Identification of optimal switching coordinates of processing cycles on metal cutting machines

Abstract

The traditional algorithm of replacing tools and readjusting tool subsystems bases on determining the critical wear of the tool where the evaluation for example bases on statistical characteristics of the development of wear. Many methods for diagnosing are developed, including those based on observing the dynamic properties of the cutting process. As a rule, these methods use information about the evolutionary rearrangement of process properties as the wear develops. In recent years, algorithms for changing the programmed trajectories of the machine’s Executive elements in accordance with the evolutionarily changing properties of the cutting system were used to improve efficiency. In this case, for example, the cutting speed is characterized by a certain optimal trajectory, and it decreases as wear develops. Therefore, there is a problem of determining the coordinates of the tool replacement by the criterion of the minimum cost of production. In this case, between the switching of cycles, the trajectory of speed of the cutting path is maintained such that the power of irreversible transformations of the applied energy in the cutting zone remains optimal and corresponding to the minimization of the wear intensity. Cycle switching coordinates should be selected based on the criterion of minimizing the reduced cost of manufacturing a batch of parts. The article is devoted to the definition of these coordinates.