Cov cuab yeej kho mob puas tuaj yeem tsim tau siv hlau 3D luam ntawv?

Ib, Saib ntawm cov txiaj ntsig tseem ceeb ntawm hlau 3D tshuab luam ntawv
1. Geometric degrees ntawm kev ywj pheej thiab tsim rau conformal txias
Drilling cov txheej txheem txwv cov cua txias hauv cov pwm ib txwm siv, yog li lawv feem ntau siv cov kab los yog cov qauv ntoo khaub lig yooj yim. Qhov no ua rau qhov txias txias tsis zoo thiab qhov kub tsis sib xws. Selective Laser Melting (SLM) thiab Electron Beam Melting (EBM) yog ob lub thev naus laus zis uas ua rau nws muaj peev xwm tsim cov cua txias raws li kev siv hlau 3D luam ntawv. Piv txwv li, nyob rau hauv orthopedic implants, siv simulation software optimize cov dej txoj kev kom qhov kev ncua deb ntawm cov dej txias channel thiab cov pwm kab noj hniav nto nyob rau hauv 2 hli yuav txuag tau lub txhaj molding voj voog los ntawm 35% thiab txiav cov khoom warpage los ntawm 60%. Qhov kev tsim no yog qhov tseem ceeb heev rau kev ua lub plawv stent pwm vim tias micro-theem precision txias channel ua kom cov khoom stent shrinks tusyees thaum lub sij hawm molding txheej txheem, uas tiv thaiv cov kab nrib pleb los ntawm kev tsim vim kev ntxhov siab concentration.
2. Guarantee ntawm biocompatibility thiab cov khoom ua tau zoo
Pwm rau cov khoom siv kho mob yuav tsum ua tau raws li cov txheej txheem biocompatibility siab heev. Hlau 3D luam ntawv tso cai rau kev molding ncaj qha ntawm cov ntaub ntawv xws li titanium alloy (Ti6Al4V), cobalt chromium alloy (CoCrMo), thiab kev kho mob stainless hlau (316L), tag nrho cov uas tau ntawv pov thawj raws li biocompatible los ntawm ISO 10993. Piv txwv li, Ti6Al4V titanium alloy feem ntau yog siv los ua pwm 'corde rau kev sib koom ua ke zoo txij li thaum siv cov khoom sib koom ua ke. nrog tib neeg pob txha. Koj tuaj yeem tswj hwm qhov loj ntawm cov khoom ntawm 10 thiab 50 μm los ntawm kev hloov cov chaw luam ntawv, xws li lub zog laser thiab scanning ceev. Qhov no ua rau muaj kev sib npaug ntawm cov neeg kho tshuab zoo thiab kev ua haujlwm lom neeg.
3. Ib qho qauv tsim uas yog ob qho tib si hnav thiab ua haujlwm zoo
Hlau 3D luam ntawv tso cai rau kev tsim qauv hnyav xws li cov qauv lattice thiab cov qauv lattice. Qhov no txo ​​qis ntawm kev siv cov khoom siv thaum tseem ua kom cov pwm muaj zog. Piv txwv li, Platinum lub hollow lattice cua txias channel rau aircraft cav hniav pwm txiav qhov hnyav los ntawm 40% thiab ua kom txias txias rau 2.3 npaug ntawm cov qauv tsim. Qhov kev tsim no yog siv nyob rau hauv kev kho mob txoj hauj lwm rau qhov kawg effector pwm ntawm phais neeg hlau. Nws txo tus naj npawb ntawm cov kauj ruam uas yuav tsum tau muab cov cuab yeej siv ua ke thiab ua rau nws txhim khu kev qha los ntawm kev ntxiv cov khoom siv xws li thermocouple mounting qhov thiab cov kua dej.
2, Cov ntaub ntawv siv ntau thiab cov ntaub ntawv tshawb fawb
1. Ua pwm rau orthopedic implants
Case: Pwm rau 3D- luam tawm hip cog
Aikang Medical's 3D ACT dag hip sib koom ua ke siv bimetallic 3D tshuab luam ntawv los ua cov femoral qia pwm. Cov txheej txheem pob txha yog ua los ntawm Ti6Al4V titanium alloy, uas muaj cov qauv microporous uas txhawb cov pob txha ntawm tes; hnav- txheej tiv thaiv yog ua los ntawm CoCrMo cobalt chromium alloy, uas muaj qhov roughness ntawm Ra<0.2 μ m, which reduces friction and wear with the polyethylene lining. The transition layer is formed of Ti Co gradient alloy, and powder mixing technology is used to make the composition gradient so that stress doesn't build up. This mould makes the product last for more than 15 years, which is three times longer than usual methods.
2. Ua pwm rau cov hlab plawv stents
Case: Mould rau micro loj vascular stent
Ua kom vascular stents, qhov tseeb ntawm cov txheej txheem tsim khoom yuav tsum nyob nruab nrab ntawm 10 thiab 50 μm. Qhov no yog ib qho nyuaj ua nrog cov machining. Pab Pawg Huazhong University of Science thiab Technology ua haujlwm SLM thev naus laus zis los ua Nitinol stent pwm. Lub stent hlau txoj kab uas hla tsis raug yog tsawg dua 2 μm los ntawm kev tswj cov yam xws li txheej thickness (20 μm) thiab laser zog (150W). Nyob rau hauv tus qauv npua coronary artery, lub stent ua nrog cov pwm no qhia tau hais tias kev txhawb nqa zoo thiab hloov tau yooj yim, nrog rau 40% qis qis dua li cov khoom siv.
3. Ua cov pwm rau cov khoom siv kho mob
Case: Hlau daim phiaj pwm rau CT scanner los tiv thaiv- lim lim
Dunlee's ntshiab tungsten 3D luam tawm lim daim phiaj pwm siv EBM thev naus laus zis los ua cov duab zoo sib xws hauv ib qho mus. Piv nrog rau cov txheej txheem milling, cov pwm no lim kab sib chaws tuaj yeem txhawb lub teeb liab - rau - suab nrov piv ntawm lub khob hliav qab CT los ntawm 1.7 npaug thiab txiav cov khoom pov tseg los ntawm 85%. Tsis tas li ntawd, ntshiab tungsten lub siab ceev (19.3 g / cm³) tiv thaiv X-rays, uas ua rau cov duab zoo.
3, Cov teeb meem thiab kev daws teeb meem hauv tshuab
1. Qhov zoo ntawm qhov chaw thiab cov txheej txheem tom qab kev kho mob
Qhov saum npoo roughness ntawm hlau 3D luam ntawv pwm yog feem ntau ntawm Ra6 thiab Ra10 μm. Tom qab kev kho mob, suav nrog electrolytic polishing thiab sandblasting, nws yuav tsum tau coj mus rau Ra0.8 μm lossis qis dua. Lub koom haum Beijing Institute of Aeronautical Manufacturing's chemical mechanical polishing (CMP) txoj kev tuaj yeem ua rau saum npoo ntawm Ti6Al4V pwm smoother, coj lawv mus rau Ra0.2 μ m, uas yog tus qauv rau cov khoom siv kho mob.
2. Tswj cov kev ntxhov siab seem
Thaum lub sij hawm luam ntawv, cua sov thiab cua txias sai sai tuaj yeem ua rau muaj kev ntxhov siab ntxiv los tsim thiab pwm hloov pauv. Cov lus teb yog:
Cov txheej txheem ua kom zoo: Siv cov txheej txheem scanning kob, ib txheej yog muab faib ua ob peb ntu uas yuav raug luam tawm ntawm ib zaug. Qhov no yuav pab kom nthuav tawm cov thermal stress tusyees.
Kev kho cua sov: Txhawm rau tshem tawm ntau dua 80% ntawm qhov seem seem, ua kom sov pwm rau 650 degrees Celsius thiab cia nws txias.
Kev saib xyuas online: Siv cov duab hluav taws xob infrared los saib qhov ntsuas kub hauv lub sijhawm thiab hloov lub zog ntawm laser raws li xav tau.
3. Tus nqi thiab tus nqi ntawm cov khoom siv
Kev kho mob-qib titanium alloy hmoov raug nqi 2000-5000 yuan ib kilogramme, uas yog 5-10 npaug ntau dua li cov hlau pwm. Cov lus teb yog:
Cov hmoov rov ua dua tshiab: Los ntawm kev tshuaj ntsuam thiab kev kho oxidation, tus nqi ntawm cov hmoov tsis zoo rov qab mus txog 95%.
Topology optimization tsim: Txo tus nqi ib chav tsev thiab txo cov khoom siv los ntawm 30% mus rau 50%.
Loj - nplai ntau lawm: Tus nqi ib thooj tau los ze zog rau cov txheej txheem ib txwm ua tsaug rau cov cuab yeej siv tau zoo dua qub (piv txwv li, Huashu High tech FS1211M cov cuab yeej tuaj yeem luam tawm ntawm qhov nrawm ntawm 50cm ³ / h).