Zipangizo zomangira zokhazikika pa thermally.Onetsetsani kuti zida zoyambira pamakina opangira makina zimakhala ndi zinthu zomwe sizingatengeke ndi kusintha kwa kutentha.Ganizirani za mlatho (makina a X-axis), zothandizira mlatho, njanji yowongolera (makina a Y-axis), ma bearings ndi bar ya Z-axis ya makina.Magawowa amakhudza mwachindunji kuyeza kwa makina ndi kulondola kwamayendedwe, ndipo amapanga zigawo zam'mbuyo za CMM.
Makampani ambiri amapanga zigawozi ndi aluminiyumu chifukwa cha kulemera kwake, makina ake komanso mtengo wake wotsika.Komabe, zida monga granite kapena ceramic ndizabwinoko kwambiri kwa ma CMM chifukwa chakutentha kwawo.Kuphatikiza pa mfundo yakuti aluminiyumu imakula pafupifupi kanayi kuposa granite, granite ili ndi mikhalidwe yabwino kwambiri yochepetsera kugwedezeka ndipo imatha kupereka mapeto abwino kwambiri omwe ma berelo amatha kuyenda.Granite, kwenikweni, wakhala muyezo wovomerezeka wovomerezeka kwa zaka zambiri.
Kwa ma CMM, komabe, granite ili ndi drawback imodzi - ndiyolemera.Vutoli ndikutha, mwina ndi dzanja kapena servo, kusuntha granite CMM mozungulira nkhwangwa zake kuti ayese.Bungwe lina, The LS Starrett Co., lapeza njira yosangalatsa yothetsera vutoli: Hollow Granite Technology.
Tekinoloje iyi imagwiritsa ntchito mbale zolimba za granite ndi matabwa omwe amapangidwa ndikusonkhanitsidwa kuti apange ziwalo zopanda kanthu.Zomangamangazi zimalemera ngati aluminiyamu pomwe zimasunga mawonekedwe abwino amafuta a granite.Starrett amagwiritsa ntchito ukadaulo uwu kwa mamembala othandizira mlatho ndi mlatho.Momwemonso, amagwiritsa ntchito ceramic popangira mlatho pama CMM akulu kwambiri pomwe granite yopanda kanthu imakhala yosatheka.
Ma Bearings.Pafupifupi onse opanga CMM asiya machitidwe akale odzigudubuza kumbuyo, akusankha machitidwe apamwamba kwambiri oyendetsa mpweya.Machitidwewa safuna kukhudzana pakati pa chonyamulira ndi pamwamba pa ntchito, zomwe zimapangitsa kuti ziro zivale.Kuonjezera apo, mayendedwe a mpweya alibe ziwalo zosuntha ndipo, motero, palibe phokoso kapena kugwedezeka.
Komabe, mayendedwe a mpweya amakhalanso ndi zosiyana zawo.Moyenera, yang'anani dongosolo lomwe limagwiritsa ntchito porous graphite ngati chonyamulira m'malo mwa aluminiyamu.Ma graphite omwe ali m'maberewa amalola kuti mpweya woponderezedwa udutse molunjika ku porosity yachilengedwe yomwe ili mu graphite, zomwe zimapangitsa kuti mpweya uzikhala wobalalika kwambiri pamtunda.Komanso, mpweya womwe mpweya umatulutsa ndi woonda kwambiri - pafupifupi 0.0002 ″.Komano, ma fani a aluminiyamu okhazikika, nthawi zambiri amakhala ndi kusiyana kwa mpweya pakati pa 0.0010 ″ ndi 0.0030 ″.Mpweya waung'ono umakhala wabwino chifukwa umachepetsa chizolowezi cha makina okwera pamakina a mpweya ndikupangitsa makina olimba kwambiri, olondola komanso obwerezabwereza.
Manual vs. DCC.Kusankha kugula buku la CMM kapena lodzipangira nokha ndikosavuta.Ngati malo anu oyambirira opangira zinthu ndi opangidwa ndi kupanga, ndiye kuti nthawi zambiri makina oyendetsedwa ndi makompyuta ndi njira yabwino kwambiri pakapita nthawi, ngakhale mtengo woyamba udzakhala wapamwamba.Ma CMM a pamanja ndiabwino ngati akuyenera kugwiritsidwa ntchito poyang'anira nkhani yoyamba kapena ukadaulo wosintha.Ngati mukuchita zonse ziwiri ndipo simukufuna kugula makina awiri, ganizirani za DCC CMM yokhala ndi ma servo drives, omwe amalola kugwiritsa ntchito pamanja pakafunika.
Drive system.Mukasankha DCC CMM, yang'anani makina opanda hysteresis (backlash) mumayendedwe oyendetsa.Hysteresis imakhudza kwambiri kulondola kwa makina komanso kubwerezabwereza.Ma friction drives amagwiritsa ntchito shaft yachindunji yokhala ndi band yoyendetsa bwino, zomwe zimapangitsa kuti zero hysteresis ndi kugwedezeka kochepa.
Nthawi yotumiza: Jan-19-2022