DETERMINATION OF CUTTING TILLAGE DISK PARAMETER

Abstract

Disk working elements are classified by continuity of the blade, forms of the disk and cutout and type of the cutout. Decrease in power consumption while introducing a segment of a spherical cut disk is possible at transformation of the external cutting edge towards a concave surface of the working element that corresponds to a difficult type of loading. The methods of calculation of power consumption at introduction of the forward cutting edge and curves forming a segment surface were developed. Normal and tangent efforts from the soil affect the platform of the curve when penetration. The coordinates of curve points of the transformed segment surface can be received by calculation. With usage of the SPSS Statistics program the curves are approximated by a square parabola. Geometrical parameters of the disk, an angle of attack, the travel speed of the movement are considered through a deepening trajectory which is also approximated by a square parabola. The soil as an object of processing is presented by deformation coefficient, the angles of external friction, compressive strength. The calculation was performed at the following basic data: the size of a horizontal single interval is 0.005 m; the size of a vertical single interval is 0.004 m; the absolute humidity of the loamy soil equals 20.73 persent; the hardness is 3.3 MPa; the width of crumbling curves is 0.01 m; the limit of soil solidity on compression is 154 175 Pa; the normal tensions corresponding to coefficient of the soil deformation made 45 178 Pa. When in loamy soil external cutting edge transformation is 1, 2 and 3 degrees, so an average value of a horizontal component of traction resistance is less than the analyzed size by 15,52, 15,79 and 13,55 percent respectively. The segment with the transformation angle of the external cutting edge equaled 2 degrees has a minimum value of average traction resistance.