Influence of selective process interfering on the workpiece fixture dynamics in precision honing

Abstract

In the area of precision machining processes, honing is of central importance for manufacturing high-precision functional components according to the current state of technology. This precision machining process usually represents the last machining step in the process chain and fulfills high requirements in terms of shape, dimensional and surface quality of less than 1 µm. Therefore, the knowledge of the process dynamics of the tool-workpiece fixture system is of major importance. This paper focuses on the process dynamics of the workpiece fixture in internal long-stroke honing for bore diameters less than 10 mm. In general, the dynamics of a moving system can be described by mass, stiffness and damping. These variables are experimentally included in the investigations as interfering variables in the workpiece fixture and the process dynamics are monitored using eddy current sensors. A gimbal-mounted workpiece fixture with four degrees of freedom is applied for this purpose. The aim of this work is the analysis of the dynamic behavior by variation of the interfering variables and the determination of the process limits. For this purpose, elaborate experiments are carried out and extensive results are presented.