - nws yog hais txog qhov tuaj txog ntawm lub sijhawm, txhua lub sijhawm.
Rau cov engineers qhia txog cov khoom uas tsis ua haujlwm nres cov kab ntau lawm, kev xaiv tsis yog ntawm cov neeg muag khoom - nws yog qhov kev xav thiab cov pov thawj. Precision ncej rollers xav tau kev koom tes nrog kev sib koom tes. Qhov ntawd pib nrog metallurgy koj tuaj yeem txheeb xyuas, cov txheej txheem koj tuaj yeem tshawb xyuas, thiab cov txiaj ntsig koj tuaj yeem ntsuas - tsis yog hauv microns nkaus xwb, tab sis hauv lub sijhawm ua haujlwm.
