Taw qhia: Daim Ntawv Qhia Kev Tsim Nyog rau Siab -Precision Assemblies
Thaum cov kws tsim qauv tsim qauv pib tsim kho tom ntej - cov khoom siv hluav taws xob semiconductor, tswj cov cuab yeej ntsuas, lossis ultra- CNC sib tsoo tshuab, lawv ntsib cov kev xaiv cov khoom tseem ceeb. Cov txheej txheem voj voog ntawm lub tshuab yuav tsum txhawb nqa siab dynamic loads thaum tswj sub-micron geometric references. Cov lus FAQ no hais txog cov lus nug tseem ceeb ntawm lub cev, kev suav cov qauv, thiab cov khoom siv sib piv cov ntsuas uas cov kws kho tshuab yuav tsum xav txog thaum tsim ultra- cov qauv txheej txheem.
Q1: Vim li cas granite lub cev zoo dua rau grey cam khwb cia hlau rau cov chaw nyob ruaj khov metrology?
A1: Ntuj dub granite muaj peb lub cev zoo tshaj plaws ntawm cov hlau cam: tshwj xeeb thermal stability, kev tiv thaiv rau qhov seem ntawm qhov kev ntxhov siab, thiab ua tiav kev tiv thaiv corrosion thiab magnetic teb.
Los ntawm kev pom thermal, cov kab hluav taws xob thermal expansion coefficient ntawm UNPARALLELED granite yog kwv yees li 5.0 txog 6.0 x 10^-6 ib Kelvin, qhov cam khwb cia hlau zaum ntawm kwv yees li 12.0 x 10^-6 ib Kelvin. Qhov no txhais tau hais tias granite undergoes tsawg tshaj li ib nrab ntawm qhov seem distortion ntawm hlau thaum raug rau hauv cheeb tsam kub hloov pauv.
Tsis tas li ntawd, cam khwb cia hlau yog qhov ua rau ntev -lub sij hawm micro- kev so ntawm cov txheej txheem, ua rau kom muaj kev sib tw me ntsis dhau xyoo ntawm kev pabcuam. Ntuj dub granite, muaj geologically hnub nyoog ntau lab xyoo nyob rau hauv loj crustal pressures, yog kiag li tsis muaj kev nro sab hauv, lav tias nws txhais tes -lapped reference nto nyob ruaj khov rau ntau xyoo.
Qhov nthuav dav ntawm granite (kwv yees li 5.5 x 10^-6 ib Kelvin) yog tsawg dua ib nrab ntawm cov hlau cam khwb cia (kwv yees 12.0 x 10^-6 ib Kelvin).
Q2: Raws li qhov xwm txheej zoo li cas yuav tsum tus kws tshaj lij qhia txog Silicon Carbide (SiC) ceramics tshaj granite?
A2: Silicon Carbide (SiC) yuav tsum raug xaiv thaum siab - nrawm nrawm, qhov muaj zog ruaj khov, thiab qis qis yog ib txhij xav tau rau cov khoom txav. Thaum granite yog ib qho khoom tshwj xeeb rau lub hauv paus loj, nyob ruaj khov, nws qhov hnyav hnyav (3100 kilograms ib lub cubic meter) thiab cov Young's modulus qis (kwv yees li 60 txog 80 Giga-Pascals) ua rau nws tsis haum rau siab -ceev txav gantries los yog txhais theem.
SiC ceramics muaj qhov tsis txaus ntseeg Young's modulus ntawm ntau dua 380 Giga-Pascals ua ke nrog qhov ntom ntom ntawm 3.15 grams ib cubic centimeter. Qhov no ua rau muaj qhov tshwj xeeb nruj ntawm kwv yees li 120 Giga-Pascals ib gram ib cubic centimeter, tso cai rau txav cov qauv kab teeb kom nrawm ntawm tus nqi siab tshaj 20 meters ib ob squared yam tsis muaj cov qauv deflection, txo cov sij hawm daws teeb meem thiab ua kom cov khoom siv hluav taws xob nce ntxiv.
Q3: Yuav ua li cas ntxhia casting txo CNC machining voj voog lub sij hawm thaum txhim kho nto tiav zoo?
A3: Cov kev ua haujlwm tseem ceeb sib txawv yog kev vibration damping. Mineral casting nta ib qho epoxy- resin aggregate matrix uas absorbs mechanical vibration zog mus txog 10 npaug sai dua li cov tsoos grey cam khwb cia hlau.
Thaum lub sij hawm siab -milling los yog sib tsoo, cov cuab yeej txiav excites lub tshuab qauv. Yog lub tshuab puag yognrum hlau, cov kev vibrations tsis tu ncua, ua rau cov cuab yeej chatter thiab nto imperfections ntawm lub workpiece. Mineral casting qhov siab damping piv (kwv yees li 0.02) sai sai suppresses cov kev vibrations. Qhov no tso cai rau cov tshuab CNC khiav ntawm qhov nrawm dua spindle thiab pub tus nqi, txo lub sij hawm lub voj voog thaum ua tiav qhov roughness tiav ntawm tsawg dua 0.1 micrometers thiab txuas ntxiv cov cuab yeej txiav lub neej txog li 30 feem pua.
Qhov damping piv ntawm cov ntxhia casting yog kwv yees li 10 npaug siab dua li ntawm grey cam khwb cia hlau.
Q4: Dab tsi ntawm ib puag ncig thiab thermal stabilization raws tu qauv yuav tsum tau ua ua ntej kev ntsuas qhov kawg?
A4: Rau sub-micron metrology systems, calibration ib puag ncig yuav tsum nruj me ntsis tswj rau 20 degrees Celsius, ntxiv los yog rho tawm 0.5 degrees, nrog ib tug txheeb ze av noo ntawm 40 feem pua mus rau 60 feem pua.
Vim tias tsis yog-cov khoom siv hlau zoo li granite muaj cov thermal conductivity tsawg (kwv yees li 3.0 Watts ib meter Kelvin), lawv hnov mob maj mam hloov mus rau qhov kub thiab txias. Yog li ntawd, txhua yam khoom siv coj mus rau hauv lub chaw kuaj ntsuas ntsuas yuav tsum tau ua kom lub sijhawm thermal so ntawm yam tsawg kawg 48 mus rau 72 teev kom ncav cuag qhov ua tiav, cov thermal sib npaug.
Kev ntsuas ua ntej tag nrho cov thermal stabilization yuav skewed los ntawm cov thermal gradients sab hauv, ua rau khoov thiab tsis raug calibration nyeem.
Q5: Cov xov hlau puas tuaj yeem ua tau raws li cov lus qhia kev ntseeg siab rau hauv granite thiab ntxhia casting qauv?
A5: Yog. UNPARALLELED specializes nyob rau hauv kev cai kev koom ua ke ntawm hlau Cheebtsam rau hauv ob qho tib si granite thiab ntxhia casting puag.
Rau cov hauv paus granite, siab - qhov precision qhov yog CNC-drilled, thiab stainless hlau los yog invar threaded inserts yog mus tas li sib raug zoo siv proprietary siab - zog epoxy formulations. Invar yog qhov zoo dua vim tias nws cov thermal expansion coefficient (kwv yees li 1.2 x 10^-6 ib Kelvin) txo qis hauv cheeb tsam kev ntxhov siab ntawm lub pob zeb-hlau interface.
Rau cov ntxhia casting, steel mounting daim hlau, cov kab cua txias, thiab cov kav dej hluav taws xob tuaj yeem cuam tshuam ncaj qha rau hauv cov qauv sib xyaw thaum lub caij txias - txheej txheem kho. Qhov no tsim ib qho kev sib xyaw ua ke, monolithic qauv nrog xoom residual kev nyuaj siab.
Q6: Yuav ua li cas thermal conductivity ntawm ntxhia casting piv rau cam khwb cia hlau, thiab vim li cas nws tseem ceeb?
A6: Mineral casting muaj qhov thermal conductivity tsawg heev ntawm kwv yees li 1.5 txog 2.0 Watts ib meter Kelvin, whereas cam khwb cia hlau nthuav tawm cov thermal conductivity ntawm kwv yees li 50 Watts ib meter Kelvin.
Nyob rau hauv lub tshuab rhiav nrog ambient kub hloov pauv, cam khwb cia hlau ua cua sov sai, ua rau tag nrho lub tshuab thav duab kom deform sai sai nyob rau hauv cov lus teb rau lub zos qhov chaw kub (xws li lub spindle motor los yog coolant tank).
Mineral casting ua raws li thermal insulator. Nws reacts qeeb heev rau qhov kub thiab txias, qhov chaw tshav kub hauv zos, thiab cov ntawv sau. Qhov loj heev thermal damping no tiv thaiv luv luv -lub sij hawm thermal distortion, kom ntseeg tau tias cov geometric alignment thiab raug ntawm machining axes nyob ruaj khov nyob rau hauv lub hnub ua hauj lwm.