Pain Points

Kauv txiav hypotube tau rov khoov dua thiab torsional loading thaum cov txheej txheem kho mob. Cyclic mechanical stress concentrates ntawm kauv kerf hauv paus qhov chaw. Kev qaug zog tawg pib ntawm cov ces kaum tom qab ntau lub voj voog khoov, txuas ntxiv thiab ua rau ib nrab lossis ua tiav lub raj tawg. Qhov kev ua tsis tiav no ua rau muaj kev nyab xeeb loj heev rau cov hlab plawv, paj hlwb thiab plab aortic aneurysm cuam tshuam cov cuab yeej. Nruam-kab laug sab thiab cuam tshuam-kab laug sab hypotube ob leeg ntsib kev nyuaj siab. Ntau pab pawg kev txhim kho tsuas yog ua cov kev ntsuas zoo li qub, tsis quav ntsej txog kev ntsuas kev qaug zog ntawm cyclic-bending. Txawm hais tias static torque, yooj thiab kink-resistance indexes raws li specifications, cov khoom yuav ua tsis tau raws li rov dynamic deformation. Cov neeg tsim qauv feem ntau luam cov qauv ntawm cov qauv uas tsis muaj qhov tsis zoo uas tsis rov ntsuas lub neej qaug zog thaum hloov cov phab ntsa tuab lossis cov khoom siv hlau. Prototype qaug zog-tsis ua hauj lwm cov xwm txheej thawb rov qab kho mob-duab qhov project ncua sij hawm thiab nce R & D nqi rau percutaneous transluminal coronary angioplasty thiab imaging-guided delivery systems.

Txoj Cai Ua Haujlwm

Kauv hlais hypotube (Ø0.20-20 mm sab nraud txoj kab uas hla, me me kerf dav 0.012 hli) yog tsim los ntawm laser engraving kauv slots ntawm hlau tubing substrates xws li 304,316L stainless hlau, 17-7PH, Nitinol thiab L605. Thaum lub hypotube khoov los yog rotates hauv tib neeg anatomical lumen, kev nyuaj siab accumulates ntawm kauv kerf cag ces kaum, uas ua raws li kev ntxhov siab-tsim geometric notches. Nruam muab kauv qauv tsim rov ua thais txoj hauj lwm raws tag nrho cov raj ntev. Kev cuam tshuam-kauv qauv tsim kev hloov pauv kev ntxhov siab ntawm thaj tsam nruab nrab ntawm ntu ntu ntu thiab cov av tsis tau txiav. Nyob rau hauv cyclic dabtsi yog khoov-torsion ua ke load, micro-cracks nucleate ntawm cov high-stress qhov chaw thiab maj propagate. Cov khoom siv hauv paus, kauv suab, kerf geometry, uncut-land dimension, kerf-ntug deg mob sib sau ua ke txiav txim siab qaug zog lub neej. L605 cobalt alloy muaj qhov zoo ntawm kev qaug zog ua haujlwm. Nitinol tuaj yeem ua tiav lub neej ntev kev ua haujlwm raws li kev ua haujlwm laser thiab kev ua tiav ntawm ntug. Ntse laser-txiav npoo ua kom pom kev ntxhov siab; du deburred nto txo ​​qhov cuam tshuam thiab txuas ntxiv kev pabcuam. Cov kws kho tsheb ua kom zoo dua cov qauv kev sib tw, kev xaiv cov khoom siv thiab cov txheej txheem tom qab kho kom txo qis kev qaug zog-ua tsis tiav.

Kev faib khoom siv

Peb cov cuab yeej loj pab txhawb kev qaug zog-kev pheej hmoo tswj rau kauv txiav hypotube. Ua ntej, muab kauv laser txiav tshuab nrog nplua-zog-tswj muaj nuj nqi: tsim nruam thiab cuam tshuam kauv qauv raws li cov neeg siv khoom 2D / 3D kos duab los yog cov qauv, tswj cov kerf geometry kom tsis txhob muaj qhov tob tob tob. Thib ob, ntug-tiav cov khoom siv tom qab ua tiav: electrochemical deburring thiab chemical passivation units tshem tawm cov ntse laser-txiav burrs thiab puag ncig kerf-root fab kom txo qis kev ntxhov siab. Thib peb, cyclic-fatigue-testing benches: simulate soj ntsuam khoov-torsion ua ke cyclic load los ntsuam xyuas hypotube kev pab cuam lub neej. Tag nrho cov txheej txheem tsim khoom ua raws li ISO 13485 thiab ISO 9001: 2015 cov qauv kev kho mob zoo. Raw-material incoming inspection checks alloy metallurgical quality, because the material internal defects will also become fatigue-crack startpoints .

Cov Txheej Txheem Ua Haujlwm Zoo

Txhais cov kev kho mob cyclic-loading tej yam kev mob: kwv yees qhov siab tshaj plaws dabtsi yog khoov vojvoog, rotation amplitude thiab xav tau lub voj voog tus lej thaum lub sij hawm muaj kev cuam tshuam hauv ntiaj teb no. Xaiv lub hauv paus alloy: xaiv L605 yog tias kev ua haujlwm siab ua haujlwm qaug zog yog qhov tseem ceeb tshaj plaws; txais yuav Nitinol rau superelastic ntxiv rau kev qaug zog; xaiv cov qib stainless-steel rau cov xwm txheej dav dav. Tsim spiral-cut geometry: zam dhau qhov me me me me uas ua rau muaj kev ntxhov siab-concentration notches. Rau kev cuam tshuam-kab laug sab tsim, txais yuav hloov pauv hloov pauv hloov pauv sai sai ntawm qhov sib txawv ntawm qhov txiav ntom ntom. Teem kerf dav tsis tsawg tshaj li qhov ruaj khov-txheej txheem txwv 0.012 hli. Xa daim duab lossis qauv rau kev tshuaj xyuas kev tsim khoom. Fabricate trial-cut hypotube samples. Ua qhov kev ntsuam xyuas zoo li qub (torque, pushability, kink resistance), tom qab ntawd ua qhov kev sim ua ke sib xyaw ua ke bending-torsion qaug zog. Yog tias lub neej qaug zog tsis tuaj yeem ua tiav lub hom phiaj, hloov kho cov qauv ntawm cov kauv, hloov cov kev xaiv alloy lossis optimize kerf-ntug xov tiav. Ua kom tiav laser txiav, deburring, kerf-pob zeb rounding thiab passivation tu txheej txheem. Ua raws li qhov ntsuas qhov ntsuas thiab qhov ntsuas qhov zoo. Siv cov thawv ntim khoom lossis cov neeg siv khoom xav tau kev kho mob-qib ntim. Khaws tag nrho ISO-raws li batch traceability cov ntaub ntawv.

Kev paub txog kev lag luam

Cov tswv yim tsim tawm tswv yim qhia tau hais tias feem ntau cov kauv hypotube qaug zog tawg yog los ntawm cov kab kerf-hauv paus ntse, tsis yog cov khoom tsis ua haujlwm ntau. Txawm tias zoo-zoo Nitinol substrate yuav raug kev puas tsuaj thaum ntxov yog tias laser-txiav npoo tseem tsis tiav. Abrupt pattern transition between high‑cut‑density and low‑cut‑density zones of interrupted‑spiral hypotube forms high‑stress hot‑spots and should be avoided. Cov txiaj ntsig kev ua haujlwm zoo li qub tsis tuaj yeem sawv cev rau tus cwj pwm kev qaug zog; ntau tus qauv dhau qhov kev ntsuam xyuas zoo li qub tsis tau poob sai sai hauv kev rov ua dua. Kev ntsuam xyuas kev ntxhov siab yuav tsum suav nrog cov txiaj ntsig kev ntxhov siab, tsis yog qhov zoo tshaj plaws tus qauv du-geometry. Kev ntsuas kev qaug zog yuav tsum ua raws li kev soj ntsuam kev txav mus los tiag tiag es tsis yog siv cov khoom siv tsis raug cai. Kev kos duab kos duab yuav tsum qhia meej meej txog qhov yuav tsum tau ua kerf-ntug rounding es tsis txhob tsuas yog txhais cov txheej txheem sab nrauv thiab lub voj voos.

Cov ntsiab lus

Kev qaug zog tawg ntawm kauv kerf cag sawv cev rau qhov tseem ceeb tsis ua haujlwm rau kev muab kauv txiav hypotube nyob rau hauv cyclic bending-torsion load. Kev ua haujlwm qaug zog nyob ntawm cov khoom siv hlau, kauv geometric layout, kerf-ntug nto zoo thiab qauv-hloov tsim. Comprehensive static plus cyclic-fatigue validation ua ke nrog tsim nyog post-processing edge finishing zoo txo ​​kev pheej hmoo ntawm pob txha. Kev ntsuam xyuas qaug zog yog ib ntu tseem ceeb rau kev txhim kho cov khoom siv spiral-hypotube-based minimally-invasive interventional device.

Outlook & Cov lus qhia

Yav tom ntej R&D kev taw qhia suav nrog kev txhim kho qhov ua kom zoo tshaj qhov qis-stress kauv-slot profile rau micro-hypotube hauv qab Ø0.3 hli. Cov neeg tsim khoom siv yuav tsum ntxiv qhov qaug zog-lub neej Performance index rau hauv cov qauv tsim thaum ntxov. Cov neeg tsim khoom yuav tsum tau hloov kho cov txheej txheem kerf-kho kom zoo rau Nitinol kauv hypotube. Kev tswj xyuas kev ua tau zoo yuav tsum tsim kom muaj cov txheej txheem kev ua haujlwm ntawm cyclic-fatigue-test workflow, kom ua tau raws li kev ruaj ntseg siab dua ntawm cov txheej txheem tom ntej thiab cov cuab yeej siv ntau qhov chaw vascular interventional.