Izixhobo zokwakha ezizinzileyo kubushushu. Qinisekisa ukuba amalungu aphambili olwakhiwo lomatshini aqulathe izinto ezingachaphazeleki lula kutshintsho lobushushu. Cinga ngebhulorho (umatshini we-X-axis), izixhasi zebhulorho, ireyile yesikhokelo (umatshini we-Y-axis), iibheringi kunye nebha ye-Z-axis yomatshini. Ezi nxalenye zichaphazela ngokuthe ngqo imilinganiselo kunye nokuchaneka komatshini, kwaye zenza iindawo zomqolo we-CMM.
Iinkampani ezininzi zenza ezi zinto nge-aluminium ngenxa yobunzima bayo obulula, ubuchule bokusebenza kunye nexabiso eliphantsi. Nangona kunjalo, izinto ezifana ne-granite okanye i-ceramic zingcono kakhulu kwi-CMM ngenxa yozinzo lwazo lobushushu. Ukongeza kwinto yokuba i-aluminium iyanda phantse ngokuphindwe kane kune-granite, i-granite ineempawu ezingcono zokudambisa ukungcangcazela kwaye inokubonelela ngomphezulu ogqwesileyo apho iibheringi zinokuhamba khona. I-Granite, eneneni, ibingumgangatho owamkelweyo ngokubanzi wokulinganisa kangangeminyaka.
Nangona kunjalo, kwi-CMMs, i-granite inenye ingxaki - inzima. Ingxaki kukuba, nokuba ngesandla okanye nge-servo, ikwazi ukuhambisa i-granite CMM kwii-axes zayo ukuze ithathe imilinganiselo. Omnye umbutho, i-LS Starrett Co., ufumene isisombululo esinomdla kule ngxaki: iHollow Granite Technology.
Le teknoloji isebenzisa iipleyiti zegranite eziqinileyo kunye neebhari ezenziweyo kwaye zihlanganiswe ukuze zenze amalungu esakhiwo angenanto. Ezi zakhiwo zingenanto zinobunzima obufana ne-aluminium ngelixa zigcina iimpawu zobushushu ezilungileyo zegranite. I-Starrett isebenzisa le teknoloji kumalungu enkxaso yebhulorho kunye nebhulorho. Ngendlela efanayo, basebenzisa i-ceramic engenanto kwibhulorho kwi-CMMs ezinkulu xa i-granite engenanto ingasebenzi.
Iibheringi. Phantse bonke abavelisi beCMM bashiye iinkqubo ezindala zokuthwala iirola, bekhetha iinkqubo zokuthwala umoya ezikumgangatho ophezulu kakhulu. Ezi nkqubo azifuni nxibelelwano phakathi kwebheringi kunye nomphezulu webheringi ngexesha lokusetyenziswa, nto leyo ebangela ukuba zingagugi. Ukongeza, iibheringi zomoya azinazo iindawo ezishukumayo kwaye, ngenxa yoko, azinazo ingxolo okanye ukungcangcazela.
Nangona kunjalo, ii-air bearings nazo zinezahluko zazo. Eyona nto ingcono kukukhangela inkqubo esebenzisa i-graphite enemingxuma njengesixhobo sokuthwala endaweni ye-aluminium. I-graphite kwezi bearings ivumela umoya ocinezelweyo ukuba udlule ngqo kwi-porosity yendalo ekwi-graphite, nto leyo ebangela ukuba kubekho umaleko womoya osasazeke ngokulinganayo kumphezulu we-bearings. Kwakhona, umaleko womoya oveliswa yile bearings ubhityile kakhulu - malunga ne-0.0002″. Ii-air bearings ze-aluminium eziqhelekileyo, kwelinye icala, zihlala zine-air gap phakathi kwe-0.0010″ kunye ne-0.0030″. I-air gap encinci ikhethwa kuba inciphisa ukuthambekela komatshini kokutsiba kwi-air cushion kwaye iphumela kumatshini oqinileyo, ochanekileyo nophindaphindwayo.
Ukukhetha ngesandla ngokuchasene ne-DCC. Ukugqiba ukuba uthenge i-CMM esetyenziswa ngesandla okanye ezenzekelayo kulula kakhulu. Ukuba indawo yakho yokuvelisa ephambili ijolise kwimveliso, ngoko ke ngokuqhelekileyo umatshini olawulwa yikhompyutha ngqo lolona khetho lungcono ekuhambeni kwexesha, nangona ixabiso lokuqala liya kuba phezulu. Ii-CMM ezisetyenziswa ngesandla zilungile ukuba zisetyenziselwa umsebenzi wokuhlola inqaku lokuqala okanye ubunjineli obubuyela umva. Ukuba wenza okuninzi kuzo zombini kwaye awufuni ukuthenga oomatshini ababini, cinga nge-DCC CMM ene-servo drives ezingathintelwa, ezivumela ukusetyenziswa ngesandla xa kufuneka.
Inkqubo yokuqhuba. Xa ukhetha i-DCC CMM, khangela umatshini ongena-hysteresis (backlash) kwinkqubo yokuqhuba. I-Hysteresis ichaphazela kakubi ukuchaneka kokubeka umatshini kunye nokuphindaphinda. Ii-Friction drives zisebenzisa i-direct drive shaft ene-precision drive band, nto leyo ebangela ukuba i-zero hysteresis kunye ne-minimum vibration.
Ixesha lokuthumela: Jan-19-2022