Kev lag luam cov cuab yeej precision yog ntsiag to nkag mus rau cov ntaub ntawv tshiab. Tau ntau xyoo lawm, cov lus teb rau yuav luag txhua qhov ultra- cov lus nug ntawm cov qauv zoo tib yam: ntuj granite, cam khwb cia hlau, lossis hauv xyoo tas los no ntxhia casting. Cov ntaub ntawv no tseem yog lub hauv paus ntawm kev lag luam, thiab lawv yuav nyob li ntawd. Tab sis taug kev los ntawm cov chav tsev ntawm kev ua lag luam metrology niaj hnub no thiab koj yuav pom qee yam tshiab: carbon fiber beams ntawm siab -ceev CMMs, thiab thaum ntxov- theem sim ntawm ultra-kev ua haujlwm siab ua vaj tse (UHPC) hauv lub hauv paus tshuab. Ob qho tib si cov ntaub ntawv hais txog qhov tsis muaj zog uas cov kev xaiv ib txwm muaj kev tawm tsam kom kov yeej, thiab ob qho tib si tau txav los ntawm kev xav paub hauv chav kuaj mus rau kev tsim khoom lag luam.
Kab lus no saib qhov twg ob cov ntaub ntawv tawm tshiab no haum, qhov lawv muab tiag tiag, lawv cov kev txwv yog dab tsi, thiab cov cuab yeej tsim khoom thiab cov neeg siv kawg yuav tsum xav txog lawv li cas. Lub hom phiaj tsis yog los kwv yees qhov kawg ntawm granite, uas tseem tsis muaj qhov sib npaug li qhov chaw siv, tab sis muab kev tsim vaj tsev thiab kev yuav cov pab pawg kom pom tseeb - qhov muag pom ntawm cov tiam tom ntej ntawm ultra- cov qauv raug.
Yog vim li cas kev lag luam tab tom nrhiav cov khoom siv tshiab
Peb qhov kev xav tau thawb cov neeg tsim khoom siv tshaj li cov khoom siv ib txwm siv.
Ua ntej, cov tshuab tau nrawm dua. Siab -Sceev scanning CMMs, gantry systems nrog acceleration saum ib g, thiab inline soj ntsuam cov cuab yeej kev koom ua ke rau hauv ntau lawm kab tag nrho xav tau tsiv masses uas yog ib txhij lub teeb, tawv thiab zoo damped. Lub granite crossbeam muab kev ruaj ntseg thiab damping, tab sis nws qhov ceev (nyob ib ncig ntawm 3,000 kg / m3) txwv ceev npaum li cas nws yuav tsum tau ceev, thiab txhua txhua kilogram ntxiv rau ntawm ntsug axis nqi tsav lub hwj chim, bearing lub neej thiab ntsuas ceev.
Qhov thib ob, thermal tswj tau dhau los ua qhov yuam kev tseem ceeb. Raws li qhov teeb meem geometric raug tsim los mus rau qib -micron, thermal drift tam sim no suav rau feem ntau ntawm tag nrho cov kev tsis paub tseeb hauv ntau qhov kev teeb tsa. Cov ntaub ntawv uas tsis tshua muaj thermal expansion thiab thermal conductivity tsawg yog tsim nyog rau lawv qhov hnyav hauv qhov tseeb.
Thib peb, cov hauv paus ntsiab lus raug hais kom ua ntau dua. Niaj hnub nimno precision machinery chaw ua si, lithography cleanrooms thiab metrology labs feem ntau ua nyob rau hauv pem teb sab sauv los yog cov av tsis zoo, qhov twg cov pa ua vaj tse slabs tsis tuaj yeem xa cov kev ruaj ntseg uas vibration - cov khoom siv xav tau.
Cov pa roj carbon fiber ntau thiab UHPC teb ncaj qha rau peb lub zog no, hauv cov qauv txav thiab hauv lub hauv paus feem.
Carbon Fiber Precision Beams: Lub teeb, tawv, thiab thermally ntsiag to
Carbon fiber reinforced polymer (CFRP) tau siv nyob rau hauv aerospace ntau xyoo lawm, thiab hwm CMM hom twb tau txais nws rau gantry beams thiab Z-axis spindles. Qhov kev thov rov hais dua yog ncaj nraim thaum koj sib piv cov lej.
- Tshwj xeeb nruj: carbon fiber composites ncav cuag ib tug nruj - mus rau - luj piv kwv yees li peb mus rau tsib lub sij hawm siab tshaj hlau los yog granite, vim hais tias lawv ceev tsuas yog hais txog 1,600 kg / m3 thaum unidirectional laminates ua tau elastic moduli saum toj no 150 GPa
- Thermal expansion: txheem modulus fibers nthuav dav ze xoom, thiab tshwj xeeb xaiv fiber ntau sib xyaw tuaj yeem tsim kom muaj qhov sib npaug ntawm thermal expansion ze rau 0.0000006 ib Kelvin, qhov tseem ceeb tsis muaj qhov ntsuas kub ntawm qhov ntsuas kub.
- Damping: polymer matrices dissipate kev co zoo dua li cov hlau, txo cov sij hawm daws teeb meem tom qab txav ceev
- Tsim kev ywj pheej: lub nqaj yog nteg thiab kho raws li ib tug hollow kem los yog airfoil seem, yog li tav thiab phab ntsa thicknesses mus raws nraim qhov kev nruj kev soj ntsuam hais tias lawv yuav tsum.
Hauv kev xyaum, acarbon fiber precision nqajtso cai rau CMM gantry kom nrawm nrawm dua thiab kho sai dua yam tsis ntxiv qhov ntsuas qhov tsis meej. Cov neeg tsim khoom tshaj tawm kev txhim kho kev nrawm ntawm 30 mus rau 50 feem pua ntawm cov pa roj carbon- cov cav tov piv nrog cov qauv sib npaug granite beam, nrog rau kev txo qis tsav. Rau ntsug spindles, qhov hnyav qis heev txo cov load ntawm Z-tsav, txhim kho ob qho tib si lub neej ntev thiab kev tshawb nrhiav qhov tseeb.
Cov Kev Cai Ncaj Ncees ntawm Carbon Fiber
Cov khoom lag luam zoo li yuav muag cov khoom sib xyaw, yog li ntawm no yog lwm sab ntawm daim ntawv teev npe. Cov kab hluav taws xob carbon fiber ntau yog kim, feem ntau ntau zaus tus nqi ntawm granite sib npaug, vim tias autoclave lossis siab - kub curing thiab precision tooling yog yam tsis muaj kev zam. Lawv qhov kev ruaj ntseg nyob ntawm qhov tsim laminate: noo noo nqus thiab hygrothermal aging yuav tsum tau tsim tawm nrog cov qauv fiber ntau thiab kev xaiv cob. Thiab tseem ceeb, carbon fiber tsis tuaj yeem lapped. Nws tsis tuaj yeem muab qhov chaw ua haujlwm ntawm granite phaj, uas yog vim li cas kev lag luam tsim yuav luag ib txwm ua ke CFRP nqaj nrog granite lossis ceramic qhia thiab siv ntsej muag. Carbon fiber hloov cov qauv txav, tsis yog tus qauv siv.
UHPC: Rethinking the Foundation Layer
Ultra-kev ua tau zoo ua vaj tse yog ib yam tshiab ntawm cov neeg tuaj tshiab. Hloov chaw ntawm kev sib tw nrog granite ntawm qhov chaw ua haujlwm, UHPC tsom rau txheej hauv qab: lub hauv paus tshuab, plinths thiab inertia blocks.
UHPC yog cov cementitious composite nrog densely packed gradient ntawm aggregates thiab fibers, ua tiav compressive zog siab tshaj 120 MPa (ntau tshaj peb zaug zoo tib yam structural qhob) thiab ua rau qis porosity. Rau kev siv precision nws cov khoom muaj feem xyuam yog:
- Qhov loj heev ntawm tus nqi qis ib tuj, uas yog raws nraim li qhov inertia bases xav tau
- Damping tus cwj pwm zoo dua li cov pob zeb zoo tib yam thiab sib piv hauv cov khoom siv tau zoo rau cov pob zeb hauv av casting
- Tsawg shrinkage tom qab kho, tso cai rau lub hauv paus loj monolithic los cam khwb cia nrog geometry
- Steel fiber reinforcement uas muab cov khoom txaus tensile zog kom ciaj sia tuav thiab thauj tog rau nkoj loads
Cov pab pawg tshawb fawb thiab cov cuab yeej siv tshuab tau sim nrog UHPC tshuab txaj tau ntau xyoo, thiab cov txiaj ntsig tau lees paub txaus tias ob peb lub tshuab sib tsoo thiab tshuab ua haujlwm tam sim no xa cov tshuab nrog polymer- hloov kho lossis UHPC- hom txaj. Nyob rau hauv precision metrology, cov qauv tshwm sim yog ib txheej txheej architecture: UHPC lub hauv paus thaiv ntawm kev sib cais, lub granite platform saum nws, thiab carbon fiber los yog ntxhia casting nyob rau hauv lub ceev tshaj plaws txav axes. Qhov no yog tib yam engineering logic tom qab txhua qhov pov thawjUHPC precisionqauv: txhua yam khoom siv ua haujlwm nws zoo tshaj plaws ntawm, thiab qhov system ua tau zoo dua ib qho -cov khoom tsim.
Dab tsi UHPC hloov tsis tau
UHPC qhov chaw tsis tuaj yeem lapped rau metrology flatness, thiab lawv qhov ruaj khov nyob rau ntau xyoo tseem muaj cov ntaub ntawv luv luv dua li granite. Ambient kub swings txav UHPC ntsuas ntau tshaj granite. Nws yog lub hauv paus thiab cov khoom siv ntau yam, tsis yog siv qhov chaw. Txhua tus neeg thov kom tshuab precision mounting nta ncaj qha rau hauv UHPC yuav tsum npaj rau embedded steel los yog ceramic inserts, raws nraim li ntxhia casting niaj hnub no.
Yuav Ua Li Cas Cov Khoom Siv Tshiab Sib Piv Nrog Cov Tsim Tsim
| Khoom | Granite | Mineral Casting | Cov pa roj carbon fiber | UHPC |
|---|---|---|---|---|
| Qhov ceev (kg / m3) | Kwv yees li 3,000 | Txog 2,400 | Txog 1,600 | Txog 2,400 |
| Tshwj xeeb nruj | Siab | Nruab nrab | Siab heev | Nruab nrab |
| Damping | Zoo | Zoo heev | Zoo | Zoo heev |
| Thermal expansion | Tsawg heev | Tsawg | Zero | Nruab nrab |
| Lappable siv nto | Yog lawm | Tsis muaj | Tsis muaj | Tsis muaj |
| Tus nqi txheeb ze rau ib chav nyob nruj | Nruab nrab | Nruab nrab | Siab | Tsawg |
| Lub luag haujlwm zoo tshaj plaws | Reference rooj, bases | Tshuab txaj, substructures | Fast txav beams, spindles | Foundations, inertia blocks |
Lub rooj ua kom pom cov duab zoo meej: cov ntaub ntawv no yog cov khoom ntxiv, tsis yog cov neeg sib tw. Lub tshuab yeej kev tsim qauv ntawm kaum xyoo tom ntej yuav txheej lawv los ntawm kev ua haujlwm.
Qhov no txhais tau li cas rau cov neeg yuav khoom
Yog tias koj yuav lossis qhia meej cov cav tov precision, cov khoom siv tshiab nthwv dej hloov peb qhov kev sib tham.
Ua ntej, nug cov neeg tsim tshuab seb lawv cov kab txav txav yog ua los ntawm. Yog tias cov khoom tseem ceeb rau koj, cov pa roj carbon fiber ntau lossis hybrid beam yuav them rau nws tus kheej hauv scanning ceev thiab txo lub sij hawm voj voog, tshwj xeeb tshaj yog nyob rau gantry CMMs thiab inline systems.
Qhov thib ob, kho lub hauv paus ua ib feem ntawm lub tshuab. Thaum txhim kho hnyav lossis kev vibration- cov khoom siv rhiab heev, sib tham txog UHPC lossis cov pob zeb hauv av casting inertia nrog koj tus neeg muag khoom es tsis txhob ua rau lub plinth pob zeb. Tus nqi nce ntxiv yog me me piv rau lub tshuab, thiab cov txiaj ntsig kev sib cais yog loj.
Thib peb, ua haujlwm nrog cov neeg muag khoom uas nkag siab tag nrho pawg. Ib tus neeg muag khoom uas tsim cov granite platforms, ntxhia casting qauv thiab precision ceramics, thiab leej twg muab thiab tswj nws tus kheej cov khoom siv raw, tuaj yeem tsim cov kev sib tshuam ntawm cov txheej txheem no kom raug, los ntawm cov khoom siv ntxig rau thermal cais qhov khoob, tsis yog muag koj ib yam khoom thiab cia siab tias qhov seem ua haujlwm.
Cov lus nug nquag
Puas yuav carbon fiber hloov granite hauv CMMs?
Tsis yog, tsis yog nyob rau yav tom ntej. Cov pa roj carbon fiber yog hloov granite nyob rau hauv cov kab teeb thiab spindles qhov twg cov huab hwm coj tsawg tseem ceeb tshaj plaws, thaum granite tseem yog cov khoom ntawm kev xaiv rau cov ntxhuav, siv qhov chaw thiab cov qauv hauv paus. Feem ntau cov tshuab siab heev tam sim no siv ob qho tib si.
Puas yog UHPC haum rau lub tshuab cuab yeej txaj, tsis yog lub hauv paus?
Yog lawm, thiab ob peb lub tshuab tsim cov cuab yeej twb xa cov tshuab sib tsoo nrog UHPC- hom txaj. Cov caveats yog embedded inserts rau tag nrho cov mounting nta thiab ceev faj kev tswj. Rau precision metrology nto, granite los yog ntxhia casting ntawm UHPC lub hauv paus tseem yog cov tswv yim ntau dua niaj hnub no.
Yuav ua li cas ruaj khov carbon fiber ntau xyoo ntawm kev siv?
Zoo-tsim aerospace- qib laminates nrog qis-cov dej ntub dej thiab cov khoom siv fiber ntau sib npaug tuav lawv cov geometry ntau xyoo ntawm kev pabcuam. Qhov kev pheej hmoo yog nyob rau hauv pheej yig laminate designs nrog unbalanced layups, uas muaj peev xwm warp nrog humidity hloov. Qhov no yog vim li cas nws thiaj li tseem ceeb rau kev yuav cov qauv sib xyaw los ntawm cov chaw muag khoom nrog aerospace- qib kev tswj hwm, lossis kom lo nrog cov khoom pov thawj tshuab.
Kuv yuav tsum nug dab tsi thaum qhia txog cov qauv hybrid precision?
Nug kom tiav cov peev nyiaj yuam kev: geometric raug ntawm txhua qhov lapped nto, thermal expansion cov ntaub ntawv rau txhua txheej txheej txheej, kev vibration transmissibility ntawm lub hauv paus system, thiab cov ntaub ntawv cov ntaub ntawv tom qab txhua daim ntawv thov. Lub tuam txhab muaj peev xwm yuav teb nrog cov lej thiab cov qauv, tsis yog cov npe.
Lo lus kawg
Cov pa roj carbon fiber ntau thiab UHPC lub hauv paus tsis yog lub kiv puag ncig uas cheb granite ib sab. Lawv yog cov khaubncaws sab nraud povtseg hauv cov khoom siv uas granite tau pib. Cov tshuab tau nrawm dua nrog cov pa roj carbon fiber ntau qhov tseem ceeb, ruaj khov dua nrog UHPC qhov xav tau loj dua, thiab muaj tseeb dua nrog granite qhov chaw siv qhov chaw nyob. Cov tuam txhab lag luam uas paub txog tag nrho cov ntaub ntawv no, thiab paub tias txhua tus nyob qhov twg, yuav txhais cov tiam tom ntej ntawm ultra- cov cuab yeej precision.
Raws li cov chaw tsim khoom hauv paus hauv ntuj granite nrog nws tus kheej cov chaw txua txiag zeb, thiab nrog cov kab loj hlob hauv cov ntxhia casting thiab precision ceramics, peb saib thiab txais cov thev naus laus zis tshiab no los ntawm engineering- thawj qhov kev xav. Yog tias koj tab tom npaj lub tshuab precision tshiab lossis chav kuaj thiab xav tau qhov kev ntsuam xyuas ncaj ncees ntawm cov khoom siv nyob qhov twg hauv koj cov qauv, xa peb koj qhov kev teeb tsa thiab cov khoom thauj rau kev tshuaj xyuas.