Nyob rau hauv lub tshav pob ntawm precision ntsuas, granite straightedge, raws li ib tug tseem ceeb lub cuab tam los xyuas kom meej qhov tseeb ntawm cov khoom thiab kev ntsuas, nws cov qib flatness ncaj qha cuam tshuam rau kev ntseeg tau ntawm kev ntsuas ntsuas. Lub National Institute of Standards and Technology (NIST) daim ntawv pov thawj ntawm Tebchaws Meskas yog ib qho kev lees paub thoob ntiaj teb rau cov khoom siv ntsuas siab, thiab AA-theem flatness yog ib qho ntawm cov qhab nia siab heev. Raws li lub npe nrov hauv kev lag luam, ZHHIMG, nrog nws cov thev naus laus zis siab heev thiab kev siv tes ua haujlwm nruj, pab cov neeg siv ua tiav NIST ntawv pov thawj thiab AA-theem flatness cov hom phiaj rau granite straighteers. Cov hauv qab no yuav muab rau koj nrog cov ncauj lus kom ntxaws tsom xam ntawm cov ntsiab lus tseem ceeb calibration thiab txoj hauv kev siv.
1. Nkag siab txog NIST ntawv pov thawj thiab AA-theem flatness tus qauv
NIST daim ntawv pov thawj muaj npe nrov rau nws cov txheej txheem kev sim thiab kev soj ntsuam nruj, nrog rau nws lub hom phiaj tseem ceeb yog los xyuas kom meej tias cov cuab yeej ntsuas tau raws li lub ntiaj teb cov qauv kev raug. Hauv thaj tsam ntawm granite straightedge, AA qib flatness yuav tsum tau nruj heev. Feem ntau, nws tau teev tseg tias qhov kev ua yuam kev flatness nyob rau hauv txhua lub meter ntev yuav tsum tswj tsis pub dhau ± 0.5μm. Cov txheej txheem no tso siab rau cov kev xav tau siab heev rau cov khoom siv, kev siv thev naus laus zis thiab calibration thev naus laus zis ntawm qhov ncaj. Lub AA-theem granite straightedge tau ntawv pov thawj los ntawm NIST tsis yog tsuas yog kev lees paub kev ntseeg siab rau kev ntsuas siab, tab sis kuj muaj cov pov thawj muaj zog ntawm lub tuam txhab kev lag luam lub zog thiab cov khoom zoo.
Ii. Qhov Zoo Foundation ntawm ZHHIMG granite straightedge
ZHHIMG granite straightedge tau nteg lub hauv paus high-precision los ntawm cov khoom xaiv theem. Xaiv cov txiaj ntsig zoo nkauj zoo nkauj, nrog ntom hauv cov ntxhia pob zeb thiab tiv thaiv kev ruaj khov thiab tiv thaiv kev ua kom tau txais kev ua tiav aa-theem. Thaum lub sijhawm ua tiav, ZHHIMG siv cov txuj ci siab tshaj plaws xws li CNC sib tsoo thiab polishing, ua ke nrog cov cuab yeej ua kom pom tseeb zoo li laser interferometers rau lub sijhawm ua haujlwm tiag tiag, kom ntseeg tau tias qhov chaw ntawm lub straighteer ua tiav qhov kev ua haujlwm siab heev thaum lub sijhawm ua, tsim kom muaj kev pom zoo rau kev ua haujlwm tom qab calibration.
Iii. Npaj ua ntej Calibration
Ua ntej ua NIST daim ntawv pov thawj calibration, nws yog ib qho tsim nyog los xyuas kom meej tias cov straightedge nyob rau hauv qhov zoo tshaj plaws mob. Ua ntej ntawm tag nrho cov, qhov chaw ntawm lub straightedge yuav tsum tau ntxuav tob heev. Siv ib daim ntaub tsis muaj lint thiab ib lub tshuab ntxuav tshwj xeeb kom tshem tawm cov roj stains, plua plav thiab lwm yam impurities ntawm qhov chaw kom tsis txhob muaj impurities cuam tshuam rau qhov tseeb calibration. Qhov thib ob, tso qhov ncaj ncaj rau hauv ib puag ncig nrog qhov kub thiab txias tsis tu ncua rau ntau tshaj 24 teev kom tso cai rau nws hloov mus rau qhov kub thiab av noo ib puag ncig, tshem tawm me me deformations tshwm sim los ntawm kev hloov ib puag ncig. Tsis tas li ntawd, cov cuab yeej calibration siab xws li laser interferometers thiab qib hluav taws xob yuav tsum tau npaj. Qhov tseeb ntawm cov cuab yeej no ncaj qha cuam tshuam rau qhov tseeb ntawm cov txiaj ntsig calibration.
Iv. Calibration txheej txheem thiab cov cuab yeej tseem ceeb
Rough calibration: Siv qib hluav taws xob los ua qhov kev ntsuas thawj zaug ntawm qhov ncaj. Sau qhov ntsuas ntsuas ntawm qee lub sijhawm (xws li 100mm) kom tau txais cov ntaub ntawv kwv yees contour ntawm qhov chaw ncaj. Raws li cov txiaj ntsig kev ntsuas, qhov saum npoo ntawm qhov ncaj yog roughly machined los ntawm CNC sib tsoo cov cuab yeej kom tshem tawm cov ntsiab lus siab, ua rau lub flatness pib mus rau AA-theem tus qauv yuav tsum tau ua.
Precision calibration: High-precision ntsuas yog ua los ntawm kev siv lub laser interferometer, uas tuaj yeem txheeb xyuas qhov siab hloov pauv ntawm qhov chaw ncaj nraim ntawm qib micrometer. Raws li cov ntaub ntawv pub rov qab los ntawm lub interferometer, qhov chaw ntawm lub straightedge yog finely hauv av los ntawm kev sib tsoo phau ntawv sib tsoo nrog CNC machining. Thaum lub sij hawm sib tsoo txheej txheem, kev sib tsoo siab thiab kev taw qhia yuav tsum tau hloov kho tas li kom maj mam tshem tawm qhov kev ua yuam kev flatness, kom lub ntsej muag flatness ntawm lub straightedge tuaj yeem ncav cuag qib siab dua.
Rov ua dua kev txheeb xyuas thiab kho kom zoo: Tom qab ua tiav qhov kev ntsuas zoo, siv lub laser interferometer thiab qib hluav taws xob los ua qhov kev tshuaj xyuas tag nrho ntawm qhov ncaj rov qab los xyuas kom meej tias qhov kev ua yuam kev flatness ntawm txhua qhov ntsuas ntsuas yog nyob rau hauv AA-theem tus qauv. Yog tias muaj qhov yuam kev me me hauv cheeb tsam hauv cheeb tsam, lub hom phiaj zoo-tuning yuav tsum tau ua kom txog rau thaum tag nrho cov flatness ntawm lub straightedge tag nrho raws li AA-theem yuav tsum tau ntawm NIST ntawv pov thawj.
V. NIST Certification Application and Review
Tom qab ua tiav qhov calibration thiab paub meej tias qhov ncaj tau ua tiav AA-theem flatness, koj tuaj yeem xa daim ntawv pov thawj rau NIST. Thaum lub sij hawm daim ntawv thov txheej txheem, cov ncauj lus kom ntxaws technical parameters ntawm lub straightedge, ua technology piav qhia, calibration ntaub ntawv thiab lwm yam ntaub ntawv yuav tsum tau muab. NIST yuav xa cov kws tshuaj xyuas cov kws tshaj lij los ua qhov kev tshuaj xyuas ntawm qhov chaw thiab kev ntsuam xyuas ntawm qhov ncaj. Kev tshuaj xyuas yuav npog ntau yam xws li flatness, thermal stability, thiab hnav tsis kam ntawm straightedge. Tsuas yog granite straightedge uas tau dhau kev tshuaj xyuas nruj tuaj yeem tau txais NIST daim ntawv pov thawj thiab dhau los ua cov khoom lag luam ntsuas hauv kev ntsuas qhov tseeb.
Los ntawm kev ua raws li cov lus hais saum toj no ZHHIMG granite straightedge calibration cov lus qhia, cov lag luam thiab cov chaw tshawb fawb tuaj yeem ua tiav NIST ntawv pov thawj thiab AA-theem flatness cov hom phiaj ua tau zoo dua. Txawm hais tias nyob rau hauv kev lag luam uas tsis tshua muaj siab precision yuav tsum xws li mechanical manufacturing, aerospace, los yog hluav taws xob chips, ZHHIMG granite straightedge tau ntawv pov thawj los ntawm NIST yuav dhau los ua tus neeg koom tes txhim khu kev qha hauv kev ua kom ntsuas qhov tseeb thiab cov khoom zoo, pab cov lag luam tsis tu ncua los ntawm kev ntsuas kev ntsuas thiab txav mus rau yav tom ntej ntawm kev siab dua.
Post lub sij hawm: May-13-2025