Evaluation of the influence of the reaction rate of the thermodynamic subsystem on the dynamics of the cutting process in metalworking

OBRABOTKAMETALLOV Vol. 23 No. 2 2021 TECHNOLOGY Research methodology Let us consider as an example of processing the process of longitudinal turning of a part, while the axes of deformation of the tool will be three [33]. In fi gure 1, the traditional scheme of decomposition of deformations on the axis is revealed: the x – axis is the axial direction of deformations (mm), the y – axis is the radial direction of deformations (mm) and the z – axis is the tangential direction of deformations (mm), along these axes the force reaction from the cutting process is decomposed on the shaping movements of the tool ( F x , F y , F z ( H ) ), V x and V z (mm/s) of the feed and cutting speed, respectively, ω is the angular speed of rotation of the spindle (rad/s). Fig. 1. Axes of deformations and forces during turning To re fi ne the mathematical model of the cutting process, taking into account the effects that occur in the contact zone of the tool and the part, it is considered to represent a scheme of the cutting process through the prism of the formation of thermodynamic coupling in this system. (See Figure 2). Fig. 2. Heat dissipation zone Heat dissipation zone