Mpukutu wakumbuyo ndi mpukutu womwe umathandizira ntchitoyogudubuzandipo ndi mpukutu waukulu komanso wolemera kwambiri womwe umagwiritsidwa ntchito pogudubuza mphero. Thegudubuzaakhoza kuthandizira zapakatikatigudubuzapofuna kupewa kupatuka kwa ntchito mpukutu ndi zimakhudza pa zokolola ndi khalidwe la mbale ndi Mzere anagubuduza mphero. Makhalidwe abwino a mpukutu wosunga zobwezeretsera ndi kuuma kwapamtunda, kulimba kwabwino komanso kusanjikiza kozama kwa mpukutuwo, mphamvu yabwino komanso kulimba kwa khosi la roll ndi roll body. mpukutu wosunga zobwezeretsera uli ndi kukana kwamphamvu kwambiri komanso kukana kupukuta, zotsutsana ndi ngozi zolimba. Mipukutu yachitsulo yopangidwa ndi 1000mm kapena kuchepera imapangidwa ndi 86CrMoV7 ndi 9Cr2Mo. Mpweya wake wa carbon ndi 0.80% mpaka 0.95% ndipo Cr ndi 2%.Ikhoza kugwiritsidwa ntchito pa mphero zina zazing'ono. Ma Cr4 ndi Cr5 back up rolls ali ndi carbon content ya 0.4% mpaka 0.6% ndi Cr content ya 4% mpaka 5%, yoyenera zitsulo zothamanga kwambiri komanso zitsulo zothamanga kwambiri.

Kwa mphero zina zing'onozing'ono, mipukutu yosungira zitsulo za 1000mm kapena kuchepera imapangidwa ndi 86CrMoV7 ndi 9Cr2Mo, zomwe zili ndi mpweya wake ndi 0.80% mpaka 0.95% ndipo Cr zili 2%.
Chitsulo cha Cr4 ndi Cr5 zosunga zobwezeretsera chili ndi mpweya wa 0.4% mpaka 0.6% ndi Cr zomwe zili 4% mpaka 5%. Kuwumitsidwa, kukana kuvala, kukana kupukuta, kusatopa komanso kukana ngozi kwa mipukutu yosunga zobwezeretsera kumachotsa zochitika zamtundu wa mpukutuwo komanso ngozi yoduka. Cr4, Cr5 zitsulo zosunga zobwezeretsera ndizoyenera zitsulo zothamanga kwambiri komanso zitsulo zothamanga kwambiri.

Makhalidwe a High-speed steel roll (HSS roll)

1. Zida zopukutira zachitsulo zothamanga kwambiri zimakhala ndi aloyi apamwamba kwambiri monga vanadium, tungsten, chromium, molybdenum, ndi niobium. Mitundu ya carbides mu mawonekedwe a mpukutuwo ndi MC ndi M2C. Poyerekeza ndi masikono achitsulo okhala ndi faifi tambala-chromium, voliyumu yodutsa chitsulo imakhala yokwera nthawi iliyonse, zomwe zimapulumutsa nthawi yosintha, kumathandizira magwiridwe antchito a mphero ndikuchepetsa mtengo wopangira.

2. Mipukutu yachitsulo yothamanga kwambiri imakhala ndi kutentha kwabwino. Pa kutentha kozungulira, pamwamba pa mpukutuwo amakhala ndi kuuma kwakukulu komanso kukana kuvala bwino.
Mipukutu yachitsulo yothamanga kwambiri imakhala ndi kuuma bwino, ndipo kuuma kochokera pamwamba pa mpukutuwo mpaka mkati mwa gawo logwira ntchito sikucheperachepera, potero kuonetsetsa kuti mipukutuyo imakhala ndi kukana kwabwino kofanana kuchokera kunja kupita mkati.

3. Pogwiritsa ntchito mipukutu yachitsulo yothamanga kwambiri, pansi pazikhalidwe zabwino zoziziritsa, filimu yopyapyala ndi wandiweyani ya oxide imapangidwa pamwamba pa thupi la roll. Kanema wa yunifolomu, woonda komanso wandiweyani wa okusayidi amatha kukhalapo kwa nthawi yayitali osagwa, zomwe zimapangitsa kuti zitsulo zothamanga kwambiri zisavale zosagwira bwino.

4. Mipukutu yachitsulo yothamanga kwambiri imakhala ndi coefficient yowonjezera yazinthu zazikulu komanso kuyendetsa bwino kwamafuta. Mipukutu ya HSS ikupitirirabe kuchepa chifukwa cha kufalikira kwa zipangizo zachitsulo zothamanga kwambiri. Panthawi yogubuduza, kusintha kwa groove kumakhala kochepa, ndipo kukula kwa dzenje kumasungidwa kwa nthawi yayitali, makamaka pakugubuduza bar kapena rebar, zomwe zimathandiza kwambiri kuwongolera kulolerana koyipa kwa zinthu zogubuduza.
5. Pakatikati pa chitsulo chothamanga kwambiri cha centrifugally chimapangidwa ndi chitsulo cha alloy ductile, motero, mphamvu ya mpukutu wa khosi imakhala yolimba.

Kugwiritsa ntchito
Chigayo chopukutira, chitsulo chogawira mphero, mphero yothamanga kwambiri, mphero yopapatiza yotentha yotentha, gawo ndi mphero yachitsulo.