Machinery & Energetics

The work is devoted to the study of the processes of wear of the blades of cultivator paws for various types of hardening and their influence on the change in traction resistance of a tillage unit. The article presents the dependencies for predicting changes in the thickness of the cutting edges hardened by various options on the linear wear of the blade along the width and angle of its sharpening. Extended known dependency predicting changes in the traction resistance of the unit during operation, by introducing a relationship that allows you to take into account the compression and cleavage resistance of the soil layer, as well as the resistance of the soil to indentation by the thickness of the cutting edge. The effect of the thickness of the cutting edge of the cultivator paws on the change in the traction resistance of the aggregate is theoretically substantiated. An analysis of the obtained graphical dependences of the change in the traction resistance of cultivator paws with volumetric and surface hardening on the value of linear wear showed that the traction resistance of cultivator paws with surface hardening is 27-30% less than during operation of paws with volumetric hardening. Surface hardening of the blades of cultivator paws will reduce the cost of performing technological operations on tillage due to a decrease in the traction resistance of tillage machines due to an increase in the process of selfsharpening and stabilization of the thickness of the cutting edge in the process exploitation.

hardening, blade, wear resistance, resource, durability, self-sharpening, resistance