Hauv lub Hoobkas uas tsim cov khoom siv precision, lub XYZ precision gantry frame zoo li "super plotter", uas muaj peev xwm txav tau meej ntawm micrometer lossis txawm tias nanometer scale. Lub hauv paus granite yog "lub rooj ruaj khov" uas txhawb nqa "plotter" no. Puas yog lawv "ua haujlwm sib haum xeeb zoo meej" thaum ua ke? Hnub no, cia peb tshawb nrhiav qhov tsis paub meej sab hauv.
Vim li cas lawv thiaj hais tias yog "kev sib phim zoo meej"?
Granite tsis yog pob zeb ib txwm muaj. Nws zoo li "tus tub rog hexagonal" hauv ntiaj teb cov khoom siv:
Muaj peev xwm nqus tau qhov kev co zoo heev: Granite muaj qhov ceev heev, thiab nws cov qauv sab hauv zoo li "kev sib dhos nruj". Thaum lub thav duab gantry txav mus sai thiab co (ib yam li nws co thaum nres tam sim ntawd thaum khiav), granite tuaj yeem nqus tau ntau dua 90% ntawm lub zog co, ua rau lub thav duab gantry "sawv ruaj khov" sai sai. Piv txwv li, thaum sib tsoo cov iav tsom iav, tom qab siv lub hauv paus granite, qhov kev co ntawm lub thav duab gantry tau txo qis los ntawm 15 microns mus rau 3 microns, thiab qhov tseeb ntawm cov iav tau zoo dua heev.
Tsis ntshai qhov kub thiab txias "cuam tshuam": Lub thav duab gantry yuav kub tom qab ua haujlwm ntev. Cov ntaub ntawv ib txwm yuav "nthuav dav thiab deform" thaum cua sov, tab sis qhov thermal expansion coefficient ntawm granite tsuas yog ib feem tsib ntawm cov hlau! Txawm tias qhov kub hauv lub chaw ua haujlwm hloov pauv los ntawm 10 ℃ hauv ib hnub, nws qhov deformation yuav luag tsis quav ntsej. Nws tuaj yeem txhawb nqa lub thav duab gantry thiab xyuas kom meej tias qhov yuam kev tso chaw tsis pub tshaj 2 microns.
Puas yog lawv yuav "muaj kev tsis sib haum xeeb" thiab? Cov teeb meem no yuav tsum tau sau tseg!
Txawm hais tias lawv "sib haum xeeb heev", yog tias tsis tau npaj zoo thaum ntxov, "kev tsis sib haum xeeb nrog ib puag ncig hauv zos" kuj tseem yuav tshwm sim:
Qhov txaj muag ntawm "interfaces tsis sib xws"
Cov sliders thiab cov guide rails ntawm lub gantry frame yuav tsum tau muab ntsia kom meej rau hauv cov qhov ntawm lub hauv paus. Yog tias qhov sib txawv ntawm cov qhov ntawm lub hauv paus tshaj 0.01 millimeters (nyias dua li cov plaub hau tib neeg), lub gantry frame yuav raug tilted thaum ntsia thiab daig thaum txav mus. Ib yam li thaum cov pob qij txha ntawm lub jigsaw puzzle tsis sib xws, txawm tias koj sim ua li cas los xij, nws yuav tsis ua haujlwm.
Qhov txaus ntshai zais ntawm "qhov hnyav tsis sib xws"
Cov ncej gantry loj yog hnyav thiab "muaj zog". Yog tias lub hauv paus granite tsis khov txaus (nrog lub zog compressive qis dua 120 megapascals), nws yuav tawg thaum muaj kev nyuaj siab ntev. Qhov no zoo li txhawb lub pob zeb loj nrog cov ceg me me. Sai dua lossis tom qab, nws yuav tawg.
Qhov teeb meem ntawm "asynchronous thermal expansion thiab contraction"
Qhov sib txawv ntawm qhov uas cov hlau gantry thav duab thiab granite nthuav dav thaum raug cua sov. Hauv ib puag ncig uas muaj qhov kub sib txawv loj, ob qho tib si yuav "sib tw" ua rau muaj kev ntxhov siab, ua rau cov khoom siv tsis ruaj khov, ib yam li cov khoom ua los ntawm cov khoom sib txawv "mus lawv txoj kev" ntawm qhov kub siab.
Yuav ua li cas kom lawv "koom tes zoo kawg nkaus"?
Tsis txhob txhawj. Muaj cov kev daws teeb meem rau cov teeb meem no:
Lub hauv paus tsim tshwj xeeb: Ntsuas qhov hnyav ntawm lub thav duab gantry, qhov chaw teeb tsa thiab lwm cov ntaub ntawv ua ntej, thiab cia cov chaw tsim khoom kho lub hauv paus tshwj xeeb kom ntseeg tau tias qhov yuam kev ntawm txhua qhov chaw tsis pub tshaj 0.005 millimeters.
Ua kom lub hauv paus ruaj khov thiab txhim kho dua tshiab: Xaiv cov granite uas muaj zog compressive ntau dua (≥150 megapascals), thiab tsim cov qauv honeycomb hauv lub hauv paus, zoo li lub zes ntawm muv, uas tsis yog tsuas yog txo qhov hnyav xwb tab sis kuj txhim kho lub peev xwm thauj khoom.
Nruab "Tus Saib Xyuas Kub": Ntxiv ib txheej ntawm cov gasket ywj pheej ntawm lub hauv paus thiab lub thav duab gantry kom nqus tau kev ntxhov siab thermal; Los yog nruab cov kav dej txias kom tswj tau qhov kub thiab txias hauv 1 ℃.
Lub sijhawm tshaj tawm: Lub Rau Hli-17-2025