Global Journal of Science Frontier Research, D: Agriculture and Veterinary, Volume 23 Issue 4

Figure 3: Changing Blade Parameters the Ploughshare t under wear under the Action of Forces Q and R Consequently, the intensity of blade wear depends mainly on the magnitude of the forces P and R . Now we will try to determine their values through the physical and mechanical properties of the soil and the structural dimensions of the blade. The component of the force Q acting on the front surface of the ploughshare consists of the forces of normal pressure P and the weight of the soil G . The normal soil pressure P acting on the front surface of the ploughshare can be determined by the weight of the soil particles G and the dynamic pressure on the surface of the blade of the ploughshare N д , i.e. (8) Using the theorem on the change in the amount of motion and the results of the study of M.M. Severnev [8] and G.N. Sineokov [9], we determine the force of dynamic pressure on the direction of the normal to the surface О 1 К (9) Where а and b – thickness and width of the soil layer; δ – soil density; V п – translational speed of the working body; β and γ – angles of installation of the working body relative to the bottom and wall of the furrow; α – blade sharpening angle. The magnitude of the force projection vector G on the direction of the normal to the blade surface can be defined as (10) Where л L – blade length of the working body; g – acceleration of gravity. Then substituting expressions (9) and (10) into (8) we get . (11) As can be seen from formula (11), the dynamic pressure to the blade surface is directly proportional to the parameters of the formation, the density of the soil and the speed of movement of the unit. In the presence of an occipital chamfer, the reactive force R is determined by the formula [17] (12) Where Н - average soil hardness at the depth of treatment, Мпа ;F – the area of the deformable layer, sm 2 ; К 1 - conversion factor that takes into account the influence of the shape and size of the occipital chamfer; b- the width of the ploughshare, h s - height of the occipital chamfer, l s - width of the occipital chamfer, V s - volume of the washed-off soil, g 0 - the coefficient of volumetric crumpling of the soil; 1 0 g - the volumetric crumpling coefficient selected during static tests, i.e. at a deformation rate equal to zero; ϑ K - a coefficient that takes into account the change in the , , R= + Global Journal of Science Frontier Research ( D ) XXIII Issue IV Version I Year 2023 8 © 2023 Global Journals Evaluation of the Effectiveness of using the Plowshare