Bifurcations of Deep Hole Drilling Process

Modern control of the cutting process can only be based on the thorough study of the dynamics of the technological system that allows revealing different mechanisms of the processes occurring in the cutting zone. The article shows the bifurcations inherent in the process of deep drilling that allows explaining a number of phenomena that affect the tool breakdown and development of typical defects of the deep holes mechanical processing. The formation of bifurcations in the deep drilling process is shown based on the mutual influence of the cutting force and the force of the contact interaction between the surface of the hole and the side face of the drill. The forces, appearing in the cutting zone create the non-linear dynamic characteristics of the cutting process which depend on the radial float of the tools. The radial floats of drill are characteristic of the deep drilling of small-diameter bores.