Ngolwimi lobunjineli boomatshini, "ukungaguquguquki" yinto efanelekileyo yethiyori - into ebonakala kwiingxelo zeengxaki zeencwadi kodwa ayikaze ifezekiswe ngokupheleleyo kwihlabathi elibonakalayo. Sekunjalo kwizigaba zokubeka ngokuchanekileyo ezihambisa ii-silicon wafers kwiimashini ze-lithography, iinkqubo ze-laser ezibhala ngqo, izixhobo zokubhola ze-PCB ezikhawulezayo, kunye namaqonga okuhlola esikali se-nanometer, izinto ezihambayo zisondela kakhulu kule mbono. Zikwenza oko ngetekhnoloji ebizwa ngokuba yi-air bearing, kwaye umphezulu apho loo filimu incinci yomoya ihamba khona phantse isoloko i-precision granite.
Ukuqonda iteknoloji yokuthwala umoya — ifiziksi yayo, iimfuno zayo, kunye nemida yayo — akunakuhlukaniswa nokuqonda ukuba kutheni igranite iyinto ekhethwayo kwiindawo ezikhokelayo zokuthwala umoya. Ezi teknoloji zimbini ziyahambelana: iibheringi zomoya zivumela ukusetyenziswa kweempawu zomphezulu wegranite ezichanekileyo, kwaye igranite ivumela iibheringi zomoya ukuba zifezekise uzinzo kunye nokuchaneka kokubeka izinto okwenza zifaneleke ukusetyenziswa kwasekuqaleni.
Ifiziksi yokusebenza kokuthwala umoya
I-bearing yesiqhelo ye-rolling-element — i-ball bearing okanye i-roller bearing — ixhasa umthwalo oshukumayo ngoqhagamshelwano lweHertzian: iibhola okanye ii-roller zicinezela kwiindlela zomdyarho, zitshintsha kancinci phantsi komthwalo kwaye zidlulise amandla kwindawo encinci kodwa engenanto yokunxibelelana. Olu qhagamshelwano luvelisa ukungqubana, luzisa ukuguguleka, kwaye ludala indlela yoomatshini apho ukungcangcazela kunokudluliselwa khona ukusuka kwi-bearing ukuya kwisakhiwo esixhaswayo.
I-air bearing ithatha indawo yolu nxibelelwano luqinileyo ngefilimu encinci yegesi ecinezelweyo — umoya ococekileyo nowomileyo ocinezelweyo, nangona i-nitrogen isetyenziswa kwiindawo apho umxholo womswakama womoya unengxaki. Into ehambayo ("islayida" okanye "inqwelo") yahlulwe kumphezulu wesikhokelo ngesithuba esiqhelekileyo esingama-micrometer ama-5-15 ububanzi. Umoya ocinezelweyo unikezelwa ngee-orifices ezincinci okanye iindawo ezinemingxuma ebusweni beslayida, ungena kwesi sithuba, uze uphume emaphethelweni endawo yeslayida.
Ukusasazwa koxinzelelo kwindawo evulekileyo — phezulu kufutshane neendawo zokuhambisa, ezantsi kufutshane nendawo yokuphuma — kuvelisa amandla okuphakamisa axhasa ubunzima benqwelo (kwiindlela ezithe tye) okanye umthwalo osetyenzisiweyo. Njengoko indawo evulekileyo incipha (umzekelo, ukuba inqwelo ithambekela kancinci phantsi komthwalo), ukumelana nokuhamba kwamanzi kuyanda, uxinzelelo luyanda, kwaye amandla okubuyisela ayanda — okudala inkqubo yokuzinzisa. Ngokwahlukileyo koko, ukuba indawo evulekileyo iyanda, uxinzelelo luyawa kwaye ibhereji iyancipha.
Isiphumo esiphambili sale nkxaso yomthwalo ongenazo iintambo kukushenxiswa ngokupheleleyo kwe-static friction kunye ne-sliding friction. Isigaba sokuthwala umoya esiyilwe kakuhle sine-static friction engenakulinganiswa ngokufanelekileyo - ngokusisiseko akukho nto ngaphakathi kwesisombululo seenkqubo ezininzi zokulinganisa amandla. Le mpawu ichazwa njengokungabikho "kwe-stiction" - into yokutyibilika kwe-stick-slip apho i-static friction (ephezulu kune-kinetic friction) kufuneka yoyiswe ukuze kuqaliswe intshukumo, nto leyo ebangela ukujija okuphazamisa indawo elandelayo.
Kutheni iNtshukumo engenaSithintelo ibalulekile ekuBekeni ngokuchanekileyo
Kwinqanaba lokuma eliqhelekileyo lebhola-skrubu okanye i-leadscrew-driven-driven positioning stage elinee-rolling element bearings, i-stiction ngumda osisiseko ekuphindaphindeni kokubeka. Xa inkqubo yokulawula indawo iyalela intshukumo encinci, indlela yokuqhuba kufuneka iqale yoyise ukungqubana okungashukumiyo ngaphambi kokuba inqwelo ihambe kwaphela. Oku kuthetha ukuba indawo elawulwayo kunye nendawo yokwenyani azifani ngobukhulu obuncinci benyathelo - inqanaba "liyanamathela" lize "lityibilike," lidlulele kwindawo elawulwayo ngaphambi kokuba lizinze.
Esi siphumo sibeka umda ophantsi osebenzayo kubungakanani benyathelo kunye ne-bandwidth yokubeka. Kwiinkqubo ze-servo, i-stiction ibangela i-limit cycling - imeko apho i-loop yolawulo lwesikhundla ijikeleza ngokuqhubekayo kwindawo eyalelayo, ingakwazi ukuhlala kwixabiso elizinzileyo kuba nayiphi na intshukumo yokulungisa ifuna ukoyisa i-stiction, ethi emva koko ithumele inqanaba ngaphaya kwethagethi.
Iibheringi zomoya aziyithinteli ngokupheleleyo into yokubamba. Inqwelo idada kwifilimu yomoya eqhubekayo, kwaye naliphi na amandla amancinci asetyenziswa kwicala lokuhamba avelisa intshukumo elinganayo. Oku kuthetha ukuba:
- Ukubekwa kwinqanaba le-nanometer kunokwenzeka kusetyenziswa iindlela ezifanelekileyo zokuqhuba (ii-linear motors, ii-piezoelectric actuators, okanye ii-voice-coil actuators) ngaphandle komda ophantsi wobukhulu besinyathelo obubekwa yimiqathango.
- Ixesha lokuzinza lincitshiswe kakhulu kuba iluphu yokulawula ayilwi nxamnye nentshukumo nganye
- Ukuphindaphinda kunqunyelwe ikakhulu sisisombululo se-encoder kunye neziphumo zobushushu kunokuba kube kukuguquguquka kokungqubana
Kwi-photolithography ye-semiconductor, apho inqanaba le-wafer kufuneka linyathele kwindawo nganye yokudaya kunye nokuphindaphinda kwe-sub-nanometer kwiziphumo zamakhulu amanyathelo ngomzuzwana, ezi mpawu zibalulekile. Akukho buchwepheshe bokuthwala obubonelela ngokusebenza okufanayo kwisikali esifunekayo.
Umphezulu weSikhokelo seGranite: Ukuvumela Ukusebenza koMbane woMoya
I-air bearing ilungile kuphela njengomphezulu ekhwele kuwo. Umsantsa wefilimu yomoya oyi-5–15 μm awungqinelani nobunzima bomphezulu wesikhokelo — yisithuba esipheleleyo sokusebenza kuquka yonke imithombo yokwahluka. Umphezulu wesikhokelo ngokwawo kufuneka ube mkhulu kwaye uthambe kunesi sithuba ukuze i-air bearing isebenze ngokuchanekileyo.
Iimfuneko zokugqiba umphezulu (uburhabaxa)
Uburhabaxa bomphezulu wesikhokelo kufuneka bube yinxalenye encinci yesithuba somoya.umphezulu wesikhokelokunye nobunzima beRa obuyi-0.4 μm (umphezulu olungileyo owenziwe ngomatshini) buya kubonisa utshintsho lokuphakama kwendawo olufana nenxalenye ebalulekileyo yomsantsa womoya, nto leyo edala ukuguquguquka koxinzelelo oluguquguqukayo oluguqulela ngqo kwingxolo yokubeka indawo kwinqwelo.
Imiphezulu yesikhokelo segranite echanekileyo yokusetyenziswa komoya idibene ngokwexabiso le-Ra eliyi-0.02–0.1 μm (20–100 nm) — elihambelana nokugqitywa komgangatho wesipili. Ukufezekisa la maxabiso arhabaxa kwigranite kufuna iindlela ezikhethekileyo zokudibanisa, izixhobo zokukrala ezikumgangatho ophezulu, kunye nabasebenzi abanobuchule abaqonda zombini iindlela zokususa izinto kunye nokuziphatha kwesakhiwo sekristale segranite ngexesha lokudibanisa kakuhle.
Ubunzima begranite bubaluleke ngqo apha: ilitye eliqinileyo nelixineneyo (njengegranite emnyama yeprimiyamu enobunzima obuyi-≈ 3,100 kg/m³) linokufakwa kwi-lap ukuze libe rhabaxa kancinci kunegranite engwevu okanye imabula ethambileyo, kuba isakhiwo sayo sekristale esincinci nesinamatheleyo asizikhuphi iziqwenga zeenkozo ezikrwela umphezulu ngexesha lokufakwa kwe-lap. Esi sesinye sezizathu ezibalulekileyo zobugcisa zokuba ukukhethwa kwezinto kubalulekile kwiindawo ezikhokelayo zokuthwala umoya, kungekuphela nje kwiinkcazo ze-flatness yomhlaba wonke yeplate yomphezulu.
Iimfuneko zokuLula kunye nokuLula
Ngaphaya kokuba lukhuni komphezulu, iindawo ezikhokelayo zomoya kufuneka zihlangabezane neemfuno ezingqongqo zokuba tyaba. Isithuthi sesigaba somoya "sifunda" umphezulu wesikhokelo - ukujongwa kwawo kwindawo nganye ekuhambeni kuxhomekeka kwimo yendawo yomphezulu wesikhokelo. Nakuphi na ukuphambuka ekuthambekeni okufanelekileyo (kwicala lika-Z) okanye ngokuthe tye (kwicala elithe nkqo ukuya kwintshukumo, ngaphakathi kwendiza ye-XY) yomphezulu wesikhokelo kuphinda kuvele njengempazamo yokuhamba ehambelanayo yesithuthi.
Le yinto eyaziwa ngokuba yi-Abbe error (okanye i-sine error): ukuba umphezulu wesikhokelo unempazamo yokuthambeka kwe-θ radians, kwaye indawo enomdla kwinqwelo ikumgama we-L ukusuka kumphezulu wesikhokelo, impazamo yendawo esecaleni ephumayo yi-L × sin(θ) ≈ L × θ kwii-engile ezincinci. Kwinqwelo apho i-encoder yokulinganisa kunye nenxalenye elinganiswayo zahlulwe nge-100mm kwicala elithe nkqo, impazamo yokuthambeka komphezulu wesikhokelo ye-arcsecond e-1 ivelisa impazamo yendawo emalunga ne-0.48 μm.
Ukunciphisa esi siphumo kufuna iindawo ezikhokelayo ezineempazamo zokuthe tye kuluhlu lwe-arcsecond okanye ngaphantsi, kubude obupheleleyo bokuhamba kweqonga. Kwinqanaba lokuhamba elingama-500mm, oku kuhambelana nokutshintsha kokuphakama kwee-micrometer ezimbalwa okanye ngaphantsi kubude obupheleleyo besikhokelo se-granite. Ukufezekisa nokuqinisekisa eli nqanaba lokuthe tye kufuna iindlela zokuthe tye ngokuchanekileyo, ukulinganisa ngononophelo ngamanqanaba e-elektroniki kunye ne-laser interferometers, kunye neendlela zokulungisa ukukrwela ezifana nezo zisetyenziselwa ukuthe tyela kweplate yomphezulu.
Ukuvuleka kunye nokuVuleka koMoya
Ipropati enye yegranite ebaluleke kakhulu kwizicelo zokuthwala umoya kodwa engaxutyushwa rhoqo kwiincwadi ngokubanzi yi-porosity. Ukuba umphezulu wesikhokelo segranite unemingxuma evulekileyo - imingxuma emincinci edibanisa ingaphakathi lelitye nomphezulu - umoya oxinzelelweyo kwisithuba sokuthwala unokuvuza kwilitye endaweni yokuphuma ngokulinganayo kwi-bearing. Oku kudala ukusasazwa koxinzelelo olungalinganiyo, kwandisa ukusetyenziswa komoya, kwaye kwiimeko ezigqithisileyo kunokubangela ukuba i-bearing iwele kwindawo ethile.
I-granite emnyama enoxinano oluphezulu, ene-porosity yayo ephantsi kakhulu ebangelwa yisakhiwo sayo esixineneyo sekristale, ayichaphazeleki kakhulu yile ngxaki kune-granite engwevu enoxinano oluphantsi. Uxinano olumalunga ne-3,100 kg/m³ — xa kuthelekiswa ne-granite eqhelekileyo engwevu kwi-2,600–2,700 kg/m³ — lubonisa iqhekeza eliphantsi kakhulu le-void kwisixhobo. Kwimiphezulu yesikhokelo se-air bearing, lo mahluko kwi-porosity uchaphazela ngokuthe ngqo ukusebenza kwe-bearing kunye nokuzinza.
Kwizicelo ezibalulekileyo, unyango olongezelelweyo lomphezulu (ukufakwa kwe-vacuum nge-epoxy, okanye iinkqubo ezikhethekileyo zokulapha ezivala ii-surface pores) zingasetyenziswa. Nangona kunjalo, ukuqala ngezinto ezina-porosity ephantsi kunciphisa imfuneko yonyango olunjalo kunye nomngcipheko weengxaki zokusebenza ezinxulumene nee-pore.
Iindibano zoMbane zoMoya zeGranite: Izinto eziqwalaselwayo kuYilo
Inqanaba elipheleleyo lokuthwala umoya kwi-granite libandakanya izinto ezininzi zobunjineli ngaphaya komphezulu wesikhokelo ngokwawo:
Uyilo Lokulayisha Kwangaphambili
Iibheringi zomoya kufuneka zilayishwe kwangaphambili — oko kuthetha ukuba amandla okubuyisela kufuneka achasane naluphi na uhlobo lwenqwelo yokuphakamisa umphezulu wesikhokelo. Ngaphandle kokulayisha kwangaphambili, inqwelo iya kubhabha nje isuke kumphezulu phantsi kokuphazamiseka okuphezulu. Ukulayisha kwangaphambili kufezekiswa ngenye yeendlela ezintathu:
Iibheringi zomoya ezichaseneyo zisebenzisa umphezulu wesibini wokuthwala umoya kwicala elichaseneyo lereyile yesikhokelo okanye umphezulu othe tyaba, zidala amandla oxinzelelo achaseneyo athintela inqwelo ukuya kwisikhokelo ngelixa zisagcina ukwahlukana kwefilimu yomoya kumacala omabini. Olu lolona lungelelwaniso luqhelekileyo lwezigaba ezichanekileyo zomgca.
Iibheringi ezifakwe i-vacuum zisebenzisa indawo ephakathi ye-vacuum ngaphakathi kobuso be-bearing, ejikelezwe yindawo exineneyo. Amandla apheleleyo ngumahluko phakathi kwamandla okuphakamisa indawo exineneyo kunye nomtsalane wendawo ye-vacuum, nto leyo ebangela umthwalo wangaphambili oya kumphezulu wesikhokelo.
Ukulayisha kwangaphambili kwemagnethi kusebenzisa amandla anomtsalane phakathi kweemagnethi ezisisigxina kwinqwelo kunye nomzila wesikhokelo se-ferromagnetic ukutsala inqwelo ukuya kumphezulu. Le ndlela ifuna ukuba umzila wesikhokelo se-granite ufake izinto zentsimbi okanye zesinyithi, nto leyo eyenza kube nzima uyilo kodwa inokuvelisa iindibano ezincinci kakhulu zokuthwala.
Ubonelelo loMoya kunye nokuHlunga
Amanqanaba okuthwala umoya afuna ukunikezelwa rhoqo komoya ococekileyo, owomileyo, ongenamasuntswana acinezelweyo kuxinzelelo olulawulwayo — ngesiqhelo yi-0.4–0.6 MPa. Ungcoliseko lonikezelo lomoya ngee-oyile aerosols, umphunga wamanzi, okanye amasuntswana aqinileyo yenye yezona zinto zixhaphakileyo zokusilela kokuthwala umoya. Ungcoliseko lweoyile lugubungela iindawo zokuthwala, lutshintsha ijiyometri yazo kunye nokufuma kwazo; ukufuma kwamanzi kudala ukuguquguquka koxinzelelo; amasuntswana aqinileyo anokuvala umsantsa wokuthwala aze afumane zombini ubuso benqwelo kunye nomphezulu wesikhokelo segranite.
Kwiindawo zokwenziwa kwe-semiconductor, umgangatho wonikezelo lomoya ngokubanzi ulawulwa kakuhle yimigangatho yezakhiwo. Kwezinye iindawo zoshishino, kufuneka kuthathwe unonophelo ukuze kubonelelwe ngokuhluzwa kunye nokomiswa okufanelekileyo kwindawo yonikezelo lomoya ukuya kwinqanaba.
Imiphumo yobushushu kwifilimu yomoya
Ubushushu bomoya buyatshintsha ngokweqondo lobushushu — malunga ne-2% nge-degree Celsius kubushushu begumbi. Utshintsho olukhulu lobushushu kumbane womoya (ukusuka kwigumbi le-compressor ukuya kwigumbi lokucoca elilawulwa bubushushu, umzekelo) lutshintsha ukuqina kweebheringi kunye namandla okuphakamisa. Kwiindlela zokuchaneka, ubushushu bombane womoya kufuneka bulawulwe ukongeza kuxinzelelo.
Isithuba sokuthwala ngokwaso sivelisa ubushushu obuncinci kodwa obungenalo ulwelo ngokusebenzisa i-viscous shear yefilimu yomoya. Kwizigaba zesantya esiphezulu, lo mthombo wobushushu kufuneka ubalwe kwimodeli yobushushu yenkqubo ukuze kuthintelwe ukuthambekela kobushushu okungalindelekanga kwi-granite okanye kwisakhiwo senqwelo.
Ukulinganisa kunye nokuqinisekiswa kokusebenza kweSigaba sokuBearing Air
Emva kokuhlanganiswa, kufuneka kuchazwe inqanaba lokuthwala umoya kwi-granite ukuqinisekisa ukuba iyahlangabezana neemfuno zayo zokusebenza. Iiparameter eziphambili zokulinganisa ziquka:
Ukuphinda-phinda indawo — kulinganiswa ngokuyalela iqonga ukuya kuthotho lweendawo ekujoliswe kuzo kunye nokurekhoda iindawo zokwenyani nge-encoder eqondileyo ephezulu okanye i-interferometer ye-laser. Ukuphinda-phinda indawo kabini (ukusondela kuzo zombini iindlela) kuvavanya i-hysteresis.
Ukuthe tye kohambo — kulinganiswa ngokufaka umda othe tye ochanekileyo (ngokufuthi, ngokwawo umele ireferensi yegranite echanekileyo) ecaleni kwendlela yokuhamba kunye nokusebenzisa i-gauge ye-elektroniki ukulinganisa ukuphambuka kwenqwelo ukusuka kumgca othe tye njengoko idlula kuluhlu lwayo olupheleleyo.
Iimpazamo ze-angular (pitch, roll, yaw) — zilinganiswa kusetyenziswa ii-autocollimators okanye amanqanaba e-elektroniki afakwe kwinqwelo, nto leyo efumanisa utshintsho oluncinci lwe-angular kwindlela yokuhamba kwenqwelo njengoko ihamba.
Ukusetyenziswa komoya kunye nokuqina kweebheringi — kulinganiswa ngokufaka imithwalo eyaziwayo kwinqwelo kunye nokulinganisa utshintsho oluvelayo lwesithuba (ukusuka ekufundweni kwe-encoder), okuvumela ukuba ubunzima beebheringi (amandla ngeyunithi nganye yokufuduka) bubalwe.
Ezi zilinganiso, ezenziwa ngezixhobo zesisombululo esifanelekileyo kunye nokulinganiswa okulandelelekayo, zibonelela ngesiseko sokusebenza apho inqanaba linokugcinwa khona kwaye liqinisekiswe kwakhona ngexesha lomsebenzi walo.
Izicelo apho iGranite Air Bearing Stages ibalulekile khona
Indibaniselwano yentshukumo yokuthwala umoya kunye nomphezulu wesikhokelo segranite ibonakala naphi na apho ifiziksi yesicelo ifuna khona iipropati zazo ezidibeneyo:
Ukuhlolwa kwe-semiconductor wafer kunye ne-lithography — Sele kuxoxwe ngokubanzi; ukusetyenziswa komlinganiselo okwaqhuba uphuhliso lwetekhnoloji ukuya kwimeko yayo yangoku.
Ukubhola nge-PCB ekhawulezayo — Oomatshini bokubhola be-spindle abaninzi ekufuneka babeke ii-drill bits ezininzi ngaxeshanye phezu kwephaneli ye-PCB basebenzisa iziseko ze-granite kunye nee-cross-slides ezithwala umoya ukuze kufezekiswe indibaniselwano yesantya, ukuchaneka, kunye nokuzinza kwexesha elide okufunekayo.
I-Optical profilometry kunye nokuhlolwa komphezulu — Izixhobo ezilinganisa ubume bomphezulu kwisisombululo se-sub-nanometer kufuneka ziskene i-probe yazo yokulinganisa phezu komphezulu wenxalenye ngentshukumo egudileyo kakhulu, engaphantsi kokungcangcazela. Iibheringi zomoya kwiindawo zesikhokelo se-granite zibonelela ngomgangatho ofunekayo wokunyakaza.
Umatshini wokulungisa ilaser ngokuchanekileyo — iinkqubo zelaser zeFemtosecond kunye nepicosecond ezisetyenziselwa ukususa izinto ngokuchanekileyo — kwiindlela zokusebenza ukusuka kwi-ophthalmology ukuya kwi-microelectronics ukuya kwi-aerospace components — zifuna amanqanaba okubeka izinto ngokuchanekileyo kwinqanaba le-nanometer kunye nentshukumo egudileyo, engenazithintelo ukuze kufezekiswe umgangatho ofunekayo wokukhupha.
Ukulinganiswa kwesikali esithe ngqo — Iinkqubo zokulinganisa ze-encoders ezichanekileyo kunye neenkqubo ze-laser interferometer kufuneka zihambise into esetyenzisiweyo enomgangatho olungileyo wokunyakaza kangangokuba intshukumo ngokwayo ayithinteli ukuchaneka kokulinganiswa. Amanqanaba okuthwala umoya kwiindawo ezikhokelayo zegranite ezichanekileyo zezona zikhethwayo kwiinkqubo zokulinganisa ezifuna kakhulu.
Isiphelo: Ifilimu yoMoya kunye neLitye
Itekhnoloji yokuthwala umoya kunye negranite echanekileyo, ngokwengqiqo yobunjineli bokwenyani, zenzelwe enye kwenye. Ifiziksi yokusebenza kokuthwala umoya ibeka iimfuno ezingqongqo kuburhabaxa bomphezulu wesikhokelo, ukuthamba, kunye neempawu zezinto eziphathekayo - iimfuno zokuba igranite echanekileyo, xa iveliswa kwaye isetyenzwa ngokwemigangatho efanelekileyo, ibekwe kakuhle ngokukodwa ukuhlangabezana nayo. Kwaye ii-air bearings, ngokuphelisa ukungqubana kunye nokuguguleka koqhagamshelwano, zivumela ukugqitywa komphezulu wegranite echanekileyo ukuba isetyenziswe rhoqo ngaphandle kokuwohloka.
Isiphumo kukuba iteknoloji yokubeka izinto ekwaziyo ukufikelela kumgangatho wokunyakaza — olinganiswa ngeenanometers — ebezinokubonakala zimangalisa kwiinjineli zesizukulwana sangaphambili. Ukuba le teknoloji isekelwe, ngokwasemzimbeni nangokwengcinga, kwisiseko selitye lamandulo, yenye yezona zinto zihlekisayo zobunjineli bokuchaneka kwanamhlanje.
Ixesha leposi: Juni-26-2026