Nug ib chav uas muaj cov kws kho metrology uas lawv xav xaiv rau ib qho tshiabprecision puag, thiab feem ntau yuav tsaws ntawm granite yam tsis muaj kev sib cav ntau. Qhov kev pom zoo tsis yog kev lag luam - nws yog kaum xyoo ntawm kev paub dhau los, thiab nws tsim nyog tshem tawm vim li cas, vim tias cov laj thawj tsis yog ib txwm xav li cas cov neeg yuav khoom xav tias thaum lawv xub pom "granite nto phaj" ntawm cov lus tsocai.
Case tawm tsam cov kev xaiv
Cam khwb cia hlau yog tus qauv qub rau daim hlau saum npoo, thiab hauv qee qhov kev siv tshuab cuab yeej nws tseem tuav tau zoo. Tab sis cam khwb cia hlau nqa cov kev ntxhov siab sab hauv los ntawm cov txheej txheem casting nws tus kheej, kev ntxhov siab uas maj mam txo qis xyoo dhau los thiab qhia tau tias maj mam, tsis muaj kev sib cav. Nws tseem yog cov hlau nplaum, uas tsis tsim nyog nws ncaj qha rau cov npe loj hlob ntawm cov ntawv thov uas muaj kev cuam tshuamkhoom siv ntsuas hluav taws xob. Cov hlau thiab txhuas hauv paus qhia txog cov teeb meem cuam tshuam: thermal expansion coefficients siab txaus uas ob peb degrees ntawm qhov kub thiab txias hloov pauv tuaj yeem hloov qhov ntev ntsuas hla ib lub 'meter' - nplai nto - raws nraim hom drift uas rhuav tshem lub voj voog calibration tsis muaj leej twg xav nug.
Tom qab ntawd muaj qhov teeb meem hloov marble, uas tsis tau tham txog pej xeem ntau npaum li nws yuav tsum tau. Marble zoo nkaus li zoo li dub granite rau qhov tsis yog- tus kws tshaj lij qhov muag, raug nqi tsawg dua, thiab qee tus neeg muag khoom siv nws poob- hloov pauv yam tsis tau nthuav tawm qhov hloov. Qhov teeb meem yog tias marble yog softer, ntau ntxeem tau, thiab considerably tsawg dimensionally ruaj khov nyob rau hauv rov qab load thiab humidity raug. Lub phaj saum npoo uas pib nyob rau hauv lub siab ntev tuaj yeem tawm ntawm nws hauv ib xyoos lossis ob xyoos, thiab los ntawm lub sijhawm uas tshwm sim hauv cov ntaub ntawv tshuaj xyuas, tus neeg siv khoom twb tau tsim kev ntseeg siab ntawm cov lej uas tsis muaj kev ntseeg siab. Nws yog qhov sib txawv tsim nyog txheeb xyuas ncaj qha nrog txhua tus neeg muag khoom, tsis suav nrog cov duab khoom.
Dab tsi ua Granite ua haujlwm tiag tiag
Ntuj dub granite qhov kom zoo dua los ntawm ib txhais tes ntawm lub cev muaj zog uas tshwm sim los ua kom zoo nrog qhov kev ntsuas qhov xav tau. Nws muaj qhov qis thermal expansion coefficient, txhais tau tias nws nyob ruaj khov nyob ntawm qhov kub thiab txias ntawm lub khw hauv pem teb kev paub dhau ib hnub. Nws tsis yog - sib nqus thiab hluav taws xob tsis yog -conductive, uas tseem ceeb dua rau cov khoom siv hluav taws xob semiconductor thiab cov khoom siv hluav taws xob tsim hluav taws xob uas cov chaw sib nqus sib nqus lossis cov nqi hluav taws xob tuaj yeem cuam tshuam nrog cov cuab yeej rhiab heev. Nws cov qauv crystalline ua rau nws muaj zog vibration-cov yam ntxwv damping - granite puag absorbs thiab dissipates kev co es tsis xa nws, uas yog ib feem ntawm vim li cas nws tseem yog lub neej ntawd xaiv rau CMM bases, optical soj ntsuam cov rooj, thiab tswj kev ntsuas platforms.
Qhov ntom ntom yog qhov sib txawv uas sib cais siab tiag tiag -qib granite los ntawm qib qis - qib Tshuag, thiab nws yog tus lej tsim nyog nug cov neeg muag khoom ncaj qha. Denser granite, nyob rau hauv thaj tsam ntawm kwv yees li 3,100 kg / m³ rau siab dua -qib dub granite, nyiam sib cuam tshuam nrog kev sib raug zoo nrog sab hauv thiab qeeb qeeb ntev -lub sij hawm nkag mus rau hauv kev thauj mus los - ib yam dab tsi uas tseem ceeb rau qhov loj - hom hauv paus nqa hnyav fixtures rau xyoo tsis muaj recalibration. qis dua- qhov ntom ntom lossis cov khoom ntxeem tau tuaj yeem dhau qhov kev tshuaj ntsuam thawj zaug tab sis nws yooj yim dua rau qhov kev sib tw me me, tshwj xeeb tshaj yog nyob rau hauv qhov chaw ntub dej uas nqus dej los ua qhov tseem ceeb.
Qhov Kev Xaiv Qib Ua Tau tshwm sim hauv daim ntawv thov
Tsis yog txhua yam granite xav tau tib qib ntawm pob zeb. Ib tug dav - lub hom phiaj fixture puag rau lub teeb sib dhos ua hauj lwm muaj qhov yuav tsum tau sib txawv tshaj li ib tug granite platform txhawb ib tug peb -coordinate ntsuas tshuab los yog ib tug femtosecond laser theem. Cov ntawv thov xws li PCB drilling cov cuab yeej, wafer tshuaj xyuas platforms, linear motor theem, thiab cov khoom siv roj teeb ntawm tes kuaj tau nce ntxiv kom nruj dua thiab qis dua - lub sij hawm drift dua li kev siv dav dav, tsuas yog vim tias qhov siab ntev ntawm cov cuab yeej zaum saum toj tau nruj heev hauv kaum xyoo dhau los. Buyers sourcing granite for these applications are usually better served asking pointed questions about density, grain consistency, and finishing method than trusting a generic "precision granite" label.
Granite ntsuas cov cuab yeej - deg daim hlau, squares, straightedges, parallels - nqa ib yam tab sis txawv kev txiav txim siab. Granite nto phaj siv raws li tus qauv siv ntsuas ntsuas xav tau qib sib txawv ntawm kev txheeb xyuas qhov sib txawv thiab kev ntsuas qhov tseeb dua li lub hauv paus granite siv purely raws li cov qauv mounting nto. Conflating ob, uas tshwm sim ntau dua li qhov nws yuav tsum tau hauv kev yuav khoom, yuav ua rau muaj kev them nyiaj ntau dhau rau kev kam rau siab uas tsis xav tau lossis underspecifying ib feem uas ua tau raws li kev ntsuas ntsuas.
Ib Tus Qauv Tsim Nyog rau Kev Ntsuas
Tsis muaj qhov no txhais tau hais tias granite yog dhau qhov kev tshuaj xyuas lossis tias txhua tus neeg muab khoom siv granite muab qhov zoo sib xws - qib, qhov ntom ntom, kev sib tsoo, thiab kev ntsuas qhov sib txawv ntawm qhov sib txawv ntawm qhov kev lag luam, thiab qhov kev sib txawv ntawd yog qhov tseem ceeb ntawm kev mob siab rau. Dab tsi cov ntaub ntawv muab, thaum muab thiab ua tiav kom raug, yog lub hauv paus ruaj khov ntawm lub cev uas cov kev xaiv tsis tau tswj hwm los hloov cov ntawv thov precision, txawm tias ntau xyoo ntawm kev sib xyaw thiab cov khoom siv ceramic nkag mus rau hauv kev ua lag luam. Qhov ntawd tsis yog ib qho kev thov tshwj xeeb rau ib tus neeg xa khoom - nws yog ze rau qhov kev pom zoo thoob plaws hauv kev ntsuas ntsuas, thiab nws tau tuav vim tias lub cev tom qab nws tsis tau hloov pauv tiag tiag.