RT Journal Article SR Electronic A1 Kozbagarov, Rustem A1 Amanova, Marzhana A1 Kamzanov, Nurbol A1 Bimagambetova, Lalita A1 Imangaliyeva, Aizhan T1 Investigation of Wear of Cutting Part of Polygonal Knife Car Graders in Different Ground Conditions JF Communications - Scientific Letters of the University of Zilina YR 2022 VO 24 IS 4 SP D229 OP D238 DO 10.26552/com.C.2022.4.D229-D238 UL https://komunikacie.uniza.sk/artkey/csl-202204-0025.php AB The wear of cutting elements of auto graders allowed in practice causes an increase in the cutting force by 3 to 4 times, the energy intensity of the cutting process by 1.4 to 3 times, the cost of soil development by 8 to 15 % with a decrease in productivity by 10 to 30 %. This increases the stress state of the entire machine and reduces its operational reliability. Excessive wear of cutting elements leads to economic inexpediency or practical impossibility of further operation of machines.