The Improvement of the Digging Process with the Sliding Surface Consideration

DOI : http://dx.doi.org/10.13005/bbra/1983

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The article describes the energy intensity of the soil digging process and the nature of changes in the values that make up the cutting forces acting on the actuator, which are necessary for effective interaction with soil. The main goal of the research on the process of soil cutting is to find ways for the least energy-intensive and most productive separation of soil from the array. We took into account the interaction schemes of actuators with soil, as it is important both in the analysis of existing earth-moving machines operation and in the creation of new machines. We experimentally determined that a cutting angle, energy consumption, as well as a necessary vertical pressure on the cutting edge of the blade during the introduction into the soil have a significant impact on the soil digging process. We examined soil digging processes, it revealed that during the earthmoving machines operation, soil destruction occurs both due to shear strain and separation. We used the methods and equations of the theory of limiting balance that allowed deriving a series of equations to determine the resistance to soil cutting. We determined the total resistance to cutting, taking into account the resistance to chipping and crushing of soil with the cutting edge of the knife but not taking into account the resistance to the formation of the side chipping shells for flat blades. The comparison results of the calculated and experimental data on the cutting resistance of different soils, corresponding to the practical range of applied cutting angles for actuator knives of earth-moving machines, are presented.

Blade; bulldozer; cutting soil; earthmoving machines; soil