TIME-DOMAIN DYNAMIC MODELING OF THE EXTERNAL PLUNGE GRINDING PROCESS

This paper presents a time-domain dynamic model of the external plunge grinding process. The model consists of a block-based simulation tool that substantially simplifies the inclusion of different effects, the variation of process or machine parameters, and the study of the para meters which influence the process. Since it is a time-domain model, n on-linear effects can be considered. Particular attention is paid to t he inclusion in the model of the interference phenomenon between two c onsecutive workpiece revolutions. The inclusion of this phenomenon is particularly important when trying to explain why process parameters w hich cause unstable conditions during stability analyses can, however, lead to acceptable workpiece results. The model permits the visualisa tion of this lobe destruction effect between consecutive workpiece rev olutions. The actual infeed constitutes the model input, i.e. differen t infeed rates and spark-out time. The importance of the different mod el parameters is discussed within the paper, with special attention be ing given to the application of this model to the grinding with CBN wh eels. (C) 1997 Elsevier Science Ltd.