PT - JOURNAL ARTICLE AU - Kozbagarov, Rustem AU - Amanova, Marzhana AU - Kamzanov, Nurbol AU - Bimagambetova, Lalita AU - Imangaliyeva, Aizhan TI - Investigation of Wear of Cutting Part of Polygonal Knife Car Graders in Different Ground Conditions DP - 2022 Oct 26 TA - Communications - Scientific Letters of the University of Zilina PG - D229--D238 VI - 24 IP - 4 AID - 10.26552/com.C.2022.4.D229-D238 IS - 13354205 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.