Izinto zokwakha ezizinzile nge-thermal. Qinisekisa ukuba amalungu aphambili okwakhiwa komatshini aqukethe izinto ezingenakuchaphazeleka kakhulu kwiinguqu zeqondo lokushisa. Cinga ibhulorho (umatshini we-X-axis), ibhuloho ixhasa, isikhokelo sikaloliwe (umatshini we-Y-axis), iibheringi kunye nebar ye-Z-axis yomatshini. Ezi nxalenye zichaphazela ngokuthe ngqo imilinganiselo yomatshini kunye nokuchaneka kweentshukumo, kwaye zenza amacandelo omqolo weCMM.
Iinkampani ezininzi zenza la macandelo nge-aluminiyam ngenxa yobunzima bayo obulula, ubuchule kunye neendleko eziphantsi. Nangona kunjalo, izixhobo ezifana negranite okanye i-ceramic zingcono kakhulu kwii-CMM ngenxa yokuzinza kwazo kwe-thermal. Ukongeza kwinto yokuba i-aluminiyam iyanda ngokuphindwe kane ngaphezu kwegranite, igranite ineempawu eziphezulu zokungcangcazela kwaye inokubonelela ngomphezulu ogqwesileyo womphezulu apho iibheringi zinokuhamba khona. Igranite, enyanisweni, ibe ngumgangatho owamkelwa ngokubanzi wokulinganisa iminyaka.
Kwii-CMM, nangona kunjalo, igranite ine-drawback enye-inzima. Ingxaki kukuba ukwazi, nokuba kungesandla okanye nge-servo, ukuhambisa i-granite CMM ijikeleze kwii-axes zayo ukuthatha imilinganiselo. Omnye umbutho, i-LS Starrett Co., ifumene isisombululo esinomdla kule ngxaki: I-Hollow Granite Technology.
Le teknoloji isebenzisa iipleyiti zegranite eziqinileyo kunye nemiqadi eyenziwe kwaye idityaniswe ukwenza amalungu angenanto. Ezi zakhiwo zinomgongxo zinobunzima obufana ne-aluminiyam ngelixa zigcina iimpawu zobushushu zegranite. U-Starrett usebenzisa le teknoloji kuzo zombini ibhulorho kunye namalungu enkxaso yebhulorho. Ngendlela efanayo, basebenzisa i-ceramic emngxunyeni kwibhulorho kwezona zikhulu zeCMM xa igranite ingenamsebenzi.
Iibheringi. Phantse bonke abavelisi be-CMM baye bashiya ii-roller-bearing systems ezidala ngasemva, bekhetha iinkqubo ezikude eziphezulu zomoya. Ezi nkqubo zifuna unxibelelwano phakathi kwe-bearing kunye ne-bearing surface ngexesha lokusetyenziswa, okubangela ukunxitywa kwe-zero. Ukongezelela, iibheringi zomoya azinamalungu ashukumayo kwaye, ngoko ke, akukho ngxolo okanye ukungcangcazela.
Nangona kunjalo, iibheringi zomoya zikwanomohluko wazo wendalo. Ngokufanelekileyo, khangela inkqubo esebenzisa i-graphite ene-porous njengento yokuthwala endaweni ye-aluminium. Igraphite kwezi bheringi ivumela umoya ocinezelweyo ukuba udlule ngokuthe ngqo kwi-porosity yendalo ekhoyo kwigraphite, okukhokelela kumaleko womoya osasazeke ngokulinganayo kumhlaba wokuthwala. Kwakhona, umaleko womoya oveliswa yile mveliso ubhityile kakhulu-malunga ne-0.0002 ″. Ngakolunye uhlangothi, iibheringi ze-aluminiyam eziqhelekileyo, zihlala zinesithuba somoya phakathi kwe-0.0010" kunye ne-0.0030". Umsantsa omncinci womoya uyakhethwa kuba unciphisa utyekelo lomatshini lokugxumeka kwi-cushion yomoya kwaye kukhokelela kumatshini ongqongqo ngakumbi, ochanekileyo nophindaphindwayo.
Incwadi vs. DCC. Ukumisela ukuba uthenge i-CMM yesandla okanye i-automated ilula kakhulu. Ukuba indawo yakho yokuvelisa eyona nto iphambili ijolise kwimveliso, ke ngokuqhelekileyo umatshini olawulwa yikhompyutha ngokuthe ngqo lolona khetho lufanelekileyo ekuhambeni kwexesha, nangona iindleko zokuqala ziya kuba phezulu. Ii-CMM zeManuwali zifanelekile ukuba ziza kusetyenziswa ngokuyintloko kumsebenzi wokuhlola inqaku lokuqala okanye kubunjineli obubuyisela umva. Ukuba wenza kancinane kokubini kwaye awufuni ukuthenga oomatshini ababini, qwalasela i-DCC CMM ene-disengagable servo drives, evumela ukusetyenziswa ngesandla xa kuyimfuneko.
Inkqubo yokuqhuba. Xa ukhetha i-DCC CMM, khangela umatshini ongenalo i-hysteresis (backlash) kwinkqubo yokuqhuba. I-Hysteresis ichaphazela kakubi ukuchaneka komatshini kunye nokuphindaphinda. Iidrive zefriction zisebenzisa ishafti yedrive ethe ngqo enebhendi yokuqhuba echanekileyo, ekhokelela kwi-zero hysteresis kunye nokungcangcazela okuncinci.
Ixesha lokuposa: Jan-19-2022