Kayan gini masu daidaiton zafi. Tabbatar cewa manyan abubuwan da ke cikin ginin injin sun ƙunshi kayan da ba su da sauƙin kamuwa da bambancin zafin jiki. Yi la'akari da gadar (axis na injin X), tallafin gadar, layin jagora (axis na injin Y), bearings da sandar Z na injin. Waɗannan sassan suna shafar ma'aunin injin kai tsaye da daidaiton motsi, kuma suna wakiltar sassan kashin baya na CMM.
Kamfanoni da yawa suna yin waɗannan abubuwan da aka haɗa da aluminum saboda sauƙin nauyinsa, iyawarsa ta injina da kuma ƙarancin farashi. Duk da haka, kayan kamar granite ko yumbu sun fi kyau ga CMMs saboda yanayin zafinsu. Baya ga gaskiyar cewa aluminum yana faɗaɗa kusan sau huɗu fiye da granite, granite yana da kyawawan halaye na rage girgiza kuma yana iya samar da kyakkyawan ƙarewa a saman da bearings za su iya tafiya a kai. Granite, a zahiri, ya kasance ma'aunin da aka yarda da shi sosai don aunawa tsawon shekaru.
Amma ga CMMs, granite yana da matsala ɗaya - yana da nauyi. Matsalar ita ce, ko dai da hannu ko ta hanyar servo, za a iya motsa granite CMM a kan gatarinsa don ɗaukar ma'auni. Wata ƙungiya, The LS Starrett Co., ta sami mafita mai ban sha'awa ga wannan matsalar: Fasahar Granite Hollow.
Wannan fasaha tana amfani da faranti masu ƙarfi da katako waɗanda aka ƙera kuma aka haɗa su don samar da ɓangarorin tsarin da ba su da ramuka. Waɗannan gine-ginen da ba su da ramuka suna da nauyi kamar aluminum yayin da suke riƙe da halayen zafi masu kyau na granite. Starrett yana amfani da wannan fasaha don ɓangarorin tallafi na gada da gada. A irin wannan salon, suna amfani da yumbu mai rami don gadar akan manyan CMMs lokacin da granite mai rami ba shi da amfani.
Bearings. Kusan dukkan masana'antun CMM sun bar tsoffin tsarin bearings a baya, suna zaɓar tsarin bearings mafi girma. Waɗannan tsarin ba sa buƙatar hulɗa tsakanin bearings da saman bearings yayin amfani, wanda hakan ke haifar da rashin lalacewa. Bugu da ƙari, bearings na iska ba su da sassan motsi kuma, saboda haka, babu hayaniya ko girgiza.
Duk da haka, bearings na iska suna da bambance-bambancen da ke tsakaninsu. Mafi kyau, nemi tsarin da ke amfani da graphite mai ramuka a matsayin kayan ɗaukar hoto maimakon aluminum. Graphite a cikin waɗannan bearings yana ba da damar iskar da aka matse ta ratsa kai tsaye ta cikin porosity na halitta da ke cikin graphite, wanda ke haifar da iska mai warwatse a saman bearings. Haka kuma, Layer ɗin iska da wannan bearings ke samarwa siriri ne sosai - kusan 0.0002". Bearings na aluminum da aka haɗa da aka saba da su, a gefe guda, yawanci suna da tazara tsakanin 0.0010″ da 0.0030″. Ƙaramin tazara na iska ya fi dacewa saboda yana rage yanayin injin na yin tsalle a kan matashin iska kuma yana haifar da injin da ya fi tauri, daidai kuma mai maimaitawa.
Da hannu vs. DCC. Tantance ko za a sayi CMM na hannu ko na atomatik abu ne mai sauƙi. Idan babban yanayin masana'antar ku yana mai da hankali kan samarwa, to yawanci injin sarrafa kwamfuta kai tsaye shine mafi kyawun zaɓi a cikin dogon lokaci, kodayake farashin farko zai fi girma. CMM na hannu sun dace idan za a yi amfani da su musamman don aikin duba kayan aiki na farko ko don injiniyan baya. Idan kuna yin abubuwa da yawa kuma ba kwa son siyan injuna biyu, yi la'akari da DCC CMM tare da na'urorin servo da za a iya cirewa, wanda ke ba da damar amfani da hannu lokacin da ake buƙata.
Tsarin tuƙi. Lokacin zaɓar DCC CMM, nemi injin da ba shi da hysteresis (backlash) a cikin tsarin tuƙi. Hysteresis yana shafar daidaiton wurin da injin yake da kuma sake maimaitawa. Drives masu friction suna amfani da shaft ɗin tuƙi kai tsaye tare da madaidaicin madaurin tuƙi, wanda ke haifar da sifili hysteresis da ƙaramin girgiza.
Lokacin Saƙo: Janairu-19-2022