Zipangizo zomangira zokhazikika pa kutentha. Onetsetsani kuti ziwalo zazikulu zomangira makina zimapangidwa ndi zipangizo zomwe sizimakhudzidwa kwambiri ndi kusintha kwa kutentha. Taganizirani za mlatho (makina a X-axis), zothandizira mlatho, njanji yotsogolera (makina a Y-axis), mabearing ndi mzere wa Z-axis wa makina. Zigawozi zimakhudza mwachindunji miyeso ndi kulondola kwa makinawo, ndipo zimapanga zigawo za msana wa CMM.
Makampani ambiri amapanga zinthuzi ndi aluminiyamu chifukwa cha kulemera kwake kopepuka, makina ake ogwirira ntchito komanso mtengo wake wotsika. Komabe, zinthu monga granite kapena ceramic ndizabwino kwambiri kwa ma CMM chifukwa cha kukhazikika kwawo kutentha. Kuphatikiza pa mfundo yakuti aluminiyamu imakula pafupifupi kanayi kuposa granite, granite ili ndi mphamvu zabwino kwambiri zochepetsera kugwedezeka ndipo ingapereke mawonekedwe abwino kwambiri pamwamba pomwe ma bearing amatha kuyenda. Granite, kwenikweni, yakhala muyezo wovomerezeka kwambiri woyezera kwa zaka zambiri.
Komabe, kwa ma CMM, granite ili ndi vuto limodzi - ndi lolemera. Vuto ndilakuti, kaya ndi dzanja kapena ndi servo, mutha kusuntha granite CMM mozungulira pa nkhwangwa zake kuti muyese. Bungwe lina, The LS Starrett Co., lapeza yankho losangalatsa la vutoli: Hollow Granite Technology.
Ukadaulo uwu umagwiritsa ntchito mbale zolimba za granite ndi matabwa omwe amapangidwa ndikusonkhanitsidwa kuti apange ziwalo zopanda kanthu. Nyumba zopanda kanthuzi zimalemera ngati aluminiyamu pomwe zimasunga mawonekedwe abwino a granite. Starrett amagwiritsa ntchito ukadaulo uwu pa ziwalo zothandizira mlatho ndi mlatho. Mofananamo, amagwiritsa ntchito ceramic yopanda kanthu pa mlatho pa ma CMM akuluakulu pomwe granite yopanda kanthu siigwira ntchito.
Mabearing. Pafupifupi opanga onse a CMM asiya makina akale onyamula ma roller, posankha makina apamwamba kwambiri onyamula mpweya. Makina awa safuna kukhudzana pakati pa bearing ndi pamwamba pa bearing panthawi yogwiritsidwa ntchito, zomwe zimapangitsa kuti zisakhale zotayika. Kuphatikiza apo, mabearing a mpweya alibe ziwalo zosuntha ndipo, motero, alibe phokoso kapena kugwedezeka.
Komabe, ma bearing a mpweya nawonso ali ndi kusiyana kwawo. Chabwino, yang'anani dongosolo lomwe limagwiritsa ntchito graphite yokhala ndi porous ngati zinthu zoyendetsera m'malo mwa aluminiyamu. Grafiti yomwe ili mu ma bearing awa imalola mpweya wopanikizika kudutsa mwachindunji kudzera mu porosity yachilengedwe yomwe ili mu graphite, zomwe zimapangitsa kuti mpweya ukhale wofalikira mofanana pamwamba pa bearing. Komanso, mpweya womwe bearing iyi imapanga ndi woonda kwambiri - pafupifupi 0.0002″. Ma bearing a aluminiyamu okhazikika, kumbali ina, nthawi zambiri amakhala ndi mpweya pakati pa 0.0010″ ndi 0.0030″. Mpata waung'ono wa mpweya ndi wabwino chifukwa umachepetsa chizolowezi cha makina chodumphira pa pilo ya mpweya ndipo zimapangitsa kuti makina akhale olimba kwambiri, olondola komanso obwerezabwereza.
Kusankha pamanja motsutsana ndi DCC. Kudziwa ngati mugule CMM yamanja kapena yodzipangira yokha n'kosavuta. Ngati malo anu opangira zinthu ndi okhazikika pakupanga, nthawi zambiri makina oyendetsedwa ndi kompyuta mwachindunji ndiye njira yabwino kwambiri pakapita nthawi, ngakhale mtengo woyamba udzakhala wokwera. Ma CMM amanja ndi abwino ngati agwiritsidwa ntchito makamaka pa ntchito yowunikira yoyamba kapena pakusintha. Ngati muchita zonse ziwiri ndipo simukufuna kugula makina awiri, ganizirani za DCC CMM yokhala ndi ma servo drive osagwiritsidwa ntchito, zomwe zimalola kugwiritsa ntchito pamanja ngati pakufunika.
Dongosolo loyendetsa. Mukasankha DCC CMM, yang'anani makina opanda hysteresis (backlash) mu dongosolo loyendetsa. Hysteresis imakhudza kwambiri kulondola kwa malo a makinawo komanso kubwerezabwereza. Ma drive othamanga amagwiritsa ntchito shaft yoyendetsa mwachindunji yokhala ndi band yoyendetsa bwino, zomwe zimapangitsa kuti pasakhale hysteresis komanso kugwedezeka kochepa.
Nthawi yotumizira: Januwale-19-2022