Kutheni ibhulorho iCMM ikhethe igranite njengezinto zokubeka ibhedi?

I-bridge CMM, eyaziwa ngokuba ngumatshini wokulinganisa uhlobo lwebridge, sisixhobo esibalulekileyo esisetyenziselwa ukulinganisa iimpawu zomzimba zento. Enye yezona zinto zibalulekileyo zebridge CMM zizinto zebhedi apho into iza kulinganiswa khona. I-Granite isetyenzisiwe njengezinto zebhedi zebridge CMM ngezizathu ezahlukeneyo.

I-Granite luhlobo lwelitye eliyi-igneous elenziwa ngokuphola nokuqina kwe-magma okanye i-lava. Iyakwazi ukumelana nokuguguleka, ukubola, kunye nokuguquguquka kobushushu. Ezi mpawu ziyenza ibe yinto efanelekileyo yokusetyenziswa njengebhedi ye-CMM yebhulorho. Ukusetyenziswa kwe-granite njengezinto zebhedi kuqinisekisa ukuba imilinganiselo ethathiweyo isoloko ichanekile kwaye ichanekile, njengoko ibhedi ingagugi okanye ingabi nabume ngokuhamba kwexesha.

Ukongeza, i-granite yaziwa ngokuba ne-thermal expansion coefficient yayo ephantsi, nto leyo ethetha ukuba ayikhuli okanye ayinciphisi kakhulu ngenxa yotshintsho kubushushu. Oku kubalulekile kuba ukuguquguquka kobushushu kunokubangela ukuba imilinganiselo ethathwe yi-CMM ingachaneki. Ngokusebenzisa i-granite njengezinto zokubeka ubushushu, i-CMM inokubuyisela naluphi na utshintsho kubushushu, iqinisekise imilinganiselo echanekileyo.

I-granite ikwayinto ezinzileyo kakhulu. Ayiguquguquki xa iphantsi koxinzelelo, nto leyo eyenza ukuba ibe yinto efanelekileyo yokusetyenziswa kwi-CMM yebhulorho. Olu zinzo luqinisekisa ukuba into elinganiswayo ihlala imile kuyo yonke inkqubo yokulinganisa, ukuqinisekisa ukuba kuthathwa imilinganiselo echanekileyo.

Enye inzuzo yegranite kukukwazi kwayo ukuthomalalisa ukungcangcazela. Nakuphi na ukungcangcazela okwenzeka ngexesha lenkqubo yokulinganisa kunokubangela ukungachaneki kwimilinganiselo ethathiweyo. Igranite inamandla okufunxa ezi ngcangcazela, iqinisekisa ukuba imilinganiselo ethathiweyo isoloko ichanekile.

Ukuqukumbela, ukusetyenziswa kwegranite njengezinto zokubeka ibhedi kwibhulorho iCMM kuneenzuzo ezininzi. Yinto ezinzileyo, echanekileyo, nethembekileyo eqinisekisa ukuba kuthathwa imilinganiselo echanekileyo ngalo lonke ixesha. Le nto ayigugi, irhabaxa, kunye nokuguquguquka kobushushu, nto leyo eyenza ukuba ibe lukhetho olufanelekileyo kwindawo enzima yelebhu yemetrology. Ngokubanzi, ukusetyenziswa kwegranite njengezinto zokubeka ibhedi lukhetho olukrelekrele kuyo nayiphi na intlangano efuna ukulinganiswa ngokuchanekileyo nangokuchanekileyo kwezinto ezibonakalayo.