Thaum koj lub tshuab hydraulic ua tsis tau raws li 350-bar siab, lossis cobalt-alloy twj nozzle tawg tom qab 47 teev ua haujlwm tas li, qhov teeb meem tsis tshua muaj nyob hauv kev tsim. Nws nyob hauv precision qhov chaw machining Hoobkas uas txhais cov duab kos rau hauv lub cev qhov tseeb - qhov twg microns cais kev ua haujlwm los ntawm kev ua tsis tiav.
Peb tau pom nws ua ntej: North American OEM tsis lees txais peb qhov sib law liag ntawm AMS 5387 piston twj tso kua mis - tsis yog vim lawv saib tsis ncaj ncees lawm, tab sis vim CMM cov ntaub ntawv pom 0.012 hli axial runout ntawm lub rooj zaum bearing. Qhov ntawd yog tsawg tshaj li ib nrab ntawm cov tuab ntawm tib neeg cov plaub hau. Txawm li cas los xij, qhov kev sib txawv no ua rau muaj kev foob ntxov ntxov thiab rov qab los. Qhov kev kho tsis yog kho dua tshiab - nws tau nruj cov txheej txheem tswj ntawm qhov chaw: cov khoom siv traceability, thermal stabilization ua ntej zaum kawg machining, thiab cov cuab yeej siv tiag tiag hnav cov nyiaj them rau 5-axis mills. Qhov ntawd tsis yog kev tsim khoom. Qhov ntawd yog qhov kev qhuab ntuas.
Vim li cas alloy complexity xav tau ntsug kev koom ua ke - tsis yog CNC muaj peev xwm
Cobalt-nickel alloys zoo li T800 thiab AMS 5387 tsis coj zoo li 6061 txhuas. Lawv ua haujlwm hnyav hnyav, ua cua sov tsis zoo, thiab xav tau cov kev txiav tshwj xeeb - nqes mus rau spindle orientation thiab coolant xa lub kaum sab xis. Lub khw uas tsuas yog ua CNC machining feem ntau outsources casting, ces tawm tsam nrog residual stress distortion thaum lub sij hawm tiav txiav. Peb tau ntsuas txog li 0.08 hli warpage nyob rau hauv cov xuab zeb-cam khwb cia CoCr vaj tse tom qab rough machining ib leeg - txaus los khawb ib tug $2,400 ib feem.
Kev daws tsis yog cov tshuab nrawm dua. Nws yog tswj interfaces ntawm cov txheej txheem:
- Casting-machining handoff: Cov sijhawm kho cua sov tau kaw rau cov lej ntau-tsis yog hnub tim
- Machining-finishing continuity: Nto kev ncaj ncees khaws cia los ntawm kev zam kev tuav lwm yam; tsis muaj kev kho dua tshiab ntawm kev tig, milling, thiab sib tsoo
- Cov khoom siv-rau-qhov loj me: Txhua daim ntawv nyoos yog nqa tag nrho cov ntawv xeem xeem (ASTM E112 grain loj, ASTM E1268 suav nrog kev ntsuas) khi rau qhov kawg ID
Qhov no yog vim li cas "precision qhov chaw machining Hoobkas" txhais tau tias qee yam txawv thaum casting, machining, thiab metallurgical validation tshwm sim nyob rau hauv ib lub ru tsev - thiab ib tug zoo system.
Qhov twg GD&T nres ua theoretical-thiab pib dictating workflow
Cov neeg muas zaub xa peb cov duab kos nrog txoj hauj lwm tolerances ntawm ± 0.005 hli ntawm Ø12 hli bores, tsis hais seb lub feature zaum nyob rau hauv ib tug 300-mm steel casting los yog ib tug 45-mm cobalt plug. Qee lub khw kho GD&T raws li daim ntawv txheeb xyuas. Peb kho nws raws li daim ntawv qhia ntau lawm.
Piv txwv li: tsis yog tus qauv winch center ncej cov menyuam nrog peb coaxial bores, txhua tus xav tau ib txhij txoj hauj lwm tswj txheeb ze rau lub dav hlau datum machined 200 mm deb. Txuj kev xyaum? Tshuab lub datum ua ntej, tom qab ntawd tig qhov chaw thiab rov tsim kev sib raug zoo. Tab sis thermal drift ntawm kev teeb tsa qhia txog kev ua yuam kev. Peb cov lus teb: ib zaug teeb tsa 5-axis machining siv cov khoom siv lub tshuab nqus tsev uas tuav ob qho tib si datum nto thiab rotating nta - txheeb xyuas nrog laser tracker ua ntej kev txiav pib.
Qhov ntawd tsis yog over-engineering. Nws yog tshem tawm qhov loj tshaj qhov kev hloov pauv: tib neeg txhais lus ntawm kev kam rau siab.
Traceability koj tuaj yeem tshawb xyuas - tsis yog thov xwb
"Full traceability" tshwm sim ntawm txhua tus neeg muag khoom lub vev xaib. Dab tsi cais kev ntseeg tau los ntawm kev lag luam luam?
Hauv peb qhov chaw ua raws ISO, traceability pib nrog lub cav yaj-tsis yog daim ntawv xaj khoom. Txhua cobalt alloy batch nqa:
- Ib qho hluav taws xob tshwj xeeb ID txuas rau tshuaj ntsuam xyuas (ICP-OES txheeb xyuas)
- Grain qauv duab los ntawm longitudinal seem
- Hardness daim ntawv qhia hla lub billet cross-section (tsis yog qhov chaw nyeem ntawv)
- Kev sib raug zoo ntawm cov ntaub ntawv kho cua sov lub voj voog thiab qhov kawg microhardness ntawm thaj chaw tseem ceeb
Thaum lub tuam txhab European twj tso kua mis thov cov khoom siv tag nrho rau ib qho AMS 5387 lub cev lub cev, peb tau xa 17 nplooj ntawv-xws li cov ntaub ntawv thermal keeb kwm, tensile test curves, thiab CMM soj ntsuam cov ntaub ntawv hnub tim rau teev. Tsis muaj reconstruction. Tsis muaj kev kwv yees. Tsuas yog cov ntaub ntawv khaws tseg, khaws cia hauv qab 90 feeb.
Cov ntaub ntawv qib ntawd tsis tshwm sim yam tsis muaj cov txheej txheem ua haujlwm digital-thiab tsis ua txhua yam raws li lub luag haujlwm tseem ceeb, txawm tias nyob hauv cov qauv ua haujlwm.
Lub ntiaj teb tiag tiag tsis yog hais txog kev ntaus xoom - nws yog hais txog kev tswj kev sib txawv
Qhov tseeb tseeb tsis txhais los ntawm ib qho kev ntsuas. Nws yog qhov sib txawv ntawm qhov sib txawv ntawm 500 qhov chaw, thoob plaws peb lub lis piam tsim khoom, hla ob tus neeg ua haujlwm sib txawv. Peb taug qab CpK qhov tseem ceeb - tsis yog qhov tshwm sim dhau / tsis ua haujlwm - rau txhua qhov tseem ceeb ntawm txhua qhov ua siab ntev. Peb lub hom phiaj? CpK ≥ 1.67 ntawm tag nrho cov nta uas ua haujlwm tau zoo nyob ntawm geometric fidelity.
Qhov kev qhuab qhia no cia peb txhawb cov neeg siv khoom uas xav tau ntau tshaj qhov - lawv xav tau kev kwv yees. Txawm hais tias nws tuav ± 0.008 hli ntawm lub rooj zaum siab valve uas kaw ntawm 420 bar, los yog tswj qhov chaw roughness Ra ≤ 0.4 µm ntawm lub caj pas cobalt uas tswj cov abrasive slurry ntws, lub hom phiaj tseem zoo ib yam: tshem tawm qhov tsis paub tseeb ua ntej nws mus txog qhov chaw.
Yog tias koj daim ntawv thov xav tau rov ua dua qhov kev ruaj ntseg hauv cov hlau ua haujlwm siab-thiab yog tias "kaw txaus" pheej hmoo poob qis, teeb meem kev nyab xeeb, lossis kev lav phib xaub - yog li txoj cai precision qhov chaw machining Hoobkas tsis yog ib qho nrog cov tshuab tshiab tshaj plaws. Nws yog ib qho uas ntsuas nws tus kheej cov kev txwv, cov ntaub ntawv txhua qhov sib txawv, thiab kho kev zam txim raws li kev txwv nyob - tsis yog tus lej zoo li qub ntawm daim ntawv luam.
