Okwezigayo ezishisayo,ukusekela rollersdlala indima ebalulekile kuyo yonke inqubo.Le miqulu, eyaziwa nangokuthiimiqulu yomsebenzi or high-speed steel rolls, ukunikeza ukwesekwa nokuzinza kuimiqulu eshisayongesikhathi sokugoqa.Zibalulekile ekuqinisekiseni ikhwalithi nokusebenza kahle kokusebenza kwensimbi.

I-hot rolling yinqubo lapho ingot yensimbi noma i-slab ishiselwa ezingeni lokushisa eliphezulu bese idlula ochungechungeni lwamarola ukuze kuncishiswe ukujiya kwayo nokuyilungisa ngendlela oyifunayo.Ama-roller ashisayo, athintana ngqo nensimbi, abhekene nenani elikhulu lokucindezela nokushisa phakathi nenqubo.Yilapho ama-roller okusekela aqala khona ukudlala.

I-roller yokusekela itholakala ngemuva kwe-roller yokushisa futhi isebenza njengesistimu yokusekela ukuvimbela i-roller yokushisa ekugobeni noma ukukhubazeka ngaphansi kwengcindezi enkulu.Asebenza ngokuhambisana namaroli ashisayo ukuze aqinisekise ukuncipha okulinganayo nokungaguquguquki kogqinsi lwensimbi.Ngaphandle kwama-roller asekelayo, ama-roller okushisa azogqoka kalula, okuholela emikhiqizweni yokugcina yekhwalithi ephansi.

Ngaphezu kokuhlinzeka ngokusekela, ama-roller asekelayo asiza ukugcina ukuma nokuqondanisa kwe-roller yokushisa, okubalulekile ekufezeni umkhiqizo wokuphela oyifunayo.Ngokuvamile zenziwa ngensimbi enesivinini esikhulu, into eyaziwa ngokuhlala isikhathi eside kanye nokumelana nezinga lokushisa eliphezulu, okuyenza ilungele izimo ezinzima zezigayo ezigoqayo.

Kubalulekile ukuthi izigayo ezishisayo zihlole njalo futhi zigcine amaroli azo okusekela ukuze kuqinisekiswe ukusebenza kahle.Noma yimuphi umonakalo noma ukuguga kwamarola ayisipele kungaba nomthelela omkhulu kukhwalithi nokusebenza kahle kwenqubo yokugoqa.Ngokutshala imali kuma-backup rolls ekhwalithi ephezulu nokusebenzisa izinqubo zokunakekela ezifanele, izigayo ezishisayo zingathuthukisa ukwethembeka okuphelele kanye nokukhiqiza kwemisebenzi yazo.

Ngamafuphi, i-backup roller iyingxenye ebalulekile yokugaya okushisayo futhi idlala indima ebalulekile ekusekeleni nasekugcineni ukusebenza kwesigayo esishisayo.Ukuqonda ukubaluleka kwazo kanye nokutshala imali ekunakekeleni kwazo kubalulekile ekuzuzeni ikhwalithi ephezulu nemiphumela engaguquki enqubweni yokugingqa insimbi.