INCREASING THE ACCURACY OF PROCESSING PARTS ON CNC LATHES

The article examines the effect of the movement trajectory of the cutting tool on the longitudinal cross-sectional accuracy of the details processed on digitally controlled (DC) lathes. Opportunities to improve the accuracy of details are analyzed. The article investigates the influence of the trajectory of the cutting tool on the accuracy of the longitudinal section of parts processed on lathes with computer numerical control (CNC). The possibilities of increasing the accuracy of parts are analyzed. The article describes a method for calculating the trajectory of a turning tool on a machine with numerical control to compensate for elastic deformation when processing of the workpiece. In the process of turning bodies of rotation with low rigidity, elastic deformations occur under the action of cutting force, which negatively affects the accuracy of the machined surface. As a result, an error appears in the form of barrel-shaped, saddle-shaped, or a combination of these errors, depending on the stiffness machine and its individual parts. Based on the calculation of deformation at a constant depth of cut, it is proposed to determine the error, which must be further compensated using the given calculation method. It allows compensation to be carried out by predistortion the trajectory at the stage of programming the control program. Thus, during the turning process, the required diameter will be obtained with minimal errors, which in turn will have a positive effect on the reduction additional processing to remove form errors and improve the quality of part processing.