Skived Hypotube Manufacturing: Overcoming Torque Poob hauv Complex Anatomies

Taw Qhia: Txheeb xyuas Cov Ntsiab Lus Mob

Kev ua tau zoo ntawm lub catheter nyob rau hauv txoj kev anatomical complex, xws li cerebral vasculature los yog peripheral hlab ntsha, yog heev nyob ntawm seb nws muaj peev xwm mus kis torque los ntawm lub proximal kawg mus rau lub distal tip. Ib hom kev ua tsis tiav hauv cov txheej txheem cuam tshuam yog "torque nplawm" lossis "cua-nce," qhov twg lub catheter ncej twists rau nws tus kheej, ncua sij hawm tus kws kho mob cov lus teb. Qhov no feem ntau exacerbated los ntawm kev siv cov tsoos polymer shafts los yog laser -txiav hypotubes nrog interrupted txiav qauv. Qhov mob taw tes yog qhov tseeb: yuav ua li cas kom ua tiav 1: 1 torque teb thaum tswj qhov qis profile thiab siab yooj. Lub skived hypotube muab kev daws teeb meem los ntawm kev muab txoj hauv kev txuas ntxiv, helical rau kev sib kis ntawm lub zog, tab sis kev tsim cov nyom ntawm kev ua tiav qhov no ntawm micro- nplai yog qhov tseem ceeb.

Txoj cai ntawm Skiving Technology

Lub hauv paus ntsiab lus tseem ceeb ntawm skiving rau kev txhim kho torque yog tsim kom muaj ib qho helical zawj raws qhov ntev ntawm lub raj hypo. Los ntawm kev tshem tawm cov khoom nyob rau hauv ib tug kauv zam, cov khoom seem ua ib tug nruam coil. Cov kauj no ua haujlwm zoo ib yam li lub caij nplooj ntoos hlav torsion, muaj peev xwm ntawm kev sib hloov lub zog zoo. Qhov tob thiab lub suab ntawm lub skive txiav txim qhov yooj thiab torque yam ntxwv. Ib qho ntiav, nruj-pitch skive ua rau siab torque rigidity tab sis qis dua yooj, thaum qhov sib sib zog nqus, dav -pitch skive muaj kev hloov pauv ntau dua ntawm tus nqi ntawm qee qhov kev sib kis torque. Cov txheej txheem yog ib txoj kev tsim tawm uas tso siab rau ntawm cov shear deformation ntawm cov hlau, kom ntseeg tau tias cov qauv molecular tau ua raws li lub dav hlau shear, uas txhim kho cov khoom siv ntawm lub skived ntug.

Classification ntawm Skiving Equipment

Txhawm rau ua kom tiav cov torque tshwj xeeb, ntau yam kev teeb tsa skiving yog siv:

Helical Skiving Lathes:Nruab nrog synchronized servo motors, cov cav tov no tswj cov axial pub thiab rotational ceev los tsim cov helical geometries.

Pob-Screw Driven Skiving Units:Cov no muaj kev rov ua tau zoo rau kev tsim cov pitches zoo ib yam, qhov tseem ceeb rau cov qauv catheter shafts.

Gantry-Style Skiving Machines:Siv rau txoj kab uas hla loj dua (txog 20 hli), cov no muab cov rigidity uas yuav tsum tau skive thicker - cov hlab ntsa rau daim ntaub ntawv xws li plab aortic aneurysm (AAA) li.

Siab -Speed ​​spindles:​ Rau skiving Nitinol, uas yog tsis yooj yim rau tshuab, siab - ceev spindles nrog pob zeb diamond-coated cov cuab yeej yog tsim nyog los tiv thaiv kev ua hauj lwm hardening thiab xyuas kom meej ib tug du nto.

Phau Ntawv Qhia Txog Kev Ua Haujlwm

Kev teeb tsa rau helical skiving pib nrog kev ua haujlwm ntawm CNC maub los nrog rau qhov xav tau suab thiab qhov tob. Lub raj hypo yog mounted nruab nrab ntawm cov chaw, thiab ib tug ruaj khov so yog siv los txhawb lub raj thiab tiv thaiv kev co. Cov cuab yeej skiving, feem ntau yog ua los ntawm carbide los yog siab - steel ceev, yog nyob ntawm ib lub kaum sab xis ntawm lub raj axis. Thaum lub sijhawm ua haujlwm, lub coolant yuav tsum tau siv ncaj qha rau ntawm qhov kev sib tshuam txiav kom tsis txhob ua - nce ntug ntawm lub cuab yeej. Nws yog ib qho tseem ceeb uas yuav tau ua "qhuav khiav" los xyuas qhov kev sib tsoo thiab xyuas kom meej tias cov cuab yeej txoj kev yog lawm. Tom qab-skiving, lub raj yuav tsum tau muab ntxuav kom huv si kom tshem tawm cov kua qaub uas seem tshuav, ua raws li cov txheej txheem passivation los kho cov chromium oxide txheej ntawm stainless hlau raj.

Tiag -Kev Paub Txog Ntiaj Teb

Los ntawm peb cov kev tsim khoom, peb tau pom tias skived hypotubes ua tau zoo hauv cov ntawv thov uas "pushability" tseem ceeb npaum li lub zog. Nyob rau hauv cov ntaub ntawv tsis ntev los no hais txog lub ureteral access sheath, lub laser -txiav raj nthuav tawm "buckling" nyob rau hauv compression. Los ntawm kev siv tus qauv skived nrog lub suab sib txawv - nruj ze ze thiab xoob distally - peb tau ua tiav ib qho ncej uas tuaj yeem raug thawb los ntawm kev nruj nruj yam tsis muaj kinking. Qhov xwm txheej tas mus li ntawm lub skive muab ib sab lub zog uas cuam tshuam kev txiav tsis tuaj yeem sib phim. Peb kuj tau sau tseg tias qhov ua tiav ntawm qhov skived zawj ua lub luag haujlwm tseem ceeb hauv kev txo qis kev sib txhuam hauv catheter lumen, uas yog qhov tseem ceeb hauv kev xa cov khoom cog.

Summary thiab Sublimation

Lub skived hypotube sawv cev rau kev hloov ntawm "txiav" tivthaiv mus rau "tsim" tivthaiv. Nws yog cov txheej txheem uas hwm cov khoom siv hauv cov hlau, siv cov cuab yeej siv zog los qhib cov yam ntxwv tshiab. Hauv qhov siab -stakes ib puag ncig ntawm cov tshuaj cuam tshuam, qhov twg txhua millimeter ntawm kev txav mus los, lub skived hypotube muab qhov kev ntseeg siab thiab qhov tseeb uas cov kws kho mob xav tau. Nws yog lub kiv puag ncig nyob ntsiag to nyob rau hauv ib qho chaw uas feem ntau nrhiav kev thev naus laus zis tom ntej.

Cov kev cia siab thiab cov lus pom zoo

Raws li cov cuab yeej ua me thiab nyuaj, qhov kev thov rau skived hypotubes tsuas yog nce. Peb pom zoo kom cov engineers tshawb nrhiav kev siv skiving ua ke nrog cov duab- teeb tsa rau Nitinol li, tsim cov khoom uas yog ob qho tib si skived thiab ua ntej - nkhaus. Tsis tas li ntawd, kev txhim kho tiag tiag - lub sijhawm saib xyuas lub sijhawm rau kev caij tsheb kauj vab - siv acoustic emissions lossis quab yuam sensors - tuaj yeem muab cov lus pom zoo uas xav tau kom ua tiav txawm tias nruj dua thiab txo cov nqi seem.