Uhlalutyo loKhetho lohlobo lweZixhobo zoVavanyo loBulukhuni kwiMisebenzi emikhulu nenzima

Njengoko kusaziwa, indlela nganye yokuvavanya ubulukhuni—nokuba kusetyenziswa iBrinell, Rockwell, Vickers, okanye abavavanyi bobulukhuni beLeeb ephathekayo—inemida yayo kwaye akukho nanye esebenzayo kuyo yonke indawo. Kwizinto zokusebenza ezinkulu nezinzima ezinemilinganiselo engalinganiyo yejometri njengaleyo iboniswe kwimizekelo yemizobo engezantsi, abavavanyi bobulukhuni beLeeb ephathekayo ngoku basetyenziswa kakhulu kwiindlela ezininzi zokuvavanya ukulawula ubulukhuni babo.

Umvavanyi wobulukhuni weLeeb usebenzisa indlela yokuvavanya eguquguqukayo, kwaye kukho izinto ezininzi ezichaphazela ukuchaneka kovavanyo lwayo lobulukhuni, njenge-elastic modulus yezinto, ukuguguleka kwebhola ye-indenter, uburhabaxa bomphezulu wesixhobo somsebenzi, i-radius yokugoba, kunye nobunzulu bomaleko wobulukhuni bomphezulu. Xa kuthelekiswa neendlela zokuvavanya ezingashukumiyo zabavavanyi bobulukhuni beBrinell, Rockwell, kunye neVickers, impazamo yayo yokuvavanya inkulu kakhulu. Ke, ukuba kufuneka ukuchaneka okuphezulu kuvavanyo lobulukhuni, singamkhetha njani umvavanyi wobulukhuni?

Ngexesha lenkqubo yokuvavanya izixhobo zokusebenza ezinkulu nezinzima kusetyenziswa izixhobo zokuvavanya ubunzima eziqhelekileyo, ukulayishwa kwezinto zokusebenza ngaphambi kovavanyo, ukulayishwa nokukhutshelwa komvavanyi wobunzima ngexesha lovavanyo, kunye nokukhutshelwa kwezinto zokusebenza emva kovavanyo konke kuya kuzisa umthwalo omkhulu womsebenzi kwinkqubo yokusebenza. Ngoko ke, sifanele simkhethe njani umvavanyi wobunzima?

Kucetyiswa ukuba kugqitywe yonke inkqubo yovavanyo, kusetyenziswe izixhobo zokuvavanya ubunzima ezimbini ezingaphezulu ezinesakhiwo sentloko yokuphakamisa, ezifana nesixhobo sethu sokuvavanya ubunzima seRockwell esikwi-intanethi esenziwe ngokwezifiso, i-HRZ-150GE kunye nesixhobo sokuvavanya ubunzima seRockwell esizenzekelayo, i-SCR3.0.

Esi sisombululo sovavanyo lobunzima senza uvavanyo lobunzima lweRockwell luhambelane nemigangatho yovavanyo lobunzima bamazwe ngamazwe (njenge-ISO 6506-1:2014 kunye ne-ISO 6507-1:2018). Ngokufanayo, kuvavanyo lobunzima beVickers kunye neBrinell, isakhiwo sokuphakamisa ngokuzenzekelayo sentloko yovavanyo singasetyenziswa. Okwangoku, siyahlangabezana neemfuno zovavanyo oluchanekileyo kakhulu lwezinto ezisetyenziswayo kunye nemveliso esebenzayo.