Yuav ua li cas kom tsis txhob machining deformation ntawm hlau 3D luam tawm qhov chaw?

Ib, Tsim theem: Topology optimization siv kev nyuaj siab simulation
1. Simulating qhov kev faib tawm ntawm kev ntxhov siab thiab rov tsim kho cov qauv
Ib lub tuam txhab uas ua turbine hniav rau kev lag luam aerospace siv Simufact Additive software los khiav lub thermal mechanical coupling simulation. Lawv pom tias cov qauv tsim qauv qhia kev ntxhov siab nyob rau hauv cov hniav hauv paus kev hloov chaw. Hloov lub kaum sab xis hloov mus rau lub kaum sab xis hloov pauv nrog lub vojvoog 5 hli thiab sau cov cheeb tsam uas tsis muaj kev ntxhov siab nrog cov qauv lattice txo qis qhov kev ntxhov siab ntawm 420MPa rau 280MPa thiab luam ntawv deformation los ntawm 62%. Qhov xwm txheej no qhia tau hais tias topology optimization raws li kev simulation tuaj yeem nrhiav tau siab - qhov kev ntxhov siab ua ntej thiab ua kom muaj kev ntxhov siab los ntawm kev hloov cov qauv.
2. Ntse tsim cov qauv uas txhawb nqa
Cov qauv siv hluav taws xob yog siv rau hauv cov qauv kev txhawb nqa ib txwm muaj, uas tuaj yeem ua rau cua sov tuaj yeem tsim hauv ib cheeb tsam. Manga Technology's VoxelDance Engineering software siv scanning deformation them nyiaj thev naus laus zis los tsim cov qauv kev txhawb nqa uas haum rau cov duab ntawm qhov chaw. Txoj kev no txhim kho qhov ntom ntom ntawm kev txhawb nqa kev faib tawm thaum luam ntawv cov khoom sib koom tes hauv lub tuam txhab kho mob. Nws txiav qhov tob ntawm qhov kev puas tsuaj los ntawm kev tshem tawm cov kev txhawb nqa tom qab sintering los ntawm 0.3mm mus rau 0.05mm thiab txiav cov nyiaj pab txhawb nqa los ntawm 30%.
3. Tsim tus qauv rau ua ntej -deformation them
Rau aviation hydraulic valve lub cev uas yuav tsum tau muaj tseeb nyob rau hauv ± 0.02 hli, Platinum Technology tuam txhab siv ib tug kaw - txheej txheem voj hu ua "printing scanning them." Hauv cov txheej txheem no, tus qauv qub yog luam tawm nrog 316L stainless hlau, thiab ATOS Triple Scan 3D scanner tau txais cov ntaub ntawv deformation tiag. Cov ntaub ntawv no yog tom qab ntawd siv los ua qhov rov qab ua ntej - qauv deformation hauv Magics software. Tom qab ob txoj kev kho, qhov tseem ceeb ntawm qhov kev ua siab ntev mus los ntawm ± 0.15mm mus rau ± 0.03mm, uas yog cov qauv aviation xav tau.
2, Cov txheej txheem theem: kev sib koom ua ke ntawm ntau qhov kev txwv
1. Hloov cov chaw ntawm lub laser ntawm ya
Cov cuab yeej Huashu High Tech FS200M dynamically hloov lub laser lub zog thiab scanning ceev thaum luam ntawv lub combustion chamber ntawm ib tug tej lub cav los ntawm kev ua kom lub qhov muag ntawm qhov kub thiab txias ntawm lub pas dej ua ke nyob rau hauv lub sij hawm. Hauv 3 hli phab ntsa thickness cheeb tsam, 800W / 1200mm / s parameter tau siv, thiab nyob rau hauv 0.8mm phab ntsa thickness cheeb tsam, 600W / 800mm / s parameter tau siv. Qhov kev faib tawm qhov kev hloov pauv no txo ​​qis ntawm cov khoom siv hluav taws xob hauv nyias- cov ntu phab ntsa los ntawm 40% thiab cov kev ntxhov siab seem los ntawm 55%. Nws kuj kho qhov teeb meem sintering deformation hauv 0.5mm cantilever qauv.
2. Txhim kho cov txheej txheem ntawm kev tso hmoov
EOS M 400-4 cov cuab yeej siv cov khoom siv hloov pauv hmoov sib kis los cuam tshuam nrog cov nyhuv ntawm cov hmoov txheej tuab ntawm deformation. Nws khaws cov txheej tuab ntawm 40 μ m hauv cheeb tsam kev txhawb nqa thiab hloov nws dynamically mus rau 25 μ m nyob rau hauv qhov dawb - daim ntawv cheeb tsam. Cov ntaub ntawv ntsuam xyuas pom tau tias txoj hauv kev no txiav cov interlayer misalignment ntawm nyias-walled qhov chaw ntawm 0.12mm mus rau 0.03mm thiab nce qhov roughness Ra tus nqi ntawm 12.5 μ m rau 6.3 μ m.
3. Kev tswj cov huab cua ntawm inert gas
Platinum BLT-S800 ntaus ntawv khaws cov huab cua thiab cov av noo qis heev (tsawg dua 10% RH thiab 50ppm) thaum luam ntawv titanium alloy orthopedic implants. Qhov no yog ua tiav siv lub kaw - voj tswj qhov system. Cov kev sim uas sib piv cov chaw sib txawv tau pom tias qhov no tuaj yeem txo cov hmoov oxidation ntawm 0.8% mus rau 0.15%. Qhov no daws qhov teeb meem ntawm oxide zaj duab xis ua rau nws nyuaj rau cov khaubncaws sab nraud povtseg thiab ua rau qhov chaw 18% muaj zog.
3, Kev tshaj tawm - theem ua haujlwm yog thaum kho qhov tsis xws luag thiab kev ua haujlwm tau zoo dua.
1. Kub isostatic nias (HIP) densification kho
Ib qho kev lag luam aviation cav ua haujlwm ua haujlwm QIH-15L kub isostatic pressing khoom los ua haujlwm ntawm Inconel 718 high-temperature alloy qhov chaw. Khaws cov khoom ntawm 1200℃/ 150MPa rau 4 teev ua rau lawv denser (los ntawm 99.2% mus rau 99.98%) thiab tsawg ntxeem tau (los ntawm 0.3% mus rau 0.002%). Cov txheej txheem ua haujlwm 'kev qaug zog lub neej yog peb zaug ntev dua, thiab microcrack flaws uas tsim thaum lub sij hawm sintering yog tag nrho.
2. Cov txheej txheem ntawm kev kho cua sov gradient
Rau 316L stainless hlau hydraulic valve lub cev, ua peb - cov txheej txheem kev kho cua sov: kev ntxhov siab annealing ntawm 550℃rau 2 teev, kev kho mob ntawm 1050℃rau 1 teev, thiab kev laus kho ntawm 480℃rau 4 teev. Cov txheej txheem no ua rau qhov nyuaj, mus los ntawm 180HV mus rau 280HV, thiab txo qis cov kev ntxhov siab, mus ntawm 320MPa mus rau 80MPa. Qhov no kho qhov teeb meem ntawm qhov seem rov qab tom qab machining.
3. Tshuab rau tshem tawm kev txhawb nqa ntse
Ntawm DMG MORI LASERTEC 65 3D cov cuab yeej, tsib axis linkage machining center yog siv los txhawb kev tshem tawm: lub txiav quab yuam raug saib xyuas nyob rau lub sijhawm los ntawm Lub Zog Tswjhwm, thiab tus nqi pub yog hloov kho. Kev ntsuam xyuas tau pom tias cov thev naus laus zis no ua rau nws yooj yim dua 40% tshem tawm kev txhawb nqa, thiab nws ua kom qhov tob ntawm qhov chaw puas nyob rau hauv 0.02mm, uas yog qhov chaw aviation yuav tsum nyob twj ywm.