Iimpawu eziphambili zokuchaneka kweetyhubhu eziqaqambileyo :
Umbhobho ochanekileyo eludongeni, ukugqiba umgangatho ophezulu, i-oxide yensimbi engekho ukushisa, udonga lwangaphakathi lwentsimbi yokucoceka okuphezulu ukumelana noxinzelelo oluphezulu, i-deformation ebandayo, ukuvutha, ukubethelela akukho zintanda, kunokwenza iintlobo ezahlukeneyo ze-deformation kunye nokulungiswa koomatshini. . Umbala wombhobho: omhlophe ngokukhanya, kunye nokucwebezela kwentsimbi ephezulu.

Iinjongo eziphambili zokuchaneka kweetyhubhu eziqaqambileyo:
Imoto, oomatshini kunye nezinye izincedisi ezisetyenziselwa ukuchaneka umbhobho wentsimbi, ukugqiba iimfuno eziphezulu zoomatshini. Kwaye ngoku kubasebenzisi bokuchaneka kwentsimbi echanekileyo, gqiba abasebenzisi bemfuno ephezulu, kwaye ngenxa yokuchaneka okuphezulu kokunyamezela kombhobho wokukhanya kunokugcinwa kwi-2-8 yocingo, abasebenzisi abaninzi bomatshini bokugcina abasebenzi, izixhobo, ilahleko yexesha, intsimbi engenamthungo. umbhobho okanye ibha iguqulwa kancinane ibe ngumbhobho wokukhanya ochanekileyo.