Hauv CNC cov cuab yeej tswj cov lej, txawm hais tias lub cev muaj zog ntawm granite muab lub hauv paus rau kev ua haujlwm siab, nws qhov kev tsis txaus ntseeg tuaj yeem muaj ntau qhov cuam tshuam rau kev ua tiav, uas tau qhia tshwj xeeb hauv qab no:
1. Qhov chaw tsis zoo hauv kev ua haujlwm los ntawm cov khoom siv brittleness
Lub nkig ntawm granite (siab compressive zog tab sis tsis tshua muaj zog flexural, feem ntau lub zog flexural tsuas yog 1/10 txog 1/20 ntawm lub zog compressive) ua rau nws muaj teeb meem xws li ntug tawg thiab nto microcracks thaum ua.
Microscopic defects cuam tshuam rau kev hloov pauv hloov pauv: Thaum ua qhov kev sib tsoo siab lossis milling, cov kab nrib pleb me me ntawm cov cuab yeej sib txuas tuaj yeem tsim qhov tsis sib xws, ua rau qhov tsis ncaj ncees ntawm cov khoom tseem ceeb xws li cov lus qhia thiab cov rooj ua haujlwm kom nthuav dav (piv txwv li, flatness deteriorates los ntawm qhov zoo tshaj ± 1μm / m rau ± 3 m). Cov kab mob microscopic no yuav raug xa ncaj qha mus rau cov khoom ua tiav, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej xws li precision optical Cheebtsam thiab semiconductor wafer nqa, uas yuav ua rau kom nce qhov roughness ntawm lub workpiece (Ra tus nqi nce ntawm 0.1μm mus rau ntau tshaj 0.5μm), cuam tshuam rau kev ua haujlwm kho qhov muag lossis kev ua haujlwm ntawm cov khoom siv.
Sudden fracture risk nyob rau hauv dynamic ua: nyob rau hauv cov xwm txheej ntawm high-ceev txiav (xws li spindle ceev> 15,000 r / min) los yog pub tus nqi> 20m / min, granite Cheebtsam tej zaum yuav muaj kev fragmentation nyob rau hauv lub zos fragmentation vim instantaneous impact rog. Piv txwv li, thaum cov kev taw qhia kev tsheb ciav hlau hloov pauv kev taw qhia sai, ntug tawg tuaj yeem ua rau txoj kev txav mus los ntawm txoj kev theoretical, uas ua rau poob qis hauv qhov chaw raug (qhov kev ua yuam kev nthuav dav los ntawm ± 2μm mus rau ntau dua ± 10μm), thiab txawm tias ua rau cov cuab yeej sib tsoo thiab khawb.
Qhov thib ob, dynamic qhov tseeb poob los ntawm qhov tsis sib xws ntawm qhov hnyav thiab nruj
Lub siab-ceev cov cuab yeej ntawm granite (nrog lub ntom ntom (nrog 3.0g / cm³) tuaj yeem tsim kev co, tab sis nws kuj coj cov teeb meem hauv qab no:
Inertial quab yuam ua rau servo teb lag: Lub inertial quab yuam generated los ntawm hnyav granite txaj (xws li loj gantry tshuab txaj uas muaj peev xwm hnyav kaum tawm tons) thaum acceleration thiab deceleration quab yuam lub servo lub cev muaj zog tso zis ntau dua torque, uas ua rau ib tug nce nyob rau hauv txoj hauj lwm voj nrhiav yuam kev. Piv txwv li, nyob rau hauv high-speed systems uas tau tsav los ntawm linear motors, rau txhua txhua 10% nce nyob rau hauv qhov hnyav, qhov chaw qhov tseeb yuav txo los ntawm 5% mus rau 8%. Tshwj xeeb tshaj yog nyob rau hauv nanoscale ua scenarios, qhov lag luam no tuaj yeem ua rau kev ua haujlwm tsis raug (xws li qhov yuam kev roundness nce los ntawm 50nm mus rau 200nm thaum lub voj voog ncig).
Tsis txaus rigidity ua rau tsawg zaus vibration: Txawm hais tias granite muaj ib tug kuj siab inherent damping, nws elastic modulus (kwv yees li 60 mus rau 120GPa) yog qis dua cov cam khwb cia hlau. Thaum raug hloov pauv (xws li kev hloov pauv hauv kev txiav quab yuam thaum ua haujlwm ntau axis txuas), micro-deformation tsub zuj zuj tuaj yeem tshwm sim. Piv txwv li, nyob rau hauv lub viav vias lub taub hau tivthaiv ntawm ib tug tsib-axis machining chaw, me ntsis elastic deformation ntawm lub granite puag yuav ua rau lub angular positioning raug ntawm cov kev sib hloov axis mus drift (xws li indexing yuam kev expanding ntawm ± 5 "mus rau ± 15"), cuam tshuam lub machining raug.
Iii. Kev txwv ntawm Thermal Stability thiab Environmental Sensitivity
Txawm hais tias tus coefficient ntawm thermal expansion ntawm granite (kwv yees li 5 mus rau 9 × 10⁻⁶ / ℃) yog qis dua li cov hlau cam khwb cia, nws tseem yuav ua yuam kev hauv precision ua:
Kub gradients ua rau cov qauv deformation: Thaum cov cuab yeej ua haujlwm tsis tu ncua rau lub sijhawm ntev, cov khoom siv cua sov xws li lub ntsiab ncej lub cev muaj zog thiab cov lus qhia kev tsheb ciav hlau tuaj yeem ua rau kub gradients hauv cov khoom granite. Piv txwv li, thaum qhov sib txawv ntawm qhov kub thiab txias ntawm qhov chaw ua haujlwm yog 2 ℃, nws tuaj yeem ua rau nruab nrab convex lossis mid-concave deformation (deflection tuaj yeem ncav cuag 10 mus rau 20μm), ua rau tsis ua haujlwm ntawm flatness ntawm workpiece clamping thiab cuam tshuam rau qhov sib npaug ntawm qhov tseeb ntawm milling lossis sib tsoo cov thickness ntau tshaj ± 5. ± 20μm).
Ib puag ncig cov av noo ua rau me ntsis nthuav dav: Txawm hais tias qhov nqus dej ntawm granite (0.1% mus rau 0.5%) yog qhov tsawg, thaum siv rau lub sijhawm ntev nyob rau hauv qhov chaw siab, qhov dej nqus dej tuaj yeem ua rau lattice expansion, uas nyob rau hauv lem ua rau kev hloov ntawm qhov haum clearance ntawm cov ntaub ntawv rail khub. Piv txwv li, thaum cov av noo nce los ntawm 40% RH mus rau 70% RH, linear dimension ntawm granite qhia rail yuav nce los ntawm 0.005 mus rau 0.01mm / m, uas ua rau ib tug txo nyob rau hauv lub smoothness ntawm zawv zawg qhia rail txoj kev txav thiab tshwm sim ntawm ib tug "crawling" phenomenon, uas cuam tshuam rau microcurnacy.
Iv. Cov teebmeem ntawm kev ua haujlwm thiab kev sib dhos yuam kev
Kev ua haujlwm nyuaj ntawm granite yog siab (yuav tsum tau cov cuab yeej tshwj xeeb pob zeb diamond, thiab kev ua haujlwm tsuas yog 1/3 txog 1/2 ntawm cov ntaub ntawv hlau), uas tuaj yeem ua rau poob ntawm qhov tseeb hauv cov txheej txheem sib dhos:
Kev ua yuam kev sib kis ntawm qhov chaw sib tw: Yog tias muaj kev sib txawv ntawm kev ua haujlwm (xws li flatness> 5μm, qhov sib txawv qhov yuam kev> 10μm) hauv qhov tseem ceeb xws li cov lus qhia kev tsheb ciav hlau thiab cov hlau lead ntsia hlau, nws yuav ua rau muaj kev cuam tshuam ntawm cov kab qhia kev tsheb nqaj hlau tom qab kev teeb tsa, tsis sib xws preload ntawm lub pob ntsia hlau, thiab qhov kawg ua rau deformation. Piv txwv li, thaum lub sij hawm peb-axis linkage ua, qhov verticality yuam kev tshwm sim los ntawm distortion ntawm cov kev taw qhia rail yuav nthuav dav kab pheeb ces kaum qhov yuam kev ntawm lub voos xwmfab ntawm ± 10μm mus rau ± 50μm.
Interface sib txawv ntawm cov qauv spliced: Granite Cheebtsam ntawm cov khoom loj feem ntau siv cov txheej txheem splicing (xws li multi-section txaj splicing). Yog tias muaj qhov ua yuam kev me me (> 10 ") lossis nto roughness> Ra0.8μm ntawm qhov sib txuas, kev ntxhov siab los yog qhov khoob yuav tshwm sim tom qab sib dhos.
Summary and coping inspirations
Qhov tsis zoo ntawm granite muaj qhov zais cia, sib sau ua ke thiab ib puag ncig rhiab cuam tshuam rau qhov raug ntawm CNC khoom, thiab yuav tsum tau ua raws li cov txheej txheem xws li kev hloov kho cov khoom siv (xws li resin impregnation los txhim kho toughness), kev ua kom zoo dua qub (xws li hlau-granite composite thav duab), thermal tswj technology (xws li microchannel dej txias (xws li lub sij hawm ua kom sov) interferometer). Hauv kev ua haujlwm ntawm nanoscale precision ua, nws yog qhov tsim nyog yuav tsum tau ua kom tiav cov saw hlau los ntawm kev xaiv cov khoom siv, ua cov cuab yeej siv rau tag nrho lub tshuab kom ua tiav cov txiaj ntsig kev ua tau zoo ntawm granite thaum zam nws qhov tsis xws luag.
Post lub sij hawm: May-24-2025