Nyob rau hauv lub realm ntawm precision manufacturing, CNC tig stands raws li ib tug txheej txheem rau tsim rotational, axisymmetric qhov chaw. Kev ua haujlwm ntawm cov khoom siv capped-cov khoom uas muaj qhov kawg kaw lossis ntu ntu, xws li qee qhov li qub, hydraulic fittings, lossis kev cai fasteners- nthuav tawm cov teeb meem sib txawv thiab yuav tsum tau npaj cov txheej txheem kom zoo. Tsab ntawv xov xwm no qhia txog cov kev xav tseem ceeb, cov tswv yim ua haujlwm, thiab kev tswj xyuas kev tswj xyuas qhov tseem ceeb rau kev ua tiav ntawm kev ua tau zoo ntawm - zoo capped qhov chaw ntawm CNC tig.
1. Kev Ntsuam Xyuas Ib Ntu thiab Kev Npaj Ua Haujlwm
Lub ntsiab lus ntawm cov khoom capped yog qhov kawg kaw, uas tshem tawm qhov ua tau ntawm machining los ntawm sab nraud hauv ib qho kev teeb tsa. Qhov no yuav tsum tau soj ntsuam cov ncauj lus kom ntxaws ntawm qhov ntev ntev, geometric tolerances (piv txwv li, concentricity, cylindricity ntawm lub bore mus rau sab nraud), thiab qhov yuav tsum tau ua kom tiav rau ob qho tib si sab hauv thiab sab nraud. Kev xaiv cov khoom siv-txawm nws yog aluminium alloys zoo li 6061-T6, stainless hlau xws li 303 lossis 316, lossis engineering plastics zoo li PEEK- ncaj qha cuam tshuam rau kev txiav, xaiv cov cuab yeej, thiab cov tswv yim ua kom txias.
Daim ntawv txheej txheem muaj zog yog qhov tseem ceeb. Nws yuav tsum tau txhais cov kab ke ntawm kev ua haujlwm, feem ntau pib nrog kev tig ntsej muag thiab nruab nrab ntawm qhov qhib kawg los tsim kom muaj cov ntaub ntawv meej. Cov kauj ruam tseem ceeb yog machining cov yam ntxwv sab hauv (bore, threads, grooves) ua ntej tsim cov profile sab nraud thiab lub hau. Cov kab ke no ua kom muaj kev ruaj ntseg thiab tso cai rau kev ua haujlwm sab hauv kom raug thaum lub workpiece muaj cov khoom siv ntau tshaj plaws.
2. Cov tswv yim kho thiab cuab yeej
Kev ruaj ntseg ua haujlwm yog qhov tseem ceeb. Standard 3-lub puab tsaig chucks feem ntau txaus rau kev pib ua haujlwm. Txhawm rau ua kom tiav lub hau ntawm sab nraud geometry thiab ua tiav qhov kev sib tw nruj, ua haujlwm ib lub chuck los yog ib qho kev cai mandrel uas koom nrog lub tshuab ua haujlwm tau zoo yuav tsim nyog. Qhov no minimizes runout thiab xyuas kom meej lub hau lub nta yog concentric rau hauv axis.
Kev xaiv cov cuab yeej xav tau kev saib xyuas tshwj xeeb. Rau sab hauv tho txawv thiab threading, txuas ntxiv ISO carbide inserts nrog zoo rakes thiab txaus clearance yog qhov tseem ceeb kom ncav cuag mus rau hauv qhov tob, qhov chaw nyob ze ntawm lub capped kawg. VDI cov cuab yeej muab rigidity hauv CNC turrets. Rau undercutting lossis machining lub kaum sab hauv uas lub bore ua tau raws li lub hau, cov cuab yeej tshwj xeeb grooving lossis kev cai - cov cuab yeej yuav tsum tau ua. Sab nraud tig ntawm lub hau dome feem ntau siv CNC programmable tailstocks lossis cov chaw nyob rau kev txhawb nqa thaum lub sij hawm profileing los tiv thaiv deflection.
3. Machining Parameters thiab Cycle Optimization
Txiav tsis yuav tsum tau raws li cov khoom thiab feature geometry. Piv txwv li:
- Rau roughing 316 stainless hlau: Txiav ceev (Vc) ≈ 120-150 m / min, Pub tus nqi (f) ≈ 0.15-0.25 mm / rev.
- Kev ua tiav aluminium 6061: Vc ≈ 250-350 m / min, f ≈ 0.05-0.1 mm / rev.
High -Pressure Coolant (HPC) systems tau txais txiaj ntsig zoo heev. Lawv tshem tawm cov chips los ntawm qhov tob tob, tiv thaiv chip recutting, thiab txhim kho lub neej ntawm cov cuab yeej, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv uas muaj stringy chips. Lub voj voog lub sij hawm ua kom zoo yuav suav nrog kev sib npaug ntawm qhov sib luag thiab ua tiav, siv qhov kev tswj xyuas qhov nrawm nrawm (G96) kom ua tiav zoo ib yam, thiab siv cov nti ua haujlwm tau zoo - rhuav tshem.
4. Kev Ua Haujlwm Zoo thiab Kev Ntsuas
Tom qab- kev tshuaj xyuas machining tsis yog-negotiable. Qhov loj me tseem ceeb tau txheeb xyuas siv cov calipers thiab micrometers. Internal diameters thiab grooves yog ntsuas nrog bore gauges los yog CMMs (Coordinate Measuring Machines). Lub concentricity ntawm lub sab hauv bore thiab lub sab nraud cap inch yog ib tug tseem ceeb metric, feem ntau soj ntsuam siv ib tug dial qhia rau ib tug V-block los yog, ntau yog, nrog ib tug CMM. Nto roughness yog ntsuas nrog ib tug profileometer raws li ISO 4287 tus qauv. Rau threaded qhov chaw, xov gauges (Go/No-Go) los yog optical comparors yog ua hauj lwm.
CovCNC tig capped qhov chawyog ib daim ntawv thov sophisticated uas xav tau kev txawj ntse nyob rau hauv cov txheej txheem tsim, tooling, thiab tshuab programming. Kev vam meej hinges ntawm lub laj thawj kev ua haujlwm ib ntus, nruj fixturing los tiv thaiv lub hauv paus machining imbalance, thiab kev siv tswv yim ntawm cov cuab yeej tshwj xeeb kom nkag tau rau hauv cov geometries. Los ntawm kev ua raws li cov txheej txheem kev teeb tsa, kev ua kom zoo ntawm cov ntaub ntawv txiav, thiab ua raws li kev soj ntsuam nruj me ntsis, cov tuam txhab tsim khoom tuaj yeem tsim cov khoom nyuaj no kom tau raws li cov lus qhia nruj, ua kom ntseeg tau thiab ua tau zoo hauv lawv qhov kawg - siv daim ntawv thov. Rau cov kws tshaj lij kev muag khoom, kev nkag siab txog cov kev qhia tshwj xeeb no yog qhov tseem ceeb rau kev ntsuam xyuas tus neeg muag khoom muaj peev xwm thiab ua kom muaj qhov zoo.