Imingcele yezobuchwepheshe kanye namazinga esisekelo se-granite mechanical.

 

I-Granite kade yaqashelwa njengento eyinhloko yezisekelo zemishini ngenxa yezakhiwo zayo ezihlukile, okuhlanganisa ukuminyana okuphezulu, ukuqina, kanye nokumelana nokwanda okushisayo. Ukuqonda amapharamitha wobuchwepheshe kanye namazinga ahlotshaniswa nezisekelo zemishini ye-granite kubalulekile konjiniyela nabakhiqizi abathembele ekunembeni nokuqina ezinhlelweni zabo zokusebenza.

Enye yemingcele eyinhloko yezobuchwepheshe yezisekelo zemishini ye-granite amandla ayo acindezelayo, ngokuvamile asukela ku-100 kuya ku-300 MPa. Lawa mandla aphezulu acindezelayo aqinisekisa ukuthi i-granite ingakwazi ukumelana nemithwalo ebalulekile ngaphandle kokuguqulwa, okuyenza ibe ilungele ukusekela imishini esindayo nemishini. Ukwengeza, i-granite ibonisa ama-coefficients okunweba okushisayo aphansi, ngokuvamile acishe abe ngu-5 kuya ku-7 x 10^-6 /°C, okunciphisa izinguquko zobukhulu ngenxa yokuguquguquka kwezinga lokushisa, okuqinisekisa ukusebenza okungaguquguquki ezindaweni ezihlukahlukene.

Ukucaba komhlaba kungenye indinganiso ebalulekile yezisekelo zemishini yegwadle. Ukubekezelela flatness kuvame ukucaciswa kuma-micrometers, ngokunemba okuphezulu kwezicelo ezidinga ukubekezelelana okuqinile njengo-0.005 mm imitha ngayinye. Leli zinga lokunemba libalulekile ezinhlelweni zokusebenza ezifana nemishini yokulinganisa yokuxhumanisa (ama-CMM) nemishini yokubona, lapho ngisho nokuchezuka okuncane kungaholela kumaphutha abalulekile okulinganisa.

Ngaphezu kwalokho, ukuminyana kwegwadle ngokuvamile kusuka ku-2.63 kuye ku-2.75 g/cm³, okunomthelela ekuzinzeni kwayo nasezimpahleni ezidambisa ukudlidliza. Lezi zici zibalulekile ekwehliseni umthelela wokudlidliza kwangaphandle, ngaleyo ndlela kuthuthukisa ukunemba kwamathuluzi azwelayo afakwe ezisekelweni zegwadle.

Sengiphetha, amapharamitha wobuchwepheshe kanye namazinga ezisekelo zemishini ye-granite adlala indima ebalulekile ekusetshenzisweni kwawo kuzo zonke izimboni ezihlukahlukene. Ngokunamathela kulokhu kucaciswa, abakhiqizi bangaqinisekisa ukwethembeka nokusebenza kwemishini yabo, ekugcineni kuholele ekusebenzeni okuthuthukisiwe nokusebenza ngokunemba ezinqubweni zokukhiqiza. Njengoba ubuchwepheshe buthuthuka, isidingo sezisekelo zemishini ye-granite yekhwalithi ephezulu sizoqhubeka nokukhula, kugcizelela ukubaluleka kokuqonda lawa mazinga obuchwepheshe.