Tag nrho peb VABB koob tshuaj yog tsim los ntawm Swiss -hom zawv zawg headstock tshuab dhos (Citizen L12-1M7). Lub tshuab no muab qhov tseeb ntawm qhov chaw ntawm ± 0.005 hli thiab rov ua qhov tseeb ntawm ± 0.002 hli, muaj peev xwm ua tiav cov haujlwm sib xyaw suav nrog milling, drilling thiab xov tig hauv ib qho kev teeb tsa clamping.

Ua piv txwv li rab koob, kwv yees li 30 feeb yuav tsum tau mills peb qhov nkhaus, yielding rab chais - ntse txiav. A 0.4531-inch tiaj tus-kawg square zeb yog pub perpendicular mus rau txoj kev txiav thaum lub sij hawm machining kom lav tsis muaj burr-dawb hniav npoo.

Cov lej ntawm cov khoom lag luam, cov lej batch thiab cov kab kawm tiav qhov tob yog etched rau sab nrauv ntawm cov qauv thais cannulas. Fiber laser marker (JPT hom) ua tsis tau -hu rau ablation nrog ib tug controllable marking qhov tob ntawm 10-20 μm rau mus tas li, hnav- tiv taus cov cim.

Sandblasting raws li nram no: 80-120 mesh alumina hais yog blasted ntawm 0.4-0.6 MPa los tsim ib tug uniform matte tiav. Qhov no txo ​​cov teeb pom kev zoo thiab txhawb nqa adhesion rau cov txheej txheej tom ntej.

Lub hauv ntej kawg ntawm lub txiav cannula undergoes flaring mus rau lub tsev txiav hniav, thaum lub rear puab bore yog chamfered rau unobstructed cov ntaub so ntswg. Lub tshuab dhos ruaj ntseg tubing nrog tshwj xeeb fixtures, thiab tsim tooling ua tiav flaring thiab chamfering nyob rau hauv ib tug pass, xyuas kom meej concentricity tsawg tshaj li los yog sib npaug zos rau 0.01 hli.

Longitudinal slot milling yog tom qab ntawd tiav ntawm tib lub tshuab; qhov dav yog sib npaug rau cov hniav tuab nrog kev ua siab ntev ntawm ± 0.005 hli kom ntseeg tau tias du, jam{1}}dawb reciprocating suab ntawm cov hniav txiav.

Tag nrho cov hlau stainless yog thawj zaug rau hauv 10% -20% citric acid tov ntawm 60℃rau passivation. Qhov no tshem tawm cov hlau dawb thiab tsim cov chromium-nplua nuj oxide zaj duab xis, txhim kho corrosion kuj 3 mus rau 5 npaug ntawm cov khoom tsis kho.

Electropolishing yog ua tom ntej, siv phosphoric -sulfuric acid sib tov ua electrolyte ntawm qhov ceev tam sim no ntawm 0.5–1.0 A / cm². Anodic dissolution tshem tawm cov microscopic nto peaks, txo qhov roughness Ra ntawm 0.8 μm mus rau hauv qab 0.1 μm. Polished koob shafts pom qhov txo coefficient ntawm kev sib txhuam, txo kev raug mob rau cov neeg mob cov ntaub so ntswg.

Tom qab electropolishing, Cheebtsam undergo 15 feeb ntawm 40 kHz ultrasonic tu nyob rau hauv dej deionized kom strip residual polishing kua thiab particulate khib nyiab. Tom qab ntawd cov khoom yuav qhuav rau hauv Chav Kawm 10000 chav huv thiab lub tshuab nqus tsev- kaw hauv ob lub hnab - txheej PE.

Batch sampling yog ua rau kev kuaj cov kab mob sib kis (particle suav Ntau dua lossis sib npaug li 10 μm Tsawg dua lossis sib npaug li 100 particles / mL) txhawm rau txheeb xyuas qhov ua tau raws li ISO 13485 cov lus qhia tshwj xeeb.