Kev xaiv ntawm qhov tsim nyog tshaj plaws granite-raws li linear tsab ntawv tsa suab platform rau ib daim ntawv thov yog nyob ntawm tus tswv tsev ntawm ntau yam thiab qhov sib txawv.Nws yog ib qho tseem ceeb kom paub tias txhua daim ntawv thov muaj nws tus kheej tshwj xeeb ntawm cov kev cai uas yuav tsum tau nkag siab thiab ua ntej txhawm rau txhawm rau nrhiav kev daws teeb meem zoo nyob rau hauv cov nqe lus ntawm cov lus tsa suab.
Ib qho ntawm cov kev daws teeb meem ntau tshaj plaws suav nrog mounting discrete positioning theem mus rau cov qauv granite.Lwm qhov kev daws teeb meem sib xyaw ua ke cov khoom sib xyaw uas suav nrog cov axes ntawm kev txav ncaj qha rau hauv granite nws tus kheej.Kev xaiv ntawm theem-on-granite thiab kev sib koom ua ke-granite motion (IGM) platform yog ib qho kev txiav txim siab ua ntej yuav tsum tau ua hauv cov txheej txheem xaiv.Muaj qhov sib txawv meej ntawm ob hom kev daws teeb meem, thiab tau kawg txhua tus muaj nws tus kheej qhov zoo - thiab cov lus ceeb toom - uas yuav tsum tau ua tib zoo nkag siab thiab txiav txim siab.
Txhawm rau muab kev nkag siab zoo dua rau cov txheej txheem txiav txim siab no, peb ntsuas qhov sib txawv ntawm ob lub hauv paus kev tawm suab platform tsim - ib qho kev daws teeb meem-on-granite, thiab kev daws teeb meem IGM - los ntawm ob qho tib si kev txawj thiab nyiaj txiag kev xav hauv daim ntawv ntawm kev siv tshuab- bearing case study.
Keeb kwm
Txhawm rau tshawb nrhiav qhov zoo sib xws thiab qhov sib txawv ntawm IGM systems thiab tsoos theem-on-granite systems, peb tsim ob qhov kev sim-cov ntaub ntawv tsim:
- Mechanical bearing, theem-on-granite
- Mechanical bearing, IGM
Hauv ob qho tib si, txhua qhov system muaj peb axes ntawm kev txav.Lub Y axis muaj 1000 hli ntawm kev mus ncig thiab nyob ntawm lub hauv paus ntawm cov qauv granite.Lub X axis, nyob rau ntawm tus choj ntawm lub rooj sib txoos nrog 400 hli ntawm kev mus ncig, nqa lub ntsug Z-axis nrog 100 hli ntawm kev mus ncig.Qhov kev npaj no yog sawv cev pictographically.
Rau cov theem-on-granite tsim, peb xaiv PRO560LM dav-lub cev theem rau Y axis vim nws lub peev xwm thauj khoom loj dua, feem ntau rau ntau daim ntawv thov siv qhov "Y / XZ split-bridge" kev npaj.Rau X axis, peb xaiv PRO280LM, uas feem ntau siv los ua tus choj axis hauv ntau daim ntawv thov.PRO280LM muaj qhov ua tau zoo ntawm nws cov hneev taw thiab nws lub peev xwm nqa Z axis nrog cov neeg siv khoom them nyiaj.
Rau cov IGM tsim, peb ze ze replicated lub hauv paus ntsiab lus tsim thiab layouts ntawm cov saum toj no axes, nrog rau cov thawj qhov sib txawv yog hais tias lub IGM axes yog tsim ncaj qha mus rau hauv lub granite qauv, thiab yog li ntawd tsis muaj machined-component bases tam sim no nyob rau hauv lub theem-on. - granite designs.
Feem ntau hauv ob qho kev tsim qauv yog Z axis, uas tau xaiv los ua PRO190SL pob-ntsia hlau-tsav theem.Qhov no yog qhov nrov heev axis siv nyob rau hauv txoj kab ntsug ntsug ntawm tus choj vim tias nws lub peev xwm them nyiaj siab dav thiab cov qauv sib txuam.
Daim duab 2 qhia txog qhov tshwj xeeb theem-on-granite thiab IGM systems kawm.
Kev sib piv
IGM systems yog tsim los siv ntau yam txuj ci thiab cov khoom siv uas zoo ib yam li cov uas muaj nyob hauv cov qauv tsim-on-granite.Raws li qhov tshwm sim, muaj ntau yam khoom siv hauv kev sib koom ntawm IGM systems thiab theem-on-granite systems.Hloov pauv, kev sib koom ua ke ntawm cov axes ntawm cov lus tsa suab ncaj qha rau hauv cov qauv granite muaj ntau qhov sib txawv ntawm cov yam ntxwv uas sib txawv IGM systems los ntawm theem-on-granite systems.
Form Factor
Tej zaum qhov zoo sib xws feem ntau pib nrog lub tshuab lub hauv paus - granite.Txawm hais tias muaj qhov sib txawv ntawm cov yam ntxwv thiab kev zam ntawm theem-on-granite thiab IGM tsim, tag nrho qhov ntev ntawm granite puag, risers thiab choj yog sib npaug.Qhov no feem ntau yog vim qhov nominal thiab txwv kev mus ncig yog zoo ib yam ntawm theem-on-granite thiab IGM.
Kev tsim kho
Qhov tsis muaj machined-cov ntsiab lus axis hauv paus hauv IGM tsim muab qee qhov zoo dua cov kev daws teeb meem-on-granite.Tshwj xeeb, qhov txo qis ntawm cov khoom hauv IGM lub voj voog kev ua haujlwm pab ua kom tag nrho cov axis nruj.Nws kuj tseem tso cai rau luv luv ntawm lub hauv paus granite thiab sab saum toj ntawm lub tsheb thauj khoom.Hauv qhov kev kawm tshwj xeeb no, IGM tsim muaj 33% qis ua haujlwm qhov siab (80 hli piv rau 120 hli).Tsis tsuas yog qhov kev ua haujlwm me me no tso cai rau kev tsim ntau dua, tab sis kuj tseem txo cov tshuab offsets los ntawm lub cev muaj zog thiab encoder mus rau qhov chaw ua haujlwm, ua rau txo qis Abbe yuam kev thiab yog li txhim kho qhov chaw ua haujlwm ntawm qhov chaw ua haujlwm.
Axis Cheebtsam
Saib tob rau hauv kev tsim, theem-on-granite thiab IGM cov kev daws teeb meem qhia qee yam tseem ceeb, xws li linear motors thiab position encoders.Common force thiab magnet track xaiv ua rau sib npaug zog-tso peev xwm.Ib yam li ntawd, siv tib lub encoders nyob rau hauv ob qho tib si tsim muab kev daws teeb meem zoo tib yam rau kev tso tawm tswv yim.Yog li ntawd, qhov tseeb linear raug thiab rov ua tau zoo dua tsis sib txawv ntawm theem-on-granite thiab IGM kev daws teeb meem.Cov txheej txheem zoo sib xws, suav nrog kev sib cais thiab kev ua siab ntev, ua rau kev ua tau zoo sib xws hauv cov ntsiab lus ntawm geometric yuam kev motions (ie, kab rov tav thiab ntsug ncaj, suab, yob thiab yaw).Thaum kawg, ob qho tib si tsim cov ntsiab lus txhawb nqa, suav nrog kev tswj hwm cable, kev txwv hluav taws xob thiab kev ua haujlwm nyuaj, yog qhov zoo ib yam hauv kev ua haujlwm, txawm hais tias lawv yuav txawv me ntsis ntawm lub cev.
Cov kabmob
Rau qhov kev tsim tshwj xeeb no, ib qho ntawm qhov sib txawv tseem ceeb tshaj plaws yog kev xaiv cov kab qhia kev coj ua.Txawm hais tias recirculating pob bearings yog siv nyob rau hauv ob qho tib si theem-on-granite thiab IGM systems, lub IGM system ua rau nws muaj peev xwm mus sib sau ua ke loj, stiffer bearings rau hauv tus tsim yam tsis tau nce lub axis ua hauj lwm qhov siab.Vim tias tus qauv IGM tso siab rau granite raws li nws lub hauv paus, tsis zoo li lub hauv paus ntawm cov khoom sib cais, nws muaj peev xwm rov qab tau qee qhov ntawm cov vaj tse ntsug uas yuav txwv tsis pub noj los ntawm lub hauv paus machined, thiab qhov tseem ceeb sau qhov chaw loj dua. bearings thaum tseem txo qhov siab tag nrho cov carriage saum toj no granite.
Kev nruj
Kev siv cov kabmob loj dua hauv IGM tsim muaj kev cuam tshuam loj heev rau kev nruj nruj.Nyob rau hauv cov ntaub ntawv ntawm lub dav-lub cev qis axis (Y), cov tshuaj IGM muaj tshaj 40% ntau dua yob nruj, 30% ntau dua pitch stiffness thiab 20% ntau dua yaw txhav dua ib theem-on-granite tsim.Ib yam li ntawd, IGM tus choj muaj plaub npaug ntawm qhov hnyav ntawm yob, ob npaug ntawm lub suab nruj thiab ntau dua 30% ntau dua qhov tawv tawv dua li nws cov theem-on-granite counterpart.Kev nruj dua angular yog qhov zoo vim tias nws ncaj qha txhawb kev txhim kho dynamic kev ua tau zoo, uas yog qhov tseem ceeb rau kev ua kom lub tshuab siab dua.
Load Capacity
Cov tshuaj IGM cov kabmob loj dua tso cai rau lub peev xwm ua haujlwm ntau dua li cov tshuaj theem-on-granite.Txawm hais tias PRO560LM puag-axis ntawm theem-on-granite tov muaj peev xwm thauj khoom ntawm 150 kg, cov kev daws teeb meem IGM tuaj yeem ua kom haum rau 300 kg payload.Ib yam li ntawd, theem-on-granite's PRO280LM choj axis txhawb nqa 150 kg, whereas IGM tov tus choj axis tuaj yeem nqa txog 200 kg.
Tsiv Mass
Thaum cov bearings loj dua nyob rau hauv cov neeg kho tshuab-cov kabmob IGM axes muab cov txiaj ntsig zoo dua qub thiab muaj peev xwm nqa tau ntau dua, lawv kuj tuaj nrog cov tsheb loj, hnyav dua.Tsis tas li ntawd, cov tsheb thauj khoom IGM tau tsim los xws li qee qhov kev ua haujlwm uas tsim nyog rau theem-on-granite axis (tab sis tsis tas yuav tsum tau los ntawm IGM axis) raug tshem tawm kom nce ib feem nruj thiab ua kom yooj yim rau kev tsim khoom.Cov xwm txheej no txhais tau hais tias IGM axis muaj qhov txav txav ntau dua li qhov sib thooj-on-granite axis.Ib qho indisputable downside yog tias IGM qhov siab tshaj plaws acceleration yog qis dua, piv txwv tias lub cev muaj zog tso zis tsis hloov.Txawm li cas los xij, hauv qee qhov xwm txheej, qhov loj dua qhov txav mus los yuav muaj txiaj ntsig zoo los ntawm qhov kev xav tias nws qhov inertia loj tuaj yeem ua rau muaj kev cuam tshuam ntau dua rau kev cuam tshuam, uas tuaj yeem cuam tshuam rau hauv txoj hauj lwm ruaj khov.
Qauv Dynamics
Lub IGM system qhov siab dua cov kabmob nruj thiab cov tsheb thauj khoom nruj dua muab cov txiaj ntsig ntxiv uas pom meej tom qab siv qhov kev txheeb xyuas qhov kawg (FEA) software pob los ua qhov kev tshuaj ntsuam xyuas.Hauv txoj kev tshawb no, peb tau tshuaj xyuas thawj lub suab ntawm lub tsheb thauj mus los vim nws cuam tshuam rau servo bandwidth.Lub PRO560LM carriage ntsib ib tug resonance ntawm 400 Hz, thaum tus coj IGM carriage ntsib tib hom ntawm 430 Hz.Daim duab 3 qhia txog qhov tshwm sim no.
Lub resonance siab dua ntawm cov tshuaj IGM, thaum piv rau cov tsoos theem-on-granite, tuaj yeem raug ntaus nqi rau ib feem ntawm lub tsheb thauj mus los thiab cov kabmob.Lub carriage resonance ntau dua ua rau nws muaj peev xwm muaj ntau dua servo bandwidth thiab yog li txhim kho kev ua haujlwm zoo.
Kev ua haujlwm ib puag ncig
Axis sealability yuav luag txhua qhov yuav tsum tau ua thaum muaj cov kab mob sib kis, txawm tias tsim los ntawm tus neeg siv cov txheej txheem lossis lwm yam uas muaj nyob hauv lub tshuab ib puag ncig.Stage-on-granite cov kev daws teeb meem tshwj xeeb yog tsim nyog nyob rau hauv cov xwm txheej no vim yog qhov tshwm sim ntawm qhov axis.PRO-series linear theem, piv txwv li, tuaj nruab nrog hardcovers thiab sab ntsaws ruaj ruaj uas tiv thaiv cov theem sab hauv los ntawm kev sib kis mus rau qhov tsim nyog.Cov theem no kuj tseem yuav raug teeb tsa nrog kev xaiv cov ntsiav tshuaj wipers los cheb cov khib nyiab tawm ntawm sab saum toj hardcover raws li theem traverses.Ntawm qhov tod tes, IGM motion platforms yog qhib rau hauv qhov xwm txheej, nrog cov bearings, motors thiab encoders nthuav tawm.Txawm hais tias tsis yog ib qho teeb meem hauv ib puag ncig huv, qhov no tuaj yeem muaj teeb meem thaum muaj kev sib kis.Nws muaj peev xwm hais txog qhov teeb meem no los ntawm kev sib koom ua ke tshwj xeeb hauv txoj kev hauv tsev-npog rau hauv IGM axis tsim los muab kev tiv thaiv los ntawm cov khib nyiab.Tab sis yog tias tsis ua raws li qhov raug, lub hauv paus tuaj yeem cuam tshuam qhov axis 'kev txav los ntawm kev faib tawm sab nraud ntawm lub tsheb thauj mus los thaum nws txav mus los ntawm nws qhov kev mus ncig tag nrho.
Kev tu
Serviceability yog qhov sib txawv ntawm theem-on-granite thiab IGM motion platforms.Linear-motor axes paub zoo txog lawv qhov kev ruaj ntseg, tab sis qee zaum nws yuav tsum tau ua kev saib xyuas.Qee qhov kev saib xyuas kev ua haujlwm yog qhov yooj yim thiab tuaj yeem ua tiav yam tsis tau tshem tawm lossis disassembling cov axis hauv nqe lus nug, tab sis qee zaum yuav tsum tau ua kom tiav ntau dua.Thaum cov lus tsa suab platform muaj cov theem tsis sib xws mounted ntawm granite, kev pabcuam yog ib txoj haujlwm ncaj nraim.Ua ntej, tshem tawm cov theem ntawm granite, tom qab ntawd ua cov haujlwm kho tsim nyog thiab remount nws.Los yog, tsuas yog hloov nws nrog rau theem tshiab.
IGM cov kev daws teeb meem tuaj yeem muaj qhov nyuaj dua thaum ua haujlwm tu.Txawm hais tias hloov cov hlau nplaum ib leeg ntawm lub cev muaj zog yog qhov yooj yim heev hauv qhov no, kev kho thiab kev kho kom yooj yim dua feem ntau cuam tshuam tag nrho cov khoom siv los yog tag nrho cov khoom uas muaj cov axis, uas yog siv sij hawm ntau dua thaum cov khoom txuas ncaj qha rau granite.Nws kuj yog qhov nyuaj dua los kho cov granite-raws li axes rau ib leeg tom qab ua haujlwm txij nkawm - ib txoj hauj lwm uas ncaj nraim nrog cov theem tsis sib xws.
Table 1. Cov ntsiab lus tseem ceeb ntawm kev sib txawv ntawm cov khoom siv-cov kabmob theem-on-granite thiab IGM kev daws teeb meem.
| Kev piav qhia | Theem-on-Granite System, Mechanical Bearing | IGM System, Mechanical Bearing | |||
| Lub hauv paus Axis (Y) | Choj Axis (X) | Lub hauv paus Axis (Y) | Choj Axis (X) | ||
| Normalized txhav | Ntsug | 1.0 | 1.0 | 1.2 | 1.1 |
| Lateral | 1.5 | ||||
| Suab | 1.3 | 2.0 | |||
| Yob | 1.4 | 4.1 | |||
| Yog | 1.2 | 1.3 | |||
| Thauj khoom muaj peev xwm (kg) | 150 | 150 | 300 | 200 | |
| Qhov hnyav (kg) | 25 | 14 | 33 | 19 | |
| Tabletop Qhov siab (mm) | 120 | 120 | 80 | 80 | |
| Kev ruaj ntseg | Hardcover thiab sab seals muaj kev tiv thaiv los ntawm cov khib nyiab nkag mus rau hauv axis. | IGM feem ntau yog qhib tsim.Sealing xav tau qhov sib ntxiv ntawm txoj hauv kev hauv qab npog lossis zoo sib xws. | |||
| Kev pabcuam | Cheebtsam theem tuaj yeem raug tshem tawm thiab yooj yim muab kev pabcuam lossis hloov pauv. | Axes yog inherently ua rau hauv cov qauv granite, ua rau kev pabcuam nyuaj. | |||
Kev sib piv nyiaj txiag
Txawm hais tias tus nqi tiag tiag ntawm txhua qhov kev tawm suab yuav sib txawv raws li ntau yam xws li kev mus ncig ntev, axis precision, lub peev xwm thauj khoom thiab lub peev xwm muaj zog, qhov sib piv ntawm cov piv txwv ntawm IGM thiab theem-on-granite motion systems ua nyob rau hauv txoj kev tshawb no qhia tias IGM cov kev daws teeb meem yog. muaj peev xwm muab nruab nrab-rau-siab-precision suab ntawm cov nqi qis dua li lawv cov theem-on-granite counterparts.
Peb txoj kev tshawb fawb txog kev lag luam muaj peb qhov tseem ceeb ntawm cov nqi: cov khoom siv tshuab (nrog rau ob qho tib si tsim khoom thiab cov khoom yuav khoom), kev sib dhos granite, thiab kev ua haujlwm thiab nyiaj siv ua haujlwm.
Tshuab Qhov
Ib qho kev daws teeb meem IGM muab cov nyiaj khaws cia tseem ceeb tshaj qhov kev daws teeb meem-on-granite nyob rau hauv cov nqe lus ntawm lub tshuab.Qhov no feem ntau yog vim lub IGM tsis muaj intricately machined theem pib ntawm Y thiab X axes, uas ntxiv complexity thiab nqi rau cov theem-on-granite kev daws teeb meem.Tsis tas li ntawd, kev txuag nqi tuaj yeem raug ntaus nqi los ntawm kev sib piv ntawm lwm cov khoom siv hauv kev daws teeb meem ntawm IGM, xws li cov tsheb thauj mus los, uas tuaj yeem muaj cov yam ntxwv yooj yim dua thiab qee qhov kev ua siab ntev dua thaum tsim los siv hauv IGM system.
Granite Assemblies
Txawm hais tias cov granite hauv paus-riser-choj cov rooj sib txoos hauv IGM thiab theem-on-granite systems zoo li muaj cov qauv zoo sib xws thiab cov tsos, IGM granite sib dhos yog marginally kim dua.Qhov no yog vim hais tias cov granite nyob rau hauv cov tshuaj IGM yuav siv qhov chaw ntawm machined theem bases nyob rau hauv lub theem-on-granite tov, uas yuav tsum tau cov granite kom muaj feem ntau nruj tolerances nyob rau hauv cov cheeb tsam tseem ceeb, thiab txawm ntxiv nta, xws li extruded txiav thiab/ los yog threaded steel inserts, piv txwv li.Txawm li cas los xij, hauv peb cov ntaub ntawv kawm, qhov nyuaj ntxiv ntawm cov qauv granite yog ntau dua li offset los ntawm kev yooj yim hauv tshuab qhov chaw.
Kev Ua Haujlwm thiab Kev Ua Haujlwm
Vim tias muaj ntau qhov sib xws hauv kev sib dhos thiab kev sim ob qho tib si IGM thiab theem-on-granite systems, tsis muaj qhov sib txawv tseem ceeb hauv kev ua haujlwm thiab cov nqi siv nyiaj.
Thaum tag nrho cov nqi sib xyaw ua ke, cov kev daws teeb meem tshwj xeeb ntawm IGM tshuaj xyuas hauv qhov kev tshawb fawb no yog kwv yees li 15% tus nqi qis dua li cov khoom siv-cov kabmob, theem-on-granite tov.
Tau kawg, cov txiaj ntsig ntawm kev txheeb xyuas nyiaj txiag tsis yog nyob ntawm tus cwj pwm xws li kev mus ncig ntev, qhov tseeb thiab lub peev xwm thauj khoom, tab sis kuj tseem nyob ntawm cov khoom xws li kev xaiv cov khoom siv granite.Tsis tas li ntawd, nws yog qhov ua tau zoo los txiav txim siab txog cov nqi thauj khoom thiab kev thauj mus los uas cuam tshuam nrog kev muab cov qauv granite.Tshwj xeeb tshaj yog pab tau rau cov tshuab granite loj heev, txawm hais tias muaj tseeb rau txhua qhov ntau thiab tsawg, xaiv tus neeg tsim khoom tsim nyog granite nyob ze ze rau qhov chaw ntawm qhov kev sib dhos zaum kawg tuaj yeem pab txo tus nqi ib yam nkaus.
Nws tseem yuav tsum tau muab sau tseg tias qhov kev tshuaj ntsuam no tsis xav txog cov nqi tom qab siv.Piv txwv li, xav tias nws yuav tsum tau ua haujlwm rau kev ua haujlwm ntawm kev ua haujlwm los ntawm kev kho lossis hloov lub axis ntawm cov lus tsa suab.Ib theem-on-granite system tuaj yeem muab kev pabcuam los ntawm tsuas yog tshem tawm thiab kho / hloov cov axis cuam tshuam.Vim hais tias ntawm ntau theem-style qauv tsim, qhov no tuaj yeem ua tiav nrog cov txheeb ze yooj yim thiab ceev, txawm tias tus nqi pib ntau dua.Txawm hais tias IGM tshuab feem ntau tuaj yeem tau txais ntawm tus nqi qis dua li lawv cov theem-on-granite counterparts, lawv tuaj yeem nyuaj dua rau kev tshem tawm thiab kev pabcuam vim yog kev sib koom ua ke ntawm kev tsim kho.
Xaus
Kom meej meej txhua hom kev txav platform tsim - theem-on-granite thiab IGM - tuaj yeem muab cov txiaj ntsig sib txawv.Txawm li cas los xij, nws tsis yog ib txwm pom tseeb uas yog qhov kev xaiv zoo tshaj plaws rau ib qho kev thov tshwj xeeb.Yog li ntawd, nws muaj txiaj ntsig zoo rau kev koom tes nrog kev paub dhau los thiab cov khoom siv hluav taws xob automation, xws li Aerotech, uas muaj cov ntawv thov tshwj xeeb, kev sib tham txog txoj hauv kev los tshawb nrhiav thiab muab kev pom zoo rau cov kev daws teeb meem rau kev nyuaj rau kev tswj hwm thiab kev siv automation.Kev nkag siab tsis tsuas yog qhov sib txawv ntawm ob hom kev daws teeb meem ntawm automation, tab sis kuj yog qhov tseem ceeb ntawm cov teeb meem uas lawv yuav tsum tau daws, yog lub hauv paus tseem ceeb rau kev ua tiav hauv kev xaiv cov lus tsa suab uas hais txog ob qho tib si cov hom phiaj thiab nyiaj txiag ntawm txoj haujlwm.
Los ntawm AEROTECH.
Post lub sij hawm: Dec-31-2021