Kinematic and Geometric Features of High-Speed Machining of Complex Surfaces of Parts with Rotating Tools on CNC Machines

The purpose of the work is to increase the productivity of machining complex-profile surfaces of parts. To achieve this goal, the tasks of studying the kinematic and geometric features of the use of rotating cutting tools are solved, providing processing of cylindrical, conical, spherical and flat surfaces of a part at one workplace in one or two installations. Analytical research methods are used, which made it possible to obtain formulas for calculating the linear processing speed when the tool is embedded in the workpiece, in the cutting zone and at the tool exit from the workpiece, to determine changes in the inclination angle of the tool cutting edge in the instrumental, static and kinematic coordinate systems. Schemes for machining the surfaces of a part on a CNC machine by interpolating the cutting trajectory by rectilinear movements of the cutting edge are considered. The influence of the discreteness of the cutting edge movements on the quality of the resulting surface of the part at the recommended values of the cutting mode is estimated. The research results can be used in the development of control programs for CNC machines by selecting a rational machining scheme with tangential movement of the cutting edge and adjusting the values of linear velocity during embedding, during the cutting process and the exit of the cutting edge from the workpiece, which ensures an increase in machining productivity.

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