Cov Lus Qhia Txog Kev Siv Tshuab thiab Kev Txij Nkawm ntawm Granite Surface Plate: Lub phaj granite surface uas raug thiab raug yuav tsum tau siv tshuab thiab kev txij nkawm tshwj xeeb kom ntseeg tau tias nws raug thiab siv tau ntev. Ua ntej Polishing, cov khoom granite yuav tsum tau ua tiav kev siv tshuab thawj zaug thiab kev kho kab rov tav raws li cov ntsiab cai ntawm kev teeb tsa peb sab. Tom qab kev sib tsoo kab rov tav, yog tias CNC machining tsis tuaj yeem ua tiav qhov raug uas xav tau - feem ntau mus txog Qib 0 qhov raug (0.01mm / m kev kam rau siab raws li tau teev tseg hauv DIN 876) - kev ua tiav tes yuav tsum tau ua kom tiav qib siab dua xws li Qib 00 (0.005mm / m kev kam rau siab ib qho ASTM B89.3.7 tus qauv).
Cov txheej txheem machining muaj ntau kauj ruam tseem ceeb. Ua ntej, kev sib tsoo ntxhib tsim kom muaj qhov tiaj tiaj, ua raws li kev ua tiav theem ob kom tshem tawm cov cim machining. Kev sib tsoo meej, feem ntau ua tes, kho qhov chaw kom ua tiav qhov kev kam rau siab thiab qhov roughness ntawm qhov chaw (Ra tus nqi ntawm 0.32-0.63μm, qhov twg Ra sawv cev rau qhov sib txawv ntawm tus lej nruab nrab ntawm qhov profile ntawm qhov chaw). Thaum kawg, kev tshuaj xyuas kom zoo ua kom ua raws li cov qauv kev siv tshuab, nrog cov ntsiab lus ntsuas tau muab tso rau ntawm cov kab pheeb ces kaum, ntug, thiab kab nruab nrab - feem ntau yog 10-50 cov ntsiab lus nyob ntawm qhov loj ntawm lub phaj - kom ntseeg tau tias muaj kev ntsuas qhov tseeb sib xws.
Kev tuav thiab kev teeb tsa muaj feem cuam tshuam rau qhov tseeb. Vim yog granite lub zog khov kho (Mohs hardness 6-7), kev tsa tsis raug tuaj yeem ua rau deformation mus tas li. Rau cov ntawv thov tseem ceeb uas xav tau Qib 00 precision, kev siv tes tom qab kev teeb tsa yog qhov tseem ceeb los kho qhov tseeb thaum lub sijhawm thauj mus los. Qhov kev saib xyuas no rau cov ntsiab lus sib txawv qhov zoo tshaj plaws precision granite nto phaj los ntawm cov qauv machined.
Cov kev coj ua txij nkawm cuam tshuam ncaj qha rau kev ua haujlwm thiab lub neej ntev. Pib nrog kev ntxuav kom huv si siv cov tshuaj ntxuav pH nruab nrab - zam cov tshuaj acidic uas tuaj yeem ua rau saum npoo. Kev ntsuas txhua xyoo nrog laser interferometers, taug qab mus rau NIST cov qauv, ua kom muaj kev raug. Thaum tso cov khoom ua haujlwm, cia qhov sib npaug ntawm thermal (feem ntau 15-30 feeb) kom tiv thaiv kev ntsuas yuam kev los ntawm qhov sib txawv ntawm qhov kub thiab txias. Tsis txhob txav cov khoom ntxhib hla saum npoo, vim qhov no tuaj yeem tsim cov khawb me me uas cuam tshuam rau qhov tiaj tus.
Cov lus qhia siv kom raug suav nrog kev hwm cov kev txwv ntawm kev thauj khoom kom tiv thaiv kev hloov pauv ntawm cov qauv, tswj kom ruaj khov rau ib puag ncig (kub 20 ± 2 ° C, av noo 50 ± 5%), thiab siv cov khoom siv tsa tshwj xeeb kom tsis txhob muaj kev puas tsuaj rau lub dav hlau. Tsis zoo li cov hlau sib piv, kev ruaj khov ntawm granite (0.01ppm / ° C) txo qis kev cuam tshuam ntawm ib puag ncig, tab sis kev hloov pauv kub sai sai yuav tsum tau zam.
Ua ib lub cuab yeej tseem ceeb hauv kev ntsuas qhov tseeb, cov phaj granite nto uas tau ntawv pov thawj (ISO 17025 tau lees paub) ua haujlwm ua tus qauv siv rau kev ntsuas qhov ntev. Lawv txoj kev saib xyuas yuav tsum tau siv zog tsawg kawg nkaus - tsuas yog so kom huv nrog daim ntaub tsis muaj plaub tom qab siv - tsis tas yuav muaj cov txheej txheem tshwj xeeb lossis cov roj nplua nyeem. Los ntawm kev ua raws li cov txheej txheem machining thiab kev saib xyuas no, cov phaj granite nto precision muab kev ua tau zoo txhim khu kev qha rau ntau xyoo caum, ua rau lawv tsis tseem ceeb hauv cov chaw kuaj ntsuas, kev tsim khoom hauv aerospace, thiab cov ntawv thov engineering siab.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-19-2025