Study of impact of tool wear on stable region for die steel cutting process

摘要

The stability of the process systems has an obvious impact on the cutting quality, seeking cutting process stability region is an important aspect of the cutting mechanism. In this paper, establishing cutting process dynamic analysis model is based on the tool wear and creating the evaluation model about the influence of tool wear on the cutting system stability by power spectral RMS method. Root locus plot of non-uniform load distribution is obtained and the minimum stiffness ratio in the root locus plot is determined. So as to arrive the limit plot in different tool wear cutting system stability domain and determine the flank wear limit in the stable cutting quantitatively and offer the parameter of design and evaluation indicators to cutting system. The results found that with the increase in cutting speed and tool wear intensifies, the system stability is sharp in decline and tool wear is more intense. Obtaining limit diagram of cutting stability domain is suitable for providing a theoretical basis for processing in the different tool wear conditions.