Morochko V. Improving the efficiency of grinding cylindrical surfaces with an oriented circle, filled with different feeds on the working and calibration sections

The dissertation is devoted to increasing the efficiency of grinding of cylindrical surfaces of details by periphery of a circle due to orientation of the tool and its editing with the various supplies on working and calibration sections. The first section analyzes the existing methods of abrasive treatment of cylindrical surfaces of parts with parallel and crossed tool axes and parts, three-dimensional models of forming systems of machines, tool and machined surfaces, removal of allowance. It has been found that the development of new methods of grinding with crossed axes of tools and parts is a powerful reserve to intensify the grinding process, which will significantly improve the accuracy and productivity of processing and ensure the required quality of cylindrical surfaces. The second section describes the method of conducting experimental studies of the process of grinding the cylindrical surface of the shaft by the periphery of the oriented circle, filled with different feeds on the working and calibration sections. The list of necessary equipment and its technical characteristics is given. The third section presents modular three-dimensional modeling of the process of forming the cylindrical surface of the part when grinding the periphery of the oriented circle in the blunting mode. Three-dimensional geometric modular models of the abrasive wheel surface and details have been developed. Based on the obtained spatial model, the distribution of the allowance along the cutting section of the tool during grinding with an oriented circle has been worked out. The research of the components of grinding forces taking into account the cutting and deforming grains has been conducted. A modular three-dimensional model of straightening the peripheral section of a grinding wheel with a single-crystal diamond tool for grinding with crossed tool axes and parts has been developed. The dynamic calculation of the spindle assembly has been performed. The fourth section is devoted to experimental studies of the process of finishing single-pass grinding of the cylindrical surface of the shaft by the periphery of the oriented circle, filled with different feeds on the roughing and calibration sections, in the blunting mode. According to the proposed treatment scheme, the maximum allowance will be removed by the part of the periphery of the circle that will first cut into the workpiece, evenly decreasing to the calibration area, which forms the final accuracy and does not participate in rough cutting allowance and therefore has high stability.